/* roulang page: index */
:root{
  --ink-900:#170E33;
  --ink-700:#3A2E5C;
  --ink-500:#6E6389;
  --brand-600:#4B2A8C;
  --brand-800:#2B1A5E;
  --aurora-400:#37E0C4;
  --amber-500:#F2A93B;
  --paper-50:#F6F2EA;
  --card-00:#FFFFFF;
  --line-soft:rgba(23,14,51,.08);
  --ok:#2F9E6B;
  --warn:#D2453F;
  --grad-brand:linear-gradient(135deg,#4B2A8C 0%,#2B1A5E 48%,#17707F 100%);
  --grad-aurora:linear-gradient(120deg,#37E0C4 0%,#6FD8F0 45%,#9C7BF0 100%);
  --grad-amber:linear-gradient(120deg,#F7C46A 0%,#F2A93B 100%);
  --sh-1:0 6px 18px rgba(34,20,70,.06);
  --sh-2:0 18px 44px rgba(34,20,70,.12);
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--paper-50);
  letter-spacing:0;
  text-align:left;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding-left:0;list-style:none}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--ink-900)}
button{font:inherit;cursor:pointer;border:0;background:none}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section--tight{padding:64px 0}
.num{font-variant-numeric:tabular-nums}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(246,242,234,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.nav-wrap{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:14px;
  background:var(--grad-brand);
  display:grid;place-items:center;
  box-shadow:var(--sh-1);
}
.brand-mark svg{width:20px;height:20px;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:17px;font-weight:800;color:var(--ink-900);letter-spacing:0}
.brand-text small{font-size:11.5px;color:var(--ink-500);letter-spacing:.06em}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.main-nav a{
  position:relative;
  display:block;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--ink-700);
  border-radius:8px;
  white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:3px;border-radius:3px;
  background:var(--aurora-400);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .2s var(--ease);
}
.main-nav a:hover{color:var(--brand-600);background:rgba(75,42,140,.05)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a[aria-current="page"]{color:var(--brand-600);font-weight:700}
.main-nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav-cta{flex-shrink:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:0;
  transition:transform .22s var(--ease),filter .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{color:#fff;filter:brightness(1.06);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-primary[disabled]{background:#B9B3C9;cursor:not-allowed;transform:none;filter:none;box-shadow:none}
.btn-outline{
  background:#fff;color:var(--brand-600);
  border:1.5px solid rgba(75,42,140,.35);
}
.btn-outline:hover{border-color:var(--brand-600);background:rgba(75,42,140,.05);color:var(--brand-800)}
.btn-outline:active{transform:translateY(1px)}
.btn-ghost{
  background:rgba(255,255,255,.12);
  color:#fff;border:1.5px solid rgba(255,255,255,.5);
}
.btn-ghost:hover{background:rgba(255,255,255,.2);color:#fff;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand-600)}
.link-arrow .arw{transition:transform .2s var(--ease)}
.link-arrow:hover .arw{transform:translateX(4px)}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  background:var(--grad-brand);
  color:#fff;
  isolation:isolate;
}
.hero-bg{
  position:absolute;inset:0;z-index:-2;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:right top;
  opacity:.55;
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:rgba(23,14,51,.45);
}
.hero::after{
  content:"";position:absolute;right:-6%;bottom:0;width:62%;height:2px;
  background:var(--grad-aurora);
  opacity:.85;
}
.hero-inner{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
  padding-top:76px;
  padding-bottom:88px;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
  color:#EAF7F4;
  background:rgba(55,224,196,.16);
  border:1px solid rgba(55,224,196,.5);
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--aurora-400);display:block}
.hero h1{
  margin-top:20px;
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.15;
  font-weight:800;
  color:#fff;
  letter-spacing:0;
}
.hero-sub{
  margin-top:18px;
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.7;
  color:rgba(255,255,255,.85);
  max-width:560px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:14px;margin-top:36px;
}
.hero-stats li{
  background:rgba(255,255,255,.88);
  border-radius:var(--r-md);
  padding:12px 18px;
  border-left:3px solid var(--amber-500);
  min-width:150px;
  box-shadow:var(--sh-1);
}
.hero-stats strong{
  display:block;
  font-size:24px;font-weight:800;line-height:1.2;
  color:var(--ink-900);
  font-variant-numeric:tabular-nums;
}
.hero-stats span{display:block;font-size:12px;color:var(--ink-500);line-height:1.5;margin-top:2px}
.hero-visual{position:relative}
.hero-shot{
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh-2);
  border:1px solid rgba(255,255,255,.28);
  aspect-ratio:4/3;
  background:rgba(255,255,255,.08);
}
.hero-shot img{width:100%;height:100%;object-fit:cover}
.hero-float{
  position:absolute;left:-28px;bottom:-24px;
  background:#fff;
  border-radius:var(--r-md);
  padding:16px 20px;
  box-shadow:var(--sh-2);
  border:1px solid var(--line-soft);
  min-width:200px;
}
.hero-float .fl-label{font-size:12px;color:var(--ink-500);letter-spacing:.04em}
.hero-float .fl-value{
  font-size:26px;font-weight:800;color:var(--ink-900);line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.hero-float .fl-value em{font-style:normal;font-size:14px;font-weight:600;color:var(--ink-500);margin-left:4px}
.hero-float .fl-bar{margin-top:10px;height:8px;border-radius:999px;background:rgba(75,42,140,.12);overflow:hidden}
.hero-float .fl-bar i{display:block;height:100%;width:86%;border-radius:999px;background:var(--grad-aurora)}

/* ---------- 信任横条 ---------- */
.trust{border-bottom:1px solid var(--line-soft);background:#fff}
.trust-inner{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:26px 0;
}
.trust-item{display:flex;gap:14px;align-items:flex-start}
.trust-ico{
  width:40px;height:40px;flex:0 0 40px;border-radius:50%;
  background:rgba(55,224,196,.12);
  display:grid;place-items:center;color:var(--brand-600);
}
.trust-ico svg{width:19px;height:19px}
.trust-item strong{display:block;font-size:15px;color:var(--ink-900);font-weight:700}
.trust-item span{display:block;font-size:13px;color:var(--ink-500);line-height:1.55}

/* ---------- 通用板块头 ---------- */
.sec-head{margin-bottom:44px;max-width:820px}
.sec-eyebrow{
  display:inline-block;
  font-size:12.5px;font-weight:700;letter-spacing:.08em;
  color:var(--brand-600);
  background:rgba(75,42,140,.08);
  padding:4px 12px;border-radius:999px;
  margin-bottom:14px;
}
.sec-head h2{
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.25;font-weight:700;color:var(--ink-900);
}
.sec-head p{margin-top:12px;font-size:16px;line-height:1.8;color:var(--ink-500);max-width:760px}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}

/* ---------- 阶梯卡 ---------- */
.ladder{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  position:relative;
}
.ladder-card{
  background:var(--card-00);
  border-radius:var(--r-lg);
  border:1px solid var(--line-soft);
  box-shadow:var(--sh-1);
  padding:28px;
  display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  position:relative;
}
.ladder-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.ladder-card.is-hot{border-color:rgba(55,224,196,.6);box-shadow:var(--sh-2)}
.ladder-card.is-hot::before{
  content:"推荐";
  position:absolute;top:-12px;right:24px;
  background:var(--grad-aurora);color:#0E3A38;
  font-size:12px;font-weight:700;letter-spacing:.04em;
  padding:3px 12px;border-radius:999px;
}
.ladder-step{
  font-size:12.5px;font-weight:700;letter-spacing:.06em;color:var(--ink-500);
  font-variant-numeric:tabular-nums;
}
.ladder-card h3{margin-top:8px;font-size:21px;font-weight:700;color:var(--ink-900);line-height:1.4}
.ladder-threshold{
  margin-top:12px;font-size:13.5px;color:var(--ink-700);
  padding:8px 12px;border-radius:var(--r-sm);
  background:rgba(75,42,140,.06);
  font-variant-numeric:tabular-nums;
}
.ladder-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.ladder-list li{position:relative;padding-left:22px;font-size:14.5px;line-height:1.7;color:var(--ink-700)}
.ladder-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:8px;height:8px;border-radius:50%;
  background:var(--aurora-400);
}
.ladder-foot{margin-top:20px;padding-top:16px;border-top:1px solid var(--line-soft);display:flex;align-items:center;justify-content:space-between;gap:12px}
.chip-amber{
  display:inline-flex;align-items:center;
  background:var(--grad-amber);color:var(--ink-900);
  font-size:12px;font-weight:700;letter-spacing:.04em;
  padding:4px 12px;border-radius:999px;
}
.chip-soft{
  display:inline-flex;align-items:center;
  background:rgba(75,42,140,.08);color:var(--brand-600);
  font-size:12px;font-weight:600;letter-spacing:.04em;
  padding:4px 12px;border-radius:999px;
}
.dot{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--ink-500)}
.dot i{width:6px;height:6px;border-radius:50%;background:var(--ok);display:block}
.dot.is-warn i{background:var(--warn)}

/* ---------- 套餐对比 ---------- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.plan{
  background:var(--card-00);
  border-radius:var(--r-lg);
  border:1px solid var(--line-soft);
  box-shadow:var(--sh-1);
  padding:28px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.plan:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.plan-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.plan-top h3{font-size:22px;font-weight:800;color:var(--ink-900)}
.plan-model{font-size:12.5px;color:var(--ink-500);font-weight:600;letter-spacing:.04em}
.plan-desc{margin-top:8px;font-size:14px;color:var(--ink-500);line-height:1.7;min-height:48px}
.plan-rows{margin-top:18px}
.plan-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:11px 0;border-bottom:1px solid var(--line-soft);
  font-size:14px;
}
.plan-row:last-child{border-bottom:0}
.plan-row dt{color:var(--ink-500)}
.plan-row dd{margin:0;color:var(--ink-900);font-weight:600;font-variant-numeric:tabular-nums;text-align:right}
.plan-row.is-diff dt{position:relative;padding-left:14px;color:var(--brand-600)}
.plan-row.is-diff dt::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--aurora-400);
}
.plan .btn{width:100%;margin-top:20px;height:44px}

/* ---------- 限时横幅 ---------- */
.limited{
  background:var(--grad-brand);
  border-radius:var(--r-lg);
  padding:36px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  color:#fff;
  box-shadow:var(--sh-2);
  position:relative;overflow:hidden;
}
.limited::after{
  content:"";position:absolute;right:-40px;top:-40px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(55,224,196,.28),transparent 68%);
}
.limited-copy{position:relative;z-index:1;max-width:620px}
.limited-copy h3{font-size:clamp(20px,2.2vw,27px);font-weight:700;line-height:1.35;color:#fff}
.limited-copy p{margin-top:10px;font-size:15px;line-height:1.75;color:rgba(255,255,255,.82)}
.limited-right{position:relative;z-index:1;display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.countdown{display:flex;gap:10px}
.cd-cell{
  background:var(--grad-amber);
  color:var(--ink-900);
  border-radius:var(--r-sm);
  padding:8px 0 6px;
  width:66px;text-align:center;
  box-shadow:var(--sh-1);
}
.cd-cell b{display:block;font-size:22px;font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums}
.cd-cell span{display:block;font-size:11px;font-weight:600;opacity:.75}

/* ---------- 错落网格 ---------- */
.grid-knack{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.knack-card{
  background:var(--card-00);
  border-radius:var(--r-lg);
  border:1px solid var(--line-soft);
  box-shadow:var(--sh-1);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.knack-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.knack-card .kc-media{aspect-ratio:16/9;overflow:hidden;background:rgba(75,42,140,.08)}
.knack-card .kc-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.knack-card:hover .kc-media img{transform:scale(1.04)}
.knack-card .kc-body{padding:26px 28px 28px;display:flex;flex-direction:column;flex:1}
.knack-card h3{font-size:21px;font-weight:700;color:var(--ink-900);line-height:1.4}
.knack-card p{margin-top:10px;font-size:14.5px;line-height:1.78;color:var(--ink-500)}
.kc-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.kc-tags span{
  font-size:12px;font-weight:600;color:var(--brand-600);
  background:rgba(75,42,140,.08);
  padding:4px 10px;border-radius:999px;
}
.knack-card .link-arrow{margin-top:auto;padding-top:20px;font-size:14.5px}
.span-7{grid-column:span 7}
.span-5{grid-column:span 5}
.span-12{grid-column:span 12}
.knack-card.is-wide{flex-direction:row}
.knack-card.is-wide .kc-media{aspect-ratio:auto;width:44%;flex:0 0 44%}

/* ---------- 资讯 ---------- */
.news-wrap{display:grid;grid-template-columns:5fr 7fr;gap:24px}
.news-lead{
  display:block;
  background:var(--card-00);
  border-radius:var(--r-lg);
  border:1px solid var(--line-soft);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.news-lead:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.news-lead .nl-media{aspect-ratio:16/10;overflow:hidden;background:rgba(75,42,140,.08)}
.news-lead .nl-media img{width:100%;height:100%;object-fit:cover}
.news-lead .nl-body{padding:24px 26px 26px}
.news-lead h3{margin-top:12px;font-size:20px;font-weight:700;color:var(--ink-900);line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-lead p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-side{display:grid;gap:16px;align-content:start}
.news-card{
  display:block;
  background:var(--card-00);
  border-radius:var(--r-md);
  border:1px solid var(--line-soft);
  padding:18px 20px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-1);border-color:rgba(55,224,196,.45)}
.news-card h3{margin-top:8px;font-size:16.5px;font-weight:700;color:var(--ink-900);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card p{margin-top:6px;font-size:13.5px;line-height:1.7;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:12.5px;color:var(--ink-500);font-variant-numeric:tabular-nums}
.news-meta .sep{width:4px;height:4px;border-radius:50%;background:var(--ink-500);opacity:.4}
.empty-news{
  border:1px dashed rgba(75,42,140,.28);
  background:rgba(55,224,196,.06);
  border-radius:var(--r-lg);
  padding:56px 24px;
  text-align:center;
}
.empty-news .en-ico{
  width:52px;height:52px;border-radius:50%;margin:0 auto 14px;
  background:rgba(75,42,140,.08);display:grid;place-items:center;color:var(--brand-600);
}
.empty-news p{font-size:15px;color:var(--ink-700)}
.empty-news .btn{margin-top:18px;height:44px}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-intro h2{font-size:clamp(24px,2.6vw,34px);line-height:1.25;font-weight:700;color:var(--ink-900)}
.faq-intro p{margin-top:14px;font-size:15px;line-height:1.8;color:var(--ink-500)}
.faq-intro .btn{margin-top:24px}
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--card-00);
  border-radius:var(--r-md);
  border:1px solid var(--line-soft);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-item:hover{border-color:rgba(55,224,196,.4)}
.faq-item.is-open{border-color:rgba(55,224,196,.45);box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;text-align:left;
  font-size:17px;font-weight:700;color:var(--ink-900);
  line-height:1.5;
}
.faq-q .plus{
  position:relative;flex:0 0 20px;width:20px;height:20px;
  transition:transform .25s var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-600);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:14px;height:2px}
.faq-q .plus::after{width:2px;height:14px}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a-inner{
  padding:0 22px 20px;
  font-size:15px;line-height:1.8;color:var(--ink-700);
}
.faq-item.is-open .faq-a-inner{padding-top:4px}

/* ---------- 表单 ---------- */
.consult{background:#fff;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.consult-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:start}
.consult-points{display:flex;flex-direction:column;gap:18px;margin-top:28px}
.consult-points li{display:flex;gap:14px;align-items:flex-start;font-size:15px;line-height:1.7;color:var(--ink-700)}
.tick{
  flex:0 0 22px;width:22px;height:22px;border-radius:50%;
  background:rgba(55,224,196,.16);
  display:grid;place-items:center;color:#17707F;margin-top:2px;
}
.tick svg{width:12px;height:12px}
.form-card{
  background:var(--card-00);
  border-radius:var(--r-lg);
  border:1px solid var(--line-soft);
  box-shadow:var(--sh-2);
  padding:32px;
}
.form-card h3{font-size:20px;font-weight:700;color:var(--ink-900)}
.form-card .form-tip{margin-top:6px;font-size:13.5px;color:var(--ink-500)}
.field{margin-top:18px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink-700);margin-bottom:8px}
.field .req{color:var(--warn);margin-left:2px}
.field input,.field select,.field textarea{
  width:100%;
  border:1px solid var(--line-soft);
  border-radius:var(--r-sm);
  background:#FCFAF6;
  padding:0 14px;
  height:46px;
  font-size:15px;
  color:var(--ink-900);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field textarea{height:auto;padding:12px 14px;min-height:104px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#A29AB6}
.field input:hover,.field select:hover,.field textarea:hover{border-color:rgba(75,42,140,.28)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--aurora-400);
  box-shadow:0 0 0 4px rgba(55,224,196,.15);
  background:#fff;
}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--warn)}
.field .err{display:none;margin-top:6px;font-size:13px;color:var(--warn)}
.field.has-error .err{display:block}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-card .btn{width:100%;margin-top:24px}
.form-note{margin-top:14px;font-size:12.5px;line-height:1.7;color:var(--ink-500)}
.form-note a{text-decoration:underline;text-underline-offset:3px}
.form-ok{
  display:none;margin-top:16px;padding:12px 16px;border-radius:var(--r-sm);
  background:rgba(47,158,107,.1);color:#1F6E49;font-size:14px;font-weight:600;
}
.form-ok.show{display:block}

/* ---------- CTA 条 ---------- */
.cta-bar{
  background:var(--ink-900);
  color:#fff;
  border-radius:var(--r-lg);
  padding:36px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  flex-wrap:wrap;
}
.cta-bar h3{font-size:clamp(19px,2vw,25px);font-weight:700;color:#fff;line-height:1.4}
.cta-bar p{margin-top:8px;font-size:14.5px;color:rgba(255,255,255,.72);line-height:1.7}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.7);
  padding:72px 0 0;
  margin-top:96px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text small{color:rgba(255,255,255,.55)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:320px}
.footer-brand .contact{margin-top:18px;font-size:14px;line-height:2;color:rgba(255,255,255,.7)}
.footer-brand .contact b{color:#fff;font-weight:600;font-variant-numeric:tabular-nums}
.footer-col h4{font-size:14px;font-weight:700;color:rgba(255,255,255,.85);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7)}
.footer-col a:hover{color:var(--aurora-400)}
.footer-bottom{
  margin-top:52px;
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom .fb-left{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.footer-bottom .sep{width:1px;height:12px;background:rgba(255,255,255,.2)}
.to-top{
  width:48px;height:48px;border-radius:50%;
  border:1.5px solid var(--aurora-400);
  color:var(--aurora-400);
  display:grid;place-items:center;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.to-top:hover{background:var(--aurora-400);color:var(--ink-900);transform:translateY(-3px)}
.to-top svg{width:18px;height:18px}

/* ---------- 移动端底部 Tab ---------- */
.tabbar{display:none}
@media (max-width:768px){
  body{padding-bottom:76px}
  .site-footer{margin-bottom:0}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .container{padding:0 28px}
  .main-nav a{padding:8px 9px;font-size:14.5px}
  .nav-wrap{gap:18px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .container{padding:0 24px}
  .main-nav{display:none}
  .nav-wrap{justify-content:space-between}
  .hero-inner{grid-template-columns:1fr;gap:40px;padding-top:56px;padding-bottom:64px}
  .hero-visual{order:2}
  .hero-float{position:static;margin-top:16px;box-shadow:var(--sh-1)}
  .hero-shot{aspect-ratio:16/10}
  .ladder{grid-template-columns:1fr;gap:18px}
  .plans{grid-template-columns:1fr;gap:18px}
  .grid-knack{grid-template-columns:1fr}
  .span-7,.span-5,.span-12{grid-column:span 1}
  .knack-card.is-wide{flex-direction:column}
  .knack-card.is-wide .kc-media{width:100%;flex:none;aspect-ratio:16/9}
  .news-wrap{grid-template-columns:1fr}
  .faq-layout{grid-template-columns:1fr;gap:28px}
  .consult-grid{grid-template-columns:1fr;gap:36px}
  .trust-inner{grid-template-columns:repeat(2,1fr);gap:20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .limited{flex-direction:column;align-items:flex-start;padding:30px 28px}
  .limited-right{width:100%;justify-content:space-between}
}
@media (max-width:768px){
  .section{padding:52px 0}
  .container{padding:0 18px}
  .site-header{position:sticky}
  .nav-wrap{height:64px}
  .brand-mark{width:36px;height:36px;flex-basis:36px;border-radius:12px}
  .brand-text strong{font-size:15.5px}
  .brand-text small{font-size:10.5px}
  .nav-cta{height:40px;padding:0 16px;font-size:13.5px}
  .hero-inner{padding-top:44px;padding-bottom:52px;gap:32px}
  .hero-sub{max-width:none}
  .hero-cta{gap:12px}
  .hero-cta .btn{height:44px;flex:1 1 auto;justify-content:center}
  .hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .hero-stats li{min-width:0;padding:12px 14px}
  .hero-stats li:last-child{grid-column:span 2}
  .hero-stats strong{font-size:21px}
  .trust-inner{grid-template-columns:1fr;gap:16px;padding:22px 0}
  .sec-head{margin-bottom:30px}
  .sec-head--row{flex-direction:column;align-items:flex-start;gap:14px}
  .ladder-card,.plan,.form-card{padding:20px}
  .knack-card .kc-body{padding:20px}
  .limited{padding:24px 20px;gap:22px}
  .countdown{width:100%;gap:8px}
  .cd-cell{flex:1;width:auto}
  .cta-bar{padding:26px 22px;gap:20px}
  .cta-bar .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .site-footer{padding-top:52px;margin-top:52px}
  .footer-bottom{padding-bottom:24px;flex-direction:column;align-items:flex-start;gap:14px}
  .to-top{display:none}
  .form-card .btn{height:46px}
  .field-row{grid-template-columns:1fr}
  .news-lead h3{font-size:18px}
  .faq-q{font-size:16px;padding:16px 18px}
  .faq-a-inner{padding-left:18px;padding-right:18px}
  .tabbar{
    display:flex;
    position:fixed;left:0;right:0;bottom:0;z-index:95;
    background:#fff;
    border-top:1px solid var(--line-soft);
    box-shadow:0 -6px 18px rgba(34,20,70,.06);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .tabbar a{
    flex:1;
    min-height:60px;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:11.5px;font-weight:600;color:var(--ink-500);
    transition:color .2s var(--ease);
  }
  .tabbar a .tb-ico{
    width:40px;height:28px;border-radius:999px;
    display:grid;place-items:center;
    transition:background .2s var(--ease);
  }
  .tabbar a svg{width:19px;height:19px}
  .tabbar a.active{color:var(--brand-600)}
  .tabbar a.active .tb-ico{background:rgba(55,224,196,.12)}
  .tabbar a:active{color:var(--brand-800)}
}
@media (max-width:480px){
  .hero-stats{grid-template-columns:1fr}
  .hero-stats li:last-child{grid-column:span 1}
  .hero-cta .btn{flex:1 1 100%}
  .plan-row{font-size:13.5px}
  .ladder-card h3{font-size:19px}
}

/* roulang page: category1 */
:root{
  --ink-900:#170E33;
  --ink-700:#3A2E5C;
  --ink-500:#6E6389;
  --brand-600:#4B2A8C;
  --brand-800:#2B1A5E;
  --aurora-400:#37E0C4;
  --amber-500:#F2A93B;
  --paper-50:#F6F2EA;
  --card-00:#FFFFFF;
  --line-soft:rgba(23,14,51,.08);
  --ok:#2F9E6B;
  --warn:#D2453F;
  --grad-brand:linear-gradient(135deg,#4B2A8C 0%,#2B1A5E 48%,#17707F 100%);
  --grad-aurora:linear-gradient(120deg,#37E0C4 0%,#6FD8F0 45%,#9C7BF0 100%);
  --grad-amber:linear-gradient(120deg,#F7C46A 0%,#F2A93B 100%);
  --sh-1:0 6px 18px rgba(34,20,70,.06);
  --sh-2:0 18px 44px rgba(34,20,70,.12);
  --r-lg:24px; --r-md:16px; --r-sm:12px; --r-pill:999px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;color:var(--ink-700);
  background:var(--paper-50);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-800)}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:0;line-height:1.25}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px;border-radius:6px}

.container{max-width:1200px;margin:0 auto;padding:0 32px;width:100%}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;margin-bottom:14px}
.section-head p{font-size:16px;color:var(--ink-500);max-width:780px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.04em;font-weight:600;
  color:var(--brand-600);background:rgba(75,42,140,.08);
  padding:5px 12px;border-radius:var(--r-pill);margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--aurora-400)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,242,234,.88);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  background:var(--grad-brand);box-shadow:var(--sh-1);
}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:800;color:var(--ink-900)}
.brand-text small{font-size:11px;letter-spacing:.08em;color:var(--ink-500);margin-top:2px}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:8px;flex:1}
.main-nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-700);
  padding:6px 0;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:2px;
  background:var(--aurora-400);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.main-nav a:hover{color:var(--brand-600)}
.main-nav a:hover::after,.main-nav a:focus-visible::after{transform:scaleX(1)}
.main-nav a[aria-current="page"]{color:var(--brand-600);font-weight:700}
.main-nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav-cta{flex-shrink:0}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .2s var(--ease),filter .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:var(--sh-2);color:#fff}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{background:var(--card-00);color:var(--brand-600);border:1.5px solid rgba(75,42,140,.35)}
.btn-ghost:hover{border-color:var(--brand-600);background:rgba(75,42,140,.05);transform:translateY(-2px);color:var(--brand-600)}
.btn-ghost:active{transform:translateY(0)}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.45)}
.btn-light:hover{background:rgba(255,255,255,.2);color:#fff;transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn[disabled]{background:rgba(110,99,137,.3);color:#fff;cursor:not-allowed;box-shadow:none;transform:none}
.arrow-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand-600);
}
.arrow-link svg{width:16px;height:16px;transition:transform .2s var(--ease)}
.arrow-link:hover svg{transform:translateX(4px)}

/* ---------- page head ---------- */
.page-head{
  position:relative;overflow:hidden;
  background:var(--grad-brand);color:#fff;
  padding:64px 0 76px;
}
.page-head::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:right center;
  opacity:.55;
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(23,14,51,.46) 0%,rgba(23,14,51,.72) 100%);
}
.page-head .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:26px}
.breadcrumb a{color:rgba(255,255,255,.82)}
.breadcrumb a:hover{color:var(--aurora-400)}
.breadcrumb span[aria-current]{color:#fff;font-weight:600}
.head-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.page-head h1{
  color:#fff;font-size:clamp(28px,3.8vw,46px);line-height:1.15;font-weight:800;
  margin-bottom:18px;
}
.page-head h1 em{font-style:normal;color:var(--aurora-400)}
.head-lead{font-size:17px;line-height:1.8;color:rgba(255,255,255,.86);max-width:620px}
.head-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.head-fact{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.24);
  border-radius:var(--r-pill);padding:7px 16px;font-size:13px;color:#fff;
}
.head-fact b{font-variant-numeric:tabular-nums;font-weight:800;color:var(--aurora-400)}
.head-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.head-visual{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-2);border:1px solid rgba(255,255,255,.22);
  aspect-ratio:4/3;background:rgba(255,255,255,.08);
}
.head-visual img{width:100%;height:100%;object-fit:cover}
.head-visual figcaption{
  position:absolute;left:16px;bottom:16px;right:16px;
  background:rgba(23,14,51,.72);color:#fff;font-size:13px;
  padding:10px 14px;border-radius:var(--r-sm);line-height:1.5;
}

/* ---------- product grid ---------- */
.product-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.product-card{
  display:flex;flex-direction:column;
  background:var(--card-00);border:1px solid var(--line-soft);
  border-radius:var(--r-lg);box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.product-card--lead{grid-column:1 / -1;flex-direction:row}
.pc-media{
  position:relative;background:rgba(75,42,140,.06);
  aspect-ratio:16/10;overflow:hidden;flex-shrink:0;
}
.product-card--lead .pc-media{width:52%;aspect-ratio:auto;min-height:340px}
.pc-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.product-card:hover .pc-media img{transform:scale(1.03)}
.pc-flag{
  position:absolute;top:14px;left:14px;
  background:var(--grad-amber);color:var(--ink-900);
  font-size:12px;font-weight:700;letter-spacing:.04em;
  padding:5px 12px;border-radius:var(--r-pill);
}
.pc-body{padding:28px;display:flex;flex-direction:column;gap:14px;flex:1}
.product-card--lead .pc-body{padding:36px;justify-content:center}
.pc-model{font-size:13px;letter-spacing:.04em;color:var(--ink-500);font-weight:600}
.pc-body h3{font-size:20px;line-height:1.4;font-weight:700}
.product-card--lead .pc-body h3{font-size:clamp(22px,2.2vw,28px)}
.pc-desc{font-size:15px;line-height:1.8;color:var(--ink-700)}
.spec-badges{display:flex;flex-wrap:wrap;gap:10px}
.spec-badge{
  background:rgba(75,42,140,.07);border-radius:var(--r-pill);
  padding:6px 14px;font-size:12px;letter-spacing:.04em;color:var(--brand-600);
  font-variant-numeric:tabular-nums;
}
.spec-badge b{font-weight:800;color:var(--ink-900)}
.pc-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line-soft);display:flex;align-items:center;justify-content:space-between;gap:12px}
.pc-tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{
  font-size:12px;color:var(--ink-500);background:rgba(23,14,51,.05);
  border-radius:var(--r-pill);padding:4px 10px;
}

/* ---------- spec groups ---------- */
.spec-band{background:var(--card-00);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.spec-groups{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.spec-card{
  background:var(--paper-50);border:1px solid var(--line-soft);border-radius:var(--r-md);
  padding:26px;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.spec-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.spec-card h3{font-size:18px;margin-bottom:6px}
.spec-card .spec-sub{font-size:13px;color:var(--ink-500);margin-bottom:16px}
.spec-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px solid var(--line-soft);font-size:14px}
.spec-row:last-child{border-bottom:0;padding-bottom:0}
.spec-row dt{color:var(--ink-500);flex-shrink:0}
.spec-row dd{margin:0;color:var(--ink-900);font-weight:600;text-align:right;font-variant-numeric:tabular-nums}

/* ---------- materials ---------- */
.material-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:12px}
.material-item{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--card-00);border:1px solid var(--line-soft);
  border-radius:var(--r-md);padding:22px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.material-item:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.material-ico{
  width:40px;height:40px;border-radius:50%;flex-shrink:0;
  display:grid;place-items:center;background:rgba(55,224,196,.12);color:var(--brand-600);
}
.material-ico svg{width:20px;height:20px}
.material-item h3{font-size:16px;margin-bottom:4px}
.material-item p{font-size:14px;color:var(--ink-500);line-height:1.7}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-intro p{font-size:15px;color:var(--ink-500);margin-top:12px;max-width:320px}
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--card-00);border:1px solid var(--line-soft);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);
  transition:border-color .22s var(--ease);
}
.faq-item.is-open{border-color:rgba(55,224,196,.5)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:17px;font-weight:700;color:var(--ink-900);
  transition:background .2s var(--ease);
}
.faq-q:hover{background:rgba(75,42,140,.03)}
.faq-ico{
  width:26px;height:26px;flex-shrink:0;border-radius:50%;
  display:grid;place-items:center;background:rgba(75,42,140,.08);
  color:var(--brand-600);transition:transform .25s var(--ease),background .2s var(--ease);
}
.faq-ico svg{width:14px;height:14px}
.faq-item.is-open .faq-ico{transform:rotate(45deg);background:rgba(55,224,196,.2)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease),padding .32s var(--ease)}
.faq-a p{padding:0 24px;font-size:15px;line-height:1.85;color:var(--ink-700)}
.faq-item.is-open .faq-a{max-height:420px;padding-bottom:22px}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--grad-brand);color:#fff;
  border-radius:var(--r-lg);padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--sh-2);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;
  border-radius:50%;background:radial-gradient(circle,rgba(55,224,196,.35),transparent 68%);
  pointer-events:none;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,30px);margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.82);font-size:15px;max-width:560px}
.cta-band .btn{position:relative;z-index:2;flex-shrink:0}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:72px 0 28px;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{margin-bottom:18px}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text small{color:rgba(255,255,255,.55)}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.7);max-width:340px}
.footer-brand .contact{margin-top:18px;font-size:14px;color:rgba(255,255,255,.7);line-height:1.9}
.footer-brand .contact b{color:#fff;font-variant-numeric:tabular-nums}
.footer-col h4{font-size:14px;font-weight:700;color:rgba(255,255,255,.85);margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7)}
.footer-col a:hover{color:var(--aurora-400)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.fb-left{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:rgba(255,255,255,.55)}
.fb-left .sep{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.35)}
.to-top{
  width:48px;height:48px;border-radius:50%;flex-shrink:0;
  display:grid;place-items:center;color:var(--aurora-400);
  border:1.5px solid rgba(55,224,196,.5);
  transition:background .2s var(--ease),transform .2s var(--ease),color .2s var(--ease);
}
.to-top svg{width:20px;height:20px}
.to-top:hover{background:rgba(55,224,196,.16);transform:translateY(-2px);color:#fff}

/* ---------- mobile tabbar ---------- */
.tabbar{display:none}
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:var(--card-00);border-top:1px solid var(--line-soft);
  box-shadow:0 -6px 18px rgba(34,20,70,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar-inner{display:grid;grid-template-columns:repeat(5,1fr);height:60px}
.tab-item{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  color:var(--ink-500);font-size:11px;line-height:1.2;
}
.tab-ico{
  width:40px;height:26px;border-radius:13px;display:grid;place-items:center;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.tab-ico svg{width:19px;height:19px}
.tab-item[aria-current="page"]{color:var(--brand-600);font-weight:700}
.tab-item[aria-current="page"] .tab-ico{background:rgba(55,224,196,.12)}
.tab-item:hover{color:var(--brand-600)}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .container{padding:0 24px}
  .main-nav{gap:16px}
  .main-nav a{font-size:14px}
}
@media (max-width:1024px){
  .main-nav{display:none}
  .nav-wrap{justify-content:space-between}
  .tabbar{display:block}
  body{padding-bottom:76px}
  .site-footer{margin-top:72px;padding-bottom:96px}
  .head-grid{grid-template-columns:1fr;gap:32px}
  .head-visual{aspect-ratio:16/10;order:2}
  .spec-groups{grid-template-columns:1fr 1fr}
  .material-grid{grid-template-columns:1fr 1fr}
  .faq-wrap{grid-template-columns:1fr;gap:28px}
  .faq-intro p{max-width:none}
  .section{padding:72px 0}
  .product-card--lead{flex-direction:column}
  .product-card--lead .pc-media{width:100%;aspect-ratio:16/9;min-height:0}
  .product-card--lead .pc-body{padding:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:52px 0}
  .section--tight{padding:44px 0}
  .page-head{padding:40px 0 52px}
  .head-lead{font-size:15.5px}
  .head-actions .btn{flex:1 1 auto;min-width:150px}
  .btn{height:44px;padding:0 18px;font-size:14.5px}
  .product-grid{grid-template-columns:1fr}
  .product-card--lead{grid-column:auto}
  .pc-body{padding:20px}
  .spec-groups{grid-template-columns:1fr}
  .material-grid{grid-template-columns:1fr}
  .cta-band{padding:28px 22px;border-radius:var(--r-md)}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;align-items:center;text-align:center;gap:16px}
  .faq-q{font-size:15.5px;padding:16px 18px}
  .faq-a p{padding:0 18px;font-size:14.5px}
  .nav-cta{height:38px;padding:0 14px;font-size:13px}
  .brand-text strong{font-size:15px}
}
@media (max-width:520px){
  .brand-text small{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .tab-item{font-size:10.5px}
}

/* roulang page: article */
:root{
  --ink-900:#170E33;
  --ink-700:#3A2E5C;
  --ink-500:#6E6389;
  --brand-600:#4B2A8C;
  --brand-800:#2B1A5E;
  --aurora-400:#37E0C4;
  --amber-500:#F2A93B;
  --paper-50:#F6F2EA;
  --card-00:#FFFFFF;
  --line-soft:rgba(23,14,51,.08);
  --ok:#2F9E6B;
  --warn:#D2453F;
  --grad-brand:linear-gradient(135deg,#4B2A8C 0%,#2B1A5E 48%,#17707F 100%);
  --grad-aurora:linear-gradient(120deg,#37E0C4 0%,#6FD8F0 45%,#9C7BF0 100%);
  --grad-amber:linear-gradient(135deg,#F7C46A 0%,#F2A93B 100%);
  --sh-1:0 6px 18px rgba(34,20,70,.06);
  --sh-2:0 18px 44px rgba(34,20,70,.12);
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--paper-50);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,242,234,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.nav-wrap{height:72px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;border-radius:13px;background:var(--grad-brand);
  display:grid;place-items:center;box-shadow:var(--sh-1);flex:0 0 auto;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;color:var(--ink-900);font-weight:800;letter-spacing:0}
.brand-text small{font-size:11px;color:var(--ink-500);letter-spacing:.12em;margin-top:3px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.main-nav a{
  position:relative;padding:10px 12px;font-size:14px;color:var(--ink-700);
  border-radius:10px;white-space:nowrap;transition:color .2s,background .2s;
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:3px;border-radius:3px;
  background:var(--aurora-400);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.main-nav a:hover{color:var(--brand-600);background:rgba(75,42,140,.04)}
.main-nav a:hover::after,.main-nav a[aria-current="page"]::after{transform:scaleX(1)}
.main-nav a[aria-current="page"]{color:var(--brand-600);font-weight:700}
.nav-cta{flex:0 0 auto}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:999px;border:1.5px solid transparent;
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .22s cubic-bezier(.2,.7,.3,1),filter .22s,box-shadow .22s,background .22s,border-color .22s,color .22s;
}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:0 8px 18px rgba(43,26,94,.18)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-primary:disabled{background:rgba(23,14,51,.3);color:rgba(255,255,255,.7);cursor:not-allowed;box-shadow:none;transform:none}
.btn-light{background:#fff;color:var(--brand-600);border-color:rgba(75,42,140,.35)}
.btn-light:hover{border-color:var(--brand-600);background:rgba(75,42,140,.05);transform:translateY(-2px)}
.btn-light:active{transform:translateY(0);background:rgba(75,42,140,.09)}
.btn-light:disabled{background:rgba(23,14,51,.06);color:var(--ink-500);cursor:not-allowed;border-color:var(--line-soft);transform:none}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand-600);font-size:14px;font-weight:700}
.text-link span{transition:transform .2s}
.text-link:hover span{transform:translateX(4px)}
.text-link:active{opacity:.7}
.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:4px 10px;font-size:12px;letter-spacing:.04em;line-height:1.4}
.badge-brand{color:var(--brand-600);background:rgba(75,42,140,.08)}
.badge-soft{color:var(--brand-600);background:rgba(55,224,196,.12)}
.badge-gold{background:var(--grad-amber);color:var(--ink-900);font-weight:700}
.article-hero{
  position:relative;overflow:hidden;background:var(--grad-brand);color:#fff;
  padding:42px 0 54px;
}
.article-hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.28;z-index:0;pointer-events:none;
}
.article-hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:linear-gradient(90deg,rgba(23,14,51,.58) 0%,rgba(23,14,51,.22) 70%,rgba(23,14,51,.42) 100%);
}
.article-hero::after{
  content:"";position:absolute;right:-80px;bottom:-90px;width:340px;height:340px;border-radius:50%;
  background:var(--grad-aurora);opacity:.12;filter:blur(10px);z-index:0;pointer-events:none;
}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:38px}
.breadcrumb a{color:rgba(255,255,255,.78);transition:color .2s}
.breadcrumb a:hover{color:var(--aurora-400)}
.breadcrumb .current{color:#fff;max-width:620px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head h1{
  margin:14px 0 18px;max-width:940px;font-size:clamp(30px,4.4vw,52px);line-height:1.15;
  font-weight:800;letter-spacing:0;color:#fff;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.72)}
.article-meta i{width:4px;height:4px;border-radius:50%;background:var(--amber-500);display:inline-block}
.article-meta span{display:inline-flex;align-items:center}
.article-section{padding-top:56px;padding-bottom:96px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:48px;align-items:start}
.article-main{min-width:0;max-width:820px}
.article-body{
  background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  padding:42px 46px;box-shadow:var(--sh-1);
}
.article-body > :first-child{margin-top:0}
.article-body h2{
  position:relative;margin:40px 0 16px;padding-bottom:10px;
  font-size:clamp(24px,2.6vw,34px);line-height:1.25;color:var(--ink-900);font-weight:700;letter-spacing:0;
}
.article-body h2::after{content:"";position:absolute;left:0;bottom:0;width:24px;height:3px;border-radius:3px;background:var(--aurora-400)}
.article-body h3{margin:28px 0 10px;font-size:21px;line-height:1.4;color:var(--ink-900);font-weight:700}
.article-body p{margin:0 0 18px;font-size:16px;line-height:1.85;color:var(--ink-700)}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:20px}
.article-body li{margin:8px 0;line-height:1.8}
.article-body ul li::marker{color:var(--aurora-400);font-size:1.1em}
.article-body blockquote{
  margin:26px 0;padding:20px 22px;background:var(--paper-50);
  border-left:3px solid var(--aurora-400);border-radius:0 14px 14px 0;color:var(--ink-700);
}
.article-body img{max-width:100%;height:auto;margin:22px auto;border-radius:16px}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:8px;text-align:center;font-size:13px;color:var(--ink-500)}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-body a:hover{color:var(--brand-800)}
.article-body table{width:100%;display:block;overflow-x:auto;border-collapse:collapse;margin:22px 0;font-size:14px}
.article-body th,.article-body td{border:1px solid var(--line-soft);padding:12px 14px;text-align:left;white-space:nowrap}
.article-body th{background:rgba(75,42,140,.08);color:var(--ink-900);font-weight:700}
.article-body tr:nth-child(even) td{background:rgba(23,14,51,.03)}
.article-body code{background:rgba(55,224,196,.12);border-radius:6px;padding:2px 6px;color:var(--brand-800)}
.empty-state{text-align:center;padding:48px 20px}
.empty-state h2{margin:0 0 12px;border:0;padding:0}
.empty-state h2::after{display:none}
.empty-state p{max-width:440px;margin:0 auto 24px;color:var(--ink-500)}
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 0}
.tag{
  display:inline-flex;padding:6px 12px;border-radius:999px;background:#fff;
  border:1px solid var(--line-soft);font-size:13px;color:var(--ink-500);
  transition:border-color .2s,color .2s,background .2s;
}
.tag:hover{border-color:rgba(55,224,196,.45);color:var(--brand-600);background:rgba(55,224,196,.08)}
.post-pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0 0}
.pager-card{
  display:flex;flex-direction:column;gap:6px;padding:20px 22px;background:#fff;
  border:1px solid var(--line-soft);border-radius:var(--r-md);box-shadow:var(--sh-1);
  transition:transform .22s,box-shadow .22s,border-color .22s;
}
.pager-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.pager-label{font-size:12px;color:var(--ink-500);letter-spacing:.08em}
.pager-card strong{font-size:15px;color:var(--ink-900);line-height:1.5}
.related-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin:56px 0 22px}
.eyebrow{display:block;font-size:12px;letter-spacing:.16em;color:var(--brand-600);font-weight:700;margin-bottom:8px}
.related-head h2{margin:0;font-size:clamp(22px,2.2vw,30px);color:var(--ink-900);line-height:1.3}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.related-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform .22s,box-shadow .22s,border-color .22s;
  display:flex;flex-direction:column;
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.related-img{aspect-ratio:16/10;overflow:hidden;background:rgba(75,42,140,.06)}
.related-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.related-card:hover .related-img img{transform:scale(1.04)}
.related-body{padding:18px;display:flex;flex-direction:column;gap:9px}
.related-body h3{margin:0;font-size:16px;line-height:1.45;color:var(--ink-900)}
.related-body p{margin:0;font-size:13px;line-height:1.65;color:var(--ink-500)}
.article-cta-strip{
  margin-top:34px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 28px;border-radius:var(--r-md);background:var(--grad-brand);color:#fff;box-shadow:var(--sh-1);
}
.article-cta-strip strong{display:block;font-size:18px;line-height:1.4}
.article-cta-strip span{display:block;margin-top:5px;font-size:14px;color:rgba(255,255,255,.74)}
.article-cta-strip .btn-primary{background:#fff;color:var(--brand-600);box-shadow:none}
.article-cta-strip .btn-primary:hover{background:var(--paper-50)}
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
.side-card{background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-md);padding:22px;box-shadow:var(--sh-1)}
.side-card h3{margin:0 0 14px;font-size:16px;color:var(--ink-900)}
.toc{display:flex;flex-direction:column;gap:4px}
.toc a{
  position:relative;padding:9px 10px 9px 16px;border-radius:10px;font-size:14px;color:var(--ink-700);
  transition:background .2s,color .2s;
}
.toc a::before{content:"";position:absolute;left:0;top:14px;width:3px;height:14px;border-radius:3px;background:var(--line-soft)}
.toc a:hover{background:rgba(55,224,196,.08);color:var(--brand-600)}
.toc a.active{background:rgba(75,42,140,.06);color:var(--brand-600);font-weight:700}
.toc a.active::before{background:var(--aurora-400)}
.toc-note{margin-top:12px;padding-top:12px;border-top:1px solid var(--line-soft);font-size:12px;color:var(--ink-500);line-height:1.6}
.consult-card{background:var(--grad-brand);border-color:transparent;color:#fff;overflow:hidden;padding:0}
.consult-img{aspect-ratio:16/9;overflow:hidden;background:rgba(255,255,255,.08)}
.consult-img img{width:100%;height:100%;object-fit:cover;opacity:.9}
.consult-card h3,.consult-card p,.consult-card .consult-tel{margin-left:22px;margin-right:22px}
.consult-card h3{margin-top:20px;color:#fff}
.consult-card p{font-size:14px;line-height:1.7;color:rgba(255,255,255,.74);margin-bottom:16px}
.consult-card .btn-light{margin:0 22px;width:calc(100% - 44px);background:#fff;color:var(--brand-600)}
.consult-tel{display:block;margin-top:12px;font-size:13px;color:rgba(255,255,255,.72);padding-bottom:22px}
.mini-read a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 0;
  border-bottom:1px solid var(--line-soft);font-size:14px;color:var(--ink-700);transition:color .2s;
}
.mini-read a:last-child{border-bottom:0;padding-bottom:0}
.mini-read a:hover{color:var(--brand-600)}
.mini-read em{font-style:normal;font-size:11px;color:var(--ink-500);background:var(--paper-50);padding:2px 8px;border-radius:999px}
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:44px}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text small{color:rgba(255,255,255,.55)}
.footer-brand p{margin:18px 0;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:340px}
.contact{font-size:14px;line-height:1.9;color:rgba(255,255,255,.72)}
.contact b{color:var(--aurora-400);font-variant-numeric:tabular-nums}
.footer-col h4{margin:0 0 16px;font-size:14px;color:rgba(255,255,255,.8)}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7);transition:color .2s}
.footer-col a:hover{color:var(--aurora-400)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(255,255,255,.5);
}
.fb-left{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.sep{width:1px;height:12px;background:rgba(255,255,255,.18)}
.to-top{
  width:48px;height:48px;border-radius:50%;display:grid;place-items:center;
  border:1px solid rgba(55,224,196,.7);color:var(--aurora-400);
  transition:background .2s,color .2s,transform .2s;flex:0 0 auto;
}
.to-top svg{width:20px;height:20px}
.to-top:hover{background:var(--aurora-400);color:var(--ink-900);transform:translateY(-2px)}
.to-top:active{transform:translateY(0)}
.mobile-tab{display:none}
@media (max-width:1024px){
  .section{padding:72px 0}
  .container{padding:0 24px}
  .nav-wrap{height:auto;padding-top:14px;padding-bottom:10px;flex-wrap:wrap;gap:14px 20px}
  .main-nav{order:3;width:100%;margin-left:0;overflow-x:auto;padding-bottom:6px;scrollbar-width:thin}
  .main-nav a{padding:8px 10px;font-size:13px}
  .nav-cta{margin-left:auto;height:42px;padding:0 18px;font-size:14px}
  .article-layout{grid-template-columns:1fr;gap:34px}
  .article-main{max-width:none}
  .article-side{position:static;display:grid;grid-template-columns:repeat(2,1fr)}
  .toc-card{grid-column:1 / -1}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
  .article-section{padding-bottom:72px}
}
@media (max-width:768px){
  body{padding-bottom:76px}
  .section{padding:52px 0}
  .container{padding:0 18px}
  .nav-wrap{padding-top:12px}
  .brand-text strong{font-size:15px}
  .nav-cta{display:none}
  .article-hero{padding:30px 0 38px}
  .breadcrumb{margin-bottom:26px;font-size:13px}
  .article-head h1{font-size:clamp(26px,7vw,36px)}
  .article-body{padding:26px 20px;border-radius:18px}
  .article-body h2{margin-top:32px}
  .article-layout{gap:24px}
  .article-side{grid-template-columns:1fr}
  .toc-card{grid-column:auto}
  .related-head{align-items:flex-start;flex-direction:column;gap:10px;margin-top:40px}
  .related-grid{grid-template-columns:1fr}
  .post-pager{grid-template-columns:1fr}
  .article-cta-strip{flex-direction:column;align-items:flex-start;padding:22px}
  .article-cta-strip .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
  .footer-bottom{flex-direction:column;align-items:flex-start;margin-top:34px}
  .to-top{align-self:center}
  .article-section{padding-bottom:52px}
  .mobile-tab{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:90;height:60px;
    padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line-soft);
    box-shadow:0 -6px 18px rgba(34,20,70,.06);
  }
  .mobile-tab a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:10px;color:var(--ink-500)}
  .mobile-tab a.active{color:var(--brand-600)}
  .mobile-tab .tab-icon{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:transparent;transition:background .2s}
  .mobile-tab a.active .tab-icon{background:rgba(55,224,196,.12)}
  .mobile-tab svg{width:18px;height:18px}
}
@media (max-width:480px){
  .container{padding:0 16px}
  .article-meta{font-size:13px;gap:8px}
  .related-body{padding:16px}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .mobile-tab a{font-size:10px}
}

/* roulang page: category2 */
:root{
  --ink-900:#170E33;
  --ink-700:#3A2E5C;
  --ink-500:#6E6389;
  --brand-600:#4B2A8C;
  --brand-800:#2B1A5E;
  --aurora-400:#37E0C4;
  --amber-500:#F2A93B;
  --paper-50:#F6F2EA;
  --card-00:#FFFFFF;
  --line-soft:rgba(23,14,51,.08);
  --ok:#2F9E6B;
  --warn:#D2453F;
  --grad-brand:linear-gradient(135deg,#4B2A8C 0%,#2B1A5E 48%,#17707F 100%);
  --grad-aurora:linear-gradient(120deg,#37E0C4 0%,#6FD8F0 45%,#9C7BF0 100%);
  --grad-amber:linear-gradient(135deg,#F7C46A 0%,#F2A93B 100%);
  --sh-1:0 6px 18px rgba(34,20,70,.06);
  --sh-2:0 18px 44px rgba(34,20,70,.12);
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper-50);
  color:var(--ink-700);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  text-align:left;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:0;line-height:1.25}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.15;font-weight:800}
h2{font-size:clamp(24px,2.6vw,34px);font-weight:700}
h3{font-size:20px;font-weight:700;line-height:1.4}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease)}
button{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--aurora-400);
  outline-offset:2px;
  border-radius:8px;
}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head p{margin-top:14px;font-size:16px;color:var(--ink-500);line-height:1.8}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.04em;font-weight:700;
  color:var(--brand-600);background:rgba(75,42,140,.08);
  border-radius:999px;padding:5px 12px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--aurora-400)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,242,234,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--grad-brand);
  display:grid;place-items:center;flex-shrink:0;
}
.brand-mark svg{width:19px;height:19px}
.brand-text strong{display:block;font-size:15px;font-weight:800;color:var(--ink-900);line-height:1.3;letter-spacing:0}
.brand-text small{display:block;font-size:11px;color:var(--ink-500);letter-spacing:.04em;line-height:1.4}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:22px}
.main-nav a{
  position:relative;padding:6px 0;font-size:14.5px;font-weight:600;
  color:var(--ink-700);white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:3px;width:0;
  border-radius:999px;background:var(--aurora-400);transition:width .2s var(--ease);
}
.main-nav a:hover{color:var(--brand-600)}
.main-nav a:hover::after{width:100%}
.main-nav a[aria-current="page"]{color:var(--brand-600)}
.main-nav a[aria-current="page"]::after{width:100%}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:999px;border:0;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .22s var(--ease),filter .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.45)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.75);transform:translateY(-2px)}
.btn-outline{background:#fff;color:var(--brand-600);border:1.5px solid rgba(75,42,140,.35)}
.btn-outline:hover{border-color:var(--brand-600);background:rgba(75,42,140,.05);transform:translateY(-2px)}
.btn:disabled{background:rgba(23,14,51,.2);color:rgba(255,255,255,.75);cursor:not-allowed;transform:none;box-shadow:none;filter:none}
.nav-cta{height:40px;padding:0 18px;font-size:14px;margin-left:6px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;color:var(--brand-600)}
.text-link svg{width:16px;height:16px;transition:transform .22s var(--ease)}
.text-link:hover svg{transform:translateX(4px)}

/* ---------- Page head ---------- */
.page-head{
  position:relative;overflow:hidden;isolation:isolate;
  background:var(--grad-brand);color:#fff;
  padding:44px 0 72px;
}
.page-head::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center right;opacity:.5;
}
.page-head::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(120% 90% at 15% 20%,rgba(23,14,51,.35) 0%,rgba(23,14,51,.72) 65%,rgba(23,14,51,.86) 100%);
}
.page-head .glow-line{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--grad-aurora);opacity:.85;z-index:1;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:26px}
.crumbs a{color:rgba(255,255,255,.82)}
.crumbs a:hover{color:var(--aurora-400)}
.crumbs .sep{opacity:.5}
.crumbs .now{color:#fff;font-weight:600}
.page-head h1{color:#fff;max-width:900px;margin-bottom:20px}
.page-head h1 em{font-style:normal;color:var(--aurora-400)}
.page-lead{max-width:780px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.86)}
.head-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.head-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.chip-soft{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;font-size:13px;
  color:rgba(255,255,255,.9);background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.22);
}

/* ---------- Alternating rows ---------- */
.alt-rows{display:flex;flex-direction:column;gap:64px}
.alt-row{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.alt-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-1);aspect-ratio:16/11;background:rgba(75,42,140,.08);
}
.alt-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.alt-row:hover .alt-media img{transform:scale(1.03)}
.alt-num{
  position:absolute;left:18px;top:6px;
  font-size:clamp(52px,6vw,80px);font-weight:800;line-height:1;
  color:rgba(255,255,255,.85);font-variant-numeric:tabular-nums;
  text-shadow:0 3px 16px rgba(23,14,51,.45);letter-spacing:-.02em;
}
.alt-row:nth-child(even) .alt-media{order:2}
.alt-tag{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.04em;
  color:var(--brand-600);background:rgba(75,42,140,.08);
  border-radius:999px;padding:4px 12px;margin-bottom:14px;
}
.alt-body p{margin-top:12px;font-size:16px;line-height:1.8;color:var(--ink-700)}
.check-list{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.check-list li{position:relative;padding-left:28px;font-size:15px;color:var(--ink-700)}
.check-list li::before{
  content:"";position:absolute;left:0;top:6px;width:16px;height:16px;border-radius:50%;
  background:rgba(55,224,196,.16);
  box-shadow:inset 0 0 0 1.5px rgba(55,224,196,.75);
}
.check-list li::after{
  content:"";position:absolute;left:5px;top:11px;width:6px;height:3px;
  border-left:1.6px solid #12796B;border-bottom:1.6px solid #12796B;transform:rotate(-45deg);
}
.alt-body .text-link{margin-top:22px}

/* ---------- Spec cards ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.spec-card{
  background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-md);
  padding:28px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.spec-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.spec-card h3{font-size:18px;margin-bottom:6px}
.spec-card .sub{font-size:13px;color:var(--ink-500);margin-bottom:18px}
.spec-list{display:flex;flex-direction:column;gap:0}
.spec-list div{
  display:flex;justify-content:space-between;gap:12px;
  padding:11px 0;border-top:1px solid var(--line-soft);font-size:14px;
}
.spec-list dt{color:var(--ink-500);flex-shrink:0}
.spec-list dd{margin:0;color:var(--ink-900);font-weight:700;font-variant-numeric:tabular-nums;text-align:right}

/* ---------- Flow strip ---------- */
.flow-strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  background:var(--card-00);border:1px solid var(--line-soft);
  border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh-1);
}
.flow-step{display:flex;gap:14px;align-items:flex-start;position:relative}
.flow-step + .flow-step::before{
  content:"";position:absolute;left:-20px;top:18px;width:20px;height:1px;
  background:var(--line-soft);
}
.flow-dot{
  width:34px;height:34px;flex-shrink:0;border-radius:50%;
  display:grid;place-items:center;font-size:13px;font-weight:800;
  color:var(--brand-600);background:rgba(55,224,196,.16);
  box-shadow:inset 0 0 0 1.5px rgba(55,224,196,.6);
  font-variant-numeric:tabular-nums;
}
.flow-step h4{font-size:15px;margin-bottom:4px;color:var(--ink-900)}
.flow-step p{font-size:14px;color:var(--ink-500);line-height:1.65}

/* ---------- Quotes ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote-card{
  background:var(--card-00);border:1px solid var(--line-soft);border-left:3px solid var(--aurora-400);
  border-radius:var(--r-md);padding:26px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.quote-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.quote-card p{font-size:15px;line-height:1.8;color:var(--ink-700)}
.quote-meta{display:flex;align-items:center;gap:10px;margin-top:18px;font-size:13px;color:var(--ink-500)}
.quote-meta b{color:var(--ink-900);font-size:14px}
.quote-meta .dot{width:6px;height:6px;border-radius:50%;background:var(--amber-500)}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-aside h2{margin-bottom:14px}
.faq-aside p{font-size:15px;color:var(--ink-500);line-height:1.8}
.faq-aside .btn{margin-top:24px}
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-md);
  overflow:hidden;transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-item.open{border-color:rgba(55,224,196,.55);box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:700;color:var(--ink-900);line-height:1.5;
}
.faq-item.open .faq-q{padding-bottom:12px}
.faq-icon{
  width:26px;height:26px;flex-shrink:0;border-radius:50%;position:relative;
  background:rgba(75,42,140,.08);transition:transform .25s var(--ease),background-color .25s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-600);
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:12px;height:1.8px}
.faq-icon::after{width:1.8px;height:12px}
.faq-item.open .faq-icon{transform:rotate(45deg);background:rgba(55,224,196,.2)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a p{padding:0 22px 22px;font-size:15px;line-height:1.85;color:var(--ink-700)}

/* ---------- Consult ---------- */
.consult{background:var(--paper-50)}
.consult-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:start}
.consult-points{display:flex;flex-direction:column;gap:18px;margin-top:28px}
.consult-points li{display:flex;gap:12px;font-size:15px;color:var(--ink-700);line-height:1.7}
.consult-points li span{
  width:22px;height:22px;flex-shrink:0;border-radius:50%;margin-top:3px;
  background:rgba(55,224,196,.16);box-shadow:inset 0 0 0 1.5px rgba(55,224,196,.6);
  position:relative;
}
.consult-points li span::after{
  content:"";position:absolute;left:7px;top:8px;width:7px;height:4px;
  border-left:1.6px solid #12796B;border-bottom:1.6px solid #12796B;transform:rotate(-45deg);
}
.form-card{
  background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  padding:32px;box-shadow:var(--sh-2);
}
.form-card h3{font-size:20px;margin-bottom:6px}
.form-card .form-note{font-size:14px;color:var(--ink-500);margin-bottom:24px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:8px}
.field label i{font-style:normal;color:var(--warn);margin-left:2px}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line-soft);border-radius:var(--r-sm);
  background:#fff;color:var(--ink-900);font-size:15px;font-family:inherit;
  padding:0 14px;height:46px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{height:auto;min-height:104px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--aurora-400);box-shadow:0 0 0 4px rgba(55,224,196,.15);outline:none;
}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-tip{font-size:13px;color:var(--ink-500);margin-top:14px;line-height:1.7}
.form-ok{display:none;margin-top:14px;font-size:14px;color:var(--ok);font-weight:600}
.form-ok.show{display:block}

/* ---------- CTA bar ---------- */
.cta-bar{background:var(--ink-900);position:relative;overflow:hidden;padding:52px 0}
.cta-bar::before{
  content:"";position:absolute;left:0;top:0;right:0;height:2px;
  background:var(--grad-aurora);opacity:.9;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:#fff;font-size:clamp(22px,2.4vw,30px)}
.cta-inner p{color:rgba(255,255,255,.72);font-size:15px;margin-top:8px;max-width:620px}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .brand{margin-bottom:18px}
.footer-brand .brand-mark{background:rgba(255,255,255,.1)}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text small{color:rgba(255,255,255,.55)}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:380px}
.footer-brand .contact{margin-top:18px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.66)}
.footer-brand .contact b{color:#fff;font-variant-numeric:tabular-nums}
.footer-col h4{color:rgba(255,255,255,.85);font-size:14px;font-weight:700;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7)}
.footer-col a:hover{color:var(--aurora-400)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0 26px;
}
.fb-left{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.55)}
.fb-left .sep{width:1px;height:12px;background:rgba(255,255,255,.2)}
.to-top{
  width:48px;height:48px;border-radius:50%;display:grid;place-items:center;
  border:1.5px solid rgba(55,224,196,.65);color:var(--aurora-400);
  transition:background-color .22s var(--ease),transform .22s var(--ease),color .22s var(--ease);
}
.to-top svg{width:20px;height:20px}
.to-top:hover{background:var(--aurora-400);color:var(--ink-900);transform:translateY(-3px)}

/* ---------- Mobile tabbar ---------- */
.tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:#fff;border-top:1px solid var(--line-soft);
  box-shadow:0 -6px 18px rgba(34,20,70,.08);
  padding:6px 4px calc(6px + env(safe-area-inset-bottom));
}
.tabbar a{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;
  font-size:11px;color:var(--ink-500);padding:4px 0;border-radius:12px;
}
.tabbar a .t-icon{
  width:40px;height:26px;display:grid;place-items:center;border-radius:999px;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.tabbar a svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7}
.tabbar a[aria-current="page"]{color:var(--brand-600);font-weight:700}
.tabbar a[aria-current="page"] .t-icon{background:rgba(55,224,196,.12);color:var(--brand-600)}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .spec-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1024px){
  .container{padding:0 24px}
  .main-nav{display:none}
  .nav-cta{margin-left:auto}
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .alt-row{gap:36px}
  .faq-wrap{grid-template-columns:1fr;gap:32px}
  .consult-grid{grid-template-columns:1fr;gap:32px}
  .quote-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:768px){
  body{padding-bottom:76px}
  .section{padding:52px 0}
  .section-tight{padding:44px 0}
  .tabbar{display:flex}
  .page-head{padding:32px 0 52px}
  .page-lead{font-size:16px}
  .head-actions .btn{width:100%}
  .alt-row{grid-template-columns:1fr;gap:20px}
  .alt-row:nth-child(even) .alt-media{order:0}
  .alt-rows{gap:44px}
  .alt-num{font-size:46px;left:14px}
  .flow-strip{grid-template-columns:1fr;padding:22px;gap:16px}
  .flow-step + .flow-step::before{display:none}
  .quote-grid{grid-template-columns:1fr}
  .spec-grid{grid-template-columns:1fr}
  .form-card{padding:24px}
  .field-row{grid-template-columns:1fr}
  .cta-bar{padding:40px 0}
  .cta-inner .btn{width:100%}
  .footer-grid{padding-bottom:32px}
  .footer-bottom{justify-content:center;text-align:center}
  .site-footer{padding-bottom:calc(12px + env(safe-area-inset-bottom))}
}
@media (max-width:480px){
  .container{padding:0 18px}
  .nav-wrap{gap:12px}
  .brand-text strong{font-size:14px}
  .head-meta .chip-soft{font-size:12px;padding:5px 11px}
  .faq-q{font-size:16px;padding:16px 18px}
  .faq-a p{padding:0 18px 18px}
  .to-top{width:42px;height:42px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category3 */
:root{
  --ink-900:#170E33;
  --ink-700:#3A2E5C;
  --ink-500:#6E6389;
  --brand-600:#4B2A8C;
  --brand-800:#2B1A5E;
  --aurora-400:#37E0C4;
  --amber-500:#F2A93B;
  --paper-50:#F6F2EA;
  --card-00:#FFFFFF;
  --line-soft:rgba(23,14,51,.08);
  --ok:#2F9E6B;
  --warn:#D2453F;
  --grad-brand:linear-gradient(135deg,#4B2A8C 0%,#2B1A5E 48%,#17707F 100%);
  --grad-aurora:linear-gradient(120deg,#37E0C4 0%,#6FD8F0 45%,#9C7BF0 100%);
  --grad-amber:linear-gradient(120deg,#F7C46A 0%,#F2A93B 100%);
  --sh-1:0 6px 18px rgba(34,20,70,.06);
  --sh-2:0 18px 44px rgba(34,20,70,.12);
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --pill:999px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--paper-50);
  text-align:left;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:0;line-height:1.25}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font:inherit;color:var(--ink-900)}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px}
::selection{background:rgba(55,224,196,.28)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,242,234,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.nav-wrap{display:flex;align-items:center;gap:32px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:34px;height:34px;border-radius:11px;background:var(--grad-brand);display:grid;place-items:center;flex-shrink:0}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;font-weight:800;color:var(--ink-900);letter-spacing:0}
.brand-text small{font-size:11px;color:var(--ink-500);letter-spacing:.14em;margin-top:3px}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.main-nav a{position:relative;font-size:15px;color:var(--ink-700);padding:7px 0;transition:color .2s var(--ease)}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;
  background:var(--aurora-400);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.main-nav a:hover{color:var(--brand-600)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a[aria-current="page"]{color:var(--brand-600);font-weight:700}
.main-nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav-cta{flex-shrink:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--pill);
  font-size:15px;font-weight:600;letter-spacing:0;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);box-shadow:var(--sh-1)}
.btn-primary:disabled{background:#C9C3D6;color:#fff;cursor:not-allowed;transform:none;box-shadow:none;filter:none}
.btn-ghost{background:var(--card-00);border:1.5px solid rgba(75,42,140,.35);color:var(--brand-600)}
.btn-ghost:hover{border-color:var(--brand-600);background:rgba(75,42,140,.05);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0);background:rgba(75,42,140,.09)}
.btn-light{background:rgba(255,255,255,.12);border:1.5px solid rgba(255,255,255,.55);color:#fff}
.btn-light:hover{background:rgba(255,255,255,.22);transform:translateY(-2px)}
.btn-light:active{transform:translateY(0);background:rgba(255,255,255,.3)}
.btn-sm{height:42px;padding:0 18px;font-size:14px}

/* ---------- 页面头部 ---------- */
.page-hero{position:relative;overflow:hidden;background:var(--grad-brand);color:#fff;padding:38px 0 72px}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:url(/assets/images/backpic/back-1.png) center right/cover no-repeat;
  opacity:.42;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(23,14,51,.88) 0%,rgba(23,14,51,.62) 58%,rgba(23,14,51,.34) 100%);
}
.page-hero > .container{position:relative;z-index:2}
.hero-line{
  position:absolute;right:-8%;bottom:16%;width:58%;height:2px;z-index:1;
  background:var(--grad-aurora);transform:rotate(-6deg);opacity:.75;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:26px}
.breadcrumb a{color:rgba(255,255,255,.72);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--aurora-400)}
.breadcrumb .dot{opacity:.5}
.breadcrumb .now{color:#fff}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
  padding:6px 14px;border-radius:var(--pill);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  color:#fff;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--aurora-400);display:inline-block}
.page-hero h1{
  margin-top:20px;color:#fff;
  font-size:clamp(28px,3.9vw,46px);font-weight:800;line-height:1.15;
  max-width:900px;
}
.hero-lead{
  margin-top:20px;max-width:780px;
  font-size:16px;line-height:1.8;color:rgba(255,255,255,.86);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}

/* ---------- 区块 ---------- */
.section{padding:88px 0}
.section + .section{padding-top:0}
.section-tight{padding:56px 0}
.section-head{max-width:780px;margin-bottom:40px}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.04em;color:var(--brand-600);
  background:rgba(75,42,140,.08);border-radius:var(--pill);padding:5px 12px;margin-bottom:16px;
}
.section-tag i{width:6px;height:6px;border-radius:50%;background:var(--aurora-400);display:inline-block}
.section-title{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.25}
.section-sub{margin-top:14px;font-size:16px;line-height:1.8;color:var(--ink-500);max-width:760px}

/* ---------- 筛选 chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.chip{
  height:40px;padding:0 18px;border-radius:var(--pill);
  background:var(--card-00);border:1px solid var(--line-soft);
  font-size:14px;color:var(--ink-700);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.chip:hover{border-color:rgba(55,224,196,.55);transform:translateY(-2px);color:var(--brand-600)}
.chip:active{transform:translateY(0)}
.chip.is-active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;font-weight:600;box-shadow:var(--sh-1)}
.chip.is-active:hover{color:#fff;border-color:var(--brand-600)}

/* ---------- 对照卡 ---------- */
.cmp-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:start}
.cmp-card{
  background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--sh-1);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.cmp-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.cmp-card.is-focus{border-color:rgba(55,224,196,.75);box-shadow:var(--sh-2)}
.cmp-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding-bottom:18px;border-bottom:1px solid var(--line-soft)}
.cmp-head h3{font-size:20px;font-weight:700;line-height:1.4}
.cmp-tag{
  flex-shrink:0;font-size:12px;letter-spacing:.04em;font-weight:600;
  color:var(--brand-600);background:rgba(75,42,140,.08);
  border-radius:var(--pill);padding:4px 10px;
}
.cmp-rows{margin-top:6px}
.cmp-row{
  display:grid;grid-template-columns:minmax(96px,40%) 1fr;gap:14px;
  padding:14px 0;border-bottom:1px solid var(--line-soft);
  font-size:14.5px;line-height:1.6;
}
.cmp-row:last-child{border-bottom:0;padding-bottom:0}
.cmp-row .k{color:var(--ink-500)}
.cmp-row .v{color:var(--ink-900);font-weight:600}
.cmp-row .v em{font-style:normal;color:var(--brand-600);font-variant-numeric:tabular-nums}
.cmp-note{
  margin-top:22px;font-size:13.5px;line-height:1.7;color:var(--ink-500);
  border-left:3px solid var(--aurora-400);padding-left:14px;
}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.step{
  position:relative;background:var(--card-00);border:1px solid var(--line-soft);
  border-radius:var(--r-md);padding:28px;box-shadow:var(--sh-1);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:14px;
  background:rgba(55,224,196,.12);color:var(--brand-600);
  font-size:17px;font-weight:800;font-variant-numeric:tabular-nums;margin-bottom:18px;
}
.step h3{font-size:20px;font-weight:700;margin-bottom:10px}
.step p{font-size:15px;line-height:1.75;color:var(--ink-700)}

/* ---------- 口径说明列表 ---------- */
.note-list{display:grid;gap:16px;max-width:900px}
.note-item{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-md);
  padding:22px 24px;box-shadow:var(--sh-1);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.note-item:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.note-ico{
  flex-shrink:0;width:40px;height:40px;border-radius:50%;
  background:rgba(55,224,196,.12);display:grid;place-items:center;color:var(--brand-600);
}
.note-ico svg{width:20px;height:20px}
.note-item h3{font-size:17px;font-weight:700;margin-bottom:6px}
.note-item p{font-size:15px;line-height:1.75;color:var(--ink-700)}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;align-items:start}
.faq-side{grid-column:span 4;position:sticky;top:96px}
.faq-side .section-sub{margin-top:14px}
.faq-list{grid-column:span 8;display:grid;gap:14px}
.faq-item{
  background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-md);
  padding:0 22px;box-shadow:var(--sh-1);
  transition:border-color .2s var(--ease),padding .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item[open]{border-color:rgba(55,224,196,.45);padding:0 26px;box-shadow:var(--sh-2)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;font-size:17px;font-weight:700;color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-600)}
.faq-sign{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;background:rgba(75,42,140,.08);
  color:var(--brand-600);font-size:18px;line-height:1;
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.faq-item[open] .faq-sign{transform:rotate(45deg);background:rgba(55,224,196,.18)}
.faq-a{padding:0 0 22px;font-size:15px;line-height:1.8;color:var(--ink-700);max-width:100%}

/* ---------- 拿不准引导条 ---------- */
.uncertain{
  display:grid;grid-template-columns:5fr 7fr;gap:0;
  background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
}
.uncertain-media{position:relative;min-height:280px;background:rgba(75,42,140,.08)}
.uncertain-media img{width:100%;height:100%;object-fit:cover}
.uncertain-body{padding:40px}
.uncertain-body h2{font-size:clamp(22px,2.2vw,28px);font-weight:700}
.uncertain-body p{margin-top:14px;font-size:15.5px;line-height:1.8;color:var(--ink-700);max-width:560px}
.uncertain-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

/* ---------- 表单 ---------- */
.consult-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;align-items:start}
.consult-side{grid-column:span 7}
.checklist{display:grid;gap:16px;margin-top:26px}
.checklist li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;line-height:1.7;color:var(--ink-700)}
.check-list-ico{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;margin-top:3px;
  background:rgba(55,224,196,.16);display:grid;place-items:center;color:#17707F;
}
.check-list-ico svg{width:13px;height:13px}
.form-card{
  grid-column:span 5;background:var(--card-00);border:1px solid var(--line-soft);
  border-radius:var(--r-lg);padding:30px;box-shadow:var(--sh-2);
}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:8px}
.field label .req{color:var(--warn);margin-left:3px}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line-soft);border-radius:var(--r-sm);
  background:#FDFBF7;padding:0 14px;height:46px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field textarea{height:auto;padding:12px 14px;line-height:1.7;resize:vertical;min-height:104px}
.field input:hover,.field select:hover,.field textarea:hover{border-color:rgba(75,42,140,.3)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--aurora-400);background:#fff;
  box-shadow:0 0 0 4px rgba(55,224,196,.15);
}
.field .hint{font-size:13px;color:var(--ink-500);margin-top:6px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.checkbox{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;line-height:1.6;color:var(--ink-500)}
.checkbox input{width:16px;height:16px;margin-top:3px;accent-color:var(--brand-600);flex-shrink:0}
.checkbox a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.form-card .btn{width:100%;margin-top:6px}
.form-done{
  display:none;margin-top:14px;font-size:14px;color:var(--ok);
  background:rgba(47,158,107,.09);border:1px solid rgba(47,158,107,.22);
  border-radius:var(--r-sm);padding:12px 14px;line-height:1.6;
}
.form-done.is-on{display:block}

/* ---------- 深色 CTA 窄条 ---------- */
.band-cta{background:var(--ink-900);color:#fff}
.band-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:36px 0;
}
.band-inner h2{color:#fff;font-size:clamp(20px,2.1vw,26px);font-weight:700}
.band-inner p{margin-top:8px;font-size:14.5px;color:rgba(255,255,255,.7)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.7);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:56px}
.footer-brand .brand{margin-bottom:18px}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text small{color:rgba(255,255,255,.55)}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.7);max-width:400px}
.footer-brand .contact{margin-top:18px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.62)}
.footer-brand .contact b{color:var(--aurora-400);font-variant-numeric:tabular-nums;font-weight:700}
.footer-col h4{font-size:14px;font-weight:700;color:rgba(255,255,255,.8);margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--aurora-400)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0 26px;
}
.fb-left{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13.5px;color:rgba(255,255,255,.55)}
.fb-left .sep{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.28)}
.to-top{
  width:48px;height:48px;border-radius:50%;flex-shrink:0;
  border:1.5px solid rgba(55,224,196,.55);color:var(--aurora-400);
  display:grid;place-items:center;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.to-top svg{width:20px;height:20px}
.to-top:hover{background:var(--aurora-400);color:var(--ink-900);transform:translateY(-3px)}
.to-top:active{transform:translateY(0)}

/* ---------- 移动底部 Tab ---------- */
.mobile-tab{display:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .main-nav{gap:18px}
  .main-nav a{font-size:14px}
  .hero-line{opacity:.5}
}
@media (max-width:1024px){
  .container{padding:0 24px}
  .main-nav{display:none}
  .nav-cta{margin-left:auto}
  .section{padding:72px 0}
  .section + .section{padding-top:0}
  .page-hero{padding:32px 0 60px}
  .cmp-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cmp-card:nth-child(3){grid-column:span 2}
  .steps{grid-template-columns:1fr;gap:16px}
  .faq-side{grid-column:span 5;position:static}
  .faq-list{grid-column:span 7}
  .consult-side{grid-column:span 6}
  .form-card{grid-column:span 6}
  .uncertain{grid-template-columns:1fr}
  .uncertain-media{min-height:220px;aspect-ratio:16/9}
  .uncertain-body{padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .footer-brand{grid-column:span 2}
}
@media (max-width:768px){
  .container{padding:0 18px}
  body{padding-bottom:76px}
  .nav-wrap{height:64px;gap:16px}
  .nav-cta{display:none}
  .brand-text strong{font-size:16px}
  .section{padding:52px 0}
  .section + .section{padding-top:0}
  .section-head{margin-bottom:28px}
  .page-hero{padding:26px 0 48px}
  .hero-lead{font-size:15px}
  .hero-actions .btn{flex:1 1 auto}
  .chips{gap:8px;margin-bottom:24px}
  .chip{height:36px;padding:0 14px;font-size:13.5px}
  .cmp-grid{grid-template-columns:1fr;gap:16px}
  .cmp-card:nth-child(3){grid-column:auto}
  .cmp-card{padding:22px;border-radius:var(--r-md)}
  .cmp-row{grid-template-columns:minmax(88px,42%) 1fr;font-size:14px;gap:10px}
  .step{padding:22px}
  .note-item{padding:18px;gap:12px}
  .faq-wrap{grid-template-columns:1fr}
  .faq-side,.faq-list{grid-column:auto}
  .faq-item{padding:0 18px}
  .faq-item[open]{padding:0 20px}
  .faq-item summary{font-size:16px;padding:18px 0}
  .uncertain-body{padding:24px}
  .uncertain-actions .btn{flex:1 1 auto}
  .consult-grid{grid-template-columns:1fr}
  .consult-side,.form-card{grid-column:auto}
  .form-card{padding:22px}
  .form-row{grid-template-columns:1fr}
  .band-inner{flex-direction:column;align-items:flex-start;padding:30px 0;gap:18px}
  .band-inner .btn{width:100%}
  .site-footer{padding-top:52px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding-bottom:40px}
  .footer-brand{grid-column:span 2}
  .footer-bottom{flex-direction:column;align-items:center;text-align:center;gap:16px;padding-bottom:20px}
  .fb-left{justify-content:center}
  .mobile-tab{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:90;
    height:60px;padding-bottom:env(safe-area-inset-bottom);
    background:#fff;border-top:1px solid var(--line-soft);
    box-shadow:0 -4px 18px rgba(34,20,70,.07);
  }
  .mobile-tab a{
    flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
    font-size:11px;color:var(--ink-500);line-height:1.2;
    transition:color .2s var(--ease);
  }
  .mobile-tab .tab-ico{
    width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
    transition:background .2s var(--ease),color .2s var(--ease);
  }
  .mobile-tab .tab-ico svg{width:19px;height:19px}
  .mobile-tab a[aria-current="page"]{color:var(--brand-600);font-weight:700}
  .mobile-tab a[aria-current="page"] .tab-ico{background:rgba(55,224,196,.12);color:var(--brand-600)}
  .mobile-tab a:active .tab-ico{background:rgba(55,224,196,.2)}
}
@media (max-width:480px){
  .page-hero h1{font-size:27px}
  .cmp-row .v{font-size:13.5px}
  .section-title{font-size:22px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-brand{grid-column:auto}
}

/* roulang page: category4 */
:root{
  --ink-900:#170E33;
  --ink-700:#3A2E5C;
  --ink-500:#6E6389;
  --brand-600:#4B2A8C;
  --brand-800:#2B1A5E;
  --aurora-400:#37E0C4;
  --amber-500:#F2A93B;
  --paper-50:#F6F2EA;
  --card-00:#FFFFFF;
  --line-soft:rgba(23,14,51,.08);
  --ok:#2F9E6B;
  --warn:#D2453F;
  --grad-brand:linear-gradient(135deg,#4B2A8C 0%,#2B1A5E 48%,#17707F 100%);
  --grad-aurora:linear-gradient(120deg,#37E0C4 0%,#6FD8F0 45%,#9C7BF0 100%);
  --grad-amber:linear-gradient(135deg,#F7C46A 0%,#F2A93B 100%);
  --sh-1:0 6px 18px rgba(34,20,70,.06);
  --sh-2:0 18px 44px rgba(34,20,70,.12);
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;color:var(--ink-700);
  background:var(--paper-50);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-800)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:0;line-height:1.25}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.15;font-weight:800}
h2{font-size:clamp(24px,2.6vw,34px);font-weight:700}
h3{font-size:20px;font-weight:700;line-height:1.4}
p{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,242,234,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:36px;height:36px;border-radius:11px;background:var(--brand-800);display:grid;place-items:center;box-shadow:var(--sh-1)}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:800;color:var(--ink-900);letter-spacing:0}
.brand-text small{font-size:11px;color:var(--ink-500);letter-spacing:.08em}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:auto}
.main-nav a{
  position:relative;font-size:15px;font-weight:600;color:var(--ink-700);
  padding:6px 0;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:3px;border-radius:3px;
  background:var(--aurora-400);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.main-nav a:hover{color:var(--brand-600)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a[aria-current="page"]{color:var(--brand-600)}
.main-nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav-cta{margin-left:8px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:999px;border:1.5px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .22s cubic-bezier(.2,.7,.3,1),filter .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease;
}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:var(--sh-2);color:#fff}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{background:#fff;border-color:rgba(75,42,140,.35);color:var(--brand-600)}
.btn-ghost:hover{border-color:var(--brand-600);background:rgba(75,42,140,.05);color:var(--brand-800);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-light{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.55);color:#fff}
.btn-light:hover{background:rgba(255,255,255,.2);color:#fff;transform:translateY(-2px)}
.btn-sm{height:42px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn[disabled]{background:rgba(23,14,51,.18);color:rgba(23,14,51,.45);cursor:not-allowed;box-shadow:none;transform:none;border-color:transparent}

/* ---------- badges & tags ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;font-size:12px;letter-spacing:.04em;font-weight:600;
  background:rgba(75,42,140,.08);color:var(--brand-600);
}
.badge-aurora{background:rgba(55,224,196,.16);color:#146B5F}
.badge-amber{background:var(--grad-amber);color:var(--ink-900)}
.badge-light{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.35)}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ok);display:inline-block}
.dot-warn{background:var(--warn)}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;color:#fff;
  padding:32px 0 80px;
  background-image:linear-gradient(135deg,rgba(75,42,140,.95),rgba(43,26,94,.94) 48%,rgba(23,112,127,.92)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;right:-80px;bottom:-40px;width:420px;height:2px;
  background:var(--grad-aurora);transform:rotate(-12deg);opacity:.85;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:26px}
.crumbs a{color:rgba(255,255,255,.82)}
.crumbs a:hover{color:var(--aurora-400)}
.crumbs span.current{color:#fff;font-weight:600}
.crumbs i{font-size:10px;opacity:.6}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center}
.hero-copy h1{color:#fff;margin:16px 0 18px}
.hero-copy h1 em{font-style:normal;color:var(--aurora-400)}
.hero-lead{font-size:17px;line-height:1.85;color:rgba(255,255,255,.86);max-width:640px;text-align:left}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;font-size:14px;color:rgba(255,255,255,.82)}
.hero-points li{display:flex;align-items:center;gap:8px}
.hero-points i{color:var(--aurora-400);font-size:13px}
.hero-visual{position:relative}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-2);background:rgba(255,255,255,.1)}
.float-card{
  position:absolute;left:-18px;bottom:18px;background:rgba(255,255,255,.94);
  border-radius:var(--r-md);padding:14px 18px;box-shadow:var(--sh-2);
  border-left:3px solid var(--amber-500);min-width:180px;
}
.float-card b{display:block;font-size:24px;font-weight:800;color:var(--ink-900);font-variant-numeric:tabular-nums;line-height:1.2}
.float-card span{font-size:12px;color:var(--ink-500)}

/* ---------- section shell ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-head .badge{margin-bottom:14px}
.section-head p{margin-top:14px;color:var(--ink-500);font-size:16px;line-height:1.8}
.eyebrow{font-size:12px;letter-spacing:.14em;color:var(--brand-600);font-weight:700;text-transform:uppercase}

/* ---------- steps ---------- */
.steps-wrap{position:relative;margin-top:12px}
.steps{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.steps::before{
  content:"";position:absolute;top:19px;left:6%;right:6%;height:2px;border-radius:2px;
  background:linear-gradient(90deg,rgba(55,224,196,.6),rgba(75,42,140,.18));
}
.step{position:relative;display:block}
.step-dot{
  position:relative;z-index:1;width:38px;height:38px;border-radius:50%;
  background:#fff;border:2px solid rgba(75,42,140,.2);color:var(--brand-600);
  display:grid;place-items:center;font-weight:800;font-size:14px;font-variant-numeric:tabular-nums;
  transition:all .22s ease;
}
.step.is-active .step-dot{background:var(--aurora-400);border-color:var(--aurora-400);color:#08322B;box-shadow:0 0 0 6px rgba(55,224,196,.16)}
.step.is-done .step-dot{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.step-body{background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-md);padding:20px;margin-top:16px;box-shadow:var(--sh-1);transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease,border-color .22s ease}
.step-body:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.step-body h3{font-size:17px;margin-bottom:8px}
.step-body p{font-size:14px;color:var(--ink-500);line-height:1.7}
.step-meta{margin-top:12px;font-size:12px;color:var(--brand-600);font-weight:600;letter-spacing:.04em;display:flex;align-items:center;gap:6px}
.steps-note{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;font-size:14px;color:var(--ink-500);background:rgba(55,224,196,.07);border:1px dashed rgba(55,224,196,.5);border-radius:var(--r-md);padding:16px 20px}
.steps-note i{color:var(--brand-600)}

/* ---------- promise grid ---------- */
.promise-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.promise-card{
  background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--sh-1);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease,border-color .22s ease;
}
.promise-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(55,224,196,.45)}
.promise-icon{
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:rgba(55,224,196,.12);color:#0F7A6B;font-size:18px;margin-bottom:18px;
}
.promise-card h3{margin-bottom:10px}
.promise-card p{font-size:15px;color:var(--ink-500);line-height:1.8}
.promise-list{margin-top:16px;display:grid;gap:8px}
.promise-list li{position:relative;padding-left:22px;font-size:14px;color:var(--ink-700)}
.promise-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:var(--aurora-400);
}

/* ---------- dark band ---------- */
.dark-band{background:var(--ink-900);color:rgba(255,255,255,.78);padding:72px 0;position:relative;overflow:hidden}
.dark-band::before{
  content:"";position:absolute;top:-120px;right:-100px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(55,224,196,.18),transparent 70%);
}
.dark-band h2{color:#fff;max-width:620px}
.dark-band .section-head p{color:rgba(255,255,255,.72)}
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px}
.metric{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-md);padding:22px;transition:background .22s ease,transform .22s ease;
}
.metric:hover{background:rgba(255,255,255,.1);transform:translateY(-3px)}
.metric b{display:block;font-size:30px;font-weight:800;color:#fff;font-variant-numeric:tabular-nums;line-height:1.15}
.metric b small{font-size:14px;font-weight:600;margin-left:4px;color:var(--aurora-400)}
.metric span{display:block;margin-top:8px;font-size:13px;color:rgba(255,255,255,.68);line-height:1.6}

/* ---------- split block ---------- */
.split{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center}
.split-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-2);background:rgba(75,42,140,.08)}
.split-copy h2{margin-bottom:16px}
.split-copy p{color:var(--ink-500);line-height:1.85}
.check-list{margin-top:22px;display:grid;gap:14px}
.check-list li{display:grid;grid-template-columns:24px 1fr;gap:12px;align-items:start;font-size:15px}
.check-list i{color:var(--aurora-400);font-size:16px;margin-top:4px}
.check-list b{color:var(--ink-900);display:block;margin-bottom:2px}
.check-list span{color:var(--ink-500);font-size:14px}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-intro p{margin-top:14px;color:var(--ink-500);line-height:1.8}
.faq-intro .btn{margin-top:24px}
.faq-list{display:grid;gap:14px}
.faq-item{background:var(--card-00);border:1px solid var(--line-soft);border-radius:var(--r-md);transition:border-color .22s ease,padding .22s ease,box-shadow .22s ease}
.faq-item.is-open{border-color:rgba(55,224,196,.45);padding:4px;box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;padding:18px 20px;text-align:left;cursor:pointer;
  font-size:17px;font-weight:700;color:var(--ink-900);line-height:1.5;
}
.faq-q:hover{color:var(--brand-600)}
.faq-q .sign{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1.5px solid rgba(75,42,140,.3);
  display:grid;place-items:center;color:var(--brand-600);font-size:14px;
  transition:transform .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
}
.faq-item.is-open .faq-q .sign{transform:rotate(45deg);background:var(--brand-600);color:#fff;border-color:var(--brand-600)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--ink-700);max-width:100%}

/* ---------- cta bar ---------- */
.cta-bar{background:var(--grad-brand);color:#fff;padding:48px 0;position:relative;overflow:hidden}
.cta-bar::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--grad-aurora);
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:#fff;font-size:clamp(22px,2.4vw,30px);margin-bottom:8px}
.cta-inner p{color:rgba(255,255,255,.82);font-size:15px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand-text strong{color:#fff}
.footer-brand .brand-text small{color:rgba(255,255,255,.5)}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:360px}
.footer-brand .contact{margin-top:18px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.62)}
.footer-brand .contact b{color:#fff;font-variant-numeric:tabular-nums}
.footer-col h4{font-size:14px;font-weight:700;color:rgba(255,255,255,.86);margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7)}
.footer-col a:hover{color:var(--aurora-400)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.55);
}
.fb-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.fb-left .sep{width:1px;height:12px;background:rgba(255,255,255,.2)}
.to-top{
  width:48px;height:48px;border-radius:50%;border:1.5px solid var(--aurora-400);
  display:grid;place-items:center;color:var(--aurora-400);
  transition:background .22s ease,color .22s ease,transform .22s ease;
}
.to-top svg{width:20px;height:20px}
.to-top:hover{background:var(--aurora-400);color:var(--ink-900);transform:translateY(-3px)}

/* ---------- mobile tabbar ---------- */
.tabbar{display:none}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .container{padding:0 24px}
  .main-nav{gap:16px}
  .main-nav a{font-size:14px}
  .hero-grid{gap:28px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-visual img{aspect-ratio:16/9}
  .float-card{left:16px;bottom:16px}
  .split{grid-template-columns:1fr;gap:32px}
  .faq-grid{grid-template-columns:1fr;gap:28px}
  .metric-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
  .steps{grid-template-columns:repeat(3,1fr)}
  .steps::before{display:none}
}
@media (max-width:900px){
  .main-nav{display:none}
  .nav-cta{margin-left:auto}
  .tabbar{
    position:fixed;left:0;right:0;bottom:0;z-index:90;
    display:flex;align-items:stretch;justify-content:space-around;
    height:60px;padding-bottom:env(safe-area-inset-bottom);
    background:#fff;border-top:1px solid var(--line-soft);
    box-shadow:0 -6px 20px rgba(34,20,70,.06);
  }
  .tabbar a{
    flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:11px;color:var(--ink-500);font-weight:600;
  }
  .tabbar a .ico{
    width:28px;height:28px;border-radius:50%;display:grid;place-items:center;
    font-size:14px;transition:background .2s ease,color .2s ease;
  }
  .tabbar a.active{color:var(--brand-600)}
  .tabbar a.active .ico{background:rgba(55,224,196,.12);color:var(--brand-600)}
  body{padding-bottom:76px}
  .site-footer{padding-bottom:calc(28px + 8px)}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:52px 0}
  .section-tight{padding:44px 0}
  .page-hero{padding:22px 0 56px}
  .hero-lead{font-size:16px}
  .hero-actions .btn{flex:1 1 auto;height:44px;font-size:14px}
  .steps{grid-template-columns:1fr;gap:0}
  .steps-wrap{margin-top:0}
  .steps::before{
    display:block;top:8px;bottom:8px;left:18px;right:auto;width:2px;height:auto;
    background:linear-gradient(180deg,rgba(55,224,196,.6),rgba(75,42,140,.18));
  }
  .step{display:grid;grid-template-columns:38px 1fr;gap:16px;padding-bottom:20px}
  .step-dot{grid-column:1}
  .step-body{grid-column:2;margin-top:0;padding:18px}
  .promise-grid{grid-template-columns:1fr;gap:16px}
  .promise-card{padding:20px}
  .metric-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .metric b{font-size:24px}
  .faq-q{font-size:16px;padding:16px}
  .faq-a p{padding:0 16px 16px}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:center;text-align:center;gap:14px}
  .fb-left{justify-content:center}
}
@media (max-width:480px){
  .brand-text strong{font-size:15px}
  .nav-cta{height:40px;padding:0 14px;font-size:13px}
  .float-card{padding:10px 14px;min-width:150px}
  .float-card b{font-size:20px}
  .metric-grid{grid-template-columns:1fr 1fr}
  .hero-points{font-size:13px;gap:8px 16px}
}

/* roulang page: category5 */
:root{
  --ink-900:#170E33;
  --ink-700:#3A2E5C;
  --ink-500:#6E6389;
  --brand-600:#4B2A8C;
  --brand-800:#2B1A5E;
  --aurora-400:#37E0C4;
  --amber-500:#F2A93B;
  --paper-50:#F6F2EA;
  --card-00:#FFFFFF;
  --line-soft:rgba(23,14,51,.08);
  --ok:#2F9E6B;
  --warn:#D2453F;
  --grad-brand:linear-gradient(135deg,#4B2A8C 0%,#2B1A5E 48%,#17707F 100%);
  --grad-aurora:linear-gradient(120deg,#37E0C4 0%,#6FD8F0 45%,#9C7BF0 100%);
  --grad-amber:linear-gradient(180deg,#F7C46A 0%,#F2A93B 100%);
  --sh-1:0 6px 18px rgba(34,20,70,.06);
  --sh-2:0 18px 44px rgba(34,20,70,.12);
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper-50);
  color:var(--ink-700);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
  text-align:left;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-800)}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:0;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--aurora-400);outline-offset:2px;border-radius:6px}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
.section{padding:96px 0}
.section-sm{padding:64px 0}
.section-title{
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.25;
  font-weight:700;
  margin-bottom:14px;
}
.section-lead{
  color:var(--ink-500);
  font-size:16px;
  max-width:780px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.04em;
  font-weight:700;
  color:var(--brand-600);
  background:rgba(75,42,140,.08);
  border-radius:999px;
  padding:5px 12px;
  margin-bottom:16px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,242,234,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:38px;
  height:38px;
  border-radius:12px;
  background:var(--grad-brand);
  display:grid;
  place-items:center;
  box-shadow:0 4px 12px rgba(43,26,94,.28);
  flex-shrink:0;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;font-weight:800;color:var(--ink-900);letter-spacing:0}
.brand-text small{font-size:12px;color:var(--ink-500);letter-spacing:.04em;font-weight:500}
.main-nav{
  display:flex;
  align-items:center;
  gap:26px;
  font-size:15px;
}
.main-nav a{
  position:relative;
  color:var(--ink-700);
  padding:6px 0;
  white-space:nowrap;
  font-weight:500;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  height:3px;
  width:0;
  border-radius:3px;
  background:var(--aurora-400);
  transition:width .2s var(--ease);
}
.main-nav a:hover{color:var(--brand-600)}
.main-nav a:hover::after{width:100%}
.main-nav a[aria-current="page"]{color:var(--brand-600);font-weight:700}
.main-nav a[aria-current="page"]::after{width:100%}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:999px;
  border:1.5px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:transform .22s var(--ease),filter .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--grad-brand);
  color:#fff;
  box-shadow:0 8px 20px rgba(43,26,94,.22);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:var(--sh-2);color:#fff}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{
  background:#fff;
  color:var(--brand-600);
  border-color:rgba(75,42,140,.35);
}
.btn-ghost:hover{background:rgba(75,42,140,.05);border-color:var(--brand-600);color:var(--brand-800)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn:disabled,.btn[aria-disabled="true"]{background:rgba(110,99,137,.3);color:rgba(255,255,255,.85);cursor:not-allowed;box-shadow:none;transform:none;filter:none}
.nav-cta{flex-shrink:0}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  background:var(--grad-brand);
  color:#fff;
  padding:46px 0 64px;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:url(/assets/images/backpic/back-2.webp) center/cover no-repeat;
  opacity:.34;
}
.page-hero::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--grad-aurora);
  opacity:.85;
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:rgba(255,255,255,.72);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.breadcrumb a{color:rgba(255,255,255,.82)}
.breadcrumb a:hover{color:var(--aurora-400)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:#fff;font-weight:600}
.hero-grid{
  display:grid;
  grid-template-columns:1.55fr .95fr;
  gap:48px;
  align-items:end;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  letter-spacing:.04em;
  font-weight:600;
  color:#fff;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.22);
  border-radius:999px;
  padding:5px 13px;
  margin-bottom:18px;
}
.hero-tag .dot{width:7px;height:7px;border-radius:50%;background:var(--aurora-400);box-shadow:0 0 0 4px rgba(55,224,196,.18)}
.page-hero h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.15;
  font-weight:800;
  color:#fff;
  margin-bottom:18px;
}
.hero-intro{
  font-size:17px;
  line-height:1.85;
  color:rgba(255,255,255,.86);
  max-width:760px;
}
.hero-aside{
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);
  border-radius:var(--r-lg);
  padding:24px;
  backdrop-filter:blur(4px);
}
.hero-aside h3{color:#fff;font-size:16px;margin-bottom:10px}
.hero-aside p{font-size:14px;color:rgba(255,255,255,.78);line-height:1.7}
.hero-aside .btn{margin-top:18px;width:100%}
.hero-aside .btn-primary{background:#fff;color:var(--brand-800);box-shadow:none}
.hero-aside .btn-primary:hover{background:#fff;color:var(--brand-800);filter:none}

/* ---------- quick facts ---------- */
.facts{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  margin-top:-38px;
  position:relative;
  z-index:2;
}
.fact-card{
  background:rgba(255,255,255,.94);
  border:1px solid var(--line-soft);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:16px 18px;
  border-left:3px solid var(--amber-500);
}
.fact-card .num{
  font-size:24px;
  font-weight:800;
  color:var(--ink-900);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.fact-card .num span{font-size:14px;font-weight:700;color:var(--ink-500);margin-left:2px}
.fact-card .note{font-size:12.5px;color:var(--ink-500);margin-top:4px;line-height:1.5}

/* ---------- main two column ---------- */
.doc-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:32px;
  align-items:start;
}
.panel-head{margin-bottom:26px}
.faq-item{
  background:var(--card-00);
  border:1px solid var(--line-soft);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-item:hover{border-color:rgba(75,42,140,.22)}
.faq-item.open{border-color:rgba(55,224,196,.42);box-shadow:var(--sh-2)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:18px 20px;
  background:none;
  border:0;
  text-align:left;
  font-size:17px;
  font-weight:700;
  color:var(--ink-900);
  cursor:pointer;
  transition:padding .22s var(--ease),color .22s var(--ease);
}
.faq-q:hover{color:var(--brand-600)}
.faq-item.open .faq-q{padding:22px 24px 12px}
.faq-icon{
  flex-shrink:0;
  width:22px;height:22px;
  position:relative;
  transition:transform .28s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--brand-600);
  border-radius:2px;
}
.faq-icon::before{left:0;top:10px;width:22px;height:2px}
.faq-icon::after{left:10px;top:0;width:2px;height:22px;transition:opacity .28s var(--ease)}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-item.open .faq-icon::before{background:var(--aurora-400)}
.faq-item.open .faq-icon::after{background:var(--aurora-400)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-a p{
  padding:0 24px 22px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-700);
}
.faq-a p b{color:var(--ink-900);font-weight:700}

/* ---------- download list ---------- */
.dl-aside{
  background:var(--card-00);
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:26px;
}
.dl-aside h2{font-size:22px;margin-bottom:8px}
.dl-aside .aside-lead{font-size:14px;color:var(--ink-500);margin-bottom:20px}
.dl-item{
  display:flex;
  align-items:center;
  gap:13px;
  padding:13px 14px;
  border:1px solid var(--line-soft);
  border-radius:var(--r-md);
  background:#fff;
  margin-bottom:11px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.dl-item:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-2);
  border-color:rgba(55,224,196,.45);
}
.dl-ico{
  width:40px;height:40px;
  flex-shrink:0;
  border-radius:50%;
  background:rgba(55,224,196,.12);
  display:grid;
  place-items:center;
  color:var(--brand-800);
  font-size:11px;
  font-weight:800;
  letter-spacing:.02em;
}
.dl-body{min-width:0;flex:1}
.dl-body h4{font-size:14.5px;font-weight:700;line-height:1.4;margin-bottom:4px}
.dl-meta{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--ink-500);flex-wrap:wrap}
.fmt{
  display:inline-block;
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--brand-600);
  background:rgba(75,42,140,.08);
  border-radius:999px;
  padding:2px 8px;
}
.dl-arrow{
  flex-shrink:0;
  width:22px;height:22px;
  color:var(--brand-600);
  transition:transform .22s var(--ease);
}
.dl-item:hover .dl-arrow{transform:translateX(4px)}
.dl-note{
  margin-top:16px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--ink-500);
  background:rgba(75,42,140,.04);
  border-radius:var(--r-sm);
  padding:12px 14px;
}
.aside-cta{
  margin-top:18px;
  background:var(--grad-brand);
  border-radius:var(--r-md);
  padding:22px;
  color:#fff;
}
.aside-cta h3{color:#fff;font-size:17px;margin-bottom:6px}
.aside-cta p{font-size:13px;color:rgba(255,255,255,.8);line-height:1.65;margin-bottom:14px}
.aside-cta .btn{width:100%;background:#fff;color:var(--brand-800);box-shadow:none}
.aside-cta .btn:hover{background:#fff;color:var(--brand-800);filter:none;transform:translateY(-2px)}

/* ---------- consult ---------- */
.consult{
  background:linear-gradient(180deg,#EFE9DE 0%,var(--paper-50) 100%);
  border-top:1px solid var(--line-soft);
}
.consult-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:44px;
  align-items:start;
}
.consult-figure{
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--sh-1);
  margin-bottom:24px;
  aspect-ratio:16/9;
  background:rgba(75,42,140,.08);
}
.consult-figure img{width:100%;height:100%;object-fit:cover}
.point-list{margin-top:22px;display:grid;gap:14px}
.point-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:15px;
  line-height:1.7;
  color:var(--ink-700);
}
.point-list li .tick{
  flex-shrink:0;
  width:22px;height:22px;
  margin-top:2px;
  border-radius:50%;
  background:rgba(55,224,196,.18);
  color:#17707F;
  display:grid;
  place-items:center;
  font-size:12px;
  font-weight:800;
}
.form-card{
  background:var(--card-00);
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-2);
  padding:28px;
}
.form-card h3{font-size:20px;margin-bottom:6px}
.form-card .form-lead{font-size:13.5px;color:var(--ink-500);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{
  display:block;
  font-size:13.5px;
  font-weight:600;
  color:var(--ink-900);
  margin-bottom:6px;
}
.field label .req{color:var(--warn);margin-left:2px}
.field input,.field select,.field textarea{
  width:100%;
  height:46px;
  padding:0 14px;
  font-size:14.5px;
  font-family:inherit;
  color:var(--ink-900);
  background:#fff;
  border:1px solid var(--line-soft);
  border-radius:var(--r-sm);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  appearance:none;
}
.field textarea{height:auto;min-height:96px;padding:12px 14px;line-height:1.7;resize:vertical}
.field select{
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236E6389' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:38px;
}
.field input::placeholder,.field textarea::placeholder{color:#A79FBB}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--aurora-400);
  box-shadow:0 0 0 4px rgba(55,224,196,.15);
}
.field.has-error input,.field.has-error select{border-color:var(--warn)}
.err-msg{display:none;font-size:13px;color:var(--warn);margin-top:6px}
.field.has-error .err-msg{display:block}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.check-line{display:flex;align-items:flex-start;gap:9px;font-size:13px;color:var(--ink-500);line-height:1.6;margin:6px 0 18px}
.check-line input{width:16px;height:16px;margin-top:3px;accent-color:var(--brand-600);flex-shrink:0}
.submit-btn{width:100%}
.form-ok{
  display:none;
  margin-top:14px;
  font-size:13.5px;
  color:var(--ok);
  background:rgba(47,158,107,.1);
  border-radius:var(--r-sm);
  padding:10px 14px;
}
.form-ok.show{display:block}

/* ---------- cta band ---------- */
.cta-band{padding:0 0 96px}
.cta-inner{
  background:var(--ink-900);
  border-radius:var(--r-lg);
  padding:34px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  box-shadow:var(--sh-2);
  position:relative;
  overflow:hidden;
}
.cta-inner::after{
  content:"";
  position:absolute;
  right:-40px;top:-40px;
  width:220px;height:220px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(55,224,196,.22),transparent 68%);
}
.cta-inner h2{
  color:#fff;
  font-size:clamp(20px,2.2vw,26px);
  line-height:1.3;
  margin-bottom:6px;
  position:relative;
}
.cta-inner p{color:rgba(255,255,255,.72);font-size:14.5px;position:relative}
.cta-inner .btn{position:relative;flex-shrink:0}
.cta-inner .btn-primary{background:var(--grad-amber);color:var(--ink-900);box-shadow:none}
.cta-inner .btn-primary:hover{color:var(--ink-900);filter:brightness(1.04)}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.7);
  padding:64px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.site-footer .brand-text strong{color:#fff}
.site-footer .brand-text small{color:rgba(255,255,255,.6)}
.footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.66);
  margin:16px 0 14px;
  max-width:420px;
}
.footer-brand .contact{font-size:14px;line-height:1.9;color:rgba(255,255,255,.66)}
.footer-brand .contact b{color:#fff;font-weight:700;font-variant-numeric:tabular-nums}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:rgba(255,255,255,.82);
  margin-bottom:14px;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:rgba(255,255,255,.7)}
.footer-col ul li a:hover{color:var(--aurora-400)}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding-top:22px;
  flex-wrap:wrap;
}
.fb-left{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.55);
}
.fb-left .sep{width:1px;height:12px;background:rgba(255,255,255,.2)}
.to-top{
  width:48px;height:48px;
  border-radius:50%;
  border:1.5px solid rgba(55,224,196,.55);
  display:grid;
  place-items:center;
  color:var(--aurora-400);
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
  flex-shrink:0;
}
.to-top svg{width:20px;height:20px}
.to-top:hover{background:var(--aurora-400);color:var(--ink-900);transform:translateY(-2px)}

/* ---------- mobile tabs ---------- */
.mobile-tabs{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:70;
  height:60px;
  padding-bottom:env(safe-area-inset-bottom);
  background:#fff;
  border-top:1px solid var(--line-soft);
  box-shadow:0 -6px 20px rgba(34,20,70,.08);
}
.tab-item{
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:11px;
  color:var(--ink-500);
  text-decoration:none;
  padding:6px 2px;
  transition:color .2s var(--ease);
}
.tab-item .ico{
  width:26px;height:26px;
  display:grid;
  place-items:center;
  border-radius:50%;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.tab-item .ico svg{width:17px;height:17px}
.tab-item.active{color:var(--brand-600);font-weight:700}
.tab-item.active .ico{background:rgba(55,224,196,.12);color:var(--brand-600)}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .main-nav{gap:18px;font-size:14px}
  .container{padding:0 28px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .hero-grid{grid-template-columns:1fr;gap:30px;align-items:start}
  .hero-aside{max-width:520px}
  .facts{grid-template-columns:repeat(2,1fr)}
  .doc-grid{grid-template-columns:1fr;gap:36px}
  .consult-grid{grid-template-columns:1fr;gap:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:30px}
}
@media (max-width:900px){
  .main-nav{gap:14px;font-size:13.5px;overflow-x:auto;scrollbar-width:none}
  .main-nav::-webkit-scrollbar{display:none}
  .nav-cta{display:none}
}
@media (max-width:768px){
  body{padding-bottom:76px}
  .container{padding:0 18px}
  .nav-wrap{height:64px;gap:12px}
  .main-nav{display:none}
  .section{padding:52px 0}
  .section-sm{padding:44px 0}
  .page-hero{padding:32px 0 52px}
  .hero-intro{font-size:15.5px}
  .facts{grid-template-columns:1fr 1fr;gap:12px;margin-top:-28px}
  .fact-card{padding:13px 14px}
  .fact-card .num{font-size:20px}
  .fact-card .note{font-size:11.5px}
  .dl-aside{padding:20px}
  .faq-q{font-size:15.5px;padding:16px 16px}
  .faq-item.open .faq-q{padding:18px 16px 10px}
  .faq-a p{padding:0 16px 18px;font-size:14.5px}
  .form-card{padding:20px}
  .form-row{grid-template-columns:1fr;gap:0}
  .cta-band{padding-bottom:52px}
  .cta-inner{padding:24px 20px}
  .cta-inner .btn{width:100%}
  .mobile-tabs{display:flex}
  .site-footer{padding:48px 0 22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;padding-bottom:28px}
  .footer-brand{grid-column:1 / -1}
  .footer-bottom{justify-content:center;text-align:center;flex-direction:column-reverse}
  .fb-left{justify-content:center;font-size:12px}
}
@media (max-width:480px){
  .brand-text strong{font-size:15px}
  .brand-mark{width:34px;height:34px}
  .facts{grid-template-columns:1fr 1fr}
  .fact-card .num{font-size:18px}
  .fact-card .num span{font-size:12px}
  .tab-item{font-size:10px}
  .breadcrumb{font-size:13px}
}