/* roulang page: index */
/* ===== 设计变量 ===== */
:root{
  --brand:#0B4F45;
  --brand-deep:#073A33;
  --ink-bg:#0A2622;
  --accent:#C9F24D;
  --bg:#F7F6F2;
  --surface:#FFFFFF;
  --surface-2:#EFEDE7;
  --line:#E2DFD6;
  --text:#12181A;
  --text-muted:#5C6663;
  --text-invert:#F3F6F4;
  --danger:#C0442B;
  --success:#1F7A5A;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,24,26,.06);
  --sh-2:0 8px 24px -12px rgba(16,24,26,.18);
  --sh-3:0 24px 60px -20px rgba(10,38,34,.35);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-latin:"Inter","Space Grotesk",system-ui,sans-serif;
  --ease:cubic-bezier(.2,.8,.2,1);
  --nav-h:72px;
}
/* ===== reset ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;font-family:var(--font-cn);font-size:16px;line-height:1.75;color:var(--text);background:var(--bg);}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid rgba(11,79,69,.55);outline-offset:2px;border-radius:4px;}
/* ===== 容器 ===== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:104px 0;}
.section--tight{padding:72px 0;}
.section--dark{background:var(--ink-bg);color:var(--text-invert);}
.section--surface{background:var(--surface);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;}
.sec-title{font-size:38px;line-height:1.15;font-weight:800;letter-spacing:-.02em;position:relative;padding-left:20px;}
.sec-title::before{content:"";position:absolute;left:0;top:.28em;width:6px;height:calc(100% - .56em);background:var(--brand);border-radius:3px;}
.section--dark .sec-title::before{background:var(--accent);}
.sec-desc{color:var(--text-muted);font-size:16px;max-width:560px;margin-top:12px;}
.section--dark .sec-desc{color:rgba(243,246,244,.72);}
.link-more{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:600;font-size:15px;white-space:nowrap;}
.link-more svg{transition:transform .2s var(--ease);}
.link-more:hover svg{transform:translateX(4px);}
.section--dark .link-more{color:var(--accent);}
/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:all .22s var(--ease);}
.btn--primary{background:var(--brand);color:var(--text-invert);}
.btn--primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text);}
.btn--ghost:hover{border-color:var(--brand);background:var(--surface-2);}
.btn--accent{background:var(--accent);color:var(--ink-bg);}
.btn--accent:hover{filter:brightness(.94);transform:translateY(-1px);box-shadow:0 10px 24px -12px rgba(201,242,77,.8);}
.btn--block{width:100%;}
.btn[disabled]{opacity:.4;cursor:not-allowed;}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;letter-spacing:.06em;background:rgba(11,79,69,.09);color:var(--brand);font-weight:600;}
.tag{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);font-size:13px;color:var(--text-muted);}
/* ===== 头部导航 ===== */
.site-header{position:sticky;top:0;z-index:60;background:rgba(247,246,242,.86);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:all .25s var(--ease);}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--sh-1);}
.nav{display:flex;align-items:center;gap:28px;height:var(--nav-h);transition:height .25s var(--ease);}
.site-header.is-scrolled .nav{height:60px;}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.01em;white-space:nowrap;}
.logo-mark{width:30px;height:30px;border-radius:8px;background:var(--brand);color:var(--accent);display:grid;place-items:center;font-family:var(--font-latin);font-size:15px;font-weight:800;}
.logo-text{color:var(--text);}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-links a{position:relative;padding:8px 12px;font-size:15px;color:var(--text-muted);border-radius:8px;transition:color .2s var(--ease),background .2s var(--ease);}
.nav-links a:hover{color:var(--text);background:var(--surface-2);}
.nav-links a.active{color:var(--text);font-weight:600;}
.nav-links a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;background:var(--brand);border-radius:2px;}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search{position:relative;display:flex;align-items:center;width:250px;height:40px;border:1px solid var(--line);border-radius:10px;background:var(--surface);padding:0 10px;gap:8px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);}
.search:focus-within{border-color:var(--brand);box-shadow:var(--sh-1);}
.search svg{flex:none;color:var(--text-muted);}
.search input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:14px;}
.search input::placeholder{color:#9AA3A0;}
.kbd{font-family:var(--font-latin);font-size:12px;border:1px solid var(--line);border-radius:6px;padding:1px 6px;color:var(--text-muted);background:var(--surface-2);}
.nav-cta{height:40px;padding:0 18px;}
.burger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:var(--surface);align-items:center;justify-content:center;cursor:pointer;}
.mobile-panel{display:none;position:fixed;inset:var(--nav-h) 0 0 0;background:var(--bg);z-index:55;padding:24px;overflow-y:auto;}
.mobile-panel.open{display:block;}
.mobile-panel a{display:block;padding:16px 0;font-size:20px;font-weight:600;border-bottom:1px solid var(--line);}
.mobile-panel .btn{margin-top:24px;height:50px;}
/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;background:var(--bg);padding:88px 0 96px;}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:56px 56px;opacity:.35;mask-image:radial-gradient(circle at 70% 30%,#000,transparent 72%);pointer-events:none;}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.hero h1{font-size:58px;line-height:1.06;font-weight:800;letter-spacing:-.02em;}
.hero h1 em{font-style:normal;position:relative;color:var(--brand);}
.hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:12px;background:var(--accent);opacity:.5;z-index:-1;}
.hero-sub{margin-top:20px;font-size:17px;color:var(--text-muted);max-width:560px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:36px;}
.hero-trust{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px;}
.hero-figure{position:relative;}
.hero-figure .frame{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-2);aspect-ratio:16/10;background:var(--surface-2);}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.float-card{position:absolute;left:-18px;bottom:-22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:16px 20px;box-shadow:var(--sh-2);display:flex;align-items:center;gap:14px;}
.float-card b{font-family:var(--font-latin);font-size:26px;color:var(--brand);}
.float-card span{font-size:13px;color:var(--text-muted);line-height:1.5;}
/* ===== 痛点列表 ===== */
.ask-list{border-top:1px solid var(--line);}
.ask-item{display:grid;grid-template-columns:64px 1fr auto;align-items:center;gap:24px;padding:26px 20px 26px 0;border-bottom:1px solid var(--line);position:relative;transition:background .22s var(--ease);}
.ask-item::before{content:"";position:absolute;left:0;top:14%;bottom:14%;width:3px;background:var(--brand);border-radius:2px;transform:scaleY(0);transform-origin:center;transition:transform .25s var(--ease);}
.ask-item:hover{background:var(--surface-2);}
.ask-item:hover::before{transform:scaleY(1);}
.ask-num{font-family:var(--font-latin);font-size:20px;font-weight:700;color:var(--brand);padding-left:20px;}
.ask-body h3{font-size:20px;font-weight:600;line-height:1.35;}
.ask-body p{margin-top:6px;font-size:14px;color:var(--text-muted);}
.ask-arrow{color:var(--text-muted);transition:transform .2s var(--ease),color .2s var(--ease);}
.ask-item:hover .ask-arrow{transform:translateX(4px);color:var(--brand);}
/* ===== 方案卡 ===== */
.plan-grid{display:grid;grid-template-columns:1.25fr 1fr;grid-template-rows:auto auto;gap:24px;}
.plan-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;display:flex;flex-direction:column;gap:14px;transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);}
.plan-card:hover{border-color:var(--brand);transform:translateY(-4px);box-shadow:var(--sh-2);}
.plan-card--main{grid-row:span 2;padding:34px;}
.plan-card--main .plan-cover{border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9;background:var(--surface-2);margin-bottom:6px;}
.plan-card--main .plan-cover img{width:100%;height:100%;object-fit:cover;}
.plan-card h3{font-size:21px;font-weight:600;}
.plan-card p{font-size:15px;color:var(--text-muted);}
.plan-icon{width:44px;height:44px;border-radius:12px;background:rgba(11,79,69,.08);display:grid;place-items:center;color:var(--brand);}
.plan-link{margin-top:auto;display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:600;font-size:15px;}
.plan-link svg{transition:transform .2s var(--ease);}
.plan-card:hover .plan-link svg{transform:translateX(4px);}
/* ===== 数据区 ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:8px;border-top:1px solid rgba(243,246,244,.16);}
.stat{padding:34px 26px 30px;border-right:1px solid rgba(243,246,244,.16);}
.stat:last-child{border-right:0;}
.stat-num{font-family:var(--font-latin);font-size:56px;font-weight:800;line-height:1;color:var(--surface);position:relative;display:inline-block;}
.stat-num::after{content:"";position:absolute;left:0;bottom:-8px;width:100%;height:4px;background:var(--accent);border-radius:2px;}
.stat-num i{font-style:normal;font-size:26px;color:var(--accent);margin-left:2px;}
.stat p{margin-top:20px;font-size:14px;color:rgba(243,246,244,.72);}
/* ===== 资讯卡 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;display:flex;flex-direction:column;transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);}
.news-card:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--sh-2);}
.news-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);border-bottom:1px solid var(--line);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.02);}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.news-title{font-size:19px;font-weight:600;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s var(--ease);}
.news-card:hover .news-title{color:var(--brand);}
.news-excerpt{font-size:14px;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;font-size:13px;color:var(--text-muted);display:flex;align-items:center;gap:8px;}
.news-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--line);}
.empty-state{border:1px dashed var(--line);border-radius:var(--r-lg);padding:56px 24px;text-align:center;background:var(--surface);}
.empty-state svg{color:var(--text-muted);margin:0 auto 16px;}
.empty-state p{color:var(--text-muted);margin-bottom:20px;}
/* ===== FAQ ===== */
.faq{border-top:1px solid var(--line);max-width:920px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{width:100%;background:none;border:0;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 4px;text-align:left;font-size:18px;font-weight:600;cursor:pointer;transition:color .2s var(--ease);}
.faq-q:hover{color:var(--brand);}
.faq-icon{flex:none;width:26px;height:26px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;transition:transform .26s var(--ease),border-color .22s var(--ease),background .22s var(--ease);}
.faq-item.open .faq-icon{transform:rotate(135deg);border-color:var(--brand);background:var(--brand);color:var(--surface);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-a p{padding:0 4px 24px;font-size:15px;line-height:1.8;color:var(--text-muted);max-width:760px;}
/* ===== 表单 ===== */
.form-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start;}
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px;box-shadow:var(--sh-1);}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;}
.field input,.field select,.field textarea{width:100%;height:46px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface);padding:0 14px;font-size:15px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);}
.field textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 3px rgba(11,79,69,.12);}
.field .err{display:none;font-size:13px;color:var(--danger);margin-top:6px;}
.field.invalid input,.field.invalid textarea,.field.invalid select{border-color:var(--danger);}
.field.invalid .err{display:block;}
.check{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-muted);margin:4px 0 20px;}
.check input{width:18px;height:18px;height:18px;margin-top:3px;flex:none;accent-color:var(--brand);}
.check a{color:var(--brand);text-decoration:underline;}
.shake{animation:shake .3s var(--ease);}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
.privacy-note{margin-top:16px;font-size:13px;color:var(--text-muted);line-height:1.7;}
.privacy-note a{color:var(--brand);text-decoration:underline;}
.form-points{display:flex;flex-direction:column;gap:18px;margin-top:24px;}
.form-point{display:flex;gap:14px;align-items:flex-start;}
.form-point i{flex:none;width:34px;height:34px;border-radius:10px;background:rgba(201,242,77,.36);display:grid;place-items:center;color:var(--brand-deep);font-family:var(--font-latin);font-weight:800;font-size:14px;}
.form-point h4{font-size:16px;font-weight:600;}
.form-point p{font-size:14px;color:var(--text-muted);}
/* ===== 悬浮触发 + 弹层 ===== */
.fab{position:fixed;right:24px;bottom:28px;z-index:70;height:50px;padding:0 22px;border-radius:var(--r-pill);background:var(--brand);color:var(--text-invert);border:0;display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;cursor:pointer;box-shadow:var(--sh-2);transition:all .22s var(--ease);}
.fab:hover{background:var(--brand-deep);transform:translateY(-2px);}
.modal-mask{position:fixed;inset:0;z-index:90;background:rgba(10,25,22,.5);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;padding:24px;}
.modal-mask.open{display:flex;}
.modal{width:520px;max-width:92vw;background:var(--surface);border-radius:var(--r-lg);padding:30px;box-shadow:var(--sh-3);position:relative;max-height:88vh;overflow-y:auto;}
.modal h3{font-size:21px;font-weight:800;}
.modal > p{font-size:14px;color:var(--text-muted);margin:8px 0 22px;}
.modal-close{position:absolute;right:16px;top:16px;width:34px;height:34px;border:1px solid var(--line);border-radius:10px;background:var(--surface);display:grid;place-items:center;cursor:pointer;transition:all .2s var(--ease);}
.modal-close:hover{border-color:var(--brand);color:var(--brand);}
/* ===== CTA 条 ===== */
.cta-bar{background:var(--brand);color:var(--text-invert);border-radius:var(--r-lg);padding:44px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-bar h2{font-size:30px;font-weight:800;letter-spacing:-.01em;}
.cta-bar p{margin-top:10px;font-size:15px;color:rgba(243,246,244,.78);max-width:560px;}
.cta-bar .btn--accent{height:50px;padding:0 28px;}
/* ===== 页脚 ===== */
.site-footer{background:var(--ink-bg);color:var(--text-invert);padding-top:72px;margin-top:8px;}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:48px;}
.foot-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;margin-bottom:16px;}
.foot-brand .logo-mark{background:var(--accent);color:var(--ink-bg);}
.foot-about{font-size:14px;color:rgba(243,246,244,.66);line-height:1.8;max-width:320px;}
.foot-col h4{font-size:15px;font-weight:600;margin-bottom:18px;}
.foot-col a,.foot-col p{display:block;font-size:14px;color:rgba(243,246,244,.68);margin-bottom:10px;transition:color .2s var(--ease);}
.foot-col a:hover{color:var(--accent);}
.foot-bottom{border-top:1px solid rgba(243,246,244,.14);padding:22px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:13px;color:rgba(243,246,244,.55);}
.foot-bottom a{color:rgba(243,246,244,.7);}
.foot-bottom a:hover{color:var(--accent);}
.to-top{height:38px;padding:0 16px;border-radius:var(--r-pill);border:1px solid rgba(243,246,244,.24);background:transparent;color:var(--text-invert);cursor:pointer;font-size:13px;transition:all .2s var(--ease);}
.to-top:hover{border-color:var(--accent);color:var(--accent);}
/* ===== 进场动效 ===== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}
/* ===== 响应式 ===== */
@media (max-width:1199px){
  .hero h1{font-size:48px;}
  .hero-grid{gap:40px;}
  .search{width:210px;}
}
@media (max-width:1023px){
  .section{padding:76px 0;}
  .nav-links{display:none;}
  .search{display:none;}
  .burger{display:flex;}
  .nav-cta{display:none;}
  .hero{padding:64px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero h1{font-size:42px;}
  .float-card{left:16px;bottom:-18px;}
  .plan-grid{grid-template-columns:1fr;}
  .plan-card--main{grid-row:auto;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(2){border-right:0;}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid rgba(243,246,244,.16);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .form-wrap{grid-template-columns:1fr;gap:32px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px;}
  .sec-title{font-size:26px;}
  .hero h1{font-size:34px;}
  .hero-sub{font-size:16px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .ask-item{grid-template-columns:44px 1fr;gap:14px;padding:20px 8px 20px 0;}
  .ask-num{font-size:17px;padding-left:12px;}
  .ask-body h3{font-size:17px;}
  .ask-arrow{display:none;}
  .stats{grid-template-columns:1fr;}
  .stat{border-right:0;border-bottom:1px solid rgba(243,246,244,.16);}
  .stat:last-child{border-bottom:0;}
  .stat-num{font-size:44px;}
  .news-grid{grid-template-columns:1fr;}
  .cta-bar{padding:28px;flex-direction:column;align-items:flex-start;}
  .cta-bar h2{font-size:24px;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .modal{padding:24px;}
  .fab{right:16px;bottom:18px;height:46px;font-size:14px;padding:0 18px;}
}
@media (max-width:479px){
  .hero h1{font-size:30px;}
  .sec-title{font-size:23px;}
  .form-card{padding:22px;}
}

/* roulang page: article */
:root{
  --brand:#0B4F45;--brand-deep:#073A33;--ink-bg:#0A2622;--accent:#C9F24D;
  --bg:#F7F6F2;--surface:#FFFFFF;--surface-2:#EFEDE7;--line:#E2DFD6;
  --text:#12181A;--text-muted:#5C6663;--text-invert:#F3F6F4;
  --danger:#C0442B;--success:#1F7A5A;
  --r-sm:8px;--r-md:12px;--r-lg:20px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(16,24,26,.06);
  --sh-2:0 8px 24px -12px rgba(16,24,26,.18);
  --sh-3:0 24px 60px -24px rgba(7,58,51,.35);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-latin:"Inter","Space Grotesk",system-ui,sans-serif;
  --container:1200px;
  --ease:cubic-bezier(.2,.8,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-cn);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:800;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid rgba(11,79,69,.42);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* progress */
.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:120;transition:width .12s linear}

/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(247,246,242,.88);backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid transparent;transition:border-color .25s var(--ease),background .25s var(--ease)}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(247,246,242,.95)}
.nav{display:flex;align-items:center;gap:24px;height:64px;transition:height .25s var(--ease)}
.site-header.is-scrolled .nav{height:56px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:28px;height:28px;border-radius:9px;background:var(--brand);color:var(--text-invert);display:flex;align-items:center;justify-content:center;font-family:var(--font-latin);font-weight:700;font-size:14px;letter-spacing:.02em}
.logo-text{font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1 1 auto;min-width:0}
.nav-links a{position:relative;padding:8px 12px;font-size:14px;color:var(--text-muted);white-space:nowrap;border-radius:var(--r-sm);transition:color .2s var(--ease),background .2s var(--ease)}
.nav-links a:hover{color:var(--text);background:var(--surface-2)}
.nav-links a.active{color:var(--text);font-weight:600}
.nav-links a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;background:var(--brand);border-radius:2px}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto;margin-left:auto}
.search{display:flex;align-items:center;gap:8px;width:256px;height:38px;padding:0 10px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);color:var(--text-muted);transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.search:focus-within{border-color:var(--brand);box-shadow:var(--sh-1)}
.search input{flex:1 1 auto;min-width:0;border:0;background:transparent;outline:none;font-size:14px}
.search input::placeholder{color:#9aa3a0}
.kbd{font-family:var(--font-latin);font-size:12px;line-height:1;padding:3px 6px;border:1px solid var(--line);border-radius:5px;background:var(--surface-2);color:var(--text-muted)}
.burger{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease)}
.btn--primary{background:var(--brand);color:var(--text-invert);box-shadow:var(--sh-1)}
.btn--primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:none;box-shadow:var(--sh-1)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--brand);background:var(--surface-2)}
.btn--sm{height:38px;padding:0 16px;font-size:14px}
.btn--block{width:100%}
.nav-cta{height:38px;padding:0 16px;font-size:14px}

/* drawer */
.drawer{position:fixed;inset:64px 0 0;background:var(--bg);z-index:95;transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .24s var(--ease),transform .24s var(--ease);overflow-y:auto}
.drawer.open{opacity:1;transform:none;pointer-events:auto}
.drawer-inner{padding:24px;display:flex;flex-direction:column;gap:24px}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{font-size:20px;font-weight:600;padding:14px 0;border-bottom:1px solid var(--line)}

/* breadcrumb */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-muted);margin-bottom:22px}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#c3c8c4}
.breadcrumb .current{color:var(--text-muted);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* article hero */
.article-hero{position:relative;padding:56px 0 48px;border-bottom:1px solid var(--line);background:
  linear-gradient(180deg,rgba(255,255,255,.9),rgba(247,246,242,.96)),
  repeating-linear-gradient(0deg,rgba(11,79,69,.05) 0 1px,transparent 1px 32px),
  repeating-linear-gradient(90deg,rgba(11,79,69,.05) 0 1px,transparent 1px 32px);
  background-size:auto,auto,auto}
.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);background:rgba(11,79,69,.08);color:var(--brand);font-size:12px;font-weight:600;letter-spacing:.06em;margin-bottom:18px}
.article-hero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.14;letter-spacing:-.02em;max-width:22ch}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:24px;font-size:14px;color:var(--text-muted)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.article-meta .tag{font-family:var(--font-latin);color:var(--brand);font-weight:600}

/* layout */
.article-section{padding:64px 0 80px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:56px;align-items:start}
.article-main{max-width:760px;width:100%}
@media (min-width:1200px){.article-main{max-width:none}}

/* article body */
.article-body{font-size:17px;line-height:1.9;color:#1b2224}
.article-body>*+*{margin-top:20px}
.article-body p{margin:0 0 20px}
.article-body h2{font-size:24px;line-height:1.35;font-weight:700;margin:44px 0 16px;padding-left:14px;position:relative}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;width:3px;height:.9em;border-radius:2px;background:var(--brand)}
.article-body h3{font-size:19px;font-weight:600;margin:30px 0 12px}
.article-body h4{font-size:17px;font-weight:600;margin:24px 0 10px}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 20px}
.article-body li{margin:9px 0}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{margin:24px 0;padding:16px 20px;border-left:3px solid var(--brand);background:var(--surface);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--text-muted)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-md);margin:26px auto;border:1px solid var(--line)}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13px;color:var(--text-muted);text-align:center;margin-top:10px}
.article-body a{color:var(--brand);font-weight:600;border-bottom:1px solid rgba(11,79,69,.28)}
.article-body a:hover{border-bottom-color:var(--brand)}
.article-body strong{font-weight:600}
.article-body code{padding:2px 6px;border-radius:5px;background:var(--surface-2);font-family:var(--font-latin);font-size:.92em}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;background:var(--surface)}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--surface-2);font-weight:600}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

/* empty */
.empty-state{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:48px 32px;text-align:center;box-shadow:var(--sh-1)}
.empty-state svg{margin:0 auto 18px;color:var(--brand)}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--text-muted);font-size:15px;margin-bottom:22px}

/* side */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:20px;box-shadow:var(--sh-1)}
.side-title{font-size:13px;letter-spacing:.08em;color:var(--text-muted);font-weight:600;margin-bottom:12px}
.side-nav{display:flex;flex-direction:column;gap:2px}
.side-nav a{font-size:14px;padding:9px 10px;border-radius:var(--r-sm);color:var(--text-muted);transition:background .2s var(--ease),color .2s var(--ease)}
.side-nav a:hover{background:var(--surface-2);color:var(--text)}
.side-cta{background:var(--ink-bg);border-color:var(--ink-bg);color:var(--text-invert)}
.side-cta .side-title{color:rgba(243,246,244,.6)}
.side-cta p{font-size:14px;color:rgba(243,246,244,.78);margin-bottom:16px;line-height:1.7}

/* related */
.related{padding:8px 0 96px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.sec-head h2{font-size:30px;letter-spacing:-.02em}
.sec-head .sub{font-size:14px;color:var(--text-muted);margin-top:8px}
.link-arrow{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:600;font-size:15px}
.link-arrow svg{transition:transform .2s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);transition:border-color .25s var(--ease),box-shadow .25s var(--ease),transform .25s var(--ease)}
.card:hover{border-color:var(--brand);box-shadow:var(--sh-2);transform:translateY(-4px)}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.card:hover .card-media img{transform:scale(1.02)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto}
.card h3{font-size:18px;line-height:1.4;transition:color .2s var(--ease)}
.card:hover h3{color:var(--brand)}
.card p{font-size:14px;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{margin-top:auto;font-size:13px;color:var(--text-muted);display:flex;align-items:center;gap:8px}

/* footer */
.site-footer{background:var(--ink-bg);color:var(--text-invert);padding:64px 0 28px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(243,246,244,.12)}
.foot-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;margin-bottom:16px}
.foot-brand .logo-mark{background:var(--accent);color:var(--brand-deep)}
.foot-about{font-size:14px;line-height:1.8;color:rgba(243,246,244,.7);max-width:34ch}
.foot-col h4{font-size:14px;letter-spacing:.06em;margin-bottom:16px;color:var(--text-invert)}
.foot-col a,.foot-col p{display:block;font-size:14px;color:rgba(243,246,244,.7);margin-bottom:10px;line-height:1.7}
.foot-col a:hover{color:var(--accent)}
.foot-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:13px;color:rgba(243,246,244,.6)}
.foot-bottom a{color:rgba(243,246,244,.6)}
.foot-bottom a:hover{color:var(--accent)}
.to-top{border:1px solid rgba(243,246,244,.24);border-radius:var(--r-pill);padding:7px 16px;font-size:13px;color:var(--text-invert);transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease)}
.to-top:hover{background:var(--accent);border-color:var(--accent);color:var(--brand-deep)}

/* responsive */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:40px}
  .article-main{max-width:760px;margin:0 auto}
  .article-side{position:static;flex-direction:row;flex-wrap:wrap}
  .article-side .side-card{flex:1 1 280px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .search{width:200px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .nav{gap:12px}
  .search{display:none}
  .burger{display:inline-flex}
  .nav-cta{display:none}
  .article-hero{padding:36px 0 32px}
  .article-hero h1{font-size:clamp(26px,7vw,34px)}
  .article-section{padding:40px 0 56px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:21px;margin:34px 0 14px}
  .article-body h3{font-size:18px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .related{padding-bottom:64px}
  .sec-head h2{font-size:24px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:479px){
  .article-meta{font-size:13px;gap:8px 12px}
  .btn{width:100%}
  .btn.btn--sm{width:auto}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --brand:#0B4F45;
  --brand-deep:#073A33;
  --ink-bg:#0A2622;
  --accent:#C9F24D;
  --bg:#F7F6F2;
  --surface:#FFFFFF;
  --surface-2:#EFEDE7;
  --line:#E2DFD6;
  --text:#12181A;
  --text-muted:#5C6663;
  --text-invert:#F3F6F4;
  --danger:#C0442B;
  --success:#1F7A5A;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,24,26,.06);
  --sh-2:0 8px 24px -12px rgba(16,24,26,.18);
  --sh-3:0 24px 60px -24px rgba(10,38,34,.35);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-latin:"Inter","Space Grotesk",system-ui,sans-serif;
  --ease:cubic-bezier(.2,.8,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid rgba(11,79,69,.42);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),background .24s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(247,246,242,.96)}
.nav{display:flex;align-items:center;gap:24px;height:64px;transition:height .24s var(--ease)}
.site-header.is-scrolled .nav{height:56px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:-.01em;flex:0 0 auto}
.logo-mark{
  width:28px;height:28px;border-radius:8px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-family:var(--font-latin);font-size:14px;font-weight:700;
}
.logo-text{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:2px;flex:1;justify-content:center}
.nav-links a{
  position:relative;padding:8px 12px;border-radius:8px;font-size:14.5px;color:var(--text-muted);
  transition:color .18s var(--ease),background .18s var(--ease);white-space:nowrap;
}
.nav-links a:hover{color:var(--text);background:var(--surface-2)}
.nav-links a.active{color:var(--text);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.search{
  display:flex;align-items:center;gap:8px;width:264px;height:38px;padding:0 10px 0 12px;
  border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface);
  color:var(--text-muted);transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.search input{border:0;background:transparent;outline:none;flex:1;min-width:0;font-size:14px;color:var(--text)}
.search input::placeholder{color:var(--text-muted)}
.search:focus-within{border-color:var(--brand);box-shadow:var(--sh-1)}
.kbd{
  font-family:var(--font-latin);font-size:11px;line-height:1;padding:3px 6px;border:1px solid var(--line);
  border-radius:6px;background:var(--surface-2);color:var(--text-muted);flex:0 0 auto;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0);box-shadow:none}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--brand);background:var(--surface-2)}
.btn--ghost:active{transform:translateY(1px)}
.btn--invert{background:#fff;color:var(--brand)}
.btn--invert:hover{background:var(--accent);color:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-3)}
.nav-cta{height:40px;padding:0 18px;font-size:14.5px}
.burger{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  align-items:center;justify-content:center;color:var(--text);background:var(--surface);
}
.burger:hover{border-color:var(--brand)}
.mobile-panel{
  position:fixed;left:0;right:0;top:64px;bottom:0;z-index:55;
  background:var(--bg);padding:20px 24px 40px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
}
.mobile-panel.open{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-panel .m-search{
  display:flex;align-items:center;gap:10px;height:46px;padding:0 14px;margin-bottom:20px;
  border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);color:var(--text-muted);
}
.mobile-panel .m-search input{border:0;background:transparent;outline:none;flex:1;font-size:15px;color:var(--text);min-width:0}
.mobile-panel nav{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.mobile-panel nav a{
  padding:18px 4px;font-size:19px;font-weight:600;border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
}
.mobile-panel nav a span{font-family:var(--font-latin);font-size:13px;color:var(--text-muted)}
.mobile-panel nav a.active{color:var(--brand)}
.mobile-panel .btn{width:100%;margin-top:24px}

/* ---------- breadcrumb & hero ---------- */
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-muted);padding-top:28px;flex-wrap:wrap}
.crumb a{color:var(--text-muted);transition:color .18s var(--ease)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--line)}
.crumb .current{color:var(--text)}
.page-hero{padding:28px 0 8px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.1em;
  color:var(--brand);background:rgba(11,79,69,.07);border-radius:var(--r-pill);
  padding:6px 14px;margin-bottom:20px;font-weight:600;
}
h1{font-size:clamp(30px,3.6vw,50px);line-height:1.12;font-weight:800;letter-spacing:-.02em}
.lede{margin-top:20px;font-size:17px;line-height:1.85;color:var(--text-muted);max-width:54ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-note{margin-top:22px;font-size:14px;color:var(--text-muted);display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.hero-note .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 auto}
.hero-figure{position:relative}
.hero-figure img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);
  border:1px solid var(--line);background:var(--surface-2);box-shadow:var(--sh-2);
}
.hero-badge{
  position:absolute;left:20px;bottom:-22px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:14px 18px;box-shadow:var(--sh-2);min-width:172px;
}
.hero-badge strong{display:block;font-family:var(--font-latin);font-size:24px;line-height:1.2;color:var(--brand)}
.hero-badge span{font-size:13px;color:var(--text-muted)}

/* ---------- doc layout ---------- */
.doc-wrap{padding:88px 0 8px}
.doc-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:56px;align-items:start}
.toc{position:sticky;top:96px}
.toc-title{
  font-size:12px;letter-spacing:.12em;color:var(--text-muted);font-weight:600;
  padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:8px;
}
.toc a{
  display:block;padding:9px 0 9px 14px;font-size:14.5px;color:var(--text-muted);
  border-left:2px solid var(--line);transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.toc a:hover{color:var(--text);background:var(--surface-2)}
.toc a.active{color:var(--brand);font-weight:600;border-left-color:var(--brand);background:rgba(11,79,69,.05)}
.toc-cta{margin-top:24px;padding:20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md)}
.toc-cta p{font-size:14px;color:var(--text-muted);line-height:1.7}
.toc-cta .btn{width:100%;height:40px;margin-top:14px;font-size:14px}

.doc-body{max-width:760px}
.doc-section{margin-bottom:72px;scroll-margin-top:96px}
.doc-section h2{
  position:relative;padding-left:16px;font-size:clamp(22px,2.2vw,28px);line-height:1.3;font-weight:700;
  letter-spacing:-.01em;
}
.doc-section h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:2px;background:var(--brand);
}
.doc-section h3{margin-top:30px;font-size:19px;line-height:1.4;font-weight:600}
.doc-section p{margin-top:18px;font-size:17px;line-height:1.9;color:var(--text)}
.doc-section p.muted{color:var(--text-muted)}
.doc-section .lead-block{margin-top:20px}
.doc-figure{margin-top:30px;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--surface)}
.doc-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.doc-figure figcaption{font-size:13px;color:var(--text-muted);padding:12px 18px;border-top:1px solid var(--line)}

.step-list{margin-top:26px;border-top:1px solid var(--line)}
.step-list li{
  position:relative;display:grid;grid-template-columns:60px minmax(0,1fr);gap:18px;
  padding:22px 12px;border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.step-list li::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:2px;
  background:var(--brand);transform:scaleY(0);transform-origin:center;
  transition:transform .24s var(--ease);
}
.step-list li:hover{background:var(--surface-2)}
.step-list li:hover::before{transform:scaleY(1)}
.step-list .num{font-family:var(--font-latin);font-size:20px;font-weight:700;color:var(--brand);line-height:1.5}
.step-list strong{display:block;font-size:17px;font-weight:600;margin-bottom:6px}
.step-list span{font-size:15.5px;line-height:1.8;color:var(--text-muted)}

.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:28px}
.check-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 24px;transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.check-card:hover{border-color:var(--brand);transform:translateY(-3px);box-shadow:var(--sh-2)}
.check-card .tag{
  display:inline-block;font-family:var(--font-latin);font-size:12px;letter-spacing:.08em;
  color:var(--brand);background:rgba(11,79,69,.08);border-radius:var(--r-pill);padding:3px 10px;margin-bottom:12px;
}
.check-card h3{margin:0;font-size:17px}
.check-card p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--text-muted)}

.callout{
  margin-top:28px;padding:22px 24px;border-left:3px solid var(--brand);
  background:var(--surface);border-radius:0 var(--r-md) var(--r-md) 0;border-top:1px solid var(--line);
  border-right:1px solid var(--line);border-bottom:1px solid var(--line);
}
.callout strong{display:block;font-size:16px;font-weight:600;margin-bottom:8px}
.callout p{margin-top:0;font-size:15px;line-height:1.85;color:var(--text-muted)}
.callout--warn{border-left-color:var(--danger)}
.callout--warn strong{color:var(--danger)}

.inline-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;
  font-size:15px;transition:gap .2s var(--ease),color .2s var(--ease);
}
.inline-link:hover{gap:12px;color:var(--brand-deep)}

/* ---------- faq ---------- */
.faq{margin-top:28px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;text-align:left;font-size:18px;font-weight:600;line-height:1.5;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  position:relative;width:18px;height:18px;flex:0 0 auto;
  transition:transform .28s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq-icon::before{left:0;right:0;top:8px;height:2px}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px;transition:opacity .28s var(--ease)}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s var(--ease)}
.faq-a > div{overflow:hidden}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a p{padding:0 40px 24px 4px;font-size:15.5px;line-height:1.85;color:var(--text-muted);margin:0}

/* ---------- cta band ---------- */
.cta-band{margin:0 0 96px}
.cta-inner{
  background:var(--ink-bg);border-radius:var(--r-lg);padding:52px 56px;
  display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-inner::after{
  content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,242,77,.16),transparent 68%);
}
.cta-inner h2{color:var(--text-invert);font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3;letter-spacing:-.01em}
.cta-inner p{color:rgba(243,246,244,.72);font-size:15.5px;line-height:1.8;margin-top:12px;max-width:56ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}

/* ---------- related ---------- */
.related{margin-bottom:96px}
.related h2{font-size:20px;font-weight:600;margin-bottom:18px}
.related-links{display:flex;flex-wrap:wrap;gap:16px 40px}
.related-links a{font-size:15.5px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-bg);color:rgba(243,246,244,.78);padding:72px 0 28px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:16px}
.foot-brand .logo-mark{background:#fff;color:var(--ink-bg)}
.foot-about{font-size:14.5px;line-height:1.85;color:rgba(243,246,244,.66);max-width:34ch}
.foot-col h4{font-size:12.5px;letter-spacing:.1em;color:rgba(243,246,244,.5);font-weight:600;margin-bottom:16px}
.foot-col a,.foot-col p{display:block;font-size:14.5px;line-height:1.9;color:rgba(243,246,244,.78);margin-bottom:6px;transition:color .18s var(--ease)}
.foot-col a:hover{color:var(--accent)}
.foot-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(243,246,244,.14);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(243,246,244,.55);
}
.foot-bottom a{color:rgba(243,246,244,.7)}
.foot-bottom a:hover{color:var(--accent)}
.to-top{
  padding:8px 16px;border:1px solid rgba(243,246,244,.24);border-radius:var(--r-pill);
  color:rgba(243,246,244,.85);font-size:13.5px;transition:all .2s var(--ease);
}
.to-top:hover{border-color:var(--accent);color:var(--accent)}
.to-top.inline{display:none}

/* ---------- float to top ---------- */
.float-top{
  position:fixed;right:24px;bottom:24px;z-index:50;
  width:44px;height:44px;border-radius:50%;background:var(--brand);color:#fff;
  display:grid;place-items:center;box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .24s var(--ease);
}
.float-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.float-top:hover{background:var(--brand-deep);transform:translateY(-2px)}

/* ---------- animations ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .search{width:220px}
  .nav-links a{padding:8px 9px;font-size:14px}
  .hero-grid{gap:40px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .search{display:none}
  .burger{display:flex}
  .nav{justify-content:space-between}
  .nav-right{margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-badge{position:static;margin-top:16px;display:inline-block}
  .doc-layout{grid-template-columns:1fr;gap:36px}
  .toc{position:static;border:1px solid var(--line);background:var(--surface);border-radius:var(--r-md);padding:18px 20px}
  .toc-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
  .toc a{border-left:0;border:1px solid var(--line);border-radius:var(--r-pill);padding:6px 14px;font-size:13.5px}
  .toc a.active{background:rgba(11,79,69,.08)}
  .toc-cta{margin-top:18px;border:0;padding:0;background:transparent}
  .toc-cta .btn{width:auto;padding:0 18px}
  .check-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .page-hero{padding:20px 0 0}
  .doc-wrap{padding:56px 0 0}
  .doc-section{margin-bottom:56px}
  .doc-section p{font-size:16px}
  .step-list li{grid-template-columns:44px minmax(0,1fr);gap:12px;padding:18px 8px}
  .cta-inner{padding:34px 26px;gap:24px}
  .cta-band,.related{margin-bottom:64px}
  .faq-q{font-size:16.5px;padding:18px 2px}
  .faq-a p{padding-right:12px;font-size:15px}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .float-top{right:16px;bottom:16px}
}
@media (max-width:480px){
  h1{font-size:30px}
  .hero-actions .btn{width:100%}
  .logo-text{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --brand:#0B4F45;
  --brand-deep:#073A33;
  --ink-bg:#0A2622;
  --accent:#C9F24D;
  --accent-soft:rgba(201,242,77,.16);
  --bg:#F7F6F2;
  --surface:#FFFFFF;
  --surface-2:#EFEDE7;
  --line:#E2DFD6;
  --text:#12181A;
  --text-muted:#5C6663;
  --text-invert:#F3F6F4;
  --danger:#C0442B;
  --success:#1F7A5A;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,24,26,.06);
  --sh-2:0 8px 24px -12px rgba(16,24,26,.18);
  --sh-3:0 24px 60px -24px rgba(16,24,26,.32);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-latin:"Inter","Space Grotesk",system-ui,sans-serif;
  --ease:cubic-bezier(.2,.8,.2,1);
  --header-h:64px;
  --gap-section:110px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid rgba(11,79,69,.45);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,246,242,.88);
  backdrop-filter:saturate(1.2) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),background .24s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(247,246,242,.95)}
.nav{display:flex;align-items:center;gap:28px;height:var(--header-h);transition:height .24s var(--ease)}
.site-header.is-scrolled .nav{height:56px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:-.01em;flex:0 0 auto}
.logo-mark{
  width:28px;height:28px;border-radius:8px;background:var(--brand);color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-latin);font-weight:800;font-size:15px;line-height:1;
}
.logo-text{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:22px;margin-right:auto}
.nav-links a{
  position:relative;font-size:15px;color:var(--text-muted);padding:6px 0;
  transition:color .2s var(--ease);white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--text);font-weight:600}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.search{
  display:flex;align-items:center;gap:8px;width:262px;height:40px;padding:0 10px 0 12px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-pill);
  color:var(--text-muted);transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search:focus-within{border-color:var(--brand);box-shadow:var(--sh-1)}
.search input{border:0;outline:none;background:transparent;flex:1;font-size:14px;min-width:0}
.kbd{
  font-family:var(--font-latin);font-size:12px;line-height:1;padding:4px 6px;border:1px solid var(--line);
  border-radius:6px;color:var(--text-muted);background:var(--surface-2);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:10px;font-size:15px;font-weight:600;
  border:1px solid transparent;transition:all .22s var(--ease);white-space:nowrap;
}
.btn--primary{background:var(--brand);color:var(--text-invert)}
.btn--primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--brand);background:var(--surface-2)}
.btn--accent{background:var(--accent);color:#13311F}
.btn--accent:hover{background:#d8ff62;transform:translateY(-1px)}
.btn--sm{height:40px;padding:0 16px;font-size:14px}
.nav-cta{height:40px;padding:0 18px;font-size:14px}
.burger{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:10px;background:var(--surface)}

/* ---------- hero ---------- */
.page-hero{position:relative;padding:56px 0 88px;overflow:hidden;background:var(--bg)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(11,79,69,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(11,79,69,.05) 1px,transparent 1px);
  background-size:64px 64px;mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 78%);pointer-events:none;
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-muted);margin-bottom:26px;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span.sep{opacity:.6}
.breadcrumb .current{color:var(--text-muted)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.06em;
  color:var(--brand);background:var(--accent-soft);border:1px solid rgba(11,79,69,.14);
  border-radius:var(--r-pill);padding:5px 12px;margin-bottom:20px;font-weight:600;
}
.page-hero h1{
  font-size:54px;line-height:1.06;font-weight:800;letter-spacing:-.02em;margin-bottom:22px;
}
.page-hero h1 em{font-style:normal;box-shadow:inset 0 -12px 0 var(--accent)}
.lead{font-size:17px;line-height:1.85;color:var(--text-muted);max-width:56ch;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.trust-row{display:flex;gap:20px;flex-wrap:wrap;font-size:14px;color:var(--text-muted)}
.trust-row b{font-family:var(--font-latin);font-weight:800;color:var(--brand);margin-right:6px}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-lg);
  border:1px solid var(--line);box-shadow:var(--sh-2);background:var(--surface-2);
}
.float-card{
  position:absolute;left:-18px;bottom:22px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-2);padding:14px 18px;display:flex;gap:14px;align-items:center;
}
.float-card .num{font-family:var(--font-latin);font-size:30px;font-weight:800;color:var(--brand);line-height:1}
.float-card .cap{font-size:13px;color:var(--text-muted);line-height:1.5}

/* ---------- sections ---------- */
.section{padding:var(--gap-section) 0}
.section--surface{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:52px}
.kicker{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--brand);margin-bottom:16px;
}
.kicker::before{content:"";width:12px;height:2px;background:var(--brand);display:inline-block}
.section-head h2{font-size:38px;line-height:1.16;font-weight:700;letter-spacing:-.015em;margin-bottom:18px}
.section-head p{color:var(--text-muted);font-size:16px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.step{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:24px 20px;
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.step:hover{border-color:var(--brand);transform:translateY(-4px);box-shadow:var(--sh-2)}
.step .no{font-family:var(--font-latin);font-size:13px;font-weight:800;color:var(--brand);letter-spacing:.04em}
.step h3{font-size:17px;font-weight:600;margin:12px 0 8px}
.step p{font-size:14px;color:var(--text-muted);line-height:1.7}

/* zigzag */
.zig-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.zig-row + .zig-row{margin-top:96px}
.zig-row--reverse .zig-media{order:2}
.zig-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);
  border:1px solid var(--line);background:var(--surface-2);box-shadow:var(--sh-1);
}
.zig-index{
  font-family:var(--font-latin);font-size:14px;font-weight:800;color:var(--brand);
  letter-spacing:.08em;margin-bottom:14px;display:block;
}
.zig-body h2{font-size:32px;line-height:1.2;font-weight:700;letter-spacing:-.015em;margin-bottom:18px}
.zig-body p{color:var(--text-muted);margin-bottom:16px}
.zig-body p:last-of-type{margin-bottom:0}
.check-list{margin-top:22px;display:grid;gap:12px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;line-height:1.7}
.check-list li::before{
  content:"";flex:0 0 auto;width:18px;height:18px;margin-top:5px;border-radius:6px;
  background:var(--accent-soft);border:1px solid rgba(11,79,69,.16);
  background-image:linear-gradient(var(--brand),var(--brand)),linear-gradient(var(--brand),var(--brand));
  background-size:8px 2px,2px 8px;background-position:center;background-repeat:no-repeat;
}

/* pitfall list */
.pit-list{border-top:1px solid var(--line)}
.pit-item{
  position:relative;display:grid;grid-template-columns:74px 1fr auto;gap:24px;align-items:start;
  padding:26px 20px 26px 18px;border-bottom:1px solid var(--line);transition:background .22s var(--ease);
}
.pit-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand);
  transform:scaleY(0);transform-origin:top;transition:transform .24s var(--ease);
}
.pit-item:hover{background:var(--surface-2)}
.pit-item:hover::before{transform:scaleY(1)}
.pit-no{font-family:var(--font-latin);font-size:20px;font-weight:800;color:var(--brand)}
.pit-item h3{font-size:19px;font-weight:600;margin-bottom:8px}
.pit-item p{font-size:14.5px;color:var(--text-muted)}
.pit-arrow{color:var(--brand);transition:transform .22s var(--ease);align-self:center}
.pit-item:hover .pit-arrow{transform:translateX(5px)}

/* faq */
.faq{max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 4px;text-align:left;font-size:18px;font-weight:600;transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-ico{
  flex:0 0 auto;width:26px;height:26px;border:1px solid var(--line);border-radius:50%;
  position:relative;transition:transform .28s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);transform:translate(-50%,-50%);
}
.faq-ico::before{width:11px;height:1.5px}
.faq-ico::after{width:1.5px;height:11px}
.faq-item.open .faq-ico{transform:rotate(45deg);background:var(--accent-soft);border-color:rgba(11,79,69,.2)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a p{padding:0 60px 26px 4px;font-size:15px;line-height:1.85;color:var(--text-muted)}

/* cta band */
.cta-band{background:var(--ink-bg);color:var(--text-invert);border-radius:var(--r-lg);padding:56px;display:grid;grid-template-columns:1.4fr auto;gap:40px;align-items:center}
.cta-band h2{font-size:32px;line-height:1.2;font-weight:700;letter-spacing:-.015em;margin-bottom:14px}
.cta-band p{color:rgba(243,246,244,.72);font-size:15px;max-width:52ch}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.related{margin-top:44px;display:flex;align-items:center;gap:18px;flex-wrap:wrap;font-size:15px}
.related b{font-size:14px;color:var(--text-muted);font-weight:600}
.related a{color:var(--brand);font-weight:600;border-bottom:1px solid rgba(11,79,69,.25);padding-bottom:2px;transition:border-color .2s var(--ease)}
.related a:hover{border-color:var(--brand)}

/* footer */
.site-footer{background:var(--ink-bg);color:var(--text-invert);margin-top:0;padding:72px 0 0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:48px;padding-bottom:56px}
.foot-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;margin-bottom:18px}
.foot-brand .logo-mark{background:var(--accent);color:#0A2622}
.foot-about{font-size:14px;line-height:1.85;color:rgba(243,246,244,.68);max-width:34ch}
.foot-col h4{font-size:14px;font-weight:600;letter-spacing:.04em;margin-bottom:18px;color:var(--text-invert)}
.foot-col a,.foot-col p{display:block;font-size:14px;color:rgba(243,246,244,.68);margin-bottom:12px;line-height:1.7;transition:color .2s var(--ease)}
.foot-col a:hover{color:var(--accent)}
.foot-bottom{
  border-top:1px solid rgba(243,246,244,.14);padding:22px 0;display:flex;align-items:center;
  justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:rgba(243,246,244,.6);
}
.foot-bottom a:hover{color:var(--accent)}
.to-top{
  border:1px solid rgba(243,246,244,.24);border-radius:var(--r-pill);padding:8px 16px;
  font-size:13px;color:var(--text-invert);transition:all .22s var(--ease);
}
.to-top:hover{background:var(--accent);color:#0A2622;border-color:var(--accent)}

/* reveal */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.in{opacity:1;transform:none;transition:opacity .5s var(--ease),transform .5s var(--ease)}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .page-hero h1{font-size:46px}
  .search{width:210px}
  .nav-links{gap:16px}
}
@media (max-width:1023px){
  :root{--gap-section:80px}
  .nav-links{display:none}
  .burger{display:inline-flex}
  body.nav-open .nav-links{
    display:flex;flex-direction:column;align-items:flex-start;gap:6px;
    position:fixed;left:0;right:0;top:var(--header-h);bottom:0;background:var(--bg);
    padding:28px 24px 40px;z-index:70;overflow-y:auto;
  }
  body.nav-open .nav-links a{font-size:20px;font-weight:600;color:var(--text);padding:14px 0;width:100%;border-bottom:1px solid var(--line)}
  body.nav-open .nav-links a::after{display:none}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .float-card{left:16px}
  .section--surface .zig-row + .zig-row{margin-top:72px}
  .zig-row{grid-template-columns:1fr;gap:32px}
  .zig-row--reverse .zig-media{order:0}
  .steps{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-band{grid-template-columns:1fr;padding:40px}
}
@media (max-width:767px){
  :root{--gap-section:64px;--header-h:60px}
  .container{padding:0 20px}
  .search{display:none}
  .nav-cta{display:none}
  .page-hero{padding:32px 0 64px}
  .page-hero h1{font-size:32px;line-height:1.18}
  .lead{font-size:16px}
  .section-head h2{font-size:26px}
  .zig-body h2{font-size:24px}
  .steps{grid-template-columns:1fr}
  .pit-item{grid-template-columns:52px 1fr;gap:16px;padding:22px 12px}
  .pit-arrow{display:none}
  .faq-q{font-size:16.5px;padding:20px 0}
  .faq-a p{padding:0 0 22px}
  .cta-band{padding:32px 24px;border-radius:var(--r-md)}
  .cta-band h2{font-size:24px}
  .foot-grid{grid-template-columns:1fr;gap:32px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:519px){
  .logo-text{font-size:15px}
  .hero-actions .btn{width:100%}
  .trust-row{gap:12px}
}

/* roulang page: category2 */
:root{
  --brand:#0B4F45;
  --brand-deep:#073A33;
  --ink-bg:#0A2622;
  --accent:#C9F24D;
  --bg:#F7F6F2;
  --surface:#FFFFFF;
  --surface-2:#EFEDE7;
  --line:#E2DFD6;
  --text:#12181A;
  --text-muted:#5C6663;
  --text-invert:#F3F6F4;
  --danger:#C0442B;
  --success:#1F7A5A;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,24,26,.06);
  --sh-2:0 8px 24px -12px rgba(16,24,26,.18);
  --sh-3:0 24px 60px -24px rgba(10,38,34,.38);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-latin:"Inter","Space Grotesk",system-ui,-apple-system,sans-serif;
  --ease:cubic-bezier(.2,.8,.2,1);
  --head-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--text)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.2}
p{margin:0}
:focus-visible{outline:2px solid rgba(11,79,69,.45);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- header / nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:var(--head-h);
  background:rgba(247,246,242,.86);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid transparent;
  transition:height .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease);
}
.site-header.shrink{height:56px;border-bottom-color:var(--line);box-shadow:var(--sh-1);background:rgba(247,246,242,.95)}
.nav{display:flex;align-items:center;gap:24px;height:100%}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.logo-mark{
  width:28px;height:28px;border-radius:8px;display:grid;place-items:center;
  background:var(--brand);color:var(--text-invert);
  font-family:var(--font-latin);font-weight:800;font-size:15px;line-height:1;
}
.logo-text{color:var(--text)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-links a{
  position:relative;padding:10px 12px;font-size:15px;color:var(--text-muted);
  border-radius:var(--r-sm);transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-links a:hover{color:var(--text);background:var(--surface-2)}
.nav-links a.active{color:var(--text);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.search{position:relative;display:flex;align-items:center;gap:8px;width:270px;height:38px;padding:0 10px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-pill);color:var(--text-muted);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.search:focus-within{border-color:var(--brand);box-shadow:var(--sh-1);color:var(--brand)}
.search input{border:0;outline:0;background:transparent;width:100%;font-size:14px}
.search input::placeholder{color:#9AA3A0}
.search .kbd{
  font-family:var(--font-latin);font-size:11px;letter-spacing:.04em;color:var(--text-muted);
  border:1px solid var(--line);border-radius:6px;padding:2px 6px;background:var(--surface-2);white-space:nowrap;
}
.search-panel{
  position:absolute;top:calc(100% + 10px);left:0;width:330px;padding:16px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-3);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.search-panel.open{opacity:1;visibility:visible;transform:none}
.search-panel h4{font-size:13px;color:var(--text-muted);font-weight:600;letter-spacing:.04em;margin-bottom:10px}
.search-panel .hot{display:flex;flex-wrap:wrap;gap:8px}
.search-panel .hot a{padding:6px 12px;font-size:13px;background:var(--surface-2);border-radius:var(--r-pill);color:var(--text)}
.search-panel .hot a:hover{background:var(--brand);color:var(--text-invert)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn--primary{background:var(--brand);color:var(--text-invert);box-shadow:var(--sh-1)}
.btn--primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--brand);background:var(--surface-2)}
.btn--sm{height:38px;padding:0 16px;font-size:14px}
.nav-cta{height:38px;padding:0 18px;font-size:14px;border-radius:10px}
.burger{display:none;width:38px;height:38px;align-items:center;justify-content:center;background:transparent;border:1px solid var(--line);border-radius:10px;color:var(--text)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px}
.link-arrow svg{transition:transform .2s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- page shell ---------- */
main{padding-top:var(--head-h)}
section{scroll-margin-top:88px}
.sec{padding:104px 0}
.sec--tight{padding:76px 0}
.sec--dark{background:var(--ink-bg);color:var(--text-invert)}
.sec--surface{background:var(--surface)}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head .kicker{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;font-weight:600;
  letter-spacing:.08em;color:var(--brand);margin-bottom:14px;
}
.sec-head .kicker::before{content:"";width:16px;height:2px;background:var(--brand)}
.sec-head h2{font-size:38px}
.sec-head p{margin-top:14px;color:var(--text-muted);font-size:16px}
.sec--dark .sec-head h2{color:var(--text-invert)}
.sec--dark .sec-head p{color:rgba(243,246,244,.72)}
.sec--dark .sec-head .kicker{color:var(--accent)}
.sec--dark .sec-head .kicker::before{background:var(--accent)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--surface);border-bottom:1px solid var(--line)}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(11,79,69,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(11,79,69,.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 78%);
  pointer-events:none;
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;padding:56px 0 72px}
.crumb{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-muted);margin-bottom:22px}
.crumb a:hover{color:var(--brand)}
.crumb span{color:var(--text-muted)}
.crumb .now{color:var(--text-muted)}
.hero h1{font-size:60px;line-height:1.06;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--brand);box-shadow:inset 0 -12px 0 rgba(201,242,77,.65)}
.hero-lead{margin-top:22px;font-size:17px;color:var(--text-muted);max-width:56ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.tag{
  font-size:12px;letter-spacing:.06em;color:var(--brand);
  background:rgba(11,79,69,.07);border-radius:var(--r-pill);padding:6px 12px;
}
.tag--accent{background:rgba(201,242,77,.35);color:var(--brand-deep)}
.hero-figure{position:relative}
.hero-figure img{border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh-2);aspect-ratio:16/11;object-fit:cover;width:100%}
.hero-float{
  position:absolute;left:-18px;bottom:26px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-2);padding:14px 18px;min-width:180px;
}
.hero-float b{display:block;font-family:var(--font-latin);font-size:28px;line-height:1.1;color:var(--brand)}
.hero-float span{font-size:13px;color:var(--text-muted)}

/* ---------- timeline ---------- */
.tl{position:relative;margin-top:12px;padding-left:8px}
.tl::before{content:"";position:absolute;left:22px;top:14px;bottom:26px;width:1px;background:linear-gradient(180deg,var(--brand),rgba(11,79,69,.12))}
.tl-item{position:relative;padding:0 0 46px 68px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:15px;top:6px;width:15px;height:15px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 5px rgba(11,79,69,.10);
  transition:box-shadow .24s var(--ease),transform .24s var(--ease);
}
.tl-item:hover::before{box-shadow:0 0 0 8px rgba(11,79,69,.16);transform:scale(1.06)}
.tl-num{font-family:var(--font-latin);font-size:13px;letter-spacing:.1em;color:var(--brand);font-weight:600}
.tl-item h3{font-size:22px;margin-top:6px}
.tl-item p{margin-top:10px;color:var(--text-muted);max-width:74ch}
.tl-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{font-size:12px;letter-spacing:.04em;color:var(--text-muted);border:1px solid var(--line);border-radius:var(--r-pill);padding:5px 12px;background:var(--surface)}
.tl-note{margin-top:14px;padding:14px 16px;border-left:3px solid var(--accent);background:var(--surface-2);border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:14px;color:var(--text-muted)}

/* ---------- cards ---------- */
.cards{display:grid;gap:24px}
.cards--asym{grid-template-columns:1fr 1fr}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.card:hover{border-color:var(--brand);box-shadow:var(--sh-2);transform:translateY(-4px)}
.card h3{font-size:20px;margin-bottom:12px}
.card p{color:var(--text-muted);font-size:15px}
.card--wide{grid-column:1 / -1;display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center}
.card--wide img{border-radius:var(--r-md);border:1px solid var(--line);aspect-ratio:16/9;object-fit:cover;width:100%}
.card-badge{
  display:inline-block;font-size:12px;letter-spacing:.06em;color:var(--brand);
  background:rgba(11,79,69,.08);border-radius:var(--r-pill);padding:4px 10px;margin-bottom:14px;
}
.card-list{margin-top:16px;display:grid;gap:8px}
.card-list li{position:relative;padding-left:18px;font-size:14px;color:var(--text-muted)}
.card-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand)}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid rgba(243,246,244,.16)}
.stat{padding:32px 24px 8px;border-right:1px solid rgba(243,246,244,.16)}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:var(--font-latin);font-size:60px;line-height:1;font-weight:800;color:var(--text-invert)}
.stat b i{font-style:normal;color:var(--accent)}
.stat span{display:block;margin-top:12px;font-size:14px;color:rgba(243,246,244,.68)}
.stat-bar{height:3px;width:44px;background:var(--accent);margin-top:16px;border-radius:2px}

/* ---------- checklist ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.check{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:24px;
  display:flex;gap:16px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.check:hover{border-color:var(--brand);box-shadow:var(--sh-1)}
.check .idx{font-family:var(--font-latin);font-weight:800;font-size:14px;color:var(--brand);padding-top:4px}
.check h3{font-size:17px;margin-bottom:8px}
.check p{font-size:14px;color:var(--text-muted)}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;background:transparent;border:0;text-align:left;font-size:18px;font-weight:600;color:var(--text);
  transition:color .18s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-q .ico{
  flex:0 0 26px;width:26px;height:26px;border:1px solid var(--line);border-radius:50%;
  display:grid;place-items:center;color:var(--brand);transition:transform .28s var(--ease),border-color .18s var(--ease);
}
.faq-item.open .faq-q .ico{transform:rotate(45deg);border-color:var(--brand);background:rgba(11,79,69,.06)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a-inner{padding:0 4px 24px;max-width:80ch;font-size:15px;color:var(--text-muted);line-height:1.85}

/* ---------- cta / form ---------- */
.cta-band{position:relative;overflow:hidden;border-radius:var(--r-lg);background:var(--ink-bg);color:var(--text-invert)}
.cta-band::before{
  content:"";position:absolute;inset:0;background-image:url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;opacity:.22;
}
.cta-inner{position:relative;display:grid;grid-template-columns:.95fr 1.05fr;gap:44px;padding:52px}
.cta-copy h2{font-size:34px;color:var(--text-invert)}
.cta-copy p{margin-top:16px;color:rgba(243,246,244,.75)}
.cta-meta{margin-top:26px;display:grid;gap:10px;font-size:14px;color:rgba(243,246,244,.7)}
.cta-meta li{display:flex;gap:10px;align-items:flex-start}
.cta-meta svg{flex:0 0 16px;margin-top:5px;color:var(--accent)}
.form-card{background:var(--surface);border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh-3);color:var(--text)}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .hint{font-size:13px;color:var(--text-muted);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:8px;color:var(--text)}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 12px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--surface);transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{height:92px;padding:12px;resize:vertical;line-height:1.6}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 3px rgba(11,79,69,.12)}
.field.err input,.field.err select{border-color:var(--danger);animation:shake .3s var(--ease) 1}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
.err-msg{display:none;margin-top:6px;font-size:13px;color:var(--danger)}
.field.err .err-msg{display:block}
.agree{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--text-muted);margin:6px 0 18px}
.agree input{width:16px;height:16px;margin-top:4px;accent-color:var(--brand)}
.agree a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.notice{margin-bottom:18px;padding:12px 14px;border-radius:var(--r-sm);font-size:14px;border:1px solid transparent}
.notice--ok{background:rgba(31,122,90,.08);border-color:rgba(31,122,90,.28);color:var(--success)}
.notice--err{background:rgba(192,68,43,.07);border-color:rgba(192,68,43,.28);color:var(--danger)}
.form-tip{margin-top:14px;font-size:12px;color:var(--text-muted)}
.related{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.related a{
  display:inline-flex;align-items:center;gap:8px;padding:12px 18px;border:1px solid var(--line);
  border-radius:var(--r-pill);font-size:14px;background:var(--surface);
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.related a:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-bg);color:var(--text-invert);padding:72px 0 0;margin-top:96px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;border-bottom:1px solid rgba(243,246,244,.14)}
.foot-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;margin-bottom:16px}
.foot-about{font-size:14px;color:rgba(243,246,244,.66);max-width:34ch}
.foot-col h4{font-size:14px;font-weight:600;letter-spacing:.04em;margin-bottom:16px;color:var(--text-invert)}
.foot-col a,.foot-col p{display:block;font-size:14px;color:rgba(243,246,244,.66);margin-bottom:10px;line-height:1.7}
.foot-col a:hover{color:var(--accent)}
.foot-bottom{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;padding:22px 0 28px;font-size:13px;color:rgba(243,246,244,.6)}
.foot-bottom a{color:rgba(243,246,244,.72)}
.foot-bottom a:hover{color:var(--accent)}
.to-top{
  background:transparent;border:1px solid rgba(243,246,244,.28);color:var(--text-invert);
  border-radius:var(--r-pill);padding:8px 16px;font-size:13px;
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.to-top:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .hero h1{font-size:50px}
  .hero-inner{gap:40px}
  .cta-inner{grid-template-columns:1fr;gap:32px;padding:40px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:1023px){
  .sec{padding:76px 0}
  .sec--tight{padding:60px 0}
  .sec-head h2{font-size:32px}
  .hero-inner{grid-template-columns:1fr;padding:40px 0 56px}
  .hero-figure{order:-1}
  .hero-float{left:auto;right:14px;bottom:14px}
  .cards--asym{grid-template-columns:1fr}
  .card--wide{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat{border-bottom:1px solid rgba(243,246,244,.16)}
  .stat:nth-child(2n){border-right:0}
  .check-grid{grid-template-columns:1fr}
}
@media (max-width:767px){
  :root{--head-h:60px}
  .container{padding:0 20px}
  .logo-text{font-size:16px}
  .search{display:none}
  .burger{display:inline-flex}
  .nav-links{
    position:fixed;left:0;right:0;top:var(--head-h);bottom:0;
    flex-direction:column;align-items:stretch;gap:0;margin:0;padding:20px;
    background:var(--surface);border-top:1px solid var(--line);
    transform:translateY(-10px);opacity:0;visibility:hidden;overflow:auto;
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  body.nav-open .nav-links{opacity:1;visibility:visible;transform:none}
  .nav-links a{padding:18px 6px;font-size:20px;font-weight:600;color:var(--text);border-bottom:1px solid var(--line);border-radius:0}
  .nav-links a::after{display:none}
  .nav-links a.active{color:var(--brand)}
  .hero h1{font-size:34px}
  .hero-lead{font-size:16px}
  .hero-cta .btn{width:100%}
  .sec-head h2{font-size:26px}
  .cta-copy h2{font-size:26px}
  .cta-inner{padding:28px 22px}
  .form-card{padding:22px}
  .tl::before{left:14px}
  .tl-item{padding-left:52px}
  .tl-item::before{left:8px;top:7px;width:13px;height:13px}
  .stat b{font-size:44px}
  .faq-q{font-size:16.5px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{margin-top:64px;padding-top:56px}
}
@media (max-width:479px){
  .hero h1{font-size:30px}
  .hero-float{padding:10px 14px;min-width:150px}
  .hero-float b{font-size:22px}
  .stats{grid-template-columns:1fr}
  .stat{border-right:0!important}
  .related a{width:100%;justify-content:space-between}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --brand:#0B4F45;--brand-deep:#073A33;--ink-bg:#0A2622;
  --accent:#C9F24D;--danger:#C0442B;--success:#1F7A5A;
  --bg:#F7F6F2;--surface:#FFFFFF;--surface-2:#EFEDE7;--line:#E2DFD6;
  --text:#12181A;--text-muted:#5C6663;--text-invert:#F3F6F4;
  --r-sm:8px;--r-md:12px;--r-lg:20px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(16,24,26,.06);
  --sh-2:0 8px 24px -12px rgba(16,24,26,.18);
  --sh-3:0 24px 60px -24px rgba(10,38,34,.35);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-latin:"Inter","Space Grotesk",system-ui,sans-serif;
  --ease:cubic-bezier(.2,.8,.2,1);
  --sec:110px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-cn);font-size:16px;line-height:1.75;font-weight:400}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.15}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid rgba(11,79,69,.4);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(min-width:1440px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(247,246,242,.88);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid transparent;transition:border-color .24s var(--ease),background .24s var(--ease)}
.site-header.is-stuck{border-bottom-color:var(--line);background:rgba(247,246,242,.96)}
.nav{display:flex;align-items:center;gap:28px;height:64px}
.site-header.is-stuck .nav{height:56px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;flex-shrink:0}
.logo-mark{width:28px;height:28px;border-radius:8px;background:var(--brand);color:var(--accent);display:grid;place-items:center;font-family:var(--font-latin);font-weight:800;font-size:14px}
.logo-text{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-links a{position:relative;padding:8px 12px;border-radius:var(--r-sm);font-size:14.5px;color:var(--text-muted);transition:color .18s var(--ease),background .18s var(--ease)}
.nav-links a:hover{color:var(--text);background:var(--surface-2)}
.nav-links a.active{color:var(--text);font-weight:600}
.nav-links a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--brand);border-radius:2px}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.search{position:relative;display:flex;align-items:center;gap:8px;width:264px;height:40px;padding:0 10px 0 12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);color:var(--text-muted);transition:border-color .18s var(--ease),box-shadow .18s var(--ease)}
.search:focus-within{border-color:var(--brand);box-shadow:var(--sh-1)}
.search input{border:0;background:transparent;outline:none;width:100%;font-size:14px}
.search input::placeholder{color:#9AA29F}
.kbd{font-family:var(--font-latin);font-size:11px;line-height:1;padding:4px 5px;border:1px solid var(--line);border-radius:5px;background:var(--surface-2);color:var(--text-muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:10px;border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease)}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0);box-shadow:none}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--brand);background:var(--surface-2)}
.btn--sm{height:40px;padding:0 16px;font-size:14px}
.nav-cta{height:40px;padding:0 18px;font-size:14px}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface);align-items:center;justify-content:center;cursor:pointer}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px}
.link-arrow svg{transition:transform .2s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- hero ---------- */
.page-hero{padding:56px 0 64px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%)}
.crumbs{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-muted);margin-bottom:22px}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:#B9BEB9}
.crumbs .current{color:var(--text-muted)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-latin);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);background:rgba(11,79,69,.07);border-radius:var(--r-pill);padding:6px 12px;margin-bottom:20px}
.page-hero h1{font-size:54px;line-height:1.06;margin-bottom:22px}
.page-hero h1 em{font-style:normal;position:relative;white-space:nowrap}
.page-hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:9px;background:var(--accent);z-index:-1;border-radius:2px}
.hero-lead{font-size:17px;color:var(--text-muted);max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.trust-row span{font-size:14px;color:var(--text-muted);border:1px solid var(--line);border-radius:var(--r-pill);padding:6px 14px;background:var(--surface)}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-2);aspect-ratio:4/3;background:var(--surface-2)}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-float{position:absolute;left:18px;bottom:18px;background:rgba(255,255,255,.95);border:1px solid var(--line);border-radius:var(--r-md);padding:12px 16px;box-shadow:var(--sh-1)}
.hero-float b{display:block;font-family:var(--font-latin);font-size:24px;line-height:1;color:var(--brand)}
.hero-float small{font-size:12px;color:var(--text-muted)}

/* ---------- sections ---------- */
section.block{padding:var(--sec) 0}
section.block.tight{padding:72px 0}
.block-head{max-width:720px;margin-bottom:44px}
.block-head .num{font-family:var(--font-latin);font-size:13px;letter-spacing:.1em;color:var(--brand);display:block;margin-bottom:12px}
.block-head h2{font-size:38px;margin-bottom:16px}
.block-head p{color:var(--text-muted);font-size:16.5px}
.rule{width:44px;height:3px;background:var(--brand);border-radius:3px;margin-bottom:18px}

/* ---------- table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--sh-1)}
table.compare{width:100%;min-width:760px;border-collapse:collapse;font-size:15px}
table.compare th,table.compare td{padding:18px 22px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
table.compare thead th{background:var(--surface-2);font-size:13px;letter-spacing:.04em;color:var(--text-muted);font-weight:600;white-space:nowrap}
table.compare tbody tr:last-child td{border-bottom:0}
table.compare tbody tr:hover{background:#FBFAF7}
table.compare td:first-child{font-weight:600;color:var(--text)}
.tag{display:inline-block;font-size:12px;letter-spacing:.04em;padding:3px 10px;border-radius:var(--r-pill);background:rgba(11,79,69,.08);color:var(--brand);white-space:nowrap}
.tag--warn{background:rgba(192,68,43,.1);color:var(--danger)}
.tag--ok{background:rgba(31,122,90,.1);color:var(--success)}

/* ---------- card grid ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:26px;box-shadow:var(--sh-1);transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);display:flex;flex-direction:column;gap:12px}
.card:hover{border-color:var(--brand);transform:translateY(-4px);box-shadow:var(--sh-2)}
.card .ic{width:38px;height:38px;border-radius:10px;background:var(--surface-2);display:grid;place-items:center;color:var(--brand)}
.card h3{font-size:20px;font-weight:600;line-height:1.35}
.card p{font-size:15px;color:var(--text-muted)}
.card .card-foot{margin-top:auto;padding-top:8px}

/* ---------- steps ---------- */
.steps{display:grid;gap:0;border-top:1px solid var(--line)}
.step{display:grid;grid-template-columns:88px 1fr;gap:24px;padding:28px 0;border-bottom:1px solid var(--line);position:relative}
.step .idx{font-family:var(--font-latin);font-size:22px;font-weight:800;color:var(--brand)}
.step h3{font-size:20px;font-weight:600;margin-bottom:8px}
.step p{color:var(--text-muted);font-size:15.5px;max-width:760px}
.step::before{content:"";position:absolute;left:0;top:-1px;height:1px;width:0;background:var(--brand);transition:width .3s var(--ease)}
.step:hover::before{width:100%}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 0;cursor:pointer;list-style:none;font-size:18px;font-weight:600}
.faq summary::-webkit-details-marker{display:none}
.faq summary .pm{flex-shrink:0;width:22px;height:22px;position:relative}
.faq summary .pm::before,.faq summary .pm::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .24s var(--ease)}
.faq summary .pm::before{left:0;top:10px;width:22px;height:2px}
.faq summary .pm::after{left:10px;top:0;width:2px;height:22px}
.faq details[open] summary .pm::after{transform:rotate(90deg);opacity:0}
.faq details p{padding:0 0 24px;color:var(--text-muted);font-size:15.5px;max-width:820px}
.faq details[open] summary{color:var(--brand)}

/* ---------- CTA ---------- */
.cta-band{background:var(--ink-bg);color:var(--text-invert);border-radius:var(--r-lg);padding:52px;display:grid;grid-template-columns:1.4fr .6fr;gap:32px;align-items:center}
.cta-band h2{font-size:32px;margin-bottom:14px}
.cta-band p{color:rgba(243,246,244,.7);font-size:16px;max-width:620px}
.cta-band .btn--light{background:var(--accent);color:#10221B}
.cta-band .btn--light:hover{background:#D8FF63;transform:translateY(-1px);box-shadow:var(--sh-2)}
.cta-band .actions{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.sib{padding-top:40px;display:flex;flex-wrap:wrap;align-items:center;gap:20px;font-size:15px;color:var(--text-muted)}
.sib a{color:var(--brand);font-weight:600;border-bottom:1px solid rgba(11,79,69,.25);padding-bottom:2px;transition:border-color .2s var(--ease)}
.sib a:hover{border-color:var(--brand)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-bg);color:var(--text-invert);padding:72px 0 0;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:48px;border-bottom:1px solid rgba(243,246,244,.14)}
.foot-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;margin-bottom:14px}
.foot-about{color:rgba(243,246,244,.66);font-size:14.5px;max-width:340px}
.foot-col h4{font-size:14px;font-weight:600;letter-spacing:.04em;color:rgba(243,246,244,.55);margin-bottom:16px}
.foot-col a,.foot-col p{display:block;font-size:14.5px;color:rgba(243,246,244,.82);margin-bottom:10px;transition:color .18s var(--ease)}
.foot-col a:hover{color:var(--accent)}
.foot-bottom{display:flex;flex-wrap:wrap;align-items:center;gap:18px;padding:22px 0 26px;font-size:13.5px;color:rgba(243,246,244,.6)}
.foot-bottom a:hover{color:var(--accent)}
.to-top{margin-left:auto;background:transparent;border:1px solid rgba(243,246,244,.25);color:var(--text-invert);height:36px;padding:0 16px;border-radius:var(--r-pill);font-size:13.5px;cursor:pointer;transition:border-color .2s var(--ease),color .2s var(--ease)}
.to-top:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:1199px){
  :root{--sec:88px}
  .page-hero h1{font-size:46px}
  .hero-grid{gap:32px}
  .nav-links a{padding:8px 9px;font-size:14px}
  .search{width:200px}
}
@media(max-width:1023px){
  .nav-links,.search,.nav-cta{display:none}
  .burger{display:inline-flex}
  .hero-grid{grid-template-columns:1fr}
  .hero-media{aspect-ratio:16/9}
  .cards{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:40px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .nav.open .nav-links{display:flex;position:fixed;left:0;right:0;top:64px;flex-direction:column;align-items:flex-start;gap:6px;background:var(--surface);border-bottom:1px solid var(--line);padding:20px 24px 26px;box-shadow:var(--sh-2)}
  .nav.open .nav-links a{font-size:18px;font-weight:600;color:var(--text);padding:10px 0;width:100%}
  .nav.open .nav-links a.active::after{left:0;right:auto;width:28px;bottom:6px}
}
@media(max-width:767px){
  :root{--sec:60px}
  .container{padding:0 20px}
  .page-hero{padding:36px 0 48px}
  .page-hero h1{font-size:34px}
  .hero-lead{font-size:16px}
  .block-head h2{font-size:27px}
  .cards{grid-template-columns:1fr}
  .step{grid-template-columns:56px 1fr;gap:14px}
  .step .idx{font-size:18px}
  .cta-band h2{font-size:25px}
  .faq summary{font-size:16.5px}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .to-top{margin-left:0}
}
@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}