/* roulang page: index */
:root{
    --bg-900:#060A12;
    --bg-800:#0A1120;
    --surface:rgba(255,255,255,.045);
    --stroke:rgba(120,220,255,.14);
    --stroke-strong:rgba(23,208,200,.42);
    --brand:#17D0C8;
    --brand-600:#0FB3AC;
    --accent:#F2B23C;
    --ok:#3FCF8E;
    --warn:#FF8A5B;
    --text-1:#EAF2F8;
    --text-2:#A8B8C6;
    --text-3:#6F8292;
    --r-card:16px;
    --r-lg:24px;
    --r-btn:12px;
    --glow:0 0 0 1px rgba(23,208,200,.35), 0 8px 30px -8px rgba(23,208,200,.55);
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:var(--bg-900);
    color:var(--text-1);
    font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button,input,select,textarea{font:inherit;color:inherit;}
  ul{margin:0;padding:0;list-style:none;}
  p{margin:0;}
  h1,h2,h3,h4{margin:0;letter-spacing:-.01em;}
  ::selection{background:rgba(23,208,200,.32);color:#fff;}
  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-track{background:#050810;}
  ::-webkit-scrollbar-thumb{background:#173C46;border-radius:8px;}
  ::-webkit-scrollbar-thumb:hover{background:#1E5A63;}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
  .num{font-variant-numeric:tabular-nums;}

  /* ---------- 通用容器与分区 ---------- */
  .wrap{max-width:1280px;margin:0 auto;padding:0 16px;}
  @media(min-width:640px){.wrap{padding:0 24px;}}
  @media(min-width:1024px){.wrap{padding:0 32px;}}
  .section{padding:64px 0;}
  @media(min-width:768px){.section{padding:88px 0;}}
  @media(min-width:1024px){.section{padding:112px 0;}}
  .sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px;}
  h2.sec-title{font-size:clamp(24px,3.2vw,36px);line-height:1.2;font-weight:700;}
  .sec-sub{color:var(--text-2);font-size:15px;margin-top:12px;max-width:640px;line-height:1.8;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;letter-spacing:.04em;color:var(--brand);
    background:rgba(23,208,200,.08);border:1px solid rgba(23,208,200,.24);
    border-radius:999px;padding:6px 14px;margin-bottom:20px;
  }
  .dot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px rgba(23,208,200,.9);}
  .hr-line{height:1px;background:linear-gradient(90deg,transparent,var(--stroke),transparent);border:0;margin:0;}

  /* ---------- 顶部导航 ---------- */
  .site-header{position:sticky;top:0;z-index:60;transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;background:transparent;border-bottom:1px solid transparent;}
  .site-header.scrolled{background:rgba(6,10,18,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom-color:var(--stroke);}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px;}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{
    width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
    background:linear-gradient(140deg,rgba(23,208,200,.22),rgba(23,208,200,.04));
    border:1px solid rgba(23,208,200,.35);
    box-shadow:0 0 22px -8px rgba(23,208,200,.75);
  }
  .brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap;}
  .brand-text em{font-style:normal;color:var(--brand);}
  .nav-links{display:none;align-items:center;gap:4px;}
  .nav-link{position:relative;padding:9px 14px;border-radius:10px;font-size:15px;font-weight:500;color:var(--text-2);transition:color .2s,background .2s;}
  .nav-link:hover{color:var(--text-1);background:var(--surface);}
  .nav-link.active{color:var(--brand);}
  .nav-link.active::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;background:var(--brand);box-shadow:0 0 12px rgba(23,208,200,.85);}
  .nav-right{display:flex;align-items:center;gap:12px;}
  .cmd-search{display:none;align-items:center;gap:10px;width:288px;height:42px;padding:0 12px;border-radius:12px;background:var(--surface);border:1px solid var(--stroke);transition:border-color .2s,box-shadow .2s;}
  .cmd-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,208,200,.14);}
  .cmd-search input{flex:1;background:transparent;border:0;outline:none;font-size:14px;color:var(--text-1);min-width:0;}
  .cmd-search input::placeholder{color:var(--text-3);}
  .kbd{font-size:11px;color:var(--text-3);border:1px solid var(--stroke);border-radius:6px;padding:1px 6px;line-height:1.6;}
  .nav-quick{display:none;font-size:14px;color:var(--text-2);padding:8px 10px;border-radius:10px;transition:color .2s,background .2s;}
  .nav-quick:hover{color:var(--brand);background:var(--surface);}
  .nav-toggle{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:var(--surface);border:1px solid var(--stroke);cursor:pointer;}
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--text-1);border-radius:2px;position:relative;}
  .nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-1);border-radius:2px;}
  .nav-toggle span::before{top:-6px;}
  .nav-toggle span::after{top:6px;}
  @media(min-width:1024px){
    .nav-links{display:flex;}
    .cmd-search{display:flex;}
    .nav-quick{display:block;}
    .nav-toggle{display:none;}
  }
  .mobile-drawer{
    position:fixed;inset:0;z-index:80;display:none;flex-direction:column;gap:6px;
    padding:22px 20px 32px;background:rgba(6,10,18,.96);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);overflow-y:auto;
  }
  .mobile-drawer.open{display:flex;}
  .mobile-drawer .drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
  .drawer-close{width:44px;height:44px;border-radius:12px;background:var(--surface);border:1px solid var(--stroke);cursor:pointer;font-size:20px;line-height:1;color:var(--text-2);}
  .drawer-link{padding:15px 14px;border-radius:12px;font-size:16px;font-weight:500;color:var(--text-2);border:1px solid transparent;}
  .drawer-link:hover{background:var(--surface);color:var(--text-1);}
  .drawer-link.active{color:var(--brand);border-color:rgba(23,208,200,.28);background:rgba(23,208,200,.06);}
  .drawer-search{display:flex;align-items:center;gap:10px;height:46px;padding:0 14px;border-radius:12px;background:var(--surface);border:1px solid var(--stroke);margin-bottom:14px;}
  .drawer-search input{flex:1;background:transparent;border:0;outline:none;font-size:15px;min-width:0;}
  .drawer-cta{margin-top:auto;padding-top:20px;}

  /* ---------- 按钮 ---------- */
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease,filter .2s ease;white-space:nowrap;}
  .btn-primary{background:linear-gradient(135deg,#1EE0D7,#0FB3AC);color:#04211F;box-shadow:var(--glow);}
  .btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(23,208,200,.5),0 12px 38px -8px rgba(23,208,200,.7);}
  .btn-primary:active{transform:translateY(0) scale(.985);}
  .btn-ghost{background:transparent;border-color:var(--stroke);color:var(--text-1);}
  .btn-ghost:hover{border-color:var(--stroke-strong);color:var(--brand);}
  .btn-ghost:active{transform:scale(.985);}
  .btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:10px;}
  .btn-block{width:100%;}
  .link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);}
  .link-arrow svg{transition:transform .22s ease;}
  .link-arrow:hover svg{transform:translateX(4px);}
  .btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;cursor:not-allowed;}

  /* ---------- 卡片 ---------- */
  .card{background:var(--bg-700);border:1px solid var(--stroke);border-radius:var(--r-card);transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;overflow:hidden;}
  .card:hover{transform:translateY(-3px);border-color:rgba(23,208,200,.36);box-shadow:0 18px 40px -22px rgba(0,0,0,.9),0 0 0 1px rgba(23,208,200,.12);}
  .glass{background:var(--surface);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--stroke);border-radius:var(--r-lg);}
  .badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px;background:rgba(23,208,200,.1);border:1px solid rgba(23,208,200,.26);color:var(--brand);}
  .badge-gold{background:rgba(242,178,60,.1);border-color:rgba(242,178,60,.3);color:var(--accent);}
  .badge-plain{background:var(--surface);border-color:var(--stroke);color:var(--text-2);}
  .clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}

  /* ---------- Hero ---------- */
  .hero{position:relative;overflow:hidden;padding:72px 0 64px;border-bottom:1px solid var(--stroke);}
  .hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:.55;}
  .hero-veil{position:absolute;inset:0;background:
    radial-gradient(900px 480px at 78% 12%,rgba(23,208,200,.16),transparent 62%),
    linear-gradient(102deg,rgba(6,10,18,.96) 0%,rgba(6,10,18,.86) 42%,rgba(6,10,18,.68) 100%);}
  .hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(120,220,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,220,255,.05) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(700px 420px at 70% 30%,#000,transparent 78%);-webkit-mask-image:radial-gradient(700px 420px at 70% 30%,#000,transparent 78%);}
  .hero-inner{position:relative;z-index:2;}
  .hero h1{font-size:clamp(30px,5.2vw,54px);line-height:1.12;font-weight:700;letter-spacing:-.02em;}
  .hero h1 em{font-style:normal;color:var(--brand);text-shadow:0 0 34px rgba(23,208,200,.45);}
  .hero-sub{margin-top:22px;font-size:clamp(15px,1.6vw,18px);line-height:1.85;color:var(--text-2);max-width:620px;}
  .hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
  .trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px;}
  .trust-chip{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2);background:var(--surface);border:1px solid var(--stroke);border-radius:999px;padding:7px 14px;}
  .hero-panel{padding:26px;border-radius:var(--r-lg);}
  .panel-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 0;border-bottom:1px dashed rgba(120,220,255,.13);}
  .panel-row:last-of-type{border-bottom:0;}
  .panel-label{font-size:14px;color:var(--text-2);}
  .panel-value{font-size:15px;font-weight:600;}
  .progress{height:6px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden;margin-top:8px;}
  .progress i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#17D0C8,#8FF3EE);box-shadow:0 0 14px rgba(23,208,200,.75);}
  .stat-mini{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:18px;}
  .stat-mini div{background:rgba(255,255,255,.03);border:1px solid var(--stroke);border-radius:12px;padding:12px 14px;}
  .stat-mini b{display:block;font-size:20px;color:var(--brand);font-variant-numeric:tabular-nums;}
  .stat-mini span{font-size:12px;color:var(--text-3);}

  /* ---------- 步骤 ---------- */
  .steps-grid{position:relative;display:grid;gap:22px;}
  @media(min-width:768px){.steps-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
  .steps-grid::before{content:"";position:absolute;top:38px;left:8%;right:8%;height:1px;background:linear-gradient(90deg,transparent,rgba(23,208,200,.32),transparent);display:none;}
  @media(min-width:768px){.steps-grid::before{display:block;}}
  .step-card{position:relative;z-index:1;padding:26px 24px 24px;border-radius:var(--r-card);background:var(--bg-700);border:1px solid var(--stroke);transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;}
  .step-card:hover{transform:translateY(-4px);border-color:var(--stroke-strong);box-shadow:0 20px 44px -26px rgba(0,0,0,.95);}
  .step-num{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:17px;font-weight:700;color:var(--brand);border:1px solid rgba(23,208,200,.36);background:rgba(23,208,200,.07);font-variant-numeric:tabular-nums;}
  .step-name{margin-top:18px;font-size:19px;font-weight:600;}
  .step-desc{margin-top:10px;font-size:15px;color:var(--text-2);line-height:1.8;}

  /* ---------- 能力 / 适用场景 ---------- */
  .feature-split{display:grid;gap:36px;align-items:center;}
  @media(min-width:1024px){.feature-split{grid-template-columns:0.95fr 1.05fr;gap:56px;}}
  .feature-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--stroke);}
  .feature-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
  .feature-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,18,.05),rgba(6,10,18,.7));}
  .feature-tag{position:absolute;left:18px;bottom:18px;z-index:2;font-size:13px;color:var(--text-1);background:rgba(6,10,18,.72);border:1px solid var(--stroke);border-radius:999px;padding:7px 14px;backdrop-filter:blur(8px);}
  .feature-list{display:grid;gap:16px;margin-top:28px;}
  .feature-item{display:flex;gap:16px;padding:18px;border-radius:14px;background:rgba(255,255,255,.028);border:1px solid var(--stroke);transition:border-color .22s ease,background .22s ease;}
  .feature-item:hover{border-color:rgba(23,208,200,.34);background:rgba(23,208,200,.045);}
  .fi-icon{flex-shrink:0;width:40px;height:40px;border-radius:11px;display:grid;place-items:center;background:rgba(23,208,200,.09);border:1px solid rgba(23,208,200,.24);color:var(--brand);}
  .fi-title{font-size:16px;font-weight:600;}
  .fi-text{margin-top:6px;font-size:14px;color:var(--text-2);line-height:1.75;}

  /* ---------- 指标条 ---------- */
  .metrics{display:grid;gap:16px;margin-bottom:36px;}
  @media(min-width:640px){.metrics{grid-template-columns:repeat(3,1fr);}}
  .metric{padding:24px;border-radius:var(--r-card);background:var(--surface);border:1px solid var(--stroke);backdrop-filter:blur(12px);}
  .metric b{display:block;font-size:clamp(26px,3.4vw,38px);font-weight:700;color:var(--accent);line-height:1.2;font-variant-numeric:tabular-nums;text-shadow:0 0 26px rgba(242,178,60,.28);}
  .metric span{display:block;margin-top:8px;font-size:13px;color:var(--text-2);}

  /* ---------- 案例非对称网格 ---------- */
  .case-grid{display:grid;gap:22px;}
  @media(min-width:768px){.case-grid{grid-template-columns:repeat(2,1fr);}}
  @media(min-width:1024px){.case-grid{grid-template-columns:repeat(4,1fr);grid-template-rows:auto auto;}}
  .case-card{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--stroke);min-height:200px;transition:transform .25s ease,border-color .25s ease;}
  .case-card:hover{transform:translateY(-3px);border-color:rgba(23,208,200,.36);}
  .case-card img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;}
  .case-card .case-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,18,.15),rgba(6,10,18,.92));}
  .case-body{position:relative;z-index:2;padding:20px;height:100%;display:flex;flex-direction:column;justify-content:flex-end;}
  .case-big{grid-column:span 1;min-height:280px;}
  @media(min-width:768px){.case-big{grid-column:span 2;}}
  @media(min-width:1024px){.case-big{grid-column:span 2;grid-row:span 2;min-height:420px;}}
  .case-title{font-size:17px;font-weight:600;line-height:1.5;}
  .case-big .case-title{font-size:24px;}
  .case-desc{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.7;}
  .case-kpi{display:flex;gap:18px;margin-top:16px;flex-wrap:wrap;}
  .case-kpi div{font-size:13px;color:var(--text-2);}
  .case-kpi b{display:block;font-size:18px;color:var(--brand);font-variant-numeric:tabular-nums;}

  /* ---------- 资讯列表（CMS） ---------- */
  .news-grid{display:grid;gap:22px;}
  @media(min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr);}}
  @media(min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr);}}
  .news-card{display:flex;flex-direction:column;background:var(--bg-700);border:1px solid var(--stroke);border-radius:var(--r-card);overflow:hidden;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;height:100%;}
  .news-card:hover{transform:translateY(-3px);border-color:rgba(23,208,200,.36);box-shadow:0 20px 44px -26px rgba(0,0,0,.95);}
  .news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,#0E2A30,#0A1120);}
  .news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
  .news-card:hover .news-thumb img{transform:scale(1.04);}
  .news-thumb .news-badge{position:absolute;left:12px;top:12px;z-index:2;}
  .news-body{padding:20px;display:flex;flex-direction:column;flex:1;}
  .news-title{font-size:17px;font-weight:600;line-height:1.55;}
  .news-title a:hover{color:var(--brand);}
  .news-desc{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.75;}
  .news-foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3);border-top:1px dashed rgba(120,220,255,.12);}
  .empty-state{padding:56px 24px;text-align:center;border:1px dashed var(--stroke);border-radius:var(--r-lg);background:rgba(255,255,255,.02);}
  .empty-state svg{color:var(--text-3);margin:0 auto 14px;}
  .empty-state p{color:var(--text-2);font-size:15px;margin-bottom:18px;}

  /* ---------- FAQ ---------- */
  .faq-layout{display:grid;gap:32px;}
  @media(min-width:1024px){.faq-layout{grid-template-columns:0.72fr 1.28fr;gap:48px;}}
  .faq-side{padding:28px;border-radius:var(--r-lg);height:fit-content;position:sticky;top:96px;}
  .faq-side h3{font-size:20px;font-weight:700;}
  .faq-side p{margin-top:12px;font-size:14px;color:var(--text-2);line-height:1.8;}
  .faq-item{border:1px solid var(--stroke);border-radius:14px;background:var(--bg-700);margin-bottom:12px;overflow:hidden;transition:border-color .22s ease,box-shadow .22s ease;}
  .faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;font-size:16px;font-weight:600;min-height:44px;}
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{content:"+";font-size:20px;line-height:1;color:var(--brand);transition:transform .25s ease;flex-shrink:0;}
  .faq-item[open]{border-color:rgba(23,208,200,.4);border-left:2px solid var(--brand);box-shadow:0 0 26px -14px rgba(23,208,200,.85);}
  .faq-item[open] summary::after{transform:rotate(45deg);}
  .faq-item:hover{border-color:rgba(23,208,200,.3);}
  .faq-answer{padding:0 20px 20px;font-size:15px;color:var(--text-2);line-height:1.85;}

  /* ---------- CTA 表单 ---------- */
  .cta-band{position:relative;overflow:hidden;border-radius:var(--r-lg);border:1px solid var(--stroke);background:var(--bg-800);}
  .cta-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.35;}
  .cta-veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(6,10,18,.94),rgba(6,10,18,.76));}
  .cta-inner{position:relative;z-index:2;display:grid;gap:36px;padding:40px 26px;}
  @media(min-width:768px){.cta-inner{padding:52px 44px;}}
  @media(min-width:1024px){.cta-inner{grid-template-columns:1fr 1fr;gap:56px;padding:56px 52px;}}
  .form-grid{display:grid;gap:16px;}
  @media(min-width:640px){.form-grid .col-2{display:grid;grid-template-columns:1fr 1fr;gap:16px;}}
  .field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:8px;}
  .field input,.field select,.field textarea{width:100%;background:#080E1A;border:1px solid var(--stroke);border-radius:var(--r-btn);padding:12px 14px;font-size:15px;color:var(--text-1);transition:border-color .2s ease,box-shadow .2s ease;outline:none;}
  .field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
  .field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,208,200,.16);}
  .field textarea{min-height:104px;resize:vertical;}
  .field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#6F8292 50%),linear-gradient(135deg,#6F8292 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 14px) 20px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;padding-right:40px;}
  .privacy-note{margin-top:14px;font-size:12.5px;color:var(--text-3);line-height:1.7;}
  .form-note{margin-top:12px;font-size:14px;color:var(--ok);min-height:20px;}
  .cta-points{display:grid;gap:14px;margin-top:26px;}
  .cta-point{display:flex;gap:12px;font-size:15px;color:var(--text-2);line-height:1.75;}
  .cta-point svg{flex-shrink:0;margin-top:5px;color:var(--brand);}

  /* ---------- 页脚 ---------- */
  .site-footer{margin-top:0;background:#04070D;border-top:1px solid var(--stroke);padding:64px 0 0;}
  .foot-grid{display:grid;gap:36px;}
  @media(min-width:640px){.foot-grid{grid-template-columns:repeat(2,1fr);}}
  @media(min-width:1024px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;}}
  .foot-title{font-size:15px;font-weight:600;margin-bottom:18px;color:var(--text-1);}
  .foot-links{display:grid;gap:11px;}
  .foot-links a{font-size:14px;color:var(--text-2);transition:color .2s ease,padding-left .2s ease;}
  .foot-links a:hover{color:var(--brand);padding-left:4px;}
  .foot-desc{font-size:14px;color:var(--text-2);line-height:1.8;margin-top:14px;max-width:340px;}
  .foot-bottom{margin-top:56px;border-top:1px solid rgba(120,220,255,.1);padding:22px 0;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);}
  .foot-bottom a{color:var(--text-3);}
  .foot-bottom a:hover{color:var(--brand);}

  @media(max-width:520px){
    .hero{padding:52px 0 48px;}
    .hero-cta .btn{width:100%;}
    .metric b{font-size:26px;}
  }

/* roulang page: category1 */
:root{
  --bg-900:#060A12;
  --bg-800:#0A1120;
  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(255,255,255,.03);
  --stroke:rgba(120,220,255,.14);
  --brand:#17D0C8;
  --brand-600:#0FB3AC;
  --brand-dim:rgba(23,208,200,.35);
  --accent:#F2B23C;
  --ok:#3FCF8E;
  --warn:#FF8A5B;
  --text-1:#EAF2F8;
  --text-2:#A8B8C6;
  --text-3:#6F8292;
  --r-card:16px;
  --r-lg:24px;
  --r-btn:12px;
  --glow:0 0 0 1px rgba(23,208,200,.35), 0 8px 30px -8px rgba(23,208,200,.55);
  --shadow-1:0 1px 2px rgba(0,0,0,.3);
  --shadow-2:0 14px 34px -22px rgba(0,0,0,.85);
  --shadow-3:0 26px 60px -28px rgba(23,208,200,.45);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:rgba(23,208,200,.28);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#05080F}
::-webkit-scrollbar-thumb{background:rgba(23,208,200,.28);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:rgba(23,208,200,.5)}
:focus-visible{outline:2px solid rgba(23,208,200,.75);outline-offset:2px;border-radius:8px}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.tnum{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:transparent;
  transition:background .28s ease, box-shadow .28s ease, border-color .28s ease;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(6,10,18,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--stroke);
  box-shadow:0 12px 30px -24px rgba(0,0,0,.9);
}
.nav-inner{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(23,208,200,.1);
  border:1px solid rgba(23,208,200,.32);
  box-shadow:inset 0 0 16px -6px rgba(23,208,200,.6);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-text em{font-style:normal;color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;
  padding:9px 14px;
  border-radius:10px;
  font-size:15px;font-weight:500;
  color:var(--text-2);
  transition:color .2s ease, background .2s ease;
  white-space:nowrap;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.nav-link.active{color:var(--text-1)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--brand);
  box-shadow:0 0 10px 1px rgba(23,208,200,.7);
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.cmd-search{
  display:flex;align-items:center;gap:8px;
  width:272px;height:40px;padding:0 12px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--stroke);
  border-radius:12px;
  transition:border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.cmd-search:focus-within{border-color:var(--brand-dim);box-shadow:0 0 0 3px rgba(23,208,200,.14);background:rgba(255,255,255,.07)}
.cmd-search input{
  flex:1;min-width:0;background:transparent;border:0;outline:0;
  font-size:14px;color:var(--text-1);
}
.cmd-search input::placeholder{color:var(--text-3)}
.kbd{
  font-size:11px;color:var(--text-3);
  border:1px solid var(--stroke);border-radius:6px;
  padding:1px 6px;line-height:1.5;flex-shrink:0;
}
.nav-quick{font-size:14px;color:var(--text-2);padding:8px 6px;transition:color .2s ease}
.nav-quick:hover{color:var(--brand)}
.nav-toggle{
  display:none;width:44px;height:44px;
  align-items:center;justify-content:center;
  background:rgba(255,255,255,.05);
  border:1px solid var(--stroke);border-radius:12px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-1);position:relative;transition:.2s}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-1);transition:.22s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);
  font-weight:600;font-size:15px;
  padding:12px 22px;
  min-height:44px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .22s ease, filter .2s ease, border-color .2s ease, background .2s ease, color .2s ease;
}
.btn-sm{padding:9px 16px;font-size:14px;min-height:40px}
.btn-primary{
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-600) 100%);
  color:#04140F;
  box-shadow:var(--glow);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(23,208,200,.5),0 14px 36px -10px rgba(23,208,200,.72)}
.btn-primary:active{transform:translateY(0) scale(.985);box-shadow:0 0 0 1px rgba(23,208,200,.35),0 6px 18px -10px rgba(23,208,200,.5)}
.btn-ghost{background:rgba(255,255,255,.02);border-color:var(--stroke);color:var(--text-1)}
.btn-ghost:hover{border-color:rgba(23,208,200,.6);background:rgba(23,208,200,.07);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0) scale(.985)}
.btn[disabled],.btn.disabled{opacity:.45;box-shadow:none;cursor:not-allowed}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:500}
.link-arrow svg{transition:transform .2s ease}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:64px 0 72px;
  background-image:linear-gradient(180deg,rgba(6,10,18,.86) 0%,rgba(6,10,18,.94) 70%,var(--bg-900) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--stroke);
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,220,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,220,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse at 70% 20%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at 70% 20%,#000 0%,transparent 72%);
}
.hero .wrap{position:relative;z-index:2}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.crumb a:hover{color:var(--brand)}
.crumb .sep{opacity:.55}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  font-size:13px;color:var(--brand);
  background:rgba(23,208,200,.08);
  border:1px solid rgba(23,208,200,.28);
  margin-bottom:20px;
}
.hero-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 8px 2px rgba(23,208,200,.7)}
.hero h1{
  font-size:clamp(32px,5.2vw,56px);
  line-height:1.12;
  letter-spacing:-.02em;
  font-weight:700;
  max-width:16em;
}
.hero-sub{
  margin-top:20px;
  font-size:17px;
  line-height:1.85;
  color:var(--text-2);
  max-width:44em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.trust-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;
  font-size:13px;color:var(--text-2);
  background:rgba(255,255,255,.04);
  border:1px solid var(--stroke);
}
.trust-chip b{color:var(--accent);font-variant-numeric:tabular-nums;font-weight:700}

/* ---------- section base ---------- */
.section{padding:88px 0}
.section-alt{background:var(--bg-800);border-top:1px solid var(--stroke);border-bottom:1px solid var(--stroke)}
.sec-head{max-width:46em;margin-bottom:44px}
.sec-eyebrow{font-size:13px;letter-spacing:.14em;color:var(--brand);text-transform:uppercase;margin-bottom:12px;font-variant-numeric:tabular-nums}
.sec-head h2{font-size:clamp(24px,3.2vw,36px);line-height:1.2;font-weight:700;letter-spacing:-.01em}
.sec-head p{margin-top:14px;color:var(--text-2);font-size:16px;line-height:1.85}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- lane layout ---------- */
.lane-layout{display:grid;grid-template-columns:256px minmax(0,1fr);gap:32px;align-items:start}
.lane-toc{
  position:sticky;top:96px;
  padding:20px 16px;
  border-radius:20px;
  background:var(--surface-2);
  border:1px solid var(--stroke);
}
.lane-toc-title{font-size:13px;letter-spacing:.14em;color:var(--text-3);padding:0 10px 12px}
.lane-toc a{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;margin-bottom:2px;
  font-size:14px;color:var(--text-2);
  border-left:2px solid transparent;
  border-radius:0 10px 10px 0;
  transition:color .18s ease, background .18s ease, border-color .18s ease;
}
.lane-toc a span.num{font-size:12px;color:var(--text-3);font-variant-numeric:tabular-nums}
.lane-toc a:hover{color:var(--text-1);background:rgba(255,255,255,.05);border-left-color:var(--brand)}
.lane-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.glass-card{
  position:relative;
  display:flex;flex-direction:column;gap:12px;
  padding:22px 22px 20px;
  border-radius:var(--r-card);
  background:var(--surface);
  border:1px solid var(--stroke);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  box-shadow:var(--shadow-2);
  transition:transform .22s ease, border-color .22s ease, box-shadow .22s ease, background .22s ease;
}
.glass-card:hover{
  transform:translateY(-3px);
  border-color:rgba(23,208,200,.5);
  background:rgba(23,208,200,.06);
  box-shadow:var(--shadow-3);
}
.glass-card .card-no{
  font-size:12px;letter-spacing:.16em;color:var(--accent);
  font-variant-numeric:tabular-nums;font-weight:700;
}
.glass-card h3{font-size:18px;line-height:1.35;font-weight:600}
.glass-card p{font-size:14.5px;line-height:1.75;color:var(--text-2)}
.glass-card .card-foot{margin-top:auto;padding-top:6px;display:flex;align-items:center;justify-content:space-between}
.glass-card .card-foot em{font-style:normal;font-size:12px;color:var(--text-3)}
.mini-tag{
  display:inline-block;padding:2px 10px;border-radius:999px;
  font-size:12px;color:var(--brand);
  background:rgba(23,208,200,.08);border:1px solid rgba(23,208,200,.24);
}
.mini-tag.gold{color:var(--accent);background:rgba(242,178,60,.09);border-color:rgba(242,178,60,.3)}

/* ---------- scene ---------- */
.scene-grid{display:grid;grid-template-columns:1.02fr 1fr;gap:44px;align-items:center}
.scene-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--stroke);box-shadow:var(--shadow-2)}
.scene-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.scene-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,18,.05) 0%,rgba(6,10,18,.72) 100%);
}
.scene-media .media-cap{
  position:absolute;left:20px;right:20px;bottom:18px;z-index:2;
  font-size:13px;color:var(--text-2);
}
.scene-list{display:grid;gap:18px;margin-top:28px}
.scene-item{
  display:flex;gap:14px;
  padding:16px 18px;
  border-radius:14px;
  background:var(--surface-2);
  border:1px solid var(--stroke);
  transition:border-color .2s ease, background .2s ease;
}
.scene-item:hover{border-color:rgba(23,208,200,.42);background:rgba(23,208,200,.05)}
.scene-item .ico{
  flex-shrink:0;width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(23,208,200,.1);border:1px solid rgba(23,208,200,.26);
}
.scene-item h3{font-size:16px;font-weight:600;margin-bottom:2px}
.scene-item p{font-size:14px;color:var(--text-2);line-height:1.75}

/* ---------- flow strip ---------- */
.flow-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.flow-cell{
  position:relative;
  padding:22px 20px;
  border-radius:var(--r-card);
  background:var(--surface-2);
  border:1px solid var(--stroke);
  transition:border-color .2s ease, transform .2s ease;
}
.flow-cell:hover{border-color:rgba(23,208,200,.45);transform:translateY(-2px)}
.flow-cell .bar{
  height:3px;border-radius:3px;margin-bottom:18px;
  background:linear-gradient(90deg,var(--brand) 0%,rgba(23,208,200,.06) 100%);
  box-shadow:0 0 12px -2px rgba(23,208,200,.6);
}
.flow-cell .step-no{font-size:12px;letter-spacing:.16em;color:var(--text-3);font-variant-numeric:tabular-nums}
.flow-cell h3{font-size:17px;font-weight:600;margin:8px 0 8px}
.flow-cell p{font-size:14px;color:var(--text-2);line-height:1.75}

/* ---------- issue list ---------- */
.issue-list{display:grid;gap:14px}
.issue-item{
  display:grid;grid-template-columns:52px minmax(0,1fr) auto;gap:18px;align-items:center;
  padding:18px 22px;
  border-radius:14px;
  background:var(--surface-2);
  border:1px solid var(--stroke);
  transition:border-color .2s ease, background .2s ease;
}
.issue-item:hover{border-color:rgba(23,208,200,.4);background:rgba(23,208,200,.04)}
.issue-item .code{
  font-size:13px;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;letter-spacing:.06em;
}
.issue-item h3{font-size:16px;font-weight:600;margin-bottom:3px}
.issue-item p{font-size:14px;color:var(--text-2);line-height:1.75}
.issue-item .status{
  font-size:12px;padding:4px 12px;border-radius:999px;white-space:nowrap;
  color:var(--ok);background:rgba(63,207,142,.09);border:1px solid rgba(63,207,142,.3);
}
.issue-item .status.warn{color:var(--warn);background:rgba(255,138,91,.09);border-color:rgba(255,138,91,.3)}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:14px;max-width:900px}
.faq-item{
  border-radius:14px;
  background:var(--surface-2);
  border:1px solid var(--stroke);
  overflow:hidden;
  transition:border-color .2s ease, background .2s ease;
}
.faq-item[open]{border-color:rgba(23,208,200,.42);background:rgba(23,208,200,.045)}
.faq-item summary{
  cursor:pointer;list-style:none;
  display:flex;align-items:center;gap:14px;
  padding:18px 22px;
  font-size:16px;font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .q-bar{
  width:2px;align-self:stretch;min-height:22px;border-radius:2px;
  background:var(--stroke);transition:background .22s ease, box-shadow .22s ease;
}
.faq-item[open] summary .q-bar{background:var(--brand);box-shadow:0 0 12px 1px rgba(23,208,200,.7)}
.faq-item summary .chev{
  margin-left:auto;flex-shrink:0;
  transition:transform .24s ease;color:var(--text-3);
}
.faq-item[open] summary .chev{transform:rotate(45deg);color:var(--brand)}
.faq-body{padding:0 22px 20px 38px;color:var(--text-2);font-size:15px;line-height:1.8}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  padding:48px 44px;
  background-image:linear-gradient(120deg,rgba(6,10,18,.9) 0%,rgba(6,10,18,.95) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border:1px solid rgba(23,208,200,.3);
  box-shadow:var(--shadow-3);
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(600px 240px at 92% 8%,rgba(23,208,200,.18),transparent 70%);
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.25}
.cta-inner p{margin-top:10px;color:var(--text-2);font-size:15px;max-width:38em}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.back-home{font-size:14px;color:var(--text-3);display:inline-flex;align-items:center;gap:6px}
.back-home:hover{color:var(--brand)}

/* ---------- footer ---------- */
.site-footer{
  background:#04070D;
  border-top:1px solid var(--stroke);
  padding:64px 0 28px;
  margin-top:0;
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px}
.foot-title{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:16px}
.foot-links{display:grid;gap:10px}
.foot-links a{font-size:14px;color:var(--text-2);transition:color .18s ease}
.foot-links a:hover{color:var(--brand)}
.foot-desc{font-size:14px;color:var(--text-2);line-height:1.8;margin-top:14px;max-width:26em}
.foot-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid var(--stroke);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .cmd-search{display:none}
  .nav-quick{display:none}
  .nav-links.open{
    display:flex;flex-direction:column;
    position:fixed;left:0;right:0;top:60px;bottom:0;
    padding:20px 24px 40px;gap:6px;
    background:rgba(6,10,18,.95);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    overflow-y:auto;border-top:1px solid var(--stroke);
  }
  .nav-links.open .nav-link{
    padding:15px 16px;font-size:16px;border-radius:12px;
    background:rgba(255,255,255,.04);
  }
  .nav-links.open .nav-link.active::after{display:none}
  .nav-inner{height:60px;gap:14px}
  .lane-layout{grid-template-columns:minmax(0,1fr);gap:24px}
  .lane-toc{position:static}
  .lane-toc .toc-list{display:flex;flex-wrap:wrap;gap:6px}
  .lane-toc a{border-left:0;border-radius:999px;background:rgba(255,255,255,.04);padding:7px 14px}
  .lane-toc a:hover{border-left:0}
  .scene-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .flow-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .section{padding:68px 0}
}
@media (max-width:768px){
  .lane-grid{grid-template-columns:minmax(0,1fr)}
  .hero{padding:44px 0 52px}
  .hero-sub{font-size:16px}
  .issue-item{grid-template-columns:minmax(0,1fr);gap:8px}
  .issue-item .status{justify-self:start}
  .cta-band{padding:34px 24px}
  .sec-head{margin-bottom:32px}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  .flow-strip{grid-template-columns:minmax(0,1fr)}
  .foot-grid{grid-template-columns:minmax(0,1fr)}
  .hero-actions .btn{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .brand-text{font-size:16px}
  .section{padding:56px 0}
}

/* roulang page: article */
:root{
  --bg-900:#060A12;
  --bg-800:#0A1120;
  --card:#0C1424;
  --surface:rgba(255,255,255,.045);
  --stroke:rgba(120,220,255,.14);
  --brand:#17D0C8;
  --brand-600:#0FB3AC;
  --accent:#F2B23C;
  --ok:#3FCF8E;
  --warn:#FF8A5B;
  --text-1:#EAF2F8;
  --text-2:#A8B8C6;
  --text-3:#6F8292;
  --radius-card:16px;
  --radius-lg:24px;
  --radius-btn:12px;
  --shadow-1:0 1px 2px rgba(0,0,0,.45);
  --shadow-2:0 14px 34px -20px rgba(0,0,0,.9);
  --shadow-3:0 28px 64px -28px rgba(0,0,0,.95);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--bg-900);
  background-image:
    radial-gradient(900px 520px at 10% -12%,rgba(23,208,200,.11),transparent 62%),
    radial-gradient(720px 440px at 92% 0%,rgba(242,178,60,.07),transparent 66%);
  background-repeat:no-repeat;
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease,transform .18s ease}
img{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit;color:inherit}
::selection{background:rgba(23,208,200,.32);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#070C16}
::-webkit-scrollbar-thumb{background:#1B2B40;border-radius:999px;border:2px solid #070C16}
::-webkit-scrollbar-thumb:hover{background:#26405C}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
@media(min-width:640px){.wrap{padding:0 24px}}
@media(min-width:1024px){.wrap{padding:0 32px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;cursor:pointer;border-radius:var(--radius-btn);
  font-weight:600;line-height:1;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,filter .18s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#19DDD4,#0FB3AC);
  color:#032321;
  box-shadow:0 0 0 1px rgba(23,208,200,.35),0 10px 26px -14px rgba(23,208,200,.95);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(23,208,200,.55),0 16px 36px -14px rgba(23,208,200,1)}
.btn-primary:active{transform:translateY(0) scale(.985)}
.btn-ghost{background:rgba(255,255,255,.02);border:1px solid var(--stroke);color:var(--text-1)}
.btn-ghost:hover{border-color:rgba(23,208,200,.6);color:var(--brand);background:rgba(23,208,200,.07)}
.btn-ghost:active{transform:scale(.985)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-md{padding:12px 22px;font-size:15px}
.btn-lg{padding:15px 26px;font-size:16px}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn[disabled]{opacity:.45;box-shadow:none;cursor:not-allowed}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(6,10,18,.74);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--stroke);
}
.nav-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(140deg,rgba(23,208,200,.24),rgba(23,208,200,.05));
  border:1px solid rgba(23,208,200,.35);
  box-shadow:inset 0 0 12px rgba(23,208,200,.2);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-text em{font-style:normal;color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-link{
  position:relative;padding:9px 12px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--text-2);white-space:nowrap;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.nav-link.active{color:var(--text-1)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  border-radius:2px;background:var(--brand);box-shadow:0 0 12px rgba(23,208,200,.75);
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.cmd-search{
  display:flex;align-items:center;gap:8px;width:268px;padding:8px 12px;
  border-radius:12px;background:var(--surface);border:1px solid var(--stroke);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.cmd-search:focus-within{border-color:rgba(23,208,200,.6);box-shadow:0 0 0 3px rgba(23,208,200,.15)}
.cmd-search input{flex:1;min-width:0;background:transparent;border:0;outline:0;font-size:14px;color:var(--text-1)}
.cmd-search input::placeholder{color:var(--text-3)}
.kbd{flex:0 0 auto;font-size:11px;color:var(--text-3);border:1px solid var(--stroke);border-radius:6px;padding:1px 6px;background:rgba(255,255,255,.03)}
.nav-quick{font-size:14px;color:var(--text-2);padding:8px 4px}
.nav-quick:hover{color:var(--brand)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--stroke);background:var(--surface);position:relative;cursor:pointer}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:var(--text-1);
  transform:translateX(-50%);transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span{top:calc(50% - 1px)}
.nav-toggle span::before{content:"";top:-6px}
.nav-toggle span::after{content:"";top:6px}

.drawer{
  position:fixed;inset:0;z-index:90;display:none;flex-direction:column;gap:18px;
  padding:20px;background:rgba(6,10,18,.95);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
}
.drawer.is-open{display:flex}
.drawer-top{display:flex;align-items:center;justify-content:space-between;gap:16px}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--stroke);
  background:var(--surface);color:var(--text-1);font-size:22px;line-height:1;cursor:pointer;
}
.drawer-close:hover{border-color:rgba(23,208,200,.6);color:var(--brand)}
.drawer-search{width:100%}
.drawer-links{display:flex;flex-direction:column;gap:8px}
.drawer-links a{
  padding:14px;border-radius:12px;border:1px solid var(--stroke);
  background:var(--surface);font-size:16px;color:var(--text-1);
}
.drawer-links a:hover{border-color:rgba(23,208,200,.55);color:var(--brand)}
.drawer-cta{margin-top:auto;display:flex;flex-direction:column;gap:12px}

/* ---------- 文章头 ---------- */
.post-hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--stroke);
  background-image:linear-gradient(rgba(6,10,18,.86),rgba(6,10,18,.95)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.post-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,220,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(120,220,255,.055) 1px,transparent 1px);
  background-size:52px 52px;
}
.post-hero-inner{position:relative;z-index:1;padding:26px 0 44px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{opacity:.5}
.crumbs .cur{color:var(--text-2);max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.post-head{margin-top:22px;max-width:880px}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  background:rgba(23,208,200,.12);border:1px solid rgba(23,208,200,.35);color:var(--brand);
}
.post-title{margin-top:16px;font-size:clamp(28px,4vw,44px);line-height:1.16;font-weight:700;letter-spacing:-.02em}
.post-meta{margin-top:18px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;font-size:13px;color:var(--text-3)}
.post-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.6}
.post-divider{margin-top:24px;height:1px;background:linear-gradient(90deg,rgba(23,208,200,.55),rgba(120,220,255,.09) 45%,transparent)}

/* ---------- 主区域 ---------- */
.main{padding:56px 0 80px}
@media(min-width:1024px){.main{padding:72px 0 104px}}
.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:36px;align-items:start}
@media(min-width:1024px){.layout{grid-template-columns:minmax(0,1fr) 320px;gap:48px}}
.article-main{min-width:0}

/* ---------- 正文排版 ---------- */
.article-body{max-width:780px;font-size:17px;line-height:1.9;color:#DCE7F0}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.15em}
.article-body h2{
  position:relative;margin:2.4em 0 .8em;padding-left:14px;
  font-size:clamp(21px,2.4vw,27px);line-height:1.35;font-weight:700;color:var(--text-1);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;border-radius:3px;
  background:var(--brand);box-shadow:0 0 14px rgba(23,208,200,.8);
}
.article-body h3{margin:1.8em 0 .6em;font-size:20px;line-height:1.4;font-weight:600;color:var(--text-1)}
.article-body h4{margin:1.5em 0 .5em;font-size:17px;font-weight:600;color:var(--text-1)}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.3em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:.45em 0}
.article-body li::marker{color:var(--brand)}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(23,208,200,.45)}
.article-body a:hover{text-decoration-color:var(--brand)}
.article-body strong{color:#fff;font-weight:600}
.article-body blockquote{
  margin:1.6em 0;padding:16px 20px;border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;background:rgba(255,255,255,.045);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);color:var(--text-2);
}
.article-body img{margin:1.5em auto;border-radius:14px;border:1px solid var(--stroke)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{margin-top:10px;text-align:center;font-size:12px;color:var(--text-3)}
.article-body table{
  display:block;width:100%;overflow-x:auto;margin:1.6em 0;
  border-collapse:collapse;font-size:15px;
}
.article-body th,.article-body td{padding:10px 14px;border-bottom:1px solid var(--stroke);text-align:left;white-space:nowrap}
.article-body th{color:var(--text-2);font-weight:600;background:rgba(255,255,255,.03)}
.article-body pre{
  margin:1.6em 0;padding:16px;border-radius:12px;background:#070C16;
  border:1px solid var(--stroke);overflow-x:auto;font-size:14px;line-height:1.7;
}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.article-body p code,.article-body li code{
  padding:2px 6px;border-radius:6px;font-size:.92em;
  background:rgba(23,208,200,.1);border:1px solid rgba(23,208,200,.22);color:var(--brand);
}
.article-body hr{margin:2em 0;border:0;height:1px;background:var(--stroke)}

/* ---------- 正文底部 ---------- */
.post-foot{
  margin-top:40px;padding-top:22px;border-top:1px solid var(--stroke);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
}
.post-foot .tip{font-size:13px;color:var(--text-3);max-width:420px;line-height:1.7}

/* ---------- 空态 ---------- */
.empty{
  margin:8px 0;padding:44px 24px;text-align:center;
  border:1px dashed var(--stroke);border-radius:var(--radius-card);background:rgba(255,255,255,.02);
}
.empty-icon{margin:0 auto 16px;width:48px;height:48px;display:flex;align-items:center;justify-content:center;border-radius:14px;background:rgba(23,208,200,.1);border:1px solid rgba(23,208,200,.3)}
.empty-title{font-size:17px;font-weight:600;color:var(--text-1)}
.empty-text{margin-top:8px;font-size:14px;color:var(--text-2)}
.empty .btn{margin-top:20px}

/* ---------- 侧栏 ---------- */
.side{display:flex;flex-direction:column;gap:18px}
@media(min-width:1024px){.side{position:sticky;top:96px}}
.side-card{background:var(--card);border:1px solid var(--stroke);border-radius:var(--radius-card);padding:18px;box-shadow:var(--shadow-1)}
.side-title{font-size:15px;font-weight:600;color:var(--text-1);display:flex;align-items:center;gap:8px}
.side-title::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand)}
.side-list{margin-top:14px;display:flex;flex-direction:column;gap:6px}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:10px;font-size:14px;color:var(--text-2);
  background:rgba(255,255,255,.02);border:1px solid transparent;
}
.side-list a:hover{color:var(--text-1);border-color:var(--stroke);background:rgba(255,255,255,.055)}
.side-list a .arrow{color:var(--brand);transition:transform .18s ease}
.side-list a:hover .arrow{transform:translateX(4px)}
.side-note{margin-top:12px;font-size:13px;line-height:1.75;color:var(--text-3)}
.side-cta{margin-top:14px;display:flex;flex-direction:column;gap:10px}

/* ---------- 相关推荐 ---------- */
.related{margin-top:72px}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.section-title{font-size:clamp(20px,2.4vw,26px);font-weight:700;letter-spacing:-.01em}
.section-desc{margin-top:8px;font-size:14px;color:var(--text-2);max-width:640px}
.more-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--brand)}
.more-link:hover{gap:10px}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
@media(max-width:1023px){.rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:639px){.rel-grid{grid-template-columns:1fr}}

.card{
  display:flex;flex-direction:column;height:100%;overflow:hidden;
  background:var(--card);border:1px solid var(--stroke);border-radius:var(--radius-card);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.card:hover{transform:translateY(-3px);border-color:rgba(23,208,200,.45);box-shadow:var(--shadow-2)}
.card-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,#123040,#0A1120)}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-thumb img{transform:scale(1.05)}
.card-badge{
  position:absolute;top:12px;left:12px;padding:4px 10px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--brand);
  background:rgba(6,10,18,.78);border:1px solid rgba(23,208,200,.4);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.card-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{
  font-size:16px;line-height:1.5;font-weight:600;color:var(--text-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-text{
  font-size:13px;line-height:1.75;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  margin-top:auto;padding-top:12px;border-top:1px solid rgba(120,220,255,.08);
  display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text-3);
}
.card-foot .arrow{color:var(--brand);transition:transform .18s ease}
.card:hover .card-foot .arrow{transform:translateX(4px)}

/* ---------- CTA 条 ---------- */
.cta-strip{
  margin-top:64px;position:relative;overflow:hidden;
  border-radius:var(--radius-lg);border:1px solid rgba(23,208,200,.3);
  background-image:linear-gradient(100deg,rgba(6,10,18,.94),rgba(6,10,18,.72)),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-3);
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;padding:30px}
.cta-title{font-size:clamp(19px,2.2vw,25px);font-weight:700;line-height:1.35}
.cta-text{margin-top:10px;font-size:14px;line-height:1.8;color:var(--text-2);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:88px;border-top:1px solid var(--stroke);background:#040810;padding-top:56px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
@media(max-width:1023px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:639px){.foot-grid{grid-template-columns:1fr}}
.foot-title{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:14px}
.foot-links{display:flex;flex-direction:column;gap:10px}
.foot-links a{font-size:14px;color:var(--text-2)}
.foot-links a:hover{color:var(--brand)}
.foot-desc{font-size:14px;line-height:1.8;color:var(--text-2);max-width:330px}
.foot-bottom{
  margin-top:44px;padding:20px 0;border-top:1px solid var(--stroke);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media(max-width:1023px){
  .nav-links{display:none}
  .nav-right .cmd-search{display:none}
  .nav-quick{display:none}
  .nav-toggle{display:block}
  .nav-inner{height:62px;gap:12px}
}
@media(max-width:639px){
  .brand-text{font-size:16px}
  .nav-right .btn-primary{display:none}
  .post-hero-inner{padding:18px 0 34px}
  .main{padding:40px 0 64px}
  .cta-inner{padding:22px 18px}
}
@media(max-width:520px){
  .post-title{font-size:26px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .empty .btn{width:100%}
}

/* roulang page: category2 */
:root{
  --bg-900:#060A12;
  --bg-800:#0A1120;
  --surface:rgba(255,255,255,.045);
  --stroke:rgba(120,220,255,.14);
  --brand:#17D0C8;
  --brand-600:#0FB3AC;
  --accent:#F2B23C;
  --ok:#3FCF8E;
  --warn:#FF8A5B;
  --text-1:#EAF2F8;
  --text-2:#A8B8C6;
  --text-3:#6F8292;
  --r-card:16px;
  --r-lg:24px;
  --r-sm:12px;
  --shadow-1:0 1px 2px rgba(0,0,0,.45);
  --shadow-2:0 14px 34px -14px rgba(0,0,0,.75);
  --shadow-3:0 28px 64px -22px rgba(0,0,0,.88);
  --glow:0 0 0 1px rgba(23,208,200,.35), 0 8px 30px -8px rgba(23,208,200,.55);
}
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(680px 420px at 12% -6%, rgba(23,208,200,.10), transparent 65%),
    radial-gradient(520px 380px at 96% 4%, rgba(242,178,60,.06), transparent 62%);
  background-repeat:no-repeat;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
button,input,select,textarea{ font:inherit; color:inherit; }
::selection{ background:rgba(23,208,200,.28); color:#fff; }
:focus-visible{ outline:2px solid var(--brand); outline-offset:2px; border-radius:6px; }
::-webkit-scrollbar{ width:10px; height:10px; }
::-webkit-scrollbar-track{ background:#050810; }
::-webkit-scrollbar-thumb{ background:rgba(23,208,200,.28); border-radius:8px; }
::-webkit-scrollbar-thumb:hover{ background:rgba(23,208,200,.5); }

.wrap{ width:100%; max-width:1240px; margin:0 auto; padding:0 20px; }
.num{ font-variant-numeric:tabular-nums; }

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:80;
  border-bottom:1px solid transparent;
  transition:background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
}
.site-header.scrolled{
  background:rgba(6,10,18,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--stroke);
}
.nav-inner{ height:72px; display:flex; align-items:center; gap:26px; }
.brand{ display:inline-flex; align-items:center; gap:10px; }
.brand-mark{
  width:34px; height:34px; border-radius:10px; display:grid; place-items:center;
  background:rgba(23,208,200,.10); border:1px solid rgba(23,208,200,.30);
  transition:box-shadow .2s ease, transform .2s ease;
}
.brand:hover .brand-mark{ box-shadow:var(--glow); transform:translateY(-1px); }
.brand-text{ font-size:17px; font-weight:700; letter-spacing:.01em; color:var(--text-1); white-space:nowrap; }
.brand-text em{ font-style:normal; color:var(--brand); }
.nav-links{ display:flex; align-items:center; gap:2px; }
.nav-link{
  position:relative; padding:8px 12px; font-size:15px; font-weight:500; color:var(--text-2);
  border-radius:10px; transition:color .18s ease, background .18s ease;
}
.nav-link:hover{ color:var(--text-1); background:rgba(255,255,255,.05); }
.nav-link.active{ color:var(--text-1); }
.nav-link.active::after{
  content:""; position:absolute; left:12px; right:12px; bottom:2px; height:2px; border-radius:2px;
  background:var(--brand); box-shadow:0 0 8px rgba(23,208,200,.85);
}
.nav-right{ display:flex; align-items:center; gap:14px; margin-left:auto; }
.cmd-search{
  display:flex; align-items:center; gap:8px; width:290px; height:40px; padding:0 12px;
  border-radius:var(--r-sm); background:var(--surface); border:1px solid var(--stroke);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.cmd-search:focus-within{ border-color:var(--brand); box-shadow:0 0 0 3px rgba(23,208,200,.16); }
.cmd-search input{ flex:1; min-width:0; background:transparent; border:0; outline:none; font-size:14px; }
.cmd-search input::placeholder{ color:var(--text-3); }
.kbd{
  font-size:11px; color:var(--text-3); border:1px solid var(--stroke);
  border-radius:6px; padding:1px 5px; line-height:1.5;
}
.nav-quick{ font-size:14px; color:var(--text-2); padding:6px 4px; transition:color .18s ease; }
.nav-quick:hover{ color:var(--brand); }
.nav-toggle{
  display:none; width:44px; height:44px; align-items:center; justify-content:center;
  background:var(--surface); border:1px solid var(--stroke); border-radius:var(--r-sm); cursor:pointer;
}
.nav-toggle span{ position:relative; width:18px; height:2px; border-radius:2px; background:var(--text-1); transition:.2s ease; }
.nav-toggle span::before,.nav-toggle span::after{
  content:""; position:absolute; left:0; width:18px; height:2px; border-radius:2px; background:var(--text-1); transition:.2s ease;
}
.nav-toggle span::before{ top:-6px; }
.nav-toggle span::after{ top:6px; }
.site-header.open .nav-toggle span{ background:transparent; }
.site-header.open .nav-toggle span::before{ top:0; transform:rotate(45deg); }
.site-header.open .nav-toggle span::after{ top:0; transform:rotate(-45deg); }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  height:44px; padding:0 20px; border-radius:var(--r-sm); border:1px solid transparent;
  font-size:15px; font-weight:600; cursor:pointer; white-space:nowrap;
  transition:transform .16s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease, filter .2s ease;
}
.btn-sm{ height:38px; padding:0 16px; font-size:14px; }
.btn-primary{ background:linear-gradient(135deg,#1FE3DA,#0FB3AC); color:#04211F; box-shadow:var(--glow); }
.btn-primary:hover{ transform:translateY(-1px); filter:brightness(1.06); box-shadow:0 0 0 1px rgba(23,208,200,.45),0 14px 36px -8px rgba(23,208,200,.7); }
.btn-primary:active{ transform:translateY(0) scale(.985); }
.btn-primary:disabled{ opacity:.45; box-shadow:none; cursor:not-allowed; }
.btn-ghost{ background:transparent; border-color:var(--stroke); color:var(--text-1); }
.btn-ghost:hover{ border-color:var(--brand); color:#fff; transform:translateY(-1px); }
.btn-ghost:active{ transform:translateY(0) scale(.985); }
.btn-link{ display:inline-flex; align-items:center; gap:6px; color:var(--brand); font-weight:600; font-size:14px; }
.btn-link svg{ transition:transform .2s ease; }
.btn-link:hover svg{ transform:translateX(4px); }

/* ---------- hero ---------- */
.hero{
  position:relative; overflow:hidden; padding:64px 0 84px;
  background-image:
    linear-gradient(180deg, rgba(6,10,18,.84) 0%, rgba(6,10,18,.93) 62%, rgba(6,10,18,.99) 100%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover; background-position:center;
  border-bottom:1px solid var(--stroke);
}
.hero::after{
  content:""; position:absolute; inset:0; pointer-events:none; opacity:.5;
  background-image:
    linear-gradient(rgba(120,220,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,220,255,.06) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(70% 60% at 50% 0%, #000 20%, transparent 88%);
  -webkit-mask-image:radial-gradient(70% 60% at 50% 0%, #000 20%, transparent 88%);
}
.hero .wrap{ position:relative; z-index:2; }
.crumb{ display:flex; align-items:center; gap:8px; font-size:13px; color:var(--text-3); margin-bottom:22px; flex-wrap:wrap; }
.crumb a{ color:var(--text-2); transition:color .18s ease; }
.crumb a:hover{ color:var(--brand); }
.crumb em{ font-style:normal; color:var(--text-1); }
.hero-badge{
  display:inline-flex; align-items:center; gap:8px; height:30px; padding:0 12px; border-radius:999px;
  background:rgba(23,208,200,.10); border:1px solid rgba(23,208,200,.32);
  color:var(--brand); font-size:13px; font-weight:600; letter-spacing:.02em;
}
.dot{ width:6px; height:6px; border-radius:50%; background:var(--brand); box-shadow:0 0 10px rgba(23,208,200,.9); }
h1.hero-title{
  margin:18px 0 16px; font-size:clamp(30px,5vw,52px); line-height:1.14; font-weight:700; letter-spacing:-.02em; max-width:16em;
}
.hero-sub{ color:var(--text-2); font-size:17px; line-height:1.85; max-width:44em; margin:0 0 28px; }
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; align-items:center; }
.hero-meta{ display:flex; gap:12px; flex-wrap:wrap; margin-top:30px; }
.chip{
  display:inline-flex; align-items:center; gap:8px; height:34px; padding:0 14px; border-radius:999px;
  background:var(--surface); border:1px solid var(--stroke); font-size:13px; color:var(--text-2);
}
.chip strong{ color:var(--text-1); font-weight:600; }

/* ---------- sections ---------- */
.section{ padding:88px 0; }
.section-tight{ padding:64px 0; }
.sec-head{ max-width:720px; margin-bottom:40px; }
.sec-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.eyebrow{ font-size:13px; font-weight:600; letter-spacing:.14em; color:var(--brand); text-transform:uppercase; }
h2.sec-title{ margin:12px 0 12px; font-size:clamp(24px,3.2vw,36px); line-height:1.22; font-weight:700; letter-spacing:-.01em; }
.sec-desc{ color:var(--text-2); font-size:16px; margin:0; }

/* ---------- timeline ---------- */
.timeline{ position:relative; max-width:800px; margin:0 auto; }
.timeline::before{
  content:""; position:absolute; left:26px; top:14px; bottom:14px; width:1px;
  background:linear-gradient(180deg, rgba(23,208,200,.75), rgba(23,208,200,.18) 55%, rgba(23,208,200,.04));
}
.tl-item{ position:relative; padding-left:78px; }
.tl-item + .tl-item{ margin-top:48px; }
.tl-num{
  position:absolute; left:0; top:0; width:54px; height:54px; border-radius:16px;
  display:grid; place-items:center; z-index:2;
  background:linear-gradient(180deg, rgba(10,17,32,.98), rgba(6,10,18,.98));
  border:1px solid rgba(23,208,200,.35); color:var(--brand);
  font-size:17px; font-weight:700; font-variant-numeric:tabular-nums;
  box-shadow:0 0 0 1px rgba(23,208,200,.10), 0 10px 26px -14px rgba(23,208,200,.6);
}
.tl-card{
  background:var(--bg-800); border:1px solid var(--stroke); border-radius:var(--r-card);
  padding:22px 24px; box-shadow:var(--shadow-1); transition:border-color .2s ease, transform .2s ease, box-shadow .22s ease;
}
.tl-card:hover{ border-color:rgba(23,208,200,.42); transform:translateY(-2px); box-shadow:var(--shadow-2); }
.tl-top{ display:flex; align-items:center; gap:12px; flex-wrap:wrap; margin-bottom:10px; }
h3.tl-title{ margin:0; font-size:20px; line-height:1.35; font-weight:600; }
.tag{
  display:inline-flex; align-items:center; height:26px; padding:0 10px; border-radius:999px;
  font-size:12px; font-weight:600; border:1px solid rgba(242,178,60,.35); color:var(--accent);
  background:rgba(242,178,60,.08); font-variant-numeric:tabular-nums;
}
.tag-teal{ border-color:rgba(23,208,200,.35); color:var(--brand); background:rgba(23,208,200,.08); }
.tl-text{ color:var(--text-2); margin:0 0 12px; font-size:15.5px; }
.tl-points{ list-style:none; margin:0; padding:0; display:flex; flex-wrap:wrap; gap:10px 20px; }
.tl-points li{ position:relative; padding-left:18px; font-size:14px; color:var(--text-2); }
.tl-points li::before{
  content:""; position:absolute; left:0; top:9px; width:6px; height:6px; border-radius:2px;
  background:var(--brand); opacity:.8;
}

/* ---------- cards ---------- */
.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.card{
  background:var(--bg-800); border:1px solid var(--stroke); border-radius:var(--r-card);
  padding:22px; box-shadow:var(--shadow-1);
  transition:border-color .2s ease, transform .2s ease, box-shadow .22s ease;
}
.card:hover{ border-color:rgba(23,208,200,.4); transform:translateY(-3px); box-shadow:var(--shadow-2); }
.card-ico{
  width:40px; height:40px; border-radius:12px; display:grid; place-items:center; margin-bottom:14px;
  background:rgba(23,208,200,.10); border:1px solid rgba(23,208,200,.26);
}
h3.card-title{ margin:0 0 8px; font-size:17px; font-weight:600; line-height:1.4; }
.card p{ margin:0; color:var(--text-2); font-size:14.5px; }

/* ---------- split ---------- */
.split{ display:grid; grid-template-columns:1.05fr .95fr; gap:44px; align-items:center; }
.figure{
  position:relative; border-radius:var(--r-lg); overflow:hidden;
  border:1px solid var(--stroke); background:var(--bg-800); box-shadow:var(--shadow-3);
}
.figure img{ width:100%; height:100%; object-fit:cover; aspect-ratio:4/3; }
.figure::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(6,10,18,.10), rgba(6,10,18,.68));
}
.fig-cap{
  position:absolute; left:18px; right:18px; bottom:16px; z-index:2;
  font-size:13px; color:var(--text-2);
}
.plain-list{ list-style:none; margin:22px 0 0; padding:0; display:grid; gap:14px; }
.plain-list li{ display:flex; gap:12px; align-items:flex-start; }
.plain-list .mark{
  flex:0 0 auto; width:22px; height:22px; border-radius:7px; display:grid; place-items:center; margin-top:4px;
  background:rgba(63,207,142,.12); border:1px solid rgba(63,207,142,.3); color:var(--ok);
}
.plain-list b{ font-weight:600; color:var(--text-1); }
.plain-list span{ color:var(--text-2); font-size:15px; }

/* ---------- stats ---------- */
.stats{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.stat{
  position:relative; overflow:hidden; padding:26px 24px; border-radius:var(--r-card);
  background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border:1px solid var(--stroke);
}
.stat::before{
  content:""; position:absolute; left:0; top:0; width:100%; height:2px;
  background:linear-gradient(90deg, var(--brand), rgba(23,208,200,0));
}
.stat-val{ font-size:clamp(28px,3.6vw,40px); font-weight:700; color:var(--accent); letter-spacing:-.02em; line-height:1.1; font-variant-numeric:tabular-nums; }
.stat-val small{ font-size:15px; font-weight:600; margin-left:4px; color:var(--accent); }
.stat-label{ margin-top:8px; color:var(--text-2); font-size:14px; }

/* ---------- faq ---------- */
.faq{ display:grid; gap:14px; max-width:900px; margin:0 auto; }
.faq-item{
  border:1px solid var(--stroke); border-radius:var(--r-card); background:var(--bg-800);
  overflow:hidden; transition:border-color .22s ease, box-shadow .22s ease;
}
.faq-item[open]{ border-color:rgba(23,208,200,.45); box-shadow:0 0 0 1px rgba(23,208,200,.14), var(--shadow-2); }
.faq-item summary{
  list-style:none; cursor:pointer; position:relative; padding:18px 54px 18px 22px;
  font-size:16px; font-weight:600; color:var(--text-1); display:flex; align-items:center; gap:14px;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::before{
  content:""; position:absolute; left:0; top:14px; bottom:14px; width:2px; border-radius:2px;
  background:transparent; transition:background .2s ease, box-shadow .2s ease;
}
.faq-item[open] summary::before{ background:var(--brand); box-shadow:0 0 10px rgba(23,208,200,.9); }
.faq-plus{
  position:absolute; right:20px; top:50%; margin-top:-9px; width:18px; height:18px;
  display:grid; place-items:center; color:var(--brand); transition:transform .22s ease;
}
.faq-item[open] .faq-plus{ transform:rotate(45deg); }
.faq-body{ padding:0 22px 20px; color:var(--text-2); font-size:15px; line-height:1.85; }
.faq-body p{ margin:0; }

/* ---------- cta ---------- */
.cta{
  position:relative; overflow:hidden; border-radius:var(--r-lg);
  border:1px solid rgba(23,208,200,.28);
  background-image:
    linear-gradient(120deg, rgba(6,10,18,.9) 0%, rgba(6,10,18,.82) 55%, rgba(10,17,32,.92) 100%),
    url('/assets/images/backpic/back-3.png');
  background-size:cover; background-position:center;
  padding:44px; box-shadow:var(--shadow-3);
}
.cta-grid{ display:grid; grid-template-columns:1fr 1fr; gap:44px; align-items:center; position:relative; z-index:2; }
.cta h2{ margin:0 0 14px; font-size:clamp(24px,3vw,32px); line-height:1.25; font-weight:700; }
.cta p{ color:var(--text-2); margin:0 0 18px; }
.form-panel{
  background:rgba(6,10,18,.72); border:1px solid var(--stroke); border-radius:var(--r-card);
  padding:24px; backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
}
.field{ margin-bottom:14px; }
.field label{ display:block; font-size:13px; color:var(--text-2); margin-bottom:6px; }
.field input,.field select,.field textarea{
  width:100%; background:rgba(6,10,18,.9); border:1px solid var(--stroke);
  border-radius:var(--r-sm); padding:11px 13px; font-size:14.5px; outline:none;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.field input::placeholder,.field textarea::placeholder{ color:var(--text-3); }
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand); box-shadow:0 0 0 3px rgba(23,208,200,.16);
}
.field textarea{ resize:vertical; min-height:82px; }
.form-note{ font-size:12.5px; color:var(--text-3); margin:12px 0 0; }
.form-msg{ display:none; margin-top:12px; font-size:13.5px; color:var(--ok); }
.form-msg.show{ display:block; }

/* ---------- footer ---------- */
.site-footer{
  margin-top:40px; border-top:1px solid var(--stroke); background:#04070E;
  padding:60px 0 0;
}
.foot-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1.1fr; gap:36px; }
.foot-title{ font-size:14px; font-weight:600; color:var(--text-1); margin-bottom:16px; }
.foot-links{ display:grid; gap:10px; }
.foot-links a{ font-size:14px; color:var(--text-2); transition:color .18s ease, transform .18s ease; }
.foot-links a:hover{ color:var(--brand); transform:translateX(3px); }
.foot-desc{ color:var(--text-2); font-size:14px; margin:14px 0 0; max-width:34em; }
.foot-bottom{
  margin-top:48px; border-top:1px solid var(--stroke); padding:20px 0 26px;
  display:flex; justify-content:space-between; gap:14px; flex-wrap:wrap;
  font-size:13px; color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-links{
    position:fixed; left:0; right:0; top:60px; bottom:0; z-index:70;
    flex-direction:column; align-items:stretch; gap:2px; padding:20px;
    background:rgba(6,10,18,.96); backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
    opacity:0; transform:translateY(-8px); pointer-events:none; transition:opacity .22s ease, transform .22s ease;
    overflow-y:auto;
  }
  .site-header.open .nav-links{ opacity:1; transform:none; pointer-events:auto; }
  .nav-link{ padding:15px 12px; font-size:16px; border-bottom:1px solid var(--stroke); border-radius:0; }
  .nav-link.active::after{ left:12px; right:auto; width:22px; bottom:10px; }
  .cmd-search{ display:none; }
  .nav-quick{ display:none; }
  .nav-toggle{ display:flex; }
  .nav-inner{ height:60px; }
  .section{ padding:64px 0; }
  .split{ grid-template-columns:1fr; gap:32px; }
  .cta-grid{ grid-template-columns:1fr; gap:30px; }
  .grid-4{ grid-template-columns:repeat(2,1fr); }
  .foot-grid{ grid-template-columns:1fr 1fr; gap:30px; }
  .cta{ padding:32px; }
}
@media (max-width:768px){
  .grid-3{ grid-template-columns:1fr; }
  .stats{ grid-template-columns:1fr; }
  .hero{ padding:44px 0 60px; }
  .section{ padding:56px 0; }
  .timeline{ padding:0 4px; }
  .timeline::before{ left:20px; }
  .tl-item{ padding-left:60px; }
  .tl-item + .tl-item{ margin-top:40px; }
  .tl-num{ width:42px; height:42px; border-radius:13px; font-size:15px; }
  .tl-card{ padding:18px; }
}
@media (max-width:520px){
  .grid-4{ grid-template-columns:1fr; }
  .foot-grid{ grid-template-columns:1fr; }
  .hero-actions .btn{ width:100%; }
  .hero-meta{ gap:10px; }
  .cta{ padding:22px; border-radius:18px; }
  .form-panel{ padding:18px; }
  .brand-text{ font-size:16px; }
}

/* roulang page: category3 */
:root{
  --bg-900:#060A12;
  --bg-800:#0A1120;
  --surface:rgba(255,255,255,.045);
  --stroke:rgba(120,220,255,.14);
  --brand:#17D0C8;
  --brand-600:#0FB3AC;
  --accent:#F2B23C;
  --ok:#3FCF8E;
  --warn:#FF8A5B;
  --text-1:#EAF2F8;
  --text-2:#A8B8C6;
  --text-3:#6F8292;
  --card:#0C1524;
  --radius:16px;
  --radius-lg:24px;
  --radius-ctl:12px;
  --shadow-1:0 1px 2px rgba(0,0,0,.42);
  --shadow-2:0 14px 34px -16px rgba(0,0,0,.72);
  --shadow-3:0 28px 64px -26px rgba(0,0,0,.82);
  --glow:0 0 0 1px rgba(23,208,200,.35), 0 8px 30px -8px rgba(23,208,200,.55);
  --font: "PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(760px 420px at 12% -6%, rgba(23,208,200,.10), transparent 62%),
    radial-gradient(620px 380px at 92% 8%, rgba(242,178,60,.07), transparent 64%);
  z-index:0;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:rgba(23,208,200,.32);color:#fff}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#070D18}
::-webkit-scrollbar-thumb{background:#16323C;border-radius:8px;border:2px solid #070D18}
::-webkit-scrollbar-thumb:hover{background:#1D4A54}

.wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 16px;position:relative;z-index:1}
@media(min-width:640px){.wrap{padding:0 24px}}
@media(min-width:1024px){.wrap{padding:0 32px}}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .28s ease,border-color .28s ease,backdrop-filter .28s ease;
}
.site-header.is-scrolled{
  background:rgba(6,10,18,.74);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--stroke);
}
.nav-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(23,208,200,.22),rgba(15,179,172,.06));
  border:1px solid rgba(23,208,200,.3);
  box-shadow:inset 0 0 18px rgba(23,208,200,.14);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--text-1);white-space:nowrap}
.brand-text em{font-style:normal;color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:14px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--text-2);padding:6px 2px;transition:color .2s ease}
.nav-link:hover{color:var(--text-1)}
.nav-link.active{color:var(--text-1)}
.nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 12px rgba(23,208,200,.75);
}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.cmd-search{
  display:flex;align-items:center;gap:10px;
  width:280px;height:40px;padding:0 12px;
  border-radius:var(--radius-ctl);
  background:var(--surface);
  border:1px solid var(--stroke);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cmd-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,208,200,.16)}
.cmd-search input{
  flex:1;min-width:0;background:transparent;border:0;outline:none;
  font-size:14px;color:var(--text-1);
}
.cmd-search input::placeholder{color:var(--text-3)}
.kbd{
  font-size:11px;line-height:1;padding:5px 6px;border-radius:6px;
  color:var(--text-3);border:1px solid var(--stroke);background:rgba(255,255,255,.04);
}
.nav-quick{font-size:14px;color:var(--text-2);transition:color .2s ease}
.nav-quick:hover{color:var(--brand)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--radius-ctl);
  background:var(--surface);border:1px solid var(--stroke);cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{position:relative;display:block;width:18px;height:1.6px;background:var(--text-1);border-radius:2px;transition:background .2s ease}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:1.6px;background:var(--text-1);border-radius:2px;transition:transform .26s ease,top .26s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--radius-ctl);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease,filter .22s ease;
  white-space:nowrap;
}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.btn-primary{
  background:linear-gradient(120deg,var(--brand),var(--brand-600));
  color:#04211F;
  box-shadow:0 0 0 1px rgba(23,208,200,.32),0 10px 26px -12px rgba(23,208,200,.7);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:var(--glow)}
.btn-primary:active{transform:translateY(0) scale(.985)}
.btn-ghost{background:transparent;border-color:var(--stroke);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost:active{transform:scale(.985)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);
  font-size:14px;font-weight:600;background:none;border:0;padding:4px 0;cursor:pointer;
}
.btn-text svg{transition:transform .2s ease}
.btn-text:hover svg{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;pointer-events:none}

/* ---------- Breadcrumb ---------- */
.crumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);flex-wrap:wrap}
.crumb a{color:var(--text-2);transition:color .2s ease}
.crumb a:hover{color:var(--brand)}
.crumb span.sep{color:#2C3F4D}
.crumb .now{color:var(--text-1)}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:56px 0 72px;
  border-bottom:1px solid var(--stroke);
  background-image:linear-gradient(rgba(6,10,18,.86),rgba(6,10,18,.95)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(23,208,200,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(23,208,200,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(620px 340px at 24% 30%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(620px 340px at 24% 30%,#000,transparent 72%);
}
.hero-grid{display:grid;gap:40px;align-items:end;position:relative;z-index:2}
@media(min-width:1024px){.hero-grid{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;color:var(--brand);
  border:1px solid rgba(23,208,200,.3);border-radius:999px;
  padding:6px 12px;background:rgba(23,208,200,.07);
}
.dot-red{width:7px;height:7px;border-radius:50%;background:var(--warn);box-shadow:0 0 10px rgba(255,138,91,.9)}
h1.page-title{
  font-size:clamp(32px,5.2vw,54px);
  line-height:1.12;
  letter-spacing:-.02em;
  margin:22px 0 18px;
}
h1.page-title em{font-style:normal;color:var(--brand)}
.lede{font-size:16px;color:var(--text-2);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-aside{
  border-radius:var(--radius-lg);
  border:1px solid var(--stroke);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  padding:22px;
  box-shadow:var(--shadow-3);
}
.aside-title{font-size:13px;color:var(--text-3);letter-spacing:.08em}
.aside-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 0;border-bottom:1px dashed rgba(120,220,255,.14);font-size:14px;color:var(--text-2)}
.aside-row:last-child{border-bottom:0}
.aside-row b{color:var(--text-1);font-weight:600}
.tag-ok{color:var(--ok);font-size:12px;border:1px solid rgba(63,207,142,.34);background:rgba(63,207,142,.1);border-radius:999px;padding:3px 9px}
.tag-warn{color:var(--warn);font-size:12px;border:1px solid rgba(255,138,91,.34);background:rgba(255,138,91,.1);border-radius:999px;padding:3px 9px}

/* ---------- Section basics ---------- */
.section{padding:80px 0}
@media(min-width:1024px){.section{padding:104px 0}}
.section-head{display:flex;flex-wrap:wrap;gap:18px;align-items:flex-end;justify-content:space-between;margin-bottom:40px}
h2.sec-title{font-size:clamp(24px,3.2vw,34px);line-height:1.2}
.sec-sub{color:var(--text-2);max-width:640px;margin-top:10px;font-size:15px}
.divider{height:1px;background:linear-gradient(90deg,rgba(120,220,255,.22),transparent);margin:0}

/* ---------- Metrics ---------- */
.metrics{display:grid;gap:20px;grid-template-columns:1fr}
@media(min-width:768px){.metrics{grid-template-columns:repeat(3,1fr)}}
.metric{
  border-radius:var(--radius);
  border:1px solid var(--stroke);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.015));
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  padding:24px;
  transition:border-color .22s ease,transform .22s ease;
}
.metric:hover{border-color:rgba(23,208,200,.42);transform:translateY(-2px)}
.metric-num{
  font-size:clamp(30px,4vw,42px);font-weight:700;line-height:1.05;color:var(--accent);
  display:flex;align-items:baseline;gap:6px;
}
.metric-num small{font-size:15px;font-weight:500;color:var(--text-2)}
.metric-label{margin-top:10px;font-size:14px;color:var(--text-2)}
.metric-note{margin-top:8px;font-size:12.5px;color:var(--text-3)}

/* ---------- Chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  border:1px solid var(--stroke);border-radius:999px;background:rgba(255,255,255,.03);
  color:var(--text-2);font-size:13.5px;padding:8px 16px;cursor:pointer;
  transition:all .2s ease;
}
.chip:hover{border-color:rgba(23,208,200,.5);color:var(--text-1)}
.chip.is-active{
  color:#04211F;background:linear-gradient(120deg,var(--brand),var(--brand-600));
  border-color:transparent;box-shadow:0 8px 22px -12px rgba(23,208,200,.8);
}

/* ---------- Case grid ---------- */
.case-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media(min-width:768px){.case-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.case-grid{grid-template-columns:repeat(4,1fr)}}
.case{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--stroke);background:var(--card);
  box-shadow:var(--shadow-2);transition:border-color .24s ease,transform .24s ease,box-shadow .24s ease;
  display:flex;flex-direction:column;
}
.case:hover{border-color:rgba(23,208,200,.45);transform:translateY(-3px);box-shadow:var(--shadow-3)}
.case-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#08101C}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;opacity:.9}
.case:hover .case-media img{transform:scale(1.05)}
.case-badge{
  position:absolute;top:12px;left:12px;font-size:12px;padding:4px 10px;border-radius:999px;
  background:rgba(6,10,18,.72);border:1px solid var(--stroke);color:var(--brand);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.case-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.case-body h3{font-size:17px;line-height:1.45}
.case-body p{font-size:14px;color:var(--text-2)}
.case-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--text-3);padding-top:12px;border-top:1px dashed rgba(120,220,255,.14)}
.case-metric{color:var(--accent);font-weight:700}

.case.feature{grid-column:span 1}
@media(min-width:1024px){
  .case.feature{grid-column:span 2;grid-row:span 2}
  .case.feature .case-media{aspect-ratio:16/9}
  .case.feature .case-body{padding:28px}
  .case.feature .case-body h3{font-size:24px}
  .case.feature .case-body p{font-size:15px;max-width:560px}
}
.case.feature .case-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,18,.1),rgba(6,10,18,.82));
}

/* ---------- Distribution bars ---------- */
.split{display:grid;gap:40px;align-items:start}
@media(min-width:1024px){.split{grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr)}}
.bar-item{margin-bottom:22px}
.bar-top{display:flex;justify-content:space-between;font-size:14px;color:var(--text-2);margin-bottom:9px}
.bar-top b{color:var(--text-1);font-weight:600}
.bar{height:8px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid var(--stroke);overflow:hidden}
.bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),rgba(23,208,200,.35))}
.bar i.gold{background:linear-gradient(90deg,var(--accent),rgba(242,178,60,.3))}
.bar i.green{background:linear-gradient(90deg,var(--ok),rgba(63,207,142,.3))}

.notes{display:grid;gap:16px}
.note{
  border:1px solid var(--stroke);border-radius:var(--radius);background:var(--card);
  padding:18px 20px;display:flex;gap:14px;align-items:flex-start;
}
.note i{
  flex:0 0 auto;width:26px;height:26px;border-radius:9px;display:grid;place-items:center;
  border:1px solid rgba(23,208,200,.32);color:var(--brand);font-style:normal;font-size:12px;font-weight:700;
  background:rgba(23,208,200,.08);
}
.note h3{font-size:15.5px;margin-bottom:6px}
.note p{font-size:14px;color:var(--text-2)}

/* ---------- Checklist ---------- */
.check-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:768px){.check-grid{grid-template-columns:repeat(2,1fr)}}
.check{
  display:flex;gap:12px;align-items:flex-start;
  border:1px solid var(--stroke);border-radius:var(--radius);
  background:linear-gradient(150deg,rgba(255,255,255,.05),rgba(255,255,255,.012));
  padding:18px 20px;transition:border-color .22s ease;
}
.check:hover{border-color:rgba(23,208,200,.4)}
.check svg{flex:0 0 auto;margin-top:5px}
.check h3{font-size:15.5px;margin-bottom:5px}
.check p{font-size:13.8px;color:var(--text-2)}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;gap:32px}
@media(min-width:1024px){.faq-wrap{grid-template-columns:minmax(0,.72fr) minmax(0,1.28fr);gap:48px}}
.faq-side{
  border:1px solid var(--stroke);border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.015));
  padding:26px;box-shadow:var(--shadow-2);
}
.faq-side h3{font-size:18px;margin-bottom:10px}
.faq-side p{font-size:14px;color:var(--text-2)}
.faq-list{border:1px solid var(--stroke);border-radius:var(--radius-lg);overflow:hidden;background:rgba(255,255,255,.02)}
details.faq{border-bottom:1px solid rgba(120,220,255,.1)}
details.faq:last-child{border-bottom:0}
details.faq summary{
  list-style:none;cursor:pointer;padding:20px 22px;font-size:16px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  position:relative;transition:color .2s ease;
}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary:hover{color:var(--brand)}
details.faq summary .ic{
  flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .26s ease;
}
details.faq summary .ic::before,details.faq summary .ic::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
details.faq summary .ic::before{left:50%;top:3px;width:1.6px;height:16px;transform:translateX(-50%)}
details.faq summary .ic::after{top:50%;left:3px;height:1.6px;width:16px;transform:translateY(-50%)}
details.faq[open] summary{color:var(--brand)}
details.faq[open] summary .ic{transform:rotate(45deg)}
details.faq[open] summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 12px rgba(23,208,200,.85);
}
.faq-body{padding:0 22px 22px;color:var(--text-2);font-size:14.6px;line-height:1.85}

/* ---------- CTA ---------- */
.cta-band{padding:0 0 88px}
.cta-card{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid rgba(23,208,200,.26);
  background-image:linear-gradient(rgba(6,10,18,.84),rgba(6,10,18,.94)),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  padding:32px;
  display:grid;gap:24px;align-items:center;
  box-shadow:var(--shadow-3);
}
@media(min-width:1024px){.cta-card{grid-template-columns:minmax(0,1fr) auto;padding:44px}}
.cta-card h2{font-size:clamp(22px,2.8vw,30px);line-height:1.25;margin-bottom:12px}
.cta-card p{color:var(--text-2);font-size:15px;max-width:640px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* ---------- Footer ---------- */
.site-footer{
  border-top:1px solid var(--stroke);
  background:#04070E;
  padding:64px 0 28px;
  position:relative;
  z-index:1;
}
.foot-grid{display:grid;gap:36px;grid-template-columns:1fr}
@media(min-width:768px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr}}
.foot-title{font-size:13px;letter-spacing:.12em;color:var(--text-3);margin-bottom:16px}
.foot-links{display:flex;flex-direction:column;gap:11px}
.foot-links a{font-size:14px;color:var(--text-2);transition:color .2s ease,transform .2s ease}
.foot-links a:hover{color:var(--brand);transform:translateX(3px)}
.foot-desc{font-size:14px;color:var(--text-2);max-width:320px;margin-top:14px}
.foot-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(120,220,255,.1);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ---------- Mobile nav drawer ---------- */
@media(max-width:1023px){
  .nav-toggle{display:inline-flex}
  .cmd-search{display:none}
  .nav-quick{display:none}
  .nav-links{
    position:fixed;left:0;right:0;top:72px;bottom:0;margin:0;
    flex-direction:column;align-items:flex-start;gap:6px;
    padding:26px 24px 40px;
    background:rgba(6,10,18,.96);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    border-top:1px solid var(--stroke);
    opacity:0;pointer-events:none;transform:translateY(-10px);
    transition:opacity .26s ease,transform .26s ease;
    overflow-y:auto;
  }
  .nav-links.open{opacity:1;pointer-events:auto;transform:none}
  .nav-link{font-size:19px;font-weight:600;padding:14px 0;width:100%;border-bottom:1px solid rgba(120,220,255,.08)}
  .nav-link.active::after{display:none}
  .nav-link.active{color:var(--brand)}
}
@media(max-width:767px){
  .nav-inner{height:64px}
  .nav-links{top:64px}
  .brand-text{font-size:16px}
  .section{padding:56px 0}
  .page-hero{padding:40px 0 56px}
}

/* roulang page: category4 */
:root{
  --bg-900:#060A12;
  --bg-800:#0A1120;
  --surface:rgba(255,255,255,.045);
  --stroke:rgba(120,220,255,.14);
  --brand:#17D0C8;
  --brand-600:#0FB3AC;
  --accent:#F2B23C;
  --ok:#3FCF8E;
  --warn:#FF8A5B;
  --text-1:#EAF2F8;
  --text-2:#A8B8C6;
  --text-3:#6F8292;
  --r-card:16px;
  --r-lg:24px;
  --r-btn:12px;
  --glow:0 0 0 1px rgba(23,208,200,.35), 0 8px 30px -8px rgba(23,208,200,.55);
  --shadow-1:0 1px 2px rgba(0,0,0,.35);
  --shadow-2:0 12px 30px -18px rgba(0,0,0,.85);
  --shadow-3:0 26px 60px -26px rgba(0,0,0,.95);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 10% -8%,rgba(23,208,200,.10),transparent 62%),
    radial-gradient(760px 460px at 94% 6%,rgba(242,178,60,.07),transparent 60%);
  z-index:0;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul{list-style:none;padding:0}
::selection{background:rgba(23,208,200,.30);color:#03110F}
body.drawer-open{overflow:hidden}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;position:relative;z-index:1}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.scrolled{
  background:rgba(6,10,18,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--stroke);
}
.nav-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;flex:none;
  background:linear-gradient(145deg,rgba(23,208,200,.20),rgba(23,208,200,.04));
  border:1px solid var(--stroke);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--text-1);white-space:nowrap}
.brand-text em{font-style:normal;color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-flex;align-items:center;height:38px;padding:0 14px;border-radius:999px;
  font-size:15px;font-weight:500;color:var(--text-2);
  transition:color .2s ease,background .2s ease,box-shadow .2s ease;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.055)}
.nav-link.active{color:var(--brand);background:rgba(23,208,200,.10);box-shadow:inset 0 -2px 0 var(--brand)}
.nav-right{display:flex;align-items:center;gap:12px;flex:none}
.cmd-search{
  display:flex;align-items:center;gap:8px;width:280px;height:40px;padding:0 12px;
  border-radius:var(--r-btn);background:rgba(255,255,255,.05);border:1px solid var(--stroke);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cmd-search:focus-within{border-color:rgba(23,208,200,.55);box-shadow:0 0 0 3px rgba(23,208,200,.14);background:rgba(255,255,255,.07)}
.cmd-search input{flex:1;min-width:0;background:none;border:0;outline:none;font-size:14px;color:var(--text-1)}
.cmd-search input::placeholder{color:var(--text-3)}
.kbd{font-size:11px;color:var(--text-3);border:1px solid var(--stroke);border-radius:6px;padding:1px 6px;flex:none}
.nav-quick{font-size:14px;color:var(--text-2);transition:color .2s ease}
.nav-quick:hover{color:var(--brand)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;background:var(--surface);
  border:1px solid var(--stroke);cursor:pointer;position:relative;flex:none;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:17px;height:1.6px;background:var(--text-1);border-radius:2px;
  transform:translateX(-50%);transition:.25s ease;
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

.mobile-drawer{
  display:none;position:fixed;left:0;right:0;top:60px;bottom:0;z-index:70;
  background:rgba(6,10,18,.96);backdrop-filter:blur(16px);
  padding:20px;flex-direction:column;gap:8px;overflow-y:auto;
}
.mobile-drawer.open{display:flex}
.mobile-drawer .cmd-search{width:100%;margin-bottom:8px}
.mobile-drawer .nav-link{height:48px;border-radius:12px;font-size:16px;justify-content:flex-start;padding:0 16px}
.mobile-drawer .drawer-cta{margin-top:auto;padding-top:18px;border-top:1px solid var(--stroke)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,filter .22s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-600));
  color:#04140F;box-shadow:var(--glow);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(23,208,200,.45),0 14px 38px -10px rgba(23,208,200,.62)}
.btn-primary:active{transform:translateY(0) scale(.985)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--stroke);color:var(--text-1)}
.btn-ghost:hover{border-color:rgba(23,208,200,.55);background:rgba(23,208,200,.08);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0) scale(.985)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;
}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--stroke);padding:44px 0 72px}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:.26;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,18,.78),rgba(6,10,18,.94) 66%,var(--bg-900));
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:start}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px;flex-wrap:wrap}
.crumb a:hover{color:var(--brand)}
.tag{
  display:inline-flex;align-items:center;gap:7px;height:28px;padding:0 12px;border-radius:999px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:rgba(23,208,200,.10);border:1px solid rgba(23,208,200,.32);
}
.tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px rgba(23,208,200,.9)}
.hero h1{
  margin:18px 0 0;font-size:clamp(30px,4.6vw,50px);line-height:1.14;font-weight:700;letter-spacing:-.02em;
}
.hero h1 strong{color:var(--brand);font-weight:700}
.lead{margin-top:18px;font-size:17px;line-height:1.8;color:var(--text-2);max-width:620px}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
.hero-points{display:flex;gap:22px;margin-top:32px;flex-wrap:wrap;border-top:1px solid var(--stroke);padding-top:22px}
.hero-points li{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text-2)}
.hero-points svg{flex:none}

.hero-panel{
  background:rgba(255,255,255,.045);border:1px solid var(--stroke);border-radius:var(--r-lg);
  padding:22px;backdrop-filter:blur(12px);box-shadow:var(--shadow-3);
}
.panel-title{font-size:13px;letter-spacing:.08em;color:var(--text-3);text-transform:uppercase;margin-bottom:14px}
.panel-search{
  display:flex;align-items:center;gap:10px;height:48px;padding:0 14px;border-radius:var(--r-btn);
  background:rgba(255,255,255,.05);border:1px solid var(--stroke);transition:border-color .2s,box-shadow .2s;
}
.panel-search:focus-within{border-color:rgba(23,208,200,.55);box-shadow:0 0 0 3px rgba(23,208,200,.14)}
.panel-search input{flex:1;min-width:0;background:none;border:0;outline:none;font-size:15px}
.panel-search input::placeholder{color:var(--text-3)}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 13px;border-radius:999px;
  font-size:13px;color:var(--text-2);background:rgba(255,255,255,.045);
  border:1px solid var(--stroke);transition:.2s ease;
}
.chip:hover{color:var(--brand);border-color:rgba(23,208,200,.45);background:rgba(23,208,200,.09)}
.stat-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px;padding-top:20px;border-top:1px solid var(--stroke)}
.stat-strip div{text-align:center}
.stat-strip b{display:block;font-size:22px;font-weight:700;color:var(--accent);line-height:1.3}
.stat-strip span{font-size:12px;color:var(--text-3)}

/* ---------- sections ---------- */
.section{padding:88px 0;position:relative}
.section.tight{padding:64px 0}
.sec-head{max-width:720px;margin-bottom:38px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-kicker{font-size:13px;font-weight:600;letter-spacing:.10em;color:var(--brand);text-transform:uppercase;margin-bottom:12px}
.sec-title{font-size:clamp(24px,3.2vw,34px);line-height:1.22;font-weight:700;letter-spacing:-.01em}
.sec-desc{margin-top:14px;font-size:15px;line-height:1.85;color:var(--text-2)}

.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.quick-card{
  position:relative;display:block;padding:26px 24px;border-radius:var(--r-card);
  background:rgba(255,255,255,.04);border:1px solid var(--stroke);
  transition:transform .22s ease,border-color .22s ease,background .22s ease,box-shadow .22s ease;
}
.quick-card:hover{transform:translateY(-3px);border-color:rgba(23,208,200,.5);background:rgba(23,208,200,.06);box-shadow:var(--shadow-2)}
.quick-num{
  font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--brand);
  border:1px solid rgba(23,208,200,.4);border-radius:999px;padding:2px 11px;display:inline-block;
}
.quick-card h3{margin-top:16px;font-size:19px;font-weight:600}
.quick-card p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--text-2)}
.quick-more{display:inline-flex;align-items:center;gap:7px;margin-top:18px;font-size:14px;font-weight:600;color:var(--brand)}
.quick-card:hover .quick-more svg{transform:translateX(4px)}
.quick-more svg{transition:transform .2s ease}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:280px 1fr;gap:44px;align-items:start}
.faq-side{position:sticky;top:100px}
.faq-side-list{display:flex;flex-direction:column;gap:6px;margin-top:6px}
.faq-side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 14px;border-radius:12px;font-size:14px;color:var(--text-2);
  border:1px solid transparent;transition:.2s ease;
}
.faq-side-list a:hover{color:var(--text-1);background:rgba(255,255,255,.045);border-color:var(--stroke)}
.faq-side-note{
  margin-top:20px;padding:18px;border-radius:var(--r-card);
  background:rgba(255,255,255,.045);border:1px solid var(--stroke);font-size:13px;line-height:1.8;color:var(--text-2);
}
.faq-side-note b{display:block;color:var(--text-1);font-size:14px;margin-bottom:6px}

.faq-group{margin-bottom:44px}
.faq-group:last-child{margin-bottom:0}
.faq-group h3{
  font-size:18px;font-weight:600;display:flex;align-items:center;gap:12px;margin-bottom:16px;
}
.faq-group h3::before{content:"";width:3px;height:18px;border-radius:3px;background:var(--brand);box-shadow:0 0 12px rgba(23,208,200,.85)}
.faq-item{
  border:1px solid var(--stroke);border-radius:var(--r-card);background:rgba(255,255,255,.03);
  margin-bottom:12px;overflow:hidden;transition:border-color .22s ease,background .22s ease;
}
.faq-item:hover{border-color:rgba(120,220,255,.28)}
.faq-item[open]{border-color:rgba(23,208,200,.42);background:rgba(23,208,200,.045)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;display:flex;align-items:center;gap:14px;
  padding:18px 20px;font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 12px rgba(23,208,200,.9);opacity:0;transition:opacity .22s ease;
}
.faq-item[open] summary::before{opacity:1}
.q-icon{
  margin-left:auto;flex:none;width:26px;height:26px;border-radius:9px;display:grid;place-items:center;
  border:1px solid var(--stroke);color:var(--text-2);transition:transform .25s ease,color .22s ease,border-color .22s ease;
}
.faq-item[open] .q-icon{transform:rotate(45deg);color:var(--brand);border-color:rgba(23,208,200,.5)}
.faq-a{padding:0 20px 20px 20px;font-size:15px;line-height:1.85;color:var(--text-2)}
.faq-a p + p{margin-top:10px}
.faq-a a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}

/* ---------- ask ---------- */
.ask-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:start}
.ask-media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--stroke);background:var(--bg-800)}
.ask-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.ask-media-cap{padding:14px 18px;font-size:13px;color:var(--text-3);border-top:1px solid var(--stroke)}
.ask-form{
  padding:28px;border-radius:var(--r-lg);background:rgba(255,255,255,.045);
  border:1px solid var(--stroke);box-shadow:var(--shadow-2);
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;color:var(--text-2);font-weight:500}
.field input,.field select,.field textarea{
  width:100%;background:rgba(6,10,18,.6);border:1px solid var(--stroke);border-radius:var(--r-btn);
  padding:12px 14px;font-size:15px;color:var(--text-1);outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{min-height:112px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(23,208,200,.6);box-shadow:0 0 0 3px rgba(23,208,200,.14)}
.form-foot{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:22px}
.privacy{font-size:12px;color:var(--text-3);line-height:1.7}

/* ---------- cta strip ---------- */
.cta-strip{
  border-top:1px solid var(--stroke);border-bottom:1px solid var(--stroke);
  background:linear-gradient(120deg,rgba(23,208,200,.10),rgba(6,10,18,.4) 55%,rgba(242,178,60,.07));
  padding:44px 0;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-title{font-size:clamp(20px,2.4vw,26px);font-weight:700}
.cta-sub{margin-top:8px;font-size:14px;color:var(--text-2);max-width:640px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:#04070D;border-top:1px solid var(--stroke);padding:64px 0 0;position:relative;z-index:1}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.foot-title{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:16px}
.foot-links{display:flex;flex-direction:column;gap:11px}
.foot-links a{font-size:14px;color:var(--text-2);transition:color .2s ease}
.foot-links a:hover{color:var(--brand)}
.foot-desc{font-size:13px;line-height:1.85;color:var(--text-3);margin-top:8px;max-width:340px}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:20px 0;border-top:1px solid var(--stroke);font-size:13px;color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .nav-links,.cmd-search,.nav-quick{display:none}
  .nav-toggle{display:block}
  .nav-inner{height:60px}
  .mobile-drawer{top:60px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .faq-layout{grid-template-columns:1fr;gap:30px}
  .faq-side{position:static}
  .faq-side-list{flex-direction:row;flex-wrap:wrap}
  .faq-side-list a{border-color:var(--stroke);background:rgba(255,255,255,.03)}
}
@media (max-width:900px){
  .quick-grid{grid-template-columns:1fr 1fr}
  .ask-grid{grid-template-columns:1fr;gap:28px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .section{padding:60px 0}
  .section.tight{padding:46px 0}
  .hero{padding:28px 0 52px}
  .hero-points{gap:14px}
  .quick-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .ask-form{padding:20px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .stat-strip{grid-template-columns:1fr;gap:16px;text-align:left}
  .stat-strip div{text-align:left}
}