/* roulang page: index */
:root{
    --bg-0:#05121B;
    --bg-1:#0A1E2A;
    --bg-2:#102B3A;
    --line:rgba(140,220,235,.14);
    --line-strong:rgba(140,220,235,.30);
    --ink:#EAF6F8;
    --ink-dim:#9FBAC6;
    --ink-mute:#6B8A97;
    --brand:#23D3C4;
    --brand-2:#7CE7FF;
    --accent:#FF6A2C;
    --r-card:18px;
    --r-frame:22px;
    --r-sm:12px;
    --shadow-1:0 12px 32px -18px rgba(0,0,0,.75);
    --shadow-2:0 18px 44px -16px rgba(35,211,196,.28);
    --w:1200px;
    --center:clamp(56px,10vw,72px);
    --section-y:clamp(64px,8vw,112px);
    --font-num:"Barlow Semi Condensed",system-ui,sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{background:var(--bg-0);scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:transparent;
    color:var(--ink);
    font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
    font-size:16px;
    line-height:1.85;
    text-align:left;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
  }
  body::before{
    content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
    background:
      radial-gradient(920px 620px at 88% -10%, rgba(35,211,196,.16), transparent 62%),
      radial-gradient(720px 520px at -8% 26%, rgba(255,106,44,.075), transparent 60%),
      repeating-linear-gradient(112deg, rgba(140,220,235,.05) 0 1px, transparent 1px 160px);
  }
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
  input{font:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding:0;list-style:none;}
  :focus-visible{outline:3px solid rgba(35,211,196,.55);outline-offset:3px;border-radius:6px;}
  .container{width:100%;max-width:var(--w);margin:0 auto;padding-left:20px;padding-right:20px;}
  @media(min-width:768px){.container{padding-left:24px;padding-right:24px;}}
  @media(min-width:1024px){.container{padding-left:32px;padding-right:32px;}}
  .section{padding-top:var(--section-y);padding-bottom:var(--section-y);}
  .num{font-family:var(--font-num);letter-spacing:.02em;}

  /* ============ 导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:transparent;
    border-bottom:1px solid transparent;
    transition:background .22s ease,border-color .22s ease,backdrop-filter .22s ease;
  }
  .site-header.scrolled{
    background:rgba(5,18,27,.84);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom-color:var(--line);
  }
  .header-inner{
    display:flex;align-items:center;gap:18px;
    height:64px;
  }
  @media(max-width:767px){.header-inner{height:56px;gap:12px;}}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{
    width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
    background:linear-gradient(150deg,rgba(35,211,196,.22),rgba(255,106,44,.16));
    border:1px solid var(--line-strong);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.18);
    flex-shrink:0;
  }
  .brand-mark svg{width:20px;height:20px;}
  .brand-text{
    font-weight:800;font-size:17px;letter-spacing:.01em;white-space:nowrap;
    background:linear-gradient(92deg,#EAF6F8 20%,#7CE7FF 78%);
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  @media(max-width:767px){.brand-text{font-size:15px;}}
  .main-nav{display:none;align-items:center;gap:6px;margin-left:14px;}
  @media(min-width:1024px){.main-nav{display:flex;}}
  .nav-link{
    position:relative;padding:8px 12px;border-radius:10px;
    font-size:14px;font-weight:600;color:var(--ink-dim);
    transition:color .18s ease,background .18s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
    width:0;height:2px;border-radius:2px;background:var(--brand);
    box-shadow:0 0 10px rgba(35,211,196,.8);
    transition:width .22s ease;
  }
  .nav-link:hover{color:var(--ink);}
  .nav-link:hover::after{width:60%;}
  .nav-link.active{color:var(--ink);}
  .nav-link.active::after{width:60%;}
  .header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
  .search-box{
    display:none;align-items:center;gap:8px;
    background:var(--bg-2);border:1px solid var(--line);
    border-radius:var(--r-sm);padding:7px 12px;width:206px;
    transition:border-color .18s ease,box-shadow .18s ease;
  }
  @media(min-width:1024px){.search-box{display:flex;}}
  .search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(35,211,196,.18);}
  .search-box svg{width:15px;height:15px;flex-shrink:0;color:var(--ink-mute);}
  .search-box input{
    border:0;background:transparent;color:var(--ink);width:100%;font-size:14px;outline:none;
  }
  .search-box input::placeholder{color:var(--ink-mute);}
  .ghost-link{
    display:none;font-size:14px;font-weight:600;color:var(--ink-dim);padding:8px 4px;
    transition:color .18s ease;
  }
  @media(min-width:768px){.ghost-link{display:inline-block;}}
  .ghost-link:hover{color:var(--brand);}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--r-sm);padding:12px 22px;
    font-size:15px;font-weight:700;line-height:1.2;white-space:nowrap;
    transition:transform .18s ease,box-shadow .22s ease,background .18s ease,border-color .18s ease,color .18s ease;
  }
  .btn:active{transform:translateY(1px);}
  .btn-sm{padding:9px 16px;font-size:14px;}
  .btn-accent{
    background:linear-gradient(135deg,#FF8A4C,#FF6A2C 62%);
    color:#1A0B04;
    box-shadow:0 0 0 1px rgba(255,106,44,.55),0 10px 30px -8px rgba(255,106,44,.55),0 0 48px -14px rgba(255,106,44,.7);
  }
  .btn-accent:hover{
    filter:brightness(1.08);transform:translateY(-1px);
    box-shadow:0 0 0 1px rgba(255,106,44,.65),0 14px 36px -8px rgba(255,106,44,.62),0 0 58px -12px rgba(255,106,44,.82);
  }
  .btn-glass{
    background:rgba(16,43,58,.62);
    border:1px solid var(--line-strong);
    color:var(--ink);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow-1);
  }
  .btn-glass:hover{border-color:var(--brand);color:var(--brand-2);transform:translateY(-1px);}
  .btn-brand{
    background:linear-gradient(135deg,#2FE0D0,#23D3C4 60%);
    color:#03211F;
    box-shadow:0 0 0 1px rgba(35,211,196,.5),0 10px 28px -10px rgba(35,211,196,.6);
  }
  .btn-brand:hover{filter:brightness(1.06);transform:translateY(-1px);}
  .menu-toggle{
    width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
    border:1px solid var(--line);background:rgba(16,43,58,.6);
  }
  @media(min-width:1024px){.menu-toggle{display:none;}}
  .menu-toggle span{
    display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;position:relative;
  }
  .menu-toggle span::before,.menu-toggle span::after{
    content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px;
  }
  .menu-toggle span::before{top:-5px;}
  .menu-toggle span::after{top:5px;}

  /* 抽屉 */
  .drawer{
    position:fixed;inset:0;z-index:80;
    background:rgba(5,18,27,.96);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    padding:24px 20px calc(24px + env(safe-area-inset-bottom));
    display:flex;flex-direction:column;gap:8px;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .24s ease,transform .24s ease;
  }
  .drawer.open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
  .drawer-close{width:40px;height:40px;border-radius:11px;border:1px solid var(--line);display:grid;place-items:center;font-size:20px;color:var(--ink-dim);}
  .drawer a.drawer-link{
    display:flex;align-items:center;gap:14px;
    font-size:18px;font-weight:700;padding:16px 4px;
    border-bottom:1px solid var(--line);color:var(--ink);
  }
  .drawer a.drawer-link i{
    font-style:normal;font-family:var(--font-num);font-size:13px;color:var(--brand);letter-spacing:.08em;
  }
  .drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px;padding-top:20px;}

  /* ============ Hero ============ */
  .hero{padding-top:clamp(36px,6vw,64px);padding-bottom:clamp(56px,8vw,96px);position:relative;}
  .hero-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center;}
  @media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:48px;}}
  .hero-copy{max-width:640px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 14px;border-radius:999px;
    border:1px solid var(--line-strong);
    background:rgba(16,43,58,.55);
    font-size:13px;letter-spacing:.06em;color:var(--ink-dim);
    font-family:var(--font-num);
  }
  .eyebrow .dot{
    width:8px;height:8px;border-radius:50%;background:var(--brand);
    box-shadow:0 0 0 4px rgba(35,211,196,.16);
  }
  .hero-h1{
    margin-top:22px;
    font-size:clamp(32px,5.4vw,64px);
    font-weight:900;line-height:1.1;letter-spacing:-.02em;
    word-break:break-word;
  }
  .hero-h1 .hl{
    background:linear-gradient(96deg,#7CE7FF,#23D3C4 72%);
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .hero-sub{
    margin-top:20px;max-width:520px;
    font-size:17px;line-height:1.85;color:var(--ink-dim);
  }
  .hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
  .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
  .hero-tags li{
    font-size:13px;color:var(--ink-mute);
    padding:5px 12px;border-radius:999px;border:1px solid var(--line);
  }
  .hero-visual{position:relative;}
  .hero-frame{
    position:relative;border-radius:var(--r-frame);overflow:hidden;
    border:1px solid var(--line-strong);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.16),var(--shadow-1);
    background:var(--bg-1);
  }
  .hero-frame img{
    width:100%;height:clamp(260px,42vw,420px);object-fit:cover;object-position:center;
    filter:saturate(.94) brightness(.86);
  }
  .hero-frame::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background:linear-gradient(180deg,rgba(5,18,27,.12) 0%,rgba(5,18,27,.62) 100%);
  }
  .hero-frame-bar{
    position:absolute;left:0;right:0;bottom:0;z-index:2;
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:14px 18px;background:rgba(5,18,27,.62);
    backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
    border-top:1px solid var(--line);
    font-size:13px;color:var(--ink-dim);
  }
  .hero-frame-bar strong{font-family:var(--font-num);font-size:18px;color:var(--accent);}
  .float-card{
    display:flex;align-items:center;gap:12px;
    background:rgba(16,43,58,.82);
    border:1px solid var(--line-strong);border-radius:var(--r-sm);
    padding:12px 16px;min-width:150px;
    box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow-1);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  }
  .float-card strong{font-family:var(--font-num);font-size:24px;color:var(--brand-2);line-height:1;}
  .float-card span{font-size:12px;color:var(--ink-mute);line-height:1.4;}
  .hero-visual .float-card{margin-top:16px;}
  @media(min-width:1024px){
    .hero-visual{display:grid;grid-template-columns:1fr auto auto;align-items:end;gap:0;}
    .hero-frame{grid-column:1 / -1;}
    .hero-visual .float-card{margin-top:0;position:relative;}
    .fc-1{transform:translate(-18px,-38px);justify-self:start;}
    .fc-2{transform:translate(18px,-24px);justify-self:end;}
  }

  /* ============ 通用板块头 ============ */
  .section-title{
    font-size:clamp(24px,3.4vw,40px);
    font-weight:800;line-height:1.18;letter-spacing:-.01em;
  }
  .section-lead{
    margin-top:14px;font-size:16px;line-height:1.85;color:var(--ink-dim);max-width:560px;
  }
  .section-head{margin-bottom:clamp(28px,4vw,44px);}
  .section-head.between{
    display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;
  }
  .more-link{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;font-weight:700;color:var(--brand);
    padding:6px 0;border-bottom:1px solid transparent;transition:border-color .2s ease,gap .2s ease;
  }
  .more-link:hover{border-bottom-color:var(--brand);gap:10px;}

  /* ============ 卖点 ============ */
  .features-grid{display:grid;grid-template-columns:1fr;gap:32px;}
  @media(min-width:1024px){.features-grid{grid-template-columns:4fr 8fr;gap:56px;}}
  .features-side{position:relative;}
  @media(min-width:1024px){.features-side{position:sticky;top:104px;align-self:start;}}
  .feature-list{display:grid;gap:12px;}
  .feature-item{
    position:relative;display:flex;gap:20px;
    padding:22px 24px;border-radius:var(--r-card);
    background:rgba(10,30,42,.66);
    border:1px solid var(--line);
    transition:background .2s ease,border-color .2s ease,transform .2s ease;
    overflow:hidden;
  }
  .feature-item::before{
    content:"";position:absolute;left:0;top:12%;bottom:12%;width:2px;border-radius:2px;
    background:var(--accent);opacity:0;transform:translateX(-4px);
    transition:opacity .22s ease,transform .22s ease;
  }
  .feature-item:hover{background:rgba(16,43,58,.85);border-color:var(--line-strong);}
  .feature-item:hover::before{opacity:1;transform:translateX(0);}
  .f-num{
    font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--ink-mute);
    line-height:1.1;flex-shrink:0;transition:color .2s ease;
  }
  .feature-item:hover .f-num{color:var(--brand);}
  .f-body h3{font-size:clamp(17px,1.5vw,20px);font-weight:700;line-height:1.4;}
  .f-body p{margin-top:8px;font-size:15px;line-height:1.8;color:var(--ink-dim);max-width:48ch;}
  .chip{
    display:inline-block;margin-top:14px;padding:4px 12px;border-radius:999px;
    font-size:12px;color:var(--brand-2);border:1px solid rgba(35,211,196,.38);
    background:rgba(35,211,196,.08);
  }

  /* ============ 演示 ============ */
  .demo-wrap{border-radius:var(--r-frame);border:1px solid var(--line-strong);background:rgba(10,30,42,.7);padding:14px;box-shadow:var(--shadow-1);transition:box-shadow .3s ease;}
  .demo-wrap:hover{box-shadow:0 18px 48px -18px rgba(35,211,196,.32),var(--shadow-1);}
  .seg-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}
  .seg{
    padding:7px 16px;border-radius:999px;font-size:13px;font-weight:600;
    color:var(--ink-dim);background:rgba(16,43,58,.7);border:1px solid var(--line);
    transition:all .18s ease;
  }
  .seg:hover{color:var(--ink);border-color:var(--line-strong);}
  .seg.active{background:var(--brand);color:#03211F;border-color:var(--brand);}
  .demo-canvas{
    position:relative;border-radius:var(--r-card);overflow:hidden;aspect-ratio:16/9;background:var(--bg-2);
  }
  .demo-canvas img{width:100%;height:100%;object-fit:cover;filter:saturate(.95) brightness(.82);}
  .demo-canvas::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(45deg,rgba(5,18,27,.82) 8%,rgba(5,18,27,.18) 62%,rgba(5,18,27,.55) 100%);
  }
  .demo-overlay{
    position:absolute;left:16px;right:16px;bottom:16px;z-index:2;
    display:flex;flex-wrap:wrap;align-items:center;gap:10px;justify-content:space-between;
  }
  .demo-overlay > span:first-child{
    font-size:13px;color:var(--ink-dim);
    background:rgba(5,18,27,.6);border:1px solid var(--line);
    padding:6px 12px;border-radius:999px;
    backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  }
  .pill-accent{
    font-size:12px;font-weight:700;color:#1A0B04;
    background:linear-gradient(135deg,#FFA06B,#FF6A2C);
    padding:5px 14px;border-radius:999px;
    box-shadow:0 6px 18px -8px rgba(255,106,44,.9);
  }
  .demo-note{margin-top:14px;font-size:13px;color:var(--ink-mute);}

  /* ============ 数据与引述 ============ */
  .stat-row{
    display:grid;grid-template-columns:repeat(2,1fr);gap:20px 12px;
    margin-bottom:clamp(32px,4vw,52px);
  }
  @media(min-width:768px){.stat-row{grid-template-columns:repeat(4,1fr);gap:24px;}}
  .stat .stat-num{
    font-family:var(--font-num);font-size:clamp(32px,4.2vw,52px);font-weight:800;
    color:var(--accent);line-height:1;letter-spacing:.01em;
  }
  .stat .stat-unit{font-size:14px;color:var(--ink-mute);margin-left:4px;}
  .stat p{margin-top:10px;font-size:14px;color:var(--ink-dim);line-height:1.6;}
  .quote-grid{display:grid;grid-template-columns:1fr;gap:18px;}
  @media(min-width:768px){.quote-grid{grid-template-columns:1fr 1fr;gap:24px;}}
  .quote-card{
    background:rgba(10,30,42,.66);border:1px solid var(--line);
    border-radius:var(--r-card);padding:24px 24px 22px 26px;
    position:relative;box-shadow:var(--shadow-1);
  }
  .quote-card::before{
    content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:0 3px 3px 0;
    background:linear-gradient(180deg,var(--brand-2),var(--brand));
  }
  .quote-card p{font-size:16px;line-height:1.85;color:var(--ink);}
  .quote-card cite{margin-top:14px;display:block;font-style:normal;font-size:13px;color:var(--ink-mute);}
  .partner-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:clamp(28px,4vw,40px);}
  .partner-row span{
    font-size:13px;color:var(--ink-dim);padding:6px 16px;border-radius:999px;
    border:1px solid var(--line);background:rgba(16,43,58,.4);
  }

  /* ============ 最新信息（CMS） ============ */
  .news-grid{display:grid;grid-template-columns:1fr;gap:20px;min-height:260px;}
  @media(min-width:1024px){.news-grid{grid-template-columns:5fr 7fr;gap:26px;}}
  .news-feature{
    display:flex;flex-direction:column;overflow:hidden;
    border-radius:var(--r-card);border:1px solid var(--line);
    background:rgba(10,30,42,.72);box-shadow:var(--shadow-1);
    transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
  }
  .news-feature:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--shadow-2);}
  .news-feature-thumb{height:180px;overflow:hidden;background:var(--bg-2);}
  .news-feature-thumb img{width:100%;height:100%;object-fit:cover;filter:brightness(.9);transition:transform .4s ease;}
  .news-feature:hover .news-feature-thumb img{transform:scale(1.04);}
  .news-feature-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
  .news-feature-body h3{
    font-size:20px;font-weight:700;line-height:1.45;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .news-feature-body p{
    margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-dim);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:auto;padding-top:16px;}
  .cat-pill{
    font-size:12px;color:var(--brand-2);padding:3px 11px;border-radius:999px;
    border:1px solid rgba(35,211,196,.38);background:rgba(35,211,196,.07);
  }
  .news-date{font-family:var(--font-num);font-size:13px;color:var(--ink-mute);letter-spacing:.03em;}
  .arrow{
    margin-left:auto;font-size:15px;color:var(--ink-mute);transition:transform .2s ease,color .2s ease;
  }
  .news-feature:hover .arrow,.news-row:hover .arrow{transform:translateX(4px);color:var(--brand);}
  .news-list{
    border-radius:var(--r-card);border:1px solid var(--line);
    background:rgba(10,30,42,.55);overflow:hidden;
  }
  .news-row{
    display:block;padding:16px 20px;border-bottom:1px solid var(--line);
    transition:background .2s ease;
  }
  .news-row:last-child{border-bottom:0;}
  .news-row:hover{background:var(--bg-2);}
  .news-row-top{display:flex;align-items:center;gap:12px;}
  .news-row-top h3{
    font-size:16px;font-weight:700;line-height:1.5;flex:1;min-width:0;
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  }
  .news-row-excerpt{
    margin-top:6px;font-size:13px;line-height:1.7;color:var(--ink-mute);
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  }
  .news-empty{
    grid-column:1 / -1;min-height:260px;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
    border:1px dashed var(--line-strong);border-radius:var(--r-card);
    background:rgba(16,43,58,.4);padding:36px 24px;text-align:center;
  }
  .news-empty svg{width:34px;height:34px;color:var(--ink-mute);}
  .news-empty p{font-size:14px;color:var(--ink-dim);}

  /* ============ 步骤 ============ */
  .step-grid{display:grid;grid-template-columns:1fr;gap:18px;counter-reset:step;}
  @media(min-width:768px){.step-grid{grid-template-columns:repeat(3,1fr);gap:22px;}}
  .step-card{
    position:relative;padding:26px 24px 24px;
    border-radius:var(--r-card);border:1px solid var(--line);
    background:rgba(10,30,42,.66);
    transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
  }
  .step-card:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:var(--shadow-1);}
  .step-card .step-no{
    display:inline-flex;align-items:center;justify-content:center;
    width:36px;height:36px;border-radius:11px;
    font-family:var(--font-num);font-size:16px;font-weight:700;color:var(--brand);
    background:rgba(35,211,196,.1);border:1px solid rgba(35,211,196,.32);
  }
  .step-card h3{margin-top:16px;font-size:18px;font-weight:700;}
  .step-card p{margin-top:10px;font-size:14px;line-height:1.85;color:var(--ink-dim);}
  .step-track{
    display:flex;align-items:center;gap:8px;margin-bottom:clamp(24px,4vw,36px);
  }
  .step-track i{
    height:4px;border-radius:4px;background:rgba(35,211,196,.22);flex:1;
  }
  .step-track i.on{background:linear-gradient(90deg,#7CE7FF,#23D3C4);box-shadow:0 0 14px rgba(35,211,196,.45);}

  /* ============ FAQ ============ */
  .faq-wrap{max-width:860px;margin:0 auto;display:grid;gap:12px;}
  .faq-item{
    border:1px solid var(--line);border-radius:14px;background:rgba(10,30,42,.6);
    overflow:hidden;transition:border-color .2s ease,background .2s ease;
  }
  .faq-item:hover{border-color:var(--line-strong);}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;
    padding:16px 20px;font-size:16px;font-weight:600;line-height:1.6;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary .q-no{
    font-family:var(--font-num);font-size:14px;color:var(--ink-mute);flex-shrink:0;
  }
  .faq-item summary .q-ico{
    margin-left:auto;width:24px;height:24px;flex-shrink:0;position:relative;
    border-radius:8px;border:1px solid var(--line-strong);
    transition:transform .26s ease,border-color .2s ease;
  }
  .faq-item summary .q-ico::before,.faq-item summary .q-ico::after{
    content:"";position:absolute;top:50%;left:50%;background:var(--ink-dim);border-radius:2px;
    transform:translate(-50%,-50%);
  }
  .faq-item summary .q-ico::before{width:10px;height:1.6px;}
  .faq-item summary .q-ico::after{width:1.6px;height:10px;transition:opacity .2s ease;}
  .faq-item[open] summary .q-ico{transform:rotate(45deg);border-color:var(--brand);}
  .faq-item[open] summary{color:var(--brand-2);}
  .faq-answer{
    padding:0 20px 20px 48px;font-size:15px;line-height:1.9;color:var(--ink-dim);max-width:62ch;
  }
  .faq-item[open]{border-color:rgba(35,211,196,.42);background:rgba(16,43,58,.8);}

  /* ============ CTA ============ */
  .cta-band{
    position:relative;overflow:hidden;
    border-radius:var(--r-frame);border:1px solid var(--line-strong);
    background:linear-gradient(120deg,rgba(35,211,196,.12),rgba(255,106,44,.08) 70%,rgba(16,43,58,.9));
    padding:clamp(36px,6vw,64px) clamp(24px,5vw,56px);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.16),var(--shadow-1);
    display:grid;gap:26px;grid-template-columns:1fr;
  }
  @media(min-width:1024px){.cta-band{grid-template-columns:1.4fr 1fr;align-items:center;}}
  .cta-band h2{font-size:clamp(24px,3.4vw,38px);font-weight:800;line-height:1.2;max-width:22ch;}
  .cta-band p{margin-top:14px;font-size:16px;color:var(--ink-dim);max-width:44ch;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
  @media(min-width:1024px){.cta-actions{justify-content:flex-end;}}

  /* ============ 页脚 ============ */
  .site-footer{
    margin-top:clamp(48px,7vw,88px);
    background:var(--bg-1);
    border-top:1px solid var(--line);
    padding-top:clamp(40px,6vw,64px);
  }
  .footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
  @media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;}}
  @media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
  .footer-brand .brand-text{font-size:16px;}
  .footer-desc{font-size:14px;line-height:1.85;color:var(--ink-dim);max-width:34ch;}
  .footer-social{display:flex;gap:10px;margin-top:18px;}
  .footer-social span{
    width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
    border:1px solid var(--line);color:var(--ink-mute);font-size:12px;
    font-family:var(--font-num);transition:all .2s ease;
  }
  .footer-social span:hover{border-color:var(--brand);color:var(--brand);}
  .footer-col h3{
    font-size:13px;letter-spacing:.1em;color:var(--ink-mute);font-weight:700;margin-bottom:16px;
    font-family:var(--font-num);text-transform:uppercase;
  }
  .footer-col ul{display:grid;gap:10px;}
  .footer-col a,.footer-col li{
    font-size:14px;color:var(--ink-dim);transition:color .18s ease,transform .18s ease;display:inline-block;
  }
  .footer-col a:hover{color:var(--brand);transform:translateX(2px);}
  .footer-bottom{
    margin-top:clamp(32px,5vw,52px);border-top:1px solid var(--line);
    padding:22px 0 calc(22px + env(safe-area-inset-bottom));
    display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
    font-size:13px;color:var(--ink-mute);
  }
  .footer-bottom .disclaim{font-size:12px;color:#54707C;max-width:70ch;line-height:1.7;}

  /* ============ 浮动 CTA ============ */
  .float-cta{
    position:fixed;z-index:70;
    right:24px;bottom:24px;
    display:inline-flex;align-items:center;gap:10px;
    padding:12px 20px;border-radius:999px;
    background:rgba(10,30,42,.9);
    border:1px solid rgba(255,106,44,.55);
    color:var(--ink);font-size:14px;font-weight:700;
    box-shadow:0 0 0 1px rgba(255,106,44,.25),0 14px 34px -12px rgba(255,106,44,.6);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    opacity:0;transform:translateY(14px);pointer-events:none;
    transition:opacity .3s ease,transform .3s ease;
  }
  .float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
  .float-cta .fd{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(255,106,44,.18);}
  .float-cta .fcx{
    margin-left:4px;width:20px;height:20px;border-radius:50%;
    display:grid;place-items:center;font-size:13px;color:var(--ink-mute);
    border:1px solid var(--line);line-height:1;
  }
  .float-cta .fcx:hover{color:var(--ink);border-color:var(--line-strong);}
  @media(max-width:767px){
    .float-cta{
      right:12px;left:12px;bottom:calc(12px + env(safe-area-inset-bottom));
      justify-content:center;padding:13px 16px;border-radius:14px;
    }
  }

  /* 锚点偏移 */
  section[id]{scroll-margin-top:88px;}

  @media (hover:none){
    .feature-item:hover,.step-card:hover,.news-feature:hover{transform:none;}
  }

/* roulang page: article */
:root{
    --bg-0:#05121B;
    --bg-1:#0A1E2A;
    --bg-2:#102B3A;
    --line:rgba(140,220,235,.14);
    --line-strong:rgba(140,220,235,.30);
    --ink:#EAF6F8;
    --ink-dim:#9FBAC6;
    --ink-mute:#6B8A97;
    --brand:#23D3C4;
    --brand-2:#7CE7FF;
    --accent:#FF6A2C;
    --radius-lg:22px;
    --radius:18px;
    --radius-sm:12px;
    --shadow-card:0 12px 32px -18px rgba(0,0,0,.75);
    --shadow-hover:0 18px 44px -16px rgba(35,211,196,.28);
    --gap-section:clamp(48px,7vw,88px);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
    background:var(--bg-0);
    color:var(--ink);
    line-height:1.85;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    background:
      radial-gradient(760px 520px at 88% -10%,rgba(35,211,196,.15),transparent 64%),
      radial-gradient(520px 380px at 4% 22%,rgba(255,106,44,.07),transparent 72%);
  }
  img{max-width:100%;display:block;border:0}
  a{color:inherit;text-decoration:none}
  button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
  input{font:inherit}
  ul,ol{margin:0;padding:0}
  :focus-visible{outline:3px solid rgba(35,211,196,.5);outline-offset:2px;border-radius:8px}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
  .mono{font-family:"Barlow Semi Condensed",system-ui,sans-serif;letter-spacing:.02em}

  /* ============ header ============ */
  .site-header{
    position:sticky;top:0;z-index:80;
    border-bottom:1px solid transparent;
    transition:background .22s ease,border-color .22s ease,backdrop-filter .22s ease;
  }
  .site-header.scrolled{
    background:rgba(5,18,27,.86);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom-color:var(--line);
  }
  .header-inner{display:flex;align-items:center;gap:24px;height:68px}
  .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(150deg,rgba(35,211,196,.22),rgba(255,106,44,.16));
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.18);
    flex-shrink:0;
  }
  .brand-mark svg{width:22px;height:22px}
  .brand-text{font-weight:800;font-size:17px;letter-spacing:.01em;white-space:nowrap}
  .main-nav{display:flex;align-items:center;gap:4px;margin-left:6px}
  .nav-link{
    position:relative;padding:9px 14px;border-radius:10px;
    font-size:14px;font-weight:600;color:var(--ink-dim);
    transition:color .18s ease,background .18s ease;white-space:nowrap;
  }
  .nav-link:hover{color:var(--ink);background:rgba(35,211,196,.08)}
  .nav-link.active{color:var(--ink)}
  .nav-link.active::after{
    content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
    width:60%;height:2px;border-radius:2px;background:var(--brand);
    box-shadow:0 0 12px rgba(35,211,196,.85);
  }
  .header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
  .search-box{
    display:flex;align-items:center;gap:8px;
    background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-sm);
    padding:8px 12px;width:212px;
    transition:border-color .18s ease,box-shadow .18s ease;
  }
  .search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(35,211,196,.18)}
  .search-box svg{width:16px;height:16px;flex-shrink:0;color:var(--ink-mute)}
  .search-box input{
    border:0;background:transparent;color:var(--ink);font-size:14px;
    outline:none;width:100%;min-width:0;
  }
  .search-box input::placeholder{color:var(--ink-mute)}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:11px 20px;border-radius:var(--radius-sm);
    font-size:14px;font-weight:700;border:1px solid transparent;
    transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease,filter .18s ease;
    white-space:nowrap;
  }
  .btn-primary{
    background:linear-gradient(135deg,#FF8A52,#FF5A18);
    color:#200D03;
    box-shadow:0 0 0 1px rgba(255,106,44,.55),0 10px 30px -8px rgba(255,106,44,.55),0 0 48px -14px rgba(255,106,44,.7);
  }
  .btn-primary:hover{transform:translateY(-1px);filter:brightness(1.07)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(255,106,44,.55),0 6px 18px -8px rgba(255,106,44,.5)}
  .btn-ghost{
    background:rgba(16,43,58,.55);border-color:var(--line);color:var(--ink);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
  }
  .btn-ghost:hover{border-color:rgba(35,211,196,.5);color:var(--brand-2);transform:translateY(-1px)}
  .btn-sm{padding:9px 16px;font-size:13px;border-radius:10px}
  .menu-toggle{
    display:none;align-items:center;justify-content:center;
    width:40px;height:40px;border-radius:11px;
    border:1px solid var(--line);background:rgba(16,43,58,.6);
  }
  .menu-toggle svg{width:20px;height:20px;color:var(--ink)}

  /* ============ article hero ============ */
  .article-hero{
    position:relative;z-index:1;
    padding:clamp(32px,5vw,56px) 0 clamp(28px,4vw,40px);
    border-bottom:1px solid var(--line);
  }
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--ink-mute);margin-bottom:20px;
  }
  .breadcrumb a{color:var(--ink-dim);transition:color .18s ease}
  .breadcrumb a:hover{color:var(--brand)}
  .breadcrumb .sep{color:rgba(107,138,151,.55)}
  .breadcrumb .current{color:var(--ink-dim);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .article-title{
    margin:0 0 22px;max-width:900px;
    font-size:clamp(28px,3.6vw,42px);line-height:1.3;font-weight:900;
    letter-spacing:-.01em;word-break:break-word;
  }
  .article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--ink-mute)}
  .article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(107,138,151,.6);flex-shrink:0}
  .pill{
    display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;
    font-size:12px;font-weight:600;letter-spacing:.02em;
    border:1px solid rgba(35,211,196,.42);color:var(--brand-2);
    background:rgba(35,211,196,.08);white-space:nowrap;
  }
  .pill-accent{border-color:rgba(255,106,44,.45);color:#FFB08A;background:rgba(255,106,44,.1)}

  /* ============ article body ============ */
  .article-wrap{position:relative;z-index:1;padding:var(--gap-section) 0 0}
  .article-col{max-width:820px;margin:0 auto}
  .article-body{font-size:17px;line-height:1.9;color:#D8E9EE}
  .article-body > *:first-child{margin-top:0}
  .article-body p{margin:0 0 1.15em;text-align:left;word-break:break-word}
  .article-body h2{
    position:relative;margin:2em 0 .7em;padding-left:16px;
    font-size:clamp(22px,2.4vw,28px);font-weight:800;line-height:1.35;color:var(--ink);
  }
  .article-body h2::before{
    content:"";position:absolute;left:0;top:.24em;bottom:.24em;width:3px;border-radius:3px;
    background:linear-gradient(180deg,var(--brand),rgba(35,211,196,.12));
  }
  .article-body h3{margin:1.7em 0 .6em;font-size:19px;font-weight:700;line-height:1.45;color:var(--ink)}
  .article-body h4{margin:1.4em 0 .5em;font-size:17px;font-weight:700;color:var(--ink)}
  .article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.35em}
  .article-body li{margin:.4em 0;word-break:break-word}
  .article-body li::marker{color:var(--brand)}
  .article-body blockquote{
    margin:1.5em 0;padding:18px 22px;
    background:rgba(16,43,58,.6);border-left:3px solid var(--brand);
    border-radius:0 14px 14px 0;color:var(--ink-dim);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.1);
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body img{
    width:100%;height:auto;border-radius:14px;
    border:1px solid var(--line);margin:1.5em 0;
  }
  .article-body figure{margin:1.5em 0}
  .article-body figcaption{font-size:13px;color:var(--ink-mute);margin-top:10px;text-align:center}
  .article-body a{color:var(--brand-2);border-bottom:1px solid rgba(124,231,255,.35);transition:color .18s,border-color .18s}
  .article-body a:hover{color:#fff;border-bottom-color:rgba(255,255,255,.6)}
  .article-body table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px;display:block;overflow-x:auto}
  .article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top}
  .article-body th{background:rgba(16,43,58,.72);color:var(--ink);font-weight:700;white-space:nowrap}
  .article-body td{color:var(--ink-dim)}
  .article-body strong{color:#fff;font-weight:700}
  .article-body code{
    font-family:"Barlow Semi Condensed",ui-monospace,monospace;
    background:rgba(35,211,196,.1);border:1px solid rgba(35,211,196,.22);
    color:var(--brand-2);padding:1px 6px;border-radius:6px;font-size:.92em;
  }
  .article-body hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}

  /* empty state */
  .empty-state{
    display:flex;flex-direction:column;align-items:center;gap:18px;
    padding:64px 28px;text-align:center;
    background:rgba(16,43,58,.5);border:1px solid var(--line);
    border-radius:var(--radius);box-shadow:var(--shadow-card);
  }
  .empty-icon{
    width:56px;height:56px;border-radius:16px;display:grid;place-items:center;
    border:1px solid var(--line);background:rgba(35,211,196,.1);color:var(--brand);
  }
  .empty-icon svg{width:26px;height:26px}
  .empty-state h2{margin:0;font-size:22px;font-weight:800;color:var(--ink)}
  .empty-state p{margin:0;font-size:14px;color:var(--ink-dim);max-width:420px}

  /* ============ article footer ============ */
  .article-foot{margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}
  .tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}
  .tag{
    display:inline-flex;align-items:center;gap:4px;
    padding:6px 14px;border-radius:999px;font-size:12.5px;font-weight:600;
    color:var(--ink-dim);border:1px solid var(--line);
    background:rgba(16,43,58,.5);
    transition:color .18s,border-color .18s,background .18s;
  }
  .tag:hover{color:var(--brand-2);border-color:rgba(35,211,196,.45);background:rgba(35,211,196,.08)}
  .author-bar{
    display:flex;align-items:center;gap:16px;flex-wrap:wrap;
    padding:20px 22px;border-radius:var(--radius);
    background:rgba(16,43,58,.55);border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.1);
  }
  .author-avatar{
    width:46px;height:46px;border-radius:14px;flex-shrink:0;
    display:grid;place-items:center;font-weight:800;font-size:17px;color:#04222A;
    background:linear-gradient(140deg,var(--brand-2),var(--brand));
  }
  .author-name{margin:0;font-size:15px;font-weight:700;color:var(--ink)}
  .author-note{margin:2px 0 0;font-size:13px;color:var(--ink-mute);line-height:1.7}
  .share-row{margin-left:auto;display:flex;gap:10px;flex-wrap:wrap}
  .share-btn{
    padding:8px 16px;border-radius:10px;font-size:13px;font-weight:600;
    border:1px solid var(--line);color:var(--ink-dim);background:rgba(10,30,42,.6);
    transition:color .18s,border-color .18s,transform .18s;
  }
  .share-btn:hover{color:var(--brand-2);border-color:rgba(35,211,196,.45);transform:translateY(-1px)}
  .back-row{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px}

  /* ============ related ============ */
  .related{position:relative;z-index:1;padding:var(--gap-section) 0 0}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap}
  .section-head h2{margin:0;font-size:clamp(22px,2.8vw,30px);font-weight:800;letter-spacing:-.01em}
  .section-head .sub{margin:8px 0 0;font-size:14px;color:var(--ink-dim);max-width:620px}
  .link-more{font-size:14px;font-weight:600;color:var(--brand-2);display:inline-flex;align-items:center;gap:6px;transition:gap .18s}
  .link-more:hover{gap:10px}
  .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
  .post-card{
    display:flex;flex-direction:column;overflow:hidden;
    background:rgba(16,43,58,.55);border:1px solid var(--line);
    border-radius:var(--radius);box-shadow:var(--shadow-card);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .post-card:hover{transform:translateY(-3px);border-color:rgba(35,211,196,.4);box-shadow:var(--shadow-hover)}
  .post-card .thumb{height:150px;overflow:hidden;background:var(--bg-2)}
  .post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
  .post-card:hover .thumb img{transform:scale(1.06)}
  .post-card .body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
  .post-card h3{margin:0;font-size:17px;font-weight:700;line-height:1.45;color:var(--ink);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .post-card .desc{
    margin:0;font-size:14px;color:var(--ink-dim);line-height:1.75;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-card .meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--ink-mute)}

  /* ============ CTA band ============ */
  .cta-band{position:relative;z-index:1;padding:var(--gap-section) 0 0}
  .cta-inner{
    position:relative;overflow:hidden;
    padding:clamp(32px,4.5vw,56px);
    border-radius:var(--radius-lg);
    border:1px solid var(--line);
    background:
      radial-gradient(520px 260px at 92% 8%,rgba(255,106,44,.16),transparent 66%),
      linear-gradient(140deg,rgba(16,43,58,.92),rgba(10,30,42,.92));
    box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow-card);
  }
  .cta-inner h2{margin:0 0 12px;font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.25}
  .cta-inner p{margin:0;font-size:15px;color:var(--ink-dim);max-width:620px;line-height:1.85}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

  /* ============ footer ============ */
  .site-footer{
    position:relative;z-index:1;
    margin-top:var(--gap-section);
    padding:clamp(44px,6vw,72px) 0 0;
    background:var(--bg-1);
    border-top:1px solid var(--line);
  }
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
  .footer-brand .brand-text{font-size:16px}
  .footer-desc{margin:0;font-size:14px;line-height:1.85;color:var(--ink-dim);max-width:330px}
  .footer-social{display:flex;gap:10px;margin-top:18px}
  .footer-social span{
    width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
    font-size:13px;font-weight:700;color:var(--ink-mute);
    border:1px solid var(--line);background:rgba(16,43,58,.5);
    font-family:"Barlow Semi Condensed",system-ui,sans-serif;
  }
  .footer-col h3{
    margin:0 0 16px;font-size:12.5px;font-weight:700;letter-spacing:.14em;
    color:var(--ink-mute);text-transform:uppercase;
  }
  .footer-col ul{list-style:none;display:grid;gap:10px}
  .footer-col li{font-size:14px;color:var(--ink-dim);line-height:1.75}
  .footer-col a{font-size:14px;color:var(--ink-dim);display:inline-block;transition:color .18s,transform .18s}
  .footer-col a:hover{color:var(--brand);transform:translateX(2px)}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
    border-top:1px solid var(--line);
    padding:20px 0 calc(28px + env(safe-area-inset-bottom));
    font-size:12.5px;color:var(--ink-mute);
  }
  .footer-bottom .disclaim{max-width:640px;line-height:1.7}

  /* ============ float cta ============ */
  .float-cta{
    position:fixed;right:24px;bottom:24px;z-index:90;
    display:inline-flex;align-items:center;gap:10px;
    padding:12px 18px;border-radius:999px;
    background:rgba(10,30,42,.92);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    border:1px solid rgba(255,106,44,.5);
    color:var(--ink);font-size:14px;font-weight:700;
    box-shadow:0 10px 30px -10px rgba(255,106,44,.6);
    opacity:0;transform:translateY(14px);pointer-events:none;
    transition:opacity .3s ease,transform .3s ease,box-shadow .2s ease;
  }
  .float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto}
  .float-cta:hover{box-shadow:0 14px 36px -10px rgba(255,106,44,.8)}
  .float-cta svg{width:16px;height:16px;color:var(--accent)}
  .float-close{
    width:22px;height:22px;border-radius:50%;display:grid;place-items:center;
    background:rgba(255,255,255,.08);color:var(--ink-mute);font-size:13px;line-height:1;
    transition:color .18s,background .18s;
  }
  .float-close:hover{color:var(--ink);background:rgba(255,255,255,.16)}

  /* ============ responsive ============ */
  @media (max-width:1024px){
    .container{padding:0 24px}
    .search-box{width:170px}
    .main-nav{margin-left:0}
  }
  @media (max-width:900px){
    .container{padding:0 24px}
    .header-inner{height:62px;gap:14px}
    .main-nav{
      position:absolute;top:62px;left:0;right:0;
      flex-direction:column;align-items:stretch;gap:4px;
      padding:14px 24px 22px;
      background:rgba(5,18,27,.97);
      backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
      border-bottom:1px solid var(--line);
      display:none;
    }
    .main-nav.open{display:flex}
    .nav-link{padding:14px 12px;font-size:16px;border-radius:10px}
    .nav-link.active::after{left:12px;transform:none;width:26px;bottom:8px}
    .search-box{display:none}
    .menu-toggle{display:inline-flex}
    .brand-text{font-size:16px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
    .related-grid{grid-template-columns:1fr 1fr}
    .article-col{max-width:100%}
    .author-bar .share-row{margin-left:0}
  }
  @media (max-width:640px){
    .container{padding:0 20px}
    .header-actions .btn{padding:9px 14px;font-size:13px}
    .article-body{font-size:16px;line-height:1.9}
    .breadcrumb .current{max-width:200px}
    .related-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr;gap:26px}
    .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
    .float-cta{
      left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));
      justify-content:center;border-radius:14px;padding:12px 14px;
    }
    .cta-inner{padding:26px 22px}
    .cta-actions .btn{width:100%}
    .author-bar{padding:18px}
  }
  @media (hover:none){
    .post-card:hover{transform:none}
    .btn:hover{transform:none}
  }

/* roulang page: category1 */
:root{
  --bg-0:#05121B;
  --bg-1:#0A1E2A;
  --bg-2:#102B3A;
  --line:rgba(140,220,235,.14);
  --line-strong:rgba(140,220,235,.30);
  --ink:#EAF6F8;
  --ink-dim:#9FBAC6;
  --ink-mute:#6B8A97;
  --brand:#23D3C4;
  --brand-2:#7CE7FF;
  --accent:#FF6A2C;
  --r-card:18px;
  --r-frame:22px;
  --r-sm:12px;
  --shadow-card:0 12px 32px -18px rgba(0,0,0,.75);
  --shadow-hover:0 18px 44px -16px rgba(35,211,196,.28);
  --font-cn:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Rajdhani","Barlow Semi Condensed",system-ui,sans-serif;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  background:var(--bg-0);
  color:var(--ink);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(680px 460px at 84% -10%, rgba(35,211,196,.18), transparent 70%),
    radial-gradient(560px 420px at 4% 16%, rgba(124,231,255,.10), transparent 72%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,p,ul,ol,figure{margin:0}
ul,ol{padding-left:0;list-style:none}
:focus-visible{outline:3px solid rgba(35,211,196,.5);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;position:relative;z-index:1}
section{scroll-margin-top:88px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  border-bottom:1px solid transparent;
  background:transparent;
  transition:background .22s ease,border-color .22s ease,backdrop-filter .22s ease;
}
.site-header.scrolled{
  background:rgba(5,18,27,.86);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;display:grid;place-items:center;
  border-radius:12px;border:1px solid var(--line);
  background:rgba(16,43,58,.75);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.18);
  flex-shrink:0;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{font-weight:800;font-size:15.5px;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px;flex:1;justify-content:center}
.nav-link{
  position:relative;padding:8px 14px;font-size:14px;font-weight:600;
  color:var(--ink-dim);border-radius:10px;transition:color .2s ease,background .2s ease;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);
  width:0;height:2px;border-radius:2px;background:var(--brand);
  box-shadow:0 0 10px rgba(35,211,196,.85);
  transition:width .22s ease;
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link.active::after{width:60%}
.nav-link.active{color:var(--ink)}
.header-tools{display:flex;align-items:center;gap:14px;flex-shrink:0}
.search-box{
  display:flex;align-items:center;gap:8px;width:200px;
  padding:8px 12px;border-radius:var(--r-sm);
  background:rgba(16,43,58,.7);border:1px solid var(--line);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(35,211,196,.18)}
.search-box svg{width:15px;height:15px;flex-shrink:0;stroke:var(--ink-mute)}
.search-box input{
  width:100%;border:0;background:transparent;color:var(--ink);
  font-size:13.5px;font-family:inherit;outline:none;
}
.search-box input::placeholder{color:var(--ink-mute)}
.link-login{font-size:14px;font-weight:600;color:var(--ink-dim);transition:color .2s ease}
.link-login:hover{color:var(--brand)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
}
.btn-accent{
  background:linear-gradient(180deg,#FF8A4C,#FF6A2C);color:#1A0A02;
  box-shadow:0 0 0 1px rgba(255,106,44,.55),0 10px 30px -8px rgba(255,106,44,.55),0 0 48px -14px rgba(255,106,44,.7);
}
.btn-accent:hover{
  transform:translateY(-1px);filter:brightness(1.08);
  box-shadow:0 0 0 1px rgba(255,106,44,.6),0 14px 38px -8px rgba(255,106,44,.62),0 0 60px -12px rgba(255,106,44,.78);
}
.btn-accent:active{
  transform:translateY(0);
  box-shadow:0 0 0 1px rgba(255,106,44,.5),0 6px 18px -8px rgba(255,106,44,.5);
}
.btn-glass{
  background:rgba(16,43,58,.6);color:var(--ink);border-color:var(--line);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.btn-glass:hover{border-color:var(--line-strong);background:rgba(16,43,58,.92);transform:translateY(-1px)}
.btn-sm{padding:9px 18px;font-size:14px}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);background:rgba(16,43,58,.7);
  padding:0;cursor:pointer;position:relative;
}
.nav-toggle span{
  position:absolute;left:11px;width:18px;height:2px;border-radius:2px;
  background:var(--ink);transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle span:nth-child(1){top:13px}
.nav-toggle span:nth-child(2){top:19px}
.nav-toggle span:nth-child(3){top:25px}
.mobile-panel{
  display:none;position:fixed;inset:64px 0 0 0;z-index:55;
  background:rgba(5,18,27,.97);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  padding:32px 24px 40px;
  flex-direction:column;gap:8px;
}
.mobile-panel.open{display:flex}
.m-link{
  display:flex;align-items:center;gap:14px;
  font-size:18px;font-weight:700;padding:16px 12px;border-radius:12px;
  border-bottom:1px solid var(--line);color:var(--ink-dim);
}
.m-link span{font-family:var(--font-num);font-size:14px;color:var(--ink-mute);letter-spacing:.06em}
.m-link.active{color:var(--brand)}
.m-link.active span{color:var(--brand)}
.mobile-panel .btn{margin-top:20px}

/* ---------- hero ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-mute);padding-top:26px;
}
.breadcrumb a{color:var(--ink-mute);transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{opacity:.5}
.page-hero{padding:26px 0 clamp(52px,7vw,92px)}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;margin-top:26px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 16px;border-radius:999px;font-size:13px;
  letter-spacing:.1em;color:var(--ink-dim);
  background:rgba(16,43,58,.72);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);
}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 12px var(--brand);flex-shrink:0}
.hero-grid h1{
  margin-top:22px;
  font-size:clamp(32px,4.4vw,56px);
  font-weight:900;line-height:1.12;letter-spacing:-.02em;
  word-break:break-word;
}
.hl{
  background:linear-gradient(100deg,var(--brand-2),var(--brand));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{
  margin-top:22px;max-width:560px;
  font-size:16.5px;line-height:1.9;color:var(--ink-dim);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.chip{
  padding:6px 15px;border-radius:999px;font-size:13px;
  color:var(--ink-dim);border:1px solid var(--line);
  background:rgba(16,43,58,.5);transition:all .2s ease;white-space:nowrap;
}
.chip:hover{border-color:var(--line-strong);color:var(--ink)}
.chip.is-on{background:var(--brand);border-color:var(--brand);color:#04161C;font-weight:700}
.hero-visual{position:relative}
.visual-frame{
  position:relative;border-radius:var(--r-frame);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-1);
  box-shadow:var(--shadow-card);
}
.visual-frame img{width:100%;height:400px;object-fit:cover}
.visual-frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(190deg,rgba(5,18,27,.15) 0%,rgba(5,18,27,.72) 100%);
  pointer-events:none;
}
.frame-bar{
  position:absolute;left:0;right:0;bottom:0;height:64px;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 20px;
  background:rgba(5,18,27,.68);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
}
.frame-bar .fb-label{font-size:13px;color:var(--ink-dim);letter-spacing:.06em}
.frame-bar .fb-num{font-family:var(--font-num);font-size:22px;font-weight:700;color:var(--accent)}
.float-card{
  position:absolute;z-index:3;padding:14px 18px;border-radius:var(--r-sm);
  background:rgba(10,30,42,.92);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
}
.float-card strong{display:block;font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--brand-2);line-height:1.1}
.float-card span{display:block;font-size:12.5px;color:var(--ink-mute);margin-top:2px}
.float-a{top:-24px;left:-28px}
.float-b{bottom:80px;right:-24px}
.float-b strong{color:var(--accent)}

/* ---------- sections ---------- */
.section{padding:clamp(56px,8vw,104px) 0}
.section-head{margin-bottom:40px;max-width:720px}
.section-head h2{
  font-size:clamp(26px,3.2vw,40px);font-weight:800;line-height:1.18;letter-spacing:-.01em;
}
.section-head p{margin-top:14px;font-size:15.5px;color:var(--ink-dim);max-width:620px}
.section-tag{
  display:inline-block;font-family:var(--font-num);font-size:12.5px;
  letter-spacing:.18em;color:var(--brand);margin-bottom:14px;
}

/* features */
.feature-list{display:flex;flex-direction:column;gap:12px}
.feature-row{
  position:relative;display:grid;grid-template-columns:72px 1fr;gap:20px;
  padding:22px 26px;border-radius:var(--r-card);
  border:1px solid var(--line);background:rgba(10,30,42,.62);
  overflow:hidden;transition:background .22s ease,border-color .22s ease,transform .22s ease;
}
.feature-row::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:2px;
  background:var(--accent);border-radius:2px;
  transform:scaleY(0);transform-origin:top;transition:transform .25s ease;
}
.feature-row:hover{background:var(--bg-2);border-color:var(--line-strong);transform:translateY(-1px)}
.feature-row:hover::before{transform:scaleY(1)}
.feature-num{
  font-family:var(--font-num);font-size:28px;font-weight:600;
  color:var(--ink-mute);line-height:1.2;transition:color .22s ease;
}
.feature-row:hover .feature-num{color:var(--brand)}
.feature-row h3{font-size:18px;font-weight:700;line-height:1.4}
.feature-row p{margin-top:8px;font-size:14.5px;color:var(--ink-dim);line-height:1.85}
.tag{
  display:inline-block;margin-top:12px;padding:3px 12px;border-radius:999px;
  font-size:12px;color:var(--brand);border:1px solid rgba(35,211,196,.35);
}

/* scenes */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{
  border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:rgba(10,30,42,.68);
  box-shadow:var(--shadow-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.scene-card img{width:100%;height:170px;object-fit:cover}
.scene-body{padding:22px 24px 26px}
.scene-body h3{font-size:17.5px;font-weight:700;line-height:1.45}
.scene-body p{margin-top:10px;font-size:14.5px;color:var(--ink-dim);line-height:1.85}
.scene-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:16px;
  font-size:13.5px;font-weight:700;color:var(--brand);transition:gap .2s ease;
}
.scene-link:hover{gap:10px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{
  position:relative;padding:26px 24px 28px;border-radius:var(--r-card);
  border:1px solid var(--line);background:rgba(10,30,42,.6);
  transition:border-color .22s ease,background .22s ease;
}
.step:hover{border-color:var(--line-strong);background:rgba(16,43,58,.7)}
.step-num{
  font-family:var(--font-num);font-size:32px;font-weight:700;
  color:var(--brand-2);line-height:1;
}
.step h3{margin-top:14px;font-size:16.5px;font-weight:700}
.step p{margin-top:8px;font-size:14px;color:var(--ink-dim);line-height:1.8}

/* stat strip */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:34px 36px;border-radius:var(--r-frame);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(35,211,196,.10),rgba(255,106,44,.07));
}
.stat-num{
  font-family:var(--font-num);font-size:clamp(30px,3.6vw,44px);
  font-weight:700;color:var(--accent);line-height:1.05;
}
.stat-num i{font-style:normal;font-size:14px;color:var(--ink-mute);margin-left:4px;font-family:var(--font-cn)}
.stat-desc{margin-top:6px;font-size:13.5px;color:var(--ink-dim)}

/* faq */
.faq-wrap{max-width:860px}
.faq-item{
  border:1px solid var(--line);border-radius:14px;
  background:rgba(10,30,42,.62);margin-bottom:12px;overflow:hidden;
  transition:border-color .22s ease,background .22s ease;
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;
  padding:18px 22px;font-size:16px;font-weight:700;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";margin-left:auto;font-family:var(--font-num);
  font-size:22px;line-height:1;color:var(--brand);
  transition:transform .25s ease;flex-shrink:0;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item[open]{background:rgba(16,43,58,.72);border-color:rgba(35,211,196,.3)}
.faq-answer{padding:0 22px 20px;font-size:15px;color:var(--ink-dim);line-height:1.9}

/* cta */
.cta-band{
  padding:clamp(36px,5vw,60px);border-radius:var(--r-frame);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(35,211,196,.13),rgba(255,106,44,.10));
  text-align:center;
  box-shadow:var(--shadow-card);
}
.cta-band h2{font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.25}
.cta-band p{margin:14px auto 0;max-width:560px;font-size:15.5px;color:var(--ink-dim)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:30px}

/* footer */
.site-footer{
  position:relative;z-index:1;margin-top:0;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:clamp(48px,6vw,72px) 0 28px;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:120px;
  background:linear-gradient(180deg,rgba(35,211,196,.06),transparent);
  pointer-events:none;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  position:relative;
}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-desc{margin-top:16px;font-size:14px;color:var(--ink-dim);line-height:1.85;max-width:320px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social span{
  width:34px;height:34px;display:grid;place-items:center;border-radius:10px;
  border:1px solid var(--line);background:rgba(16,43,58,.7);
  font-family:var(--font-num);font-size:13px;color:var(--ink-mute);
}
.footer-col h3{
  font-size:12.5px;letter-spacing:.14em;color:var(--ink-mute);
  font-weight:700;margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col li{
  font-size:14px;color:var(--ink-dim);line-height:1.7;
  transition:color .2s ease,transform .2s ease;display:inline-block;
}
.footer-col a:hover{color:var(--brand);transform:translateX(2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--ink-mute);
}
.disclaim{max-width:640px;line-height:1.7}

/* float cta */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:flex;align-items:center;gap:12px;
  padding:11px 16px 11px 20px;border-radius:999px;
  background:rgba(10,30,42,.92);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid rgba(255,106,44,.5);
  box-shadow:0 0 0 1px rgba(255,106,44,.35),0 14px 36px -12px rgba(255,106,44,.55);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta a{font-size:14px;font-weight:700;color:var(--ink)}
.float-cta a:hover{color:var(--accent)}
.float-close{
  width:22px;height:22px;border-radius:50%;border:1px solid var(--line);
  background:rgba(16,43,58,.9);color:var(--ink-mute);
  font-size:13px;line-height:1;cursor:pointer;padding:0;
  display:grid;place-items:center;transition:color .2s ease,border-color .2s ease;
}
.float-close:hover{color:var(--ink);border-color:var(--line-strong)}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .search-box{width:160px}
  .hero-grid{gap:40px}
  .float-a{left:-14px}
  .float-b{right:-12px}
}
@media (max-width:1024px){
  .container{padding:0 24px}
  .main-nav{display:none}
  .search-box,.link-login{display:none}
  .nav-toggle{display:block}
  .header-inner{justify-content:space-between}
  .header-tools{margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-lead{max-width:none}
  .visual-frame img{height:320px}
  .float-card{position:static;box-shadow:none;margin-top:14px}
  .float-a,.float-b{display:none}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .stat-strip{grid-template-columns:repeat(2,1fr);padding:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .container{padding:0 20px}
  .brand-text{font-size:14px}
  .hero-grid h1{font-size:clamp(28px,7.4vw,38px)}
  .hero-lead{font-size:15.5px}
  .hero-actions .btn{flex:1 1 160px}
  .scene-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr 1fr;gap:20px;padding:24px}
  .feature-row{grid-template-columns:52px 1fr;padding:20px;gap:14px}
  .feature-num{font-size:24px}
  .section-head{margin-bottom:28px}
  .cta-actions .btn{flex:1 1 100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .float-cta{
    left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));
    justify-content:center;border-radius:16px;
  }
}
@media (max-width:520px){
  .visual-frame img{height:240px}
  .frame-bar{height:56px;padding:0 14px}
  .frame-bar .fb-num{font-size:18px}
  .chip{font-size:12px;padding:5px 12px}
  .stat-strip{grid-template-columns:1fr}
  .btn{padding:11px 18px;font-size:14.5px}
  .faq-item summary{font-size:15px;padding:16px 18px}
}

/* roulang page: category2 */
:root{
  --bg-0:#05121B;
  --bg-1:#0A1E2A;
  --bg-2:#102B3A;
  --line:rgba(140,220,235,.14);
  --line-strong:rgba(140,220,235,.34);
  --ink:#EAF6F8;
  --ink-dim:#9FBAC6;
  --ink-mute:#6B8A97;
  --brand:#23D3C4;
  --brand-2:#7CE7FF;
  --accent:#FF6A2C;
  --r-sm:12px;
  --r-card:18px;
  --r-lg:22px;
  --shadow-card:0 12px 32px -18px rgba(0,0,0,.75);
  --shadow-hover:0 18px 44px -16px rgba(35,211,196,.28);
  --nav-h:64px;
  --sec-y:clamp(56px,9vw,112px);
  --font-cn:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Rajdhani","Barlow Semi Condensed",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(760px 460px at 86% -4%,rgba(35,211,196,.16),transparent 60%),
    radial-gradient(560px 420px at 2% 6%,rgba(124,231,255,.08),transparent 66%);
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:repeating-linear-gradient(115deg,rgba(140,220,235,.05) 0 1px,transparent 1px 168px);
  opacity:.65;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul{padding:0;list-style:none}
:focus-visible{outline:2px solid rgba(35,211,196,.9);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;position:relative;z-index:1}
@media (max-width:1024px){.container{padding:0 24px}}
@media (max-width:520px){.container{padding:0 20px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  height:var(--nav-h);
  display:flex;align-items:center;
  border-bottom:1px solid transparent;
  background:transparent;
  transition:background-color .22s ease,border-color .22s ease,backdrop-filter .22s ease;
}
.site-header.scrolled{
  background:rgba(5,18,27,.86);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:22px;width:100%}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--ink)}
.brand-mark{
  width:36px;height:36px;display:grid;place-items:center;flex:0 0 36px;
  border-radius:11px;background:rgba(16,43,58,.75);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.16);
}
.brand-mark svg{width:22px;height:22px;display:block}
.brand-text{white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:10px}
.nav-link{
  position:relative;padding:6px 0;font-size:14px;font-weight:600;color:var(--ink-dim);
  transition:color .2s ease;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-2px;width:0;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 12px var(--brand);
  transform:translateX(-50%);transition:width .22s ease;
}
.nav-link:hover,.nav-link:focus-visible{color:var(--ink)}
.nav-link:hover::after,.nav-link:focus-visible::after{width:60%}
.nav-link.active{color:var(--ink)}
.nav-link.active::after{width:60%}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:14px}
.search-box{
  display:flex;align-items:center;gap:8px;width:200px;padding:8px 12px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-sm);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box svg{width:15px;height:15px;flex:0 0 15px;color:var(--ink-mute)}
.search-box input{
  width:100%;border:0;background:none;outline:none;color:var(--ink);
  font-family:inherit;font-size:14px;
}
.search-box input::placeholder{color:var(--ink-mute)}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(35,211,196,.18)}
.login-link{font-size:14px;font-weight:600;color:var(--ink-dim);transition:color .2s ease;white-space:nowrap}
.login-link:hover{color:var(--brand-2)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:11px;border:1px solid var(--line);
  background:rgba(16,43,58,.7);align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;border-radius:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-5px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;white-space:nowrap;
  transition:transform .18s ease,box-shadow .22s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{
  background:linear-gradient(180deg,#FF7A40,#FF5A16);color:#1B0A02;
  box-shadow:0 0 0 1px rgba(255,106,44,.55),0 10px 30px -8px rgba(255,106,44,.55),0 0 48px -14px rgba(255,106,44,.7);
}
.btn-primary:hover{
  filter:brightness(1.08);transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(255,106,44,.62),0 14px 38px -8px rgba(255,106,44,.6),0 0 60px -12px rgba(255,106,44,.8);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(255,106,44,.5),0 8px 22px -10px rgba(255,106,44,.5)}
.btn-ghost{
  background:rgba(16,43,58,.6);border-color:var(--line-strong);color:var(--ink);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-2);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:9px 17px;font-size:14px;border-radius:10px}
.btn-row{display:flex;flex-wrap:wrap;gap:16px}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:clamp(46px,6.5vw,88px) 0 clamp(46px,6.5vw,84px);
  border-bottom:1px solid var(--line);
  margin-top:calc(var(--nav-h) * -1);
  padding-top:calc(var(--nav-h) + clamp(46px,6.5vw,86px));
}
.page-hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center 32%;
  opacity:.3;
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:0;
  background:linear-gradient(180deg,rgba(5,18,27,.6) 0%,rgba(5,18,27,.88) 58%,var(--bg-0) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:820px}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 15px;border-radius:999px;
  background:rgba(16,43,58,.72);border:1px solid var(--line);
  font-family:var(--font-num);font-size:12.5px;font-weight:600;letter-spacing:.12em;
  color:var(--brand-2);text-transform:uppercase;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand);flex:0 0 7px}
.page-title{
  margin-top:20px;
  font-size:clamp(30px,4.4vw,54px);
  font-weight:900;line-height:1.14;letter-spacing:-.02em;
  word-break:break-word;
}
.page-title .hl{
  background:linear-gradient(92deg,var(--brand-2),var(--brand));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{
  margin-top:20px;max-width:680px;
  font-size:16.5px;line-height:1.9;color:var(--ink-dim);
}
.hero-lead strong{color:var(--ink);font-weight:700}
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 15px;border-radius:999px;
  border:1px solid var(--line);background:rgba(16,43,58,.5);
  font-size:13px;color:var(--ink-dim);white-space:nowrap;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.chip:hover{border-color:var(--line-strong);color:var(--ink)}
.chip.is-active{
  background:rgba(35,211,196,.14);border-color:rgba(35,211,196,.6);color:var(--brand-2);font-weight:600;
}

/* ---------- section ---------- */
.section{padding:var(--sec-y) 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.section-title{
  font-size:clamp(25px,3.2vw,38px);
  font-weight:800;line-height:1.2;letter-spacing:-.01em;
}
.section-title .mark{color:var(--brand)}
.section-sub{margin-top:12px;font-size:15px;color:var(--ink-dim);max-width:620px;line-height:1.8}
.section-link{
  font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:7px;
  transition:gap .2s ease,color .2s ease;
}
.section-link:hover{gap:12px;color:var(--brand-2)}

/* ---------- flow (staggered waterfall) ---------- */
.flow-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:26px;padding-bottom:44px;
}
.flow-card{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  background:rgba(10,30,42,.74);border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.12);
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease,background-color .26s ease;
}
.flow-card:nth-child(even){transform:translateY(44px)}
.flow-card:hover{
  border-color:var(--line-strong);background:rgba(16,43,58,.84);
  box-shadow:var(--shadow-hover),inset 0 1px 0 rgba(255,255,255,.18);
}
.flow-card:hover{transform:translateY(-3px)}
.flow-card:nth-child(even):hover{transform:translateY(41px)}
.flow-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.flow-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.flow-card:hover .flow-media img{transform:scale(1.04)}
.flow-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,18,27,.15) 0%,rgba(5,18,27,.82) 100%);
}
.flow-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:12px;flex:1}
.flow-no{
  font-family:var(--font-num);font-size:30px;font-weight:700;line-height:1;
  color:var(--accent);letter-spacing:.02em;
}
.flow-card h3{font-size:19px;font-weight:700;line-height:1.4}
.flow-card p{font-size:15px;line-height:1.85;color:var(--ink-dim)}
.flow-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:auto;padding-top:6px}
.tag{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;
  border:1px solid rgba(35,211,196,.45);font-size:12px;color:var(--brand-2);
  background:rgba(35,211,196,.07);white-space:nowrap;
}
.meta-text{font-family:var(--font-num);font-size:13px;color:var(--ink-mute);letter-spacing:.04em}
.flow-card--plain{padding-top:6px}

/* ---------- stat band ---------- */
.stat-band{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;
  padding:clamp(26px,3.4vw,38px);
  background:linear-gradient(140deg,rgba(16,43,58,.92),rgba(10,30,42,.72));
  border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.14);
}
.stat-item{padding:4px 6px 4px 18px;border-left:2px solid rgba(255,106,44,.55)}
.stat-num{
  font-family:var(--font-num);font-size:clamp(30px,3.8vw,46px);font-weight:700;
  line-height:1.05;color:var(--accent);
}
.stat-num small{font-family:var(--font-cn);font-size:13px;font-weight:500;color:var(--ink-mute);margin-left:6px}
.stat-label{margin-top:8px;font-size:13.5px;color:var(--ink-dim);line-height:1.7}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;counter-reset:step}
.step{
  position:relative;padding:26px 24px 28px;
  background:rgba(10,30,42,.72);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.1);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.step:hover{border-color:rgba(35,211,196,.42);transform:translateY(-3px);box-shadow:var(--shadow-hover),inset 0 1px 0 rgba(255,255,255,.16)}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:11px;margin-bottom:16px;
  font-family:var(--font-num);font-size:16px;font-weight:700;
  background:rgba(35,211,196,.14);border:1px solid rgba(35,211,196,.45);color:var(--brand-2);
}
.step h3{font-size:17px;font-weight:700;line-height:1.4;margin-bottom:8px}
.step p{font-size:14.5px;line-height:1.85;color:var(--ink-dim)}
.step-bar{display:flex;gap:6px;margin-top:18px}
.step-bar i{display:block;height:3px;border-radius:2px;background:rgba(140,220,235,.2);flex:1}
.step-bar i.on{background:linear-gradient(90deg,var(--brand),var(--brand-2));box-shadow:0 0 10px rgba(35,211,196,.6)}

/* ---------- rule grid ---------- */
.rule-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;padding-bottom:40px}
.rule-card{
  padding:24px 26px 26px;
  background:rgba(10,30,42,.7);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.1);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease,background-color .24s ease;
}
.rule-card:nth-child(even){transform:translateY(38px)}
.rule-card:hover{
  border-color:rgba(255,106,44,.45);background:rgba(16,43,58,.82);
  box-shadow:0 18px 44px -20px rgba(255,106,44,.35),inset 0 1px 0 rgba(255,255,255,.16);
}
.rule-card:hover{transform:translateY(-3px)}
.rule-card:nth-child(even):hover{transform:translateY(35px)}
.rule-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.rule-ico{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;display:grid;place-items:center;
  background:rgba(35,211,196,.12);border:1px solid rgba(35,211,196,.34);color:var(--brand-2);
}
.rule-ico svg{width:19px;height:19px}
.rule-card h3{font-size:17.5px;font-weight:700;line-height:1.4}
.rule-card p{font-size:14.5px;line-height:1.9;color:var(--ink-dim)}
.rule-tag{margin-top:14px;display:inline-flex;padding:4px 12px;border-radius:999px;font-size:12px;
  border:1px solid var(--line-strong);color:var(--ink-mute)}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  background:rgba(10,30,42,.72);border:1px solid var(--line);border-radius:14px;
  overflow:hidden;transition:border-color .22s ease,background-color .22s ease;
}
.faq-item + .faq-item{margin-top:12px}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item[open]{border-color:rgba(35,211,196,.42);background:rgba(16,43,58,.8)}
.faq-item summary{
  list-style:none;display:flex;align-items:center;gap:14px;
  padding:18px 22px;cursor:pointer;font-size:16px;font-weight:700;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-no{font-family:var(--font-num);font-size:17px;color:var(--ink-mute);flex:0 0 auto}
.faq-q{flex:1;min-width:0}
.faq-ico{position:relative;width:18px;height:18px;flex:0 0 18px;margin-left:auto}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform .25s ease,opacity .25s ease;
}
.faq-ico::before{left:0;top:8px;width:18px;height:2px}
.faq-ico::after{left:8px;top:0;width:2px;height:18px}
.faq-item[open] .faq-ico::after{transform:rotate(90deg);opacity:0}
.faq-answer{padding:0 22px 22px 52px;font-size:15px;line-height:1.9;color:var(--ink-dim)}
.faq-item[open] summary{color:var(--brand-2)}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;
  margin-top:var(--sec-y);
  padding:clamp(32px,5vw,58px);
  border-radius:var(--r-lg);border:1px solid var(--line);
  background:linear-gradient(140deg,rgba(16,43,58,.94),rgba(10,30,42,.76));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14),0 24px 60px -34px rgba(35,211,196,.5);
}
.cta-band::before{
  content:"";position:absolute;right:-90px;top:-120px;width:320px;height:320px;
  background:radial-gradient(circle,rgba(255,106,44,.22),transparent 68%);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:1;max-width:640px}
.cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.25}
.cta-band p{margin-top:14px;font-size:15.5px;color:var(--ink-dim);line-height:1.9}
.cta-band .btn-row{margin-top:28px}

/* ---------- footer ---------- */
.site-footer{
  position:relative;z-index:1;margin-top:var(--sec-y);
  background:var(--bg-1);border-top:1px solid var(--line);
  padding:clamp(46px,6vw,72px) 0 26px;
}
.footer-grid{display:grid;grid-template-columns:1.55fr 1fr 1fr 1.25fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;color:var(--ink)}
.footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.9;color:var(--ink-dim);max-width:330px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social span{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(16,43,58,.6);
  font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--ink-mute);
}
.footer-col h3{
  font-size:12.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-mute);margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px;font-size:14px;color:var(--ink-dim);line-height:1.75}
.footer-col ul li a{transition:color .2s ease,padding-left .2s ease}
.footer-col ul li a:hover{color:var(--brand);padding-left:2px}
.footer-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:var(--ink-mute);
}
.disclaim{max-width:620px;line-height:1.8}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:120;
  display:flex;align-items:center;gap:10px;
  padding:11px 14px 11px 18px;border-radius:999px;
  background:rgba(10,30,42,.92);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid rgba(255,106,44,.5);
  box-shadow:0 10px 30px -8px rgba(255,106,44,.42);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta a{font-size:14px;font-weight:700;color:var(--ink);white-space:nowrap}
.float-cta .float-ico{
  width:26px;height:26px;border-radius:50%;display:grid;place-items:center;flex:0 0 26px;
  background:linear-gradient(180deg,#FF7A40,#FF5A16);color:#1B0A02;
}
.float-close{
  width:22px;height:22px;border-radius:50%;border:1px solid var(--line);
  background:rgba(16,43,58,.8);color:var(--ink-mute);cursor:pointer;
  display:grid;place-items:center;font-size:13px;line-height:1;padding:0;
  transition:color .2s ease,border-color .2s ease;
}
.float-close:hover{color:var(--ink);border-color:var(--line-strong)}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;left:0;right:0;top:var(--nav-h);bottom:0;z-index:99;
  padding:26px 24px 40px;
  background:rgba(5,18,27,.97);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:4px;
  opacity:0;transform:translateY(-10px);pointer-events:none;
  transition:opacity .24s ease,transform .24s ease;
  overflow-y:auto;
}
.mobile-drawer.open{opacity:1;transform:translateY(0);pointer-events:auto}
.mobile-drawer a.m-link{
  display:flex;align-items:center;gap:14px;padding:14px 4px;font-size:17px;font-weight:700;
  color:var(--ink);border-bottom:1px solid rgba(140,220,235,.09);
}
.mobile-drawer a.m-link .m-no{font-family:var(--font-num);font-size:13px;color:var(--ink-mute);font-weight:600}
.mobile-drawer .m-search{margin-top:20px;width:100%}
.mobile-drawer .btn{margin-top:14px;width:100%}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .main-nav{gap:20px}
  .search-box{width:168px}
}
@media (max-width:1023px){
  .main-nav{display:none}
  .search-box{display:none}
  .nav-toggle{display:flex}
  .login-link{display:none}
  .header-inner{gap:14px}
  .flow-grid{gap:20px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:30px}
}
@media (max-width:768px){
  :root{--nav-h:56px}
  .brand{font-size:15.5px}
  .brand-mark{width:32px;height:32px;flex:0 0 32px}
  .page-hero{padding-top:calc(var(--nav-h) + 38px);padding-bottom:44px}
  .page-title{font-size:clamp(26px,7.4vw,36px)}
  .hero-lead{font-size:15.5px}
  .flow-grid{grid-template-columns:1fr;padding-bottom:0;gap:18px}
  .flow-card:nth-child(even),
  .flow-card:nth-child(even):hover{transform:none}
  .rule-grid{grid-template-columns:1fr;padding-bottom:0;gap:18px}
  .rule-card:nth-child(even),
  .rule-card:nth-child(even):hover{transform:none}
  .stat-band{grid-template-columns:1fr;gap:18px}
  .steps{grid-template-columns:1fr}
  .section-head{margin-bottom:26px}
  .faq-answer{padding-left:22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand-col{grid-column:1 / -1}
  .footer-bottom{flex-direction:column;gap:10px}
  .float-cta{
    left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom,0px));
    justify-content:center;border-radius:14px;padding:10px 14px;
  }
  .float-cta a{flex:1;text-align:center}
}
@media (max-width:520px){
  .btn{width:100%}
  .btn-sm{width:auto}
  .cta-band .btn-row .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .rule-card{padding:20px}
  .flow-body{padding:18px 18px 22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
}