/* roulang page: index */
:root{
      --bg:#050816;
      --bg-2:#070b1e;
      --panel:#0d1430;
      --panel-2:#101936;
      --glass:rgba(255,255,255,.075);
      --glass-strong:rgba(255,255,255,.11);
      --text:#eaf0ff;
      --muted:#a9b4d0;
      --weak:#6f7a99;
      --primary:#4f8cff;
      --primary-2:#3b82f6;
      --purple:#8b5cf6;
      --purple-2:#a855f7;
      --cyan:#22d3ee;
      --warn:#f59e0b;
      --border:rgba(151,171,255,.18);
      --border-strong:rgba(151,171,255,.32);
      --line:rgba(255,255,255,.08);
      --shadow:0 22px 70px rgba(0,0,0,.38);
      --shadow-soft:0 14px 38px rgba(0,0,0,.28);
      --glow:0 0 28px rgba(79,140,255,.42);
      --glow-purple:0 0 36px rgba(139,92,246,.34);
      --radius-xl:30px;
      --radius-lg:24px;
      --radius-md:18px;
      --radius-sm:14px;
      --container:1200px;
      --nav-height:132px;
      --font:PingFang SC,Microsoft YaHei,Noto Sans SC,Helvetica Neue,Arial,sans-serif;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      font-family:var(--font);
      line-height:1.75;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(59,130,246,.28), transparent 34%),
        radial-gradient(circle at 84% 16%, rgba(168,85,247,.24), transparent 32%),
        radial-gradient(circle at 56% 92%, rgba(34,211,238,.14), transparent 36%),
        linear-gradient(180deg,#050816 0%,#070b1e 46%,#050816 100%);
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
      background-size:58px 58px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.8), transparent 78%);
      z-index:-2;
    }
    body:after{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background:radial-gradient(circle at 50% 0%, transparent 0, rgba(5,8,22,.18) 45%, rgba(5,8,22,.78) 100%);
      z-index:-1;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    ::selection{background:rgba(79,140,255,.35);color:#fff}
    .container{width:min(var(--container), calc(100% - 40px));margin:0 auto}
    .skip-link{
      position:absolute;left:16px;top:-80px;z-index:999;
      padding:10px 14px;border-radius:999px;background:#fff;color:#081026;font-weight:700;
      transition:top .2s ease;
    }
    .skip-link:focus{top:14px}
    .site-header{
      position:sticky;
      top:0;
      z-index:100;
      border-bottom:1px solid var(--border);
      background:rgba(5,8,22,.74);
      backdrop-filter:blur(22px);
      box-shadow:0 12px 45px rgba(0,0,0,.24);
    }
    .nav-top{
      display:grid;
      grid-template-columns:minmax(250px,1fr) minmax(300px,460px) auto;
      align-items:center;
      gap:18px;
      padding:17px 0 14px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:0;
    }
    .brand-mark{
      width:42px;height:42px;border-radius:15px;
      background:
        radial-gradient(circle at 30% 25%, rgba(34,211,238,.95), transparent 28%),
        linear-gradient(135deg, rgba(79,140,255,.95), rgba(139,92,246,.9));
      box-shadow:0 0 26px rgba(79,140,255,.42), inset 0 0 18px rgba(255,255,255,.22);
      position:relative;
      flex:0 0 auto;
    }
    .brand-mark:after{
      content:"18+";
      position:absolute;
      inset:auto -6px -7px auto;
      font-size:10px;
      line-height:1;
      font-weight:800;
      color:#111827;
      background:var(--warn);
      border-radius:999px;
      padding:4px 6px;
      box-shadow:0 0 16px rgba(245,158,11,.35);
    }
    .brand-text{min-width:0}
    .brand-name{
      display:block;
      font-weight:800;
      letter-spacing:.2px;
      color:#f7fbff;
      line-height:1.2;
      text-shadow:0 0 20px rgba(79,140,255,.36);
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .brand-sub{
      display:block;
      margin-top:3px;
      color:var(--muted);
      font-size:12px;
      line-height:1.2;
    }
    .search-wrap{
      display:flex;
      align-items:center;
      gap:9px;
      padding:7px 9px 7px 14px;
      min-height:46px;
      border:1px solid var(--border);
      border-radius:999px;
      background:rgba(255,255,255,.055);
      transition:border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .search-wrap:focus-within{
      border-color:rgba(34,211,238,.65);
      box-shadow:0 0 0 4px rgba(34,211,238,.08), 0 0 24px rgba(79,140,255,.22);
      background:rgba(255,255,255,.085);
    }
    .search-icon{color:var(--cyan);font-size:15px}
    .search-wrap input{
      width:100%;
      border:0;
      outline:0;
      background:transparent;
      color:var(--text);
      font-size:14px;
    }
    .search-wrap input::placeholder{color:var(--weak)}
    .search-btn{
      flex:0 0 auto;
      padding:7px 13px;
      border-radius:999px;
      color:#dff7ff;
      background:rgba(79,140,255,.16);
      border:1px solid rgba(79,140,255,.28);
      font-weight:700;
      font-size:13px;
      transition:transform .2s ease, background .2s ease, border-color .2s ease;
    }
    .search-btn:hover{transform:translateY(-1px);background:rgba(79,140,255,.25);border-color:rgba(34,211,238,.45)}
    .search-btn:active{transform:scale(.98)}
    .nav-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:44px;
      padding:12px 19px;
      border-radius:999px;
      font-weight:750;
      line-height:1.2;
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease, background .22s ease, filter .22s ease;
      user-select:none;
      white-space:nowrap;
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--primary-2),var(--purple));
      box-shadow:var(--glow);
      border:1px solid rgba(255,255,255,.14);
    }
    .btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 34px rgba(139,92,246,.5)}
    .btn-primary:active,.btn-secondary:active,.btn-ghost:active{transform:scale(.98)}
    .btn-secondary{
      color:#edf6ff;
      background:rgba(255,255,255,.07);
      border:1px solid rgba(79,140,255,.36);
      box-shadow:0 12px 30px rgba(0,0,0,.18);
    }
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(34,211,238,.58);background:rgba(79,140,255,.13);box-shadow:0 0 24px rgba(34,211,238,.16)}
    .btn-ghost{
      color:#dbe8ff;
      background:rgba(255,255,255,.045);
      border:1px solid var(--border);
    }
    .btn-ghost:hover{transform:translateY(-2px);border-color:rgba(168,85,247,.42);background:rgba(168,85,247,.12)}
    .btn:focus-visible,.search-btn:focus-visible,.tab-link:focus-visible,.faq-question:focus-visible,.text-link:focus-visible,input:focus-visible{
      outline:3px solid rgba(34,211,238,.42);
      outline-offset:3px;
    }
    .nav-tabs-row{
      border-top:1px solid rgba(255,255,255,.07);
    }
    .tabs-scroller{
      display:flex;
      gap:10px;
      overflow-x:auto;
      padding:11px 0 13px;
      scrollbar-width:thin;
      scrollbar-color:rgba(79,140,255,.38) transparent;
    }
    .tabs-scroller::-webkit-scrollbar{height:4px}
    .tabs-scroller::-webkit-scrollbar-thumb{background:rgba(79,140,255,.35);border-radius:999px}
    .tab-link{
      flex:0 0 auto;
      display:inline-flex;
      align-items:center;
      gap:7px;
      min-height:38px;
      padding:8px 15px;
      border:1px solid rgba(151,171,255,.16);
      border-radius:999px;
      color:var(--muted);
      background:rgba(255,255,255,.04);
      font-weight:650;
      font-size:14px;
      transition:color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
    }
    .tab-link:hover{
      color:#fff;
      transform:translateY(-1px);
      border-color:rgba(79,140,255,.38);
      background:rgba(79,140,255,.12);
    }
    .tab-link.active{
      color:#fff;
      border-color:rgba(34,211,238,.48);
      background:linear-gradient(135deg,rgba(79,140,255,.22),rgba(139,92,246,.17));
      box-shadow:0 0 20px rgba(79,140,255,.18);
    }
    main{position:relative}
    section{scroll-margin-top:150px}
    .hero{
      padding:94px 0 72px;
      position:relative;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:1.02fr .98fr;
      gap:44px;
      align-items:center;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:9px;
      padding:8px 13px;
      border:1px solid rgba(245,158,11,.38);
      border-radius:999px;
      background:rgba(245,158,11,.08);
      color:#ffe2a8;
      font-size:13px;
      font-weight:750;
      margin-bottom:20px;
    }
    .pulse-dot{
      width:8px;height:8px;border-radius:50%;
      background:var(--cyan);
      box-shadow:0 0 16px rgba(34,211,238,.75);
    }
    h1,h2,h3,p{margin-top:0}
    h1{
      margin-bottom:22px;
      font-size:clamp(34px,5vw,56px);
      line-height:1.14;
      letter-spacing:-1px;
      font-weight:850;
    }
    .gradient-text{
      background:linear-gradient(90deg,#f8fbff 0%,#a9d8ff 42%,#d7b7ff 100%);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .hero-lead{
      max-width:650px;
      color:var(--muted);
      font-size:17px;
      line-height:1.85;
      margin-bottom:28px;
    }
    .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:22px}
    .trust-line{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin:0;
      padding:0;
      list-style:none;
      color:#cbd7ef;
      font-size:14px;
    }
    .trust-line li{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:7px 11px;
      border-radius:999px;
      border:1px solid rgba(151,171,255,.14);
      background:rgba(255,255,255,.045);
    }
    .trust-line li:before{content:"✓";color:var(--cyan);font-weight:900}
    .hero-visual{position:relative;min-height:540px}
    .portal-orbit{
      position:absolute;
      inset:18px 0 auto 22px;
      height:420px;
      border-radius:34px;
      background:
        radial-gradient(circle at 70% 20%,rgba(168,85,247,.22),transparent 34%),
        radial-gradient(circle at 20% 82%,rgba(34,211,238,.18),transparent 30%),
        rgba(255,255,255,.045);
      border:1px solid var(--border);
      box-shadow:var(--shadow), inset 0 1px 0 rgba(255,255,255,.08);
      backdrop-filter:blur(16px);
      overflow:hidden;
    }
    .portal-orbit:before{
      content:"";
      position:absolute;
      inset:28px;
      border-radius:28px;
      border:1px dashed rgba(34,211,238,.2);
      background:linear-gradient(135deg,transparent,rgba(79,140,255,.06));
    }
    .portal-orbit:after{
      content:"";
      position:absolute;
      width:220px;height:220px;
      right:-70px;top:-70px;
      border-radius:50%;
      background:radial-gradient(circle,rgba(139,92,246,.42),transparent 68%);
      filter:blur(6px);
    }
    .dashboard-card{
      position:absolute;
      border:1px solid rgba(255,255,255,.13);
      background:rgba(13,20,48,.68);
      backdrop-filter:blur(18px);
      box-shadow:var(--shadow-soft);
      border-radius:24px;
      padding:20px;
      overflow:hidden;
    }
    .dashboard-card:before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(135deg,rgba(255,255,255,.09),transparent 45%);
      pointer-events:none;
    }
    .dash-main{left:0;right:38px;top:62px;min-height:250px}
    .dash-side{right:0;bottom:26px;width:270px}
    .dash-mini{left:44px;bottom:0;width:255px}
    .card-top{
      display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px;position:relative;
    }
    .card-title{font-weight:800;font-size:18px}
    .status-badge,.badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:6px 10px;
      border-radius:999px;
      border:1px solid rgba(34,211,238,.3);
      background:rgba(34,211,238,.09);
      color:#b7f6ff;
      font-size:12px;
      font-weight:750;
      white-space:nowrap;
    }
    .status-badge.warn{border-color:rgba(245,158,11,.36);background:rgba(245,158,11,.1);color:#ffdfa4}
    .heat-list{display:grid;gap:13px;position:relative}
    .heat-item{
      display:grid;
      grid-template-columns:90px 1fr 44px;
      align-items:center;
      gap:12px;
      color:#dce8ff;
      font-size:14px;
    }
    .bar{
      height:8px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;
    }
    .bar span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--primary),var(--purple),var(--cyan));box-shadow:0 0 16px rgba(79,140,255,.42)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:9px;position:relative}
    .tag{
      display:inline-flex;
      align-items:center;
      padding:6px 10px;
      border-radius:999px;
      background:rgba(255,255,255,.065);
      border:1px solid rgba(255,255,255,.11);
      color:#cfdaf4;
      font-size:12px;
      font-weight:650;
    }
    .mini-number{
      font-size:34px;
      line-height:1;
      font-weight:850;
      color:#f6fbff;
      text-shadow:0 0 20px rgba(34,211,238,.25);
      margin-bottom:8px;
    }
    .mini-note{color:var(--muted);font-size:14px;margin:0}
    .section{padding:78px 0}
    .section-head{
      max-width:780px;
      margin-bottom:34px;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-bottom:10px;
      color:#9fefff;
      font-size:13px;
      font-weight:800;
      letter-spacing:.05em;
    }
    .section-kicker:before{
      content:"";
      width:24px;height:2px;
      background:linear-gradient(90deg,var(--cyan),transparent);
      border-radius:999px;
    }
    h2{
      margin-bottom:13px;
      font-size:clamp(26px,3.4vw,38px);
      line-height:1.22;
      font-weight:850;
      letter-spacing:-.5px;
    }
    .section-desc{
      color:var(--muted);
      font-size:16px;
      max-width:720px;
      margin-bottom:0;
    }
    .pain-layout{
      display:grid;
      grid-template-columns:330px 1fr;
      gap:26px;
      align-items:stretch;
    }
    .timeline-panel,.glass-card{
      border:1px solid var(--border);
      background:linear-gradient(145deg,rgba(255,255,255,.08),rgba(255,255,255,.045));
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-soft);
      backdrop-filter:blur(18px);
    }
    .timeline-panel{padding:26px;position:relative;overflow:hidden}
    .timeline-panel:after{
      content:"";
      position:absolute;
      inset:auto -60px -80px auto;
      width:210px;height:210px;border-radius:50%;
      background:radial-gradient(circle,rgba(79,140,255,.22),transparent 66%);
    }
    .timeline-list{list-style:none;margin:0;padding:0;display:grid;gap:22px;position:relative}
    .timeline-list:before{
      content:"";
      position:absolute;left:12px;top:8px;bottom:8px;width:1px;background:linear-gradient(var(--cyan),rgba(139,92,246,.25),transparent);
    }
    .timeline-list li{display:grid;grid-template-columns:26px 1fr;gap:13px;color:var(--muted);font-size:14px}
    .node{
      width:26px;height:26px;border-radius:50%;
      background:rgba(34,211,238,.1);
      border:1px solid rgba(34,211,238,.4);
      box-shadow:0 0 18px rgba(34,211,238,.18);
      position:relative;
      z-index:1;
    }
    .timeline-list strong{display:block;color:var(--text);font-size:16px;margin-bottom:2px}
    .pain-cards{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:18px;
    }
    .pain-card,.feature-point,.metric-card,.content-card,.feedback-card,.faq-item{
      border:1px solid var(--border);
      background:rgba(255,255,255,.06);
      border-radius:var(--radius-md);
      box-shadow:0 12px 36px rgba(0,0,0,.22);
      transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease,background .24s ease;
    }
    .pain-card{padding:24px}
    .pain-card:hover,.feature-point:hover,.metric-card:hover,.content-card:hover,.feedback-card:hover{
      transform:translateY(-4px);
      border-color:rgba(34,211,238,.38);
      box-shadow:0 20px 54px rgba(0,0,0,.32),0 0 28px rgba(79,140,255,.14);
      background:rgba(255,255,255,.08);
    }
    .icon-box{
      width:46px;height:46px;border-radius:16px;
      display:grid;place-items:center;
      color:#dffcff;
      background:linear-gradient(135deg,rgba(79,140,255,.18),rgba(139,92,246,.16));
      border:1px solid rgba(34,211,238,.22);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
      margin-bottom:16px;
      font-size:22px;
    }
    .pain-card h3,.feature-point h3,.content-card h3,.feedback-card h3{margin-bottom:8px;font-size:20px;line-height:1.35}
    .pain-card p,.feature-point p,.content-card p,.feedback-card p{margin:0;color:var(--muted);font-size:15px}
    .solution-wrap{
      position:relative;
      display:grid;
      grid-template-columns:1fr 1.15fr 1fr;
      gap:20px;
      align-items:center;
    }
    .feature-stack{display:grid;gap:18px}
    .feature-point{padding:22px}
    .center-panel{
      min-height:430px;
      padding:30px;
      border-radius:var(--radius-xl);
      border:1px solid rgba(151,171,255,.24);
      background:
        radial-gradient(circle at 25% 20%,rgba(34,211,238,.16),transparent 30%),
        radial-gradient(circle at 78% 76%,rgba(168,85,247,.18),transparent 32%),
        rgba(255,255,255,.07);
      box-shadow:var(--shadow), inset 0 1px 0 rgba(255,255,255,.1);
      position:relative;
      overflow:hidden;
    }
    .center-panel:before{
      content:"";
      position:absolute;
      inset:38px;
      border-radius:28px;
      border:1px solid rgba(255,255,255,.1);
      background:linear-gradient(180deg,rgba(255,255,255,.035),transparent);
    }
    .channel-screen{position:relative;z-index:1;display:grid;gap:14px}
    .screen-head{
      display:flex;justify-content:space-between;align-items:center;
      padding:14px 16px;
      border-radius:18px;
      background:rgba(5,8,22,.42);
      border:1px solid rgba(255,255,255,.1);
    }
    .screen-tabs{display:flex;gap:8px;flex-wrap:wrap}
    .screen-tab{
      padding:7px 10px;border-radius:999px;font-size:12px;font-weight:750;color:#dce9ff;
      background:rgba(79,140,255,.13);border:1px solid rgba(79,140,255,.23);
    }
    .screen-list{display:grid;gap:11px}
    .screen-row{
      display:grid;grid-template-columns:54px 1fr auto;gap:13px;align-items:center;
      padding:13px;
      border-radius:18px;
      background:rgba(255,255,255,.055);
      border:1px solid rgba(255,255,255,.09);
    }
    .thumb{
      height:48px;border-radius:14px;
      background:linear-gradient(135deg,rgba(79,140,255,.5),rgba(139,92,246,.36),rgba(34,211,238,.2));
      position:relative;
      overflow:hidden;
    }
    .thumb:after{
      content:"";
      position:absolute;inset:0;
      background:radial-gradient(circle at 35% 25%,rgba(255,255,255,.28),transparent 25%);
    }
    .row-title{font-weight:750;line-height:1.35}
    .row-meta{color:var(--weak);font-size:12px;margin-top:2px}
    .metric-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:18px;
    }
    .metric-card{padding:24px;min-height:160px}
    .metric-value{
      display:block;
      margin-bottom:12px;
      font-size:34px;
      font-weight:900;
      line-height:1;
      background:linear-gradient(90deg,#fff,var(--cyan));
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .metric-card h3{font-size:18px;margin-bottom:7px}
    .metric-card p{margin:0;color:var(--muted);font-size:14px}
    .channel-section{overflow:hidden}
    .channel-track{
      display:grid;
      grid-template-columns:1.25fr .8fr 1fr;
      grid-auto-rows:minmax(180px,auto);
      gap:18px;
    }
    .channel-card{
      position:relative;
      overflow:hidden;
      min-height:220px;
      padding:24px;
      border-radius:var(--radius-lg);
      border:1px solid var(--border);
      background:rgba(255,255,255,.06);
      box-shadow:var(--shadow-soft);
      transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
    }
    .channel-card:hover{transform:translateY(-5px);border-color:rgba(139,92,246,.42);box-shadow:0 24px 62px rgba(0,0,0,.34),var(--glow-purple)}
    .channel-card:before{
      content:"";
      position:absolute;
      inset:0;
      background:radial-gradient(circle at 75% 18%,rgba(79,140,255,.26),transparent 32%),
                 radial-gradient(circle at 18% 88%,rgba(168,85,247,.19),transparent 28%);
      pointer-events:none;
    }
    .channel-card.large{grid-row:span 2;min-height:420px}
    .channel-card.wide{grid-column:span 2}
    .channel-inner{position:relative;z-index:1;height:100%;display:flex;flex-direction:column;justify-content:space-between;gap:28px}
    .channel-number{font-size:13px;color:var(--cyan);font-weight:900;letter-spacing:.08em}
    .channel-card h3{font-size:24px;margin:12px 0 10px;line-height:1.25}
    .channel-card p{color:var(--muted);margin:0}
    .text-link{
      display:inline-flex;align-items:center;gap:7px;
      color:#bdefff;font-weight:800;margin-top:18px;
      transition:gap .2s ease,color .2s ease;
    }
    .text-link:hover{gap:12px;color:#fff}
    .content-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:18px;
    }
    .content-card{overflow:hidden}
    .cover{
      height:158px;
      border-radius:var(--radius-md) var(--radius-md) 0 0;
      background:
        linear-gradient(135deg,rgba(79,140,255,.4),rgba(139,92,246,.24)),
        repeating-linear-gradient(45deg,rgba(255,255,255,.08) 0 1px,transparent 1px 12px);
      position:relative;
      overflow:hidden;
    }
    .cover:before{
      content:"精选";
      position:absolute;
      top:14px;left:14px;
      padding:6px 10px;border-radius:999px;
      background:rgba(5,8,22,.56);
      border:1px solid rgba(255,255,255,.14);
      color:#eaf7ff;font-size:12px;font-weight:800;
    }
    .cover:after{
      content:"";
      position:absolute;
      width:190px;height:190px;right:-54px;bottom:-80px;border-radius:50%;
      background:radial-gradient(circle,rgba(34,211,238,.38),transparent 66%);
    }
    .content-body{padding:20px}
    .content-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
    .content-card h3{font-size:19px;line-height:1.38}
    .content-card p{min-height:52px}
    .card-foot{
      display:flex;align-items:center;justify-content:space-between;gap:10px;
      margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
      color:var(--weak);font-size:13px;
    }
    .small-btn{
      display:inline-flex;align-items:center;justify-content:center;
      min-height:36px;padding:8px 12px;border-radius:999px;
      color:#dff7ff;background:rgba(79,140,255,.12);border:1px solid rgba(79,140,255,.26);
      font-weight:800;
      transition:transform .2s ease,background .2s ease,border-color .2s ease;
    }
    .small-btn:hover{transform:translateY(-1px);background:rgba(79,140,255,.2);border-color:rgba(34,211,238,.42)}
    .feedback-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr .9fr;
      gap:18px;
    }
    .feedback-card{padding:24px}
    .quote-mark{
      width:42px;height:42px;border-radius:50%;
      display:grid;place-items:center;
      margin-bottom:15px;
      background:rgba(139,92,246,.15);
      border:1px solid rgba(139,92,246,.25);
      color:#d8c3ff;font-weight:900;font-size:22px;
    }
    .feedback-user{
      display:flex;align-items:center;gap:10px;margin-top:18px;color:#d6e2f8;font-weight:800;
    }
    .avatar{
      width:34px;height:34px;border-radius:50%;
      background:linear-gradient(135deg,var(--primary),var(--purple));
      box-shadow:0 0 16px rgba(79,140,255,.26);
    }
    .faq-grid{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:26px;
      align-items:start;
    }
    .faq-aside{
      padding:28px;
      border-radius:var(--radius-lg);
      background:linear-gradient(145deg,rgba(79,140,255,.11),rgba(139,92,246,.08));
      border:1px solid var(--border);
      box-shadow:var(--shadow-soft);
    }
    .faq-aside p{color:var(--muted);margin-bottom:20px}
    .faq-list{display:grid;gap:13px}
    .faq-item{overflow:hidden;background:rgba(255,255,255,.055)}
    .faq-question{
      width:100%;
      min-height:62px;
      padding:18px 20px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      color:var(--text);
      background:transparent;
      text-align:left;
      font-weight:800;
      font-size:16px;
    }
    .faq-question span:last-child{
      width:26px;height:26px;border-radius:50%;
      display:grid;place-items:center;
      flex:0 0 auto;
      color:#c9f7ff;
      background:rgba(34,211,238,.1);
      border:1px solid rgba(34,211,238,.22);
      transition:transform .2s ease;
    }
    .faq-answer{
      padding:0 20px 18px;
      color:var(--muted);
      display:none;
      font-size:15px;
    }
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
    .cta-panel{
      position:relative;
      overflow:hidden;
      padding:42px;
      border-radius:var(--radius-xl);
      border:1px solid rgba(151,171,255,.24);
      background:
        radial-gradient(circle at 18% 20%,rgba(34,211,238,.18),transparent 32%),
        radial-gradient(circle at 82% 34%,rgba(168,85,247,.2),transparent 34%),
        rgba(255,255,255,.07);
      box-shadow:var(--shadow);
    }
    .cta-panel:before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(90deg,rgba(255,255,255,.07),transparent 45%);
      pointer-events:none;
    }
    .cta-content{
      position:relative;
      display:grid;
      grid-template-columns:1fr auto;
      gap:28px;
      align-items:center;
    }
    .cta-content h2{margin-bottom:10px}
    .cta-content p{color:var(--muted);margin:0;max-width:760px}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .site-footer{
      margin-top:54px;
      border-top:1px solid var(--border);
      background:rgba(3,6,18,.72);
      position:relative;
    }
    .site-footer:before{
      content:"";
      position:absolute;left:0;right:0;top:0;height:1px;
      background:linear-gradient(90deg,transparent,var(--cyan),var(--purple),transparent);
      opacity:.42;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.3fr .7fr .9fr;
      gap:28px;
      padding:44px 0 30px;
    }
    .footer-brand{font-weight:850;font-size:18px;margin-bottom:10px;text-shadow:0 0 18px rgba(79,140,255,.28)}
    .footer-text{color:var(--muted);margin:0;max-width:520px;font-size:14px}
    .footer-col h3{font-size:15px;margin:0 0 12px;color:#f3f7ff}
    .footer-links{list-style:none;margin:0;padding:0;display:grid;gap:9px}
    .footer-links a,.footer-links span{color:var(--muted);font-size:14px;transition:color .2s ease}
    .footer-links a:hover{color:#fff}
    .footer-bottom{
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      padding:18px 0 28px;
      border-top:1px solid var(--line);
      color:var(--weak);
      font-size:13px;
    }
    @media (max-width:1080px){
      .nav-top{grid-template-columns:1fr auto}
      .search-wrap{grid-column:1 / -1;order:3}
      .hero-grid{grid-template-columns:1fr;gap:26px}
      .hero-visual{min-height:500px}
      .solution-wrap{grid-template-columns:1fr}
      .feature-stack{grid-template-columns:repeat(2,1fr)}
      .metric-grid{grid-template-columns:repeat(2,1fr)}
      .channel-track{grid-template-columns:1fr 1fr}
      .channel-card.large{grid-row:span 1;min-height:260px}
      .channel-card.wide{grid-column:span 1}
      .content-grid{grid-template-columns:repeat(2,1fr)}
      .feedback-grid{grid-template-columns:1fr 1fr}
      .feedback-card:first-child{grid-column:1 / -1}
      .faq-grid{grid-template-columns:1fr}
      .cta-content{grid-template-columns:1fr}
      .cta-actions{justify-content:flex-start}
    }
    @media (max-width:820px){
      .container{width:min(100% - 28px,var(--container))}
      .site-header{position:relative}
      section{scroll-margin-top:20px}
      .nav-top{grid-template-columns:1fr;padding-top:14px}
      .brand-name{font-size:15px;white-space:normal}
      .nav-actions{justify-content:flex-start}
      .tabs-scroller{padding-bottom:12px}
      .hero{padding:58px 0 46px}
      .hero-actions .btn{width:100%}
      .hero-visual{min-height:auto}
      .portal-orbit,.dashboard-card{position:relative;inset:auto;right:auto;left:auto;top:auto;bottom:auto;width:auto}
      .portal-orbit{height:220px;margin-bottom:-90px}
      .dash-main{margin-top:0;min-height:auto}
      .dash-side,.dash-mini{margin-top:14px}
      .heat-item{grid-template-columns:76px 1fr 38px}
      .section{padding:54px 0}
      .pain-layout{grid-template-columns:1fr}
      .pain-cards{grid-template-columns:1fr}
      .feature-stack{grid-template-columns:1fr}
      .center-panel{min-height:auto;padding:22px}
      .screen-row{grid-template-columns:48px 1fr}
      .screen-row .badge{grid-column:2}
      .channel-track{display:flex;overflow-x:auto;padding-bottom:8px;scroll-snap-type:x mandatory}
      .channel-card{min-width:82%;scroll-snap-align:start}
      .content-grid{grid-template-columns:1fr}
      .feedback-grid{grid-template-columns:1fr}
      .feedback-card:first-child{grid-column:auto}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width:520px){
      .container{width:min(100% - 22px,var(--container))}
      h1{letter-spacing:-.6px}
      .brand-mark{width:38px;height:38px;border-radius:13px}
      .search-wrap{border-radius:18px;align-items:stretch}
      .search-btn{padding:7px 10px}
      .nav-actions .btn{width:100%}
      .tab-link{font-size:13px;padding:8px 12px}
      .hero{padding-top:42px}
      .trust-line li{width:100%}
      .section-head{margin-bottom:24px}
      .metric-grid{grid-template-columns:1fr}
      .cta-panel{padding:26px 20px;border-radius:24px}
      .cta-actions .btn{width:100%}
      .footer-bottom{display:grid}
    }

/* roulang page: category1 */
:root{
      --bg: #050816;
      --bg-2: #0a1024;
      --bg-3: #101936;
      --panel: rgba(255,255,255,.07);
      --panel-strong: rgba(255,255,255,.1);
      --panel-deep: rgba(10,16,36,.8);
      --line: rgba(151,171,255,.18);
      --line-soft: rgba(255,255,255,.08);
      --text: #eaf0ff;
      --muted: #a9b4d0;
      --subtle: #6f7a99;
      --primary: #4f8cff;
      --primary-2: #8b5cf6;
      --accent: #22d3ee;
      --warning: #f59e0b;
      --success: #34d399;
      --shadow: 0 20px 60px rgba(0,0,0,.35);
      --shadow-glow: 0 0 24px rgba(79,140,255,.42);
      --radius-xl: 30px;
      --radius-lg: 22px;
      --radius-md: 18px;
      --radius-sm: 14px;
      --container: 1220px;
      --gap: 24px;
      --gap-lg: 32px;
      --gap-xl: 44px;
      --header-h: 0px;
    }

    *, *::before, *::after{ box-sizing:border-box; }
    html{ scroll-behavior:smooth; }
    body{
      margin:0;
      font-family: PingFang SC, Microsoft YaHei, Noto Sans SC, Helvetica Neue, Arial, sans-serif;
      color:var(--text);
      background:
        radial-gradient(1200px 700px at 12% 10%, rgba(79,140,255,.18), transparent 55%),
        radial-gradient(900px 600px at 88% 14%, rgba(139,92,246,.16), transparent 45%),
        radial-gradient(800px 540px at 50% 100%, rgba(34,211,238,.12), transparent 45%),
        linear-gradient(180deg, #050816 0%, #070b1e 38%, #050816 100%);
      min-height:100vh;
      line-height:1.75;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
      overflow-x:hidden;
    }

    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
      background-size: 64px 64px;
      mask-image: linear-gradient(180deg, rgba(0,0,0,.35), rgba(0,0,0,.1) 70%, rgba(0,0,0,0));
      opacity:.22;
      z-index:-2;
    }

    body::after{
      content:"";
      position:fixed;
      inset:-20%;
      pointer-events:none;
      background: radial-gradient(circle at center, transparent 56%, rgba(5,8,22,.18) 100%);
      z-index:-3;
    }

    a{
      color:inherit;
      text-decoration:none;
      transition: color .25s ease, opacity .25s ease, transform .25s ease, background .25s ease, border-color .25s ease, box-shadow .25s ease;
    }
    img{ max-width:100%; display:block; }
    button, input{
      font:inherit;
    }
    button{
      border:0;
      background:none;
      color:inherit;
      cursor:pointer;
    }
    input{
      color:var(--text);
      outline:none;
    }
    ::selection{
      background: rgba(79,140,255,.32);
      color: #fff;
    }

    .container{
      width:min(var(--container), calc(100% - 40px));
      margin-inline:auto;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:40;
      backdrop-filter: blur(18px);
      background: linear-gradient(180deg, rgba(5,8,22,.82), rgba(5,8,22,.58));
      border-bottom:1px solid rgba(151,171,255,.14);
      box-shadow: 0 12px 40px rgba(0,0,0,.2);
    }

    .site-header .container{
      padding:16px 0 14px;
    }

    .nav-top{
      display:flex;
      align-items:center;
      gap:18px;
    }

    .brand{
      display:flex;
      align-items:center;
      gap:14px;
      min-width:0;
      flex:0 0 auto;
    }

    .brand-mark{
      width:42px;
      height:42px;
      border-radius:14px;
      background:
        radial-gradient(circle at 30% 30%, rgba(255,255,255,.95), rgba(255,255,255,0) 34%),
        linear-gradient(135deg, rgba(79,140,255,1), rgba(139,92,246,1));
      box-shadow: 0 0 0 1px rgba(255,255,255,.12) inset, 0 12px 28px rgba(79,140,255,.25), 0 0 30px rgba(139,92,246,.18);
      position:relative;
    }

    .brand-mark::after{
      content:"";
      position:absolute;
      inset:8px;
      border-radius:10px;
      border:1px solid rgba(255,255,255,.24);
      opacity:.9;
    }

    .brand-text{
      display:flex;
      flex-direction:column;
      gap:2px;
      line-height:1.2;
      min-width:0;
    }

    .brand-name{
      font-size:16px;
      font-weight:800;
      letter-spacing:.2px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
      text-shadow: 0 0 20px rgba(79,140,255,.18);
    }

    .brand-sub{
      font-size:12px;
      color:var(--muted);
      letter-spacing:.3px;
    }

    .search-wrap{
      flex:1 1 auto;
      min-width:0;
      display:flex;
      align-items:center;
      gap:10px;
      padding:11px 14px;
      border-radius:999px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.16);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
    }

    .search-wrap:focus-within{
      border-color: rgba(79,140,255,.58);
      box-shadow: 0 0 0 4px rgba(79,140,255,.12), 0 0 28px rgba(79,140,255,.18);
    }

    .search-icon{
      color:#a9b4d0;
      font-size:16px;
      line-height:1;
      flex:0 0 auto;
    }

    .search-wrap input{
      flex:1 1 auto;
      min-width:0;
      background:transparent;
      border:0;
      font-size:14px;
      color:var(--text);
    }

    .search-wrap input::placeholder{
      color:#8c97b7;
    }

    .search-btn,
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:44px;
      padding:0 18px;
      border-radius:999px;
      font-weight:700;
      letter-spacing:.2px;
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background .22s ease, color .22s ease, opacity .22s ease;
      white-space:nowrap;
    }

    .search-btn{
      background: rgba(79,140,255,.12);
      color: var(--text);
      border:1px solid rgba(79,140,255,.24);
    }

    .btn-primary{
      background: linear-gradient(135deg, rgba(79,140,255,1), rgba(139,92,246,1));
      box-shadow: var(--shadow-glow), 0 14px 34px rgba(79,140,255,.2);
      color:#fff;
    }

    .btn-secondary{
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.22);
      color:var(--text);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
    }

    .btn-text{
      color:#dbe5ff;
      background:transparent;
      padding-inline:2px;
    }

    .btn .arrow{
      display:inline-block;
      transition: transform .22s ease;
    }

    .nav-actions{
      display:flex;
      align-items:center;
      gap:12px;
      flex:0 0 auto;
    }

    .search-btn:hover,
    .btn:hover,
    .tab-link:hover,
    .pill:hover{
      transform: translateY(-1px);
    }

    .search-btn:hover{
      border-color: rgba(79,140,255,.48);
      box-shadow: 0 0 0 4px rgba(79,140,255,.09);
    }

    .btn-primary:hover{
      box-shadow: 0 0 30px rgba(79,140,255,.48), 0 16px 38px rgba(79,140,255,.2);
    }

    .btn-secondary:hover{
      background: rgba(255,255,255,.08);
      border-color: rgba(151,171,255,.35);
    }

    .btn-text:hover .arrow{
      transform: translateX(4px);
    }

    .btn:active,
    .tab-link:active,
    .pill:active{
      transform: translateY(0) scale(.98);
    }

    .btn:focus-visible,
    .search-btn:focus-visible,
    .tab-link:focus-visible,
    .pill:focus-visible,
    .faq-toggle:focus-visible,
    input:focus-visible{
      outline:none;
      box-shadow: 0 0 0 3px rgba(34,211,238,.18), 0 0 0 6px rgba(79,140,255,.14);
    }

    .nav-tabs-row{
      margin-top:14px;
    }

    .tabs-scroller{
      display:flex;
      gap:10px;
      overflow-x:auto;
      padding-bottom:2px;
      scrollbar-width:none;
    }

    .tabs-scroller::-webkit-scrollbar{
      display:none;
    }

    .tab-link{
      flex:0 0 auto;
      min-height:40px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:0 16px;
      border-radius:999px;
      border:1px solid rgba(151,171,255,.14);
      background: rgba(255,255,255,.04);
      color:#d8e4ff;
      font-size:14px;
      font-weight:600;
      letter-spacing:.15px;
    }

    .tab-link.active{
      background: linear-gradient(135deg, rgba(79,140,255,.24), rgba(139,92,246,.24));
      border-color: rgba(79,140,255,.5);
      box-shadow: 0 0 0 1px rgba(255,255,255,.03) inset, 0 10px 24px rgba(79,140,255,.12);
      color:#fff;
    }

    .page{
      position:relative;
      padding: 28px 0 90px;
    }

    .section{
      padding: 72px 0;
      position:relative;
    }

    .section.compact{
      padding: 40px 0;
    }

    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      font-size:12px;
      font-weight:700;
      letter-spacing:.26px;
      text-transform:uppercase;
      color:#d8e4ff;
      padding:8px 12px;
      border-radius:999px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.18);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.02);
    }

    .eyebrow .dot{
      width:8px;
      height:8px;
      border-radius:50%;
      background: linear-gradient(135deg, var(--warning), #ffd28c);
      box-shadow: 0 0 0 4px rgba(245,158,11,.12);
    }

    .section-head{
      display:flex;
      flex-direction:column;
      gap:12px;
      margin-bottom: 28px;
      max-width: 760px;
    }

    .section-head h2{
      margin:0;
      font-size: clamp(24px, 3vw, 36px);
      line-height:1.18;
      letter-spacing:-.02em;
    }

    .section-head p{
      margin:0;
      color:var(--muted);
      font-size:15px;
      max-width: 66ch;
    }

    .hero{
      padding-top: 26px;
      overflow:hidden;
    }

    .hero-grid{
      display:grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
      gap: 28px;
      align-items:stretch;
    }

    .hero-copy{
      padding: 30px 0 8px;
      position:relative;
    }

    .hero-copy h1{
      margin:18px 0 18px;
      font-size: clamp(34px, 5vw, 56px);
      line-height:1.12;
      letter-spacing:-.04em;
      max-width: 12.5ch;
    }

    .hero-copy .lead{
      margin:0;
      max-width: 62ch;
      font-size:16px;
      color:var(--muted);
    }

    .hero-chips{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top: 20px;
    }

    .chip{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:999px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.14);
      color:#dbe5ff;
      font-size:13px;
      line-height:1;
    }

    .chip .mini-dot{
      width:8px;
      height:8px;
      border-radius:50%;
      background: var(--accent);
      box-shadow: 0 0 0 4px rgba(34,211,238,.12);
    }

    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top: 28px;
    }

    .trust-row{
      display:flex;
      flex-wrap:wrap;
      gap:18px;
      margin-top: 22px;
      color: var(--subtle);
      font-size:14px;
    }

    .trust-item{
      display:inline-flex;
      align-items:center;
      gap:8px;
    }

    .trust-item::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background: linear-gradient(135deg, #34d399, #22d3ee);
      box-shadow: 0 0 0 4px rgba(34,211,238,.08);
    }

    .hero-panel{
      position:relative;
      padding: 22px;
      border-radius: var(--radius-xl);
      background:
        linear-gradient(180deg, rgba(255,255,255,.1), rgba(255,255,255,.05)),
        linear-gradient(135deg, rgba(15,23,48,.9), rgba(8,14,32,.9));
      border:1px solid rgba(151,171,255,.2);
      box-shadow: var(--shadow);
      overflow:hidden;
    }

    .hero-panel::before{
      content:"";
      position:absolute;
      inset:-1px;
      background: radial-gradient(circle at 12% 8%, rgba(79,140,255,.18), transparent 28%),
                  radial-gradient(circle at 86% 18%, rgba(139,92,246,.16), transparent 26%),
                  radial-gradient(circle at 50% 110%, rgba(34,211,238,.12), transparent 28%);
      pointer-events:none;
    }

    .panel-grid{
      position:relative;
      display:grid;
      gap:14px;
      z-index:1;
    }

    .panel-top{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:14px;
    }

    .panel-title{
      display:flex;
      flex-direction:column;
      gap:6px;
    }

    .panel-title strong{
      font-size:18px;
      letter-spacing:-.01em;
    }

    .panel-title span{
      color:var(--muted);
      font-size:14px;
    }

    .age-badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      min-height:38px;
      padding:0 14px;
      border-radius:999px;
      background: rgba(245,158,11,.12);
      border:1px solid rgba(245,158,11,.26);
      color:#ffe4b8;
      font-weight:700;
      font-size:13px;
      flex:0 0 auto;
    }

    .signal-stack{
      display:grid;
      gap:12px;
      grid-template-columns: 1.15fr .85fr;
    }

    .signal-card{
      padding:16px;
      border-radius: 20px;
      background: rgba(255,255,255,.06);
      border:1px solid rgba(151,171,255,.14);
      backdrop-filter: blur(16px);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
    }

    .signal-card h3{
      margin:0 0 8px;
      font-size:15px;
      line-height:1.35;
    }

    .signal-card p{
      margin:0;
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }

    .signal-big{
      grid-column:1 / -1;
      display:grid;
      grid-template-columns: 1fr auto;
      gap:16px;
      align-items:center;
      background:
        linear-gradient(135deg, rgba(79,140,255,.16), rgba(139,92,246,.1)),
        rgba(255,255,255,.06);
    }

    .signal-stats{
      display:grid;
      gap:12px;
      grid-template-columns: repeat(2, minmax(0,1fr));
    }

    .stat{
      padding: 16px;
      border-radius: 18px;
      background: rgba(5,8,22,.45);
      border:1px solid rgba(151,171,255,.14);
    }

    .stat strong{
      display:block;
      font-size:20px;
      line-height:1.1;
      margin-bottom:6px;
      letter-spacing:-.02em;
    }

    .stat span{
      font-size:13px;
      color:var(--muted);
      line-height:1.55;
    }

    .timeline{
      display:grid;
      gap:14px;
      margin-top: 28px;
      grid-template-columns: repeat(4, minmax(0,1fr));
    }

    .timeline-card{
      padding: 20px;
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.14);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.02);
      position:relative;
      overflow:hidden;
      min-height: 170px;
    }

    .timeline-card::after{
      content:"";
      position:absolute;
      right:-18px;
      top:-18px;
      width:90px;
      height:90px;
      border-radius:50%;
      background: radial-gradient(circle, rgba(79,140,255,.16), transparent 68%);
      pointer-events:none;
    }

    .timeline-top{
      display:flex;
      align-items:center;
      gap:10px;
      margin-bottom:14px;
    }

    .icon-circle{
      width:42px;
      height:42px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background: linear-gradient(135deg, rgba(79,140,255,.18), rgba(139,92,246,.16));
      border:1px solid rgba(151,171,255,.2);
      color:#dce7ff;
      font-size:18px;
      flex:0 0 auto;
    }

    .timeline-card h3{
      margin:0;
      font-size:17px;
      line-height:1.3;
    }

    .timeline-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.7;
    }

    .solution{
      padding-top: 14px;
    }

    .solution-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap: 24px;
      align-items:stretch;
    }

    .solution-core{
      position:relative;
      padding: 28px;
      border-radius: var(--radius-xl);
      background: linear-gradient(180deg, rgba(255,255,255,.09), rgba(255,255,255,.05));
      border:1px solid rgba(151,171,255,.18);
      box-shadow: var(--shadow);
      overflow:hidden;
    }

    .solution-core::before{
      content:"";
      position:absolute;
      inset:-1px;
      background:
        radial-gradient(circle at 14% 24%, rgba(34,211,238,.08), transparent 24%),
        radial-gradient(circle at 88% 22%, rgba(139,92,246,.15), transparent 22%),
        radial-gradient(circle at 50% 110%, rgba(79,140,255,.14), transparent 24%);
      pointer-events:none;
    }

    .solution-core-inner{
      position:relative;
      z-index:1;
    }

    .solution-core h3{
      margin:0 0 12px;
      font-size:24px;
      line-height:1.25;
    }

    .solution-core p{
      margin:0;
      max-width: 58ch;
      color:var(--muted);
      font-size:15px;
    }

    .solution-points{
      margin-top: 20px;
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap:12px;
    }

    .point{
      display:flex;
      gap:12px;
      padding:16px;
      border-radius:20px;
      background: rgba(5,8,22,.34);
      border:1px solid rgba(151,171,255,.14);
      min-height: 108px;
    }

    .point .icon{
      width:42px;
      height:42px;
      border-radius:14px;
      flex:0 0 auto;
      display:grid;
      place-items:center;
      background: linear-gradient(135deg, rgba(79,140,255,.16), rgba(34,211,238,.12));
      border:1px solid rgba(151,171,255,.18);
      font-size:18px;
    }

    .point h4{
      margin:0 0 6px;
      font-size:16px;
      line-height:1.35;
    }

    .point p{
      margin:0;
      font-size:13px;
      line-height:1.65;
      color:var(--muted);
    }

    .solution-aside{
      display:grid;
      gap:14px;
    }

    .aside-card{
      padding: 20px;
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.14);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
    }

    .aside-card h3{
      margin:0 0 10px;
      font-size:17px;
      line-height:1.35;
    }

    .aside-card p,
    .aside-card li{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.7;
    }

    .aside-list{
      margin:0;
      padding:0;
      list-style:none;
      display:grid;
      gap:10px;
    }

    .aside-list li{
      display:flex;
      align-items:flex-start;
      gap:10px;
    }

    .aside-list li::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      margin-top:8px;
      flex:0 0 auto;
      background: linear-gradient(135deg, var(--accent), var(--primary));
      box-shadow: 0 0 0 4px rgba(34,211,238,.08);
    }

    .pill-row{
      display:flex;
      flex-wrap:nowrap;
      gap:10px;
      overflow-x:auto;
      padding-bottom:4px;
      scrollbar-width:none;
    }

    .pill-row::-webkit-scrollbar{ display:none; }

    .pill{
      flex:0 0 auto;
      min-height:42px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:0 16px;
      border-radius:999px;
      border:1px solid rgba(151,171,255,.16);
      background: rgba(255,255,255,.05);
      color:#dce7ff;
      font-size:13px;
      font-weight:600;
    }

    .pill.active{
      background: linear-gradient(135deg, rgba(79,140,255,.24), rgba(139,92,246,.2));
      border-color: rgba(79,140,255,.46);
      color:#fff;
      box-shadow: 0 0 0 1px rgba(255,255,255,.02) inset;
    }

    .stream-grid{
      display:grid;
      grid-template-columns: minmax(0, 8fr) minmax(280px, 4fr);
      gap: 24px;
      align-items:start;
    }

    .feature-card{
      padding: 24px;
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(79,140,255,.12), rgba(139,92,246,.08)),
        rgba(255,255,255,.06);
      border:1px solid rgba(151,171,255,.16);
      box-shadow: var(--shadow);
      overflow:hidden;
      position:relative;
    }

    .feature-card::before{
      content:"";
      position:absolute;
      inset:auto -40px -55px auto;
      width:220px;
      height:220px;
      border-radius:50%;
      background: radial-gradient(circle, rgba(34,211,238,.14), transparent 65%);
      pointer-events:none;
    }

    .feature-top{
      display:flex;
      justify-content:space-between;
      gap:14px;
      align-items:flex-start;
      margin-bottom:18px;
    }

    .feature-title{
      display:flex;
      flex-direction:column;
      gap:8px;
    }

    .feature-title h3{
      margin:0;
      font-size:24px;
      line-height:1.22;
      letter-spacing:-.02em;
    }

    .feature-title p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      max-width: 56ch;
    }

    .feature-preview{
      width: 128px;
      aspect-ratio: 1 / 1;
      border-radius: 28px;
      background:
        radial-gradient(circle at 28% 28%, rgba(255,255,255,.38), transparent 18%),
        radial-gradient(circle at 68% 20%, rgba(34,211,238,.24), transparent 16%),
        linear-gradient(135deg, rgba(79,140,255,.42), rgba(139,92,246,.25));
      border:1px solid rgba(255,255,255,.16);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.12), 0 18px 40px rgba(0,0,0,.22);
      display:grid;
      place-items:center;
      color:#fff;
      font-weight:800;
      letter-spacing:.1em;
      position:relative;
      overflow:hidden;
    }

    .feature-preview::after{
      content:"精选";
      font-size:20px;
      text-shadow: 0 0 18px rgba(255,255,255,.22);
    }

    .feature-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top: 16px;
    }

    .tag{
      display:inline-flex;
      align-items:center;
      gap:6px;
      min-height:34px;
      padding:0 12px;
      border-radius:999px;
      background: rgba(255,255,255,.06);
      border:1px solid rgba(151,171,255,.14);
      color:#dbe5ff;
      font-size:12px;
      font-weight:600;
    }

    .tag.hot{
      background: rgba(245,158,11,.12);
      border-color: rgba(245,158,11,.22);
      color:#ffe4b8;
    }

    .tag.mint{
      background: rgba(34,211,238,.12);
      border-color: rgba(34,211,238,.18);
      color:#cffafe;
    }

    .feature-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top: 22px;
    }

    .metrics-grid{
      margin-top: 18px;
      display:grid;
      grid-template-columns: repeat(4, minmax(0,1fr));
      gap: 14px;
    }

    .metric{
      padding:16px 14px;
      border-radius: 18px;
      background: rgba(5,8,22,.34);
      border:1px solid rgba(151,171,255,.14);
      min-height: 96px;
    }

    .metric strong{
      display:block;
      font-size:20px;
      line-height:1.1;
      margin-bottom:8px;
      color:#fff;
    }

    .metric span{
      color:var(--muted);
      font-size:13px;
      line-height:1.6;
    }

    .content-list{
      display:grid;
      gap:14px;
      margin-top: 18px;
    }

    .content-card{
      display:grid;
      grid-template-columns: 140px minmax(0,1fr);
      gap:16px;
      padding: 16px;
      border-radius: 22px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.14);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.02);
      overflow:hidden;
    }

    .content-card:hover{
      transform: translateY(-2px);
      border-color: rgba(79,140,255,.3);
      box-shadow: 0 18px 34px rgba(0,0,0,.22), 0 0 0 1px rgba(79,140,255,.08) inset;
    }

    .thumb{
      border-radius: 18px;
      min-height: 110px;
      background:
        radial-gradient(circle at 30% 26%, rgba(255,255,255,.36), transparent 14%),
        radial-gradient(circle at 76% 24%, rgba(34,211,238,.24), transparent 18%),
        linear-gradient(135deg, rgba(79,140,255,.28), rgba(139,92,246,.18));
      border:1px solid rgba(255,255,255,.12);
      position:relative;
      overflow:hidden;
    }

    .thumb::after{
      content: attr(data-index);
      position:absolute;
      inset:auto 14px 12px auto;
      width:44px;
      height:44px;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:#fff;
      font-weight:800;
      background: rgba(5,8,22,.3);
      border:1px solid rgba(255,255,255,.12);
      backdrop-filter: blur(10px);
    }

    .content-body{
      min-width:0;
    }

    .content-head{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
      margin-bottom:8px;
    }

    .content-body h3{
      margin:0;
      font-size:17px;
      line-height:1.45;
      letter-spacing:-.01em;
    }

    .content-body p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.72;
    }

    .content-tags{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:12px;
    }

    .content-foot{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      justify-content:space-between;
      align-items:center;
      margin-top:14px;
      padding-top:12px;
      border-top:1px solid rgba(255,255,255,.08);
      color:var(--subtle);
      font-size:12px;
    }

    .content-foot .meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      align-items:center;
    }

    .content-foot .dot{
      width:4px;
      height:4px;
      border-radius:50%;
      background: rgba(169,180,208,.7);
    }

    .mini-cta{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:#e5ecff;
      font-weight:700;
      font-size:13px;
    }

    .mini-cta .arrow{
      transition: transform .22s ease;
    }

    .mini-cta:hover .arrow{
      transform: translateX(3px);
    }

    .sidebar{
      position:sticky;
      top: 124px;
      display:grid;
      gap:14px;
    }

    .notice{
      padding:20px;
      border-radius: var(--radius-lg);
      background: linear-gradient(180deg, rgba(245,158,11,.12), rgba(255,255,255,.05));
      border:1px solid rgba(245,158,11,.2);
    }

    .notice h3{
      margin:0 0 10px;
      font-size:17px;
      line-height:1.35;
      color:#ffe9bb;
    }

    .notice p{
      margin:0;
      color:#f3e1bc;
      font-size:14px;
      line-height:1.7;
    }

    .tag-cloud{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }

    .tag-cloud .tag{
      cursor:default;
    }

    .tip-list{
      display:grid;
      gap:10px;
      margin:0;
      padding:0;
      list-style:none;
    }

    .tip-list li{
      display:flex;
      gap:10px;
      color:var(--muted);
      font-size:14px;
      line-height:1.6;
    }

    .tip-list li::before{
      content:"✓";
      color: #7dd3fc;
      flex:0 0 auto;
      margin-top:1px;
    }

    .feedback-grid{
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap: 16px;
    }

    .quote-card{
      padding: 22px;
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.14);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.02);
      min-height: 180px;
    }

    .quote-card .mark{
      display:inline-flex;
      width:34px;
      height:34px;
      align-items:center;
      justify-content:center;
      border-radius:12px;
      background: linear-gradient(135deg, rgba(79,140,255,.18), rgba(139,92,246,.16));
      border:1px solid rgba(151,171,255,.18);
      margin-bottom:12px;
      color:#fff;
      font-size:18px;
    }

    .quote-card p{
      margin:0 0 16px;
      color:var(--text);
      font-size:15px;
      line-height:1.78;
    }

    .quote-card footer{
      color:var(--muted);
      font-size:13px;
    }

    .faq-grid{
      display:grid;
      gap:12px;
    }

    .faq-item{
      border-radius: 20px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.14);
      overflow:hidden;
    }

    .faq-toggle{
      width:100%;
      text-align:left;
      padding:18px 20px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      color:#f2f6ff;
      font-weight:700;
      font-size:15px;
    }

    .faq-toggle .chev{
      width:34px;
      height:34px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background: rgba(79,140,255,.12);
      border:1px solid rgba(151,171,255,.14);
      flex:0 0 auto;
      transition: transform .22s ease, background .22s ease;
    }

    .faq-item.open .faq-toggle .chev{
      transform: rotate(180deg);
      background: rgba(79,140,255,.18);
    }

    .faq-panel{
      display:none;
      padding:0 20px 18px;
      color:var(--muted);
      font-size:14px;
      line-height:1.78;
    }

    .faq-item.open .faq-panel{
      display:block;
    }

    .cta-band{
      padding: 28px;
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(79,140,255,.16), rgba(139,92,246,.12)),
        rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.18);
      box-shadow: var(--shadow);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      flex-wrap:wrap;
    }

    .cta-band h2{
      margin:0 0 8px;
      font-size: clamp(24px, 3vw, 34px);
      line-height:1.2;
    }

    .cta-band p{
      margin:0;
      color:var(--muted);
      max-width: 60ch;
      font-size:15px;
    }

    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
    }

    .breadcrumb{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
      color:var(--subtle);
      font-size:13px;
      margin-bottom: 14px;
    }

    .breadcrumb a{
      color:#cfe0ff;
    }

    .breadcrumb span.sep{
      opacity:.5;
    }

    .category-head{
      display:grid;
      grid-template-columns: minmax(0, 1fr) 300px;
      gap:18px;
      align-items:stretch;
      margin-bottom: 20px;
    }

    .category-intro,
    .category-meta{
      padding: 24px;
      border-radius: var(--radius-xl);
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.14);
      box-shadow: inset 0 1px 0 rgba(255,255,255,.02);
    }

    .category-intro h1{
      margin:0 0 10px;
      font-size: clamp(32px, 4.2vw, 48px);
      line-height:1.16;
      letter-spacing:-.04em;
    }

    .category-intro p{
      margin:0;
      color:var(--muted);
      font-size:15px;
      max-width: 60ch;
    }

    .category-meta{
      display:grid;
      gap:14px;
      align-content:start;
    }

    .meta-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }

    .meta-box{
      flex:1 1 0;
      min-width: 120px;
      padding: 14px;
      border-radius: 18px;
      background: rgba(5,8,22,.34);
      border:1px solid rgba(151,171,255,.14);
    }

    .meta-box strong{
      display:block;
      font-size:18px;
      margin-bottom:6px;
      line-height:1.1;
    }

    .meta-box span{
      color:var(--muted);
      font-size:13px;
      line-height:1.55;
    }

    .category-layout{
      display:grid;
      grid-template-columns: minmax(0, 1fr) 330px;
      gap: 24px;
      align-items:start;
      margin-top: 22px;
    }

    .stream-panel{
      display:grid;
      gap: 18px;
    }

    .list-compact{
      display:grid;
      gap: 12px;
    }

    .compact-item{
      display:grid;
      grid-template-columns: 1fr auto;
      gap: 14px;
      padding: 18px 18px 18px 20px;
      border-radius: 20px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(151,171,255,.14);
    }

    .compact-item h3{
      margin:0 0 8px;
      font-size:16px;
      line-height:1.45;
    }

    .compact-item p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.7;
    }

    .compact-side{
      display:flex;
      flex-direction:column;
      align-items:flex-end;
      justify-content:space-between;
      gap:10px;
      min-width: 96px;
    }

    .hotline{
      display:inline-flex;
      align-items:center;
      gap:6px;
      color:#ffe4b8;
      font-size:12px;
      font-weight:700;
      padding:6px 10px;
      border-radius:999px;
      background: rgba(245,158,11,.12);
      border:1px solid rgba(245,158,11,.2);
    }

    .small-link{
      display:inline-flex;
      align-items:center;
      gap:6px;
      color:#dbe5ff;
      font-size:13px;
      font-weight:700;
    }

    .small-link .arrow{
      transition: transform .22s ease;
    }

    .small-link:hover .arrow{
      transform: translateX(3px);
    }

    .footer-banner{
      margin-top: 74px;
    }

    .site-footer{
      margin-top: 86px;
      padding: 42px 0 24px;
      background: linear-gradient(180deg, rgba(5,8,22,.22), rgba(5,8,22,.9));
      border-top:1px solid rgba(151,171,255,.14);
      position:relative;
      overflow:hidden;
    }

    .site-footer::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 10% 0%, rgba(79,140,255,.12), transparent 22%),
        radial-gradient(circle at 90% 10%, rgba(139,92,246,.12), transparent 20%);
      pointer-events:none;
    }

    .site-footer .container{
      position:relative;
      z-index:1;
    }

    .footer-grid{
      display:grid;
      grid-template-columns: 1.4fr .8fr .8fr;
      gap: 24px;
      padding-bottom: 24px;
    }

    .footer-brand{
      font-size:16px;
      font-weight:800;
      margin-bottom: 12px;
    }

    .footer-text{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
      max-width: 58ch;
    }

    .footer-col h3{
      margin:0 0 12px;
      font-size:15px;
      color:#f2f6ff;
    }

    .footer-links{
      margin:0;
      padding:0;
      list-style:none;
      display:grid;
      gap:10px;
      color:var(--muted);
      font-size:14px;
    }

    .footer-links a{
      color:#dbe5ff;
    }

    .footer-links a:hover{
      color:#fff;
    }

    .footer-bottom{
      padding-top:18px;
      border-top:1px solid rgba(255,255,255,.08);
      display:flex;
      flex-wrap:wrap;
      justify-content:space-between;
      gap:12px;
      color:var(--subtle);
      font-size:13px;
    }

    .sr-only{
      position:absolute;
      width:1px;
      height:1px;
      padding:0;
      margin:-1px;
      overflow:hidden;
      clip:rect(0,0,0,0);
      white-space:nowrap;
      border:0;
    }

    @media (max-width: 1199px){
      .hero-grid,
      .solution-grid,
      .stream-grid,
      .category-head,
      .category-layout{
        grid-template-columns:1fr;
      }

      .sidebar{
        position:static;
      }

      .feedback-grid{
        grid-template-columns:1fr;
      }

      .footer-grid{
        grid-template-columns:1fr 1fr;
      }
    }

    @media (max-width: 991px){
      .timeline{
        grid-template-columns:repeat(2, minmax(0,1fr));
      }

      .metrics-grid{
        grid-template-columns:repeat(2, minmax(0,1fr));
      }

      .solution-points{
        grid-template-columns:1fr;
      }

      .content-card{
        grid-template-columns:120px minmax(0,1fr);
      }
    }

    @media (max-width: 767px){
      .site-header .container{
        padding-top:14px;
        padding-bottom:12px;
      }

      .nav-top{
        flex-wrap:wrap;
      }

      .brand{
        flex:1 1 auto;
      }

      .search-wrap{
        order:3;
        flex:1 1 100%;
        width:100%;
      }

      .nav-actions{
        order:2;
        margin-left:auto;
      }

      .hero-copy{
        padding-top: 6px;
      }

      .hero-copy h1{
        max-width: 100%;
        font-size: clamp(30px, 8vw, 38px);
      }

      .section{
        padding: 56px 0;
      }

      .timeline{
        grid-template-columns:1fr;
      }

      .content-card{
        grid-template-columns:1fr;
      }

      .thumb{
        min-height: 150px;
      }

      .feature-top{
        flex-direction:column;
      }

      .feature-preview{
        width: 100%;
        aspect-ratio: 16 / 8;
      }

      .footer-grid{
        grid-template-columns:1fr;
      }

      .cta-band{
        padding: 22px;
      }

      .category-intro h1{
        font-size: clamp(30px, 9vw, 40px);
      }

      .category-meta{
        gap:12px;
      }

      .meta-box{
        min-width: calc(50% - 5px);
      }
    }

    @media (max-width: 520px){
      .container{
        width:min(var(--container), calc(100% - 28px));
      }

      .nav-actions .btn{
        padding-inline:14px;
      }

      .hero-panel,
      .solution-core,
      .feature-card,
      .category-intro,
      .category-meta,
      .cta-band{
        border-radius: 24px;
      }

      .timeline-card,
      .aside-card,
      .quote-card,
      .notice{
        border-radius: 18px;
      }

      .signal-stack,
      .signal-stats,
      .metrics-grid{
        grid-template-columns:1fr;
      }

      .meta-box{
        min-width:100%;
      }

      .content-foot{
        align-items:flex-start;
      }

      .compact-item{
        grid-template-columns:1fr;
      }

      .compact-side{
        align-items:flex-start;
      }
    }