/* roulang page: index */
:root{
      --bg-main:#050B16;
      --bg-deep:#07172E;
      --bg-panel:rgba(12,26,48,.66);
      --bg-panel-strong:rgba(16,34,62,.88);
      --primary:#2EE8FF;
      --primary-2:#4D7CFF;
      --accent:#FF3D6E;
      --violet:#8B5CFF;
      --text-main:#F4F8FF;
      --text-soft:#D9E6F7;
      --text-muted:#A8B6CC;
      --line:rgba(132,197,255,.18);
      --line-strong:rgba(46,232,255,.42);
      --shadow:0 20px 60px rgba(0,0,0,.28), inset 0 1px 0 rgba(255,255,255,.06);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
      --container:1220px;
      --nav-h:72px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text-main);
      background:
        radial-gradient(circle at 16% 4%, rgba(46,232,255,.18), transparent 34%),
        radial-gradient(circle at 88% 12%, rgba(139,92,255,.20), transparent 34%),
        radial-gradient(circle at 78% 76%, rgba(255,61,110,.08), transparent 28%),
        linear-gradient(180deg,#050B16 0%,#07172E 42%,#04101F 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      z-index:-2;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(132,197,255,.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(132,197,255,.045) 1px, transparent 1px);
      background-size:42px 42px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.72), transparent 82%);
    }
    body::after{
      content:"";
      position:fixed;
      inset:0;
      z-index:-1;
      pointer-events:none;
      opacity:.08;
      background:
        repeating-linear-gradient(0deg, rgba(255,255,255,.2) 0 1px, transparent 1px 3px);
      mix-blend-mode:soft-light;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{border:0;cursor:pointer}
    .container{width:min(var(--container), calc(100% - 40px));margin-inline:auto}
    .section{padding:96px 0;position:relative}
    .section-tight{padding:74px 0}
    .section-head{margin-bottom:34px;display:flex;align-items:flex-end;justify-content:space-between;gap:28px}
    .eyebrow,.badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      border:1px solid rgba(46,232,255,.26);
      background:rgba(46,232,255,.08);
      color:#CFFAFF;
      border-radius:999px;
      padding:7px 12px;
      font-size:13px;
      line-height:1.2;
      box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
    }
    .eyebrow::before{
      content:"";
      width:7px;height:7px;border-radius:50%;
      background:var(--primary);
      box-shadow:0 0 14px rgba(46,232,255,.9);
    }
    h1,h2,h3{line-height:1.18;letter-spacing:-.02em}
    h1{font-size:clamp(38px,5vw,64px);font-weight:800}
    h2{font-size:clamp(28px,3.2vw,42px);font-weight:780}
    h3{font-size:22px;font-weight:740}
    p{color:var(--text-muted)}
    .lead{font-size:17px;color:var(--text-soft);max-width:720px}
    .text-gradient{
      background:linear-gradient(135deg,#fff 0%,#B9F8FF 38%,#87A7FF 76%);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }

    .site-header{
      position:fixed;
      top:18px;
      left:0;
      right:0;
      z-index:50;
      pointer-events:none;
    }
    .nav-shell{
      width:min(1120px, calc(100% - 32px));
      margin:auto;
      min-height:var(--nav-h);
      pointer-events:auto;
      border-radius:999px;
      background:rgba(8,18,38,.68);
      backdrop-filter:blur(18px) saturate(140%);
      border:1px solid rgba(132,197,255,.22);
      box-shadow:0 18px 48px rgba(0,0,0,.38), inset 0 1px 0 rgba(255,255,255,.08);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:10px 12px 10px 18px;
    }
    .logo{
      display:flex;
      align-items:center;
      gap:11px;
      min-width:max-content;
    }
    .logo-mark{
      width:40px;height:40px;border-radius:50%;
      position:relative;
      background46,232,255,.22);
      background:radial-gradient(circle at 32% 30%, rgba(46,232,255,.92), rgba(46,232,255,.08) 42%, transparent 46%);
    }
    .logo-mark::after{
      content:"";
      position:absolute;
      inset:15px 12px 10px 12px;
      border-radius:12px 12px 16px 16px;
      border:1px solid rgba(255,255,255,.14);
      transform:skewY(-8deg);
      box-shadow:0 0 16px rgba(77,124,255,.2);
    }
    .logo-text{display:flex;flex-direction:column;gap:2px}
    .logo-text strong{font-size:16px;letter-spacing:.02em}
    .logo-text span{font-size:12px;color:var(--text-muted)}
    .nav-links{
      display:flex;
      align-items:center;
      gap:6px;
      padding:4px;
      border-radius:999px;
      background:rgba(5,11,22,.22);
      border:1px solid rgba(132,197,255,.10);
    }
    .nav-links a{
      position:relative;
      padding:12px 15px;
      border-radius:999px;
      color:var(--text-muted);
      font-size:14px;
      transition:all .24s ease;
      white-space:nowrap;
    }
    .nav-links a:hover,
    .nav-links a:focus-visible,
    .nav-links a.active{
      color:var(--text-main);
      background:rgba(46,232,255,.10);
      box-shadow:inset 0 0 0 1px rgba(46,232,255,.20),0 0 20px rgba(46,232,255,.10);
      outline:none;
    }
    .nav-links a.active::after{
      content:"";
      position:absolute;
      left:50%;
      bottom:7px;
      width:22px;
      height:2px;
      border-radius:999px;
      transform:translateX(-50%);
      background:linear-gradient(90deg,var(--primary),var(--primary-2));
      box-shadow:0 0 12px rgba(46,232,255,.55);
    }
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:0 18px;
      border-radius:999px;
      font-size:14px;
      font-weight:650;
      transition:transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease, color .22s ease;
      white-space:nowrap;
      letter-spacing:.01em;
    }
    .btn:hover{transform:translateY(-2px)}
    .btn:active{transform:translateY(0)}
    .btn:focus-visible{outline:2px solid rgba(46,232,255,.55);outline-offset:2px}
    .btn-primary{
      color:#05101E;
      background:linear-gradient(135deg,var(--primary),var(--primary-2) 58%,var(--violet));
      box-shadow:0 0 28px rgba(46,232,255,.24);
    }
    .btn-primary:hover{box-shadow:0 0 34px rgba(46,232,255,.34)}
    .btn-secondary{
      color:var(--text-main);
      background:rgba(255,255,255,.04);
      border:1px solid rgba(132,197,255,.22);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
    }
    .btn-secondary:hover{border-color:rgba(46,232,255,.44);background:rgba(46,232,255,.08)}
    .menu-btn{
      display:none;
      width:46px;height:46px;
      align-items:center;
      justify-content:center;
      border-radius:999px;
      color:var(--text-main);
      background:rgba(255,255,255,.04);
      border:1px solid rgba(132,197,255,.18);
    }
    .menu-btn span{
      position:relative;
      width:18px;
      height:2px;
      border-radius:999px;
      background:currentColor;
      display:block;
    }
    .menu-btn span::before,
    .menu-btn span::after{
      content:"";
      position:absolute;
      left:0;
      width:18px;height:2px;border-radius:999px;
      background:currentColor;
      transition:transform .22s ease, top .22s ease;
    }
    .menu-btn span::before{top:-6px}
    .menu-btn span::after{top:6px}
    .menu-btn[aria-expanded="true"] span{background:transparent}
    .menu-btn[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
    .menu-btn[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}
    .mobile-panel{
      display:none;
      width:min(1120px, calc(100% - 32px));
      margin:10px auto 0;
      pointer-events:auto;
      background:rgba(8,18,38,.88);
      backdrop-filter:blur(18px) saturate(140%);
      border:1px solid rgba(132,197,255,.18);
      border-radius:24px;
      box-shadow:0 18px 48px rgba(0,0,0,.36);
      padding:12px;
    }
    .mobile-panel a{
      display:flex;
      justify-content:space-between;
      align-items:center;
      padding:14px 14px;
      border-radius:16px;
      color:var(--text-main);
      background:rgba(255,255,255,.03);
      border:1px solid rgba(132,197,255,.10);
      margin-top:8px;
    }
    .mobile-panel a:first-child{margin-top:0}
    .mobile-panel a.active{background:rgba(46,232,255,.10);border-color:rgba(46,232,255,.22)}
    .hero{
      padding-top:132px;
      min-height:100vh;
      display:flex;
      align-items:center;
      position:relative;
      overflow:hidden;
    }
    .hero::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(90deg, rgba(5,11,22,.88) 0%, rgba(5,11,22,.64) 46%, rgba(5,11,22,.16) 100%),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity:.96;
      z-index:-2;
    }
    .hero::after{
      content:"";
      position:absolute;
      inset:0;
      z-index:-1;
      background:linear-gradient(180deg, rgba(5,11,22,.18) 0%, rgba(5,11,22,.50) 100%);
    }
    .hero-grid{
      display:grid;
      grid-template-columns:minmax(0,1.1fr) minmax(360px,.9fr);
      gap:34px;
      align-items:center;
    }
    .hero-copy{max-width:720px}
    .hero-copy h1{margin:16px 0 18px}
    .hero-copy .lead{max-width:650px}
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin:28px 0 18px;
    }
    .trust-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
    }
    .trust-row .trust{
      padding:10px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.04);
      border:1px solid rgba(132,197,255,.14);
      color:var(--text-soft);
      font-size:13px;
    }
    .hero-panel{
      position:relative;
      background:linear-gradient(180deg, rgba(16,34,62,.92), rgba(10,20,38,.82));
      border:1px solid rgba(132,197,255,.20);
      border-radius:32px;
      padding:22px;
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .hero-panel::before{
      content:"";
      position:absolute;
      inset:-1px;
      background:
        radial-gradient(circle at 20% 0%, rgba(46,232,255,.16), transparent 28%),
        radial-gradient(circle at 90% 12%, rgba(139,92,255,.16), transparent 24%),
        linear-gradient(180deg, rgba(255,255,255,.03), transparent 28%);
      pointer-events:none;
    }
    .panel-top{
      position:relative;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      margin-bottom:18px;
    }
    .panel-top .state{
      display:flex;
      align-items:center;
      gap:10px;
      font-size:14px;
      color:var(--text-soft);
    }
    .pulse{
      width:10px;height:10px;border-radius:50%;
      background:#38F0A7;
      box-shadow:0 0 0 6px rgba(56,240,167,.08),0 0 18px rgba(56,240,167,.5);
    }
    .panel-grid{
      position:relative;
      display:grid;
      gap:14px;
    }
    .panel-step{
      display:grid;
      grid-template-columns:54px 1fr;
      gap:14px;
      align-items:start;
      padding:16px;
      border-radius:22px;
      background:rgba(255,255,255,.04);
      border:1px solid rgba(132,197,255,.14);
    }
    .step-num{
      width:54px;height:54px;border-radius:18px;
      display:grid;place-items:center;
      color:#07101F;
      background:linear-gradient(135deg,var(--primary),#EAFDFF);
      font-weight:800;
      box-shadow:0 0 20px rgba(46,232,255,.24);
    }
    .panel-step h3{font-size:18px;margin-bottom:6px}
    .panel-step p{font-size:14px;color:var(--text-muted)}
    .panel-metrics{
      position:relative;
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:10px;
      margin-top:16px;
    }
    .metric{
      padding:14px 12px;
      border-radius:18px;
      background:rgba(5,11,22,.36);
      border:1px solid rgba(132,197,255,.14);
    }
    .metric strong{
      display:block;
      font-size:18px;
      margin-bottom:4px;
      color:#F7FDFF;
    }
    .metric span{font-size:12px;color:var(--text-muted)}
    .hero-note{
      position:relative;
      margin-top:16px;
      padding:13px 15px;
      border-left:3px solid rgba(46,232,255,.7);
      border-radius:14px;
      background:rgba(46,232,255,.06);
      color:var(--text-soft);
      font-size:14px;
    }
    .section-card{
      background:var(--bg-panel);
      border:1px solid var(--line);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow);
      backdrop-filter:blur(16px);
    }
    .value-grid{
      display:grid;
      gap:14px;
    }
    .value-item{
      display:grid;
      grid-template-columns:72px 1fr;
      gap:18px;
      align-items:center;
      padding:18px 20px;
      border-radius:24px;
      background:rgba(255,255,255,.03);
      border:1px solid rgba(132,197,255,.14);
      transition:transform .22s ease,border-color .22s ease,background .22s ease;
    }
    .value-item:hover{
      transform:translateY(-3px);
      border-color:rgba(46,232,255,.34);
      background:rgba(46,232,255,.05);
    }
    .value-index{
      width:72px;height:72px;border-radius:24px;
      display:grid;place-items:center;
      color:var(--primary);
      background:linear-gradient(180deg, rgba(46,232,255,.12), rgba(77,124,255,.05));
      border:1px solid rgba(46,232,255,.18);
      font-weight:800;
      font-size:24px;
      box-shadow:inset 0 0 0 1px rgba(255,255,255,.04);
    }
    .value-item h3{margin-bottom:5px}
    .value-item p{font-size:15px;max-width:860px}
    .split-head{
      display:flex;
      justify-content:space-between;
      gap:16px;
      align-items:flex-end;
      margin-bottom:22px;
    }
    .split-head .lead{max-width:760px}
    .feature-layout{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:18px;
      align-items:stretch;
    }
    .feature-main{
      position:relative;
      overflow:hidden;
      padding:24px;
      border-radius:28px;
      background:
        linear-gradient(180deg, rgba(16,34,62,.94), rgba(8,18,38,.82)),
        url('/assets/images/coverpic/cover-1.webp') right bottom/cover no-repeat;
      border:1px solid rgba(132,197,255,.18);
      min-height:320px;
    }
    .feature-main::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(90deg, rgba(8,18,38,.36), rgba(8,18,38,.72) 66%, rgba(8,18,38,.90));
      pointer-events:none;
    }
    .feature-main > *{position:relative;z-index:1}
    .feature-main h3{font-size:28px;margin:12px 0}
    .feature-main p{max-width:520px}
    .feature-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .tag{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:8px 11px;
      border-radius:999px;
      background:rgba(255,255,255,.04);
      color:var(--text-soft);
      font-size:13px;
      border:1px solid rgba(132,197,255,.14);
    }
    .mini-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:14px;
    }
    .mini-card{
      padding:18px;
      border-radius:24px;
      background:rgba(255,255,255,.04);
      border:1px solid rgba(132,197,255,.15);
      min-height:150px;
      transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
    }
    .mini-card:hover{
      transform:translateY(-3px);
      border-color:rgba(46,232,255,.34);
      box-shadow:0 0 24px rgba(46,232,255,.10);
    }
    .mini-card .mini-icon{
      width:40px;height:40px;border-radius:14px;
      display:grid;place-items:center;
      margin-bottom:12px;
      color:#06101D;
      background:linear-gradient(135deg,var(--primary),#fff);
      font-weight:800;
    }
    .mini-card h3{font-size:18px;margin-bottom:7px}
    .mini-card p{font-size:14px}
    .scenario-grid{
      display:grid;
      gap:16px;
    }
    .scenario{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:18px;
      align-items:center;
      padding:16px;
      border-radius:28px;
      background:rgba(255,255,255,.03);
      border:1px solid rgba(132,197,255,.14);
      overflow:hidden;
    }
    .scenario.reverse .scenario-copy{order:2}
    .scenario.reverse .scenario-media{order:1}
    .scenario-media{
      position:relative;
      min-height:240px;
      border-radius:22px;
      overflow:hidden;
      background:#091122;
    }
    .scenario-media img{
      width:100%;
      height:100%;
      object-fit:cover;
      filter:saturate(1.02) contrast(1.04);
      transform:scale(1.02);
    }
    .scenario-media::after{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(180deg, rgba(5,11,22,.04), rgba(5,11,22,.80)),
        radial-gradient(circle at 20% 12%, rgba(46,232,255,.14), transparent 34%);
      pointer-events:none;
    }
    .scenario-copy{
      padding:10px 8px;
    }
    .scenario-copy h3{margin:10px 0 8px}
    .scenario-copy p{margin-bottom:14px}
    .chip-row{display:flex;flex-wrap:wrap;gap:8px}
    .chip{
      padding:7px 10px;
      border-radius:999px;
      background:rgba(46,232,255,.08);
      border:1px solid rgba(46,232,255,.18);
      color:#DFFBFF;
      font-size:12px;
    }
    .effect-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
    }
    .effect-card{
      padding:20px;
      border-radius:24px;
      background:rgba(255,255,255,.04);
      border:1px solid rgba(132,197,255,.14);
      position:relative;
      overflow:hidden;
    }
    .effect-card::before{
      content:"";
      position:absolute;
      inset:auto -10% -30% -10%;
      height:120px;
      background:radial-gradient(circle, rgba(46,232,255,.20), transparent 70%);
      pointer-events:none;
    }
    .effect-card strong{
      display:block;
      font-size:24px;
      margin-bottom:8px;
      color:#F9FDFF;
    }
    .progress{
      margin:14px 0 10px;
      height:9px;
      border-radius:999px;
      background:rgba(255,255,255,.06);
      overflow:hidden;
    }
    .progress span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--primary),var(--primary-2),var(--violet));
      box-shadow:0 0 18px rgba(46,232,255,.2);
    }
    .effect-card p{font-size:14px}
    .plan-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
      align-items:stretch;
    }
    .plan-card{
      padding:22px;
      border-radius:28px;
      background:rgba(255,255,255,.035);
      border:1px solid rgba(132,197,255,.14);
      position:relative;
      transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
    }
    .plan-card:hover{
      transform:translateY(-3px);
      border-color:rgba(46,232,255,.34);
      box-shadow:0 0 28px rgba(46,232,255,.10);
    }
    .plan-card.recommended{
      background:linear-gradient(180deg, rgba(46,232,255,.12), rgba(255,255,255,.04));
      border-color:rgba(46,232,255,.28);
    }
    .plan-pill{
      display:inline-flex;
      align-items:center;
      padding:7px 11px;
      border-radius:999px;
      background:rgba(255,255,255,.06);
      border:1px solid rgba(132,197,255,.14);
      color:var(--text-soft);
      font-size:13px;
      margin-bottom:14px;
    }
    .plan-card h3{margin-bottom:8px}
    .plan-card ul{
      list-style:none;
      display:grid;
      gap:10px;
      margin:14px 0 18px;
    }
    .plan-card li{
      position:relative;
      padding-left:18px;
      color:var(--text-soft);
      font-size:14px;
    }
    .plan-card li::before{
      content:"";
      position:absolute;
      left:0;top:.7em;
      width:7px;height:7px;border-radius:50%;
      background:var(--primary);
      box-shadow:0 0 10px rgba(46,232,255,.55);
    }
    .faq-wrap{
      display:grid;
      gap:12px;
    }
    details.faq{
      border-radius:20px;
      background:rgba(255,255,255,.035);
      border:1px solid rgba(132,197,255,.14);
      overflow:hidden;
      transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
    }
    details.faq[open]{
      border-color:rgba(46,232,255,.26);
      box-shadow:0 0 22px rgba(46,232,255,.08);
    }
    details.faq summary{
      list-style:none;
      cursor:pointer;
      padding:18px 20px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      font-weight:650;
      color:var(--text-main);
    }
    details.faq summary::-webkit-details-marker{display:none}
    details.faq summary span:last-child{
      color:var(--primary);
      font-size:20px;
      transition:transform .22s ease;
    }
    details.faq[open] summary span:last-child{transform:rotate(45deg)}
    .faq-body{
      padding:0 20px 18px;
      color:var(--text-muted);
      font-size:14px;
    }
    .cta-block{
      position:relative;
      overflow:hidden;
      background:
        radial-gradient(circle at 18% 12%, rgba(46,232,255,.24), transparent 30%),
        radial-gradient(circle at 84% 34%, rgba(139,92,255,.22), transparent 28%),
        linear-gradient(180deg, rgba(16,34,62,.94), rgba(8,18,38,.92));
      border:1px solid rgba(132,197,255,.20);
      border-radius:34px;
      box-shadow:0 26px 68px rgba(0,0,0,.34);
      padding:30px;
    }
    .cta-block::after{
      content:"";
      position:absolute;
      inset:auto -20% -55% -20%;
      height:220px;
      background:radial-gradient(circle, rgba(46,232,255,.16), transparent 68%);
      pointer-events:none;
    }
    .cta-inner{
      position:relative;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .cta-inner p{max-width:680px}
    .cta-actions{display:flex;flex-wrap:wrap;gap:12px}
    .footer{
      padding:34px 0 48px;
      color:var(--text-muted);
    }
    .footer-shell{
      padding:26px;
      border-radius:28px;
      background:linear-gradient(180deg, rgba(8,18,38,.88), rgba(5,11,22,.92));
      border:1px solid rgba(132,197,255,.12);
      box-shadow:0 18px 48px rgba(0,0,0,.28);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr .9fr;
      gap:20px;
      margin-bottom:20px;
    }
    .footer h3{font-size:18px;margin-bottom:14px}
    .footer p{font-size:14px;max-width:420px}
    .footer-links{
      display:grid;
      gap:10px;
    }
    .footer-links a{
      color:var(--text-soft);
      font-size:14px;
      width:max-content;
      transition:color .22s ease,transform .22s ease;
    }
    .footer-links a:hover{color:#fff;transform:translateX(3px)}
    .footer-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .footer-tag{
      padding:8px 10px;
      border-radius:999px;
      border:1px solid rgba(132,197,255,.12);
      background:rgba(255,255,255,.03);
      font-size:13px;
      color:var(--text-soft);
    }
    .footer-meta{
      padding-top:18px;
      border-top:1px solid rgba(132,197,255,.12);
      display:flex;
      justify-content:space-between;
      gap:14px;
      flex-wrap:wrap;
      font-size:13px;
    }
    .text-link{
      display:inline-flex;
      align-items:center;
      gap:6px;
      color:#C9F8FF;
      font-weight:600;
    }
    .text-link::after{
      content:"→";
      transition:transform .22s ease;
    }
    .text-link:hover::after{transform:translateX(3px)}
    .section-title{
      display:flex;
      flex-direction:column;
      gap:10px;
      max-width:760px;
    }
    .small-muted{font-size:14px;color:var(--text-muted)}
    .divider{
      height:1px;
      background:linear-gradient(90deg, transparent, rgba(132,197,255,.22), transparent);
      margin:0 0 22px;
    }

    @media (max-width: 1120px){
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .mobile-panel{display:block}
      .mobile-panel[hidden]{display:none}
      .hero-grid,.feature-layout,.scenario,.footer-grid,.cta-inner{grid-template-columns:1fr}
      .hero-grid{grid-template-columns:1fr}
      .feature-layout,.scenario{grid-template-columns:1fr}
      .effect-grid,.plan-grid{grid-template-columns:1fr}
      .mini-grid{grid-template-columns:1fr 1fr}
      .cta-inner{display:grid}
    }
    @media (max-width: 768px){
      .section{padding:68px 0}
      .hero{padding-top:116px;min-height:auto}
      .site-header{top:10px}
      .nav-shell,.mobile-panel{width:calc(100% - 18px)}
      .nav-actions .btn-secondary{display:none}
      .hero-panel{padding:18px;border-radius:26px}
      .panel-metrics{grid-template-columns:1fr}
      .value-item{grid-template-columns:1fr;gap:12px}
      .value-index{width:58px;height:58px;border-radius:18px;font-size:20px}
      .scenario{padding:14px}
      .scenario-media{min-height:210px}
      .split-head{align-items:flex-start;flex-direction:column}
      .mini-grid{grid-template-columns:1fr}
      .footer-shell{padding:20px}
      .footer-grid{grid-template-columns:1fr}
      .cta-block{padding:22px}
      .hero-actions,.cta-actions{flex-direction:column}
      .hero-actions .btn,.cta-actions .btn{width:100%}
    }
    @media (max-width: 520px){
      .container{width:min(var(--container), calc(100% - 24px))}
      .nav-shell{padding:10px}
      .logo-text span{display:none}
      .logo-mark{width:36px;height:36px}
      .hero-copy h1{font-size:clamp(34px,9vw,42px)}
      .lead{font-size:15px}
      .panel-step{grid-template-columns:1fr}
      .step-num{width:46px;height:46px;border-radius:16px;font-size:15px}
      .cta-block,.hero-panel,.plan-card,.mini-card,.effect-card{border-radius:22px}
      .footer-meta{flex-direction:column}
    }

/* roulang page: category1 */
:root{
      --bg-main:#050B16;
      --bg-deep:#07172E;
      --bg-panel:rgba(12,26,48,.68);
      --bg-panel-soft:rgba(12,26,48,.46);
      --bg-panel-strong:rgba(16,34,62,.88);
      --primary:#2EE8FF;
      --primary-2:#4D7CFF;
      --accent:#FF3D6E;
      --violet:#8B5CFF;
      --text-main:#F4F8FF;
      --text-muted:#A8B6CC;
      --text-faint:#7E8EA8;
      --line:rgba(132,197,255,.18);
      --line-strong:rgba(46,232,255,.42);
      --shadow:0 24px 70px rgba(0,0,0,.35);
      --shadow-glow:0 0 34px rgba(46,232,255,.16);
      --radius-lg:28px;
      --radius-md:22px;
      --radius-sm:16px;
      --container:1200px;
      --nav-height:76px;
      --font:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    }

    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{
      min-height:100vh;
      font-family:var(--font);
      color:var(--text-main);
      background:
        radial-gradient(circle at 12% 4%,rgba(46,232,255,.14),transparent 34%),
        radial-gradient(circle at 86% 8%,rgba(139,92,255,.16),transparent 36%),
        radial-gradient(circle at 78% 72%,rgba(255,61,110,.08),transparent 28%),
        linear-gradient(180deg,#050B16 0%,#07172E 48%,#040B14 100%);
      line-height:1.75;
      overflow-x:hidden;
    }

    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(132,197,255,.045) 1px,transparent 1px),
        linear-gradient(90deg,rgba(132,197,255,.045) 1px,transparent 1px);
      background-size:48px 48px;
      mask-image:linear-gradient(to bottom,rgba(0,0,0,.7),transparent 78%);
      z-index:-2;
    }

    body::after{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background:radial-gradient(circle,rgba(255,255,255,.06) 1px,transparent 1px);
      background-size:4px 4px;
      opacity:.16;
      z-index:-1;
    }

    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    button,input,textarea{font:inherit}
    button{border:0;cursor:pointer}
    section{position:relative}
    ::selection{background:rgba(46,232,255,.28);color:#fff}

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

    .site-header{
      position:fixed;
      top:18px;
      left:0;
      right:0;
      z-index:50;
      pointer-events:none;
    }

    .nav-shell{
      width:min(calc(100% - 32px),1120px);
      margin:auto;
      min-height:var(--nav-height);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:12px 14px 12px 18px;
      border:1px solid rgba(132,197,255,.22);
      border-radius:999px;
      background:rgba(8,18,38,.68);
      backdrop-filter:blur(18px) saturate(140%);
      box-shadow:0 20px 70px rgba(0,0,0,.32),inset 0 1px 0 rgba(255,255,255,.08);
      pointer-events:auto;
    }

    .logo{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:max-content;
    }

    .logo-mark{
      width:38px;
      height:38px;
      border-radius:50%;
      position:relative;
      background:
        radial-gradient(circle at 55% 38%,rgba(46,232,255,.95),rgba(46,232,255,.18) 34%,transparent 35%),
        conic-gradient(from 40deg,rgba(46,232,255,.25),rgba(77,124,255,.95),rgba(255,61,110,.55),rgba(46,232,255,.25));
      box-shadow:0 0 28px rgba(46,232,255,.3);
      flex:0 0 auto;
    }

    .logo-mark::before{
      content:"";
      position:absolute;
      inset:8px;
      border-radius:50%;
      background:rgba(5,11,22,.9);
      border:1px solid rgba(244,248,255,.14);
    }

    .logo-mark::after{
      content:"";
      position:absolute;
      width:14px;
      height:3px;
      border-radius:999px;
      background:var(--accent);
      right:3px;
      top:18px;
      box-shadow:0 0 16px rgba(255,61,110,.58);
      transform:rotate(-18deg);
    }

    .logo-text{
      display:flex;
      flex-direction:column;
      line-height:1.18;
    }

    .logo-text strong{
      font-size:18px;
      letter-spacing:.02em;
      color:#fff;
      font-weight:800;
    }

    .logo-text span{
      font-size:12px;
      color:var(--primary);
      letter-spacing:.08em;
      margin-top:3px;
    }

    .nav-links{
      display:flex;
      align-items:center;
      justify-content:center;
      gap:6px;
      padding:6px;
      border-radius:999px;
      background:rgba(255,255,255,.035);
      border:1px solid rgba(255,255,255,.055);
    }

    .nav-links a{
      position:relative;
      min-height:42px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:0 18px;
      border-radius:999px;
      color:var(--text-muted);
      font-size:15px;
      transition:background .25s ease,color .25s ease,box-shadow .25s ease;
    }

    .nav-links a:hover{
      color:#fff;
      background:rgba(46,232,255,.08);
    }

    .nav-links a.active{
      color:#fff;
      background:linear-gradient(135deg,rgba(46,232,255,.18),rgba(77,124,255,.15));
      box-shadow:inset 0 0 0 1px rgba(46,232,255,.24),0 0 22px rgba(46,232,255,.12);
    }

    .nav-links a.active::after{
      content:"";
      position:absolute;
      width:6px;
      height:6px;
      border-radius:50%;
      bottom:5px;
      background:var(--primary);
      box-shadow:0 0 12px var(--primary);
    }

    .nav-actions{
      display:flex;
      align-items:center;
      gap:10px;
    }

    .menu-toggle{
      display:none;
      width:46px;
      height:46px;
      border-radius:50%;
      background:rgba(255,255,255,.06);
      border:1px solid var(--line);
      color:#fff;
      align-items:center;
      justify-content:center;
      transition:background .25s ease,border-color .25s ease;
    }

    .menu-toggle span,
    .menu-toggle span::before,
    .menu-toggle span::after{
      width:18px;
      height:2px;
      display:block;
      border-radius:999px;
      background:#fff;
      position:relative;
      transition:transform .25s ease,top .25s ease,opacity .25s ease;
    }

    .menu-toggle span::before,
    .menu-toggle span::after{
      content:"";
      position:absolute;
      left:0;
    }

    .menu-toggle span::before{top:-6px}
    .menu-toggle span::after{top:6px}
    .menu-toggle[aria-expanded="true"] span{background:transparent}
    .menu-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
    .menu-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

    .btn{
      min-height:46px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      padding:0 22px;
      border-radius:999px;
      font-weight:700;
      font-size:15px;
      line-height:1;
      transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease,background .25s ease;
      white-space:nowrap;
    }

    .btn-primary{
      color:#03111D;
      background:linear-gradient(135deg,#2EE8FF,#4D7CFF 62%,#8B5CFF);
      box-shadow:0 0 28px rgba(46,232,255,.28),inset 0 1px 0 rgba(255,255,255,.35);
    }

    .btn-secondary{
      color:#fff;
      background:rgba(255,255,255,.055);
      border:1px solid var(--line);
    }

    .btn:hover{
      transform:translateY(-2px);
      box-shadow:0 0 34px rgba(46,232,255,.22),0 14px 32px rgba(0,0,0,.24);
    }

    .btn:active{transform:translateY(0) scale(.98)}
    .btn:focus-visible,
    a:focus-visible,
    summary:focus-visible,
    input:focus-visible,
    textarea:focus-visible{
      outline:3px solid rgba(46,232,255,.44);
      outline-offset:3px;
    }

    .hero{
      min-height:560px;
      padding:150px 0 76px;
      overflow:hidden;
    }

    .hero::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(90deg,rgba(5,11,22,.92),rgba(5,11,22,.62),rgba(5,11,22,.9)),
        url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
      opacity:.86;
      z-index:-2;
    }

    .hero::after{
      content:"";
      position:absolute;
      left:8%;
      right:8%;
      bottom:0;
      height:1px;
      background:linear-gradient(90deg,transparent,rgba(46,232,255,.5),transparent);
      z-index:-1;
    }

    .hero-grid{
      display:grid;
      grid-template-columns:minmax(0,1.05fr) minmax(360px,.82fr);
      gap:44px;
      align-items:center;
    }

    .badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      min-height:34px;
      padding:6px 12px;
      border-radius:999px;
      color:#DDFBFF;
      background:rgba(46,232,255,.08);
      border:1px solid rgba(46,232,255,.26);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
      font-size:14px;
      font-weight:650;
    }

    .badge::before{
      content:"";
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--primary);
      box-shadow:0 0 14px var(--primary);
    }

    h1{
      margin-top:22px;
      max-width:780px;
      font-size:clamp(36px,5vw,58px);
      line-height:1.12;
      letter-spacing:-.035em;
      font-weight:850;
    }

    .gradient-text{
      background:linear-gradient(135deg,#fff 8%,#B8F8FF 42%,#7FA3FF 72%,#FF9BB5);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }

    .hero-lead{
      max-width:720px;
      margin-top:22px;
      color:var(--text-muted);
      font-size:17px;
      line-height:1.85;
    }

    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-top:30px;
    }

    .hero-notes{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:24px;
    }

    .note{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.045);
      border:1px solid rgba(255,255,255,.08);
      color:#DCE7F8;
      font-size:14px;
    }

    .note i{
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 12px rgba(255,61,110,.62);
      display:inline-block;
    }

    .index-panel{
      position:relative;
      padding:24px;
      border-radius:var(--radius-lg);
      background:linear-gradient(180deg,rgba(16,34,62,.82),rgba(9,20,39,.72));
      border:1px solid rgba(132,197,255,.22);
      box-shadow:var(--shadow),var(--shadow-glow);
      backdrop-filter:blur(16px);
      overflow:hidden;
    }

    .index-panel::before{
      content:"";
      position:absolute;
      inset:-40% -20% auto auto;
      width:260px;
      height:260px;
      border-radius:50%;
      background:radial-gradient(circle,rgba(46,232,255,.2),transparent 68%);
      pointer-events:none;
    }

    .panel-top{
      display:flex;
      justify-content:space-between;
      gap:16px;
      align-items:center;
      padding-bottom:18px;
      border-bottom:1px solid var(--line);
    }

    .panel-top strong{font-size:18px}
    .status{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:6px 10px;
      border-radius:999px;
      background:rgba(46,232,255,.09);
      border:1px solid rgba(46,232,255,.22);
      color:#C8FBFF;
      font-size:13px;
    }

    .status::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:#26F6A8;
      box-shadow:0 0 14px rgba(38,246,168,.65);
    }

    .index-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin:20px 0;
    }

    .index-tags span,
    .pill{
      display:inline-flex;
      align-items:center;
      min-height:36px;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.055);
      border:1px solid rgba(132,197,255,.14);
      color:#D8E6F8;
      font-size:14px;
      transition:background .25s ease,border-color .25s ease,transform .25s ease;
    }

    .index-tags span.active,
    .pill.active{
      color:#061425;
      font-weight:750;
      background:linear-gradient(135deg,#2EE8FF,#4D7CFF);
      border-color:transparent;
    }

    .index-tags span:hover,
    .pill:hover{
      transform:translateY(-2px);
      border-color:rgba(46,232,255,.42);
      background:rgba(46,232,255,.08);
    }

    .mini-flow{
      display:grid;
      gap:12px;
      margin-top:18px;
    }

    .flow-row{
      display:grid;
      grid-template-columns:44px 1fr;
      gap:12px;
      align-items:start;
      padding:14px;
      border-radius:18px;
      background:rgba(255,255,255,.045);
      border:1px solid rgba(255,255,255,.07);
    }

    .flow-row b{
      width:36px;
      height:36px;
      display:grid;
      place-items:center;
      border-radius:50%;
      color:#03111D;
      background:linear-gradient(135deg,var(--primary),var(--primary-2));
      box-shadow:0 0 20px rgba(46,232,255,.22);
    }

    .flow-row strong{display:block;font-size:16px}
    .flow-row span{display:block;color:var(--text-muted);font-size:14px;margin-top:3px;line-height:1.6}

    .section{
      padding:92px 0;
    }

    .section-sm{
      padding:72px 0;
    }

    .section-head{
      display:flex;
      justify-content:space-between;
      gap:28px;
      align-items:end;
      margin-bottom:34px;
    }

    .section-kicker{
      color:var(--primary);
      font-size:14px;
      font-weight:760;
      letter-spacing:.08em;
      margin-bottom:8px;
    }

    h2{
      font-size:clamp(28px,3.8vw,40px);
      line-height:1.22;
      letter-spacing:-.02em;
      font-weight:820;
    }

    .section-head p{
      max-width:520px;
      color:var(--text-muted);
      font-size:16px;
    }

    .filter-bar{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      padding:16px;
      border-radius:999px;
      background:rgba(8,18,38,.54);
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      backdrop-filter:blur(14px);
    }

    .filter-bar a{
      min-height:42px;
      padding:8px 16px;
      display:inline-flex;
      align-items:center;
      border-radius:999px;
      border:1px solid rgba(132,197,255,.13);
      color:var(--text-muted);
      background:rgba(255,255,255,.04);
      transition:all .25s ease;
      font-size:15px;
    }

    .filter-bar a:hover{
      color:#fff;
      border-color:rgba(46,232,255,.38);
      background:rgba(46,232,255,.08);
      box-shadow:0 0 22px rgba(46,232,255,.1);
    }

    .filter-bar a.active{
      color:#061425;
      border-color:transparent;
      font-weight:760;
      background:linear-gradient(135deg,#2EE8FF,#4D7CFF 70%,#8B5CFF);
    }

    .guide-layout{
      display:grid;
      grid-template-columns:280px minmax(0,1fr);
      gap:30px;
      align-items:start;
    }

    .toc{
      position:sticky;
      top:112px;
      padding:18px;
      border-radius:var(--radius-md);
      background:var(--bg-panel);
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      backdrop-filter:blur(16px);
    }

    .toc-title{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      padding-bottom:14px;
      margin-bottom:12px;
      border-bottom:1px solid var(--line);
    }

    .toc-title strong{font-size:17px}
    .toc-title span{
      width:34px;
      height:34px;
      display:grid;
      place-items:center;
      border-radius:50%;
      color:var(--primary);
      background:rgba(46,232,255,.08);
      border:1px solid rgba(46,232,255,.18);
    }

    .toc a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      min-height:46px;
      padding:10px 12px;
      border-radius:14px;
      color:var(--text-muted);
      transition:all .25s ease;
      font-size:15px;
    }

    .toc a::after{
      content:"→";
      color:var(--text-faint);
      transition:transform .25s ease,color .25s ease;
    }

    .toc a:hover,
    .toc a.active{
      color:#fff;
      background:rgba(46,232,255,.08);
    }

    .toc a:hover::after,
    .toc a.active::after{
      transform:translateX(3px);
      color:var(--primary);
    }

    .content-stack{
      display:grid;
      gap:28px;
    }

    .content-group{
      scroll-margin-top:118px;
      border-radius:var(--radius-lg);
      background:rgba(12,26,48,.56);
      border:1px solid var(--line);
      box-shadow:0 20px 60px rgba(0,0,0,.24),inset 0 1px 0 rgba(255,255,255,.05);
      overflow:hidden;
    }

    .group-cover{
      min-height:220px;
      position:relative;
      display:flex;
      align-items:end;
      padding:26px;
      background:#08162B;
      overflow:hidden;
    }

    .group-cover img{
      position:absolute;
      inset:0;
      width:100%;
      height:100%;
      object-fit:cover;
      opacity:.5;
    }

    .group-cover::after{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(180deg,transparent 0%,rgba(5,11,22,.88) 88%),
        linear-gradient(90deg,rgba(5,11,22,.86),rgba(5,11,22,.25));
    }

    .group-cover-text{
      position:relative;
      z-index:1;
      max-width:680px;
    }

    .group-cover-text h3{
      font-size:26px;
      line-height:1.25;
      margin:10px 0 8px;
    }

    .group-cover-text p{
      color:#C6D4E8;
      max-width:640px;
      line-height:1.75;
    }

    .group-body{
      padding:24px;
    }

    .group-intro{
      display:grid;
      grid-template-columns:1fr auto;
      gap:18px;
      align-items:center;
      padding:18px;
      border-radius:20px;
      background:rgba(255,255,255,.04);
      border:1px solid rgba(255,255,255,.07);
      margin-bottom:18px;
    }

    .group-intro p{
      color:var(--text-muted);
      max-width:720px;
    }

    .metric{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:10px;
      min-width:300px;
    }

    .metric span{
      display:block;
      padding:12px;
      border-radius:16px;
      background:rgba(46,232,255,.06);
      border:1px solid rgba(46,232,255,.14);
      text-align:center;
      color:#DDFBFF;
      font-size:13px;
    }

    .metric b{
      display:block;
      color:#fff;
      font-size:22px;
      line-height:1.1;
      margin-bottom:4px;
    }

    .cards{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:16px;
    }

    .card{
      position:relative;
      min-height:190px;
      padding:20px;
      border-radius:var(--radius-md);
      background:linear-gradient(180deg,rgba(16,34,62,.74),rgba(10,22,42,.62));
      border:1px solid var(--line);
      box-shadow:0 18px 46px rgba(0,0,0,.22),inset 0 1px 0 rgba(255,255,255,.055);
      transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease,background .25s ease;
      overflow:hidden;
    }

    .card::after{
      content:"";
      position:absolute;
      width:120px;
      height:120px;
      right:-50px;
      top:-50px;
      border-radius:50%;
      background:radial-gradient(circle,rgba(46,232,255,.12),transparent 68%);
      opacity:0;
      transition:opacity .25s ease;
    }

    .card:hover{
      transform:translateY(-4px);
      border-color:rgba(46,232,255,.42);
      box-shadow:0 0 32px rgba(46,232,255,.14),0 22px 54px rgba(0,0,0,.28);
    }

    .card:hover::after{opacity:1}

    .card .tag{
      display:inline-flex;
      align-items:center;
      min-height:30px;
      padding:5px 10px;
      border-radius:999px;
      color:#CFFAFF;
      background:rgba(46,232,255,.08);
      border:1px solid rgba(46,232,255,.18);
      font-size:13px;
      margin-bottom:14px;
    }

    .card h3{
      font-size:20px;
      line-height:1.35;
      margin-bottom:9px;
    }

    .card p{
      color:var(--text-muted);
      font-size:15px;
      line-height:1.75;
    }

    .text-link{
      display:inline-flex;
      align-items:center;
      gap:7px;
      margin-top:18px;
      color:var(--primary);
      font-weight:760;
      transition:gap .25s ease,color .25s ease;
    }

    .text-link::after{
      content:"→";
      transition:transform .25s ease;
    }

    .text-link:hover{
      gap:11px;
      color:#9CF7FF;
    }

    .ops-panel{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:18px;
      margin-top:18px;
    }

    .ops-box{
      padding:20px;
      border-radius:var(--radius-md);
      background:rgba(255,255,255,.04);
      border:1px solid rgba(132,197,255,.14);
    }

    .ops-box h3{
      font-size:20px;
      margin-bottom:12px;
    }

    .ops-list{
      display:grid;
      gap:10px;
      list-style:none;
    }

    .ops-list li{
      display:grid;
      grid-template-columns:30px 1fr;
      gap:10px;
      align-items:start;
      color:var(--text-muted);
      font-size:15px;
    }

    .ops-list b{
      width:28px;
      height:28px;
      display:grid;
      place-items:center;
      border-radius:50%;
      color:#061425;
      background:linear-gradient(135deg,var(--primary),var(--primary-2));
      font-size:13px;
    }

    .notice-strip{
      margin-top:18px;
      padding:16px 18px;
      border-radius:18px;
      background:linear-gradient(90deg,rgba(255,61,110,.08),rgba(46,232,255,.065));
      border:1px solid rgba(255,255,255,.09);
      color:#DDE8F8;
      font-size:15px;
    }

    .notice-strip strong{color:#fff}

    .faq-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:16px;
    }

    details{
      border-radius:var(--radius-md);
      background:rgba(12,26,48,.62);
      border:1px solid var(--line);
      box-shadow:0 18px 48px rgba(0,0,0,.22);
      overflow:hidden;
      transition:border-color .25s ease,box-shadow .25s ease;
    }

    details[open]{
      border-color:rgba(46,232,255,.32);
      box-shadow:0 0 28px rgba(46,232,255,.1),0 18px 48px rgba(0,0,0,.25);
    }

    summary{
      list-style:none;
      cursor:pointer;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:18px 20px;
      font-weight:760;
      color:#fff;
    }

    summary::-webkit-details-marker{display:none}

    summary::after{
      content:"+";
      width:28px;
      height:28px;
      display:grid;
      place-items:center;
      border-radius:50%;
      color:var(--primary);
      background:rgba(46,232,255,.08);
      border:1px solid rgba(46,232,255,.16);
      flex:0 0 auto;
    }

    details[open] summary::after{content:"−"}

    details p{
      padding:0 20px 20px;
      color:var(--text-muted);
      font-size:15px;
      line-height:1.75;
    }

    .cta{
      padding:38px;
      border-radius:32px;
      background:
        radial-gradient(circle at 18% 18%,rgba(46,232,255,.18),transparent 34%),
        radial-gradient(circle at 84% 18%,rgba(139,92,255,.18),transparent 32%),
        linear-gradient(135deg,rgba(16,34,62,.82),rgba(8,18,38,.72));
      border:1px solid rgba(132,197,255,.22);
      box-shadow:var(--shadow),var(--shadow-glow);
      overflow:hidden;
    }

    .cta-inner{
      display:grid;
      grid-template-columns:1fr auto;
      gap:26px;
      align-items:center;
    }

    .cta p{
      max-width:720px;
      color:var(--text-muted);
      margin-top:12px;
    }

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

    .footer{
      padding:64px 0 34px;
      background:
        radial-gradient(circle at 18% 0%,rgba(46,232,255,.08),transparent 32%),
        linear-gradient(180deg,rgba(3,8,16,.2),rgba(3,8,16,.92));
      border-top:1px solid rgba(132,197,255,.14);
    }

    .footer-shell{
      border-radius:30px;
      padding:28px;
      background:rgba(7,15,29,.64);
      border:1px solid rgba(132,197,255,.14);
      box-shadow:0 20px 60px rgba(0,0,0,.28);
    }

    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .75fr 1fr;
      gap:28px;
      align-items:start;
    }

    .footer p{
      color:var(--text-muted);
      max-width:520px;
      font-size:15px;
    }

    .footer h3{
      font-size:16px;
      margin-bottom:14px;
      color:#fff;
    }

    .footer-links{
      display:grid;
      gap:10px;
    }

    .footer-links a{
      color:var(--text-muted);
      transition:color .25s ease,transform .25s ease;
      width:max-content;
    }

    .footer-links a:hover{
      color:var(--primary);
      transform:translateX(3px);
    }

    .footer-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }

    .footer-tag{
      display:inline-flex;
      align-items:center;
      min-height:32px;
      padding:5px 10px;
      border-radius:999px;
      background:rgba(255,255,255,.045);
      border:1px solid rgba(132,197,255,.12);
      color:#D7E7FA;
      font-size:13px;
    }

    .footer-meta{
      display:flex;
      justify-content:space-between;
      gap:18px;
      flex-wrap:wrap;
      margin-top:28px;
      padding-top:20px;
      border-top:1px solid rgba(132,197,255,.12);
      color:var(--text-faint);
      font-size:13px;
    }

    @media (max-width:1060px){
      .nav-shell{border-radius:30px}
      .nav-actions .btn{display:none}
      .hero-grid{grid-template-columns:1fr;gap:30px}
      .index-panel{max-width:720px}
      .section-head{align-items:start;flex-direction:column}
      .guide-layout{grid-template-columns:1fr}
      .toc{
        position:relative;
        top:0;
        display:flex;
        overflow-x:auto;
        gap:8px;
        padding:12px;
        border-radius:22px;
        scrollbar-width:none;
      }
      .toc::-webkit-scrollbar{display:none}
      .toc-title{display:none}
      .toc a{min-width:max-content}
      .toc a::after{display:none}
      .group-intro{grid-template-columns:1fr}
      .metric{min-width:0}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-grid > div:first-child{grid-column:1/-1}
    }

    @media (max-width:820px){
      .site-header{top:12px}
      .nav-shell{
        width:calc(100% - 24px);
        min-height:64px;
        padding:10px 12px;
      }
      .logo-text strong{font-size:16px}
      .logo-text span{font-size:11px}
      .logo-mark{width:34px;height:34px}
      .menu-toggle{display:flex}
      .nav-links{
        position:absolute;
        top:78px;
        left:12px;
        right:12px;
        display:grid;
        grid-template-columns:1fr;
        gap:8px;
        padding:12px;
        border-radius:24px;
        background:rgba(8,18,38,.92);
        border:1px solid rgba(132,197,255,.22);
        box-shadow:0 24px 70px rgba(0,0,0,.42);
        backdrop-filter:blur(18px) saturate(140%);
        opacity:0;
        visibility:hidden;
        transform:translateY(-8px);
        transition:opacity .25s ease,visibility .25s ease,transform .25s ease;
      }
      .nav-links.is-open{
        opacity:1;
        visibility:visible;
        transform:translateY(0);
      }
      .nav-links a{justify-content:flex-start;padding:0 16px}
      .hero{padding:130px 0 58px;min-height:auto}
      .hero-lead{font-size:16px}
      .section{padding:68px 0}
      .section-sm{padding:56px 0}
      .filter-bar{border-radius:24px}
      .cards,.ops-panel,.faq-grid{grid-template-columns:1fr}
      .metric{grid-template-columns:1fr}
      .cta-inner{grid-template-columns:1fr}
      .cta-actions{justify-content:flex-start}
      .footer-grid{grid-template-columns:1fr}
    }

    @media (max-width:540px){
      .container{width:min(calc(100% - 28px),var(--container))}
      h1{font-size:34px}
      h2{font-size:27px}
      .hero-actions,.cta-actions{display:grid;grid-template-columns:1fr}
      .btn{width:100%;min-height:48px}
      .index-panel,.cta{padding:22px;border-radius:24px}
      .panel-top{align-items:flex-start;flex-direction:column}
      .group-cover{min-height:190px;padding:20px}
      .group-cover-text h3{font-size:22px}
      .group-body{padding:18px}
      .filter-bar a{width:100%;justify-content:center}
      .footer-shell{padding:22px;border-radius:24px}
      .footer-meta{font-size:12px}
    }