/* roulang page: index */
:root{
      --primary:#2563EB;
      --primary-dark:#1D4ED8;
      --primary-soft:#EFF6FF;
      --secondary:#38BDF8;
      --accent:#7C3AED;
      --accent-soft:#F3E8FF;
      --warning:#F59E0B;
      --bg:#F6F9FF;
      --bg-2:#EEF5FF;
      --surface:#FFFFFF;
      --text:#111827;
      --muted:#667085;
      --muted-2:#94A3B8;
      --border:#E5EAF3;
      --border-strong:#D8E2F0;
      --success:#10B981;
      --radius-sm:12px;
      --radius-md:18px;
      --radius-lg:24px;
      --radius-xl:32px;
      --shadow:0 10px 30px rgba(15,23,42,.06);
      --shadow-hover:0 16px 42px rgba(37,99,235,.14);
      --shadow-blue:0 18px 48px rgba(37,99,235,.18);
      --container:1200px;
      --font:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font);
      color:var(--text);
      background:
        radial-gradient(circle at 8% 8%, rgba(56,189,248,.16), transparent 28%),
        radial-gradient(circle at 88% 3%, rgba(124,58,237,.10), transparent 30%),
        linear-gradient(180deg,#F9FBFF 0%,#F6F9FF 48%,#FFFFFF 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    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(37,99,235,.18);color:var(--text)}
    .container{width:min(var(--container),calc(100% - 64px));margin:0 auto}
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.82);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(229,234,243,.82);
      transition:box-shadow .22s ease,background .22s ease;
    }
    .site-header.is-scrolled{background:rgba(255,255,255,.96);box-shadow:0 10px 28px rgba(15,23,42,.06)}
    .nav{
      height:78px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:22px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:11px;
      min-width:max-content;
      font-weight:800;
      letter-spacing:-.02em;
    }
    .brand-mark{
      width:38px;
      height:38px;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      box-shadow:0 12px 24px rgba(37,99,235,.22);
      position:relative;
      overflow:hidden;
    }
    .brand-mark:after{
      content:"";
      position:absolute;
      width:16px;
      height:16px;
      border-radius:50%;
      background:rgba(255,255,255,.34);
      right:-4px;
      top:-4px;
    }
    .brand-name{font-size:18px;line-height:1.25;max-width:260px}
    .nav-links{
      display:flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      flex:1;
    }
    .nav-link{
      padding:9px 14px;
      border-radius:999px;
      color:#334155;
      font-size:14px;
      font-weight:650;
      transition:background .2s ease,color .2s ease,transform .2s ease;
      white-space:nowrap;
    }
    .nav-link:hover,.nav-link:focus-visible{background:var(--primary-soft);color:var(--primary)}
    .nav-link.active{background:#DBEAFE;color:var(--primary)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .search{
      width:248px;
      height:42px;
      display:flex;
      align-items:center;
      gap:8px;
      padding:0 14px;
      border:1px solid var(--border);
      border-radius:999px;
      background:#fff;
      color:var(--muted);
      box-shadow:0 6px 18px rgba(15,23,42,.04);
      transition:border .2s ease,box-shadow .2s ease;
    }
    .search input{
      width:100%;
      border:0;
      outline:0;
      color:var(--text);
      background:transparent;
      font-size:14px;
    }
    .search:focus-within{border-color:rgba(37,99,235,.55);box-shadow:0 0 0 4px rgba(37,99,235,.10)}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:44px;
      padding:11px 18px;
      border-radius:999px;
      font-weight:700;
      font-size:14px;
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
      user-select:none;
      white-space:nowrap;
    }
    .btn:hover{transform:translateY(-1px)}
    .btn:active{transform:scale(.98)}
    .btn:focus-visible,.nav-link:focus-visible,.faq-question:focus-visible,.menu-toggle:focus-visible,.tag:focus-visible,input:focus-visible{
      outline:3px solid rgba(37,99,235,.22);
      outline-offset:2px;
    }
    .btn-primary{background:var(--primary);color:#fff;box-shadow:0 12px 26px rgba(37,99,235,.22)}
    .btn-primary:hover{background:var(--primary-dark);box-shadow:var(--shadow-blue)}
    .btn-secondary{background:#fff;color:var(--primary);border:1px solid #BFDBFE}
    .btn-secondary:hover{background:#EFF6FF;border-color:#93C5FD}
    .btn-ghost{background:#fff;color:#1F2937;border:1px solid var(--border)}
    .btn-ghost:hover{background:#F8FBFF;border-color:#CBD5E1}
    .menu-toggle{display:none;width:44px;height:44px;border-radius:14px;background:#fff;border:1px solid var(--border);color:var(--text)}
    .hero{
      position:relative;
      padding:76px 0 58px;
      overflow:hidden;
    }
    .hero:before{
      content:"";
      position:absolute;
      inset:28px auto auto 50%;
      width:780px;
      height:420px;
      transform:translateX(-10%);
      background:
        linear-gradient(rgba(37,99,235,.06) 1px, transparent 1px),
        linear-gradient(90deg,rgba(37,99,235,.06) 1px, transparent 1px);
      background-size:28px 28px;
      mask-image:radial-gradient(circle, #000 0%, transparent 68%);
      pointer-events:none;
    }
    .hero-grid{
      position:relative;
      display:grid;
      grid-template-columns:minmax(0,1.05fr) minmax(420px,.95fr);
      gap:46px;
      align-items:center;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--border);
      color:var(--primary);
      font-weight:800;
      font-size:13px;
      box-shadow:var(--shadow);
    }
    h1,h2,h3,p{margin-top:0}
    h1{
      margin:20px 0 18px;
      max-width:720px;
      font-size:clamp(32px,5vw,54px);
      line-height:1.12;
      letter-spacing:-.04em;
      font-weight:850;
    }
    .hero-sub{
      max-width:690px;
      color:var(--muted);
      font-size:17px;
      line-height:1.9;
      margin-bottom:26px;
    }
    .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:24px}
    .trust-row{display:flex;gap:12px;flex-wrap:wrap}
    .trust-item{
      display:flex;
      align-items:center;
      gap:8px;
      padding:10px 13px;
      border:1px solid var(--border);
      border-radius:999px;
      background:rgba(255,255,255,.78);
      color:#475569;
      font-weight:700;
      font-size:13px;
    }
    .dot{
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--success);
      box-shadow:0 0 0 5px rgba(16,185,129,.12);
    }
    .preview-panel{
      border:1px solid rgba(226,232,240,.95);
      border-radius:var(--radius-xl);
      background:rgba(255,255,255,.76);
      box-shadow:0 24px 70px rgba(15,23,42,.10);
      padding:20px;
      backdrop-filter:blur(16px);
    }
    .panel-top{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:12px;
      margin-bottom:14px;
    }
    .panel-title{font-size:15px;font-weight:800}
    .badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:6px 10px;
      border-radius:999px;
      font-size:12px;
      font-weight:800;
    }
    .badge-vip{background:var(--accent-soft);color:var(--accent)}
    .badge-hot{background:#FFF7ED;color:#EA580C}
    .badge-blue{background:#DBEAFE;color:var(--primary)}
    .cover-large{
      height:238px;
      border-radius:26px;
      position:relative;
      overflow:hidden;
      background:
        radial-gradient(circle at 25% 28%, rgba(255,255,255,.65), transparent 13%),
        radial-gradient(circle at 78% 18%, rgba(56,189,248,.55), transparent 18%),
        radial-gradient(circle at 58% 82%, rgba(124,58,237,.35), transparent 24%),
        linear-gradient(135deg,#1E40AF,#60A5FA 48%,#E0F2FE);
    }
    .cover-large:before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(120deg,rgba(255,255,255,.16),transparent 34%,rgba(255,255,255,.22));
      backdrop-filter:blur(1px);
    }
    .lock-chip{
      position:absolute;
      top:14px;
      right:14px;
      z-index:2;
      padding:8px 11px;
      border-radius:999px;
      background:rgba(15,23,42,.64);
      color:#fff;
      font-size:12px;
      font-weight:800;
      backdrop-filter:blur(10px);
    }
    .cover-info{
      position:absolute;
      left:16px;
      right:16px;
      bottom:16px;
      z-index:2;
      padding:14px;
      border-radius:18px;
      background:rgba(255,255,255,.80);
      backdrop-filter:blur(12px);
      border:1px solid rgba(255,255,255,.72);
    }
    .cover-info strong{display:block;font-size:16px;margin-bottom:5px}
    .cover-info span{font-size:13px;color:#475569}
    .metric-stack{display:grid;gap:12px;margin-top:14px}
    .metric-line{
      display:grid;
      grid-template-columns:86px 1fr 42px;
      align-items:center;
      gap:10px;
      padding:12px;
      border-radius:18px;
      background:#F8FBFF;
      border:1px solid var(--border);
      font-size:13px;
      color:#475569;
      font-weight:700;
    }
    .bar{height:8px;border-radius:999px;background:#E2E8F0;overflow:hidden}
    .bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--secondary))}
    .section{padding:78px 0}
    .section-head{
      display:flex;
      justify-content:space-between;
      align-items:end;
      gap:24px;
      margin-bottom:30px;
    }
    .section-kicker{color:var(--primary);font-size:13px;font-weight:850;margin-bottom:8px}
    h2{
      font-size:clamp(25px,3vw,38px);
      line-height:1.2;
      letter-spacing:-.025em;
      margin-bottom:10px;
      font-weight:850;
    }
    .section-desc{color:var(--muted);max-width:680px;margin:0;line-height:1.85}
    .quick-channel{
      padding:0 0 42px;
    }
    .channel-strip{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      padding:18px;
      background:#fff;
      border:1px solid var(--border);
      border-radius:24px;
      box-shadow:var(--shadow);
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:10px 14px;
      border-radius:999px;
      background:#F1F7FF;
      color:#33557C;
      font-size:13px;
      font-weight:800;
      transition:background .2s ease,color .2s ease,transform .2s ease;
    }
    .tag:hover{background:#DBEAFE;color:var(--primary);transform:translateY(-1px)}
    .benefit-matrix{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:20px;
      align-items:stretch;
    }
    .plan-card{
      position:relative;
      background:#fff;
      border:1px solid var(--border);
      border-radius:24px;
      padding:24px;
      box-shadow:var(--shadow);
      transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
    }
    .plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
    .plan-card.recommend{
      border:2px solid rgba(37,99,235,.42);
      background:linear-gradient(180deg,#EFF6FF 0%,#FFFFFF 40%);
    }
    .recommend-label{
      position:absolute;
      top:-14px;
      left:24px;
      background:var(--primary);
      color:#fff;
      padding:6px 12px;
      border-radius:999px;
      font-size:12px;
      font-weight:850;
      box-shadow:0 10px 18px rgba(37,99,235,.22);
    }
    .plan-card h3{font-size:21px;margin-bottom:6px}
    .plan-card .plan-note{color:var(--muted);font-size:14px;margin-bottom:18px}
    .feature-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
    .feature-list li{
      display:flex;
      align-items:flex-start;
      gap:10px;
      color:#475569;
      font-size:14px;
      line-height:1.55;
    }
    .check{
      width:20px;
      height:20px;
      flex:0 0 20px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:#DBEAFE;
      color:var(--primary);
      font-size:12px;
      font-weight:900;
      margin-top:1px;
    }
    .muted-check{background:#F1F5F9;color:#94A3B8}
    .highlight-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      grid-template-areas:
        "wide side1"
        "wide side2"
        "accent accent";
      gap:22px;
    }
    .highlight-card{
      background:#fff;
      border:1px solid var(--border);
      border-radius:24px;
      padding:26px;
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
      transition:transform .2s ease,box-shadow .2s ease;
    }
    .highlight-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
    .highlight-card.wide{grid-area:wide;min-height:330px;background:linear-gradient(135deg,#FFFFFF 0%,#EEF6FF 100%)}
    .highlight-card.side1{grid-area:side1}
    .highlight-card.side2{grid-area:side2}
    .highlight-card.accent{
      grid-area:accent;
      display:grid;
      grid-template-columns:1fr auto;
      align-items:center;
      gap:22px;
      background:linear-gradient(135deg,#EEF6FF,#FFFFFF 58%,#F3E8FF);
    }
    .icon-bubble{
      width:52px;
      height:52px;
      border-radius:18px;
      display:grid;
      place-items:center;
      background:#DBEAFE;
      color:var(--primary);
      font-size:22px;
      margin-bottom:18px;
    }
    .highlight-card h3{font-size:22px;margin-bottom:12px}
    .mini-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .mini-point{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--border);font-size:13px;color:#475569;font-weight:750}
    .preview-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:22px;
    }
    .content-card{
      background:#fff;
      border:1px solid var(--border);
      border-radius:22px;
      padding:12px;
      box-shadow:var(--shadow);
      overflow:hidden;
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    }
    .content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#BFDBFE}
    .thumb{
      height:150px;
      border-radius:18px;
      position:relative;
      overflow:hidden;
      background:linear-gradient(135deg,#DBEAFE,#93C5FD,#F3E8FF);
    }
    .thumb:before{
      content:"";
      position:absolute;
      inset:-25%;
      background:
        radial-gradient(circle at 30% 35%,rgba(255,255,255,.82),transparent 12%),
        radial-gradient(circle at 72% 24%,rgba(124,58,237,.25),transparent 18%),
        radial-gradient(circle at 58% 76%,rgba(37,99,235,.28),transparent 24%);
      filter:blur(8px);
      transform:scale(1);
      transition:transform .3s ease;
    }
    .content-card:hover .thumb:before{transform:scale(1.08)}
    .thumb .badge{position:absolute;left:10px;top:10px;z-index:2}
    .thumb .lock-chip{top:auto;right:10px;bottom:10px;padding:6px 9px}
    .content-body{padding:14px 4px 4px}
    .content-body h3{font-size:16px;line-height:1.45;margin-bottom:8px}
    .content-meta{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:8px;
      color:var(--muted);
      font-size:12px;
      font-weight:700;
    }
    .category-guides{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:24px;
    }
    .guide-card{
      display:grid;
      grid-template-columns:1fr 150px;
      gap:22px;
      align-items:center;
      min-height:220px;
      padding:26px;
      border-radius:28px;
      border:1px solid var(--border);
      background:#fff;
      box-shadow:var(--shadow);
      transition:transform .22s ease,box-shadow .22s ease;
      overflow:hidden;
    }
    .guide-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
    .guide-card h3{font-size:23px;margin-bottom:9px}
    .guide-card p{color:var(--muted);margin-bottom:16px}
    .guide-art{
      height:150px;
      border-radius:24px;
      background:
        linear-gradient(135deg,rgba(37,99,235,.18),rgba(56,189,248,.18)),
        repeating-linear-gradient(135deg,rgba(37,99,235,.12) 0 8px,transparent 8px 16px);
      position:relative;
    }
    .guide-art:after{
      content:"";
      position:absolute;
      width:86px;
      height:86px;
      border-radius:28px;
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      right:18px;
      bottom:18px;
      box-shadow:0 16px 28px rgba(37,99,235,.22);
    }
    .proof-band{
      background:#0F172A;
      color:#E5EEF9;
      border-radius:32px;
      padding:32px;
      display:grid;
      grid-template-columns:1fr repeat(3,150px);
      gap:20px;
      align-items:center;
      box-shadow:0 24px 60px rgba(15,23,42,.16);
    }
    .proof-band h2{color:#fff;margin-bottom:8px}
    .proof-band p{color:#B7C4D6;margin-bottom:0}
    .proof-num{
      padding:18px;
      border-radius:20px;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.12);
      text-align:center;
    }
    .proof-num strong{display:block;font-size:28px;color:#fff;line-height:1.1}
    .proof-num span{font-size:13px;color:#B7C4D6}
    .faq-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;align-items:start}
    .faq-list{display:grid;gap:14px}
    .faq-item{
      background:#fff;
      border:1px solid var(--border);
      border-radius:20px;
      box-shadow:var(--shadow);
      overflow:hidden;
      transition:border-color .2s ease,background .2s ease;
    }
    .faq-item.is-open{background:#F8FBFF;border-color:#BFDBFE}
    .faq-question{
      width:100%;
      min-height:58px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:18px 20px;
      background:transparent;
      color:var(--text);
      font-weight:850;
      text-align:left;
    }
    .faq-icon{
      width:28px;
      height:28px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:#EEF5FF;
      color:var(--primary);
      flex:0 0 28px;
      transition:transform .2s ease;
    }
    .faq-item.is-open .faq-icon{transform:rotate(45deg)}
    .faq-answer{
      display:none;
      padding:0 20px 20px;
      color:var(--muted);
      font-size:15px;
      line-height:1.8;
    }
    .faq-item.is-open .faq-answer{display:block}
    .cta{
      padding:0 0 86px;
    }
    .cta-box{
      position:relative;
      overflow:hidden;
      border-radius:34px;
      padding:48px;
      background:
        radial-gradient(circle at 18% 18%,rgba(56,189,248,.26),transparent 24%),
        radial-gradient(circle at 88% 25%,rgba(124,58,237,.16),transparent 24%),
        linear-gradient(135deg,#EEF6FF,#FFFFFF);
      border:1px solid var(--border);
      box-shadow:var(--shadow-blue);
      display:grid;
      grid-template-columns:1fr auto;
      gap:30px;
      align-items:center;
    }
    .cta-box h2{margin-bottom:12px}
    .cta-box p{margin-bottom:0;color:var(--muted);max-width:720px}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .site-footer{
      background:#F3F7FE;
      border-top:1px solid var(--border);
      padding:46px 0 24px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr .8fr .8fr;
      gap:32px;
      margin-bottom:28px;
    }
    .footer-brand{display:flex;align-items:center;gap:11px;font-weight:850;margin-bottom:14px}
    .footer-text{color:var(--muted);max-width:520px;font-size:14px;margin:0}
    .footer-col h3{font-size:15px;margin-bottom:12px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{
      color:#526072;
      font-size:14px;
      transition:color .2s ease,transform .2s ease;
    }
    .footer-links a:hover{color:var(--primary);transform:translateX(2px)}
    .copyright{
      border-top:1px solid var(--border);
      padding-top:18px;
      color:#7B8798;
      font-size:13px;
      display:flex;
      justify-content:space-between;
      gap:18px;
      flex-wrap:wrap;
    }
    @media (max-width:1080px){
      .container{width:min(960px,calc(100% - 48px))}
      .brand-name{max-width:210px;font-size:16px}
      .search{width:190px}
      .hero-grid{grid-template-columns:1fr;gap:34px}
      .preview-panel{max-width:720px}
      .preview-grid{grid-template-columns:repeat(3,1fr)}
      .proof-band{grid-template-columns:1fr 1fr}
      .faq-wrap{grid-template-columns:1fr}
    }
    @media (max-width:860px){
      .nav{height:70px}
      .menu-toggle{display:grid;place-items:center}
      .nav-links{
        position:absolute;
        left:24px;
        right:24px;
        top:78px;
        display:none;
        flex-direction:column;
        align-items:stretch;
        padding:14px;
        background:#fff;
        border:1px solid var(--border);
        border-radius:22px;
        box-shadow:var(--shadow-hover);
      }
      .nav-links.is-open{display:flex}
      .nav-link{width:100%;text-align:center}
      .nav-actions .search{display:none}
      .nav-actions .btn-ghost{display:none}
      .benefit-matrix{grid-template-columns:1fr}
      .highlight-grid{
        grid-template-columns:1fr;
        grid-template-areas:"wide" "side1" "side2" "accent";
      }
      .highlight-card.accent{grid-template-columns:1fr}
      .preview-grid{grid-template-columns:repeat(2,1fr)}
      .category-guides{grid-template-columns:1fr}
      .cta-box{grid-template-columns:1fr;padding:34px}
      .cta-actions{justify-content:flex-start}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:620px){
      .container{width:calc(100% - 32px)}
      .hero{padding:48px 0 36px}
      .section{padding:56px 0}
      .brand-name{max-width:175px;font-size:15px}
      .nav-actions .btn-primary{display:none}
      .hero-actions .btn{width:100%}
      .trust-row{display:grid;grid-template-columns:1fr;width:100%}
      .preview-panel{padding:14px;border-radius:24px}
      .cover-large{height:210px;border-radius:22px}
      .metric-line{grid-template-columns:74px 1fr 36px}
      .section-head{display:block}
      .preview-grid{grid-template-columns:1fr}
      .guide-card{grid-template-columns:1fr}
      .guide-art{height:120px}
      .proof-band{grid-template-columns:1fr;padding:24px;border-radius:26px}
      .faq-question{min-height:64px;padding:18px}
      .cta-box{padding:28px 20px;border-radius:26px;text-align:center}
      .cta-actions{justify-content:center}
      .cta-actions .btn{width:100%}
      .footer-grid{grid-template-columns:1fr}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }
    @media (max-width:420px){
      .container{width:calc(100% - 28px)}
      h1{font-size:31px}
      .brand-mark{width:34px;height:34px;border-radius:12px}
      .brand-name{max-width:150px}
      .channel-strip{padding:14px}
      .tag{width:100%;justify-content:center}
      .plan-card,.highlight-card{border-radius:18px;padding:20px}
      .content-card{border-radius:18px}
      .thumb{height:136px}
    }

/* roulang page: category1 */
:root{
      --primary:#2563EB;
      --primary-dark:#1D4ED8;
      --primary-soft:#EFF6FF;
      --cyan:#38BDF8;
      --purple:#7C3AED;
      --purple-soft:#F3E8FF;
      --warning:#F59E0B;
      --bg:#F6F9FF;
      --bg-soft:#EEF5FF;
      --surface:#FFFFFF;
      --surface-2:#F8FBFF;
      --text:#111827;
      --muted:#667085;
      --muted-2:#94A3B8;
      --border:#E5EAF3;
      --border-strong:#D8E2F0;
      --shadow:0 10px 30px rgba(15,23,42,.06);
      --shadow-hover:0 16px 42px rgba(37,99,235,.14);
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:28px;
      --container:1200px;
      --header-h:76px;
      --ease:all .22s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 0%, rgba(56,189,248,.16), transparent 28%),
        radial-gradient(circle at 92% 8%, rgba(124,58,237,.10), transparent 30%),
        linear-gradient(180deg,#fff 0%,var(--bg) 42%,#fff 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    button{cursor:pointer}
    img,svg{max-width:100%;display:block}
    ::selection{background:rgba(37,99,235,.16)}
    .container{width:min(var(--container),calc(100% - 64px));margin:0 auto}
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.82);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(229,234,243,.82);
      transition:var(--ease);
    }
    .site-header.is-scrolled{background:rgba(255,255,255,.96);box-shadow:0 10px 28px rgba(15,23,42,.07)}
    .nav{height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:22px}
    .brand{display:inline-flex;align-items:center;gap:10px;min-width:0}
    .brand-mark{
      width:36px;height:36px;border-radius:14px;
      display:inline-flex;align-items:center;justify-content:center;
      color:#fff;font-size:15px;font-weight:800;
      background:linear-gradient(135deg,var(--primary),var(--cyan));
      box-shadow:0 10px 22px rgba(37,99,235,.22);
      flex:0 0 auto;
    }
    .brand-name{
      font-size:19px;
      font-weight:800;
      letter-spacing:-.02em;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
      max-width:290px;
    }
    .nav-links{display:flex;align-items:center;gap:8px;flex:1;justify-content:center}
    .nav-link{
      display:inline-flex;
      align-items:center;
      height:40px;
      padding:0 14px;
      border-radius:999px;
      color:#475467;
      font-size:14px;
      font-weight:700;
      transition:var(--ease);
      outline:none;
    }
    .nav-link:hover,.nav-link:focus-visible{background:var(--primary-soft);color:var(--primary)}
    .nav-link.active{background:linear-gradient(180deg,#EFF6FF,#EAF3FF);color:var(--primary);box-shadow:inset 0 0 0 1px rgba(37,99,235,.08)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .search{
      width:248px;height:42px;border:1px solid var(--border);
      border-radius:999px;background:#fff;display:flex;align-items:center;gap:8px;
      padding:0 14px;color:var(--muted);transition:var(--ease);
    }
    .search:focus-within{border-color:rgba(37,99,235,.72);box-shadow:0 0 0 4px rgba(37,99,235,.10)}
    .search input{border:0;outline:0;width:100%;min-width:0;color:var(--text);background:transparent;font-size:14px}
    .search input::placeholder{color:#98A2B3}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:42px;padding:0 18px;border-radius:999px;
      font-size:14px;font-weight:800;border:1px solid transparent;
      transition:var(--ease);white-space:nowrap;outline:none;
    }
    .btn:hover{transform:translateY(-1px)}
    .btn:active{transform:scale(.98)}
    .btn:focus-visible,.menu-toggle:focus-visible,.filter-chip:focus-visible,.sort-btn:focus-visible,.faq-question:focus-visible{box-shadow:0 0 0 4px rgba(37,99,235,.16)}
    .btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 22px rgba(37,99,235,.20)}
    .btn-primary:hover{background:var(--primary-dark)}
    .btn-ghost{background:#fff;border-color:var(--border);color:#344054}
    .btn-ghost:hover{background:var(--primary-soft);border-color:#BFDBFE;color:var(--primary)}
    .btn-soft{background:var(--primary-soft);color:var(--primary);border-color:#DBEAFE}
    .btn-soft:hover{background:#DBEAFE}
    .menu-toggle{
      display:none;width:42px;height:42px;border-radius:999px;border:1px solid var(--border);
      background:#fff;color:var(--text);font-weight:800;transition:var(--ease)
    }
    main{overflow:hidden}
    .section{padding:86px 0}
    .section-tight{padding:64px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;
      background:rgba(37,99,235,.08);color:var(--primary);
      font-size:13px;font-weight:800;margin-bottom:16px;
    }
    .hero{padding:62px 0 52px;position:relative}
    .hero:before{
      content:"";position:absolute;inset:28px auto auto 50%;width:620px;height:260px;
      transform:translateX(-8%);border-radius:999px;
      background:linear-gradient(90deg,rgba(37,99,235,.12),rgba(56,189,248,.10),rgba(124,58,237,.08));
      filter:blur(44px);pointer-events:none;
    }
    .hero-grid{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:36px;align-items:center}
    h1,h2,h3,p{margin-top:0}
    h1{
      font-size:clamp(32px,4.5vw,54px);
      line-height:1.16;
      letter-spacing:-.045em;
      margin-bottom:18px;
      font-weight:850;
    }
    .hero-sub{
      color:var(--muted);
      font-size:17px;
      max-width:680px;
      margin-bottom:26px;
    }
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px}
    .trust-row{display:flex;flex-wrap:wrap;gap:10px}
    .trust-item{
      display:inline-flex;align-items:center;gap:8px;
      padding:9px 12px;border:1px solid var(--border);
      background:rgba(255,255,255,.78);
      border-radius:999px;color:#475467;font-size:13px;font-weight:700;
    }
    .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(56,189,248,.14)}
    .preview-panel{
      background:rgba(255,255,255,.86);
      border:1px solid rgba(229,234,243,.92);
      border-radius:32px;
      box-shadow:0 24px 64px rgba(15,23,42,.10);
      padding:18px;
      position:relative;
      overflow:hidden;
    }
    .preview-panel:after{
      content:"";position:absolute;right:-80px;top:-90px;width:220px;height:220px;
      background:rgba(37,99,235,.10);border-radius:50%;filter:blur(12px)
    }
    .panel-top{position:relative;border-radius:24px;overflow:hidden;min-height:238px;background:linear-gradient(135deg,#DCEBFF,#F2F7FF 42%,#EDE9FE)}
    .abstract-cover{position:absolute;inset:0;overflow:hidden}
    .abstract-cover span{position:absolute;border-radius:999px;filter:blur(2px);opacity:.72}
    .abstract-cover span:nth-child(1){width:210px;height:210px;background:rgba(37,99,235,.34);left:-46px;top:24px}
    .abstract-cover span:nth-child(2){width:180px;height:180px;background:rgba(56,189,248,.38);right:32px;top:-46px}
    .abstract-cover span:nth-child(3){width:160px;height:160px;background:rgba(124,58,237,.22);right:42px;bottom:-48px}
    .panel-overlay{position:absolute;inset:auto 16px 16px 16px;background:rgba(255,255,255,.78);backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.82);border-radius:20px;padding:14px}
    .panel-title{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px}
    .panel-title strong{font-size:16px}
    .badge{
      display:inline-flex;align-items:center;gap:6px;
      padding:5px 9px;border-radius:999px;font-size:12px;font-weight:800;
      background:var(--primary-soft);color:var(--primary);white-space:nowrap
    }
    .badge.vip{background:var(--purple-soft);color:var(--purple)}
    .badge.hot{background:#FFF7ED;color:#EA580C}
    .progress{height:9px;border-radius:999px;background:#E8EEF7;overflow:hidden}
    .progress span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--primary),var(--cyan));width:76%}
    .mini-list{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}
    .mini-stat{background:#fff;border:1px solid var(--border);border-radius:16px;padding:12px}
    .mini-stat b{display:block;font-size:19px;line-height:1.1}
    .mini-stat span{color:var(--muted);font-size:12px}
    .filter-section{padding:0 0 34px}
    .filter-bar{
      display:grid;grid-template-columns:minmax(220px,1fr) auto auto;
      gap:14px;align-items:center;background:#fff;border:1px solid var(--border);
      border-radius:24px;padding:14px;box-shadow:var(--shadow)
    }
    .filter-search{
      height:50px;border-radius:16px;border:1px solid var(--border);
      display:flex;align-items:center;gap:10px;padding:0 15px;background:var(--surface-2);
      transition:var(--ease);color:var(--muted)
    }
    .filter-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.10);background:#fff}
    .filter-search input{border:0;outline:0;background:transparent;width:100%;min-width:0}
    .chip-row{display:flex;gap:8px;flex-wrap:wrap}
    .filter-chip,.sort-btn{
      border:1px solid var(--border);background:#fff;color:#475467;
      border-radius:999px;min-height:38px;padding:0 13px;
      font-size:13px;font-weight:800;transition:var(--ease);outline:none;
    }
    .filter-chip:hover,.sort-btn:hover{background:var(--primary-soft);color:var(--primary);border-color:#BFDBFE}
    .filter-chip.active,.sort-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
    .result-count{font-size:13px;color:var(--muted);font-weight:700;white-space:nowrap}
    .category-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:28px;align-items:start}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px}
    .section-head h2{font-size:clamp(25px,3.2vw,36px);line-height:1.22;letter-spacing:-.035em;margin-bottom:8px}
    .section-head p{color:var(--muted);max-width:650px;margin-bottom:0}
    .cards-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
    .content-card{
      position:relative;background:#fff;border:1px solid var(--border);border-radius:24px;
      overflow:hidden;box-shadow:var(--shadow);transition:var(--ease)
    }
    .content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#CFE0FF}
    .content-card.large{grid-column:span 1}
    .cover{
      position:relative;aspect-ratio:16/10;overflow:hidden;
      background:linear-gradient(135deg,#EAF2FF,#F8FBFF 45%,#EEE7FF);
    }
    .content-card:hover .cover-art{transform:scale(1.045)}
    .cover-art{position:absolute;inset:0;transition:transform .3s ease}
    .cover-art:before,.cover-art:after{content:"";position:absolute;border-radius:50%;filter:blur(1px)}
    .cover-art:before{width:190px;height:190px;left:-42px;top:18px;background:rgba(37,99,235,.25)}
    .cover-art:after{width:150px;height:150px;right:-30px;bottom:-30px;background:rgba(56,189,248,.32)}
    .cover.lines{
      background:
        linear-gradient(135deg,rgba(37,99,235,.12),rgba(255,255,255,.68)),
        repeating-linear-gradient(90deg,rgba(37,99,235,.08) 0 1px,transparent 1px 22px),
        #F7FAFF;
    }
    .cover.dots{
      background:
        radial-gradient(circle at 25% 30%,rgba(124,58,237,.20),transparent 26%),
        radial-gradient(circle at 80% 20%,rgba(56,189,248,.30),transparent 24%),
        #F8FBFF;
    }
    .lock{
      position:absolute;right:12px;top:12px;
      background:rgba(17,24,39,.72);color:#fff;
      border-radius:999px;padding:6px 10px;font-size:12px;font-weight:800;
      backdrop-filter:blur(10px)
    }
    .card-hover-action{
      position:absolute;left:12px;bottom:12px;opacity:0;transform:translateY(8px);
      transition:var(--ease)
    }
    .content-card:hover .card-hover-action{opacity:1;transform:translateY(0)}
    .small-btn{
      display:inline-flex;align-items:center;justify-content:center;
      min-height:34px;padding:0 12px;border-radius:999px;
      background:#fff;color:var(--primary);font-size:12px;font-weight:900;
      box-shadow:0 8px 18px rgba(15,23,42,.10)
    }
    .card-body{padding:16px}
    .meta-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
    .content-card h3{font-size:18px;line-height:1.35;margin-bottom:8px;letter-spacing:-.02em}
    .content-card p{font-size:14px;color:var(--muted);margin-bottom:14px}
    .card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted-2);font-size:13px;font-weight:700}
    .sidebar{position:sticky;top:96px;display:grid;gap:16px}
    .side-card{
      background:#fff;border:1px solid var(--border);border-radius:24px;
      box-shadow:var(--shadow);padding:18px;
    }
    .side-card.highlight{
      background:linear-gradient(180deg,#FFFFFF,#EFF6FF);
      border-color:#BFDBFE;
      box-shadow:0 18px 44px rgba(37,99,235,.12)
    }
    .side-card h3{font-size:18px;margin-bottom:10px}
    .side-card p{color:var(--muted);font-size:14px;margin-bottom:14px}
    .benefit-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
    .benefit-list li{display:flex;gap:9px;align-items:flex-start;color:#475467;font-size:14px}
    .check{
      width:20px;height:20px;border-radius:999px;background:var(--primary-soft);
      color:var(--primary);display:inline-flex;align-items:center;justify-content:center;
      font-size:12px;font-weight:900;flex:0 0 auto;margin-top:2px
    }
    .tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
    .tag-cloud a{
      padding:7px 10px;border-radius:999px;background:var(--surface-2);
      border:1px solid var(--border);font-size:13px;font-weight:800;color:#475467;
      transition:var(--ease)
    }
    .tag-cloud a:hover{background:var(--primary-soft);color:var(--primary);border-color:#BFDBFE}
    .banner{
      margin-top:26px;
      display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;
      border:1px solid #BFDBFE;background:linear-gradient(135deg,#EFF6FF,#F8FBFF 55%,#F5F3FF);
      border-radius:26px;padding:22px;box-shadow:var(--shadow)
    }
    .banner h2{font-size:24px;line-height:1.25;margin-bottom:6px}
    .banner p{margin-bottom:0;color:var(--muted)}
    .steps{
      display:grid;grid-template-columns:1fr;
      gap:14px;margin-top:10px
    }
    .step{
      display:grid;grid-template-columns:46px 1fr;gap:12px;align-items:start;
      padding:14px;border:1px solid var(--border);border-radius:18px;background:#fff;
      transition:var(--ease)
    }
    .step:hover{border-color:#BFDBFE;box-shadow:0 10px 24px rgba(37,99,235,.08)}
    .step-num{
      width:46px;height:46px;border-radius:16px;
      background:linear-gradient(135deg,var(--primary),var(--cyan));
      color:#fff;font-weight:900;display:flex;align-items:center;justify-content:center
    }
    .step strong{display:block;margin-bottom:2px}
    .step span{display:block;color:var(--muted);font-size:14px}
    .faq-wrap{max-width:850px;margin:0 auto}
    .faq-item{
      background:#fff;border:1px solid var(--border);border-radius:20px;
      margin-bottom:12px;box-shadow:0 8px 22px rgba(15,23,42,.04);overflow:hidden
    }
    .faq-question{
      width:100%;min-height:58px;border:0;background:transparent;
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:17px 20px;text-align:left;color:var(--text);font-weight:850;outline:none
    }
    .faq-icon{width:28px;height:28px;border-radius:999px;background:var(--primary-soft);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;transition:var(--ease)}
    .faq-answer{display:none;padding:0 20px 18px;color:var(--muted);font-size:15px}
    .faq-item.open{background:linear-gradient(180deg,#fff,#F8FBFF)}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-icon{transform:rotate(45deg);background:var(--primary);color:#fff}
    .cta{
      position:relative;border-radius:34px;padding:42px;
      background:
        radial-gradient(circle at 15% 30%,rgba(56,189,248,.22),transparent 30%),
        radial-gradient(circle at 85% 20%,rgba(124,58,237,.13),transparent 28%),
        linear-gradient(135deg,#EFF6FF,#FFFFFF 58%,#F5F3FF);
      border:1px solid #D7E7FF;box-shadow:0 24px 60px rgba(37,99,235,.12);
      overflow:hidden;text-align:center;
    }
    .cta h2{font-size:clamp(26px,3.2vw,38px);line-height:1.2;margin-bottom:10px}
    .cta p{color:var(--muted);max-width:720px;margin:0 auto 22px}
    .cta-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
    .site-footer{background:#F3F7FE;border-top:1px solid var(--border);padding:54px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:34px;margin-bottom:34px}
    .footer-brand{display:flex;align-items:center;gap:10px;font-weight:850;font-size:18px;margin-bottom:12px}
    .footer-text{color:var(--muted);max-width:520px;margin:0}
    .footer-col h3{font-size:15px;margin-bottom:12px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{color:#475467;font-size:14px;transition:var(--ease);width:max-content}
    .footer-links a:hover{color:var(--primary);transform:translateX(2px)}
    .copyright{
      border-top:1px solid var(--border);
      padding-top:18px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
      color:#7A889B;font-size:13px
    }
    @media (max-width:1080px){
      .container{width:min(960px,calc(100% - 48px))}
      .search{width:200px}
      .brand-name{max-width:220px}
      .hero-grid{grid-template-columns:1fr;gap:26px}
      .category-layout{grid-template-columns:1fr}
      .sidebar{position:static;grid-template-columns:repeat(3,1fr)}
      .side-card.highlight{grid-column:span 1}
    }
    @media (max-width:860px){
      .container{width:calc(100% - 32px)}
      .nav{gap:12px}
      .brand-name{max-width:190px;font-size:17px}
      .nav-links{
        position:absolute;left:16px;right:16px;top:calc(var(--header-h) + 8px);
        display:none;flex-direction:column;align-items:stretch;gap:8px;
        background:#fff;border:1px solid var(--border);border-radius:22px;
        padding:12px;box-shadow:0 18px 44px rgba(15,23,42,.12)
      }
      .nav-links.open{display:flex}
      .nav-link{justify-content:center;height:46px}
      .search{display:none}
      .btn-ghost{display:none}
      .menu-toggle{display:inline-flex;align-items:center;justify-content:center}
      .filter-bar{grid-template-columns:1fr}
      .cards-grid{grid-template-columns:1fr 1fr}
      .sidebar{grid-template-columns:1fr}
      .banner{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:640px){
      :root{--header-h:70px}
      .container{width:calc(100% - 28px)}
      .section{padding:58px 0}
      .section-tight{padding:44px 0}
      .hero{padding:42px 0 38px}
      h1{letter-spacing:-.03em}
      .hero-actions .btn,.cta-actions .btn,.banner .btn{width:100%}
      .trust-row{display:grid;grid-template-columns:1fr;gap:8px}
      .preview-panel{border-radius:24px;padding:12px}
      .panel-top{min-height:218px;border-radius:20px}
      .mini-list{grid-template-columns:1fr}
      .cards-grid{grid-template-columns:1fr}
      .section-head{display:block}
      .banner,.cta{padding:22px;border-radius:24px}
      .footer-grid{grid-template-columns:1fr}
      .copyright{display:grid}
      .card-hover-action{opacity:1;transform:none}
    }
    @media (max-width:420px){
      .container{width:calc(100% - 28px)}
      .brand-mark{width:34px;height:34px;border-radius:13px}
      .brand-name{max-width:160px}
      .btn{padding:0 14px}
      .nav-actions{gap:8px}
      .filter-chip,.sort-btn{min-height:40px}
      .content-card,.side-card,.faq-item{border-radius:18px}
    }

/* roulang page: category2 */
:root {
      --primary: #2563EB;
      --primary-dark: #1D4ED8;
      --primary-soft: #EFF6FF;
      --cyan: #38BDF8;
      --violet: #7C3AED;
      --violet-soft: #F3EEFF;
      --warning: #F59E0B;
      --bg: #F6F9FF;
      --bg-2: #EEF5FF;
      --white: #FFFFFF;
      --text: #111827;
      --muted: #667085;
      --muted-2: #98A2B3;
      --border: #E5EAF3;
      --border-strong: #D8E2F0;
      --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
      --shadow-hover: 0 16px 42px rgba(37, 99, 235, 0.14);
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 24px;
      --radius-xl: 30px;
      --container: 1200px;
      --header-h: 76px;
      --ease: 180ms ease;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      overflow-x: hidden;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(56, 189, 248, 0.16), transparent 28%),
        radial-gradient(circle at 88% 12%, rgba(124, 58, 237, 0.12), transparent 26%),
        linear-gradient(180deg, #F8FBFF 0%, var(--bg) 48%, #FFFFFF 100%);
      line-height: 1.75;
      min-height: 100vh;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--ease), background var(--ease), border-color var(--ease), transform var(--ease), box-shadow var(--ease);
    }

    button,
    input {
      font: inherit;
    }

    button {
      cursor: pointer;
      border: 0;
      background: none;
    }

    input {
      border: 0;
      outline: none;
      min-width: 0;
    }

    img,
    svg {
      max-width: 100%;
      display: block;
    }

    :focus-visible {
      outline: 3px solid rgba(37, 99, 235, 0.26);
      outline-offset: 3px;
      border-radius: 12px;
    }

    .container {
      width: min(100% - 64px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      height: var(--header-h);
      background: rgba(255, 255, 255, 0.82);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(229, 234, 243, 0.82);
      transition: box-shadow var(--ease), background var(--ease);
    }

    .site-header.is-scrolled {
      background: rgba(255, 255, 255, 0.96);
      box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
    }

    .nav {
      height: var(--header-h);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand,
    .footer-brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      min-width: 0;
      font-weight: 800;
      letter-spacing: -0.02em;
    }

    .brand {
      flex: 0 0 auto;
    }

    .brand-mark {
      width: 36px;
      height: 36px;
      border-radius: 13px;
      display: inline-grid;
      place-items: center;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--cyan));
      box-shadow: 0 10px 22px rgba(37, 99, 235, 0.22);
      font-size: 15px;
      line-height: 1;
      flex: 0 0 auto;
    }

    .brand-name {
      font-size: 19px;
      color: var(--text);
      white-space: nowrap;
      max-width: 340px;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      flex: 1 1 auto;
    }

    .nav-link {
      padding: 9px 14px;
      border-radius: 999px;
      color: #475467;
      font-weight: 650;
      font-size: 14px;
      white-space: nowrap;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--primary);
      background: var(--primary-soft);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex: 0 0 auto;
    }

    .search {
      width: 250px;
      height: 42px;
      padding: 0 14px;
      border: 1px solid var(--border);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.92);
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--muted-2);
      transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
    }

    .search:focus-within {
      border-color: rgba(37, 99, 235, 0.62);
      box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.10);
      background: #fff;
    }

    .search input {
      width: 100%;
      background: transparent;
      color: var(--text);
      font-size: 14px;
    }

    .search input::placeholder {
      color: #A3ADBC;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 42px;
      padding: 10px 18px;
      border-radius: 999px;
      font-weight: 750;
      font-size: 14px;
      white-space: nowrap;
      border: 1px solid transparent;
      transition: transform var(--ease), box-shadow var(--ease), background var(--ease), color var(--ease), border-color var(--ease);
    }

    .btn:hover {
      transform: translateY(-1px);
    }

    .btn:active {
      transform: scale(0.98);
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 12px 24px rgba(37, 99, 235, 0.22);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 16px 32px rgba(37, 99, 235, 0.26);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.92);
      color: var(--primary);
      border-color: #D8E7FF;
    }

    .btn-ghost:hover {
      background: var(--primary-soft);
      border-color: #BFDBFE;
    }

    .btn-soft {
      background: #EEF6FF;
      color: var(--primary);
      border-color: #DBEAFE;
    }

    .btn-vip {
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--violet));
      box-shadow: 0 14px 30px rgba(124, 58, 237, 0.22);
    }

    .menu-toggle {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      color: var(--primary);
      background: var(--primary-soft);
      display: none;
      font-size: 20px;
      font-weight: 800;
    }

    main {
      overflow: hidden;
    }

    .section {
      padding: 84px 0;
      position: relative;
    }

    .section-tight {
      padding: 64px 0;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 28px;
      margin-bottom: 32px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(37, 99, 235, 0.08);
      color: var(--primary);
      font-size: 13px;
      font-weight: 800;
      margin-bottom: 14px;
    }

    h1,
    h2,
    h3 {
      line-height: 1.18;
      letter-spacing: -0.035em;
      color: var(--text);
    }

    h1 {
      font-size: clamp(32px, 4.8vw, 54px);
      max-width: 720px;
      font-weight: 850;
    }

    h2 {
      font-size: clamp(25px, 3.2vw, 38px);
      font-weight: 820;
    }

    h3 {
      font-size: 20px;
      font-weight: 780;
    }

    .lead {
      margin-top: 18px;
      max-width: 710px;
      color: var(--muted);
      font-size: 17px;
      line-height: 1.85;
    }

    .muted {
      color: var(--muted);
    }

    .hero {
      padding: 88px 0 56px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.06fr) minmax(360px, 0.94fr);
      gap: 48px;
      align-items: center;
    }

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

    .trust-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 28px;
    }

    .trust-item,
    .badge,
    .tag {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      border-radius: 999px;
      font-weight: 750;
      line-height: 1;
      white-space: nowrap;
    }

    .trust-item {
      padding: 9px 12px;
      color: #475467;
      background: rgba(255, 255, 255, 0.86);
      border: 1px solid var(--border);
      box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
      font-size: 13px;
    }

    .badge {
      padding: 7px 10px;
      font-size: 12px;
      color: var(--violet);
      background: var(--violet-soft);
    }

    .badge.hot {
      color: #B45309;
      background: #FFF7ED;
    }

    .badge.blue {
      color: var(--primary);
      background: var(--primary-soft);
    }

    .tag {
      padding: 8px 12px;
      border: 1px solid #DCEAFF;
      background: #F4F8FF;
      color: #51627A;
      font-size: 13px;
      cursor: default;
    }

    .tag:hover {
      background: #EAF3FF;
      color: var(--primary);
    }

    .hero-panel {
      position: relative;
      border-radius: var(--radius-xl);
      padding: 22px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(229, 234, 243, 0.94);
      box-shadow: var(--shadow-hover);
      isolation: isolate;
    }

    .hero-panel::before {
      content: "";
      position: absolute;
      inset: -1px;
      z-index: -1;
      border-radius: inherit;
      background:
        radial-gradient(circle at 22% 18%, rgba(56, 189, 248, 0.22), transparent 34%),
        radial-gradient(circle at 78% 10%, rgba(124, 58, 237, 0.18), transparent 34%),
        linear-gradient(135deg, rgba(255,255,255,.8), rgba(239,246,255,.8));
    }

    .level-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 24px;
      padding: 22px;
      box-shadow: var(--shadow);
    }

    .level-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 18px;
    }

    .level-score {
      width: 64px;
      height: 64px;
      border-radius: 22px;
      display: grid;
      place-items: center;
      color: #fff;
      font-size: 24px;
      font-weight: 900;
      background: linear-gradient(135deg, var(--primary), var(--violet));
      box-shadow: 0 14px 28px rgba(37, 99, 235, 0.22);
    }

    .mini-matrix {
      display: grid;
      gap: 12px;
    }

    .mini-row {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 16px;
      align-items: center;
      padding: 13px 14px;
      border-radius: 16px;
      background: #F8FBFF;
      border: 1px solid #E8EEF8;
    }

    .progress {
      height: 9px;
      border-radius: 999px;
      overflow: hidden;
      background: #EAF0F8;
      margin-top: 8px;
    }

    .progress span {
      display: block;
      height: 100%;
      width: var(--w);
      border-radius: inherit;
      background: linear-gradient(90deg, var(--primary), var(--cyan));
    }

    .topic-steps {
      display: grid;
      gap: 18px;
      position: relative;
    }

    .topic-step {
      display: grid;
      grid-template-columns: 76px 1fr;
      gap: 18px;
      align-items: stretch;
      border-radius: var(--radius-lg);
      padding: 18px;
      background: #fff;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .topic-step:nth-child(even) {
      margin-left: 46px;
      background: linear-gradient(135deg, #FFFFFF, #F7FBFF);
    }

    .topic-step:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #CFE0FF;
    }

    .step-num {
      border-radius: 20px;
      display: grid;
      place-items: center;
      color: #fff;
      font-weight: 900;
      font-size: 22px;
      background: linear-gradient(135deg, var(--primary), var(--cyan));
      min-height: 72px;
    }

    .step-content p {
      color: var(--muted);
      margin-top: 8px;
      font-size: 15px;
    }

    .chip-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }

    .masonry {
      columns: 3 260px;
      column-gap: 22px;
    }

    .preview-card {
      break-inside: avoid;
      display: inline-block;
      width: 100%;
      margin: 0 0 22px;
      border-radius: 24px;
      overflow: hidden;
      background: #fff;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .preview-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #CFE0FF;
    }

    .cover {
      position: relative;
      min-height: var(--h, 220px);
      overflow: hidden;
      background:
        radial-gradient(circle at 22% 18%, rgba(255, 255, 255, 0.55), transparent 17%),
        radial-gradient(circle at 72% 62%, rgba(255, 255, 255, 0.28), transparent 22%),
        linear-gradient(135deg, var(--c1, #2563EB), var(--c2, #38BDF8));
    }

    .cover::before,
    .cover::after {
      content: "";
      position: absolute;
      border-radius: 999px;
      filter: blur(8px);
      opacity: 0.48;
      background: rgba(255,255,255,.65);
      transition: transform 280ms ease;
    }

    .cover::before {
      width: 150px;
      height: 150px;
      left: -44px;
      top: 36px;
    }

    .cover::after {
      width: 110px;
      height: 110px;
      right: 24px;
      bottom: -26px;
    }

    .preview-card:hover .cover::before {
      transform: scale(1.12) translateX(8px);
    }

    .preview-card:hover .cover::after {
      transform: scale(1.12) translateY(-8px);
    }

    .cover-badges {
      position: absolute;
      top: 14px;
      left: 14px;
      right: 14px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      z-index: 2;
    }

    .lock {
      width: 38px;
      height: 38px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: var(--violet);
      background: rgba(255,255,255,.88);
      box-shadow: 0 12px 24px rgba(15,23,42,.10);
      font-weight: 900;
    }

    .card-body {
      padding: 18px;
    }

    .card-body h3 {
      font-size: 18px;
      margin-bottom: 9px;
    }

    .card-body p {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.75;
    }

    .meta {
      margin-top: 15px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      color: #7A8798;
      font-size: 13px;
    }

    .meta span {
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 22px;
      align-items: stretch;
    }

    .price-card {
      position: relative;
      padding: 24px;
      border-radius: 26px;
      background: #fff;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .price-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #CFE0FF;
    }

    .price-card.featured {
      border: 2px solid rgba(37, 99, 235, .52);
      background: linear-gradient(180deg, #FFFFFF, #F3F8FF);
    }

    .recommend {
      position: absolute;
      top: -14px;
      right: 22px;
      padding: 7px 11px;
      border-radius: 999px;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--violet));
      font-size: 12px;
      font-weight: 850;
      box-shadow: 0 10px 20px rgba(37,99,235,.18);
    }

    .price-title {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 14px;
    }

    .price-icon {
      width: 42px;
      height: 42px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      color: var(--primary);
      background: var(--primary-soft);
      font-weight: 900;
    }

    .feature-list {
      list-style: none;
      display: grid;
      gap: 11px;
      margin-top: 18px;
    }

    .feature-list li {
      display: flex;
      gap: 9px;
      align-items: flex-start;
      color: #475467;
      font-size: 14px;
      line-height: 1.6;
    }

    .feature-list li::before {
      content: "✓";
      flex: 0 0 20px;
      width: 20px;
      height: 20px;
      border-radius: 999px;
      display: inline-grid;
      place-items: center;
      color: #fff;
      background: var(--primary);
      font-size: 12px;
      font-weight: 900;
      margin-top: 2px;
    }

    .vip-strip {
      border-radius: 30px;
      padding: 28px;
      background:
        radial-gradient(circle at 16% 22%, rgba(56, 189, 248, 0.22), transparent 24%),
        linear-gradient(135deg, #FFFFFF, #EEF6FF);
      border: 1px solid #DDEBFF;
      box-shadow: var(--shadow);
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
    }

    .strip-stats {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
    }

    .stat-pill {
      min-width: 118px;
      padding: 14px 16px;
      border-radius: 18px;
      background: rgba(255,255,255,.82);
      border: 1px solid var(--border);
    }

    .stat-pill strong {
      display: block;
      color: var(--primary);
      font-size: 22px;
      line-height: 1.1;
    }

    .stat-pill span {
      color: var(--muted);
      font-size: 13px;
      font-weight: 650;
    }

    .faq-wrap {
      max-width: 900px;
      margin: 0 auto;
      display: grid;
      gap: 14px;
    }

    .faq-item {
      border: 1px solid var(--border);
      border-radius: 20px;
      background: #fff;
      box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      min-height: 58px;
      padding: 18px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      color: var(--text);
      font-weight: 780;
      text-align: left;
    }

    .faq-question span:last-child {
      width: 28px;
      height: 28px;
      border-radius: 10px;
      display: inline-grid;
      place-items: center;
      background: var(--primary-soft);
      color: var(--primary);
      flex: 0 0 auto;
      transition: transform var(--ease);
    }

    .faq-answer {
      color: var(--muted);
      padding: 0 20px 18px;
      display: none;
      font-size: 15px;
    }

    .faq-item.open {
      background: linear-gradient(180deg, #FFFFFF, #F7FBFF);
      border-color: #D5E5FF;
    }

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

    .faq-item.open .faq-question span:last-child {
      transform: rotate(45deg);
    }

    .cta {
      padding: 72px 0 92px;
    }

    .cta-box {
      position: relative;
      overflow: hidden;
      border-radius: 34px;
      padding: 42px;
      background:
        radial-gradient(circle at 85% 20%, rgba(124, 58, 237, 0.18), transparent 28%),
        radial-gradient(circle at 12% 16%, rgba(56, 189, 248, 0.24), transparent 28%),
        linear-gradient(135deg, #FFFFFF, #EAF4FF);
      border: 1px solid #DDEBFF;
      box-shadow: var(--shadow-hover);
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 30px;
      align-items: center;
    }

    .cta-box h2 {
      max-width: 680px;
    }

    .cta-box p {
      margin-top: 12px;
      max-width: 680px;
      color: var(--muted);
      font-size: 16px;
    }

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

    .site-footer {
      background: #F3F7FE;
      border-top: 1px solid var(--border);
      padding: 54px 0 28px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.8fr;
      gap: 44px;
      align-items: start;
    }

    .footer-brand {
      font-size: 18px;
      color: var(--text);
    }

    .footer-text {
      margin-top: 14px;
      max-width: 520px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.85;
    }

    .footer-col h3 {
      font-size: 15px;
      margin-bottom: 14px;
      letter-spacing: 0;
    }

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

    .footer-links a {
      color: #5D6B7E;
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--primary);
      transform: translateX(2px);
    }

    .copyright {
      margin-top: 40px;
      padding-top: 22px;
      border-top: 1px solid var(--border);
      display: flex;
      justify-content: space-between;
      gap: 18px;
      flex-wrap: wrap;
      color: #78869A;
      font-size: 13px;
    }

    .copyright strong {
      color: #5D6B7E;
    }

    @media (max-width: 1100px) {
      .container {
        width: min(100% - 48px, 960px);
      }

      .search {
        width: 205px;
      }

      .hero-grid {
        gap: 34px;
        grid-template-columns: 1fr 0.88fr;
      }

      .pricing-grid {
        grid-template-columns: repeat(3, minmax(240px, 1fr));
        overflow-x: auto;
        padding-bottom: 8px;
      }

      .brand-name {
        max-width: 260px;
      }
    }

    @media (max-width: 900px) {
      :root {
        --header-h: 70px;
      }

      .container {
        width: min(100% - 40px, 760px);
      }

      .menu-toggle {
        display: inline-grid;
        place-items: center;
      }

      .nav-links {
        position: absolute;
        left: 20px;
        right: 20px;
        top: calc(var(--header-h) + 8px);
        padding: 14px;
        border-radius: 22px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        background: rgba(255,255,255,.98);
        border: 1px solid var(--border);
        box-shadow: var(--shadow-hover);
      }

      .nav-links.open {
        display: flex;
      }

      .nav-link {
        padding: 12px 14px;
      }

      .search {
        width: 44px;
        padding: 0;
        justify-content: center;
      }

      .search input {
        display: none;
      }

      .btn-ghost {
        display: none;
      }

      .hero {
        padding-top: 62px;
      }

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

      .hero-panel {
        max-width: 620px;
      }

      .section-head {
        display: block;
      }

      .topic-step,
      .topic-step:nth-child(even) {
        margin-left: 0;
      }

      .pricing-grid {
        grid-template-columns: 1fr;
        overflow: visible;
      }

      .vip-strip,
      .cta-box {
        grid-template-columns: 1fr;
      }

      .cta-actions {
        justify-content: flex-start;
      }

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

      .footer-grid > div:first-child {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(100% - 32px, 100%);
      }

      .brand-name {
        max-width: 210px;
        font-size: 16px;
      }

      .brand-mark {
        width: 34px;
        height: 34px;
      }

      .btn-primary.nav-actions .btn,
      .nav-actions > .btn-primary {
        display: none;
      }

      .section {
        padding: 58px 0;
      }

      .section-tight {
        padding: 46px 0;
      }

      .hero {
        padding: 48px 0 36px;
      }

      h1 {
        font-size: 32px;
      }

      .lead {
        font-size: 15px;
      }

      .hero-actions,
      .cta-actions {
        flex-direction: column;
        align-items: stretch;
      }

      .hero-actions .btn,
      .cta-actions .btn {
        width: 100%;
      }

      .trust-row,
      .chip-row,
      .strip-stats {
        gap: 9px;
      }

      .topic-step {
        grid-template-columns: 1fr;
      }

      .step-num {
        width: 64px;
        min-height: 58px;
      }

      .masonry {
        columns: 1;
      }

      .hero-panel,
      .vip-strip,
      .cta-box {
        border-radius: 24px;
        padding: 20px;
      }

      .level-top {
        align-items: flex-start;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      .copyright {
        display: grid;
      }
    }

    @media (max-width: 420px) {
      .container {
        width: min(100% - 28px, 100%);
      }

      .brand-name {
        max-width: 172px;
      }

      .nav {
        gap: 10px;
      }

      .nav-actions {
        gap: 8px;
      }

      .preview-card,
      .price-card,
      .topic-step,
      .faq-item {
        border-radius: 18px;
      }

      .mini-row {
        grid-template-columns: 1fr;
        gap: 8px;
      }
    }