/* roulang page: index */
:root{
      --brand:#2367d1;
      --brand-dark:#174a9a;
      --brand-soft:#eaf2ff;
      --accent:#0f8b8d;
      --accent-soft:#e8f7f7;
      --ink:#172033;
      --text:#334155;
      --muted:#68758a;
      --line:#dbe4f0;
      --bg:#f6f9fd;
      --surface:#ffffff;
      --surface-2:#f9fbff;
      --warning:#f59e0b;
      --success:#16a34a;
      --danger:#dc2626;
      --radius:8px;
      --radius-lg:12px;
      --shadow:0 14px 36px rgba(30,58,108,.10);
      --shadow-sm:0 8px 20px rgba(30,58,108,.08);
      --sidebar:276px;
      --transition:180ms ease;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        linear-gradient(180deg,#f7fbff 0%,#f4f8fe 42%,#eef5fb 100%);
      line-height:1.7;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:color var(--transition),background var(--transition),border-color var(--transition),transform var(--transition),box-shadow var(--transition)}
    a:hover{color:var(--brand)}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
      outline:3px solid rgba(35,103,209,.25);
      outline-offset:3px;
    }
    ::selection{background:rgba(35,103,209,.18);color:var(--ink)}

    .site-shell{
      min-height:100vh;
      display:grid;
      grid-template-columns:var(--sidebar) minmax(0,1fr);
    }
    .sidebar{
      position:sticky;
      top:0;
      height:100vh;
      padding:24px 18px;
      background:rgba(255,255,255,.92);
      border-right:1px solid var(--line);
      box-shadow:8px 0 28px rgba(30,58,108,.05);
      display:flex;
      flex-direction:column;
      z-index:10;
      backdrop-filter:blur(10px);
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      padding:10px 8px 22px;
      border-bottom:1px solid var(--line);
    }
    .brand-mark{
      width:42px;
      height:42px;
      border-radius:10px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--brand),var(--accent));
      box-shadow:0 10px 22px rgba(35,103,209,.22);
      flex:0 0 auto;
    }
    .brand-name{
      color:var(--ink);
      font-weight:800;
      font-size:15px;
      line-height:1.35;
      word-break:break-word;
    }
    .brand-note{
      display:block;
      color:var(--muted);
      font-size:12px;
      font-weight:600;
      margin-top:2px;
    }
    .nav-group{padding:18px 0}
    .nav-label{
      padding:0 10px 8px;
      color:#7a879a;
      font-size:12px;
      font-weight:800;
      letter-spacing:0;
    }
    .nav-link{
      min-height:42px;
      display:flex;
      align-items:center;
      gap:10px;
      color:var(--text);
      border-radius:var(--radius);
      padding:10px 12px;
      margin:4px 0;
      font-weight:700;
      border:1px solid transparent;
    }
    .nav-link i{font-size:17px;color:#6b7a91}
    .nav-link:hover{
      background:var(--brand-soft);
      border-color:#d8e7ff;
      color:var(--brand-dark);
      transform:translateX(2px);
    }
    .nav-link.active{
      background:#f0f6ff;
      border-color:#bdd5ff;
      color:var(--brand-dark);
      box-shadow:inset 3px 0 0 var(--brand);
    }
    .nav-link.active i{color:var(--brand)}
    .sidebar-bottom{
      margin-top:auto;
      padding-top:18px;
      border-top:1px solid var(--line);
    }
    .mini-search{
      display:flex;
      align-items:center;
      gap:8px;
      padding:10px 12px;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:var(--surface-2);
      color:var(--muted);
      font-size:13px;
    }
    .age-badge{
      margin-top:12px;
      display:flex;
      gap:8px;
      align-items:flex-start;
      padding:12px;
      border-radius:var(--radius);
      background:#fff8e7;
      color:#795211;
      font-size:12px;
      border:1px solid #fde4a7;
    }

    .mobile-header{
      display:none;
      position:sticky;
      top:0;
      z-index:30;
      background:rgba(255,255,255,.95);
      border-bottom:1px solid var(--line);
      box-shadow:0 8px 20px rgba(30,58,108,.06);
      backdrop-filter:blur(10px);
    }
    .mobile-header .navbar-brand{
      display:flex;
      align-items:center;
      gap:10px;
      font-size:14px;
      font-weight:800;
      color:var(--ink);
      white-space:normal;
      max-width:72%;
      line-height:1.25;
    }
    .navbar-toggler{
      border:1px solid var(--line);
      border-radius:var(--radius);
      padding:8px 10px;
    }

    .page-content{min-width:0}
    .section{
      padding:76px clamp(18px,4vw,64px);
    }
    .section-inner{
      width:min(1180px,100%);
      margin:0 auto;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:6px 10px;
      border-radius:999px;
      background:var(--accent-soft);
      color:#0b6b70;
      font-size:13px;
      font-weight:800;
      border:1px solid #c9eeee;
    }
    .section-title{
      margin:14px 0 10px;
      color:var(--ink);
      font-size:clamp(28px,3.2vw,46px);
      line-height:1.18;
      font-weight:850;
      letter-spacing:0;
    }
    .section-desc{
      max-width:780px;
      color:var(--muted);
      font-size:16px;
      margin:0 0 28px;
    }

    .btn{
      border-radius:var(--radius);
      font-weight:800;
      padding:11px 18px;
      border-width:1px;
      transition:transform var(--transition),box-shadow var(--transition),background var(--transition),border-color var(--transition),color var(--transition);
    }
    .btn-primary-custom{
      background:var(--brand);
      color:#fff;
      border-color:var(--brand);
      box-shadow:0 12px 24px rgba(35,103,209,.18);
    }
    .btn-primary-custom:hover{
      background:var(--brand-dark);
      color:#fff;
      border-color:var(--brand-dark);
      transform:translateY(-2px);
      box-shadow:0 16px 30px rgba(35,103,209,.24);
    }
    .btn-outline-custom{
      background:#fff;
      color:var(--brand-dark);
      border-color:#b8cff4;
    }
    .btn-outline-custom:hover{
      background:var(--brand-soft);
      color:var(--brand-dark);
      border-color:#94b8ee;
      transform:translateY(-2px);
    }
    .btn:disabled,.btn.disabled{
      opacity:.56;
      pointer-events:none;
      box-shadow:none;
    }

    .hero{
      padding-top:38px;
      padding-bottom:40px;
      background:
        linear-gradient(135deg,rgba(255,255,255,.96),rgba(239,247,255,.96)),
        radial-gradient(circle at 88% 18%,rgba(15,139,141,.12),transparent 28%);
      border-bottom:1px solid var(--line);
    }
    .flash-strip{
      display:grid;
      grid-template-columns:1.2fr auto 1fr auto;
      gap:18px;
      align-items:center;
      padding:18px;
      border:1px solid #cfe0f9;
      border-radius:var(--radius-lg);
      background:linear-gradient(90deg,#ffffff,#eef6ff);
      box-shadow:var(--shadow-sm);
      margin-bottom:22px;
    }
    .flash-label{
      display:flex;
      align-items:center;
      gap:10px;
      color:var(--ink);
      font-weight:850;
    }
    .flash-label i{color:var(--warning);font-size:22px}
    .countdown{
      display:flex;
      gap:8px;
    }
    .time-box{
      min-width:52px;
      padding:8px 9px;
      text-align:center;
      border-radius:var(--radius);
      background:#10203c;
      color:#fff;
      line-height:1.1;
      box-shadow:0 8px 16px rgba(16,32,60,.18);
    }
    .time-box strong{display:block;font-size:20px}
    .time-box span{font-size:11px;color:#c7d7ee}
    .hero-stage{
      display:grid;
      grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);
      gap:28px;
      align-items:stretch;
    }
    .hero-copy{
      padding:28px 0 10px;
    }
    .hero h1{
      margin:12px 0 18px;
      color:var(--ink);
      font-size:clamp(36px,5.1vw,66px);
      line-height:1.08;
      font-weight:900;
      letter-spacing:0;
      word-break:break-word;
    }
    .hero-intro{
      max-width:760px;
      color:#46556b;
      font-size:17px;
      margin-bottom:24px;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-bottom:26px;
    }
    .hero-points{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
      max-width:760px;
    }
    .point{
      padding:14px;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:rgba(255,255,255,.86);
    }
    .point strong{
      display:block;
      color:var(--ink);
      font-size:20px;
      line-height:1.2;
    }
    .point span{color:var(--muted);font-size:13px}

    .deal-card{
      position:relative;
      overflow:hidden;
      min-height:420px;
      border-radius:var(--radius-lg);
      background:#ffffff;
      border:1px solid #d8e5f5;
      box-shadow:var(--shadow);
      padding:18px;
    }
    .deal-top{
      display:flex;
      justify-content:space-between;
      gap:12px;
      align-items:flex-start;
      margin-bottom:16px;
    }
    .badge-soft{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:6px 9px;
      border-radius:999px;
      background:var(--brand-soft);
      color:var(--brand-dark);
      border:1px solid #d4e5ff;
      font-size:12px;
      font-weight:800;
    }
    .product-panel{
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:
        linear-gradient(180deg,#f9fbff,#ffffff);
      padding:16px;
    }
    .screen-bar{
      display:flex;
      gap:6px;
      margin-bottom:14px;
    }
    .screen-bar span{
      width:8px;height:8px;border-radius:50%;background:#a8b6ca;
    }
    .mock-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:12px;
      min-height:220px;
    }
    .preview-tile{
      border-radius:var(--radius);
      border:1px solid #d7e3f3;
      background:
        linear-gradient(135deg,rgba(35,103,209,.14),rgba(15,139,141,.10)),
        repeating-linear-gradient(135deg,#fff 0 12px,#f2f7fd 12px 24px);
      padding:14px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .preview-tile.dark{
      background:#10203c;
      color:#fff;
      border-color:#10203c;
    }
    .preview-line{
      height:9px;
      width:70%;
      border-radius:99px;
      background:#d7e5f7;
      margin-bottom:8px;
    }
    .preview-tile.dark .preview-line{background:#38506f}
    .meter{
      height:8px;
      border-radius:99px;
      background:#e8eef7;
      overflow:hidden;
      margin-top:8px;
    }
    .meter span{display:block;height:100%;background:var(--accent);border-radius:99px}
    .price-row{
      display:flex;
      justify-content:space-between;
      align-items:end;
      gap:12px;
      margin-top:16px;
    }
    .price-row strong{
      color:var(--danger);
      font-size:30px;
      line-height:1;
    }
    .next-peek{
      margin-top:22px;
      padding:14px 18px;
      border-radius:var(--radius);
      background:rgba(255,255,255,.72);
      border:1px dashed #b8cff4;
      color:var(--muted);
      font-weight:700;
    }

    .vertical-feed{
      background:#fff;
    }
    .reel-row{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:16px;
    }
    .reel-card{
      min-height:330px;
      border-radius:var(--radius-lg);
      border:1px solid var(--line);
      background:#fff;
      box-shadow:var(--shadow-sm);
      padding:14px;
      display:flex;
      flex-direction:column;
      transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
    }
    .reel-card:hover{
      transform:translateY(-4px);
      border-color:#bdd5ff;
      box-shadow:var(--shadow);
    }
    .reel-visual{
      aspect-ratio:9/14;
      border-radius:var(--radius);
      background:
        linear-gradient(180deg,rgba(35,103,209,.16),rgba(15,139,141,.18)),
        linear-gradient(135deg,#ffffff,#eaf2ff);
      border:1px solid #d9e6f7;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      padding:12px;
      margin-bottom:12px;
    }
    .reel-card:nth-child(2) .reel-visual{background:linear-gradient(180deg,rgba(15,139,141,.16),rgba(245,158,11,.12)),linear-gradient(135deg,#fff,#eefafa)}
    .reel-card:nth-child(3) .reel-visual{background:linear-gradient(180deg,rgba(23,74,154,.14),rgba(22,163,74,.12)),linear-gradient(135deg,#fff,#f3fbf5)}
    .reel-card:nth-child(4) .reel-visual{background:linear-gradient(180deg,rgba(220,38,38,.10),rgba(35,103,209,.15)),linear-gradient(135deg,#fff,#fff4f4)}
    .reel-title{
      color:var(--ink);
      font-weight:850;
      margin:0 0 6px;
      line-height:1.35;
    }
    .reel-text{
      color:var(--muted);
      font-size:14px;
      margin:0;
    }

    .solution{
      background:linear-gradient(180deg,#f6f9fd,#ffffff);
    }
    .solution-stack{
      display:grid;
      gap:16px;
    }
    .solution-item{
      display:grid;
      grid-template-columns:74px minmax(0,1fr) auto;
      gap:18px;
      align-items:center;
      padding:18px;
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:#fff;
      box-shadow:var(--shadow-sm);
      min-height:118px;
    }
    .icon-box{
      width:58px;
      height:58px;
      border-radius:var(--radius);
      display:grid;
      place-items:center;
      color:var(--brand);
      background:var(--brand-soft);
      border:1px solid #d4e5ff;
      font-size:24px;
    }
    .solution-item h3{
      margin:0 0 4px;
      color:var(--ink);
      font-size:20px;
      font-weight:850;
    }
    .solution-item p{margin:0;color:var(--muted)}
    .arrow-link{
      display:inline-flex;
      align-items:center;
      gap:6px;
      color:var(--brand-dark);
      font-weight:850;
      white-space:nowrap;
    }
    .arrow-link:hover{gap:10px}

    .hot-list{
      background:#f7fbff;
    }
    .hot-layout{
      display:grid;
      grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);
      gap:18px;
      align-items:start;
    }
    .rank-list{
      display:grid;
      gap:12px;
    }
    .rank-card{
      display:grid;
      grid-template-columns:54px minmax(0,1fr) auto;
      gap:14px;
      align-items:center;
      padding:16px;
      border-radius:var(--radius);
      border:1px solid var(--line);
      background:#fff;
      box-shadow:var(--shadow-sm);
    }
    .rank-num{
      width:44px;height:44px;
      display:grid;place-items:center;
      border-radius:var(--radius);
      background:#10203c;
      color:#fff;
      font-weight:900;
    }
    .rank-card h3{
      margin:0 0 4px;
      color:var(--ink);
      font-size:18px;
      font-weight:850;
    }
    .rank-card p{margin:0;color:var(--muted);font-size:14px}
    .tag-row{display:flex;flex-wrap:wrap;gap:8px}
    .tag{
      display:inline-flex;
      align-items:center;
      min-height:28px;
      padding:4px 9px;
      border-radius:999px;
      border:1px solid var(--line);
      background:#fff;
      color:#5d6b80;
      font-size:12px;
      font-weight:800;
    }
    .side-panel{
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:#fff;
      box-shadow:var(--shadow-sm);
      padding:18px;
    }
    .side-panel h3{
      color:var(--ink);
      font-size:19px;
      font-weight:850;
      margin:0 0 12px;
    }
    .filter-pill{
      width:100%;
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:10px;
      padding:10px 12px;
      margin:8px 0;
      border-radius:var(--radius);
      border:1px solid var(--line);
      background:#f9fbff;
      color:var(--text);
      font-weight:750;
    }
    .filter-pill:hover{
      border-color:#bdd5ff;
      background:var(--brand-soft);
      color:var(--brand-dark);
    }

    .timeline{
      background:#fff;
    }
    .timeline-grid{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:14px;
      counter-reset:step;
    }
    .step-card{
      position:relative;
      min-height:180px;
      padding:18px;
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:#fff;
      box-shadow:var(--shadow-sm);
    }
    .step-card:before{
      counter-increment:step;
      content:counter(step,decimal-leading-zero);
      display:inline-flex;
      width:42px;height:32px;
      align-items:center;justify-content:center;
      border-radius:var(--radius);
      background:var(--accent-soft);
      color:#0b6b70;
      font-weight:900;
      margin-bottom:16px;
    }
    .step-card h3{
      color:var(--ink);
      font-size:18px;
      font-weight:850;
      margin:0 0 8px;
    }
    .step-card p{margin:0;color:var(--muted);font-size:14px}
    .metric-row{
      margin-top:18px;
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:14px;
    }
    .metric{
      padding:18px;
      border-radius:var(--radius-lg);
      border:1px solid #cfe0f9;
      background:linear-gradient(180deg,#fff,#f2f7ff);
    }
    .metric strong{
      color:var(--brand-dark);
      font-size:34px;
      font-weight:900;
      line-height:1;
      display:block;
    }
    .metric span{color:var(--muted);font-size:14px}

    .reviews{
      background:#f7fbff;
    }
    .review-wall{
      display:grid;
      grid-template-columns:1fr 1.2fr 1fr;
      gap:16px;
      align-items:stretch;
    }
    .review-card{
      min-height:210px;
      padding:18px;
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:#fff;
      box-shadow:var(--shadow-sm);
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .review-card.featured{
      background:#10203c;
      color:#fff;
      border-color:#10203c;
    }
    .review-card.featured p,.review-card.featured .user-meta{color:#d5e2f2}
    .stars{color:#f6b73c;font-size:15px;margin-bottom:10px}
    .review-card p{margin:0;color:#44546a}
    .user{
      display:flex;
      align-items:center;
      gap:10px;
      margin-top:18px;
    }
    .avatar{
      width:38px;height:38px;border-radius:50%;
      display:grid;place-items:center;
      background:var(--brand-soft);
      color:var(--brand-dark);
      font-weight:900;
      border:1px solid #d4e5ff;
    }
    .user-name{font-weight:850;color:var(--ink)}
    .review-card.featured .user-name{color:#fff}
    .user-meta{font-size:12px;color:var(--muted)}

    .news{
      background:#fff;
    }
    .news-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 360px;
      gap:18px;
    }
    .news-list{
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:#fff;
      box-shadow:var(--shadow-sm);
      overflow:hidden;
    }
    .news-item{
      display:grid;
      grid-template-columns:128px minmax(0,1fr) auto;
      gap:16px;
      align-items:center;
      padding:16px;
      border-bottom:1px solid var(--line);
    }
    .news-item:last-child{border-bottom:0}
    .news-date{
      color:var(--brand-dark);
      font-weight:900;
      background:var(--brand-soft);
      border:1px solid #d4e5ff;
      border-radius:var(--radius);
      padding:9px 10px;
      text-align:center;
      font-size:13px;
    }
    .news-item h3{
      margin:0 0 4px;
      color:var(--ink);
      font-size:17px;
      font-weight:850;
    }
    .news-item p{margin:0;color:var(--muted);font-size:14px}
    .recommend-box{
      border-radius:var(--radius-lg);
      border:1px solid var(--line);
      background:#f9fbff;
      box-shadow:var(--shadow-sm);
      padding:18px;
    }
    .recommend-box h3{
      color:var(--ink);
      font-size:19px;
      font-weight:850;
      margin:0 0 12px;
    }
    .mini-list{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:10px;
    }
    .mini-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:var(--text);
      font-weight:700;
    }
    .mini-list i{color:var(--accent);margin-top:4px}

    .faq{
      background:linear-gradient(180deg,#f7fbff,#fff);
    }
    .accordion{
      border-radius:var(--radius-lg);
      overflow:hidden;
      box-shadow:var(--shadow-sm);
      border:1px solid var(--line);
    }
    .accordion-item{
      border:0;
      border-bottom:1px solid var(--line);
    }
    .accordion-item:last-child{border-bottom:0}
    .accordion-button{
      color:var(--ink);
      font-weight:850;
      background:#fff;
      padding:18px;
      box-shadow:none;
    }
    .accordion-button:not(.collapsed){
      color:var(--brand-dark);
      background:#f0f6ff;
      box-shadow:none;
    }
    .accordion-body{
      color:var(--muted);
      padding:0 18px 18px;
      background:#fff;
    }

    .cart-cta{
      padding-bottom:96px;
      background:#fff;
    }
    .cta-box{
      display:grid;
      grid-template-columns:minmax(0,1fr) auto;
      gap:22px;
      align-items:center;
      padding:28px;
      border-radius:var(--radius-lg);
      border:1px solid #bdd5ff;
      background:
        linear-gradient(135deg,#ffffff,#edf5ff 70%,#e9f7f7);
      box-shadow:var(--shadow);
    }
    .cta-box h2{
      color:var(--ink);
      font-size:clamp(26px,3vw,42px);
      font-weight:900;
      margin:0 0 8px;
      letter-spacing:0;
    }
    .cta-box p{margin:0;color:var(--muted);max-width:760px}
    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      justify-content:flex-end;
    }
    .contact-line{
      margin-top:12px;
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      color:#5b687b;
      font-size:14px;
      font-weight:700;
    }

    .floating-cta{
      position:fixed;
      left:calc(var(--sidebar) + 28px);
      right:28px;
      bottom:18px;
      z-index:20;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      padding:12px 14px;
      border:1px solid #bdd5ff;
      border-radius:var(--radius-lg);
      background:rgba(255,255,255,.94);
      box-shadow:0 12px 30px rgba(30,58,108,.16);
      backdrop-filter:blur(12px);
    }
    .floating-cta strong{color:var(--ink)}
    .floating-cta span{color:var(--muted);font-size:13px}

    .site-footer{
      padding:38px clamp(18px,4vw,64px);
      background:#10203c;
      color:#d6e1ef;
    }
    .footer-inner{
      width:min(1180px,100%);
      margin:0 auto;
      display:grid;
      grid-template-columns:1.3fr .7fr .8fr;
      gap:28px;
    }
    .footer-brand{
      font-size:18px;
      font-weight:900;
      color:#fff;
      margin-bottom:10px;
    }
    .footer-text{color:#b9c7d9;margin:0;max-width:560px}
    .footer-title{
      color:#fff;
      font-weight:850;
      margin-bottom:10px;
    }
    .footer-links{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:8px;
    }
    .footer-links a{color:#c9d7e8}
    .footer-links a:hover{color:#fff}
    .copyright{
      width:min(1180px,100%);
      margin:26px auto 0;
      padding-top:18px;
      border-top:1px solid rgba(255,255,255,.14);
      color:#9fb1c8;
      font-size:13px;
      display:flex;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;
    }

    @media (max-width:1180px){
      :root{--sidebar:248px}
      .hero-stage{grid-template-columns:1fr}
      .deal-card{min-height:auto}
      .reel-row{grid-template-columns:repeat(2,minmax(0,1fr))}
      .timeline-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .review-wall{grid-template-columns:1fr}
      .news-layout,.hot-layout{grid-template-columns:1fr}
    }
    @media (max-width:991.98px){
      .site-shell{display:block}
      .sidebar{display:none}
      .mobile-header{display:block}
      .section{padding:58px 18px}
      .hero{padding-top:28px}
      .flash-strip{
        grid-template-columns:1fr;
        gap:12px;
      }
      .countdown{justify-content:flex-start}
      .hero-points{grid-template-columns:1fr}
      .solution-item{
        grid-template-columns:58px minmax(0,1fr);
      }
      .solution-item .arrow-link{grid-column:2}
      .floating-cta{
        left:14px;
        right:14px;
        bottom:12px;
      }
      .footer-inner{grid-template-columns:1fr}
    }
    @media (max-width:767.98px){
      .section-title{font-size:30px}
      .hero h1{font-size:38px}
      .mock-grid{grid-template-columns:1fr}
      .reel-row{grid-template-columns:1fr}
      .rank-card{
        grid-template-columns:44px minmax(0,1fr);
      }
      .rank-card .tag-row{grid-column:2}
      .timeline-grid,.metric-row{grid-template-columns:1fr}
      .news-item{
        grid-template-columns:1fr;
        gap:10px;
      }
      .news-date{text-align:left}
      .cta-box{grid-template-columns:1fr}
      .cta-actions{justify-content:flex-start}
      .floating-cta{
        align-items:flex-start;
        flex-direction:column;
      }
    }
    @media (max-width:520px){
      .section{padding-left:14px;padding-right:14px}
      .brand-name,.mobile-header .navbar-brand{font-size:13px}
      .hero-actions .btn,.cta-actions .btn,.floating-cta .btn{
        width:100%;
        justify-content:center;
      }
      .time-box{min-width:48px}
      .product-panel,.deal-card,.cta-box{padding:14px}
      .solution-item{
        grid-template-columns:1fr;
        gap:12px;
      }
      .solution-item .arrow-link{grid-column:1}
    }

/* roulang page: category1 */
:root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --accent: #0f766e;
      --ink: #122033;
      --muted: #667085;
      --soft: #f4f7fb;
      --panel: #ffffff;
      --line: #dbe4f0;
      --line-strong: #c7d2e3;
      --warning: #b45309;
      --success: #15803d;
      --radius: 8px;
      --radius-lg: 12px;
      --shadow: 0 14px 36px rgba(18, 32, 51, .08);
      --shadow-sm: 0 8px 20px rgba(18, 32, 51, .06);
      --sidebar: 268px;
      --ease: all .22s ease;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-height: 100vh;
      font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at 85% 5%, rgba(37, 99, 235, .08), transparent 30%),
        linear-gradient(180deg, #f8fbff 0%, #eef4fb 48%, #f8fbff 100%);
      line-height: 1.72;
      letter-spacing: 0;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--ease);
    }

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

    button,
    input,
    select,
    textarea {
      font: inherit;
    }

    button:focus-visible,
    a:focus-visible,
    input:focus-visible,
    select:focus-visible {
      outline: 3px solid rgba(37, 99, 235, .24);
      outline-offset: 3px;
    }

    .site-shell {
      min-height: 100vh;
    }

    .sidebar {
      position: fixed;
      inset: 0 auto 0 0;
      width: var(--sidebar);
      background: rgba(255, 255, 255, .94);
      border-right: 1px solid var(--line);
      box-shadow: 10px 0 30px rgba(18, 32, 51, .04);
      padding: 24px 18px;
      z-index: 1040;
      display: flex;
      flex-direction: column;
      backdrop-filter: blur(16px);
    }

    .brand-block {
      padding: 14px 12px 18px;
      border-bottom: 1px solid var(--line);
    }

    .brand-mark {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      color: var(--ink);
      line-height: 1.35;
      font-size: 17px;
    }

    .brand-mark i {
      width: 36px;
      height: 36px;
      border-radius: var(--radius);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow: 0 10px 22px rgba(37, 99, 235, .22);
      flex: 0 0 auto;
    }

    .brand-note {
      margin: 10px 0 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.65;
    }

    .nav-group {
      padding: 20px 0;
    }

    .nav-label {
      color: #8a97aa;
      font-size: 12px;
      font-weight: 700;
      padding: 0 12px 8px;
      letter-spacing: .08em;
    }

    .nav-link {
      min-height: 44px;
      margin: 6px 0;
      padding: 10px 12px;
      border-radius: var(--radius);
      color: #44546a;
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      border: 1px solid transparent;
    }

    .nav-link i {
      font-size: 18px;
      color: #5f7190;
    }

    .nav-link:hover {
      background: #eef5ff;
      color: var(--primary-dark);
      transform: translateX(2px);
    }

    .nav-link.active {
      color: var(--primary-dark);
      background: #eaf2ff;
      border-color: #cfe0ff;
      box-shadow: var(--shadow-sm);
    }

    .nav-link.active i {
      color: var(--primary);
    }

    .sidebar-bottom {
      margin-top: auto;
      padding: 16px 12px 0;
      border-top: 1px solid var(--line);
      color: var(--muted);
      font-size: 13px;
    }

    .sidebar-bottom a {
      color: var(--primary-dark);
      font-weight: 700;
    }

    .mobile-header {
      display: none;
      position: sticky;
      top: 0;
      z-index: 1050;
      background: rgba(255, 255, 255, .95);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(16px);
    }

    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 15px;
      line-height: 1.35;
    }

    .mobile-brand i {
      color: var(--primary);
      font-size: 20px;
    }

    .navbar-toggler {
      border-radius: var(--radius);
      border-color: var(--line-strong);
      padding: 8px 10px;
    }

    .page {
      margin-left: var(--sidebar);
      min-height: 100vh;
    }

    .content-wrap {
      width: min(1180px, calc(100% - 48px));
      margin: 0 auto;
    }

    .category-hero {
      padding: 44px 0 26px;
    }

    .profile-panel {
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: var(--panel);
      box-shadow: var(--shadow);
    }

    .cover-strip {
      min-height: 168px;
      padding: 28px;
      color: #fff;
      background:
        linear-gradient(135deg, rgba(18, 32, 51, .92), rgba(37, 99, 235, .76)),
        linear-gradient(90deg, #0f766e, #2563eb);
      display: grid;
      grid-template-columns: 1.4fr .8fr;
      gap: 24px;
      align-items: end;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 10px;
      border-radius: 999px;
      background: rgba(255, 255, 255, .14);
      border: 1px solid rgba(255, 255, 255, .28);
      color: #f2f7ff;
      font-size: 13px;
      font-weight: 700;
    }

    .category-hero h1 {
      margin: 16px 0 10px;
      font-size: clamp(30px, 4.2vw, 54px);
      line-height: 1.12;
      font-weight: 900;
      letter-spacing: 0;
    }

    .hero-summary {
      margin: 0;
      max-width: 720px;
      color: rgba(255, 255, 255, .86);
      font-size: 16px;
    }

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

    .btn-main,
    .btn-ghost,
    .btn-soft {
      border-radius: var(--radius);
      min-height: 44px;
      padding: 10px 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 800;
      border: 1px solid transparent;
      transition: var(--ease);
    }

    .btn-main {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 12px 22px rgba(37, 99, 235, .22);
    }

    .btn-main:hover,
    .btn-main:active {
      background: var(--primary-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 16px 30px rgba(37, 99, 235, .28);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, .12);
      color: #fff;
      border-color: rgba(255, 255, 255, .34);
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, .22);
      color: #fff;
      transform: translateY(-2px);
    }

    .btn-soft {
      color: var(--primary-dark);
      background: #eef5ff;
      border-color: #d5e5ff;
    }

    .btn-soft:hover {
      background: #e0edff;
      color: var(--primary-dark);
      transform: translateY(-2px);
    }

    .metric-stack {
      display: grid;
      gap: 12px;
      justify-self: end;
      width: min(320px, 100%);
    }

    .metric-card {
      padding: 14px;
      border-radius: var(--radius);
      background: rgba(255, 255, 255, .12);
      border: 1px solid rgba(255, 255, 255, .26);
    }

    .metric-card strong {
      display: block;
      font-size: 25px;
      line-height: 1.1;
    }

    .metric-card span {
      display: block;
      margin-top: 5px;
      color: rgba(255, 255, 255, .78);
      font-size: 13px;
    }

    .profile-row {
      padding: 18px 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      background: #fff;
    }

    .avatar {
      width: 62px;
      height: 62px;
      border-radius: var(--radius);
      background: linear-gradient(135deg, #dbeafe, #ccfbf1);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-dark);
      font-size: 28px;
      flex: 0 0 auto;
    }

    .profile-name {
      font-weight: 900;
      font-size: 18px;
    }

    .profile-desc {
      margin: 2px 0 0;
      color: var(--muted);
      font-size: 14px;
    }

    .profile-badges {
      margin-left: auto;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 7px 10px;
      border-radius: 999px;
      background: #f2f6fb;
      color: #475569;
      border: 1px solid var(--line);
      font-size: 13px;
      font-weight: 800;
    }

    .toolbar {
      margin: 24px 0 0;
      padding: 16px;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: rgba(255, 255, 255, .86);
      box-shadow: var(--shadow-sm);
      display: grid;
      grid-template-columns: 1fr auto auto;
      gap: 12px;
      align-items: center;
    }

    .search-box {
      position: relative;
    }

    .search-box i {
      position: absolute;
      left: 14px;
      top: 50%;
      transform: translateY(-50%);
      color: #7a879a;
    }

    .search-box input,
    .toolbar select {
      width: 100%;
      min-height: 44px;
      border: 1px solid var(--line-strong);
      border-radius: var(--radius);
      background: #fff;
      color: var(--ink);
      padding: 9px 12px;
    }

    .search-box input {
      padding-left: 42px;
    }

    .filter-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .chip {
      border: 1px solid var(--line-strong);
      background: #fff;
      color: #536276;
      border-radius: 999px;
      padding: 8px 12px;
      font-weight: 800;
      font-size: 13px;
      transition: var(--ease);
    }

    .chip:hover,
    .chip.active {
      border-color: #a9c7ff;
      background: #eaf2ff;
      color: var(--primary-dark);
    }

    .section {
      padding: 34px 0;
    }

    .section-tight {
      padding-top: 18px;
    }

    .section-head {
      margin-bottom: 18px;
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 18px;
    }

    .section-kicker {
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 900;
      margin-bottom: 6px;
    }

    .section-title {
      margin: 0;
      font-size: clamp(24px, 3vw, 34px);
      line-height: 1.22;
      font-weight: 900;
    }

    .section-text {
      margin: 8px 0 0;
      color: var(--muted);
      max-width: 700px;
    }

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

    .selection-list {
      display: grid;
      gap: 16px;
    }

    .selection-card {
      min-height: 190px;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: #fff;
      box-shadow: var(--shadow-sm);
      padding: 22px;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 18px;
      transition: var(--ease);
    }

    .selection-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow);
      border-color: #bfd3ef;
    }

    .card-topline {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 12px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      padding: 5px 9px;
      border-radius: 999px;
      background: #f3f7fc;
      border: 1px solid var(--line);
      color: #56667c;
      font-size: 12px;
      font-weight: 800;
    }

    .tag.hot {
      color: var(--warning);
      background: #fff7ed;
      border-color: #fed7aa;
    }

    .selection-card h2 {
      margin: 0 0 9px;
      font-size: 21px;
      line-height: 1.35;
      font-weight: 900;
    }

    .selection-card p {
      margin: 0;
      color: var(--muted);
      font-size: 15px;
    }

    .card-meta {
      margin-top: 18px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      color: #748198;
      font-size: 13px;
      font-weight: 700;
    }

    .score-box {
      min-width: 118px;
      border-radius: var(--radius);
      border: 1px solid #dbeafe;
      background: #f7fbff;
      padding: 14px;
      align-self: stretch;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      text-align: right;
    }

    .score-box strong {
      color: var(--primary-dark);
      font-size: 30px;
      line-height: 1;
      font-weight: 900;
    }

    .score-box span {
      color: var(--muted);
      font-size: 12px;
      font-weight: 800;
    }

    .side-panel {
      position: sticky;
      top: 24px;
      display: grid;
      gap: 16px;
    }

    .panel-card,
    .info-card {
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: #fff;
      box-shadow: var(--shadow-sm);
      padding: 20px;
    }

    .panel-card h3,
    .info-card h3 {
      margin: 0 0 12px;
      font-size: 18px;
      font-weight: 900;
    }

    .recommend-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 12px;
    }

    .recommend-list li {
      padding: 12px;
      border-radius: var(--radius);
      background: #f6f9fd;
      border: 1px solid var(--line);
    }

    .recommend-list strong {
      display: block;
      font-size: 14px;
      margin-bottom: 3px;
    }

    .recommend-list span {
      color: var(--muted);
      font-size: 13px;
    }

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

    .check-list li {
      display: flex;
      gap: 10px;
      color: #4f5e73;
      font-size: 14px;
    }

    .check-list i {
      color: var(--success);
      margin-top: 4px;
      flex: 0 0 auto;
    }

    .flow {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .flow-item {
      min-height: 168px;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: #fff;
      padding: 20px;
      box-shadow: var(--shadow-sm);
    }

    .flow-num {
      width: 38px;
      height: 38px;
      border-radius: var(--radius);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #eaf2ff;
      color: var(--primary-dark);
      font-weight: 900;
      margin-bottom: 14px;
    }

    .flow-item h3 {
      margin: 0 0 8px;
      font-size: 18px;
      font-weight: 900;
    }

    .flow-item p {
      margin: 0;
      color: var(--muted);
      font-size: 15px;
    }

    .quote-row {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 18px;
    }

    .quote-card {
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: #fff;
      box-shadow: var(--shadow-sm);
      padding: 22px;
    }

    .rating {
      color: #f59e0b;
      letter-spacing: 0;
      margin-bottom: 10px;
    }

    .quote-card blockquote {
      margin: 0;
      color: #334155;
      font-size: 16px;
      font-weight: 700;
    }

    .quote-card cite {
      margin-top: 14px;
      display: block;
      color: var(--muted);
      font-style: normal;
      font-size: 13px;
    }

    .accordion {
      --bs-accordion-border-color: var(--line);
      --bs-accordion-border-radius: var(--radius-lg);
      --bs-accordion-inner-border-radius: var(--radius);
      --bs-accordion-btn-focus-box-shadow: 0 0 0 .25rem rgba(37, 99, 235, .16);
      --bs-accordion-active-bg: #eef5ff;
      --bs-accordion-active-color: var(--primary-dark);
    }

    .accordion-item {
      margin-bottom: 10px;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .accordion-button {
      font-weight: 900;
      color: var(--ink);
      padding: 18px 20px;
    }

    .accordion-body {
      color: var(--muted);
      padding: 18px 20px 20px;
      background: #fff;
    }

    .cta-band {
      border-radius: var(--radius-lg);
      border: 1px solid #bdd4ff;
      background:
        linear-gradient(135deg, rgba(239, 246, 255, .98), rgba(236, 253, 245, .9)),
        #fff;
      box-shadow: var(--shadow);
      padding: 28px;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 20px;
      align-items: center;
    }

    .cta-band h2 {
      margin: 0 0 8px;
      font-size: clamp(24px, 3vw, 34px);
      font-weight: 900;
      line-height: 1.25;
    }

    .cta-band p {
      margin: 0;
      color: var(--muted);
      max-width: 720px;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: flex-end;
    }

    .site-footer {
      margin-top: 36px;
      background: #101928;
      color: #e5edf8;
      padding: 36px 0 22px;
    }

    .footer-inner {
      width: min(1180px, calc(100% - 48px));
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1.25fr .7fr .9fr;
      gap: 28px;
    }

    .footer-brand {
      font-size: 18px;
      font-weight: 900;
      margin-bottom: 10px;
    }

    .footer-text {
      color: #a9b8ca;
      margin: 0;
      max-width: 520px;
      font-size: 14px;
    }

    .footer-title {
      font-weight: 900;
      margin-bottom: 10px;
    }

    .footer-links {
      margin: 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 8px;
    }

    .footer-links a {
      color: #b7c5d8;
      font-size: 14px;
    }

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

    .copyright {
      width: min(1180px, calc(100% - 48px));
      margin: 24px auto 0;
      padding-top: 18px;
      border-top: 1px solid rgba(255, 255, 255, .12);
      display: flex;
      justify-content: space-between;
      gap: 14px;
      flex-wrap: wrap;
      color: #91a0b5;
      font-size: 13px;
    }

    .back-top {
      position: fixed;
      right: 22px;
      bottom: 22px;
      width: 44px;
      height: 44px;
      border-radius: var(--radius);
      background: var(--primary);
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 14px 24px rgba(37, 99, 235, .25);
      z-index: 1000;
    }

    .back-top:hover {
      background: var(--primary-dark);
      color: #fff;
      transform: translateY(-2px);
    }

    @media (max-width: 1180px) {
      .content-grid {
        grid-template-columns: 1fr;
      }

      .side-panel {
        position: static;
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 1024px) {
      .sidebar {
        display: none;
      }

      .mobile-header {
        display: block;
      }

      .page {
        margin-left: 0;
      }

      .content-wrap,
      .footer-inner,
      .copyright {
        width: min(100% - 32px, 940px);
      }

      .cover-strip {
        grid-template-columns: 1fr;
      }

      .metric-stack {
        justify-self: stretch;
        grid-template-columns: repeat(3, 1fr);
      }

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

      .filter-chips {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 2px;
      }

      .chip {
        white-space: nowrap;
      }
    }

    @media (max-width: 768px) {
      .category-hero {
        padding-top: 24px;
      }

      .cover-strip {
        padding: 22px;
      }

      .profile-row {
        padding: 16px;
        align-items: flex-start;
      }

      .profile-badges {
        margin-left: 0;
        width: 100%;
      }

      .metric-stack,
      .flow,
      .quote-row,
      .side-panel,
      .footer-inner,
      .cta-band {
        grid-template-columns: 1fr;
      }

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

      .score-box {
        text-align: left;
        min-width: auto;
        gap: 8px;
      }

      .section-head {
        align-items: flex-start;
        flex-direction: column;
      }

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

      .footer-inner {
        gap: 22px;
      }
    }

    @media (max-width: 520px) {
      .content-wrap,
      .footer-inner,
      .copyright {
        width: calc(100% - 24px);
      }

      .category-hero h1 {
        font-size: 29px;
      }

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

      .btn-main,
      .btn-ghost,
      .btn-soft {
        width: 100%;
      }

      .metric-stack {
        grid-template-columns: 1fr;
      }

      .selection-card,
      .panel-card,
      .info-card,
      .flow-item,
      .quote-card,
      .cta-band {
        padding: 18px;
      }

      .site-footer {
        padding-bottom: 72px;
      }
    }