/* roulang page: index */
:root{
      --primary:#2563eb;
      --primary-600:#1d4ed8;
      --primary-50:#eff6ff;
      --primary-100:#dbeafe;
      --accent:#12b8a6;
      --accent-50:#ecfeff;
      --warning:#f59e0b;
      --text:#111827;
      --text-soft:#334155;
      --muted:#667085;
      --muted-2:#94a3b8;
      --bg:#f6f9fd;
      --bg-soft:#f8fafc;
      --white:#ffffff;
      --line:#e3eaf5;
      --line-strong:#cbdaf0;
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
      --radius-pill:999px;
      --shadow:0 16px 40px rgba(30,64,175,.08);
      --shadow-hover:0 22px 58px rgba(30,64,175,.13);
      --shadow-soft:0 10px 30px rgba(15,23,42,.06);
      --container:1220px;
      --section:92px;
      --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 CJK SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 10% 8%, rgba(37,99,235,.10), transparent 30%),
        radial-gradient(circle at 88% 12%, rgba(18,184,166,.11), transparent 26%),
        linear-gradient(180deg,#ffffff 0%, var(--bg) 42%, #ffffff 100%);
      line-height:1.78;
      overflow-x:hidden;
      padding-bottom:0;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    a:hover{color:var(--primary)}
    img{max-width:100%;height:auto;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    input,select,textarea{
      width:100%;
      min-height:52px;
      border:1px solid var(--line);
      border-radius:15px;
      background:#fff;
      color:var(--text);
      padding:13px 15px;
      outline:none;
      transition:var(--ease);
      box-shadow:0 1px 0 rgba(15,23,42,.02);
    }
    textarea{min-height:128px;resize:vertical}
    input:focus,select:focus,textarea:focus{
      border-color:var(--primary);
      box-shadow:0 0 0 4px rgba(37,99,235,.13);
    }
    input::placeholder,textarea::placeholder{color:#98a2b3}
    .site-container{
      width:min(calc(100% - 40px), var(--container));
      margin:0 auto;
    }
    .section{
      padding:var(--section) 0;
      position:relative;
    }
    .section-tight{padding:64px 0}
    .section-head{
      display:flex;
      justify-content:space-between;
      align-items:flex-end;
      gap:28px;
      margin-bottom:34px;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border:1px solid rgba(37,99,235,.16);
      border-radius:var(--radius-pill);
      background:rgba(239,246,255,.82);
      color:var(--primary);
      font-size:14px;
      font-weight:700;
      line-height:1.2;
      margin-bottom:14px;
    }
    .section-kicker:before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      box-shadow:0 0 0 5px rgba(37,99,235,.10);
    }
    h1,h2,h3,h4,p{margin-top:0}
    h1{
      font-size:clamp(34px,5vw,56px);
      line-height:1.16;
      letter-spacing:-.04em;
      font-weight:800;
      margin-bottom:20px;
      color:#0f172a;
    }
    h2{
      font-size:clamp(26px,3vw,38px);
      line-height:1.22;
      letter-spacing:-.03em;
      font-weight:800;
      margin-bottom:14px;
      color:#111827;
    }
    h3{
      font-size:22px;
      line-height:1.32;
      font-weight:750;
      margin-bottom:10px;
      color:#172033;
    }
    p{color:var(--muted);font-size:16px}
    .lead{
      font-size:18px;
      line-height:1.86;
      color:var(--text-soft);
      max-width:780px;
    }
    .text-link{
      color:var(--primary);
      font-weight:700;
      display:inline-flex;
      align-items:center;
      gap:7px;
    }
    .text-link:hover{text-decoration:underline;color:var(--primary-600)}
    .button,.btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:48px;
      border-radius:var(--radius-pill);
      padding:13px 22px;
      font-weight:750;
      border:1px solid transparent;
      line-height:1.1;
      transition:var(--ease);
      box-shadow:none;
      margin:0;
    }
    .button.primary,.btn-primary{
      background:linear-gradient(135deg,var(--primary),#3b82f6);
      color:#fff;
      box-shadow:0 12px 24px rgba(37,99,235,.20);
    }
    .button.primary:hover,.btn-primary:hover{
      background:linear-gradient(135deg,var(--primary-600),var(--primary));
      color:#fff;
      transform:translateY(-2px);
      box-shadow:0 16px 30px rgba(37,99,235,.28);
    }
    .button.hollow,.btn-secondary{
      background:#fff;
      color:var(--primary);
      border-color:#bfd2f8;
    }
    .button.hollow:hover,.btn-secondary:hover{
      background:var(--primary-50);
      border-color:#9dbbf5;
      color:var(--primary-600);
      transform:translateY(-2px);
    }
    .button:focus-visible,.btn:focus-visible,a:focus-visible,button:focus-visible{
      outline:3px solid rgba(37,99,235,.25);
      outline-offset:3px;
    }
    .btn-muted{
      background:#eef2f7;
      color:#475569;
      border-color:#e2e8f0;
    }
    .btn-muted:hover{background:#e2e8f0;color:#1e293b}
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.88);
      backdrop-filter:blur(16px);
      border-bottom:1px solid rgba(226,234,245,.9);
    }
    .top-bar{
      width:min(calc(100% - 40px), var(--container));
      margin:0 auto;
      padding:14px 0;
      background:transparent;
    }
    .top-bar,.top-bar ul{background:transparent}
    .brand{
      display:inline-flex;
      align-items:center;
      gap:11px;
      color:#0f172a;
      font-weight:850;
      letter-spacing:-.02em;
      font-size:18px;
      white-space:nowrap;
    }
    .brand-mark{
      width:38px;
      height:38px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      color:#fff;
      box-shadow:0 12px 26px rgba(37,99,235,.22);
      font-size:18px;
      font-weight:900;
    }
    .nav-menu{
      display:flex;
      align-items:center;
      gap:12px;
      margin:0;
      list-style:none;
    }
    .nav-menu a{
      display:inline-flex;
      align-items:center;
      min-height:42px;
      padding:0 14px;
      border-radius:var(--radius-pill);
      color:#475569;
      font-size:15px;
      font-weight:700;
    }
    .nav-menu a:hover,.nav-menu a.active{
      color:var(--primary);
      background:var(--primary-50);
    }
    .menu-toggle{
      display:none;
      width:42px;
      height:42px;
      border:1px solid var(--line);
      border-radius:14px;
      background:#fff;
      color:var(--text);
    }
    .hero{
      min-height:640px;
      padding:86px 0 70px;
      position:relative;
      overflow:hidden;
      background:
        linear-gradient(120deg,rgba(37,99,235,.08),rgba(18,184,166,.08) 56%,rgba(255,255,255,.86)),
        radial-gradient(circle at 72% 24%,rgba(37,99,235,.18),transparent 30%);
      border-bottom:1px solid var(--line);
    }
    .hero:before{
      content:"";
      position:absolute;
      inset:0;
      background-image:
        linear-gradient(rgba(37,99,235,.075) 1px,transparent 1px),
        linear-gradient(90deg,rgba(37,99,235,.075) 1px,transparent 1px);
      background-size:34px 34px;
      mask-image:linear-gradient(180deg,rgba(0,0,0,.6),transparent 80%);
      pointer-events:none;
    }
    .hero-poster{
      position:relative;
      border:1px solid rgba(191,210,248,.75);
      border-radius:34px;
      background:rgba(255,255,255,.84);
      box-shadow:0 28px 70px rgba(37,99,235,.14);
      overflow:hidden;
      padding:42px;
    }
    .hero-poster:after{
      content:"";
      position:absolute;
      width:420px;
      height:420px;
      right:-160px;
      top:-150px;
      border-radius:50%;
      background:radial-gradient(circle,rgba(37,99,235,.16),rgba(18,184,166,.08),transparent 68%);
    }
    .hero-content{
      position:relative;
      z-index:2;
      max-width:880px;
    }
    .hero-badge-row{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-bottom:22px;
    }
    .badge,.chip{
      display:inline-flex;
      align-items:center;
      gap:7px;
      border-radius:var(--radius-pill);
      padding:7px 12px;
      font-size:13px;
      font-weight:750;
      color:#1e40af;
      background:#eef6ff;
      border:1px solid rgba(37,99,235,.14);
      line-height:1.2;
    }
    .chip.green{color:#04756b;background:#ecfdf5;border-color:rgba(18,184,166,.18)}
    .chip.orange{color:#92400e;background:#fff7ed;border-color:rgba(245,158,11,.22)}
    .hero-intro{
      max-width:820px;
      font-size:18px;
      color:#334155;
      line-height:1.9;
      margin-bottom:28px;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin:26px 0 28px;
    }
    .countdown-strip{
      position:relative;
      z-index:2;
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:18px;
      align-items:center;
      padding:16px 18px;
      border-radius:22px;
      background:linear-gradient(135deg,#0f172a,#1e3a8a);
      color:#fff;
      max-width:920px;
      box-shadow:0 18px 38px rgba(15,23,42,.22);
    }
    .countdown-strip p{margin:0;color:#dbeafe;font-size:14px}
    .countdown-title{font-weight:850;white-space:nowrap}
    .time-pills{display:flex;gap:8px;flex-wrap:wrap}
    .time-pill{
      min-width:58px;
      text-align:center;
      padding:7px 9px;
      border-radius:14px;
      background:rgba(255,255,255,.13);
      border:1px solid rgba(255,255,255,.14);
      font-weight:850;
      line-height:1.2;
    }
    .time-pill span{display:block;font-size:11px;font-weight:600;color:#bfdbfe;margin-top:2px}
    .hero-metrics{
      position:relative;
      z-index:2;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
      margin-top:30px;
    }
    .metric-card{
      border:1px solid rgba(226,234,245,.95);
      border-radius:22px;
      background:rgba(255,255,255,.78);
      padding:18px;
      box-shadow:var(--shadow-soft);
      transition:var(--ease);
    }
    .metric-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#bdd0f3}
    .metric-num{
      display:block;
      font-size:36px;
      line-height:1;
      font-weight:900;
      letter-spacing:-.04em;
      color:var(--primary);
      margin-bottom:8px;
    }
    .metric-card small{color:var(--muted);font-weight:650}
    .benefit-layout{
      display:grid;
      grid-template-columns:1.08fr .92fr;
      gap:26px;
      align-items:stretch;
    }
    .card{
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:#fff;
      box-shadow:var(--shadow);
      transition:var(--ease);
      overflow:hidden;
    }
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#bdd0f3}
    .feature-large{
      padding:34px;
      min-height:100%;
      background:
        radial-gradient(circle at 90% 12%,rgba(18,184,166,.14),transparent 32%),
        linear-gradient(180deg,#fff,#f8fbff);
    }
    .feature-icon,.mini-icon{
      width:48px;
      height:48px;
      border-radius:17px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      color:#fff;
      font-size:22px;
      font-weight:900;
      box-shadow:0 12px 25px rgba(37,99,235,.22);
      margin-bottom:18px;
    }
    .feature-list{
      display:grid;
      gap:12px;
      margin:24px 0 0;
      padding:0;
      list-style:none;
    }
    .feature-list li{
      display:flex;
      align-items:flex-start;
      gap:10px;
      color:#475569;
      font-weight:650;
    }
    .check{
      flex:0 0 22px;
      width:22px;
      height:22px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:#e8fbf8;
      color:#0f9f91;
      font-size:13px;
      font-weight:900;
    }
    .mini-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:18px;
    }
    .mini-card{
      padding:24px;
      min-height:206px;
    }
    .mini-card p{font-size:15px;margin-bottom:14px}
    .mini-card .mini-icon{
      width:42px;
      height:42px;
      border-radius:15px;
      font-size:18px;
      margin-bottom:14px;
      background:linear-gradient(135deg,#dbeafe,#ecfeff);
      color:var(--primary);
      box-shadow:none;
      border:1px solid rgba(37,99,235,.12);
    }
    .status-line{
      height:7px;
      background:#edf4ff;
      border-radius:999px;
      overflow:hidden;
      margin-top:16px;
    }
    .status-line i{
      display:block;
      height:100%;
      width:72%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--primary),var(--accent));
    }
    .milestone-band{
      background:linear-gradient(180deg,#ffffff,#f3f8ff);
      border-top:1px solid var(--line);
      border-bottom:1px solid var(--line);
    }
    .timeline{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:18px;
      position:relative;
    }
    .timeline-item{
      position:relative;
      padding:24px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
    }
    .timeline-step{
      width:34px;
      height:34px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:var(--primary);
      color:#fff;
      font-weight:850;
      margin-bottom:14px;
      box-shadow:0 10px 22px rgba(37,99,235,.22);
    }
    .compare-wrap{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:24px;
      align-items:stretch;
    }
    .compare-card{
      padding:30px;
      border-radius:26px;
      border:1px solid var(--line);
      background:#fff;
      box-shadow:var(--shadow);
    }
    .compare-card.before{background:linear-gradient(180deg,#fff,#f8fafc)}
    .compare-card.after{
      border-color:rgba(37,99,235,.2);
      background:linear-gradient(180deg,#ffffff,#eff6ff);
      position:relative;
    }
    .recommend{
      position:absolute;
      top:18px;
      right:18px;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      color:#fff;
      border-radius:999px;
      padding:6px 10px;
      font-size:12px;
      font-weight:850;
    }
    .compare-list{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:14px}
    .compare-list li{
      padding:14px 14px;
      border-radius:16px;
      background:rgba(248,250,252,.9);
      border:1px solid var(--line);
      color:#475569;
      display:flex;
      gap:10px;
      align-items:flex-start;
    }
    .after .compare-list li{background:rgba(239,246,255,.86)}
    .bar{
      height:9px;
      border-radius:999px;
      background:#e5eaf3;
      overflow:hidden;
      margin-top:8px;
    }
    .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:999px}
    .news-layout{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:24px;
      align-items:start;
    }
    .news-feature,.news-list{
      border:1px solid var(--line);
      background:#fff;
      border-radius:26px;
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .news-feature{padding:30px;min-height:390px}
    .news-list{padding:10px}
    .news-meta{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
      color:var(--muted);
      font-size:13px;
      margin-bottom:14px;
    }
    .news-title{
      font-size:24px;
      font-weight:820;
      line-height:1.38;
      margin-bottom:12px;
      color:#111827;
    }
    .news-title a:hover{color:var(--primary)}
    .news-summary{font-size:16px;color:#5b6475;line-height:1.8}
    .news-item{
      display:block;
      padding:18px;
      border-radius:20px;
      border:1px solid transparent;
      transition:var(--ease);
    }
    .news-item + .news-item{border-top:1px solid var(--line)}
    .news-item:hover{
      border-color:#c8d8f3;
      background:#f8fbff;
      transform:translateX(2px);
    }
    .news-item h3{font-size:17px;margin-bottom:7px}
    .news-item p{font-size:14px;margin-bottom:8px;line-height:1.65}
    .empty-state{
      grid-column:1/-1;
      border:1px dashed #b9cff4;
      border-radius:26px;
      background:#fff;
      padding:38px;
      text-align:center;
      box-shadow:var(--shadow-soft);
    }
    .empty-icon{
      width:58px;
      height:58px;
      border-radius:20px;
      margin:0 auto 14px;
      display:grid;
      place-items:center;
      background:var(--primary-50);
      color:var(--primary);
      font-size:26px;
    }
    .open-panel{
      display:grid;
      grid-template-columns:.9fr 1.1fr;
      gap:28px;
      align-items:stretch;
      border-radius:34px;
      background:
        radial-gradient(circle at 15% 15%,rgba(18,184,166,.12),transparent 32%),
        linear-gradient(135deg,#0f172a,#1e3a8a);
      padding:34px;
      box-shadow:0 26px 60px rgba(15,23,42,.20);
      overflow:hidden;
      position:relative;
    }
    .open-panel h2,.open-panel p{color:#fff}
    .open-panel .lead{color:#dbeafe}
    .open-notes{
      display:grid;
      gap:12px;
      margin-top:26px;
    }
    .open-note{
      display:flex;
      gap:12px;
      align-items:flex-start;
      color:#e0f2fe;
      padding:14px;
      border:1px solid rgba(255,255,255,.12);
      border-radius:18px;
      background:rgba(255,255,255,.08);
    }
    .form-card{
      background:#fff;
      border-radius:26px;
      border:1px solid rgba(255,255,255,.24);
      box-shadow:0 22px 48px rgba(15,23,42,.18);
      padding:28px;
    }
    .form-card h3{margin-bottom:6px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .form-row{margin-bottom:14px}
    .form-row.full{grid-column:1/-1}
    .form-label{
      display:block;
      color:#344054;
      font-size:14px;
      font-weight:750;
      margin-bottom:7px;
    }
    .form-hint{font-size:13px;color:#7b8798;margin:10px 0 0}
    .error-text{display:none;color:#dc2626;font-size:13px;margin-top:6px}
    .voice-wall{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:18px;
    }
    .voice-card{
      padding:24px;
      border:1px solid var(--line);
      border-radius:24px;
      background:#fff;
      box-shadow:var(--shadow-soft);
      transition:var(--ease);
    }
    .voice-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
    .avatar{
      width:42px;
      height:42px;
      border-radius:50%;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg,#dbeafe,#ccfbf1);
      color:var(--primary);
      font-weight:900;
      margin-bottom:14px;
    }
    .voice-card blockquote{
      margin:0;
      color:#475569;
      line-height:1.8;
      font-size:15px;
    }
    .voice-author{
      margin-top:14px;
      color:#0f172a;
      font-weight:800;
      font-size:14px;
    }
    .faq-wrap{
      max-width:930px;
      margin:0 auto;
    }
    .accordion{
      background:transparent;
      margin:0;
    }
    .accordion-item{
      margin-bottom:14px;
      border:1px solid var(--line);
      border-radius:22px;
      overflow:hidden;
      background:#fff;
      box-shadow:var(--shadow-soft);
      transition:var(--ease);
    }
    .accordion-item:hover{border-color:#c8d8f3;box-shadow:var(--shadow)}
    .accordion-title{
      border:0 !important;
      color:#111827;
      font-size:17px;
      font-weight:800;
      padding:20px 56px 20px 22px;
      background:#fff;
      line-height:1.55;
    }
    .accordion-title:hover,.accordion-title:focus{
      background:var(--primary-50);
      color:var(--primary-600);
      outline:none;
    }
    .accordion-title:focus-visible{box-shadow:inset 0 0 0 3px rgba(37,99,235,.18)}
    .accordion-title:before{
      right:22px;
      margin-top:-12px;
      font-size:24px;
      color:var(--primary);
    }
    .accordion-content{
      border:0 !important;
      background:linear-gradient(180deg,#f8fbff,#fff);
      color:#536174;
      padding:0 22px 22px;
      line-height:1.85;
      font-size:15.5px;
    }
    .site-footer{
      background:#0f172a;
      color:#e5e7eb;
      padding:56px 0 30px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .8fr;
      gap:28px;
      align-items:start;
    }
    .footer-brand{color:#fff;margin-bottom:14px}
    .footer-brand .brand-mark{box-shadow:none}
    .site-footer p{color:#b6c2d3;font-size:15px}
    .footer-title{
      color:#fff;
      font-weight:850;
      margin-bottom:14px;
    }
    .footer-links{list-style:none;margin:0;padding:0;display:grid;gap:10px}
    .footer-links a{color:#cbd5e1;font-size:14px}
    .footer-links a:hover{color:#93c5fd}
    .copyright{
      margin-top:32px;
      padding-top:22px;
      border-top:1px solid rgba(255,255,255,.12);
      color:#94a3b8;
      font-size:13px;
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
    }
    .mobile-tabs{
      display:none;
      position:fixed;
      left:0;
      right:0;
      bottom:0;
      z-index:70;
      padding:8px 14px calc(8px + env(safe-area-inset-bottom));
      background:rgba(255,255,255,.95);
      border-top:1px solid var(--line);
      box-shadow:0 -12px 28px rgba(15,23,42,.08);
      backdrop-filter:blur(14px);
    }
    .mobile-tabs a{
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:3px;
      color:#64748b;
      font-size:12px;
      font-weight:750;
      min-height:48px;
      border-radius:14px;
    }
    .mobile-tabs a.active{color:var(--primary);background:var(--primary-50)}
    .tab-icon{font-size:18px;line-height:1}
    @media (max-width:1024px){
      :root{--section:74px}
      .hero-metrics{grid-template-columns:repeat(2,1fr)}
      .benefit-layout,.news-layout,.open-panel{grid-template-columns:1fr}
      .timeline{grid-template-columns:repeat(2,1fr)}
      .compare-wrap{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      body{padding-bottom:76px}
      .site-container,.top-bar{width:min(calc(100% - 28px), var(--container))}
      .top-bar{padding:10px 0}
      .nav-menu{display:none}
      .menu-toggle{display:inline-grid;place-items:center}
      .mobile-tabs{display:grid;grid-template-columns:1fr}
      .hero{padding:54px 0 48px;min-height:auto}
      .hero-poster{padding:26px;border-radius:26px}
      .countdown-strip{grid-template-columns:1fr;align-items:start}
      .hero-metrics,.mini-grid,.timeline,.voice-wall,.form-grid{grid-template-columns:1fr}
      .section-head{display:block}
      .feature-large,.compare-card,.news-feature,.form-card{padding:24px}
      .open-panel{padding:24px;border-radius:28px}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width:520px){
      :root{--section:56px}
      h1{font-size:34px}
      .hero-actions{display:grid}
      .button,.btn{width:100%}
      .time-pills{display:grid;grid-template-columns:repeat(2,1fr);width:100%}
      .metric-num{font-size:32px}
      .copyright{display:block}
      .copyright span{display:block;margin-bottom:8px}
    }

/* roulang page: article */
:root{
      --primary:#2563eb;
      --primary-600:#1d4ed8;
      --primary-50:#eff6ff;
      --primary-100:#dbeafe;
      --accent:#12b8a6;
      --accent-50:#ecfeff;
      --warning:#f59e0b;
      --danger:#ef4444;
      --text:#111827;
      --text-soft:#334155;
      --muted:#667085;
      --muted-2:#94a3b8;
      --bg:#f6f9fd;
      --bg-soft:#f8fafc;
      --white:#ffffff;
      --line:#e3eaf5;
      --line-strong:#cbdaf0;
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
      --radius-pill:999px;
      --shadow:0 16px 40px rgba(30,64,175,.08);
      --shadow-hover:0 22px 58px rgba(30,64,175,.13);
      --shadow-soft:0 10px 30px rgba(15,23,42,.06);
      --container:1220px;
      --read:840px;
      --section:92px;
      --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 CJK SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 10% 8%, rgba(37,99,235,.10), transparent 30%),
        radial-gradient(circle at 88% 12%, rgba(18,184,166,.11), transparent 26%),
        linear-gradient(180deg,#ffffff 0%, var(--bg) 42%, #ffffff 100%);
      line-height:1.78;
      overflow-x:hidden;
      padding-bottom:0;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    a:hover{color:var(--primary)}
    img{max-width:100%;height:auto;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    input,select,textarea{
      width:100%;
      min-height:52px;
      border:1px solid var(--line);
      border-radius:15px;
      background:#fff;
      color:var(--text);
      padding:13px 15px;
      outline:none;
      transition:var(--ease);
      box-shadow:0 1px 0 rgba(15,23,42,.02);
    }
    textarea{min-height:128px;resize:vertical}
    input:focus,select:focus,textarea:focus{
      border-color:var(--primary);
      box-shadow:0 0 0 4px rgba(37,99,235,.13);
    }
    input::placeholder,textarea::placeholder{color:#98a2b3}
    .site-container{
      width:min(calc(100% - 40px), var(--container));
      margin:0 auto;
    }
    .read-container{
      width:min(calc(100% - 40px), var(--read));
      margin:0 auto;
    }
    .section{
      padding:var(--section) 0;
      position:relative;
    }
    .section-tight{padding:64px 0}
    .section-head{
      display:flex;
      justify-content:space-between;
      align-items:flex-end;
      gap:28px;
      margin-bottom:34px;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border:1px solid rgba(37,99,235,.16);
      border-radius:var(--radius-pill);
      background:rgba(239,246,255,.82);
      color:var(--primary);
      font-size:14px;
      font-weight:700;
      line-height:1.2;
      margin-bottom:14px;
    }
    .section-kicker:before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      box-shadow:0 0 0 5px rgba(37,99,235,.10);
    }
    .lead{
      font-size:18px;
      line-height:1.86;
      color:var(--text-soft);
      max-width:780px;
    }
    .text-link{
      color:var(--primary);
      font-weight:700;
      display:inline-flex;
      align-items:center;
      gap:7px;
    }
    .text-link:hover{text-decoration:underline;color:var(--primary-600)}
    .button,.btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:48px;
      border-radius:var(--radius-pill);
      padding:13px 22px;
      font-weight:750;
      border:1px solid transparent;
      line-height:1.1;
      transition:var(--ease);
      box-shadow:none;
      margin:0;
    }
    .button.primary,.btn-primary{
      background:linear-gradient(135deg,var(--primary),#3b82f6);
      color:#fff;
      box-shadow:0 12px 24px rgba(37,99,235,.20);
    }
    .button.primary:hover,.btn-primary:hover{
      background:linear-gradient(135deg,var(--primary-600),var(--primary));
      color:#fff;
      transform:translateY(-2px);
      box-shadow:0 16px 30px rgba(37,99,235,.28);
    }
    .button.hollow,.btn-secondary{
      background:#fff;
      color:var(--primary);
      border-color:#bfd2f8;
    }
    .button.hollow:hover,.btn-secondary:hover{
      background:var(--primary-50);
      border-color:#9dbbf5;
      color:var(--primary-600);
      transform:translateY(-2px);
    }
    .button:focus-visible,.btn:focus-visible,a:focus-visible,button:focus-visible{
      outline:3px solid rgba(37,99,235,.25);
      outline-offset:3px;
    }
    .btn-muted{
      background:#eef2f7;
      color:#475569;
      border-color:#e2e8f0;
    }
    .btn-muted:hover{background:#e2e8f0;color:#1e293b}

    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.88);
      backdrop-filter:blur(16px);
      border-bottom:1px solid rgba(226,234,245,.9);
    }
    .top-bar{
      width:min(calc(100% - 40px), var(--container));
      margin:0 auto;
      padding:14px 0;
      background:transparent;
      display:flex;
      align-items:center;
      justify-content:space-between;
    }
    .top-bar,.top-bar ul{background:transparent}
    .brand{
      display:inline-flex;
      align-items:center;
      gap:11px;
      color:#0f172a;
      font-weight:850;
      letter-spacing:-.02em;
      font-size:18px;
      white-space:nowrap;
    }
    .brand:hover{color:#0f172a}
    .brand-mark{
      width:38px;
      height:38px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      color:#fff;
      box-shadow:0 12px 26px rgba(37,99,235,.22);
      font-size:18px;
      font-weight:900;
      flex:0 0 auto;
    }
    .nav-menu{
      display:flex;
      align-items:center;
      gap:12px;
      margin:0;
      list-style:none;
    }
    .nav-menu a{
      display:inline-flex;
      align-items:center;
      min-height:42px;
      padding:0 14px;
      border-radius:var(--radius-pill);
      color:#475569;
      font-size:15px;
      font-weight:700;
    }
    .nav-menu a:hover,.nav-menu a.active{
      color:var(--primary);
      background:var(--primary-50);
    }
    .menu-toggle{
      display:none;
      width:42px;
      height:42px;
      border:1px solid var(--line);
      border-radius:14px;
      background:#fff;
      color:var(--text);
    }

    .article-hero{
      padding:54px 0 36px;
      position:relative;
      overflow:hidden;
    }
    .article-hero:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(90deg,rgba(37,99,235,.08) 1px,transparent 1px),
        linear-gradient(180deg,rgba(37,99,235,.06) 1px,transparent 1px);
      background-size:42px 42px;
      mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 84%);
      pointer-events:none;
    }
    .breadcrumb-card{
      position:relative;
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:8px;
      padding:13px 16px;
      border:1px solid rgba(203,218,240,.9);
      border-radius:18px;
      background:rgba(255,255,255,.76);
      box-shadow:var(--shadow-soft);
      color:var(--muted);
      font-size:14px;
      margin-bottom:22px;
    }
    .breadcrumb-card a{color:#475569;font-weight:700}
    .breadcrumb-card a:hover{color:var(--primary)}
    .breadcrumb-card .sep{color:#a8b3c5}
    .breadcrumb-card .current{
      color:var(--primary);
      font-weight:800;
      max-width:46%;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .article-title-card{
      position:relative;
      border:1px solid rgba(227,234,245,.92);
      border-radius:var(--radius-xl);
      background:rgba(255,255,255,.88);
      box-shadow:var(--shadow);
      padding:40px;
      overflow:hidden;
    }
    .article-title-card:after{
      content:"";
      position:absolute;
      right:-80px;
      top:-110px;
      width:260px;
      height:260px;
      background:radial-gradient(circle,rgba(37,99,235,.14),transparent 68%);
      pointer-events:none;
    }
    .article-header-grid{
      position:relative;
      display:grid;
      grid-template-columns:minmax(0,1fr) 260px;
      gap:30px;
      align-items:end;
    }
    .article-labels{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-bottom:18px;
    }
    .chip,.badge-soft{
      display:inline-flex;
      align-items:center;
      gap:7px;
      border-radius:var(--radius-pill);
      padding:7px 12px;
      font-size:13px;
      font-weight:800;
      line-height:1.15;
      border:1px solid rgba(37,99,235,.14);
      background:var(--primary-50);
      color:var(--primary);
    }
    .chip.accent{
      background:var(--accent-50);
      border-color:rgba(18,184,166,.18);
      color:#0f9488;
    }
    h1{
      margin:0;
      color:var(--text);
      font-size:clamp(30px,4vw,48px);
      line-height:1.2;
      letter-spacing:-.035em;
      font-weight:850;
    }
    .article-summary{
      margin:18px 0 0;
      color:var(--text-soft);
      font-size:17px;
      line-height:1.86;
      max-width:820px;
    }
    .article-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px 18px;
      margin-top:22px;
      color:var(--muted);
      font-size:14px;
    }
    .article-meta span{
      display:inline-flex;
      align-items:center;
      gap:7px;
    }
    .mini-panel{
      border:1px solid var(--line);
      border-radius:22px;
      background:linear-gradient(180deg,#ffffff,#f8fbff);
      padding:20px;
      box-shadow:0 14px 32px rgba(37,99,235,.08);
    }
    .mini-panel-title{
      font-size:14px;
      color:var(--muted);
      font-weight:800;
      margin-bottom:12px;
    }
    .mini-score{
      display:flex;
      align-items:flex-end;
      gap:8px;
      margin-bottom:14px;
    }
    .mini-score strong{
      font-size:38px;
      line-height:1;
      color:var(--primary);
      letter-spacing:-.04em;
    }
    .mini-score span{color:var(--muted);font-size:14px}
    .mini-bars{display:grid;gap:8px}
    .mini-bar{
      height:8px;
      border-radius:999px;
      background:#e9f1ff;
      overflow:hidden;
    }
    .mini-bar i{
      display:block;
      height:100%;
      border-radius:inherit;
      background:linear-gradient(90deg,var(--primary),var(--accent));
    }

    .article-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 310px;
      gap:34px;
      align-items:start;
      padding-top:28px;
    }
    .article-main-card{
      border:1px solid rgba(227,234,245,.95);
      border-radius:var(--radius-xl);
      background:rgba(255,255,255,.94);
      box-shadow:var(--shadow);
      padding:42px;
      min-width:0;
    }
    .value-strip{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
      margin-bottom:30px;
    }
    .value-item{
      border:1px solid var(--line);
      border-radius:18px;
      background:linear-gradient(180deg,#fff,var(--bg-soft));
      padding:16px;
    }
    .value-item b{
      display:block;
      font-size:15px;
      color:var(--text);
      margin-bottom:4px;
    }
    .value-item span{
      color:var(--muted);
      font-size:13px;
      line-height:1.55;
    }

    .article-content{
      color:#1f2937;
      font-size:17px;
      line-height:1.9;
      word-break:break-word;
    }
    .article-content h2{
      position:relative;
      margin:42px 0 16px;
      padding-left:16px;
      color:#111827;
      font-size:29px;
      line-height:1.35;
      font-weight:850;
      letter-spacing:-.02em;
    }
    .article-content h2:before{
      content:"";
      position:absolute;
      left:0;
      top:.24em;
      width:5px;
      height:1.05em;
      border-radius:99px;
      background:linear-gradient(180deg,var(--primary),var(--accent));
    }
    .article-content h3{
      margin:30px 0 12px;
      color:#172033;
      font-size:22px;
      line-height:1.45;
      font-weight:800;
    }
    .article-content p{margin:0 0 20px}
    .article-content a{
      color:var(--primary);
      font-weight:700;
      text-decoration:none;
      border-bottom:1px solid rgba(37,99,235,.22);
    }
    .article-content a:hover{
      color:var(--primary-600);
      border-bottom-color:var(--primary-600);
    }
    .article-content ul,.article-content ol{
      margin:0 0 22px 1.25em;
      padding:0;
    }
    .article-content li{margin:8px 0;padding-left:4px}
    .article-content blockquote{
      margin:28px 0;
      padding:20px 22px;
      border-left:5px solid var(--primary);
      border-radius:0 18px 18px 0;
      background:linear-gradient(90deg,var(--primary-50),#fff);
      color:#334155;
      box-shadow:0 12px 28px rgba(37,99,235,.06);
    }
    .article-content img{
      border-radius:20px;
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
      margin:28px auto;
    }
    .article-content table{
      width:100%;
      border-collapse:separate;
      border-spacing:0;
      margin:26px 0;
      overflow:hidden;
      border:1px solid var(--line);
      border-radius:18px;
      background:#fff;
      box-shadow:var(--shadow-soft);
    }
    .article-content th,.article-content td{
      padding:14px 16px;
      border-bottom:1px solid var(--line);
      text-align:left;
      vertical-align:top;
    }
    .article-content th{
      background:var(--primary-50);
      color:#1e3a8a;
      font-weight:850;
    }
    .article-content tr:last-child td{border-bottom:0}
    .article-content code{
      padding:2px 6px;
      border-radius:8px;
      background:#eef2ff;
      color:#1d4ed8;
      font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace;
      font-size:.92em;
    }
    .article-content pre{
      padding:18px;
      border-radius:18px;
      background:#0f172a;
      color:#e5edf8;
      overflow:auto;
      box-shadow:var(--shadow-soft);
    }
    .article-content pre code{
      padding:0;
      background:transparent;
      color:inherit;
    }

    .empty-article{
      text-align:center;
      padding:34px 18px;
      border:1px dashed #b8c9e8;
      border-radius:22px;
      background:linear-gradient(180deg,#fff,var(--primary-50));
    }
    .empty-icon{
      width:62px;
      height:62px;
      border-radius:22px;
      margin:0 auto 14px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      color:#fff;
      font-size:28px;
      box-shadow:0 14px 28px rgba(37,99,235,.18);
    }
    .empty-article h2{
      margin:0 0 10px;
      font-size:26px;
      color:var(--text);
    }
    .empty-article p{
      margin:0 auto 18px;
      color:var(--muted);
      max-width:520px;
    }

    .article-sidebar{
      position:sticky;
      top:92px;
      display:grid;
      gap:18px;
    }
    .side-card{
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:rgba(255,255,255,.9);
      box-shadow:var(--shadow-soft);
      padding:22px;
      transition:var(--ease);
    }
    .side-card:hover{
      transform:translateY(-2px);
      box-shadow:var(--shadow);
      border-color:#c9daf6;
    }
    .side-title{
      margin:0 0 12px;
      font-size:18px;
      font-weight:850;
      color:#111827;
    }
    .side-card p{
      margin:0 0 14px;
      color:var(--muted);
      font-size:14px;
      line-height:1.72;
    }
    .quick-list{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:10px;
    }
    .quick-list a{
      display:flex;
      justify-content:space-between;
      gap:12px;
      padding:12px 13px;
      border:1px solid var(--line);
      border-radius:15px;
      background:#fff;
      color:#475569;
      font-size:14px;
      font-weight:750;
    }
    .quick-list a:hover{
      color:var(--primary);
      background:var(--primary-50);
      border-color:#bfcef0;
      transform:translateX(2px);
    }

    .related-grid{
      display:grid;
      grid-template-columns:1.08fr .92fr;
      gap:22px;
      align-items:stretch;
    }
    .related-card{
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      background:#fff;
      box-shadow:var(--shadow);
      padding:26px;
      transition:var(--ease);
      min-height:100%;
    }
    .related-card:hover{
      transform:translateY(-3px);
      box-shadow:var(--shadow-hover);
      border-color:#c5d7f4;
    }
    .related-card.feature{
      background:
        radial-gradient(circle at 90% 8%, rgba(18,184,166,.14), transparent 32%),
        linear-gradient(135deg,#ffffff,var(--primary-50));
    }
    .related-card h3{
      margin:12px 0 10px;
      font-size:22px;
      line-height:1.42;
      font-weight:850;
    }
    .related-card p{
      margin:0 0 18px;
      color:var(--text-soft);
      line-height:1.78;
    }
    .related-list{
      display:grid;
      gap:14px;
    }
    .related-mini{
      display:block;
      border:1px solid var(--line);
      border-radius:18px;
      background:#fff;
      padding:18px;
      transition:var(--ease);
    }
    .related-mini:hover{
      color:inherit;
      transform:translateY(-2px);
      box-shadow:var(--shadow-soft);
      border-color:#c5d7f4;
    }
    .related-mini strong{
      display:block;
      color:var(--text);
      font-size:16px;
      line-height:1.5;
      margin-bottom:6px;
    }
    .related-mini span{
      display:block;
      color:var(--muted);
      font-size:13px;
      line-height:1.55;
    }

    .faq-wrap{
      display:grid;
      grid-template-columns:360px minmax(0,1fr);
      gap:32px;
      align-items:start;
    }
    .accordion{
      background:transparent;
      border:0;
    }
    .accordion-item{
      margin-bottom:14px;
      border:1px solid var(--line);
      border-radius:20px;
      background:#fff;
      box-shadow:var(--shadow-soft);
      overflow:hidden;
      transition:var(--ease);
    }
    .accordion-item:hover{border-color:#c5d7f4}
    .accordion-title{
      border:0;
      color:var(--text);
      font-weight:850;
      font-size:16px;
      line-height:1.5;
      padding:20px 54px 20px 20px;
      background:#fff;
    }
    .accordion-title:hover,.accordion-title:focus{
      background:var(--primary-50);
      color:var(--primary);
    }
    .accordion-title:before{
      right:20px;
      margin-top:-10px;
      font-size:24px;
      color:var(--primary);
    }
    .is-active>.accordion-title{
      background:linear-gradient(90deg,var(--primary-50),#fff);
      color:var(--primary);
    }
    .accordion-content{
      border:0;
      border-top:1px solid var(--line);
      background:#fff;
      color:var(--text-soft);
      line-height:1.82;
      padding:18px 20px 22px;
    }

    .cta-panel{
      position:relative;
      overflow:hidden;
      border:1px solid rgba(227,234,245,.95);
      border-radius:var(--radius-xl);
      background:
        radial-gradient(circle at 12% 16%, rgba(37,99,235,.16), transparent 34%),
        radial-gradient(circle at 88% 18%, rgba(18,184,166,.14), transparent 30%),
        linear-gradient(135deg,#ffffff,#f8fbff);
      box-shadow:var(--shadow);
      padding:38px;
    }
    .cta-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:30px;
      align-items:start;
    }
    .cta-panel h2{
      margin:0 0 14px;
      font-size:34px;
      line-height:1.25;
      font-weight:850;
      letter-spacing:-.025em;
    }
    .cta-panel p{
      margin:0 0 20px;
      color:var(--text-soft);
      line-height:1.82;
      max-width:560px;
    }
    .contact-points{
      list-style:none;
      padding:0;
      margin:24px 0 0;
      display:grid;
      gap:12px;
    }
    .contact-points li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:#334155;
    }
    .contact-points i{
      width:24px;
      height:24px;
      border-radius:50%;
      display:grid;
      place-items:center;
      flex:0 0 auto;
      background:var(--accent-50);
      color:#0f9488;
      font-style:normal;
      font-weight:900;
      font-size:13px;
      margin-top:2px;
    }
    .form-card{
      border:1px solid var(--line);
      border-radius:24px;
      background:rgba(255,255,255,.88);
      padding:24px;
      box-shadow:var(--shadow-soft);
    }
    .form-card label{
      display:block;
      margin-bottom:6px;
      color:#334155;
      font-weight:800;
      font-size:14px;
    }
    .form-row{margin-bottom:14px}
    .form-help{
      color:var(--muted);
      font-size:13px;
      margin-top:10px;
      line-height:1.55;
    }
    .error-hint{
      display:none;
      margin-top:6px;
      color:var(--danger);
      font-size:13px;
    }

    .site-footer{
      margin-top:20px;
      padding:56px 0 26px;
      background:#0f172a;
      color:#dbeafe;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr .8fr .9fr;
      gap:34px;
      align-items:start;
    }
    .footer-brand{color:#fff;margin-bottom:16px}
    .footer-brand:hover{color:#fff}
    .site-footer p{
      margin:0;
      max-width:520px;
      color:#b8c7dd;
      line-height:1.78;
    }
    .footer-title{
      color:#fff;
      font-weight:850;
      margin-bottom:14px;
      font-size:16px;
    }
    .footer-links{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:10px;
    }
    .footer-links a{
      color:#b8c7dd;
      font-size:14px;
    }
    .footer-links a:hover{color:#fff;text-decoration:underline}
    .copyright{
      margin-top:34px;
      padding-top:20px;
      border-top:1px solid rgba(219,234,254,.14);
      display:flex;
      justify-content:space-between;
      gap:18px;
      flex-wrap:wrap;
      color:#8ea3bf;
      font-size:13px;
    }

    .mobile-tabbar{
      display:none;
      position:fixed;
      left:12px;
      right:12px;
      bottom:calc(10px + env(safe-area-inset-bottom));
      z-index:80;
      border:1px solid rgba(203,218,240,.92);
      border-radius:22px;
      background:rgba(255,255,255,.94);
      backdrop-filter:blur(16px);
      box-shadow:0 18px 40px rgba(15,23,42,.14);
      padding:8px;
    }
    .mobile-tabbar a{
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:3px;
      min-height:50px;
      border-radius:16px;
      color:#64748b;
      font-size:12px;
      font-weight:800;
    }
    .mobile-tabbar a.active{
      background:var(--primary-50);
      color:var(--primary);
    }
    .tab-icon{
      width:20px;
      height:20px;
      display:grid;
      place-items:center;
      font-size:17px;
      line-height:1;
    }

    @media (max-width:1024px){
      :root{--section:74px}
      .article-header-grid,
      .article-layout,
      .faq-wrap,
      .cta-grid{
        grid-template-columns:1fr;
      }
      .article-sidebar{position:static}
      .mini-panel{max-width:420px}
      .footer-grid{grid-template-columns:1fr 1fr}
      .related-grid{grid-template-columns:1fr}
    }
    @media (max-width:768px){
      body{padding-bottom:88px}
      .site-container,.read-container,.top-bar{width:min(calc(100% - 28px), var(--container))}
      .nav-menu{display:none}
      .menu-toggle{display:block}
      .mobile-tabbar{display:grid;grid-template-columns:1fr}
      .article-hero{padding:34px 0 22px}
      .article-title-card{padding:26px}
      .breadcrumb-card .current{max-width:100%}
      .article-summary{font-size:16px}
      .article-main-card{padding:26px}
      .value-strip{grid-template-columns:1fr}
      .section-head{display:block}
      .cta-panel{padding:26px}
      .cta-panel h2{font-size:28px}
      .footer-grid{grid-template-columns:1fr}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }
    @media (max-width:520px){
      :root{--section:56px}
      .brand{font-size:16px}
      .brand-mark{width:34px;height:34px;border-radius:12px}
      h1{font-size:30px}
      .article-title-card{border-radius:22px;padding:22px}
      .article-main-card{border-radius:22px;padding:22px}
      .article-content{font-size:16px;line-height:1.86}
      .article-content h2{font-size:24px}
      .article-content h3{font-size:20px}
      .article-meta{gap:8px}
      .button,.btn{width:100%}
      .related-card,.side-card,.form-card{padding:20px}
      .cta-panel{border-radius:22px}
    }