/* roulang page: index */
:root{
      --bg:#fff8f2;
      --bg-2:#fff1f6;
      --surface:#ffffff;
      --surface-soft:#fff7fb;
      --text:#24141d;
      --muted:#75646e;
      --primary:#ff5d73;
      --primary-dark:#d93a61;
      --secondary:#7c2d62;
      --accent:#f7c66b;
      --line:rgba(127,45,98,.16);
      --line-strong:rgba(127,45,98,.26);
      --radius-sm:14px;
      --radius:22px;
      --radius-lg:32px;
      --shadow:0 18px 55px rgba(36,20,29,.10);
      --shadow-hover:0 24px 70px rgba(127,29,78,.18);
      --container:1180px;
      --nav-height:76px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 10% 8%, rgba(255,93,115,.12), transparent 26%),
        radial-gradient(circle at 90% 12%, rgba(247,198,107,.18), transparent 24%),
        linear-gradient(180deg,var(--bg) 0%,#fff 45%,#fff7fb 100%);
      line-height:1.65;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer;border:0;background:none}
    ::selection{background:rgba(255,93,115,.22)}
    .container{
      width:min(100% - 40px,var(--container));
      margin-inline:auto;
    }
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      backdrop-filter:saturate(160%) blur(18px);
      background:rgba(255,248,242,.86);
      border-bottom:1px solid var(--line);
    }
    .nav-shell{
      min-height:var(--nav-height);
      display:grid;
      grid-template-columns:auto minmax(280px,1fr) auto;
      gap:18px;
      align-items:center;
    }
    .brand{
      display:inline-flex;
      align-items:center;
      gap:10px;
      font-weight:900;
      letter-spacing:-.02em;
      color:var(--secondary);
      white-space:nowrap;
    }
    .brand-mark{
      width:40px;
      height:40px;
      border-radius:16px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      box-shadow:0 12px 28px rgba(255,93,115,.28);
      font-weight:900;
    }
    .nav-search{
      position:relative;
      display:flex;
      align-items:center;
      width:100%;
      max-width:620px;
      margin-inline:auto;
    }
    .nav-search svg{
      position:absolute;
      left:18px;
      width:20px;
      height:20px;
      color:var(--muted);
      pointer-events:none;
    }
    .nav-search input{
      width:100%;
      height:48px;
      border-radius:999px;
      border:1px solid var(--line);
      outline:none;
      padding:0 112px 0 48px;
      background:rgba(255,255,255,.82);
      color:var(--text);
      box-shadow:0 8px 22px rgba(36,20,29,.05);
      transition:border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-search input:focus{
      border-color:rgba(255,93,115,.6);
      box-shadow:0 0 0 5px rgba(255,93,115,.13), 0 10px 25px rgba(36,20,29,.08);
      background:#fff;
    }
    .search-action{
      position:absolute;
      right:6px;
      height:36px;
      padding:0 18px;
      border-radius:999px;
      background:var(--text);
      color:#fff;
      font-size:14px;
      font-weight:700;
      transition:transform .2s ease, background .2s ease;
    }
    .search-action:hover{transform:translateY(-1px);background:var(--secondary)}
    .nav-links{
      display:flex;
      align-items:center;
      gap:10px;
      justify-content:flex-end;
    }
    .nav-link{
      height:42px;
      display:inline-flex;
      align-items:center;
      padding:0 18px;
      border-radius:999px;
      font-weight:800;
      color:var(--muted);
      border:1px solid transparent;
      transition:all .2s ease;
    }
    .nav-link:hover{
      color:var(--secondary);
      background:#fff;
      border-color:var(--line);
      box-shadow:0 10px 20px rgba(36,20,29,.06);
    }
    .nav-link.active{
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      box-shadow:0 12px 25px rgba(255,93,115,.24);
    }
    .menu-toggle{
      display:none;
      width:44px;
      height:44px;
      border-radius:16px;
      border:1px solid var(--line);
      background:#fff;
      color:var(--secondary);
      align-items:center;
      justify-content:center;
    }
    .top-note{
      background:linear-gradient(90deg,rgba(124,45,98,.96),rgba(255,93,115,.94));
      color:#fff;
      font-size:13px;
    }
    .top-note .container{
      display:flex;
      justify-content:space-between;
      gap:14px;
      align-items:center;
      min-height:38px;
    }
    .top-note strong{font-weight:900}
    .hero{
      padding:34px 0 18px;
    }
    .hero-band{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius-lg);
      background:
        linear-gradient(90deg,rgba(255,255,255,.92),rgba(255,240,245,.78)),
        radial-gradient(circle at 78% 40%,rgba(255,93,115,.24),transparent 35%),
        radial-gradient(circle at 18% 30%,rgba(247,198,107,.35),transparent 30%);
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      padding:34px;
    }
    .hero-band:before{
      content:"";
      position:absolute;
      inset:auto -120px -160px auto;
      width:420px;
      height:420px;
      border-radius:50%;
      background:conic-gradient(from 180deg,rgba(255,93,115,.18),rgba(247,198,107,.24),rgba(124,45,98,.12),rgba(255,93,115,.18));
      filter:blur(3px);
    }
    .hero-grid{
      position:relative;
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:28px;
      align-items:center;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(255,93,115,.10);
      color:var(--secondary);
      font-size:13px;
      font-weight:900;
      border:1px solid rgba(255,93,115,.18);
    }
    .hero h1{
      margin:14px 0 12px;
      font-size:clamp(30px,4vw,52px);
      line-height:1.08;
      letter-spacing:-.04em;
      color:var(--text);
    }
    .hero-desc{
      max-width:760px;
      color:var(--muted);
      font-size:17px;
      margin:0;
    }
    .hero-actions{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      margin-top:22px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:46px;
      padding:0 20px;
      border-radius:999px;
      font-weight:900;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
      outline:none;
    }
    .btn:focus-visible{
      box-shadow:0 0 0 5px rgba(255,93,115,.16);
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      box-shadow:0 16px 34px rgba(255,93,115,.28);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
    .btn-secondary{
      color:var(--secondary);
      background:#fff;
      border:1px solid var(--line-strong);
    }
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(255,93,115,.45);box-shadow:0 14px 28px rgba(36,20,29,.08)}
    .hero-strip{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
    }
    .metric{
      border-radius:22px;
      padding:16px;
      background:rgba(255,255,255,.72);
      border:1px solid var(--line);
      box-shadow:0 12px 26px rgba(36,20,29,.06);
    }
    .metric b{
      display:block;
      font-size:25px;
      line-height:1;
      color:var(--secondary);
      letter-spacing:-.03em;
    }
    .metric span{
      display:block;
      color:var(--muted);
      font-size:13px;
      margin-top:8px;
    }
    .quick-tags{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:16px;
    }
    .tag,.badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      border-radius:999px;
      padding:7px 11px;
      font-size:13px;
      font-weight:800;
      color:var(--secondary);
      background:#fff;
      border:1px solid var(--line);
    }
    main{overflow:hidden}
    .section{
      padding:62px 0;
    }
    .section-tight{padding:38px 0}
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:24px;
    }
    .section-kicker{
      color:var(--primary-dark);
      font-weight:900;
      font-size:13px;
      letter-spacing:.08em;
      margin-bottom:6px;
    }
    .section-title{
      font-size:clamp(24px,3vw,36px);
      line-height:1.16;
      letter-spacing:-.03em;
      margin:0;
      color:var(--text);
    }
    .section-desc{
      margin:10px 0 0;
      color:var(--muted);
      max-width:720px;
    }
    .link-more{
      flex:none;
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--secondary);
      font-weight:900;
      border-bottom:2px solid rgba(255,93,115,.28);
      padding-bottom:4px;
      transition:color .2s ease,border-color .2s ease;
    }
    .link-more:hover{color:var(--primary-dark);border-color:var(--primary)}
    .rail{
      display:flex;
      gap:16px;
      overflow-x:auto;
      padding:6px 2px 18px;
      scroll-snap-type:x mandatory;
      scrollbar-width:thin;
      scrollbar-color:rgba(124,45,98,.34) transparent;
    }
    .rail-card{
      min-width:260px;
      scroll-snap-align:start;
      border-radius:26px;
      background:#fff;
      border:1px solid var(--line);
      overflow:hidden;
      box-shadow:0 12px 30px rgba(36,20,29,.07);
      transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .rail-card:hover{
      transform:translateY(-5px);
      border-color:rgba(255,93,115,.42);
      box-shadow:var(--shadow-hover);
    }
    .cover{
      position:relative;
      height:146px;
      overflow:hidden;
      background:linear-gradient(135deg,#ff9aa8,#7c2d62);
    }
    .cover:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 28% 30%,rgba(255,255,255,.45),transparent 18%),
        radial-gradient(circle at 76% 68%,rgba(247,198,107,.40),transparent 20%),
        linear-gradient(135deg,rgba(36,20,29,.1),rgba(36,20,29,.34));
    }
    .cover .age{
      position:absolute;
      top:12px;
      left:12px;
      z-index:2;
      color:#fff;
      background:rgba(36,20,29,.58);
      border:1px solid rgba(255,255,255,.22);
      backdrop-filter:blur(8px);
      border-radius:999px;
      padding:5px 9px;
      font-size:12px;
      font-weight:900;
    }
    .cover .update{
      position:absolute;
      right:12px;
      bottom:12px;
      z-index:2;
      color:var(--text);
      background:rgba(255,255,255,.86);
      border-radius:999px;
      padding:5px 10px;
      font-size:12px;
      font-weight:900;
    }
    .rail-body{padding:16px}
    .rail-body h3{
      margin:0 0 8px;
      font-size:18px;
      line-height:1.3;
    }
    .rail-body p{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }
    .recommend-layout{
      display:grid;
      grid-template-columns:1.25fr .75fr;
      gap:20px;
      align-items:stretch;
    }
    .feature-card{
      position:relative;
      min-height:360px;
      border-radius:var(--radius-lg);
      overflow:hidden;
      background:
        linear-gradient(135deg,rgba(36,20,29,.34),rgba(124,45,98,.78)),
        radial-gradient(circle at 28% 22%,rgba(255,93,115,.5),transparent 26%),
        linear-gradient(135deg,#7c2d62,#ff5d73);
      color:#fff;
      padding:28px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      box-shadow:var(--shadow);
    }
    .feature-card:after{
      content:"";
      position:absolute;
      right:-80px;
      top:-90px;
      width:240px;
      height:240px;
      border-radius:50%;
      border:32px solid rgba(255,255,255,.10);
    }
    .feature-card h3{
      position:relative;
      margin:10px 0 10px;
      font-size:clamp(25px,3vw,42px);
      line-height:1.1;
      letter-spacing:-.03em;
      max-width:620px;
    }
    .feature-card p{
      position:relative;
      color:rgba(255,255,255,.82);
      max-width:620px;
      margin:0;
    }
    .feature-meta{
      position:relative;
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:20px;
    }
    .feature-meta span{
      border-radius:999px;
      padding:7px 11px;
      background:rgba(255,255,255,.13);
      border:1px solid rgba(255,255,255,.18);
      font-size:13px;
      font-weight:800;
    }
    .side-list{
      display:grid;
      gap:14px;
    }
    .mini-card{
      padding:18px;
      border-radius:24px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:0 12px 30px rgba(36,20,29,.06);
      transition:transform .2s ease, border-color .2s ease;
    }
    .mini-card:hover{transform:translateY(-3px);border-color:rgba(255,93,115,.42)}
    .mini-card h3{
      margin:0 0 8px;
      font-size:18px;
    }
    .mini-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }
    .partition-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
    }
    .partition-card{
      position:relative;
      min-height:178px;
      border-radius:26px;
      padding:20px;
      overflow:hidden;
      border:1px solid var(--line);
      background:#fff;
      box-shadow:0 12px 32px rgba(36,20,29,.06);
      transition:transform .2s ease, box-shadow .2s ease;
    }
    .partition-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
    .partition-card:before{
      content:"";
      position:absolute;
      inset:auto -40px -52px auto;
      width:132px;
      height:132px;
      border-radius:42px;
      transform:rotate(18deg);
      background:linear-gradient(135deg,rgba(255,93,115,.18),rgba(247,198,107,.24));
    }
    .partition-card h3{
      position:relative;
      margin:12px 0 8px;
      font-size:20px;
    }
    .partition-card p{
      position:relative;
      color:var(--muted);
      margin:0;
      font-size:14px;
    }
    .topic-grid{
      display:grid;
      grid-template-columns:1fr 1fr 1fr;
      gap:16px;
    }
    .topic-card{
      padding:22px;
      border-radius:28px;
      background:linear-gradient(180deg,#fff,rgba(255,247,251,.92));
      border:1px solid var(--line);
      box-shadow:0 12px 32px rgba(36,20,29,.06);
    }
    .topic-icon{
      width:46px;
      height:46px;
      border-radius:18px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--secondary));
      box-shadow:0 12px 24px rgba(255,93,115,.20);
      font-weight:900;
    }
    .topic-card h3{margin:16px 0 8px;font-size:20px}
    .topic-card p{margin:0;color:var(--muted);font-size:15px}
    .news-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 340px;
      gap:22px;
    }
    .news-list{
      border-radius:var(--radius-lg);
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .news-item{
      display:grid;
      grid-template-columns:96px 1fr auto;
      gap:16px;
      align-items:center;
      padding:18px 20px;
      border-bottom:1px solid var(--line);
      transition:background .2s ease;
    }
    .news-item:last-child{border-bottom:0}
    .news-item:hover{background:var(--surface-soft)}
    .news-date{
      border-radius:18px;
      background:rgba(255,93,115,.10);
      color:var(--secondary);
      text-align:center;
      padding:10px 8px;
      font-weight:900;
      font-size:13px;
    }
    .news-item h3{
      margin:0 0 5px;
      font-size:18px;
      line-height:1.35;
    }
    .news-item p{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }
    .news-arrow{
      width:34px;
      height:34px;
      border-radius:999px;
      display:grid;
      place-items:center;
      color:var(--secondary);
      background:#fff;
      border:1px solid var(--line);
      transition:all .2s ease;
    }
    .news-item:hover .news-arrow{background:var(--secondary);color:#fff}
    .recommend-panel{
      border-radius:var(--radius-lg);
      padding:22px;
      background:linear-gradient(180deg,#24141d,#4a1d3e);
      color:#fff;
      box-shadow:var(--shadow);
    }
    .recommend-panel h3{margin:0 0 14px;font-size:22px}
    .rank-list{
      display:grid;
      gap:12px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .rank-list li{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:12px;
      border-radius:18px;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.10);
    }
    .rank-list b{
      width:26px;
      height:26px;
      display:grid;
      place-items:center;
      border-radius:10px;
      background:rgba(247,198,107,.18);
      color:var(--accent);
      flex:none;
    }
    .rank-list span{display:block;font-weight:850}
    .rank-list small{display:block;color:rgba(255,255,255,.68);margin-top:3px;line-height:1.45}
    .faq-wrap{
      display:grid;
      grid-template-columns:.82fr 1.18fr;
      gap:24px;
      align-items:start;
    }
    .faq-intro{
      position:sticky;
      top:100px;
      padding:26px;
      border-radius:var(--radius-lg);
      background:linear-gradient(135deg,rgba(255,93,115,.10),rgba(247,198,107,.18));
      border:1px solid var(--line);
    }
    .faq-intro h2{margin:0 0 10px;font-size:30px;line-height:1.15}
    .faq-intro p{margin:0;color:var(--muted)}
    .accordion{
      display:grid;
      gap:12px;
    }
    .faq-item{
      border:1px solid var(--line);
      background:#fff;
      border-radius:22px;
      overflow:hidden;
      box-shadow:0 10px 26px rgba(36,20,29,.05);
    }
    .faq-question{
      width:100%;
      padding:18px 20px;
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:18px;
      text-align:left;
      color:var(--text);
      font-weight:900;
    }
    .faq-question:focus-visible{outline:4px solid rgba(255,93,115,.16);outline-offset:-4px}
    .faq-question i{
      width:28px;
      height:28px;
      border-radius:999px;
      background:rgba(255,93,115,.10);
      color:var(--secondary);
      display:grid;
      place-items:center;
      font-style:normal;
      transition:transform .2s ease, background .2s ease;
    }
    .faq-answer{
      display:none;
      padding:0 20px 18px;
      color:var(--muted);
      font-size:15px;
    }
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question i{transform:rotate(45deg);background:rgba(255,93,115,.18)}
    .cta-section{
      padding:30px 0 72px;
    }
    .cta-card{
      border-radius:36px;
      padding:32px;
      color:#fff;
      background:
        radial-gradient(circle at 18% 20%,rgba(247,198,107,.26),transparent 24%),
        linear-gradient(135deg,#7c2d62,#24141d 70%);
      box-shadow:0 26px 78px rgba(36,20,29,.22);
      display:grid;
      grid-template-columns:1fr auto;
      gap:24px;
      align-items:center;
      overflow:hidden;
      position:relative;
    }
    .cta-card:before{
      content:"";
      position:absolute;
      right:-90px;
      bottom:-120px;
      width:320px;
      height:320px;
      border-radius:50%;
      background:rgba(255,93,115,.18);
    }
    .cta-card h2{
      position:relative;
      margin:0 0 10px;
      font-size:clamp(24px,3vw,38px);
      line-height:1.14;
      letter-spacing:-.03em;
    }
    .cta-card p{
      position:relative;
      margin:0;
      color:rgba(255,255,255,.76);
      max-width:760px;
    }
    .cta-actions{
      position:relative;
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .btn-light{background:#fff;color:var(--secondary)}
    .btn-light:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(255,255,255,.18)}
    .btn-ghost{border:1px solid rgba(255,255,255,.28);color:#fff;background:rgba(255,255,255,.08)}
    .btn-ghost:hover{transform:translateY(-2px);background:rgba(255,255,255,.14)}
    .site-footer{
      background:#1d1218;
      color:rgba(255,255,255,.76);
      padding:44px 0 26px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .8fr;
      gap:28px;
      align-items:start;
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:10px;
      color:#fff;
      font-weight:900;
      font-size:20px;
      margin-bottom:12px;
    }
    .footer-brand .brand-mark{box-shadow:none}
    .site-footer p{margin:0;color:rgba(255,255,255,.66)}
    .footer-title{
      color:#fff;
      font-weight:900;
      margin-bottom:12px;
    }
    .footer-links{
      display:grid;
      gap:8px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .footer-links a{
      color:rgba(255,255,255,.68);
      transition:color .2s ease, transform .2s ease;
      display:inline-block;
    }
    .footer-links a:hover{color:#fff;transform:translateX(3px)}
    .footer-bottom{
      margin-top:32px;
      padding-top:20px;
      border-top:1px solid rgba(255,255,255,.10);
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      font-size:13px;
      color:rgba(255,255,255,.56);
    }
    .age-modal{
      position:fixed;
      inset:0;
      z-index:100;
      display:none;
      place-items:center;
      background:rgba(29,18,24,.72);
      backdrop-filter:blur(10px);
      padding:22px;
    }
    .age-modal.show{display:grid}
    .age-box{
      width:min(100%,520px);
      border-radius:30px;
      padding:28px;
      background:#fff;
      box-shadow:0 30px 90px rgba(0,0,0,.28);
      border:1px solid var(--line);
    }
    .age-box h2{margin:0 0 10px;font-size:28px}
    .age-box p{margin:0 0 18px;color:var(--muted)}
    .age-actions{display:flex;gap:12px;flex-wrap:wrap}
    @media (max-width:1024px){
      .nav-shell{grid-template-columns:auto 1fr auto}
      .nav-links{display:none}
      .menu-toggle{display:flex}
      .hero-grid,.recommend-layout,.news-layout,.faq-wrap,.cta-card{grid-template-columns:1fr}
      .hero-strip{max-width:720px}
      .partition-grid{grid-template-columns:repeat(2,1fr)}
      .topic-grid{grid-template-columns:1fr 1fr}
      .faq-intro{position:relative;top:auto}
      .cta-actions{justify-content:flex-start}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      :root{--nav-height:auto}
      .top-note .container{align-items:flex-start;flex-direction:column;padding:9px 0}
      .nav-shell{
        padding:12px 0;
        grid-template-columns:1fr auto;
      }
      .brand span:last-child{max-width:190px;overflow:hidden;text-overflow:ellipsis}
      .nav-search{
        grid-column:1 / -1;
        order:3;
        max-width:none;
      }
      .hero{padding-top:22px}
      .hero-band{padding:24px;border-radius:28px}
      .hero-strip{grid-template-columns:1fr}
      .section{padding:46px 0}
      .section-head{display:block}
      .link-more{margin-top:14px}
      .news-item{grid-template-columns:1fr auto}
      .news-date{grid-column:1 / -1;text-align:left;width:max-content}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width:520px){
      .container{width:min(100% - 26px,var(--container))}
      .brand-mark{width:36px;height:36px;border-radius:14px}
      .nav-search input{height:46px;padding-right:92px}
      .search-action{padding:0 13px}
      .hero-actions,.age-actions{flex-direction:column}
      .btn{width:100%}
      .partition-grid,.topic-grid{grid-template-columns:1fr}
      .rail-card{min-width:232px}
      .feature-card{min-height:300px;padding:22px}
      .cta-card{padding:24px;border-radius:28px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:8px}
    }