/* roulang page: index */
:root{
      --bg:#06101f;
      --bg-2:#081426;
      --panel:rgba(255,255,255,.075);
      --panel-strong:rgba(255,255,255,.105);
      --panel-soft:rgba(255,255,255,.045);
      --line:rgba(255,255,255,.15);
      --line-strong:rgba(41,211,255,.38);
      --text:#eef7ff;
      --muted:#a8b7ca;
      --muted-2:#7f91a8;
      --primary:#1e5bff;
      --cyan:#29d3ff;
      --purple:#7c5cff;
      --mint:#44e3b2;
      --amber:#ffb84d;
      --danger-soft:#ff6f9122;
      --radius-xl:32px;
      --radius-lg:24px;
      --radius-md:18px;
      --radius-sm:14px;
      --shadow:0 18px 60px rgba(0,0,0,.28);
      --glow:0 0 38px rgba(41,211,255,.18);
      --font:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font);
      color:var(--text);
      line-height:1.75;
      background:
        radial-gradient(circle at 15% 10%, rgba(30,91,255,.24), transparent 34%),
        radial-gradient(circle at 86% 18%, rgba(41,211,255,.15), transparent 30%),
        radial-gradient(circle at 70% 78%, rgba(124,92,255,.16), transparent 34%),
        linear-gradient(180deg,var(--bg),var(--bg-2) 48%,#050c18);
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      z-index:-1;
      background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(180deg, transparent, rgba(41,211,255,.035), transparent);
      background-size:42px 42px,42px 42px,100% 6px;
      mask-image:linear-gradient(180deg,rgba(0,0,0,.85),rgba(0,0,0,.35));
    }
    a{color:inherit;text-decoration:none;transition:.22s ease}
    img{max-width:100%;display:block}
    button,input,select,textarea{font-family:inherit}
    ::selection{background:rgba(41,211,255,.28);color:#fff}
    .container-xl{max-width:1220px}
    .site-header{
      position:sticky;
      top:0;
      z-index:1000;
      background:rgba(6,16,31,.76);
      backdrop-filter:blur(20px);
      border-bottom:1px solid rgba(255,255,255,.1);
      box-shadow:0 12px 40px rgba(0,0,0,.18);
    }
    .nav-primary{
      min-height:72px;
      display:flex;
      align-items:center;
      gap:22px;
      padding:12px 0;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:max-content;
      font-weight:800;
      letter-spacing:.02em;
    }
    .brand-mark{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      background:linear-gradient(145deg,rgba(30,91,255,.95),rgba(41,211,255,.36));
      border:1px solid rgba(255,255,255,.24);
      box-shadow:0 0 28px rgba(41,211,255,.24), inset 0 0 18px rgba(255,255,255,.12);
      position:relative;
    }
    .brand-mark:after{
      content:"";
      position:absolute;
      width:16px;height:16px;border-radius:50%;
      border:2px solid rgba(255,255,255,.88);
      box-shadow:0 0 12px rgba(41,211,255,.75);
    }
    .brand-text{display:flex;flex-direction:column;line-height:1.15}
    .brand-text strong{font-size:17px}
    .brand-text span{font-size:12px;color:var(--muted);font-weight:600}
    .search-wrap{
      flex:1;
      max-width:480px;
      margin-left:auto;
      position:relative;
    }
    .search-wrap i{
      position:absolute;left:16px;top:50%;transform:translateY(-50%);
      color:var(--muted);
      font-size:16px;
    }
    .search-input{
      width:100%;
      height:46px;
      border-radius:999px;
      border:1px solid var(--line);
      background:rgba(255,255,255,.055);
      color:var(--text);
      padding:0 18px 0 44px;
      outline:0;
      transition:.22s ease;
    }
    .search-input::placeholder{color:rgba(168,183,202,.78)}
    .search-input:focus{
      border-color:rgba(41,211,255,.65);
      box-shadow:0 0 0 4px rgba(41,211,255,.12), var(--glow);
      background:rgba(255,255,255,.075);
    }
    .btn-action{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      border:1px solid rgba(41,211,255,.42);
      border-radius:999px;
      padding:12px 18px;
      color:#fff;
      font-weight:700;
      background:linear-gradient(135deg,rgba(30,91,255,.95),rgba(41,211,255,.72));
      box-shadow:0 10px 30px rgba(30,91,255,.24),0 0 24px rgba(41,211,255,.14);
      transition:.24s ease;
      white-space:nowrap;
    }
    .btn-action:hover{transform:translateY(-3px);color:#fff;box-shadow:0 16px 40px rgba(41,211,255,.24)}
    .btn-ghost{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid var(--line);
      border-radius:999px;
      padding:12px 18px;
      color:var(--text);
      background:rgba(255,255,255,.055);
      font-weight:700;
      transition:.24s ease;
    }
    .btn-ghost:hover{color:#fff;border-color:rgba(41,211,255,.48);background:rgba(41,211,255,.09);transform:translateY(-3px)}
    .btn-action:focus-visible,.btn-ghost:focus-visible,.tab-link:focus-visible,.read-link:focus-visible{
      outline:3px solid rgba(41,211,255,.55);
      outline-offset:3px;
    }
    .nav-tabs-row{
      border-top:1px solid rgba(255,255,255,.075);
      min-height:52px;
      display:flex;
      align-items:center;
      overflow-x:auto;
      scrollbar-width:none;
      gap:10px;
      padding:9px 0;
    }
    .nav-tabs-row::-webkit-scrollbar{display:none}
    .tab-link{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:9px 15px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.1);
      color:var(--muted);
      background:rgba(255,255,255,.035);
      font-size:14px;
      font-weight:700;
      white-space:nowrap;
    }
    .tab-link:hover,.tab-link.active{
      color:#fff;
      border-color:rgba(41,211,255,.42);
      background:linear-gradient(135deg,rgba(30,91,255,.22),rgba(41,211,255,.11));
      box-shadow:0 0 22px rgba(41,211,255,.11);
    }
    main{position:relative}
    .section{padding:86px 0}
    .section-sm{padding:54px 0}
    .hero{
      padding:82px 0 42px;
      position:relative;
    }
    .hero-panel{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius-xl);
      border:1px solid rgba(255,255,255,.16);
      background:
        linear-gradient(135deg,rgba(255,255,255,.105),rgba(255,255,255,.04)),
        radial-gradient(circle at 78% 16%,rgba(41,211,255,.22),transparent 30%),
        radial-gradient(circle at 15% 78%,rgba(124,92,255,.18),transparent 28%);
      box-shadow:var(--shadow),var(--glow);
      backdrop-filter:blur(18px);
      padding:56px;
    }
    .hero-panel:before{
      content:"";
      position:absolute;
      inset:-1px;
      background:linear-gradient(110deg,transparent 0%,rgba(41,211,255,.13) 42%,transparent 58%);
      transform:translateX(-35%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      border:1px solid rgba(68,227,178,.32);
      border-radius:999px;
      background:rgba(68,227,178,.08);
      color:#bfffee;
      padding:7px 12px;
      font-size:13px;
      font-weight:800;
      margin-bottom:18px;
    }
    h1,h2,h3{letter-spacing:-.02em;line-height:1.18;margin:0}
    h1{
      font-size:clamp(34px,5vw,58px);
      max-width:720px;
      font-weight:900;
    }
    .hero-sub{
      color:var(--muted);
      font-size:17px;
      max-width:650px;
      margin:20px 0 28px;
    }
    .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
    .trust-tags{display:flex;gap:10px;flex-wrap:wrap}
    .tag{
      display:inline-flex;align-items:center;gap:7px;
      padding:7px 11px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.13);
      background:rgba(255,255,255,.055);
      color:#dbe8f6;
      font-size:13px;
      font-weight:700;
    }
    .tag.cyan{border-color:rgba(41,211,255,.32);color:#c6f5ff}
    .tag.mint{border-color:rgba(68,227,178,.32);color:#c9fff0}
    .tag.purple{border-color:rgba(124,92,255,.36);color:#ded8ff}
    .visual-stage{
      min-height:390px;
      position:relative;
      border-radius:30px;
      background:
        radial-gradient(circle at 50% 38%,rgba(41,211,255,.2),transparent 34%),
        linear-gradient(145deg,rgba(255,255,255,.08),rgba(255,255,255,.025));
      border:1px solid rgba(255,255,255,.14);
      overflow:hidden;
      box-shadow:inset 0 0 80px rgba(41,211,255,.06);
    }
    .visual-stage:before{
      content:"";
      position:absolute;
      inset:22px;
      border-radius:24px;
      border:1px solid rgba(41,211,255,.16);
      background-image:
        linear-gradient(rgba(41,211,255,.08) 1px,transparent 1px),
        linear-gradient(90deg,rgba(41,211,255,.08) 1px,transparent 1px);
      background-size:26px 26px;
      opacity:.85;
    }
    .scan-ring{
      position:absolute;
      left:50%;top:48%;
      width:220px;height:220px;
      transform:translate(-50%,-50%);
      border-radius:50%;
      border:1px solid rgba(41,211,255,.38);
      box-shadow:0 0 44px rgba(41,211,255,.16), inset 0 0 34px rgba(30,91,255,.12);
    }
    .scan-ring:before,.scan-ring:after{
      content:"";position:absolute;inset:34px;border-radius:50%;
      border:1px dashed rgba(255,255,255,.18);
    }
    .scan-ring:after{inset:76px;border-style:solid;background:rgba(41,211,255,.08)}
    .float-card{
      position:absolute;
      width:190px;
      border-radius:22px;
      padding:16px;
      background:rgba(7,20,38,.72);
      border:1px solid rgba(255,255,255,.16);
      backdrop-filter:blur(16px);
      box-shadow:0 16px 45px rgba(0,0,0,.28);
    }
    .float-card.one{left:24px;top:38px}
    .float-card.two{right:24px;top:92px}
    .float-card.three{left:62px;bottom:38px;width:220px}
    .float-title{font-size:13px;font-weight:800;color:#fff;margin-bottom:10px;display:flex;justify-content:space-between}
    .bar{height:8px;border-radius:999px;background:rgba(255,255,255,.09);overflow:hidden;margin:8px 0}
    .bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--cyan))}
    .status-dot{width:9px;height:9px;border-radius:50%;background:var(--mint);box-shadow:0 0 12px rgba(68,227,178,.7)}
    .stats-strip{
      margin-top:28px;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
    }
    .stat-item{
      padding:18px;
      border-radius:22px;
      background:rgba(255,255,255,.055);
      border:1px solid rgba(255,255,255,.12);
      backdrop-filter:blur(14px);
    }
    .stat-item strong{display:block;font-size:26px;line-height:1.1;margin-bottom:6px}
    .stat-item span{color:var(--muted);font-size:13px}
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:28px;
    }
    .section-title h2{font-size:clamp(26px,3.4vw,38px);font-weight:900}
    .section-title p{margin:12px 0 0;color:var(--muted);max-width:650px}
    .directory-grid{
      display:grid;
      grid-template-columns:360px 1fr;
      gap:24px;
      align-items:start;
    }
    .directory-list{
      border-radius:var(--radius-xl);
      border:1px solid var(--line);
      background:rgba(255,255,255,.055);
      padding:16px;
      box-shadow:var(--shadow);
    }
    .directory-item{
      display:grid;
      grid-template-columns:58px 1fr;
      gap:12px;
      padding:16px;
      border-radius:22px;
      border:1px solid transparent;
      transition:.24s ease;
      cursor:pointer;
      position:relative;
    }
    .directory-item:before{
      content:"";
      position:absolute;left:0;top:20px;bottom:20px;width:3px;border-radius:999px;
      background:transparent;
    }
    .directory-item:hover,.directory-item.active{
      background:rgba(41,211,255,.075);
      border-color:rgba(41,211,255,.22);
      transform:translateX(3px);
    }
    .directory-item:hover:before,.directory-item.active:before{background:var(--cyan);box-shadow:0 0 12px rgba(41,211,255,.72)}
    .num{
      width:44px;height:44px;border-radius:16px;
      display:grid;place-items:center;
      background:rgba(255,255,255,.065);
      color:#c9f7ff;
      font-weight:900;
      border:1px solid rgba(255,255,255,.13);
    }
    .directory-item h3{font-size:18px;font-weight:850;margin-bottom:5px}
    .directory-item p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}
    .topic-cards{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:18px;
    }
    .topic-card{
      min-height:210px;
      border-radius:28px;
      padding:24px;
      border:1px solid rgba(255,255,255,.14);
      background:
        linear-gradient(145deg,rgba(255,255,255,.09),rgba(255,255,255,.04)),
        radial-gradient(circle at 85% 18%,rgba(41,211,255,.14),transparent 34%);
      box-shadow:var(--shadow);
      transition:.25s ease;
      position:relative;
      overflow:hidden;
    }
    .topic-card:after{
      content:"";
      position:absolute;right:-40px;bottom:-50px;width:150px;height:150px;border-radius:50%;
      border:1px solid rgba(41,211,255,.16);
    }
    .topic-card:hover{transform:translateY(-5px);border-color:rgba(41,211,255,.35);box-shadow:0 22px 70px rgba(0,0,0,.34),var(--glow)}
    .topic-card .icon{
      width:48px;height:48px;border-radius:18px;
      display:grid;place-items:center;
      background:rgba(41,211,255,.1);
      border:1px solid rgba(41,211,255,.24);
      color:var(--cyan);
      font-size:22px;
      margin-bottom:18px;
    }
    .topic-card h3{font-size:20px;font-weight:900;margin-bottom:10px}
    .topic-card p{color:var(--muted);margin:0 0 16px;font-size:15px}
    .content-list{
      display:grid;
      gap:16px;
    }
    .article-card{
      display:grid;
      grid-template-columns:150px 1fr auto;
      gap:18px;
      align-items:center;
      border-radius:26px;
      border:1px solid rgba(255,255,255,.13);
      background:rgba(255,255,255,.06);
      padding:16px;
      transition:.24s ease;
      box-shadow:0 14px 42px rgba(0,0,0,.18);
    }
    .article-card:hover{transform:translateY(-4px);border-color:rgba(41,211,255,.34);background:rgba(255,255,255,.078)}
    .thumb{
      aspect-ratio:4/3;
      border-radius:20px;
      border:1px solid rgba(255,255,255,.14);
      background:
        radial-gradient(circle at 30% 30%,rgba(41,211,255,.35),transparent 30%),
        radial-gradient(circle at 70% 68%,rgba(124,92,255,.28),transparent 34%),
        linear-gradient(145deg,rgba(30,91,255,.18),rgba(255,255,255,.05));
      position:relative;
      overflow:hidden;
    }
    .thumb:after{
      content:"";
      position:absolute;inset:18px;
      border-radius:16px;
      border:1px solid rgba(255,255,255,.18);
      background-image:linear-gradient(90deg,rgba(255,255,255,.12) 1px,transparent 1px);
      background-size:14px 14px;
    }
    .article-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:9px}
    .badge-soft{
      display:inline-flex;align-items:center;gap:5px;
      padding:5px 9px;
      border-radius:999px;
      font-size:12px;
      font-weight:800;
      color:#d8f8ff;
      background:rgba(41,211,255,.09);
      border:1px solid rgba(41,211,255,.18);
    }
    .badge-soft.mint{color:#d8fff5;background:rgba(68,227,178,.08);border-color:rgba(68,227,178,.18)}
    .badge-soft.purple{color:#e5e0ff;background:rgba(124,92,255,.1);border-color:rgba(124,92,255,.18)}
    .badge-soft.amber{color:#ffe8bf;background:rgba(255,184,77,.09);border-color:rgba(255,184,77,.2)}
    .article-card h3{font-size:20px;font-weight:900;margin-bottom:7px}
    .article-card h3 a:hover{color:var(--cyan)}
    .article-card p{margin:0;color:var(--muted);font-size:15px}
    .read-link{
      display:inline-flex;align-items:center;gap:6px;
      color:#c9f7ff;
      font-weight:800;
      white-space:nowrap;
      padding:9px 12px;
      border-radius:999px;
      border:1px solid rgba(41,211,255,.22);
      background:rgba(41,211,255,.055);
    }
    .read-link:hover{color:#fff;background:rgba(41,211,255,.12);border-color:rgba(41,211,255,.42)}
    .recommend-row{
      display:flex;
      gap:18px;
      overflow-x:auto;
      padding:4px 4px 18px;
      scrollbar-color:rgba(41,211,255,.35) transparent;
    }
    .recommend-card{
      min-width:280px;
      max-width:340px;
      border-radius:26px;
      padding:22px;
      border:1px solid rgba(255,255,255,.13);
      background:rgba(255,255,255,.055);
      transition:.24s ease;
    }
    .recommend-card:nth-child(2n){transform:translateY(18px)}
    .recommend-card:hover{transform:translateY(-4px);border-color:rgba(41,211,255,.35);background:rgba(255,255,255,.078)}
    .recommend-card:nth-child(2n):hover{transform:translateY(12px)}
    .recommend-card h3{font-size:19px;font-weight:900;margin:14px 0 8px}
    .recommend-card p{color:var(--muted);margin:0;font-size:14px}
    .accordion{
      display:grid;
      gap:14px;
    }
    .accordion-item{
      overflow:hidden;
      border-radius:22px!important;
      border:1px solid rgba(255,255,255,.13)!important;
      background:rgba(255,255,255,.055)!important;
      color:var(--text);
      backdrop-filter:blur(14px);
    }
    .accordion-button{
      color:var(--text)!important;
      background:transparent!important;
      box-shadow:none!important;
      font-weight:850;
      padding:19px 22px;
      gap:10px;
    }
    .accordion-button:focus{box-shadow:0 0 0 4px rgba(41,211,255,.13)!important}
    .accordion-button:after{
      filter:invert(1) brightness(1.5);
      opacity:.72;
    }
    .accordion-button:not(.collapsed){
      border-bottom:1px solid rgba(41,211,255,.18);
      color:#d7fbff!important;
    }
    .accordion-body{
      color:var(--muted);
      padding:18px 22px 22px;
      line-height:1.8;
    }
    .cta-panel{
      border-radius:var(--radius-xl);
      border:1px solid rgba(41,211,255,.22);
      background:
        radial-gradient(circle at 18% 28%,rgba(41,211,255,.16),transparent 30%),
        linear-gradient(135deg,rgba(255,255,255,.1),rgba(255,255,255,.045));
      box-shadow:var(--shadow),var(--glow);
      backdrop-filter:blur(18px);
      padding:34px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
      overflow:hidden;
      position:relative;
    }
    .cta-panel:after{
      content:"";
      position:absolute;right:-70px;top:-80px;width:230px;height:230px;border-radius:50%;
      border:1px solid rgba(255,255,255,.14);
      box-shadow:inset 0 0 60px rgba(41,211,255,.08);
    }
    .cta-panel h2{font-size:30px;font-weight:900;margin-bottom:8px}
    .cta-panel p{margin:0;color:var(--muted)}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}
    .site-footer{
      margin-top:72px;
      padding:54px 0 28px;
      border-top:1px solid rgba(255,255,255,.1);
      background:rgba(3,9,18,.44);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr 1fr 1fr;
      gap:28px;
      margin-bottom:28px;
    }
    .footer-card{
      border-radius:26px;
      border:1px solid rgba(255,255,255,.12);
      background:rgba(255,255,255,.045);
      padding:22px;
    }
    .footer-card h3{font-size:17px;font-weight:900;margin-bottom:12px}
    .footer-card p,.footer-card li{color:var(--muted);font-size:14px;margin:0}
    .footer-links{list-style:none;padding:0;margin:0;display:grid;gap:9px}
    .footer-links a{color:var(--muted)}
    .footer-links a:hover{color:var(--cyan)}
    .copyright{
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      color:var(--muted-2);
      font-size:13px;
      padding-top:22px;
      border-top:1px solid rgba(255,255,255,.08);
    }
    @media (max-width: 1199px){
      .hero-panel{padding:42px}
      .visual-stage{min-height:340px}
      .directory-grid{grid-template-columns:320px 1fr}
      .article-card{grid-template-columns:130px 1fr}
      .article-card .read-link{grid-column:2;justify-self:start}
    }
    @media (max-width: 991px){
      .nav-primary{flex-wrap:wrap}
      .search-wrap{order:3;max-width:none;flex-basis:100%}
      .hero-panel{padding:32px}
      .visual-stage{margin-top:28px}
      .stats-strip{grid-template-columns:repeat(2,1fr)}
      .directory-grid{grid-template-columns:1fr}
      .topic-cards{grid-template-columns:1fr}
      .section{padding:66px 0}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width: 767px){
      .brand-text strong{font-size:15px}
      .brand-mark{width:38px;height:38px}
      .btn-action,.btn-ghost{padding:11px 15px}
      .hero{padding:54px 0 26px}
      .hero-panel{border-radius:26px;padding:24px}
      .hero-actions{flex-direction:column}
      .hero-actions a{width:100%}
      .visual-stage{min-height:280px;border-radius:24px}
      .float-card{width:160px;padding:12px}
      .float-card.two{right:12px;top:80px}
      .float-card.three{left:20px;bottom:26px;width:180px}
      .stats-strip{grid-template-columns:1fr}
      .section-head{display:block}
      .section-head .btn-ghost{margin-top:16px}
      .article-card{grid-template-columns:1fr;padding:14px}
      .article-card .read-link{grid-column:auto}
      .thumb{aspect-ratio:16/8}
      .recommend-card:nth-child(2n){transform:none}
      .recommend-card:nth-child(2n):hover{transform:translateY(-4px)}
      .cta-panel{display:block;padding:26px}
      .cta-actions{margin-top:18px;flex-direction:column}
      .cta-actions a,.cta-actions button{width:100%}
    }
    @media (max-width: 575px){
      .nav-primary{gap:12px}
      .search-input{height:44px}
      .tab-link{padding:8px 12px;font-size:13px}
      .eyebrow{font-size:12px}
      .hero-sub{font-size:15px}
      .trust-tags .tag{width:100%;justify-content:center}
      .directory-item{grid-template-columns:48px 1fr;padding:13px}
      .num{width:38px;height:38px;border-radius:14px;font-size:13px}
      .topic-card{padding:20px;border-radius:22px}
      .section{padding:52px 0}
      .section-sm{padding:38px 0}
      .cta-panel h2{font-size:24px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }

/* roulang page: category1 */
:root {
      --bg-deep: #06101f;
      --bg-panel: #081426;
      --bg-card: rgba(255, 255, 255, 0.075);
      --bg-card-strong: rgba(255, 255, 255, 0.105);
      --primary: #1e5bff;
      --cyan: #29d3ff;
      --purple: #7c5cff;
      --mint: #44e3b2;
      --amber: #ffb84d;
      --text: #f4f8ff;
      --muted: rgba(222, 233, 255, 0.72);
      --soft: rgba(222, 233, 255, 0.52);
      --border: rgba(255, 255, 255, 0.15);
      --border-bright: rgba(41, 211, 255, 0.36);
      --shadow: 0 18px 60px rgba(0, 0, 0, 0.28);
      --glow: 0 0 32px rgba(41, 211, 255, 0.18);
      --radius-lg: 32px;
      --radius-md: 24px;
      --radius-sm: 18px;
      --container: 1220px;
      --font: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      min-height: 100vh;
      font-family: var(--font);
      color: var(--text);
      background:
        radial-gradient(circle at 16% 8%, rgba(30, 91, 255, 0.24), transparent 34%),
        radial-gradient(circle at 84% 18%, rgba(41, 211, 255, 0.16), transparent 30%),
        radial-gradient(circle at 52% 82%, rgba(124, 92, 255, 0.13), transparent 34%),
        linear-gradient(180deg, var(--bg-deep), #081325 48%, #050b16 100%);
      line-height: 1.75;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: -1;
      background:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
      background-size: 44px 44px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), rgba(0,0,0,.22));
    }

    body::after {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: -1;
      background: repeating-linear-gradient(
        180deg,
        rgba(41, 211, 255, 0.025) 0,
        rgba(41, 211, 255, 0.025) 1px,
        transparent 1px,
        transparent 7px
      );
      opacity: .55;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease, box-shadow .2s ease;
    }

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

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

    .container-xl {
      max-width: var(--container);
    }

    .section {
      padding: 82px 0;
      position: relative;
    }

    .section-tight {
      padding: 58px 0;
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 28px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border: 1px solid rgba(68, 227, 178, .28);
      border-radius: 999px;
      background: rgba(68, 227, 178, .08);
      color: #bfffea;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: .02em;
    }

    h1,
    h2,
    h3,
    p {
      margin-top: 0;
    }

    h1 {
      font-size: clamp(32px, 4.2vw, 54px);
      line-height: 1.12;
      letter-spacing: -0.04em;
      font-weight: 900;
      margin-bottom: 18px;
    }

    h2 {
      font-size: clamp(25px, 3vw, 36px);
      line-height: 1.22;
      letter-spacing: -0.03em;
      font-weight: 850;
      margin-bottom: 10px;
    }

    h3 {
      font-size: 20px;
      line-height: 1.35;
      font-weight: 800;
    }

    .lead {
      color: var(--muted);
      font-size: 17px;
      max-width: 780px;
      margin-bottom: 0;
    }

    .text-soft {
      color: var(--soft);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(6, 16, 31, .78);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255,255,255,.1);
      box-shadow: 0 12px 44px rgba(0,0,0,.22);
    }

    .nav-primary {
      min-height: 72px;
      display: grid;
      grid-template-columns: auto minmax(260px, 1fr) auto;
      gap: 22px;
      align-items: center;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      min-width: 0;
    }

    .brand:hover .brand-mark {
      box-shadow: 0 0 0 7px rgba(41, 211, 255, .08), 0 0 32px rgba(41, 211, 255, .32);
      transform: rotate(-6deg) scale(1.03);
    }

    .brand-mark {
      width: 44px;
      height: 44px;
      flex: 0 0 44px;
      border-radius: 16px;
      position: relative;
      background:
        radial-gradient(circle at 68% 28%, var(--cyan), transparent 22%),
        linear-gradient(135deg, rgba(30,91,255,.9), rgba(124,92,255,.72));
      border: 1px solid rgba(255,255,255,.22);
      box-shadow: 0 0 24px rgba(41, 211, 255, .2);
      transition: .22s ease;
    }

    .brand-mark::before {
      content: "";
      position: absolute;
      inset: 10px;
      border: 2px solid rgba(255,255,255,.76);
      border-top-color: rgba(41, 211, 255, .95);
      border-radius: 50% 50% 42% 42%;
      clip-path: polygon(50% 0, 100% 24%, 86% 86%, 50% 100%, 14% 86%, 0 24%);
    }

    .brand-text {
      display: grid;
      gap: 1px;
      line-height: 1.2;
    }

    .brand-text strong {
      color: #fff;
      font-size: 17px;
      letter-spacing: -0.02em;
      white-space: nowrap;
    }

    .brand-text span {
      color: var(--soft);
      font-size: 12px;
      white-space: nowrap;
    }

    .search-wrap {
      height: 46px;
      display: flex;
      align-items: center;
      gap: 10px;
      max-width: 520px;
      width: 100%;
      justify-self: end;
      padding: 0 16px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,.13);
      background: rgba(255,255,255,.055);
      transition: .2s ease;
    }

    .search-wrap:focus-within {
      border-color: rgba(41,211,255,.55);
      box-shadow: 0 0 0 4px rgba(41,211,255,.11);
      background: rgba(255,255,255,.08);
    }

    .search-wrap i {
      color: var(--cyan);
    }

    .search-input {
      width: 100%;
      border: 0;
      outline: none;
      background: transparent;
      color: var(--text);
      font-size: 14px;
    }

    .search-input::placeholder {
      color: rgba(222,233,255,.48);
    }

    .btn-action,
    .btn-primary-custom,
    .btn-ghost,
    .read-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      padding: 0 18px;
      border-radius: 999px;
      border: 1px solid rgba(41,211,255,.34);
      font-weight: 800;
      font-size: 14px;
      cursor: pointer;
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
    }

    .btn-action,
    .btn-primary-custom {
      color: #fff;
      background: linear-gradient(135deg, rgba(30,91,255,.98), rgba(41,211,255,.82));
      box-shadow: 0 14px 34px rgba(30,91,255,.26), 0 0 24px rgba(41,211,255,.14);
    }

    .btn-ghost {
      color: var(--text);
      background: rgba(255,255,255,.065);
      border-color: rgba(255,255,255,.16);
    }

    .read-btn {
      min-height: 38px;
      padding: 0 14px;
      color: #dff9ff;
      background: rgba(41,211,255,.08);
      border-color: rgba(41,211,255,.22);
    }

    .btn-action:hover,
    .btn-primary-custom:hover,
    .btn-ghost:hover,
    .read-btn:hover {
      transform: translateY(-3px);
      border-color: rgba(41,211,255,.62);
      box-shadow: 0 18px 46px rgba(0,0,0,.28), 0 0 28px rgba(41,211,255,.18);
      color: #fff;
    }

    .btn-action:focus-visible,
    .btn-primary-custom:focus-visible,
    .btn-ghost:focus-visible,
    .read-btn:focus-visible,
    .tab-link:focus-visible,
    .form-control:focus,
    .form-select:focus {
      outline: none;
      box-shadow: 0 0 0 4px rgba(41,211,255,.18);
      border-color: rgba(41,211,255,.7);
    }

    .nav-tabs-row {
      min-height: 52px;
      display: flex;
      align-items: center;
      gap: 10px;
      overflow-x: auto;
      scrollbar-width: none;
      padding-bottom: 10px;
    }

    .nav-tabs-row::-webkit-scrollbar {
      display: none;
    }

    .tab-link {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 10px 15px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,.12);
      background: rgba(255,255,255,.045);
      color: rgba(244,248,255,.76);
      white-space: nowrap;
      font-size: 14px;
      font-weight: 750;
    }

    .tab-link:hover {
      color: #fff;
      background: rgba(255,255,255,.08);
      border-color: rgba(41,211,255,.3);
    }

    .tab-link.active {
      color: #fff;
      background: linear-gradient(135deg, rgba(30,91,255,.34), rgba(41,211,255,.13));
      border-color: rgba(41,211,255,.42);
      box-shadow: inset 0 0 22px rgba(41,211,255,.08);
    }

    .category-hero {
      padding: 54px 0 34px;
    }

    .hero-panel {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255,255,255,.16);
      background:
        linear-gradient(135deg, rgba(255,255,255,.105), rgba(255,255,255,.045)),
        radial-gradient(circle at 78% 22%, rgba(41,211,255,.18), transparent 28%),
        radial-gradient(circle at 22% 88%, rgba(124,92,255,.18), transparent 28%);
      box-shadow: var(--shadow), var(--glow);
      backdrop-filter: blur(18px);
      padding: 34px;
    }

    .hero-panel::before {
      content: "";
      position: absolute;
      right: -70px;
      top: -90px;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      border: 1px solid rgba(41,211,255,.18);
      background: radial-gradient(circle, rgba(41,211,255,.16), transparent 62%);
    }

    .breadcrumb-custom {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 18px;
      color: rgba(222,233,255,.58);
      font-size: 13px;
    }

    .breadcrumb-custom a {
      color: rgba(222,233,255,.72);
    }

    .breadcrumb-custom a:hover {
      color: var(--cyan);
    }

    .hero-copy {
      position: relative;
      max-width: 760px;
      z-index: 1;
    }

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

    .meta-chip,
    .tag,
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,.14);
      background: rgba(255,255,255,.06);
      color: rgba(244,248,255,.82);
      font-size: 13px;
      font-weight: 700;
      padding: 7px 11px;
      white-space: nowrap;
    }

    .meta-chip i,
    .tag i {
      color: var(--cyan);
    }

    .status-badge.mint {
      color: #d8fff4;
      background: rgba(68,227,178,.1);
      border-color: rgba(68,227,178,.26);
    }

    .status-badge.amber {
      color: #ffe9c4;
      background: rgba(255,184,77,.1);
      border-color: rgba(255,184,77,.28);
    }

    .toolbar {
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
      background: rgba(255,255,255,.07);
      backdrop-filter: blur(18px);
      box-shadow: var(--shadow);
      padding: 18px;
    }

    .form-control,
    .form-select {
      min-height: 48px;
      border-radius: 16px;
      color: var(--text);
      border: 1px solid rgba(255,255,255,.13);
      background-color: rgba(6,16,31,.58);
    }

    .form-control::placeholder {
      color: rgba(222,233,255,.45);
    }

    .form-select {
      background-image:
        linear-gradient(45deg, transparent 50%, rgba(41,211,255,.95) 50%),
        linear-gradient(135deg, rgba(41,211,255,.95) 50%, transparent 50%);
      background-position:
        calc(100% - 18px) 20px,
        calc(100% - 12px) 20px;
      background-size: 6px 6px, 6px 6px;
      background-repeat: no-repeat;
    }

    .form-control:focus,
    .form-select:focus {
      color: var(--text);
      background-color: rgba(6,16,31,.72);
    }

    .filter-pills {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    .filter-pill {
      border: 1px solid rgba(255,255,255,.14);
      background: rgba(255,255,255,.055);
      color: rgba(244,248,255,.76);
      border-radius: 999px;
      padding: 10px 13px;
      font-size: 13px;
      font-weight: 750;
    }

    .filter-pill:hover,
    .filter-pill.active {
      color: #fff;
      border-color: rgba(41,211,255,.38);
      background: rgba(41,211,255,.1);
    }

    .view-switch {
      display: inline-flex;
      gap: 6px;
      padding: 5px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,.12);
      background: rgba(255,255,255,.045);
    }

    .view-switch button {
      width: 38px;
      height: 38px;
      border-radius: 999px;
      border: 0;
      color: rgba(244,248,255,.72);
      background: transparent;
    }

    .view-switch button.active,
    .view-switch button:hover {
      color: #fff;
      background: rgba(41,211,255,.13);
    }

    .layout-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 330px;
      gap: 26px;
      align-items: start;
    }

    .feature-card,
    .list-card,
    .side-card,
    .recommend-card,
    .cta-panel {
      border: 1px solid var(--border);
      background: var(--bg-card);
      backdrop-filter: blur(18px);
      box-shadow: var(--shadow);
      transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease, background .22s ease;
    }

    .feature-card:hover,
    .list-card:hover,
    .side-card:hover,
    .recommend-card:hover {
      transform: translateY(-4px);
      border-color: rgba(41,211,255,.34);
      box-shadow: 0 20px 64px rgba(0,0,0,.32), 0 0 28px rgba(41,211,255,.14);
      background: var(--bg-card-strong);
    }

    .feature-card {
      display: grid;
      grid-template-columns: 260px minmax(0, 1fr);
      gap: 24px;
      border-radius: var(--radius-lg);
      padding: 22px;
      margin-bottom: 20px;
    }

    .abstract-thumb {
      position: relative;
      min-height: 210px;
      border-radius: 24px;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,.15);
      background:
        radial-gradient(circle at 28% 22%, rgba(41,211,255,.45), transparent 22%),
        radial-gradient(circle at 74% 72%, rgba(124,92,255,.42), transparent 28%),
        linear-gradient(135deg, rgba(30,91,255,.42), rgba(6,16,31,.92));
    }

    .abstract-thumb::before {
      content: "";
      position: absolute;
      inset: 22px;
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 22px;
      background:
        linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px);
      background-size: 18px 18px;
      opacity: .75;
    }

    .abstract-thumb::after {
      content: "\F632";
      font-family: "bootstrap-icons";
      position: absolute;
      right: 22px;
      bottom: 18px;
      width: 62px;
      height: 62px;
      display: grid;
      place-items: center;
      border-radius: 22px;
      color: #fff;
      font-size: 30px;
      background: rgba(255,255,255,.12);
      border: 1px solid rgba(255,255,255,.18);
      box-shadow: 0 0 28px rgba(41,211,255,.16);
    }

    .feature-body {
      min-width: 0;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .card-title-link {
      display: inline-block;
      margin-bottom: 10px;
      color: #fff;
    }

    .card-title-link:hover {
      color: var(--cyan);
    }

    .summary {
      color: var(--muted);
      font-size: 15px;
      margin-bottom: 18px;
    }

    .tag-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 18px;
    }

    .card-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
      color: var(--soft);
      font-size: 13px;
    }

    .list-stack {
      display: grid;
      gap: 14px;
    }

    .list-card {
      display: grid;
      grid-template-columns: 86px minmax(0, 1fr);
      gap: 16px;
      border-radius: var(--radius-md);
      padding: 16px;
    }

    .mini-thumb {
      width: 86px;
      min-height: 86px;
      border-radius: 20px;
      border: 1px solid rgba(255,255,255,.14);
      position: relative;
      overflow: hidden;
      background: linear-gradient(135deg, rgba(30,91,255,.4), rgba(41,211,255,.12)), #0b1a30;
    }

    .mini-thumb::before {
      content: "";
      position: absolute;
      inset: 16px;
      border-radius: 14px;
      border: 1px solid rgba(41,211,255,.28);
      transform: rotate(10deg);
    }

    .mini-thumb.icon-lock::after,
    .mini-thumb.icon-flow::after,
    .mini-thumb.icon-log::after,
    .mini-thumb.icon-review::after {
      font-family: "bootstrap-icons";
      position: absolute;
      inset: 0;
      display: grid;
      place-items: center;
      color: #dff9ff;
      font-size: 28px;
    }

    .mini-thumb.icon-lock::after { content: "\F47A"; }
    .mini-thumb.icon-flow::after { content: "\F2E9"; }
    .mini-thumb.icon-log::after { content: "\F3E2"; }
    .mini-thumb.icon-review::after { content: "\F4CB"; }

    .side-stack {
      display: grid;
      gap: 16px;
      position: sticky;
      top: 150px;
    }

    .side-card {
      border-radius: var(--radius-md);
      padding: 20px;
    }

    .side-card h3 {
      margin-bottom: 14px;
    }

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

    .index-list a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 11px 12px;
      border-radius: 16px;
      color: rgba(244,248,255,.78);
      background: rgba(255,255,255,.045);
      border: 1px solid rgba(255,255,255,.09);
      font-size: 14px;
      font-weight: 700;
    }

    .index-list a:hover {
      color: #fff;
      border-color: rgba(41,211,255,.28);
      background: rgba(41,211,255,.08);
    }

    .hot-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
    }

    .notice-box {
      padding: 15px;
      border-radius: 18px;
      border: 1px solid rgba(255,184,77,.25);
      background: rgba(255,184,77,.08);
      color: #ffedcf;
      font-size: 14px;
    }

    .recommend-scroll {
      display: grid;
      grid-auto-flow: column;
      grid-auto-columns: minmax(250px, 1fr);
      gap: 16px;
      overflow-x: auto;
      padding-bottom: 10px;
      scrollbar-width: thin;
      scrollbar-color: rgba(41,211,255,.42) rgba(255,255,255,.06);
    }

    .recommend-card {
      border-radius: var(--radius-md);
      padding: 20px;
      min-height: 190px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .recommend-card .badge-line {
      width: fit-content;
      margin-bottom: 18px;
    }

    .badge-line {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 7px 10px;
      border-radius: 999px;
      color: #cff8ff;
      font-size: 12px;
      font-weight: 850;
      background: rgba(41,211,255,.09);
      border: 1px solid rgba(41,211,255,.22);
    }

    .faq-wrap .accordion {
      display: grid;
      gap: 12px;
    }

    .faq-wrap .accordion-item {
      overflow: hidden;
      border: 1px solid rgba(255,255,255,.14);
      border-radius: 22px;
      background: rgba(255,255,255,.065);
      backdrop-filter: blur(16px);
      color: var(--text);
      box-shadow: none;
    }

    .faq-wrap .accordion-item:has(.accordion-collapse.show) {
      border-color: rgba(41,211,255,.34);
      box-shadow: 0 0 28px rgba(41,211,255,.1);
    }

    .faq-wrap .accordion-button {
      padding: 19px 22px;
      color: var(--text);
      background: transparent;
      font-size: 16px;
      font-weight: 800;
      box-shadow: none;
    }

    .faq-wrap .accordion-button:not(.collapsed) {
      color: #fff;
      background: rgba(41,211,255,.07);
    }

    .faq-wrap .accordion-button::after {
      width: 30px;
      height: 30px;
      border-radius: 999px;
      background-image: none;
      content: "+";
      display: grid;
      place-items: center;
      color: var(--cyan);
      border: 1px solid rgba(41,211,255,.28);
      transform: none;
      font-size: 20px;
      line-height: 1;
    }

    .faq-wrap .accordion-button:not(.collapsed)::after {
      content: "–";
      transform: none;
    }

    .faq-wrap .accordion-body {
      padding: 0 22px 20px;
      color: var(--muted);
      font-size: 15px;
    }

    .cta-panel {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-lg);
      padding: 30px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      align-items: center;
      gap: 24px;
      background:
        radial-gradient(circle at 12% 18%, rgba(68,227,178,.14), transparent 30%),
        linear-gradient(135deg, rgba(255,255,255,.1), rgba(255,255,255,.045));
    }

    .cta-panel::after {
      content: "";
      position: absolute;
      right: -90px;
      bottom: -90px;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(41,211,255,.18), transparent 64%);
      pointer-events: none;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      position: relative;
      z-index: 1;
    }

    .site-footer {
      padding: 58px 0 28px;
      margin-top: 34px;
      background: linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,.055));
      border-top: 1px solid rgba(255,255,255,.1);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.3fr .8fr 1fr;
      gap: 18px;
      margin-bottom: 24px;
    }

    .footer-card {
      border-radius: 24px;
      border: 1px solid rgba(255,255,255,.12);
      background: rgba(255,255,255,.055);
      padding: 22px;
    }

    .footer-card p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .footer-card h3 {
      font-size: 17px;
      margin-bottom: 14px;
    }

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

    .footer-links a {
      color: var(--muted);
      font-weight: 700;
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--cyan);
    }

    .copyright {
      display: flex;
      justify-content: space-between;
      gap: 14px;
      flex-wrap: wrap;
      padding-top: 18px;
      border-top: 1px solid rgba(255,255,255,.1);
      color: rgba(222,233,255,.54);
      font-size: 13px;
    }

    @media (max-width: 1199px) {
      .layout-grid {
        grid-template-columns: minmax(0, 1fr) 300px;
      }

      .feature-card {
        grid-template-columns: 220px minmax(0, 1fr);
      }
    }

    @media (max-width: 991px) {
      .nav-primary {
        grid-template-columns: 1fr auto;
        gap: 14px;
        padding-top: 12px;
      }

      .search-wrap {
        grid-column: 1 / -1;
        max-width: none;
        justify-self: stretch;
        order: 3;
        margin-bottom: 8px;
      }

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

      .side-stack {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

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

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

    @media (max-width: 767px) {
      .section {
        padding: 58px 0;
      }

      .category-hero {
        padding: 34px 0 24px;
      }

      .hero-panel {
        padding: 24px;
        border-radius: 26px;
      }

      .section-head {
        display: block;
      }

      .section-head .lead {
        margin-top: 10px;
      }

      .btn-action {
        padding: 0 14px;
      }

      .brand-text strong {
        font-size: 15px;
      }

      .brand-text span {
        display: none;
      }

      .nav-tabs-row {
        margin-inline: -12px;
        padding-inline: 12px;
      }

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

      .abstract-thumb {
        min-height: 180px;
      }

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

      .mini-thumb {
        width: 100%;
        min-height: 120px;
      }

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

      .recommend-scroll {
        grid-auto-columns: 82%;
      }

      .cta-panel {
        grid-template-columns: 1fr;
        padding: 24px;
      }

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

    @media (max-width: 575px) {
      body::before {
        opacity: .45;
      }

      .nav-primary {
        grid-template-columns: 1fr;
      }

      .btn-action {
        width: 100%;
      }

      .search-wrap {
        min-width: 0;
      }

      .toolbar {
        padding: 14px;
      }

      .filter-pills {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 4px;
        scrollbar-width: none;
      }

      .filter-pills::-webkit-scrollbar {
        display: none;
      }

      .filter-pill {
        white-space: nowrap;
      }

      .hero-meta {
        gap: 8px;
      }

      .meta-chip {
        font-size: 12px;
      }

      .cta-actions .btn-primary-custom,
      .cta-actions .btn-ghost {
        width: 100%;
      }

      .copyright {
        display: grid;
      }
    }