/* roulang page: index */
:root{
      --ink:#10231F;
      --ink-2:#14352E;
      --ink-3:#1B443B;
      --mint:#20C997;
      --mint-2:#22D3A6;
      --mint-3:#16A37F;
      --amber:#F59E0B;
      --bg:#F6F3EC;
      --paper:#FBFAF6;
      --white:#FFFFFF;
      --text:#2D332F;
      --muted:#6B746E;
      --line:#E3DED4;
      --line-strong:#D0C8B9;
      --soft:#ECF8F3;
      --danger:#B91C1C;
      --shadow:0 18px 50px rgba(16,35,31,.08);
      --shadow-strong:0 24px 70px rgba(16,35,31,.14);
      --radius-lg:24px;
      --radius-md:18px;
      --radius-sm:14px;
      --side:248px;
      --ease:180ms ease;
      --container:1220px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
      background:
        radial-gradient(circle at 88% 4%, rgba(32,201,151,.14), transparent 34%),
        linear-gradient(180deg, #F8F5EF 0%, var(--bg) 54%, #F2EFE8 100%);
      color:var(--text);
      line-height:1.78;
      font-size:16px;
      padding-bottom:92px;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{border:0;background:none;cursor:pointer}
    ::selection{background:rgba(32,201,151,.24);color:var(--ink)}
    :focus-visible{
      outline:3px solid rgba(32,201,151,.38);
      outline-offset:3px;
      border-radius:12px;
    }

    .site-shell{min-height:100vh}
    .sidebar{
      position:fixed;
      left:0;top:0;bottom:0;
      width:var(--side);
      background:
        linear-gradient(180deg, rgba(32,201,151,.08), transparent 28%),
        var(--ink);
      color:#EAF8F2;
      z-index:50;
      padding:26px 18px;
      display:flex;
      flex-direction:column;
      border-right:1px solid rgba(255,255,255,.12);
      box-shadow:14px 0 40px rgba(16,35,31,.16);
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-height:54px;
      padding:8px 8px 18px;
      border-bottom:1px solid rgba(255,255,255,.12);
    }
    .brand-mark{
      width:42px;height:42px;border-radius:15px;
      display:grid;place-items:center;
      color:var(--ink);
      background:linear-gradient(135deg,var(--mint-2),#B9F6DD);
      box-shadow:0 12px 28px rgba(32,201,151,.24);
      font-weight:900;
      letter-spacing:-.04em;
    }
    .brand-text strong{
      display:block;
      font-size:16px;
      line-height:1.28;
      letter-spacing:.01em;
    }
    .brand-text span{
      display:inline-flex;
      margin-top:4px;
      font-size:12px;
      color:#A9C8BD;
      border:1px solid rgba(255,255,255,.14);
      border-radius:999px;
      padding:2px 8px;
    }
    .side-nav{
      margin-top:26px;
      display:grid;
      gap:8px;
    }
    .nav-link{
      min-height:46px;
      display:flex;
      align-items:center;
      gap:11px;
      padding:0 14px;
      border-radius:999px;
      color:#CDE2DA;
      font-size:15px;
      position:relative;
      transition:background-color var(--ease),color var(--ease),transform var(--ease);
    }
    .nav-link:hover{
      background:rgba(255,255,255,.08);
      color:#fff;
      transform:translateX(2px);
    }
    .nav-link.active{
      color:#08231D;
      background:linear-gradient(135deg,var(--mint-2),#D6FFEf);
      font-weight:700;
    }
    .nav-ico{
      width:20px;height:20px;display:grid;place-items:center;
      font-size:16px;flex:0 0 auto;
    }
    .side-spacer{flex:1}
    .side-status{
      border:1px solid rgba(255,255,255,.12);
      background:rgba(255,255,255,.05);
      border-radius:20px;
      padding:16px;
    }
    .status-dot{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:#DDF8EE;
      font-size:13px;
      font-weight:700;
    }
    .status-dot::before{
      content:"";
      width:8px;height:8px;border-radius:50%;
      background:var(--mint-2);
      box-shadow:0 0 0 6px rgba(34,211,166,.12);
    }
    .side-status p{
      margin:10px 0 14px;
      color:#A9C8BD;
      font-size:13px;
      line-height:1.65;
    }

    .mobile-bar{
      display:none;
      position:fixed;
      top:0;left:0;right:0;
      height:64px;
      z-index:60;
      background:rgba(16,35,31,.96);
      color:#fff;
      align-items:center;
      justify-content:space-between;
      padding:0 18px;
      border-bottom:1px solid rgba(255,255,255,.12);
      backdrop-filter:saturate(1.2) blur(12px);
    }
    .mobile-logo{display:flex;align-items:center;gap:10px;font-weight:800}
    .mobile-logo .brand-mark{width:36px;height:36px;border-radius:13px;font-size:14px}
    .menu-btn{
      width:44px;height:44px;border-radius:14px;
      display:grid;place-items:center;
      color:#fff;
      border:1px solid rgba(255,255,255,.16);
      transition:background-color var(--ease),transform var(--ease);
    }
    .menu-btn:hover{background:rgba(255,255,255,.08)}
    .menu-btn:active{transform:scale(.96)}
    .drawer-mask{
      position:fixed;inset:0;
      background:rgba(6,16,14,.55);
      z-index:55;
      opacity:0;visibility:hidden;
      transition:opacity var(--ease),visibility var(--ease);
    }
    body.drawer-open .drawer-mask{opacity:1;visibility:visible}

    .main{
      margin-left:var(--side);
      min-width:0;
    }
    .container{
      width:min(var(--container), calc(100% - 80px));
      margin:0 auto;
    }
    .section{padding:92px 0}
    .section.tight{padding:72px 0}
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:30px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--ink-2);
      font-size:13px;
      font-weight:800;
      letter-spacing:.02em;
      background:rgba(32,201,151,.12);
      border:1px solid rgba(32,201,151,.24);
      border-radius:999px;
      padding:7px 12px;
    }
    .eyebrow::before{
      content:"";
      width:7px;height:7px;border-radius:50%;
      background:var(--mint);
    }
    h1,h2,h3,p{margin-top:0}
    h1{
      font-size:clamp(32px,4.35vw,56px);
      line-height:1.12;
      letter-spacing:-.04em;
      color:var(--ink);
      margin-bottom:20px;
      font-weight:850;
    }
    h2{
      font-size:clamp(25px,2.8vw,36px);
      line-height:1.24;
      color:var(--ink);
      letter-spacing:-.025em;
      margin:10px 0 0;
      font-weight:820;
    }
    h3{
      font-size:21px;
      line-height:1.35;
      color:var(--ink);
      margin-bottom:10px;
      font-weight:780;
    }
    .lead{
      font-size:18px;
      line-height:1.86;
      color:#4A554F;
      max-width:710px;
      margin-bottom:26px;
    }
    .muted{color:var(--muted)}
    .btn{
      min-height:46px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      padding:0 20px;
      border-radius:999px;
      font-weight:800;
      font-size:15px;
      transition:transform var(--ease),background-color var(--ease),border-color var(--ease),box-shadow var(--ease),color var(--ease);
      white-space:nowrap;
    }
    .btn-primary{
      background:var(--mint);
      color:#06231D;
      box-shadow:0 12px 26px rgba(32,201,151,.24);
    }
    .btn-primary:hover{
      background:var(--mint-3);
      color:#fff;
      transform:translateY(-2px);
      box-shadow:0 18px 36px rgba(22,163,127,.25);
    }
    .btn-secondary{
      background:rgba(255,255,255,.72);
      color:var(--ink);
      border:1px solid #C9D8D1;
    }
    .btn-secondary:hover{
      background:#ECF8F3;
      border-color:rgba(32,201,151,.62);
      transform:translateY(-2px);
    }
    .btn-dark{
      background:rgba(255,255,255,.1);
      color:#fff;
      border:1px solid rgba(255,255,255,.2);
    }
    .btn-dark:hover{background:rgba(255,255,255,.16);transform:translateY(-2px)}
    .btn:active{transform:translateY(0) scale(.98)}

    .hero{
      min-height:680px;
      padding:70px 0 92px;
      position:relative;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:1.02fr .98fr;
      gap:46px;
      align-items:center;
    }
    .hero-copy{position:relative;z-index:2}
    .hero-copy .lead{margin-bottom:24px}
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin:26px 0 22px;
    }
    .trust-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:7px;
      border-radius:999px;
      padding:7px 11px;
      font-size:13px;
      color:var(--ink-2);
      background:#fff;
      border:1px solid var(--line);
      box-shadow:0 8px 20px rgba(16,35,31,.04);
    }
    .tag.mint{background:#EAF9F3;border-color:rgba(32,201,151,.25)}
    .tag.amber{background:#FFF7E8;border-color:rgba(245,158,11,.26)}
    .tag::before{
      content:"";
      width:6px;height:6px;border-radius:50%;
      background:var(--mint);
    }
    .tag.amber::before{background:var(--amber)}
    .hero-panel{
      position:relative;
      background:linear-gradient(180deg,#173B33,#10231F);
      border:1px solid rgba(255,255,255,.12);
      border-radius:30px;
      padding:20px;
      box-shadow:var(--shadow-strong);
      overflow:hidden;
    }
    .hero-panel::before{
      content:"";
      position:absolute;inset:0;
      background:
        linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
      background-size:28px 28px;
      mask-image:linear-gradient(180deg,rgba(0,0,0,.75),transparent 86%);
      pointer-events:none;
    }
    .console-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      position:relative;
      z-index:1;
      margin-bottom:16px;
    }
    .traffic{display:flex;gap:7px}
    .traffic i{width:10px;height:10px;border-radius:50%;display:block}
    .traffic i:nth-child(1){background:#FF6B6B}
    .traffic i:nth-child(2){background:#F59E0B}
    .traffic i:nth-child(3){background:#20C997}
    .path-pill{
      color:#BDEBDD;
      font-size:12px;
      font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
      border:1px solid rgba(255,255,255,.12);
      border-radius:999px;
      padding:5px 10px;
      background:rgba(255,255,255,.05);
    }
    .directory-board{
      position:relative;z-index:1;
      display:grid;
      gap:14px;
    }
    .tree-card,.index-card,.module-card{
      border-radius:22px;
      border:1px solid rgba(255,255,255,.12);
      background:rgba(255,255,255,.065);
      padding:18px;
      color:#EAF8F2;
    }
    .tree-row{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding:10px 0;
      border-bottom:1px dashed rgba(255,255,255,.12);
      font-size:14px;
    }
    .tree-row:last-child{border-bottom:0}
    .tree-name{
      display:flex;align-items:center;gap:10px;
      font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
      color:#D9FFF2;
    }
    .tree-name::before{
      content:"";
      width:9px;height:9px;border-radius:3px;
      background:var(--mint-2);
      box-shadow:0 0 0 5px rgba(34,211,166,.1);
    }
    .state{
      font-size:12px;
      color:#08231D;
      background:#B9F6DD;
      border-radius:999px;
      padding:4px 9px;
      font-weight:800;
      white-space:nowrap;
    }
    .index-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:10px;
      margin-top:14px;
    }
    .mini-stat{
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.1);
      border-radius:16px;
      padding:13px;
    }
    .mini-stat b{display:block;font-size:22px;color:#B9F6DD;line-height:1.1}
    .mini-stat span{font-size:12px;color:#A9C8BD}
    .module-card{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:12px;
    }
    .module-node{
      border-radius:16px;
      padding:14px;
      background:#FBFAF6;
      color:var(--ink);
      border:1px solid rgba(255,255,255,.2);
    }
    .module-node span{display:block;font-size:12px;color:var(--muted)}
    .module-node strong{display:block;font-size:15px;margin-top:4px}

    .feature-wrap{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:34px;
      align-items:center;
    }
    .step-line{
      position:relative;
      padding:18px 0 18px 24px;
    }
    .step-line::before{
      content:"";
      position:absolute;
      left:7px;top:28px;bottom:28px;
      width:2px;
      background:linear-gradient(var(--mint),rgba(32,201,151,.08));
    }
    .step-point{
      position:relative;
      margin-bottom:22px;
      padding-left:22px;
      color:var(--muted);
      font-size:15px;
    }
    .step-point::before{
      content:"";
      position:absolute;left:-21px;top:8px;
      width:12px;height:12px;border-radius:50%;
      background:var(--mint);
      border:4px solid #DFF8EE;
    }
    .feature-stack{
      display:grid;
      gap:18px;
    }
    .feature-card{
      background:var(--white);
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      padding:26px;
      box-shadow:var(--shadow);
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:18px;
      align-items:start;
      transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
    }
    .feature-card:nth-child(2){transform:translateX(22px)}
    .feature-card:nth-child(3){transform:translateX(44px)}
    .feature-card:hover{
      border-color:rgba(32,201,151,.48);
      box-shadow:var(--shadow-strong);
      transform:translateY(-3px);
    }
    .feature-card:nth-child(2):hover{transform:translateX(22px) translateY(-3px)}
    .feature-card:nth-child(3):hover{transform:translateX(44px) translateY(-3px)}
    .num{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      background:var(--ink);
      color:#B9F6DD;
      font-weight:900;
      font-size:14px;
    }
    .feature-card p{margin:0;color:var(--muted);font-size:15px;line-height:1.7}
    .badge{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:28px;
      padding:4px 10px;
      border-radius:999px;
      font-size:12px;
      font-weight:800;
      color:var(--ink-2);
      background:#EAF9F3;
      border:1px solid rgba(32,201,151,.24);
      white-space:nowrap;
    }
    .badge.time{background:#F4F0E8;border-color:var(--line);color:var(--muted)}
    .badge.warn{background:#FFF7E8;border-color:rgba(245,158,11,.28);color:#7A4B00}

    .demo{
      background:
        linear-gradient(135deg,rgba(16,35,31,.96),rgba(20,53,46,.96)),
        radial-gradient(circle at 20% 10%,rgba(32,201,151,.28),transparent 28%);
      color:#EAF8F2;
      border-radius:34px;
      padding:34px;
      box-shadow:var(--shadow-strong);
      border:1px solid rgba(255,255,255,.12);
    }
    .demo h2{color:#fff}
    .demo .muted{color:#B4CCC3}
    .demo-grid{
      display:grid;
      grid-template-columns:1fr 120px 1fr;
      gap:22px;
      align-items:center;
      margin-top:28px;
    }
    .config-panel,.preview-panel{
      border-radius:24px;
      border:1px solid rgba(255,255,255,.12);
      background:rgba(255,255,255,.055);
      padding:22px;
    }
    .config-item{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding:13px 0;
      border-bottom:1px dashed rgba(255,255,255,.12);
      font-size:14px;
    }
    .config-item:last-child{border-bottom:0}
    .config-item span{color:#B4CCC3}
    .flow{
      display:grid;
      gap:12px;
      justify-items:center;
    }
    .flow-node{
      width:100%;
      min-height:44px;
      display:grid;place-items:center;
      border-radius:999px;
      background:#EAF9F3;
      color:var(--ink);
      font-weight:900;
      font-size:13px;
      position:relative;
    }
    .flow-node:not(:last-child)::after{
      content:"";
      position:absolute;
      left:50%;top:100%;
      width:2px;height:12px;
      background:rgba(34,211,166,.8);
    }
    .page-preview{
      background:#FBFAF6;
      color:var(--text);
      border-radius:20px;
      padding:18px;
    }
    .preview-title{
      height:18px;width:74%;
      border-radius:999px;
      background:var(--ink);
      margin-bottom:12px;
    }
    .preview-line{
      height:9px;border-radius:999px;
      background:#E3DED4;
      margin:9px 0;
    }
    .preview-line.short{width:66%}
    .preview-list{
      display:grid;
      gap:9px;
      margin-top:18px;
    }
    .preview-list i{
      height:34px;border-radius:12px;
      background:#ECF8F3;
      border:1px solid rgba(32,201,151,.2);
    }

    .proof-grid{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:22px;
      align-items:stretch;
    }
    .metric-strip{
      background:var(--white);
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      padding:24px;
      box-shadow:var(--shadow);
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
    }
    .metric{
      padding:18px;
      border-radius:18px;
      background:var(--paper);
      border:1px solid var(--line);
    }
    .metric b{
      display:block;
      color:var(--ink);
      font-size:30px;
      letter-spacing:-.04em;
      line-height:1.1;
    }
    .metric span{font-size:13px;color:var(--muted)}
    .delivery-card{
      background:var(--paper);
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      padding:26px;
      box-shadow:var(--shadow);
    }
    .delivery-list{
      list-style:none;
      padding:0;margin:18px 0 0;
      display:grid;gap:12px;
    }
    .delivery-list li{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:12px;
      border-radius:16px;
      background:#fff;
      border:1px solid var(--line);
    }
    .delivery-list i{
      width:24px;height:24px;border-radius:50%;
      background:var(--mint);
      color:#05231D;
      display:grid;place-items:center;
      font-style:normal;
      font-size:12px;
      font-weight:900;
      flex:0 0 auto;
      margin-top:2px;
    }
    .env-badges{
      margin-top:22px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }

    .content-section{
      background:rgba(255,255,255,.38);
      border-top:1px solid rgba(227,222,212,.72);
      border-bottom:1px solid rgba(227,222,212,.72);
    }
    .post-list{
      display:grid;
      gap:16px;
    }
    .post-card{
      display:grid;
      grid-template-columns:1fr auto;
      gap:18px;
      align-items:center;
      background:var(--white);
      border:1px solid var(--line);
      border-radius:22px;
      padding:22px;
      box-shadow:0 12px 34px rgba(16,35,31,.055);
      transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
    }
    .post-card:hover{
      transform:translateY(-3px);
      border-color:rgba(32,201,151,.48);
      box-shadow:var(--shadow);
    }
    .post-card h3{
      font-size:20px;
      margin:8px 0 8px;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
      transition:color var(--ease);
    }
    .post-card:hover h3{color:var(--mint-3)}
    .post-card p{
      margin:0;
      color:var(--muted);
      font-size:15px;
      line-height:1.7;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .post-meta{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
    }
    .post-action{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--ink);
      font-weight:900;
      transition:color var(--ease),transform var(--ease);
      white-space:nowrap;
    }
    .post-card:hover .post-action{
      color:var(--mint-3);
      transform:translateX(4px);
    }
    .empty-state{
      background:var(--white);
      border:1px dashed rgba(32,201,151,.45);
      border-radius:var(--radius-lg);
      padding:34px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:22px;
      box-shadow:var(--shadow);
    }
    .empty-icon{
      width:56px;height:56px;border-radius:20px;
      display:grid;place-items:center;
      background:#ECF8F3;
      color:var(--ink);
      font-size:26px;
      flex:0 0 auto;
    }
    .empty-state h3{margin-bottom:4px}
    .empty-state p{margin:0;color:var(--muted)}

    .faq-grid{
      display:grid;
      grid-template-columns:.8fr 1.2fr;
      gap:30px;
      align-items:start;
    }
    .faq-note{
      position:sticky;
      top:24px;
      background:var(--ink);
      color:#EAF8F2;
      border-radius:var(--radius-lg);
      padding:28px;
      box-shadow:var(--shadow-strong);
      border:1px solid rgba(255,255,255,.12);
    }
    .faq-note p{color:#B4CCC3;margin-bottom:0}
    .faq-list{display:grid;gap:12px}
    details{
      background:var(--white);
      border:1px solid var(--line);
      border-radius:18px;
      padding:0;
      overflow:hidden;
      transition:border-color var(--ease),box-shadow var(--ease);
    }
    details[open]{
      border-color:rgba(32,201,151,.5);
      box-shadow:0 14px 34px rgba(16,35,31,.07);
    }
    summary{
      list-style:none;
      cursor:pointer;
      min-height:58px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:16px 20px;
      color:var(--ink);
      font-weight:850;
      font-size:17px;
    }
    summary::-webkit-details-marker{display:none}
    summary::after{
      content:"+";
      width:28px;height:28px;border-radius:50%;
      display:grid;place-items:center;
      background:#ECF8F3;
      color:var(--ink);
      font-weight:900;
      flex:0 0 auto;
      transition:transform var(--ease),background-color var(--ease);
    }
    details[open] summary::after{
      content:"−";
      background:var(--mint);
    }
    .faq-answer{
      padding:0 20px 20px;
      border-left:4px solid var(--mint);
      margin:0 20px 20px;
      color:var(--muted);
      font-size:15px;
      line-height:1.78;
    }

    .contact-wrap{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:26px;
      align-items:stretch;
    }
    .contact-form,.check-card{
      background:var(--white);
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      padding:28px;
      box-shadow:var(--shadow);
    }
    .form-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:16px;
      margin-top:22px;
    }
    .field.full{grid-column:1/-1}
    label{
      display:block;
      font-weight:800;
      color:var(--ink);
      margin-bottom:8px;
      font-size:14px;
    }
    .required{color:var(--amber)}
    input,select,textarea{
      width:100%;
      border:1px solid var(--line);
      background:#fff;
      border-radius:14px;
      min-height:48px;
      padding:12px 14px;
      color:var(--text);
      transition:border-color var(--ease),box-shadow var(--ease),background-color var(--ease);
    }
    textarea{min-height:116px;resize:vertical}
    input:hover,select:hover,textarea:hover{border-color:#C9D8D1}
    input:focus,select:focus,textarea:focus{
      outline:0;
      border-color:var(--mint);
      box-shadow:0 0 0 4px rgba(32,201,151,.14);
    }
    .form-tip{
      margin-top:14px;
      background:#ECF8F3;
      border:1px solid rgba(32,201,151,.22);
      color:var(--ink-2);
      border-radius:16px;
      padding:12px 14px;
      font-size:14px;
    }
    .check-list{
      list-style:none;
      padding:0;margin:18px 0 0;
      display:grid;gap:13px;
    }
    .check-list li{
      display:flex;gap:12px;align-items:flex-start;
      padding-bottom:13px;
      border-bottom:1px dashed var(--line);
    }
    .check-list li:last-child{border-bottom:0}
    .check-list i{
      width:24px;height:24px;border-radius:9px;
      display:grid;place-items:center;
      background:var(--ink);
      color:#B9F6DD;
      font-style:normal;
      font-size:13px;
      flex:0 0 auto;
      margin-top:2px;
    }

    .footer{
      padding:46px 0 34px;
      border-top:1px solid var(--line);
      background:rgba(251,250,246,.72);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1fr auto;
      gap:24px;
      align-items:center;
    }
    .footer-brand strong{
      color:var(--ink);
      font-size:18px;
      display:block;
      margin-bottom:6px;
    }
    .footer-brand p{margin:0;color:var(--muted);font-size:14px}
    .footer-links{
      display:flex;
      gap:16px;
      flex-wrap:wrap;
      justify-content:flex-end;
      font-size:14px;
    }
    .footer-links a{
      color:var(--muted);
      transition:color var(--ease);
    }
    .footer-links a:hover{color:var(--mint-3);text-decoration:underline;text-underline-offset:4px}
    .copyright{
      margin-top:22px;
      padding-top:18px;
      border-top:1px solid var(--line);
      color:var(--muted);
      font-size:13px;
      display:flex;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;
    }

    .fixed-cta{
      position:fixed;
      left:calc(var(--side) + 24px);
      right:24px;
      bottom:18px;
      z-index:45;
      min-height:70px;
      background:rgba(16,35,31,.96);
      color:#EAF8F2;
      border:1px solid rgba(255,255,255,.14);
      border-radius:24px;
      box-shadow:0 18px 60px rgba(16,35,31,.24);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:14px 18px 14px 22px;
      backdrop-filter:saturate(1.2) blur(12px);
    }
    .fixed-cta strong{display:block;line-height:1.3}
    .fixed-cta span{font-size:13px;color:#A9C8BD}
    .fixed-actions{display:flex;gap:10px;flex:0 0 auto}

    @media (max-width:1199px){
      :root{--side:220px}
      .container{width:min(100% - 56px,1120px)}
      .hero-grid{gap:30px}
      .metric-strip{grid-template-columns:repeat(2,1fr)}
      .feature-card:nth-child(2),.feature-card:nth-child(3){transform:none}
      .feature-card:nth-child(2):hover,.feature-card:nth-child(3):hover{transform:translateY(-3px)}
    }
    @media (max-width:991px){
      body{padding-top:64px}
      .mobile-bar{display:flex}
      .sidebar{
        width:286px;
        transform:translateX(-105%);
        transition:transform 220ms ease;
      }
      body.drawer-open .sidebar{transform:translateX(0)}
      .main{margin-left:0}
      .container{width:min(100% - 40px,860px)}
      .hero{min-height:auto;padding:50px 0 72px}
      .hero-grid,.feature-wrap,.proof-grid,.faq-grid,.contact-wrap{grid-template-columns:1fr}
      .demo-grid{grid-template-columns:1fr}
      .flow{grid-template-columns:repeat(4,1fr)}
      .flow-node:not(:last-child)::after{
        left:100%;top:50%;width:12px;height:2px;
      }
      .faq-note{position:relative;top:auto}
      .fixed-cta{left:18px;right:18px}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
    }
    @media (max-width:767px){
      body{padding-bottom:112px}
      .container{width:calc(100% - 36px)}
      .section{padding:64px 0}
      .section.tight{padding:52px 0}
      .section-head{display:block}
      .lead{font-size:16px;line-height:1.8}
      .hero-actions{display:grid;grid-template-columns:1fr 1fr}
      .hero-actions .btn{width:100%;padding:0 14px}
      .index-grid,.module-card,.metric-strip,.form-grid{grid-template-columns:1fr}
      .feature-card{
        grid-template-columns:1fr;
        gap:12px;
        padding:22px;
      }
      .demo{padding:22px;border-radius:26px}
      .flow{grid-template-columns:1fr}
      .flow-node:not(:last-child)::after{
        left:50%;top:100%;width:2px;height:12px;
      }
      .post-card{grid-template-columns:1fr;padding:20px}
      .empty-state{display:grid;text-align:left;padding:24px}
      .contact-form,.check-card{padding:22px}
      .fixed-cta{
        min-height:86px;
        border-radius:22px 22px 0 0;
        left:0;right:0;bottom:0;
        padding:12px 14px calc(12px + env(safe-area-inset-bottom));
        display:grid;
        grid-template-columns:1fr;
        gap:10px;
      }
      .fixed-cta span{display:none}
      .fixed-actions{display:grid;grid-template-columns:1fr 1fr;width:100%}
      .fixed-actions .btn{min-height:44px;padding:0 12px}
      .footer{padding-bottom:128px}
    }
    @media (max-width:520px){
      h1{letter-spacing:-.03em}
      .mobile-logo span{font-size:14px;max-width:172px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
      .hero-actions{grid-template-columns:1fr}
      .trust-tags{gap:8px}
      .tag{font-size:12px}
      .hero-panel{padding:14px;border-radius:24px}
      summary{font-size:16px;padding:15px 16px}
      .faq-answer{margin:0 16px 18px;padding:0 0 18px 14px}
    }
    @media (prefers-reduced-motion:reduce){
      *,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
    }

/* roulang page: article */
:root{
      --ink:#10231F;
      --ink-2:#14352E;
      --ink-3:#1D443A;
      --accent:#20C997;
      --accent-2:#22D3A6;
      --accent-dark:#16A37F;
      --amber:#F59E0B;
      --amber-soft:#FFF4D8;
      --bg:#F6F3EC;
      --paper:#FFFFFF;
      --paper-soft:#FBFAF6;
      --line:#E3DED4;
      --line-strong:#D2CABD;
      --text:#2D332F;
      --muted:#6B746E;
      --muted-2:#87918A;
      --green-soft:#ECF8F3;
      --radius-xl:24px;
      --radius-lg:18px;
      --radius-md:14px;
      --shadow:0 18px 50px rgba(16,35,31,.08);
      --shadow-strong:0 22px 70px rgba(16,35,31,.13);
      --side:248px;
      --container:1180px;
      --focus:0 0 0 4px rgba(32,201,151,.28);
      --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
      --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font);
      color:var(--text);
      background:
        radial-gradient(circle at 92% 8%, rgba(32,201,151,.12), transparent 30%),
        linear-gradient(135deg, rgba(255,255,255,.58), transparent 36%),
        var(--bg);
      line-height:1.75;
      min-height:100vh;
      padding-bottom:84px;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{border:0;cursor:pointer}
    ::selection{background:rgba(32,201,151,.28);color:var(--ink)}

    .container{
      width:min(var(--container), calc(100vw - 80px));
      margin:0 auto;
    }

    .sidebar{
      position:fixed;
      inset:0 auto 0 0;
      width:var(--side);
      background:
        linear-gradient(180deg, rgba(34,211,166,.08), transparent 32%),
        var(--ink);
      color:#F6FFF9;
      padding:26px 20px;
      display:flex;
      flex-direction:column;
      border-right:1px solid rgba(255,255,255,.1);
      z-index:80;
      box-shadow:8px 0 32px rgba(16,35,31,.16);
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-height:56px;
      border-radius:18px;
      padding:8px;
      outline:none;
    }
    .brand:hover{background:rgba(255,255,255,.06)}
    .brand:focus-visible{box-shadow:var(--focus)}
    .brand-mark{
      width:42px;
      height:42px;
      border-radius:15px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg,var(--accent-2),var(--accent));
      color:var(--ink);
      font-weight:900;
      font-size:21px;
      box-shadow:0 12px 24px rgba(32,201,151,.24);
      flex:0 0 auto;
    }
    .brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
    .brand-text strong{
      font-size:15px;
      line-height:1.25;
      letter-spacing:.01em;
      white-space:normal;
    }
    .brand-text span{
      font-size:12px;
      color:rgba(246,255,249,.68);
    }
    .side-nav{
      display:grid;
      gap:8px;
      margin-top:34px;
    }
    .nav-link{
      min-height:46px;
      display:flex;
      align-items:center;
      gap:11px;
      padding:11px 13px;
      border-radius:999px;
      color:rgba(246,255,249,.78);
      font-size:15px;
      position:relative;
      outline:none;
    }
    .nav-link::before{
      content:"";
      position:absolute;
      left:5px;
      top:50%;
      width:4px;
      height:0;
      border-radius:999px;
      background:var(--accent-2);
      transform:translateY(-50%);
      transition:height .2s ease;
    }
    .nav-link:hover{
      color:#fff;
      background:rgba(255,255,255,.07);
      transform:translateX(2px);
    }
    .nav-link.active{
      color:#fff;
      background:rgba(32,201,151,.14);
      border:1px solid rgba(32,201,151,.24);
    }
    .nav-link.active::before{height:24px}
    .nav-link:focus-visible{box-shadow:var(--focus)}
    .nav-ico{
      width:22px;
      height:22px;
      display:grid;
      place-items:center;
      color:var(--accent-2);
      font-size:17px;
      flex:0 0 auto;
    }
    .side-spacer{flex:1}
    .side-status{
      margin-top:24px;
      padding:18px;
      border-radius:22px;
      background:rgba(255,255,255,.07);
      border:1px solid rgba(255,255,255,.12);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
    }
    .status-dot{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:#DFFFF5;
      font-size:13px;
      font-weight:700;
    }
    .status-dot::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--accent-2);
      box-shadow:0 0 0 5px rgba(34,211,166,.14);
    }
    .side-status p{
      margin:12px 0 16px;
      color:rgba(246,255,249,.68);
      font-size:13px;
      line-height:1.65;
    }

    .mobile-topbar{
      display:none;
      position:fixed;
      inset:0 0 auto 0;
      height:64px;
      padding:10px 18px;
      background:rgba(16,35,31,.96);
      color:#fff;
      z-index:90;
      border-bottom:1px solid rgba(255,255,255,.12);
      backdrop-filter:saturate(140%) blur(10px);
      align-items:center;
      justify-content:space-between;
      gap:12px;
    }
    .mobile-brand{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:0;
      font-weight:800;
      font-size:15px;
    }
    .mobile-brand .brand-mark{width:38px;height:38px;border-radius:14px;font-size:19px}
    .menu-toggle{
      width:44px;
      height:44px;
      border-radius:14px;
      background:rgba(255,255,255,.08);
      color:#fff;
      display:grid;
      place-items:center;
      border:1px solid rgba(255,255,255,.12);
      outline:none;
    }
    .menu-toggle:hover{background:rgba(255,255,255,.14)}
    .menu-toggle:focus-visible{box-shadow:var(--focus)}
    .drawer-mask{
      position:fixed;
      inset:0;
      background:rgba(8,18,16,.52);
      z-index:75;
      opacity:0;
      pointer-events:none;
      transition:opacity .22s ease;
    }
    body.drawer-open .drawer-mask{opacity:1;pointer-events:auto}

    .page{
      margin-left:var(--side);
      min-height:100vh;
      overflow:hidden;
    }
    .main{
      padding:44px 0 0;
    }

    .btn{
      min-height:44px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      padding:12px 18px;
      border-radius:999px;
      font-weight:800;
      font-size:14px;
      border:1px solid transparent;
      outline:none;
      white-space:nowrap;
      user-select:none;
    }
    .btn-primary{
      background:linear-gradient(135deg,var(--accent-2),var(--accent));
      color:var(--ink);
      box-shadow:0 14px 28px rgba(32,201,151,.22);
    }
    .btn-primary:hover{
      background:linear-gradient(135deg,var(--accent),var(--accent-dark));
      transform:translateY(-2px);
      box-shadow:0 18px 34px rgba(32,201,151,.3);
    }
    .btn-secondary{
      background:rgba(255,255,255,.72);
      color:var(--ink);
      border-color:#C9D8D1;
    }
    .btn-secondary:hover{
      background:var(--green-soft);
      border-color:rgba(32,201,151,.55);
      transform:translateY(-2px);
    }
    .btn-dark{
      width:100%;
      background:rgba(34,211,166,.16);
      color:#EFFFF8;
      border-color:rgba(34,211,166,.28);
    }
    .btn-dark:hover{
      background:rgba(34,211,166,.24);
      border-color:rgba(34,211,166,.45);
      transform:translateY(-2px);
    }
    .btn:focus-visible{box-shadow:var(--focus)}
    .btn:active{transform:translateY(0) scale(.98)}

    .badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      border-radius:999px;
      padding:6px 10px;
      font-size:12px;
      line-height:1.2;
      font-weight:800;
      color:var(--ink-2);
      background:var(--green-soft);
      border:1px solid rgba(32,201,151,.22);
      white-space:nowrap;
    }
    .badge-time{background:#F1EDE4;border-color:#E1D9CB;color:#665F54}
    .badge-amber{background:var(--amber-soft);border-color:#F7D589;color:#7A4A00}

    .article-shell{
      padding:18px 0 92px;
    }
    .breadcrumb{
      display:flex;
      align-items:center;
      gap:9px;
      flex-wrap:wrap;
      color:var(--muted);
      font-size:13px;
      margin:0 0 18px;
    }
    .breadcrumb a{
      color:var(--muted);
      border-bottom:1px solid transparent;
    }
    .breadcrumb a:hover{
      color:var(--accent-dark);
      border-bottom-color:rgba(32,201,151,.45);
    }
    .breadcrumb span{
      min-width:0;
      max-width:520px;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .article-hero{
      position:relative;
      overflow:hidden;
      border-radius:32px;
      padding:42px;
      background:
        linear-gradient(135deg, rgba(255,255,255,.95), rgba(251,250,246,.92)),
        radial-gradient(circle at 88% 12%, rgba(34,211,166,.22), transparent 28%);
      border:1px solid var(--line);
      box-shadow:var(--shadow);
    }
    .article-hero::before{
      content:"";
      position:absolute;
      inset:auto -54px -66px auto;
      width:260px;
      height:260px;
      border-radius:50%;
      background:repeating-linear-gradient(90deg, rgba(16,35,31,.08) 0 1px, transparent 1px 18px);
      transform:rotate(18deg);
      opacity:.75;
    }
    .article-hero::after{
      content:"/level-2/ article / index";
      position:absolute;
      right:34px;
      top:28px;
      font-family:var(--mono);
      font-size:12px;
      color:rgba(16,35,31,.35);
      padding:8px 12px;
      border-radius:999px;
      background:rgba(236,248,243,.72);
      border:1px solid rgba(32,201,151,.2);
    }
    .article-kicker{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
      margin-bottom:18px;
      position:relative;
      z-index:1;
    }
    .article-hero h1{
      position:relative;
      z-index:1;
      margin:0;
      max-width:900px;
      font-size:clamp(30px, 4vw, 46px);
      line-height:1.16;
      letter-spacing:-.03em;
      color:var(--ink);
      font-weight:900;
    }
    .article-meta{
      position:relative;
      z-index:1;
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
      margin-top:22px;
      color:var(--muted);
      font-size:14px;
    }
    .article-summary{
      position:relative;
      z-index:1;
      margin:26px 0 0;
      padding:18px 20px;
      border-radius:18px;
      background:rgba(236,248,243,.72);
      border:1px solid rgba(32,201,151,.2);
      color:#34423B;
      line-height:1.85;
      max-width:920px;
    }

    .article-layout{
      display:grid;
      grid-template-columns:minmax(0, 820px) 300px;
      gap:34px;
      align-items:start;
      margin-top:34px;
    }
    .article-card{
      background:var(--paper);
      border:1px solid var(--line);
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
    }
    .article-body{
      padding:38px 42px;
      font-size:17px;
      line-height:1.88;
      color:var(--text);
    }
    .article-body > *:first-child{margin-top:0}
    .article-body > *:last-child{margin-bottom:0}
    .article-body p{margin:0 0 1.15em}
    .article-body h2{
      margin:2.2em 0 .8em;
      padding-top:.15em;
      font-size:28px;
      line-height:1.28;
      color:var(--ink);
      letter-spacing:-.02em;
    }
    .article-body h2::before{
      content:"";
      display:inline-block;
      width:9px;
      height:24px;
      border-radius:999px;
      background:var(--accent);
      margin-right:10px;
      vertical-align:-4px;
    }
    .article-body h3{
      margin:1.8em 0 .65em;
      font-size:22px;
      line-height:1.35;
      color:var(--ink-2);
    }
    .article-body h4{
      margin:1.45em 0 .55em;
      font-size:18px;
      color:var(--ink-2);
    }
    .article-body a{
      color:var(--accent-dark);
      border-bottom:1px solid rgba(32,201,151,.38);
      font-weight:700;
    }
    .article-body a:hover{
      color:var(--ink);
      background:rgba(32,201,151,.1);
    }
    .article-body ul,
    .article-body ol{
      margin:0 0 1.25em;
      padding-left:1.45em;
    }
    .article-body li{
      margin:.42em 0;
      padding-left:.2em;
    }
    .article-body blockquote{
      margin:1.6em 0;
      padding:18px 22px;
      border-left:5px solid var(--accent);
      border-radius:0 18px 18px 0;
      background:var(--green-soft);
      color:#31443C;
    }
    .article-body blockquote p:last-child{margin-bottom:0}
    .article-body code{
      font-family:var(--mono);
      background:#F1EDE4;
      color:#0E2E27;
      border:1px solid #E2D9CA;
      border-radius:8px;
      padding:.16em .42em;
      font-size:.9em;
    }
    .article-body pre{
      margin:1.5em 0;
      padding:20px;
      overflow:auto;
      border-radius:18px;
      background:#132A25;
      color:#DFFFF5;
      border:1px solid rgba(255,255,255,.12);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
      line-height:1.7;
    }
    .article-body pre code{
      background:transparent;
      border:0;
      color:inherit;
      padding:0;
      font-size:14px;
    }
    .article-body table{
      width:100%;
      border-collapse:separate;
      border-spacing:0;
      margin:1.6em 0;
      overflow:hidden;
      border:1px solid var(--line);
      border-radius:16px;
      font-size:15px;
    }
    .article-body th,
    .article-body td{
      padding:12px 14px;
      border-bottom:1px solid var(--line);
      vertical-align:top;
    }
    .article-body th{
      background:#F1EDE4;
      color:var(--ink);
      text-align:left;
      font-weight:800;
    }
    .article-body tr:last-child td{border-bottom:0}
    .article-body img{
      margin:1.5em auto;
      border-radius:18px;
      border:1px solid var(--line);
      box-shadow:0 14px 36px rgba(16,35,31,.08);
    }
    .article-body hr{
      border:0;
      height:1px;
      background:var(--line);
      margin:2em 0;
    }
    .not-found{
      text-align:center;
      padding:58px 24px;
      background:linear-gradient(135deg,#fff,var(--paper-soft));
      border-radius:24px;
      border:1px dashed #C8D9D1;
    }
    .not-found .empty-icon{
      width:62px;
      height:62px;
      margin:0 auto 18px;
      border-radius:22px;
      display:grid;
      place-items:center;
      background:var(--green-soft);
      color:var(--accent-dark);
      font-size:28px;
      font-weight:900;
    }
    .not-found h2{
      margin:0 0 10px;
      font-size:26px;
      color:var(--ink);
    }
    .not-found p{
      margin:0 auto 22px;
      max-width:520px;
      color:var(--muted);
    }

    .article-sidebar{
      position:sticky;
      top:28px;
      display:grid;
      gap:18px;
    }
    .side-card{
      background:var(--paper-soft);
      border:1px solid var(--line);
      border-radius:24px;
      padding:22px;
      box-shadow:0 14px 36px rgba(16,35,31,.06);
    }
    .side-card.dark{
      background:
        linear-gradient(180deg, rgba(34,211,166,.08), transparent),
        var(--ink);
      color:#F4FFF9;
      border-color:rgba(255,255,255,.12);
    }
    .side-card h2,
    .side-card h3{
      margin:0 0 14px;
      color:var(--ink);
      font-size:18px;
      line-height:1.35;
    }
    .side-card.dark h2,
    .side-card.dark h3{color:#fff}
    .toc-list{
      display:grid;
      gap:10px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .toc-list a{
      display:flex;
      align-items:center;
      gap:9px;
      min-height:34px;
      color:var(--muted);
      font-size:14px;
      border-radius:12px;
      padding:7px 8px;
    }
    .toc-list a::before{
      content:"";
      width:6px;
      height:6px;
      border-radius:50%;
      background:var(--accent);
      flex:0 0 auto;
    }
    .toc-list a:hover{
      color:var(--ink);
      background:var(--green-soft);
      transform:translateX(2px);
    }
    .info-list{
      display:grid;
      gap:12px;
      margin:0;
      padding:0;
      list-style:none;
      color:rgba(246,255,249,.72);
      font-size:14px;
    }
    .info-list li{
      display:flex;
      justify-content:space-between;
      gap:12px;
      padding-bottom:12px;
      border-bottom:1px solid rgba(255,255,255,.1);
    }
    .info-list li:last-child{border-bottom:0;padding-bottom:0}
    .info-list strong{color:#fff;font-weight:800}
    .mini-panel{
      margin-top:18px;
      padding:14px;
      border-radius:18px;
      background:rgba(255,255,255,.07);
      border:1px solid rgba(255,255,255,.12);
      font-family:var(--mono);
      color:#CFFFEF;
      font-size:12px;
      line-height:1.7;
    }
    .return-card p{
      margin:0 0 16px;
      color:var(--muted);
      font-size:14px;
      line-height:1.75;
    }

    .related-section{
      margin-top:34px;
    }
    .section-head{
      display:flex;
      justify-content:space-between;
      align-items:end;
      gap:18px;
      margin-bottom:18px;
    }
    .section-head h2{
      margin:0;
      color:var(--ink);
      font-size:28px;
      line-height:1.25;
      letter-spacing:-.02em;
    }
    .section-head p{
      margin:6px 0 0;
      color:var(--muted);
      font-size:15px;
    }
    .related-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:18px;
    }
    .related-card{
      display:flex;
      flex-direction:column;
      gap:12px;
      min-height:178px;
      padding:22px;
      border-radius:22px;
      background:var(--paper);
      border:1px solid var(--line);
      box-shadow:0 12px 34px rgba(16,35,31,.06);
      outline:none;
    }
    .related-card:hover{
      transform:translateY(-3px);
      border-color:rgba(32,201,151,.48);
      box-shadow:var(--shadow);
    }
    .related-card:focus-visible{box-shadow:var(--focus)}
    .related-card h3{
      margin:0;
      color:var(--ink);
      font-size:18px;
      line-height:1.42;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .related-card:hover h3{color:var(--accent-dark)}
    .related-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.65;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .related-meta{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:auto;
    }
    .read-more{
      color:var(--accent-dark);
      font-weight:800;
      font-size:14px;
    }
    .related-card:hover .read-more{transform:translateX(3px)}

    .article-cta{
      margin-top:34px;
      display:grid;
      grid-template-columns:1.25fr auto;
      align-items:center;
      gap:20px;
      padding:28px;
      border-radius:26px;
      background:
        linear-gradient(135deg, rgba(32,201,151,.12), rgba(245,158,11,.10)),
        var(--paper-soft);
      border:1px solid rgba(32,201,151,.24);
      box-shadow:var(--shadow);
    }
    .article-cta h2{
      margin:0 0 8px;
      color:var(--ink);
      font-size:24px;
      line-height:1.28;
    }
    .article-cta p{
      margin:0;
      color:var(--muted);
      max-width:680px;
    }
    .cta-actions{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }

    .contact-strip{
      position:fixed;
      left:calc(var(--side) + 24px);
      right:24px;
      bottom:18px;
      min-height:66px;
      z-index:70;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:14px 18px 14px 22px;
      border-radius:22px;
      background:rgba(16,35,31,.96);
      color:#F6FFF9;
      border:1px solid rgba(255,255,255,.12);
      box-shadow:0 18px 54px rgba(16,35,31,.24);
      backdrop-filter:saturate(150%) blur(12px);
    }
    .contact-strip strong{
      display:block;
      font-size:15px;
      line-height:1.35;
    }
    .contact-strip span{
      display:block;
      color:rgba(246,255,249,.68);
      font-size:13px;
      margin-top:2px;
    }
    .strip-actions{
      display:flex;
      gap:10px;
      align-items:center;
      flex:0 0 auto;
    }

    .footer{
      padding:54px 0 38px;
      background:rgba(255,255,255,.32);
      border-top:1px solid var(--line);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr auto;
      gap:28px;
      align-items:start;
    }
    .footer-brand strong{
      display:block;
      color:var(--ink);
      font-size:20px;
      margin-bottom:8px;
    }
    .footer-brand p{
      margin:0;
      color:var(--muted);
      max-width:520px;
      font-size:14px;
      line-height:1.75;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      justify-content:flex-end;
      gap:10px 16px;
      font-size:14px;
    }
    .footer-links a{
      color:var(--muted);
      border-bottom:1px solid transparent;
    }
    .footer-links a:hover{
      color:var(--accent-dark);
      border-bottom-color:rgba(32,201,151,.42);
    }
    .copyright{
      margin-top:28px;
      padding-top:18px;
      border-top:1px solid var(--line);
      display:flex;
      justify-content:space-between;
      gap:14px;
      flex-wrap:wrap;
      color:var(--muted-2);
      font-size:13px;
    }

    @media (max-width:1199px){
      :root{--side:220px}
      .container{width:min(var(--container), calc(100vw - 56px))}
      .article-layout{grid-template-columns:minmax(0, 1fr) 280px;gap:26px}
      .article-body{padding:34px}
    }

    @media (max-width:991px){
      body{padding-top:64px}
      .mobile-topbar{display:flex}
      .sidebar{
        transform:translateX(-105%);
        transition:transform .24s ease;
        width:286px;
        padding-top:82px;
      }
      body.drawer-open .sidebar{transform:translateX(0)}
      .page{margin-left:0}
      .main{padding-top:26px}
      .contact-strip{left:18px;right:18px}
      .article-layout{grid-template-columns:1fr}
      .article-sidebar{position:static;grid-template-columns:1fr 1fr}
      .side-card.dark{grid-column:span 2}
      .article-hero{padding:34px 30px}
      .article-hero::after{display:none}
      .related-grid{grid-template-columns:1fr}
    }

    @media (max-width:767px){
      body{padding-bottom:112px}
      .container{width:calc(100vw - 36px)}
      .article-shell{padding-bottom:62px}
      .article-hero{border-radius:24px;padding:28px 22px}
      .article-hero h1{font-size:clamp(28px, 8.4vw, 34px)}
      .article-summary{padding:16px;margin-top:20px}
      .article-body{padding:26px 20px;font-size:16px;line-height:1.86}
      .article-body h2{font-size:24px}
      .article-body h3{font-size:20px}
      .article-body table{display:block;overflow-x:auto;white-space:nowrap}
      .article-sidebar{grid-template-columns:1fr}
      .side-card.dark{grid-column:auto}
      .section-head{align-items:start;flex-direction:column}
      .section-head h2{font-size:24px}
      .article-cta{grid-template-columns:1fr;padding:22px}
      .cta-actions{justify-content:flex-start}
      .contact-strip{
        bottom:12px;
        left:12px;
        right:12px;
        min-height:76px;
        border-radius:20px;
        padding:12px;
        display:grid;
        grid-template-columns:1fr;
      }
      .contact-strip > div:first-child{display:none}
      .strip-actions{display:grid;grid-template-columns:1fr 1fr;width:100%}
      .strip-actions .btn{width:100%;padding:10px 12px}
      .footer{padding-bottom:118px}
      .footer-grid{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
      .copyright{flex-direction:column}
    }

    @media (max-width:520px){
      .mobile-brand span:not(.brand-mark){
        overflow:hidden;
        text-overflow:ellipsis;
        white-space:nowrap;
        max-width:190px;
      }
      .breadcrumb span{max-width:260px}
      .article-meta{align-items:flex-start}
      .related-card{padding:19px}
      .btn{font-size:13px}
    }

    @media (prefers-reduced-motion:reduce){
      *,*::before,*::after{
        scroll-behavior:auto!important;
        transition:none!important;
        animation:none!important;
      }
    }