/* roulang page: index */
:root{
      --bg: #070b14;
      --bg-2: #090f1d;
      --panel: rgba(255,255,255,.06);
      --panel-2: rgba(255,255,255,.08);
      --panel-strong: rgba(255,255,255,.11);
      --line: rgba(255,255,255,.10);
      --line-strong: rgba(53,208,255,.18);
      --text: #d8dee9;
      --muted: #8f9aab;
      --title: #f4f7fb;
      --blue: #1e5eff;
      --blue-2: #4b7dff;
      --cyan: #35d0ff;
      --rose: #b23a6f;
      --rose-2: #a12c5f;
      --orange: #ffb86b;
      --green: #66e3b4;
      --shadow: 0 20px 60px rgba(0,0,0,.35);
      --shadow-soft: 0 12px 32px rgba(0,0,0,.22);
      --radius-xl: 32px;
      --radius-lg: 24px;
      --radius-md: 18px;
      --radius-sm: 14px;
      --sidebar-w: 252px;
      --sidebar-w-collapsed: 92px;
      --content-max: 1280px;
      --gap: 24px;
      --gap-lg: 32px;
      --focus: 0 0 0 3px rgba(53,208,255,.24), 0 0 0 1px rgba(53,208,255,.45) inset;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body{
      margin:0;
      min-height:100vh;
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "HarmonyOS Sans", system-ui, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at 86% 8%, rgba(178,58,111,.24), transparent 24%),
        radial-gradient(circle at 10% 84%, rgba(53,208,255,.18), transparent 26%),
        radial-gradient(circle at 56% 56%, rgba(30,94,255,.08), transparent 26%),
        linear-gradient(180deg, #070b14 0%, #060810 100%);
      overflow-x:hidden;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background:
        linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
      background-size: 56px 56px;
      opacity:.16;
      mask-image: radial-gradient(circle at center, #000 64%, transparent 100%);
    }
    body::after{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background:
        linear-gradient(180deg, rgba(255,255,255,.02), transparent 12%, transparent 88%, rgba(255,255,255,.02));
      mix-blend-mode: screen;
      opacity:.25;
    }
    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, opacity .2s ease;
    }
    img{ max-width:100%; display:block; }
    button, input, textarea, select{
      font: inherit;
      color: inherit;
    }
    button{
      border:0;
      background:none;
      cursor:pointer;
    }
    :focus-visible{
      outline:none;
      box-shadow: var(--focus);
    }
    .shell{
      position:relative;
      min-height:100vh;
    }
    .sidebar{
      position:fixed;
      inset:0 auto 0 0;
      width:var(--sidebar-w);
      padding:22px 18px 18px;
      background: linear-gradient(180deg, rgba(9,13,24,.94), rgba(7,10,18,.88));
      border-right:1px solid rgba(255,255,255,.08);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      box-shadow: 10px 0 40px rgba(0,0,0,.22);
      z-index:40;
      display:flex;
      flex-direction:column;
      gap:20px;
      overflow-y:auto;
    }
    .sidebar::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 20% 18%, rgba(53,208,255,.10), transparent 25%),
        radial-gradient(circle at 90% 14%, rgba(178,58,111,.10), transparent 18%);
      pointer-events:none;
    }
    .brand{
      position:relative;
      display:flex;
      align-items:center;
      gap:14px;
      padding:10px 8px 14px;
      z-index:1;
    }
    .brand-mark{
      width:48px;
      height:48px;
      border-radius:16px;
      background:
        linear-gradient(145deg, rgba(30,94,255,.28), rgba(178,58,111,.22));
      border:1px solid rgba(53,208,255,.22);
      box-shadow: 0 10px 24px rgba(0,0,0,.28), 0 0 0 1px rgba(255,255,255,.03) inset;
      display:grid;
      place-items:center;
      flex:none;
      position:relative;
      overflow:hidden;
    }
    .brand-mark::after{
      content:"";
      position:absolute;
      inset:7px;
      border-radius:12px;
      border:1px solid rgba(255,255,255,.08);
      background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,0));
    }
    .brand-mark svg{
      width:24px;
      height:24px;
      position:relative;
      z-index:1;
      color:#edf4ff;
      filter: drop-shadow(0 0 10px rgba(53,208,255,.35));
    }
    .brand-text{
      display:flex;
      flex-direction:column;
      gap:4px;
      min-width:0;
    }
    .brand-text strong{
      font-size:16px;
      line-height:1.25;
      color:var(--title);
      letter-spacing:.2px;
    }
    .brand-text span{
      font-size:12px;
      color:var(--muted);
      letter-spacing:.08em;
      text-transform:uppercase;
    }
    .nav{
      position:relative;
      display:flex;
      flex-direction:column;
      gap:8px;
      z-index:1;
    }
    .nav-label-small{
      margin:6px 8px 4px;
      color:var(--muted);
      font-size:12px;
      letter-spacing:.12em;
      text-transform:uppercase;
    }
    .nav-link{
      display:flex;
      align-items:center;
      gap:12px;
      padding:14px 14px;
      border-radius:18px;
      border:1px solid transparent;
      color:var(--text);
      background:transparent;
      position:relative;
      overflow:hidden;
    }
    .nav-link::before{
      content:"";
      position:absolute;
      left:0;
      top:12%;
      bottom:12%;
      width:3px;
      border-radius:999px;
      background:transparent;
      transition: background .2s ease, box-shadow .2s ease;
    }
    .nav-link:hover{
      background: rgba(255,255,255,.05);
      border-color: rgba(255,255,255,.08);
      transform: translateX(2px);
      color:var(--title);
    }
    .nav-link:hover::before{
      background: rgba(53,208,255,.92);
      box-shadow: 0 0 16px rgba(53,208,255,.4);
    }
    .nav-link.active{
      background: linear-gradient(135deg, rgba(30,94,255,.18), rgba(178,58,111,.14));
      border-color: rgba(53,208,255,.18);
      color:var(--title);
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.04);
    }
    .nav-link.active::before{
      background: linear-gradient(180deg, var(--cyan), var(--blue));
      box-shadow: 0 0 18px rgba(53,208,255,.45);
    }
    .nav-icon{
      width:20px;
      height:20px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      flex:none;
      color: var(--cyan);
      opacity:.95;
    }
    .nav-icon svg{
      width:20px;
      height:20px;
      stroke: currentColor;
      stroke-width:1.8;
      fill:none;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .nav-label{
      font-size:14px;
      line-height:1.35;
      font-weight:600;
      letter-spacing:.02em;
    }
    .sidebar-bottom{
      margin-top:auto;
      position:relative;
      z-index:1;
      padding:14px 8px 8px;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .age-badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      width:max-content;
      padding:8px 12px;
      border-radius:999px;
      border:1px solid rgba(255,184,107,.26);
      background: rgba(255,184,107,.08);
      color:#ffd6a1;
      font-size:12px;
      letter-spacing:.08em;
      font-weight:700;
    }
    .age-badge i{
      width:8px;
      height:8px;
      border-radius:50%;
      background: var(--orange);
      box-shadow: 0 0 14px rgba(255,184,107,.5);
      display:inline-block;
    }
    .sidebar-note{
      color:var(--muted);
      font-size:12px;
      line-height:1.7;
    }
    .tech-link{
      display:inline-flex;
      align-items:center;
      width:max-content;
      color:#b9c8dd;
      font-size:12px;
      text-decoration:underline;
      text-decoration-color: rgba(185,200,221,.28);
      text-underline-offset: 3px;
    }
    .content{
      margin-left:var(--sidebar-w);
      min-height:100vh;
      position:relative;
      z-index:1;
    }
    .topbar{
      position:fixed;
      top:0;
      left:0;
      right:0;
      height:68px;
      display:none;
      align-items:center;
      justify-content:space-between;
      padding:0 16px calc(env(safe-area-inset-top) * .2);
      background: rgba(7,10,18,.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom:1px solid rgba(255,255,255,.08);
      z-index:60;
    }
    .topbar-brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:0;
    }
    .topbar-brand .brand-mark{
      width:42px;
      height:42px;
      border-radius:14px;
    }
    .topbar-brand .brand-text strong{
      font-size:14px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
      max-width:58vw;
    }
    .menu-btn{
      width:44px;
      height:44px;
      display:grid;
      place-items:center;
      border-radius:14px;
      border:1px solid rgba(255,255,255,.10);
      background: rgba(255,255,255,.05);
      color:var(--title);
      box-shadow: var(--shadow-soft);
    }
    .menu-btn:hover{
      border-color: rgba(53,208,255,.22);
      background: rgba(53,208,255,.08);
      transform: translateY(-1px);
    }
    .menu-lines{
      width:18px;
      height:14px;
      display:grid;
      gap:3px;
    }
    .menu-lines span{
      display:block;
      height:2px;
      border-radius:999px;
      background: currentColor;
    }
    .drawer-backdrop{
      position:fixed;
      inset:0;
      background: rgba(2,5,12,.58);
      backdrop-filter: blur(3px);
      -webkit-backdrop-filter: blur(3px);
      opacity:0;
      visibility:hidden;
      transition: opacity .2s ease, visibility .2s ease;
      z-index:45;
    }
    .page{
      width:min(var(--content-max), calc(100vw - var(--sidebar-w)));
      margin:0 auto;
      padding: 30px 36px 56px;
    }
    .section{
      margin-top:88px;
      position:relative;
    }
    .section:first-child{
      margin-top:0;
      padding-top:28px;
    }
    .hero{
      padding-top:18px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.14fr .86fr;
      gap:28px;
      align-items:stretch;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:9px 14px;
      border-radius:999px;
      border:1px solid rgba(255,184,107,.24);
      background: rgba(255,184,107,.08);
      color:#ffd7a6;
      font-size:12px;
      line-height:1;
      letter-spacing:.08em;
      font-weight:700;
      margin-bottom:18px;
    }
    .hero h1{
      margin:0;
      color:var(--title);
      font-size:clamp(32px, 4.3vw, 56px);
      line-height:1.12;
      letter-spacing:-.03em;
      font-weight:800;
      max-width:11.5em;
    }
    .hero .lead{
      margin:20px 0 0;
      font-size:17px;
      line-height:1.86;
      color:var(--text);
      max-width:42em;
    }
    .hero-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin:22px 0 0;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:9px 12px;
      border-radius:999px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      color:#dfe6f2;
      font-size:12px;
      line-height:1;
      white-space:nowrap;
    }
    .tag strong{
      color:var(--cyan);
      font-weight:700;
    }
    .cta-row{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-top:28px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:50px;
      padding:0 20px;
      border-radius:999px;
      border:1px solid transparent;
      font-size:14px;
      font-weight:700;
      letter-spacing:.02em;
      position:relative;
      overflow:hidden;
      white-space:nowrap;
    }
    .btn-primary{
      color:#fff;
      background: linear-gradient(135deg, var(--blue) 0%, #375fff 40%, var(--rose) 100%);
      box-shadow: 0 18px 40px rgba(30,94,255,.22), 0 8px 28px rgba(178,58,111,.18);
    }
    .btn-primary:hover{
      transform: translateY(-2px);
      box-shadow: 0 24px 50px rgba(30,94,255,.28), 0 12px 36px rgba(178,58,111,.22);
      filter: brightness(1.04);
    }
    .btn-secondary{
      color: var(--title);
      background: rgba(255,255,255,.04);
      border-color: rgba(255,255,255,.12);
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
    }
    .btn-secondary:hover{
      transform: translateY(-2px);
      border-color: rgba(53,208,255,.28);
      background: rgba(53,208,255,.08);
    }
    .btn-accent{
      color:#1a1308;
      background: linear-gradient(135deg, #ffce91, #ffb86b);
      box-shadow: 0 14px 28px rgba(255,184,107,.18);
    }
    .btn-accent:hover{
      transform: translateY(-2px);
      filter: brightness(1.03);
    }
    .hero-note{
      margin-top:16px;
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      align-items:center;
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }
    .hero-note span{
      display:inline-flex;
      align-items:center;
      gap:8px;
    }
    .hero-note span::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background: var(--cyan);
      box-shadow: 0 0 0 4px rgba(53,208,255,.12);
      flex:none;
    }
    .hero-panel{
      border-radius:var(--radius-xl);
      background:
        linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.045));
      border:1px solid rgba(255,255,255,.10);
      box-shadow: var(--shadow);
      padding:22px;
      position:relative;
      overflow:hidden;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
    }
    .hero-panel::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 82% 10%, rgba(178,58,111,.18), transparent 24%),
        radial-gradient(circle at 14% 18%, rgba(53,208,255,.12), transparent 22%);
      pointer-events:none;
    }
    .panel-head{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:12px;
      margin-bottom:18px;
      position:relative;
      z-index:1;
    }
    .panel-head strong{
      color:var(--title);
      font-size:16px;
      letter-spacing:.02em;
    }
    .panel-head .mini{
      padding:6px 10px;
      border-radius:999px;
      border:1px solid rgba(255,184,107,.20);
      background: rgba(255,184,107,.08);
      color:#ffd7a6;
      font-size:12px;
      font-weight:700;
    }
    .panel-stats{
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap:14px;
      position:relative;
      z-index:1;
    }
    .stat{
      padding:16px;
      border-radius:22px;
      background: rgba(5,10,20,.45);
      border:1px solid rgba(255,255,255,.08);
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
      min-height:104px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      gap:12px;
    }
    .stat .value{
      font-size:30px;
      font-weight:800;
      color:var(--title);
      line-height:1;
      letter-spacing:-.03em;
    }
    .stat .label{
      font-size:13px;
      line-height:1.5;
      color:var(--muted);
    }
    .stat .line{
      width:100%;
      height:8px;
      border-radius:999px;
      background: rgba(255,255,255,.06);
      overflow:hidden;
      position:relative;
    }
    .stat .line::after{
      content:"";
      position:absolute;
      inset:0 auto 0 0;
      width:var(--bar, 60%);
      border-radius:inherit;
      background: linear-gradient(90deg, var(--blue), var(--cyan));
      box-shadow: 0 0 18px rgba(53,208,255,.28);
    }
    .stat.r1 .line{ --bar: 86%; }
    .stat.r2 .line{ --bar: 78%; }
    .stat.r3 .line{ --bar: 92%; }
    .stat.r4 .line{ --bar: 88%; }
    .player-card{
      margin-top:14px;
      padding:18px;
      border-radius:24px;
      background: linear-gradient(135deg, rgba(30,94,255,.12), rgba(178,58,111,.10));
      border:1px solid rgba(53,208,255,.14);
      position:relative;
      z-index:1;
      overflow:hidden;
    }
    .player-card::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 72% 30%, rgba(255,255,255,.08), transparent 20%),
        radial-gradient(circle at 18% 80%, rgba(53,208,255,.12), transparent 22%);
      pointer-events:none;
    }
    .player-thumb{
      height:166px;
      border-radius:22px;
      background:
        linear-gradient(135deg, rgba(17,25,44,.9), rgba(11,15,26,.92)),
        radial-gradient(circle at 30% 30%, rgba(53,208,255,.16), transparent 34%),
        radial-gradient(circle at 82% 18%, rgba(178,58,111,.18), transparent 26%);
      border:1px solid rgba(255,255,255,.08);
      display:flex;
      align-items:center;
      justify-content:center;
      position:relative;
      overflow:hidden;
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
    }
    .player-thumb::after{
      content:"";
      position:absolute;
      inset:auto 14px 14px 14px;
      height:44px;
      border-radius:14px;
      background: linear-gradient(90deg, rgba(255,255,255,.10), rgba(255,255,255,.02));
      border:1px solid rgba(255,255,255,.08);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
    }
    .play-lock{
      width:74px;
      height:74px;
      border-radius:24px;
      display:grid;
      place-items:center;
      background: linear-gradient(135deg, rgba(30,94,255,.16), rgba(178,58,111,.16));
      border:1px solid rgba(53,208,255,.22);
      box-shadow: 0 18px 40px rgba(0,0,0,.24), 0 0 0 1px rgba(255,255,255,.02) inset;
      position:relative;
      z-index:1;
    }
    .play-lock svg{
      width:34px;
      height:34px;
      stroke: var(--title);
      fill:none;
      stroke-width:1.8;
      stroke-linecap:round;
      stroke-linejoin:round;
      filter: drop-shadow(0 0 14px rgba(53,208,255,.25));
    }
    .player-caption{
      display:flex;
      justify-content:space-between;
      gap:12px;
      margin-top:14px;
      position:relative;
      z-index:1;
      color:var(--muted);
      font-size:13px;
      line-height:1.6;
    }
    .player-caption strong{
      color:var(--title);
      display:block;
      font-size:14px;
      margin-bottom:4px;
    }
    .strip{
      display:grid;
      grid-template-columns: repeat(4, minmax(0,1fr));
      gap:16px;
      margin-top:26px;
    }
    .strip-item{
      padding:18px 18px 17px;
      border-radius:22px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
      display:flex;
      flex-direction:column;
      gap:10px;
      min-height:126px;
    }
    .strip-item .k{
      display:inline-flex;
      width:max-content;
      padding:6px 10px;
      border-radius:999px;
      background: rgba(53,208,255,.08);
      border:1px solid rgba(53,208,255,.14);
      color:#dff7ff;
      font-size:12px;
      font-weight:700;
    }
    .strip-item strong{
      color:var(--title);
      font-size:16px;
      line-height:1.45;
    }
    .strip-item p{
      margin:0;
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:18px;
      margin-bottom:24px;
    }
    .section-head h2{
      margin:0;
      color:var(--title);
      font-size:clamp(24px, 2.8vw, 36px);
      line-height:1.18;
      letter-spacing:-.02em;
    }
    .section-head p{
      margin:0;
      max-width:46em;
      color:var(--muted);
      font-size:15px;
      line-height:1.8;
    }
    .section-badge{
      padding:8px 12px;
      border-radius:999px;
      border:1px solid rgba(53,208,255,.15);
      background: rgba(53,208,255,.06);
      color:#d8f6ff;
      font-size:12px;
      letter-spacing:.08em;
      font-weight:700;
      white-space:nowrap;
    }
    .bento-grid{
      display:grid;
      grid-template-columns: 1.25fr .75fr .75fr;
      gap:18px;
    }
    .bento-card{
      border-radius:var(--radius-xl);
      background: linear-gradient(180deg, rgba(255,255,255,.075), rgba(255,255,255,.05));
      border:1px solid rgba(255,255,255,.10);
      box-shadow: var(--shadow-soft);
      padding:22px;
      position:relative;
      overflow:hidden;
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      min-height:240px;
    }
    .bento-card::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 82% 18%, rgba(178,58,111,.15), transparent 20%),
        radial-gradient(circle at 10% 80%, rgba(53,208,255,.11), transparent 24%);
      pointer-events:none;
    }
    .bento-card h3{
      margin:0 0 12px;
      color:var(--title);
      font-size:22px;
      line-height:1.3;
    }
    .bento-card p{
      margin:0;
      color:var(--muted);
      font-size:15px;
      line-height:1.85;
    }
    .bento-card .mini-list{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
      position:relative;
      z-index:1;
    }
    .mini-pill{
      padding:8px 10px;
      border-radius:999px;
      border:1px solid rgba(255,255,255,.10);
      background: rgba(255,255,255,.05);
      color:#e3ebf7;
      font-size:12px;
      white-space:nowrap;
    }
    .stack{
      display:grid;
      gap:18px;
    }
    .stack .small-card{
      min-height:111px;
      border-radius:24px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.09);
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
      padding:18px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      gap:10px;
    }
    .small-card strong{
      color:var(--title);
      font-size:17px;
      line-height:1.4;
    }
    .small-card span{
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }
    .small-chip{
      width:max-content;
      padding:6px 10px;
      border-radius:999px;
      background: rgba(178,58,111,.10);
      border:1px solid rgba(178,58,111,.18);
      color:#f7d6e4;
      font-size:12px;
      font-weight:700;
    }
    .category-grid{
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap:20px;
    }
    .category-card{
      display:flex;
      flex-direction:column;
      min-height:100%;
      border-radius:28px;
      background: linear-gradient(180deg, rgba(255,255,255,.075), rgba(255,255,255,.048));
      border:1px solid rgba(255,255,255,.10);
      box-shadow: var(--shadow-soft);
      overflow:hidden;
      position:relative;
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background-color .22s ease;
    }
    .category-card:hover{
      transform: translateY(-4px);
      border-color: rgba(53,208,255,.22);
      box-shadow: 0 22px 58px rgba(0,0,0,.34), 0 0 0 1px rgba(53,208,255,.08) inset;
    }
    .cover{
      position:relative;
      height:164px;
      background:
        linear-gradient(135deg, rgba(30,94,255,.18), rgba(178,58,111,.18)),
        linear-gradient(180deg, rgba(7,10,18,.24), rgba(7,10,18,.6));
      overflow:hidden;
    }
    .cover::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 26% 24%, rgba(255,255,255,.14), transparent 18%),
        radial-gradient(circle at 78% 26%, rgba(53,208,255,.16), transparent 18%),
        radial-gradient(circle at 58% 74%, rgba(178,58,111,.18), transparent 22%);
      opacity:.9;
    }
    .cover::after{
      content:"";
      position:absolute;
      inset:auto 16px 16px 16px;
      height:50px;
      border-radius:16px;
      background: rgba(7,10,18,.42);
      border:1px solid rgba(255,255,255,.10);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
    }
    .cover-icon{
      position:absolute;
      inset:0;
      display:grid;
      place-items:center;
      z-index:1;
    }
    .cover-icon span{
      width:72px;
      height:72px;
      border-radius:24px;
      display:grid;
      place-items:center;
      border:1px solid rgba(255,255,255,.14);
      background: rgba(255,255,255,.06);
      box-shadow: 0 12px 34px rgba(0,0,0,.24);
    }
    .cover-icon svg{
      width:30px;
      height:30px;
      stroke:#eff7ff;
      fill:none;
      stroke-width:1.8;
      stroke-linecap:round;
      stroke-linejoin:round;
      filter: drop-shadow(0 0 10px rgba(53,208,255,.24));
    }
    .card-body{
      padding:18px 18px 20px;
      display:flex;
      flex-direction:column;
      gap:12px;
      height:100%;
    }
    .card-body h3{
      margin:0;
      font-size:20px;
      line-height:1.35;
      color:var(--title);
    }
    .card-body p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }
    .card-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:auto;
    }
    .meta-chip{
      padding:7px 10px;
      border-radius:999px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      color:#dfe8f5;
      font-size:12px;
      white-space:nowrap;
    }
    .card-link{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-top:4px;
      color:#dff7ff;
      font-weight:700;
      font-size:13px;
      width:max-content;
    }
    .card-link::after{
      content:"→";
      transition: transform .2s ease;
    }
    .category-card:hover .card-link::after{
      transform: translateX(3px);
    }
    .metrics-grid{
      display:grid;
      grid-template-columns: repeat(4, minmax(0,1fr));
      gap:18px;
    }
    .metric{
      padding:22px 18px 20px;
      border-radius:24px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
      min-height:150px;
      display:flex;
      flex-direction:column;
      gap:12px;
    }
    .metric .num{
      font-size:34px;
      font-weight:800;
      line-height:1;
      letter-spacing:-.04em;
      color:var(--title);
    }
    .metric .desc{
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }
    .metric .bar{
      margin-top:auto;
      height:8px;
      border-radius:999px;
      background: rgba(255,255,255,.06);
      overflow:hidden;
    }
    .metric .bar span{
      display:block;
      height:100%;
      border-radius:inherit;
      background: linear-gradient(90deg, var(--blue), var(--cyan), var(--rose));
      box-shadow: 0 0 18px rgba(53,208,255,.22);
    }
    .metric:nth-child(1) .bar span{ width:92%; }
    .metric:nth-child(2) .bar span{ width:84%; }
    .metric:nth-child(3) .bar span{ width:96%; }
    .metric:nth-child(4) .bar span{ width:88%; }

    .plan-grid{
      display:grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap:20px;
    }
    .plan-card{
      border-radius:28px;
      background: linear-gradient(180deg, rgba(255,255,255,.075), rgba(255,255,255,.05));
      border:1px solid rgba(255,255,255,.10);
      box-shadow: var(--shadow-soft);
      padding:22px;
      min-height:100%;
      position:relative;
      overflow:hidden;
    }
    .plan-card::before{
      content:"";
      position:absolute;
      inset:-1px;
      background:
        radial-gradient(circle at 88% 10%, rgba(53,208,255,.11), transparent 24%),
        radial-gradient(circle at 12% 84%, rgba(178,58,111,.10), transparent 28%);
      pointer-events:none;
    }
    .plan-card .index{
      width:max-content;
      padding:7px 10px;
      border-radius:999px;
      background: rgba(53,208,255,.08);
      border:1px solid rgba(53,208,255,.14);
      color:#dcf6ff;
      font-size:12px;
      font-weight:700;
      position:relative;
      z-index:1;
    }
    .plan-card h3{
      margin:14px 0 10px;
      color:var(--title);
      font-size:20px;
      line-height:1.35;
      position:relative;
      z-index:1;
    }
    .plan-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.86;
      position:relative;
      z-index:1;
    }
    .step-list{
      display:grid;
      gap:12px;
      margin-top:16px;
      position:relative;
      z-index:1;
    }
    .step{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:12px 0;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .step:first-child{ border-top:0; padding-top:0; }
    .step-num{
      width:28px;
      height:28px;
      border-radius:50%;
      flex:none;
      display:grid;
      place-items:center;
      background: linear-gradient(135deg, rgba(30,94,255,.22), rgba(178,58,111,.16));
      border:1px solid rgba(53,208,255,.18);
      color:var(--title);
      font-size:12px;
      font-weight:700;
    }
    .step strong{
      display:block;
      color:var(--title);
      font-size:14px;
      margin-bottom:3px;
    }
    .step span{
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }
    .matrix{
      margin-top:20px;
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap:16px;
    }
    .device{
      padding:18px;
      border-radius:22px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      min-height:150px;
    }
    .device h4{
      margin:0 0 10px;
      color:var(--title);
      font-size:16px;
    }
    .device p{
      margin:0;
      color:var(--muted);
      font-size:13px;
      line-height:1.75;
    }
    .device ul{
      margin:14px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:8px;
    }
    .device li{
      display:flex;
      align-items:flex-start;
      gap:8px;
      color:#dfe7f4;
      font-size:13px;
      line-height:1.6;
    }
    .device li::before{
      content:"";
      width:7px;
      height:7px;
      border-radius:50%;
      background: var(--cyan);
      box-shadow: 0 0 0 4px rgba(53,208,255,.10);
      margin-top:7px;
      flex:none;
    }
    .showcase-grid{
      display:grid;
      grid-template-columns: 1.1fr .9fr;
      gap:18px;
    }
    .showcase-panel{
      padding:22px;
      border-radius:28px;
      background: linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.045));
      border:1px solid rgba(255,255,255,.10);
      box-shadow: var(--shadow-soft);
      overflow:hidden;
      position:relative;
    }
    .showcase-panel::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 82% 18%, rgba(178,58,111,.12), transparent 22%),
        radial-gradient(circle at 10% 78%, rgba(53,208,255,.11), transparent 24%);
      pointer-events:none;
    }
    .showcase-panel h3{
      margin:0 0 10px;
      color:var(--title);
      font-size:21px;
      line-height:1.35;
      position:relative;
      z-index:1;
    }
    .showcase-panel p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.85;
      position:relative;
      z-index:1;
    }
    .abstract-list{
      margin-top:18px;
      display:grid;
      gap:12px;
      position:relative;
      z-index:1;
    }
    .abstract-row{
      display:flex;
      align-items:center;
      gap:12px;
      padding:12px 14px;
      border-radius:18px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
    }
    .abstract-swatch{
      width:46px;
      height:46px;
      border-radius:16px;
      background:
        linear-gradient(135deg, rgba(30,94,255,.24), rgba(178,58,111,.18)),
        linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,0));
      border:1px solid rgba(53,208,255,.14);
      flex:none;
      position:relative;
      overflow:hidden;
    }
    .abstract-swatch::before{
      content:"";
      position:absolute;
      inset:10px 12px;
      border-radius:12px;
      border:1px solid rgba(255,255,255,.12);
      background: rgba(255,255,255,.05);
    }
    .abstract-row strong{
      display:block;
      color:var(--title);
      font-size:14px;
      margin-bottom:4px;
    }
    .abstract-row span{
      color:var(--muted);
      font-size:13px;
      line-height:1.55;
    }
    .faq-grid{
      display:grid;
      gap:14px;
    }
    details.faq-item{
      border-radius:22px;
      background: rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      overflow:hidden;
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
    }
    details.faq-item[open]{
      border-color: rgba(53,208,255,.18);
      background: rgba(53,208,255,.04);
    }
    details.faq-item summary{
      list-style:none;
      cursor:pointer;
      padding:18px 20px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      color:var(--title);
      font-size:15px;
      font-weight:700;
    }
    details.faq-item summary::-webkit-details-marker{ display:none; }
    .faq-toggle{
      width:26px;
      height:26px;
      border-radius:50%;
      flex:none;
      border:1px solid rgba(255,255,255,.12);
      background: rgba(255,255,255,.05);
      position:relative;
    }
    .faq-toggle::before,
    .faq-toggle::after{
      content:"";
      position:absolute;
      left:50%;
      top:50%;
      width:10px;
      height:2px;
      background: currentColor;
      border-radius:999px;
      transform: translate(-50%,-50%);
    }
    .faq-toggle::after{
      transform: translate(-50%,-50%) rotate(90deg);
      transition: opacity .2s ease;
    }
    details[open] .faq-toggle::after{
      opacity:0;
    }
    .faq-content{
      padding:0 20px 18px;
      color:var(--muted);
      font-size:14px;
      line-height:1.85;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .contact-grid{
      display:grid;
      grid-template-columns: .96fr 1.04fr;
      gap:18px;
    }
    .contact-info,
    .contact-form{
      padding:24px;
      border-radius:28px;
      background: linear-gradient(180deg, rgba(255,255,255,.075), rgba(255,255,255,.045));
      border:1px solid rgba(255,255,255,.10);
      box-shadow: var(--shadow-soft);
      position:relative;
      overflow:hidden;
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
    }
    .contact-info::before,
    .contact-form::before{
      content:"";
      position:absolute;
      inset:0;
      background:
        radial-gradient(circle at 84% 12%, rgba(53,208,255,.10), transparent 24%),
        radial-gradient(circle at 8% 78%, rgba(178,58,111,.10), transparent 26%);
      pointer-events:none;
    }
    .contact-info h3,
    .contact-form h3{
      margin:0 0 12px;
      color:var(--title);
      font-size:21px;
      line-height:1.35;
      position:relative;
      z-index:1;
    }
    .contact-info p,
    .contact-form p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.85;
      position:relative;
      z-index:1;
    }
    .info-list{
      margin:18px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:12px;
      position:relative;
      z-index:1;
    }
    .info-list li{
      display:flex;
      align-items:flex-start;
      gap:10px;
      font-size:14px;
      line-height:1.7;
      color:#dce6f4;
    }
    .info-list li::before{
      content:"";
      width:9px;
      height:9px;
      border-radius:50%;
      background: var(--orange);
      box-shadow: 0 0 0 4px rgba(255,184,107,.10);
      margin-top:8px;
      flex:none;
    }
    .form-grid{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:14px;
      position:relative;
      z-index:1;
      margin-top:18px;
    }
    .field{
      display:flex;
      flex-direction:column;
      gap:8px;
    }
    .field.full{
      grid-column:1 / -1;
    }
    .field label{
      font-size:13px;
      color:#dce6f4;
      font-weight:600;
    }
    .field input,
    .field select,
    .field textarea{
      width:100%;
      border-radius:16px;
      border:1px solid rgba(255,255,255,.10);
      background: rgba(7,10,18,.45);
      color: var(--title);
      padding:14px 15px;
      transition: border-color .2s ease, background .2s ease, box-shadow .2s ease, transform .2s ease;
      outline:none;
    }
    .field textarea{
      min-height:130px;
      resize:vertical;
    }
    .field input::placeholder,
    .field textarea::placeholder{
      color:#748093;
    }
    .field input:focus,
    .field select:focus,
    .field textarea:focus{
      border-color: rgba(53,208,255,.26);
      box-shadow: var(--focus);
      background: rgba(7,10,18,.62);
    }
    .form-note{
      margin-top:14px;
      color:var(--muted);
      font-size:12px;
      line-height:1.8;
      position:relative;
      z-index:1;
    }
    .form-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:18px;
      position:relative;
      z-index:1;
    }
    .footer{
      margin-top:88px;
      padding:26px 0 34px;
      border-top:1px solid rgba(255,255,255,.08);
      color:var(--muted);
    }
    .footer-wrap{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:22px;
      flex-wrap:wrap;
    }
    .footer-brand{
      display:flex;
      flex-direction:column;
      gap:10px;
      min-width:min(100%, 420px);
    }
    .footer-brand strong{
      color:var(--title);
      font-size:16px;
      line-height:1.45;
    }
    .footer-brand p{
      margin:0;
      font-size:13px;
      line-height:1.8;
      max-width:52em;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      gap:12px 14px;
      align-items:center;
    }
    .footer-links a{
      color:#dce6f4;
      font-size:13px;
      line-height:1.6;
      padding:6px 0;
      text-decoration:underline;
      text-decoration-color: rgba(220,230,244,.24);
      text-underline-offset: 3px;
    }
    .footer-meta{
      display:flex;
      flex-direction:column;
      gap:8px;
      align-items:flex-end;
      text-align:right;
      font-size:12px;
      line-height:1.8;
    }
    .footer-meta .domain{
      color:#dce6f4;
      text-decoration:underline;
      text-decoration-color: rgba(220,230,244,.24);
      text-underline-offset: 3px;
    }

    @media (max-width: 1199px){
      :root{
        --sidebar-w: var(--sidebar-w-collapsed);
      }
      .sidebar{
        width:var(--sidebar-w-collapsed);
        padding:18px 12px 16px;
      }
      .brand-text,
      .nav-label,
      .nav-label-small,
      .sidebar-note{
        display:none;
      }
      .brand{
        justify-content:center;
        padding:8px 0 10px;
      }
      .nav-link{
        justify-content:center;
        padding:14px 10px;
      }
      .nav-link::before{
        display:none;
      }
      .nav-icon{
        margin:0;
      }
      .sidebar-bottom{
        align-items:center;
        padding:12px 0 0;
      }
      .content{
        margin-left:var(--sidebar-w-collapsed);
      }
      .page{
        width:min(var(--content-max), calc(100vw - var(--sidebar-w-collapsed)));
        padding-left:24px;
        padding-right:24px;
      }
      .bento-grid,
      .showcase-grid,
      .contact-grid{
        grid-template-columns:1fr;
      }
      .plan-grid{
        grid-template-columns:1fr 1fr;
      }
      .metrics-grid,
      .category-grid{
        grid-template-columns: repeat(2, minmax(0,1fr));
      }
      .strip{
        grid-template-columns: repeat(2, minmax(0,1fr));
      }
      .hero-grid{
        grid-template-columns:1fr;
      }
    }
    @media (max-width: 767px){
      .sidebar{
        width:300px;
        transform: translateX(-104%);
        transition: transform .24s ease;
        z-index:70;
      }
      body.menu-open .sidebar{
        transform: translateX(0);
      }
      body.menu-open .drawer-backdrop{
        opacity:1;
        visibility:visible;
      }
      .topbar{
        display:flex;
      }
      .content{
        margin-left:0;
        padding-top:68px;
      }
      .page{
        width:100%;
        padding: 18px 16px 44px;
      }
      .section{
        margin-top:58px;
      }
      .strip,
      .metrics-grid,
      .category-grid,
      .plan-grid,
      .matrix,
      .form-grid{
        grid-template-columns:1fr;
      }
      .hero h1{
        max-width:none;
      }
      .hero .lead{
        font-size:16px;
      }
      .section-head{
        flex-direction:column;
        align-items:flex-start;
      }
      .section-head p{
        max-width:none;
      }
      .cta-row .btn,
      .form-actions .btn{
        width:100%;
      }
      .btn{
        min-height:48px;
      }
      .footer-wrap,
      .footer-meta{
        align-items:flex-start;
        text-align:left;
      }
      .footer-brand{
        min-width:0;
      }
    }
    @media (max-width: 520px){
      .hero h1{
        font-size:clamp(30px, 8vw, 40px);
      }
      .hero-panel,
      .bento-card,
      .category-card,
      .plan-card,
      .showcase-panel,
      .contact-info,
      .contact-form{
        border-radius:22px;
      }
      .player-thumb{
        height:150px;
      }
      .panel-stats{
        grid-template-columns:1fr;
      }
      .card-body h3,
      .bento-card h3,
      .plan-card h3,
      .contact-info h3,
      .contact-form h3{
        font-size:19px;
      }
      .hero-tags{
        gap:8px;
      }
      .tag{
        font-size:11px;
        padding:8px 10px;
      }
      .footer{
        margin-top:64px;
      }
    }
    .sr-only{
      position:absolute;
      width:1px;
      height:1px;
      padding:0;
      margin:-1px;
      overflow:hidden;
      clip:rect(0,0,0,0);
      white-space:nowrap;
      border:0;
    }

/* roulang page: category1 */
:root{
      --bg:#070B14;
      --bg-2:#080A12;
      --panel:rgba(255,255,255,.065);
      --panel-strong:rgba(255,255,255,.095);
      --panel-soft:rgba(255,255,255,.045);
      --line:rgba(255,255,255,.11);
      --line-cyan:rgba(53,208,255,.22);
      --text:#D8DEE9;
      --title:#F4F7FB;
      --muted:#8F9AAF;
      --muted-2:#AAB4C8;
      --blue:#1E5EFF;
      --cyan:#35D0FF;
      --wine:#B23A6F;
      --wine-2:#7B2354;
      --warn:#FFB86B;
      --success:#78E2B0;
      --radius-xl:30px;
      --radius-lg:24px;
      --radius-md:18px;
      --radius-sm:14px;
      --shadow:0 24px 70px rgba(0,0,0,.42);
      --shadow-soft:0 16px 44px rgba(0,0,0,.28);
      --side:258px;
      --ease:180ms ease-out;
      --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","HarmonyOS Sans",Arial,sans-serif;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      font-family:var(--font);
      color:var(--text);
      line-height:1.75;
      background:
        radial-gradient(circle at 88% 6%, rgba(178,58,111,.24), transparent 34%),
        radial-gradient(circle at 8% 92%, rgba(30,94,255,.23), transparent 36%),
        radial-gradient(circle at 66% 52%, rgba(53,208,255,.07), transparent 31%),
        linear-gradient(135deg,var(--bg),var(--bg-2) 58%,#050711);
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      z-index:-2;
      background-image:
        linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
      background-size:44px 44px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.72), rgba(0,0,0,.18));
    }
    body::after{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      z-index:-1;
      opacity:.16;
      background:
        repeating-linear-gradient(0deg, rgba(255,255,255,.035) 0, rgba(255,255,255,.035) 1px, transparent 1px, transparent 5px);
    }

    a{color:inherit;text-decoration:none}
    img,svg{display:block;max-width:100%}
    button,input,textarea,select{font:inherit}
    button{border:0;cursor:pointer}
    ::selection{background:rgba(53,208,255,.28);color:var(--title)}
    :focus-visible{outline:3px solid rgba(53,208,255,.72);outline-offset:3px;border-radius:12px}

    .topbar{
      display:none;
      position:fixed;
      z-index:80;
      top:0;
      left:0;
      right:0;
      height:66px;
      padding:0 18px;
      align-items:center;
      justify-content:space-between;
      background:rgba(7,11,20,.78);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(18px);
      box-shadow:0 12px 40px rgba(0,0,0,.28);
    }
    .topbar-brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:0;
    }
    .brand-mark{
      width:46px;
      height:46px;
      border-radius:16px;
      display:grid;
      place-items:center;
      color:#fff;
      flex:0 0 auto;
      background:
        radial-gradient(circle at 72% 18%, rgba(53,208,255,.45), transparent 32%),
        linear-gradient(135deg, rgba(30,94,255,.96), rgba(178,58,111,.82));
      box-shadow:0 12px 28px rgba(30,94,255,.24), inset 0 0 0 1px rgba(255,255,255,.18);
    }
    .brand-mark svg{width:27px;height:27px;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
    .brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
    .brand-text strong{
      color:var(--title);
      font-size:14px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
      max-width:250px;
    }
    .brand-text span{color:var(--muted);font-size:12px;letter-spacing:.08em}
    .menu-btn{
      width:46px;
      height:46px;
      border-radius:15px;
      display:grid;
      place-items:center;
      color:var(--title);
      background:rgba(255,255,255,.075);
      border:1px solid var(--line);
      transition:transform var(--ease), border-color var(--ease), background var(--ease);
    }
    .menu-btn:hover{transform:translateY(-2px);border-color:var(--line-cyan);background:rgba(53,208,255,.09)}
    .menu-lines{width:20px;display:grid;gap:5px}
    .menu-lines span{height:2px;border-radius:999px;background:currentColor}

    .sidebar{
      position:fixed;
      left:0;
      top:0;
      bottom:0;
      width:var(--side);
      z-index:70;
      padding:24px 16px;
      background:linear-gradient(180deg, rgba(8,12,24,.82), rgba(5,7,17,.66));
      border-right:1px solid var(--line);
      backdrop-filter:blur(22px);
      box-shadow:18px 0 60px rgba(0,0,0,.26);
      display:flex;
      flex-direction:column;
    }
    .side-brand{
      display:flex;
      align-items:center;
      gap:12px;
      padding:8px 8px 22px;
      border-bottom:1px solid rgba(255,255,255,.08);
      margin-bottom:18px;
    }
    .side-brand .brand-text strong{max-width:160px}
    .nav-list{
      display:grid;
      gap:8px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .nav-link{
      position:relative;
      display:flex;
      align-items:center;
      gap:12px;
      min-height:48px;
      padding:12px 14px;
      border-radius:17px;
      color:var(--muted-2);
      border:1px solid transparent;
      transition:background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease);
    }
    .nav-link svg{
      width:21px;
      height:21px;
      flex:0 0 auto;
      fill:none;
      stroke:currentColor;
      stroke-width:1.8;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .nav-link span{font-weight:650;font-size:14px}
    .nav-link:hover{
      color:var(--title);
      transform:translateX(2px);
      background:rgba(255,255,255,.06);
      border-color:rgba(255,255,255,.11);
    }
    .nav-link.active{
      color:var(--title);
      background:linear-gradient(90deg, rgba(30,94,255,.26), rgba(53,208,255,.075));
      border-color:rgba(53,208,255,.2);
      box-shadow:inset 0 0 0 1px rgba(30,94,255,.1), 0 12px 28px rgba(30,94,255,.08);
    }
    .nav-link.active::before{
      content:"";
      position:absolute;
      left:-16px;
      top:12px;
      bottom:12px;
      width:3px;
      border-radius:999px;
      background:linear-gradient(180deg,var(--cyan),var(--blue));
      box-shadow:0 0 16px rgba(53,208,255,.72);
    }
    .side-bottom{
      margin-top:auto;
      display:grid;
      gap:12px;
      padding:14px 8px 0;
    }
    .age-card{
      border:1px solid rgba(255,184,107,.24);
      background:linear-gradient(135deg, rgba(255,184,107,.13), rgba(178,58,111,.08));
      border-radius:20px;
      padding:14px;
      color:var(--title);
    }
    .age-card strong{
      display:flex;
      align-items:center;
      gap:8px;
      font-size:14px;
      margin-bottom:4px;
    }
    .age-dot{
      width:9px;
      height:9px;
      border-radius:50%;
      background:var(--warn);
      box-shadow:0 0 14px rgba(255,184,107,.72);
    }
    .age-card span{display:block;color:var(--muted);font-size:12px;line-height:1.55}
    .side-domain{
      font-size:12px;
      color:var(--muted);
      padding:0 2px;
    }

    .drawer-backdrop{
      position:fixed;
      inset:0;
      z-index:89;
      background:rgba(0,0,0,.54);
      backdrop-filter:blur(5px);
      opacity:0;
      pointer-events:none;
      transition:opacity var(--ease);
    }
    .drawer{
      position:fixed;
      top:0;
      left:0;
      bottom:0;
      width:min(86vw,330px);
      z-index:90;
      padding:22px 16px;
      transform:translateX(-105%);
      transition:transform 260ms ease-out;
      background:rgba(7,11,20,.92);
      border-right:1px solid var(--line);
      backdrop-filter:blur(24px);
      box-shadow:30px 0 70px rgba(0,0,0,.42);
      display:flex;
      flex-direction:column;
    }
    body.nav-open .drawer{transform:translateX(0)}
    body.nav-open .drawer-backdrop{opacity:1;pointer-events:auto}
    .drawer-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding-bottom:16px;
      border-bottom:1px solid rgba(255,255,255,.08);
      margin-bottom:16px;
    }
    .drawer-close{
      width:42px;
      height:42px;
      border-radius:14px;
      color:var(--title);
      background:rgba(255,255,255,.07);
      border:1px solid var(--line);
    }

    .page{
      min-height:100vh;
      margin-left:var(--side);
    }
    .main{
      width:100%;
      max-width:1320px;
      margin:0 auto;
      padding:44px 44px 0;
    }
    .container{width:100%;max-width:1180px;margin:0 auto}
    .section{margin:92px 0}
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:26px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:9px;
      color:var(--cyan);
      font-size:13px;
      font-weight:700;
      letter-spacing:.08em;
      margin-bottom:12px;
    }
    .eyebrow::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--cyan);
      box-shadow:0 0 16px rgba(53,208,255,.8);
    }
    h1,h2,h3,p{margin-top:0}
    h1{
      color:var(--title);
      font-size:clamp(32px,4.7vw,56px);
      line-height:1.12;
      letter-spacing:-.04em;
      margin-bottom:18px;
    }
    h2{
      color:var(--title);
      font-size:clamp(25px,3vw,36px);
      line-height:1.2;
      letter-spacing:-.025em;
      margin-bottom:12px;
    }
    h3{
      color:var(--title);
      font-size:21px;
      line-height:1.35;
      margin-bottom:10px;
    }
    p{color:var(--muted-2);margin-bottom:0}
    .lead{font-size:17px;max-width:760px;color:#C8D1E2}
    .muted{color:var(--muted)}
    .badge-row,.tag-row{display:flex;flex-wrap:wrap;gap:10px}
    .badge,.tag{
      display:inline-flex;
      align-items:center;
      gap:7px;
      border-radius:999px;
      white-space:nowrap;
      border:1px solid rgba(255,255,255,.12);
      background:rgba(255,255,255,.06);
      color:var(--muted-2);
      font-size:13px;
      font-weight:650;
      line-height:1;
    }
    .badge{padding:10px 13px}
    .tag{padding:8px 11px}
    .badge.warn{color:#FFE0BB;border-color:rgba(255,184,107,.28);background:rgba(255,184,107,.1)}
    .badge.blue{color:#DCE8FF;border-color:rgba(30,94,255,.28);background:rgba(30,94,255,.13)}
    .badge.wine{color:#FFD4E7;border-color:rgba(178,58,111,.32);background:rgba(178,58,111,.13)}
    .tag.cyan{color:#CFF6FF;border-color:rgba(53,208,255,.24);background:rgba(53,208,255,.08)}
    .tag.wine{color:#FFD7E9;border-color:rgba(178,58,111,.24);background:rgba(178,58,111,.1)}
    .tag.warn{color:#FFE1BD;border-color:rgba(255,184,107,.25);background:rgba(255,184,107,.08)}

    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:48px;
      padding:13px 20px;
      border-radius:999px;
      border:1px solid transparent;
      color:var(--title);
      font-weight:750;
      transition:transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), filter var(--ease);
      user-select:none;
    }
    .btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
    .btn-primary{
      background:linear-gradient(135deg,var(--blue),var(--wine));
      box-shadow:0 16px 38px rgba(30,94,255,.22), 0 0 0 1px rgba(255,255,255,.08) inset;
    }
    .btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 22px 48px rgba(30,94,255,.28)}
    .btn-secondary{
      background:rgba(255,255,255,.055);
      border-color:rgba(255,255,255,.13);
    }
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(53,208,255,.32);background:rgba(53,208,255,.075)}
    .btn:active{transform:translateY(0) scale(.99)}

    .glass{
      position:relative;
      border:1px solid var(--line);
      background:linear-gradient(145deg, rgba(255,255,255,.085), rgba(255,255,255,.045));
      box-shadow:var(--shadow-soft);
      backdrop-filter:blur(18px);
      overflow:hidden;
    }
    .glass::before{
      content:"";
      position:absolute;
      inset:0;
      pointer-events:none;
      background:linear-gradient(135deg, rgba(255,255,255,.09), transparent 34%, rgba(53,208,255,.045));
      opacity:.72;
    }
    .glass > *{position:relative}

    .category-hero{
      position:relative;
      display:grid;
      grid-template-columns:minmax(0,1.12fr) minmax(320px,.72fr);
      gap:28px;
      align-items:stretch;
      padding-top:12px;
    }
    .hero-card{
      border-radius:var(--radius-xl);
      padding:38px;
      min-height:420px;
      display:flex;
      flex-direction:column;
      justify-content:center;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-top:28px;
    }
    .notice-strip{
      margin-top:24px;
      display:flex;
      align-items:flex-start;
      gap:12px;
      padding:15px 16px;
      border-radius:18px;
      border:1px solid rgba(255,184,107,.24);
      background:rgba(255,184,107,.08);
      color:#FFE2BF;
    }
    .notice-strip svg{
      width:20px;
      height:20px;
      flex:0 0 auto;
      margin-top:3px;
      fill:none;
      stroke:currentColor;
      stroke-width:2;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .notice-strip span{font-size:14px;line-height:1.65;color:#FFE2BF}
    .hero-panel{
      border-radius:var(--radius-xl);
      padding:24px;
      min-height:420px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .abstract-cover{
      position:relative;
      min-height:214px;
      border-radius:24px;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.12);
      background:
        radial-gradient(circle at 72% 22%, rgba(255,184,107,.2), transparent 28%),
        radial-gradient(circle at 18% 82%, rgba(53,208,255,.28), transparent 36%),
        linear-gradient(135deg, rgba(30,94,255,.52), rgba(178,58,111,.35), rgba(255,255,255,.05));
    }
    .abstract-cover::before{
      content:"";
      position:absolute;
      inset:0;
      backdrop-filter:blur(1px);
      background:
        linear-gradient(90deg, rgba(255,255,255,.08) 0 1px, transparent 1px 16px),
        linear-gradient(0deg, rgba(255,255,255,.07) 0 1px, transparent 1px 16px);
      opacity:.22;
    }
    .play-lock{
      position:absolute;
      left:50%;
      top:50%;
      transform:translate(-50%,-50%);
      width:76px;
      height:76px;
      border-radius:26px;
      display:grid;
      place-items:center;
      background:rgba(7,11,20,.42);
      border:1px solid rgba(255,255,255,.18);
      box-shadow:0 18px 42px rgba(0,0,0,.32), 0 0 40px rgba(53,208,255,.18);
    }
    .play-lock svg{width:36px;height:36px;fill:none;stroke:#fff;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
    .panel-stat{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:12px;
      margin-top:18px;
    }
    .mini-stat{
      padding:15px;
      border-radius:18px;
      background:rgba(255,255,255,.055);
      border:1px solid rgba(255,255,255,.1);
    }
    .mini-stat strong{display:block;color:var(--title);font-size:22px;line-height:1.1}
    .mini-stat span{display:block;color:var(--muted);font-size:12px;margin-top:6px}

    .filter-bar{
      border-radius:var(--radius-lg);
      padding:20px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
    }
    .filter-title{display:flex;align-items:center;gap:12px;color:var(--title);font-weight:750}
    .filter-icon{
      width:38px;
      height:38px;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:var(--cyan);
      background:rgba(53,208,255,.09);
      border:1px solid rgba(53,208,255,.2);
    }
    .filter-icon svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
    .filter-pills{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
    .pill{
      padding:10px 14px;
      border-radius:999px;
      color:#C9D4E8;
      background:rgba(255,255,255,.055);
      border:1px solid rgba(255,255,255,.12);
      font-size:13px;
      font-weight:700;
      transition:background var(--ease), border-color var(--ease), transform var(--ease), color var(--ease);
    }
    .pill:hover,.pill.active{
      color:var(--title);
      transform:translateY(-2px);
      border-color:rgba(53,208,255,.3);
      background:linear-gradient(135deg, rgba(30,94,255,.18), rgba(178,58,111,.12));
    }

    .index-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 330px;
      gap:28px;
      align-items:start;
    }
    .card-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:20px;
    }
    .content-card{
      border-radius:var(--radius-lg);
      padding:0;
      transition:transform var(--ease), border-color var(--ease), background var(--ease), box-shadow var(--ease);
    }
    .content-card:hover{
      transform:translateY(-4px);
      border-color:rgba(53,208,255,.24);
      background:linear-gradient(145deg, rgba(255,255,255,.11), rgba(255,255,255,.055));
      box-shadow:0 26px 62px rgba(0,0,0,.36), 0 0 34px rgba(53,208,255,.06);
    }
    .thumb{
      height:154px;
      border-radius:22px 22px 0 0;
      position:relative;
      overflow:hidden;
      border-bottom:1px solid rgba(255,255,255,.09);
      background:
        radial-gradient(circle at 72% 24%, rgba(255,184,107,.18), transparent 26%),
        linear-gradient(135deg, rgba(30,94,255,.54), rgba(178,58,111,.3), rgba(7,11,20,.54));
    }
    .thumb.variant-2{background:radial-gradient(circle at 20% 30%, rgba(53,208,255,.24), transparent 28%),linear-gradient(135deg, rgba(178,58,111,.42), rgba(30,94,255,.3), rgba(255,255,255,.05))}
    .thumb.variant-3{background:radial-gradient(circle at 78% 74%, rgba(53,208,255,.26), transparent 30%),linear-gradient(135deg, rgba(255,184,107,.12), rgba(30,94,255,.45), rgba(178,58,111,.22))}
    .thumb.variant-4{background:radial-gradient(circle at 24% 78%, rgba(178,58,111,.34), transparent 34%),linear-gradient(135deg, rgba(53,208,255,.18), rgba(30,94,255,.38), rgba(255,255,255,.05))}
    .thumb::before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(120deg, transparent, rgba(255,255,255,.09), transparent);
      transform:translateX(-120%);
      transition:transform 650ms ease-out;
    }
    .content-card:hover .thumb::before{transform:translateX(120%)}
    .thumb-badge{
      position:absolute;
      top:14px;
      left:14px;
      padding:7px 10px;
      border-radius:999px;
      color:#FFE5C6;
      font-size:12px;
      font-weight:800;
      background:rgba(255,184,107,.14);
      border:1px solid rgba(255,184,107,.26);
      backdrop-filter:blur(10px);
    }
    .thumb-icon{
      position:absolute;
      right:16px;
      bottom:16px;
      width:46px;
      height:46px;
      display:grid;
      place-items:center;
      border-radius:17px;
      background:rgba(7,11,20,.44);
      border:1px solid rgba(255,255,255,.16);
      color:var(--title);
    }
    .thumb-icon svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
    .card-body{padding:20px}
    .card-body h3{font-size:20px}
    .card-body p{font-size:14.5px;line-height:1.72}
    .card-meta{
      margin-top:16px;
      padding-top:15px;
      border-top:1px solid rgba(255,255,255,.08);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      color:var(--muted);
      font-size:12px;
    }
    .card-link{
      color:#CFF6FF;
      font-weight:750;
      display:inline-flex;
      align-items:center;
      gap:6px;
    }

    .side-panel{
      position:sticky;
      top:28px;
      display:grid;
      gap:18px;
    }
    .info-card{
      border-radius:var(--radius-lg);
      padding:22px;
    }
    .info-card h3{font-size:19px}
    .check-list{
      display:grid;
      gap:13px;
      margin:16px 0 0;
      padding:0;
      list-style:none;
    }
    .check-list li{
      display:flex;
      gap:10px;
      color:#C8D1E2;
      font-size:14px;
      line-height:1.65;
    }
    .check-list li::before{
      content:"";
      width:8px;
      height:8px;
      margin-top:9px;
      border-radius:50%;
      flex:0 0 auto;
      background:var(--cyan);
      box-shadow:0 0 12px rgba(53,208,255,.58);
    }
    .hot-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}
    .privacy-score{
      display:grid;
      gap:13px;
      margin-top:16px;
    }
    .score-row{
      display:grid;
      grid-template-columns:78px 1fr 38px;
      gap:10px;
      align-items:center;
      color:var(--muted-2);
      font-size:13px;
    }
    .bar{
      height:8px;
      border-radius:999px;
      overflow:hidden;
      background:rgba(255,255,255,.08);
    }
    .bar span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--blue),var(--cyan));
      box-shadow:0 0 14px rgba(53,208,255,.28);
    }

    .feature-strip{
      display:grid;
      grid-template-columns:1.1fr .9fr .9fr;
      gap:20px;
    }
    .feature-card{
      border-radius:var(--radius-lg);
      padding:24px;
      min-height:210px;
      transition:transform var(--ease), border-color var(--ease), background var(--ease);
    }
    .feature-card:hover{transform:translateY(-4px);border-color:rgba(53,208,255,.23);background:rgba(255,255,255,.08)}
    .feature-card.large{
      min-height:260px;
      background:
        radial-gradient(circle at 85% 16%, rgba(178,58,111,.18), transparent 32%),
        linear-gradient(145deg, rgba(255,255,255,.09), rgba(255,255,255,.045));
    }
    .feature-num{
      color:var(--cyan);
      font-size:13px;
      font-weight:900;
      letter-spacing:.12em;
      margin-bottom:16px;
    }

    .flow{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:16px;
      counter-reset:flow;
    }
    .flow-step{
      counter-increment:flow;
      border-radius:var(--radius-lg);
      padding:22px;
      min-height:190px;
    }
    .flow-step::after{
      content:"0" counter(flow);
      position:absolute;
      right:18px;
      top:14px;
      color:rgba(255,255,255,.08);
      font-size:40px;
      font-weight:900;
      line-height:1;
    }
    .flow-step h3{font-size:18px;padding-right:50px}
    .flow-step p{font-size:14.5px}

    .faq-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:18px;
    }
    details.faq{
      border-radius:var(--radius-lg);
      padding:0;
      overflow:hidden;
    }
    details.faq summary{
      list-style:none;
      cursor:pointer;
      padding:20px 22px;
      color:var(--title);
      font-weight:760;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
    }
    details.faq summary::-webkit-details-marker{display:none}
    details.faq summary::after{
      content:"+";
      width:28px;
      height:28px;
      border-radius:50%;
      display:grid;
      place-items:center;
      color:var(--cyan);
      background:rgba(53,208,255,.09);
      border:1px solid rgba(53,208,255,.19);
      flex:0 0 auto;
      transition:transform var(--ease), background var(--ease);
    }
    details.faq[open] summary::after{content:"−";background:rgba(178,58,111,.12);color:#FFD8EA}
    details.faq p{
      padding:0 22px 22px;
      font-size:14.5px;
      border-top:1px solid rgba(255,255,255,.08);
      padding-top:16px;
    }

    .cta{
      border-radius:32px;
      padding:34px;
      display:grid;
      grid-template-columns:minmax(0,1fr) auto;
      gap:24px;
      align-items:center;
      background:
        radial-gradient(circle at 92% 20%, rgba(178,58,111,.24), transparent 32%),
        radial-gradient(circle at 15% 85%, rgba(53,208,255,.16), transparent 34%),
        linear-gradient(135deg, rgba(255,255,255,.09), rgba(255,255,255,.045));
    }
    .cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}

    .footer{
      margin-top:100px;
      border-top:1px solid rgba(255,255,255,.1);
      background:linear-gradient(180deg, rgba(255,255,255,.035), rgba(0,0,0,.18));
    }
    .footer-wrap{
      max-width:1320px;
      margin:0 auto;
      padding:34px 44px;
      display:grid;
      grid-template-columns:minmax(0,1.25fr) minmax(220px,.65fr) minmax(220px,.75fr);
      gap:28px;
    }
    .footer-brand strong{
      display:block;
      color:var(--title);
      font-size:17px;
      margin-bottom:10px;
    }
    .footer-brand p{
      font-size:13.5px;
      line-height:1.75;
      margin:0 0 8px;
      color:var(--muted);
    }
    .footer-links,.footer-meta{
      display:grid;
      align-content:start;
      gap:10px;
    }
    .footer-links a,.domain{
      color:#CFE8FF;
      transition:color var(--ease), opacity var(--ease);
    }
    .footer-links a{
      font-size:14px;
      padding:4px 0;
    }
    .footer-links a:hover,.domain:hover{color:var(--cyan)}
    .footer-meta span{
      color:var(--muted);
      font-size:13px;
      line-height:1.6;
      padding-left:12px;
      border-left:2px solid rgba(53,208,255,.25);
    }

    @media (max-width:1199px){
      :root{--side:92px}
      .sidebar{width:var(--side);padding:22px 12px}
      .side-brand{justify-content:center;padding:6px 0 20px}
      .side-brand .brand-text,.nav-link span,.side-domain,.age-card span,.age-card strong span{display:none}
      .nav-link{justify-content:center;padding:13px 10px}
      .nav-link.active::before{left:-12px}
      .age-card{padding:12px;display:grid;place-items:center}
      .age-card strong{margin:0}
      .index-layout{grid-template-columns:1fr}
      .side-panel{position:static;grid-template-columns:repeat(3,minmax(0,1fr))}
      .feature-strip{grid-template-columns:1fr 1fr}
      .feature-card.large{grid-column:1/-1}
      .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
      .footer-wrap{grid-template-columns:1fr 1fr}
      .footer-brand{grid-column:1/-1}
    }

    @media (max-width:991px){
      .topbar{display:flex}
      .sidebar{display:none}
      .page{margin-left:0;padding-top:66px}
      .main{padding:28px 24px 0}
      .category-hero{grid-template-columns:1fr}
      .hero-card,.hero-panel{min-height:auto}
      .section{margin:70px 0}
      .filter-bar{align-items:flex-start;flex-direction:column}
      .filter-pills{justify-content:flex-start}
      .side-panel{grid-template-columns:1fr}
      .feature-strip{grid-template-columns:1fr}
      .faq-grid{grid-template-columns:1fr}
      .cta{grid-template-columns:1fr}
      .cta-actions{justify-content:flex-start}
    }

    @media (max-width:767px){
      .main{padding:24px 18px 0}
      .hero-card{padding:26px}
      .hero-panel{padding:20px}
      .badge-row{gap:8px}
      .hero-actions .btn,.cta-actions .btn{width:100%}
      .filter-bar{padding:18px}
      .card-grid{grid-template-columns:1fr}
      .panel-stat{grid-template-columns:1fr 1fr}
      .flow{grid-template-columns:1fr}
      .section-head{display:block}
      .footer-wrap{grid-template-columns:1fr;padding:30px 18px}
      .footer{margin-top:72px}
    }

    @media (max-width:520px){
      .brand-text strong{max-width:190px}
      h1{font-size:32px}
      h2{font-size:25px}
      .hero-card{padding:22px;border-radius:24px}
      .abstract-cover{min-height:178px}
      .panel-stat{grid-template-columns:1fr}
      .filter-title{align-items:flex-start}
      .pill{width:100%;text-align:center}
      .cta{padding:24px;border-radius:24px}
      .thumb{height:138px}
    }

/* roulang page: category2 */
:root{
      --bg:#070B14;
      --bg-2:#0A1020;
      --bg-3:#0D1326;
      --panel:rgba(12,17,33,.72);
      --panel-strong:rgba(15,21,40,.92);
      --line:rgba(255,255,255,.10);
      --line-2:rgba(53,208,255,.18);
      --text:#D8DEE9;
      --muted:#8F9AAF;
      --title:#F4F7FB;
      --brand:#1E5EFF;
      --brand-2:#B23A6F;
      --accent:#35D0FF;
      --accent-2:#8C5CFF;
      --warn:#FFB86B;
      --ok:#63E6B0;
      --shadow:0 24px 72px rgba(0,0,0,.38);
      --shadow-soft:0 12px 32px rgba(0,0,0,.22);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
      --radius-sm:12px;
      --max:1280px;
      --sidebar:268px;
      --topbar:72px;
      --gap:24px;
      --trans:180ms ease-out;
      --ring:0 0 0 3px rgba(53,208,255,.22), 0 0 0 1px rgba(53,208,255,.18) inset;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      font-family:PingFang SC,Microsoft YaHei,Noto Sans SC,HarmonyOS Sans,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;
      color:var(--text);
      line-height:1.75;
      background:
        radial-gradient(900px 520px at 86% 10%, rgba(178,58,111,.22), transparent 58%),
        radial-gradient(760px 460px at 4% 86%, rgba(30,94,255,.20), transparent 56%),
        radial-gradient(520px 320px at 72% 82%, rgba(53,208,255,.08), transparent 60%),
        linear-gradient(180deg, #050810 0%, #070B14 24%, #080D18 100%);
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background:
        linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
      background-size:48px 48px;
      mask-image:linear-gradient(180deg, rgba(0,0,0,.36), transparent 82%);
      opacity:.18;
      z-index:0;
    }
    ::selection{background:rgba(53,208,255,.28); color:#fff}
    a{color:inherit; text-decoration:none}
    button,input,select,textarea{font:inherit}
    img{max-width:100%; display:block}
    .skip-link{
      position:absolute;
      left:-999px;
      top:12px;
      padding:12px 16px;
      z-index:9999;
      border-radius:999px;
      background:#fff;
      color:#111;
    }
    .skip-link:focus{left:16px; outline:none; box-shadow:var(--ring)}
    .topbar{
      position:fixed;
      inset:0 0 auto 0;
      height:var(--topbar);
      z-index:120;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:0 18px 0 20px;
      background:rgba(7,11,20,.76);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(255,255,255,.08);
      box-shadow:0 8px 30px rgba(0,0,0,.22);
    }
    .topbar-brand{
      display:flex;
      align-items:center;
      gap:14px;
      min-width:0;
    }
    .brand-mark{
      width:44px;
      height:44px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:
        linear-gradient(145deg, rgba(30,94,255,.22), rgba(178,58,111,.22));
      border:1px solid rgba(255,255,255,.10);
      box-shadow:0 10px 24px rgba(0,0,0,.24), 0 0 0 1px rgba(53,208,255,.08) inset;
      flex:none;
    }
    .brand-mark svg{
      width:24px;
      height:24px;
      fill:none;
      stroke:#EAF2FF;
      stroke-width:1.7;
      stroke-linecap:round;
      stroke-linejoin:round;
      filter:drop-shadow(0 0 10px rgba(53,208,255,.14));
    }
    .brand-text{
      display:flex;
      flex-direction:column;
      gap:2px;
      min-width:0;
    }
    .brand-text strong{
      color:var(--title);
      font-size:15px;
      letter-spacing:.02em;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .brand-text span{
      color:var(--muted);
      font-size:12px;
      letter-spacing:.18em;
      text-transform:uppercase;
    }
    .menu-btn{
      width:46px;
      height:46px;
      border:none;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.04));
      color:#fff;
      border:1px solid rgba(255,255,255,.10);
      cursor:pointer;
      transition:transform var(--trans), border-color var(--trans), background var(--trans), box-shadow var(--trans);
      flex:none;
    }
    .menu-btn:hover{transform:translateY(-1px); border-color:rgba(53,208,255,.22); box-shadow:0 12px 28px rgba(0,0,0,.22)}
    .menu-btn:active{transform:translateY(0)}
    .menu-btn:focus-visible{outline:none; box-shadow:var(--ring)}
    .menu-lines{
      width:18px;
      display:grid;
      gap:4px;
    }
    .menu-lines span{
      height:2px;
      border-radius:999px;
      background:linear-gradient(90deg, #fff, rgba(255,255,255,.72));
    }

    .shell{
      position:relative;
      z-index:1;
    }
    .sidebar{
      position:fixed;
      inset:var(--topbar) auto 0 0;
      width:var(--sidebar);
      display:flex;
      flex-direction:column;
      gap:18px;
      padding:22px 18px 18px;
      background:rgba(7,11,20,.72);
      backdrop-filter:blur(20px);
      border-right:1px solid rgba(255,255,255,.08);
      box-shadow:18px 0 48px rgba(0,0,0,.18);
      overflow:auto;
      z-index:110;
    }
    .sidebar::-webkit-scrollbar{width:8px}
    .sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12); border-radius:999px}
    .sidebar-brand{
      display:flex;
      align-items:center;
      gap:12px;
      padding:6px 8px 16px;
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .sidebar-brand .brand-mark{
      width:42px;
      height:42px;
      border-radius:14px;
    }
    .sidebar-brand .brand-text strong{font-size:14px}
    .sidebar-brand .brand-text span{font-size:11px}
    .nav-label{
      font-size:12px;
      color:var(--muted);
      letter-spacing:.16em;
      text-transform:uppercase;
      padding:0 8px;
    }
    .side-nav{
      display:grid;
      gap:10px;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
      gap:12px;
      min-height:54px;
      padding:13px 14px 13px 16px;
      border-radius:18px;
      color:var(--text);
      background:transparent;
      border:1px solid transparent;
      transition:transform var(--trans), background var(--trans), border-color var(--trans), box-shadow var(--trans), color var(--trans);
    }
    .nav-item::before{
      content:"";
      position:absolute;
      left:0;
      top:10px;
      bottom:10px;
      width:3px;
      border-radius:999px;
      background:transparent;
      transition:background var(--trans), box-shadow var(--trans);
    }
    .nav-item .icon{
      width:18px;
      height:18px;
      flex:none;
      color:var(--accent);
      opacity:.95;
    }
    .nav-item .icon svg{
      width:100%;
      height:100%;
      fill:none;
      stroke:currentColor;
      stroke-width:1.8;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .nav-item span{
      font-size:14px;
      line-height:1.4;
      font-weight:600;
    }
    .nav-item:hover{
      transform:translateX(3px);
      background:rgba(255,255,255,.05);
      border-color:rgba(255,255,255,.08);
      box-shadow:0 10px 24px rgba(0,0,0,.18);
    }
    .nav-item:focus-visible{
      outline:none;
      box-shadow:var(--ring);
    }
    .nav-item.active{
      background:linear-gradient(135deg, rgba(30,94,255,.18), rgba(178,58,111,.12));
      border-color:rgba(53,208,255,.22);
      box-shadow:0 14px 34px rgba(0,0,0,.26);
      color:#fff;
    }
    .nav-item.active::before{
      background:linear-gradient(180deg, var(--accent), var(--brand));
      box-shadow:0 0 12px rgba(53,208,255,.28);
    }
    .nav-item.active .icon{color:#fff}
    .sidebar-panel{
      display:grid;
      gap:12px;
      padding:16px;
      border-radius:22px;
      background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
      border:1px solid rgba(255,255,255,.08);
      box-shadow:var(--shadow-soft);
    }
    .sidebar-panel strong{
      color:var(--title);
      font-size:14px;
      line-height:1.5;
    }
    .sidebar-panel p{
      margin:0;
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }
    .sidebar-badge{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      padding:14px 16px;
      border-radius:18px;
      background:linear-gradient(135deg, rgba(255,184,107,.16), rgba(178,58,111,.10));
      border:1px solid rgba(255,184,107,.18);
      color:#FFE6C2;
      font-size:13px;
    }
    .sidebar-foot{
      margin-top:auto;
      padding-top:8px;
      color:var(--muted);
      font-size:12px;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .sidebar-foot .domain{
      color:#D9EEFF;
      text-decoration:underline;
      text-underline-offset:2px;
    }

    .scrim{
      position:fixed;
      inset:var(--topbar) 0 0 0;
      background:rgba(3,6,12,.54);
      backdrop-filter:blur(5px);
      opacity:0;
      pointer-events:none;
      transition:opacity var(--trans);
      z-index:104;
    }

    .content{
      margin-left:var(--sidebar);
      padding:calc(var(--topbar) + 28px) 34px 0;
    }
    .container{
      width:min(var(--max), 100%);
      margin:0 auto;
    }
    .section{
      margin-top:74px;
    }
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:16px;
      margin-bottom:24px;
    }
    .section-head h2{
      margin:0;
      color:var(--title);
      font-size:30px;
      line-height:1.2;
      letter-spacing:-.02em;
    }
    .section-head p{
      margin:0;
      max-width:680px;
      color:var(--muted);
      font-size:15px;
      line-height:1.8;
    }

    .hero{
      display:grid;
      grid-template-columns:minmax(0,1.12fr) minmax(340px,.88fr);
      gap:24px;
      align-items:stretch;
    }
    .hero-copy,
    .hero-panel,
    .panel,
    .metric-card,
    .feature-card,
    .timeline-item,
    .compat-card,
    .faq-card,
    .cta-card{
      border-radius:var(--radius-xl);
      background:
        linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.04)),
        rgba(10,15,28,.72);
      border:1px solid rgba(255,255,255,.08);
      box-shadow:var(--shadow);
      backdrop-filter:blur(18px);
    }
    .hero-copy{
      padding:34px;
      position:relative;
      overflow:hidden;
    }
    .hero-copy::after{
      content:"";
      position:absolute;
      right:-80px;
      top:-80px;
      width:280px;
      height:280px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(178,58,111,.20), rgba(178,58,111,0) 66%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:999px;
      background:rgba(255,184,107,.12);
      color:#FFD8A3;
      border:1px solid rgba(255,184,107,.18);
      font-size:12px;
      font-weight:700;
      letter-spacing:.08em;
      text-transform:uppercase;
    }
    .eyebrow .dot{
      width:7px;
      height:7px;
      border-radius:999px;
      background:var(--warn);
      box-shadow:0 0 0 4px rgba(255,184,107,.14);
    }
    .hero-copy h1{
      margin:18px 0 14px;
      color:var(--title);
      font-size:clamp(32px, 4vw, 54px);
      line-height:1.12;
      letter-spacing:-.03em;
    }
    .hero-copy .lead{
      margin:0;
      max-width:58ch;
      color:var(--text);
      font-size:16px;
      line-height:1.85;
    }
    .hero-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:9px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.06);
      border:1px solid rgba(255,255,255,.09);
      color:#EAF2FF;
      font-size:12px;
      letter-spacing:.03em;
      white-space:nowrap;
    }
    .badge b{font-weight:700}
    .badge-accent{
      background:linear-gradient(135deg, rgba(30,94,255,.18), rgba(178,58,111,.16));
      border-color:rgba(53,208,255,.16);
    }
    .badge-warn{
      color:#FFE4BF;
      background:rgba(255,184,107,.10);
      border-color:rgba(255,184,107,.18);
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:26px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:48px;
      padding:0 18px;
      border-radius:999px;
      border:1px solid transparent;
      cursor:pointer;
      transition:transform var(--trans), box-shadow var(--trans), background var(--trans), border-color var(--trans), color var(--trans);
      font-weight:700;
      letter-spacing:.02em;
      text-align:center;
    }
    .btn:focus-visible{
      outline:none;
      box-shadow:var(--ring);
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg, var(--brand), var(--brand-2));
      box-shadow:0 16px 28px rgba(30,94,255,.18), 0 8px 18px rgba(178,58,111,.12);
    }
    .btn-primary:hover{
      transform:translateY(-2px);
      box-shadow:0 20px 34px rgba(30,94,255,.24), 0 12px 22px rgba(178,58,111,.14);
    }
    .btn-secondary{
      color:#EEF4FF;
      background:rgba(255,255,255,.04);
      border-color:rgba(255,255,255,.12);
    }
    .btn-secondary:hover{
      transform:translateY(-2px);
      border-color:rgba(53,208,255,.22);
      background:rgba(255,255,255,.07);
    }
    .btn-warning{
      color:#2B1B00;
      background:linear-gradient(135deg, #FFD39C, #FFB86B);
      border-color:rgba(255,184,107,.28);
    }
    .btn-warning:hover{transform:translateY(-2px)}
    .hero-note{
      display:flex;
      align-items:flex-start;
      gap:10px;
      margin-top:22px;
      padding:14px 16px;
      border-radius:20px;
      background:rgba(255,255,255,.04);
      border:1px solid rgba(255,255,255,.08);
      color:var(--muted);
      font-size:13px;
      line-height:1.75;
    }
    .hero-note svg{
      width:18px;
      height:18px;
      flex:none;
      color:var(--accent);
      margin-top:2px;
    }
    .hero-panel{
      padding:22px;
      display:grid;
      gap:14px;
      overflow:hidden;
      position:relative;
    }
    .hero-panel::before{
      content:"";
      position:absolute;
      inset:auto -110px -120px auto;
      width:280px;
      height:280px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(53,208,255,.16), rgba(53,208,255,0) 68%);
      pointer-events:none;
    }
    .panel-grid{
      display:grid;
      grid-template-columns:repeat(2, minmax(0,1fr));
      gap:14px;
    }
    .metric-card{
      padding:18px;
      min-height:112px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      gap:10px;
    }
    .metric-card .kicker{
      color:var(--muted);
      font-size:12px;
      letter-spacing:.14em;
      text-transform:uppercase;
    }
    .metric-card strong{
      color:var(--title);
      font-size:24px;
      line-height:1;
      letter-spacing:-.03em;
    }
    .metric-card span{
      color:var(--muted);
      font-size:13px;
      line-height:1.65;
    }
    .preview-card{
      position:relative;
      padding:18px;
      min-height:170px;
      border-radius:24px;
      border:1px solid rgba(53,208,255,.15);
      background:
        radial-gradient(180px 120px at 84% 20%, rgba(178,58,111,.26), transparent 60%),
        radial-gradient(220px 150px at 18% 80%, rgba(30,94,255,.24), transparent 62%),
        linear-gradient(160deg, rgba(255,255,255,.08), rgba(255,255,255,.04));
      box-shadow:var(--shadow-soft);
      overflow:hidden;
    }
    .preview-card .cover{
      position:absolute;
      inset:0;
      background:
        linear-gradient(120deg, rgba(7,11,20,.20), rgba(7,11,20,.72)),
        linear-gradient(135deg, rgba(53,208,255,.18), rgba(178,58,111,.18));
    }
    .preview-card .content{
      position:relative;
      z-index:1;
      margin:0;
      padding:0;
    }
    .preview-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
    }
    .preview-top .tag{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 11px;
      border-radius:999px;
      background:rgba(7,11,20,.42);
      border:1px solid rgba(255,255,255,.10);
      color:#F1F5FF;
      font-size:12px;
    }
    .preview-top .tag svg{
      width:14px;
      height:14px;
      stroke:currentColor;
      fill:none;
      stroke-width:2;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .preview-title{
      margin:18px 0 10px;
      color:#fff;
      font-size:20px;
      line-height:1.35;
      letter-spacing:-.02em;
    }
    .preview-desc{
      margin:0;
      max-width:34ch;
      color:rgba(244,247,251,.84);
      font-size:13px;
      line-height:1.75;
    }
    .mini-tags{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:16px;
    }
    .mini-tag{
      padding:7px 10px;
      border-radius:999px;
      font-size:12px;
      color:#EAF2FF;
      background:rgba(7,11,20,.42);
      border:1px solid rgba(255,255,255,.08);
    }

    .feature-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:20px;
    }
    .feature-panel{
      padding:24px;
      border-radius:var(--radius-xl);
      background:linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.03));
      border:1px solid rgba(255,255,255,.08);
      box-shadow:var(--shadow);
    }
    .feature-panel h3,
    .cta-card h3{
      margin:0 0 10px;
      color:var(--title);
      font-size:22px;
      line-height:1.3;
    }
    .feature-panel p,
    .cta-card p{
      margin:0;
      color:var(--muted);
      font-size:15px;
      line-height:1.85;
    }
    .feature-list{
      display:grid;
      gap:14px;
      margin-top:18px;
    }
    .feature-item{
      display:flex;
      gap:14px;
      align-items:flex-start;
      padding:14px 0;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .feature-item:first-child{border-top:none; padding-top:0}
    .feature-icon{
      width:42px;
      height:42px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:rgba(30,94,255,.12);
      border:1px solid rgba(53,208,255,.14);
      color:#DFF5FF;
      flex:none;
      box-shadow:0 0 0 1px rgba(255,255,255,.03) inset;
    }
    .feature-icon svg{
      width:20px;
      height:20px;
      fill:none;
      stroke:currentColor;
      stroke-width:1.8;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .feature-item strong{
      display:block;
      color:var(--title);
      font-size:16px;
      margin-bottom:4px;
    }
    .feature-item span{
      display:block;
      color:var(--muted);
      font-size:13px;
      line-height:1.75;
    }
    .side-stack{
      display:grid;
      gap:20px;
    }
    .stack-card{
      padding:22px;
      border-radius:var(--radius-xl);
      background:
        linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.03)),
        rgba(9,13,25,.72);
      border:1px solid rgba(255,255,255,.08);
      box-shadow:var(--shadow-soft);
    }
    .stack-card h3{
      margin:0 0 10px;
      color:var(--title);
      font-size:19px;
      line-height:1.3;
    }
    .stack-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }
    .stack-list{
      margin:16px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:12px;
    }
    .stack-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:var(--text);
      font-size:14px;
      line-height:1.7;
    }
    .stack-list li::before{
      content:"";
      width:9px;
      height:9px;
      margin-top:8px;
      border-radius:999px;
      background:linear-gradient(180deg, var(--accent), var(--brand));
      box-shadow:0 0 12px rgba(53,208,255,.22);
      flex:none;
    }

    .timeline{
      display:grid;
      gap:16px;
    }
    .timeline-item{
      padding:20px 22px;
      display:grid;
      grid-template-columns:auto minmax(0,1fr);
      gap:18px;
      align-items:flex-start;
      position:relative;
    }
    .timeline-index{
      width:44px;
      height:44px;
      border-radius:16px;
      display:grid;
      place-items:center;
      font-weight:800;
      color:#fff;
      background:linear-gradient(135deg, rgba(30,94,255,.92), rgba(178,58,111,.88));
      box-shadow:0 14px 28px rgba(30,94,255,.16);
      flex:none;
    }
    .timeline-body h3{
      margin:0 0 6px;
      color:var(--title);
      font-size:18px;
      line-height:1.35;
    }
    .timeline-body p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.85;
    }
    .timeline-body .tags{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:12px;
    }
    .tag-pill{
      padding:6px 10px;
      border-radius:999px;
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      color:#DCE7F5;
      font-size:12px;
    }

    .compat-grid{
      display:grid;
      grid-template-columns:repeat(3, minmax(0,1fr));
      gap:16px;
    }
    .compat-card{
      padding:22px;
      min-height:210px;
      display:flex;
      flex-direction:column;
      gap:16px;
    }
    .compat-card .top{
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:12px;
    }
    .device-icon{
      width:48px;
      height:48px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, rgba(53,208,255,.14), rgba(30,94,255,.10));
      border:1px solid rgba(53,208,255,.16);
      color:#EAFBFF;
    }
    .device-icon svg{
      width:24px;
      height:24px;
      fill:none;
      stroke:currentColor;
      stroke-width:1.8;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .compat-card h3{
      margin:0;
      color:var(--title);
      font-size:18px;
      line-height:1.3;
    }
    .compat-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
      flex:1;
    }
    .compat-card .chips{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:auto;
    }

    .split-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:20px;
      align-items:start;
    }
    .notice-list{
      display:grid;
      gap:14px;
    }
    .notice-card{
      padding:18px 18px 18px 20px;
      border-radius:22px;
      border:1px solid rgba(255,255,255,.08);
      background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
    }
    .notice-card strong{
      display:block;
      color:var(--title);
      font-size:16px;
      margin-bottom:6px;
    }
    .notice-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }

    .faq{
      display:grid;
      gap:12px;
    }
    .faq-card{
      overflow:hidden;
    }
    .faq-card summary{
      list-style:none;
      cursor:pointer;
      padding:18px 20px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      color:var(--title);
      font-weight:700;
      font-size:15px;
    }
    .faq-card summary::-webkit-details-marker{display:none}
    .faq-card summary::after{
      content:"+";
      width:28px;
      height:28px;
      border-radius:999px;
      display:grid;
      place-items:center;
      flex:none;
      color:#fff;
      background:rgba(255,255,255,.06);
      border:1px solid rgba(255,255,255,.08);
      transition:transform var(--trans), background var(--trans);
    }
    .faq-card[open] summary::after{
      content:"–";
      background:rgba(53,208,255,.12);
      transform:rotate(0deg);
    }
    .faq-content{
      padding:0 20px 18px;
      color:var(--muted);
      font-size:14px;
      line-height:1.85;
    }

    .cta-card{
      padding:30px;
      position:relative;
      overflow:hidden;
    }
    .cta-card::before{
      content:"";
      position:absolute;
      right:-100px;
      top:-90px;
      width:260px;
      height:260px;
      border-radius:50%;
      background:radial-gradient(circle, rgba(30,94,255,.20), rgba(30,94,255,0) 66%);
      pointer-events:none;
    }
    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:20px;
    }

    .footer{
      margin-left:var(--sidebar);
      margin-top:76px;
      padding:0 34px 30px;
      position:relative;
      z-index:1;
    }
    .footer::before{
      content:"";
      display:block;
      height:1px;
      margin-bottom:22px;
      background:linear-gradient(90deg, transparent, rgba(255,255,255,.16), transparent);
    }
    .footer-wrap{
      width:min(var(--max), 100%);
      margin:0 auto;
      padding:28px;
      border-radius:28px;
      background:rgba(8,12,22,.72);
      border:1px solid rgba(255,255,255,.08);
      box-shadow:var(--shadow-soft);
      display:grid;
      grid-template-columns:1.5fr .9fr .9fr;
      gap:22px;
    }
    .footer-brand strong{
      display:block;
      color:var(--title);
      font-size:17px;
      line-height:1.4;
      margin-bottom:10px;
    }
    .footer-brand p{
      margin:0 0 10px;
      color:var(--muted);
      font-size:13px;
      line-height:1.9;
    }
    .footer-links{
      display:grid;
      gap:10px;
      align-content:start;
    }
    .footer-links a{
      display:inline-flex;
      align-items:center;
      gap:8px;
      width:max-content;
      color:#DBE9FF;
      font-size:13px;
      line-height:1.7;
      padding:6px 0;
      transition:color var(--trans), transform var(--trans), opacity var(--trans);
    }
    .footer-links a:hover{color:#fff; transform:translateX(2px)}
    .footer-links a:focus-visible{outline:none; box-shadow:var(--ring); border-radius:999px}
    .footer-meta{
      display:grid;
      gap:10px;
      align-content:start;
      color:var(--muted);
      font-size:12px;
      line-height:1.8;
    }
    .domain{
      color:#D9EEFF;
      text-decoration:underline;
      text-underline-offset:2px;
    }

    .section-divider{
      height:1px;
      margin:0;
      border:none;
      background:linear-gradient(90deg, transparent, rgba(255,255,255,.12), transparent);
    }

    .mobile-only{display:none}
    .desktop-only{display:block}

    @media (max-width: 1199px){
      :root{--sidebar:248px}
      .hero,
      .feature-grid,
      .split-grid{
        grid-template-columns:1fr;
      }
      .panel-grid,
      .compat-grid{
        grid-template-columns:repeat(2, minmax(0,1fr));
      }
      .footer-wrap{
        grid-template-columns:1fr 1fr;
      }
      .footer-meta{
        grid-column:1 / -1;
      }
    }
    @media (max-width: 991px){
      .content,
      .footer{
        margin-left:0;
      }
      .sidebar{
        width:min(86vw, 320px);
        transform:translateX(-105%);
        transition:transform var(--trans);
        box-shadow:26px 0 54px rgba(0,0,0,.32);
      }
      body.nav-open .sidebar{transform:translateX(0)}
      body.nav-open .scrim{
        opacity:1;
        pointer-events:auto;
      }
      .menu-btn{display:grid}
      .section{margin-top:58px}
      .content{padding:calc(var(--topbar) + 22px) 20px 0}
      .footer{padding:0 20px 24px}
      .footer-wrap{padding:22px}
      .mobile-only{display:block}
      .desktop-only{display:none}
    }
    @media (min-width: 992px){
      .menu-btn{display:none}
    }
    @media (max-width: 767px){
      :root{--topbar:64px}
      .topbar{
        padding:0 14px 0 16px;
      }
      .brand-text strong{font-size:14px}
      .hero-copy,
      .hero-panel,
      .feature-panel,
      .stack-card,
      .timeline-item,
      .compat-card,
      .cta-card,
      .notice-card,
      .faq-card summary,
      .faq-content{
        border-radius:22px;
      }
      .hero-copy{padding:24px}
      .hero-copy h1{font-size:clamp(30px, 7vw, 40px)}
      .hero-copy .lead{font-size:15px}
      .hero-actions,
      .cta-actions{
        flex-direction:column;
      }
      .btn{
        width:100%;
        min-height:46px;
      }
      .panel-grid,
      .compat-grid{
        grid-template-columns:1fr;
      }
      .section-head{
        flex-direction:column;
        align-items:flex-start;
      }
      .section-head h2{font-size:26px}
      .section-head p{font-size:14px}
      .footer-wrap{
        grid-template-columns:1fr;
      }
      .footer-links{
        gap:6px;
      }
    }
    @media (max-width: 520px){
      .content{padding:calc(var(--topbar) + 18px) 14px 0}
      .footer{padding:0 14px 22px}
      .hero-copy,
      .hero-panel,
      .feature-panel,
      .stack-card,
      .cta-card{
        padding:20px;
      }
      .timeline-item{
        padding:18px;
        grid-template-columns:1fr;
      }
      .timeline-index{width:40px; height:40px}
      .nav-item{
        min-height:50px;
        border-radius:16px;
      }
      .sidebar{
        padding:18px 14px 14px;
      }
      .sidebar-panel,
      .sidebar-badge{
        border-radius:18px;
      }
    }
    @media (prefers-reduced-motion: reduce){
      html{scroll-behavior:auto}
      *,*::before,*::after{
        animation-duration:.01ms !important;
        animation-iteration-count:1 !important;
        transition-duration:.01ms !important;
      }
    }

/* roulang page: category3 */
:root{
      --bg:#070B14;
      --bg-2:#0B1220;
      --panel:rgba(255,255,255,.06);
      --panel-2:rgba(255,255,255,.09);
      --panel-3:rgba(8,15,30,.72);
      --line:rgba(255,255,255,.10);
      --line-2:rgba(53,208,255,.18);
      --text:#F4F7FB;
      --muted:#98A4B8;
      --soft:#D9E1EE;
      --primary:#1E5EFF;
      --primary-2:#2F79FF;
      --accent:#35D0FF;
      --rose:#B23A6F;
      --rose-2:#9D2E5B;
      --warning:#FFB86B;
      --success:#78E08F;
      --shadow:0 20px 60px rgba(0,0,0,.35);
      --shadow-2:0 10px 30px rgba(0,0,0,.25);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:18px;
      --radius-sm:14px;
      --radius-pill:999px;
      --container:1240px;
      --sidebar:248px;
      --topbar:76px;
      --gap:24px;
      --transition:220ms cubic-bezier(.2,.8,.2,1);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      font-family:PingFang SC, Microsoft YaHei, Noto Sans SC, HarmonyOS Sans, system-ui, -apple-system, sans-serif;
      background:
        radial-gradient(1000px 600px at 88% 6%, rgba(178,58,111,.22), transparent 55%),
        radial-gradient(800px 520px at 8% 92%, rgba(53,208,255,.18), transparent 52%),
        linear-gradient(180deg, #070B14 0%, #080D18 48%, #060A12 100%);
      color:var(--text);
      line-height:1.75;
      letter-spacing:.01em;
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background:
        linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
      background-size:80px 80px;
      mask-image:linear-gradient(180deg, rgba(0,0,0,.55), rgba(0,0,0,.15) 35%, rgba(0,0,0,.55));
      opacity:.18;
      z-index:0;
    }
    body::after{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background:linear-gradient(180deg, rgba(255,255,255,.018), transparent 18%, transparent 82%, rgba(255,255,255,.014));
      opacity:.45;
      z-index:0;
    }
    ::selection{background:rgba(30,94,255,.35);color:#fff}
    a{
      color:inherit;
      text-decoration:none;
      transition:color var(--transition), background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition), opacity var(--transition);
    }
    img,svg{display:block;max-width:100%}
    button,input,textarea,select{
      font:inherit;
      color:inherit;
    }
    button{
      border:0;
      background:none;
      padding:0;
      cursor:pointer;
    }
    :focus-visible{
      outline:2px solid rgba(53,208,255,.95);
      outline-offset:3px;
      border-radius:12px;
    }
    .topbar{
      position:fixed;
      top:0;
      left:0;
      right:0;
      height:var(--topbar);
      z-index:40;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:0 22px;
      background:rgba(7,11,20,.72);
      border-bottom:1px solid rgba(255,255,255,.08);
      backdrop-filter:blur(20px) saturate(140%);
      -webkit-backdrop-filter:blur(20px) saturate(140%);
    }
    .topbar-brand{
      display:flex;
      align-items:center;
      gap:14px;
      min-width:0;
    }
    .brand-mark{
      width:46px;
      height:46px;
      border-radius:16px;
      background:
        linear-gradient(145deg, rgba(30,94,255,.95), rgba(178,58,111,.88));
      display:grid;
      place-items:center;
      box-shadow:0 10px 30px rgba(30,94,255,.22), 0 0 0 1px rgba(255,255,255,.08) inset;
      color:#F4F7FB;
      flex:0 0 auto;
    }
    .brand-mark svg{
      width:24px;
      height:24px;
      fill:currentColor;
    }
    .brand-text{
      display:flex;
      flex-direction:column;
      min-width:0;
    }
    .brand-text strong{
      font-size:15px;
      line-height:1.2;
      font-weight:800;
      letter-spacing:.02em;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .brand-text span{
      margin-top:3px;
      font-size:12px;
      color:var(--muted);
      letter-spacing:.18em;
      text-transform:uppercase;
    }
    .menu-btn{
      width:48px;
      height:48px;
      border-radius:16px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.09);
      box-shadow:var(--shadow-2);
      color:var(--text);
    }
    .menu-btn:hover{
      background:rgba(255,255,255,.09);
      border-color:rgba(53,208,255,.22);
      transform:translateY(-1px);
    }
    .menu-lines{
      width:18px;
      height:14px;
      display:grid;
      gap:3px;
    }
    .menu-lines span{
      display:block;
      height:2px;
      border-radius:999px;
      background:linear-gradient(90deg, #F4F7FB, #9FB6FF);
    }

    .drawer-mask{
      position:fixed;
      inset:0;
      background:rgba(4,8,16,.56);
      opacity:0;
      pointer-events:none;
      transition:opacity var(--transition);
      z-index:42;
    }
    .drawer-mask.is-open{
      opacity:1;
      pointer-events:auto;
    }
    .drawer{
      position:fixed;
      top:0;
      left:0;
      bottom:0;
      width:min(84vw, 320px);
      background:rgba(8,13,24,.95);
      border-right:1px solid rgba(255,255,255,.09);
      backdrop-filter:blur(18px) saturate(145%);
      -webkit-backdrop-filter:blur(18px) saturate(145%);
      transform:translateX(-100%);
      transition:transform var(--transition);
      z-index:43;
      display:flex;
      flex-direction:column;
      padding:90px 18px 18px;
      box-shadow:var(--shadow);
    }
    .drawer.is-open{transform:translateX(0)}
    .drawer-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:18px;
    }
    .drawer-head strong{
      font-size:14px;
      letter-spacing:.08em;
      color:var(--soft);
    }
    .drawer-close{
      width:40px;
      height:40px;
      border-radius:12px;
      display:grid;
      place-items:center;
      color:var(--muted);
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
    }
    .drawer-close:hover{
      color:var(--text);
      border-color:rgba(53,208,255,.22);
    }
    .drawer-nav{
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .nav-link{
      display:flex;
      align-items:center;
      gap:12px;
      padding:13px 14px;
      border-radius:16px;
      color:var(--soft);
      border:1px solid transparent;
      background:transparent;
      min-height:52px;
    }
    .nav-link .nav-icon{
      width:30px;
      height:30px;
      border-radius:11px;
      display:grid;
      place-items:center;
      background:rgba(255,255,255,.045);
      color:#DDE8FF;
      flex:0 0 auto;
      border:1px solid rgba(255,255,255,.06);
    }
    .nav-link .nav-icon svg{
      width:16px;
      height:16px;
      fill:none;
      stroke:currentColor;
      stroke-width:1.8;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .nav-link span{
      font-size:14px;
      font-weight:600;
      letter-spacing:.01em;
    }
    .nav-link:hover{
      background:rgba(255,255,255,.06);
      border-color:rgba(255,255,255,.08);
      transform:translateX(2px);
      color:#fff;
    }
    .nav-link.active{
      background:linear-gradient(90deg, rgba(30,94,255,.18), rgba(178,58,111,.11));
      border-color:rgba(53,208,255,.20);
      color:#fff;
      box-shadow:inset 3px 0 0 var(--accent), 0 12px 30px rgba(0,0,0,.18);
    }
    .nav-link.active .nav-icon{
      background:rgba(53,208,255,.14);
      border-color:rgba(53,208,255,.20);
    }
    .drawer-note{
      margin-top:auto;
      padding-top:16px;
      border-top:1px solid rgba(255,255,255,.08);
      color:var(--muted);
      font-size:12px;
      line-height:1.7;
      display:grid;
      gap:8px;
    }
    .drawer-note .mini-chip{
      width:max-content;
    }

    .shell{
      position:relative;
      z-index:1;
      display:block;
      min-height:100vh;
    }
    .desktop-nav{
      position:fixed;
      left:22px;
      top:96px;
      bottom:22px;
      width:var(--sidebar);
      z-index:30;
      display:block;
    }
    .nav-panel{
      height:100%;
      border-radius:26px;
      background:rgba(9,14,24,.66);
      border:1px solid rgba(255,255,255,.08);
      backdrop-filter:blur(18px) saturate(140%);
      -webkit-backdrop-filter:blur(18px) saturate(140%);
      box-shadow:var(--shadow);
      padding:18px 14px 14px;
      display:flex;
      flex-direction:column;
    }
    .nav-panel-top{
      margin-bottom:14px;
      padding:6px 8px 12px;
      border-bottom:1px solid rgba(255,255,255,.08);
    }
    .nav-panel-top strong{
      display:block;
      font-size:13px;
      letter-spacing:.16em;
      color:var(--muted);
      text-transform:uppercase;
    }
    .nav-panel-top p{
      margin:8px 0 0;
      font-size:12px;
      color:var(--muted);
      line-height:1.65;
    }
    .desktop-nav .nav-link{
      margin-bottom:8px;
    }
    .desktop-nav .nav-link:last-child{
      margin-bottom:0;
    }
    .nav-panel-foot{
      margin-top:auto;
      padding-top:16px;
      border-top:1px solid rgba(255,255,255,.08);
      display:grid;
      gap:10px;
      color:var(--muted);
      font-size:12px;
    }
    .nav-panel-foot .chip{
      width:max-content;
    }

    .page-content{
      margin-left:calc(var(--sidebar) + 44px);
      padding:calc(var(--topbar) + 34px) 32px 44px 0;
    }
    .content-wrap{
      width:100%;
      max-width:var(--container);
      padding-right:32px;
    }

    .section{
      margin-top:72px;
    }
    .section:first-of-type{
      margin-top:0;
    }
    .section-head{
      margin-bottom:24px;
      display:flex;
      flex-direction:column;
      gap:10px;
      max-width:840px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      width:max-content;
      padding:7px 12px;
      border-radius:var(--radius-pill);
      background:rgba(30,94,255,.12);
      border:1px solid rgba(30,94,255,.18);
      color:#D8E5FF;
      font-size:12px;
      letter-spacing:.12em;
      text-transform:uppercase;
    }
    .eyebrow .dot{
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 16px rgba(53,208,255,.8);
    }
    h1,h2,h3,p{
      margin:0;
    }
    .hero{
      padding-top:10px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);
      gap:24px;
      align-items:stretch;
    }
    .hero-copy,
    .hero-panel,
    .overview-strip,
    .guide-shell,
    .matrix-wrap,
    .faq-wrap,
    .cta-panel,
    .tip-panel{
      position:relative;
      border-radius:var(--radius-xl);
      background:linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.05));
      border:1px solid rgba(255,255,255,.09);
      box-shadow:var(--shadow);
      overflow:hidden;
      backdrop-filter:blur(18px) saturate(145%);
      -webkit-backdrop-filter:blur(18px) saturate(145%);
    }
    .hero-copy{
      padding:34px;
      min-height:100%;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .hero-copy::after,
    .hero-panel::after,
    .overview-strip::after,
    .guide-shell::after,
    .matrix-wrap::after,
    .faq-wrap::after,
    .cta-panel::after,
    .tip-panel::after{
      content:"";
      position:absolute;
      inset:0;
      pointer-events:none;
      background:
        linear-gradient(135deg, rgba(53,208,255,.10), transparent 26%),
        linear-gradient(315deg, rgba(178,58,111,.10), transparent 22%);
      opacity:.7;
    }
    .hero-topline{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:10px 12px;
      margin-bottom:16px;
      position:relative;
      z-index:1;
    }
    .chip{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:7px 12px;
      border-radius:var(--radius-pill);
      border:1px solid rgba(255,255,255,.10);
      background:rgba(255,255,255,.06);
      color:var(--soft);
      font-size:12px;
      line-height:1;
      white-space:nowrap;
    }
    .chip-warning{
      background:rgba(255,184,107,.10);
      border-color:rgba(255,184,107,.28);
      color:#FFD29D;
    }
    .chip-primary{
      background:rgba(30,94,255,.12);
      border-color:rgba(30,94,255,.22);
      color:#DCE7FF;
    }
    .chip-rose{
      background:rgba(178,58,111,.12);
      border-color:rgba(178,58,111,.22);
      color:#F2C6D6;
    }
    .chip-ghost{
      background:rgba(255,255,255,.04);
      color:var(--muted);
    }
    .hero h1{
      font-size:clamp(32px, 4.4vw, 56px);
      line-height:1.12;
      letter-spacing:-.03em;
      font-weight:800;
      margin-bottom:16px;
      position:relative;
      z-index:1;
    }
    .hero p{
      color:var(--soft);
      font-size:16px;
      line-height:1.85;
      max-width:720px;
      position:relative;
      z-index:1;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:22px;
      position:relative;
      z-index:1;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:48px;
      padding:0 18px;
      border-radius:var(--radius-pill);
      font-size:14px;
      font-weight:700;
      letter-spacing:.02em;
      transition:transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
      will-change:transform;
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg, var(--primary), var(--rose));
      box-shadow:0 16px 30px rgba(30,94,255,.22), 0 10px 24px rgba(178,58,111,.12);
      border:1px solid rgba(255,255,255,.08);
    }
    .btn-primary:hover{
      transform:translateY(-2px);
      box-shadow:0 20px 36px rgba(30,94,255,.26), 0 16px 28px rgba(178,58,111,.15);
    }
    .btn-secondary{
      color:var(--text);
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.12);
    }
    .btn-secondary:hover{
      transform:translateY(-2px);
      border-color:rgba(53,208,255,.22);
      background:rgba(255,255,255,.08);
    }
    .hero-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
      position:relative;
      z-index:1;
    }
    .hero-meta .chip{
      font-size:12px;
      color:var(--muted);
    }
    .hero-side{
      display:grid;
      gap:16px;
      min-height:100%;
    }
    .hero-panel{
      padding:22px;
      display:grid;
      gap:16px;
      align-content:start;
    }
    .panel-title{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      position:relative;
      z-index:1;
    }
    .panel-title strong{
      font-size:16px;
      letter-spacing:.01em;
    }
    .panel-title span{
      font-size:12px;
      color:var(--muted);
    }
    .stats-grid{
      display:grid;
      grid-template-columns:repeat(2, minmax(0,1fr));
      gap:12px;
      position:relative;
      z-index:1;
    }
    .stat-card{
      padding:16px;
      border-radius:20px;
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      display:grid;
      gap:6px;
      min-height:96px;
    }
    .stat-card em{
      font-style:normal;
      color:var(--muted);
      font-size:12px;
      letter-spacing:.08em;
    }
    .stat-card strong{
      font-size:28px;
      line-height:1.1;
      letter-spacing:-.03em;
    }
    .stat-card small{
      color:var(--soft);
      font-size:12px;
      line-height:1.55;
    }
    .panel-note{
      padding:16px 18px;
      border-radius:20px;
      background:linear-gradient(135deg, rgba(30,94,255,.10), rgba(178,58,111,.08));
      border:1px solid rgba(255,255,255,.08);
      color:var(--soft);
      font-size:13px;
      line-height:1.75;
      position:relative;
      z-index:1;
    }
    .panel-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      position:relative;
      z-index:1;
    }
    .mini-chip{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:8px 12px;
      border-radius:var(--radius-pill);
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      color:var(--soft);
      font-size:12px;
      line-height:1;
    }

    .overview-strip{
      padding:24px;
    }
    .section-title{
      font-size:clamp(24px, 2.7vw, 36px);
      line-height:1.18;
      font-weight:800;
      letter-spacing:-.03em;
      position:relative;
      z-index:1;
    }
    .section-desc{
      margin-top:10px;
      color:var(--muted);
      max-width:820px;
      font-size:15px;
      line-height:1.8;
      position:relative;
      z-index:1;
    }
    .category-grid{
      margin-top:20px;
      display:grid;
      grid-template-columns:repeat(3, minmax(0,1fr));
      gap:18px;
      position:relative;
      z-index:1;
    }
    .category-card{
      padding:22px;
      border-radius:24px;
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      box-shadow:0 14px 32px rgba(0,0,0,.24);
      display:flex;
      flex-direction:column;
      gap:14px;
      min-height:100%;
      transition:transform var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
    }
    .category-card:hover{
      transform:translateY(-4px);
      border-color:rgba(53,208,255,.20);
      background:rgba(255,255,255,.07);
      box-shadow:0 18px 40px rgba(0,0,0,.28);
    }
    .card-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
    }
    .card-index{
      width:42px;
      height:42px;
      border-radius:14px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, rgba(30,94,255,.18), rgba(178,58,111,.14));
      border:1px solid rgba(255,255,255,.08);
      color:#fff;
      font-weight:800;
      letter-spacing:.06em;
    }
    .card-icon{
      width:46px;
      height:46px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:rgba(255,255,255,.05);
      color:#DDE8FF;
      border:1px solid rgba(255,255,255,.08);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
    }
    .card-icon svg{
      width:20px;
      height:20px;
      fill:none;
      stroke:currentColor;
      stroke-width:1.8;
      stroke-linecap:round;
      stroke-linejoin:round;
    }
    .category-card h3{
      font-size:20px;
      line-height:1.24;
      letter-spacing:-.02em;
      font-weight:800;
    }
    .category-card p{
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
      min-height:58px;
    }
    .tag-row{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:6px 10px;
      border-radius:var(--radius-pill);
      background:rgba(255,255,255,.045);
      border:1px solid rgba(255,255,255,.08);
      color:#C9D4E6;
      font-size:12px;
      line-height:1;
    }
    .category-card .btn{
      width:100%;
      margin-top:auto;
    }

    .guide-shell{
      padding:24px;
    }
    .guide-grid{
      display:grid;
      grid-template-columns:280px minmax(0,1fr);
      gap:18px;
      position:relative;
      z-index:1;
    }
    .toc-card{
      position:sticky;
      top:102px;
      align-self:start;
      padding:18px;
      border-radius:24px;
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
    }
    .toc-card h3{
      font-size:18px;
      margin-bottom:10px;
      font-weight:800;
    }
    .toc-card p{
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
      margin-bottom:14px;
    }
    .toc-list{
      display:grid;
      gap:10px;
    }
    .toc-list a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      min-height:48px;
      padding:12px 14px;
      border-radius:16px;
      background:rgba(255,255,255,.04);
      border:1px solid rgba(255,255,255,.07);
      color:var(--soft);
      font-size:13px;
    }
    .toc-list a:hover{
      border-color:rgba(53,208,255,.20);
      background:rgba(255,255,255,.07);
      color:#fff;
      transform:translateX(2px);
    }
    .guide-main{
      display:grid;
      gap:18px;
    }
    .guide-card,
    .note-card,
    .step-card,
    .device-card,
    .faq-card,
    .cta-inner{
      position:relative;
      z-index:1;
      border-radius:24px;
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      overflow:hidden;
    }
    .guide-card{
      padding:22px;
    }
    .guide-card h3,
    .note-card h3,
    .device-card h3,
    .cta-inner h3{
      font-size:20px;
      line-height:1.25;
      font-weight:800;
      margin-bottom:10px;
    }
    .guide-card p,
    .note-card p,
    .device-card p,
    .cta-inner p{
      color:var(--soft);
      font-size:14px;
      line-height:1.85;
    }
    .guide-grid-2{
      display:grid;
      grid-template-columns:repeat(2, minmax(0,1fr));
      gap:18px;
    }
    .note-card{
      padding:20px;
    }
    .note-card .tag-row{
      margin-bottom:12px;
    }
    .bullet-list{
      list-style:none;
      padding:0;
      margin:14px 0 0;
      display:grid;
      gap:10px;
    }
    .bullet-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:var(--soft);
      font-size:14px;
      line-height:1.75;
    }
    .bullet-list li::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      margin-top:10px;
      background:linear-gradient(135deg, var(--accent), var(--primary));
      box-shadow:0 0 12px rgba(53,208,255,.75);
      flex:0 0 auto;
    }
    .step-list{
      display:grid;
      gap:14px;
      margin-top:16px;
    }
    .step-item{
      display:grid;
      grid-template-columns:56px minmax(0,1fr);
      gap:14px;
      align-items:start;
      padding:16px 0;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .step-item:first-child{
      padding-top:0;
      border-top:0;
    }
    .step-num{
      width:48px;
      height:48px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, rgba(30,94,255,.18), rgba(53,208,255,.10));
      border:1px solid rgba(255,255,255,.08);
      color:#fff;
      font-weight:800;
      letter-spacing:.06em;
    }
    .step-item h4{
      margin:0 0 6px;
      font-size:16px;
      line-height:1.3;
      font-weight:800;
    }
    .step-item p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.8;
    }

    .matrix-wrap{
      padding:24px;
    }
    .matrix-grid{
      display:grid;
      grid-template-columns:repeat(3, minmax(0,1fr));
      gap:18px;
      position:relative;
      z-index:1;
    }
    .device-card{
      padding:20px;
      min-height:100%;
    }
    .device-badge{
      width:max-content;
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:var(--radius-pill);
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      color:#D6E2F7;
      font-size:12px;
      margin-bottom:14px;
    }
    .device-card ul{
      list-style:none;
      margin:14px 0 0;
      padding:0;
      display:grid;
      gap:10px;
    }
    .device-card li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:var(--soft);
      font-size:14px;
      line-height:1.75;
    }
    .device-card li::before{
      content:"";
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--warning);
      box-shadow:0 0 10px rgba(255,184,107,.55);
      margin-top:10px;
      flex:0 0 auto;
    }

    .faq-wrap{
      padding:24px;
    }
    .faq-list{
      display:grid;
      gap:12px;
      position:relative;
      z-index:1;
    }
    .faq-item{
      border-radius:22px;
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      overflow:hidden;
    }
    .faq-question{
      width:100%;
      text-align:left;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:18px 18px;
      min-height:60px;
      background:transparent;
      color:var(--text);
      font-size:15px;
      font-weight:700;
    }
    .faq-question span{
      display:block;
    }
    .faq-question .arrow{
      width:16px;
      height:16px;
      flex:0 0 auto;
      border-right:2px solid currentColor;
      border-bottom:2px solid currentColor;
      transform:rotate(45deg);
      transition:transform var(--transition);
      opacity:.8;
    }
    .faq-item.is-open .faq-question .arrow{
      transform:rotate(-135deg);
    }
    .faq-answer{
      max-height:0;
      overflow:hidden;
      transition:max-height var(--transition);
    }
    .faq-answer-inner{
      padding:0 18px 18px;
      color:var(--soft);
      font-size:14px;
      line-height:1.85;
    }

    .cta-panel{
      padding:24px;
    }
    .cta-inner{
      padding:24px;
      display:grid;
      gap:14px;
      background:linear-gradient(135deg, rgba(30,94,255,.12), rgba(178,58,111,.10));
    }
    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:6px;
    }
    .cta-note{
      color:var(--muted);
      font-size:13px;
      line-height:1.8;
    }

    .footer{
      position:relative;
      z-index:1;
      margin-top:86px;
      padding:0 32px 38px calc(var(--sidebar) + 44px);
    }
    .footer-wrap{
      max-width:var(--container);
      padding:22px 0 0;
      border-top:1px solid rgba(255,255,255,.08);
      display:grid;
      grid-template-columns:minmax(0,1.3fr) minmax(220px,.8fr) minmax(220px,.8fr);
      gap:20px;
    }
    .footer-brand strong{
      display:block;
      font-size:18px;
      font-weight:800;
      margin-bottom:12px;
    }
    .footer-brand p{
      color:var(--muted);
      font-size:13px;
      line-height:1.8;
      margin:0 0 10px;
    }
    .footer-links{
      display:grid;
      gap:10px;
      align-content:start;
    }
    .footer-links a{
      display:flex;
      align-items:center;
      min-height:42px;
      padding:10px 12px;
      border-radius:14px;
      border:1px solid rgba(255,255,255,.08);
      background:rgba(255,255,255,.04);
      color:var(--soft);
      font-size:13px;
    }
    .footer-links a:hover{
      border-color:rgba(53,208,255,.20);
      background:rgba(255,255,255,.07);
      transform:translateY(-1px);
    }
    .footer-meta{
      display:grid;
      gap:10px;
      align-content:start;
    }
    .footer-meta span{
      display:flex;
      align-items:flex-start;
      gap:8px;
      padding:10px 12px;
      border-radius:14px;
      background:rgba(255,255,255,.04);
      border:1px solid rgba(255,255,255,.08);
      color:var(--muted);
      font-size:13px;
      line-height:1.7;
    }
    .footer-meta .domain,
    .footer-brand .domain{
      color:#DDE8FF;
      text-decoration:underline;
      text-underline-offset:2px;
    }
    .footer-meta .domain:hover,
    .footer-brand .domain:hover{
      color:#fff;
    }

    .desktop-only{display:block}
    .mobile-only{display:none}

    @media (max-width: 1180px){
      :root{--sidebar:220px}
      .page-content{
        margin-left:calc(var(--sidebar) + 36px);
      }
      .footer{
        padding-left:calc(var(--sidebar) + 36px);
      }
      .hero-grid,
      .guide-grid{
        grid-template-columns:1fr;
      }
      .toc-card{
        position:relative;
        top:auto;
      }
      .category-grid,
      .matrix-grid{
        grid-template-columns:repeat(2, minmax(0,1fr));
      }
      .footer-wrap{
        grid-template-columns:1fr 1fr;
      }
      .footer-meta{
        grid-column:1 / -1;
        grid-template-columns:repeat(3, minmax(0,1fr));
      }
    }
    @media (max-width: 992px){
      .desktop-nav{display:none}
      .page-content{
        margin-left:0;
        padding:calc(var(--topbar) + 24px) 18px 32px;
      }
      .content-wrap{
        padding-right:0;
      }
      .footer{
        padding:0 18px 30px;
      }
      .footer-wrap{
        grid-template-columns:1fr;
      }
      .footer-meta{
        grid-template-columns:1fr;
      }
      .desktop-only{display:none}
      .mobile-only{display:block}
      .hero-copy,
      .hero-panel,
      .overview-strip,
      .guide-shell,
      .matrix-wrap,
      .faq-wrap,
      .cta-panel,
      .tip-panel,
      .category-card,
      .guide-card,
      .note-card,
      .device-card,
      .faq-item,
      .cta-inner{
        border-radius:22px;
      }
    }
    @media (max-width: 767px){
      :root{--topbar:64px}
      .topbar{
        padding:0 14px;
        height:var(--topbar);
      }
      .brand-mark{
        width:42px;
        height:42px;
        border-radius:14px;
      }
      .brand-text strong{
        font-size:14px;
      }
      .brand-text span{
        font-size:11px;
      }
      .menu-btn{
        width:44px;
        height:44px;
        border-radius:14px;
      }
      .page-content{
        padding-top:calc(var(--topbar) + 18px);
      }
      .hero-copy{
        padding:24px;
      }
      .hero h1{
        font-size:clamp(30px, 8vw, 40px);
      }
      .hero p,
      .section-desc{
        font-size:14px;
        line-height:1.8;
      }
      .section{
        margin-top:54px;
      }
      .overview-strip,
      .guide-shell,
      .matrix-wrap,
      .faq-wrap,
      .cta-panel{
        padding:18px;
      }
      .category-grid,
      .matrix-grid,
      .guide-grid-2{
        grid-template-columns:1fr;
      }
      .category-card h3{
        font-size:18px;
      }
      .stats-grid{
        grid-template-columns:1fr;
      }
      .step-item{
        grid-template-columns:48px minmax(0,1fr);
        gap:12px;
      }
      .cta-actions,
      .hero-actions{
        flex-direction:column;
      }
      .btn{
        width:100%;
      }
      .toc-list{
        display:flex;
        gap:10px;
        overflow-x:auto;
        padding-bottom:4px;
      }
      .toc-list a{
        min-width:max-content;
      }
      .footer{
        margin-top:64px;
      }
      .footer-brand strong{
        font-size:16px;
      }
    }
    @media (max-width: 520px){
      .hero-copy,
      .hero-panel,
      .overview-strip,
      .guide-shell,
      .matrix-wrap,
      .faq-wrap,
      .cta-panel{
        padding:16px;
      }
      .hero-topline{
        gap:8px;
      }
      .chip{
        padding:6px 10px;
      }
      .faq-question{
        padding:16px;
        font-size:14px;
      }
      .faq-answer-inner{
        padding:0 16px 16px;
      }
      .footer-links a,
      .footer-meta span{
        min-height:40px;
      }
    }
    body.drawer-lock{
      overflow:hidden;
    }