/* roulang page: index */
:root {
      --bg: #07131f;
      --bg-2: #0b1a2b;
      --bg-3: #10243a;
      --panel: rgba(12, 32, 52, 0.62);
      --panel-strong: rgba(10, 28, 46, 0.86);
      --panel-soft: rgba(16, 40, 62, 0.42);
      --line: rgba(155, 230, 224, 0.22);
      --line-strong: rgba(46, 230, 214, 0.48);
      --text: #eef7f8;
      --muted: #9cb3c4;
      --cyan: #2ee6d6;
      --ice: #9af7ee;
      --signal: #3dffb0;
      --danger: #ff6b81;
      --radius: 12px;
      --radius-sm: 8px;
      --shadow: 0 0 0 1px rgba(46, 230, 214, 0.12), 0 10px 40px rgba(8, 24, 40, 0.45);
      --glow: 0 0 24px rgba(46, 230, 214, 0.28);
      --space: 88px;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: "Noto Sans SC", "Source Han Sans SC", sans-serif;
      background:
        radial-gradient(1000px 480px at 12% -8%, rgba(46, 230, 214, .10), transparent 55%),
        radial-gradient(820px 420px at 92% 6%, rgba(24, 110, 160, .16), transparent 52%),
        var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }
    img { max-width: 100%; display: block; }
    a { color: var(--ice); text-decoration: none; transition: color .25s ease, opacity .25s ease; }
    a:hover { color: var(--cyan); }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; }
    .container { width: min(1240px, calc(100% - 32px)); margin: 0 auto; }
    .mono, .kpi-num, .stat-num { font-family: "JetBrains Mono", ui-monospace, monospace; font-variant-numeric: tabular-nums; }
    .site-header { position: relative; z-index: 80; }
    .topbar {
      background: rgba(6, 16, 28, 0.94);
      border-bottom: 1px solid rgba(46, 230, 214, 0.12);
    }
    .topbar-inner, .menubar-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
    .topbar-inner { min-height: 64px; }
    .brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; letter-spacing: .02em; }
    .brand-mark {
      width: 36px; height: 36px; border-radius: 9px;
      background: linear-gradient(135deg, #163a52, #0d273c);
      border: 1px solid var(--line-strong);
      box-shadow: var(--glow);
      display: grid; place-items: center; color: var(--cyan); font-size: 14px;
    }
    .brand-text { font-size: 18px; line-height: 1.2; }
    .top-meta { display: flex; align-items: center; gap: 18px; color: var(--muted); font-size: 13px; }
    .trust-chip {
      display: inline-flex; align-items: center; gap: 6px;
      border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px;
      color: var(--ice); background: rgba(46,230,214,.06); font-size: 12px;
    }
    .menubar {
      position: sticky; top: 0; z-index: 70;
      background: rgba(9, 22, 36, 0.72);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(155, 230, 224, 0.12);
    }
    .menubar-inner { min-height: 52px; }
    .nav-links { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
    .nav-links a {
      color: var(--muted); font-size: 14px; padding: 8px 12px; border-radius: 8px;
      min-height: 44px; display: inline-flex; align-items: center;
    }
    .nav-links a:hover, .nav-links a.is-active {
      color: var(--text); background: rgba(46, 230, 214, 0.1); box-shadow: inset 0 0 0 1px rgba(46,230,214,.22);
    }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 10px 18px; border-radius: 10px; font-weight: 600; border: 1px solid transparent;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
    }
    .btn-glow {
      background: linear-gradient(180deg, #39f0df, #1ac7bc);
      color: #042028; box-shadow: 0 0 0 1px rgba(155,247,238,.25), 0 0 22px rgba(46,230,214,.35);
    }
    .btn-glow:hover { transform: translateY(-1px); box-shadow: 0 0 0 1px rgba(155,247,238,.4), 0 0 34px rgba(46,230,214,.55); }
    .btn-glow:active { transform: translateY(1px) scale(.98); }
    .btn-ghost {
      background: rgba(16,40,62,.45); color: var(--text); border-color: var(--line);
      backdrop-filter: blur(12px);
    }
    .btn-ghost:hover { border-color: var(--cyan); box-shadow: var(--glow); color: var(--ice); }
    .btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible, .dot:focus-visible, .icon-btn:focus-visible {
      outline: 2px solid var(--cyan); outline-offset: 3px; box-shadow: 0 0 0 6px rgba(46,230,214,.18);
    }
    .icon-btn {
      width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--line);
      background: rgba(16,40,62,.5); color: var(--text); display: none; place-items: center;
    }
    .drawer {
      display: none; position: absolute; left: 0; right: 0; top: 100%;
      background: rgba(8,20,34,.96); border-bottom: 1px solid var(--line); padding: 12px 16px 20px;
    }
    .drawer.open { display: block; }
    .drawer a { display: flex; align-items: center; min-height: 44px; color: var(--text); padding: 8px 10px; border-radius: 8px; }
    .drawer a:hover { background: rgba(46,230,214,.1); }
    main { display: block; }
    .section { padding: var(--space) 0; position: relative; }
    .section-head { margin-bottom: 28px; max-width: 760px; }
    .section-head h2 { font-size: 30px; line-height: 1.25; margin: 0 0 12px; letter-spacing: .01em; }
    .section-head p { margin: 0; color: var(--muted); font-size: 15px; }
    .kicker { display: inline-flex; align-items: center; gap: 8px; color: var(--cyan); font-size: 12px; letter-spacing: .16em; margin-bottom: 10px; }
    .glass {
      background: var(--panel); backdrop-filter: blur(16px);
      border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
      position: relative; overflow: hidden;
    }
    .glass::before {
      content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px;
      background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    }
    .glass-strong { background: var(--panel-strong); }
    .badge {
      display: inline-flex; align-items: center; min-height: 26px; padding: 0 8px; border-radius: 6px;
      font-size: 12px; color: var(--ice); background: rgba(46,230,214,.1); border: 1px solid rgba(46,230,214,.2);
    }
    .grid-bg {
      background-image:
        linear-gradient(rgba(155,230,224,.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(155,230,224,.045) 1px, transparent 1px);
      background-size: 28px 28px;
    }
    #hero { padding: 28px 0 48px; }
    .hero-stage {
      display: grid; grid-template-columns: 1fr 1.15fr 1fr; gap: 18px; align-items: stretch;
    }
    .hero-side { display: flex; flex-direction: column; gap: 14px; justify-content: center; }
    .value-card { padding: 18px; }
    .value-card h3 { margin: 0 0 8px; font-size: 16px; }
    .value-card p { margin: 0; color: var(--muted); font-size: 14px; }
    .stage-frame {
      border-radius: 16px; overflow: hidden; position: relative; min-height: 560px;
      border: 1px solid var(--line-strong); box-shadow: 0 0 50px rgba(46,230,214,.16);
    }
    .slides { position: relative; height: 100%; min-height: 560px; }
    .slide { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .35s ease; }
    .slide.is-on { opacity: 1; pointer-events: auto; }
    .slide-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
    .slide-bg::after {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(180deg, rgba(5,14,24,.28), rgba(5,14,24,.78));
    }
    .slide-shot {
      position: absolute; left: 50%; top: 42%; transform: translate(-50%, -50%);
      width: min(88%, 430px); border-radius: 12px; border: 1px solid rgba(155,247,238,.3);
      box-shadow: 0 20px 50px rgba(0,0,0,.35);
    }
    .hero-copy {
      position: absolute; left: 18px; right: 18px; bottom: 18px;
      padding: 18px; border-radius: 12px;
      background: rgba(7,19,31,.62); backdrop-filter: blur(16px); border: 1px solid var(--line);
    }
    .brand-line { color: var(--cyan); font-size: 13px; font-weight: 600; margin-bottom: 6px; }
    .hero-copy h1, .hero-copy .hero-title { font-size: 28px; line-height: 1.25; margin: 0 0 10px; font-weight: 700; }
    .hero-copy p { margin: 0 0 14px; color: #d5e6ee; font-size: 14px; }
    .cta-row { display: flex; flex-wrap: wrap; gap: 10px; }
    .hero-ctrl { display: flex; align-items: center; justify-content: space-between; margin-top: 14px; }
    .dots { display: flex; gap: 8px; }
    .dot { width: 12px; height: 12px; border-radius: 50%; border: 0; background: rgba(155,230,224,.28); }
    .dot.is-on { background: var(--cyan); box-shadow: var(--glow); }
    .kpi-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
    .kpi-tile { padding: 18px 16px; }
    .kpi-num { font-size: 28px; color: var(--cyan); line-height: 1.1; }
    .kpi-unit { font-size: 12px; color: var(--ice); margin-left: 4px; }
    .kpi-label { color: var(--muted); font-size: 13px; margin-top: 8px; }
    .trend { height: 6px; border-radius: 99px; background: rgba(255,255,255,.08); overflow: hidden; margin-top: 12px; }
    .trend > span { display: block; height: 100%; background: linear-gradient(90deg, var(--cyan), var(--signal)); box-shadow: 0 0 10px rgba(61,255,176,.5); }
    .filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
    .filter-bar span { padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line); color: var(--muted); font-size: 13px; background: rgba(16,40,62,.4); }
    .split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 28px; align-items: center; }
    .cover { border-radius: 14px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--glow); }
    .cover img { width: 100%; height: 100%; object-fit: cover; min-height: 340px; }
    .matrix { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .cap-card { padding: 20px; min-height: 210px; }
    .cap-card h3 { margin: 10px 0 8px; font-size: 18px; }
    .cap-card p { margin: 0; color: var(--muted); font-size: 14px; }
    .mini-metric { margin-top: 14px; color: var(--cyan); font-size: 13px; }
    .bento { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; }
    .mod-cover { height: 160px; overflow: hidden; }
    .mod-cover img { width: 100%; height: 100%; object-fit: cover; }
    .mod-body { padding: 18px; }
    .mod-body h3 { margin: 0 0 8px; font-size: 20px; }
    .mod-body p { margin: 0; color: var(--muted); font-size: 14px; }
    table.compare { width: 100%; border-collapse: collapse; }
    table.compare th, table.compare td { padding: 14px 16px; text-align: left; border-bottom: 1px solid rgba(155,230,224,.12); font-size: 14px; }
    table.compare th { color: var(--ice); font-weight: 600; background: rgba(46,230,214,.06); }
    .lose { color: #c9d6de; }
    .win { color: var(--cyan); }
    .dark-band { padding: 84px 0; background-size: cover; background-position: center; position: relative; }
    .dark-band::before {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(90deg, rgba(5,14,24,.88), rgba(7,20,34,.72) 50%, rgba(5,14,24,.9));
    }
    .dark-band .container { position: relative; z-index: 1; }
    .case-grid { display: grid; grid-template-columns: 1.5fr .75fr .75fr; gap: 16px; }
    .timeline { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; position: relative; }
    .timeline::before {
      content: ""; position: absolute; left: 4%; right: 4%; top: 22px; height: 2px;
      background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    }
    .node { padding: 18px 16px; }
    .node-week { color: var(--cyan); font-size: 12px; letter-spacing: .08em; }
    .node h3 { margin: 8px 0; font-size: 16px; }
    .node p { margin: 0; color: var(--muted); font-size: 14px; }
    .stories { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .story { padding: 20px; }
    .story h3 { margin: 0 0 10px; font-size: 18px; }
    .story p { margin: 0; color: var(--muted); font-size: 14px; }
    .stats-bar {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
      border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
      background: rgba(10,28,46,.72);
    }
    .stat-item { padding: 22px 18px; border-right: 1px solid rgba(155,230,224,.12); }
    .stat-item:last-child { border-right: 0; }
    .stat-num { font-size: 30px; color: var(--cyan); }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .review { padding: 20px; }
    .review p { margin: 0 0 14px; color: #d7e7ee; font-size: 14px; }
    .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .news-card img { height: 140px; width: 100%; object-fit: cover; }
    .news-card .body { padding: 16px; }
    .news-card h3 { margin: 0 0 8px; font-size: 16px; }
    .news-card p { margin: 0; color: var(--muted); font-size: 13px; }
    .date { color: var(--cyan); font-size: 12px; margin-bottom: 6px; }
    .share-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
    .share-row a, .share-row span {
      min-height: 44px; display: inline-flex; align-items: center; padding: 0 14px; border-radius: 8px;
      border: 1px solid var(--line); color: var(--text); background: rgba(16,40,62,.4);
    }
    .topic-index { display: flex; flex-wrap: wrap; gap: 10px; }
    .topic-index a {
      min-height: 44px; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--line);
      color: var(--text); background: rgba(16,40,62,.35);
    }
    .trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .trust-card { padding: 20px; }
    .trust-card h3 { margin: 0 0 8px; font-size: 18px; }
    .trust-card p { margin: 0; color: var(--muted); font-size: 14px; }
    .qa-list { display: grid; gap: 12px; }
    .qa-item { padding: 16px 18px; display: grid; grid-template-columns: 190px 1fr; gap: 16px; }
    .qa-item dt { color: var(--ice); font-weight: 600; }
    .qa-item dd { margin: 0; color: var(--muted); }
    .faq-item { margin-bottom: 10px; }
    .faq-item summary {
      list-style: none; cursor: pointer; min-height: 52px; display: flex; align-items: center; justify-content: space-between;
      padding: 12px 16px; font-weight: 600;
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item p { margin: 0; padding: 0 16px 16px; color: var(--muted); }
    .demo-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 20px; }
    form.crm-form { display: grid; gap: 12px; padding: 22px; }
    label { font-size: 13px; color: var(--ice); }
    input, select, textarea {
      width: 100%; min-height: 44px; border-radius: 8px; border: 1px solid var(--line);
      background: rgba(6,16,28,.7); color: var(--text); padding: 10px 12px;
    }
    textarea { min-height: 96px; resize: vertical; }
    .error { color: var(--danger); font-size: 12px; display: none; }
    .field.invalid input, .field.invalid select, .field.invalid textarea { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(255,107,129,.15); }
    .field.invalid .error { display: block; }
    .form-ok {
      display: none; padding: 22px; border: 1px solid var(--line-strong); border-radius: 12px;
      background: rgba(46,230,214,.08); color: var(--ice);
    }
    .form-ok.show { display: block; }
    .contact-side { padding: 22px; }
    .bottom-cta {
      margin-top: 22px; padding: 22px; display: flex; justify-content: space-between; align-items: center; gap: 16px;
    }
    .site-footer { padding: 48px 0 24px; border-top: 1px solid rgba(155,230,224,.12); background: #06101c; }
    .foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 24px; }
    .site-footer h3 { margin: 0 0 12px; font-size: 16px; }
    .site-footer a, .site-footer p { color: var(--muted); font-size: 14px; }
    .foot-copy { margin-top: 28px; padding-top: 16px; border-top: 1px solid rgba(155,230,224,.1); color: #7f93a3; font-size: 13px; }
    @media (max-width: 1280px) {
      .kpi-grid { grid-template-columns: repeat(3, 1fr); }
      .news-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 1024px) {
      .hero-stage, .split, .bento, .case-grid, .demo-grid, .foot-grid { grid-template-columns: 1fr; }
      .matrix, .stories, .reviews, .trust-grid { grid-template-columns: 1fr 1fr; }
      .timeline { grid-template-columns: 1fr; }
      .timeline::before { display: none; }
      .qa-item { grid-template-columns: 1fr; }
      .top-meta .hours, .trust-chip { display: none; }
      .nav-links { display: none; }
      .icon-btn { display: grid; }
      .hero-copy h1, .hero-copy .hero-title { font-size: 24px; }
    }
    @media (max-width: 768px) {
      :root { --space: 64px; }
      .kpi-grid, .matrix, .stories, .reviews, .trust-grid, .stats-bar, .news-grid { grid-template-columns: 1fr; }
      .stat-item { border-right: 0; border-bottom: 1px solid rgba(155,230,224,.12); }
      .bottom-cta, .topbar-inner { flex-direction: column; align-items: flex-start; }
      .section-head h2 { font-size: 24px; }
      .stage-frame, .slides { min-height: 640px; }
    }
    @media (max-width: 375px) {
      .container { width: calc(100% - 20px); }
      .brand-text { font-size: 15px; }
      .hero-copy { left: 10px; right: 10px; bottom: 10px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      * { transition: none !important; animation: none !important; }
    }