/* roulang page: index */
:root {
      --bg-0: #070B14;
      --bg-1: #0B1526;
      --bg-2: #10233F;
      --primary: #1A5FBF;
      --primary-2: #2474E0;
      --accent: #7EC8FF;
      --hairline: #C9A36A;
      --seal: #B4232C;
      --text: #F4F7FB;
      --text-soft: #C5D2E4;
      --text-mute: #8A9BB3;
      --glass: rgba(16, 35, 63, .55);
      --glass-2: rgba(16, 35, 63, .72);
      --line: rgba(126, 200, 255, .18);
      --line-strong: rgba(126, 200, 255, .42);
      --inset: rgba(255, 255, 255, .08);
      --radius: 6px;
      --radius-sm: 3px;
      --shadow: 0 18px 40px rgba(3, 8, 18, .45);
      --glow: 0 0 0 1px rgba(126, 200, 255, .35), 0 0 24px rgba(26, 95, 191, .45);
      --container: 1240px;
      --header-h: 108px;
      --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
      --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    html, body { margin: 0; padding: 0; }
    body {
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text);
      background: var(--bg-0);
      min-height: 100%;
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--accent); text-decoration: none; transition: color .2s ease, opacity .2s ease; }
    a:hover { color: #B9E3FF; }
    button, input, select, textarea { font-family: inherit; }
    button { cursor: pointer; }
    h1, h2, h3 { font-family: var(--font-serif); font-weight: 700; line-height: 1.28; margin: 0 0 14px; letter-spacing: .02em; }
    h1 { font-size: clamp(28px, 4vw, 46px); }
    h2 { font-size: clamp(24px, 2.4vw, 28px); }
    h3 { font-size: 19px; }
    p { margin: 0 0 10px; color: var(--text-soft); }
    ul { margin: 0; padding: 0; list-style: none; }
    :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
    .skip {
      position: absolute; left: -999px; top: 8px; background: var(--primary); color: #fff; padding: 8px 14px; z-index: 100;
    }
    .skip:focus { left: 8px; }
    .container { width: min(100% - 40px, var(--container)); margin: 0 auto; }
    .num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
    .badge {
      display: inline-flex; align-items: center; gap: 6px;
      border: 1px solid rgba(201, 163, 106, .45); color: var(--hairline);
      font-size: 12px; letter-spacing: .12em; padding: 4px 10px; border-radius: 2px; text-transform: none;
    }
    .badge-seal { border-color: rgba(180, 35, 44, .55); color: #F3B4B8; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 10px 20px; border-radius: var(--radius-sm);
      font-size: 15px; font-weight: 600; border: 1px solid transparent; transition: .2s ease;
      letter-spacing: .04em;
    }
    .btn-primary {
      background: linear-gradient(180deg, var(--primary-2), var(--primary));
      color: #fff; box-shadow: var(--glow);
    }
    .btn-primary:hover { filter: brightness(1.08); box-shadow: 0 0 0 1px rgba(126,200,255,.55), 0 0 32px rgba(26,95,191,.7); color: #fff; }
    .btn-primary:active { transform: translateY(1px); }
    .btn-ghost {
      background: rgba(16, 35, 63, .4); color: var(--accent);
      border: 1px solid var(--line); backdrop-filter: blur(12px);
    }
    .btn-ghost:hover { border-color: var(--line-strong); color: #fff; background: rgba(26, 95, 191, .28); }
    .btn[disabled] { opacity: .4; pointer-events: none; }
    .site-header { position: relative; z-index: 80; }
    .topbar {
      background: #050910; border-bottom: 1px solid rgba(201,163,106,.18);
      font-size: 13px; color: var(--text-mute);
    }
    .topbar-inner {
      min-height: 40px; display: grid; grid-template-columns: 1fr 1.2fr 1fr; align-items: center; gap: 12px;
    }
    .topbar a { color: var(--text-soft); }
    .topbar a:hover { color: var(--accent); }
    .topbar-center { text-align: center; }
    .topbar-right { text-align: right; }
    .mainnav {
      position: sticky; top: 0; z-index: 90;
      background: rgba(7, 11, 20, .72);
      backdrop-filter: blur(18px) saturate(1.2);
      border-bottom: 1px solid rgba(126,200,255,.08);
      transition: background .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .mainnav.is-stuck {
      background: rgba(7, 11, 20, .92);
      border-bottom-color: rgba(126,200,255,.28);
      box-shadow: 0 10px 30px rgba(0,0,0,.28), 0 0 0 1px rgba(126,200,255,.12);
    }
    .mainnav-inner {
      min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 20px;
    }
    .logo { display: flex; flex-direction: column; line-height: 1.15; color: var(--text); min-height: 44px; justify-content: center; }
    .logo-mark { font-family: var(--font-serif); font-size: 20px; color: #fff; }
    .logo-sub { font-size: 12px; color: var(--hairline); letter-spacing: .18em; }
    .logo:hover { color: #fff; }
    .nav-links { display: flex; align-items: center; gap: 4px; }
    .nav-links a {
      color: var(--text-soft); font-size: 14px; padding: 10px 12px; min-height: 44px;
      display: inline-flex; align-items: center; position: relative;
    }
    .nav-links a::after {
      content: ""; position: absolute; left: 12px; right: 12px; bottom: 6px; height: 1px;
      background: var(--accent); transform: scaleX(0); transform-origin: left; transition: .2s ease;
      box-shadow: 0 0 8px var(--accent);
    }
    .nav-links a:hover, .nav-links a.is-active { color: #fff; }
    .nav-links a.is-active::after, .nav-links a:hover::after { transform: scaleX(1); }
    .nav-cta { flex-shrink: 0; }
    .nav-toggle {
      display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: rgba(16,35,63,.5);
      border-radius: var(--radius-sm); color: #fff;
    }
    .nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
      display: block; width: 18px; height: 1.5px; background: #fff; position: relative; margin: 0 auto;
    }
    .nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; }
    .nav-toggle span::before { top: -6px; }
    .nav-toggle span::after { top: 6px; }
    .drawer {
      display: none; position: fixed; inset: 0; background: rgba(7,11,20,.86);
      backdrop-filter: blur(22px) saturate(1.2); z-index: 95; padding: 88px 24px 32px;
    }
    .drawer.is-open { display: flex; flex-direction: column; gap: 8px; }
    .drawer a {
      color: #fff; font-size: 20px; min-height: 48px; display: flex; align-items: center;
      border-bottom: 1px solid rgba(126,200,255,.12); font-family: var(--font-serif);
    }
    main { display: block; }
    section { position: relative; padding: 88px 0; }
    .sec-head { margin-bottom: 36px; max-width: 760px; }
    .sec-head p { margin-top: 8px; }
    .clause { color: var(--hairline); font-size: 12px; letter-spacing: .16em; margin-bottom: 8px; }
    .glass {
      background: var(--glass);
      backdrop-filter: blur(18px) saturate(1.2);
      border: 1px solid var(--line);
      box-shadow: inset 0 1px 0 var(--inset), var(--shadow);
      border-radius: var(--radius);
    }
    .hero { padding: 0; min-height: 86vh; }
    .hero-track { position: relative; min-height: 86vh; overflow: hidden; }
    .slide {
      position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .6s ease;
    }
    .slide.is-on { opacity: 1; pointer-events: auto; z-index: 1; }
    .slide img.bg {
      position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: saturate(.85) contrast(1.05);
    }
    .slide::after {
      content: ""; position: absolute; inset: 0;
      background:
        radial-gradient(900px 420px at 18% 20%, rgba(26,95,191,.28), transparent 60%),
        linear-gradient(90deg, rgba(7,11,20,.86) 8%, rgba(7,11,20,.55) 52%, rgba(7,11,20,.72) 100%),
        repeating-linear-gradient(180deg, transparent 0 31px, rgba(126,200,255,.035) 31px 32px);
    }
    .slide-copy {
      position: relative; z-index: 2; min-height: 86vh; display: flex; align-items: center; padding: 48px 0 88px;
    }
    .hero-kicker { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; color: var(--hairline); font-size: 13px; letter-spacing: .2em; }
    .hero-kicker b { font-family: var(--font-serif); font-weight: 700; color: #fff; letter-spacing: .12em; }
    .slide-copy h1, .slide-copy .slide-title { max-width: 760px; }
    .slide-title { font-family: var(--font-serif); font-size: clamp(28px, 4vw, 44px); margin: 0 0 16px; }
    .hero-lead { max-width: 680px; font-size: 16px; margin-bottom: 28px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-ctrl {
      position: absolute; z-index: 3; bottom: 28px; left: 0; right: 0;
      display: flex; align-items: center; justify-content: space-between;
      width: min(100% - 40px, var(--container)); margin: 0 auto;
    }
    .dots { display: flex; gap: 8px; }
    .dots button {
      width: 36px; height: 3px; padding: 0; border: 0; background: rgba(255,255,255,.28); min-height: 12px;
      background-clip: content-box; padding: 6px 0; box-shadow: inset 0 -3px 0 rgba(255,255,255,.28);
    }
    .dots button.is-on { box-shadow: inset 0 -3px 0 var(--accent); }
    .arrows { display: flex; gap: 8px; }
    .arrows button {
      width: 44px; height: 44px; border-radius: var(--radius-sm); border: 1px solid var(--line);
      background: rgba(7,11,20,.45); color: #fff;
    }
    .arrows button:hover { border-color: var(--accent); }
    .metrics {
      background:
        radial-gradient(700px 280px at 80% 0%, rgba(26,95,191,.22), transparent 70%),
        var(--bg-1);
      padding-top: 72px;
    }
    .meter-grid {
      display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
    }
    .meter {
      padding: 22px 20px; min-height: 148px; transition: .22s ease;
    }
    .meter:hover { transform: translateY(-5px); border-color: var(--line-strong); box-shadow: 0 0 24px rgba(26,95,191,.28), inset 0 1px 0 var(--inset); }
    .meter .n { font-size: 34px; font-weight: 700; color: #fff; line-height: 1.1; }
    .meter .u { color: var(--accent); font-size: 14px; margin-left: 4px; }
    .meter .t { margin-top: 10px; color: var(--text-mute); font-size: 13px; }
    .intro { background: var(--bg-0); }
    .intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
    .intro-pic { position: relative; overflow: hidden; border-radius: var(--radius); border: 1px solid var(--line); min-height: 420px; }
    .intro-pic img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }
    .stamp {
      position: absolute; right: 16px; top: 16px; width: 78px; height: 78px; border: 1px solid var(--hairline);
      color: var(--hairline); border-radius: 50%; display: flex; align-items: center; justify-content: center;
      font-size: 11px; letter-spacing: .08em; transform: rotate(-12deg); background: rgba(7,11,20,.35);
    }
    .law-list { margin-top: 16px; display: grid; gap: 8px; }
    .law-list li {
      padding: 10px 12px 10px 14px; border-left: 2px solid var(--hairline); background: rgba(16,35,63,.4); font-size: 14px; color: var(--text-soft);
    }
    .matrix { background: var(--bg-1); }
    .matrix-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .mcard {
      padding: 22px 20px 18px; min-height: 250px; display: flex; flex-direction: column; transition: .22s ease;
    }
    .mcard:hover { transform: translateY(-5px); border-color: var(--line-strong); }
    .mcard .no { color: var(--hairline); font-size: 12px; letter-spacing: .2em; }
    .mcard h3 { margin: 10px 0 12px; }
    .mcard li { position: relative; padding-left: 14px; color: var(--text-soft); font-size: 14px; margin-bottom: 6px; }
    .mcard li::before { content: ""; position: absolute; left: 0; top: 10px; width: 5px; height: 1px; background: var(--accent); }
    .mcard .go { margin-top: auto; padding-top: 12px; color: var(--accent); font-size: 14px; }
    .specials { background: var(--bg-0); }
    .spec-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .spec {
      overflow: hidden; min-height: 360px; position: relative; display: flex; flex-direction: column; justify-content: flex-end;
      transition: .22s ease;
    }
    .spec img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
    .spec::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(7,11,20,.15), rgba(7,11,20,.88)); }
    .spec-body { position: relative; z-index: 1; padding: 22px; }
    .spec:hover { transform: translateY(-6px); border-color: var(--line-strong); box-shadow: 0 0 28px rgba(26,95,191,.32); }
    .compare { background: var(--bg-1); }
    .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; box-shadow: inset -18px 0 18px -18px rgba(0,0,0,.45); }
    table { width: 100%; border-collapse: collapse; min-width: 720px; }
    th, td { text-align: left; padding: 16px 18px; vertical-align: top; font-size: 15px; }
    thead th { background: rgba(7,11,20,.8); color: #fff; font-weight: 600; border-bottom: 1px solid var(--hairline); }
    tbody td { border-bottom: 1px solid rgba(126,200,255,.1); color: var(--text-soft); }
    tbody tr:hover td { background: rgba(26,95,191,.12); }
    td.risk { border-left: 3px solid var(--seal); }
    td.ok { border-left: 3px solid var(--accent); }
    .cases {
      padding: 92px 0;
      background:
        linear-gradient(180deg, rgba(7,11,20,.78), rgba(7,11,20,.88)),
        url("/assets/images/fa45cb573cc1193d.jpg") center/cover fixed;
    }
    .idea {
      font-family: var(--font-serif); font-size: clamp(22px, 3vw, 32px); color: #fff; max-width: 820px; margin-bottom: 32px;
    }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { padding: 20px; }
    .case .meta { font-size: 12px; color: var(--hairline); letter-spacing: .08em; margin-bottom: 10px; }
    .milestones { background: var(--bg-0); }
    .timeline { position: relative; display: grid; gap: 0; }
    .timeline::before {
      content: ""; position: absolute; left: 18px; top: 8px; bottom: 8px; width: 1px; background: linear-gradient(180deg, var(--accent), rgba(201,163,106,.4));
    }
    .node { position: relative; padding: 0 0 28px 56px; }
    .node .dot {
      position: absolute; left: 10px; top: 6px; width: 18px; height: 18px; border-radius: 50%;
      border: 1px solid var(--accent); background: var(--bg-2); box-shadow: 0 0 12px rgba(126,200,255,.45);
    }
    .node h3 { margin-bottom: 6px; }
    .stories { background: var(--bg-1); }
    .story-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 16px; }
    .story { padding: 24px; }
    .tag {
      display: inline-block; font-size: 12px; padding: 3px 8px; border: 1px solid var(--line); color: var(--accent); margin-right: 6px; border-radius: 2px;
    }
    .stats {
      padding: 42px 0; background: #07101d; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
    }
    .stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; text-align: center; }
    .stat-row .n { font-size: 32px; color: #fff; }
    .stat-row .u { color: var(--accent); font-size: 13px; }
    .stat-row .l { color: var(--text-mute); font-size: 13px; margin-top: 4px; }
    .reviews { background: var(--bg-0); }
    .rev-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .rev { padding: 22px; }
    .stars { color: var(--hairline); letter-spacing: 2px; margin-bottom: 10px; }
    .avatar {
      width: 40px; height: 40px; border-radius: 4px; background: var(--primary); display: inline-flex; align-items: center; justify-content: center;
      font-size: 13px; margin-right: 10px; color: #fff;
    }
    .who { display: flex; align-items: center; margin-top: 16px; color: var(--text-mute); font-size: 13px; }
    .insights { background: var(--bg-1); }
    .news-list { display: grid; gap: 14px; }
    .news {
      display: grid; grid-template-columns: 220px 1fr auto; gap: 18px; align-items: center; padding: 12px; transition: .2s ease;
    }
    .news:hover { border-color: var(--line-strong); transform: translateY(-3px); }
    .news img { width: 220px; height: 124px; object-fit: cover; border-radius: 4px; }
    .news h3 { font-size: 18px; margin-bottom: 6px; }
    .news p { font-size: 14px; }
    .news-more { margin-top: 22px; }
    .guarantee { background: var(--bg-0); }
    .g-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .gcard { padding: 22px; }
    .gcard .ico { color: var(--hairline); font-size: 12px; letter-spacing: .16em; margin-bottom: 10px; }
    .quick { background: var(--bg-1); }
    .q-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .qtile {
      padding: 18px 16px; min-height: 118px; text-align: left; color: #fff; width: 100%;
      background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius); transition: .2s ease;
    }
    .qtile:hover { border-color: var(--line-strong); transform: translateY(-4px); }
    .qtile b { display: block; font-family: var(--font-serif); font-size: 16px; margin-bottom: 8px; }
    .qtile span { color: var(--text-mute); font-size: 13px; }
    .faq { background: var(--bg-0); }
    .acc { display: grid; gap: 10px; }
    .acc-item { overflow: hidden; }
    .acc-btn {
      width: 100%; text-align: left; background: transparent; border: 0; color: #fff;
      padding: 16px 18px; min-height: 56px; font-size: 16px; font-family: var(--font-serif); display: flex; justify-content: space-between; gap: 12px;
    }
    .acc-btn i { color: var(--accent); font-style: normal; }
    .acc-panel { display: none; padding: 0 18px 16px; color: var(--text-soft); font-size: 15px; }
    .acc-item.is-open .acc-panel { display: block; }
    .acc-item.is-open { border-color: var(--line-strong); }
    .consult {
      background:
        radial-gradient(600px 240px at 20% 0%, rgba(26,95,191,.25), transparent 70%),
        var(--bg-1);
    }
    .cta-band {
      display: flex; justify-content: space-between; align-items: center; gap: 20px;
      padding: 24px 28px; margin-bottom: 28px;
    }
    .form-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; }
    form { padding: 24px; }
    label { display: block; font-size: 13px; color: var(--text-mute); margin: 0 0 6px; }
    .field { margin-bottom: 14px; }
    input, select, textarea {
      width: 100%; min-height: 44px; border-radius: var(--radius-sm);
      border: 1px solid var(--line); background: rgba(7,11,20,.55); color: #fff; padding: 10px 12px;
    }
    textarea { min-height: 110px; resize: vertical; }
    .form-note { font-size: 13px; color: var(--text-mute); margin-top: 10px; }
    .form-ok { display: none; padding: 12px; border: 1px solid var(--accent); color: var(--accent); margin-bottom: 12px; }
    .form-err { display: none; padding: 12px; border: 1px solid var(--seal); color: #F3B4B8; margin-bottom: 12px; }
    .side-box { padding: 24px; }
    .side-box li { padding: 8px 0; border-bottom: 1px solid rgba(126,200,255,.1); color: var(--text-soft); font-size: 14px; }
    .site-footer {
      background: #050910; border-top: 1px solid rgba(201,163,106,.22); padding: 56px 0 24px; color: var(--text-mute);
    }
    .foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1.1fr 1fr; gap: 28px; margin-bottom: 32px; }
    .foot-grid h3 { font-size: 16px; color: #fff; }
    .foot-grid a { display: block; color: var(--text-soft); padding: 6px 0; min-height: 36px; }
    .copy { border-top: 1px solid rgba(255,255,255,.06); padding-top: 16px; font-size: 13px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
    @media (max-width: 1280px) {
      .meter-grid, .matrix-grid, .spec-grid, .case-grid, .rev-grid, .g-grid { grid-template-columns: repeat(2, 1fr); }
      .q-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 1024px) {
      .topbar-inner { grid-template-columns: 1fr 1fr; }
      .topbar-center { display: none; }
      .nav-links { display: none; }
      .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
      .intro-grid, .form-grid, .story-grid { grid-template-columns: 1fr; }
      .news { grid-template-columns: 160px 1fr; }
      .news .go { display: none; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .cta-band { flex-direction: column; align-items: flex-start; }
      .stat-row { grid-template-columns: repeat(2, 1fr); gap: 20px; }
      section { padding: 64px 0; }
    }
    @media (max-width: 768px) {
      .container { width: min(100% - 28px, var(--container)); }
      .hero, .hero-track, .slide-copy { min-height: 78vh; }
      .arrows { display: none; }
      .meter-grid, .matrix-grid, .spec-grid, .case-grid, .rev-grid, .g-grid, .q-grid { grid-template-columns: 1fr; }
      .news { grid-template-columns: 1fr; }
      .news img { width: 100%; height: 180px; }
      .foot-grid { grid-template-columns: 1fr; }
      .copy { flex-direction: column; }
      .topbar-inner { grid-template-columns: 1fr; min-height: 36px; }
      .topbar-right { text-align: left; }
    }
    @media (max-width: 520px) {
      body { font-size: 15px; }
      .btn { width: 100%; }
      .hero-actions { width: 100%; }
      .stat-row { grid-template-columns: 1fr 1fr; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation: none !important; transition: none !important; }
    }