:root {
      --bg: #0b0915;
      --bg-soft: #121024;
      --panel: #17132c;
      --panel-2: #20183b;
      --text: #f7f3ff;
      --muted: #b9afcf;
      --line: rgba(231, 207, 255, .16);
      --pink: #ff4db8;
      --purple: #965cff;
      --cyan: #63e6ff;
      --lime: #c9f36d;
      --container: 1180px;
      --shadow: 0 18px 50px rgba(0, 0, 0, .28);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background:
        radial-gradient(circle at 18% 14%, rgba(151, 76, 255, .15), transparent 25rem),
        radial-gradient(circle at 84% 38%, rgba(255, 46, 168, .09), transparent 24rem),
        var(--bg);
      color: var(--text);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: .22;
      background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
      background-size: 54px 54px;
      mask-image: linear-gradient(to bottom, black, transparent 70%);
      z-index: -1;
    }

    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    .container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
    .section { padding: 96px 0; position: relative; }
    .section-heading { max-width: 720px; margin-bottom: 42px; }
    .eyebrow {
      color: var(--cyan);
      font-size: .78rem;
      font-weight: 800;
      letter-spacing: .16em;
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1, h2, h3 { line-height: 1.18; }
    h1 { font-size: clamp(2.4rem, 6vw, 5.7rem); max-width: 780px; margin-bottom: 24px; letter-spacing: 0; }
    h2 { font-size: clamp(2rem, 4vw, 3.5rem); margin-bottom: 16px; }
    h3 { font-size: 1.18rem; }
    .lead { color: var(--muted); font-size: 1.12rem; max-width: 680px; }
    .accent { color: var(--pink); }
    .gradient-text { color: var(--pink); }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 0 22px;
      border: 1px solid transparent;
      border-radius: 5px;
      font-weight: 800;
      transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
      cursor: pointer;
    }
    .btn:hover { transform: translateY(-3px); }
    .btn-primary {
      color: #170b1f;
      background: linear-gradient(100deg, var(--pink), #ff8ccc);
      box-shadow: 0 10px 28px rgba(255, 77, 184, .28);
    }
    .btn-secondary {
      color: var(--text);
      border-color: rgba(255, 255, 255, .22);
      background: rgba(255, 255, 255, .045);
    }
    .btn-secondary:hover { background: rgba(255, 255, 255, .1); }
    .btn-cyan { color: #07161c; background: var(--cyan); }

    header {
      position: sticky;
      top: 0;
      z-index: 20;
      border-bottom: 1px solid var(--line);
      background: rgba(11, 9, 21, .86);
      backdrop-filter: blur(18px);
    }
    .nav-bar { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: flex; align-items: center; gap: 10px; min-width: 160px; }
    .ai-page-logo { width: 42px; max-width: 100%; height: auto; }
    .brand strong { font-size: 1.1rem; white-space: nowrap; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { color: #d8d0e8; font-size: .84rem; padding: 8px 10px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--pink); }
    .nav-action { flex-shrink: 0; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: transparent; color: var(--text); padding: 9px 12px; border-radius: 4px; }

    .hero { min-height: 720px; display: flex; align-items: center; padding: 84px 0 76px; overflow: hidden; }
    .hero-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 52px; align-items: center; }
    .hero-copy { position: relative; z-index: 2; }
    .hero-copy h1 { animation: rise .75s ease both; }
    .hero-copy .lead { animation: rise .75s .1s ease both; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; animation: rise .75s .2s ease both; }
    .hero-note { margin-top: 18px; color: #9388ab; font-size: .86rem; }
    .hero-visual { position: relative; min-height: 430px; display: grid; place-items: center; }
    .hero-visual::before {
      content: "";
      width: min(430px, 85vw);
      aspect-ratio: 1;
      border: 1px solid rgba(255, 77, 184, .34);
      transform: rotate(45deg);
      position: absolute;
      box-shadow: 0 0 70px rgba(143, 75, 255, .24), inset 0 0 60px rgba(255, 77, 184, .06);
      animation: spin 18s linear infinite;
    }
    .hero-visual::after {
      content: "";
      width: 260px;
      aspect-ratio: 1;
      border: 1px solid rgba(99, 230, 255, .45);
      position: absolute;
      transform: rotate(15deg);
      animation: float 5s ease-in-out infinite;
    }
    .signal-panel {
      width: min(330px, 88%);
      position: relative;
      z-index: 2;
      padding: 28px;
      border: 1px solid rgba(255, 255, 255, .17);
      background: rgba(25, 18, 52, .88);
      box-shadow: var(--shadow);
    }
    .signal-top { display: flex; justify-content: space-between; gap: 14px; color: var(--cyan); font-size: .78rem; }
    .signal-panel h3 { font-size: 1.8rem; margin: 28px 0 12px; }
    .signal-bars { display: grid; gap: 12px; margin-top: 24px; }
    .signal-bars span { display: block; height: 7px; background: linear-gradient(90deg, var(--pink), var(--purple)); }
    .signal-bars span:nth-child(2) { width: 78%; background: linear-gradient(90deg, var(--cyan), var(--purple)); }
    .signal-bars span:nth-child(3) { width: 56%; background: linear-gradient(90deg, var(--lime), var(--pink)); }

    .metric-strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.025); }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); }
    .metric { padding: 27px 22px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--pink); font-size: 2rem; line-height: 1; margin-bottom: 9px; }
    .metric span { color: var(--muted); font-size: .9rem; }

    .about-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 58px; align-items: start; }
    .about-copy { padding-right: 20px; }
    .principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .principle { background: var(--panel); padding: 24px; min-height: 164px; }
    .principle b { display: block; color: var(--cyan); margin-bottom: 9px; }
    .principle p { color: var(--muted); margin-bottom: 0; font-size: .93rem; }

    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .service-card { background: linear-gradient(145deg, rgba(32, 24, 59, .94), rgba(18, 14, 36, .94)); border: 1px solid var(--line); padding: 25px; transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease; }
    .service-card:hover { transform: translateY(-6px); border-color: rgba(255, 77, 184, .62); box-shadow: 0 16px 34px rgba(0,0,0,.23); }
    .service-card b { display: inline-block; color: var(--lime); font-size: .78rem; letter-spacing: .08em; margin-bottom: 17px; }
    .service-card h3 { margin-bottom: 9px; }
    .service-card p { color: var(--muted); margin-bottom: 0; font-size: .93rem; }

    .workflow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; counter-reset: flow; }
    .flow-item { position: relative; padding: 24px 20px; border-top: 2px solid var(--pink); background: rgba(255,255,255,.045); }
    .flow-item::before { counter-increment: flow; content: "0" counter(flow); color: var(--pink); font-weight: 900; font-size: 1.55rem; }
    .flow-item h3 { margin: 18px 0 8px; font-size: 1.05rem; }
    .flow-item p { color: var(--muted); font-size: .88rem; margin-bottom: 0; }

    .solution-band { background: linear-gradient(110deg, rgba(91, 38, 138, .2), rgba(255, 45, 155, .08)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .solution-item { display: flex; gap: 18px; align-items: flex-start; padding: 22px 0; border-bottom: 1px solid var(--line); }
    .solution-item span { color: var(--pink); font-size: 1.3rem; font-weight: 900; }
    .solution-item h3 { margin-bottom: 5px; }
    .solution-item p { color: var(--muted); margin-bottom: 0; }

    .network-box { display: grid; grid-template-columns: .78fr 1.22fr; gap: 34px; align-items: center; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
    .model-cloud span { padding: 7px 11px; color: #e9dbff; border: 1px solid rgba(150,92,255,.4); background: rgba(150,92,255,.1); font-size: .87rem; }
    .network-copy { padding: 30px; border-left: 3px solid var(--pink); background: rgba(255,255,255,.035); }
    .network-copy p { color: var(--muted); margin-bottom: 0; }

    .case-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 18px; }
    .case-card { border: 1px solid var(--line); background: var(--panel); padding: 24px; }
    .case-card.featured { grid-row: span 2; padding: 0; overflow: hidden; }
    .case-card.featured .case-media { padding: 22px; background: linear-gradient(135deg, #28134f, #59124b); }
    .case-card.featured .case-content { padding: 25px; }
    .case-media-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .case-media-grid .media-box:last-child { grid-column: span 2; }
    .media-box { aspect-ratio: 16 / 9; overflow: hidden; background: #25183c; }
    .media-box img { width: 100%; height: 100%; object-fit: cover; }
    .case-card p { color: var(--muted); font-size: .92rem; }
    .case-label { color: var(--cyan); font-size: .78rem; font-weight: 800; letter-spacing: .1em; }
    .case-card h3 { margin: 10px 0; }

    .comparison { overflow-x: auto; border: 1px solid var(--line); }
    table { width: 100%; min-width: 780px; border-collapse: collapse; background: rgba(21,16,43,.88); }
    th, td { text-align: left; padding: 17px 19px; border-bottom: 1px solid var(--line); }
    th { color: var(--cyan); font-size: .86rem; }
    td { color: var(--muted); font-size: .92rem; }
    td:first-child { color: var(--text); font-weight: 700; }
    .rating-box { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; margin-bottom: 28px; }
    .rating-score { font-size: 3.6rem; color: var(--pink); font-weight: 900; line-height: 1; }
    .stars { color: #ffd35a; letter-spacing: 4px; font-size: 1.35rem; }

    .tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
    .tags span { color: #e2d5f5; padding: 8px 12px; background: rgba(255,255,255,.05); border-left: 2px solid var(--purple); font-size: .86rem; }

    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .review { padding: 24px; border: 1px solid var(--line); background: rgba(255,255,255,.035); }
    .review .stars { font-size: .95rem; margin-bottom: 14px; }
    .review p { color: #ddd5e8; font-size: .94rem; }
    .review strong { display: block; color: var(--cyan); font-size: .9rem; }

    .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 11px 18px; align-items: start; }
    details { border: 1px solid var(--line); background: rgba(255,255,255,.035); }
    summary { cursor: pointer; list-style: none; padding: 18px 20px; font-weight: 700; display: flex; justify-content: space-between; gap: 12px; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; color: var(--pink); font-size: 1.25rem; line-height: 1; }
    details[open] summary::after { content: "−"; }
    details p { color: var(--muted); padding: 0 20px 18px; margin: 0; font-size: .9rem; }

    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-list a { min-height: 126px; padding: 18px; border: 1px solid var(--line); background: var(--panel); color: #e8ddf7; transition: transform .2s ease, border-color .2s ease; }
    .article-list a:hover { transform: translateY(-4px); border-color: var(--pink); }
    .article-list small { display: block; color: var(--pink); margin-bottom: 8px; }

    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 22px; align-items: start; }
    .contact-panel { padding: 30px; border: 1px solid var(--line); background: linear-gradient(135deg, rgba(56, 27, 78, .82), rgba(25, 18, 52, .9)); }
    .contact-panel p { color: var(--muted); }
    .contact-list { display: grid; gap: 13px; margin-top: 24px; }
    .contact-list div { color: #ded5e9; }
    .contact-list b { color: var(--cyan); margin-right: 7px; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    label { display: grid; gap: 7px; color: #dcd2e8; font-size: .9rem; }
    input, select, textarea { width: 100%; border: 1px solid var(--line); background: rgba(8,6,18,.72); color: var(--text); padding: 13px 14px; border-radius: 3px; font: inherit; outline: none; }
    input:focus, select:focus, textarea:focus { border-color: var(--pink); box-shadow: 0 0 0 3px rgba(255,77,184,.12); }
    textarea { min-height: 135px; resize: vertical; }
    .full { grid-column: 1 / -1; }
    .form-submit { margin-top: 19px; }
    .qr-wrap { margin-top: 25px; display: flex; align-items: center; gap: 16px; }
    .qr-wrap img { width: 92px; border: 5px solid #fff; }

    .footer-main { padding: 58px 0 30px; background: #080711; border-top: 1px solid var(--line); }
    .footer-grid { display: grid; grid-template-columns: 1.1fr .9fr .9fr; gap: 40px; }
    .footer-main p, .footer-main a { color: #a9a0ba; font-size: .9rem; }
    .footer-main h3 { color: var(--text); font-size: 1rem; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; }
    .footer-links a:hover { color: var(--pink); }
    .copyright { border-top: 1px solid var(--line); margin-top: 35px; padding-top: 20px; color: #7f778f; font-size: .82rem; display: flex; justify-content: space-between; gap: 15px; flex-wrap: wrap; }
    .float-contact, .back-top { position: fixed; right: 22px; z-index: 15; border: 1px solid rgba(255,255,255,.2); box-shadow: 0 12px 28px rgba(0,0,0,.3); }
    .float-contact { bottom: 78px; width: 48px; height: 48px; display: grid; place-items: center; color: #16091c; background: var(--cyan); border-radius: 50%; font-weight: 900; }
    .back-top { bottom: 20px; width: 48px; height: 42px; color: var(--text); background: var(--panel); cursor: pointer; }
    .reveal { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes rise { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
    @keyframes spin { to { transform: rotate(405deg); } }
    @keyframes float { 0%,100% { transform: translate(0,0) rotate(15deg); } 50% { transform: translate(0,-14px) rotate(19deg); } }

    @media (max-width: 1050px) {
      .nav-links a { padding-inline: 6px; font-size: .78rem; }
      .nav-action { display: none; }
      .hero-grid, .about-layout, .network-box, .contact-grid { grid-template-columns: 1fr; }
      .hero { padding-top: 64px; }
      .hero-visual { min-height: 320px; }
      .workflow { grid-template-columns: repeat(3, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }

    @media (max-width: 720px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      .section { padding: 68px 0; }
      .nav-bar { min-height: 68px; }
      .menu-toggle { display: block; }
      .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; padding: 12px 14px 18px; background: rgba(11,9,21,.98); border-bottom: 1px solid var(--line); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 10px; border-bottom: 1px solid rgba(255,255,255,.06); }
      .brand strong { font-size: 1rem; }
      h1 { font-size: 2.6rem; }
      .metrics, .service-grid, .reviews, .faq-grid, .footer-grid { grid-template-columns: 1fr; }
      .metric { border-right: 0; border-bottom: 1px solid var(--line); }
      .metric:last-child { border-bottom: 0; }
      .principles, .solution-grid, .case-grid, .workflow { grid-template-columns: 1fr; }
      .case-card.featured { grid-row: auto; }
      .case-media-grid { grid-template-columns: 1fr; }
      .case-media-grid .media-box:last-child { grid-column: auto; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .full { grid-column: auto; }
      .copyright { display: block; }
      .copyright span { display: block; margin-top: 8px; }
    }

    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
    }