:root {
      color-scheme: light;
      --ink: #172332;
      --muted: #5d6b79;
      --line: #dfe6ed;
      --paper: #f6f8fc;
      --white: #fff;
      --blue: #165dce;
      --cyan: #00a8b5;
      --coral: #f06e55;
      --lime: #b4d843;
      --deep: #10243b;
      --shadow: 0 14px 38px rgba(24, 48, 78, .09);
      --wrap: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 84px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    img { display: block; max-width: 100%; height: auto; }
    .container { width: min(var(--wrap), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky; z-index: 20; top: 0;
      border-bottom: 1px solid rgba(223,230,237,.85);
      background: rgba(255,255,255,.94);
      backdrop-filter: blur(14px);
    }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; font-size: 19px; }
    .brand img { width: 36px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; color: #3c4b5a; font-size: 13px; }
    .nav-links a { padding: 9px 10px; border-radius: 6px; transition: background .2s, color .2s; }
    .nav-links a:hover { color: var(--blue); background: #eef4ff; }
    .nav-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 6px; background: var(--white); color: var(--ink); cursor: pointer; }
    .button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 8px; padding: 0 19px; border: 1px solid transparent; border-radius: 5px; font-weight: 700; transition: transform .2s, box-shadow .2s, background .2s; cursor: pointer; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(22,93,206,.2); }
    .button-primary { background: var(--blue); color: #fff; }
    .button-dark { background: var(--deep); color: #fff; }
    .button-outline { border-color: #b9c9dd; color: var(--deep); background: #fff; }
    .hero { position: relative; overflow: hidden; color: #fff; background: var(--deep); }
    .hero::before {
      content: ""; position: absolute; inset: 0;
      background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
      background-size: 42px 42px; mask-image: linear-gradient(90deg, #000, transparent 85%);
    }
    .hero::after { content: ""; position: absolute; width: 310px; height: 310px; right: 8%; top: 2%; border: 1px solid rgba(91,221,229,.38); border-radius: 50%; box-shadow: 0 0 0 34px rgba(91,221,229,.05), 0 0 0 74px rgba(91,221,229,.035); }
    .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0,1.3fr) minmax(280px,.7fr); gap: 44px; align-items: center; padding-block: 76px 66px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 16px; color: #67d9de; font-size: 13px; font-weight: 700; letter-spacing: 1px; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--coral); }
    h1 { max-width: 760px; margin: 0; font-size: clamp(38px, 6vw, 66px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 640px; margin: 21px 0 26px; color: #d2deec; font-size: 17px; }
    .hero-buttons { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero .button-outline { border-color: #58718e; background: transparent; color: #fff; }
    .hero-notes { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 26px; color: #cad6e4; font-size: 13px; }
    .hero-notes span::before { content: "✓"; margin-right: 7px; color: #76e2d1; }
    .hero-panel { position: relative; z-index: 1; padding: 25px; border: 1px solid rgba(146,196,227,.32); border-radius: 8px; background: rgba(255,255,255,.07); }
    .hero-panel h2 { margin: 0 0 16px; font-size: 16px; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 6px 10px; border: 1px solid rgba(185,215,237,.28); border-radius: 4px; color: #e2edf7; font-size: 12px; }
    .hero-panel-note { margin: 17px 0 0; color: #bdcada; font-size: 13px; }
    .metric-band { position: relative; z-index: 2; margin-top: -1px; background: #fff; border-bottom: 1px solid var(--line); }
    .metrics { display: grid; grid-template-columns: repeat(4,1fr); }
    .metric { padding: 22px 20px; border-right: 1px solid var(--line); }
    .metric:first-child { border-left: 1px solid var(--line); }
    .metric strong { display: block; color: var(--blue); font-size: 22px; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 13px; }
    main { overflow: hidden; }
    .section { padding-block: 76px; }
    .section-alt { background: #fff; }
    .section-dark { color: #f4f8fc; background: #142a43; }
    .section-head { max-width: 710px; margin-bottom: 32px; }
    .kicker { margin: 0 0 8px; color: var(--cyan); font-size: 12px; font-weight: 800; letter-spacing: 1.3px; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-head > p:last-child { margin: 13px 0 0; color: var(--muted); }
    .section-dark .section-head > p:last-child { color: #c2d0df; }
    .intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: start; }
    .intro-copy { color: var(--muted); }
    .intro-copy p { margin: 0 0 16px; }
    .feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 22px; margin: 22px 0 0; padding: 0; list-style: none; }
    .feature-list li { padding: 11px 0; border-bottom: 1px solid var(--line); font-weight: 650; }
    .feature-list li::before { content: "＋"; margin-right: 8px; color: var(--coral); }
    .service-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
    .service-item { min-height: 160px; padding: 20px; border: 1px solid var(--line); border-radius: 6px; background: #fff; transition: transform .2s, box-shadow .2s, border-color .2s; }
    .service-item:hover { transform: translateY(-4px); border-color: #a9c5ed; box-shadow: var(--shadow); }
    .service-item .index { display: block; margin-bottom: 18px; color: var(--coral); font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 0 0 7px; font-size: 16px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .showcase-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
    .showcase { overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
    .showcase-media { aspect-ratio: 16 / 9; overflow: hidden; background: #e9eef5; }
    .showcase-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
    .showcase:hover img { transform: scale(1.035); }
    .showcase-body { padding: 18px; }
    .showcase-body h3 { margin: 0 0 7px; font-size: 17px; }
    .showcase-body p { margin: 0; color: var(--muted); font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; counter-reset: step; }
    .workflow article { position: relative; padding: 4px 24px 4px 0; }
    .workflow article::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 16px; color: var(--coral); font-size: 13px; font-weight: 800; }
    .workflow article:not(:last-child)::after { content: ""; position: absolute; left: 35px; top: 11px; width: calc(100% - 55px); border-top: 1px solid #8095aa; }
    .workflow h3 { margin: 0 0 7px; font-size: 17px; }
    .workflow p { margin: 0; color: #c2d0df; font-size: 13px; }
    .industry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 36px; }
    .industry-row { display: grid; grid-template-columns: 125px 1fr; gap: 15px; padding: 17px 0; border-bottom: 1px solid var(--line); }
    .industry-row strong { color: var(--deep); }
    .industry-row span { color: var(--muted); font-size: 14px; }
    .network-strip { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-strip span { padding: 9px 12px; border: 1px solid #d3dee9; border-radius: 4px; background: #fff; color: #33475b; font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .review { padding: 20px; border-top: 3px solid var(--cyan); background: #fff; box-shadow: 0 5px 20px rgba(24,48,78,.05); }
    .review p { margin: 0 0 18px; color: #364657; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .review-mark { margin-bottom: 10px; color: #df814b; letter-spacing: 2px; }
    .score-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 28px; align-items: start; }
    .score-card { padding: 26px; border-radius: 6px; background: #eaf5f5; }
    .score-card strong { display: block; color: #087f86; font-size: 54px; line-height: 1; }
    .score-card .stars { margin: 10px 0; color: #e19332; font-size: 21px; letter-spacing: 2px; }
    .score-card p { margin: 0; color: #405962; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 560px; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 13px; }
    th { color: var(--deep); background: #edf3f8; }
    td { color: #4b5b6b; }
    tr:last-child td { border-bottom: 0; }
    .good { color: #087f70; font-weight: 700; }
    .token-line { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 20px; padding: 19px 0; border-bottom: 1px solid var(--line); }
    .token-line h3 { margin: 0 0 4px; font-size: 16px; }
    .token-line p { margin: 0; color: var(--muted); font-size: 13px; }
    .token-line a { color: var(--blue); font-size: 13px; font-weight: 700; }
    .faq-list { display: grid; gap: 9px; }
    .faq-item { border: 1px solid var(--line); border-radius: 5px; background: #fff; }
    .faq-item summary { position: relative; padding: 16px 48px 16px 18px; cursor: pointer; list-style: none; font-weight: 700; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 18px; top: 12px; color: var(--blue); font-size: 23px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-answer { padding: 0 18px 16px; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5,1fr); gap: 10px; }
    .article-link { display: flex; min-height: 104px; flex-direction: column; justify-content: space-between; padding: 15px; border: 1px solid var(--line); background: #fff; transition: border-color .2s, transform .2s; }
    .article-link:hover { transform: translateY(-3px); border-color: var(--cyan); }
    .article-link strong { font-size: 14px; }
    .article-link span { color: var(--blue); font-size: 12px; }
    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .contact-copy p { color: #cad6e4; }
    .contact-details { display: grid; gap: 10px; margin-top: 22px; }
    .contact-details a, .contact-details span { color: #eff5fb; font-size: 14px; }
    .contact-details strong { display: inline-block; min-width: 92px; color: #78d8d7; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; padding: 24px; border-radius: 6px; background: #fff; color: var(--ink); }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { color: #3d4d5d; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 11px; border: 1px solid #ccd7e2; border-radius: 4px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 110px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(22,93,206,.2); border-color: var(--blue); }
    .contact-form .button { grid-column: 1 / -1; justify-self: start; }
    .form-note { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 12px; }
    .join-strip { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px 0; border-bottom: 1px solid rgba(255,255,255,.2); }
    .join-strip h3 { margin: 0 0 4px; }
    .join-strip p { margin: 0; color: #c2d0df; font-size: 14px; }
    .site-footer { padding: 27px 0 32px; background: #fff; color: #435365; }
    .footer-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 28px; }
    .footer-brand { font-weight: 800; color: var(--deep); }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13px; }
    .footer-links a:hover { color: var(--blue); }
    .footer-bottom { display: flex; justify-content: space-between; gap: 15px; margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--line); color: #637181; font-size: 12px; }
    .qr-widget { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: grid; justify-items: center; gap: 6px; width: 70px; padding: 8px; border: 1px solid var(--line); border-radius: 6px; background: #fff; box-shadow: var(--shadow); color: var(--deep); font-size: 11px; }
    .qr-widget img { width: 52px; aspect-ratio: 1; object-fit: cover; }
    .back-top { position: fixed; z-index: 14; right: 31px; bottom: 124px; width: 42px; height: 42px; border: 0; border-radius: 5px; background: var(--blue); color: #fff; cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; }
    .back-top.visible { opacity: 1; pointer-events: auto; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 1000px) {
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-actions .button { display: none; }
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 10px 20px 16px; border-bottom: 1px solid var(--line); background: #fff; box-shadow: 0 12px 20px rgba(24,48,78,.08); }
      .nav-links.open { display: grid; grid-template-columns: repeat(3,1fr); }
      .nav-links a { padding: 11px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .article-list { grid-template-columns: repeat(3,1fr); }
    }
    @media (max-width: 720px) {
      .container { width: min(var(--wrap), calc(100% - 32px)); }
      .hero-inner { grid-template-columns: 1fr; gap: 28px; padding-block: 55px 48px; }
      .hero::after { width: 180px; height: 180px; right: -50px; top: 28px; }
      .hero-panel { max-width: 510px; }
      .metrics { grid-template-columns: repeat(2,1fr); }
      .metric { border-bottom: 1px solid var(--line); }
      .metric:nth-child(odd) { border-left: 1px solid var(--line); }
      .section { padding-block: 55px; }
      .intro-grid, .score-layout, .contact-layout { grid-template-columns: 1fr; gap: 25px; }
      .showcase-grid { grid-template-columns: 1fr 1fr; }
      .workflow { grid-template-columns: repeat(2,1fr); gap: 23px 10px; }
      .workflow article:nth-child(2)::after { display: none; }
      .industry-grid { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: 1fr 1fr; }
      .article-list { grid-template-columns: repeat(2,1fr); }
      .footer-top, .footer-bottom { flex-direction: column; }
      .qr-widget { right: 10px; bottom: 10px; width: 62px; }
      .qr-widget img { width: 46px; }
      .back-top { right: 20px; bottom: 92px; }
    }
    @media (max-width: 480px) {
      .brand { font-size: 17px; }
      .hero-copy { font-size: 15px; }
      .hero-buttons .button { flex: 1 1 auto; padding-inline: 13px; }
      .nav-links.open { grid-template-columns: repeat(2,1fr); }
      .service-grid, .showcase-grid, .review-grid { grid-template-columns: 1fr; }
      .feature-list { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .industry-row { grid-template-columns: 105px 1fr; gap: 10px; }
      .contact-form { grid-template-columns: 1fr; padding: 18px; }
      .field-full, .contact-form .button, .form-note { grid-column: 1; }
      .join-strip { align-items: flex-start; flex-direction: column; }
      .article-link { min-height: 98px; }
    }