:root {
      color-scheme: light;
      --ink: #182331;
      --muted: #5c6878;
      --line: #dce3ed;
      --paper: #f7f8fc;
      --white: #fff;
      --blue: #2846e8;
      --cyan: #0aa6a6;
      --coral: #ed5c55;
      --lime: #b6d943;
      --deep: #16243a;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255,255,255,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .header-inner { display: flex; align-items: center; gap: 22px; min-height: 72px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; text-decoration: none; font-weight: 800; }
    .ai-page-logo { display: block; width: 38px; max-width: 100%; height: auto; }
    .brand-name { font-size: 17px; white-space: nowrap; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex: 1; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 7px 8px; color: #465365; text-decoration: none; font-size: 12px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--blue); }
    .header-action { flex: 0 0 auto; }
    .menu-toggle { display: none; border: 1px solid var(--line); color: var(--ink); background: white; border-radius: 5px; padding: 8px 11px; cursor: pointer; }
    .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 46px; padding: 11px 18px; border: 1px solid transparent; border-radius: 5px;
      background: var(--blue); color: #fff; font-weight: 700; text-decoration: none;
      cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .button:hover { transform: translateY(-2px); box-shadow: 0 9px 20px rgba(40,70,232,.2); }
    .button-outline { color: var(--ink); border-color: #aeb9c9; background: rgba(255,255,255,.65); }
    .button-outline:hover { background: #fff; box-shadow: 0 8px 18px rgba(24,35,49,.09); }
    .hero {
      position: relative; overflow: hidden; color: var(--ink);
      background: linear-gradient(112deg, #eaf0ff 0%, #f4f5ff 48%, #e4f7f3 100%);
      border-bottom: 1px solid #d9e2f0;
    }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; }
    .hero::before { width: 270px; height: 270px; border: 1px solid rgba(40,70,232,.18); border-radius: 50%; right: 8%; top: 8%; box-shadow: 0 0 0 28px rgba(40,70,232,.035), 0 0 0 56px rgba(10,166,166,.035); animation: orbit 16s linear infinite; }
    .hero::after { width: 110px; height: 110px; right: 20%; top: 35%; border: 1px solid rgba(237,92,85,.25); transform: rotate(45deg); }
    .hero-inner { position: relative; z-index: 1; padding-block: 64px 50px; }
    .hero-copy { max-width: 700px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: #2846a3; font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 22px; height: 3px; background: var(--coral); }
    h1 { max-width: 660px; margin: 16px 0 16px; font-size: clamp(36px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy p { max-width: 640px; margin: 0; color: #455267; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 25px; }
    .hero-points { display: flex; flex-wrap: wrap; gap: 11px 22px; margin-top: 24px; color: #465365; font-size: 13px; }
    .hero-points span::before { content: "✓"; margin-right: 7px; color: var(--cyan); font-weight: 900; }
    .signal-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 45px; border-top: 1px solid #cbd7e9; }
    .signal { padding: 18px 20px 0 0; }
    .signal + .signal { padding-left: 20px; border-left: 1px solid #cbd7e9; }
    .signal strong { display: block; font-size: 17px; }
    .signal span { color: var(--muted); font-size: 12px; }
    .section { padding-block: 70px; }
    .section-white { background: #fff; }
    .section-dark { color: #f3f6fb; background: var(--deep); }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head > div { max-width: 720px; }
    .section-kicker { margin: 0 0 8px; color: var(--cyan); font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(27px, 3.3vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-head p { max-width: 560px; margin: 12px 0 0; color: var(--muted); }
    .section-dark .section-head p { color: #c1cada; }
    .intro-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 50px; align-items: start; }
    .intro-text { max-width: 680px; color: #4d5969; }
    .intro-text p { margin: 0 0 15px; }
    .platform-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 22px; margin: 0; padding: 0; list-style: none; }
    .platform-list li { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .platform-list strong { display: block; font-size: 14px; }
    .platform-list span { color: var(--muted); font-size: 12px; }
    .model-band { margin-top: 32px; padding: 22px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .model-band strong { margin-right: 10px; }
    .model-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 13px; }
    .model-tags span { padding: 5px 10px; border: 1px solid #d9e0ec; border-radius: 3px; background: #fff; color: #405064; font-size: 12px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 26px; }
    .service-item { padding: 21px 0 23px; border-top: 1px solid var(--line); }
    .service-item h3 { margin: 0 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item .service-index { display: block; margin-bottom: 12px; color: var(--coral); font-size: 11px; font-weight: 800; letter-spacing: .08em; }
    .production-band { padding: 30px; background: #eaf5f3; border-left: 4px solid var(--cyan); }
    .production-band h3 { margin: 0 0 9px; font-size: 21px; }
    .production-band p { max-width: 800px; margin: 0; color: #465b5d; }
    .workflow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: step; }
    .workflow-step { position: relative; padding-top: 16px; border-top: 2px solid #8ba0b9; counter-increment: step; }
    .workflow-step::before { content: "0" counter(step); display: block; margin-bottom: 13px; color: var(--coral); font-size: 13px; font-weight: 800; }
    .workflow-step h3 { margin: 0 0 6px; font-size: 16px; }
    .workflow-step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0 22px; }
    .industry-item { padding: 18px 0; border-bottom: 1px solid var(--line); }
    .industry-item strong { display: block; margin-bottom: 5px; font-size: 15px; }
    .industry-item span { color: var(--muted); font-size: 13px; }
    .network-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .network-item { padding: 20px 0 0; border-top: 2px solid var(--cyan); }
    .network-item h3 { margin: 0 0 7px; font-size: 18px; }
    .network-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 26px; align-items: stretch; }
    .case-feature { padding: 28px; background: #fff; border: 1px solid var(--line); }
    .case-feature h3 { margin: 0 0 9px; font-size: 21px; }
    .case-feature p { margin: 0; color: var(--muted); }
    .case-side { display: grid; gap: 18px; }
    .case-note { padding: 18px 0; border-bottom: 1px solid var(--line); }
    .case-note strong { display: block; margin-bottom: 5px; }
    .case-note span { color: var(--muted); font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 25px; }
    .review { padding: 22px 0; border-top: 1px solid rgba(255,255,255,.25); }
    .review p { margin: 0 0 14px; color: #e3e9f1; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: #aab8cc; font-size: 12px; }
    .rating-panel { display: flex; align-items: center; justify-content: space-between; gap: 26px; margin-bottom: 30px; padding: 22px 26px; background: #eaf7f4; border: 1px solid #b9e1d8; }
    .rating-score { display: flex; align-items: center; gap: 18px; }
    .rating-score strong { color: #163a35; font-size: 42px; line-height: 1; }
    .rating-score span { color: #315750; font-size: 13px; }
    .stars { color: #d98214; font-size: 21px; letter-spacing: 0; }
    .rating-panel p { max-width: 500px; margin: 0; color: #3d5e58; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; text-align: left; min-width: 740px; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #f0f3f8; color: #344255; font-size: 13px; }
    td { color: #4b5869; font-size: 13px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .table-highlight { color: #1a6f63; font-weight: 700; }
    .matching { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .matching-copy p { color: #c2cada; }
    .matching-copy .button { margin-top: 10px; }
    .match-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 20px; }
    .match-list div { padding: 15px 0; border-bottom: 1px solid rgba(255,255,255,.2); color: #eaf0f7; font-size: 14px; }
    .match-list strong { display: block; color: #a5e8de; }
    .token-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 38px; align-items: start; }
    .token-copy { color: var(--muted); }
    .token-copy p { margin-top: 0; }
    .token-table { border-top: 2px solid var(--blue); }
    .token-row { display: grid; grid-template-columns: 1fr 1.2fr; gap: 20px; padding: 14px 0; border-bottom: 1px solid var(--line); }
    .token-row strong { font-size: 14px; }
    .token-row span { color: var(--muted); font-size: 13px; }
    .faq-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 44px; align-items: start; }
    .faq-side p { color: var(--muted); }
    .faq-list details { border-top: 1px solid var(--line); }
    .faq-list details:last-child { border-bottom: 1px solid var(--line); }
    .faq-list summary { position: relative; padding: 16px 32px 16px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { content: "+"; position: absolute; right: 3px; top: 12px; color: var(--blue); font-size: 23px; font-weight: 400; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { margin: -4px 32px 17px 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0 18px; }
    .article-list a { display: block; padding: 15px 0; border-top: 1px solid var(--line); color: var(--ink); font-size: 13px; text-decoration: none; }
    .article-list a:hover { color: var(--blue); }
    .article-list span { display: block; margin-bottom: 4px; color: var(--muted); font-size: 11px; }
    .resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .resource-figure { margin: 0; }
    .resource-figure .image-frame { overflow: hidden; background: #e8edf4; border: 1px solid var(--line); }
    .resource-figure img { display: block; width: 100%; max-width: 100%; height: auto; object-fit: contain; }
    .resource-figure figcaption { padding-top: 9px; color: var(--muted); font-size: 13px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 46px; align-items: start; }
    .contact-copy p { color: var(--muted); }
    .contact-detail { padding: 13px 0; border-top: 1px solid var(--line); }
    .contact-detail strong { display: inline-block; min-width: 110px; }
    .contact-detail a { color: var(--blue); text-decoration: none; }
    .contact-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #cbd4e0; border-radius: 4px; background: #fff; color: var(--ink); padding: 11px 12px; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(40,70,232,.25); border-color: var(--blue); }
    .field textarea { min-height: 120px; resize: vertical; }
    .contact-form button { justify-self: start; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 26px 0 0; border-top: 1px solid var(--line); }
    .join-band p { margin: 7px 0 0; color: var(--muted); }
    .site-footer { margin-top: 0; padding: 28px 0; color: #334154; background: #edf1f7; border-top: 1px solid #d8e0eb; }
    .footer-inner { display: flex; justify-content: space-between; align-items: start; gap: 26px; }
    .footer-brand { font-weight: 800; }
    .footer-meta { color: #526074; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 16px; }
    .footer-links a { color: #34465d; font-size: 12px; text-decoration: none; }
    .footer-links a:hover { color: var(--blue); }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .float-contact a, .to-top { display: grid; place-items: center; width: 48px; min-height: 48px; padding: 5px; border: 1px solid #ccd6e4; border-radius: 5px; background: #fff; color: var(--ink); text-align: center; text-decoration: none; font-size: 11px; line-height: 1.2; box-shadow: 0 6px 20px rgba(24,35,49,.11); cursor: pointer; }
    .qr-pop { position: absolute; right: 58px; bottom: 51px; display: none; width: 170px; padding: 10px; border: 1px solid var(--line); background: #fff; box-shadow: 0 8px 28px rgba(24,35,49,.16); }
    .qr-pop img { display: block; width: 100%; height: auto; }
    .qr-pop span { display: block; padding-top: 5px; text-align: center; font-size: 12px; }
    .float-contact:hover .qr-pop, .float-contact:focus-within .qr-pop { display: block; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @keyframes orbit { to { transform: rotate(360deg); } }
    @media (max-width: 1000px) {
      .header-inner { gap: 14px; }
      .nav-links a { padding-inline: 5px; font-size: 11px; }
      .header-action { display: none; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .industry-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .header-inner { min-height: 64px; justify-content: space-between; }
      .menu-toggle { display: inline-flex; }
      .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; justify-content: flex-start; align-items: stretch; padding: 12px 16px 16px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 12px 18px rgba(24,35,49,.08); }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 8px 10px; font-size: 13px; }
      .hero-inner { padding-block: 54px 34px; }
      .hero::before { right: -110px; top: 13%; }
      .hero::after { right: 12%; top: 38%; }
      h1 { max-width: 540px; font-size: 42px; }
      .hero-copy p { font-size: 15px; }
      .signal-strip { grid-template-columns: repeat(2, 1fr); row-gap: 16px; }
      .signal:nth-child(3) { padding-left: 0; border-left: 0; }
      .signal:nth-child(3), .signal:nth-child(4) { border-top: 1px solid #cbd7e9; padding-top: 14px; }
      .section { padding-block: 54px; }
      .section-head { display: block; }
      .intro-grid, .case-grid, .matching, .token-layout, .faq-layout, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
      .platform-list { grid-template-columns: 1fr 1fr; }
      .workflow { grid-template-columns: repeat(2, 1fr); }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
      .network-row { grid-template-columns: 1fr; gap: 22px; }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(2, 1fr); }
      .rating-panel { align-items: flex-start; flex-direction: column; }
      .join-band { align-items: flex-start; flex-direction: column; }
      .footer-inner { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 480px) {
      .container { width: calc(100% - 28px); }
      h1 { font-size: 36px; }
      .hero-actions { align-items: stretch; flex-direction: column; max-width: 280px; }
      .signal { padding-right: 10px; }
      .signal + .signal { padding-left: 12px; }
      .service-grid, .platform-list, .industry-grid, .review-grid, .match-list, .resource-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr; gap: 20px; }
      .contact-form { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .rating-score { gap: 12px; }
      .rating-score strong { font-size: 36px; }
      .float-contact { right: 10px; bottom: 12px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }