:root {
      color-scheme: light;
      --ink: #20251f;
      --muted: #60685e;
      --paper: #fffdf6;
      --white: #ffffff;
      --line: #e8e5d8;
      --yellow: #f5d522;
      --yellow-deep: #e1b900;
      --green: #315e44;
      --green-soft: #eaf1e8;
      --coral: #d96a4d;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header { background: rgba(255,253,246,.96); border-bottom: 1px solid var(--line); }
    .nav-row { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { width: 42px; height: 42px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 11px; color: #465046; font-size: 14px; text-decoration: none; }
    .nav-links a:hover, .nav-links a:focus-visible { color: #8b7000; }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 10px 19px; border: 1px solid var(--ink); background: var(--ink); color: #fff; font-weight: 700; text-decoration: none; transition: transform .2s, box-shadow .2s, background .2s; }
    .nav-cta { min-height: 40px; padding: 8px 14px; font-size: 14px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(32,37,31,.15); }
    .button-yellow { background: var(--yellow); border-color: var(--yellow); color: var(--ink); }
    .button-outline { background: transparent; color: var(--ink); }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: var(--white); color: var(--ink); cursor: pointer; }
    .hero { position: relative; overflow: hidden; padding: 76px 0 62px; background: var(--yellow); }
    .hero::before { position: absolute; inset: 0; content: ""; opacity: .38; pointer-events: none; background-image: linear-gradient(90deg, transparent 49.5%, rgba(32,37,31,.09) 50%, transparent 50.5%), linear-gradient(rgba(32,37,31,.08) 1px, transparent 1px); background-size: 74px 74px; }
    .hero-inner { position: relative; display: grid; grid-template-columns: 1.12fr .88fr; gap: 48px; align-items: center; }
    .eyebrow { margin: 0 0 15px; color: #465046; font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
    h1 { max-width: 690px; margin: 0; font-size: clamp(38px, 6vw, 68px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy { max-width: 630px; margin: 22px 0 27px; color: #343b32; font-size: 18px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
    .hero-note { margin-top: 17px; color: #444b40; font-size: 13px; }
    .hero-panel { padding: 25px; border: 1px solid rgba(32,37,31,.3); background: rgba(255,255,255,.62); }
    .hero-panel h2 { margin: 0 0 18px; font-size: 19px; }
    .model-cloud { display: flex; gap: 8px; flex-wrap: wrap; }
    .model-cloud span { padding: 7px 10px; border: 1px solid rgba(32,37,31,.23); background: rgba(255,255,255,.72); color: #30372f; font-size: 13px; }
    .hero-panel p { margin: 18px 0 0; color: #4f564d; font-size: 14px; }
    .ticker { border-bottom: 1px solid var(--line); background: #fff; }
    .metrics { display: grid; grid-template-columns: repeat(4,1fr); }
    .metric { padding: 20px 16px; border-right: 1px solid var(--line); }
    .metric:first-child { padding-left: 0; }
    .metric:last-child { border: 0; }
    .metric strong { display: block; font-size: 18px; }
    .metric span { color: var(--muted); font-size: 13px; }
    main section { padding: 72px 0; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
    .section-head h2 { margin: 0; font-size: clamp(27px, 4vw, 40px); line-height: 1.2; }
    .section-head p { max-width: 540px; margin: 0; color: var(--muted); }
    .kicker { margin: 0 0 9px; color: #897000; font-size: 13px; font-weight: 800; }
    .intro-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 52px; align-items: start; }
    .intro-layout h2 { margin: 0; font-size: 35px; line-height: 1.2; }
    .intro-copy { color: var(--muted); }
    .intro-copy p:first-child { margin-top: 0; }
    .capability-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 0 25px; border-top: 1px solid var(--line); }
    .capability { padding: 22px 4px; border-bottom: 1px solid var(--line); }
    .capability h3 { margin: 0 0 8px; font-size: 18px; }
    .capability p { margin: 0; color: var(--muted); font-size: 14px; }
    .capability .number { display: block; margin-bottom: 12px; color: #9b8100; font-size: 12px; font-weight: 800; }
    .soft-band { background: #f2f4ed; }
    .flow { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; counter-reset: flow; }
    .flow-step { position: relative; padding: 18px 22px 18px 0; border-top: 2px solid #b4c3af; counter-increment: flow; }
    .flow-step::before { content: "0" counter(flow); display: block; margin-bottom: 15px; color: var(--green); font-size: 14px; font-weight: 800; }
    .flow-step h3 { margin: 0 0 7px; font-size: 18px; }
    .flow-step p { margin: 0; color: var(--muted); font-size: 14px; }
    .media-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .media-frame { overflow: hidden; background: #eceee7; }
    .media-frame img { display: block; width: 100%; height: auto; }
    .media-caption { margin-top: 10px; color: var(--muted); font-size: 14px; }
    .case-strip { display: grid; grid-template-columns: repeat(3,1fr); gap: 0; border-top: 1px solid var(--line); }
    .case { padding: 22px 22px 22px 0; border-bottom: 1px solid var(--line); }
    .case + .case { padding-left: 22px; border-left: 1px solid var(--line); }
    .case h3 { margin: 0 0 9px; font-size: 18px; }
    .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .reviews { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .review { padding: 20px; border: 1px solid var(--line); background: var(--white); }
    .review blockquote { margin: 0 0 18px; color: #41483f; }
    .review footer { color: var(--muted); font-size: 13px; }
    .review strong { display: block; color: var(--ink); font-size: 14px; }
    .score-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 38px; align-items: start; }
    .score-panel { padding: 26px; background: var(--green); color: #fff; }
    .score-panel .stars { color: #ffe15a; font-size: 24px; letter-spacing: 0; }
    .score-panel strong { display: block; margin-top: 8px; font-size: 50px; line-height: 1.1; }
    .score-panel p { margin-bottom: 0; color: #e6eee5; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 550px; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); }
    th { background: #f2f4ed; font-size: 14px; }
    td { color: #4e564c; font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .yes { color: #315e44; font-weight: 700; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 18px 38px 18px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { position: absolute; right: 4px; content: "+"; color: #927700; font-size: 23px; line-height: 1; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 850px; margin: 0 0 19px; color: var(--muted); }
    .news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
    .news-item { padding: 20px 0; border-top: 2px solid var(--green); }
    .news-item h3 { margin: 0 0 8px; font-size: 18px; }
    .news-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .shortcode { display: none; }
    .contact-band { background: #e8efe5; }
    .contact-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 46px; align-items: start; }
    .contact-copy h2 { margin: 0 0 14px; font-size: 36px; line-height: 1.2; }
    .contact-copy > p { color: var(--muted); }
    .contact-details { margin: 25px 0 0; padding: 0; list-style: none; }
    .contact-details li { padding: 8px 0; border-bottom: 1px solid #d5dfd2; }
    .contact-details a { text-decoration-thickness: 1px; text-underline-offset: 3px; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 23px; border: 1px solid #d3ddd0; background: #fff; }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #d8ddd5; border-radius: 0; background: #fff; color: var(--ink); }
    .field textarea { min-height: 115px; resize: vertical; }
    .contact-form button { justify-self: start; cursor: pointer; }
    .qr-row { display: flex; align-items: center; gap: 14px; margin-top: 22px; }
    .qr-row img { width: 88px; border: 1px solid #d8ddd5; background: #fff; }
    .qr-row span { color: var(--muted); font-size: 13px; }
    .join-row { display: flex; align-items: center; justify-content: space-between; gap: 25px; padding: 25px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .join-row h2 { margin: 0 0 5px; font-size: 24px; }
    .join-row p { margin: 0; color: var(--muted); }
    .site-footer { padding: 30px 0 24px; background: #20251f; color: #f5f5ee; }
    .footer-top { display: flex; justify-content: space-between; gap: 30px; align-items: start; }
    .footer-top p { max-width: 480px; margin: 8px 0 0; color: #d0d5cb; font-size: 14px; }
    .footer-links { display: flex; gap: 9px 16px; flex-wrap: wrap; justify-content: flex-end; max-width: 570px; }
    .footer-links a { color: #f5f5ee; font-size: 13px; text-decoration-color: #8b9489; text-underline-offset: 4px; }
    .copyright { margin-top: 22px; padding-top: 15px; border-top: 1px solid #454b43; color: #c8cec5; font-size: 12px; }
    .float-actions { position: fixed; right: 18px; bottom: 20px; z-index: 5; display: grid; gap: 8px; }
    .float-actions a { display: grid; width: 48px; height: 48px; place-items: center; border: 1px solid var(--ink); background: var(--yellow); color: var(--ink); font-size: 12px; font-weight: 800; text-decoration: none; box-shadow: 0 3px 12px rgba(32,37,31,.12); }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .5s ease, transform .5s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 900px) {
      .nav-row { gap: 12px; }
      .nav-links a { padding-inline: 7px; font-size: 13px; }
      .hero-inner { grid-template-columns: 1fr .8fr; gap: 25px; }
      .capability-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 66px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-cta { margin-left: auto; }
      .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; z-index: 10; padding: 9px 16px 15px; border-bottom: 1px solid var(--line); background: var(--paper); justify-content: flex-start; }
      .nav-links.is-open { display: grid; grid-template-columns: 1fr 1fr; }
      .nav-links a { padding: 10px; }
      .hero { padding: 55px 0 42px; }
      .hero-inner, .intro-layout, .score-layout, .contact-layout { grid-template-columns: 1fr; }
      .hero-panel { max-width: 520px; }
      .hero-copy { font-size: 16px; }
      main section { padding: 54px 0; }
      .metrics { grid-template-columns: 1fr 1fr; }
      .metric { border-bottom: 1px solid var(--line); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(3) { padding-left: 0; border-bottom: 0; }
      .metric:nth-child(4) { border-bottom: 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 12px; }
      .flow { grid-template-columns: 1fr 1fr; gap: 18px; }
      .case-strip { grid-template-columns: 1fr; }
      .case, .case + .case { padding: 18px 0; border-left: 0; }
      .reviews { grid-template-columns: 1fr 1fr; }
      .news-grid { grid-template-columns: 1fr; gap: 0; }
      .footer-top { display: block; }
      .footer-links { justify-content: flex-start; margin-top: 20px; }
    }
    @media (max-width: 480px) {
      .brand span { font-size: 15px; }
      .ai-page-logo { width: 36px; height: 36px; }
      .nav-cta { min-height: 38px; padding: 7px 10px; font-size: 13px; }
      .hero-actions .button { width: 100%; }
      .capability-grid, .reviews { grid-template-columns: 1fr; }
      .media-grid { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; padding: 17px; }
      .field-full { grid-column: auto; }
      .join-row { align-items: flex-start; flex-direction: column; }
      .float-actions { right: 10px; bottom: 12px; }
      .float-actions a { width: 44px; height: 44px; }
    }