:root {
      color-scheme: light;
      --ink: #22251f;
      --muted: #62665c;
      --paper: #fbfaf5;
      --white: #fff;
      --yellow: #f6c900;
      --yellow-deep: #e4b900;
      --green: #244a3b;
      --line: #e7e5dc;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 84px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, "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 {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(251, 250, 245, .96);
      border-bottom: 1px solid rgba(34, 37, 31, .1);
      backdrop-filter: blur(12px);
    }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 38px; height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 9px 10px; color: #41443d; font-size: 13px; text-decoration: none; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: #947600; }
    .nav-action, .button {
      display: inline-flex;
      justify-content: center;
      align-items: center;
      min-height: 44px;
      padding: 10px 18px;
      border: 1px solid var(--ink);
      background: var(--ink);
      color: #fff;
      font-weight: 700;
      text-decoration: none;
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-action { min-height: 38px; padding: 7px 14px; font-size: 13px; white-space: nowrap; }
    .button:hover, .nav-action:hover { transform: translateY(-2px); background: #3b4439; box-shadow: 0 8px 20px rgba(34,37,31,.16); }
    .button-yellow { border-color: var(--yellow); background: var(--yellow); color: var(--ink); }
    .button-yellow:hover { background: var(--yellow-deep); }
    .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; background: var(--yellow); border-bottom: 1px solid rgba(34,37,31,.13); }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 1px solid rgba(34,37,31,.18); border-radius: 50%; }
    .hero::before { width: 400px; height: 400px; right: -130px; top: -220px; }
    .hero::after { width: 250px; height: 250px; right: 60px; bottom: -190px; }
    .hero-inner { position: relative; z-index: 1; padding-block: 72px 54px; }
    .hero-copy { max-width: 760px; }
    .eyebrow { margin: 0 0 14px; font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
    h1 { max-width: 720px; margin: 0; font-size: clamp(38px, 6vw, 72px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy > p:not(.eyebrow) { max-width: 620px; margin: 22px 0 26px; font-size: 17px; color: #383a31; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .button-outline { border-color: rgba(34,37,31,.55); background: transparent; color: var(--ink); }
    .button-outline:hover { background: rgba(255,255,255,.32); }
    .hero-note { margin-top: 25px; font-size: 13px; color: #414238; }
    .hero-note strong { margin-right: 14px; }
    .hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 52px; border-top: 1px solid rgba(34,37,31,.25); }
    .hero-stat { padding: 18px 18px 0 0; }
    .hero-stat + .hero-stat { padding-left: 18px; border-left: 1px solid rgba(34,37,31,.25); }
    .hero-stat strong { display: block; font-size: 17px; }
    .hero-stat span { font-size: 12px; color: #4b4b40; }
    main { overflow: hidden; }
    .section { padding-block: 76px; }
    .section-white { background: var(--white); }
    .section-green { background: var(--green); color: #fff; }
    .section-yellow { background: #f2d95d; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 32px; }
    .section-head > div { max-width: 720px; }
    .section-kicker { margin: 0 0 8px; color: #7a6800; font-size: 12px; font-weight: 800; letter-spacing: .11em; }
    .section-green .section-kicker { color: #f4d94b; }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 42px); line-height: 1.18; letter-spacing: 0; }
    .section-head p { max-width: 570px; margin: 12px 0 0; color: var(--muted); }
    .section-green .section-head p { color: #dbe5de; }
    .text-link { color: #415b47; font-weight: 700; text-decoration-thickness: 1px; text-underline-offset: 4px; }
    .intro-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 50px; align-items: start; }
    .intro-copy { max-width: 690px; }
    .intro-copy p { color: var(--muted); }
    .intro-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px 22px; margin: 24px 0 0; padding: 0; list-style: none; }
    .intro-list li { padding-top: 12px; border-top: 1px solid var(--line); font-weight: 700; }
    .intro-list li span { display: block; margin-top: 3px; color: var(--muted); font-size: 13px; font-weight: 400; }
    .platform-note { padding: 24px; border-left: 4px solid var(--yellow); background: #f4f2e9; }
    .platform-note strong { display: block; margin-bottom: 8px; font-size: 18px; }
    .platform-note p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .service-item { min-height: 172px; padding: 24px; background: var(--white); transition: background .2s ease, transform .2s ease; }
    .service-item:hover { position: relative; z-index: 1; background: #fffbea; transform: translateY(-3px); }
    .service-index { display: block; margin-bottom: 18px; color: #8f7800; font-size: 12px; font-weight: 800; }
    .service-item h3, .case-item h3, .review h3 { margin: 0 0 8px; font-size: 18px; }
    .service-item p, .case-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 24px; counter-reset: step; }
    .workflow-step { padding-top: 16px; border-top: 2px solid rgba(255,255,255,.5); counter-increment: step; }
    .workflow-step::before { content: "0" counter(step); display: block; margin-bottom: 20px; color: var(--yellow); font-size: 13px; font-weight: 800; }
    .workflow-step h3 { margin: 0 0 8px; font-size: 18px; }
    .workflow-step p { margin: 0; color: #dbe5de; font-size: 14px; }
    .solution-columns { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 28px; }
    .solution-column { padding-top: 18px; border-top: 2px solid var(--ink); }
    .solution-column h3 { margin: 0 0 9px; font-size: 19px; }
    .solution-column p { margin: 0; color: #55594f; }
    .solution-column ul { margin: 14px 0 0; padding-left: 18px; color: #55594f; font-size: 14px; }
    .network-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
    .network-copy p { color: var(--muted); }
    .network-channels { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 26px; }
    .network-channel { padding: 16px 0; border-top: 1px solid var(--line); }
    .network-channel strong { display: block; }
    .network-channel span { color: var(--muted); font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 22px; align-items: start; }
    .case-feature { border: 1px solid var(--line); background: #fff; }
    .image-frame { overflow: hidden; background: #e9e7de; }
    .image-frame img { display: block; width: 100%; height: auto; }
    .case-feature-copy { padding: 21px 23px 24px; }
    .case-feature-copy p { margin: 7px 0 0; color: var(--muted); }
    .case-side { display: grid; gap: 18px; }
    .case-item { padding: 20px 0; border-top: 1px solid var(--line); }
    .case-item:first-child { border-top: 0; padding-top: 0; }
    .comparison-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 44px; align-items: start; }
    .score-block { padding: 26px; background: var(--yellow); }
    .score-block span { display: block; font-size: 13px; font-weight: 700; }
    .score-block strong { display: block; margin: 6px 0; font-size: 54px; line-height: 1; }
    .stars { color: #382f00; letter-spacing: 0; }
    .score-block p { margin: 12px 0 0; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--white); }
    table { width: 100%; border-collapse: collapse; text-align: left; }
    th, td { min-width: 132px; padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 13px; }
    th { background: #f0eee5; font-size: 12px; }
    td:first-child, th:first-child { min-width: 140px; font-weight: 700; }
    tr:last-child td { border-bottom: 0; }
    .match-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
    .match-copy p { color: var(--muted); }
    .tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .tag-list span { padding: 7px 10px; border: 1px solid #d8d5c9; background: #fff; color: #41443d; font-size: 12px; }
    .form-panel { padding: 26px; background: #f0eee5; }
    .form-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
    .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%; min-width: 0; padding: 11px 12px; border: 1px solid #d1cec2; border-radius: 0; background: #fff; color: var(--ink); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-foot { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 18px; }
    .form-foot small { color: var(--muted); }
    .reviews-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 22px; }
    .review { padding: 20px 0; border-top: 2px solid var(--yellow); }
    .review p { margin: 0 0 16px; color: #e3e9e4; font-size: 14px; }
    .review h3 { font-size: 15px; }
    .review span { color: #c5d1c9; font-size: 12px; }
    .rating { margin-bottom: 12px; color: var(--yellow); font-size: 14px; }
    .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 { content: "+"; position: absolute; right: 4px; top: 14px; font-size: 23px; font-weight: 400; transition: transform .2s ease; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item p { max-width: 800px; margin: 0; padding: 0 30px 18px 0; color: var(--muted); }
    .article-grid { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 14px; }
    .article-link { display: flex; min-height: 98px; flex-direction: column; justify-content: space-between; padding: 16px; border: 1px solid var(--line); background: #fff; text-decoration: none; transition: border-color .2s ease, transform .2s ease; }
    .article-link:hover { border-color: #b99d12; transform: translateY(-3px); }
    .article-link strong { font-size: 14px; }
    .article-link span { color: var(--muted); font-size: 12px; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 52px; padding: 24px 0; border-top: 1px solid var(--line); }
    .join-band h3 { margin: 0 0 4px; font-size: 19px; }
    .join-band p { margin: 0; color: var(--muted); font-size: 14px; }
    .site-footer { background: #eae8df; color: #252820; }
    .footer-main { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; padding-block: 42px 30px; }
    .footer-brand p { max-width: 460px; color: #55594f; font-size: 14px; }
    .footer-contact { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px 24px; align-content: start; }
    .footer-contact p { margin: 0; font-size: 14px; }
    .footer-contact strong { display: block; font-size: 12px; color: #686b60; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 16px 0; border-top: 1px solid #d4d2c7; }
    .footer-links a { color: #3d493d; font-size: 13px; text-decoration: underline; text-underline-offset: 3px; }
    .footer-bottom { padding: 14px 0 20px; border-top: 1px solid #d4d2c7; color: #56594f; font-size: 12px; }
    .footer-bottom-row { display: flex; justify-content: space-between; gap: 12px; }
    .floating-contact { position: fixed; right: 20px; bottom: 20px; z-index: 15; }
    .floating-contact a { display: inline-flex; align-items: center; gap: 8px; padding: 12px 16px; border: 1px solid var(--ink); background: var(--yellow); color: var(--ink); font-size: 13px; font-weight: 800; text-decoration: none; box-shadow: 0 5px 18px rgba(34,37,31,.15); }
    .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; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 1050px) {
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-action { margin-left: auto; }
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 12px max(20px, calc((100vw - var(--container))/2)); border-bottom: 1px solid var(--line); background: var(--paper); align-items: stretch; flex-direction: column; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 11px 4px; border-bottom: 1px solid var(--line); }
      .nav-row { gap: 12px; }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-action { display: none; }
      .hero-inner { padding-block: 54px 36px; }
      .hero-copy > p:not(.eyebrow) { font-size: 15px; }
      .hero-stats { grid-template-columns: repeat(2,1fr); margin-top: 36px; }
      .hero-stat { padding: 14px 10px 12px 0; }
      .hero-stat + .hero-stat { padding-left: 12px; }
      .hero-stat:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid rgba(34,37,31,.25); }
      .hero-stat:nth-child(4) { border-top: 1px solid rgba(34,37,31,.25); }
      .section { padding-block: 54px; }
      .section-head { display: block; margin-bottom: 24px; }
      .section-head > a { display: inline-block; margin-top: 12px; }
      .intro-grid, .network-layout, .comparison-layout, .match-layout, .case-grid { grid-template-columns: 1fr; gap: 28px; }
      .service-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .service-item { padding: 19px; }
      .workflow { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 22px; }
      .solution-columns { grid-template-columns: 1fr; gap: 22px; }
      .reviews-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px 22px; }
      .article-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .article-link:last-child { grid-column: 1 / -1; }
      .footer-main { grid-template-columns: 1fr; gap: 20px; }
      .join-band { align-items: flex-start; flex-direction: column; }
      .form-foot { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 480px) {
      .brand { gap: 7px; font-size: 14px; }
      .ai-page-logo { width: 32px; height: 32px; }
      .nav-row { min-height: 64px; }
      .nav-links { top: 64px; }
      .hero-actions .button { width: 100%; }
      .intro-list, .service-grid, .workflow, .network-channels, .reviews-grid, .form-grid, .footer-contact { grid-template-columns: 1fr; }
      .field-full { grid-column: auto; }
      .service-item { min-height: auto; }
      .footer-bottom-row { flex-direction: column; }
      .floating-contact { right: 12px; bottom: 12px; }
      .floating-contact a { padding: 10px 12px; }
    }