:root {
      --ink: #12333b;
      --muted: #60777d;
      --teal: #0b9290;
      --teal-deep: #086c70;
      --cyan: #39c6c4;
      --mint: #e9fbf8;
      --line: #d9eceb;
      --paper: #f6fbfa;
      --white: #ffffff;
      --orange: #f28d55;
      --shadow: 0 18px 45px rgba(13, 92, 96, .11);
      --radius: 18px;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; height: auto; }
    button, input, select, textarea { font: inherit; }
    .container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(246, 251, 250, .94);
      border-bottom: 1px solid rgba(217, 236, 235, .9);
      backdrop-filter: blur(14px);
    }
    .nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: flex; align-items: center; min-width: 160px; }
    .ai-page-logo { width: 128px; }
    .nav-links { display: flex; align-items: center; gap: 0; flex-wrap: wrap; justify-content: flex-end; }
    .nav-links a { padding: 10px 12px; color: #42646a; font-size: 14px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--teal-deep); background: var(--mint); }
    .nav-cta, .primary-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: 0;
      border-radius: 9px;
      padding: 12px 20px;
      color: #fff;
      background: var(--teal-deep);
      font-weight: 700;
      cursor: pointer;
      transition: transform .2s, box-shadow .2s, background .2s;
    }
    .nav-cta:hover, .primary-btn:hover { transform: translateY(-2px); background: #075b60; box-shadow: 0 10px 24px rgba(8, 108, 112, .22); }
    .menu-toggle { display: none; border: 1px solid var(--line); color: var(--ink); background: #fff; border-radius: 8px; padding: 8px 12px; cursor: pointer; }
    .hero {
      position: relative;
      overflow: hidden;
      background:
        linear-gradient(135deg, rgba(219, 249, 244, .92), rgba(246, 251, 250, .98) 58%, rgba(229, 247, 247, .9)),
        repeating-linear-gradient(120deg, transparent 0 48px, rgba(11, 146, 144, .055) 49px 50px);
      padding: 92px 0 76px;
    }
    .hero:after {
      content: "";
      position: absolute;
      width: 380px;
      height: 380px;
      right: -120px;
      top: 40px;
      border: 1px solid rgba(11, 146, 144, .17);
      border-radius: 50%;
      box-shadow: 0 0 0 32px rgba(11, 146, 144, .035), 0 0 0 64px rgba(11, 146, 144, .025);
    }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
    .eyebrow { display: inline-flex; color: var(--teal-deep); font-weight: 700; letter-spacing: 1px; font-size: 14px; }
    h1, h2, h3 { margin: 0; line-height: 1.25; letter-spacing: 0; }
    h1 { margin-top: 16px; max-width: 680px; font-size: clamp(38px, 5vw, 64px); }
    .hero-copy { margin: 22px 0 28px; color: var(--muted); font-size: 18px; max-width: 650px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
    .secondary-btn { display: inline-flex; align-items: center; justify-content: center; border: 1px solid #9ddbd6; border-radius: 9px; padding: 11px 20px; color: var(--teal-deep); font-weight: 700; background: rgba(255,255,255,.7); }
    .secondary-btn:hover { background: #fff; }
    .hero-panel { border-left: 3px solid var(--cyan); padding: 14px 0 14px 24px; }
    .hero-panel h2 { font-size: 21px; margin-bottom: 16px; }
    .hero-panel p { margin: 0; color: var(--muted); }
    .signal-list { display: grid; gap: 12px; margin-top: 24px; }
    .signal-item { display: flex; align-items: center; gap: 12px; color: #28565d; font-weight: 700; }
    .signal-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 6px rgba(242, 141, 85, .13); }
    .metrics { margin-top: -22px; position: relative; z-index: 2; }
    .metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .metric { background: #fff; border: 1px solid var(--line); padding: 22px; border-radius: 12px; box-shadow: var(--shadow); }
    .metric strong { display: block; color: var(--teal-deep); font-size: 30px; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 14px; }
    section { padding: 88px 0; }
    .section-head { max-width: 700px; margin-bottom: 34px; }
    .section-kicker { display: block; color: var(--teal); font-weight: 800; font-size: 13px; letter-spacing: 1.5px; margin-bottom: 10px; }
    h2 { font-size: clamp(28px, 3vw, 42px); }
    .section-head p { color: var(--muted); margin: 14px 0 0; }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; align-items: stretch; }
    .intro-text, .quote-box { padding: 30px; border: 1px solid var(--line); background: #fff; border-radius: var(--radius); }
    .intro-text p { margin: 0 0 16px; color: var(--muted); }
    .quote-box { background: var(--teal-deep); color: #fff; display: flex; flex-direction: column; justify-content: center; }
    .quote-box p { font-size: 22px; margin: 0 0 18px; }
    .quote-box span { color: #bce8e3; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .service-card { background: #fff; border: 1px solid var(--line); padding: 24px; border-radius: 12px; transition: transform .25s, box-shadow .25s; }
    .service-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
    .service-card b { display: inline-flex; color: var(--teal-deep); margin-bottom: 8px; font-size: 18px; }
    .service-card p { color: var(--muted); margin: 0; font-size: 14px; }
    .service-wide { grid-column: span 2; }
    .pill-list, .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .pill, .tag { padding: 7px 12px; border: 1px solid #b7e4df; color: var(--teal-deep); background: var(--mint); border-radius: 999px; font-size: 13px; }
    .workflow { background: #eaf9f7; }
    .steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
    .step { position: relative; padding: 24px 18px; background: #fff; border-top: 3px solid var(--teal); border-radius: 10px; }
    .step-no { color: var(--orange); font-size: 28px; font-weight: 800; }
    .step h3 { font-size: 18px; margin: 10px 0 8px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .solution-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .solution { padding: 22px; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
    .solution h3 { font-size: 18px; margin-bottom: 8px; }
    .solution p { margin: 0; color: var(--muted); font-size: 14px; }
    .network { background: #123f46; color: #fff; }
    .network .section-head p { color: #b4d8d5; }
    .network .section-kicker { color: #62d5c9; }
    .network-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
    .network-panel { border: 1px solid rgba(167, 232, 224, .25); padding: 28px; border-radius: 14px; }
    .network-panel h3 { margin-bottom: 16px; font-size: 21px; }
    .network .tag { color: #d4fffa; background: rgba(79, 205, 194, .12); border-color: rgba(141, 230, 222, .35); }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; border-radius: 14px; box-shadow: var(--shadow); }
    table { width: 100%; border-collapse: collapse; min-width: 740px; }
    th, td { padding: 17px 20px; text-align: left; border-bottom: 1px solid var(--line); }
    th { color: var(--teal-deep); background: var(--mint); font-size: 14px; }
    td { color: var(--muted); font-size: 14px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .rating { display: flex; align-items: center; gap: 18px; margin-bottom: 22px; }
    .rating strong { font-size: 42px; color: var(--orange); }
    .stars { color: #ef9a35; letter-spacing: 4px; font-size: 22px; }
    .cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 14px; }
    .media-box { aspect-ratio: 16 / 9; overflow: hidden; background: #d9efed; }
    .media-box img { width: 100%; height: 100%; object-fit: cover; }
    .case-body { padding: 20px; }
    .case-body h3 { font-size: 19px; margin-bottom: 7px; }
    .case-body p { color: var(--muted); font-size: 14px; margin: 0; }
    .articles { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; }
    .article-feature { background: #fff; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
    .article-feature .media-box { aspect-ratio: 2 / 1; }
    .article-feature .case-body { padding: 24px; }
    .article-list { display: grid; gap: 10px; }
    .article-link { display: flex; justify-content: space-between; gap: 14px; padding: 16px 18px; background: #fff; border: 1px solid var(--line); border-radius: 9px; color: #315e65; }
    .article-link span:last-child { color: var(--teal); white-space: nowrap; }
    .comments { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .comment { padding: 23px; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
    .comment p { margin: 0 0 18px; color: #49686d; font-size: 14px; }
    .comment b { color: var(--teal-deep); font-size: 14px; }
    .tools-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 28px; align-items: start; }
    .price-box, .match-form { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 28px; }
    .price-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
    .price-row:last-child { border-bottom: 0; }
    .price-row span { color: var(--muted); }
    .price-row strong { color: var(--teal-deep); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    label { display: grid; gap: 6px; color: #46666c; font-size: 14px; font-weight: 700; }
    .full { grid-column: 1 / -1; }
    input, select, textarea { width: 100%; border: 1px solid #c9e3e0; border-radius: 8px; padding: 12px 13px; color: var(--ink); background: #fbfefd; outline: none; }
    input:focus, select:focus, textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(11, 146, 144, .1); }
    textarea { min-height: 120px; resize: vertical; }
    .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 22px; }
    details { background: #fff; border: 1px solid var(--line); border-radius: 9px; padding: 0 18px; }
    summary { cursor: pointer; padding: 17px 0; font-weight: 700; color: #295960; }
    details p { margin: 0 0 17px; color: var(--muted); font-size: 14px; }
    .join { background: linear-gradient(110deg, #dff8f3, #f8fcfb); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .join-grid { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 30px; }
    .join p { color: var(--muted); margin-bottom: 0; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 30px; align-items: center; }
    .contact-info { display: grid; gap: 13px; color: #4c6b70; }
    .contact-info strong { color: var(--ink); }
    .qr { width: 132px; border: 8px solid #fff; box-shadow: var(--shadow); border-radius: 8px; }
    .footer { background: #11383e; color: #d6eeeb; padding: 42px 0 24px; }
    .footer-grid { display: grid; grid-template-columns: 1.1fr .9fr .9fr; gap: 30px; }
    .footer h3 { color: #fff; font-size: 17px; margin-bottom: 14px; }
    .footer p { color: #acd1cd; margin: 0; font-size: 14px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; }
    .footer-links a { color: #acd1cd; font-size: 14px; }
    .footer-links a:hover { color: #fff; }
    .copyright { border-top: 1px solid rgba(207, 240, 235, .18); margin-top: 30px; padding-top: 18px; color: #9cc3bf; font-size: 13px; }
    .float-contact { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: flex; flex-direction: column; gap: 8px; }
    .float-contact a { display: flex; align-items: center; justify-content: center; min-width: 90px; padding: 9px 12px; background: var(--teal-deep); color: #fff; border-radius: 8px; box-shadow: 0 8px 22px rgba(0,0,0,.15); font-size: 13px; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
    .reveal.visible { opacity: 1; transform: none; }
    @media (max-width: 1020px) {
      .nav-links { display: none; position: absolute; top: 74px; left: 20px; right: 20px; padding: 12px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: 10px; }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 10px; }
      .menu-toggle { display: block; }
      .nav-cta { display: none; }
      .hero-grid, .intro-grid, .articles, .tools-grid, .contact-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: repeat(3, 1fr); }
      .solution-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      section { padding: 62px 0; }
      .hero { padding: 65px 0 58px; }
      h1 { font-size: 39px; }
      .metric-grid, .service-grid, .cases, .comments, .faq-grid, .footer-grid { grid-template-columns: 1fr; }
      .service-wide { grid-column: auto; }
      .steps, .solution-grid { grid-template-columns: 1fr; }
      .join-grid { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .full { grid-column: auto; }
      .float-contact { right: 10px; bottom: 10px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *:before, *:after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
      .reveal { opacity: 1; transform: none; }
    }