:root {
      --red: #d92d3f;
      --red-dark: #a91f31;
      --red-soft: #fff0f1;
      --ink: #211d20;
      --muted: #6d6468;
      --line: #eadcdf;
      --cream: #fffaf7;
      --white: #ffffff;
      --gold: #c88a28;
      --green: #14785c;
      --shadow: 0 18px 45px rgba(70, 25, 32, .1);
      --radius: 14px;
      --container: 1180px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--cream);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font: inherit; }
    .container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
    .topbar {
      background: var(--ink);
      color: #fff8f5;
      font-size: 13px;
    }
    .topbar-inner {
      min-height: 34px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }
    .topbar a { color: #ffd9dc; }
    header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255, 250, 247, .96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .nav-wrap {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      min-width: 190px;
    }
    .ai-page-logo { width: 148px; }
    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 0;
      flex-wrap: wrap;
      color: #41383c;
      font-size: 14px;
    }
    .nav-links a {
      padding: 8px 10px;
      border-bottom: 2px solid transparent;
      transition: .2s ease;
    }
    .nav-links a:hover, .nav-links a:focus { color: var(--red); border-color: var(--red); }
    .nav-cta, .primary-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: 0;
      background: var(--red);
      color: #fff;
      padding: 12px 19px;
      border-radius: 8px;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 8px 18px rgba(217,45,63,.18);
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta:hover, .primary-btn:hover { background: var(--red-dark); transform: translateY(-2px); box-shadow: 0 12px 24px rgba(217,45,63,.25); }
    .menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--line);
      color: var(--ink);
      padding: 8px 11px;
      border-radius: 7px;
      cursor: pointer;
    }
    .hero {
      position: relative;
      overflow: hidden;
      background: var(--red);
      color: #fff;
      padding: 88px 0 76px;
    }
    .hero:before, .hero:after {
      content: "";
      position: absolute;
      border: 1px solid rgba(255,255,255,.2);
      transform: rotate(18deg);
      pointer-events: none;
    }
    .hero:before { width: 320px; height: 320px; right: -90px; top: -120px; border-radius: 42px; }
    .hero:after { width: 190px; height: 190px; left: -70px; bottom: -90px; border-radius: 50%; }
    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1.15fr .85fr;
      gap: 58px;
      align-items: center;
    }
    .eyebrow {
      margin: 0 0 14px;
      color: #ffd5d8;
      font-size: 13px;
      font-weight: 800;
      letter-spacing: 1.5px;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      max-width: 680px;
      margin-bottom: 20px;
      font-size: clamp(36px, 5vw, 66px);
      line-height: 1.1;
      letter-spacing: 0;
    }
    .hero-copy {
      max-width: 640px;
      color: #fff2f1;
      font-size: 18px;
    }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
    .hero .primary-btn { background: #fff; color: var(--red-dark); }
    .hero .primary-btn:hover { background: #fff0f1; }
    .text-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 11px 18px;
      border: 1px solid rgba(255,255,255,.65);
      border-radius: 8px;
      color: #fff;
      font-weight: 700;
    }
    .hero-panel {
      border-left: 1px solid rgba(255,255,255,.35);
      padding-left: 30px;
    }
    .hero-panel h2 { font-size: 22px; margin-bottom: 18px; }
    .signal-list { display: grid; gap: 14px; }
    .signal {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 15px 0;
      border-bottom: 1px solid rgba(255,255,255,.2);
    }
    .signal strong { display: block; font-size: 18px; }
    .signal span { color: #ffe3e4; font-size: 13px; }
    .signal-mark {
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: #fff;
      color: var(--red);
      font-weight: 800;
      flex: 0 0 28px;
    }
    .section { padding: 86px 0; }
    .section.alt { background: #fff; }
    .section-head { max-width: 720px; margin-bottom: 38px; }
    .section-kicker { color: var(--red); font-size: 13px; font-weight: 800; letter-spacing: 1.2px; margin-bottom: 10px; }
    h2 { font-size: clamp(28px, 4vw, 44px); line-height: 1.2; margin-bottom: 14px; letter-spacing: 0; }
    h3 { font-size: 20px; line-height: 1.35; margin-bottom: 10px; }
    .lead { color: var(--muted); font-size: 17px; }
    .metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1px;
      background: var(--line);
      border: 1px solid var(--line);
      margin-top: -1px;
    }
    .metric { background: #fff; padding: 27px 24px; }
    .metric strong { display: block; color: var(--red); font-size: 33px; line-height: 1; margin-bottom: 9px; }
    .metric span { color: var(--muted); font-size: 14px; }
    .about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 54px; align-items: start; }
    .about-note {
      border-left: 4px solid var(--red);
      padding: 8px 0 8px 22px;
      font-size: 20px;
      font-weight: 700;
    }
    .check-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px 24px; padding: 0; margin: 24px 0 0; list-style: none; }
    .check-list li { position: relative; padding-left: 25px; color: #4e4549; }
    .check-list li:before { content: "✓"; position: absolute; left: 0; color: var(--red); font-weight: 800; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .service-card, .comment-card, .case-card, .article-card, .contact-card {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: 0 6px 20px rgba(70,25,32,.04);
    }
    .service-card { padding: 24px; transition: transform .2s ease, box-shadow .2s ease; }
    .service-card:hover, .comment-card:hover, .case-card:hover, .article-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
    .service-no { color: var(--red); font-weight: 800; font-size: 13px; }
    .service-card p, .case-card p, .article-card p, .comment-card p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .tag-list { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
    .tag { padding: 7px 11px; border: 1px solid #f0c7cc; border-radius: 999px; background: var(--red-soft); color: #8e2735; font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border-top: 2px solid var(--red); }
    .step { position: relative; padding: 28px 18px 10px; border-right: 1px solid var(--line); }
    .step:last-child { border-right: 0; }
    .step-number { position: absolute; top: -18px; left: 18px; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--red); color: #fff; font-weight: 800; }
    .step p { color: var(--muted); font-size: 14px; }
    .media-strip { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; margin-top: 30px; }
    .media-strip img, .case-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 10px; }
    .media-stack { display: grid; gap: 18px; }
    .media-stack img { aspect-ratio: 16 / 9; object-fit: cover; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .solution { border-top: 4px solid var(--red); padding: 24px; background: #fff7f5; }
    .solution p { color: var(--muted); font-size: 14px; }
    .network {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 28px;
      align-items: stretch;
    }
    .network-main { background: var(--ink); color: #fff; padding: 34px; border-radius: var(--radius); }
    .network-main p { color: #e6dadd; }
    .network-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 22px; }
    .network-points div { padding: 14px; border: 1px solid rgba(255,255,255,.18); color: #ffe8e9; }
    .network-side { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .network-side div { padding: 22px; border: 1px solid var(--line); background: #fff; border-radius: 10px; }
    .network-side strong { color: var(--red); display: block; font-size: 25px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 720px; border-collapse: collapse; }
    th, td { padding: 17px 18px; text-align: left; border-bottom: 1px solid var(--line); }
    th { background: var(--ink); color: #fff; font-size: 14px; }
    td:first-child { font-weight: 700; }
    .good { color: var(--green); font-weight: 700; }
    .rating {
      display: flex;
      gap: 25px;
      align-items: center;
      padding: 24px;
      margin-bottom: 24px;
      background: var(--red-soft);
      border: 1px solid #f0c7cc;
      border-radius: var(--radius);
    }
    .stars { color: var(--gold); font-size: 25px; letter-spacing: 2px; }
    .rating strong { font-size: 34px; color: var(--red); }
    .cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case-card { overflow: hidden; }
    .case-card-body { padding: 20px; }
    .case-card small, .article-card small { color: var(--red); font-weight: 700; }
    .comments { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .comment-card { padding: 23px; }
    .comment-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
    .comment-head strong { font-size: 15px; }
    .comment-head span { color: var(--gold); font-size: 14px; }
    .articles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 13px; }
    .article-card { padding: 18px; min-height: 150px; }
    .article-card h3 { font-size: 16px; margin-top: 12px; }
    .match-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; align-items: start; }
    .match-info { padding: 28px; background: var(--red); color: #fff; border-radius: var(--radius); }
    .match-info p { color: #ffe6e7; }
    form { display: grid; gap: 14px; }
    .form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
    label { display: grid; gap: 6px; color: #4b4246; font-size: 14px; font-weight: 700; }
    input, select, textarea { width: 100%; padding: 12px 13px; border: 1px solid #decdd1; border-radius: 8px; background: #fff; color: var(--ink); outline: none; }
    input:focus, select:focus, textarea:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(217,45,63,.1); }
    textarea { min-height: 120px; resize: vertical; }
    .form-card { padding: 28px; border: 1px solid var(--line); background: #fff; border-radius: var(--radius); }
    .faq-list { display: grid; gap: 10px; max-width: 900px; }
    details { background: #fff; border: 1px solid var(--line); border-radius: 9px; padding: 18px 20px; }
    summary { cursor: pointer; font-weight: 700; padding-right: 18px; }
    details p { color: var(--muted); margin: 12px 0 0; font-size: 14px; }
    .join {
      display: grid;
      grid-template-columns: 1fr auto;
      align-items: center;
      gap: 24px;
      padding: 34px;
      background: #fff;
      border: 1px solid var(--line);
      border-left: 6px solid var(--red);
    }
    .join p { color: var(--muted); margin-bottom: 0; }
    footer { background: var(--ink); color: #fff4f1; padding: 50px 0 22px; }
    .footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .9fr 1fr; gap: 30px; }
    footer h3 { color: #fff; font-size: 17px; }
    footer p, footer li, footer a { color: #d8c8cb; font-size: 14px; }
    footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 7px; }
    .qr { width: 110px; border-radius: 8px; background: #fff; padding: 5px; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid rgba(255,255,255,.15); padding-top: 18px; margin-top: 35px; color: #bfaeb2; font-size: 13px; }
    .float-contact, .back-top { position: fixed; right: 20px; z-index: 15; border: 0; cursor: pointer; box-shadow: var(--shadow); }
    .float-contact { bottom: 76px; width: 52px; height: 52px; border-radius: 50%; background: var(--red); color: #fff; font-size: 13px; font-weight: 700; }
    .back-top { display: none; bottom: 18px; width: 38px; height: 38px; border-radius: 8px; background: var(--ink); color: #fff; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 1050px) {
      .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 12px 20px 20px; background: var(--cream); border-bottom: 1px solid var(--line); }
      .nav-links.open { display: grid; grid-template-columns: repeat(3, 1fr); }
      .menu-toggle { display: block; }
      .nav-cta { display: none; }
      .hero-grid, .about-grid, .network, .match-grid { grid-template-columns: 1fr; }
      .hero-panel { border-left: 0; border-top: 1px solid rgba(255,255,255,.35); padding: 28px 0 0; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .articles { grid-template-columns: repeat(3, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      .topbar-inner { padding: 7px 0; align-items: flex-start; flex-direction: column; gap: 2px; }
      .nav-wrap { min-height: 66px; }
      .nav-links { top: 66px; }
      .nav-links.open { grid-template-columns: repeat(2, 1fr); }
      .hero { padding: 62px 0 55px; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 16px; }
      .section { padding: 60px 0; }
      .metrics, .service-grid, .solution-grid, .cases, .comments, .footer-grid { grid-template-columns: 1fr; }
      .check-list, .network-points, .network-side, .form-grid { grid-template-columns: 1fr; }
      .workflow { display: grid; grid-template-columns: 1fr; border-top: 0; gap: 16px; }
      .step { border-right: 0; border-left: 2px solid var(--red); padding: 6px 10px 6px 25px; }
      .step-number { left: -18px; top: 6px; }
      .media-strip { grid-template-columns: 1fr; }
      .articles { grid-template-columns: 1fr 1fr; }
      .rating { align-items: flex-start; flex-direction: column; gap: 8px; }
      .join { grid-template-columns: 1fr; padding: 25px; }
      .footer-bottom { flex-direction: column; }
    }