:root {
      --pink: #e83278;
      --pink-deep: #b8175a;
      --rose: #fff0f5;
      --ink: #241b27;
      --muted: #685d69;
      --line: #eadde5;
      --paper: #fffafc;
      --white: #fff;
      --shadow: 0 16px 42px rgba(151, 38, 90, .12);
      --radius: 18px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "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; }
    .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255,250,252,.94);
      border-bottom: 1px solid rgba(234,221,229,.8);
      backdrop-filter: blur(14px);
    }
    .nav {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .brand { display: flex; align-items: center; flex-shrink: 0; }
    .ai-page-logo { width: 142px; }
    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 8px 10px;
      color: #514651;
      font-size: 13px;
      transition: color .2s ease;
    }
    .nav-links a:hover { color: var(--pink); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: 0;
      border-radius: 999px;
      padding: 12px 22px;
      background: var(--pink);
      color: #fff;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 9px 22px rgba(232,50,120,.2);
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta { padding: 10px 17px; font-size: 13px; white-space: nowrap; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); background: var(--pink-deep); box-shadow: 0 12px 26px rgba(232,50,120,.28); }
    .button.secondary { background: #fff; color: var(--pink-deep); border: 1px solid #f0b9cf; box-shadow: none; }
    .menu-toggle { display: none; background: none; border: 0; font-size: 25px; color: var(--pink-deep); }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 92px 0 76px;
      background:
        linear-gradient(135deg, #fff7fa 0%, #ffe8f1 52%, #fff 100%);
    }
    .hero:after {
      content: "";
      position: absolute;
      width: 460px;
      height: 460px;
      right: -190px;
      top: -170px;
      border: 70px solid rgba(232,50,120,.09);
      border-radius: 50%;
    }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.15fr .85fr; gap: 60px; align-items: center; }
    .eyebrow, .section-kicker {
      color: var(--pink-deep);
      font-weight: 800;
      letter-spacing: 2px;
      font-size: 13px;
      text-transform: uppercase;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 680px; margin-bottom: 22px; font-size: clamp(38px, 6vw, 72px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 650px; color: var(--muted); font-size: 18px; }
    .hero-actions { display: flex; gap: 13px; flex-wrap: wrap; margin: 30px 0 34px; }
    .signal-list { display: flex; flex-wrap: wrap; gap: 12px; }
    .signal-list span { padding: 8px 13px; border: 1px solid #f1bfd3; background: rgba(255,255,255,.68); border-radius: 999px; color: #713149; font-size: 13px; }
    .hero-panel {
      padding: 28px;
      background: #261b29;
      color: white;
      border-radius: 26px;
      box-shadow: 18px 22px 0 rgba(232,50,120,.15);
      animation: rise .7s ease both;
    }
    .hero-panel h2 { font-size: 24px; margin-bottom: 18px; }
    .hero-panel p { color: #e8dbe4; font-size: 14px; }
    .mini-metric { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 22px; }
    .mini-metric div { padding: 16px; border: 1px solid #594653; border-radius: 13px; }
    .mini-metric strong { display: block; color: #ff7eaa; font-size: 25px; }
    section { padding: 82px 0; }
    .section-head { max-width: 700px; margin-bottom: 35px; }
    .section-head h2 { margin: 8px 0 12px; font-size: clamp(28px, 4vw, 44px); line-height: 1.2; }
    .section-head p { color: var(--muted); }
    .band { background: #fff; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: -28px; position: relative; z-index: 2; }
    .metric { padding: 24px; background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--pink); box-shadow: var(--shadow); }
    .metric strong { display: block; color: var(--pink-deep); font-size: 31px; }
    .metric span { color: var(--muted); font-size: 14px; }
    .about-grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 50px; align-items: start; }
    .about-note { border-left: 4px solid var(--pink); padding: 10px 0 10px 25px; font-size: 20px; }
    .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .feature { padding: 25px; border: 1px solid var(--line); background: #fff; border-radius: var(--radius); transition: transform .25s ease, box-shadow .25s ease; }
    .feature:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
    .feature .icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 12px; background: var(--rose); color: var(--pink-deep); font-weight: 800; margin-bottom: 15px; }
    .feature h3 { margin-bottom: 8px; font-size: 18px; }
    .feature p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
    .service-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px; }
    .service-tabs span, .tag { display: inline-block; padding: 7px 12px; background: var(--rose); border-radius: 999px; color: var(--pink-deep); font-size: 13px; }
    .service-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; }
    .service-item { padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
    .service-item strong { display: block; margin-bottom: 4px; }
    .service-item small { color: var(--muted); }
    .process { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; }
    .step { position: relative; padding: 20px 18px; border-top: 2px solid #efb1c9; }
    .step:not(:last-child):after { content: "→"; position: absolute; right: -9px; top: 7px; color: var(--pink); font-size: 25px; }
    .step b { display: block; color: var(--pink); font-size: 25px; margin-bottom: 8px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .solution { padding: 26px; background: #2b1d2d; color: #fff; border-radius: 18px; }
    .solution h3 { color: #ff8eb3; }
    .solution p { color: #eadde5; font-size: 14px; margin-bottom: 0; }
    .network { display: flex; flex-wrap: wrap; gap: 9px; }
    .network span { padding: 9px 14px; background: #fff; border: 1px solid var(--line); border-radius: 8px; color: #4b3d49; font-size: 14px; }
    .table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; min-width: 760px; border-collapse: collapse; }
    th, td { padding: 17px; text-align: left; border-bottom: 1px solid var(--line); }
    th { background: #fff1f6; color: var(--pink-deep); }
    td:first-child { font-weight: 700; }
    .score { display: flex; align-items: center; gap: 15px; margin-bottom: 25px; }
    .score strong { font-size: 45px; color: var(--pink-deep); }
    .stars { color: #e83278; letter-spacing: 3px; font-size: 22px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 16px; }
    .case-media { aspect-ratio: 16 / 9; overflow: hidden; background: #f6dce7; }
    .case-media img { width: 100%; height: 100%; object-fit: cover; }
    .case-content { padding: 19px; }
    .case-content h3 { margin-bottom: 7px; }
    .case-content p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .review { padding: 24px; background: #fff; border: 1px solid var(--line); border-radius: 15px; }
    .review p { color: #4d414c; }
    .review footer { color: var(--pink-deep); font-size: 13px; font-weight: 700; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-list a { padding: 18px; background: #fff; border-bottom: 3px solid #f2b4cb; color: #503f4b; font-size: 14px; }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; }
    details { background: #fff; border: 1px solid var(--line); padding: 17px 19px; }
    summary { cursor: pointer; font-weight: 700; color: #3b2b38; }
    details p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 45px; align-items: start; }
    .contact-box { padding: 28px; background: #2b1d2d; color: #fff; border-radius: 20px; }
    .contact-box p { color: #eadde5; }
    .contact-line { padding: 12px 0; border-bottom: 1px solid #584453; }
    form { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    label { display: grid; gap: 7px; color: #4b3b47; font-size: 14px; font-weight: 700; }
    input, select, textarea { width: 100%; border: 1px solid #dfccd7; border-radius: 8px; padding: 13px 14px; color: var(--ink); background: #fff; font: inherit; }
    textarea { min-height: 130px; resize: vertical; }
    .full { grid-column: 1 / -1; }
    .footer { padding: 42px 0 25px; background: #251a27; color: #fff; }
    .footer-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 30px; }
    .footer h3 { color: #ff8eb3; font-size: 16px; }
    .footer p, .footer a { color: #d8cbd5; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 10px 18px; }
    .copyright { margin-top: 30px; padding-top: 17px; border-top: 1px solid #4c3b4a; color: #a99aa7; font-size: 12px; }
    .float-service { position: fixed; right: 20px; bottom: 22px; z-index: 15; display: grid; place-items: center; width: 54px; height: 54px; border-radius: 50%; background: var(--pink); color: white; box-shadow: 0 8px 25px rgba(232,50,120,.35); font-size: 22px; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes rise { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; left: 20px; right: 20px; top: 70px; padding: 12px; background: #fff; box-shadow: var(--shadow); border: 1px solid var(--line); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 11px; }
      .menu-toggle { display: block; }
      .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
      .metrics, .service-list { grid-template-columns: repeat(2, 1fr); }
      .process { grid-template-columns: repeat(3, 1fr); }
      .step:nth-child(3):after { display: none; }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(100% - 28px, 1180px); }
      section { padding: 58px 0; }
      .hero { padding: 65px 0 58px; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 16px; }
      .metrics, .feature-grid, .service-list, .solution-grid, .case-grid, .reviews, .faq-list, .footer-grid { grid-template-columns: 1fr; }
      .process { grid-template-columns: 1fr; }
      .step:not(:last-child):after { content: "↓"; right: auto; left: 18px; top: auto; bottom: -18px; z-index: 1; }
      .step { padding-left: 0; }
      .article-list { grid-template-columns: 1fr 1fr; }
      form { grid-template-columns: 1fr; }
      .full { grid-column: auto; }
      .nav-cta { display: none; }
    }