:root {
      --ink: #1d2433;
      --muted: #647084;
      --paper: #fffdf8;
      --white: #ffffff;
      --line: #e8e6df;
      --pink: #ff668c;
      --orange: #ff9d4d;
      --yellow: #ffd95a;
      --mint: #61d6bb;
      --blue: #75b8f5;
      --purple: #9c85e8;
      --soft-pink: #fff0f4;
      --soft-blue: #eef7ff;
      --soft-mint: #edfbf6;
      --shadow: 0 18px 45px rgba(41, 49, 73, .09);
      --radius: 20px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", 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(1180px, calc(100% - 40px));
      margin: 0 auto;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255,253,248,.94);
      border-bottom: 1px solid rgba(232,230,223,.85);
      backdrop-filter: blur(16px);
    }
    .nav-bar {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 19px;
      font-weight: 800;
      white-space: nowrap;
    }
    .ai-page-logo { width: 42px; max-height: 42px; object-fit: contain; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
      justify-content: flex-end;
    }
    .nav-links a {
      padding: 8px 10px;
      color: #4f596b;
      font-size: 13px;
      transition: color .2s ease, transform .2s ease;
    }
    .nav-links a:hover { color: var(--pink); transform: translateY(-1px); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 7px;
      border: 0;
      border-radius: 999px;
      padding: 12px 20px;
      color: #fff;
      background: var(--pink);
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 9px 20px rgba(255,102,140,.23);
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-cta { margin-left: 10px; padding: 10px 16px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 13px 26px rgba(255,102,140,.28); }
    .button.secondary { color: var(--ink); background: var(--yellow); box-shadow: none; }
    .button.outline { color: var(--ink); background: transparent; border: 1px solid #d9dce4; box-shadow: none; }
    .menu-toggle { display: none; border: 0; background: transparent; color: var(--ink); font-size: 25px; }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 84px 0 72px;
      background:
        linear-gradient(135deg, #fff9db 0%, #fff7f8 46%, #edf8ff 100%);
    }
    .hero:before, .hero:after {
      content: "";
      position: absolute;
      border-radius: 50%;
      pointer-events: none;
    }
    .hero:before { width: 220px; height: 220px; right: 6%; top: 35px; background: rgba(255,157,77,.22); }
    .hero:after { width: 170px; height: 170px; left: -55px; bottom: -55px; background: rgba(97,214,187,.28); }
    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1.08fr .92fr;
      gap: 55px;
      align-items: center;
    }
    .eyebrow, .section-kicker {
      color: #e2587c;
      font-size: 13px;
      font-weight: 800;
      letter-spacing: 1px;
      text-transform: uppercase;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      max-width: 650px;
      margin-bottom: 20px;
      font-size: clamp(36px, 5vw, 66px);
      line-height: 1.12;
      letter-spacing: 0;
    }
    .hero-copy {
      max-width: 650px;
      color: #556071;
      font-size: 18px;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin: 29px 0 28px; }
    .hero-note { color: #697386; font-size: 13px; }
    .hero-panel {
      position: relative;
      padding: 28px;
      border: 1px solid rgba(255,255,255,.8);
      border-radius: 28px;
      background: rgba(255,255,255,.72);
      box-shadow: var(--shadow);
      animation: floatIn .8s ease both;
    }
    .hero-panel h2 { margin-bottom: 20px; font-size: 22px; }
    .signal-list { display: grid; gap: 12px; }
    .signal {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 15px 16px;
      border-radius: 15px;
      background: #fff;
      border-left: 5px solid var(--mint);
    }
    .signal:nth-child(2) { border-color: var(--orange); }
    .signal:nth-child(3) { border-color: var(--purple); }
    .signal strong { font-size: 19px; }
    .signal span { color: var(--muted); font-size: 13px; }
    .section { padding: 86px 0; }
    .section-tint { background: #f8fbff; }
    .section-warm { background: #fff8f2; }
    .section-head { max-width: 700px; margin-bottom: 35px; }
    .section-head h2 { margin: 7px 0 10px; font-size: clamp(28px, 4vw, 43px); line-height: 1.2; }
    .section-head p { color: var(--muted); margin-bottom: 0; }
    .metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
      margin-top: -28px;
      position: relative;
      z-index: 2;
    }
    .metric {
      padding: 22px;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 16px;
      box-shadow: 0 10px 26px rgba(41,49,73,.06);
    }
    .metric strong { display: block; font-size: 30px; color: #e2587c; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 13px; }
    .intro-layout { display: grid; grid-template-columns: .88fr 1.12fr; gap: 45px; align-items: start; }
    .intro-panel { padding: 28px; border-radius: 22px; background: var(--soft-pink); border: 1px solid #ffd9e3; }
    .intro-panel h3 { font-size: 24px; margin-bottom: 12px; }
    .check-list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 12px; }
    .check-list li { position: relative; padding-left: 28px; }
    .check-list li:before { content: "✓"; position: absolute; left: 0; color: #e2587c; font-weight: 900; }
    .capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .capability {
      padding: 23px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 16px;
      transition: transform .25s ease, box-shadow .25s ease;
    }
    .capability:hover, .review:hover, .case:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
    .capability .icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; background: var(--yellow); font-weight: 900; margin-bottom: 15px; }
    .capability:nth-child(2) .icon { background: var(--mint); }
    .capability:nth-child(3) .icon { background: #ffc4d6; }
    .capability:nth-child(4) .icon { background: var(--blue); }
    .capability:nth-child(5) .icon { background: #d3c8ff; }
    .capability:nth-child(6) .icon { background: var(--orange); }
    .capability h3 { margin-bottom: 7px; font-size: 18px; }
    .capability p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .service {
      min-height: 160px;
      padding: 20px;
      background: #fff;
      border-radius: 14px;
      border-top: 4px solid var(--pink);
      box-shadow: 0 8px 24px rgba(41,49,73,.05);
    }
    .service:nth-child(4n+2) { border-color: var(--orange); }
    .service:nth-child(4n+3) { border-color: var(--mint); }
    .service:nth-child(4n+4) { border-color: var(--purple); }
    .service h3 { font-size: 17px; margin-bottom: 7px; }
    .service p { color: var(--muted); font-size: 13px; margin-bottom: 0; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
    .step { position: relative; padding: 25px 20px; background: #fff; border: 1px solid var(--line); border-radius: 16px; }
    .step:before { counter-increment: step; content: "0" counter(step); display: block; color: var(--pink); font-weight: 900; font-size: 24px; margin-bottom: 15px; }
    .step h3 { font-size: 18px; margin-bottom: 7px; }
    .step p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .industry { padding: 22px; border-radius: 18px; background: #fff3d7; }
    .industry:nth-child(2) { background: #eaf9f5; }
    .industry:nth-child(3) { background: #f2edff; }
    .industry:nth-child(4) { background: #eaf4ff; }
    .industry:nth-child(5) { background: #fff0f4; }
    .industry:nth-child(6) { background: #f4f5e8; }
    .industry h3 { font-size: 18px; margin-bottom: 8px; }
    .industry p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .tag { padding: 7px 13px; border-radius: 999px; background: #fff; border: 1px solid #e4e1d7; color: #536073; font-size: 13px; }
    .network { display: grid; grid-template-columns: .8fr 1.2fr; gap: 35px; align-items: center; }
    .network-box { padding: 30px; border-radius: 22px; background: linear-gradient(135deg, #eafaf6, #eef5ff); }
    .network-box strong { display: block; font-size: 35px; color: #318c84; }
    .network-box span { color: var(--muted); }
    .compare-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); border-radius: 18px; }
    table { width: 100%; min-width: 700px; border-collapse: collapse; }
    th, td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--line); }
    th { background: #fff3d7; font-size: 14px; }
    td { color: #596475; font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .rating { display: flex; align-items: end; gap: 20px; margin-bottom: 25px; }
    .rating strong { color: #ee7890; font-size: 54px; line-height: 1; }
    .stars { color: #f4aa25; font-size: 25px; letter-spacing: 0; }
    .cases { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .case { overflow: hidden; background: #fff; border-radius: 18px; border: 1px solid var(--line); transition: transform .25s ease, box-shadow .25s ease; }
    .case-media { padding: 12px; background: #f3f7fb; }
    .case-media img { width: 100%; aspect-ratio: 16/8; object-fit: contain; border-radius: 12px; }
    .case-content { padding: 20px; }
    .case-content h3 { margin-bottom: 7px; font-size: 20px; }
    .case-content p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .review { padding: 23px; background: #fff; border: 1px solid var(--line); border-radius: 16px; transition: transform .25s ease, box-shadow .25s ease; }
    .review p { color: #535f70; font-size: 14px; }
    .review footer { display: flex; justify-content: space-between; gap: 12px; color: #e2587c; font-size: 13px; font-weight: 700; }
    .article-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article { padding: 18px; min-height: 130px; background: #fff; border: 1px solid var(--line); border-radius: 14px; }
    .article span { color: #e2587c; font-size: 12px; font-weight: 800; }
    .article h3 { margin: 9px 0 0; font-size: 15px; line-height: 1.5; }
    .form-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 35px; }
    .contact-card { padding: 28px; border-radius: 22px; background: #253047; color: #fff; }
    .contact-card p { color: #dbe2ef; }
    .contact-list { display: grid; gap: 12px; margin-top: 24px; }
    .contact-list span { display: block; color: #ffd95a; font-size: 13px; }
    .contact-list strong { font-size: 16px; }
    .form-box { padding: 28px; background: #fff; border: 1px solid var(--line); border-radius: 20px; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    label { display: grid; gap: 6px; color: #495568; font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; padding: 12px 13px; border: 1px solid #dfe2e8; border-radius: 10px; color: var(--ink); background: #fff; outline: none; }
    textarea { min-height: 126px; resize: vertical; }
    input:focus, select:focus, textarea:focus { border-color: var(--pink); box-shadow: 0 0 0 3px rgba(255,102,140,.12); }
    .full { grid-column: 1 / -1; }
    .faq-list { display: grid; gap: 10px; max-width: 900px; }
    details { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 17px 19px; }
    summary { cursor: pointer; font-weight: 700; padding-right: 15px; }
    details p { color: var(--muted); margin: 12px 0 0; font-size: 14px; }
    .footer {
      background: #20283a;
      color: #f8fbff;
      padding: 48px 0 25px;
    }
    .footer-grid { display: grid; grid-template-columns: 1.1fr .9fr .9fr; gap: 30px; }
    .footer h2, .footer h3 { color: #fff; margin-bottom: 12px; }
    .footer p, .footer a { color: #c8d1df; font-size: 14px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 15px; }
    .footer-bottom { margin-top: 30px; padding-top: 16px; border-top: 1px solid #3a4559; color: #aeb8c7; font-size: 12px; }
    .qr { width: 110px; border-radius: 10px; margin-top: 12px; }
    .float-contact, .back-top {
      position: fixed;
      right: 20px;
      z-index: 15;
      border: 0;
      cursor: pointer;
      box-shadow: 0 10px 25px rgba(33,40,60,.18);
    }
    .float-contact { bottom: 78px; padding: 12px 16px; border-radius: 999px; color: #fff; background: var(--pink); font-weight: 700; }
    .back-top { bottom: 20px; width: 40px; height: 40px; border-radius: 50%; color: var(--ink); background: var(--yellow); display: none; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes floatIn { 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: #fffdf8; border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 10px; }
      .nav-cta { margin: 0; }
      .menu-toggle { display: block; }
      .hero-grid, .intro-layout, .network, .form-layout { grid-template-columns: 1fr; }
      .metrics { grid-template-columns: repeat(2, 1fr); }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .article-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 640px) {
      .container { width: min(100% - 28px, 1180px); }
      .hero { padding: 60px 0 62px; }
      .section { padding: 62px 0; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 16px; }
      .metrics, .capability-grid, .industry-grid, .steps, .reviews, .cases, .footer-grid { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: 1fr; }
      .article-grid { grid-template-columns: 1fr 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .full { grid-column: auto; }
      .rating { align-items: start; flex-direction: column; gap: 8px; }
      .float-contact { right: 14px; }
    }