:root {
      --ink: #17233b;
      --muted: #60708d;
      --paper: #fffdf8;
      --blue: #4263eb;
      --cyan: #25a9c8;
      --yellow: #f5c84c;
      --coral: #ef765f;
      --mint: #dff4e8;
      --line: #dce3ed;
      --white: #ffffff;
      --shadow: 0 18px 45px rgba(38, 61, 102, .11);
      --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; }
    button, input, select, textarea { font: inherit; }
    .container {
      width: min(1160px, calc(100% - 36px));
      margin: 0 auto;
    }
    .section { padding: 92px 0; position: relative; }
    .section.soft { background: #f3f8f4; }
    .section.blue { background: #eaf1ff; }
    .section.cream { background: #fff6dc; }
    .section-head { max-width: 720px; margin-bottom: 42px; }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      margin-bottom: 13px;
      color: var(--coral);
      font-size: .82rem;
      font-weight: 800;
      letter-spacing: 0;
      text-transform: uppercase;
    }
    .eyebrow::before {
      content: "";
      width: 27px;
      height: 8px;
      border-radius: 80% 20% 70% 30%;
      background: var(--yellow);
      transform: rotate(-5deg);
    }
    h1, h2, h3, p { margin-top: 0; }
    h1, h2, h3 { line-height: 1.2; }
    h1 { font-size: clamp(2.25rem, 5vw, 4.6rem); letter-spacing: 0; margin-bottom: 22px; }
    h2 { font-size: clamp(1.9rem, 4vw, 3rem); margin-bottom: 16px; }
    h3 { font-size: 1.18rem; margin-bottom: 9px; }
    .lead { color: var(--muted); font-size: 1.08rem; max-width: 650px; }
    .topbar {
      background: var(--ink);
      color: #fff;
      font-size: .82rem;
      padding: 8px 0;
    }
    .topbar-inner { display: flex; justify-content: space-between; gap: 18px; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255,253,248,.96);
      border-bottom: 1px solid rgba(220,227,237,.8);
      backdrop-filter: blur(12px);
    }
    .nav {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      flex: 0 0 auto;
    }
    .ai-page-logo { width: 142px; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
      justify-content: flex-end;
    }
    .nav-links a {
      color: #42516e;
      font-size: .88rem;
      padding: 9px 10px;
      transition: color .2s ease, transform .2s ease;
    }
    .nav-links a:hover { color: var(--blue); transform: translateY(-2px); }
    .nav-cta, .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: 0;
      border-radius: 10px;
      padding: 12px 18px;
      font-weight: 800;
      cursor: pointer;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .btn:hover, .nav-cta:hover { transform: translateY(-3px); box-shadow: 0 10px 22px rgba(66,99,235,.2); }
    .btn-primary, .nav-cta { background: var(--blue); color: #fff; }
    .btn-light { background: #fff; color: var(--blue); border: 1px solid var(--line); }
    .btn-coral { background: var(--coral); color: #fff; }
    .menu-toggle { display: none; border: 0; background: none; color: var(--ink); font-size: 1.45rem; cursor: pointer; }

    .hero {
      position: relative;
      overflow: hidden;
      padding: 92px 0 78px;
      background: #fff4cf;
    }
    .hero::before, .hero::after {
      content: "";
      position: absolute;
      pointer-events: none;
      border: 4px solid var(--coral);
      opacity: .55;
      border-radius: 48% 52% 40% 60%;
      transform: rotate(-18deg);
    }
    .hero::before { width: 180px; height: 90px; right: 4%; top: 42px; }
    .hero::after { width: 96px; height: 96px; left: 4%; bottom: 40px; border-color: var(--blue); border-radius: 50%; }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.08fr .92fr;
      gap: 60px;
      align-items: center;
      position: relative;
      z-index: 1;
    }
    .hero-copy { max-width: 720px; }
    .hero-copy h1 span { color: var(--blue); }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin: 30px 0; }
    .hero-note { color: #53617a; font-size: .92rem; }
    .hero-panel {
      background: #fff;
      border: 2px solid var(--ink);
      border-radius: 24px 14px 28px 18px;
      padding: 26px;
      box-shadow: 12px 12px 0 var(--yellow);
      transform: rotate(1deg);
    }
    .hero-panel h3 { font-size: 1.45rem; }
    .metric-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 20px; }
    .metric {
      padding: 16px;
      background: #f5f8ff;
      border-radius: 12px;
      border-left: 5px solid var(--blue);
    }
    .metric strong { display: block; font-size: 1.55rem; color: var(--blue); }
    .metric small { color: var(--muted); }
    .hero-strip {
      margin-top: 65px;
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }
    .pill {
      display: inline-flex;
      padding: 7px 13px;
      border-radius: 30px;
      color: #31405d;
      background: #fff;
      border: 1px solid #eadfae;
      font-size: .85rem;
    }

    .intro-grid, .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
    .feature-list { display: grid; gap: 12px; margin: 25px 0 0; padding: 0; list-style: none; }
    .feature-list li { padding: 15px 18px; background: #fff; border-left: 5px solid var(--cyan); border-radius: 10px; box-shadow: 0 8px 20px rgba(38,61,102,.05); }
    .feature-list strong { display: block; margin-bottom: 3px; }
    .sticker {
      padding: 28px;
      background: var(--mint);
      border: 2px dashed #4ba784;
      border-radius: 22px 10px 22px 12px;
      transform: rotate(-1.5deg);
    }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .service-card {
      background: #fff;
      padding: 22px;
      border: 1px solid var(--line);
      border-radius: 15px;
      box-shadow: 0 8px 22px rgba(38,61,102,.05);
      transition: transform .22s ease, box-shadow .22s ease;
    }
    .service-card:hover { transform: translateY(-7px) rotate(-.5deg); box-shadow: var(--shadow); }
    .service-icon {
      display: grid;
      place-items: center;
      width: 42px;
      height: 42px;
      margin-bottom: 16px;
      background: var(--yellow);
      border-radius: 50% 44% 53% 40%;
      font-weight: 900;
      color: var(--ink);
    }
    .service-card p, .case-card p, .comment p { color: var(--muted); font-size: .92rem; }
    .process { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; }
    .process-step { position: relative; padding: 20px 17px 20px 0; }
    .process-step:not(:last-child)::after {
      content: "→";
      position: absolute;
      right: 8px;
      top: 24px;
      color: var(--coral);
      font-size: 1.6rem;
      font-weight: 900;
    }
    .step-no { color: var(--coral); font-size: 2rem; font-weight: 900; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; }
    .solution {
      padding: 24px;
      background: #fff;
      border-radius: 13px;
      border-top: 6px solid var(--blue);
    }
    .solution:nth-child(2) { border-color: var(--coral); }
    .solution:nth-child(3) { border-color: var(--cyan); }
    .solution ul { padding-left: 20px; margin-bottom: 0; color: var(--muted); }
    .network {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      padding: 26px;
      background: #fff;
      border-radius: 19px;
      border: 1px solid var(--line);
    }
    .network span { padding: 9px 14px; border-radius: 8px; background: #edf2ff; color: #334b9b; font-size: .9rem; }
    .timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
    .timeline-item { padding: 22px; background: #fff; border-bottom: 5px solid var(--yellow); border-radius: 12px; }
    .timeline-item strong { display: block; color: var(--blue); margin-bottom: 8px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case-card { overflow: hidden; background: #fff; border-radius: 15px; border: 1px solid var(--line); }
    .case-card figure { margin: 0; aspect-ratio: 16 / 9; overflow: hidden; background: #eaf1ff; }
    .case-card figure img { width: 100%; height: 100%; object-fit: cover; }
    .case-body { padding: 20px; }
    .compare-wrap { overflow-x: auto; background: #fff; border-radius: 16px; box-shadow: var(--shadow); }
    table { width: 100%; min-width: 720px; border-collapse: collapse; }
    th, td { text-align: left; padding: 16px 18px; border-bottom: 1px solid var(--line); }
    th { background: var(--ink); color: #fff; }
    td:first-child { font-weight: 800; color: var(--ink); }
    .rating {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 20px;
      margin-bottom: 22px;
      padding: 24px;
      background: #fff1b8;
      border-radius: 15px;
    }
    .stars { color: #d89200; font-size: 1.55rem; letter-spacing: 3px; }
    .rating-score strong { color: var(--coral); font-size: 2.4rem; }
    .price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .price-card { background: #fff; padding: 25px; border-radius: 16px; border: 1px solid var(--line); }
    .price-card.featured { border: 3px solid var(--blue); transform: translateY(-7px); }
    .price-card .price { font-size: 2rem; color: var(--blue); font-weight: 900; margin: 14px 0; }
    .price-card ul { padding-left: 20px; color: var(--muted); }
    .comment-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; }
    .comment { background: #fff; padding: 22px; border-radius: 14px; border: 1px solid var(--line); }
    .comment cite { color: var(--blue); font-style: normal; font-weight: 800; font-size: .9rem; }
    .faq-list { display: grid; gap: 10px; max-width: 900px; }
    details { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; }
    summary { cursor: pointer; font-weight: 800; padding-right: 18px; }
    details p { color: var(--muted); margin: 12px 0 0; }
    .articles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-link { padding: 17px; background: #fff; border-radius: 10px; border: 1px solid var(--line); font-weight: 700; }
    .article-link:hover { color: var(--blue); border-color: var(--blue); }
    .contact-form {
      padding: 28px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 18px;
      box-shadow: var(--shadow);
    }
    .form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .field { display: grid; gap: 7px; }
    .field.full { grid-column: 1 / -1; }
    label { font-weight: 800; font-size: .9rem; }
    input, select, textarea { width: 100%; border: 1px solid #ccd5e2; border-radius: 8px; padding: 12px 13px; color: var(--ink); background: #fbfcff; outline: none; }
    textarea { min-height: 120px; resize: vertical; }
    input:focus, select:focus, textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(66,99,235,.1); }
    .contact-info { display: grid; gap: 16px; }
    .contact-item { padding: 20px; background: #fff; border-left: 5px solid var(--coral); border-radius: 10px; }
    .qr { width: 130px; margin-top: 12px; border-radius: 8px; }
    .footer {
      padding: 48px 0 22px;
      background: var(--ink);
      color: #eaf0ff;
    }
    .footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 36px; }
    .footer h3 { color: #fff; }
    .footer p, .footer a { color: #b9c8e5; font-size: .9rem; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 10px 18px; }
    .copyright { border-top: 1px solid rgba(255,255,255,.15); margin-top: 32px; padding-top: 17px; color: #9eabc4; font-size: .82rem; }
    .float-contact {
      position: fixed;
      right: 20px;
      bottom: 20px;
      z-index: 15;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 13px 16px;
      color: #fff;
      background: var(--coral);
      border-radius: 30px;
      box-shadow: 0 10px 25px rgba(239,118,95,.3);
      font-weight: 800;
    }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 14px 18px 20px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 11px 6px; }
      .menu-toggle { display: block; }
      .nav-cta { display: none; }
      .hero-grid, .intro-grid, .contact-grid { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .process { grid-template-columns: repeat(2, 1fr); }
      .process-step:not(:last-child)::after { display: none; }
      .articles { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 650px) {
      .container { width: min(100% - 28px, 1160px); }
      .section { padding: 68px 0; }
      .topbar-inner { display: block; text-align: center; }
      .hero { padding: 68px 0 55px; }
      .hero-panel { padding: 20px; }
      .service-grid, .solution-grid, .case-grid, .comment-grid, .price-grid, .timeline, .footer-grid { grid-template-columns: 1fr; }
      .process { grid-template-columns: 1fr 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .articles { grid-template-columns: 1fr 1fr; }
      .rating { align-items: flex-start; flex-direction: column; }
      .float-contact { right: 14px; bottom: 14px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
    }