:root {
      --ink: #17212b;
      --muted: #61707d;
      --paper: #fffdf8;
      --cream: #fff6dc;
      --mint: #d9f5e7;
      --sky: #dff2ff;
      --coral: #ff745e;
      --yellow: #ffd84d;
      --blue: #2d71d4;
      --line: #e7e5dc;
      --shadow: 0 18px 40px rgba(32, 43, 53, .09);
      --radius: 18px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "Microsoft YaHei", "PingFang SC", 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(255,253,248,.94);
      border-bottom: 1px solid rgba(231,229,220,.9);
      backdrop-filter: blur(12px);
    }
    .header-inner {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      flex: 0 0 auto;
    }
    .ai-page-logo { width: 116px; }
    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 8px 10px;
      color: #43505a;
      font-size: 13px;
      transition: color .2s, transform .2s;
    }
    .nav-links a:hover { color: var(--coral); transform: translateY(-2px); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 10px 18px;
      border: 0;
      border-radius: 10px;
      background: var(--coral);
      color: #fff;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 8px 18px rgba(255,116,94,.22);
      transition: transform .2s, box-shadow .2s, background .2s;
    }
    .nav-cta { margin-left: 12px; min-height: 38px; padding: 8px 14px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-3px); box-shadow: 0 12px 24px rgba(255,116,94,.3); background: #ed624e; }
    .button.alt { background: var(--blue); box-shadow: 0 8px 18px rgba(45,113,212,.2); }
    .button.light { color: var(--ink); background: var(--yellow); box-shadow: none; }
    .menu-toggle { display: none; border: 0; background: transparent; font-size: 26px; color: var(--ink); }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 90px 0 72px;
      background:
        linear-gradient(135deg, rgba(255,246,220,.96), rgba(223,242,255,.9) 52%, rgba(217,245,231,.9));
    }
    .hero:before, .hero:after {
      content: "";
      position: absolute;
      border: 3px solid rgba(255,116,94,.22);
      transform: rotate(-9deg);
      pointer-events: none;
    }
    .hero:before { width: 190px; height: 65px; top: 70px; right: 9%; border-radius: 48% 52% 44% 56%; }
    .hero:after { width: 100px; height: 100px; bottom: 26px; left: 5%; border-radius: 40% 60% 55% 45%; border-color: rgba(45,113,212,.18); }
    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(330px, .95fr);
      gap: 58px;
      align-items: center;
    }
    .eyebrow, .section-label {
      display: inline-block;
      color: var(--coral);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: .08em;
      text-transform: uppercase;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      max-width: 700px;
      margin-bottom: 20px;
      font-size: clamp(36px, 5vw, 68px);
      line-height: 1.12;
      letter-spacing: 0;
    }
    .hero-copy {
      max-width: 650px;
      color: #40505c;
      font-size: 18px;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0; }
    .hero-note { color: #56636b; font-size: 14px; }
    .hero-board {
      padding: 24px;
      border: 2px solid var(--ink);
      border-radius: 22px 12px 25px 14px;
      background: rgba(255,255,255,.64);
      box-shadow: 10px 12px 0 rgba(255,116,94,.16);
      transform: rotate(1.5deg);
    }
    .board-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 20px; }
    .board-title { font-weight: 800; font-size: 19px; }
    .board-mark { padding: 5px 9px; background: var(--yellow); border-radius: 7px; font-size: 12px; font-weight: 700; }
    .board-line { display: flex; align-items: center; gap: 12px; padding: 13px 0; border-top: 1px dashed #b7c1c3; }
    .board-line strong { display: block; font-size: 14px; }
    .board-line small { color: var(--muted); }
    .step-dot { flex: 0 0 30px; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--blue); color: #fff; font-weight: 800; }
    .section { padding: 82px 0; }
    .section.tint { background: var(--cream); }
    .section.mint { background: var(--mint); }
    .section-head { max-width: 720px; margin-bottom: 34px; }
    h2 { margin-bottom: 12px; font-size: clamp(28px, 4vw, 46px); line-height: 1.2; }
    h3 { margin-bottom: 8px; font-size: 20px; line-height: 1.35; }
    .section-intro { color: var(--muted); font-size: 16px; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; padding: 28px 0; }
    .metric { padding: 22px; border-left: 4px solid var(--coral); background: #fff; box-shadow: var(--shadow); }
    .metric strong { display: block; margin-bottom: 4px; color: var(--blue); font-size: 28px; }
    .metric span { color: var(--muted); font-size: 14px; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
    .service-card, .review-card, .article-card {
      padding: 24px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,.86);
      border-radius: var(--radius);
      transition: transform .25s, box-shadow .25s, border-color .25s;
    }
    .service-card:hover, .review-card:hover, .article-card:hover { transform: translateY(-6px); border-color: var(--coral); box-shadow: var(--shadow); }
    .service-card:nth-child(3n+2) { background: #fff8dc; }
    .service-card:nth-child(3n+3) { background: #edf8ff; }
    .icon {
      width: 42px; height: 42px; display: grid; place-items: center; margin-bottom: 16px;
      border-radius: 12px 7px 12px 7px; background: var(--yellow); font-size: 21px;
    }
    .service-card p, .review-card p, .article-card p { color: var(--muted); font-size: 14px; }
    .tag-list { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 20px; }
    .tag { padding: 6px 11px; border-radius: 7px; background: #fff; color: #43505a; font-size: 13px; border: 1px solid #dfe5df; }
    .about-layout, .contact-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 46px; align-items: start; }
    .highlight-list { display: grid; gap: 14px; margin: 22px 0 0; padding: 0; list-style: none; }
    .highlight-list li { padding: 15px 18px; background: #fff; border-left: 4px solid var(--blue); }
    .visual-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; }
    .visual-strip .media { overflow: hidden; border-radius: 16px; border: 5px solid #fff; box-shadow: var(--shadow); }
    .visual-strip .media:first-child { grid-column: 1 / -1; }
    .media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
    .media.square img { aspect-ratio: 1; }
    .timeline { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; counter-reset: process; }
    .timeline-item { position: relative; padding: 24px 20px; border-top: 4px solid var(--blue); background: #fff; }
    .timeline-item:not(:last-child):after { content: ""; position: absolute; top: -4px; right: -1px; width: 18px; height: 4px; background: var(--coral); }
    .timeline-item strong { display: block; margin-bottom: 8px; color: var(--coral); font-size: 14px; }
    .timeline-item p { color: var(--muted); font-size: 14px; }
    .comparison-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
    table { width: 100%; min-width: 720px; border-collapse: collapse; }
    th, td { padding: 16px 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
    th { background: #17212b; color: #fff; font-size: 14px; }
    td:first-child { font-weight: 700; }
    tr:last-child td { border-bottom: 0; }
    .rating { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
    .rating strong { color: var(--coral); font-size: 30px; }
    .stars { color: #f3b500; letter-spacing: 3px; font-size: 22px; }
    .solution-box { padding: 30px; background: #17212b; color: #fff; border-radius: 18px 34px 18px 34px; }
    .solution-box p { color: #d5e0e7; }
    .solution-box .tag { color: #17212b; }
    .price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .price-card { padding: 24px; background: #fff; border-top: 5px solid var(--coral); box-shadow: var(--shadow); }
    .price-card:nth-child(2) { border-color: var(--blue); }
    .price-card:nth-child(3) { border-color: #56a879; }
    .price-card strong { display: block; font-size: 24px; margin: 8px 0; }
    .price-card p { color: var(--muted); font-size: 14px; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .review-card { position: relative; }
    .review-card:before { content: "“"; position: absolute; top: 8px; right: 18px; color: var(--yellow); font-size: 54px; line-height: 1; }
    .review-name { margin-bottom: 10px; font-weight: 800; }
    .review-role { color: var(--coral); font-size: 13px; }
    .case-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case-card { overflow: hidden; border-radius: 15px; background: #fff; box-shadow: var(--shadow); }
    .case-card .case-content { padding: 20px; }
    .case-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
    .faq-list { display: grid; gap: 10px; }
    .faq-item { background: #fff; border: 1px solid var(--line); border-radius: 10px; }
    .faq-question { width: 100%; padding: 17px 20px; border: 0; background: transparent; color: var(--ink); text-align: left; font: inherit; font-weight: 700; cursor: pointer; display: flex; justify-content: space-between; gap: 16px; }
    .faq-question span:last-child { color: var(--coral); font-size: 20px; }
    .faq-answer { max-height: 0; overflow: hidden; padding: 0 20px; color: var(--muted); transition: max-height .3s, padding .3s; }
    .faq-item.open .faq-answer { max-height: 180px; padding: 0 20px 18px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-card { padding: 18px; border-radius: 12px; }
    .article-card a { color: var(--blue); font-weight: 700; font-size: 14px; }
    .form-panel { padding: 28px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: 18px; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: grid; gap: 7px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 14px; font-weight: 700; }
    input, select, textarea { width: 100%; padding: 12px 13px; border: 1px solid #ccd6d6; border-radius: 8px; color: var(--ink); background: #fff; font: inherit; }
    textarea { min-height: 120px; resize: vertical; }
    input:focus, select:focus, textarea:focus { outline: 3px solid rgba(45,113,212,.15); border-color: var(--blue); }
    .contact-info { padding: 30px; background: var(--sky); border-radius: 22px 12px 22px 12px; }
    .contact-info p { color: #425460; }
    .qr { width: 145px; margin: 20px 0; border: 6px solid #fff; }
    .footer { padding: 46px 0 24px; background: #17212b; color: #fff; }
    .footer-grid { display: grid; grid-template-columns: 1.2fr .8fr 1.2fr; gap: 36px; }
    .footer h3 { color: var(--yellow); font-size: 17px; }
    .footer p, .footer a { color: #c6d2d8; font-size: 14px; }
    .footer a:hover { color: #fff; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 9px 18px; }
    .copyright { margin-top: 30px; padding-top: 18px; border-top: 1px solid #3a4750; color: #9baab2; font-size: 13px; }
    .floating { position: fixed; right: 20px; bottom: 20px; z-index: 15; display: grid; gap: 9px; }
    .float-link { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; background: var(--coral); color: #fff; font-size: 20px; box-shadow: var(--shadow); cursor: pointer; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 1050px) {
      .nav-links a { padding: 7px 6px; font-size: 12px; }
      .hero-grid { gap: 30px; }
      .metrics { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 800px) {
      .header-inner { min-height: 66px; }
      .menu-toggle { display: block; }
      .nav-cta { margin-left: auto; margin-right: 10px; }
      .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; padding: 10px 20px 16px; 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: 10px; border-bottom: 1px solid #eee; }
      .hero { padding: 64px 0 52px; }
      .hero-grid, .about-layout, .contact-layout { grid-template-columns: 1fr; }
      .hero-board { max-width: 600px; transform: none; }
      .grid-3, .reviews, .case-list { grid-template-columns: 1fr 1fr; }
      .timeline { grid-template-columns: 1fr 1fr; gap: 12px; }
      .timeline-item:not(:last-child):after { display: none; }
      .price-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 520px) {
      .container { width: min(100% - 28px, 1180px); }
      h1 { font-size: 39px; }
      .hero-copy { font-size: 16px; }
      .metrics, .grid-3, .grid-2, .reviews, .case-list, .article-list, .footer-grid { grid-template-columns: 1fr; }
      .timeline { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .visual-strip { grid-template-columns: 1fr; }
      .visual-strip .media:first-child { grid-column: auto; }
      .nav-cta { padding: 8px 10px; font-size: 12px; }
      .ai-page-logo { width: 100px; }
    }