:root {
      --ink: #182333;
      --muted: #607080;
      --paper: #fbfaf6;
      --surface: #ffffff;
      --line: #dfe6e7;
      --teal: #087f86;
      --teal-deep: #075b62;
      --coral: #f06459;
      --yellow: #f5c94b;
      --blue: #4779d8;
      --mint: #cfeee5;
      --pink: #f8d7d0;
      --shadow: 0 16px 40px rgba(31, 55, 66, .10);
      --container: min(1160px, calc(100% - 40px));
    }
    * { 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 { display: block; max-width: 100%; height: auto; }
    button, input, select, textarea { font: inherit; }
    .container { width: var(--container); margin: 0 auto; }
    .topbar {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(251,250,246,.94);
      border-bottom: 1px solid rgba(24,35,51,.09);
      backdrop-filter: blur(14px);
    }
    .nav {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .brand { display: flex; align-items: center; flex: 0 0 auto; }
    .brand img { width: 132px; max-height: 46px; 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: #415064;
      font-size: 13px;
      white-space: nowrap;
      transition: color .2s ease, transform .2s ease;
    }
    .nav-links a:hover { color: var(--coral); transform: translateY(-2px); }
    .nav-cta, .primary-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: 0;
      cursor: pointer;
      color: #fff;
      background: var(--teal);
      padding: 12px 20px;
      border-radius: 4px;
      font-weight: 700;
      box-shadow: 5px 5px 0 var(--yellow);
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-cta { padding: 9px 15px; margin-left: 10px; font-size: 13px; }
    .primary-btn:hover, .nav-cta:hover { transform: translate(-2px,-2px); box-shadow: 8px 8px 0 var(--coral); background: var(--teal-deep); }
    .outline-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--ink);
      color: var(--ink);
      padding: 11px 19px;
      border-radius: 4px;
      font-weight: 700;
      transition: background .2s ease, color .2s ease, transform .2s ease;
    }
    .outline-btn:hover { color: #fff; background: var(--ink); transform: translateY(-2px); }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; padding: 8px 11px; cursor: pointer; }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 82px 0 70px;
      background: #eaf6f1;
      border-bottom: 1px solid #d4e7df;
    }
    .hero:before, .hero:after {
      content: "";
      position: absolute;
      pointer-events: none;
      border: 4px solid var(--coral);
      transform: rotate(-7deg);
    }
    .hero:before { width: 180px; height: 70px; right: 5%; top: 70px; border-left-color: transparent; border-radius: 50%; }
    .hero:after { width: 120px; height: 120px; left: -45px; bottom: -50px; border-color: var(--yellow); border-radius: 45% 55% 40% 60%; }
    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
      gap: 52px;
      align-items: center;
    }
    .eyebrow, .section-kicker {
      color: var(--coral);
      font-size: 13px;
      letter-spacing: .08em;
      font-weight: 800;
      text-transform: uppercase;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      max-width: 680px;
      margin-bottom: 22px;
      font-size: clamp(38px, 6vw, 68px);
      line-height: 1.12;
      letter-spacing: 0;
    }
    .hero-copy { max-width: 650px; color: #405264; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 17px; margin-top: 30px; }
    .hero-note { margin-top: 25px; color: var(--teal-deep); font-size: 14px; font-weight: 700; }
    .hero-panel {
      position: relative;
      padding: 26px;
      background: var(--surface);
      border: 1px solid #d8e4e1;
      box-shadow: var(--shadow);
      transform: rotate(1.2deg);
    }
    .hero-panel:before {
      content: "";
      position: absolute;
      width: 70px;
      height: 12px;
      top: -9px;
      left: 30px;
      background: var(--yellow);
      transform: rotate(-4deg);
    }
    .panel-title { font-weight: 800; font-size: 20px; margin-bottom: 18px; }
    .question-list { display: grid; gap: 11px; }
    .question-list div {
      padding: 12px 14px;
      background: #f4f8f7;
      border-left: 4px solid var(--teal);
      color: #38495a;
      font-size: 14px;
    }
    .question-list div:nth-child(2) { border-left-color: var(--coral); }
    .question-list div:nth-child(3) { border-left-color: var(--blue); }
    .metrics { padding: 30px 0; background: #fff; border-bottom: 1px solid var(--line); }
    .metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
    .metric { padding: 10px 26px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--teal); font-size: 32px; line-height: 1.1; }
    .metric span { color: var(--muted); font-size: 14px; }
    section { padding: 86px 0; }
    .section-heading { max-width: 720px; margin-bottom: 34px; }
    .section-heading h2 { margin: 8px 0 12px; font-size: clamp(28px, 4vw, 46px); line-height: 1.2; }
    .section-heading p { color: var(--muted); font-size: 16px; }
    .about-band { background: #fffdf8; }
    .about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; align-items: start; }
    .about-lead { font-size: 24px; line-height: 1.5; font-weight: 700; }
    .about-text { color: var(--muted); }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
    .tag-cloud span { padding: 7px 12px; color: var(--teal-deep); background: var(--mint); border-radius: 2px; font-size: 13px; }
    .tag-cloud span:nth-child(3n) { background: var(--pink); color: #914943; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .service-card {
      padding: 24px;
      background: #fff;
      border: 1px solid var(--line);
      border-top: 5px solid var(--teal);
      transition: transform .25s ease, box-shadow .25s ease;
    }
    .service-card:nth-child(3n+2) { border-top-color: var(--coral); }
    .service-card:nth-child(3n) { border-top-color: var(--blue); }
    .service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
    .service-card h3 { font-size: 19px; margin-bottom: 9px; }
    .service-card p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .service-icon { font-size: 25px; margin-bottom: 16px; color: var(--coral); font-weight: 800; }
    .process-band { background: #eaf6f1; }
    .process-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
    .process-step { position: relative; padding: 22px 17px; background: #fff; border-bottom: 4px solid var(--yellow); }
    .process-step:nth-child(even) { border-bottom-color: var(--coral); }
    .step-no { display: inline-block; color: var(--teal); font-size: 30px; font-weight: 900; line-height: 1; margin-bottom: 18px; }
    .process-step h3 { font-size: 17px; margin-bottom: 8px; }
    .process-step p { color: var(--muted); font-size: 13px; margin: 0; }
    .solution-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .solution-card { padding: 26px; background: #fff; border: 1px solid var(--line); }
    .solution-card h3 { margin-bottom: 10px; }
    .solution-card p { color: var(--muted); margin-bottom: 0; }
    .network-band { background: #1c3040; color: #fff; }
    .network-band .section-heading p { color: #cbd8de; }
    .model-list { display: flex; flex-wrap: wrap; gap: 10px; }
    .model-list span { color: #e9f5f1; border: 1px solid #58717c; padding: 9px 14px; font-size: 13px; background: rgba(255,255,255,.06); }
    .network-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 60px; align-items: center; }
    .network-stat { padding: 26px; border-left: 6px solid var(--yellow); background: rgba(255,255,255,.07); }
    .network-stat strong { display: block; font-size: 38px; color: var(--yellow); }
    .cases-grid { display: grid; grid-template-columns: 1.1fr .9fr .9fr; gap: 18px; align-items: start; }
    .case-card { overflow: hidden; background: #fff; border: 1px solid var(--line); }
    .case-card.featured { grid-row: span 2; }
    .case-image { aspect-ratio: 16 / 9; overflow: hidden; background: #dae8e3; }
    .case-image img { width: 100%; height: 100%; object-fit: cover; }
    .case-content { padding: 20px; }
    .case-content h3 { margin-bottom: 8px; }
    .case-content p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .compare-band { background: #fffdf8; }
    .rating-box { display: flex; align-items: center; gap: 28px; padding: 24px; background: #f7efd2; border-left: 6px solid var(--yellow); margin-bottom: 24px; }
    .rating-score { font-size: 48px; font-weight: 900; color: var(--teal-deep); line-height: 1; }
    .stars { color: #d98c19; font-size: 22px; letter-spacing: 2px; }
    .table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; min-width: 760px; border-collapse: collapse; text-align: left; }
    th, td { padding: 16px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #eaf6f1; color: var(--teal-deep); font-size: 14px; }
    td { color: var(--muted); font-size: 14px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .match-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 50px; align-items: start; }
    .price-list { display: grid; gap: 12px; }
    .price-row { display: flex; justify-content: space-between; gap: 15px; padding: 15px 17px; background: #fff; border: 1px solid var(--line); }
    .price-row strong { color: var(--teal); }
    .form-card { padding: 28px; background: #fff; border: 1px solid var(--line); box-shadow: 8px 8px 0 #dcece5; }
    .form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .field { display: grid; gap: 7px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 700; color: #415064; }
    input, select, textarea { width: 100%; padding: 12px 13px; color: var(--ink); background: #fbfcfb; border: 1px solid #cfdada; border-radius: 2px; outline: 0; }
    input:focus, select:focus, textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(8,127,134,.12); }
    textarea { min-height: 126px; resize: vertical; }
    .form-submit { margin-top: 20px; }
    .faq-list { display: grid; gap: 10px; max-width: 900px; }
    .faq-item { background: #fff; border: 1px solid var(--line); }
    .faq-item summary { cursor: pointer; padding: 17px 20px; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 18px; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary:after { content: "+"; color: var(--coral); font-size: 22px; line-height: 1; }
    .faq-item[open] summary:after { content: "−"; }
    .faq-answer { padding: 0 20px 18px; color: var(--muted); font-size: 14px; }
    .reviews-band { background: #eaf6f1; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; }
    .review-card { padding: 22px; background: #fff; border: 1px solid #d6e4df; }
    .review-card p { color: #405264; font-size: 14px; }
    .review-card footer { color: var(--teal-deep); font-weight: 800; font-size: 13px; }
    .review-card:nth-child(2n) { transform: translateY(10px); }
    .articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .article-card { padding: 22px; background: #fff; border: 1px solid var(--line); }
    .article-card span { color: var(--coral); font-size: 12px; font-weight: 800; }
    .article-card h3 { margin: 9px 0; font-size: 18px; }
    .article-card p { color: var(--muted); font-size: 14px; margin: 0; }
    .article-card a:hover h3 { color: var(--teal); }
    .contact-band { background: #f7efd2; }
    .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
    .contact-details { display: grid; gap: 12px; color: #405264; }
    .contact-details strong { color: var(--ink); }
    .qr-box { display: flex; align-items: center; gap: 20px; padding: 20px; background: #fff; border: 1px solid #eadca9; }
    .qr-box img { width: 112px; }
    .footer { padding: 42px 0 24px; color: #d9e6e9; background: #182733; }
    .footer-grid { display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 40px; padding-bottom: 30px; }
    .footer h3 { color: #fff; margin-bottom: 12px; }
    .footer p, .footer a { color: #b9ccd1; font-size: 14px; }
    .footer a:hover { color: var(--yellow); }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; }
    .copyright { padding-top: 20px; border-top: 1px solid #38505a; color: #9bb1b7; font-size: 12px; }
    .float-tools { position: fixed; right: 18px; bottom: 22px; z-index: 15; display: grid; gap: 8px; }
    .float-tools a { display: flex; align-items: center; justify-content: center; width: 46px; height: 46px; color: #fff; background: var(--teal); border: 2px solid #fff; box-shadow: 0 7px 18px rgba(0,0,0,.15); font-size: 12px; text-align: center; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s 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: 12px 20px 20px; background: var(--paper); border-bottom: 1px solid var(--line); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 10px; }
      .nav-cta { margin: 8px 0 0; }
      .menu-toggle { display: block; }
      .hero-grid, .about-grid, .network-layout, .match-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .process-grid { grid-template-columns: repeat(3, 1fr); }
      .cases-grid { grid-template-columns: repeat(2, 1fr); }
      .case-card.featured { grid-row: auto; }
    }
    @media (max-width: 650px) {
      :root { --container: min(100% - 28px, 1160px); }
      section { padding: 60px 0; }
      .hero { padding: 58px 0 54px; }
      h1 { font-size: 42px; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .metric { padding: 13px 10px; border-bottom: 1px solid var(--line); }
      .metric:nth-child(2) { border-right: 0; }
      .service-grid, .solution-grid, .review-grid, .articles-grid, .cases-grid { grid-template-columns: 1fr; }
      .process-grid { grid-template-columns: 1fr 1fr; }
      .review-card:nth-child(2n) { transform: none; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .rating-box { align-items: flex-start; flex-direction: column; gap: 10px; }
      .footer-grid { grid-template-columns: 1fr; gap: 25px; }
      .brand img { width: 116px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *:before, *:after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
      .reveal { opacity: 1; transform: none; }
    }