:root {
      --bg: #edf1f3;
      --surface: #f8fafb;
      --paper: #ffffff;
      --ink: #1c2930;
      --muted: #667780;
      --line: #d8e0e3;
      --accent: #315d70;
      --accent-dark: #214755;
      --soft: #dcebf0;
      --warm: #d79e6d;
      --shadow: 0 14px 34px rgba(34, 57, 67, 0.08);
      --container: 1180px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      background: var(--bg);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      font-size: 16px;
      line-height: 1.75;
    }

    a {
      color: inherit;
    }

    .container {
      width: min(var(--container), calc(100% - 40px));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(248, 250, 251, 0.94);
      border-bottom: 1px solid rgba(216, 224, 227, 0.92);
      backdrop-filter: blur(12px);
    }

    .nav {
      min-height: 70px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      font-size: 18px;
      font-weight: 700;
      letter-spacing: 0;
    }

    .brand-mark {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      background: var(--ink);
      color: #fff;
      font-size: 20px;
      line-height: 1;
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      flex-wrap: wrap;
      gap: 18px;
      font-size: 14px;
      color: #53636b;
    }

    .nav-links a {
      text-decoration: none;
      transition: color 0.2s ease;
    }

    .nav-links a:hover,
    .nav-links a:focus-visible {
      color: var(--accent);
    }

    .nav-call {
      padding: 8px 13px;
      border: 1px solid var(--accent);
      color: var(--accent) !important;
    }

    main {
      overflow: hidden;
    }

    .hero {
      padding: 64px 0 48px;
      background:
        linear-gradient(115deg, rgba(220, 235, 240, 0.92), rgba(248, 250, 251, 0.82) 54%, rgba(232, 239, 241, 0.9));
      border-bottom: 1px solid var(--line);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
      gap: 48px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      margin: 0 0 16px;
      color: var(--accent);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.08em;
    }

    .eyebrow::before {
      width: 28px;
      height: 1px;
      content: "";
      background: currentColor;
    }

    h1,
    h2,
    h3,
    p {
      margin-top: 0;
    }

    h1 {
      max-width: 700px;
      margin-bottom: 18px;
      font-size: clamp(32px, 5vw, 54px);
      line-height: 1.18;
      letter-spacing: 0;
    }

    .hero-copy {
      max-width: 650px;
      margin-bottom: 26px;
      color: #4d5f68;
      font-size: 17px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .button {
      display: inline-flex;
      min-height: 46px;
      align-items: center;
      justify-content: center;
      padding: 10px 18px;
      border: 1px solid transparent;
      text-decoration: none;
      font-weight: 700;
      transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
    }

    .button:hover,
    .button:focus-visible {
      transform: translateY(-2px);
    }

    .button-primary {
      background: var(--accent);
      color: #fff;
    }

    .button-primary:hover,
    .button-primary:focus-visible {
      background: var(--accent-dark);
    }

    .button-secondary {
      border-color: #9baeb6;
      color: var(--ink);
      background: rgba(255, 255, 255, 0.62);
    }

    .hero-panel {
      padding: 26px;
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(216, 224, 227, 0.96);
      box-shadow: var(--shadow);
    }

    .hero-panel h2 {
      margin-bottom: 14px;
      font-size: 20px;
      line-height: 1.45;
    }

    .quick-list {
      display: grid;
      gap: 12px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .quick-list li {
      position: relative;
      padding-left: 18px;
      color: #51626a;
      font-size: 14px;
    }

    .quick-list li::before {
      position: absolute;
      top: 0.75em;
      left: 0;
      width: 7px;
      height: 7px;
      content: "";
      background: var(--warm);
      border-radius: 50%;
    }

    .directory {
      padding: 17px 0;
      border-bottom: 1px solid var(--line);
      background: #f6f8f9;
    }

    .directory-content {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px 16px;
      color: var(--muted);
      font-size: 14px;
    }

    .directory strong {
      color: var(--ink);
    }

    .directory a {
      color: var(--accent);
      text-decoration: none;
    }

    .section {
      padding: 58px 0;
    }

    .section-alt {
      background: #e5ecef;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .section-head {
      max-width: 720px;
      margin-bottom: 28px;
    }

    .section-kicker {
      margin-bottom: 8px;
      color: var(--accent);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.06em;
    }

    h2 {
      margin-bottom: 12px;
      font-size: clamp(25px, 3.5vw, 35px);
      line-height: 1.28;
      letter-spacing: 0;
    }

    h3 {
      margin-bottom: 8px;
      font-size: 18px;
      line-height: 1.45;
    }

    .section-head p {
      margin-bottom: 0;
      color: var(--muted);
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      border-top: 1px solid var(--line);
      border-left: 1px solid var(--line);
      background: var(--paper);
    }

    .service-item {
      min-height: 148px;
      padding: 24px;
      border-right: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
      transition: background-color 0.2s ease, box-shadow 0.2s ease;
    }

    .service-item:hover {
      background: #f5fafb;
      box-shadow: inset 0 3px 0 var(--accent);
    }

    .service-number {
      display: block;
      margin-bottom: 13px;
      color: var(--accent);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.06em;
    }

    .service-item p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .solution-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(310px, 0.83fr);
      gap: 38px;
      align-items: start;
    }

    .article-content {
      color: #465862;
    }

    .article-content p {
      margin-bottom: 18px;
    }

    .article-content strong {
      color: var(--ink);
    }

    .process {
      display: grid;
      gap: 0;
      border-top: 1px solid var(--line);
    }

    .process-item {
      display: grid;
      grid-template-columns: 44px minmax(0, 1fr);
      gap: 14px;
      padding: 17px 0;
      border-bottom: 1px solid var(--line);
    }

    .process-index {
      display: grid;
      width: 32px;
      height: 32px;
      place-items: center;
      background: var(--accent);
      color: #fff;
      font-size: 13px;
      font-weight: 700;
    }

    .process-item h3 {
      margin-bottom: 3px;
      font-size: 16px;
    }

    .process-item p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .side-note {
      padding: 27px;
      background: var(--ink);
      color: #dbe5e8;
    }

    .side-note h3 {
      color: #fff;
    }

    .side-note p {
      color: #c2d1d6;
      font-size: 14px;
    }

    .side-note ul {
      margin: 18px 0 0;
      padding-left: 18px;
    }

    .side-note li {
      margin-bottom: 8px;
      font-size: 14px;
    }

    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .guarantee-card {
      padding: 24px;
      background: var(--paper);
      border: 1px solid var(--line);
      box-shadow: 0 8px 22px rgba(34, 57, 67, 0.04);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .guarantee-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow);
    }

    .guarantee-card p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .faq-list {
      border-top: 1px solid var(--line);
    }

    details {
      border-bottom: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.38);
    }

    summary {
      position: relative;
      padding: 18px 42px 18px 0;
      color: var(--ink);
      cursor: pointer;
      font-weight: 700;
      list-style: none;
    }

    summary::-webkit-details-marker {
      display: none;
    }

    summary::after {
      position: absolute;
      top: 18px;
      right: 8px;
      color: var(--accent);
      content: "+";
      font-size: 22px;
      font-weight: 400;
      line-height: 1;
    }

    details[open] summary::after {
      content: "−";
    }

    .faq-answer {
      max-width: 900px;
      padding: 0 0 18px;
      color: var(--muted);
      font-size: 15px;
    }

    .contact-section {
      padding: 54px 0;
      background: #dce7eb;
      border-top: 1px solid #cad7dc;
    }

    .contact-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
      gap: 38px;
      align-items: center;
    }

    .contact-layout h2 {
      margin-bottom: 12px;
    }

    .contact-layout > div > p {
      max-width: 690px;
      color: #53666f;
    }

    .contact-meta {
      display: grid;
      gap: 9px;
      margin: 22px 0 24px;
      color: #394e58;
      font-size: 15px;
    }

    .contact-meta strong {
      color: var(--ink);
    }

    .qr-card {
      padding: 20px;
      background: #fff;
      border: 1px solid #c5d3d8;
      text-align: center;
    }

    .qr-card img {
      display: block;
      width: min(190px, 100%);
      height: auto;
      margin: 0 auto 14px;
      background: #f2f5f6;
    }

    .qr-card p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .qr-card a {
      color: var(--accent);
      font-weight: 700;
      text-decoration: none;
    }

    .site-footer {
      padding: 22px 0;
      background: #1e2d34;
      color: #d7e1e4;
    }

    .footer-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-size: 13px;
    }

    .footer-content p {
      margin: 0;
    }

    .footer-content a {
      color: #fff;
      text-decoration: none;
    }

    .reveal {
      opacity: 0;
      transform: translateY(16px);
      transition: opacity 0.55s ease, transform 0.55s ease;
    }

    .reveal.is-visible {
      opacity: 1;
      transform: translateY(0);
    }

    @media (max-width: 820px) {
      .nav {
        padding: 13px 0;
        align-items: flex-start;
      }

      .nav-links {
        max-width: 70%;
        gap: 8px 13px;
        font-size: 13px;
      }

      .nav-call {
        padding: 3px 0;
        border: 0;
      }

      .hero {
        padding: 45px 0 38px;
      }

      .hero-grid,
      .solution-layout,
      .contact-layout {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      .service-grid,
      .guarantee-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .hero-panel {
        max-width: 620px;
      }

      .qr-card {
        max-width: 310px;
      }
    }

    @media (max-width: 540px) {
      .container {
        width: min(var(--container), calc(100% - 28px));
      }

      .nav {
        gap: 13px;
      }

      .brand {
        font-size: 16px;
      }

      .brand-mark {
        width: 31px;
        height: 31px;
      }

      .nav-links {
        max-width: 68%;
        gap: 5px 11px;
        font-size: 12px;
        line-height: 1.45;
      }

      .hero-copy {
        font-size: 16px;
      }

      .section,
      .contact-section {
        padding: 42px 0;
      }

      .service-grid,
      .guarantee-grid {
        grid-template-columns: 1fr;
      }

      .service-item {
        min-height: auto;
        padding: 21px;
      }

      .hero-panel,
      .side-note,
      .guarantee-card {
        padding: 21px;
      }

      .footer-content {
        align-items: flex-start;
        flex-direction: column;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }

      *,
      *::before,
      *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
      }

      .reveal {
        opacity: 1;
        transform: none;
      }
    }