:root {
      --bg: #f7fbff;
      --bg-2: #fff8f0;
      --text: #1d2633;
      --muted: #5d6978;
      --line: rgba(70, 94, 128, 0.16);
      --brand: #2563eb;
      --brand-2: #7c3aed;
      --brand-3: #06b6d4;
      --warm: #ffedd5;
      --card: rgba(255,255,255,0.78);
      --shadow: 0 18px 50px rgba(45, 72, 118, 0.14);
      --radius: 24px;
      --container: 1120px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at 12% 10%, rgba(125, 92, 255, 0.16), transparent 30%),
        radial-gradient(circle at 86% 16%, rgba(6, 182, 212, 0.16), transparent 28%),
        radial-gradient(circle at 50% 88%, rgba(255, 180, 110, 0.18), transparent 34%),
        linear-gradient(135deg, var(--bg) 0%, #ffffff 42%, var(--bg-2) 100%);
      line-height: 1.75;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: min(100% - 32px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      backdrop-filter: blur(18px);
      background: rgba(248, 251, 255, 0.82);
      border-bottom: 1px solid var(--line);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      letter-spacing: 0.04em;
      color: #152033;
      white-space: nowrap;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: #ffffff;
      font-size: 22px;
      font-weight: 900;
      background: linear-gradient(135deg, var(--brand), var(--brand-2) 48%, var(--brand-3));
      box-shadow: 0 12px 28px rgba(37, 99, 235, 0.22);
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 22px;
      color: #2d3a4c;
      font-size: 15px;
    }

    .nav-links a {
      position: relative;
      padding: 8px 0;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 2px;
      height: 2px;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--brand), var(--brand-3));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform .25s ease;
    }

    .nav-links a:hover::after {
      transform: scaleX(1);
    }

    .nav-cta {
      padding: 10px 16px;
      border-radius: 999px;
      color: #ffffff;
      background: linear-gradient(135deg, #2457e6, #7c3aed);
      box-shadow: 0 10px 24px rgba(37, 99, 235, 0.2);
      font-weight: 700;
    }

    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: rgba(255,255,255,0.82);
      color: var(--text);
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      margin: 5px auto;
      background: #243247;
      border-radius: 999px;
    }

    main {
      padding: 34px 0 0;
    }

    section {
      padding: 42px 0;
    }

    .hero {
      padding-top: 28px;
    }

    .hero-panel {
      position: relative;
      overflow: hidden;
      display: grid;
      grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.86fr);
      gap: 34px;
      align-items: center;
      border: 1px solid rgba(110, 136, 180, 0.18);
      border-radius: 34px;
      padding: 44px;
      background:
        linear-gradient(135deg, rgba(255,255,255,0.88), rgba(255,255,255,0.62)),
        radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.13), transparent 34%),
        radial-gradient(circle at 22% 88%, rgba(6, 182, 212, 0.12), transparent 32%);
      box-shadow: var(--shadow);
    }

    .hero-panel::before {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      right: -80px;
      top: -90px;
      border-radius: 50%;
      background: conic-gradient(from 90deg, rgba(37,99,235,.12), rgba(6,182,212,.16), rgba(124,58,237,.14), rgba(37,99,235,.12));
      animation: floatGlow 8s ease-in-out infinite;
    }

    .hero-content,
    .hero-visual {
      position: relative;
      z-index: 1;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 13px;
      border: 1px solid rgba(37,99,235,0.16);
      border-radius: 999px;
      color: #1f4fbd;
      background: rgba(255,255,255,0.72);
      font-size: 14px;
      font-weight: 700;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #22c55e;
      box-shadow: 0 0 0 6px rgba(34,197,94,.12);
    }

    h1 {
      margin: 18px 0 16px;
      font-size: clamp(34px, 6vw, 58px);
      line-height: 1.08;
      letter-spacing: -0.04em;
      color: #122033;
    }

    .lead {
      max-width: 660px;
      margin: 0;
      color: #485769;
      font-size: 18px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 26px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      padding: 12px 18px;
      border-radius: 15px;
      font-weight: 800;
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }

    .btn:hover {
      transform: translateY(-2px);
    }

    .btn-primary {
      color: #ffffff;
      background: linear-gradient(135deg, #2563eb, #7c3aed);
      box-shadow: 0 14px 28px rgba(37, 99, 235, 0.24);
    }

    .btn-ghost {
      color: #213047;
      background: rgba(255,255,255,0.78);
      border: 1px solid var(--line);
    }

    .quick-notes {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: 28px;
    }

    .note {
      padding: 13px 14px;
      border-radius: 18px;
      background: rgba(255,255,255,0.74);
      border: 1px solid rgba(85, 112, 155, 0.14);
      color: #334155;
      font-size: 14px;
    }

    .visual-card {
      padding: 16px;
      border-radius: 30px;
      border: 1px solid rgba(255,255,255,.72);
      background: rgba(255,255,255,0.56);
      box-shadow: 0 24px 46px rgba(55, 77, 120, 0.15);
    }

    .image-wrap {
      overflow: hidden;
      border-radius: 22px;
      background: linear-gradient(135deg, #eef6ff, #fff7ed);
      border: 1px solid rgba(70, 94, 128, 0.12);
    }

    .image-wrap img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: contain;
      padding: 10px;
    }

    .visual-caption {
      display: grid;
      gap: 8px;
      margin-top: 14px;
      padding: 15px;
      border-radius: 18px;
      background: rgba(255,255,255,0.8);
    }

    .caption-title {
      margin: 0;
      font-size: 16px;
      font-weight: 800;
      color: #172033;
    }

    .caption-text {
      margin: 0;
      color: #5b6776;
      font-size: 14px;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 22px;
    }

    .section-head h2 {
      margin: 0;
      font-size: clamp(26px, 4vw, 38px);
      line-height: 1.18;
      letter-spacing: -0.03em;
      color: #142033;
    }

    .section-head p {
      max-width: 520px;
      margin: 0;
      color: var(--muted);
    }

    .toc {
      padding: 18px;
      border-radius: 22px;
      background: rgba(255,255,255,0.72);
      border: 1px solid var(--line);
      box-shadow: 0 12px 32px rgba(47, 72, 112, 0.08);
    }

    .toc h2 {
      margin: 0 0 12px;
      font-size: 20px;
      color: #172033;
    }

    .toc-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .toc-links a {
      padding: 9px 12px;
      border-radius: 999px;
      color: #24507e;
      background: rgba(238, 246, 255, 0.9);
      border: 1px solid rgba(37, 99, 235, 0.12);
      font-size: 14px;
    }

    .solution-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
    }

    .solution-card {
      position: relative;
      overflow: hidden;
      padding: 24px;
      border-radius: 26px;
      background: var(--card);
      border: 1px solid var(--line);
      box-shadow: 0 14px 38px rgba(46, 70, 110, 0.09);
      transition: transform .24s ease, box-shadow .24s ease;
    }

    .solution-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 22px 48px rgba(46, 70, 110, 0.14);
    }

    .solution-card::after {
      content: "";
      position: absolute;
      right: 20px;
      top: 20px;
      width: 54px;
      height: 54px;
      border-radius: 18px;
      background: linear-gradient(135deg, rgba(37,99,235,.12), rgba(6,182,212,.12));
    }

    .solution-card h3 {
      margin: 0 0 10px;
      font-size: 21px;
      color: #152033;
    }

    .solution-card p {
      margin: 0;
      color: #586678;
    }

    .steps {
      display: grid;
      grid-template-columns: 0.85fr 1.15fr;
      gap: 18px;
      align-items: start;
    }

    .steps-intro {
      padding: 26px;
      border-radius: 28px;
      background: linear-gradient(135deg, rgba(255,255,255,0.86), rgba(239,246,255,0.74));
      border: 1px solid var(--line);
      box-shadow: 0 14px 36px rgba(49, 73, 118, 0.1);
    }

    .steps-intro h2 {
      margin: 0 0 12px;
      font-size: 30px;
      line-height: 1.22;
    }

    .steps-intro p {
      margin: 0;
      color: var(--muted);
    }

    .step-list {
      display: grid;
      gap: 12px;
    }

    .step-item {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 14px;
      padding: 18px;
      border-radius: 22px;
      background: rgba(255,255,255,0.76);
      border: 1px solid var(--line);
    }

    .step-num {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 12px;
      color: #ffffff;
      background: linear-gradient(135deg, #2563eb, #06b6d4);
      font-weight: 900;
      flex: none;
    }

    .step-item h3 {
      margin: 0 0 5px;
      font-size: 18px;
      color: #172033;
    }

    .step-item p {
      margin: 0;
      color: #5b6776;
    }

    .service-band {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    .service-card {
      padding: 22px;
      border-radius: 26px;
      background: rgba(255,255,255,0.74);
      border: 1px solid var(--line);
      box-shadow: 0 12px 34px rgba(47, 72, 112, 0.08);
    }

    .service-card h3 {
      margin: 0 0 10px;
      font-size: 19px;
      color: #172033;
    }

    .service-card p,
    .service-card li {
      color: #5b6776;
    }

    .service-card ul {
      padding-left: 18px;
      margin: 0;
    }

    .store-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      padding: 24px;
      border-radius: 28px;
      background: linear-gradient(135deg, rgba(255,255,255,0.82), rgba(240,249,255,0.72));
      border: 1px solid var(--line);
      box-shadow: 0 16px 42px rgba(47, 72, 112, 0.1);
    }

    .store-box h2 {
      margin: 0 0 12px;
      font-size: 28px;
    }

    .store-info {
      display: grid;
      gap: 10px;
      margin: 0;
    }

    .store-info div {
      padding: 13px 14px;
      border-radius: 16px;
      background: rgba(255,255,255,0.72);
      border: 1px solid rgba(70,94,128,.1);
      color: #334155;
    }

    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-content: start;
    }

    .service-tags span {
      display: inline-flex;
      padding: 9px 12px;
      border-radius: 999px;
      background: rgba(238, 246, 255, 0.86);
      border: 1px solid rgba(37,99,235,.12);
      color: #294669;
      font-size: 14px;
    }

    .faq-list {
      display: grid;
      gap: 12px;
    }

    .faq-item {
      border-radius: 22px;
      background: rgba(255,255,255,0.76);
      border: 1px solid var(--line);
      overflow: hidden;
      box-shadow: 0 10px 28px rgba(47, 72, 112, 0.07);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 20px;
      border: 0;
      background: transparent;
      color: #172033;
      text-align: left;
      font-size: 17px;
      font-weight: 800;
      cursor: pointer;
    }

    .faq-icon {
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: rgba(37,99,235,.1);
      color: #2457e6;
      flex: none;
      transition: transform .22s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .28s ease;
    }

    .faq-answer p {
      margin: 0;
      padding: 0 20px 18px;
      color: #5b6776;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .links-wrap {
      padding: 24px;
      border-radius: 28px;
      background: rgba(255,255,255,0.72);
      border: 1px solid var(--line);
    }

    .links-wrap h2 {
      margin: 0 0 12px;
      font-size: 26px;
      color: #172033;
    }

    .link-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
    }

    .link-grid a {
      padding: 12px 14px;
      border-radius: 16px;
      color: #24507e;
      background: rgba(238, 246, 255, 0.76);
      border: 1px solid rgba(37,99,235,.1);
      transition: transform .2s ease, background .2s ease;
    }

    .link-grid a:hover {
      transform: translateY(-2px);
      background: rgba(224, 242, 254, 0.9);
    }

    .summary {
      padding-bottom: 36px;
    }

    .summary-card {
      padding: 30px;
      border-radius: 30px;
      background:
        linear-gradient(135deg, rgba(37,99,235,0.08), rgba(6,182,212,0.08)),
        rgba(255,255,255,0.78);
      border: 1px solid var(--line);
      box-shadow: 0 18px 46px rgba(47, 72, 112, 0.1);
    }

    .summary-card h2 {
      margin: 0 0 12px;
      font-size: 30px;
      color: #142033;
    }

    .summary-card p {
      margin: 0;
      color: #536174;
    }

    .site-footer {
      background: #eef6ff;
      color: #243247;
      border-top: 1px solid rgba(70,94,128,.14);
      padding: 26px 0;
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      color: #334155;
      font-size: 14px;
    }

    .footer-links {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
    }

    .footer-links a {
      color: #24507e;
    }

    .back-top {
      position: fixed;
      right: 18px;
      bottom: 18px;
      width: 44px;
      height: 44px;
      border: 1px solid rgba(37,99,235,.18);
      border-radius: 16px;
      background: rgba(255,255,255,0.9);
      color: #2457e6;
      box-shadow: 0 12px 28px rgba(47, 72, 112, 0.16);
      cursor: pointer;
      opacity: 0;
      pointer-events: none;
      transform: translateY(10px);
      transition: opacity .22s ease, transform .22s ease;
    }

    .back-top.show {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }

    .reveal {
      opacity: 0;
      transform: translateY(16px);
      transition: opacity .55s ease, transform .55s ease;
    }

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

    @keyframes floatGlow {
      0%, 100% {
        transform: translate3d(0, 0, 0) rotate(0deg);
      }
      50% {
        transform: translate3d(-16px, 18px, 0) rotate(12deg);
      }
    }

    @media (max-width: 900px) {
      .menu-toggle {
        display: block;
      }

      .nav-links {
        position: absolute;
        left: 16px;
        right: 16px;
        top: 72px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding: 14px;
        border-radius: 22px;
        background: rgba(255,255,255,0.96);
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
      }

      .nav-links.open {
        display: flex;
      }

      .nav-links a {
        padding: 10px 12px;
        border-radius: 12px;
      }

      .nav-cta {
        text-align: center;
      }

      .hero-panel,
      .steps,
      .store-box {
        grid-template-columns: 1fr;
      }

      .hero-panel {
        padding: 30px;
      }

      .quick-notes,
      .service-band {
        grid-template-columns: 1fr;
      }

      .section-head {
        align-items: flex-start;
        flex-direction: column;
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

      main {
        padding-top: 18px;
      }

      section {
        padding: 30px 0;
      }

      .hero-panel {
        padding: 22px;
        border-radius: 26px;
      }

      .hero-actions {
        flex-direction: column;
      }

      .btn {
        width: 100%;
      }

      .solution-grid,
      .link-grid {
        grid-template-columns: 1fr;
      }

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