:root {
      --bg: #f4f9ff;
      --bg-soft: #edf6ff;
      --panel: #ffffff;
      --panel-blue: #f7fbff;
      --text: #1f2f46;
      --muted: #5f7088;
      --light: #8aa0b8;
      --primary: #2d7ff0;
      --primary-deep: #1b63c3;
      --mint: #77d8d2;
      --line: #dceaf7;
      --shadow: 0 18px 48px rgba(60, 115, 170, .14);
      --shadow-soft: 0 12px 28px rgba(64, 112, 160, .1);
      --radius-xl: 28px;
      --radius-lg: 20px;
      --radius-md: 14px;
      --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 8% 8%, rgba(119, 216, 210, .28), transparent 28%),
        radial-gradient(circle at 92% 18%, rgba(45, 127, 240, .16), transparent 30%),
        linear-gradient(180deg, #f7fbff 0%, #f3f9ff 52%, #f8fbff 100%);
      line-height: 1.7;
      overflow-x: hidden;
    }

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

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

    button {
      font: inherit;
    }

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(247, 251, 255, .84);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(220, 234, 247, .9);
    }

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

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      color: #172b45;
      letter-spacing: .02em;
      white-space: nowrap;
    }

    .logo-mark {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: #ffffff;
      background: linear-gradient(135deg, #2d7ff0, #77d8d2);
      box-shadow: 0 12px 26px rgba(45, 127, 240, .22);
      font-size: 22px;
      font-weight: 900;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.15;
    }

    .brand-text strong {
      font-size: 17px;
    }

    .brand-text span {
      font-size: 12px;
      color: var(--muted);
      font-weight: 600;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
      margin-left: auto;
    }

    .nav-links a {
      padding: 10px 12px;
      border-radius: 999px;
      color: #40546c;
      font-size: 14px;
      font-weight: 650;
      transition: background .2s ease, color .2s ease, transform .2s ease;
    }

    .nav-links a:hover {
      color: var(--primary-deep);
      background: rgba(45, 127, 240, .08);
      transform: translateY(-1px);
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0 18px;
      border-radius: 999px;
      background: #17375f;
      color: #ffffff;
      font-size: 14px;
      font-weight: 750;
      box-shadow: 0 12px 24px rgba(23, 55, 95, .18);
      transition: transform .2s ease, box-shadow .2s ease;
      white-space: nowrap;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 16px 30px rgba(23, 55, 95, .24);
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: #ffffff;
      color: var(--text);
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      margin: 5px auto;
      background: #1f2f46;
      border-radius: 2px;
      transition: transform .2s ease, opacity .2s ease;
    }

    .hero {
      padding: 58px 0 34px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
      gap: 34px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 13px;
      border: 1px solid rgba(45, 127, 240, .18);
      border-radius: 999px;
      background: rgba(255, 255, 255, .72);
      color: var(--primary-deep);
      font-size: 13px;
      font-weight: 750;
      box-shadow: 0 8px 18px rgba(45, 127, 240, .08);
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--mint);
      box-shadow: 0 0 0 6px rgba(119, 216, 210, .18);
    }

    h1 {
      margin: 18px 0 16px;
      font-size: clamp(34px, 6vw, 58px);
      line-height: 1.08;
      letter-spacing: -.04em;
      color: #142944;
    }

    .hero-lead {
      max-width: 650px;
      margin: 0 0 24px;
      color: #4f627a;
      font-size: 17px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin: 24px 0 22px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 48px;
      padding: 0 20px;
      border-radius: 16px;
      border: 1px solid transparent;
      font-weight: 780;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .btn-primary {
      color: #ffffff;
      background: linear-gradient(135deg, #2d7ff0, #1f6bd8);
      box-shadow: 0 16px 28px rgba(45, 127, 240, .24);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 20px 34px rgba(45, 127, 240, .3);
    }

    .btn-secondary {
      color: #1e4f83;
      background: rgba(255, 255, 255, .82);
      border-color: rgba(45, 127, 240, .18);
    }

    .btn-secondary:hover {
      transform: translateY(-2px);
      background: #ffffff;
      box-shadow: var(--shadow-soft);
    }

    .hero-notes {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
      max-width: 620px;
      margin-top: 20px;
    }

    .note {
      padding: 12px 13px;
      border-radius: 16px;
      background: rgba(255, 255, 255, .68);
      border: 1px solid rgba(220, 234, 247, .9);
      color: #3e5570;
      font-size: 13px;
      font-weight: 650;
    }

    .hero-card {
      position: relative;
      border-radius: 34px;
      padding: 18px;
      background:
        linear-gradient(145deg, rgba(255, 255, 255, .92), rgba(237, 246, 255, .78));
      border: 1px solid rgba(255, 255, 255, .9);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .hero-card::before {
      content: "";
      position: absolute;
      inset: auto -70px -80px auto;
      width: 210px;
      height: 210px;
      border-radius: 50%;
      background: rgba(119, 216, 210, .26);
      filter: blur(10px);
    }

    .phone-showcase {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .phone-frame {
      min-height: 190px;
      border-radius: 26px;
      background: #eef6ff;
      border: 1px solid rgba(220, 234, 247, .9);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 14px;
      overflow: hidden;
    }

    .phone-frame.featured {
      grid-row: span 2;
      min-height: 396px;
      background: linear-gradient(180deg, #eaf5ff, #ffffff);
    }

    .phone-frame img {
      max-height: 360px;
      object-fit: contain;
      transition: transform .35s ease;
    }

    .phone-frame:hover img {
      transform: scale(1.035);
    }

    .quick-panel {
      position: relative;
      z-index: 2;
      margin-top: 14px;
      padding: 16px;
      border-radius: 22px;
      background: rgba(255, 255, 255, .86);
      border: 1px solid rgba(220, 234, 247, .95);
    }

    .quick-panel strong {
      display: block;
      color: #17375f;
      margin-bottom: 6px;
    }

    .quick-panel p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    section {
      padding: 34px 0;
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 22px;
      margin-bottom: 20px;
    }

    .section-kicker {
      color: var(--primary-deep);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: .08em;
      text-transform: uppercase;
    }

    h2 {
      margin: 6px 0 0;
      font-size: clamp(25px, 4vw, 38px);
      line-height: 1.2;
      letter-spacing: -.025em;
      color: #172b45;
    }

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

    .services {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }

    .service-card {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255, 255, 255, .82);
      border: 1px solid rgba(220, 234, 247, .95);
      box-shadow: 0 10px 24px rgba(65, 116, 168, .08);
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }

    .service-card:hover {
      transform: translateY(-4px);
      border-color: rgba(45, 127, 240, .28);
      box-shadow: 0 18px 34px rgba(65, 116, 168, .14);
    }

    .icon {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      margin-bottom: 14px;
      color: #1559a8;
      background: linear-gradient(135deg, #e4f2ff, #f4ffff);
      font-weight: 900;
      font-size: 18px;
    }

    .service-card h3,
    .solution-card h3,
    .guard-card h3 {
      margin: 0 0 8px;
      color: #18314f;
      font-size: 18px;
      line-height: 1.35;
    }

    .service-card p,
    .solution-card p,
    .guard-card p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .solution-wrap {
      display: grid;
      grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
      gap: 18px;
      align-items: stretch;
    }

    .diagnosis-box {
      padding: 24px;
      border-radius: var(--radius-xl);
      background: linear-gradient(145deg, #ffffff, #edf7ff);
      border: 1px solid rgba(220, 234, 247, .95);
      box-shadow: var(--shadow-soft);
    }

    .diagnosis-box p {
      color: var(--muted);
      margin: 10px 0 0;
    }

    .step-list {
      display: grid;
      gap: 12px;
      margin-top: 18px;
    }

    .step {
      display: grid;
      grid-template-columns: 36px 1fr;
      gap: 12px;
      align-items: start;
      padding: 13px;
      border-radius: 16px;
      background: rgba(255, 255, 255, .7);
      border: 1px solid rgba(220, 234, 247, .85);
    }

    .step span {
      width: 36px;
      height: 36px;
      border-radius: 13px;
      display: grid;
      place-items: center;
      background: #dff0ff;
      color: #195fae;
      font-weight: 850;
    }

    .step strong {
      display: block;
      color: #1d3655;
      margin-bottom: 2px;
    }

    .step em {
      display: block;
      color: var(--muted);
      font-style: normal;
      font-size: 14px;
    }

    .solution-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }

    .solution-card {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255, 255, 255, .78);
      border: 1px solid rgba(220, 234, 247, .95);
      box-shadow: 0 10px 24px rgba(65, 116, 168, .07);
    }

    .solution-card ul {
      margin: 12px 0 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 8px;
    }

    .solution-card li {
      position: relative;
      padding-left: 18px;
      color: #4d6078;
      font-size: 14px;
    }

    .solution-card li::before {
      content: "";
      position: absolute;
      left: 0;
      top: .72em;
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--mint);
    }

    .guard-band {
      border-radius: 32px;
      padding: 24px;
      background:
        linear-gradient(135deg, rgba(45, 127, 240, .1), rgba(119, 216, 210, .12)),
        rgba(255, 255, 255, .66);
      border: 1px solid rgba(220, 234, 247, .95);
      box-shadow: var(--shadow-soft);
    }

    .guard-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
    }

    .guard-card {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255, 255, 255, .82);
      border: 1px solid rgba(220, 234, 247, .95);
    }

    .policy-list {
      margin: 18px 0 0;
      padding: 0;
      list-style: none;
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
    }

    .policy-list li {
      padding: 12px 14px;
      border-radius: 15px;
      background: rgba(247, 251, 255, .9);
      border: 1px solid rgba(220, 234, 247, .9);
      color: #4a5f78;
      font-size: 14px;
    }

    .contact-layout {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr);
      gap: 18px;
      align-items: stretch;
    }

    .contact-card,
    .qr-card {
      padding: 24px;
      border-radius: var(--radius-xl);
      background: rgba(255, 255, 255, .84);
      border: 1px solid rgba(220, 234, 247, .95);
      box-shadow: var(--shadow-soft);
    }

    .contact-list {
      display: grid;
      gap: 12px;
      margin-top: 18px;
    }

    .contact-item {
      display: grid;
      grid-template-columns: 92px 1fr;
      gap: 12px;
      padding: 13px 14px;
      border-radius: 16px;
      background: var(--panel-blue);
      border: 1px solid rgba(220, 234, 247, .9);
    }

    .contact-item span {
      color: #6a7d93;
      font-size: 14px;
      font-weight: 700;
    }

    .contact-item strong,
    .contact-item a {
      color: #1c3657;
      font-weight: 760;
    }

    .map-link {
      color: #1f6bd8;
      text-decoration: none;
    }

    .qr-grid {
      display: grid;
      grid-template-columns: 164px 1fr;
      gap: 18px;
      align-items: center;
    }

    .qr-image {
      padding: 10px;
      border-radius: 22px;
      background: #ffffff;
      border: 1px solid var(--line);
      box-shadow: 0 10px 24px rgba(65, 116, 168, .1);
    }

    .qr-copy h3 {
      margin: 0 0 8px;
      color: #17375f;
      font-size: 20px;
    }

    .qr-copy p {
      margin: 0 0 12px;
      color: var(--muted);
      font-size: 14px;
    }

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

    .faq-item {
      border-radius: 20px;
      background: rgba(255, 255, 255, .82);
      border: 1px solid rgba(220, 234, 247, .95);
      overflow: hidden;
      box-shadow: 0 10px 22px rgba(65, 116, 168, .06);
    }

    .faq-question {
      width: 100%;
      padding: 18px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      border: 0;
      background: transparent;
      color: #1c3657;
      text-align: left;
      font-weight: 800;
      cursor: pointer;
    }

    .faq-question i {
      width: 26px;
      height: 26px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: #e7f3ff;
      color: var(--primary-deep);
      font-style: normal;
      flex: 0 0 auto;
      transition: transform .2s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 20px 18px;
      color: var(--muted);
      font-size: 15px;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

    .links-panel {
      padding: 22px;
      border-radius: var(--radius-xl);
      background: rgba(255, 255, 255, .72);
      border: 1px solid rgba(220, 234, 247, .95);
    }

    .links-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
      margin-top: 14px;
    }

    .links-grid a {
      padding: 12px 13px;
      border-radius: 14px;
      background: var(--panel-blue);
      border: 1px solid rgba(220, 234, 247, .9);
      color: #35506c;
      font-size: 14px;
      transition: color .2s ease, background .2s ease, transform .2s ease;
    }

    .links-grid a:hover {
      color: var(--primary-deep);
      background: #ffffff;
      transform: translateY(-2px);
    }

    .site-footer {
      margin-top: 18px;
      padding: 28px 0;
      background: #eaf4ff;
      border-top: 1px solid #d7e8f8;
      color: #1f2f46;
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .footer-inner p {
      margin: 0;
      color: #53687f;
      font-size: 14px;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .footer-links a {
      color: #24496f;
      font-size: 14px;
      font-weight: 700;
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity .55s ease, transform .55s ease;
    }

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

    @keyframes floatSoft {
      0%, 100% {
        transform: translateY(0);
      }
      50% {
        transform: translateY(-8px);
      }
    }

    .hero-card {
      animation: floatSoft 5.8s ease-in-out infinite;
    }

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

      *,
      *::before,
      *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
      }

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

    @media (max-width: 980px) {
      .menu-toggle {
        display: block;
      }

      .nav-links,
      .nav-cta {
        display: none;
      }

      .nav.open {
        flex-wrap: wrap;
      }

      .nav.open .nav-links {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
        order: 3;
        padding: 0 0 14px;
      }

      .nav.open .nav-cta {
        display: inline-flex;
        order: 4;
        width: 100%;
        margin-bottom: 14px;
      }

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

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

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

      .section-head p {
        max-width: none;
      }

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

    @media (max-width: 680px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

      .hero {
        padding-top: 34px;
      }

      .hero-actions,
      .footer-inner {
        flex-direction: column;
        align-items: stretch;
      }

      .btn {
        width: 100%;
      }

      .hero-notes,
      .services,
      .solution-grid,
      .guard-grid,
      .policy-list,
      .links-grid {
        grid-template-columns: 1fr;
      }

      .phone-showcase {
        grid-template-columns: 1fr;
      }

      .phone-frame.featured {
        grid-row: auto;
        min-height: 270px;
      }

      .phone-frame {
        min-height: 220px;
      }

      .qr-grid {
        grid-template-columns: 1fr;
      }

      .qr-image {
        width: min(220px, 100%);
      }

      .contact-item {
        grid-template-columns: 1fr;
        gap: 4px;
      }

      .footer-links {
        justify-content: flex-start;
      }
    }