:root {
      --theme: #0B3D91;
      --teal: #0891B2;
      --ink: #17212b;
      --muted: #61717d;
      --line: #dce7ec;
      --paper: #f5fafb;
      --white: #ffffff;
      --soft-teal: #e8f7fa;
      --shadow: 0 18px 46px rgba(15, 55, 72, .10);
      --radius: 8px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang HK", Arial, sans-serif;
      line-height: 1.65;
    }

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

    button {
      font: inherit;
    }

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

    .container {
      width: min(1180px, calc(100% - 40px));
      margin: 0 auto;
    }

    .topbar {
      color: #d9f5f8;
      background: #17212b;
      font-size: 13px;
    }

    .topbar .container {
      min-height: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .topbar-links {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .topbar a {
      color: #d9f5f8;
    }

    .topbar a:hover {
      color: #ffffff;
    }

    .header {
      position: relative;
      z-index: 20;
      background: var(--white);
      border-bottom: 1px solid var(--line);
    }

    .header-inner {
      min-height: 78px;
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      flex: 0 0 auto;
      color: var(--theme);
      font-size: 18px;
      font-weight: 800;
      white-space: nowrap;
    }

    .logo img {
      width: 34px;
      height: 34px;
      object-fit: contain;
    }

    .main-nav {
      flex: 1;
    }

    .nav-list {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 2px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .nav-item {
      position: relative;
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      min-height: 44px;
      padding: 0 12px;
      color: #354652;
      font-size: 14px;
      font-weight: 650;
      white-space: nowrap;
    }

    .nav-link:hover,
    .nav-link:focus-visible {
      color: var(--teal);
    }

    .has-arrow::after {
      content: "";
      width: 6px;
      height: 6px;
      margin: -3px 0 0 8px;
      border-right: 1.5px solid currentColor;
      border-bottom: 1.5px solid currentColor;
      transform: rotate(45deg);
    }

    .dropdown-panel,
    .mega-menu {
      position: absolute;
      top: calc(100% + 1px);
      left: 50%;
      width: 270px;
      padding: 16px;
      border: 1px solid var(--line);
      border-radius: 0 0 var(--radius) var(--radius);
      background: var(--white);
      box-shadow: var(--shadow);
      opacity: 0;
      visibility: hidden;
      transform: translate(-50%, 8px);
      transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
    }

    .mega-menu {
      width: min(660px, calc(100vw - 40px));
    }

    .nav-item:hover > .dropdown-panel,
    .nav-item:focus-within > .dropdown-panel,
    .nav-item:hover > .mega-menu,
    .nav-item:focus-within > .mega-menu {
      opacity: 1;
      visibility: visible;
      transform: translate(-50%, 0);
    }

    .dropdown-panel::before,
    .mega-menu::before {
      content: "";
      position: absolute;
      top: -12px;
      right: 0;
      left: 0;
      height: 12px;
    }

    .dropdown-panel > a:not(.mega-footer) {
      display: block;
      padding: 9px 4px;
      border-bottom: 1px solid var(--line);
      color: #3d5260;
      font-size: 14px;
    }

    .dropdown-panel > a:not(.mega-footer):hover,
    .mega-card:hover {
      color: var(--teal);
    }

    .mega-title {
      margin: 0 0 10px;
      color: var(--theme);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: .04em;
    }

    .mega-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 8px;
    }

    .mega-card {
      min-width: 0;
      display: grid;
      gap: 2px;
      padding: 10px;
      border: 1px solid var(--line);
      border-radius: 6px;
      color: #263a46;
      background: #fbfeff;
    }

    .mega-card img {
      width: 24px;
      height: 24px;
      object-fit: contain;
    }

    .mega-card strong,
    .mega-card small {
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .mega-card strong {
      font-size: 13px;
    }

    .mega-card small {
      color: var(--muted);
      font-size: 11px;
      line-height: 1.45;
    }

    .mega-footer {
      display: block;
      margin-top: 13px;
      padding-top: 11px;
      border-top: 1px solid var(--line);
      color: var(--theme);
      font-size: 13px;
      font-weight: 700;
    }

    .header-btns {
      display: flex;
      align-items: center;
      gap: 8px;
      flex: 0 0 auto;
    }

    .member-btn,
    .open-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 36px;
      padding: 0 13px;
      border-radius: 5px;
      font-size: 13px;
      font-weight: 700;
      white-space: nowrap;
    }

    .member-btn {
      color: var(--theme);
      border: 1px solid #b8d5e0;
      background: #f5fbfd;
    }

    .open-btn {
      color: var(--white);
      background: var(--theme);
    }

    .member-btn:hover,
    .open-btn:hover {
      opacity: .86;
    }

    .hamburger {
      display: none;
      width: 40px;
      height: 40px;
      padding: 8px;
      border: 1px solid var(--line);
      border-radius: 5px;
      background: var(--white);
      cursor: pointer;
    }

    .hamburger span {
      display: block;
      width: 22px;
      height: 2px;
      margin: 5px auto;
      background: var(--theme);
      transition: transform .2s ease, opacity .2s ease;
    }

    .hamburger.active span:first-child {
      transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active span:nth-child(2) {
      opacity: 0;
    }

    .hamburger.active span:last-child {
      transform: translateY(-7px) rotate(-45deg);
    }

    .drawer-overlay {
      position: fixed;
      inset: 0;
      z-index: 40;
      background: rgba(14, 29, 37, .48);
      opacity: 0;
      visibility: hidden;
      transition: opacity .2s ease, visibility .2s ease;
    }

    .drawer-overlay.open {
      opacity: 1;
      visibility: visible;
    }

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      z-index: 50;
      width: min(380px, 88vw);
      overflow-y: auto;
      background: var(--white);
      box-shadow: -16px 0 40px rgba(0, 0, 0, .16);
      transform: translateX(100%);
      transition: transform .25s ease;
    }

    .mobile-drawer.open {
      transform: translateX(0);
    }

    .drawer-head {
      display: flex;
      align-items: center;
      gap: 12px;
      min-height: 72px;
      padding: 0 20px;
      color: var(--theme);
      border-bottom: 1px solid var(--line);
      font-weight: 800;
    }

    .drawer-head > a {
      margin-left: auto;
      color: var(--teal);
      font-size: 14px;
    }

    .drawer-close {
      width: 34px;
      height: 34px;
      padding: 0;
      border: 1px solid var(--line);
      border-radius: 5px;
      color: var(--theme);
      background: #f5fbfd;
      font-size: 24px;
      line-height: 1;
      cursor: pointer;
    }

    .drawer-menu {
      padding: 12px 20px 28px;
    }

    .drawer-link,
    .drawer-toggle {
      display: flex;
      align-items: center;
      width: 100%;
      min-height: 48px;
      padding: 0;
      border: 0;
      border-bottom: 1px solid var(--line);
      color: #263b47;
      background: transparent;
      text-align: left;
      font-size: 15px;
      cursor: pointer;
    }

    .drawer-toggle::after {
      content: "+";
      margin-left: auto;
      color: var(--teal);
      font-size: 20px;
      font-weight: 400;
    }

    .drawer-toggle.active::after {
      content: "−";
    }

    .drawer-submenu {
      display: grid;
      max-height: 0;
      overflow: hidden;
      padding-left: 14px;
      opacity: 0;
      transition: max-height .25s ease, opacity .25s ease;
    }

    .drawer-submenu.open {
      max-height: 700px;
      opacity: 1;
    }

    .drawer-submenu a {
      padding: 9px 0;
      color: var(--muted);
      border-bottom: 1px solid #eef4f6;
      font-size: 13px;
    }

    .footer {
      margin-top: 0;
      color: #c8d9df;
      background: #17212b;
    }

    .footer .container {
      padding-top: 52px;
      padding-bottom: 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 34px;
    }

    .footer-brand strong {
      display: block;
      margin-bottom: 12px;
      color: #ffffff;
      font-size: 18px;
    }

    .footer p {
      margin: 0 0 12px;
      color: #b6cbd2;
      font-size: 13px;
    }

    .footer h3 {
      margin: 0 0 12px;
      color: #ffffff;
      font-size: 14px;
    }

    .footer-grid > div:not(.footer-brand) a,
    .footer-grid > div:not(.footer-brand) span {
      display: block;
      margin-bottom: 7px;
      color: #b6cbd2;
      font-size: 13px;
    }

    .footer-grid a:hover {
      color: #75d8e5;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      margin-top: 34px;
      padding-top: 17px;
      border-top: 1px solid rgba(218, 242, 247, .16);
      color: #91aab3;
      font-size: 12px;
    }

    .about-page {
      overflow: hidden;
    }

    .about-intro {
      padding: 82px 0 70px;
      background:
        linear-gradient(180deg, rgba(232, 247, 250, .9), rgba(245, 250, 251, .98)),
        repeating-linear-gradient(90deg, transparent 0, transparent 79px, rgba(8, 145, 178, .05) 80px);
    }

    .about-intro-inner {
      max-width: 820px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      margin: 0 0 15px;
      color: var(--teal);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: .08em;
    }

    .eyebrow::before {
      content: "";
      width: 28px;
      height: 2px;
      background: var(--teal);
    }

    .about-intro h1 {
      max-width: 760px;
      margin: 0 0 20px;
      color: var(--ink);
      font-size: clamp(34px, 5vw, 62px);
      line-height: 1.12;
      letter-spacing: 0;
    }

    .about-intro h1 span {
      color: var(--theme);
    }

    .about-intro p {
      max-width: 680px;
      margin: 0;
      color: var(--muted);
      font-size: 18px;
    }

    .about-section {
      padding: 78px 0;
    }

    .about-section.alt {
      background: var(--white);
    }

    .section-heading {
      max-width: 680px;
      margin-bottom: 34px;
    }

    .section-heading h2 {
      margin: 0 0 10px;
      color: var(--ink);
      font-size: clamp(26px, 3vw, 38px);
      line-height: 1.2;
    }

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

    .mission-layout {
      display: grid;
      grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr);
      gap: 48px;
      align-items: start;
    }

    .mission-copy p {
      margin: 0 0 18px;
      color: #51646e;
    }

    .principles {
      display: grid;
      gap: 12px;
    }

    .principle {
      display: grid;
      grid-template-columns: 42px 1fr;
      gap: 14px;
      padding: 18px;
      border: 1px solid var(--line);
      border-left: 3px solid var(--teal);
      border-radius: var(--radius);
      background: #fbfeff;
    }

    .principle-icon {
      display: grid;
      width: 38px;
      height: 38px;
      place-items: center;
      border-radius: 50%;
      color: var(--white);
      background: var(--theme);
      font-size: 14px;
      font-weight: 800;
    }

    .principle h3 {
      margin: 0 0 3px;
      color: var(--ink);
      font-size: 16px;
    }

    .principle p {
      margin: 0;
      color: var(--muted);
      font-size: 13px;
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 16px;
    }

    .service-card {
      min-height: 220px;
      padding: 23px 20px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--white);
    }

    .service-number {
      display: block;
      margin-bottom: 30px;
      color: var(--teal);
      font-size: 13px;
      font-weight: 800;
    }

    .service-card h3 {
      margin: 0 0 8px;
      color: var(--ink);
      font-size: 17px;
    }

    .service-card p {
      margin: 0;
      color: var(--muted);
      font-size: 13px;
    }

    .trust-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1px;
      overflow: hidden;
      border: 1px solid #b7dce4;
      border-radius: var(--radius);
      background: #b7dce4;
    }

    .trust-item {
      padding: 28px 24px;
      background: #f7fdfe;
    }

    .trust-item strong {
      display: block;
      margin-bottom: 6px;
      color: var(--theme);
      font-size: 28px;
      line-height: 1.2;
    }

    .trust-item span {
      color: var(--muted);
      font-size: 13px;
    }

    .about-cta {
      padding: 66px 0;
      color: var(--white);
      background: var(--theme);
    }

    .about-cta-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
    }

    .about-cta h2 {
      margin: 0 0 8px;
      font-size: 30px;
      line-height: 1.25;
    }

    .about-cta p {
      max-width: 630px;
      margin: 0;
      color: #d4e9f0;
    }

    .cta-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 45px;
      padding: 0 20px;
      border-radius: 5px;
      color: var(--theme);
      background: var(--white);
      font-size: 14px;
      font-weight: 800;
      white-space: nowrap;
    }

    .cta-button:hover {
      background: #dff6f8;
    }

    @media (max-width: 1040px) {
      .main-nav {
        display: none;
      }

      .hamburger {
        display: block;
      }

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

    @media (max-width: 760px) {
      .container {
        width: min(100% - 28px, 620px);
      }

      .topbar .container {
        align-items: flex-start;
        flex-direction: column;
        gap: 3px;
        padding-top: 8px;
        padding-bottom: 8px;
      }

      .topbar-links {
        gap: 12px;
        flex-wrap: wrap;
      }

      .header-inner {
        min-height: 68px;
        gap: 10px;
      }

      .member-btn {
        display: none;
      }

      .about-intro {
        padding: 58px 0 52px;
      }

      .about-intro p {
        font-size: 16px;
      }

      .about-section {
        padding: 56px 0;
      }

      .mission-layout,
      .service-grid,
      .trust-strip {
        grid-template-columns: 1fr;
      }

      .service-card {
        min-height: 0;
      }

      .service-number {
        margin-bottom: 18px;
      }

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

      .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 28px 20px;
      }

      .footer-brand {
        grid-column: 1 / -1;
      }

      .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
      }
    }

    @media (max-width: 440px) {
      .open-btn {
        display: none;
      }

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

      .footer-brand {
        grid-column: auto;
      }

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