:root {
      --theme: #0B3D91;
      --theme-dark: #07285f;
      --ink: #10233f;
      --muted: #64748b;
      --line: #dbe4ef;
      --soft: #f4f7fb;
      --white: #ffffff;
      --accent: #20c7c9;
      --shadow: 0 18px 50px rgba(16, 35, 63, .1);
      --radius: 8px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      color: var(--ink);
      background: #f7f9fc;
      font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
      line-height: 1.7;
    }

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

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

    button {
      font: inherit;
    }

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

    .topbar {
      background: #071936;
      color: #cbd8ec;
      font-size: 13px;
    }

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

    .topbar-links {
      display: flex;
      align-items: center;
      gap: 22px;
    }

    .topbar a {
      color: #dce8f8;
    }

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

    .header-inner {
      min-height: 76px;
      display: flex;
      align-items: center;
      gap: 34px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      flex: 0 0 auto;
      color: var(--theme-dark);
      font-size: 19px;
      font-weight: 800;
      white-space: nowrap;
    }

    .logo img {
      width: 38px;
      height: 38px;
      object-fit: contain;
    }

    .main-nav {
      flex: 1;
    }

    .nav-list {
      padding: 0;
      margin: 0;
      display: flex;
      align-items: stretch;
      justify-content: center;
      gap: 4px;
      list-style: none;
    }

    .nav-item {
      position: relative;
    }

    .nav-link {
      min-height: 76px;
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 0 13px;
      color: #33445c;
      font-size: 14px;
      white-space: nowrap;
    }

    .nav-link:hover,
    .nav-link:focus-visible,
    .nav-item:focus-within > .nav-link {
      color: var(--theme);
    }

    .has-arrow::after {
      content: "";
      width: 6px;
      height: 6px;
      border-right: 1px solid currentColor;
      border-bottom: 1px solid currentColor;
      transform: rotate(45deg) translateY(-2px);
    }

    .dropdown-panel,
    .mega-menu {
      position: absolute;
      top: calc(100% - 1px);
      left: 50%;
      z-index: 25;
      visibility: hidden;
      opacity: 0;
      transform: translate(-50%, 8px);
      transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
      background: var(--white);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .dropdown-panel {
      width: 280px;
      padding: 18px;
    }

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

    .dropdown-title,
    .mega-heading {
      margin-bottom: 10px;
      color: var(--theme);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: .08em;
    }

    .dropdown-panel a {
      display: block;
      padding: 8px 0;
      border-bottom: 1px solid #edf1f6;
      color: #40516a;
      font-size: 13px;
    }

    .dropdown-panel a:last-child {
      margin-top: 7px;
      border: 0;
      color: var(--theme);
      font-weight: 700;
    }

    .mega-menu {
      width: 690px;
      padding: 25px;
    }

    .mega-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .mega-list {
      display: grid;
      gap: 7px;
    }

    .mega-list a {
      min-width: 0;
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 8px;
      border: 1px solid transparent;
    }

    .mega-list a:hover {
      border-color: var(--line);
      background: var(--soft);
    }

    .mega-list img {
      width: 34px;
      height: 34px;
      flex: 0 0 34px;
      object-fit: contain;
      border-radius: 5px;
      background: #eef3fa;
    }

    .mega-list a > span {
      min-width: 0;
    }

    .mega-item-title,
    .mega-item-meta {
      display: block;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .mega-item-title {
      color: var(--ink);
      font-size: 13px;
      font-weight: 700;
    }

    .mega-item-meta {
      max-width: 260px;
      color: var(--muted);
      font-size: 11px;
    }

    .mega-categories {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .mega-categories a,
    .mega-tools span {
      padding: 6px 10px;
      border: 1px solid var(--line);
      border-radius: 4px;
      color: #50627a;
      font-size: 12px;
    }

    .mega-footer {
      display: inline-block;
      margin-top: 18px;
      color: var(--theme);
      font-size: 13px;
      font-weight: 700;
    }

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

    .mega-tools {
      display: flex;
      flex-wrap: wrap;
      gap: 7px;
    }

    .header-btns {
      display: flex;
      align-items: center;
      gap: 12px;
      flex: 0 0 auto;
    }

    .member-link {
      color: var(--theme);
      font-size: 13px;
      font-weight: 700;
    }

    .account-btn {
      padding: 9px 15px;
      border-radius: 5px;
      background: var(--theme);
      color: #fff;
      font-size: 13px;
      font-weight: 700;
    }

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

    .hamburger span {
      display: block;
      width: 21px;
      height: 2px;
      margin: 4px auto;
      background: var(--ink);
      transition: transform .2s ease, opacity .2s ease;
    }

    .hamburger.active span:nth-child(1) {
      transform: translateY(6px) rotate(45deg);
    }

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

    .hamburger.active span:nth-child(3) {
      transform: translateY(-6px) rotate(-45deg);
    }

    .drawer-overlay {
      position: fixed;
      inset: 0;
      z-index: 30;
      visibility: hidden;
      opacity: 0;
      background: rgba(3, 13, 30, .56);
      transition: opacity .25s ease, visibility .25s ease;
    }

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

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      z-index: 31;
      width: min(360px, 88vw);
      overflow-y: auto;
      visibility: hidden;
      transform: translateX(100%);
      background: #fff;
      box-shadow: -16px 0 40px rgba(7, 25, 54, .2);
      transition: transform .25s ease, visibility .25s ease;
    }

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

    .drawer-head {
      min-height: 72px;
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 16px 20px;
      border-bottom: 1px solid var(--line);
      color: var(--theme-dark);
      font-weight: 800;
    }

    .drawer-head > span {
      flex: 1;
    }

    .drawer-head a {
      padding: 6px 10px;
      border-radius: 4px;
      background: var(--theme);
      color: #fff;
      font-size: 12px;
    }

    .drawer-close {
      width: 32px;
      height: 32px;
      border: 0;
      background: transparent;
      color: var(--muted);
      font-size: 27px;
      line-height: 1;
      cursor: pointer;
    }

    .drawer-menu {
      padding: 10px 20px 30px;
    }

    .drawer-link,
    .drawer-toggle {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 0;
      border: 0;
      border-bottom: 1px solid #edf1f6;
      background: transparent;
      color: var(--ink);
      font-size: 15px;
      text-align: left;
      cursor: pointer;
    }

    .drawer-toggle::after {
      content: "+";
      color: var(--theme);
      font-size: 20px;
      font-weight: 300;
    }

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

    .drawer-submenu {
      display: none;
      padding: 5px 0 8px 14px;
      border-left: 2px solid #dbe7f8;
    }

    .drawer-submenu.open {
      display: block;
    }

    .drawer-submenu a {
      display: block;
      padding: 8px 0;
      color: var(--muted);
      font-size: 13px;
    }

    .about-page {
      background: #f7f9fc;
    }

    .about-hero {
      position: relative;
      overflow: hidden;
      padding: 88px 0 96px;
      background:
        linear-gradient(110deg, rgba(7, 25, 54, .96), rgba(11, 61, 145, .88)),
        url("{模板路径}/images/about-scene.jpg") center / cover;
      color: #fff;
    }

    .about-hero::after {
      content: "";
      position: absolute;
      right: 8%;
      bottom: -170px;
      width: 420px;
      height: 420px;
      border: 1px solid rgba(32, 199, 201, .28);
      border-radius: 50%;
      box-shadow: 0 0 0 34px rgba(32, 199, 201, .06), 0 0 0 68px rgba(32, 199, 201, .04);
    }

    .about-hero-content {
      position: relative;
      z-index: 1;
      max-width: 760px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      margin-bottom: 17px;
      color: #78e3e2;
      font-size: 12px;
      font-weight: 800;
      letter-spacing: .14em;
    }

    .eyebrow::before {
      content: "";
      width: 26px;
      height: 2px;
      background: var(--accent);
    }

    .about-hero h1 {
      max-width: 680px;
      margin: 0 0 18px;
      font-size: clamp(36px, 5vw, 66px);
      line-height: 1.15;
      letter-spacing: 0;
    }

    .about-hero p {
      max-width: 650px;
      margin: 0;
      color: #d9e6f7;
      font-size: 17px;
    }

    .about-intro {
      padding: 76px 0 30px;
    }

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

    .section-heading h2 {
      margin: 0 0 10px;
      color: var(--ink);
      font-size: 32px;
      line-height: 1.25;
    }

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

    .about-intro-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 56px;
      align-items: start;
    }

    .about-intro-copy p {
      margin: 0 0 18px;
      color: #52657e;
    }

    .about-facts {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }

    .fact-card {
      padding: 22px;
      border: 1px solid var(--line);
      border-top: 3px solid var(--theme);
      background: #fff;
      border-radius: var(--radius);
    }

    .fact-card strong {
      display: block;
      margin-bottom: 5px;
      color: var(--theme);
      font-size: 28px;
      line-height: 1.2;
    }

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

    .about-values {
      padding: 62px 0 78px;
      background: #fff;
    }

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

    .value-card {
      min-height: 220px;
      padding: 28px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
    }

    .value-index {
      display: block;
      margin-bottom: 23px;
      color: #9aabc0;
      font-size: 13px;
      font-weight: 800;
    }

    .value-card h3 {
      margin: 0 0 9px;
      font-size: 19px;
    }

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

    .about-process {
      padding: 78px 0 92px;
    }

    .timeline {
      position: relative;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .timeline::before {
      content: "";
      position: absolute;
      top: 15px;
      left: 0;
      right: 0;
      height: 1px;
      background: #c8d7e9;
    }

    .timeline-item {
      position: relative;
      padding-top: 44px;
    }

    .timeline-dot {
      position: absolute;
      top: 8px;
      left: 0;
      width: 15px;
      height: 15px;
      border: 4px solid #f7f9fc;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 1px var(--theme);
    }

    .timeline-item small {
      color: var(--theme);
      font-weight: 800;
    }

    .timeline-item h3 {
      margin: 8px 0 8px;
      font-size: 17px;
    }

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

    .about-cta {
      padding: 58px 0;
      background: var(--theme-dark);
      color: #fff;
    }

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

    .cta-inner h2 {
      margin: 0 0 8px;
      font-size: 26px;
    }

    .cta-inner p {
      margin: 0;
      color: #b9cae2;
    }

    .cta-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 150px;
      padding: 12px 20px;
      border-radius: 5px;
      background: var(--accent);
      color: #062544;
      font-size: 14px;
      font-weight: 800;
      white-space: nowrap;
    }

    .footer {
      padding: 54px 0 0;
      background: #071936;
      color: #b8c6da;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 35px;
      padding-bottom: 42px;
    }

    .footer-brand img {
      width: 42px;
      height: 42px;
      object-fit: contain;
      margin-bottom: 12px;
    }

    .footer h3,
    .footer h4 {
      margin: 0 0 13px;
      color: #fff;
    }

    .footer h3 {
      font-size: 18px;
    }

    .footer h4 {
      font-size: 14px;
    }

    .footer p {
      max-width: 270px;
      margin: 0;
      color: #8fa2bd;
      font-size: 13px;
    }

    .footer-links,
    .footer-contact {
      display: grid;
      gap: 8px;
      font-size: 13px;
    }

    .footer-links a:hover {
      color: #fff;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      padding: 18px 0;
      border-top: 1px solid rgba(203, 216, 236, .16);
      color: #8296b1;
      font-size: 12px;
    }

    @media (max-width: 980px) {
      .header-inner {
        gap: 18px;
      }

      .nav-link {
        padding: 0 8px;
      }

      .member-link {
        display: none;
      }

      .about-intro-grid {
        gap: 30px;
      }
    }

    @media (max-width: 760px) {
      .container {
        width: min(100% - 32px, 620px);
      }

      .topbar-inner {
        min-height: 44px;
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 0;
      }

      .topbar-links {
        display: none;
      }

      .header-inner {
        min-height: 66px;
        justify-content: space-between;
      }

      .main-nav {
        display: none;
      }

      .hamburger {
        display: block;
      }

      .about-hero {
        padding: 70px 0 76px;
      }

      .about-hero h1 {
        font-size: 40px;
      }

      .about-hero p {
        font-size: 15px;
      }

      .about-intro,
      .about-process {
        padding: 55px 0 25px;
      }

      .about-intro-grid,
      .value-grid,
      .timeline {
        grid-template-columns: 1fr;
      }

      .about-facts {
        grid-template-columns: repeat(2, 1fr);
      }

      .about-values {
        padding: 55px 0;
      }

      .timeline {
        gap: 27px;
      }

      .timeline::before {
        top: 0;
        bottom: 0;
        left: 7px;
        width: 1px;
        height: auto;
      }

      .timeline-item {
        padding: 0 0 0 35px;
      }

      .timeline-dot {
        top: 5px;
        left: 0;
      }

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

      .footer {
        padding-top: 42px;
      }

      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px 20px;
      }

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

    @media (max-width: 420px) {
      .about-facts {
        grid-template-columns: 1fr;
      }

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