:root {
      --theme: #0B3D91;
      --theme-config: {主题色};
      --theme-dark: #082b66;
      --theme-soft: #eaf1fc;
      --ink: #172033;
      --muted: #667085;
      --line: #dfe5ee;
      --surface: #ffffff;
      --page: #f5f7fa;
      --success: #16836b;
      --warning: #c77a12;
      --radius: 6px;
      --shadow: 0 14px 36px rgba(22, 32, 51, .09);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      color: var(--ink);
      background: var(--page);
      font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
      line-height: 1.65;
    }

    body,
    button,
    input {
      font-size: 15px;
    }

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

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

    button {
      color: inherit;
      font-family: inherit;
    }

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

    .topbar {
      color: #dce8ff;
      background: #071b3a;
      font-size: 13px;
    }

    .topbar .container {
      min-height: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .topbar a {
      margin-left: 22px;
      color: #dce8ff;
    }

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

    .header {
      position: relative;
      z-index: 50;
      background: rgba(255, 255, 255, .98);
      border-bottom: 1px solid var(--line);
    }

    .header-inner {
      min-height: 76px;
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .logo {
      min-width: 178px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--theme-dark);
      font-size: 19px;
      font-weight: 800;
      white-space: nowrap;
    }

    .logo img {
      width: 40px;
      height: 40px;
      object-fit: contain;
    }

    .main-nav {
      flex: 1;
      align-self: stretch;
    }

    .nav-list {
      height: 100%;
      margin: 0;
      padding: 0;
      display: flex;
      align-items: stretch;
      justify-content: center;
      list-style: none;
    }

    .nav-item {
      position: static;
      display: flex;
      align-items: center;
    }

    .nav-link {
      height: 100%;
      padding: 0 13px;
      display: inline-flex;
      align-items: center;
      color: #263247;
      font-size: 14px;
      font-weight: 650;
      white-space: nowrap;
    }

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

    .has-arrow::after {
      width: 6px;
      height: 6px;
      margin: -4px 0 0 8px;
      border-right: 1.5px solid currentColor;
      border-bottom: 1.5px solid currentColor;
      content: "";
      transform: rotate(45deg);
    }

    .dropdown-panel,
    .mega-menu {
      position: absolute;
      top: 100%;
      z-index: 60;
      visibility: hidden;
      opacity: 0;
      pointer-events: none;
      transform: translateY(8px);
      transition: opacity .18s ease, transform .18s ease, visibility .18s;
    }

    .dropdown-panel::before,
    .mega-menu::before {
      position: absolute;
      right: 0;
      bottom: 100%;
      left: 0;
      height: 12px;
      content: "";
    }

    .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;
      pointer-events: auto;
      transform: translateY(0);
    }

    .dropdown-panel {
      top: calc(100% - 1px);
      width: 320px;
      margin-left: -30px;
      padding: 10px;
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    .dropdown-panel > a:not(.mega-footer) {
      padding: 10px 12px;
      display: block;
      overflow: hidden;
      color: #344054;
      border-radius: 4px;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .dropdown-panel > a:not(.mega-footer):hover {
      color: var(--theme);
      background: var(--theme-soft);
    }

    .mega-menu {
      top: calc(100% - 1px);
      right: 20px;
      left: 20px;
      max-width: 1160px;
      margin: 0 auto;
      overflow: hidden;
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    .mega-grid {
      padding: 24px;
      display: grid;
      grid-template-columns: 230px minmax(0, 1fr);
      gap: 26px;
    }

    .mega-grid h4 {
      margin: 0 0 9px;
      color: var(--theme-dark);
      font-size: 16px;
    }

    .mega-grid p {
      margin: 0 0 14px;
      color: var(--muted);
      font-size: 13px;
    }

    .mega-grid > div:first-child > a {
      margin: 0 14px 8px 0;
      display: inline-block;
      color: var(--theme);
      font-size: 13px;
      font-weight: 700;
    }

    .mega-cards {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
    }

    .mega-card {
      min-width: 0;
      min-height: 76px;
      padding: 12px;
      display: grid;
      grid-template-columns: auto minmax(0, 1fr);
      align-content: center;
      gap: 3px 9px;
      border: 1px solid var(--line);
      border-radius: 5px;
      transition: border-color .18s ease, background .18s ease;
    }

    .mega-card:hover {
      border-color: #9bb6df;
      background: #f8faff;
    }

    .mega-card img {
      width: 28px;
      height: 28px;
      grid-row: 1 / 3;
      object-fit: contain;
    }

    .mega-card b,
    .mega-card small {
      min-width: 0;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .mega-card b {
      color: #263247;
      font-size: 13px;
    }

    .mega-card small {
      color: var(--muted);
      font-size: 12px;
    }

    .mega-footer {
      padding: 11px 24px;
      display: block;
      color: var(--theme);
      background: #f7f9fc;
      border-top: 1px solid var(--line);
      font-size: 13px;
      font-weight: 750;
      text-align: right;
    }

    .header-btns {
      display: flex;
      align-items: center;
      gap: 8px;
      white-space: nowrap;
    }

    .member-btn {
      display: inline-flex;
      align-items: center;
    }

    .member-btn a,
    .open-btn {
      min-height: 38px;
      padding: 7px 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 4px;
      font-size: 13px;
      font-weight: 750;
    }

    .member-btn a {
      color: var(--theme);
      border: 1px solid #b8c9e5;
    }

    .open-btn {
      color: #ffffff;
      background: var(--theme);
      border: 1px solid var(--theme);
    }

    .member-btn a:hover {
      background: var(--theme-soft);
    }

    .open-btn:hover {
      background: var(--theme-dark);
    }

    .hamburger {
      width: 42px;
      height: 42px;
      padding: 10px;
      display: none;
      border: 1px solid var(--line);
      border-radius: 4px;
      background: #ffffff;
      cursor: pointer;
    }

    .hamburger span {
      width: 100%;
      height: 2px;
      margin: 4px 0;
      display: block;
      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: 80;
      visibility: hidden;
      opacity: 0;
      background: rgba(5, 15, 34, .58);
      transition: opacity .22s ease, visibility .22s;
    }

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

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      z-index: 90;
      width: min(390px, 90vw);
      overflow-y: auto;
      background: #ffffff;
      box-shadow: -18px 0 40px rgba(10, 25, 52, .2);
      transform: translateX(102%);
      transition: transform .24s ease;
    }

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

    .drawer-head {
      min-height: 72px;
      padding: 14px 18px;
      display: flex;
      align-items: center;
      gap: 10px;
      border-bottom: 1px solid var(--line);
    }

    .drawer-head > a,
    .drawer-head > span a {
      padding: 7px 11px;
      color: var(--theme);
      border: 1px solid #b8c9e5;
      border-radius: 4px;
      font-weight: 700;
    }

    .drawer-close {
      width: 38px;
      height: 38px;
      margin-left: auto;
      padding: 0;
      color: #344054;
      background: #f3f5f8;
      border: 0;
      border-radius: 4px;
      font-size: 28px;
      line-height: 1;
      cursor: pointer;
    }

    .drawer-menu {
      padding: 10px 18px 28px;
    }

    .drawer-link,
    .drawer-toggle {
      width: 100%;
      min-height: 48px;
      padding: 12px 4px;
      display: flex;
      align-items: center;
      color: #24324a;
      background: none;
      border: 0;
      border-bottom: 1px solid #edf0f5;
      font-weight: 750;
      text-align: left;
      cursor: pointer;
    }

    .drawer-toggle::after {
      width: 7px;
      height: 7px;
      margin-left: auto;
      border-right: 1.5px solid currentColor;
      border-bottom: 1.5px solid currentColor;
      content: "";
      transform: rotate(45deg);
      transition: transform .2s ease;
    }

    .drawer-toggle.active::after {
      transform: rotate(225deg);
    }

    .drawer-submenu {
      max-height: 0;
      overflow: hidden;
      background: #f7f9fc;
      transition: max-height .3s ease;
    }

    .drawer-submenu.open {
      max-height: 720px;
    }

    .drawer-submenu a {
      padding: 9px 14px;
      display: block;
      color: #526077;
      border-bottom: 1px solid #e8ecf2;
      font-size: 13px;
    }

    .target-page-main.download-page-main {
      min-width: 0;
      overflow: hidden;
    }

    .download-page-main .download-intro {
      position: relative;
      color: #ffffff;
      background:
        linear-gradient(rgba(5, 27, 66, .94), rgba(9, 48, 111, .96)),
        #092f6e;
      border-bottom: 1px solid rgba(255, 255, 255, .12);
    }

    .download-page-main .download-intro::after {
      position: absolute;
      right: 8%;
      bottom: 24px;
      width: 250px;
      height: 126px;
      opacity: .16;
      background-image:
        linear-gradient(rgba(255,255,255,.65) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.65) 1px, transparent 1px);
      background-size: 25px 25px;
      content: "";
      transform: perspective(260px) rotateX(58deg);
      transform-origin: bottom;
    }

    .download-page-main .intro-inner {
      position: relative;
      z-index: 1;
      min-height: 330px;
      padding-top: 62px;
      padding-bottom: 58px;
    }

    .download-page-main .eyebrow {
      margin: 0 0 12px;
      color: #accbff;
      font-size: 13px;
      font-weight: 800;
    }

    .download-page-main h1 {
      max-width: 760px;
      margin: 0;
      font-size: clamp(34px, 5vw, 54px);
      line-height: 1.18;
      letter-spacing: 0;
    }

    .download-page-main .intro-copy {
      max-width: 720px;
      margin: 20px 0 0;
      color: #dbe8ff;
      font-size: 17px;
    }

    .download-page-main .intro-actions {
      margin-top: 28px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .download-page-main .primary-action,
    .download-page-main .secondary-action {
      min-height: 46px;
      padding: 10px 20px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 4px;
      font-weight: 800;
    }

    .download-page-main .primary-action {
      color: var(--theme-dark);
      background: #ffffff;
    }

    .download-page-main .secondary-action {
      color: #ffffff;
      border: 1px solid rgba(255,255,255,.45);
    }

    .download-page-main .download-nav {
      background: #ffffff;
      border-bottom: 1px solid var(--line);
    }

    .download-page-main .download-nav .container {
      min-height: 62px;
      display: flex;
      align-items: center;
      gap: 32px;
      overflow-x: auto;
    }

    .download-page-main .download-nav a {
      color: #526077;
      font-size: 14px;
      font-weight: 750;
      white-space: nowrap;
    }

    .download-page-main .download-nav a:hover {
      color: var(--theme);
    }

    .download-page-main .content-band {
      padding: 68px 0;
    }

    .download-page-main .content-band.alt {
      background: #ffffff;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .download-page-main .section-heading {
      max-width: 720px;
      margin-bottom: 30px;
    }

    .download-page-main .section-heading span {
      color: var(--theme);
      font-size: 13px;
      font-weight: 850;
    }

    .download-page-main .section-heading h2 {
      margin: 6px 0 8px;
      color: #16233a;
      font-size: 30px;
      line-height: 1.3;
      letter-spacing: 0;
    }

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

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

    .download-page-main .platform-card {
      min-width: 0;
      padding: 25px;
      background: #ffffff;
      border: 1px solid var(--line);
      border-top: 3px solid var(--theme);
      border-radius: var(--radius);
      box-shadow: 0 7px 22px rgba(28, 42, 68, .05);
    }

    .download-page-main .platform-icon {
      width: 48px;
      height: 48px;
      display: grid;
      place-items: center;
      color: #ffffff;
      background: var(--theme);
      border-radius: 6px;
      font-size: 20px;
      font-weight: 850;
    }

    .download-page-main .platform-card h3 {
      margin: 18px 0 8px;
      font-size: 20px;
    }

    .download-page-main .platform-card p {
      min-height: 76px;
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .download-page-main .platform-meta {
      margin: 17px 0;
      padding: 12px 0;
      display: grid;
      gap: 6px;
      color: #475467;
      border-top: 1px solid #edf0f5;
      border-bottom: 1px solid #edf0f5;
      font-size: 13px;
    }

    .download-page-main .card-action {
      width: 100%;
      min-height: 42px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      background: var(--theme);
      border-radius: 4px;
      font-weight: 800;
    }

    .download-page-main .card-action:hover {
      background: var(--theme-dark);
    }

    .download-page-main .steps {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 0;
      counter-reset: download-step;
    }

    .download-page-main .step {
      position: relative;
      min-width: 0;
      padding: 0 26px 0 0;
      counter-increment: download-step;
    }

    .download-page-main .step:not(:last-child)::after {
      position: absolute;
      top: 22px;
      right: 12px;
      left: 58px;
      height: 1px;
      background: #bdc9db;
      content: "";
    }

    .download-page-main .step-number {
      position: relative;
      z-index: 1;
      width: 45px;
      height: 45px;
      display: grid;
      place-items: center;
      color: #ffffff;
      background: var(--theme);
      border: 5px solid #eaf1fc;
      border-radius: 50%;
      font-size: 13px;
      font-weight: 850;
    }

    .download-page-main .step-number::before {
      content: counter(download-step, decimal-leading-zero);
    }

    .download-page-main .step h3 {
      margin: 18px 0 7px;
      font-size: 17px;
    }

    .download-page-main .step p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .download-page-main .security-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #ffffff;
    }

    .download-page-main .security-item {
      padding: 26px;
    }

    .download-page-main .security-item + .security-item {
      border-left: 1px solid var(--line);
    }

    .download-page-main .security-item b {
      display: block;
      color: var(--theme-dark);
      font-size: 17px;
    }

    .download-page-main .security-item p {
      margin: 8px 0 0;
      color: var(--muted);
      font-size: 14px;
    }

    .download-page-main .faq-list {
      max-width: 900px;
      border-top: 1px solid var(--line);
    }

    .download-page-main details {
      border-bottom: 1px solid var(--line);
      background: #ffffff;
    }

    .download-page-main summary {
      min-height: 62px;
      padding: 17px 48px 17px 18px;
      position: relative;
      color: #25324a;
      font-weight: 800;
      cursor: pointer;
      list-style: none;
    }

    .download-page-main summary::-webkit-details-marker {
      display: none;
    }

    .download-page-main summary::after {
      position: absolute;
      top: 50%;
      right: 19px;
      color: var(--theme);
      content: "+";
      font-size: 22px;
      transform: translateY(-50%);
    }

    .download-page-main details[open] summary::after {
      content: "−";
    }

    .download-page-main details p {
      margin: 0;
      padding: 0 48px 20px 18px;
      color: var(--muted);
    }

    .download-page-main .support-strip {
      padding: 34px 0;
      color: #ffffff;
      background: var(--theme);
    }

    .download-page-main .support-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
    }

    .download-page-main .support-inner h2 {
      margin: 0 0 5px;
      font-size: 24px;
    }

    .download-page-main .support-inner p {
      margin: 0;
      color: #dce9ff;
    }

    .download-page-main .support-inner a {
      min-height: 44px;
      padding: 9px 18px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex: 0 0 auto;
      color: var(--theme-dark);
      background: #ffffff;
      border-radius: 4px;
      font-weight: 850;
    }

    .footer {
      padding-top: 52px;
      color: #cbd5e6;
      background: #09162b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr .9fr .9fr 1.2fr;
      gap: 38px;
    }

    .footer h4 {
      margin: 0 0 15px;
      color: #ffffff;
      font-size: 15px;
    }

    .footer strong {
      color: #ffffff;
      font-size: 20px;
    }

    .footer p {
      margin: 8px 0;
      color: #aebbd0;
      font-size: 13px;
    }

    .footer-grid > div > a {
      margin: 0 0 9px;
      display: block;
      color: #cbd5e6;
      font-size: 13px;
    }

    .footer-grid > div > a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      min-height: 68px;
      margin-top: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      color: #8f9db3;
      border-top: 1px solid rgba(255, 255, 255, .1);
      font-size: 12px;
    }

    @media (max-width: 1080px) {
      .main-nav {
        display: none;
      }

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

      .logo {
        margin-right: auto;
      }

      .hamburger {
        display: block;
      }

      .download-page-main .platform-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .download-page-main .platform-card:last-child {
        grid-column: 1 / -1;
      }

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

    @media (max-width: 760px) {
      .container {
        width: min(100% - 28px, 1180px);
      }

      .topbar .container {
        padding: 7px 0;
        align-items: flex-start;
        flex-direction: column;
        gap: 2px;
      }

      .topbar a {
        margin: 0 14px 0 0;
        display: inline-block;
      }

      .logo {
        min-width: 0;
        font-size: 16px;
      }

      .logo img {
        width: 35px;
        height: 35px;
      }

      .member-btn {
        display: none;
      }

      .open-btn {
        min-height: 38px;
        padding: 7px 11px;
      }

      .download-page-main .intro-inner {
        min-height: 300px;
        padding-top: 46px;
        padding-bottom: 48px;
      }

      .download-page-main .intro-copy {
        font-size: 15px;
      }

      .download-page-main .content-band {
        padding: 50px 0;
      }

      .download-page-main .section-heading h2 {
        font-size: 25px;
      }

      .download-page-main .platform-grid,
      .download-page-main .security-grid {
        grid-template-columns: 1fr;
      }

      .download-page-main .platform-card:last-child {
        grid-column: auto;
      }

      .download-page-main .platform-card p {
        min-height: 0;
      }

      .download-page-main .steps {
        grid-template-columns: 1fr;
        gap: 26px;
      }

      .download-page-main .step {
        padding-left: 60px;
      }

      .download-page-main .step-number {
        position: absolute;
        top: 0;
        left: 0;
      }

      .download-page-main .step h3 {
        margin-top: 0;
      }

      .download-page-main .step:not(:last-child)::after {
        top: 45px;
        bottom: -26px;
        left: 22px;
        width: 1px;
        height: auto;
      }

      .download-page-main .security-item + .security-item {
        border-top: 1px solid var(--line);
        border-left: 0;
      }

      .download-page-main .support-inner {
        align-items: flex-start;
        flex-direction: column;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 26px;
      }

      .footer-bottom {
        padding: 18px 0;
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
      }
    }

    @media (max-width: 430px) {
      .header-inner {
        gap: 8px;
      }

      .logo span {
        max-width: 120px;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .open-btn {
        font-size: 12px;
      }

      .download-page-main .intro-actions {
        align-items: stretch;
        flex-direction: column;
      }

      .download-page-main .primary-action,
      .download-page-main .secondary-action {
        width: 100%;
      }
    }