:root {
      --theme: #0B3D91;
      --template-theme: {主题色};
      --theme-dark: #082d6d;
      --theme-soft: #eaf1fb;
      --accent: #d82478;
      --ink: #172033;
      --muted: #647086;
      --line: #dfe5ed;
      --surface: #ffffff;
      --background: #f4f6f9;
      --success: #16845b;
      --warning: #d98b16;
      --container: 1180px;
      --shadow: 0 14px 38px rgba(21, 38, 68, 0.09);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

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

    body.drawer-lock {
      overflow: hidden;
    }

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

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

    button,
    input {
      font: inherit;
    }

    button {
      color: inherit;
    }

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

    .topbar {
      color: #dce8fb;
      background: #092b63;
      font-size: 13px;
    }

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

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

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

    .header {
      position: relative;
      z-index: 50;
      background: rgba(255, 255, 255, 0.98);
      border-bottom: 1px solid var(--line);
    }

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

    .logo {
      min-width: 0;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--theme);
      font-size: 19px;
      font-weight: 800;
      white-space: nowrap;
    }

    .logo img {
      width: 42px;
      height: 42px;
      object-fit: contain;
    }

    .main-nav {
      flex: 1;
      min-width: 0;
    }

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

    .nav-item {
      position: relative;
    }

    .nav-link {
      min-height: 78px;
      padding: 0 14px;
      display: flex;
      align-items: center;
      color: #313b4e;
      font-size: 15px;
      font-weight: 600;
      white-space: nowrap;
    }

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

    .nav-link.active::after {
      content: "";
      position: absolute;
      right: 14px;
      bottom: 0;
      left: 14px;
      height: 3px;
      background: var(--theme);
    }

    .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: 100%;
      left: 0;
      z-index: 80;
      visibility: hidden;
      opacity: 0;
      transform: translateY(8px);
      transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
      background: var(--surface);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .dropdown-panel::before,
    .mega-menu::before {
      content: "";
      position: absolute;
      right: 0;
      bottom: 100%;
      left: 0;
      height: 10px;
    }

    .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: translateY(0);
    }

    .dropdown-panel {
      width: 270px;
      padding: 10px;
      border-radius: 0 0 6px 6px;
    }

    .dropdown-panel a {
      display: block;
      padding: 10px 12px;
      color: #3d4759;
      font-size: 14px;
      border-radius: 4px;
    }

    .dropdown-panel a:hover {
      color: var(--theme);
      background: var(--theme-soft);
    }

    .mega-menu {
      width: 660px;
      padding: 20px;
      border-radius: 0 0 6px 6px;
    }

    .mega-menu-wide {
      width: 760px;
    }

    .nav-item:nth-last-child(-n+3) .mega-menu {
      right: 0;
      left: auto;
    }

    .mega-head {
      margin-bottom: 14px;
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 18px;
    }

    .mega-head strong {
      color: var(--ink);
      font-size: 17px;
    }

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

    .mega-category-list {
      margin-bottom: 14px;
      padding-bottom: 14px;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      border-bottom: 1px solid var(--line);
    }

    .mega-category-list a {
      padding: 5px 10px;
      color: var(--theme);
      background: var(--theme-soft);
      border-radius: 4px;
      font-size: 13px;
    }

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

    .mega-card {
      min-width: 0;
      padding: 10px;
      display: flex;
      align-items: center;
      gap: 11px;
      border: 1px solid #e8ecf2;
      border-radius: 6px;
      transition: border-color 0.18s ease, background 0.18s ease;
    }

    .mega-card:hover {
      border-color: #b9c9e3;
      background: #f7faff;
    }

    .mega-card img {
      width: 48px;
      height: 48px;
      flex: 0 0 48px;
      object-fit: cover;
      border-radius: 4px;
      background: #edf1f6;
    }

    .mega-card-body {
      min-width: 0;
      display: block;
    }

    .mega-card-body strong,
    .mega-card-body p,
    .mega-card-body small {
      display: block;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .mega-card-body strong {
      color: #222d40;
      font-size: 14px;
    }

    .mega-card-body p,
    .mega-card-body small {
      margin: 2px 0 0;
      color: var(--muted);
      font-size: 12px;
    }

    .mega-footer {
      margin-top: 14px;
      padding: 10px 12px;
      display: block;
      color: var(--theme);
      background: var(--theme-soft);
      border-radius: 4px;
      text-align: center;
      font-size: 14px;
      font-weight: 700;
    }

    .header-btns {
      display: flex;
      align-items: center;
      gap: 9px;
      white-space: nowrap;
    }

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

    .account-entry {
      min-height: 38px;
      padding: 7px 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      background: var(--theme);
      border-radius: 4px;
      font-size: 14px;
      font-weight: 700;
    }

    .account-entry:hover {
      background: var(--theme-dark);
    }

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

    .hamburger span {
      width: 20px;
      height: 2px;
      margin: 4px 0;
      display: block;
      background: var(--ink);
      transition: transform 0.2s ease, opacity 0.2s 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: 90;
      visibility: hidden;
      opacity: 0;
      background: rgba(9, 20, 39, 0.56);
      transition: opacity 0.22s ease, visibility 0.22s;
    }

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

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      z-index: 100;
      width: min(390px, 90vw);
      height: 100vh;
      overflow-y: auto;
      background: #ffffff;
      box-shadow: -16px 0 40px rgba(9, 25, 51, 0.18);
      transform: translateX(102%);
      transition: transform 0.24s ease;
    }

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

    .drawer-head {
      min-height: 72px;
      padding: 14px 18px;
      display: flex;
      align-items: center;
      gap: 12px;
      border-bottom: 1px solid var(--line);
    }

    .drawer-head > a {
      padding: 7px 13px;
      color: #ffffff;
      background: var(--theme);
      border-radius: 4px;
      font-weight: 700;
    }

    .drawer-close {
      width: 38px;
      height: 38px;
      margin-left: auto;
      border: 1px solid var(--line);
      background: #ffffff;
      border-radius: 4px;
      font-size: 25px;
      line-height: 1;
      cursor: pointer;
    }

    .drawer-menu {
      padding: 10px 18px 30px;
    }

    .drawer-link,
    .drawer-toggle {
      width: 100%;
      min-height: 48px;
      padding: 12px 4px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border: 0;
      border-bottom: 1px solid var(--line);
      background: transparent;
      font-weight: 700;
      text-align: left;
      cursor: pointer;
    }

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

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

    .drawer-submenu {
      display: none;
      padding: 6px 0 10px 14px;
      border-bottom: 1px solid var(--line);
    }

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

    .drawer-submenu a {
      padding: 9px 6px;
      display: block;
      color: var(--muted);
      font-size: 14px;
    }

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

    .download-page-main .download-intro {
      padding: 68px 0 58px;
      color: #ffffff;
      background:
        linear-gradient(90deg, rgba(11, 61, 145, 0.98), rgba(8, 45, 109, 0.94)),
        #0B3D91;
    }

    .download-page-main .intro-inner {
      max-width: 850px;
      margin: 0 auto;
      text-align: center;
    }

    .download-page-main .intro-label {
      margin-bottom: 12px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: #ffffff;
      font-size: 14px;
      font-weight: 700;
    }

    .download-page-main .intro-label::before {
      content: "";
      width: 24px;
      height: 3px;
      background: var(--accent);
    }

    .download-page-main h1 {
      margin: 0;
      font-size: clamp(34px, 5vw, 56px);
      line-height: 1.16;
      letter-spacing: 0;
    }

    .download-page-main .intro-text {
      max-width: 720px;
      margin: 18px auto 0;
      color: #dbe7fa;
      font-size: 17px;
    }

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

    .download-page-main .primary-button,
    .download-page-main .secondary-button {
      min-height: 46px;
      padding: 10px 20px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 4px;
      font-weight: 700;
    }

    .download-page-main .primary-button {
      color: #ffffff;
      background: var(--accent);
    }

    .download-page-main .primary-button:hover {
      background: #bb1d66;
    }

    .download-page-main .secondary-button {
      color: #ffffff;
      border: 1px solid rgba(255, 255, 255, 0.55);
      background: rgba(255, 255, 255, 0.08);
    }

    .download-page-main .security-strip {
      margin-top: -22px;
      position: relative;
      z-index: 2;
    }

    .download-page-main .security-inner {
      padding: 17px 24px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 6px;
      box-shadow: var(--shadow);
    }

    .download-page-main .security-item {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .download-page-main .security-icon {
      width: 38px;
      height: 38px;
      flex: 0 0 38px;
      display: grid;
      place-items: center;
      color: var(--theme);
      background: var(--theme-soft);
      border-radius: 4px;
      font-weight: 800;
    }

    .download-page-main .security-item strong,
    .download-page-main .security-item span {
      display: block;
    }

    .download-page-main .security-item strong {
      font-size: 14px;
    }

    .download-page-main .security-item span {
      color: var(--muted);
      font-size: 12px;
    }

    .download-page-main .download-section {
      padding: 76px 0;
    }

    .download-page-main .download-section.alt {
      background: #ffffff;
    }

    .download-page-main .section-heading {
      max-width: 720px;
      margin: 0 auto 34px;
      text-align: center;
    }

    .download-page-main .section-heading span {
      color: var(--accent);
      font-size: 13px;
      font-weight: 800;
    }

    .download-page-main .section-heading h2 {
      margin: 7px 0 10px;
      color: var(--ink);
      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: 20px;
    }

    .download-page-main .platform-card {
      min-width: 0;
      padding: 26px;
      background: #ffffff;
      border: 1px solid var(--line);
      border-top: 4px solid var(--theme);
      border-radius: 6px;
      box-shadow: 0 8px 22px rgba(21, 38, 68, 0.05);
    }

    .download-page-main .platform-card:nth-child(2) {
      border-top-color: var(--accent);
    }

    .download-page-main .platform-card:nth-child(3) {
      border-top-color: var(--success);
    }

    .download-page-main .platform-mark {
      width: 52px;
      height: 52px;
      display: grid;
      place-items: center;
      color: #ffffff;
      background: var(--theme);
      border-radius: 6px;
      font-size: 20px;
      font-weight: 800;
    }

    .download-page-main .platform-card:nth-child(2) .platform-mark {
      background: var(--accent);
    }

    .download-page-main .platform-card:nth-child(3) .platform-mark {
      background: var(--success);
    }

    .download-page-main .platform-card h3 {
      margin: 18px 0 7px;
      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: 18px 0;
      padding: 12px 0;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      color: #536077;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
      font-size: 12px;
    }

    .download-page-main .card-button {
      width: 100%;
      min-height: 42px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--theme);
      background: var(--theme-soft);
      border-radius: 4px;
      font-weight: 700;
    }

    .download-page-main .card-button:hover {
      color: #ffffff;
      background: var(--theme);
    }

    .download-page-main .steps {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 28px;
      counter-reset: install-step;
    }

    .download-page-main .step {
      position: relative;
      padding: 26px 24px;
      background: var(--background);
      border: 1px solid var(--line);
      border-radius: 6px;
      counter-increment: install-step;
    }

    .download-page-main .step::before {
      content: "0" counter(install-step);
      margin-bottom: 20px;
      display: block;
      color: var(--theme);
      font-size: 28px;
      font-weight: 800;
      line-height: 1;
    }

    .download-page-main .step:not(:last-child)::after {
      content: "";
      position: absolute;
      top: 42px;
      left: calc(100% + 8px);
      width: 12px;
      border-top: 2px solid #a9bad4;
    }

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

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

    .download-page-main .notice {
      margin-top: 30px;
      padding: 18px 20px;
      display: flex;
      gap: 14px;
      color: #6d4a10;
      background: #fff8e8;
      border: 1px solid #f2d89d;
      border-radius: 6px;
    }

    .download-page-main .notice strong {
      flex: 0 0 auto;
    }

    .download-page-main .notice p {
      margin: 0;
    }

    .download-page-main .faq-list {
      max-width: 850px;
      margin: 0 auto;
      border-top: 1px solid var(--line);
    }

    .download-page-main .faq-item {
      border-bottom: 1px solid var(--line);
    }

    .download-page-main .faq-question {
      width: 100%;
      padding: 20px 4px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      border: 0;
      background: transparent;
      font-weight: 700;
      text-align: left;
      cursor: pointer;
    }

    .download-page-main .faq-question::after {
      content: "+";
      color: var(--theme);
      font-size: 24px;
      font-weight: 400;
    }

    .download-page-main .faq-question.active::after {
      content: "−";
    }

    .download-page-main .faq-answer {
      display: none;
      padding: 0 36px 20px 4px;
      color: var(--muted);
    }

    .download-page-main .faq-answer.open {
      display: block;
    }

    .download-page-main .faq-answer p {
      margin: 0;
    }

    .download-page-main .final-cta {
      padding: 0 0 78px;
    }

    .download-page-main .final-cta-inner {
      padding: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
      color: #ffffff;
      background: #14233b;
      border-left: 5px solid var(--accent);
      border-radius: 6px;
    }

    .download-page-main .final-cta h2 {
      margin: 0 0 6px;
      font-size: 26px;
      letter-spacing: 0;
    }

    .download-page-main .final-cta p {
      margin: 0;
      color: #c6d1e1;
    }

    .footer {
      color: #c4cedd;
      background: #0d1829;
    }

    .footer-main {
      padding: 56px 0 42px;
      display: grid;
      grid-template-columns: 1.45fr 1fr 1fr 1fr;
      gap: 42px;
    }

    .footer .logo {
      color: #ffffff;
    }

    .footer-brand p {
      max-width: 390px;
      margin: 18px 0;
      color: #9facc0;
      font-size: 14px;
    }

    .footer-social {
      color: #ffffff;
    }

    .footer-column h3 {
      margin: 7px 0 18px;
      color: #ffffff;
      font-size: 15px;
    }

    .footer-links {
      display: grid;
      gap: 9px;
    }

    .footer-links a,
    .footer-contact a {
      color: #aeb9ca;
      font-size: 14px;
    }

    .footer-links a:hover,
    .footer-contact a:hover {
      color: #ffffff;
    }

    .footer-contact {
      display: grid;
      gap: 14px;
      color: #aeb9ca;
      font-size: 14px;
    }

    .footer-contact span {
      color: #77869c;
      font-size: 12px;
    }

    .footer-bottom {
      min-height: 62px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      color: #7f8ba0;
      border-top: 1px solid rgba(255, 255, 255, 0.09);
      font-size: 13px;
    }

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

      .hamburger {
        display: block;
      }

      .header-btns {
        margin-left: auto;
      }

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

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

      .topbar-inner {
        padding: 8px 0;
        align-items: flex-start;
        flex-direction: column;
        gap: 2px;
      }

      .topbar-contact {
        flex-wrap: wrap;
        gap: 3px 16px;
      }

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

      .header .logo span {
        max-width: 130px;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .header .logo img {
        width: 36px;
        height: 36px;
      }

      .member-entry {
        display: none;
      }

      .account-entry {
        padding: 6px 12px;
      }

      .download-page-main .download-intro {
        padding: 48px 0 52px;
      }

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

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

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

      .download-page-main .security-inner {
        gap: 14px;
      }

      .download-page-main .download-section {
        padding: 56px 0;
      }

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

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

      .download-page-main .step:not(:last-child)::after {
        display: none;
      }

      .download-page-main .notice {
        flex-direction: column;
        gap: 4px;
      }

      .download-page-main .final-cta-inner {
        padding: 28px 22px;
        align-items: flex-start;
        flex-direction: column;
      }

      .footer-main {
        grid-template-columns: 1fr;
        gap: 30px;
      }

      .footer-bottom {
        padding: 18px 0;
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 4px;
      }
    }

    @media (max-width: 430px) {
      .header .logo span {
        max-width: 92px;
        font-size: 15px;
      }

      .account-entry {
        display: none;
      }

      .download-page-main h1 {
        font-size: 32px;
      }

      .download-page-main .security-strip {
        margin-top: -14px;
      }

      .download-page-main .platform-meta {
        align-items: flex-start;
        flex-direction: column;
        gap: 4px;
      }
    }