:root {
      --theme: #0B3D91;
      --theme-token: {主题色};
      --theme-dark: #07285f;
      --theme-light: #e9f0fb;
      --ink: #172033;
      --muted: #667085;
      --line: #dfe5ee;
      --surface: #ffffff;
      --page: #f4f6f9;
      --night: #07152f;
      --accent: #22c7a9;
      --warning: #f2b84b;
      --shadow: 0 12px 34px rgba(23, 32, 51, .09);
      --container: 1200px;
    }

    * {
      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.drawer-locked {
      overflow: hidden;
    }

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

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

    button,
    input {
      font: inherit;
    }

    button {
      color: inherit;
    }

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

    .topbar {
      color: #dbe7fb;
      background: var(--night);
      font-size: 13px;
    }

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

    .topbar span:last-child {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .topbar a {
      color: #dbe7fb;
    }

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

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

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

    .logo {
      min-width: 0;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--theme-dark);
      font-size: 18px;
      font-weight: 800;
    }

    .logo img {
      width: 42px;
      height: 42px;
      flex: 0 0 auto;
      object-fit: contain;
    }

    .logo span {
      max-width: 180px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .main-nav {
      align-self: stretch;
      display: flex;
      align-items: stretch;
      margin-left: auto;
    }

    .nav-list {
      height: 100%;
      display: flex;
      align-items: stretch;
      gap: 2px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .nav-item {
      position: relative;
      display: flex;
      align-items: stretch;
    }

    .nav-link {
      position: relative;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 0 13px;
      color: #25314a;
      font-size: 15px;
      font-weight: 600;
    }

    .nav-link::after {
      position: absolute;
      right: 13px;
      bottom: 15px;
      left: 13px;
      height: 2px;
      content: "";
      background: var(--theme);
      transform: scaleX(0);
      transform-origin: center;
      transition: transform .2s ease;
    }

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

    .nav-link:hover::after,
    .nav-item:focus-within > .nav-link::after {
      transform: scaleX(1);
    }

    .nav-link.has-arrow {
      padding-right: 24px;
    }

    .nav-link.has-arrow::before {
      position: absolute;
      top: 50%;
      right: 10px;
      width: 6px;
      height: 6px;
      content: "";
      border-right: 1.5px solid currentColor;
      border-bottom: 1.5px solid currentColor;
      transform: translateY(-65%) rotate(45deg);
    }

    .dropdown-panel,
    .mega-menu {
      position: absolute;
      top: 100%;
      z-index: 80;
      visibility: hidden;
      border: 1px solid var(--line);
      background: var(--surface);
      box-shadow: var(--shadow);
      opacity: 0;
      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: 10px;
      content: "";
    }

    .dropdown-panel {
      left: 0;
      width: 300px;
      padding: 10px;
    }

    .dropdown-panel > a:not(.mega-footer) {
      display: block;
      overflow: hidden;
      padding: 10px 12px;
      border-radius: 5px;
      color: #344054;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

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

    .mega-menu {
      right: -150px;
      width: min(760px, calc(100vw - 40px));
      padding: 22px 22px 0;
    }

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

    .mega-grid {
      display: grid;
      grid-template-columns: 190px minmax(0, 1fr);
      gap: 24px;
    }

    .mega-grid h4 {
      margin: 0 0 10px;
      color: var(--theme-dark);
      font-size: 16px;
    }

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

    .mega-grid > div:first-child > a {
      display: block;
      margin: 7px 0;
      color: #344054;
      font-size: 14px;
    }

    .mega-grid > div:first-child > a:hover {
      color: var(--theme);
    }

    .mega-cards {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 9px;
    }

    .mega-card {
      min-width: 0;
      min-height: 68px;
      display: grid;
      grid-template-columns: auto minmax(0, 1fr);
      align-content: center;
      column-gap: 9px;
      padding: 10px 12px;
      border: 1px solid #e7ebf1;
      border-radius: 6px;
      background: #fafbfc;
    }

    .mega-card:hover {
      border-color: #b8c9e8;
      background: var(--theme-light);
    }

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

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

    .mega-card b {
      color: #24324a;
      font-size: 13px;
    }

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

    .mega-footer {
      display: block;
      margin: 18px -22px 0;
      padding: 12px 22px;
      border-top: 1px solid var(--line);
      color: var(--theme);
      background: #f8fafc;
      font-size: 13px;
      font-weight: 700;
      text-align: right;
    }

    .dropdown-panel .mega-footer {
      margin: 8px -10px -10px;
      padding: 11px 14px;
    }

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

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

    .open-btn {
      min-height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 7px 17px;
      border-radius: 5px;
      color: #ffffff;
      background: var(--theme);
      font-size: 14px;
      font-weight: 700;
    }

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

    .hamburger {
      width: 42px;
      height: 42px;
      display: none;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
      padding: 0;
      border: 1px solid var(--line);
      border-radius: 5px;
      background: #ffffff;
      cursor: pointer;
    }

    .hamburger span {
      width: 19px;
      height: 2px;
      display: block;
      background: var(--ink);
      transition: transform .2s ease, opacity .2s ease;
    }

    .hamburger.active span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

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

    .hamburger.active span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    .drawer-overlay {
      position: fixed;
      inset: 0;
      z-index: 90;
      visibility: hidden;
      background: rgba(5, 14, 31, .58);
      opacity: 0;
      transition: opacity .25s ease, visibility .25s;
    }

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

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      z-index: 100;
      width: min(390px, 92vw);
      overflow-y: auto;
      background: #ffffff;
      box-shadow: -18px 0 42px rgba(7, 21, 47, .2);
      transform: translateX(105%);
      transition: transform .25s ease;
    }

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

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

    .drawer-head > a {
      padding: 7px 12px;
      border-radius: 4px;
      color: #ffffff;
      background: var(--theme);
      font-weight: 700;
    }

    .drawer-close {
      width: 38px;
      height: 38px;
      margin-left: auto;
      padding: 0;
      border: 0;
      background: transparent;
      font-size: 30px;
      line-height: 1;
      cursor: pointer;
    }

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

    .drawer-link,
    .drawer-toggle {
      width: 100%;
      min-height: 48px;
      display: flex;
      align-items: center;
      border: 0;
      border-bottom: 1px solid #edf0f4;
      background: transparent;
      color: #25314a;
      font-weight: 700;
      text-align: left;
      cursor: pointer;
    }

    .drawer-toggle {
      position: relative;
      padding: 0 28px 0 0;
    }

    .drawer-toggle::after {
      position: absolute;
      right: 4px;
      width: 8px;
      height: 8px;
      content: "";
      border-right: 2px solid var(--muted);
      border-bottom: 2px solid var(--muted);
      transform: translateY(-3px) rotate(45deg);
      transition: transform .2s ease;
    }

    .drawer-toggle.active::after {
      transform: translateY(2px) 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 {
      display: block;
      padding: 10px 14px;
      border-bottom: 1px solid #e9edf3;
      color: #475467;
      font-size: 14px;
    }

    .drawer-submenu a:hover {
      color: var(--theme);
      background: var(--theme-light);
    }

    .video-page {
      min-height: 620px;
    }

    .video-page .video-heading {
      position: relative;
      overflow: hidden;
      color: #ffffff;
      background:
        radial-gradient(circle at 12% 26%, rgba(255,255,255,.14) 0 1px, transparent 2px),
        radial-gradient(circle at 82% 35%, rgba(255,255,255,.2) 0 1px, transparent 2px),
        linear-gradient(135deg, #06142f 0%, #0B3D91 58%, #12336a 100%);
      background-size: 90px 90px, 130px 130px, auto;
    }

    .video-page .video-heading::after {
      position: absolute;
      inset: auto 0 0;
      height: 1px;
      content: "";
      background: linear-gradient(90deg, transparent, rgba(255,255,255,.55), transparent);
    }

    .video-page .heading-inner {
      position: relative;
      z-index: 1;
      min-height: 250px;
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 34px;
      padding-top: 58px;
      padding-bottom: 50px;
    }

    .video-page .heading-copy {
      max-width: 760px;
    }

    .video-page .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      margin-bottom: 12px;
      color: #a9c8ff;
      font-size: 13px;
      font-weight: 700;
    }

    .video-page .eyebrow::before {
      width: 24px;
      height: 2px;
      content: "";
      background: var(--accent);
    }

    .video-page h1 {
      margin: 0 0 12px;
      font-size: clamp(30px, 4vw, 48px);
      line-height: 1.2;
      letter-spacing: 0;
    }

    .video-page .heading-copy p {
      max-width: 700px;
      margin: 0;
      color: #d9e6fb;
      font-size: 16px;
    }

    .video-page .heading-mark {
      width: 128px;
      height: 82px;
      flex: 0 0 auto;
      display: grid;
      place-items: center;
      border: 1px solid rgba(255,255,255,.22);
      border-radius: 7px;
      background: rgba(255,255,255,.08);
    }

    .video-page .play-symbol {
      width: 44px;
      height: 44px;
      display: grid;
      place-items: center;
      border: 1px solid rgba(255,255,255,.65);
      border-radius: 50%;
    }

    .video-page .play-symbol::before {
      width: 0;
      height: 0;
      margin-left: 4px;
      content: "";
      border-top: 8px solid transparent;
      border-bottom: 8px solid transparent;
      border-left: 13px solid #ffffff;
    }

    .video-page .category-strip {
      border-bottom: 1px solid var(--line);
      background: #ffffff;
    }

    .video-page .category-list {
      display: flex;
      align-items: center;
      gap: 8px;
      overflow-x: auto;
      padding: 14px 0;
      scrollbar-width: thin;
    }

    .video-page .category-list > span {
      flex: 0 0 auto;
      margin-right: 5px;
      color: #344054;
      font-size: 14px;
      font-weight: 800;
    }

    .video-page .category-list a {
      flex: 0 0 auto;
      padding: 7px 13px;
      border: 1px solid #d8e0eb;
      border-radius: 5px;
      color: #475467;
      background: #ffffff;
      font-size: 13px;
      font-weight: 600;
    }

    .video-page .category-list a:hover {
      border-color: var(--theme);
      color: var(--theme);
      background: var(--theme-light);
    }

    .video-page .video-section {
      padding: 46px 0 64px;
    }

    .video-page .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 24px;
    }

    .video-page .section-head h2 {
      margin: 0;
      color: #172033;
      font-size: 25px;
      line-height: 1.3;
      letter-spacing: 0;
    }

    .video-page .section-head p {
      margin: 5px 0 0;
      color: var(--muted);
      font-size: 14px;
    }

    .video-page .result-note {
      flex: 0 0 auto;
      color: var(--muted);
      font-size: 13px;
    }

    .video-page .video-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 22px;
    }

    .video-page .video-card {
      min-width: 0;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: 7px;
      background: #ffffff;
      box-shadow: 0 5px 20px rgba(23, 32, 51, .05);
      transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
    }

    .video-page .video-card:hover {
      border-color: #b8c8e2;
      box-shadow: var(--shadow);
      transform: translateY(-3px);
    }

    .video-page .video-cover {
      position: relative;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #102347;
    }

    .video-page .video-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .35s ease;
    }

    .video-page .video-card:hover .video-cover img {
      transform: scale(1.035);
    }

    .video-page .cover-shade {
      position: absolute;
      inset: 0;
      display: grid;
      place-items: center;
      background: linear-gradient(180deg, transparent 42%, rgba(4,12,28,.72) 100%);
    }

    .video-page .card-play {
      width: 46px;
      height: 46px;
      display: grid;
      place-items: center;
      border: 1px solid rgba(255,255,255,.72);
      border-radius: 50%;
      background: rgba(7, 21, 47, .56);
      backdrop-filter: blur(4px);
    }

    .video-page .card-play::before {
      width: 0;
      height: 0;
      margin-left: 4px;
      content: "";
      border-top: 7px solid transparent;
      border-bottom: 7px solid transparent;
      border-left: 11px solid #ffffff;
    }

    .video-page .duration {
      position: absolute;
      right: 10px;
      bottom: 9px;
      z-index: 2;
      padding: 3px 7px;
      border-radius: 3px;
      color: #ffffff;
      background: rgba(4, 10, 23, .82);
      font-size: 12px;
      font-weight: 700;
    }

    .video-page .video-body {
      padding: 17px 18px 19px;
    }

    .video-page .video-kicker {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 8px;
      color: var(--theme);
      font-size: 12px;
      font-weight: 800;
    }

    .video-page .video-kicker::before {
      width: 7px;
      height: 7px;
      flex: 0 0 auto;
      content: "";
      border-radius: 50%;
      background: var(--accent);
    }

    .video-page .video-body h3 {
      min-height: 50px;
      margin: 0 0 9px;
      color: #1d2939;
      font-size: 17px;
      line-height: 1.45;
      letter-spacing: 0;
    }

    .video-page .video-summary {
      min-height: 66px;
      display: -webkit-box;
      overflow: hidden;
      margin: 0 0 15px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.7;
      -webkit-box-orient: vertical;
      -webkit-line-clamp: 3;
    }

    .video-page .video-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding-top: 13px;
      border-top: 1px solid #edf0f4;
      color: #667085;
      font-size: 12px;
    }

    .video-page .watch-link {
      color: var(--theme);
      font-weight: 800;
    }

    .video-page .pagination {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      margin-top: 38px;
    }

    .video-page .pagination a {
      min-width: 40px;
      height: 40px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0 12px;
      border: 1px solid #d8e0eb;
      border-radius: 5px;
      color: #344054;
      background: #ffffff;
      font-size: 14px;
      font-weight: 700;
    }

    .video-page .pagination a:hover,
    .video-page .pagination a.active,
    .video-page .pagination a.current {
      border-color: var(--theme);
      color: #ffffff;
      background: var(--theme);
    }

    .footer {
      color: #cbd5e1;
      background: #08172e;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.45fr 1fr 1fr 1.2fr;
      gap: 42px;
      padding: 54px 0 42px;
    }

    .footer h4,
    .footer strong {
      display: block;
      margin: 0 0 14px;
      color: #ffffff;
      font-size: 16px;
    }

    .footer-brand strong {
      font-size: 20px;
    }

    .footer p {
      margin: 7px 0;
      color: #aebbd0;
      font-size: 13px;
    }

    .footer-grid > div > a {
      display: block;
      width: fit-content;
      margin: 8px 0;
      color: #cbd5e1;
      font-size: 13px;
    }

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

    .footer-bottom {
      min-height: 60px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      border-top: 1px solid rgba(255,255,255,.1);
      color: #8fa0b8;
      font-size: 12px;
    }

    @media (max-width: 1100px) {
      .main-nav {
        display: none;
      }

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

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

      .hamburger {
        display: flex;
      }

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

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

    @media (max-width: 720px) {
      .container {
        width: min(calc(100% - 28px), var(--container));
      }

      .topbar .container {
        min-height: 42px;
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 1px;
        padding: 5px 0;
      }

      .topbar span:last-child {
        flex-wrap: wrap;
        gap: 2px 14px;
      }

      .logo img {
        width: 38px;
        height: 38px;
      }

      .logo span {
        max-width: 130px;
        font-size: 16px;
      }

      .header-btns {
        gap: 6px;
      }

      .member-btn {
        display: none;
      }

      .open-btn {
        min-height: 38px;
        padding-inline: 13px;
      }

      .video-page .heading-inner {
        min-height: 230px;
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 22px;
        padding-top: 38px;
        padding-bottom: 38px;
      }

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

      .video-page .heading-copy p {
        font-size: 14px;
      }

      .video-page .heading-mark {
        width: 100%;
        height: 58px;
      }

      .video-page .play-symbol {
        width: 36px;
        height: 36px;
      }

      .video-page .video-section {
        padding: 34px 0 48px;
      }

      .video-page .section-head {
        align-items: flex-start;
        flex-direction: column;
        gap: 7px;
      }

      .video-page .video-grid {
        grid-template-columns: 1fr;
      }

      .video-page .video-body h3,
      .video-page .video-summary {
        min-height: 0;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 26px;
        padding: 42px 0 34px;
      }

      .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        padding: 16px 0;
      }
    }

    @media (max-width: 390px) {
      .logo span {
        max-width: 105px;
      }

      .open-btn {
        display: none;
      }
    }