:root {
      --primary: #0B3D91;
      --template-theme: {主题色};
      --primary-dark: #07295f;
      --primary-light: #eaf1fb;
      --silver: #c8d0dc;
      --ink: #132033;
      --muted: #64748b;
      --line: #dfe5ed;
      --surface: #f5f7fa;
      --white: #ffffff;
      --success: #178552;
      --danger: #b42318;
      --shadow: 0 16px 40px rgba(15, 35, 65, .12);
      --container: 1220px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      color: var(--ink);
      background: var(--surface);
      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(calc(100% - 40px), var(--container));
      margin: 0 auto;
    }

    .topbar {
      color: #e6edf7;
      background: #071b38;
      border-bottom: 1px solid rgba(255, 255, 255, .12);
      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-contact a {
      transition: color .2s ease;
    }

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

    .header {
      position: relative;
      z-index: 50;
      background: var(--white);
      border-bottom: 1px solid var(--line);
      box-shadow: 0 5px 18px rgba(17, 34, 58, .05);
    }

    .header-inner {
      min-height: 76px;
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .logo {
      min-width: 170px;
      display: inline-flex;
      align-items: center;
      gap: 11px;
      color: var(--primary-dark);
      font-weight: 800;
    }

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

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

    .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 14px;
      display: inline-flex;
      align-items: center;
      color: #24344b;
      font-size: 15px;
      font-weight: 700;
      white-space: nowrap;
      border-bottom: 3px solid transparent;
      transition: color .2s ease, border-color .2s ease;
    }

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

    .has-arrow::after {
      width: 6px;
      height: 6px;
      margin-left: 7px;
      content: "";
      border-right: 1.5px solid currentColor;
      border-bottom: 1.5px solid currentColor;
      transform: rotate(45deg) translateY(-2px);
    }

    .dropdown-panel,
    .mega-menu {
      position: absolute;
      top: 100%;
      z-index: 60;
      visibility: hidden;
      opacity: 0;
      transform: translateY(8px);
      pointer-events: none;
      transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
    }

    .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);
      pointer-events: auto;
    }

    .dropdown-panel {
      width: 330px;
      margin-left: -30px;
      padding: 20px;
      background: var(--white);
      border: 1px solid var(--line);
      border-top: 3px solid var(--primary);
      box-shadow: var(--shadow);
    }

    .dropdown-title {
      margin: 0 0 12px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 800;
    }

    .news-link {
      padding: 10px 0;
      display: block;
      overflow: hidden;
      color: #27364b;
      font-size: 14px;
      text-overflow: ellipsis;
      white-space: nowrap;
      border-bottom: 1px solid #edf0f4;
    }

    .news-link:hover {
      color: var(--primary);
    }

    .dropdown-footer,
    .mega-footer {
      color: var(--primary);
      font-size: 13px;
      font-weight: 800;
    }

    .dropdown-footer {
      margin-top: 14px;
      display: flex;
      justify-content: space-between;
    }

    .mega-menu {
      left: 0;
      right: 0;
      padding: 24px max(20px, calc((100vw - var(--container)) / 2));
      background: var(--white);
      border-top: 1px solid var(--line);
      box-shadow: 0 22px 42px rgba(12, 31, 58, .14);
    }

    .mega-layout {
      display: grid;
      grid-template-columns: 235px minmax(0, 1fr);
      gap: 30px;
    }

    .mega-side {
      padding-right: 26px;
      border-right: 1px solid var(--line);
    }

    .mega-side h3 {
      margin: 0 0 8px;
      color: var(--primary-dark);
      font-size: 19px;
    }

    .mega-side p {
      margin: 0 0 16px;
      color: var(--muted);
      font-size: 13px;
    }

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

    .mega-categories a {
      padding: 6px 9px;
      color: #334155;
      background: #eef3f9;
      border: 1px solid #dde5ef;
      font-size: 12px;
    }

    .mega-categories a:hover {
      color: var(--white);
      background: var(--primary);
      border-color: var(--primary);
    }

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

    .mega-head strong {
      color: #1b2a3d;
      font-size: 16px;
    }

    .mega-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
    }

    .mega-card {
      min-width: 0;
      min-height: 108px;
      padding: 13px;
      display: grid;
      grid-template-columns: 54px minmax(0, 1fr);
      align-content: start;
      gap: 5px 11px;
      background: #f8fafc;
      border: 1px solid #e5eaf0;
      transition: border-color .2s ease, box-shadow .2s ease;
    }

    .mega-card:hover {
      border-color: #a8b9d2;
      box-shadow: 0 8px 20px rgba(20, 50, 90, .09);
    }

    .mega-card img {
      width: 54px;
      height: 54px;
      grid-row: 1 / span 3;
      object-fit: contain;
      background: var(--white);
      border: 1px solid #edf0f4;
    }

    .mega-card strong,
    .mega-card p {
      min-width: 0;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .mega-card strong {
      color: #1c2d44;
      font-size: 13px;
      white-space: nowrap;
    }

    .mega-card p {
      margin: 0;
      color: var(--muted);
      font-size: 12px;
      white-space: nowrap;
    }

    .mega-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 3px 9px;
      color: #66758a;
      font-size: 11px;
    }

    .video-card img,
    .product-card img {
      object-fit: cover;
    }

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

    .header-btns > a,
    .header-btns > button:not(.hamburger) {
      min-height: 38px;
      padding: 8px 13px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--line);
      background: var(--white);
      font-size: 13px;
      font-weight: 700;
    }

    .header-btns .open-account {
      color: var(--white);
      background: var(--primary);
      border-color: var(--primary);
    }

    .hamburger {
      width: 42px;
      height: 42px;
      padding: 9px;
      display: none;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
      background: transparent;
      border: 1px solid var(--line);
      cursor: pointer;
    }

    .hamburger span {
      width: 20px;
      height: 2px;
      display: block;
      background: var(--primary-dark);
      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;
      opacity: 0;
      background: rgba(4, 14, 30, .58);
      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: 100;
      width: min(88vw, 390px);
      overflow-y: auto;
      background: var(--white);
      box-shadow: -20px 0 50px rgba(3, 15, 31, .2);
      transform: translateX(105%);
      transition: transform .25s ease;
    }

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

    .drawer-head {
      min-height: 68px;
      padding: 13px 16px;
      display: flex;
      align-items: center;
      gap: 9px;
      color: var(--white);
      background: var(--primary-dark);
    }

    .drawer-head > a,
    .drawer-head > button:not(.drawer-close) {
      padding: 7px 11px;
      color: var(--white);
      background: rgba(255, 255, 255, .1);
      border: 1px solid rgba(255, 255, 255, .25);
      font-size: 13px;
    }

    .drawer-close {
      width: 38px;
      height: 38px;
      margin-left: auto;
      color: var(--white);
      background: transparent;
      border: 0;
      font-size: 28px;
      line-height: 1;
      cursor: pointer;
    }

    .drawer-menu {
      padding: 12px 18px 30px;
    }

    .drawer-link,
    .drawer-toggle {
      width: 100%;
      min-height: 50px;
      padding: 13px 4px;
      display: flex;
      align-items: center;
      color: #1d2d43;
      background: transparent;
      border: 0;
      border-bottom: 1px solid var(--line);
      font-weight: 700;
      text-align: left;
      cursor: pointer;
    }

    .drawer-toggle {
      justify-content: space-between;
    }

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

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

    .drawer-submenu {
      max-height: 0;
      overflow: hidden;
      background: #f5f8fc;
      transition: max-height .3s ease;
    }

    .drawer-submenu.open {
      max-height: 900px;
    }

    .drawer-submenu a {
      padding: 10px 14px;
      display: block;
      color: #56657a;
      font-size: 13px;
      border-bottom: 1px solid #e7ebf1;
    }

    .drawer-submenu a:hover {
      color: var(--primary);
    }

    .video-page {
      min-height: 65vh;
    }

    .video-page .page-banner {
      position: relative;
      overflow: hidden;
      color: var(--white);
      background: #071b38;
      border-bottom: 1px solid #1c3e70;
    }

    .video-page .page-banner::before {
      position: absolute;
      inset: 0;
      content: "";
      background:
        linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
      background-size: 36px 36px;
      mask-image: linear-gradient(to bottom, #000, transparent);
    }

    .video-page .banner-inner {
      position: relative;
      min-height: 300px;
      padding: 64px 0 52px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
    }

    .video-page .banner-kicker {
      margin-bottom: 12px;
      padding: 5px 11px;
      color: #dce8fa;
      border: 1px solid rgba(220, 232, 250, .35);
      font-size: 12px;
      font-weight: 800;
    }

    .video-page .page-banner h1 {
      margin: 0;
      max-width: 900px;
      font-size: 40px;
      line-height: 1.25;
      letter-spacing: 0;
    }

    .video-page .page-banner p {
      max-width: 720px;
      margin: 16px auto 0;
      color: #bdcbe0;
      font-size: 16px;
    }

    .video-page .category-strip {
      position: relative;
      z-index: 2;
      margin-top: -25px;
    }

    .video-page .category-nav {
      padding: 14px;
      display: flex;
      gap: 9px;
      overflow-x: auto;
      background: var(--white);
      border: 1px solid var(--line);
      box-shadow: 0 12px 30px rgba(12, 33, 61, .1);
      scrollbar-width: thin;
    }

    .video-page .category-nav a {
      min-height: 40px;
      padding: 8px 15px;
      display: inline-flex;
      align-items: center;
      color: #32435b;
      background: #f4f7fb;
      border: 1px solid #e0e6ee;
      font-size: 14px;
      font-weight: 700;
      white-space: nowrap;
      transition: color .2s ease, background .2s ease, border-color .2s ease;
    }

    .video-page .category-nav a:hover {
      color: var(--white);
      background: var(--primary);
      border-color: var(--primary);
    }

    .video-page .video-section {
      padding: 56px 0 76px;
    }

    .video-page .section-heading {
      margin-bottom: 25px;
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 24px;
      border-bottom: 1px solid var(--line);
    }

    .video-page .section-title {
      margin: 0;
      padding-bottom: 13px;
      color: var(--primary-dark);
      font-size: 27px;
      line-height: 1.3;
      border-bottom: 3px solid var(--primary);
    }

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

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

    .video-page .video-item {
      min-width: 0;
      overflow: hidden;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 6px;
      box-shadow: 0 7px 22px rgba(23, 43, 70, .06);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }

    .video-page .video-item:hover {
      transform: translateY(-4px);
      border-color: #b7c6da;
      box-shadow: 0 16px 34px rgba(19, 47, 84, .12);
    }

    .video-page .video-cover {
      position: relative;
      display: block;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #dce3ec;
    }

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

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

    .video-page .play-icon {
      position: absolute;
      left: 18px;
      bottom: 16px;
      width: 44px;
      height: 44px;
      display: grid;
      place-items: center;
      color: var(--white);
      background: var(--primary);
      border: 2px solid rgba(255, 255, 255, .8);
      border-radius: 50%;
      box-shadow: 0 5px 16px rgba(0, 0, 0, .25);
    }

    .video-page .play-icon::before {
      margin-left: 3px;
      content: "";
      border-top: 7px solid transparent;
      border-bottom: 7px solid transparent;
      border-left: 11px solid currentColor;
    }

    .video-page .video-duration {
      position: absolute;
      right: 12px;
      bottom: 12px;
      padding: 3px 7px;
      color: var(--white);
      background: rgba(6, 18, 36, .82);
      font-size: 12px;
      font-weight: 700;
    }

    .video-page .video-body {
      min-width: 0;
      padding: 18px;
    }

    .video-page .video-label {
      margin-bottom: 8px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
      font-size: 12px;
      font-weight: 800;
    }

    .video-page .video-label::before {
      width: 6px;
      height: 6px;
      content: "";
      background: var(--primary);
      border-radius: 50%;
    }

    .video-page .video-title {
      min-height: 48px;
      margin: 0 0 9px;
      color: #17283e;
      font-size: 17px;
      line-height: 1.45;
    }

    .video-page .video-title a:hover {
      color: var(--primary);
    }

    .video-page .video-summary {
      min-height: 66px;
      margin: 0;
      display: -webkit-box;
      overflow: hidden;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.65;
      -webkit-box-orient: vertical;
      -webkit-line-clamp: 3;
    }

    .video-page .video-meta {
      margin-top: 16px;
      padding-top: 13px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      color: #718096;
      border-top: 1px solid #edf0f4;
      font-size: 12px;
    }

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

    .video-page .pagination {
      margin-top: 40px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }

    .video-page .pagination a {
      min-width: 42px;
      height: 42px;
      padding: 0 13px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #334155;
      background: var(--white);
      border: 1px solid var(--line);
      font-size: 14px;
      font-weight: 700;
      transition: color .2s ease, background .2s ease, border-color .2s ease;
    }

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

    .video-page .learning-note {
      margin-bottom: 76px;
      padding: 28px 30px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      align-items: center;
      gap: 30px;
      color: var(--white);
      background: var(--primary-dark);
      border-left: 5px solid var(--silver);
    }

    .video-page .learning-note h2 {
      margin: 0 0 5px;
      font-size: 21px;
      line-height: 1.35;
    }

    .video-page .learning-note p {
      margin: 0;
      color: #c7d3e4;
      font-size: 14px;
    }

    .video-page .learning-note a {
      min-height: 44px;
      padding: 10px 18px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-dark);
      background: var(--white);
      font-weight: 800;
      white-space: nowrap;
    }

    .footer {
      color: #c7d1df;
      background: #07182f;
      border-top: 4px solid var(--primary);
    }

    .footer-main {
      padding: 55px 0 44px;
      display: grid;
      grid-template-columns: 1.45fr .8fr .8fr 1fr;
      gap: 42px;
    }

    .footer .logo {
      color: var(--white);
    }

    .footer-brand p {
      max-width: 410px;
      margin: 18px 0;
      color: #9fadc0;
      font-size: 13px;
    }

    .footer-social {
      color: var(--white);
    }

    .footer h3 {
      margin: 0 0 17px;
      color: var(--white);
      font-size: 15px;
    }

    .footer-links,
    .footer-contact {
      display: flex;
      flex-direction: column;
      gap: 9px;
      font-size: 13px;
    }

    .footer-links a,
    .footer-contact a {
      color: #b2bfd0;
      transition: color .2s ease;
    }

    .footer-links a:hover,
    .footer-contact a:hover {
      color: var(--white);
    }

    .footer-contact span {
      color: #8797ac;
    }

    .footer-bottom {
      min-height: 66px;
      padding: 18px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      color: #8291a6;
      border-top: 1px solid rgba(255, 255, 255, .1);
      font-size: 12px;
    }

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

      .hamburger {
        display: flex;
      }

      .header-inner {
        justify-content: space-between;
      }

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

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

      .footer-main {
        grid-template-columns: 1.4fr 1fr 1fr;
      }

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

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

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

      .topbar-welcome {
        display: none;
      }

      .topbar-contact {
        width: 100%;
        gap: 5px 16px;
        flex-wrap: wrap;
      }

      .header-inner {
        min-height: 66px;
        gap: 10px;
      }

      .logo {
        min-width: 0;
      }

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

      .logo span {
        max-width: 130px;
        font-size: 14px;
      }

      .header-btns > a,
      .header-btns > button:not(.hamburger) {
        display: none;
      }

      .video-page .banner-inner {
        min-height: 255px;
        padding: 44px 0;
      }

      .video-page .page-banner h1 {
        font-size: 30px;
      }

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

      .video-page .category-strip {
        margin-top: -18px;
      }

      .video-page .category-nav {
        padding: 10px;
      }

      .video-page .video-section {
        padding: 42px 0 56px;
      }

      .video-page .section-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 4px;
      }

      .video-page .section-title {
        font-size: 23px;
      }

      .video-page .section-heading p {
        margin-bottom: 11px;
      }

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

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

      .video-page .learning-note {
        margin-bottom: 56px;
        padding: 24px 20px;
        grid-template-columns: 1fr;
        gap: 20px;
      }

      .video-page .learning-note a {
        width: 100%;
      }

      .footer-main {
        padding: 42px 0 34px;
        grid-template-columns: 1fr 1fr;
        gap: 32px 22px;
      }

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

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

    @media (max-width: 460px) {
      .topbar-contact {
        flex-direction: column;
      }

      .video-page .page-banner h1 {
        font-size: 26px;
      }

      .video-page .video-body {
        padding: 16px;
      }

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

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