:root {
      --theme: #0B3D91;
      --theme-dark: #072b68;
      --theme-light: #eaf1fb;
      --ink: #172033;
      --muted: #657087;
      --line: #dfe4ec;
      --surface: #ffffff;
      --soft: #f5f7fa;
      --danger: #b42318;
      --shadow: 0 12px 32px rgba(17, 32, 61, .1);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

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

    body,
    button,
    input {
      font: inherit;
    }

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

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

    button {
      color: inherit;
    }

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

    .topbar {
      color: #dbe7fa;
      background: #071b3a;
      font-size: 13px;
    }

    .topbar-inner {
      min-height: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

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

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

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

    .header-inner {
      min-height: 76px;
      display: flex;
      align-items: center;
      gap: 22px;
    }

    .logo {
      min-width: 170px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--theme);
      font-size: 19px;
      font-weight: 800;
    }

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

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

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

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

    .nav-link {
      padding: 0 13px;
      display: flex;
      align-items: center;
      color: #28344a;
      font-size: 15px;
      font-weight: 700;
      white-space: nowrap;
      border-bottom: 3px solid transparent;
    }

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

    .has-arrow::after {
      content: "";
      width: 6px;
      height: 6px;
      margin-left: 7px;
      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%;
      left: 50%;
      z-index: 60;
      visibility: hidden;
      opacity: 0;
      transform: translate(-50%, 8px);
      background: var(--surface);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      transition: opacity .18s ease, transform .18s ease, visibility .18s;
    }

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

    .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: translate(-50%, 0);
    }

    .dropdown-panel {
      width: 330px;
      padding: 20px;
    }

    .panel-title,
    .mega-section h3 {
      margin: 0 0 13px;
      color: #172033;
      font-size: 15px;
    }

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

    .dropdown-list > a,
    .mega-list > a {
      padding: 9px 10px;
      color: #3a465d;
      border-radius: 4px;
    }

    .dropdown-list > a:hover,
    .mega-list > a:hover {
      color: var(--theme);
      background: var(--theme-light);
    }

    .mega-menu {
      width: min(900px, calc(100vw - 40px));
      padding: 24px;
    }

    .nav-item:nth-last-child(-n+3) .mega-menu {
      left: auto;
      right: 0;
      transform: translate(0, 8px);
    }

    .nav-item:nth-last-child(-n+3):hover > .mega-menu,
    .nav-item:nth-last-child(-n+3):focus-within > .mega-menu {
      transform: translate(0, 0);
    }

    .mega-columns {
      display: grid;
      grid-template-columns: 1.15fr 1.15fr .8fr;
      gap: 24px;
    }

    .mega-section {
      min-width: 0;
    }

    .mega-section + .mega-section {
      padding-left: 24px;
      border-left: 1px solid var(--line);
    }

    .mega-section p {
      margin: 0 0 16px;
      color: var(--muted);
      font-size: 14px;
    }

    .mega-meta {
      display: block;
      margin-top: 2px;
      overflow: hidden;
      color: var(--muted);
      font-size: 11px;
      font-weight: 400;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .broker-mega-card,
    .video-mega-card,
    .product-mega-card {
      display: flex;
      align-items: center;
      gap: 10px;
      min-width: 0;
    }

    .broker-mega-card img,
    .product-mega-card img {
      flex: 0 0 38px;
      width: 38px;
      height: 38px;
      object-fit: contain;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 4px;
    }

    .video-mega-card img {
      flex: 0 0 62px;
      width: 62px;
      height: 40px;
      object-fit: cover;
      border-radius: 3px;
    }

    .broker-mega-card span,
    .video-mega-card span,
    .product-mega-card span {
      min-width: 0;
      overflow: hidden;
      font-size: 13px;
      font-weight: 700;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .mega-footer {
      display: inline-flex;
      margin-top: 14px;
      color: var(--theme);
      font-size: 13px;
      font-weight: 800;
    }

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

    .member-link {
      color: var(--theme);
      font-size: 14px;
      font-weight: 700;
      white-space: nowrap;
    }

    .account-link {
      padding: 9px 15px;
      color: #fff;
      background: var(--theme);
      border-radius: 4px;
      font-size: 14px;
      font-weight: 800;
      white-space: nowrap;
    }

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

    .hamburger {
      width: 42px;
      height: 42px;
      padding: 10px;
      display: none;
      border: 1px solid var(--line);
      border-radius: 4px;
      background: #fff;
      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: 90;
      visibility: hidden;
      opacity: 0;
      background: rgba(5, 13, 28, .58);
      transition: opacity .2s ease, visibility .2s;
    }

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

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      z-index: 100;
      width: min(380px, 88vw);
      overflow-y: auto;
      background: #fff;
      box-shadow: -16px 0 45px rgba(5, 13, 28, .2);
      transform: translateX(105%);
      transition: transform .25s ease;
    }

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

    .drawer-head {
      min-height: 72px;
      padding: 15px 18px;
      display: flex;
      align-items: center;
      gap: 13px;
      color: #fff;
      background: var(--theme);
    }

    .drawer-head a {
      font-weight: 700;
    }

    .drawer-close {
      width: 38px;
      height: 38px;
      margin-left: auto;
      color: #fff;
      background: transparent;
      border: 1px solid rgba(255, 255, 255, .45);
      border-radius: 4px;
      font-size: 25px;
      line-height: 1;
      cursor: pointer;
    }

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

    .drawer-link,
    .drawer-toggle {
      width: 100%;
      padding: 14px 4px;
      display: block;
      color: var(--ink);
      background: transparent;
      border: 0;
      border-bottom: 1px solid var(--line);
      text-align: left;
      font-weight: 800;
      cursor: pointer;
    }

    .drawer-toggle {
      position: relative;
    }

    .drawer-toggle::after {
      content: "+";
      position: absolute;
      right: 4px;
      color: var(--theme);
      font-size: 20px;
    }

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

    .drawer-submenu {
      max-height: 0;
      overflow: hidden;
      background: var(--soft);
      transition: max-height .3s ease;
    }

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

    .drawer-submenu a {
      padding: 10px 14px;
      display: block;
      color: #47536a;
      border-bottom: 1px solid #e8ebf0;
      font-size: 14px;
    }

    .ea-content-stack {
      min-width: 0;
    }

    .ea-content-stack .product-breadcrumb {
      padding: 15px 0;
      color: var(--muted);
      font-size: 13px;
    }

    .ea-content-stack .product-breadcrumb a:hover {
      color: var(--theme);
    }

    .ea-content-stack .product-overview {
      padding: 34px 0 40px;
      background: #fff;
      border-top: 1px solid #eef1f5;
      border-bottom: 1px solid var(--line);
    }

    .ea-content-stack .product-overview-grid {
      display: grid;
      grid-template-columns: minmax(280px, 440px) minmax(0, 1fr);
      align-items: center;
      gap: 48px;
    }

    .ea-content-stack .product-image-frame {
      min-height: 360px;
      padding: 28px;
      display: grid;
      place-items: center;
      background: #f2f5f9;
      border: 1px solid var(--line);
      border-radius: 6px;
    }

    .ea-content-stack .product-image-frame img {
      width: 100%;
      max-height: 360px;
      object-fit: contain;
    }

    .ea-content-stack .product-category {
      margin: 0 0 10px;
      color: var(--theme);
      font-size: 14px;
      font-weight: 800;
    }

    .ea-content-stack .product-title {
      margin: 0;
      color: #121a2b;
      font-size: clamp(30px, 4vw, 48px);
      line-height: 1.2;
      overflow-wrap: anywhere;
    }

    .ea-content-stack .product-summary {
      margin: 18px 0 22px;
      color: #566177;
      font-size: 17px;
    }

    .ea-content-stack .product-facts {
      margin: 0 0 25px;
      padding: 0;
      display: flex;
      flex-wrap: wrap;
      gap: 10px 24px;
      list-style: none;
      color: var(--muted);
      font-size: 14px;
    }

    .ea-content-stack .product-facts strong {
      color: var(--ink);
    }

    .ea-content-stack .product-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

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

    .ea-content-stack .primary-action {
      color: #fff;
      background: var(--theme);
      border: 1px solid var(--theme);
    }

    .ea-content-stack .primary-action:hover {
      background: var(--theme-dark);
    }

    .ea-content-stack .secondary-action {
      color: var(--theme);
      background: #fff;
      border: 1px solid var(--theme);
    }

    .ea-content-stack .product-layout {
      padding: 40px 0 64px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 300px;
      align-items: start;
      gap: 30px;
    }

    .ea-content-stack .product-content,
    .ea-content-stack .product-sidebar {
      min-width: 0;
    }

    .ea-content-stack .product-content {
      padding: 30px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 6px;
    }

    .ea-content-stack .section-heading {
      margin: 0 0 24px;
      padding-bottom: 14px;
      color: #182237;
      border-bottom: 2px solid var(--theme);
      font-size: 23px;
    }

    .ea-content-stack .product-body {
      min-width: 0;
      max-width: 100%;
      overflow-x: auto;
      color: #3e495d;
      font-size: 16px;
    }

    .ea-content-stack .product-body img,
    .ea-content-stack .product-body video,
    .ea-content-stack .product-body iframe,
    .ea-content-stack .product-body table {
      max-width: 100%;
    }

    .ea-content-stack .product-body img {
      height: auto;
    }

    .ea-content-stack .product-body table {
      width: 100%;
      border-collapse: collapse;
    }

    .ea-content-stack .product-body th,
    .ea-content-stack .product-body td {
      padding: 10px;
      border: 1px solid var(--line);
    }

    .ea-content-stack .product-sidebar {
      position: sticky;
      top: 22px;
      display: grid;
      gap: 20px;
    }

    .ea-content-stack .sidebar-panel {
      padding: 22px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 6px;
    }

    .ea-content-stack .sidebar-panel h2 {
      margin: 0 0 15px;
      font-size: 18px;
    }

    .ea-content-stack .sidebar-list {
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .ea-content-stack .sidebar-list li {
      padding: 10px 0;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      border-bottom: 1px solid var(--line);
      color: var(--muted);
      font-size: 14px;
    }

    .ea-content-stack .sidebar-list li:last-child {
      border-bottom: 0;
    }

    .ea-content-stack .sidebar-list strong {
      color: var(--ink);
      text-align: right;
    }

    .ea-content-stack .risk-note {
      border-top: 3px solid var(--danger);
    }

    .ea-content-stack .risk-note p {
      margin: 0;
      color: #5d6677;
      font-size: 13px;
    }

    .ea-content-stack .related-products {
      padding: 54px 0 66px;
      background: #fff;
      border-top: 1px solid var(--line);
    }

    .ea-content-stack .related-head {
      margin-bottom: 24px;
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 20px;
    }

    .ea-content-stack .related-head h2 {
      margin: 0;
      font-size: 28px;
    }

    .ea-content-stack .related-head p {
      margin: 0;
      color: var(--muted);
    }

    .ea-content-stack .related-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 20px;
    }

    .ea-content-stack .related-card {
      min-width: 0;
      overflow: hidden;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 6px;
      transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
    }

    .ea-content-stack .related-card:hover {
      border-color: var(--theme);
      box-shadow: var(--shadow);
      transform: translateY(-3px);
    }

    .ea-content-stack .related-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      background: var(--soft);
    }

    .ea-content-stack .related-card-body {
      padding: 18px;
    }

    .ea-content-stack .related-card h3 {
      margin: 0 0 9px;
      overflow-wrap: anywhere;
      font-size: 18px;
      line-height: 1.45;
    }

    .ea-content-stack .related-card p {
      min-height: 48px;
      margin: 0 0 14px;
      overflow: hidden;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .ea-content-stack .related-meta {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      color: #7b8495;
      font-size: 12px;
    }

    .footer {
      color: #cbd5e5;
      background: #09182e;
    }

    .footer-main {
      padding: 52px 0 36px;
      display: grid;
      grid-template-columns: 1.45fr 1fr 1fr 1fr;
      gap: 42px;
    }

    .footer h2,
    .footer h3 {
      margin: 0 0 15px;
      color: #fff;
    }

    .footer h2 {
      font-size: 22px;
    }

    .footer h3 {
      font-size: 15px;
    }

    .footer p {
      margin: 0;
      color: #9fabc0;
      font-size: 14px;
    }

    .footer-links {
      margin: 0;
      padding: 0;
      display: grid;
      gap: 8px;
      list-style: none;
      font-size: 14px;
    }

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

    .footer-bottom {
      min-height: 68px;
      padding: 16px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      color: #8f9bb0;
      border-top: 1px solid rgba(255, 255, 255, .12);
      font-size: 13px;
    }

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

      .hamburger {
        display: block;
      }

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

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

      .ea-content-stack .product-overview-grid {
        gap: 30px;
      }
    }

    @media (max-width: 820px) {
      .topbar-inner {
        padding: 7px 0;
        align-items: flex-start;
      }

      .topbar-contact {
        align-items: flex-end;
        flex-direction: column;
        gap: 2px;
      }

      .ea-content-stack .product-overview-grid,
      .ea-content-stack .product-layout {
        grid-template-columns: 1fr;
      }

      .ea-content-stack .product-image-frame {
        min-height: 280px;
      }

      .ea-content-stack .product-sidebar {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .ea-content-stack .related-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

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

    @media (max-width: 580px) {
      .container {
        width: min(100% - 28px, 1180px);
      }

      .topbar-inner {
        display: block;
      }

      .topbar-contact {
        margin-top: 4px;
        align-items: flex-start;
      }

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

      .logo {
        min-width: 0;
        max-width: 48%;
        font-size: 16px;
      }

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

      .member-link {
        display: none;
      }

      .account-link {
        padding: 8px 11px;
      }

      .ea-content-stack .product-overview {
        padding: 24px 0 30px;
      }

      .ea-content-stack .product-image-frame {
        min-height: 220px;
        padding: 20px;
      }

      .ea-content-stack .product-title {
        font-size: 30px;
      }

      .ea-content-stack .product-summary {
        font-size: 15px;
      }

      .ea-content-stack .product-actions > a {
        width: 100%;
      }

      .ea-content-stack .product-layout {
        padding: 26px 0 44px;
      }

      .ea-content-stack .product-content {
        padding: 20px 16px;
      }

      .ea-content-stack .product-sidebar,
      .ea-content-stack .related-grid {
        grid-template-columns: 1fr;
      }

      .ea-content-stack .related-head {
        align-items: flex-start;
        flex-direction: column;
      }

      .ea-content-stack .related-card img {
        height: 200px;
      }

      .footer-main {
        padding: 40px 0 28px;
        grid-template-columns: 1fr;
        gap: 28px;
      }

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