:root {
      --theme: #0B3D91;
      --theme-dark: #072b68;
      --accent: #d91b69;
      --accent-dark: #aa1050;
      --ink: #182033;
      --muted: #667085;
      --line: #e3e7ee;
      --soft: #f4f6f9;
      --white: #ffffff;
      --success: #15803d;
      --shadow: 0 12px 36px rgba(24, 32, 51, 0.09);
    }

    * {
      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;
      font-size: 15px;
      line-height: 1.7;
      letter-spacing: 0;
    }

    body.drawer-lock {
      overflow: hidden;
    }

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

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

    button,
    input,
    textarea,
    select {
      font: inherit;
    }

    button,
    a {
      -webkit-tap-highlight-color: transparent;
    }

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

    .topbar {
      color: #dbe8ff;
      background: #071d42;
      font-size: 13px;
    }

    .topbar-inner {
      min-height: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

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

    .topbar a {
      transition: color 0.2s ease;
    }

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

    .header {
      position: relative;
      z-index: 80;
      background: var(--white);
      border-bottom: 1px solid var(--line);
    }

    .header-inner {
      min-height: 76px;
      display: flex;
      align-items: center;
      gap: 26px;
    }

    .logo {
      min-width: 0;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--theme);
      font-size: 19px;
      font-weight: 800;
      line-height: 1.25;
    }

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

    .logo span {
      max-width: 180px;
      overflow-wrap: anywhere;
    }

    .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;
      display: flex;
      align-items: center;
    }

    .nav-link {
      min-height: 76px;
      padding: 0 13px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #30384b;
      font-weight: 650;
      white-space: nowrap;
      transition: color 0.2s ease;
    }

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

    .nav-link.active::after {
      content: "";
      position: absolute;
      right: 13px;
      bottom: 0;
      left: 13px;
      height: 3px;
      background: var(--accent);
    }

    .has-arrow::after {
      content: "";
      width: 6px;
      height: 6px;
      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: 0;
      z-index: 90;
      visibility: hidden;
      opacity: 0;
      transform: translateY(8px);
      pointer-events: none;
      background: var(--white);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
    }

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

    .dropdown-panel {
      width: 280px;
      padding: 10px;
      border-radius: 0 0 6px 6px;
    }

    .dropdown-panel a {
      display: block;
      padding: 10px 12px;
      color: #3d4658;
      border-radius: 4px;
      line-height: 1.45;
    }

    .dropdown-panel a:hover {
      color: var(--theme);
      background: #eef4ff;
    }

    .dropdown-panel a:last-child {
      margin-top: 6px;
      color: var(--accent);
      border-top: 1px solid var(--line);
      border-radius: 0;
      font-weight: 700;
    }

    .mega-menu {
      width: 650px;
      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: 20px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--line);
    }

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

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

    .mega-category-list {
      margin-bottom: 14px;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .mega-category-list a {
      padding: 5px 10px;
      color: #465066;
      background: var(--soft);
      border: 1px solid #e8ebf1;
      border-radius: 4px;
      font-size: 13px;
    }

    .mega-category-list a:hover {
      color: var(--theme);
      border-color: #b8cae8;
    }

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

    .mega-card {
      min-width: 0;
      min-height: 82px;
      display: flex;
      align-items: center;
      gap: 11px;
      padding: 10px;
      border: 1px solid var(--line);
      border-radius: 6px;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .mega-card:hover {
      border-color: #b4c7e8;
      box-shadow: 0 6px 18px rgba(11, 61, 145, 0.08);
    }

    .mega-card > img {
      width: 54px;
      height: 54px;
      flex: 0 0 54px;
      object-fit: cover;
      background: var(--soft);
      border-radius: 5px;
    }

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

    .mega-card-body strong {
      display: block;
      overflow: hidden;
      color: #263044;
      line-height: 1.35;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .mega-card-body p {
      margin: 4px 0;
      overflow: hidden;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.4;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .mega-card-body small {
      display: block;
      overflow: hidden;
      color: #7a8496;
      font-size: 11px;
      line-height: 1.5;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .mega-footer {
      margin-top: 14px;
      display: block;
      padding: 10px 12px;
      color: var(--theme);
      background: #eef4ff;
      border-radius: 5px;
      font-weight: 700;
      text-align: center;
    }

    .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 15px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--white);
      background: var(--theme);
      border-radius: 5px;
      font-weight: 700;
      transition: background 0.2s ease;
    }

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

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

    .hamburger span {
      width: 20px;
      height: 2px;
      display: block;
      background: var(--ink);
      transition: transform 0.2s ease, opacity 0.2s 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: 110;
      visibility: hidden;
      opacity: 0;
      background: rgba(7, 20, 42, 0.56);
      transition: opacity 0.25s ease, visibility 0.25s ease;
    }

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

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      z-index: 120;
      width: min(390px, 90vw);
      overflow-y: auto;
      background: var(--white);
      box-shadow: -16px 0 40px rgba(7, 20, 42, 0.18);
      transform: translateX(102%);
      transition: transform 0.25s 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 {
      color: var(--theme);
      font-weight: 700;
    }

    .drawer-close {
      width: 38px;
      height: 38px;
      margin-left: auto;
      color: #344054;
      background: var(--soft);
      border: 0;
      border-radius: 5px;
      font-size: 26px;
      line-height: 1;
      cursor: pointer;
    }

    .drawer-menu {
      padding: 12px 18px 28px;
    }

    .drawer-link,
    .drawer-toggle {
      width: 100%;
      min-height: 48px;
      padding: 11px 4px;
      display: flex;
      align-items: center;
      color: #273146;
      background: transparent;
      border: 0;
      border-bottom: 1px solid var(--line);
      font-weight: 700;
      text-align: left;
      cursor: pointer;
    }

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

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

    .drawer-submenu {
      max-height: 0;
      overflow: hidden;
      background: #f7f9fc;
      transition: max-height 0.3s ease;
    }

    .drawer-submenu.open {
      max-height: 700px;
    }

    .drawer-submenu a {
      display: block;
      padding: 10px 14px;
      color: #566074;
      border-bottom: 1px solid #e8ebf1;
      line-height: 1.45;
    }

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

    .article-page {
      padding: 34px 0 76px;
    }

    .article-page .article-breadcrumb {
      margin-bottom: 20px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      color: var(--muted);
      font-size: 13px;
    }

    .article-page .article-breadcrumb a {
      color: var(--theme);
    }

    .article-page .article-breadcrumb span + span::before,
    .article-page .article-breadcrumb a + span::before {
      content: "/";
      margin-right: 8px;
      color: #a4acba;
    }

    .article-page .article-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 300px;
      align-items: start;
      gap: 28px;
    }

    .article-page .article-primary {
      min-width: 0;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 7px;
      box-shadow: 0 8px 28px rgba(24, 32, 51, 0.05);
    }

    .article-page .article-header {
      padding: 38px 42px 28px;
      border-bottom: 1px solid var(--line);
    }

    .article-page .article-category {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      color: var(--accent-dark);
      font-size: 13px;
      font-weight: 750;
    }

    .article-page .article-category::before {
      content: "";
      width: 7px;
      height: 7px;
      background: var(--accent);
      border-radius: 50%;
    }

    .article-page .article-title {
      margin: 13px 0 17px;
      color: #131a2a;
      font-size: clamp(28px, 3.2vw, 44px);
      line-height: 1.22;
      letter-spacing: 0;
      overflow-wrap: anywhere;
    }

    .article-page .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 22px;
      color: var(--muted);
      font-size: 13px;
    }

    .article-page .article-meta span {
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }

    .article-page .article-meta span::before {
      content: "";
      width: 5px;
      height: 5px;
      background: #aab1bd;
      border-radius: 50%;
    }

    .article-page .article-body {
      min-width: 0;
      max-width: 100%;
      padding: 36px 42px 44px;
      overflow-x: auto;
      color: #2e3749;
      font-size: 17px;
      line-height: 1.9;
    }

    .article-page .article-body > :first-child {
      margin-top: 0;
    }

    .article-page .article-body > :last-child {
      margin-bottom: 0;
    }

    .article-page .article-body h2,
    .article-page .article-body h3,
    .article-page .article-body h4 {
      margin: 1.8em 0 0.7em;
      color: #141c2d;
      line-height: 1.4;
      letter-spacing: 0;
    }

    .article-page .article-body h2 {
      padding-left: 14px;
      border-left: 4px solid var(--accent);
      font-size: 25px;
    }

    .article-page .article-body h3 {
      font-size: 21px;
    }

    .article-page .article-body p {
      margin: 0 0 1.25em;
    }

    .article-page .article-body a {
      color: var(--theme);
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .article-page .article-body img,
    .article-page .article-body video,
    .article-page .article-body iframe {
      max-width: 100%;
      height: auto;
      margin: 24px auto;
    }

    .article-page .article-body iframe {
      width: 100%;
      min-height: 420px;
      border: 0;
    }

    .article-page .article-body table {
      width: 100%;
      max-width: 100%;
      margin: 24px 0;
      border-collapse: collapse;
    }

    .article-page .article-body th,
    .article-page .article-body td {
      min-width: 120px;
      padding: 11px 13px;
      border: 1px solid var(--line);
      text-align: left;
    }

    .article-page .article-body th {
      color: var(--theme-dark);
      background: #edf3fd;
    }

    .article-page .article-body blockquote {
      margin: 24px 0;
      padding: 18px 22px;
      color: #465066;
      background: #f5f7fa;
      border-left: 4px solid var(--theme);
    }

    .article-page .article-body pre {
      max-width: 100%;
      padding: 18px;
      overflow-x: auto;
      color: #e8eef9;
      background: #111827;
      border-radius: 5px;
    }

    .article-page .article-tags {
      padding: 22px 42px;
      display: flex;
      align-items: flex-start;
      gap: 12px;
      border-top: 1px solid var(--line);
    }

    .article-page .article-tags strong {
      flex: 0 0 auto;
      color: #30394c;
    }

    .article-page .article-tags-content {
      min-width: 0;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .article-page .article-tags-content a {
      padding: 4px 10px;
      color: var(--theme);
      background: #edf3fd;
      border: 1px solid #dbe7fa;
      border-radius: 4px;
      font-size: 13px;
    }

    .article-page .article-navigation {
      margin-top: 18px;
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }

    .article-page .article-navigation a {
      min-width: 0;
      min-height: 104px;
      padding: 18px 20px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 7px;
      transition: border-color 0.2s ease, transform 0.2s ease;
    }

    .article-page .article-navigation a:hover {
      border-color: #a9bfe3;
      transform: translateY(-2px);
    }

    .article-page .article-navigation small {
      margin-bottom: 5px;
      color: var(--muted);
    }

    .article-page .article-navigation strong {
      overflow: hidden;
      color: #222b3e;
      line-height: 1.45;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .article-page .article-sidebar {
      min-width: 0;
    }

    .article-page .sidebar-panel {
      margin-bottom: 18px;
      padding: 22px;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 7px;
    }

    .article-page .sidebar-panel h2 {
      margin: 0 0 15px;
      padding-bottom: 11px;
      color: #1e283b;
      border-bottom: 1px solid var(--line);
      font-size: 18px;
      line-height: 1.4;
    }

    .article-page .sidebar-panel h2::after {
      content: "";
      width: 42px;
      height: 3px;
      margin-top: 9px;
      display: block;
      background: var(--accent);
    }

    .article-page .sidebar-quick-links {
      display: grid;
      gap: 9px;
    }

    .article-page .sidebar-quick-links a {
      padding: 10px 12px;
      color: #344054;
      background: var(--soft);
      border-left: 3px solid transparent;
      border-radius: 4px;
    }

    .article-page .sidebar-quick-links a:hover {
      color: var(--theme);
      border-left-color: var(--theme);
    }

    .article-page .risk-note {
      color: #5f687a;
      font-size: 13px;
      line-height: 1.75;
    }

    .article-page .risk-note strong {
      display: block;
      margin-bottom: 6px;
      color: #293247;
    }

    .article-page .related-section {
      margin-top: 36px;
    }

    .article-page .section-heading {
      margin-bottom: 18px;
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 20px;
    }

    .article-page .section-heading h2 {
      margin: 0;
      color: #172033;
      font-size: 27px;
      line-height: 1.35;
    }

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

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

    .article-page .related-card {
      min-width: 0;
      overflow: hidden;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 7px;
      transition: box-shadow 0.2s ease, transform 0.2s ease;
    }

    .article-page .related-card:hover {
      box-shadow: var(--shadow);
      transform: translateY(-3px);
    }

    .article-page .related-card img {
      width: 100%;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      background: #e8ebf1;
    }

    .article-page .related-card-body {
      padding: 17px;
    }

    .article-page .related-card h3 {
      min-height: 48px;
      margin: 0 0 9px;
      overflow: hidden;
      color: #20293b;
      font-size: 16px;
      line-height: 1.5;
      display: -webkit-box;
      -webkit-box-orient: vertical;
      -webkit-line-clamp: 2;
    }

    .article-page .related-card p {
      min-height: 63px;
      margin: 0 0 13px;
      overflow: hidden;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.6;
      display: -webkit-box;
      -webkit-box-orient: vertical;
      -webkit-line-clamp: 3;
    }

    .article-page .related-meta {
      display: flex;
      justify-content: space-between;
      gap: 10px;
      color: #7c8596;
      font-size: 12px;
    }

    .footer {
      color: #cbd5e6;
      background: #071a38;
    }

    .footer-main {
      padding: 58px 0 42px;
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 46px;
    }

    .footer .logo {
      color: #ffffff;
    }

    .footer-brand p {
      max-width: 390px;
      margin: 18px 0;
      color: #aebbd0;
      font-size: 14px;
    }

    .footer-social {
      color: #ffffff;
    }

    .footer-column h3 {
      margin: 5px 0 17px;
      color: #ffffff;
      font-size: 16px;
    }

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

    .footer-links a,
    .footer-contact a {
      color: #bdc9dc;
      transition: color 0.2s ease;
    }

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

    .footer-contact {
      display: grid;
      gap: 13px;
      font-size: 14px;
    }

    .footer-contact span {
      color: #8fa0ba;
      font-size: 12px;
    }

    .footer-bottom {
      min-height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      color: #91a1b9;
      border-top: 1px solid rgba(255, 255, 255, 0.11);
      font-size: 13px;
    }

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

      .hamburger {
        display: flex;
      }

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

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

      .article-page .article-layout {
        grid-template-columns: minmax(0, 1fr) 270px;
      }

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

    @media (max-width: 820px) {
      .article-page {
        padding-top: 24px;
      }

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

      .article-page .article-sidebar {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 18px;
      }

      .article-page .sidebar-panel {
        margin-bottom: 0;
      }

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

    @media (max-width: 640px) {
      .container {
        width: min(100% - 24px, 1180px);
      }

      .topbar-inner {
        min-height: 48px;
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 1px;
        padding: 6px 0;
      }

      .topbar-contact {
        width: 100%;
        gap: 6px 14px;
        flex-wrap: wrap;
      }

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

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

      .header .logo span {
        max-width: 120px;
        font-size: 16px;
      }

      .header-btns {
        gap: 6px;
      }

      .header-btns .member-entry {
        display: none;
      }

      .account-entry {
        min-height: 36px;
        padding: 6px 10px;
        font-size: 13px;
      }

      .article-page .article-header {
        padding: 27px 21px 22px;
      }

      .article-page .article-title {
        font-size: 29px;
      }

      .article-page .article-body {
        padding: 26px 21px 32px;
        font-size: 16px;
      }

      .article-page .article-body iframe {
        min-height: 220px;
      }

      .article-page .article-tags {
        padding: 18px 21px;
        flex-direction: column;
      }

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

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

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

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

      .article-page .related-card h3,
      .article-page .related-card p {
        min-height: 0;
      }

      .footer-main {
        padding: 42px 0 32px;
        grid-template-columns: 1fr;
        gap: 30px;
      }

      .footer-bottom {
        padding: 16px 0;
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 3px;
      }
    }