:root {
      --theme: #0B3D91;
      --theme-token: {主题色};
      --theme-dark: #072963;
      --theme-soft: #eaf1fb;
      --ink: #152033;
      --muted: #657084;
      --line: #dfe5ed;
      --surface: #ffffff;
      --page: #f4f6f9;
      --accent: #d59b26;
      --success: #177659;
      --shadow: 0 12px 34px rgba(15, 35, 68, 0.09);
      --container: 1240px;
    }

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

    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: 0 auto;
    }

    .topbar {
      color: #dce8fb;
      background: #081d3d;
      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: var(--surface);
      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;
      border-radius: 6px;
      object-fit: contain;
      background: #ffffff;
    }

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

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

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

    .nav-link {
      position: relative;
      display: flex;
      align-items: center;
      padding: 0 12px;
      color: #273449;
      font-weight: 600;
      white-space: nowrap;
    }

    .nav-link::after {
      position: absolute;
      right: 12px;
      bottom: 16px;
      left: 12px;
      height: 2px;
      content: "";
      background: var(--theme);
      transform: scaleX(0);
      transition: transform 0.2s ease;
    }

    .nav-link.has-arrow {
      padding-right: 25px;
    }

    .nav-link.has-arrow::before {
      position: absolute;
      top: 50%;
      right: 10px;
      width: 6px;
      height: 6px;
      content: "";
      border-right: 1px solid currentColor;
      border-bottom: 1px solid currentColor;
      transform: translateY(-65%) rotate(45deg);
    }

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

    .dropdown-panel,
    .mega-menu {
      position: absolute;
      top: 100%;
      right: 0;
      left: 0;
      visibility: hidden;
      opacity: 0;
      transform: translateY(8px);
      pointer-events: none;
      transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
    }

    .dropdown-panel::before,
    .mega-menu::before {
      position: absolute;
      right: 0;
      bottom: 100%;
      left: 0;
      height: 12px;
      content: "";
    }

    .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-shell,
    .mega-shell {
      width: min(calc(100% - 40px), var(--container));
      margin: 0 auto;
      padding: 24px;
      background: #ffffff;
      border: 1px solid var(--line);
      border-top: 3px solid var(--theme);
      box-shadow: 0 24px 45px rgba(7, 26, 56, 0.15);
    }

    .dropdown-shell {
      max-width: 560px;
      margin-right: calc((100% - min(calc(100% - 40px), var(--container))) / 2);
    }

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

    .dropdown-list {
      display: grid;
      gap: 4px;
    }

    .dropdown-list a,
    .mega-category-links a {
      padding: 9px 10px;
      border-radius: 4px;
    }

    .dropdown-list a:hover,
    .mega-category-links a:hover {
      color: var(--theme);
      background: var(--theme-soft);
    }

    .mega-layout {
      display: grid;
      grid-template-columns: 220px minmax(0, 1fr);
      gap: 26px;
    }

    .mega-category-links {
      display: grid;
      gap: 3px;
    }

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

    .mega-card {
      min-width: 0;
      display: grid;
      grid-template-columns: 54px minmax(0, 1fr);
      gap: 12px;
      align-items: center;
      padding: 12px;
      background: #f7f9fc;
      border: 1px solid #e8ecf2;
      border-radius: 6px;
    }

    .mega-card:hover {
      border-color: #a8bee0;
      background: var(--theme-soft);
    }

    .mega-card > img {
      width: 54px;
      height: 54px;
      object-fit: cover;
      border-radius: 4px;
      background: #ffffff;
    }

    .mega-card > span,
    .mega-card strong,
    .mega-summary {
      min-width: 0;
      display: block;
    }

    .mega-card strong {
      color: #17243a;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .mega-summary {
      margin-top: 3px;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.45;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .mega-stats {
      margin-top: 4px;
      display: flex;
      flex-wrap: wrap;
      gap: 3px 8px;
      color: var(--muted);
      font-size: 11px;
      line-height: 1.4;
    }

    .mega-footer {
      margin-top: 18px;
      padding-top: 14px;
      display: flex;
      justify-content: flex-end;
      color: var(--theme);
      border-top: 1px solid var(--line);
      font-weight: 700;
    }

    .header-btns {
      display: flex;
      align-items: center;
      gap: 8px;
      white-space: nowrap;
    }

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

    .hamburger {
      width: 42px;
      height: 42px;
      padding: 10px;
      display: none;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
      background: #ffffff;
      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;
      z-index: 90;
      inset: 0;
      visibility: hidden;
      opacity: 0;
      background: rgba(5, 14, 28, 0.56);
      transition: opacity 0.25s ease, visibility 0.25s;
    }

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

    .mobile-drawer {
      position: fixed;
      z-index: 100;
      top: 0;
      right: 0;
      bottom: 0;
      width: min(390px, 90vw);
      overflow-y: auto;
      background: #ffffff;
      box-shadow: -18px 0 48px rgba(5, 18, 39, 0.18);
      transform: translateX(105%);
      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: 10px;
      border-bottom: 1px solid var(--line);
    }

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

    .drawer-close {
      width: 38px;
      height: 38px;
      margin-left: auto;
      padding: 0;
      color: #344057;
      background: #f1f4f8;
      border: 0;
      border-radius: 4px;
      font-size: 26px;
      line-height: 1;
      cursor: pointer;
    }

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

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

    .drawer-toggle {
      position: relative;
      padding-right: 30px;
    }

    .drawer-toggle::after {
      position: absolute;
      right: 7px;
      width: 8px;
      height: 8px;
      content: "";
      border-right: 2px solid var(--theme);
      border-bottom: 2px solid var(--theme);
      transform: rotate(45deg);
      transition: transform 0.2s ease;
    }

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

    .drawer-submenu {
      max-height: 0;
      padding: 0 10px;
      overflow: hidden;
      background: #f5f7fa;
      transition: max-height 0.3s ease, padding 0.3s ease;
    }

    .drawer-submenu.open {
      max-height: 780px;
      padding: 8px 10px;
    }

    .drawer-submenu a {
      padding: 9px 5px;
      display: block;
      color: #526077;
      border-bottom: 1px dashed #dce2eb;
    }

    .category-page {
      min-width: 0;
    }

    .category-page .category-head {
      color: #ffffff;
      background:
        linear-gradient(rgba(6, 37, 84, 0.93), rgba(11, 61, 145, 0.92)),
        radial-gradient(circle at 84% 18%, #d59b26 0 2px, transparent 3px);
      border-bottom: 4px solid var(--accent);
    }

    .category-page .category-head-inner {
      min-height: 270px;
      padding-top: 52px;
      padding-bottom: 52px;
      display: flex;
      justify-content: center;
      flex-direction: column;
    }

    .category-page .breadcrumb {
      margin-bottom: 22px;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      color: #ccdaf0;
      font-size: 13px;
    }

    .category-page .breadcrumb a:hover {
      color: #ffffff;
    }

    .category-page .category-kicker {
      margin: 0 0 8px;
      color: #f1c66e;
      font-size: 13px;
      font-weight: 800;
    }

    .category-page h1 {
      margin: 0;
      max-width: 850px;
      font-size: 40px;
      line-height: 1.2;
      letter-spacing: 0;
    }

    .category-page .category-intro {
      max-width: 780px;
      margin: 17px 0 0;
      color: #dce6f5;
      font-size: 16px;
    }

    .category-page .category-toolbar {
      padding: 20px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--line);
    }

    .category-page .toolbar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .category-page .topic-links {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .category-page .topic-links a {
      padding: 7px 12px;
      color: #344259;
      background: #f3f5f8;
      border: 1px solid #e2e7ee;
      border-radius: 4px;
      font-size: 13px;
      font-weight: 700;
    }

    .category-page .topic-links a:hover {
      color: #ffffff;
      background: var(--theme);
      border-color: var(--theme);
    }

    .category-page .toolbar-note {
      color: var(--muted);
      font-size: 13px;
      white-space: nowrap;
    }

    .category-page .article-section {
      padding: 46px 0 66px;
    }

    .category-page .section-heading {
      margin-bottom: 22px;
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 20px;
    }

    .category-page .section-heading h2 {
      margin: 0;
      color: #17243a;
      font-size: 25px;
      line-height: 1.3;
    }

    .category-page .section-heading p {
      margin: 0;
      color: var(--muted);
      font-size: 13px;
    }

    .category-page .article-list {
      display: grid;
      gap: 18px;
    }

    .category-page .article-card {
      min-width: 0;
      display: grid;
      grid-template-columns: 320px minmax(0, 1fr);
      overflow: hidden;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 7px;
      box-shadow: 0 4px 16px rgba(17, 36, 68, 0.04);
      transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    }

    .category-page .article-card:hover {
      border-color: #adc0dc;
      box-shadow: var(--shadow);
      transform: translateY(-2px);
    }

    .category-page .article-cover {
      position: relative;
      min-height: 245px;
      overflow: hidden;
      background: #dfe6ef;
    }

    .category-page .article-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.35s ease;
    }

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

    .category-page .category-badge {
      position: absolute;
      top: 15px;
      left: 15px;
      max-width: calc(100% - 30px);
      padding: 5px 10px;
      overflow: hidden;
      color: #1b2638;
      background: #f4c66b;
      border-radius: 3px;
      font-size: 12px;
      font-weight: 800;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .category-page .article-body {
      min-width: 0;
      padding: 25px 28px 23px;
      display: flex;
      flex-direction: column;
    }

    .category-page .article-meta {
      margin-bottom: 10px;
      display: flex;
      flex-wrap: wrap;
      gap: 5px 16px;
      color: var(--muted);
      font-size: 12px;
    }

    .category-page .article-meta span {
      position: relative;
    }

    .category-page .article-meta span:not(:last-child)::after {
      position: absolute;
      top: 50%;
      right: -9px;
      width: 3px;
      height: 3px;
      content: "";
      background: #a9b2c0;
      border-radius: 50%;
      transform: translateY(-50%);
    }

    .category-page .article-title {
      margin: 0;
      color: #17243a;
      font-size: 22px;
      line-height: 1.42;
      letter-spacing: 0;
    }

    .category-page .article-title a:hover {
      color: var(--theme);
    }

    .category-page .article-summary {
      min-height: 4.8em;
      margin: 12px 0 15px;
      display: -webkit-box;
      overflow: hidden;
      color: #59667a;
      line-height: 1.7;
      -webkit-box-orient: vertical;
      -webkit-line-clamp: 3;
    }

    .category-page .article-tags {
      margin-top: auto;
      padding-top: 3px;
      color: var(--theme);
      font-size: 13px;
      overflow-wrap: anywhere;
    }

    .category-page .article-actions {
      margin-top: 16px;
      padding-top: 15px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      border-top: 1px solid #edf0f4;
    }

    .category-page .article-author {
      min-width: 0;
      color: var(--muted);
      font-size: 12px;
      overflow-wrap: anywhere;
    }

    .category-page .read-more {
      flex: 0 0 auto;
      padding: 8px 14px;
      color: #ffffff;
      background: var(--theme);
      border-radius: 4px;
      font-size: 13px;
      font-weight: 800;
    }

    .category-page .read-more:hover {
      background: var(--theme-dark);
    }

    .category-page .pagination {
      margin-top: 34px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 7px;
    }

    .category-page .pagination a {
      min-width: 40px;
      min-height: 40px;
      padding: 7px 12px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #344259;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 4px;
      font-weight: 700;
    }

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

    .category-page .research-note {
      margin-top: 38px;
      padding: 25px 28px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 24px;
      align-items: center;
      color: #ffffff;
      background: #162a4b;
      border-left: 5px solid var(--accent);
      border-radius: 6px;
    }

    .category-page .research-note h2 {
      margin: 0 0 5px;
      font-size: 20px;
      letter-spacing: 0;
    }

    .category-page .research-note p {
      margin: 0;
      color: #cbd6e8;
    }

    .category-page .research-note a {
      padding: 10px 17px;
      color: #19243a;
      background: #f1c66e;
      border-radius: 4px;
      font-weight: 800;
      white-space: nowrap;
    }

    .footer {
      color: #b9c6d8;
      background: #08182f;
    }

    .footer-main {
      padding-top: 54px;
      padding-bottom: 42px;
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
      gap: 42px;
    }

    .footer .logo {
      color: #ffffff;
    }

    .footer-brand p {
      max-width: 430px;
      margin: 18px 0;
      color: #aebed2;
      font-size: 14px;
    }

    .footer h3 {
      margin: 5px 0 16px;
      color: #ffffff;
      font-size: 15px;
    }

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

    .footer-links a,
    .footer-contact a {
      overflow-wrap: anywhere;
    }

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

    .footer-contact strong {
      color: #e8eef7;
      font-size: 13px;
    }

    .footer-bottom {
      min-height: 66px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      font-size: 13px;
    }

    @media (max-width: 1120px) {
      .main-nav {
        display: none;
      }

      .header-inner {
        min-height: 70px;
      }

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

      .hamburger {
        display: flex;
      }

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

    @media (max-width: 820px) {
      .category-page .article-card {
        grid-template-columns: 250px minmax(0, 1fr);
      }

      .category-page .article-cover {
        min-height: 270px;
      }

      .category-page .article-body {
        padding: 21px;
      }

      .category-page .article-title {
        font-size: 19px;
      }

      .category-page .toolbar-inner {
        align-items: flex-start;
        flex-direction: column;
      }

      .category-page .toolbar-note {
        white-space: normal;
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(calc(100% - 28px), var(--container));
      }

      .topbar-inner {
        min-height: 44px;
        align-items: flex-start;
        justify-content: center;
        flex-direction: column;
        gap: 1px;
        padding-top: 5px;
        padding-bottom: 5px;
      }

      .topbar-contact {
        width: 100%;
        gap: 4px 14px;
        flex-wrap: wrap;
      }

      .logo span {
        max-width: 145px;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .header-btns > a {
        padding: 7px 10px;
        font-size: 13px;
      }

      .category-page .category-head-inner {
        min-height: 235px;
        padding-top: 38px;
        padding-bottom: 38px;
      }

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

      .category-page .category-intro {
        font-size: 14px;
      }

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

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

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

      .category-page .article-cover {
        min-height: 0;
        aspect-ratio: 16 / 9;
      }

      .category-page .article-body {
        padding: 20px;
      }

      .category-page .article-summary {
        min-height: 4.8em;
        -webkit-line-clamp: 3;
      }

      .category-page .article-actions {
        align-items: flex-start;
        flex-direction: column;
      }

      .category-page .research-note {
        grid-template-columns: 1fr;
      }

      .category-page .research-note a {
        justify-self: start;
      }

      .footer-main {
        grid-template-columns: 1fr;
        gap: 28px;
        padding-top: 42px;
      }

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

    @media (max-width: 420px) {
      .header-btns > a {
        display: none;
      }

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

      .category-page h1 {
        font-size: 27px;
      }

      .category-page .article-title {
        font-size: 18px;
      }
    }