:root {
      --primary: #0B3D91;
      --primary-dark: #072b68;
      --primary-soft: #eef4ff;
      --accent: #e13b35;
      --green: #087f5b;
      --ink: #172033;
      --muted: #637089;
      --line: #dce3ed;
      --surface: #ffffff;
      --page: #f5f7fa;
      --shadow: 0 14px 36px rgba(20, 39, 74, .09);
    }

    * {
      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,
    button,
    input {
      font-family: 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: #dce8ff;
      background: #071d42;
      font-size: 13px;
    }

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

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

    .topbar a {
      transition: color .2s ease;
    }

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

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

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

    .logo {
      min-width: 180px;
      display: inline-flex;
      align-items: center;
      gap: 11px;
      color: var(--primary);
      font-size: 20px;
      font-weight: 800;
    }

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

    .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: relative;
      display: flex;
      align-items: stretch;
    }

    .nav-link {
      position: relative;
      padding: 0 14px;
      display: flex;
      align-items: center;
      color: #2d3749;
      font-size: 15px;
      font-weight: 600;
      white-space: nowrap;
    }

    .nav-link::after {
      position: absolute;
      right: 14px;
      bottom: 0;
      left: 14px;
      height: 3px;
      background: var(--primary);
      content: "";
      transform: scaleX(0);
      transition: transform .2s ease;
    }

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

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

    .nav-link.has-arrow {
      padding-right: 28px;
    }

    .nav-link.has-arrow::before {
      position: absolute;
      top: 50%;
      right: 13px;
      width: 6px;
      height: 6px;
      border-right: 1.5px solid currentColor;
      border-bottom: 1.5px solid currentColor;
      content: "";
      transform: translateY(-70%) rotate(45deg);
    }

    .dropdown-panel,
    .mega-menu {
      position: absolute;
      top: 100%;
      right: 0;
      z-index: 80;
      padding: 22px;
      visibility: hidden;
      background: #ffffff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      opacity: 0;
      transform: translateY(10px);
      transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
    }

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

    .dropdown-panel {
      width: 310px;
    }

    .mega-menu {
      width: min(720px, calc(100vw - 40px));
    }

    .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);
    }

    .panel-title {
      margin: 0 0 12px;
      color: var(--primary);
      font-size: 15px;
    }

    .panel-list {
      display: grid;
      gap: 2px;
    }

    .panel-list > a {
      padding: 9px 10px;
      color: #39465b;
      border-radius: 4px;
      font-size: 13px;
      transition: color .2s ease, background .2s ease;
    }

    .panel-list > a:hover {
      color: var(--primary);
      background: var(--primary-soft);
    }

    .panel-list small {
      margin-top: 2px;
      display: block;
      color: var(--muted);
    }

    .mega-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.5fr) minmax(210px, .8fr);
      gap: 26px;
    }

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

    .mega-card {
      min-width: 0;
      padding: 11px;
      display: grid;
      grid-template-columns: auto minmax(0, 1fr);
      align-items: center;
      gap: 5px 9px;
      border: 1px solid #e4e9f1;
      border-radius: 5px;
      transition: border-color .2s ease, background .2s ease;
    }

    .mega-card:hover {
      background: var(--primary-soft);
      border-color: #b7c9e9;
    }

    .mega-card img {
      width: 30px;
      height: 30px;
      grid-row: 1 / span 2;
      object-fit: contain;
    }

    .mega-card strong {
      min-width: 0;
      overflow: hidden;
      color: #263247;
      font-size: 13px;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .mega-card small {
      min-width: 0;
      color: var(--muted);
      font-size: 11px;
    }

    .mega-footer {
      margin-top: 14px;
      padding: 10px 12px;
      display: block;
      color: var(--primary);
      background: var(--primary-soft);
      border-radius: 4px;
      font-size: 13px;
      font-weight: 700;
      text-align: center;
    }

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

    .member-btn,
    .open-btn {
      min-height: 38px;
      padding: 8px 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--primary);
      border-radius: 4px;
      font-size: 14px;
      font-weight: 700;
      white-space: nowrap;
    }

    .member-btn {
      color: var(--primary);
      background: #ffffff;
    }

    .open-btn {
      color: #ffffff;
      background: var(--primary);
    }

    .hamburger {
      width: 42px;
      height: 42px;
      padding: 9px;
      display: none;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 4px;
      cursor: pointer;
    }

    .hamburger span {
      width: 21px;
      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(7, 18, 38, .58);
      opacity: 0;
      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(390px, 90vw);
      overflow-y: auto;
      background: #ffffff;
      box-shadow: -18px 0 42px rgba(8, 24, 50, .18);
      transform: translateX(105%);
      transition: transform .25s ease;
    }

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

    .drawer-head {
      min-height: 68px;
      padding: 12px 14px 12px 20px;
      display: flex;
      align-items: center;
      gap: 14px;
      color: #ffffff;
      background: var(--primary);
    }

    .drawer-head > span {
      margin-right: auto;
      font-weight: 700;
    }

    .drawer-head > a {
      padding: 7px 12px;
      border: 1px solid rgba(255, 255, 255, .55);
      border-radius: 4px;
      font-size: 13px;
    }

    .drawer-close {
      width: 38px;
      height: 38px;
      color: #ffffff;
      background: transparent;
      border: 0;
      font-size: 28px;
      cursor: pointer;
    }

    .drawer-menu {
      padding: 12px 20px 28px;
    }

    .drawer-link,
    .drawer-toggle {
      width: 100%;
      min-height: 49px;
      padding: 12px 2px;
      display: flex;
      align-items: center;
      border: 0;
      border-bottom: 1px solid #e7ebf1;
      background: transparent;
      font-size: 15px;
      font-weight: 700;
      text-align: left;
      cursor: pointer;
    }

    .drawer-toggle {
      position: relative;
    }

    .drawer-toggle::after {
      position: absolute;
      right: 5px;
      width: 8px;
      height: 8px;
      border-right: 2px solid var(--primary);
      border-bottom: 2px solid var(--primary);
      content: "";
      transform: rotate(45deg);
      transition: transform .2s ease;
    }

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

    .drawer-submenu {
      max-height: 0;
      overflow: hidden;
      background: #f7f9fc;
      transition: max-height .25s ease;
    }

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

    .drawer-submenu a {
      padding: 10px 14px;
      display: block;
      color: #526078;
      border-bottom: 1px solid #e9edf3;
      font-size: 13px;
    }

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

    .category-page .category-head {
      position: relative;
      overflow: hidden;
      color: #ffffff;
      background: var(--primary);
      border-bottom: 6px solid #e13b35;
    }

    .category-page .category-head::before,
    .category-page .category-head::after {
      position: absolute;
      content: "";
      pointer-events: none;
    }

    .category-page .category-head::before {
      right: -70px;
      bottom: 30px;
      width: 480px;
      height: 5px;
      background: #f7c948;
      transform: rotate(-8deg);
    }

    .category-page .category-head::after {
      right: 130px;
      bottom: 5px;
      width: 250px;
      height: 5px;
      background: #28a96b;
      transform: rotate(8deg);
    }

    .category-page .category-head-inner {
      position: relative;
      z-index: 1;
      padding: 52px 0 48px;
    }

    .category-page .breadcrumb {
      margin-bottom: 18px;
      display: flex;
      align-items: center;
      gap: 9px;
      color: #dce8ff;
      font-size: 13px;
    }

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

    .category-page .category-label {
      margin: 0 0 7px;
      color: #bcd1fa;
      font-size: 13px;
      font-weight: 700;
    }

    .category-page .category-title {
      margin: 0;
      font-size: clamp(30px, 5vw, 48px);
      line-height: 1.2;
    }

    .category-page .category-description {
      max-width: 720px;
      margin: 14px 0 0;
      color: #e7efff;
      font-size: 16px;
    }

    .category-page .category-route {
      margin-top: 28px;
      display: flex;
      align-items: center;
      gap: 0;
    }

    .category-page .route-station {
      position: relative;
      min-width: 120px;
      padding-top: 24px;
      color: #ffffff;
      font-size: 13px;
      font-weight: 700;
      text-align: center;
    }

    .category-page .route-station::before {
      position: absolute;
      top: 3px;
      left: 50%;
      z-index: 2;
      width: 13px;
      height: 13px;
      background: #ffffff;
      border: 4px solid #f7c948;
      border-radius: 50%;
      content: "";
      transform: translateX(-50%);
    }

    .category-page .route-station::after {
      position: absolute;
      top: 11px;
      right: 50%;
      left: -50%;
      z-index: 1;
      height: 4px;
      background: #f7c948;
      content: "";
    }

    .category-page .route-station:first-child::after {
      display: none;
    }

    .category-page .content-band {
      padding: 42px 0 64px;
    }

    .category-page .content-layout {
      min-width: 0;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 280px;
      align-items: start;
      gap: 30px;
    }

    .category-page .section-heading {
      margin-bottom: 18px;
      padding-bottom: 13px;
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 18px;
      border-bottom: 1px solid var(--line);
    }

    .category-page .section-heading h2 {
      margin: 0;
      font-size: 24px;
    }

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

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

    .category-page .article-card {
      min-width: 0;
      overflow: hidden;
      display: grid;
      grid-template-columns: 290px minmax(0, 1fr);
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: 6px;
      box-shadow: 0 5px 18px rgba(24, 44, 78, .05);
      transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
    }

    .category-page .article-card:hover {
      border-color: #b7c8e3;
      box-shadow: var(--shadow);
      transform: translateY(-2px);
    }

    .category-page .article-cover {
      position: relative;
      min-height: 230px;
      overflow: hidden;
      background: #dfe7f3;
    }

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

    .category-page .article-card:hover .article-cover img {
      transform: scale(1.025);
    }

    .category-page .article-category {
      position: absolute;
      top: 14px;
      left: 14px;
      max-width: calc(100% - 28px);
      padding: 5px 9px;
      overflow: hidden;
      color: #ffffff;
      background: var(--primary);
      border-radius: 3px;
      font-size: 12px;
      font-weight: 700;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .category-page .article-body {
      min-width: 0;
      padding: 22px 24px 20px;
      display: flex;
      flex-direction: column;
    }

    .category-page .article-title {
      margin: 0 0 9px;
      color: #17233a;
      font-size: 21px;
      line-height: 1.4;
    }

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

    .category-page .article-summary {
      margin: 0;
      min-height: 4.8em;
      display: -webkit-box;
      overflow: hidden;
      color: #58667d;
      font-size: 14px;
      line-height: 1.6;
      -webkit-box-orient: vertical;
      -webkit-line-clamp: 3;
    }

    .category-page .article-meta {
      margin-top: 15px;
      display: flex;
      flex-wrap: wrap;
      gap: 7px 14px;
      color: #778297;
      font-size: 12px;
    }

    .category-page .article-tags {
      margin-top: 10px;
      color: var(--primary);
      font-size: 12px;
      overflow-wrap: anywhere;
    }

    .category-page .article-actions {
      margin-top: auto;
      padding-top: 16px;
      display: flex;
      align-items: center;
      justify-content: flex-end;
    }

    .category-page .read-more {
      min-height: 36px;
      padding: 7px 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      background: var(--primary);
      border-radius: 4px;
      font-size: 13px;
      font-weight: 700;
    }

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

    .category-page .category-sidebar {
      position: sticky;
      top: 24px;
      display: grid;
      gap: 18px;
    }

    .category-page .side-panel {
      padding: 22px;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 6px;
    }

    .category-page .side-panel h2 {
      margin: 0 0 14px;
      padding-bottom: 11px;
      color: var(--primary);
      border-bottom: 2px solid var(--primary);
      font-size: 17px;
    }

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

    .category-page .side-links {
      display: grid;
    }

    .category-page .side-links a {
      padding: 11px 2px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid #e7ebf1;
      font-size: 14px;
      font-weight: 600;
    }

    .category-page .side-links a::after {
      color: var(--primary);
      content: "›";
      font-size: 20px;
    }

    .category-page .side-links a:hover {
      color: var(--primary);
    }

    .category-page .risk-panel {
      border-top: 4px solid var(--accent);
    }

    .category-page .pagination {
      margin-top: 32px;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .category-page .pagination a {
      min-width: 40px;
      min-height: 40px;
      padding: 7px 12px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #364258;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 4px;
      font-size: 13px;
      font-weight: 700;
    }

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

    .footer {
      padding: 52px 0 0;
      color: #ccd5e4;
      background: #081a38;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.35fr repeat(3, 1fr);
      gap: 38px;
    }

    .footer h3,
    .footer-brand strong {
      margin: 0 0 15px;
      display: block;
      color: #ffffff;
      font-size: 16px;
    }

    .footer-brand strong {
      font-size: 22px;
    }

    .footer p {
      margin: 8px 0;
      color: #aebbd0;
      font-size: 13px;
    }

    .footer-grid > div > a {
      margin: 0 0 8px;
      display: block;
      color: #c5cede;
      font-size: 13px;
    }

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

    .footer-bottom {
      margin-top: 38px;
      padding: 18px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      color: #91a0b8;
      border-top: 1px solid rgba(255, 255, 255, .12);
      font-size: 12px;
    }

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

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

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

      .hamburger {
        display: flex;
      }

      .category-page .content-layout {
        grid-template-columns: minmax(0, 1fr) 250px;
        gap: 22px;
      }

      .category-page .article-card {
        grid-template-columns: 240px minmax(0, 1fr);
      }

      .category-page .article-cover {
        min-height: 245px;
      }
    }

    @media (max-width: 820px) {
      .category-page .content-layout {
        grid-template-columns: 1fr;
      }

      .category-page .category-sidebar {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

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

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

    @media (max-width: 680px) {
      .container {
        width: min(100% - 28px, 1180px);
      }

      .topbar .container {
        padding: 7px 0;
        align-items: flex-start;
        flex-direction: column;
        gap: 2px;
      }

      .topbar-links {
        width: 100%;
        align-items: flex-start;
        flex-direction: column;
        gap: 1px;
      }

      .logo {
        min-width: 0;
        font-size: 17px;
      }

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

      .member-btn {
        display: none;
      }

      .open-btn {
        padding: 7px 11px;
      }

      .category-page .category-head-inner {
        padding: 38px 0 36px;
      }

      .category-page .category-title {
        font-size: 32px;
      }

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

      .category-page .category-route {
        overflow-x: auto;
        padding-bottom: 8px;
      }

      .category-page .route-station {
        min-width: 104px;
      }

      .category-page .content-band {
        padding: 30px 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: 19px 18px;
      }

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

      .category-page .article-summary {
        min-height: 4.8em;
      }

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

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 26px;
      }
    }

    @media (max-width: 420px) {
      .logo span {
        max-width: 120px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .header-inner {
        gap: 10px;
      }

      .open-btn {
        display: none;
      }

      .category-page .pagination a {
        min-width: 36px;
        min-height: 36px;
        padding: 6px 10px;
      }
    }