:root {
      --brand: #0B3D91;
      --brand-dark: #082c68;
      --brand-soft: #eaf1fb;
      --green: #2f6b3c;
      --green-soft: #e9f2e8;
      --wood: #b78555;
      --wood-dark: #795333;
      --porcelain: #fffefa;
      --ink: #172033;
      --muted: #647084;
      --line: #dfe4ea;
      --surface: #ffffff;
      --page: #f6f7f8;
      --danger: #b42318;
      --shadow: 0 12px 30px rgba(23, 32, 51, .08);
      --radius: 8px;
      --container: 1180px;
    }

    * {
      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: 16px;
      line-height: 1.7;
    }

    body,
    button,
    input,
    textarea {
      letter-spacing: 0;
    }

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

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

    button {
      font: inherit;
    }

    .container {
      width: min(var(--container), calc(100% - 32px));
      margin: 0 auto;
    }

    .topbar {
      min-height: 36px;
      color: #eaf1fb;
      background: var(--brand-dark);
      font-size: 13px;
    }

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

    .topbar a {
      color: #ffffff;
    }

    .topbar a:hover {
      text-decoration: underline;
    }

    .header {
      position: relative;
      z-index: 40;
      background: rgba(255, 255, 255, .98);
      border-bottom: 1px solid var(--line);
    }

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

    .logo {
      min-width: 172px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--brand);
      font-size: 19px;
      font-weight: 800;
      line-height: 1.2;
    }

    .logo img {
      width: 42px;
      height: 42px;
      object-fit: contain;
      border-radius: 6px;
      background: #ffffff;
    }

    .main-nav {
      min-width: 0;
      flex: 1;
      align-self: stretch;
    }

    .nav-list {
      height: 100%;
      display: flex;
      align-items: stretch;
      justify-content: center;
      gap: 2px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .nav-list > li {
      position: relative;
      display: flex;
      align-items: stretch;
    }

    .nav-link {
      min-height: 76px;
      padding: 0 13px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #273247;
      font-size: 14px;
      font-weight: 700;
      white-space: nowrap;
      border-bottom: 3px solid transparent;
    }

    .nav-link:hover,
    .nav-list > li:focus-within > .nav-link {
      color: var(--brand);
      background: var(--brand-soft);
      border-bottom-color: var(--brand);
    }

    .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: 50;
      visibility: hidden;
      opacity: 0;
      pointer-events: none;
      transform: translateY(8px);
      transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
      background: #ffffff;
      border: 1px solid var(--line);
      border-top: 3px solid var(--brand);
      box-shadow: var(--shadow);
    }

    .dropdown-panel {
      width: 320px;
      padding: 18px;
    }

    .mega-menu {
      width: min(780px, calc(100vw - 32px));
      padding: 20px;
    }

    .nav-list > li:nth-last-child(-n+3) .mega-menu {
      right: 0;
      left: auto;
    }

    .nav-list > li:hover > .dropdown-panel,
    .nav-list > li:hover > .mega-menu,
    .nav-list > li:focus-within > .dropdown-panel,
    .nav-list > li:focus-within > .mega-menu {
      visibility: visible;
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }

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

    .drop-item {
      display: block;
      padding: 9px 10px;
      color: #344057;
      font-size: 14px;
      line-height: 1.45;
      border-radius: 5px;
    }

    .drop-item:hover {
      color: var(--brand);
      background: var(--brand-soft);
    }

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

    .mega-card {
      min-width: 0;
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px;
      border: 1px solid #e6eaf0;
      border-radius: 6px;
      background: #ffffff;
    }

    .mega-card:hover {
      border-color: #a8bee3;
      background: #f7faff;
    }

    .mega-card > img {
      width: 54px;
      height: 54px;
      flex: 0 0 54px;
      object-fit: cover;
      border-radius: 5px;
      background: #eef2f6;
    }

    .mega-card > span {
      min-width: 0;
      display: grid;
      gap: 3px;
    }

    .mega-card strong {
      overflow: hidden;
      color: #1c2940;
      font-size: 14px;
      line-height: 1.35;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

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

    .mega-footer {
      display: block;
      margin-top: 14px;
      padding: 10px 12px;
      color: #ffffff;
      background: var(--brand);
      border-radius: 5px;
      font-size: 13px;
      font-weight: 700;
      text-align: center;
    }

    .mega-footer:hover {
      background: var(--brand-dark);
    }

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

    .member-btn,
    .open-btn {
      min-height: 38px;
      padding: 0 15px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 5px;
      font-size: 13px;
      font-weight: 800;
      white-space: nowrap;
    }

    .member-btn {
      color: var(--brand);
      border: 1px solid #9eb7dd;
      background: #ffffff;
    }

    .open-btn {
      color: #ffffff;
      border: 1px solid var(--brand);
      background: var(--brand);
    }

    .member-btn:hover {
      background: var(--brand-soft);
    }

    .open-btn:hover {
      background: var(--brand-dark);
    }

    .hamburger {
      width: 42px;
      height: 42px;
      padding: 0;
      display: none;
      position: relative;
      border: 1px solid var(--line);
      border-radius: 5px;
      background: #ffffff;
      cursor: pointer;
    }

    .hamburger span {
      position: absolute;
      left: 10px;
      width: 20px;
      height: 2px;
      background: var(--ink);
      transition: transform .2s ease, opacity .2s ease;
    }

    .hamburger span:nth-child(1) {
      top: 13px;
    }

    .hamburger span:nth-child(2) {
      top: 19px;
    }

    .hamburger span:nth-child(3) {
      top: 25px;
    }

    .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: 80;
      visibility: hidden;
      opacity: 0;
      background: rgba(13, 21, 36, .58);
      transition: opacity .22s ease, visibility .22s ease;
    }

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

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      z-index: 90;
      width: min(390px, 88vw);
      overflow-y: auto;
      transform: translateX(100%);
      background: #ffffff;
      box-shadow: -18px 0 36px rgba(0, 0, 0, .16);
      transition: transform .24s ease;
    }

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

    .drawer-head {
      min-height: 70px;
      padding: 12px 16px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto auto;
      align-items: center;
      gap: 10px;
      color: #ffffff;
      background: var(--brand);
    }

    .drawer-head > span {
      min-width: 0;
      overflow-wrap: anywhere;
      font-weight: 700;
    }

    .drawer-head > a {
      padding: 7px 11px;
      border: 1px solid rgba(255, 255, 255, .55);
      border-radius: 4px;
      font-size: 13px;
      font-weight: 700;
    }

    .drawer-close {
      width: 38px;
      height: 38px;
      padding: 0;
      color: #ffffff;
      border: 0;
      background: transparent;
      font-size: 28px;
      line-height: 1;
      cursor: pointer;
    }

    .drawer-menu {
      padding: 10px 16px 28px;
    }

    .drawer-link,
    .drawer-toggle {
      width: 100%;
      min-height: 48px;
      padding: 0 4px;
      display: flex;
      align-items: center;
      color: #253149;
      border: 0;
      border-bottom: 1px solid #e8ebef;
      background: transparent;
      font-size: 15px;
      font-weight: 700;
      text-align: left;
      cursor: pointer;
    }

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

    .drawer-toggle::after {
      content: "+";
      color: var(--brand);
      font-size: 20px;
      font-weight: 400;
    }

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

    .drawer-submenu {
      display: none;
      padding: 7px 0 10px 14px;
      border-bottom: 1px solid #e8ebef;
      background: #f8fafc;
    }

    .drawer-submenu.open {
      display: grid;
    }

    .drawer-submenu a {
      padding: 9px 10px;
      color: #536078;
      font-size: 13px;
      line-height: 1.45;
      border-radius: 4px;
    }

    .drawer-submenu a:hover {
      color: var(--brand);
      background: var(--brand-soft);
    }

    .article-page {
      min-width: 0;
      padding-bottom: 72px;
    }

    .article-page .article-banner {
      color: #ffffff;
      background:
        linear-gradient(rgba(8, 44, 104, .94), rgba(11, 61, 145, .9)),
        repeating-linear-gradient(90deg, transparent 0 39px, rgba(255, 255, 255, .04) 40px);
      border-bottom: 5px solid var(--wood);
    }

    .article-page .article-banner-inner {
      padding: 28px 0 32px;
    }

    .article-page .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 7px;
      margin-bottom: 20px;
      color: #dbe7f9;
      font-size: 13px;
    }

    .article-page .breadcrumb a:hover {
      color: #ffffff;
      text-decoration: underline;
    }

    .article-page .article-kicker {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 4px 10px;
      margin-bottom: 12px;
      color: #173a20;
      background: #dcebd8;
      border-left: 4px solid var(--green);
      border-radius: 3px;
      font-size: 12px;
      font-weight: 800;
    }

    .article-page .article-title {
      max-width: 940px;
      margin: 0;
      color: #ffffff;
      font-size: clamp(28px, 4vw, 46px);
      line-height: 1.25;
      overflow-wrap: anywhere;
    }

    .article-page .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 9px 20px;
      margin-top: 18px;
      color: #e2eaf6;
      font-size: 13px;
    }

    .article-page .article-meta span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .article-page .article-meta span::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #9ac17e;
    }

    .article-page .article-shell {
      min-width: 0;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 310px;
      gap: 28px;
      align-items: start;
      padding-top: 34px;
    }

    .article-page .article-main,
    .article-page .article-aside {
      min-width: 0;
    }

    .article-page .article-paper {
      min-width: 0;
      padding: 34px clamp(20px, 4vw, 48px);
      background: var(--porcelain);
      border: 1px solid #e1e4e8;
      border-top: 5px solid var(--wood);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    .article-page .article-summary {
      margin: 0 0 28px;
      padding: 18px 20px;
      color: #384457;
      background: var(--green-soft);
      border-left: 4px solid var(--green);
      border-radius: 4px;
      font-size: 16px;
      line-height: 1.85;
    }

    .article-page .article-content {
      min-width: 0;
      max-width: 100%;
      overflow-x: auto;
      color: #273247;
      font-size: 17px;
      line-height: 1.9;
      overflow-wrap: anywhere;
    }

    .article-page .article-content h1,
    .article-page .article-content h2,
    .article-page .article-content h3,
    .article-page .article-content h4 {
      color: #14223a;
      line-height: 1.4;
    }

    .article-page .article-content h2 {
      margin: 36px 0 16px;
      padding-bottom: 10px;
      border-bottom: 2px solid #e2e8f0;
      font-size: 25px;
    }

    .article-page .article-content h3 {
      margin: 28px 0 12px;
      font-size: 20px;
    }

    .article-page .article-content p {
      margin: 0 0 20px;
    }

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

    .article-page .article-content img,
    .article-page .article-content video,
    .article-page .article-content iframe {
      max-width: 100%;
      height: auto;
      margin: 24px auto;
      border-radius: 6px;
    }

    .article-page .article-content table {
      width: 100%;
      max-width: 100%;
      border-collapse: collapse;
    }

    .article-page .article-content th,
    .article-page .article-content td {
      padding: 10px 12px;
      border: 1px solid #dfe4ea;
      text-align: left;
    }

    .article-page .article-content th {
      background: #eef3f9;
    }

    .article-page .article-content blockquote {
      margin: 24px 0;
      padding: 16px 20px;
      color: #344057;
      background: #f4f6f8;
      border-left: 4px solid var(--wood);
    }

    .article-page .article-tags {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 9px;
      margin-top: 30px;
      padding-top: 22px;
      border-top: 1px solid var(--line);
      color: var(--muted);
      font-size: 14px;
    }

    .article-page .article-tags strong {
      color: var(--ink);
    }

    .article-page .article-tags a {
      padding: 5px 10px;
      color: var(--brand);
      background: var(--brand-soft);
      border: 1px solid #c9d8ef;
      border-radius: 4px;
    }

    .article-page .article-notice {
      margin-top: 24px;
      padding: 14px 16px;
      color: #605340;
      background: #fff8eb;
      border: 1px solid #ead5ad;
      border-radius: 5px;
      font-size: 13px;
    }

    .article-page .article-pagination {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
      margin-top: 22px;
    }

    .article-page .article-pagination a {
      min-width: 0;
      padding: 16px 18px;
      display: grid;
      gap: 5px;
      color: #253149;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 6px;
    }

    .article-page .article-pagination a:last-child {
      text-align: right;
    }

    .article-page .article-pagination a:hover {
      color: var(--brand);
      border-color: #9eb7dd;
      box-shadow: 0 8px 20px rgba(11, 61, 145, .08);
    }

    .article-page .article-pagination span {
      color: var(--muted);
      font-size: 12px;
      font-weight: 700;
    }

    .article-page .article-pagination strong {
      overflow: hidden;
      font-size: 14px;
      line-height: 1.5;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .article-page .aside-panel {
      margin-bottom: 18px;
      padding: 20px;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
    }

    .article-page .aside-panel.wood-panel {
      background:
        linear-gradient(rgba(255, 254, 250, .95), rgba(255, 254, 250, .95)),
        repeating-linear-gradient(0deg, var(--wood) 0 2px, transparent 2px 24px);
      border-top: 5px solid var(--wood);
    }

    .article-page .aside-title {
      margin: 0 0 13px;
      color: #1b2840;
      font-size: 17px;
      line-height: 1.4;
    }

    .article-page .decision-steps {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .article-page .decision-steps li {
      display: grid;
      grid-template-columns: 34px minmax(0, 1fr);
      gap: 10px;
      align-items: center;
      color: #465269;
      font-size: 13px;
    }

    .article-page .decision-steps b {
      width: 34px;
      height: 34px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      background: var(--green);
      border-radius: 50%;
      font-size: 12px;
    }

    .article-page .aside-links {
      display: grid;
    }

    .article-page .aside-links a {
      padding: 10px 0;
      color: #465269;
      border-bottom: 1px solid #eaedf1;
      font-size: 14px;
    }

    .article-page .aside-links a:last-child {
      border-bottom: 0;
    }

    .article-page .aside-links a:hover {
      color: var(--brand);
    }

    .article-page .risk-box {
      color: #ffffff;
      background: var(--brand);
      border-color: var(--brand);
    }

    .article-page .risk-box .aside-title {
      color: #ffffff;
    }

    .article-page .risk-box p {
      margin: 0;
      color: #dfe9f8;
      font-size: 13px;
      line-height: 1.75;
    }

    .article-page .related-section {
      margin-top: 42px;
    }

    .article-page .section-heading {
      margin-bottom: 18px;
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 16px;
    }

    .article-page .section-heading h2 {
      margin: 0;
      color: #17243b;
      font-size: 25px;
    }

    .article-page .section-heading a {
      color: var(--brand);
      font-size: 13px;
      font-weight: 800;
    }

    .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: #ffffff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      transition: transform .18s ease, box-shadow .18s ease;
    }

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

    .article-page .related-card img {
      width: 100%;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      background: #e9edf2;
    }

    .article-page .related-body {
      min-width: 0;
      padding: 16px;
    }

    .article-page .related-body h3 {
      min-height: 48px;
      margin: 0 0 9px;
      overflow: hidden;
      color: #1c2940;
      font-size: 16px;
      line-height: 1.5;
    }

    .article-page .related-body p {
      min-height: 63px;
      margin: 0 0 12px;
      overflow: hidden;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.6;
    }

    .article-page .related-meta {
      display: flex;
      justify-content: space-between;
      gap: 10px;
      color: #7b8494;
      font-size: 12px;
    }

    .footer {
      color: #d7deea;
      background: #142039;
      border-top: 5px solid var(--wood);
    }

    .footer .container {
      padding-top: 48px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.35fr 1fr 1fr 1fr;
      gap: 34px;
      padding-bottom: 36px;
    }

    .footer-brand {
      margin-bottom: 12px;
      color: #ffffff;
      font-size: 21px;
      font-weight: 800;
    }

    .footer h3 {
      margin: 0 0 14px;
      color: #ffffff;
      font-size: 15px;
    }

    .footer p {
      margin: 0 0 10px;
      color: #b9c3d3;
      font-size: 13px;
      line-height: 1.75;
    }

    .footer-grid > div > a {
      display: block;
      width: fit-content;
      margin-bottom: 9px;
      color: #c7d1df;
      font-size: 13px;
    }

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

    .footer-social {
      margin-top: 16px;
      color: #ffffff;
    }

    .footer-bottom {
      padding: 18px 0 22px;
      color: #9ca9bb;
      border-top: 1px solid rgba(255, 255, 255, .11);
      font-size: 12px;
      text-align: center;
    }

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

      .hamburger {
        display: block;
      }

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

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

      .article-page .article-shell {
        grid-template-columns: minmax(0, 1fr) 280px;
      }
    }

    @media (max-width: 860px) {
      .article-page .article-shell {
        grid-template-columns: 1fr;
      }

      .article-page .article-aside {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
      }

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

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

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

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

      .topbar .container {
        padding: 7px 0;
        align-items: flex-start;
        flex-direction: column;
        gap: 1px;
      }

      .topbar .contact {
        overflow-wrap: anywhere;
      }

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

      .logo {
        min-width: 0;
        max-width: 48%;
        font-size: 15px;
      }

      .logo img {
        width: 36px;
        height: 36px;
        flex: 0 0 36px;
      }

      .member-btn {
        display: none;
      }

      .open-btn {
        min-height: 36px;
        padding: 0 11px;
      }

      .hamburger {
        width: 38px;
        height: 38px;
      }

      .hamburger span {
        left: 8px;
      }

      .article-page .article-banner-inner {
        padding: 22px 0 26px;
      }

      .article-page .article-title {
        font-size: 28px;
      }

      .article-page .article-shell {
        padding-top: 20px;
      }

      .article-page .article-paper {
        padding: 22px 17px;
      }

      .article-page .article-content {
        font-size: 16px;
      }

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

      .article-page .article-pagination a:last-child {
        text-align: left;
      }

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

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

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

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .footer .container {
        padding-top: 34px;
      }
    }