:root {
      --bg_color: #eef2f4;
      --current_category_color: #000;
      --card_title_text_color: #000;
      --timeline_color: #666;
      --border_color: #f0f0f0;
      --header_height: 64px;
      --header_current_category_color: #fff;
      --header_bg_color: #0eb0c9;
      --header_bg_color_dark: #0eb0c9;
      --header_li_color: #fff;
      --header_li_active_bg: #fff;
      --header_li_active_color: #0eb0c9;
      --header_li_font_active_color: #0eb0c9;
      --footer_border_color: #e8ecef;
      --content_max: 960px;
      --shell_radius: 14px;
    }

    *, *::before, *::after { box-sizing: border-box; }

    html, body {
      margin: 0;
      padding: 0;
      min-height: 100%;
      overflow-x: hidden;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      font-size: 12px;
      line-height: 1.5;
      background: var(--bg_color);
      color: var(--card_title_text_color);
    }

    a { color: inherit; text-decoration: none; }
    ul { list-style: none; margin: 0; padding: 0; }
    h1, h2, h3, p, time { margin: 0; }

    /* ----- Header ----- */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 99;
      height: var(--header_height);
      background: var(--header_bg_color);
      box-shadow: none;
      border-bottom: none;
      overflow: visible;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: flex-start;
      gap: 12px;
      max-width: 1200px;
      height: var(--header_height);
      margin: 0 auto;
      padding: 0 24px;
    }

    .header-brand {
      display: flex;
      align-items: center;
      gap: 14px;
      min-width: 0;
      flex-shrink: 0;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      min-height: 36px;
      padding: 4px 0;
      background: none;
      font-size: 22px;
      font-weight: 800;
      letter-spacing: -0.03em;
      line-height: 1.25;
      color: #fff;
      text-decoration: none;
      white-space: nowrap;
      overflow: visible;
    }

    .logo__img {
      display: block;
      height: 32px;
      width: auto;
      max-width: 140px;
      object-fit: contain;
    }

    .header-divider {
      display: block;
      width: 1px;
      height: 22px;
      background: rgba(255, 255, 255, 0.45);
      flex-shrink: 0;
    }

    .current-category {
      font-size: 17px;
      font-weight: 400;
      color: var(--header_current_category_color);
      letter-spacing: 0.01em;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      max-width: 200px;
    }

    .category-nav {
      display: none;
      flex: 1;
      min-width: 0;
      justify-content: center;
      margin: 0 8px;
    }

    .category-nav .taps {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      overflow-x: auto;
      overflow-y: visible;
      white-space: nowrap;
      padding: 0;
      margin: 0;
      border: none;
      border-radius: 0;
      background: transparent;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }

    .category-nav .taps::-webkit-scrollbar {
      display: none;
      width: 0;
      height: 0;
    }

    .category-nav .taps li {
      display: flex;
      flex-shrink: 0;
      margin: 0;
      padding: 0;
    }

    .category-nav .taps a,
    .category-nav .nav-more-btn {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 7px 14px;
      font-size: 14px;
      font-weight: 500;
      line-height: 1.2;
      color: var(--header_li_color);
      border-radius: 999px;
      border: none;
      background: transparent;
      cursor: pointer;
      font-family: inherit;
      transition: color 0.2s ease, background 0.2s ease;
    }

    .category-nav .taps a:hover,
    .category-nav .nav-more-btn:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.14);
    }

    .category-nav .taps li.active a,
    .category-nav .header-more.is-active .nav-more-btn {
      background: var(--header_li_active_bg);
      color: var(--header_li_active_color);
      box-shadow: none;
      font-weight: 600;
    }

    .category-nav .taps li.header-more {
      position: relative;
      flex-direction: column;
      align-items: flex-end;
    }

    .header-more {
      position: relative;
    }

    .nav-more-details {
      position: relative;
    }

    .nav-more-btn {
      list-style: none;
    }

    .nav-more-btn::-webkit-details-marker {
      display: none;
    }

    .nav-more-chevron {
      display: block;
      margin-top: 1px;
      color: currentColor;
    }

    .nav-more-menu {
      display: none;
      position: absolute;
      top: calc(100% + 8px);
      right: 0;
      min-width: 168px;
      margin: 0;
      padding: 6px;
      list-style: none;
      background: #fff;
      border: 1px solid #e0e8ec;
      border-radius: 10px;
      z-index: 200;
      pointer-events: auto;
    }

    .nav-more-details[open] .nav-more-menu {
      display: block;
      visibility: visible;
      opacity: 1;
    }

    /* 下拉项在 .taps 内，需覆盖顶栏白色链接样式 */
    .category-nav .nav-more-menu li {
      display: block;
      width: 100%;
      flex-shrink: 0;
    }

    .category-nav .nav-more-menu a {
      display: block;
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      font-weight: 500;
      line-height: 1.3;
      color: #333;
      background: transparent;
      border-radius: 8px;
      white-space: nowrap;
    }

    .category-nav .nav-more-menu a:hover {
      background: #f0f7f9;
      color: var(--header_bg_color);
    }

    .category-nav .nav-more-menu li.active a {
      background: #e6f7fa;
      color: var(--header_bg_color);
      font-weight: 600;
    }

    .header-actions {
      display: none;
      align-items: center;
      gap: 4px;
      flex-shrink: 0;
      margin-left: auto;
    }

    a.header-icon-btn {
      text-decoration: none;
    }

    .header-icon-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      padding: 0;
      border: none;
      border-radius: 50%;
      background: transparent;
      color: #fff;
      cursor: pointer;
      transition: background 0.2s ease;
    }

    .header-icon-btn:hover {
      background: rgba(255, 255, 255, 0.14);
    }

    .menu-list a {
      color: inherit;
      display: block;
    }

    .menu-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      padding: 0;
      border: none;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.14);
      cursor: pointer;
      flex-shrink: 0;
      transition: background 0.2s ease;
    }

    .menu-btn:hover {
      background: rgba(255, 255, 255, 0.22);
    }

    .menu-btn svg path {
      fill: #fff;
    }

    @media (min-width: 1025px) {
      .header,
      .header-inner,
      .category-nav {
        overflow: visible;
      }

      .category-nav {
        display: flex;
      }

      .category-nav .taps {
        overflow: visible;
      }

      .header-actions {
        display: flex;
      }

      .menu-btn {
        display: none;
      }

      .current-category {
        max-width: 240px;
      }
    }

    @media (max-width: 1024px) {
      .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        padding: 0 12px 0 8px;
      }

      .header-brand {
        flex: 1;
        justify-content: flex-start;
        gap: 10px;
        min-width: 0;
      }

      .header-divider {
        display: block;
        height: 18px;
      }

      .logo {
        font-size: 18px;
        min-height: 32px;
        padding: 2px 0;
      }

      .logo__img {
        height: 28px;
        max-width: 120px;
      }

      .current-category {
        font-size: 16px;
        max-width: none;
      }

      .category-nav,
      .header-actions {
        display: none;
      }

      .menu-btn {
        flex-shrink: 0;
      }
    }

    /* Mobile menu */
    .menu-overlay {
      display: none;
      position: fixed;
      inset: 0;
      top: var(--header_height);
      z-index: 98;
      background: linear-gradient(
        180deg,
        var(--header_bg_color_dark) 0%,
        #087f92 100%
      );
      padding: 16px 20px 32px;
      overflow-y: auto;
    }

    .menu-overlay.open {
      display: block;
    }

    .menu-close {
      display: flex;
      justify-content: flex-end;
      align-items: center;
      width: 100%;
      height: 44px;
      margin-bottom: 12px;
      border: none;
      background: none;
      cursor: pointer;
    }

    .menu-close svg path {
      stroke: #fff;
    }

    .menu-list ul {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .menu-list li {
      border-radius: 12px;
      overflow: hidden;
    }

    .menu-list li a {
      padding: 14px 18px;
      font-size: 17px;
      font-weight: 700;
      color: rgba(255, 255, 255, 0.92);
      transition: background 0.2s ease, color 0.2s ease;
    }

    .menu-list li a:hover {
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
    }

    .menu-list li.active a {
      background: var(--header_li_active_bg);
      color: var(--header_li_active_color);
      box-shadow: none;
    }

    /* 移动端菜单展平全部分类，不显示 More 下拉 */
    .menu-list .header-more {
      list-style: none;
    }

    .menu-list .nav-more-btn {
      display: none;
    }

    .menu-list .nav-more-menu {
      position: static;
      display: flex;
      flex-direction: column;
      gap: 4px;
      padding: 0;
      margin: 0;
      background: transparent;
      border: none;
      box-shadow: none;
      opacity: 1;
      visibility: visible;
      transform: none;
      pointer-events: auto;
    }

    .menu-list .nav-more-menu li a {
      padding: 14px 18px;
      font-size: 17px;
      font-weight: 700;
      color: rgba(255, 255, 255, 0.92);
    }

    /* ----- Main layout ----- */
    .page {
      padding-top: calc(var(--header_height) + 20px);
      padding-bottom: 32px;
    }

    .content-shell {
      max-width: var(--content_max);
      margin: 0 auto;
      padding: 0 16px;
      width: 100%;
    }

    .content-shell {
      border-radius: var(--shell_radius);
      overflow: hidden;
      background: #fff;
    }

    .content-shell > .content {
      background: #fff;
      border-radius: 0;
      box-shadow: none;
      overflow: hidden;
    }

    .content {
      max-width: 100%;
      margin: 0 auto;
      padding: 0;
      width: 100%;
    }

    .content-list-pc {
      width: 100%;
      padding-bottom: 4px;
    }

    .row-content {
      display: flex;
      flex-wrap: wrap;
      width: 100%;
      align-items: stretch;
      gap: 12px;
      padding: 16px 16px 8px;
      box-sizing: border-box;
    }

    /* ----- Cards ----- */
    .card {
      display: flex;
      color: inherit;
      box-sizing: border-box;
      text-decoration: none;
      transition: opacity 0.15s ease;
    }

    .card:hover {
      opacity: 0.92;
    }

    /* Featured hero cards */
    .card--big {
      display: block;
      flex: 0 0 calc(50% - 6px);
      max-width: calc(50% - 6px);
      min-width: 0;
      width: calc(50% - 6px);
      border: none;
    }

    .card--big .card-media {
      position: relative;
      display: block;
      width: 100%;
      aspect-ratio: 429 / 237;
      min-height: 0;
      border-radius: 12px;
      overflow: hidden;
      background: #1a2a32;
    }

    .card--big .card-media > img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .card--big .card-overlay {
      position: absolute;
      inset: 0;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 14px 16px 16px;
      background: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0) 35%,
        rgba(0, 0, 0, 0.55) 70%,
        rgba(0, 0, 0, 0.82) 100%
      );
    }

    .card-tag {
      display: inline-block;
      align-self: flex-start;
      margin-bottom: 8px;
      padding: 4px 10px;
      font-size: 10px;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: #fff;
      background: var(--header_bg_color);
      border-radius: 4px;
      line-height: 1.2;
    }

    .card--big .card-title {
      margin: 0 0 8px;
      font-size: 15px;
      font-weight: 700;
      line-height: 1.35;
      color: #fff;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .card-meta {
      display: flex;
      align-items: center;
      gap: 6px;
      margin: 0;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.92);
    }

    .card-meta .card-time {
      font-size: 13px;
      color: inherit;
    }

    .card-clock {
      flex-shrink: 0;
      color: currentColor;
    }

    /* List rows */
    .card--list {
      flex: 0 0 100%;
      width: 100%;
      align-items: center;
      gap: 14px;
      padding: 18px 16px;
      border-bottom: 1px solid var(--border_color);
      min-height: 124px;
    }

    .content-list-pc > .card--list:last-of-type {
      border-bottom: none;
    }

    .card--list .card-icon {
      position: relative;
      flex-shrink: 0;
      width: 132px;
      min-width: 132px;
      height: 88px;
      border-radius: 8px;
      overflow: hidden;
      background: #f0f0f0;
    }

    .card--list .card-icon img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .card--list .card-main {
      flex: 1;
      min-width: 0;
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 4px;
      padding: 0;
    }

    .card-topic {
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--header_bg_color);
      line-height: 1.2;
      min-height: 1.2em;
    }

    .card--list .card-title {
      margin: 0;
      font-size: 15px;
      font-weight: 700;
      line-height: 1.35;
      min-height: calc(1.35em * 2);
      color: var(--card_title_text_color);
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .card--list .card-time {
      font-size: 13px;
      color: var(--timeline_color);
      line-height: 1.3;
    }

    .card-arrow-wrap {
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 24px;
      color: #c8d0d6;
    }

    .card-arrow {
      display: block;
    }

    @media (max-width: 767px) {
      .row-content {
        flex-direction: column;
        padding: 12px 12px 4px;
        gap: 10px;
      }

      .card--big {
        flex: none;
        width: 100%;
        max-width: 100%;
      }

      .card--big .card-media {
        min-height: calc((100vw - 40px) * 237 / 429);
        max-height: 420px;
      }

      .card--list {
        padding: 14px 12px;
        gap: 10px;
        min-height: 110px;
        align-items: flex-start;
      }

      .card--list .card-icon {
        width: 108px;
        min-width: 108px;
        height: 76px;
      }

      .card--list .card-main {
        min-height: 76px;
      }
    }

    /* ----- Footer ----- */
    .footer {
      position: static;
      width: 100%;
      max-width: none;
      margin: 16px 0 0;
      padding: 0 0 32px;
      background: #e8ecef;
      border-top: 1px solid #dde3e7;
      box-sizing: border-box;
      min-height: 72px;
    }

    .footer-inner {
      width: 100%;
      max-width: var(--content_max);
      margin: 0 auto;
      padding: 18px 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 12px 24px;
      background: transparent;
      border: none;
      border-radius: 0;
      box-sizing: border-box;
    }

    .footer-copy {
      margin: 0;
      font-size: 13px;
      color: #5c6b73;
      line-height: 1.4;
    }

    .footer-links {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .footer-links a {
      font-size: 13px;
      font-weight: 600;
      color: #3d4f58;
      text-decoration: none;
    }

    .footer-links a:hover {
      color: var(--header_bg_color);
    }

    @media (max-width: 600px) {
      .footer-inner {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 16px;
      }

      .footer-links {
        justify-content: center;
        flex-wrap: wrap;
        gap: 12px 20px;
      }
    }

    .content-loading {
      padding: 24px 0;
      text-align: center;
      color: var(--timeline_color);
      font-size: 14px;
      min-height: 200px;
    }

    .feed-sentinel {
      height: 1px;
      width: 100%;
      pointer-events: none;
    }

    .feed-loading {
      min-height: 0;
      padding: 0;
      margin: 0;
      height: 0;
      overflow: hidden;
    }

    .feed-loading[aria-hidden="false"] {
      min-height: 80px;
      padding: 24px 0;
      height: auto;
      overflow: visible;
    }

    .feed-sentinel {
      margin-top: 8px;
    }