/* roulang page: index */
/* CSS 设计变量与基础重构 */
    :root {
      --primary-color: #F26419;
      --primary-hover: #D94E07;
      --primary-subtle: #FFF2EB;
      --accent-yellow: #F6AE2D;
      --accent-navy: #2F4858;
      --accent-green: #38B000;
      --bg-body: #FDFBF7;
      --bg-card: #FFFFFF;
      --bg-dark: #1A1D20;
      --text-main: #1E2124;
      --text-muted: #555B62;
      --text-light: #8C929A;
      --border-color: #EFE9E0;
      --border-focus: #F26419;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-pill: 999px;
      --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 12px 28px rgba(242, 100, 25, 0.12);
      --shadow-dark: 0 10px 30px rgba(0, 0, 0, 0.15);
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      background-color: var(--bg-body);
      color: var(--text-main);
      line-height: 1.65;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease;
    }

    /* 顶部导航栏重设 */
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1030;
      transition: all 0.3s ease;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .brand-logo svg {
      width: 34px;
      height: 34px;
      fill: var(--primary-color);
    }
    .nav-link {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-main) !important;
      padding: 0.5rem 1rem !important;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-color) !important;
      background-color: var(--primary-subtle);
    }
    .status-badge-nav {
      background: #EDF9E8;
      border: 1px solid #C8E6C9;
      color: var(--accent-green);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background-color: var(--accent-green);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 0 2px rgba(56, 176, 0, 0.25);
      animation: pulse-green 2s infinite;
    }
    @keyframes pulse-green {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 176, 0, 0.5); }
      70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(56, 176, 0, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 176, 0, 0); }
    }

    /* 按钮样式重写 */
    .btn-brand {
      background-color: var(--primary-color);
      color: #FFFFFF !important;
      font-weight: 600;
      border-radius: var(--radius-pill);
      padding: 0.65rem 1.6rem;
      border: none;
      box-shadow: 0 4px 14px rgba(242, 100, 25, 0.25);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-brand:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(242, 100, 25, 0.35);
    }
    .btn-outline-brand {
      background: #FFFFFF;
      color: var(--primary-color) !important;
      border: 1.5px solid var(--primary-color);
      font-weight: 600;
      border-radius: var(--radius-pill);
      padding: 0.6rem 1.4rem;
      transition: all 0.2s ease;
    }
    .btn-outline-brand:hover {
      background-color: var(--primary-subtle);
      color: var(--primary-hover) !important;
    }

    /* 通用板块与排版 */
    section {
      padding: 4.5rem 0;
      position: relative;
    }
    .section-title-wrap {
      margin-bottom: 2.75rem;
    }
    .section-tag {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary-color);
      background-color: var(--primary-subtle);
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      display: inline-block;
      margin-bottom: 0.75rem;
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }
    .section-heading {
      font-size: 1.95rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 0.85rem;
      letter-spacing: -0.3px;
    }
    .section-lead {
      color: var(--text-muted);
      font-size: 1.02rem;
      line-height: 1.65;
      max-width: 820px;
    }

    /* 通用卡片规范 */
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      box-shadow: var(--shadow-soft);
      height: 100%;
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(242, 100, 25, 0.3);
    }
    .feature-card-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 1rem;
    }

    /* Hero API 开发者架构板块 */
    .hero-section {
      padding: 4rem 0 3.5rem;
      background: linear-gradient(180deg, #FFFFFF 0%, #FFFDF9 100%);
      border-bottom: 1px solid var(--border-color);
    }
    .code-console-box {
      background: #111417;
      border-radius: var(--radius-md);
      border: 1px solid #2A3036;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
      overflow: hidden;
    }
    .code-console-header {
      background: #1A1E24;
      padding: 10px 16px;
      display: flex;
      align-items: center;
      gap: 8px;
      border-bottom: 1px solid #2A3036;
    }
    .mac-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      display: inline-block;
    }
    .mac-dot.red { background: #FF5F56; }
    .mac-dot.yellow { background: #FFBD2E; }
    .mac-dot.green { background: #27C93F; }
    .code-console-body {
      padding: 20px;
      font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
      font-size: 0.88rem;
      color: #D6DEEB;
      line-height: 1.7;
    }
    .code-hl-kwd { color: #F26419; font-weight: 600; }
    .code-hl-str { color: #ADDB67; }
    .code-hl-val { color: #F6AE2D; }
    .code-hl-comment { color: #637777; font-style: italic; }

    /* 板块一：实时监控台指标卡 */
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-top: 4px solid var(--primary-color);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      box-shadow: var(--shadow-soft);
      position: relative;
    }
    .metric-val {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -1px;
      line-height: 1.2;
    }
    .metric-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 板块二：货架式矩阵 */
    .shelf-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: all 0.25s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .shelf-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .shelf-badge-bar {
      padding: 12px 16px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .shelf-pill {
      font-size: 0.72rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: var(--radius-pill);
    }
    .shelf-pill-orange { background: #FFF2EB; color: #F26419; }
    .shelf-pill-blue { background: #EAF4F4; color: #2F4858; }
    .shelf-pill-green { background: #EAF7E8; color: #38B000; }

    /* 板块三：性能对比表包装 */
    .compare-table-wrapper {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-soft);
      overflow: hidden;
    }
    .compare-table {
      margin-bottom: 0;
      width: 100%;
    }
    .compare-table th, .compare-table td {
      padding: 1rem 1.25rem;
      vertical-align: middle;
      border-color: #F0EDE8;
    }
    .compare-table thead th {
      background: #FAF8F5;
      font-weight: 700;
      color: var(--text-main);
      font-size: 0.92rem;
    }
    .highlight-col {
      background: #FFFDF9;
      font-weight: 600;
      color: var(--primary-color);
    }

    /* 板块四：时间线步进图 */
    .timeline-stream {
      position: relative;
      padding-left: 28px;
    }
    .timeline-stream::before {
      content: '';
      position: absolute;
      left: 7px;
      top: 10px;
      bottom: 10px;
      width: 2px;
      background: #E8DFD5;
    }
    .timeline-node {
      position: relative;
      margin-bottom: 2rem;
    }
    .timeline-node:last-child {
      margin-bottom: 0;
    }
    .timeline-dot {
      position: absolute;
      left: -28px;
      top: 4px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: #FFFFFF;
      border: 4px solid var(--primary-color);
      box-shadow: 0 0 0 3px rgba(242, 100, 25, 0.2);
    }

    /* 板块五：双栏图文资讯 */
    .news-spotlight {
      background: linear-gradient(135deg, #2F4858 0%, #1A1D20 100%);
      color: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 2.25rem;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
    }
    .news-item-link {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.2rem;
      margin-bottom: 0.9rem;
      display: block;
      transition: all 0.2s ease;
    }
    .news-item-link:hover {
      border-color: var(--primary-color);
      transform: translateX(4px);
    }

    /* 板块八：手风琴覆盖样式 */
    .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md) !important;
      margin-bottom: 0.9rem;
      overflow: hidden;
    }
    .accordion-button {
      font-weight: 700;
      color: var(--text-main);
      padding: 1.15rem 1.25rem;
      background-color: var(--bg-card);
      box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
      color: var(--primary-color);
      background-color: var(--primary-subtle);
    }
    .accordion-body {
      color: var(--text-muted);
      line-height: 1.7;
      padding: 1.25rem;
      background-color: #FFFDFB;
    }

    /* 板块九：订阅转化区 */
    .subscription-banner {
      background: linear-gradient(135deg, #1F2428 0%, #16191C 100%);
      border: 2px solid var(--primary-color);
      border-radius: var(--radius-lg);
      padding: 3rem 2rem;
      box-shadow: var(--shadow-dark);
      color: #FFFFFF;
    }
    .custom-input {
      height: 48px;
      border-radius: var(--radius-sm);
      border: 1px solid #3E454D;
      background: #2B3138;
      color: #FFFFFF;
      padding: 0 1rem;
    }
    .custom-input:focus {
      background: #2F3740;
      color: #FFFFFF;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(242, 100, 25, 0.25);
      outline: none;
    }

    /* 板块十一：热搜索引词云 */
    .cloud-badge {
      display: inline-block;
      padding: 6px 14px;
      margin: 4px;
      font-size: 0.88rem;
      font-weight: 600;
      border-radius: var(--radius-pill);
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      transition: all 0.2s ease;
    }
    .cloud-badge:hover {
      background: var(--primary-color);
      color: #FFFFFF;
      border-color: var(--primary-color);
      transform: translateY(-2px);
    }

    /* 页脚设计 */
    .site-footer {
      background-color: var(--bg-dark);
      color: #9CA3AF;
      padding: 4rem 0 2rem;
      border-top: 4px solid var(--primary-color);
      font-size: 0.88rem;
    }
    .footer-title {
      color: #FFFFFF;
      font-weight: 700;
      font-size: 1.05rem;
      margin-bottom: 1.2rem;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 0.6rem;
    }
    .footer-links a:hover {
      color: var(--primary-color);
    }
    .footer-bottom {
      border-top: 1px solid #2D3339;
      padding-top: 1.5rem;
      margin-top: 3rem;
      text-align: center;
      color: #6B7280;
    }

    /* 响应式断点微调 */
    @media (max-width: 991.98px) {
      .section-heading { font-size: 1.65rem; }
      section { padding: 3.5rem 0; }
    }
    @media (max-width: 767.98px) {
      .hero-section { padding: 2.5rem 0 2rem; }
      .metric-card { margin-bottom: 1rem; }
      .section-heading { font-size: 1.45rem; }
      .compare-table { font-size: 0.82rem; }
      .subscription-banner { padding: 2rem 1.25rem; }
    }

/* roulang page: category1 */
:root {
      --primary-color: #F26419;
      --primary-hover: #D94E07;
      --primary-subtle: #FFF2EB;
      --accent-yellow: #F6AE2D;
      --accent-navy: #2F4858;
      --accent-green: #38B000;
      --bg-body: #FDFBF7;
      --bg-card: #FFFFFF;
      --bg-dark: #1A1D20;
      --text-main: #1E2124;
      --text-muted: #555B62;
      --text-light: #8C929A;
      --border-color: #EFE9E0;
      --border-focus: #F26419;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-pill: 999px;
      --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 12px 28px rgba(242, 100, 25, 0.12);
      --shadow-dark: 0 10px 30px rgba(0, 0, 0, 0.15);
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      background-color: var(--bg-body);
      color: var(--text-main);
      line-height: 1.65;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease;
    }
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1030;
      transition: all 0.3s ease;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .brand-logo svg {
      width: 34px;
      height: 34px;
      fill: var(--primary-color);
    }
    .nav-link {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-main) !important;
      padding: 0.5rem 1rem !important;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-color) !important;
      background-color: var(--primary-subtle);
    }
    .status-badge-nav {
      background: #EDF9E8;
      border: 1px solid #C8E6C9;
      color: var(--accent-green);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--accent-green);
      display: inline-block;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 176, 0, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(56, 176, 0, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 176, 0, 0); }
    }
    .btn-brand {
      background-color: var(--primary-color);
      color: #FFFFFF !important;
      font-weight: 600;
      border-radius: var(--radius-pill);
      padding: 0.65rem 1.6rem;
      border: none;
      box-shadow: 0 4px 14px rgba(242, 100, 25, 0.25);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-brand:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(242, 100, 25, 0.35);
    }
    .btn-outline-brand {
      background: #FFFFFF;
      color: var(--primary-color) !important;
      border: 1.5px solid var(--primary-color);
      font-weight: 600;
      border-radius: var(--radius-pill);
      padding: 0.6rem 1.4rem;
      transition: all 0.2s ease;
    }
    .btn-outline-brand:hover {
      background-color: var(--primary-subtle);
      color: var(--primary-hover) !important;
    }
    section {
      padding: 3.5rem 0;
      position: relative;
    }
    .section-title-wrap {
      margin-bottom: 2rem;
    }
    .section-tag {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary-color);
      background-color: var(--primary-subtle);
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      display: inline-block;
      margin-bottom: 0.75rem;
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }
    .section-heading {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 0.5rem;
    }
    .section-lead {
      color: var(--text-muted);
      font-size: 0.98rem;
      line-height: 1.65;
    }
    .banner-category {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
      padding: 2.25rem 0 2rem;
    }
    .breadcrumb-nav {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-bottom: 0.85rem;
    }
    .breadcrumb-nav a {
      color: var(--text-muted);
    }
    .breadcrumb-nav a:hover {
      color: var(--primary-color);
    }
    .filter-bar-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.25rem 1.5rem;
      box-shadow: var(--shadow-soft);
      margin-bottom: 2.5rem;
    }
    .filter-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.5rem;
      margin-bottom: 0.75rem;
    }
    .filter-group:last-child {
      margin-bottom: 0;
    }
    .filter-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-muted);
      min-width: 72px;
    }
    .filter-btn {
      font-size: 0.82rem;
      font-weight: 500;
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      background: #F8F9FA;
      color: var(--text-muted);
      border: 1px solid #E9ECEF;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .filter-btn:hover, .filter-btn.active {
      background-color: var(--primary-color);
      color: #FFFFFF;
      border-color: var(--primary-color);
    }
    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: all 0.25s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .media-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(242, 100, 25, 0.3);
    }
    .media-card-poster {
      position: relative;
      height: 190px;
      background: linear-gradient(135deg, #2F4858 0%, #1A1D20 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      overflow: hidden;
    }
    .media-card-poster .poster-pattern {
      position: absolute;
      width: 100%;
      height: 100%;
      opacity: 0.15;
      background-image: radial-gradient(#FFFFFF 1.5px, transparent 1.5px);
      background-size: 14px 14px;
    }
    .poster-play-icon {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: rgba(242, 100, 25, 0.9);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: transform 0.25s ease;
      z-index: 2;
    }
    .poster-play-icon svg {
      width: 22px;
      height: 22px;
      fill: #FFFFFF;
      margin-left: 2px;
    }
    .media-card:hover .poster-play-icon {
      transform: scale(1.15);
      background: var(--primary-color);
    }
    .badge-corner {
      position: absolute;
      top: 10px;
      left: 10px;
      background: rgba(0, 0, 0, 0.75);
      color: #FFFFFF;
      font-size: 0.72rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      backdrop-filter: blur(4px);
      z-index: 2;
    }
    .badge-quality {
      position: absolute;
      top: 10px;
      right: 10px;
      background: var(--primary-color);
      color: #FFFFFF;
      font-size: 0.7rem;
      font-weight: 700;
      padding: 2px 7px;
      border-radius: var(--radius-pill);
      z-index: 2;
    }
    .media-card-body {
      padding: 1.15rem;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .media-sn {
      font-size: 0.78rem;
      font-weight: 700;
      color: var(--primary-color);
      margin-bottom: 0.25rem;
    }
    .media-card-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.5rem;
      line-height: 1.4;
      display: -webkit-box;
      -webkit-line-clamp: 1;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .media-meta-line {
      font-size: 0.8rem;
      color: var(--text-light);
      display: flex;
      justify-content: space-between;
      margin-bottom: 1rem;
    }
    .media-btn-play {
      background: var(--primary-subtle);
      color: var(--primary-color);
      border-radius: var(--radius-pill);
      font-size: 0.85rem;
      font-weight: 600;
      padding: 0.5rem 0.8rem;
      text-align: center;
      transition: all 0.2s ease;
      margin-top: auto;
    }
    .media-card:hover .media-btn-play {
      background: var(--primary-color);
      color: #FFFFFF;
    }
    .radar-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      box-shadow: var(--shadow-soft);
      height: 100%;
    }
    .radar-val {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 0.25rem;
    }
    .troubleshoot-box {
      background: #FFFFFF;
      border-left: 4px solid var(--primary-color);
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      padding: 1.35rem 1.5rem;
      box-shadow: var(--shadow-soft);
      height: 100%;
    }
    .article-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.25rem;
      box-shadow: var(--shadow-soft);
      transition: all 0.2s ease;
    }
    .article-item:hover {
      border-color: var(--primary-color);
      box-shadow: var(--shadow-hover);
    }
    .feedback-panel {
      background: linear-gradient(135deg, #2F4858 0%, #1A1D20 100%);
      border-radius: var(--radius-lg);
      padding: 2.5rem;
      color: #FFFFFF;
    }
    .feedback-input {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #FFFFFF;
      height: 48px;
      border-radius: var(--radius-pill);
      padding: 0 1.25rem;
    }
    .feedback-input:focus {
      background: rgba(255, 255, 255, 0.15);
      border-color: var(--primary-color);
      color: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(242, 100, 25, 0.25);
    }
    .feedback-input::placeholder {
      color: rgba(255, 255, 255, 0.5);
    }
    .footer-site {
      background-color: var(--bg-dark);
      padding: 4.5rem 0 2rem;
      color: #FFFFFF;
    }
    .logo-box {
      background-color: var(--primary-color);
      color: #FFFFFF;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.9rem;
    }
    .footer-heading {
      color: #FFFFFF;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .footer-nav-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-nav-list li {
      margin-bottom: 0.75rem;
    }
    .footer-nav-list a {
      color: #A0AEC0;
      font-size: 0.88rem;
    }
    .footer-nav-list a:hover {
      color: var(--primary-color);
      padding-left: 4px;
    }

/* roulang page: category2 */
:root {
      --primary-color: #F26419;
      --primary-hover: #D94E07;
      --primary-subtle: #FFF2EB;
      --accent-yellow: #F6AE2D;
      --accent-navy: #2F4858;
      --accent-green: #38B000;
      --bg-body: #FDFBF7;
      --bg-card: #FFFFFF;
      --bg-dark: #1A1D20;
      --text-main: #1E2124;
      --text-muted: #555B62;
      --text-light: #8C929A;
      --border-color: #EFE9E0;
      --border-focus: #F26419;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-pill: 999px;
      --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 12px 28px rgba(242, 100, 25, 0.12);
      --shadow-dark: 0 10px 30px rgba(0, 0, 0, 0.15);
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      background-color: var(--bg-body);
      color: var(--text-main);
      line-height: 1.65;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease;
    }
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1030;
      transition: all 0.3s ease;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .brand-logo svg {
      width: 34px;
      height: 34px;
      fill: var(--primary-color);
    }
    .nav-link {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-main) !important;
      padding: 0.5rem 1rem !important;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-color) !important;
      background-color: var(--primary-subtle);
    }
    .status-badge-nav {
      background: #EDF9E8;
      border: 1px solid #C8E6C9;
      color: var(--accent-green);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-green);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 0 2px rgba(56, 176, 0, 0.2);
    }
    .btn-brand {
      background-color: var(--primary-color);
      color: #FFFFFF !important;
      font-weight: 600;
      border-radius: var(--radius-pill);
      padding: 0.65rem 1.6rem;
      border: none;
      box-shadow: 0 4px 14px rgba(242, 100, 25, 0.25);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-brand:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(242, 100, 25, 0.35);
    }
    .btn-outline-brand {
      background: #FFFFFF;
      color: var(--primary-color) !important;
      border: 1.5px solid var(--primary-color);
      font-weight: 600;
      border-radius: var(--radius-pill);
      padding: 0.6rem 1.4rem;
      transition: all 0.2s ease;
    }
    .btn-outline-brand:hover {
      background-color: var(--primary-subtle);
      color: var(--primary-hover) !important;
    }
    section {
      padding: 4rem 0;
      position: relative;
    }
    .section-tag {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary-color);
      background-color: var(--primary-subtle);
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      display: inline-block;
      margin-bottom: 0.75rem;
      letter-spacing: 0.5px;
    }
    .section-heading {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 0.85rem;
    }
    .section-lead {
      color: var(--text-muted);
      font-size: 1rem;
      line-height: 1.65;
    }
    .cat-hero {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
      padding: 2.75rem 0 2.25rem;
    }
    .breadcrumb-custom {
      font-size: 0.88rem;
      color: var(--text-light);
      margin-bottom: 1rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .breadcrumb-custom a {
      color: var(--text-muted);
    }
    .breadcrumb-custom a:hover {
      color: var(--primary-color);
    }
    .load-indicator {
      background: #F8F9FA;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.25rem;
    }
    .progress-compact {
      height: 7px;
      border-radius: var(--radius-pill);
      background: #E9ECEF;
      overflow: hidden;
    }
    .filter-shelf-bar {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.25rem 1.5rem;
      box-shadow: var(--shadow-soft);
    }
    .filter-group-title {
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--text-muted);
      width: 76px;
      flex-shrink: 0;
    }
    .filter-btn {
      font-size: 0.85rem;
      font-weight: 600;
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      border: 1px solid var(--border-color);
      background: #FDFBF7;
      color: var(--text-main);
      cursor: pointer;
      transition: all 0.15s ease;
    }
    .filter-btn:hover, .filter-btn.active {
      background: var(--primary-color);
      color: #FFFFFF;
      border-color: var(--primary-color);
    }
    .video-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: all 0.25s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .video-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(242, 100, 25, 0.35);
    }
    .card-thumb-wrap {
      position: relative;
      background: #25282C;
      aspect-ratio: 16 / 9;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .card-thumb-bg {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, #2F4858 0%, #1A1D20 100%);
      opacity: 0.85;
      transition: transform 0.35s ease;
    }
    .video-card:hover .card-thumb-bg {
      transform: scale(1.04);
    }
    .card-play-icon {
      position: relative;
      z-index: 2;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(242, 100, 25, 0.9);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
      transition: all 0.2s ease;
    }
    .video-card:hover .card-play-icon {
      background: var(--primary-color);
      transform: scale(1.1);
    }
    .card-badge-top {
      position: absolute;
      top: 10px;
      left: 10px;
      z-index: 3;
      font-size: 0.72rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      background: rgba(0, 0, 0, 0.75);
      color: #FFFFFF;
      backdrop-filter: blur(4px);
    }
    .card-badge-res {
      position: absolute;
      bottom: 10px;
      right: 10px;
      z-index: 3;
      font-size: 0.7rem;
      font-weight: 700;
      padding: 2px 6px;
      border-radius: 4px;
      background: var(--accent-yellow);
      color: #1E2124;
    }
    .card-body-box {
      padding: 1.15rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .card-meta-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.78rem;
      color: var(--text-light);
      margin-bottom: 0.5rem;
    }
    .card-title-text {
      font-size: 0.98rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.45;
      margin-bottom: 0.75rem;
    }
    .speed-ping-pill {
      font-size: 0.74rem;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: var(--radius-pill);
      background: #E8F5E9;
      color: #2E7D32;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .node-server-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      box-shadow: var(--shadow-soft);
      height: 100%;
      border-top: 3px solid var(--accent-navy);
      transition: all 0.25s ease;
    }
    .node-server-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-top-color: var(--primary-color);
    }
    .setting-guide-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      box-shadow: var(--shadow-soft);
      height: 100%;
    }
    .setting-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-subtle);
      color: var(--primary-color);
      font-weight: 800;
      font-size: 1.1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1rem;
    }
    .review-deep-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      box-shadow: var(--shadow-soft);
      transition: all 0.25s ease;
      height: 100%;
    }
    .review-deep-card:hover {
      border-color: var(--primary-color);
      box-shadow: var(--shadow-hover);
    }
    .faq-accordion .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md) !important;
      margin-bottom: 0.85rem;
      overflow: hidden;
      box-shadow: var(--shadow-soft);
    }
    .faq-accordion .accordion-button {
      font-weight: 700;
      color: var(--text-main);
      font-size: 1rem;
      padding: 1.2rem 1.4rem;
      background-color: #FFFFFF;
    }
    .faq-accordion .accordion-button:not(.collapsed) {
      color: var(--primary-color);
      background-color: var(--primary-subtle);
      box-shadow: none;
    }
    .faq-accordion .accordion-button:focus {
      box-shadow: none;
      border-color: var(--primary-color);
    }
    .faq-accordion .accordion-body {
      padding: 1.25rem 1.4rem;
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.7;
      background-color: #FFFFFF;
    }
    .footer-site {
      background-color: var(--bg-dark);
      color: #E2E8F0;
      padding: 4.5rem 0 2rem;
    }
    .footer-heading {
      font-size: 0.95rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 1.25rem;
      letter-spacing: 0.5px;
    }
    .footer-nav-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-nav-list li {
      margin-bottom: 0.75rem;
    }
    .footer-nav-list a {
      color: #94A3B8;
      font-size: 0.88rem;
    }
    .footer-nav-list a:hover {
      color: var(--primary-color);
      padding-left: 3px;
    }
    .logo-box {
      display: inline-block;
      background-color: var(--primary-color);
      color: #FFFFFF;
      font-weight: 900;
      font-size: 0.85rem;
      padding: 3px 8px;
      border-radius: 4px;
    }
    @media (max-width: 991px) {
      .section-heading {
        font-size: 1.55rem;
      }
      .cat-hero {
        padding: 2rem 0 1.75rem;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}