/* roulang page: index */
:root {
      --bg-dark: #06110f;
      --bg-surface: #0c1a17;
      --bg-card: #132722;
      --bg-card-hover: #18332c;
      --border-color: #1f3d35;
      --primary: #1ed760;
      --primary-hover: #17b34e;
      --primary-glow: rgba(30, 215, 96, 0.25);
      --text-main: #e6f3ef;
      --text-muted: #8ea9a1;
      --cyan-btn: #00bcd4;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    /* 顶部导航 */
    .site-nav {
      background: rgba(6, 17, 15, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.25rem;
      color: #fff;
    }

    .nav-logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, #1ed760, #00bcd4);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #06110f;
      font-size: 15px;
    }

    .navbar-nav .nav-link {
      color: var(--text-muted);
      font-size: 0.95rem;
      padding: 0.5rem 0.9rem;
      font-weight: 500;
    }

    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: #fff;
    }

    .nav-search {
      position: relative;
      max-width: 200px;
    }

    .nav-search input {
      background: #0d1e1a;
      border: 1px solid var(--border-color);
      border-radius: 20px;
      color: #fff;
      font-size: 0.85rem;
      padding: 6px 14px 6px 32px;
      width: 100%;
    }

    .nav-search input:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 2px var(--primary-glow);
    }

    .nav-search .search-icon {
      position: absolute;
      left: 12px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 0.85rem;
    }

    /* 首屏 Hero */
    .hero-section {
      position: relative;
      padding: 90px 0 70px;
      text-align: center;
      background-image: linear-gradient(180deg, rgba(6, 17, 15, 0.45) 0%, rgba(6, 17, 15, 0.98) 100%), url('/assets/images/b8d12f94708b7632.webp');
      background-size: cover;
      background-position: center top;
      background-repeat: no-repeat;
    }

    .hero-glow-top {
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 600px;
      height: 350px;
      background: radial-gradient(circle, rgba(30, 215, 96, 0.22) 0%, rgba(6, 17, 15, 0) 70%);
      pointer-events: none;
      z-index: 0;
    }

    .hero-container {
      position: relative;
      z-index: 1;
      max-width: 820px;
      margin: 0 auto;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      color: #ffffff;
      letter-spacing: 1px;
      margin-bottom: 18px;
    }

    .hero-sub {
      color: #79e0a8;
      font-size: 1.15rem;
      margin-bottom: 14px;
      font-weight: 500;
    }

    .hero-desc {
      color: var(--text-muted);
      font-size: 0.96rem;
      max-width: 680px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
    }

    .btn-hero-primary {
      background-color: var(--cyan-btn);
      color: #06151a;
      font-weight: 600;
      padding: 10px 28px;
      border-radius: 25px;
      border: none;
      font-size: 0.95rem;
    }

    .btn-hero-primary:hover {
      background-color: #0ed4ed;
      color: #031014;
    }

    .btn-hero-outline {
      background-color: rgba(255, 255, 255, 0.08);
      color: #e6f3ef;
      border: 1px solid var(--border-color);
      font-weight: 600;
      padding: 10px 28px;
      border-radius: 25px;
      font-size: 0.95rem;
    }

    .btn-hero-outline:hover {
      background-color: rgba(255, 255, 255, 0.16);
      color: #fff;
    }

    /* 公共板块标题 */
    .sec-header {
      text-align: center;
      margin-bottom: 45px;
    }

    .sec-title {
      font-size: 1.8rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .sec-sub {
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    /* 核心优势板块 */
    .advantage-section {
      padding: 60px 0 80px;
    }

    .adv-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 28px 20px;
      text-align: center;
      height: 100%;
      transition: transform 0.25s ease, border-color 0.25s ease;
    }

    .adv-card:hover {
      transform: translateY(-4px);
      border-color: rgba(30, 215, 96, 0.5);
    }

    .adv-icon-wrap {
      width: 54px;
      height: 54px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: #17382e;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 22px;
    }

    .adv-title {
      font-size: 1.1rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 10px;
    }

    .adv-desc {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 精选视频板块 */
    .video-section {
      padding: 70px 0 80px;
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .video-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      height: 100%;
      transition: transform 0.25s ease, border-color 0.25s ease;
    }

    .video-card:hover {
      transform: translateY(-5px);
      border-color: var(--primary);
    }

    .video-thumb-box {
      position: relative;
      height: 170px;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #1b362f;
    }

    .video-thumb-img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .video-card:hover .video-thumb-img {
      transform: scale(1.06);
    }

    .video-thumb-overlay {
      position: absolute;
      inset: 0;
      background: rgba(6, 17, 15, 0.35);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .play-btn-circle {
      width: 48px;
      height: 48px;
      background: rgba(255, 255, 255, 0.85);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #06110f;
      font-size: 18px;
      padding-left: 3px;
      box-shadow: 0 4px 14px rgba(0,0,0,0.4);
      transition: background 0.2s ease, transform 0.2s ease;
    }

    .video-card:hover .play-btn-circle {
      background: var(--primary);
      color: #06110f;
      transform: scale(1.1);
    }

    .video-tag-badge {
      position: absolute;
      top: 10px;
      left: 10px;
      background: rgba(0, 0, 0, 0.65);
      color: #fff;
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 6px;
      backdrop-filter: blur(4px);
    }

    .video-duration {
      position: absolute;
      bottom: 8px;
      right: 8px;
      background: rgba(0,0,0,0.7);
      color: #fff;
      font-size: 0.72rem;
      padding: 2px 6px;
      border-radius: 4px;
    }

    .video-info-box {
      padding: 16px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .video-title {
      font-size: 1rem;
      font-weight: 600;
      color: #fff;
      line-height: 1.45;
      margin-bottom: 8px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .video-summary {
      font-size: 0.82rem;
      color: var(--text-muted);
      line-height: 1.5;
      margin-bottom: 14px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .video-meta-bar {
      margin-top: auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.76rem;
      color: var(--text-muted);
      border-top: 1px solid rgba(255,255,255,0.06);
      padding-top: 10px;
    }

    .video-badge {
      background: #17382e;
      color: #79e0a8;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 500;
    }

    /* 平台简介板块 */
    .intro-section {
      padding: 70px 0;
      background: radial-gradient(ellipse at center, #0f241e 0%, var(--bg-dark) 70%);
    }

    .intro-tags {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 25px;
    }

    .intro-tag-item {
      background: #122822;
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      font-size: 0.85rem;
      padding: 6px 16px;
      border-radius: 20px;
    }

    .intro-content-box {
      max-width: 900px;
      margin: 0 auto;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 35px 30px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.8;
      text-align: justify;
    }

    /* 相关资讯板块 */
    .news-section {
      padding: 70px 0 80px;
    }

    .news-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 20px;
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: transform 0.25s ease, border-color 0.25s ease;
    }

    .news-card:hover {
      transform: translateY(-4px);
      border-color: rgba(30, 215, 96, 0.45);
    }

    .news-date {
      font-size: 0.78rem;
      color: #63897f;
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 1.02rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 10px;
      line-height: 1.45;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .news-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
      flex: 1;
    }

    .news-link {
      font-size: 0.82rem;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 5px;
      font-weight: 500;
    }

    /* 常见问题板块 */
    .faq-section {
      padding: 70px 0;
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .faq-wrap {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
    }

    .faq-header {
      padding: 16px 20px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: #fff;
      font-size: 0.96rem;
      font-weight: 500;
    }

    .faq-header-left {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .faq-badge-icon {
      color: var(--primary);
      font-size: 0.95rem;
    }

    .faq-arrow {
      color: var(--text-muted);
      font-size: 0.85rem;
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }

    .faq-body {
      padding: 0 20px 16px 20px;
      color: var(--text-muted);
      font-size: 0.88rem;
      line-height: 1.7;
      display: none;
    }

    .faq-item.active .faq-body {
      display: block;
    }

    /* 使用指南板块 */
    .guide-section {
      padding: 70px 0 80px;
    }

    .guide-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px 16px;
      text-align: center;
      height: 100%;
    }

    .guide-icon-box {
      width: 50px;
      height: 50px;
      margin: 0 auto 16px;
      background: #17382e;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--cyan-btn);
      font-size: 20px;
    }

    .guide-step-tag {
      font-size: 0.74rem;
      color: #63897f;
      text-transform: uppercase;
      font-weight: 600;
      letter-spacing: 0.5px;
      margin-bottom: 6px;
    }

    .guide-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }

    .guide-desc {
      font-size: 0.82rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 用户评价板块 */
    .review-section {
      padding: 70px 0 85px;
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-color);
    }

    .review-wrap {
      max-width: 820px;
      margin: 0 auto;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px;
    }

    .comment-form {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 24px;
    }

    .comment-input, .comment-textarea {
      background: #0d1e1a;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      color: #fff;
      font-size: 0.88rem;
      padding: 10px 14px;
      width: 100%;
    }

    .comment-input:focus, .comment-textarea:focus {
      outline: none;
      border-color: var(--primary);
    }

    .btn-comment {
      background-color: var(--cyan-btn);
      color: #06151a;
      font-weight: 600;
      font-size: 0.88rem;
      border: none;
      padding: 8px 20px;
      border-radius: 6px;
      align-self: flex-start;
      cursor: pointer;
    }

    .review-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .review-item {
      border-bottom: 1px solid rgba(255,255,255,0.05);
      padding-bottom: 14px;
    }

    .review-item:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }

    .review-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 6px;
    }

    .review-author {
      font-size: 0.92rem;
      font-weight: 600;
      color: #fff;
    }

    .review-time {
      font-size: 0.75rem;
      color: #63897f;
    }

    .review-text {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 8px;
    }

    .review-meta {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 0.76rem;
      color: #63897f;
    }

    /* 页脚 */
    .site-footer {
      background-color: var(--bg-dark);
      border-top: 1px solid var(--border-color);
      padding: 40px 0 35px;
      text-align: center;
      font-size: 0.82rem;
      color: #55726a;
    }

    .site-footer a {
      color: var(--text-muted);
      margin: 0 8px;
    }

    .site-footer a:hover {
      color: #fff;
    }

    .footer-copy {
      margin-top: 12px;
      line-height: 1.6;
    }

    /* 移动端响应式覆盖 */
    @media (max-width: 1024px) {
      .hero-title {
        font-size: 2.3rem;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-sub {
        font-size: 1rem;
      }
      .sec-title {
        font-size: 1.5rem;
      }
      .intro-content-box {
        padding: 20px 16px;
      }
      .nav-search {
        max-width: 100%;
        margin-top: 10px;
      }
    }

    @media (max-width: 520px) {
      .hero-section {
        padding: 60px 0 45px;
      }
      .hero-title {
        font-size: 1.6rem;
      }
      .hero-actions {
        flex-direction: column;
        gap: 12px;
      }
      .btn-hero-primary, .btn-hero-outline {
        width: 100%;
      }
      .adv-card {
        padding: 20px 14px;
      }
    }

/* roulang page: article */
:root {
      --bg-dark: #06110f;
      --bg-surface: #0c1a17;
      --bg-card: #132722;
      --bg-card-hover: #18332c;
      --border-color: #1f3d35;
      --primary: #1ed760;
      --primary-hover: #17b34e;
      --primary-glow: rgba(30, 215, 96, 0.25);
      --text-main: #e6f3ef;
      --text-muted: #8ea9a1;
      --cyan-btn: #00bcd4;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    .site-nav {
      background: rgba(6, 17, 15, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.25rem;
      color: #fff;
    }
    .nav-logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, #1ed760, #00bcd4);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #06110f;
      font-size: 15px;
    }
    .navbar-nav .nav-link {
      color: var(--text-muted);
      font-size: 0.95rem;
      padding: 0.5rem 0.9rem;
      font-weight: 500;
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: #fff;
    }
    .nav-search {
      position: relative;
      max-width: 200px;
    }
    .nav-search input {
      background: #0d1e1a;
      border: 1px solid var(--border-color);
      border-radius: 20px;
      color: #fff;
      font-size: 0.85rem;
      padding: 6px 14px 6px 32px;
      width: 100%;
    }
    .nav-search input:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 2px var(--primary-glow);
    }
    .nav-search .search-icon {
      position: absolute;
      left: 12px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 0.85rem;
    }
    .article-header-bg {
      padding: 50px 0 35px;
      background-image: linear-gradient(180deg, rgba(6, 17, 15, 0.7) 0%, var(--bg-dark) 100%), url('/assets/images/2f220d11abfcb7dc.jpg');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--border-color);
    }
    .breadcrumb-nav {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .breadcrumb-nav a {
      color: var(--text-muted);
    }
    .breadcrumb-nav a:hover {
      color: var(--primary);
    }
    .article-main-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: #ffffff;
      line-height: 1.35;
      margin-bottom: 20px;
    }
    .article-meta-bar {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .article-meta-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .article-meta-item i {
      color: var(--primary);
    }
    .badge-category {
      background: rgba(30, 215, 96, 0.15);
      color: var(--primary);
      border: 1px solid rgba(30, 215, 96, 0.3);
      padding: 4px 10px;
      border-radius: 6px;
      font-weight: 500;
    }
    .article-body-area {
      padding: 45px 0 60px;
    }
    .article-paper {
      background-color: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 18px;
      padding: 40px;
      margin-bottom: 40px;
    }
    .article-content {
      font-size: 1.05rem;
      line-height: 1.85;
      color: #d7e7e2;
    }
    .article-content p {
      margin-bottom: 1.5rem;
    }
    .article-content h2, .article-content h3 {
      color: #ffffff;
      font-weight: 700;
      margin-top: 2rem;
      margin-bottom: 1rem;
      border-left: 4px solid var(--primary);
      padding-left: 12px;
    }
    .article-content img {
      max-width: 100%;
      height: auto;
      border-radius: 12px;
      margin: 20px 0;
      border: 1px solid var(--border-color);
    }
    .article-lead-banner {
      border-radius: 14px;
      overflow: hidden;
      margin-bottom: 30px;
      border: 1px solid var(--border-color);
    }
    .article-lead-banner img {
      width: 100%;
      max-height: 380px;
      object-fit: cover;
      display: block;
    }
    .article-tip-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 20px;
      margin-top: 35px;
      display: flex;
      align-items: flex-start;
      gap: 15px;
    }
    .article-tip-icon {
      color: var(--cyan-btn);
      font-size: 1.4rem;
      margin-top: 2px;
    }
    .article-tip-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      margin: 0;
    }
    .sidebar-block {
      background-color: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px;
      margin-bottom: 30px;
    }
    .sidebar-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 8px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 12px;
    }
    .sidebar-title i {
      color: var(--primary);
    }
    .related-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .related-item {
      padding: 12px 0;
      border-bottom: 1px dashed rgba(31, 61, 53, 0.6);
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .related-item:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .related-link {
      color: var(--text-main);
      font-size: 0.92rem;
      line-height: 1.45;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .related-link:hover {
      color: var(--primary);
    }
    .related-date {
      font-size: 0.78rem;
      color: var(--text-muted);
    }
    .sidebar-banner {
      border-radius: 12px;
      overflow: hidden;
      position: relative;
      border: 1px solid var(--border-color);
    }
    .sidebar-banner img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
    }
    .sidebar-banner-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(6, 17, 15, 0.2) 0%, rgba(6, 17, 15, 0.9) 100%);
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 16px;
    }
    .sidebar-banner-overlay h5 {
      color: #fff;
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .sidebar-banner-overlay p {
      color: var(--text-muted);
      font-size: 0.8rem;
      margin-bottom: 0;
    }
    .site-footer {
      background-color: #040b0a;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 30px;
      text-align: center;
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    .site-footer a {
      color: var(--text-muted);
      margin: 0 8px;
    }
    .site-footer a:hover {
      color: var(--primary);
    }
    .footer-copy {
      margin-top: 20px;
      font-size: 0.82rem;
      color: #5d756e;
    }
    .empty-card {
      text-align: center;
      padding: 60px 20px;
    }
    .empty-icon {
      font-size: 3rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }
    .btn-back-home {
      display: inline-block;
      margin-top: 15px;
      background-color: var(--primary);
      color: #06110f;
      padding: 8px 24px;
      border-radius: 20px;
      font-weight: 600;
    }
    .btn-back-home:hover {
      background-color: var(--primary-hover);
      color: #06110f;
    }
    @media (max-width: 991px) {
      .article-main-title {
        font-size: 1.7rem;
      }
      .article-paper {
        padding: 24px 18px;
      }
      .nav-search {
        max-width: 100%;
        margin-top: 12px;
      }
    }
    @media (max-width: 576px) {
      .article-main-title {
        font-size: 1.45rem;
      }
      .article-meta-bar {
        font-size: 0.8rem;
        gap: 10px;
      }
      .article-paper {
        padding: 18px 14px;
      }
    }

/* roulang page: category1 */
:root {
      --bg-dark: #06110f;
      --bg-surface: #0c1a17;
      --bg-card: #132722;
      --bg-card-hover: #18332c;
      --border-color: #1f3d35;
      --primary: #1ed760;
      --primary-hover: #17b34e;
      --primary-glow: rgba(30, 215, 96, 0.25);
      --text-main: #e6f3ef;
      --text-muted: #8ea9a1;
      --cyan-btn: #00bcd4;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    /* 顶部导航 */
    .site-nav {
      background: rgba(6, 17, 15, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.25rem;
      color: #fff;
    }

    .nav-logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, #1ed760, #00bcd4);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #06110f;
      font-size: 15px;
    }

    .navbar-nav .nav-link {
      color: var(--text-muted);
      font-size: 0.95rem;
      padding: 0.5rem 0.9rem;
      font-weight: 500;
    }

    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: #fff;
    }

    .nav-search {
      position: relative;
      max-width: 200px;
    }

    .nav-search input {
      background: #0d1e1a;
      border: 1px solid var(--border-color);
      border-radius: 20px;
      color: #fff;
      font-size: 0.85rem;
      padding: 6px 14px 6px 32px;
      width: 100%;
    }

    .nav-search input:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 2px var(--primary-glow);
    }

    .nav-search .search-icon {
      position: absolute;
      left: 12px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 0.85rem;
    }

    /* 分类落地 Hero */
    .hero-section {
      position: relative;
      padding: 85px 0 65px;
      text-align: center;
      background-image: linear-gradient(180deg, rgba(6, 17, 15, 0.6) 0%, rgba(6, 17, 15, 0.98) 100%), url('/assets/images/ff1452a171f4a208.webp');
      background-size: cover;
      background-position: center top;
      background-repeat: no-repeat;
    }

    .hero-glow-top {
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 620px;
      height: 340px;
      background: radial-gradient(circle, rgba(30, 215, 96, 0.22) 0%, rgba(6, 17, 15, 0) 70%);
      pointer-events: none;
      z-index: 0;
    }

    .hero-container {
      position: relative;
      z-index: 1;
      max-width: 820px;
      margin: 0 auto;
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 800;
      color: #ffffff;
      letter-spacing: 1px;
      margin-bottom: 16px;
    }

    .hero-sub {
      color: #79e0a8;
      font-size: 1.15rem;
      margin-bottom: 12px;
      font-weight: 500;
    }

    .hero-desc {
      color: var(--text-muted);
      font-size: 0.96rem;
      max-width: 680px;
      margin: 0 auto 30px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-hero-primary {
      background-color: var(--cyan-btn);
      color: #06151a;
      font-weight: 600;
      padding: 10px 28px;
      border-radius: 25px;
      border: none;
      font-size: 0.95rem;
      display: inline-block;
    }

    .btn-hero-primary:hover {
      background-color: #0ed4ed;
      color: #031014;
    }

    .btn-hero-outline {
      background-color: rgba(255, 255, 255, 0.08);
      color: #e6f3ef;
      border: 1px solid var(--border-color);
      font-weight: 600;
      padding: 10px 28px;
      border-radius: 25px;
      font-size: 0.95rem;
      display: inline-block;
    }

    .btn-hero-outline:hover {
      background-color: rgba(255, 255, 255, 0.16);
      color: #fff;
    }

    /* 公共板块标题 */
    .sec-header {
      text-align: center;
      margin-bottom: 45px;
    }

    .sec-title {
      font-size: 1.8rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .sec-subtitle {
      font-size: 0.9rem;
      color: var(--text-muted);
      letter-spacing: 0.5px;
    }

    /* 教学体系卖点 */
    .feature-section {
      padding: 70px 0;
    }

    .feat-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 30px 22px;
      text-align: center;
      height: 100%;
      transition: transform 0.25s ease, border-color 0.25s ease;
    }

    .feat-card:hover {
      transform: translateY(-4px);
      border-color: rgba(30, 215, 96, 0.5);
    }

    .feat-icon-box {
      width: 54px;
      height: 54px;
      border-radius: 16px;
      background: rgba(30, 215, 96, 0.12);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin: 0 auto 18px;
    }

    .feat-title {
      font-size: 1.15rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 10px;
    }

    .feat-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 分解系列视窗 */
    .video-showcase-section {
      padding: 70px 0 80px;
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .dance-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      height: 100%;
      transition: transform 0.25s ease, border-color 0.25s ease;
    }

    .dance-card:hover {
      transform: translateY(-5px);
      border-color: var(--primary);
    }

    .dance-thumb {
      position: relative;
      width: 100%;
      height: 175px;
      background-color: #0b1c18;
      overflow: hidden;
    }

    .dance-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .dance-card:hover .dance-thumb img {
      transform: scale(1.06);
    }

    .play-overlay-btn {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 46px;
      height: 46px;
      background: rgba(255, 255, 255, 0.88);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #06110f;
      font-size: 16px;
      padding-left: 3px;
      box-shadow: 0 4px 14px rgba(0,0,0,0.4);
      transition: background 0.2s ease, transform 0.2s ease;
    }

    .dance-card:hover .play-overlay-btn {
      background: var(--primary);
      transform: translate(-50%, -50%) scale(1.1);
    }

    .dance-tag {
      position: absolute;
      top: 10px;
      left: 10px;
      background: rgba(0, 0, 0, 0.65);
      color: #fff;
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 6px;
      backdrop-filter: blur(4px);
    }

    .dance-body {
      padding: 16px 16px 18px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .dance-name {
      font-size: 1rem;
      font-weight: 600;
      color: #fff;
      line-height: 1.45;
      margin-bottom: 8px;
    }

    .dance-info {
      font-size: 0.84rem;
      color: var(--text-muted);
      line-height: 1.5;
      margin-bottom: 12px;
      flex-grow: 1;
    }

    .dance-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.78rem;
      color: #7aa196;
      border-top: 1px solid rgba(255,255,255,0.06);
      padding-top: 10px;
    }

    /* 学习步骤板块 */
    .steps-section {
      padding: 70px 0;
    }

    .step-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px 20px;
      text-align: center;
      position: relative;
      height: 100%;
    }

    .step-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary);
      border: 1px solid var(--primary);
      border-radius: 20px;
      padding: 2px 12px;
      margin-bottom: 14px;
      text-transform: uppercase;
    }

    .step-name {
      font-size: 1.1rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }

    .step-detail {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 常见答疑 */
    .faq-section {
      padding: 70px 0;
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .faq-box {
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      margin-bottom: 14px;
      padding: 18px 22px;
      transition: border-color 0.2s ease;
    }

    .faq-item:hover {
      border-color: rgba(30, 215, 96, 0.4);
    }

    .faq-question {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 600;
      font-size: 1rem;
      color: #fff;
      margin-bottom: 8px;
    }

    .faq-question i {
      color: var(--primary);
      font-size: 1.1rem;
    }

    .faq-answer {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      padding-left: 28px;
    }

    /* CMS 资讯/教研列表 */
    .news-section {
      padding: 70px 0 80px;
    }

    .article-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 22px;
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: transform 0.2s ease, border-color 0.2s ease;
    }

    .article-card:hover {
      transform: translateY(-4px);
      border-color: var(--primary);
    }

    .article-date {
      font-size: 0.8rem;
      color: #6d8e85;
      margin-bottom: 8px;
    }

    .article-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      line-height: 1.45;
      margin-bottom: 10px;
    }

    .article-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .article-more {
      font-size: 0.84rem;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 5px;
      font-weight: 500;
    }

    .empty-state {
      text-align: center;
      padding: 40px;
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* 底部专属 CTA */
    .cta-banner {
      background: linear-gradient(135deg, #102d25 0%, #0c201b 100%);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 45px 30px;
      text-align: center;
      margin: 20px 0 70px;
    }

    .cta-title {
      font-size: 1.6rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }

    .cta-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      max-width: 620px;
      margin: 0 auto 24px;
    }

    /* 统一页脚 */
    .site-footer {
      background-color: #040c0b;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 30px;
      text-align: center;
      font-size: 0.86rem;
      color: var(--text-muted);
    }

    .site-footer a {
      color: var(--text-muted);
      margin: 0 8px;
    }

    .site-footer a:hover {
      color: #fff;
    }

    .footer-copy {
      margin-top: 20px;
      font-size: 0.8rem;
      color: #55756c;
      line-height: 1.8;
    }

    /* 响应式样式适配 */
    @media (max-width: 991px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .nav-search {
        margin-top: 15px;
        max-width: 100%;
      }
    }

    @media (max-width: 767px) {
      .hero-section {
        padding: 55px 0 45px;
      }
      .hero-title {
        font-size: 1.75rem;
      }
      .hero-sub {
        font-size: 1rem;
      }
      .sec-title {
        font-size: 1.45rem;
      }
      .faq-answer {
        padding-left: 0;
      }
    }

/* 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}