/* roulang page: index */
:root {
      --bg-base: #0B0D11;
      --bg-surface: #141820;
      --bg-surface-elevated: #1B212D;
      --primary: #00FFB2;
      --primary-hover: #00cc8e;
      --accent: #FF8A00;
      --text-main: #FFFFFF;
      --text-muted: #8F9CAE;
      --border-line: #1F2633;
      --border-focus: #2D3748;
      --radius-sm: 4px;
      --radius-md: 6px;
      --font-mono: "DIN Alternate", "Roboto Mono", "Courier New", monospace;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-base);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, opacity 0.2s ease;
    }
    a:hover {
      color: var(--primary);
    }

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

    .container-custom {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 13, 17, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-line);
    }

    .nav-topbar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.75rem;
      color: var(--text-muted);
      padding: 6px 0;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 2px 8px;
      background: rgba(0, 255, 178, 0.1);
      color: var(--primary);
      border-radius: var(--radius-sm);
      font-family: var(--font-mono);
      font-weight: 700;
    }
    .status-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 8px var(--primary);
    }

    .nav-main {
      padding: 12px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #fff;
    }
    .brand-logo i {
      color: var(--primary);
      font-size: 1.4rem;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 24px;
      margin: 0;
      align-items: center;
    }
    .nav-link {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: #fff;
    }
    .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
    }

    .btn-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background-color: var(--primary);
      color: #050608;
      font-weight: 700;
      font-size: 0.9rem;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      box-shadow: 0 2px 14px rgba(0, 255, 178, 0.25);
      transition: all 0.2s ease;
      cursor: pointer;
      border: 1px solid var(--primary);
    }
    .btn-cta:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 20px rgba(0, 255, 178, 0.45);
      color: #000;
      transform: translateY(-1px);
    }
    .btn-secondary {
      background-color: var(--bg-surface-elevated);
      color: #fff;
      border: 1px solid var(--border-line);
      box-shadow: none;
    }
    .btn-secondary:hover {
      background-color: var(--border-focus);
      color: var(--primary);
      border-color: var(--primary);
    }

    /* 通用板块外框与标题 */
    section {
      padding: 85px 0;
      border-bottom: 1px solid var(--border-line);
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-surface);
    }
    .section-header {
      margin-bottom: 45px;
    }
    .section-kicker {
      font-size: 0.8rem;
      font-family: var(--font-mono);
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1rem;
      max-width: 780px;
      line-height: 1.7;
    }

    /* 板块 1: Hero Banner */
    .hero-section {
      padding: 70px 0 90px;
      background: radial-gradient(circle at 80% 20%, rgba(0, 255, 178, 0.08) 0%, transparent 60%),
                  radial-gradient(circle at 20% 80%, rgba(255, 138, 0, 0.05) 0%, transparent 50%),
                  url('/assets/images/b124c1492da67a52.png') center/cover no-repeat;
      position: relative;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: rgba(11, 13, 17, 0.88);
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-title {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      color: var(--primary);
    }
    .hero-p {
      color: var(--text-muted);
      font-size: 1.1rem;
      line-height: 1.8;
      margin-bottom: 35px;
      max-width: 700px;
    }
    .hero-metrics-bar {
      margin-top: 45px;
      padding: 24px;
      background: rgba(20, 24, 32, 0.85);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
    }
    .metric-cell {
      padding: 10px 15px;
      border-right: 1px solid var(--border-line);
    }
    .metric-cell:last-child {
      border-right: none;
    }
    .metric-val {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 800;
      color: #fff;
      line-height: 1;
      margin-bottom: 6px;
    }
    .metric-val span {
      color: var(--primary);
      font-size: 1.2rem;
    }
    .metric-label {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 板块 2: 多维推荐服务矩阵 */
    .card-matrix {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: all 0.25s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .card-matrix:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0, 255, 178, 0.1);
    }
    .matrix-icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: rgba(0, 255, 178, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      margin-bottom: 20px;
    }
    .matrix-card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .matrix-card-p {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 20px;
    }
    .matrix-tag-group {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .spec-tag {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      padding: 3px 8px;
      background: rgba(255, 255, 255, 0.04);
      color: var(--text-muted);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-sm);
    }

    /* 板块 3: 热门推荐结果展示 */
    .recom-card {
      background: var(--bg-surface-elevated);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      overflow: hidden;
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: border-color 0.2s ease;
    }
    .recom-card:hover {
      border-color: var(--border-focus);
    }
    .recom-thumb-box {
      position: relative;
      height: 190px;
      overflow: hidden;
      background: #000;
    }
    .recom-thumb-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.85;
      transition: transform 0.4s ease;
    }
    .recom-card:hover .recom-thumb-box img {
      transform: scale(1.05);
      opacity: 1;
    }
    .match-pill {
      position: absolute;
      top: 14px;
      right: 14px;
      background: rgba(11, 13, 17, 0.9);
      border: 1px solid var(--primary);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      font-family: var(--font-mono);
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary);
    }
    .recom-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .recom-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .recom-summary {
      color: var(--text-muted);
      font-size: 0.9rem;
      line-height: 1.65;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .recom-attr-row {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 14px;
      margin-top: 10px;
      font-size: 0.82rem;
    }
    .attr-lbl { color: var(--text-muted); }
    .attr-val { font-family: var(--font-mono); color: #fff; font-weight: 700; }

    /* 板块 4: 算法实测基准对照区 */
    .benchmark-table-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      overflow-x: auto;
    }
    .benchmark-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }
    .benchmark-table th {
      padding: 16px 20px;
      background: rgba(255, 255, 255, 0.02);
      border-bottom: 1px solid var(--border-line);
      color: #fff;
      font-weight: 700;
    }
    .benchmark-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-line);
      color: var(--text-muted);
    }
    .benchmark-table tr:last-child td {
      border-bottom: none;
    }
    .highlight-platform {
      color: var(--primary);
      font-family: var(--font-mono);
      font-weight: 700;
    }

    /* 板块 5: 技术演进里程碑 */
    .milestone-track {
      position: relative;
      padding-left: 30px;
      border-left: 2px solid var(--border-line);
      margin-left: 15px;
    }
    .milestone-item {
      position: relative;
      margin-bottom: 40px;
    }
    .milestone-item:last-child {
      margin-bottom: 0;
    }
    .milestone-dot {
      position: absolute;
      left: -37px;
      top: 4px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--bg-base);
      border: 2px solid var(--primary);
    }
    .milestone-ver {
      font-family: var(--font-mono);
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 4px;
    }
    .milestone-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }
    .milestone-desc {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
    }

    /* 板块 6: 核心技术认证与安全保障 */
    .cert-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
    }
    .cert-icon {
      font-size: 1.5rem;
      color: var(--accent);
      margin-bottom: 14px;
    }
    .cert-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }
    .cert-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 7: 典型玩家场景 */
    .scenario-box {
      background: #080A0D;
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 35px;
      margin-bottom: 24px;
    }
    .scenario-title {
      font-size: 1.3rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .scenario-title i {
      color: var(--primary);
    }
    .scenario-p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
      margin-bottom: 18px;
    }

    /* 板块 8: 关键生态数据看板 */
    .stat-strip {
      background: var(--bg-surface-elevated);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 35px 20px;
      text-align: center;
    }
    .stat-strip .stat-num {
      font-family: var(--font-mono);
      font-size: 2.6rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 8px;
    }
    .stat-strip .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 板块 9: 行业内测与评价 */
    .review-bubble {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 0.92rem;
      color: #D1D8E0;
      line-height: 1.65;
      margin-bottom: 18px;
    }
    .review-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 14px;
    }
    .review-user-name {
      font-weight: 700;
      color: #fff;
      font-size: 0.88rem;
    }
    .review-user-tag {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 板块 10: 资讯与动态 */
    .news-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 20px;
      transition: border-color 0.2s ease;
    }
    .news-card:hover {
      border-color: var(--primary);
    }
    .news-time {
      font-family: var(--font-mono);
      font-size: 0.78rem;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }
    .news-desc {
      color: var(--text-muted);
      font-size: 0.9rem;
      line-height: 1.6;
    }

    /* 板块 11: FAQ 折叠 */
    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 22px;
      font-weight: 700;
      font-size: 1.05rem;
      color: #fff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question:hover {
      color: var(--primary);
    }
    .faq-answer {
      padding: 0 22px 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
      color: var(--primary);
    }
    .faq-icon {
      transition: transform 0.2s ease;
      font-size: 0.85rem;
    }

    /* 板块 12: 转化表单与下载 */
    .cta-hub-wrap {
      background: linear-gradient(145deg, #141820 0%, #0D1016 100%);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 45px 35px;
    }
    .platform-btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 25px;
    }
    .custom-form-panel {
      background: var(--bg-base);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: block;
    }
    .form-select, .form-input {
      width: 100%;
      background: var(--bg-surface-elevated);
      border: 1px solid var(--border-line);
      color: #fff;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
    }
    .form-select:focus, .form-input:focus {
      outline: none;
      border-color: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background: #080A0D;
      border-top: 1px solid var(--border-line);
      padding: 60px 0 30px;
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .footer-col-title {
      font-size: 1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      margin-top: 40px;
      padding-top: 25px;
      text-align: center;
      font-size: 0.8rem;
    }

    /* 移动端断点适配 */
    @media (max-width: 768px) {
      .hero-title { font-size: 2rem; }
      .nav-menu { display: none; }
      .metric-cell { border-right: none; border-bottom: 1px solid var(--border-line); margin-bottom: 10px; }
      section { padding: 50px 0; }
      .cta-hub-wrap { padding: 25px 18px; }
    }