/* roulang page: index */
:root {
      --bg-primary: #0a0c10;
      --bg-secondary: #12161f;
      --bg-tertiary: #1a202c;
      --bg-card: #151b26;
      --text-main: #f0f4f8;
      --text-muted: #94a3b8;
      --text-subtle: #64748b;
      --accent: #2563eb;
      --accent-hover: #1d4ed8;
      --accent-glow: rgba(37, 99, 235, 0.25);
      --highlight: #00d26a;
      --border-subtle: #232d3d;
      --border-bright: #334155;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    }

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

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-primary);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(10, 12, 16, 0.85);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-subtle);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: #fff;
    }

    .brand-badge {
      font-size: 0.68rem;
      background: var(--accent);
      color: #fff;
      padding: 2px 7px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      text-transform: uppercase;
    }

    .nav-menu {
      display: flex;
      list-style: none;
      gap: 32px;
    }

    .nav-menu a {
      font-size: 0.93rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .nav-menu a:hover, .nav-menu a.active {
      color: #fff;
    }

    .nav-cta-btn {
      background: var(--accent);
      color: #fff;
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      font-weight: 600;
      transition: all 0.2s ease;
    }

    .nav-cta-btn:hover {
      background: var(--accent-hover);
      box-shadow: 0 0 16px var(--accent-glow);
    }

    /* 通用板块样式 */
    section {
      padding: 88px 0;
      position: relative;
    }

    .section-border {
      border-top: 1px solid var(--border-subtle);
    }

    .sec-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--highlight);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 10px;
    }

    .sec-title {
      font-size: 2.1rem;
      line-height: 1.25;
      font-weight: 700;
      margin-bottom: 14px;
      letter-spacing: -0.02em;
    }

    .sec-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      line-height: 1.7;
      margin-bottom: 40px;
    }

    /* 板块 1: 杂志分栏 Hero 首屏 */
    .hero-section {
      padding: 80px 0 100px;
      background: radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.12) 0%, transparent 60%);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 56px;
      align-items: center;
    }

    .hero-lead-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: rgba(37, 99, 235, 0.12);
      border: 1px solid rgba(37, 99, 235, 0.3);
      border-radius: 99px;
      color: #93c5fd;
      font-size: 0.82rem;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 3.2rem;
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.03em;
      margin-bottom: 24px;
      color: #ffffff;
    }

    .hero-title span {
      background: linear-gradient(135deg, #60a5fa, #38bdf8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-intro {
      font-size: 1.05rem;
      line-height: 1.75;
      color: var(--text-muted);
      margin-bottom: 36px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      align-items: center;
    }

    .btn-main {
      padding: 13px 30px;
      background: var(--accent);
      color: #ffffff;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-weight: 600;
      box-shadow: 0 4px 20px var(--accent-glow);
    }

    .btn-main:hover {
      background: var(--accent-hover);
    }

    .btn-outline {
      padding: 12px 26px;
      border: 1px solid var(--border-bright);
      color: var(--text-main);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-weight: 500;
      background: rgba(255, 255, 255, 0.02);
    }

    .btn-outline:hover {
      border-color: #94a3b8;
      background: rgba(255, 255, 255, 0.05);
    }

    .hero-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 24px;
      position: relative;
      box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
    }

    .hero-card-img {
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-bottom: 20px;
      position: relative;
      aspect-ratio: 16/10;
    }

    .hero-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .hero-card-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      padding-top: 14px;
      border-top: 1px solid var(--border-subtle);
      text-align: center;
    }

    .hero-stat-val {
      font-size: 1.25rem;
      font-weight: 700;
      color: #38bdf8;
    }

    .hero-stat-lbl {
      font-size: 0.72rem;
      color: var(--text-subtle);
    }

    /* 板块 2: 问题陈述 */
    .sec-pain {
      background: var(--bg-secondary);
    }

    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pain-card {
      background: var(--bg-primary);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      position: relative;
    }

    .pain-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-subtle);
      opacity: 0.3;
      margin-bottom: 12px;
    }

    .pain-card h3 {
      font-size: 1.15rem;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .pain-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 3: 操作演示 */
    .sec-demo {
      background: var(--bg-primary);
    }

    .demo-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
      background: var(--bg-secondary);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 40px;
    }

    .demo-preview {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-bright);
    }

    .demo-steps {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .step-item {
      display: flex;
      gap: 16px;
    }

    .step-idx {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--accent);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.85rem;
      flex-shrink: 0;
    }

    .step-content h4 {
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .step-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 板块 4: 结果预览 */
    .sec-results {
      background: var(--bg-secondary);
    }

    .result-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .result-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: transform 0.2s ease, border-color 0.2s ease;
    }

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

    .result-card-media {
      aspect-ratio: 16/9;
      background: #000;
      overflow: hidden;
    }

    .result-card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .result-card-body {
      padding: 18px;
    }

    .result-card-title {
      font-size: 0.98rem;
      font-weight: 600;
      margin-bottom: 8px;
    }

    .result-card-metric {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.78rem;
      color: var(--highlight);
      font-weight: 600;
    }

    /* 板块 5: 常见卡住点 (痛点解惑) */
    .sec-stuck {
      background: var(--bg-primary);
    }

    .stuck-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .stuck-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .stuck-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .stuck-badge {
      background: rgba(239, 68, 68, 0.15);
      color: #f87171;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: var(--radius-sm);
    }

    .stuck-header h4 {
      font-size: 1rem;
      font-weight: 600;
    }

    .stuck-ans {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 6: 成功路径 */
    .sec-pathway {
      background: var(--bg-secondary);
    }

    .path-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .path-card {
      background: var(--bg-primary);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      border-top: 3px solid var(--accent);
    }

    .path-phase {
      font-size: 0.75rem;
      color: var(--accent);
      font-weight: 700;
      margin-bottom: 6px;
      letter-spacing: 0.05em;
    }

    .path-card h4 {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .path-card p {
      font-size: 0.84rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 板块 7: 深度行业资讯 */
    .sec-news {
      background: var(--bg-primary);
    }

    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .news-thumb {
      aspect-ratio: 16/9;
      overflow: hidden;
    }

    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .news-info {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .news-date {
      font-size: 0.75rem;
      color: var(--text-subtle);
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .news-excerpt {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 板块 8: 规格与参数速览 */
    .sec-specs {
      background: var(--bg-secondary);
    }

    .specs-table {
      width: 100%;
      background: var(--bg-primary);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      border-collapse: collapse;
    }

    .specs-table th, .specs-table td {
      padding: 16px 24px;
      text-align: left;
      font-size: 0.9rem;
      border-bottom: 1px solid var(--border-subtle);
    }

    .specs-table th {
      background: rgba(255, 255, 255, 0.02);
      color: var(--text-subtle);
      font-weight: 600;
      width: 25%;
    }

    .specs-table td {
      color: var(--text-main);
    }

    /* 板块 9: 实际前后对比 (Before / After) */
    .sec-compare {
      background: var(--bg-primary);
    }

    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .compare-col {
      padding: 32px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-subtle);
    }

    .col-before {
      background: rgba(239, 68, 68, 0.03);
      border-color: rgba(239, 68, 68, 0.2);
    }

    .col-after {
      background: rgba(0, 210, 106, 0.03);
      border-color: rgba(0, 210, 106, 0.25);
    }

    .compare-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .col-before .compare-title {
      color: #f87171;
    }

    .col-after .compare-title {
      color: var(--highlight);
    }

    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .compare-list li {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 板块 10: 性能指标数据 */
    .sec-metrics {
      background: var(--bg-secondary);
    }

    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .metric-box {
      background: var(--bg-primary);
      padding: 32px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-subtle);
    }

    .metric-big {
      font-size: 2.5rem;
      font-weight: 800;
      color: #38bdf8;
      margin-bottom: 6px;
    }

    .metric-name {
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 4px;
    }

    .metric-sub {
      font-size: 0.8rem;
      color: var(--text-subtle);
    }

    /* 板块 11: 真实案例故事 */
    .sec-case {
      background: var(--bg-primary);
    }

    .case-card {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 36px;
      align-items: center;
    }

    .case-media {
      border-radius: var(--radius-md);
      overflow: hidden;
      aspect-ratio: 16/10;
    }

    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-body h4 {
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .case-item {
      margin-bottom: 12px;
    }

    .case-item-title {
      font-size: 0.82rem;
      color: var(--text-subtle);
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .case-item-content {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 12: 用户评测墙 */
    .sec-reviews {
      background: var(--bg-secondary);
    }

    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .review-stars {
      color: #eab308;
      font-size: 0.85rem;
      margin-bottom: 12px;
    }

    .review-txt {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .author-avatar {
      width: 36px;
      height: 36px;
      background: #334155;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: 700;
      color: #94a3b8;
    }

    .author-meta h5 {
      font-size: 0.85rem;
      font-weight: 600;
    }

    .author-meta span {
      font-size: 0.75rem;
      color: var(--text-subtle);
    }

    /* 板块 13: 适用人群与场景矩阵 */
    .sec-crowd {
      background: var(--bg-primary);
    }

    .crowd-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .crowd-box {
      background: var(--bg-secondary);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px 20px;
    }

    .crowd-box h4 {
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 10px;
      color: #38bdf8;
    }

    .crowd-box p {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 板块 14: 平台安全与服务保障 */
    .sec-security {
      background: var(--bg-secondary);
    }

    .sec-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .sec-box {
      background: var(--bg-primary);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 28px 24px;
    }

    .sec-box h4 {
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .sec-box p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 15: 统一全端入口矩阵 */
    .sec-entries {
      background: var(--bg-primary);
    }

    .entry-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
    }

    .entry-card {
      background: var(--bg-secondary);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      text-align: center;
      transition: all 0.2s ease;
    }

    .entry-card:hover {
      border-color: var(--accent);
      background: var(--bg-card);
    }

    .entry-name {
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .entry-ver {
      font-size: 0.75rem;
      color: var(--text-subtle);
    }

    /* 板块 16: 使用规范与合规提示条 */
    .sec-notice {
      background: var(--bg-secondary);
      padding: 40px 0;
    }

    .notice-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: rgba(37, 99, 235, 0.08);
      border: 1px solid rgba(37, 99, 235, 0.2);
      border-radius: var(--radius-md);
      padding: 20px 32px;
      gap: 24px;
    }

    .notice-text {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .notice-tag {
      background: var(--accent);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      white-space: nowrap;
    }

    /* 板块 17: 开始使用 (整页唯一收口行动) */
    .sec-cta {
      background: linear-gradient(180deg, var(--bg-primary) 0%, #0d131f 100%);
      text-align: center;
      padding: 96px 0;
    }

    .cta-box {
      max-width: 760px;
      margin: 0 auto;
    }

    .cta-box h2 {
      font-size: 2.4rem;
      font-weight: 800;
      margin-bottom: 20px;
    }

    .cta-box p {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
    }

    /* 页脚 */
    .site-footer {
      background: #07080b;
      border-top: 1px solid var(--border-subtle);
      padding: 64px 0 32px;
      font-size: 0.88rem;
      color: var(--text-subtle);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-brand h4 {
      font-size: 1.15rem;
      color: #fff;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .footer-col h5 {
      font-size: 0.95rem;
      color: #fff;
      font-weight: 600;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8rem;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .demo-wrapper {
        grid-template-columns: 1fr;
      }
      .path-timeline, .result-grid, .crowd-grid, .entry-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .case-card {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .sec-title {
        font-size: 1.7rem;
      }
      .hero-title {
        font-size: 2.2rem;
      }
      .pain-grid, .stuck-grid, .news-grid, .reviews-grid, .sec-grid, .compare-grid, .metrics-bar {
        grid-template-columns: 1fr;
      }
      .path-timeline, .result-grid, .crowd-grid, .entry-grid {
        grid-template-columns: 1fr;
      }
      .notice-bar {
        flex-direction: column;
        align-items: flex-start;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
      }
    }