/* roulang page: index */
/* 设计系统与变量定义 */
    :root {
      --primary: #1f6feb;
      --primary-hover: #388bfd;
      --accent: #00d2ff;
      --accent-glow: rgba(0, 210, 255, 0.28);
      --bg-base: #060911;
      --bg-surface: #0c1322;
      --bg-card: #111a2e;
      --bg-card-hover: #17233d;
      --border: rgba(255, 255, 255, 0.08);
      --border-highlight: rgba(0, 210, 255, 0.35);
      --text-main: #f1f5f9;
      --text-sub: #94a3b8;
      --text-muted: #64748b;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-pill: 9999px;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
      --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.45);
      --container-width: 1240px;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    /* 基础重置 */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-stack);
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.68;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input {
      font-family: inherit;
    }

    /* 容器布局 */
    .container {
      width: 100%;
      max-width: var(--container-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 悬浮胶囊导航系统 */
    .header-capsule-wrapper {
      position: fixed;
      top: 18px;
      left: 0;
      right: 0;
      z-index: 1000;
      display: flex;
      justify-content: center;
      padding: 0 16px;
      pointer-events: none;
    }
    .header-nav {
      pointer-events: auto;
      background: rgba(12, 19, 34, 0.78);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-highlight);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 18px var(--accent-glow);
      border-radius: var(--radius-pill);
      padding: 8px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      width: 100%;
      max-width: 980px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 0.5px;
    }
    .brand-logo-icon {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--accent), var(--primary));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 12px var(--accent);
    }
    .brand-logo-icon svg {
      width: 16px;
      height: 16px;
      fill: #ffffff;
      margin-left: 2px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-sub);
      padding: 6px 14px;
      border-radius: var(--radius-pill);
    }
    .nav-links a:hover, .nav-links a.active {
      color: #ffffff;
      background: rgba(255, 255, 255, 0.08);
    }
    .nav-cta-btn {
      background: linear-gradient(135deg, var(--primary), var(--primary-hover));
      color: #fff;
      font-size: 0.88rem;
      font-weight: 600;
      padding: 8px 20px;
      border-radius: var(--radius-pill);
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 4px 14px rgba(31, 111, 235, 0.4);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .nav-cta-btn:hover {
      box-shadow: 0 6px 20px rgba(31, 111, 235, 0.6);
      transform: translateY(-1px);
    }

    /* 板块基础架构 */
    .section-block {
      padding: 88px 0;
      position: relative;
    }
    .section-block.alt-bg {
      background: linear-gradient(180deg, var(--bg-surface) 0%, rgba(12, 19, 34, 0.6) 100%);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.82rem;
      font-weight: 600;
      letter-spacing: 1px;
      text-transform: uppercase;
      color: var(--accent);
      background: rgba(0, 210, 255, 0.1);
      border: 1px solid rgba(0, 210, 255, 0.25);
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 700;
      line-height: 1.3;
      color: #ffffff;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-sub);
      max-width: 780px;
      line-height: 1.7;
    }

    /* 样式组件：按钮系统 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      font-size: 0.96rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }
    .btn-primary {
      background: linear-gradient(135deg, #1f6feb 0%, #0099ff 100%);
      color: #fff;
      box-shadow: 0 8px 24px rgba(31, 111, 235, 0.35);
    }
    .btn-primary:hover {
      box-shadow: 0 10px 28px rgba(31, 111, 235, 0.55);
      transform: translateY(-2px);
    }
    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      border-color: rgba(255, 255, 255, 0.15);
      color: var(--text-main);
    }
    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: rgba(255, 255, 255, 0.3);
    }

    /* 板块 1：Hero 试用申请全宽首屏 */
    .hero-section {
      padding-top: 150px;
      padding-bottom: 90px;
      position: relative;
      overflow: hidden;
      background: radial-gradient(circle at 50% 20%, rgba(31, 111, 235, 0.18) 0%, rgba(6, 9, 17, 0) 70%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      color: #ffffff;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-h1 span {
      background: linear-gradient(90deg, #ffffff 0%, #00d2ff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-summary {
      font-size: 1.12rem;
      color: var(--text-sub);
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .hero-badges-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 34px;
    }
    .hero-pill-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border);
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      font-size: 0.86rem;
      color: #cbd5e1;
    }
    .hero-pill-badge svg {
      width: 14px;
      height: 14px;
      fill: var(--accent);
    }
    /* 试用申请面板卡片 */
    .trial-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-highlight);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: var(--shadow-lg), 0 0 24px rgba(0, 210, 255, 0.1);
      position: relative;
    }
    .trial-box::before {
      content: "";
      position: absolute;
      top: -1px;
      left: 20%;
      right: 20%;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--accent), transparent);
    }
    .trial-title {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #ffffff;
    }
    .trial-desc {
      font-size: 0.92rem;
      color: var(--text-sub);
      margin-bottom: 22px;
    }
    .trial-input-group {
      margin-bottom: 16px;
    }
    .trial-input-group label {
      display: block;
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .trial-input-group input, .trial-input-group select {
      width: 100%;
      padding: 12px 16px;
      background: #090e1a;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 0.92rem;
      outline: none;
      transition: border 0.2s ease;
    }
    .trial-input-group input:focus, .trial-input-group select:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(0, 210, 255, 0.15);
    }
    .trial-terms-tip {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-top: 14px;
      line-height: 1.5;
    }

    /* 板块 2：传输与画质瓶颈对比（痛点聚焦） */
    .pain-points-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pain-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: transform 0.25s ease, border-color 0.25s ease;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      border-color: rgba(255, 255, 255, 0.2);
    }
    .pain-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }
    .pain-icon-wrapper {
      width: 44px;
      height: 44px;
      background: rgba(239, 68, 68, 0.12);
      border: 1px solid rgba(239, 68, 68, 0.3);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ef4444;
    }
    .pain-title {
      font-size: 1.15rem;
      font-weight: 600;
      color: #ffffff;
    }
    .pain-desc {
      font-size: 0.93rem;
      color: var(--text-sub);
      line-height: 1.65;
      margin-bottom: 14px;
    }
    .pain-solution-tag {
      font-size: 0.82rem;
      color: var(--accent);
      background: rgba(0, 210, 255, 0.08);
      padding: 6px 12px;
      border-radius: 6px;
      display: inline-block;
    }

    /* 板块 3：片库/全端列表轨（水平滑轨与矩阵） */
    .video-rail-scroll {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .rail-item-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      position: relative;
      transition: all 0.3s ease;
    }
    .rail-item-card:hover {
      border-color: var(--accent);
      box-shadow: 0 10px 24px rgba(0, 0, 0, 0.5);
      transform: translateY(-4px);
    }
    .rail-media-thumb {
      height: 180px;
      position: relative;
      background: #141c2e;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .rail-media-thumb::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 40%, rgba(6, 9, 17, 0.85) 100%);
    }
    .thumb-spec-badge {
      position: absolute;
      top: 12px;
      right: 12px;
      background: rgba(0, 0, 0, 0.75);
      backdrop-filter: blur(4px);
      color: var(--accent);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      border: 1px solid rgba(0, 210, 255, 0.3);
      z-index: 2;
    }
    .thumb-type-pill {
      position: absolute;
      bottom: 12px;
      left: 12px;
      background: var(--primary);
      color: #fff;
      font-size: 0.72rem;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: 4px;
      z-index: 2;
    }
    .rail-info {
      padding: 18px;
    }
    .rail-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 8px;
    }
    .rail-desc {
      font-size: 0.85rem;
      color: var(--text-sub);
      line-height: 1.55;
      margin-bottom: 12px;
    }
    .rail-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.78rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border);
      padding-top: 10px;
    }

    /* 板块 4：热播推荐流（非对称高光展映） */
    .spotlight-wrapper {
      display: grid;
      grid-template-columns: 1.25fr 0.75fr;
      gap: 28px;
      align-items: stretch;
    }
    .spotlight-main {
      background: linear-gradient(135deg, #10192e 0%, #0d1424 100%);
      border: 1px solid var(--border-highlight);
      border-radius: var(--radius-lg);
      padding: 36px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }
    .spotlight-tag-row {
      display: flex;
      gap: 10px;
      margin-bottom: 20px;
    }
    .spotlight-heading {
      font-size: 1.75rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 14px;
      line-height: 1.35;
    }
    .spotlight-text {
      font-size: 0.98rem;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .spotlight-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      border-top: 1px solid var(--border);
      padding-top: 20px;
    }
    .metric-col h4 {
      font-size: 1.45rem;
      font-weight: 700;
      color: var(--accent);
    }
    .metric-col p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .spotlight-side-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .side-item-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 18px 20px;
      transition: background 0.2s ease;
    }
    .side-item-card:hover {
      background: var(--bg-card-hover);
      border-color: rgba(255, 255, 255, 0.2);
    }
    .side-item-title {
      font-size: 0.98rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .side-item-text {
      font-size: 0.84rem;
      color: var(--text-sub);
      line-height: 1.5;
    }

    /* 板块 5：类型入口矩阵 */
    .genre-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
    }
    .genre-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      text-align: center;
      transition: all 0.25s ease;
      cursor: pointer;
    }
    .genre-card:hover {
      background: rgba(31, 111, 235, 0.12);
      border-color: var(--accent);
      transform: translateY(-4px);
    }
    .genre-icon {
      width: 48px;
      height: 48px;
      margin: 0 auto 12px;
      background: rgba(255, 255, 255, 0.05);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
    }
    .genre-name {
      font-size: 0.98rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 6px;
    }
    .genre-count {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 板块 6：片单分区与定制专题合集 */
    .collections-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .col-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 30px;
      position: relative;
      overflow: hidden;
    }
    .col-card::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--primary);
    }
    .col-card:nth-child(2)::after {
      background: var(--accent);
    }
    .col-card:nth-child(3)::after {
      background: #8b5cf6;
    }
    .col-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 14px;
    }
    .col-badge {
      font-size: 0.78rem;
      background: rgba(255, 255, 255, 0.06);
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      color: var(--text-sub);
    }
    .col-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 12px;
    }
    .col-desc {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.6;
      margin-bottom: 20px;
    }
    .col-list {
      list-style: none;
      border-top: 1px solid var(--border);
      padding-top: 14px;
    }
    .col-list li {
      font-size: 0.86rem;
      color: #cbd5e1;
      padding: 6px 0;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .col-list li::before {
      content: "•";
      color: var(--accent);
      font-size: 1.1rem;
    }

    /* 板块 7：综合口碑与热度排行榜 */
    .ranking-table-box {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
    }
    .ranking-item {
      display: grid;
      grid-template-columns: 70px 2.5fr 1fr 1fr 100px;
      align-items: center;
      padding: 18px 24px;
      border-bottom: 1px solid var(--border);
      transition: background 0.2s ease;
    }
    .ranking-item:last-child {
      border-bottom: none;
    }
    .ranking-item:hover {
      background: rgba(255, 255, 255, 0.03);
    }
    .rank-num {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--text-muted);
    }
    .rank-top1 { color: #f59e0b; }
    .rank-top2 { color: #94a3b8; }
    .rank-top3 { color: #d97706; }
    .rank-info-title {
      font-size: 0.98rem;
      font-weight: 600;
      color: #ffffff;
    }
    .rank-info-sub {
      font-size: 0.82rem;
      color: var(--text-muted);
    }
    .rank-tag {
      font-size: 0.82rem;
      color: #94a3b8;
    }
    .rank-score {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--accent);
    }
    .rank-action-link {
      font-size: 0.82rem;
      color: var(--primary-hover);
      text-align: right;
    }

    /* 板块 8：方法步骤（三步极速上手） */
    .steps-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      position: relative;
    }
    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 34px 28px;
      position: relative;
    }
    .step-number-tag {
      width: 42px;
      height: 42px;
      background: rgba(0, 210, 255, 0.1);
      border: 1px solid rgba(0, 210, 255, 0.3);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 20px;
    }
    .step-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 12px;
    }
    .step-desc {
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.65;
    }

    /* 板块 9：技术指标与成果数据 */
    .data-metrics-banner {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .metric-box-card {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      text-align: center;
      position: relative;
    }
    .metric-big-num {
      font-size: 2.6rem;
      font-weight: 800;
      background: linear-gradient(135deg, #ffffff 0%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
      line-height: 1.1;
    }
    .metric-name {
      font-size: 0.95rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 6px;
    }
    .metric-sub-detail {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 板块 10：客户证言与口碑墙 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-quote {
      font-size: 0.93rem;
      color: #e2e8f0;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .testi-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border);
      padding-top: 14px;
    }
    .testi-avatar-placeholder {
      width: 38px;
      height: 38px;
      background: #1e293b;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.85rem;
      color: var(--accent);
    }
    .testi-info h5 {
      font-size: 0.9rem;
      font-weight: 600;
      color: #ffffff;
    }
    .testi-info p {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    /* 板块 11：行业资讯与快讯流 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: border-color 0.2s ease;
    }
    .news-card:hover {
      border-color: var(--primary);
    }
    .news-date {
      font-size: 0.78rem;
      color: var(--accent);
      margin-bottom: 10px;
      font-weight: 600;
    }
    .news-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .news-brief {
      font-size: 0.87rem;
      color: var(--text-sub);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-more-btn {
      font-size: 0.82rem;
      color: var(--primary-hover);
      font-weight: 600;
    }

    /* 板块 12：追剧入口与双端协同唯一收口行动（CTA） */
    .cta-final-section {
      background: radial-gradient(circle at 50% 50%, rgba(31, 111, 235, 0.22) 0%, rgba(12, 19, 34, 0.85) 80%);
      border: 1px solid var(--border-highlight);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      text-align: center;
      position: relative;
      overflow: hidden;
      margin-bottom: 40px;
    }
    .cta-title {
      font-size: 2.3rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .cta-desc {
      font-size: 1.05rem;
      color: var(--text-sub);
      max-width: 680px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }
    .cta-action-row {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* 页脚系统 */
    .site-footer {
      background: #04060a;
      border-top: 1px solid var(--border);
      padding: 64px 0 32px;
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h3 {
      font-size: 1.3rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 0.86rem;
      color: var(--text-sub);
      line-height: 1.65;
      max-width: 360px;
    }
    .footer-col h4 {
      font-size: 0.92rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 16px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      font-size: 0.85rem;
      color: var(--text-sub);
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8rem;
    }
    .footer-domain-note {
      color: #475569;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .video-rail-scroll {
        grid-template-columns: repeat(2, 1fr);
      }
      .genre-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .data-metrics-banner {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .header-nav {
        padding: 6px 16px;
        gap: 16px;
      }
      .nav-links {
        display: none;
      }
      .hero-h1 {
        font-size: 2.15rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .pain-points-grid,
      .collections-grid,
      .steps-row,
      .testimonial-grid,
      .news-grid {
        grid-template-columns: 1fr;
      }
      .spotlight-wrapper {
        grid-template-columns: 1fr;
      }
      .ranking-item {
        grid-template-columns: 40px 1.8fr 1fr 70px;
      }
      .rank-tag {
        display: none;
      }
    }
    @media (max-width: 520px) {
      .video-rail-scroll {
        grid-template-columns: 1fr;
      }
      .genre-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .data-metrics-banner {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .ranking-item {
        grid-template-columns: 32px 1fr 60px;
      }
      .rank-action-link {
        display: none;
      }
      .hero-section {
        padding-top: 110px;
      }
    }