/* roulang page: index */
:root {
      --primary: #0A382C;
      --primary-light: #0F5132;
      --primary-dark: #061A14;
      --accent: #10B981;
      --accent-hover: #059669;
      --accent-warm: #F97316;
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #071E17;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-light: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 12px 28px -4px rgba(10, 56, 44, 0.12);
      --container-max: 1240px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.7;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

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

    button, input {
      font-family: inherit;
    }

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

    /* 顶部双行导航系统 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .top-bar {
      background: var(--primary-dark);
      color: #94A3B8;
      font-size: 13px;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .top-bar-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse-green 2s infinite;
    }

    @keyframes pulse-green {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }

    .nav-bar {
      padding: 16px 0;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
    }

    .brand-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
    }

    .nav-menu {
      display: flex;
      list-style: none;
      gap: 28px;
      align-items: center;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-muted);
      position: relative;
      padding: 4px 0;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
    }

    .nav-cta {
      background: var(--primary);
      color: #fff;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(10, 56, 44, 0.2);
    }

    .nav-cta:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* Section 通用系统 */
    section {
      padding: 88px 0;
      position: relative;
    }

    .section-alt {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-dark {
      background: var(--bg-dark);
      color: #FFFFFF;
    }

    .section-header {
      margin-bottom: 52px;
      max-width: 760px;
    }

    .section-header.text-center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      padding: 5px 12px;
      background: rgba(16, 185, 129, 0.12);
      color: var(--primary-light);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      border: 1px solid rgba(16, 185, 129, 0.2);
    }

    .section-dark .section-badge {
      background: rgba(16, 185, 129, 0.2);
      color: #34D399;
      border-color: rgba(52, 211, 153, 0.3);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .section-dark .section-title {
      color: #FFFFFF;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 板块1：Hero 白皮书获客与首屏 */
    #hero {
      padding: 60px 0 80px;
      background: linear-gradient(180deg, #F0FDF4 0%, var(--bg-main) 100%);
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 40px;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.03em;
      color: var(--primary-dark);
      margin-bottom: 20px;
    }

    .hero-content p.hero-summary {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
    }

    .hero-badges-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 32px;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      background: #FFFFFF;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    .hero-card-download {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: 0 20px 40px -15px rgba(10, 56, 44, 0.1);
      position: relative;
    }

    .whitepaper-cover {
      display: flex;
      gap: 18px;
      padding-bottom: 20px;
      margin-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .whitepaper-thumb {
      width: 86px;
      height: 114px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 10px rgba(0,0,0,0.15);
      flex-shrink: 0;
    }

    .whitepaper-meta h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .whitepaper-meta p {
      font-size: 13px;
      color: var(--text-light);
      line-height: 1.5;
    }

    .hero-form-group {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .hero-input {
      width: 100%;
      padding: 12px 16px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: var(--transition);
      background: #F8FAFC;
    }

    .hero-input:focus {
      border-color: var(--primary);
      background: #FFFFFF;
    }

    .hero-submit-btn {
      width: 100%;
      padding: 14px 20px;
      background: var(--primary);
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition);
    }

    .hero-submit-btn:hover {
      background: var(--primary-light);
    }

    .form-tip {
      font-size: 12px;
      color: var(--text-light);
      text-align: center;
    }

    /* 板块2：KPI 核心看板 */
    #kpi-board {
      padding: 50px 0;
      background: var(--primary);
      color: #FFFFFF;
    }

    .kpi-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .kpi-card {
      padding: 24px;
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      text-align: center;
    }

    .kpi-num {
      font-size: 38px;
      font-weight: 900;
      letter-spacing: -0.03em;
      color: #34D399;
      margin-bottom: 6px;
      font-feature-settings: 'tnum';
    }

    .kpi-label {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .kpi-desc {
      font-size: 12px;
      color: #CBD5E1;
      line-height: 1.5;
    }

    /* 板块3：球迷痛点与产品破局区 */
    .painpoint-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .painpoint-card {
      background: #FFFFFF;
      border: 1px solid #FEE2E2;
      border-radius: var(--radius-md);
      padding: 28px;
      margin-bottom: 20px;
    }

    .painpoint-item {
      display: flex;
      gap: 16px;
      margin-bottom: 18px;
    }

    .painpoint-item:last-child {
      margin-bottom: 0;
    }

    .painpoint-dot {
      width: 24px;
      height: 24px;
      background: #FEE2E2;
      color: #DC2626;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 800;
      flex-shrink: 0;
    }

    .painpoint-text h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 4px;
      color: #991B1B;
    }

    .painpoint-text p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .solution-card {
      background: #ECFDF5;
      border: 1px solid #A7F3D0;
      border-radius: var(--radius-md);
      padding: 32px;
    }

    .solution-item {
      display: flex;
      gap: 16px;
      margin-bottom: 24px;
    }

    .solution-item:last-child {
      margin-bottom: 0;
    }

    .solution-icon {
      width: 28px;
      height: 28px;
      background: var(--accent);
      color: #FFFFFF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 800;
      flex-shrink: 0;
    }

    .solution-text h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 4px;
      color: var(--primary);
    }

    .solution-text p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块4：服务矩阵（6宫格） */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .service-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: var(--transition);
      position: relative;
    }

    .service-box:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      background: rgba(16, 185, 129, 0.1);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 22px;
      margin-bottom: 20px;
    }

    .service-box h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .service-box p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块5：结果对比（我们 VS 传统平台） */
    .comparison-table-wrapper {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .comp-row {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr;
      padding: 20px 28px;
      border-bottom: 1px solid var(--border-color);
      align-items: center;
    }

    .comp-row:last-child {
      border-bottom: none;
    }

    .comp-header {
      background: #F8FAFC;
      font-weight: 700;
      font-size: 15px;
      color: var(--text-main);
    }

    .comp-feature {
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      flex-direction: column;
    }

    .comp-feature span {
      font-size: 12px;
      color: var(--text-light);
      font-weight: normal;
      margin-top: 2px;
    }

    .comp-target {
      color: var(--primary-light);
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .comp-legacy {
      color: var(--text-light);
    }

    /* 板块6：里程碑与发展演进 */
    .timeline-wrap {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
    }

    .timeline-wrap::before {
      content: '';
      position: absolute;
      left: 50%;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--border-color);
      transform: translateX(-50%);
    }

    .timeline-item {
      display: flex;
      justify-content: space-between;
      margin-bottom: 40px;
      position: relative;
    }

    .timeline-item:nth-child(even) {
      flex-direction: row-reverse;
    }

    .timeline-content {
      width: 44%;
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .timeline-item:nth-child(even) .timeline-content {
      text-align: right;
    }

    .timeline-badge {
      position: absolute;
      left: 50%;
      top: 20px;
      transform: translateX(-50%);
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: var(--accent);
      border: 4px solid #FFFFFF;
      box-shadow: 0 0 0 2px var(--primary);
    }

    .timeline-date {
      font-size: 13px;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 6px;
    }

    .timeline-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .timeline-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块7：深色技术安全与传输架构 */
    .arch-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .arch-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: var(--transition);
    }

    .arch-card:hover {
      background: rgba(255, 255, 255, 0.07);
      border-color: var(--accent);
    }

    .arch-code {
      font-family: monospace;
      font-size: 12px;
      color: #34D399;
      background: rgba(0, 0, 0, 0.4);
      padding: 4px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 14px;
    }

    .arch-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 12px;
    }

    .arch-card p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* 板块8：精选资讯与社区精华摘要 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .news-img-box {
      width: 100%;
      aspect-ratio: 16/9;
      overflow: hidden;
      background: #E2E8F0;
    }

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

    .news-card:hover .news-img-box img {
      transform: scale(1.05);
    }

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

    .news-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 10px;
    }

    .news-tag {
      background: rgba(10, 56, 44, 0.08);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    .news-title {
      font-size: 17px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .news-excerpt {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex: 1;
    }

    .news-link {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块9：真实球友口碑评价 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }

    .testi-header {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }

    .testi-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var--primary);
      border: 2px solid var(--accent);
    }

    .testi-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }

    .testi-badge {
      font-size: 12px;
      color: #047857;
      background: #D1FAE5;
      padding: 1px 8px;
      border-radius: 4px;
      font-weight: 600;
      display: inline-block;
      margin-top: 2px;
    }

    .testi-stars {
      color: #F59E0B;
      font-size: 14px;
      margin-bottom: 12px;
      letter-spacing: 2px;
    }

    .testi-content {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块10：适用人群与圈层场景 */
    .audiences-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .audience-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: var(--transition);
    }

    .audience-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }

    .audience-icon {
      width: 52px;
      height: 52px;
      margin: 0 auto 16px;
      background: rgba(16, 185, 129, 0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 24px;
    }

    .audience-card h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .audience-card p {
      font-size: 13px;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* 板块11：常见疑问 FAQ 手风琴 */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: #CBD5E1;
    }

    .faq-question {
      padding: 22px 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      font-weight: 700;
      font-size: 16px;
      color: var(--text-main);
    }

    .faq-icon-arrow {
      width: 20px;
      height: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: transform 0.3s ease;
      color: var(--text-light);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s ease;
      background: #F8FAFC;
      border-top: 1px solid transparent;
      padding: 0 28px;
    }

    .faq-item.active .faq-answer {
      max-height: 260px;
      padding: 18px 28px 24px;
      border-top-color: var(--border-color);
    }

    .faq-answer p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 板块12：多端下载与行动号召 */
    #download {
      background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
      color: #FFFFFF;
      padding: 90px 0;
    }

    .download-box {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 56px 40px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
    }

    .download-text h2 {
      font-size: 34px;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
      color: #FFFFFF;
    }

    .download-text p {
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 30px;
    }

    .download-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .btn-download-app {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: #FFFFFF;
      color: var(--primary-dark);
      padding: 14px 26px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 15px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    }

    .btn-download-app:hover {
      background: #F1F5F9;
      transform: translateY(-2px);
    }

    .btn-download-outline {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: transparent;
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.3);
      padding: 14px 26px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 15px;
    }

    .btn-download-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #FFFFFF;
    }

    .download-card-qr {
      background: #FFFFFF;
      color: var(--text-main);
      padding: 30px;
      border-radius: var(--radius-md);
      text-align: center;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }

    .qr-placeholder {
      width: 170px;
      height: 170px;
      margin: 0 auto 16px;
      border: 2px dashed var(--accent);
      border-radius: var(--radius-sm);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: #F8FAFC;
    }

    .qr-placeholder svg {
      width: 48px;
      height: 48px;
      fill: var(--primary);
    }

    .qr-text {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 600;
    }

    .qr-subtext {
      font-size: 11px;
      color: var(--text-light);
      margin-top: 4px;
    }

    /* 统一页脚 */
    .site-footer {
      background: #04120E;
      color: #94A3B8;
      font-size: 14px;
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
      letter-spacing: -0.01em;
    }

    .footer-col p {
      font-size: 13px;
      line-height: 1.8;
      color: #94A3B8;
      margin-bottom: 16px;
    }

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

    .footer-links a:hover {
      color: #34D399;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      text-align: center;
      font-size: 12px;
      color: #64748B;
    }

    .footer-bottom a {
      color: #94A3B8;
    }

    .footer-bottom a:hover {
      color: #FFFFFF;
    }

    /* 移动端菜单抽屉 */
    .mobile-drawer {
      position: fixed;
      top: 0;
      right: -100%;
      width: 280px;
      height: 100vh;
      background: #FFFFFF;
      z-index: 2000;
      box-shadow: -6px 0 24px rgba(0,0,0,0.15);
      display: flex;
      flex-direction: column;
      padding: 30px 24px;
      transition: right 0.35s ease;
    }

    .mobile-drawer.open {
      right: 0;
    }

    .drawer-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.4);
      backdrop-filter: blur(4px);
      z-index: 1999;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.35s ease;
    }

    .drawer-overlay.open {
      opacity: 1;
      pointer-events: auto;
    }

    .drawer-close {
      align-self: flex-end;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
      margin-bottom: 24px;
    }

    .drawer-menu {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .drawer-menu a {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .services-grid, .arch-grid, .news-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .audiences-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .download-box {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 56px 0;
      }
      .nav-menu, .nav-cta {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .painpoint-grid {
        grid-template-columns: 1fr;
      }
      .services-grid, .arch-grid, .news-grid, .testimonial-grid, .audiences-grid {
        grid-template-columns: 1fr;
      }
      .timeline-wrap::before {
        left: 20px;
      }
      .timeline-item {
        flex-direction: column !important;
        padding-left: 48px;
        margin-bottom: 30px;
      }
      .timeline-content {
        width: 100% !important;
        text-align: left !important;
      }
      .timeline-badge {
        left: 20px;
        top: 24px;
      }
      .hero-content h1 {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .comp-row {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .comp-header {
        display: none;
      }
    }