/* roulang page: index */
:root {
      --primary: #1D4ED8;
      --primary-dark: #1E40AF;
      --primary-light: #3B82F6;
      --accent: #EA580C;
      --accent-hover: #C2410C;
      --accent-blue: #0284C7;
      --bg-main: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-alt: #F1F5F9;
      --bg-dark: #0F172A;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --border-dark: #334155;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
      --shadow-md: 0 4px 12px -2px rgba(0,0,0,0.08), 0 2px 6px -1px rgba(0,0,0,0.04);
      --shadow-lg: 0 12px 28px -4px rgba(29, 78, 216, 0.12), 0 8px 10px -4px rgba(0,0,0,0.04);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

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

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

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

    button, input, select {
      font-family: inherit;
      font-size: 1rem;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部辅助条 */
    .top-bar {
      background-color: #0B192C;
      color: #94A3B8;
      font-size: 0.85rem;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-bar-highlight {
      color: #38BDF8;
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 主导航栏 */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: background 0.3s;
    }
    .nav-container {
      height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.45rem;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    .brand-tag {
      background: var(--primary);
      color: #FFF;
      font-size: 0.72rem;
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      letter-spacing: 0;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 8px 2px;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary);
      color: #FFF;
      font-weight: 600;
      font-size: 0.92rem;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      box-shadow: 0 4px 14px rgba(29, 78, 216, 0.28);
      transition: all 0.25s ease;
    }
    .nav-cta:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(29, 78, 216, 0.36);
    }

    /* 移动端菜单切换 */
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
      padding: 6px;
    }

    /* 通用板块规范 */
    .section-wrap {
      padding: 80px 0;
    }
    .section-title-wrap {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 54px;
    }
    .section-badge {
      display: inline-block;
      padding: 5px 14px;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      border-radius: var(--radius-full);
      background-color: rgba(29, 78, 216, 0.08);
      color: var(--primary);
      margin-bottom: 12px;
    }
    .section-badge-orange {
      background-color: rgba(234, 88, 12, 0.1);
      color: var(--accent);
    }
    .section-badge-dark {
      background-color: rgba(255, 255, 255, 0.12);
      color: #38BDF8;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.3;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      border-radius: var(--radius-md);
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      gap: 8px;
    }
    .btn-primary {
      background: var(--primary);
      color: #FFF;
      box-shadow: 0 4px 14px rgba(29, 78, 216, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(29, 78, 216, 0.35);
    }
    .btn-accent {
      background: var(--accent);
      color: #FFF;
      box-shadow: 0 4px 14px rgba(234, 88, 12, 0.3);
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background: rgba(29, 78, 216, 0.05);
    }

    /* 板块一：Hero 预约到店蓝图 */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #EFF6FF 0%, #FFFFFF 50%, #F0FDF4 100%);
      padding: 70px 0 80px;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-text h1 {
      font-size: 2.85rem;
      font-weight: 800;
      color: #0F172A;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-text h1 span {
      color: var(--primary);
      position: relative;
    }
    .hero-intro {
      font-size: 1.08rem;
      color: #475569;
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .hero-features-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-bottom: 32px;
    }
    .hero-feature-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.95rem;
      color: #1E293B;
      font-weight: 600;
    }
    .feature-icon-dot {
      width: 20px;
      height: 20px;
      border-radius: var(--radius-full);
      background: #DBEAFE;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
    }

    /* 预约到店组件卡片 */
    .booking-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 34px 30px;
      box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.12), 0 0 0 1px rgba(226, 232, 240, 0.8);
      position: relative;
    }
    .booking-card-header {
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 16px;
      margin-bottom: 22px;
    }
    .booking-title {
      font-size: 1.28rem;
      font-weight: 700;
      color: #0F172A;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .booking-slot-pill {
      font-size: 0.76rem;
      background: #FEF3C7;
      color: #B45309;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      font-weight: 700;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: #334155;
      margin-bottom: 7px;
    }
    .form-control {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background-color: #F8FAFC;
      color: #0F172A;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
      background-color: #FFF;
      box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.15);
    }
    .time-slot-picker {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 8px;
      margin-bottom: 20px;
    }
    .time-pill {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 9px 4px;
      text-align: center;
      font-size: 0.82rem;
      font-weight: 600;
      cursor: pointer;
      background: #FFF;
      color: #475569;
      transition: all 0.2s;
    }
    .time-pill:hover, .time-pill.selected {
      border-color: var(--primary);
      background-color: #EFF6FF;
      color: var(--primary);
    }
    .booking-btn {
      width: 100%;
      height: 48px;
      background: var(--primary);
      color: #FFF;
      border: none;
      border-radius: var(--radius-md);
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(29, 78, 216, 0.3);
      transition: all 0.25s;
    }
    .booking-btn:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }
    .booking-note {
      text-align: center;
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-top: 12px;
    }

    /* 板块二：秒杀闪购活动条 */
    .flash-sale-bar {
      background: linear-gradient(90deg, #1E1B4B 0%, #312E81 50%, #1E3A8A 100%);
      color: #FFF;
      padding: 24px 0;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .flash-sale-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .sale-badge {
      background: #DC2626;
      color: #FFF;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 4px 10px;
      border-radius: 4px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .flash-title-area {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .flash-text {
      font-size: 1.12rem;
      font-weight: 700;
    }
    .countdown-timer {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .timer-block {
      background: rgba(0,0,0,0.4);
      border: 1px solid rgba(255,255,255,0.2);
      padding: 6px 10px;
      border-radius: 6px;
      font-weight: 800;
      font-size: 1.05rem;
      color: #FBBF24;
      min-width: 38px;
      text-align: center;
    }
    .timer-colon {
      font-weight: 800;
      color: #FBBF24;
    }
    .stock-tag {
      background: rgba(234, 88, 12, 0.2);
      border: 1px solid rgba(234, 88, 12, 0.4);
      color: #FDBA74;
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      font-weight: 600;
    }

    /* 板块三：KPI 关键运营与教学看板 */
    .kpi-section {
      background: #FFFFFF;
      padding: 60px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .kpi-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .kpi-card {
      text-align: center;
      padding: 24px 16px;
      background: #F8FAFC;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: transform 0.25s;
    }
    .kpi-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #BFDBFE;
    }
    .kpi-num {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -1px;
    }
    .kpi-num span {
      font-size: 1.4rem;
      font-weight: 700;
      margin-left: 2px;
    }
    .kpi-label {
      font-size: 1.05rem;
      font-weight: 700;
      color: #1E293B;
      margin-bottom: 6px;
    }
    .kpi-subtext {
      font-size: 0.82rem;
      color: var(--text-muted);
      line-height: 1.4;
    }

    /* 板块四：服务矩阵 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .matrix-card:hover {
      border-color: #93C5FD;
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
    }
    .matrix-icon-box {
      width: 58px;
      height: 58px;
      border-radius: 14px;
      background: #EFF6FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin-bottom: 22px;
    }
    .matrix-title {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #0F172A;
    }
    .matrix-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .matrix-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 24px;
    }
    .matrix-tag {
      background: #F1F5F9;
      color: #475569;
      font-size: 0.78rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 6px;
    }

    /* 板块五：软硬件技术架构支撑 */
    .arch-section {
      background-color: #FFFFFF;
      padding: 80px 0;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .arch-img-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .arch-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .arch-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .arch-num {
      width: 36px;
      height: 36px;
      flex-shrink: 0;
      background: #EFF6FF;
      border: 1px solid #BFDBFE;
      color: var(--primary);
      font-weight: 800;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
    }
    .arch-item-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 6px;
    }
    .arch-item-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块六：数字化运动训练全流程演示 */
    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .workflow-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }
    .workflow-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
      border-color: #93C5FD;
    }
    .step-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 800;
      color: var(--accent);
      background: #FFF7ED;
      padding: 3px 10px;
      border-radius: 4px;
      margin-bottom: 16px;
    }
    .step-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 12px;
    }
    .step-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块七：训练前后结果对比 (Before / After) */
    .compare-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }
    .compare-table th {
      background: #F8FAFC;
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #0F172A;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th.highlight-th {
      background: #EFF6FF;
      color: var(--primary);
    }
    .compare-table td {
      padding: 20px 24px;
      font-size: 0.95rem;
      color: #334155;
      border-bottom: 1px solid var(--border-color);
      background: #FFF;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table td.highlight-td {
      background: #F0FDF4;
      font-weight: 600;
      color: #15803D;
    }

    /* 板块八：深色沉浸区 - 运动生理学理念与预警 */
    .philosophy-section {
      background: var(--bg-dark);
      color: #F8FAFC;
      padding: 90px 0;
      position: relative;
    }
    .philosophy-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .philosophy-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 36px;
      backdrop-filter: blur(8px);
    }
    .philosophy-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 20px;
      line-height: 1.3;
    }
    .philosophy-desc {
      font-size: 1.05rem;
      color: #94A3B8;
      line-height: 1.8;
      margin-bottom: 28px;
    }
    .metric-row {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .metric-box {
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid rgba(56, 189, 248, 0.25);
      border-radius: var(--radius-md);
      padding: 18px 20px;
    }
    .metric-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: #38BDF8;
      margin-bottom: 4px;
    }
    .metric-name {
      font-size: 0.85rem;
      color: #CBD5E1;
    }

    /* 板块九：产品与课程体系分类 */
    .course-category-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .course-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .course-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: #93C5FD;
    }
    .course-card-body {
      padding: 28px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .course-badge-row {
      display: flex;
      gap: 8px;
      margin-bottom: 14px;
    }
    .course-badge {
      font-size: 0.76rem;
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
    }
    .badge-cyan { background: #E0F2FE; color: #0369A1; }
    .badge-amber { background: #FEF3C7; color: #B45309; }
    .badge-emerald { background: #DCFCE7; color: #15803D; }
    .course-h3 {
      font-size: 1.3rem;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 12px;
    }
    .course-summary {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .course-meta-list {
      list-style: none;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
      margin-bottom: 20px;
      font-size: 0.88rem;
      color: #334155;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    /* 板块十：发展里程碑时间线 */
    .timeline-wrap {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
      padding-left: 30px;
    }
    .timeline-wrap::before {
      content: '';
      position: absolute;
      left: 10px;
      top: 10px;
      bottom: 10px;
      width: 2px;
      background: #CBD5E1;
    }
    .timeline-item {
      position: relative;
      margin-bottom: 36px;
    }
    .timeline-item:last-child {
      margin-bottom: 0;
    }
    .timeline-dot {
      position: absolute;
      left: -26px;
      top: 4px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--primary);
      border: 3px solid #EFF6FF;
      box-shadow: 0 0 0 2px var(--primary);
    }
    .timeline-content {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px 26px;
      box-shadow: var(--shadow-sm);
    }
    .timeline-date {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .timeline-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 8px;
    }
    .timeline-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块十一：行业资讯动态 */
    .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-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.25s ease;
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .news-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-tag-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
    }
    .news-badge {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--accent-blue);
      background: #F0F9FF;
      padding: 3px 8px;
      border-radius: 4px;
    }
    .news-time {
      font-size: 0.78rem;
      color: var(--text-light);
    }
    .news-h3 {
      font-size: 1.12rem;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .news-snippet {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    /* 板块十二：平台服务与安全保障 */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .guarantee-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .guarantee-icon {
      font-size: 2rem;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .guarantee-item-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 8px;
    }
    .guarantee-item-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块十三：常见疑问解答 FAQ */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-accordion {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #0F172A;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background-color: #F8FAFC;
    }
    .faq-arrow {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 22px;
      font-size: 0.95rem;
      color: #475569;
      line-height: 1.7;
      border-top: 1px solid #F1F5F9;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 页脚设计 */
    .footer {
      background-color: #0F172A;
      color: #94A3B8;
      padding: 70px 0 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 1fr 0.8fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand {
      font-size: 1.35rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
      display: inline-block;
    }
    .footer-about {
      line-height: 1.7;
      margin-bottom: 20px;
      color: #94A3B8;
      font-size: 0.92rem;
    }
    .footer-heading {
      font-size: 1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: #38BDF8;
    }
    .footer-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 0.88rem;
    }
    .qr-placeholder {
      width: 108px;
      height: 108px;
      background: #1E293B;
      border: 1px dashed rgba(255,255,255,0.25);
      border-radius: var(--radius-sm);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      color: #64748B;
      font-size: 0.75rem;
      margin-bottom: 8px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
    }
    .footer-bottom a {
      color: #64748B;
    }
    .footer-bottom a:hover {
      color: #94A3B8;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .arch-grid, .philosophy-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .matrix-grid, .course-category-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-grid, .guarantee-grid, .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        gap: 16px;
      }
      .nav-menu.open {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .matrix-grid, .course-category-grid, .news-grid, .workflow-grid, .guarantee-grid, .kpi-grid {
        grid-template-columns: 1fr;
      }
      .hero-text h1 {
        font-size: 2.1rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .time-slot-picker {
        grid-template-columns: repeat(2, 1fr);
      }
    }