/* roulang page: index */
/* 设计变量与主题体系 */
    :root {
      --primary: #FF5722;
      --primary-hover: #E64A19;
      --primary-light: #FBE9E7;
      --secondary: #10B981;
      --secondary-dark: #059669;
      --dark-bg: #111827;
      --dark-surface: #1F2937;
      --dark-card: #0B0F19;
      --light-bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
      --shadow-orange: 0 10px 25px -5px rgba(255, 87, 34, 0.35);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-xl: 24px;
      --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    }

    /* 基础 Reset */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      font-size: 16px;
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      line-height: 1.6;
      color: var(--text-main);
      background-color: var(--light-bg);
      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;
      font-size: 1rem;
    }

    /* 布局容器 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .section-title-wrap {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 48px auto;
    }

    .badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 9999px;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }

    .badge-tag.green {
      background: #D1FAE5;
      color: var(--secondary-dark);
    }

    .section-heading {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 通用按钮 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      min-height: 48px;
      border-radius: 12px;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, #FF6E40 0%, #FF5722 100%);
      color: #FFFFFF;
      box-shadow: var(--shadow-orange);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #FF5722 0%, #E64A19 100%);
      transform: translateY(-2px);
      box-shadow: 0 14px 28px -6px rgba(255, 87, 34, 0.45);
    }

    .btn-outline {
      background: transparent;
      color: var(--text-main);
      border-color: var(--border-color);
    }

    .btn-outline:hover {
      background: #F1F5F9;
      border-color: #CBD5E1;
    }

    .btn-white {
      background: #FFFFFF;
      color: var(--primary);
      box-shadow: var(--shadow-md);
    }

    .btn-white:hover {
      background: #F8FAFC;
      transform: translateY(-2px);
    }

    /* 顶部双行导航 */
    .site-topbar {
      background-color: #1F2937;
      color: #9CA3AF;
      font-size: 0.8125rem;
      height: 36px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .topbar-left {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .topbar-badge {
      background: rgba(16, 185, 129, 0.2);
      color: #34D399;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
    }

    .topbar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .site-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      height: 72px;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, #FF5722 0%, #FF8A65 100%);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-weight: 900;
      font-size: 1.2rem;
      box-shadow: 0 4px 10px rgba(255, 87, 34, 0.3);
    }

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

    .nav-link {
      font-size: 0.96rem;
      font-weight: 600;
      color: #475569;
      position: relative;
      padding: 6px 0;
    }

    .nav-link:hover {
      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 {
      width: 100%;
    }

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

    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
      flex-direction: column;
      gap: 5px;
    }

    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      transition: 0.3s;
    }

    /* 各板块背景隔离规范 */
    .section-light {
      background-color: #FFFFFF;
      padding: 88px 0;
    }

    .section-soft {
      background-color: var(--light-bg);
      padding: 88px 0;
    }

    .section-dark {
      background-color: var(--dark-bg);
      color: #FFFFFF;
      padding: 96px 0;
    }

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

    .section-dark .section-desc {
      color: var(--text-light);
    }

    /* 1. Hero 区域（紧凑矮版 + 试用申请 + 权益资质） */
    .hero-compact {
      position: relative;
      background: linear-gradient(180deg, #FFFFFF 0%, #FFF5F2 100%);
      padding: 56px 0 72px 0;
      border-bottom: 1px solid #FFE4DD;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      letter-spacing: -1px;
      margin-bottom: 20px;
    }

    .hero-content h1 span {
      background: linear-gradient(135deg, #FF5722 0%, #FF7043 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-summary {
      font-size: 1.08rem;
      line-height: 1.8;
      color: var(--text-muted);
      margin-bottom: 28px;
    }

    .hero-perks-row {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 32px;
    }

    .perk-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      border: 1px solid #FED7AA;
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 0.875rem;
      font-weight: 600;
      color: #9A3412;
      box-shadow: var(--shadow-sm);
    }

    .hero-action-box {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .hero-device-tags {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .hero-card-panel {
      background: #FFFFFF;
      border-radius: var(--radius-xl);
      padding: 32px;
      box-shadow: 0 20px 40px -15px rgba(255, 87, 34, 0.15);
      border: 1px solid #FFEBE5;
      position: relative;
    }

    .trial-box-header {
      border-bottom: 1px solid #F1F5F9;
      padding-bottom: 18px;
      margin-bottom: 20px;
    }

    .trial-box-header h3 {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .trial-box-header span.tag {
      font-size: 0.75rem;
      background: #FEF3C7;
      color: #B45309;
      padding: 4px 10px;
      border-radius: 6px;
      font-weight: 600;
    }

    .trial-form-wrap {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group-item {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group-item label {
      font-size: 0.875rem;
      font-weight: 600;
      color: #334155;
    }

    .form-control-input {
      width: 100%;
      height: 46px;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 0 14px;
      font-size: 0.95rem;
      background: #F8FAFC;
      transition: all 0.2s;
    }

    .form-control-input:focus {
      outline: none;
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(255, 87, 34, 0.15);
    }

    /* 2. 分类入口墙 (Categories) */
    .category-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .category-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .category-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: #FDBA74;
    }

    .cat-icon-wrap {
      width: 54px;
      height: 54px;
      border-radius: 14px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
    }

    .category-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .category-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    .cat-meta-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-bottom: 16px;
    }

    .cat-meta-tags span {
      font-size: 0.75rem;
      background: #F1F5F9;
      color: #475569;
      padding: 3px 8px;
      border-radius: 4px;
    }

    .link-explore {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--primary);
    }

    /* 3. 精选课程推荐 (Featured Courses) */
    .courses-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .course-item-card {
      background: #FFFFFF;
      border-radius: var(--radius-xl);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .course-item-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }

    .course-thumb-box {
      position: relative;
      height: 220px;
      overflow: hidden;
      background: #E2E8F0;
    }

    .course-thumb-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .course-item-card:hover .course-thumb-box img {
      transform: scale(1.05);
    }

    .course-badge-level {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(17, 24, 39, 0.85);
      backdrop-filter: blur(4px);
      color: #FFFFFF;
      font-size: 0.78rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 6px;
    }

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

    .course-body h3 {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .course-body p {
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    .course-progress-indicator {
      margin-bottom: 18px;
    }

    .progress-labels {
      display: flex;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 6px;
    }

    .progress-bar-bg {
      width: 100%;
      height: 6px;
      background: #F1F5F9;
      border-radius: 9999px;
      overflow: hidden;
    }

    .progress-bar-fill {
      height: 100%;
      background: linear-gradient(90deg, #10B981, #059669);
      border-radius: 9999px;
    }

    .course-footer-info {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }

    .course-target-tag {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--secondary-dark);
    }

    /* 4. 数字化系统与硬件架构 (About Architecture) */
    .about-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .about-media-box {
      position: relative;
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }

    .about-media-box img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .spec-pill-float {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      display: flex;
      justify-content: space-around;
      text-align: center;
    }

    .spec-item .num {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      font-family: var(--font-mono);
    }

    .spec-item .lbl {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    .about-content-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .spec-bullet {
      display: flex;
      align-items: flex-start;
      gap: 16px;
    }

    .spec-bullet-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: #FEF3C7;
      color: #D97706;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-weight: 800;
    }

    .spec-bullet-text h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .spec-bullet-text p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 5. 核心优势六卡网格矩阵 (Features) */
    .features-grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      border-color: #FDBA74;
      box-shadow: var(--shadow-lg);
    }

    .feature-svg-icon {
      width: 50px;
      height: 50px;
      border-radius: 12px;
      background: #FFF7ED;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 1.18rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 6. 科学训教深度理念区（深色主题，#method） */
    .dark-workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
      margin-top: 40px;
    }

    .step-card {
      background: var(--dark-surface);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 28px 22px;
      position: relative;
    }

    .step-card::after {
      content: '→';
      position: absolute;
      right: -16px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 1.4rem;
      color: var(--primary);
      z-index: 2;
    }

    .step-card:last-child::after {
      display: none;
    }

    .step-order {
      font-family: var(--font-mono);
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 16px;
      opacity: 0.85;
    }

    .step-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 10px;
    }

    .step-card p {
      font-size: 0.9rem;
      color: #94A3B8;
      line-height: 1.6;
    }

    /* 7. 双场景交错式深度演示 (#scenes) */
    .scenes-wrapper {
      display: flex;
      flex-direction: column;
      gap: 56px;
    }

    .scene-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .scene-row.reverse {
      direction: rtl;
    }

    .scene-row.reverse > * {
      direction: ltr;
    }

    .scene-image-frame {
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      position: relative;
    }

    .scene-image-frame img {
      width: 100%;
      height: 360px;
      object-fit: cover;
    }

    .scene-text-content h3 {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.35;
    }

    .scene-text-content p {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 24px;
    }

    .scene-metrics-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .metric-bubble {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 14px 18px;
    }

    .metric-bubble strong {
      display: block;
      font-size: 1.15rem;
      color: var(--primary);
      font-family: var(--font-mono);
      margin-bottom: 2px;
    }

    .metric-bubble span {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 8. 传统线下培训 vs 数字化对比矩阵 (#comparison) */
    .comparison-table-wrapper {
      background: #FFFFFF;
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .comparison-table th, .comparison-table td {
      padding: 20px 24px;
      border-bottom: 1px solid #F1F5F9;
    }

    .comparison-table th {
      background: #F8FAFC;
      font-size: 1rem;
      font-weight: 700;
      color: #334155;
    }

    .comparison-table th.highlight, .comparison-table td.highlight {
      background: #FFF7ED;
      color: #9A3412;
      font-weight: 700;
    }

    .comparison-table tr:last-child td {
      border-bottom: none;
    }

    .dim-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .tag-diff-bad {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: #EF4444;
      font-weight: 600;
      font-size: 0.9rem;
    }

    .tag-diff-good {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: var(--secondary-dark);
      font-weight: 700;
      font-size: 0.92rem;
    }

    /* 9. 关键运营与训练数据统计条 (#stats) */
    .stats-bar-inner {
      background: linear-gradient(135deg, #FF5722 0%, #E64A19 100%);
      border-radius: var(--radius-xl);
      padding: 48px 36px;
      color: #FFFFFF;
      box-shadow: var(--shadow-orange);
    }

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

    .stat-box .stat-number {
      font-size: 2.6rem;
      font-weight: 900;
      font-family: var(--font-mono);
      line-height: 1.1;
      margin-bottom: 8px;
    }

    .stat-box .stat-label {
      font-size: 0.95rem;
      font-weight: 500;
      opacity: 0.92;
    }

    /* 10. 严选国家认证教练专家背书 (#coaches) */
    .coaches-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .coach-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: all 0.3s ease;
    }

    .coach-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #FED7AA;
    }

    .coach-avatar-box {
      width: 96px;
      height: 96px;
      margin: 0 auto 16px auto;
      border-radius: 50%;
      overflow: hidden;
      border: 3px solid #FFEDD5;
      background: #E2E8F0;
    }

    .coach-avatar-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .coach-card h3 {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .coach-badge-rank {
      display: inline-block;
      font-size: 0.78rem;
      background: #EFF6FF;
      color: #1D4ED8;
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .coach-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
      margin-bottom: 14px;
    }

    .coach-data-tag {
      font-size: 0.8rem;
      color: var(--primary);
      font-weight: 700;
      border-top: 1px dashed var(--border-color);
      padding-top: 10px;
    }

    /* 11. 真实学员与家长成长故事 (#stories) */
    .stories-grid-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .story-card-item {
      background: #FFFFFF;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-color);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .story-header-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
    }

    .student-info h3 {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .student-info span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .period-badge {
      background: #ECFDF5;
      color: var(--secondary-dark);
      font-size: 0.82rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 6px;
    }

    .comparison-score-box {
      background: #F8FAFC;
      border-radius: var(--radius-md);
      padding: 16px;
      margin-bottom: 20px;
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      text-align: center;
      gap: 12px;
    }

    .score-item .sub {
      font-size: 0.75rem;
      color: var(--text-muted);
      display: block;
    }

    .score-item .val {
      font-size: 1.45rem;
      font-weight: 900;
      font-family: var(--font-mono);
    }

    .score-item.before .val {
      color: #64748B;
    }

    .score-item.after .val {
      color: var(--primary);
    }

    .score-arrow {
      font-size: 1.2rem;
      color: #94A3B8;
      font-weight: 800;
    }

    .story-quote {
      font-size: 0.95rem;
      color: #334155;
      line-height: 1.7;
      font-style: italic;
      border-left: 3px solid var(--primary);
      padding-left: 14px;
    }

    /* 12. 体育中考资讯与训练动态摘要 (#news) */
    .news-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

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

    .news-cover-wrap {
      height: 180px;
      overflow: hidden;
      background: #E2E8F0;
    }

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

    .news-card:hover .news-cover-wrap img {
      transform: scale(1.06);
    }

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

    .news-meta-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 10px;
    }

    .news-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.45;
    }

    .news-body p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    .news-action-link {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      cursor: pointer;
    }

    /* 13. 异议拆解与常见问题手风琴 (#faq) */
    .faq-accordion-wrap {
      max-width: 860px;
      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: border-color 0.25s ease;
    }

    .faq-item.active {
      border-color: #FDBA74;
      box-shadow: var(--shadow-sm);
    }

    .faq-trigger {
      width: 100%;
      padding: 20px 24px;
      text-align: left;
      background: transparent;
      border: none;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }

    .faq-icon-arrow {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: #F1F5F9;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: 800;
      color: #64748B;
      transition: transform 0.3s ease, background 0.3s ease;
    }

    .faq-item.active .faq-icon-arrow {
      transform: rotate(180deg);
      background: #FFEDD5;
      color: var(--primary);
    }

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
      padding: 0 24px;
    }

    .faq-item.active .faq-content {
      max-height: 500px;
      padding: 0 24px 20px 24px;
      transition: max-height 0.35s ease-in-out, padding 0.3s ease;
    }

    .faq-content p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 14. 机构入驻与学员服务保障条 (#guarantee) */
    .guarantee-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .guarantee-box {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-lg);
      padding: 28px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .guarantee-shield-icon {
      width: 48px;
      height: 48px;
      margin: 0 auto 16px auto;
      background: #ECFDF5;
      color: var(--secondary-dark);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      font-weight: 900;
    }

    .guarantee-box h3 {
      font-size: 1.08rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .guarantee-box p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 底部全幅转化区 (#download) */
    .cta-full-wrap {
      position: relative;
      background: radial-gradient(circle at 80% 20%, #1F2937 0%, #0B0F19 100%);
      color: #FFFFFF;
      padding: 90px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      overflow: hidden;
    }

    .cta-content-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .cta-left h2 {
      font-size: 2.35rem;
      font-weight: 900;
      line-height: 1.3;
      margin-bottom: 18px;
    }

    .cta-left p {
      font-size: 1.08rem;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 32px;
    }

    .cta-dl-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .cta-right-box {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-xl);
      padding: 32px;
      text-align: center;
      backdrop-filter: blur(10px);
    }

    .qr-mock-box {
      width: 140px;
      height: 140px;
      background: #FFFFFF;
      border-radius: 12px;
      margin: 0 auto 16px auto;
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 6px;
    }

    .qr-mock-box svg {
      width: 100px;
      height: 100px;
    }

    .qr-mock-box span {
      font-size: 0.72rem;
      color: #334155;
      font-weight: 600;
    }

    .cta-right-box p {
      font-size: 0.88rem;
      color: #CBD5E1;
    }

    /* 页脚区域 (Footer) */
    .site-footer {
      background-color: #0B0F19;
      color: #94A3B8;
      padding: 64px 0 32px 0;
      border-top: 1px solid #1E293B;
      font-size: 0.9rem;
    }

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

    .footer-brand-col h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .footer-brand-col p {
      font-size: 0.92rem;
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 20px;
    }

    .footer-links-col h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 18px;
    }

    .footer-links-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-links-col a:hover {
      color: var(--primary);
    }

    .footer-bottom-bar {
      border-top: 1px solid #1E293B;
      padding-top: 28px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 10px;
      font-size: 0.82rem;
      color: #64748B;
    }

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

    .footer-bottom-bar a:hover {
      color: var(--primary);
    }

    /* 移动端固定底部悬浮转化条 */
    .mobile-float-cta {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 999;
      background: rgba(17, 24, 39, 0.95);
      backdrop-filter: blur(10px);
      padding: 10px 18px;
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.2);
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      align-items: center;
      justify-content: space-between;
    }

    .float-info-text strong {
      display: block;
      color: #FFFFFF;
      font-size: 0.9rem;
      line-height: 1.2;
    }

    .float-info-text span {
      font-size: 0.75rem;
      color: #34D399;
    }

    /* 弹窗样式 */
    .modal-overlay {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.6);
      backdrop-filter: blur(4px);
      z-index: 1000;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }

    .modal-overlay.active {
      display: flex;
    }

    .modal-box {
      background: #FFFFFF;
      width: 100%;
      max-width: 520px;
      border-radius: var(--radius-xl);
      padding: 32px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .modal-close-btn {
      position: absolute;
      top: 20px;
      right: 20px;
      background: transparent;
      border: none;
      font-size: 1.5rem;
      color: #94A3B8;
      cursor: pointer;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .category-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .dark-workflow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-card:nth-child(2)::after {
        display: none;
      }
      .stats-grid-4 {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
      }
      .coaches-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
      .cta-content-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      body {
        padding-bottom: 64px;
      }
      .site-topbar {
        display: none;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: #FFFFFF;
        flex-direction: column;
        align-items: flex-start;
        padding: 30px;
        gap: 20px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
      }
      .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
      }
      .mobile-menu-btn {
        display: flex;
      }
      .nav-actions {
        display: none;
      }
      .hero-content h1 {
        font-size: 2.1rem;
      }
      .courses-grid, .features-grid-6, .news-grid-3 {
        grid-template-columns: 1fr;
      }
      .about-layout {
        grid-template-columns: 1fr;
      }
      .scene-row, .scene-row.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
      }
      .stories-grid-2 {
        grid-template-columns: 1fr;
      }
      .dark-workflow-steps {
        grid-template-columns: 1fr;
      }
      .step-card::after {
        display: none;
      }
      .mobile-float-cta {
        display: flex;
      }
      .category-grid, .coaches-grid-4, .guarantee-grid-4, .stats-grid-4 {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
    }