/* roulang page: index */
:root {
      --primary: #4F46E5;
      --primary-hover: #4338CA;
      --secondary: #06B6D4;
      --accent: #8B5CF6;
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0F172A;
      --text-title: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --border-focus: rgba(79, 70, 229, 0.4);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-card: 0 10px 30px -10px rgba(79, 70, 229, 0.08);
      --shadow-hover: 0 20px 40px -15px rgba(79, 70, 229, 0.16);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-main);
      color: var(--text-body);
      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 {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部微型信息条 */
    .top-bar {
      background: #0B1120;
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 38px;
    }
    .top-bar-left span {
      margin-right: 18px;
    }
    .top-bar-right a {
      color: #CBD5E1;
      margin-left: 16px;
    }
    .top-bar-right a:hover {
      color: #38BDF8;
    }

    /* 主导航 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: background 0.3s ease;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 74px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-title);
      letter-spacing: -0.5px;
    }
    .logo-badge {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 999px;
      font-weight: 600;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      align-items: center;
      gap: 28px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: 999px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #6366F1);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover), #4F46E5);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
    }
    .btn-secondary {
      background: #F1F5F9;
      color: var(--text-title);
    }
    .btn-secondary:hover {
      background: #E2E8F0;
    }
    .btn-outline-light {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.25);
      color: #FFFFFF;
    }
    .btn-outline-light:hover {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.08);
    }

    /* 移动端菜单开关 */
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .menu-toggle span {
      width: 24px;
      height: 2px;
      background: var(--text-title);
      transition: 0.3s;
    }

    /* 板块共用标题规范 */
    .section-wrap {
      padding: 88px 0;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      background: rgba(79, 70, 229, 0.08);
      color: var(--primary);
      border-radius: 999px;
      font-size: 0.8125rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      margin-bottom: 12px;
      border: 1px solid rgba(79, 70, 229, 0.16);
    }
    .section-title {
      font-size: clamp(1.75rem, 3.2vw, 2.4rem);
      font-weight: 800;
      color: var(--text-title);
      letter-spacing: -0.5px;
      line-height: 1.25;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      max-width: 780px;
      line-height: 1.7;
    }

    /* 1. Hero 优惠券墙入口 + 轮播舞台 */
    .hero-section {
      position: relative;
      background: linear-gradient(180deg, #EDF2F7 0%, #F8FAFC 100%);
      padding: 60px 0 90px;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-h1 {
      font-size: clamp(2.2rem, 4.5vw, 3.4rem);
      font-weight: 900;
      line-height: 1.18;
      color: var(--text-title);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-h1 span {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-p {
      font-size: 1.125rem;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 30px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 32px;
    }
    .hero-meta-strip {
      display: flex;
      align-items: center;
      gap: 24px;
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .hero-meta-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 优惠券墙主券面放大组件 */
    .coupon-wall-card {
      background: linear-gradient(135deg, #1E1B4B, #312E81);
      border-radius: var(--radius-lg);
      padding: 32px;
      color: #FFFFFF;
      position: relative;
      box-shadow: 0 24px 50px -12px rgba(79, 70, 229, 0.3);
      border: 1px solid rgba(255, 255, 255, 0.15);
      overflow: hidden;
    }
    .coupon-tag {
      display: inline-block;
      background: #F43F5E;
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .coupon-val {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1;
      margin-bottom: 8px;
      color: #38BDF8;
    }
    .coupon-title {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .coupon-desc {
      font-size: 0.875rem;
      color: #C7D2FE;
      margin-bottom: 22px;
      line-height: 1.5;
    }
    .coupon-btn {
      width: 100%;
      background: #F8FAFC;
      color: #1E1B4B;
      font-weight: 800;
      border: none;
      padding: 14px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
      transition: all 0.2s;
    }
    .coupon-btn:hover {
      background: #FFFFFF;
      transform: scale(1.02);
    }
    .coupon-dots {
      position: absolute;
      right: -20px;
      bottom: -20px;
      width: 140px;
      height: 140px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.04);
      pointer-events: none;
    }

    /* 2. 痛点反思与行业挑战 (Pain Points) */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pain-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      position: relative;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(79, 70, 229, 0.3);
    }
    .pain-card.highlight {
      border-top: 4px solid var(--primary);
    }
    .pain-num {
      font-size: 1.75rem;
      font-weight: 900;
      color: #CBD5E1;
      margin-bottom: 14px;
    }
    .pain-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
    }
    .pain-text {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 3. 核心能力与多模态架构 (Intro) */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .intro-img-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 16px 36px rgba(15, 23, 42, 0.12);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .intro-content .intro-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-title);
      margin-bottom: 18px;
      line-height: 1.3;
    }
    .intro-content p {
      font-size: 1rem;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 18px;
    }
    .param-box {
      background: #F1F5F9;
      border-left: 4px solid var(--primary);
      padding: 16px 20px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      margin-top: 24px;
    }
    .param-title {
      font-weight: 700;
      font-size: 0.9375rem;
      color: var(--text-title);
      margin-bottom: 6px;
    }
    .param-detail {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 4. 核心优势 6 宫格大卡 (Core Advantages) */
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .adv-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(79, 70, 229, 0.35);
    }
    .adv-icon-badge {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: linear-gradient(135deg, rgba(79, 70, 229, 0.12), rgba(6, 182, 212, 0.12));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      color: var(--primary);
      margin-bottom: 22px;
    }
    .adv-card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
    }
    .adv-card-desc {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 5. 热门版本与解决方案 (Hot Products) */
    .tier-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .tier-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .tier-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 16px 40px rgba(79, 70, 229, 0.15);
      transform: scale(1.03);
    }
    .tier-ribbon {
      position: absolute;
      top: -14px;
      right: 28px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 999px;
    }
    .tier-name {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--text-title);
      margin-bottom: 8px;
    }
    .tier-target {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .tier-list {
      list-style: none;
      margin: 24px 0 32px;
      flex-grow: 1;
    }
    .tier-list li {
      font-size: 0.9375rem;
      color: var(--text-body);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .tier-list li::before {
      content: '✓';
      color: var(--primary);
      font-weight: 800;
    }

    /* 6. 技术理念与沉浸式黑底深层区 (Tech Deep-dive) */
    .tech-section {
      background-color: var(--bg-dark);
      color: #FFFFFF;
      padding: 100px 0;
      position: relative;
      overflow: hidden;
    }
    .tech-header .section-badge {
      background: rgba(56, 189, 248, 0.15);
      color: #38BDF8;
      border-color: rgba(56, 189, 248, 0.3);
    }
    .tech-header .section-title {
      color: #FFFFFF;
    }
    .tech-header .section-desc {
      color: #94A3B8;
    }
    .tech-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .tech-box {
      background: rgba(30, 41, 59, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 32px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(8px);
    }
    .tech-box h3 {
      font-size: 1.3rem;
      margin-bottom: 14px;
      color: #F8FAFC;
    }
    .tech-box p {
      font-size: 0.9375rem;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* 7. 全流程方法步骤连线 (Workflow) */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      text-align: center;
      box-shadow: var(--shadow-card);
      position: relative;
    }
    .step-badge {
      width: 44px;
      height: 44px;
      line-height: 44px;
      margin: 0 auto 18px;
      background: var(--primary);
      color: #FFFFFF;
      font-weight: 800;
      border-radius: 50%;
      font-size: 1.1rem;
    }
    .step-card h3 {
      font-size: 1.15rem;
      color: var(--text-title);
      margin-bottom: 10px;
    }
    .step-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 8. 成果统计数据条 (Metrics) */
    .metrics-bar {
      background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%);
      color: #FFFFFF;
      padding: 60px 0;
      border-radius: var(--radius-lg);
      margin: 20px auto;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-item {
      padding: 0 16px;
      border-right: 1px solid rgba(255, 255, 255, 0.12);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-val {
      font-size: 3rem;
      font-weight: 900;
      color: #38BDF8;
      line-height: 1;
      margin-bottom: 8px;
    }
    .metric-label {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 0.8125rem;
      color: #C7D2FE;
    }

    /* 9. 典型场景与合集目录 (Scenarios) */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .scenario-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }
    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .scenario-img {
      height: 160px;
      overflow: hidden;
    }
    .scenario-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .scenario-card:hover .scenario-img img {
      transform: scale(1.05);
    }
    .scenario-body {
      padding: 22px;
    }
    .scenario-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 8px;
    }
    .scenario-body p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 10. 真实客户口碑评价 (Testimonials) */
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      box-shadow: var(--shadow-card);
    }
    .testi-rating {
      color: #F59E0B;
      font-size: 1rem;
      margin-bottom: 14px;
    }
    .testi-quote {
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testi-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #EEF2F6;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 1.1rem;
    }
    .testi-meta h4 {
      font-size: 0.9375rem;
      color: var(--text-title);
    }
    .testi-meta span {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 11. 行业资讯与能效专题 (Insights) */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 28px;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-card);
    }
    .news-date {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 10px;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-desc {
      font-size: 0.875rem;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }
    .news-link {
      color: var(--primary);
      font-size: 0.875rem;
      font-weight: 600;
      align-self: flex-start;
    }

    /* 12. 常见问题解答手风琴 (FAQ) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: all 0.25s;
    }
    .faq-item details {
      width: 100%;
    }
    .faq-item summary {
      padding: 20px 24px;
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-title);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      outline: none;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: '+';
      font-size: 1.4rem;
      color: var(--primary);
      transition: transform 0.2s;
    }
    .faq-item details[open] summary::after {
      content: '−';
    }
    .faq-body {
      padding: 0 24px 22px;
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* 13. 全局收口转化行动区 (CTA Banner) */
    .cta-banner {
      background: linear-gradient(135deg, #312E81 0%, #1E1B4B 100%);
      border-radius: var(--radius-lg);
      padding: 64px 40px;
      color: #FFFFFF;
      text-align: center;
      box-shadow: 0 20px 50px rgba(49, 46, 129, 0.35);
      margin-bottom: 60px;
    }
    .cta-banner h2 {
      font-size: clamp(1.8rem, 3.5vw, 2.5rem);
      font-weight: 800;
      margin-bottom: 16px;
    }
    .cta-banner p {
      font-size: 1.0625rem;
      color: #C7D2FE;
      max-width: 680px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .cta-form {
      display: flex;
      justify-content: center;
      gap: 12px;
      max-width: 520px;
      margin: 0 auto;
    }
    .cta-input {
      flex: 1;
      padding: 14px 20px;
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.25);
      background: rgba(255, 255, 255, 0.12);
      color: #FFFFFF;
      font-size: 0.95rem;
      outline: none;
    }
    .cta-input::placeholder {
      color: #CBD5E1;
    }
    .cta-input:focus {
      border-color: #38BDF8;
      background: rgba(255, 255, 255, 0.2);
    }

    /* 页脚 */
    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.875rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h3 {
      font-size: 1.3rem;
      color: #FFFFFF;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.7;
      color: #94A3B8;
    }
    .footer-col h4 {
      font-size: 1rem;
      color: #F8FAFC;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul a:hover {
      color: #38BDF8;
    }
    .footer-contact li {
      line-height: 1.6;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      color: #64748B;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .intro-grid, .tech-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .adv-grid, .pain-grid, .tier-grid, .testi-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .tier-card.featured {
        transform: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .menu-toggle {
        display: flex;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 16px 24px rgba(0,0,0,0.08);
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
      }
      .nav-menu.open {
        display: flex;
      }
      .adv-grid, .pain-grid, .tier-grid, .testi-grid, .news-grid, .scenario-grid, .step-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 32px;
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }