/* roulang page: index */
:root {
      --primary: #0A4D68;
      --accent: #088395;
      --cyan-bright: #05BFDB;
      --mint: #00FFCA;
      --dark-navy: #0B132B;
      --navy-card: #1C2541;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --card-radius: 14px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      --shadow-sm: 0 4px 20px -2px rgba(10, 77, 104, 0.06);
      --shadow-hover: 0 14px 30px -4px rgba(10, 77, 104, 0.15);
    }

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
    }

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

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

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

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

    .section-pad {
      padding: 90px 0;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 56px auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--accent);
      background: rgba(8, 131, 149, 0.08);
      border: 1px solid rgba(8, 131, 149, 0.2);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 14px;
      letter-spacing: 0.04em;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.35;
      color: var(--primary);
      margin-bottom: 18px;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      min-height: 46px;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
    }

    .btn-primary:hover {
      background: var(--accent);
      box-shadow: 0 8px 20px rgba(10, 77, 104, 0.25);
    }

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

    .btn-outline:hover {
      background: rgba(8, 131, 149, 0.06);
    }

    /* Top Utility Bar */
    .top-bar {
      background: #06283D;
      color: #94A3B8;
      font-size: 13px;
      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;
    }

    .top-info span {
      margin-right: 20px;
    }

    /* Main Sticky Nav */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 14px rgba(10, 77, 104, 0.05);
      border-bottom: 1px solid var(--border-color);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }

    .brand-logo {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 10px;
      letter-spacing: -0.01em;
    }

    .brand-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--cyan-bright));
      border-radius: 8px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 16px;
      font-weight: bold;
    }

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

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
    }

    .nav-link:hover {
      color: var(--accent);
    }

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

    /* 移动端菜单按钮 */
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
    }

    /* 板块 1: Hero 卡片堆叠 */
    #hero {
      position: relative;
      background: #0A4D68;
      background-image: linear-gradient(135deg, rgba(6, 40, 61, 0.92), rgba(10, 77, 104, 0.88)), url('/assets/images/fedc8b4856fa4af5.webp');
      background-size: cover;
      background-position: center;
      color: #fff;
      padding: 100px 0 120px 0;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(5, 191, 219, 0.15);
      border: 1px solid var(--cyan-bright);
      color: var(--mint);
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #FFFFFF;
      letter-spacing: -0.01em;
    }

    .hero-desc {
      font-size: 16px;
      line-height: 1.85;
      color: #CFE4EC;
      margin-bottom: 36px;
    }

    .hero-btn-group {
      display: flex;
      gap: 16px;
      margin-bottom: 30px;
    }

    .btn-hero-primary {
      background: var(--cyan-bright);
      color: #06283D;
      font-weight: 700;
    }

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

    .btn-hero-secondary {
      border: 1px solid rgba(255, 255, 255, 0.4);
      color: #FFFFFF;
      backdrop-filter: blur(4px);
    }

    .btn-hero-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
    }

    /* 卡片堆叠视觉 */
    .stack-container {
      position: relative;
      perspective: 1000px;
      min-height: 380px;
    }

    .stack-card {
      position: absolute;
      width: 90%;
      background: #FFFFFF;
      border-radius: var(--card-radius);
      padding: 24px;
      color: var(--text-main);
      box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
      border: 1px solid rgba(255, 255, 255, 0.3);
      transition: var(--transition);
    }

    .card-back {
      top: -24px;
      right: 0;
      transform: scale(0.92) rotate(3deg);
      opacity: 0.65;
      background: #E8F4F8;
      z-index: 1;
    }

    .card-mid {
      top: -10px;
      right: 15px;
      transform: scale(0.96) rotate(-2deg);
      opacity: 0.85;
      background: #F1F9FC;
      z-index: 2;
    }

    .card-main {
      top: 15px;
      left: 10px;
      z-index: 3;
      background: #FFFFFF;
    }

    .stream-header {
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid #EEF2F6;
      padding-bottom: 12px;
      margin-bottom: 14px;
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 600;
    }

    .stream-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 10px 0;
      border-bottom: 1px dashed #F1F5F9;
      font-size: 14px;
    }

    .stream-tag {
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 4px;
      background: #E0F2FE;
      color: #0369A1;
      font-weight: 600;
    }

    /* 板块 2: 适用人群 */
    #audience {
      background: #FFFFFF;
    }

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

    .audience-card {
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 30px 24px;
      transition: var(--transition);
    }

    .audience-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--cyan-bright);
    }

    .aud-role {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }

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

    /* 板块 3: 谁适合 / 谁不适合 对比 */
    #fit-contrast {
      background: #F8FAFC;
    }

    .contrast-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .fit-box {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      padding: 36px;
      border-top: 4px solid #10B981;
      box-shadow: var(--shadow-sm);
    }

    .unfit-box {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      padding: 36px;
      border-top: 4px solid #EF4444;
      box-shadow: var(--shadow-sm);
    }

    .box-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .fit-title { color: #047857; }
    .unfit-title { color: #B91C1C; }

    .fit-list {
      list-style: none;
    }

    .fit-list li {
      position: relative;
      padding-left: 24px;
      margin-bottom: 14px;
      font-size: 15px;
      color: var(--text-main);
    }

    .fit-list li::before {
      position: absolute;
      left: 0;
      font-weight: bold;
    }

    .fit-box .fit-list li::before { content: "✓"; color: #10B981; }
    .unfit-box .fit-list li::before { content: "✕"; color: #EF4444; }

    /* 板块 4: 优惠券墙 */
    #coupons {
      background: #FFFFFF;
    }

    .coupon-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 28px;
    }

    .coupon-card {
      background: linear-gradient(135deg, #F0F9FF, #E0F2FE);
      border: 1px dashed var(--accent);
      border-radius: var(--card-radius);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .coupon-val {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .coupon-val span {
      font-size: 16px;
      font-weight: normal;
    }

    .coupon-name {
      font-size: 16px;
      font-weight: 700;
      color: #0369A1;
      margin-bottom: 8px;
    }

    .coupon-rule {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 18px;
      line-height: 1.6;
    }

    .coupon-btn {
      width: 100%;
      background: var(--primary);
      color: #fff;
      font-size: 14px;
      padding: 10px;
      border-radius: 6px;
      border: none;
      cursor: pointer;
      font-weight: 600;
      transition: var(--transition);
    }

    .coupon-btn:hover {
      background: var(--accent);
    }

    /* 板块 5: 架构与技术底座 */
    #architecture {
      background: #F8FAFC;
    }

    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .arch-img-wrap {
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .arch-step-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .arch-step {
      background: #FFFFFF;
      padding: 20px 24px;
      border-radius: 10px;
      border: 1px solid var(--border-color);
    }

    .arch-step h4 {
      font-size: 17px;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .arch-step p {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 板块 6: 卖点三连 */
    #features {
      background: #FFFFFF;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .feature-box {
      background: var(--bg-light);
      border-radius: var(--card-radius);
      padding: 36px 28px;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

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

    .feature-icon-wrap {
      width: 48px;
      height: 48px;
      background: rgba(8, 131, 149, 0.12);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 20px;
      margin-bottom: 20px;
      font-weight: bold;
    }

    .feature-box h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }

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

    /* 板块 7: 匹配方案与产品矩阵 */
    #products {
      background: #F8FAFC;
    }

    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .prod-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
      position: relative;
    }

    .prod-card.featured {
      border: 2px solid var(--accent);
      box-shadow: var(--shadow-hover);
    }

    .prod-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--accent);
      color: #fff;
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 20px;
    }

    .prod-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .prod-intro {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
      min-height: 48px;
    }

    .prod-specs {
      list-style: none;
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      margin-bottom: 28px;
    }

    .prod-specs li {
      font-size: 14px;
      color: var(--text-main);
      padding: 8px 0;
      border-bottom: 1px dashed #F1F5F9;
    }

    /* 板块 8: 场景演示与深色理念区 */
    #deep-tech {
      background: var(--dark-navy);
      color: #FFFFFF;
    }

    #deep-tech .section-title {
      color: #FFFFFF;
    }

    #deep-tech .section-desc {
      color: var(--text-light);
    }

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

    .node-box {
      background: var(--navy-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--card-radius);
      padding: 28px 22px;
      transition: var(--transition);
    }

    .node-box:hover {
      border-color: var(--cyan-bright);
      box-shadow: 0 8px 24px rgba(5, 191, 219, 0.15);
    }

    .node-idx {
      font-size: 13px;
      font-weight: 700;
      color: var(--cyan-bright);
      letter-spacing: 0.05em;
      margin-bottom: 12px;
    }

    .node-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #FFFFFF;
    }

    .node-desc {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* 板块 9: 关键性能数据条 */
    #metrics {
      background: #0A4D68;
      color: #FFFFFF;
      padding: 60px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }

    .metric-item h2 {
      font-size: 40px;
      font-weight: 800;
      color: var(--mint);
      margin-bottom: 6px;
      letter-spacing: -0.02em;
    }

    .metric-item p {
      font-size: 15px;
      color: #CFE4EC;
    }

    /* 板块 10: 入口分流与热门专题 */
    #entry-matrix {
      background: #FFFFFF;
    }

    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .matrix-item:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }

    .matrix-thumb {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }

    .matrix-content {
      padding: 24px;
    }

    .matrix-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .matrix-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.65;
    }

    .matrix-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块 11: 资讯与产研动态 */
    #news {
      background: #F8FAFC;
    }

    .news-wrapper {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 32px;
    }

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

    .news-main-img {
      height: 250px;
      width: 100%;
      object-fit: cover;
    }

    .news-main-body {
      padding: 30px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .news-date {
      font-size: 13px;
      color: var(--text-light);
      margin-bottom: 8px;
    }

    .news-main-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 14px;
    }

    .news-main-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .news-sub-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .news-sub-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 20px;
      transition: var(--transition);
    }

    .news-sub-item:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-sm);
    }

    .news-sub-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

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

    /* 板块 12: 保障说明与合规体系 */
    #guarantee {
      background: #FFFFFF;
    }

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

    .guarantee-box {
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px 20px;
      text-align: center;
      background: var(--bg-light);
    }

    .guarantee-icon {
      font-size: 28px;
      color: var(--accent);
      margin-bottom: 14px;
    }

    .guarantee-box h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }

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

    /* 板块 13: 转化收口与表单 */
    #cta {
      background: linear-gradient(135deg, #0A4D68 0%, #06283D 100%);
      color: #FFFFFF;
      padding: 80px 0;
    }

    .cta-box {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }

    .cta-box h2 {
      font-size: 34px;
      font-weight: 800;
      margin-bottom: 16px;
      color: #FFFFFF;
    }

    .cta-box p {
      font-size: 16px;
      color: #CFE4EC;
      margin-bottom: 36px;
      line-height: 1.8;
    }

    .cta-form {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr auto;
      gap: 12px;
      background: rgba(255, 255, 255, 0.08);
      padding: 16px;
      border-radius: 12px;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    .cta-input, .cta-select {
      background: #FFFFFF;
      border: 1px solid transparent;
      padding: 12px 16px;
      border-radius: 6px;
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      width: 100%;
    }

    .cta-submit {
      background: var(--cyan-bright);
      color: #06283D;
      font-weight: 700;
      border: none;
      padding: 0 28px;
      border-radius: 6px;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
    }

    .cta-submit:hover {
      background: var(--mint);
    }

    /* 底部固定转化条 (Sticky Bar) */
    .sticky-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #0B132B;
      color: #FFFFFF;
      z-index: 999;
      box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.2);
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 12px 0;
      transform: translateY(100%);
      transition: transform 0.3s ease-in-out;
    }

    .sticky-bar.visible {
      transform: translateY(0);
    }

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

    .sticky-info {
      font-size: 15px;
      font-weight: 600;
    }

    .sticky-info span {
      color: var(--mint);
    }

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

    /* Footer */
    footer {
      background: #06283D;
      color: #94A3B8;
      padding: 70px 0 30px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
    }

    .footer-col p {
      line-height: 1.8;
      margin-bottom: 12px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a:hover {
      color: var(--cyan-bright);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .audience-grid, .tech-node-grid, .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .stack-container {
        display: none;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
      }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .nav-menu { display: none; }
      .mobile-toggle { display: block; }
      
      .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 74px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }

      .hero-title { font-size: 32px; }
      .section-title { font-size: 26px; }
      .contrast-wrapper, .arch-grid, .news-wrapper { grid-template-columns: 1fr; }
      .features-grid, .products-grid, .coupon-grid, .matrix-grid { grid-template-columns: 1fr; }
      
      .cta-form {
        grid-template-columns: 1fr;
      }
      
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      
      .sticky-info {
        font-size: 13px;
      }
      .sticky-actions .btn {
        padding: 8px 16px;
        font-size: 13px;
      }
    }