/* roulang page: index */
:root {
      --primary: #059669;
      --primary-hover: #047857;
      --primary-light: #ecfdf5;
      --accent: #f97316;
      --accent-hover: #ea580c;
      --secondary: #2563eb;
      --dark: #0f172a;
      --dark-card: #1e293b;
      --text: #0f172a;
      --text-muted: #475569;
      --text-light: #94a3b8;
      --bg: #ffffff;
      --bg-alt: #f8fafc;
      --border: #e2e8f0;
      --border-dark: #334155;
      --radius: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
      --shadow-lg: 0 12px 24px -4px rgba(15, 23, 42, 0.08);
      --container-max: 1200px;
      --transition: all 0.2s ease-out;
    }

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

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text);
      background-color: var(--bg);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 clamp(16px, 4vw, 32px);
    }

    /* 顶部信息条 */
    .top-bar {
      background-color: var(--dark);
      color: #cbd5e1;
      font-size: 0.8125rem;
      border-bottom: 1px solid var(--border-dark);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 38px;
    }
    .top-status {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10b981;
      box-shadow: 0 0 6px #10b981;
    }
    .top-links {
      display: flex;
      gap: 20px;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text);
    }
    .brand-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), #047857);
      color: #fff;
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.15rem;
      font-weight: 800;
      box-shadow: 0 2px 8px rgba(5, 150, 105, 0.3);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      white-space: nowrap;
      min-height: 44px;
    }
    .btn-primary {
      background-color: var(--accent);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.28);
    }
    .btn-primary:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
    }
    .btn-secondary {
      background-color: var(--primary);
      color: #ffffff;
    }
    .btn-secondary:hover {
      background-color: var(--primary-hover);
    }
    .btn-outline {
      border-color: #cbd5e1;
      color: var(--text);
      background: transparent;
    }
    .btn-outline:hover {
      border-color: var(--text);
      background: #f1f5f9;
    }
    .btn-ghost-white {
      border-color: rgba(255, 255, 255, 0.4);
      color: #ffffff;
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(4px);
    }
    .btn-ghost-white:hover {
      background: rgba(255, 255, 255, 0.2);
      border-color: #ffffff;
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text);
      padding: 8px;
    }

    /* 板块通用 */
    .section {
      padding: 88px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-alt);
    }
    .section-dark {
      background-color: var(--dark);
      color: #f8fafc;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 56px;
    }
    .badge-sub {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--primary);
      background-color: var(--primary-light);
      border-radius: 999px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-dark .badge-sub {
      background: rgba(5, 150, 105, 0.2);
      color: #34d399;
      border: 1px solid rgba(52, 211, 153, 0.3);
    }
    .section-title {
      font-size: clamp(1.75rem, 2.8vw, 2.25rem);
      font-weight: 700;
      line-height: 1.35;
      color: inherit;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: var(--text-light);
    }

    /* 板块1：Hero（视频官网样式，带遮罩与播放交互） */
    .hero-section {
      position: relative;
      background: url('/assets/images/56c59428471c18cc.jpg') center/cover no-repeat;
      min-height: 640px;
      display: flex;
      align-items: center;
      color: #ffffff;
      padding: 110px 0;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(5, 150, 105, 0.82) 100%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 940px;
      margin: 0 auto;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.25);
      padding: 6px 18px;
      border-radius: 999px;
      font-size: 0.875rem;
      margin-bottom: 24px;
      backdrop-filter: blur(4px);
    }
    .hero-title {
      font-size: clamp(2.2rem, 4.5vw, 3.25rem);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-intro {
      font-size: clamp(1rem, 1.3vw, 1.1875rem);
      line-height: 1.75;
      color: #e2e8f0;
      margin-bottom: 36px;
      text-align: justify;
      text-align-last: center;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
    }
    .video-play-btn {
      width: 58px;
      height: 58px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 0 8px rgba(255, 255, 255, 0.2);
      transition: var(--transition);
      cursor: pointer;
      font-size: 1.3rem;
    }
    .video-play-btn:hover {
      transform: scale(1.08);
      box-shadow: 0 0 0 12px rgba(255, 255, 255, 0.3);
    }

    /* 板块2：指标量化条 */
    .metrics-bar {
      margin-top: -45px;
      position: relative;
      z-index: 10;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      background: #ffffff;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border);
      overflow: hidden;
    }
    .metric-item {
      padding: 28px 24px;
      border-right: 1px solid var(--border);
      text-align: center;
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-val {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 6px;
    }
    .metric-title {
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 4px;
    }
    .metric-desc {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块3：问题陈述（行业痛点拆解） */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .pain-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      transition: var(--transition);
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #cbd5e1;
    }
    .pain-tag {
      color: #ef4444;
      font-size: 0.8125rem;
      font-weight: 700;
      background: #fef2f2;
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 14px;
    }
    .pain-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text);
    }
    .pain-desc {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块4：操作演示（教务排课与考勤消课流程） */
    .workflow-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px 20px;
      position: relative;
      transition: var(--transition);
    }
    .step-card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .step-number {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }
    .step-title {
      font-size: 1.125rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .step-text {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块5：核心功能矩阵（卖点三连及深层扩展） */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      transition: var(--transition);
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #a7f3d0;
    }
    .feature-icon-box {
      width: 52px;
      height: 52px;
      border-radius: var(--radius);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      font-weight: 800;
      margin-bottom: 18px;
    }
    .feature-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .feature-desc {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块6：场景演示（多运动门类解决方案） */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .scenario-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .scenario-img-wrap {
      height: 200px;
      overflow: hidden;
      background: #e2e8f0;
    }
    .scenario-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .scenario-card:hover .scenario-img-wrap img {
      transform: scale(1.05);
    }
    .scenario-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .scenario-tag {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--secondary);
      background: #eff6ff;
      padding: 3px 8px;
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 10px;
    }
    .scenario-title {
      font-size: 1.1875rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .scenario-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .scenario-list {
      list-style: none;
      font-size: 0.8125rem;
      color: var(--text);
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-top: auto;
    }
    .scenario-list li::before {
      content: "✔";
      color: var(--primary);
      margin-right: 6px;
      font-weight: bold;
    }

    /* 板块7：深色理念与预付费合规底层架构 */
    .arch-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .arch-specs {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .arch-item {
      background: var(--dark-card);
      border: 1px solid var(--border-dark);
      padding: 20px;
      border-radius: var(--radius);
    }
    .arch-item-title {
      font-size: 1.0625rem;
      font-weight: 700;
      color: #34d399;
      margin-bottom: 8px;
    }
    .arch-item-desc {
      font-size: 0.875rem;
      color: #94a3b8;
      line-height: 1.6;
    }
    .arch-media {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-dark);
      box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
    }

    /* 板块8：结果预览与标杆改造实证 */
    .case-card-lg {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      display: grid;
      grid-template-columns: 420px 1fr;
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .case-img {
      height: 100%;
      min-height: 380px;
    }
    .case-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-info {
      padding: 40px 36px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .case-client {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text);
    }
    .case-text {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .case-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 20px;
      border-top: 1px solid var(--border);
    }
    .case-stat-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
    }
    .case-stat-label {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块9：对比差异（系统 VS 传统手工方式） */
    .compare-table-wrapper {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9375rem;
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border);
    }
    .compare-table th {
      background-color: #f8fafc;
      font-weight: 700;
      color: var(--text);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .col-sys {
      background-color: #f0fdf4;
      font-weight: 600;
      color: var(--primary);
    }
    .status-bad {
      color: #ef4444;
      font-weight: 500;
    }

    /* 板块10：社会认同（机构真实口碑） */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-quote {
      font-size: 0.9375rem;
      color: var(--text);
      line-height: 1.65;
      margin-bottom: 20px;
      position: relative;
    }
    .review-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 14px;
      border-top: 1px solid #f1f5f9;
    }
    .review-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--text-muted);
    }
    .review-author {
      font-size: 0.875rem;
      font-weight: 700;
    }
    .review-role {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 板块11：资讯证据（教培运营前沿干货） */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }
    .news-meta-date {      font-size: 0.8125rem;
      color: var(--text-light);
      margin-bottom: 10px;
    }
    .news-title {
      font-size: 1.125rem;
      font-weight: 700;
      line-height: 1.45;
      margin-bottom: 12px;
      color: var(--text);
    }
    .news-summary {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex: 1;
    }
    .news-action {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块12：异议拆解（FAQ 手风琴折叠） */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      border: 1px solid var(--border);
      border-radius: var(--radius);
      background: #ffffff;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item details {
      width: 100%;
    }
    .faq-item summary {
      padding: 20px 24px;
      font-size: 1.0625rem;
      font-weight: 600;
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      color: var(--text);
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--text-muted);
      transition: transform 0.2s ease;
    }
    .faq-item details[open] summary::after {
      content: "−";
      color: var(--primary);
    }
    .faq-item details[open] summary {
      color: var(--primary);
      border-bottom: 1px solid #f1f5f9;
    }
    .faq-body {
      padding: 20px 24px;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      background: #fafafa;
    }

    /* 板块13：终极转化行动条与保障条 */
    .cta-card {
      background: linear-gradient(135deg, var(--dark) 0%, #1e293b 100%);
      border-radius: var(--radius-lg);
      padding: 56px clamp(20px, 4vw, 48px);
      color: #ffffff;
      box-shadow: var(--shadow-lg);
      text-align: center;
    }
    .cta-title {
      font-size: clamp(1.75rem, 3vw, 2.25rem);
      font-weight: 800;
      margin-bottom: 16px;
    }
    .cta-desc {
      font-size: 1rem;
      color: #94a3b8;
      max-width: 680px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .cta-form {
      display: flex;
      gap: 12px;
      max-width: 600px;
      margin: 0 auto 36px;
      flex-wrap: wrap;
    }
    .cta-form select, .cta-form input {
      padding: 12px 16px;
      border-radius: var(--radius);
      border: 1px solid var(--border-dark);
      background: rgba(255, 255, 255, 0.08);
      color: #ffffff;
      outline: none;
      flex: 1;
      min-width: 180px;
      height: 48px;
    }
    .cta-form select option {
      background: var(--dark);
      color: #ffffff;
    }
    .cta-form input::placeholder {
      color: #64748b;
    }
    .cta-form button {
      height: 48px;
      padding: 0 28px;
      font-size: 1rem;
    }
    .guarantee-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      padding-top: 32px;
      border-top: 1px solid var(--border-dark);
      text-align: left;
    }
    .guarantee-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }
    .guarantee-icon {
      font-size: 1.25rem;
      color: #34d399;
      line-height: 1;
    }
    .guarantee-text h4 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: #f1f5f9;
      margin-bottom: 4px;
    }
    .guarantee-text p {
      font-size: 0.8125rem;
      color: #64748b;
      line-height: 1.4;
    }

    /* 页脚 Footer */
    .site-footer {
      background: #090d16;
      color: #94a3b8;
      padding: 64px 0 32px;
      font-size: 0.875rem;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-brand p {
      line-height: 1.7;
      color: #64748b;
      margin-bottom: 16px;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-contact-item {
      margin-bottom: 12px;
      line-height: 1.5;
    }
    .footer-bottom {
      padding-top: 28px;
      border-top: 1px solid #1e293b;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
      color: #475569;
    }
    .footer-legal {
      display: flex;
      gap: 20px;
    }

    /* 移动端响应式断点 */
    @media (max-width: 1024px) {
      .pain-grid, .feature-grid, .scenario-grid, .reviews-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .metric-item:nth-child(1), .metric-item:nth-child(2) {
        border-bottom: 1px solid var(--border);
      }
      .case-card-lg {
        grid-template-columns: 1fr;
      }
      .case-img {
        min-height: 260px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .guarantee-row {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 24px clamp(16px, 4vw, 32px);
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border);
        display: none;
        gap: 16px;
      }
      .nav-menu.is-active {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .nav-cta {
        display: none;
      }
      .pain-grid, .feature-grid, .scenario-grid, .reviews-grid, .news-grid, .workflow-timeline {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid var(--border);
      }
      .metric-item:last-child {
        border-bottom: none;
      }
      .arch-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .guarantee-row {
        grid-template-columns: 1fr;
      }
      .cta-form {
        flex-direction: column;
      }
      .cta-form select, .cta-form input, .cta-form button {
        width: 100%;
      }
    }