/* roulang page: index */
:root {
            --primary-dark: #1E293B;
            --primary-teal: #0D9488;
            --primary-teal-hover: #0F766E;
            --accent-amber: #F59E0B;
            --accent-amber-hover: #D97706;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-deep: #0F172A;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --text-light: #F1F5F9;
            --border-color: rgba(226, 232, 240, 0.9);
            --border-dark: #334155;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 20px 30px -10px rgba(13, 148, 136, 0.12);
            --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

        /* 顶部导航 */
        .site-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);
        }

        .top-notice-bar {
            background: var(--primary-dark);
            color: #94A3B8;
            font-size: 13px;
            padding: 6px 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }

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

        .top-notice-inner .badge-mini {
            background: rgba(13, 148, 136, 0.2);
            color: #2DD4BF;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 500;
            margin-right: 8px;
        }

        .nav-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-dark);
        }

        .brand-logo i {
            color: var(--primary-teal);
            font-size: 24px;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 32px;
        }

        .nav-menu a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            padding: 8px 0;
            position: relative;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary-teal);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary-teal);
            border-radius: 2px;
        }

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

        /* 按钮规范 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 22px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
            white-space: nowrap;
        }

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

        .btn-teal:hover {
            background: var(--primary-teal-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(13, 148, 136, 0.25);
        }

        .btn-amber {
            background: var(--accent-amber);
            color: #FFFFFF;
        }

        .btn-amber:hover {
            background: var(--accent-amber-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(245, 158, 11, 0.3);
        }

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

        .btn-outline:hover {
            border-color: var(--primary-teal);
            color: var(--primary-teal);
            background: #F0FDFA;
        }

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

        .btn-dark:hover {
            background: #334155;
            color: #FFFFFF;
        }

        /* 统一标题体系与Section规范 */
        section {
            padding: 88px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            background: #CCFBF1;
            color: #0F766E;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .section-tag.amber {
            background: #FEF3C7;
            color: #B45309;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary-dark);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Hero 裂变邀请与学术算力奖励首屏 */
        .hero-section {
            padding: 70px 0 90px;
            background: linear-gradient(180deg, #F8FAFC 0%, #EFF6FF 100%);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .hero-banner-card {
            background: #FFFFFF;
            border: 1px solid rgba(226, 232, 240, 0.8);
            border-radius: var(--radius-lg);
            padding: 48px;
            box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.08);
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--primary-dark);
            margin-bottom: 20px;
        }

        .hero-content h1 span {
            color: var(--primary-teal);
        }

        .hero-lead-text {
            font-size: 16px;
            color: var(--text-muted);
            margin-bottom: 30px;
            line-height: 1.8;
        }

        /* 邀请任务进度槽 */
        .referral-box {
            background: #F8FAFC;
            border: 1px solid #E2E8F0;
            border-radius: var(--radius-md);
            padding: 24px;
            margin-bottom: 28px;
        }

        .referral-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 12px;
        }

        .referral-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .referral-status {
            font-size: 13px;
            color: var(--primary-teal);
            font-weight: 600;
        }

        .progress-bar-wrap {
            height: 10px;
            background: #E2E8F0;
            border-radius: 5px;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .progress-bar-fill {
            height: 100%;
            width: 65%;
            background: linear-gradient(90deg, var(--primary-teal), #2DD4BF);
            border-radius: 5px;
        }

        .referral-stages {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-graphic {
            position: relative;
        }

        .hero-img-cover {
            width: 100%;
            height: 380px;
            object-fit: cover;
            border-radius: var(--radius-md);
            box-shadow: 0 12px 24px -8px rgba(0,0,0,0.15);
        }

        .graphic-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(8px);
            color: #FFFFFF;
            padding: 16px 20px;
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.1);
            font-size: 13px;
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .graphic-badge i {
            color: var(--accent-amber);
            font-size: 24px;
        }

        /* 优惠阶梯与科研团队算力激励 */
        .tier-section {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
        }

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

        .tier-card {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            position: relative;
            transition: var(--transition);
        }

        .tier-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-teal);
        }

        .tier-level {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary-teal);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }

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

        .tier-benefit {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 16px;
        }

        .tier-benefit span {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
        }

        .tier-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
            min-height: 48px;
        }

        /* 套餐对比与学术授权配置 */
        .pricing-section {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-color);
        }

        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            align-items: stretch;
        }

        .pricing-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            position: relative;
        }

        .pricing-card.featured {
            border: 2px solid var(--primary-teal);
            box-shadow: 0 16px 32px -10px rgba(13, 148, 136, 0.15);
            transform: scale(1.02);
        }

        .pricing-badge-popular {
            position: absolute;
            top: -14px;
            right: 32px;
            background: var(--accent-amber);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 12px;
        }

        .plan-header {
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 24px;
            margin-bottom: 28px;
        }

        .plan-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }

        .plan-cost {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary-dark);
            display: flex;
            align-items: baseline;
            gap: 6px;
        }

        .plan-cost small {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .plan-features {
            list-style: none;
            flex-grow: 1;
            margin-bottom: 32px;
        }

        .plan-features li {
            font-size: 14px;
            color: var(--text-main);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .plan-features li i {
            color: var(--primary-teal);
            font-size: 14px;
        }

        /* 限时通道与研讨会抢座区 */
        .flash-access-section {
            background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
            color: #FFFFFF;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .flash-card-inner {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .flash-info h2 {
            font-size: 32px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .flash-info p {
            color: #94A3B8;
            font-size: 15px;
            margin-bottom: 24px;
            line-height: 1.8;
        }

        .countdown-container {
            display: flex;
            gap: 16px;
            margin-bottom: 32px;
        }

        .countdown-item {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 14px 20px;
            border-radius: var(--radius-md);
            text-align: center;
            min-width: 80px;
        }

        .countdown-num {
            font-size: 26px;
            font-weight: 800;
            color: var(--accent-amber);
            display: block;
        }

        .countdown-label {
            font-size: 12px;
            color: #94A3B8;
        }

        .flash-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .flash-media img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        /* 爆款科研模块清单 */
        .hot-list-section {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
        }

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

        .hot-card {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

        .hot-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: var(--primary-teal);
        }

        .hot-img-wrap {
            height: 190px;
            position: relative;
            overflow: hidden;
        }

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

        .hot-card:hover .hot-img-wrap img {
            transform: scale(1.05);
        }

        .hot-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(15, 23, 42, 0.85);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
        }

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

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

        .hot-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-grow: 1;
            line-height: 1.65;
        }

        .hot-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid rgba(226, 232, 240, 0.8);
            padding-top: 16px;
        }

        .hot-stat {
            font-size: 13px;
            color: var(--primary-teal);
            font-weight: 600;
        }

        /* 评价墙与学者信赖背书 */
        .reviews-section {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-color);
        }

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

        .review-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .review-rating {
            color: var(--accent-amber);
            font-size: 14px;
            margin-bottom: 14px;
        }

        .review-quote {
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.75;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .scholar-profile {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }

        .scholar-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #CCFBF1;
            color: var(--primary-teal);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
        }

        .scholar-name {
            font-size: 15px;
            font-weight: 700;
            color: var(--primary-dark);
        }

        .scholar-field {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 保障图标条：学术诚信与数据规范 */
        .guarantee-bar-section {
            background: #FFFFFF;
            padding: 48px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .guarantee-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: #F0FDFA;
            color: var(--primary-teal);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
        }

        .guarantee-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }

        .guarantee-content p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 科研动态与前沿方法资讯 */
        .insights-section {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-color);
        }

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

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

        .insight-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

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

        .insight-body {
            padding: 24px;
        }

        .insight-date {
            font-size: 13px;
            color: var(--primary-teal);
            font-weight: 600;
            margin-bottom: 8px;
        }

        .insight-heading {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.45;
            margin-bottom: 12px;
        }

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

        /* 扩展板块 1：核心技术架构解析 */
        .tech-arch-section {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
        }

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

        .tech-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 16px 32px -12px rgba(0,0,0,0.1);
        }

        .tech-points {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .tech-point-item {
            display: flex;
            gap: 16px;
        }

        .tech-point-item i {
            color: var(--primary-teal);
            font-size: 20px;
            margin-top: 4px;
        }

        .tech-point-item h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }

        .tech-point-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 扩展板块 2：多学科真实场景落地矩阵 */
        .discipline-section {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-color);
        }

        .discipline-tabs {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .discipline-box {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            transition: var(--transition);
        }

        .discipline-box:hover {
            border-color: var(--primary-teal);
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
        }

        .discipline-icon {
            font-size: 32px;
            color: var(--primary-teal);
            margin-bottom: 14px;
        }

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

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

        /* 扩展板块 3：典型科研全流程工作链路 */
        .workflow-section {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
        }

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

        .workflow-step {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
        }

        .step-index {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary-teal);
            color: #FFFFFF;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            margin-bottom: 16px;
        }

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

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

        /* 加购与统一接入引导区 */
        .cta-section {
            background: linear-gradient(135deg, #0F172A 0%, #134E4A 100%);
            color: #FFFFFF;
            padding: 80px 0;
            text-align: center;
        }

        .cta-box {
            max-width: 800px;
            margin: 0 auto;
        }

        .cta-box h2 {
            font-size: 36px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 18px;
        }

        .cta-box p {
            font-size: 16px;
            color: #CCFBF1;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* 页脚规范 */
        .site-footer {
            background: var(--bg-deep);
            color: #94A3B8;
            padding: 70px 0 30px;
            font-size: 14px;
            border-top: 1px solid var(--border-dark);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 50px;
        }

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: #64748B;
            margin-bottom: 20px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .footer-col ul li a {
            color: #94A3B8;
        }

        .footer-col ul li a:hover {
            color: #2DD4BF;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: #64748B;
        }

        .footer-bottom a {
            color: #64748B;
        }

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

        /* 移动端与平板响应式适配 */
        @media (max-width: 1024px) {
            .hero-banner-card {
                grid-template-columns: 1fr;
                padding: 32px;
            }
            .hero-img-cover {
                height: 300px;
            }
            .tier-grid,
            .pricing-grid,
            .hot-grid,
            .reviews-grid,
            .insights-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-grid,
            .discipline-tabs,
            .workflow-timeline {
                grid-template-columns: repeat(2, 1fr);
            }
            .tech-layout,
            .flash-card-inner {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
            .tier-grid,
            .pricing-grid,
            .hot-grid,
            .reviews-grid,
            .insights-grid,
            .guarantee-grid,
            .discipline-tabs,
            .workflow-timeline {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            .countdown-container {
                justify-content: center;
            }
        }