/* 公号魔方官网样式 - 暗紫色主题 */

/* ========== 基础变量 ========== */
:root {
    --primary: #8b5cf6;
    --primary-light: #a78bfa;
    --primary-dark: #7c3aed;
    --bg-dark: #0d1117;
    --bg-card: #161b22;
    --bg-input: #21262d;
    --border: #30363d;
    --text: #e6edf3;
    --text-muted: #7d8590;
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;
    --gradient: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    --glow: 0 0 40px rgba(139, 92, 246, 0.3);
}

/* ========== 重置样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ========== 通用样式 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 20px;
    color: var(--primary-light);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    color: var(--text-muted);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== 按钮样式 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary-light);
}

.btn-outline:hover {
    background: rgba(139, 92, 246, 0.1);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-xl {
    padding: 18px 36px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 17, 23, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.1);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(13, 17, 23, 0.98);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
}

.logo-cube {
    font-size: 28px;
    animation: rotateCube 8s infinite linear;
}

@keyframes rotateCube {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(10deg); }
    75% { transform: rotate(-10deg); }
}

.logo-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: var(--primary-light);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-btn {
    padding: 10px 20px;
    background: var(--gradient);
    color: white;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
}

.nav-btn:hover {
    box-shadow: var(--glow);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 24px;
    cursor: pointer;
}

/* ========== 英雄区域 ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 20px 60px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-particles {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, rgba(139, 92, 246, 0.3) 50%, transparent 50%),
        radial-gradient(2px 2px at 40% 70%, rgba(139, 92, 246, 0.2) 50%, transparent 50%),
        radial-gradient(2px 2px at 60% 20%, rgba(139, 92, 246, 0.3) 50%, transparent 50%),
        radial-gradient(2px 2px at 80% 60%, rgba(139, 92, 246, 0.2) 50%, transparent 50%);
    animation: particleFloat 20s infinite linear;
}

@keyframes particleFloat {
    0% { transform: translateY(0); }
    100% { transform: translateY(-100px); }
}

.hero-content {
    flex: 1;
    max-width: 600px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 20px;
    color: var(--primary-light);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(139, 92, 246, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(139, 92, 246, 0); }
}

.hero-title {
    font-size: 52px;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 36px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-features {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 15px;
}

.hero-feature span {
    color: var(--success);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
    z-index: 1;
}

/* 模拟窗口 */
.mockup-window {
    width: 100%;
    max-width: 500px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), var(--glow);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.mockup-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-input);
    border-bottom: 1px solid var(--border);
}

.mockup-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.mockup-dot.red { background: #f85149; }
.mockup-dot.yellow { background: #d29922; }
.mockup-dot.green { background: #3fb950; }

.mockup-title {
    margin-left: auto;
    font-size: 13px;
    color: var(--text-muted);
}

.mockup-content {
    padding: 20px;
    min-height: 300px;
}

.mockup-placeholder,
.screenshot-placeholder,
.qr-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 260px;
    background: rgba(139, 92, 246, 0.05);
    border: 2px dashed rgba(139, 92, 246, 0.3);
    border-radius: 8px;
    color: var(--text-muted);
}

.mockup-placeholder span,
.screenshot-placeholder span,
.qr-placeholder span {
    font-size: 48px;
    margin-bottom: 12px;
}

.mockup-placeholder p,
.screenshot-placeholder p,
.qr-placeholder p {
    font-size: 14px;
}

/* ========== 功能特点 ========== */
.features {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-card) 100%);
}

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

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 40px rgba(139, 92, 246, 0.1);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.7;
}

/* ========== 软件截图 ========== */
.screenshots {
    padding: 100px 0;
    background: var(--bg-dark);
}

.screenshots-slider {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.screenshot-item {
    display: none;
    animation: fadeIn 0.5s ease;
}

.screenshot-item.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.screenshot-placeholder {
    min-height: 500px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
}

.screenshot-dots {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
}

.screenshot-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border);
    cursor: pointer;
    transition: all 0.3s ease;
}

.screenshot-dots .dot.active {
    background: var(--primary);
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.screenshot-dots .dot:hover {
    background: var(--primary-light);
}

/* ========== 价格方案 ========== */
.pricing {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-dark) 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 36px;
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.pricing-card.popular {
    border-color: var(--primary);
    box-shadow: 0 0 40px rgba(139, 92, 246, 0.2);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 20px;
    background: var(--gradient);
    color: white;
    font-size: 13px;
    font-weight: 600;
    border-radius: 20px;
}

.pricing-header {
    text-align: center;
    margin-bottom: 28px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--border);
}

.pricing-header h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.pricing-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.price-currency {
    font-size: 24px;
    color: var(--primary-light);
}

.price-amount {
    font-size: 56px;
    font-weight: 900;
    color: var(--primary-light);
    line-height: 1;
}

.price-period {
    font-size: 16px;
    color: var(--text-muted);
}

.price-save {
    margin-top: 8px;
    font-size: 14px;
    color: var(--success);
}

.pricing-features {
    list-style: none;
    margin-bottom: 28px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: var(--text-muted);
    font-size: 15px;
}

.pricing-features li span {
    color: var(--success);
    font-weight: bold;
}

.pricing-features li strong {
    color: var(--primary-light);
}

.pricing-features li.disabled {
    color: var(--text-muted);
    opacity: 0.6;
}

.pricing-features li.disabled span {
    color: var(--text-muted);
}

.pricing-note {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    background: rgba(139, 92, 246, 0.1);
    border-radius: 12px;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.pricing-note p {
    color: var(--text-muted);
    font-size: 15px;
    margin: 0;
}

/* ========== 常见问题 ========== */
.faq {
    padding: 100px 0;
    background: var(--bg-dark);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(139, 92, 246, 0.3);
}

.faq-item.active {
    border-color: var(--primary);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: rgba(139, 92, 246, 0.05);
}

.faq-icon {
    font-size: 24px;
    color: var(--primary);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding: 0 24px 20px;
}

.faq-answer p {
    color: var(--text-muted);
    line-height: 1.8;
}

/* ========== 下载区域 ========== */
.download {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(124, 58, 237, 0.05) 100%);
    border-top: 1px solid rgba(139, 92, 246, 0.2);
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
}

.download-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.download-info h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.download-info p {
    color: var(--text-muted);
    font-size: 18px;
    margin-bottom: 20px;
}

.download-meta {
    display: flex;
    gap: 24px;
    color: var(--text-muted);
    font-size: 14px;
}

.download-buttons {
    display: flex;
    gap: 16px;
}

.download-btn {
    position: relative;
    overflow: hidden;
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% { left: -100%; }
    50%, 100% { left: 100%; }
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.btn-main {
    font-size: 16px;
    font-weight: 700;
}

.btn-sub {
    font-size: 12px;
    opacity: 0.8;
}

.btn-icon {
    font-size: 24px;
}

/* ========== 联系我们 ========== */
.contact {
    padding: 100px 0;
    background: var(--bg-dark);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 700px;
    margin: 0 auto;
}

.contact-single {
    display: flex;
    justify-content: center;
    max-width: 400px;
    margin: 0 auto;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 36px;
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-8px);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.contact-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.contact-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.contact-card p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.6;
}

.qr-placeholder {
    min-height: 150px;
    margin-top: 16px;
}

.qr-placeholder span {
    font-size: 36px;
}

.qr-image {
    margin-top: 16px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    display: inline-block;
}

.qr-image img {
    width: 180px;
    height: 180px;
    display: block;
    border-radius: 8px;
}

/* ========== 页脚 ========== */
.footer {
    padding: 60px 0 30px;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
}

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

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text);
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 8px;
}

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
}

/* ========== 移动端菜单 ========== */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13, 17, 23, 0.98);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-content {
    text-align: center;
}

.mobile-menu-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text);
    font-size: 32px;
    cursor: pointer;
}

.mobile-menu-content a {
    display: block;
    font-size: 24px;
    font-weight: 600;
    padding: 16px;
    color: var(--text);
    transition: color 0.3s ease;
}

.mobile-menu-content a:hover {
    color: var(--primary-light);
}

.mobile-menu-content .btn {
    margin-top: 20px;
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 120px;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        margin-top: 60px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
    
    .download-content {
        flex-direction: column;
        text-align: center;
    }
    
    .download-meta {
        justify-content: center;
    }
    
    .download-buttons {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .nav-btn {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-desc {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn-lg, .btn-xl {
        width: 100%;
    }
}


/* ========== 四列定价布局 ========== */
.pricing-grid.four-cols {
    grid-template-columns: repeat(4, 1fr);
    max-width: 1200px;
}

.price-original {
    display: block;
    font-size: 16px;
    color: var(--text-muted);
    text-decoration: line-through;
    margin-bottom: 4px;
}

.pricing-card.enterprise {
    border-color: #f59e0b;
    box-shadow: 0 0 40px rgba(245, 158, 11, 0.15);
}

.enterprise-badge {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%) !important;
}

@media (max-width: 1200px) {
    .pricing-grid.four-cols {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .pricing-grid.four-cols {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}