:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --secondary-color: #6366F1;
    --text-color: #1F2937;
    --text-light: #6B7280;
    --bg-color: #F9FAFB;
    --white: #FFFFFF;
    --success: #10B981;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 8px;
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

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

.btn-white:hover {
    background-color: #F3F4F6;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* 导航栏 */
.navbar {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    padding: 0.8rem 0;
    box-shadow: var(--shadow-md);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-light);
    font-weight: 500;
}

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

.nav-actions {
    display: flex;
    gap: 1rem;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--text-color);
    cursor: pointer;
}

/* Hero 区域 */
.hero {
    padding-top: 8rem;
    padding-bottom: 5rem;
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    z-index: 2;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.highlight {
    color: var(--primary-color);
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 8px;
    background-color: rgba(79, 70, 229, 0.2);
    z-index: -1;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-btns {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-btns i {
    margin-left: 0.5rem;
    transition: transform 0.3s ease;
}

.hero-btns .btn:hover i {
    transform: translateX(4px);
}

.stats {
    display: flex;
    gap: 3rem;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding-top: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
}

.stat-label {
    color: var(--text-light);
    font-size: 0.875rem;
}

.hero-image {
    flex: 1;
    position: relative;
    height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 模拟卡片堆叠效果 */
.card-stack {
    position: relative;
    width: 320px;
    height: 400px;
}

.card {
    position: absolute;
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    height: 100%;
    padding: 20px;
    transition: all 0.5s ease;
    border: 1px solid rgba(0,0,0,0.05);
}

.card-1 {
    z-index: 3;
    transform: rotate(-3deg) translateY(0);
}

.card-2 {
    z-index: 2;
    transform: rotate(2deg) translate(15px, 15px);
    opacity: 0.9;
}

.card-3 {
    z-index: 1;
    transform: rotate(-5deg) translate(-10px, 30px);
    opacity: 0.8;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--success);
}

.card-stack:hover .card-1 {
    transform: rotate(0) translateY(-20px);
}
.card-stack:hover .card-2 {
    transform: rotate(5deg) translate(30px, 20px);
}
.card-stack:hover .card-3 {
    transform: rotate(-8deg) translate(-20px, 40px);
}

.card-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #E5E7EB;
    margin-right: 15px;
}

.line {
    height: 12px;
    background-color: #F3F4F6;
    border-radius: 6px;
    margin-bottom: 15px;
    width: 100%;
}

.line.short {
    width: 60%;
    margin-bottom: 0;
}

.success-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.floating-badge {
    position: absolute;
    background: var(--white);
    padding: 10px 20px;
    border-radius: 50px;
    box-shadow: var(--shadow-md);
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 4;
    animation: float 3s ease-in-out infinite;
}

.floating-badge i {
    color: var(--primary-color);
}

.badge-1 {
    top: 20%;
    left: -20px;
    animation-delay: 0s;
}

.badge-2 {
    bottom: 20%;
    right: -20px;
    animation-delay: 1.5s;
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0); }
}

/* 平台支持区域 */
.platforms {
    padding: 6rem 0;
    background-color: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.25rem;
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.platform-card {
    background-color: var(--bg-color);
    padding: 2.5rem;
    border-radius: 1rem;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.platform-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(79, 70, 229, 0.1);
    background-color: var(--white);
}

.icon-box {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.icon-box.wechat {
    background-color: rgba(7, 193, 96, 0.1);
    color: #07C160;
}

.icon-box.web {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
}

.icon-box.app {
    background-color: rgba(245, 158, 11, 0.1);
    color: #F59E0B;
}

.platform-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.platform-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.link-text {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.link-text:hover {
    gap: 8px;
}

.badge-coming-soon {
    display: inline-block;
    padding: 4px 12px;
    background-color: #F3F4F6;
    color: var(--text-light);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* 功能特点区域 */
.features {
    padding: 6rem 0;
    background-color: #F8FAFC;
}

.feature-container {
    display: flex;
    align-items: center;
    gap: 5rem;
}

.feature-image {
    flex: 1;
}

.mockup-window {
    background-color: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid rgba(0,0,0,0.05);
}

.mockup-header {
    background-color: #F1F5F9;
    padding: 12px 16px;
    display: flex;
    gap: 8px;
    border-bottom: 1px solid #E2E8F0;
}

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

.dot.red { background-color: #EF4444; }
.dot.yellow { background-color: #F59E0B; }
.dot.green { background-color: #10B981; }

.mockup-content {
    padding: 20px;
}

.data-row {
    display: flex;
    justify-content: space-between;
    padding: 12px;
    border-bottom: 1px solid #F1F5F9;
    align-items: center;
}

.data-row.header {
    font-weight: 700;
    color: var(--text-color);
    background-color: #F8FAFC;
    border-radius: 6px;
    border-bottom: none;
    margin-bottom: 10px;
}

.status {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status.active {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10B981;
}

.status.done {
    background-color: rgba(107, 114, 128, 0.1);
    color: #6B7280;
}

.feature-text {
    flex: 1;
}

.feature-text h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.feature-list li {
    display: flex;
    gap: 1.5rem;
}

.feature-list i {
    font-size: 1.5rem;
    color: var(--primary-color);
    background-color: rgba(79, 70, 229, 0.1);
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-list h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.feature-list p {
    color: var(--text-light);
}

/* CTA */
.cta {
    background-color: var(--primary-color);
    padding: 5rem 0;
    text-align: center;
    color: var(--white);
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

/* Footer */
.footer {
    background-color: #111827;
    color: #D1D5DB;
    padding-top: 5rem;
    padding-bottom: 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-brand p {
    margin-bottom: 1.5rem;
    max-width: 300px;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: #9CA3AF;
    font-size: 1.25rem;
}

.social-links a:hover {
    color: var(--white);
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer-col ul li {
    margin-bottom: 0.8rem;
}

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

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
    font-size: 0.875rem;
    color: #9CA3AF;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-container, .feature-container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-image {
        width: 100%;
        margin-top: 2rem;
    }

    .hero-btns {
        justify-content: center;
    }
    
    .stats {
        justify-content: center;
    }
    
    .feature-list li {
        text-align: left;
    }
}

@media (max-width: 768px) {
    .nav-links, .nav-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
}