/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 颜色系统 */
    --primary-bg: #0a0e27;
    --secondary-bg: #1a1f3a;
    --card-bg: rgba(26, 31, 58, 0.8);
    --text-primary: #ffffff;
    --text-secondary: #b8c5e0;
    --accent-purple: #a855f7;
    --accent-blue: #3b82f6;
    --accent-pink: #ec4899;
    --gradient-primary: linear-gradient(135deg, #a855f7 0%, #3b82f6 100%);
    --gradient-secondary: linear-gradient(135deg, #ec4899 0%, #a855f7 100%);
    --border-color: rgba(168, 85, 247, 0.2);

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* 字体 */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 渐变文字 */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(168, 85, 247, 0.1);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 14, 39, 0.95);
    box-shadow: 0 4px 30px rgba(168, 85, 247, 0.2);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-menu a:hover {
    color: var(--text-primary);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ==================== 按钮样式 ==================== */
.cta-button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.download-btn {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.6);
}

.download-btn-large {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.download-btn-large:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.6);
}

.download-icon {
    font-size: 1.2em;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

.cta-button.primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.4);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(168, 85, 247, 0.6);
}

.cta-button.secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--accent-purple);
}

.cta-button.secondary:hover {
    background: rgba(168, 85, 247, 0.1);
    transform: translateY(-2px);
}

.cta-button.outline {
    background: transparent;
    color: var(--accent-purple);
    border: 2px solid var(--accent-purple);
}

.cta-button.outline:hover {
    background: var(--accent-purple);
    color: white;
}

.cta-button.large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.cta-button.full-width {
    width: 100%;
}

.nav-cta {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* ==================== 英雄区 ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--gradient-primary);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--gradient-secondary);
    bottom: -100px;
    left: -100px;
    animation-delay: 5s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #3b82f6 0%, #a855f7 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.product-showcase {
    position: relative;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 通用区块样式 ==================== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ==================== 核心功能区 ==================== */
.features {
    background: var(--secondary-bg);
}

.hero-screenshot {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(168, 85, 247, 0.3);
    border: 2px solid var(--border-color);
    animation: fadeInUp 1s ease-out;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: var(--spacing-md);
    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-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.3);
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.feature-icon svg {
    width: 30px;
    height: 30px;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ==================== 产品展示区 ==================== */
.product-showcase-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
}

.showcase-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.showcase-image {
    position: relative;
}

.showcase-screenshot {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(168, 85, 247, 0.3);
    border: 2px solid var(--border-color);
    transition: transform 0.3s ease;
}

.showcase-screenshot:hover {
    transform: scale(1.02);
}

.showcase-text {
    padding: var(--spacing-md);
}

.showcase-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.showcase-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.showcase-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.showcase-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 1.125rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.showcase-features li::before {
    content: '✓';
    color: var(--accent-purple);
    font-weight: 700;
}

/* ==================== 视频演示区 ==================== */
.video-demo-section {
    padding: var(--spacing-xl) 0;
    background: var(--secondary-bg);
}

.video-container {
    position: relative;
    max-width: 1000px;
    margin: 0 auto var(--spacing-md);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(168, 85, 247, 0.3);
    border: 2px solid var(--border-color);
}

.demo-video {
    width: 100%;
    min-height: 500px;
    height: auto;
    display: block;
    background: #000;
    object-fit: contain;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.3s ease;
}

.video-overlay:hover {
    background: rgba(0, 0, 0, 0.4);
}

.play-button {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.5);
}

.play-button:hover {
    transform: scale(1.1);
    box-shadow: 0 15px 40px rgba(168, 85, 247, 0.7);
}

.play-button svg {
    width: 50px;
    height: 50px;
    color: white;
    margin-left: 8px;
}

.video-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.video-feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 1rem;
}

.feature-icon-small {
    font-size: 1.5rem;
}

/* ==================== 产品优势区 ==================== */
.advantages-content {
    display: grid;
    gap: var(--spacing-md);
}

.advantage-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-md);
    align-items: start;
    padding: var(--spacing-md);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all 0.3s ease;
}

.advantage-item:hover {
    background: rgba(168, 85, 247, 0.05);
    border-color: rgba(168, 85, 247, 0.4);
}

.advantage-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.advantage-text h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.advantage-text p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ==================== 工作流程区 ==================== */
.workflow {
    background: var(--secondary-bg);
}

.workflow-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

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

.step:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.3);
}

.step-number {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-sm);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.step-icon {
    font-size: 2.5rem;
    margin-top: var(--spacing-sm);
}

.step-arrow {
    font-size: 2rem;
    color: var(--accent-purple);
    text-align: center;
}

.workflow-cta {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

.workflow-cta p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

/* ==================== 适用场景区 ==================== */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

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

.scenario-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.3);
}

.scenario-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.scenario-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.scenario-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.8;
}

/* ==================== 定价区 ==================== */
.pricing {
    background: var(--secondary-bg);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

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

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(168, 85, 247, 0.3);
}

.pricing-card.featured {
    border-color: var(--accent-purple);
    box-shadow: 0 10px 40px rgba(168, 85, 247, 0.4);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.featured-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

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

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
}

.currency {
    font-size: 1.5rem;
    color: var(--accent-purple);
}

.amount {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.period {
    color: var(--text-secondary);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.pricing-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

.pricing-features li.disabled {
    color: rgba(255, 255, 255, 0.3);
    text-decoration: line-through;
}

.pricing-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.pricing-note p {
    margin-bottom: var(--spacing-xs);
}

/* ==================== CTA区 ==================== */
.cta-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.cta-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

/* ==================== 联系区 ==================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.contact-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 12px;
}

.contact-item h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-form {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    background: rgba(10, 14, 39, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.1);
}

.form-group select {
    cursor: pointer;
}

.form-group textarea {
    resize: vertical;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 4fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.footer-column h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

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

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: var(--accent-purple);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.footer-copyright {
    color: var(--text-secondary);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.social-link:hover {
    color: var(--accent-purple);
    border-color: var(--accent-purple);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .workflow-steps {
        grid-template-columns: 1fr;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--secondary-bg);
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .nav-cta {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .showcase-content {
        grid-template-columns: 1fr;
    }

    .video-container {
        max-width: 100%;
    }

    .play-button {
        width: 80px;
        height: 80px;
    }

    .play-button svg {
        width: 40px;
        height: 40px;
    }

    .video-features {
        gap: var(--spacing-sm);
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .pricing-cards {
        grid-template-columns: 1fr;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .pricing-card.featured:hover {
        transform: translateY(-10px);
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    .cta-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    section {
        padding: var(--spacing-md) 0;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ==================== 动画效果 ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.advantage-item,
.scenario-card,
.pricing-card {
    animation: fadeIn 0.6s ease-out;
}

/* 滚动触发动画 */
.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }