/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 性能优化 */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 预加载关键资源 */
.preload {
    visibility: hidden;
    position: absolute;
    top: -9999px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5rem;
    color: #fe2c55;
}

.nav-logo i {
    margin-right: 0.5rem;
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: #fe2c55;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #fe2c55;
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主页横幅 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding-top: 80px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.highlight {
    display: block;
    color: #ffd700;
    font-size: 0.8em;
}

.hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #ffd700;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

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

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: #fe2c55;
    color: white;
}

.btn-primary:hover {
    background: #e01e45;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(254, 44, 85, 0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #667eea;
}

.btn-outline {
    background: transparent;
    color: #fe2c55;
    border: 2px solid #fe2c55;
}

.btn-outline:hover {
    background: #fe2c55;
    color: white;
}

.btn-full {
    width: 100%;
}

/* 仪表板预览 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.dashboard-preview {
    width: 400px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.dashboard-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    pointer-events: none;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.dashboard-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: #333;
    font-size: 1.1rem;
}

.dashboard-title i {
    color: #fe2c55;
}

.dashboard-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: #666;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4caf50;
    animation: pulse 2s infinite;
}

.status-dot.active {
    background: #4caf50;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.dashboard-content {
    position: relative;
    z-index: 1;
}

.metric-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.metric-card {
    background: rgba(255, 255, 255, 0.8);
    border-radius: 12px;
    padding: 15px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
}

.metric-icon {
    width: 35px;
    height: 35px;
    background: linear-gradient(135deg, #fe2c55, #ff6b9d);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.metric-info {
    margin-bottom: 8px;
}

.metric-value {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
    color: #333;
    line-height: 1;
}

.metric-label {
    font-size: 0.75rem;
    color: #666;
    display: block;
}

.metric-trend {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.7rem;
    font-weight: 600;
}

.metric-trend.up {
    color: #4caf50;
}

.metric-trend.down {
    color: #f44336;
}

.progress-section {
    background: rgba(255, 255, 255, 0.8);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #333;
}

.progress-percentage {
    color: #fe2c55;
}

.progress-bar {
    height: 6px;
    background: rgba(254, 44, 85, 0.1);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    width: 74%;
    background: linear-gradient(90deg, #fe2c55, #ff6b9d);
    border-radius: 3px;
    animation: progressGrow 2s ease-out;
}

@keyframes progressGrow {
    from { width: 0%; }
    to { width: 74%; }
}

.progress-info {
    font-size: 0.75rem;
    color: #666;
}

/* 功能特色部分 */
.features {
    padding: 5rem 0;
    background: #f8f9ff;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #fe2c55, #ff6b9d);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* 产品优势部分 */
.advantages {
    padding: 5rem 0;
    background: white;
}

.advantages-content {
    display: grid;
    gap: 3rem;
}

.advantage-item {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.advantage-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    flex-shrink: 0;
}

.advantage-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.advantage-content p {
    color: #666;
    line-height: 1.6;
}

/* 价格方案部分 */
.pricing {
    padding: 5rem 0;
    background: #f8f9ff;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 1200px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 800px;
    }
}

.pricing-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    position: relative;
    min-width: 250px;
}

.pricing-card.featured {
    transform: scale(1.05);
    box-shadow: 0 25px 50px rgba(254, 44, 85, 0.2);
    border: 2px solid #fe2c55;
}

.pricing-card:hover {
    transform: translateY(-5px);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-5px);
}

.badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: #fe2c55;
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.pricing-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
}

.price {
    margin-bottom: 2rem;
}

.currency {
    font-size: 1.2rem;
    vertical-align: top;
    color: #666;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: #fe2c55;
}

.period {
    color: #666;
    font-size: 1rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.pricing-features li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pricing-features i {
    color: #4caf50;
}

/* 使用教程部分 */
.tutorial {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.tutorial-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-top: 50px;
}

.tutorial-text h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 20px;
}

.tutorial-text p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.tutorial-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 40px;
}

.tutorial-feature {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tutorial-feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.tutorial-feature i {
    font-size: 2rem;
    color: #fe2c55;
    width: 50px;
    text-align: center;
}

.tutorial-feature h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.tutorial-feature p {
    font-size: 0.95rem;
    color: #666;
    margin: 0;
}

.tutorial-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.tutorial-actions .btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.tutorial-actions .btn i {
    font-size: 1.1rem;
}

.tutorial-qr {
    display: flex;
    justify-content: center;
}

.tutorial-qr .qr-container {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 350px;
    width: 100%;
}

.tutorial-qr .qr-container h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}

.tutorial-qr .qr-subtitle {
    font-size: 1rem;
    color: #666;
    margin-bottom: 25px;
}

.tutorial-qr .qr-code {
    margin-bottom: 25px;
}

.tutorial-qr .qr-placeholder {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    background: #f8f9fa;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed #dee2e6;
    transition: all 0.3s ease;
}

.tutorial-qr .qr-placeholder:hover {
    border-color: #fe2c55;
    background: #fff5f6;
}

.tutorial-qr .qr-placeholder img {
    border-radius: 8px;
    max-width: 100%;
    height: auto;
}

.tutorial-qr .qr-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.tutorial-qr .qr-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: #666;
}

.tutorial-qr .qr-item i {
    color: #fe2c55;
    width: 16px;
}

.tutorial-qr .contact-backup {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    font-size: 0.9rem;
    color: #666;
}

.tutorial-qr .contact-backup strong {
    color: #fe2c55;
    font-weight: 600;
}

/* 联系我们部分 */
.contact {
    padding: 5rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.contact-info p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-method i {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.contact-method h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.contact-method p {
    opacity: 0.8;
    margin: 0;
}

.contact-qr {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 20px;
}

.qr-container {
    text-align: center;
}

.qr-container h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: white;
}

.qr-subtitle {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
}

.qr-code {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

/* 双二维码布局 */
.qr-container-row {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.qr-item-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.qr-label {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.95);
}

.qr-placeholder {
    width: 180px;
    height: 180px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.qr-placeholder:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.qr-placeholder i {
    font-size: 3rem;
    color: #1aad19;
}

.qr-placeholder span {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.qr-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.qr-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    justify-content: center;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
}

.qr-item i {
    width: 20px;
    color: #ffd700;
}

.contact-backup {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

.contact-backup strong {
    color: #ffd700;
    font-weight: 600;
}

/* 页脚 */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5rem;
    color: #fe2c55;
    margin-bottom: 1rem;
}

.footer-logo i {
    margin-right: 0.5rem;
    font-size: 2rem;
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #fe2c55;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #fe2c55;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 1rem;
    text-align: center;
    color: #888;
}

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

.fadeInUp {
    animation: fadeInUp 0.6s ease;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

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

    .hero-stats {
        justify-content: center;
    }

    .hero-actions {
        justify-content: center;
        flex-wrap: wrap;
    }

    .dashboard-preview {
        width: 320px;
        padding: 20px;
    }
    
    .metric-cards {
        grid-template-columns: 1fr;
        gap: 10px;
    }

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

    .advantage-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        max-width: 600px;
    }
    
    /* 在平板尺寸上重新排序，让推荐版更显眼 */
    .pricing-card:nth-child(1) { order: 1; }
    .pricing-card:nth-child(2) { order: 3; }
    .pricing-card:nth-child(3) { order: 2; } /* 推荐版放在右上角 */
    .pricing-card:nth-child(4) { order: 4; }

    .pricing-card.featured {
        transform: none;
    }

    .tutorial-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .tutorial-text h3 {
        font-size: 1.5rem;
    }

    .tutorial-features {
        gap: 15px;
    }

    .tutorial-feature {
        padding: 15px;
    }

    .tutorial-feature i {
        font-size: 1.5rem;
        width: 40px;
    }

    .tutorial-actions {
        flex-direction: column;
    }

    .tutorial-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .tutorial-qr .qr-container {
        padding: 30px 20px;
    }

    .tutorial-qr .qr-placeholder {
        width: 180px;
        height: 180px;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .section-header h2 {
        font-size: 2rem;
    }

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

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding-top: 100px;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        max-width: 400px;
    }
    
    /* 在手机尺寸上恢复正常顺序 */
    .pricing-card:nth-child(1) { order: 1; }
    .pricing-card:nth-child(2) { order: 2; }
    .pricing-card:nth-child(3) { order: 3; }
    .pricing-card:nth-child(4) { order: 4; }

    .feature-card,
    .pricing-card,
    .contact-qr {
        padding: 1.5rem;
    }
    
    .qr-placeholder {
        width: 160px;
        height: 160px;
    }
    
    .qr-container-row {
        gap: 10px;
    }
    
    .qr-label {
        font-size: 0.75rem;
    }
    
    .qr-placeholder i {
        font-size: 2.5rem;
    }

    .dashboard-preview {
        width: 280px;
        padding: 15px;
    }
    
    .metric-card {
        padding: 12px;
    }
    
    .metric-icon {
        width: 30px;
        height: 30px;
        font-size: 0.8rem;
    }
    
    .metric-value {
        font-size: 1rem;
    }

    .advantages {
        padding: 3rem 0;
    }

    .tutorial {
        padding: 60px 0;
    }

    .tutorial-text h3 {
        font-size: 1.3rem;
    }

    .tutorial-text p {
        font-size: 1rem;
    }

    .tutorial-feature {
        padding: 12px;
    }

    .tutorial-feature i {
        font-size: 1.3rem;
        width: 35px;
    }

    .tutorial-feature h4 {
        font-size: 1.1rem;
    }

    .tutorial-qr .qr-placeholder {
        width: 140px;
        height: 140px;
    }
    
    .qr-container-row {
        gap: 15px;
    }
    
    .qr-label {
        font-size: 0.8rem;
    }

    .features,
    .pricing,
    .contact {
        padding: 3rem 0;
    }
}

/* 弹窗模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.modal-content {
    background: white;
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(-50px);
    transition: transform 0.3s ease;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 2rem 1rem;
    border-bottom: 1px solid #eee;
}

.modal-header h2 {
    color: #333;
    font-size: 1.5rem;
    margin: 0;
}

.close {
    color: #999;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
    transition: color 0.3s ease;
}

.close:hover {
    color: #fe2c55;
}

.modal-body {
    padding: 1rem 2rem 2rem;
}

.modal-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 2rem;
    font-size: 1rem;
}

.modal-contacts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.modal-contact-item {
    background: #f8f9ff;
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.modal-contact-item:hover {
    border-color: #fe2c55;
    box-shadow: 0 5px 20px rgba(254, 44, 85, 0.1);
}

.qr-image {
    width: 120px;
    height: 120px;
    border-radius: 10px;
    margin-bottom: 1rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.qr-placeholder-small {
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    margin: 0 auto 1rem;
    border: 2px solid rgba(26, 173, 25, 0.2);
}

.qr-placeholder-small i {
    font-size: 2rem;
    color: #1aad19;
}

.qr-placeholder-small span {
    font-size: 0.8rem;
    color: #666;
}

.contact-info h4 {
    color: #333;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.wechat-id {
    color: #fe2c55;
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.contact-desc {
    color: #666;
    font-size: 0.85rem;
    margin: 0;
}

.modal-tips {
    background: linear-gradient(135deg, #f8f9ff 0%, #fff 100%);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.tip-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #666;
}

.tip-item i {
    color: #fe2c55;
    width: 16px;
}

/* 移动端弹窗适配 */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .modal-header,
    .modal-body {
        padding: 1.5rem;
    }
    
    .modal-contacts {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .modal-tips {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .tip-item {
        justify-content: center;
    }
}