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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #121212;
    color: #ffffff;
    line-height: 1.6;
}

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

/* 顶部导航栏 */
.top-nav {
    background-color: #1e1e1e;
    padding: 10px 0;
}

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

.top-nav-left {
    font-size: 16px;
    font-weight: bold;
    color: #ffffff;
}

.top-nav-right {
    display: flex;
    gap: 20px;
}

.top-nav-right a {
    font-size: 14px;
    color: #ffffff;
    text-decoration: none;
}

.top-nav-right a:hover {
    color: #e65100;
}

/* 英雄区 */
.hero {
    background-color: #1e1e1e;
    color: #ffffff;
    padding: 60px 0;
}

.hero-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 10px;
    line-height: 1.2;
}

.hero-text .subtitle {
    font-size: 24px;
    color: #ffcc00;
    margin-bottom: 10px;
}

.hero-text p {
    font-size: 14px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: bold;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: #ffffff;
    color: #e65100;
    border: 2px solid #ffffff;
}

.btn-primary:hover {
    background-color: transparent;
    color: #ffffff;
}

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

.btn-secondary:hover {
    background-color: #ffffff;
    color: #e65100;
}

.hero-image {
    flex: 1;
    text-align: right;
    overflow: hidden;
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.carousel-slide {
    display: flex;
    width: 300%;
    height: 100%;
    animation: slide 15s infinite;
}

.carousel-slide img {
    width: 33.333%;
    height: 100%;
    object-fit: cover;
}

@keyframes slide {
    0% {
        transform: translateX(0);
    }
    33% {
        transform: translateX(0);
    }
    34% {
        transform: translateX(-33.333%);
    }
    66% {
        transform: translateX(-33.333%);
    }
    67% {
        transform: translateX(-66.666%);
    }
    99% {
        transform: translateX(-66.666%);
    }
    100% {
        transform: translateX(0);
    }
}

/* 数据统计区 */
.stats {
    padding: 60px 0;
    background-color: #1e1e1e;
}

.stats-content {
    text-align: center;
    margin-bottom: 40px;
}

.stats-content h2 {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #ffffff;
}

.stats-content p {
    font-size: 14px;
    color: #cccccc;
}

.stats-badge {
    display: inline-block;
    background: linear-gradient(135deg, #e65100, #bf360c);
    color: #ffffff;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
    margin: 10px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.stat-card {
    background-color: #2d2d2d;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.3);
    text-align: center;
    transition: transform 0.3s;
}

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

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #e65100;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 14px;
    color: #cccccc;
}

/* 功能区 */
.features {
    padding: 60px 0;
    background-color: #121212;
}

.features-content h2 {
    text-align: center;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 40px;
    color: #ffffff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.feature-card {
    background-color: #2d2d2d;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s;
    border: 1px solid #3d3d3d;
}

.feature-card:hover {
    transform: translateY(-3px);
    border-color: #e65100;
}

.feature-header {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.feature-icon {
    width: 32px;
    height: 32px;
    background-color: #e65100;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    margin-right: 10px;
}

.feature-card h3 {
    font-size: 14px;
    font-weight: bold;
    color: #ffffff;
}

.feature-card p {
    font-size: 12px;
    color: #cccccc;
    line-height: 1.4;
}

/* 常见问题区 */
.faq {
    padding: 60px 0;
    background-color: #1e1e1e;
}

.faq-content h2 {
    text-align: center;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 40px;
    color: #ffffff;
}

.faq-item {
    background-color: #2d2d2d;
    border: 1px solid #3d3d3d;
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    background-color: #2d2d2d;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question h3 {
    font-size: 14px;
    font-weight: bold;
    color: #ffffff;
}

.faq-answer {
    padding: 20px;
    overflow: visible;
}

.faq-answer p {
    font-size: 14px;
    color: #cccccc;
    line-height: 1.5;
}

.faq-toggle {
    display: none;
}

/* 下载按钮区 */
.download-section {
    text-align: center;
    margin: 40px 0;
}

.download-btn {
    display: inline-block;
    background: linear-gradient(135deg, #e65100, #bf360c);
    color: #ffffff;
    padding: 15px 30px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: bold;
    text-decoration: none;
    box-shadow: 0 5px 15px rgba(230, 81, 0, 0.3);
    transition: transform 0.3s;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(230, 81, 0, 0.5);
}

/* 页脚 */
footer {
    background-color: #333333;
    color: #ffffff;
    padding: 40px 0;
    text-align: center;
}

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

.footer-content p {
    font-size: 12px;
    margin-bottom: 10px;
    opacity: 0.8;
}

@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-image {
        text-align: center;
    }
    
    .top-nav-content {
        flex-direction: column;
        gap: 10px;
    }
    
    .top-nav-right {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 24px;
    }
    
    .hero-text .subtitle {
        font-size: 18px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}