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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-size: cover, cover;
    min-height: 100vh;
}

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

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 60px;
    height: 60px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(102, 126, 234, 0.3));
    transition: transform 0.3s ease;
}

.logo-icon:hover {
    transform: scale(1.1);
}

.nav-logo h2 {
    color: #667eea;
    font-size: 24px;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 10px 15px;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    transform: translateY(-2px);
}

/* 主要内容区域 */
.main-content {
    margin-top: 70px;
    min-height: calc(100vh - 140px);
}

/* 首页英雄区域 */
.hero-section {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9), rgba(118, 75, 162, 0.9)),
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%"><stop offset="0%" stop-color="%23ffffff" stop-opacity="0.1"/><stop offset="100%" stop-color="%23ffffff" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="400" cy="700" r="120" fill="url(%23a)"/></svg>');
    background-size: cover;
    background-position: center;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 15px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

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

.btn-secondary:hover {
    background: white;
    color: #667eea;
    transform: translateY(-3px);
}

/* 功能区域 */
.features-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 80px 0;
    margin: 40px 20px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.features-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #333;
}

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

/* 关于我们页面 */
.about-section {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.9)),
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="b" cx="50%" cy="50%"><stop offset="0%" stop-color="%23667eea" stop-opacity="0.1"/><stop offset="100%" stop-color="%23667eea" stop-opacity="0"/></radialGradient></defs><circle cx="300" cy="300" r="200" fill="url(%23b)"/><circle cx="700" cy="700" r="180" fill="url(%23b)"/></svg>');
    background-size: cover;
    background-position: center;
    min-height: calc(100vh - 140px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-content {
    text-align: center;
    padding: 40px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about-content h1 {
    font-size: 3rem;
    margin-bottom: 30px;
    color: #333;
}

.about-text p {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 20px;
    color: #555;
}

.website-link {
    margin-top: 30px;
}

.website-link a {
    color: #667eea;
    font-size: 1.3rem;
    font-weight: 600;
    text-decoration: none;
    padding: 10px 20px;
    border: 2px solid #667eea;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.website-link a:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* 联系我们页面 */
.contact-section {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.9)),
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="c" cx="50%" cy="50%"><stop offset="0%" stop-color="%23764ba2" stop-opacity="0.1"/><stop offset="100%" stop-color="%23764ba2" stop-opacity="0"/></radialGradient></defs><circle cx="400" cy="400" r="150" fill="url(%23c)"/><circle cx="600" cy="600" r="120" fill="url(%23c)"/></svg>');
    background-size: cover;
    background-position: center;
    min-height: calc(100vh - 140px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-content {
    text-align: center;
    max-width: 800px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.contact-content h1 {
    font-size: 3rem;
    margin-bottom: 40px;
    color: #333;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.contact-icon {
    font-size: 2.5rem;
    min-width: 60px;
}

.contact-details h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: #333;
}

.contact-details p {
    color: #666;
    font-size: 1.1rem;
}

.contact-details a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.contact-details a:hover {
    text-decoration: underline;
}

/* 页脚 */
.footer {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    text-align: center;
    padding: 20px 0;
    position: relative;
    z-index: 100;
}

.footer p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: 20px;
    }

    .nav-menu {
        margin-top: 20px;
        gap: 15px;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-content p {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

    .about-content h1,
    .contact-content h1 {
        font-size: 2.5rem;
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
    }

    .main-content {
        margin-top: 120px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .about-content h1,
    .contact-content h1 {
        font-size: 2rem;
    }

    .features-section {
        margin: 20px 10px;
        padding: 40px 20px;
    }

    .about-content,
    .contact-content {
        padding: 20px;
    }
}