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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #0a0a0a;
    color: #ffffff;
    line-height: 1.6;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #333;
    z-index: 1000;
    padding: 1rem 0;
}

.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-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
}

.nav-logo i {
    color: #6366f1;
    margin-right: 0.5rem;
    font-size: 1.8rem;
}

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

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

.nav-menu a:hover {
    color: #6366f1;
}

/* 主页横幅 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(168, 85, 247, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

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

.gradient-text {
    background: linear-gradient(135deg, #6366f1, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #a0a0a0;
    margin-bottom: 2rem;
    line-height: 1.6;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #6366f1, #a855f7);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #ffffff;
    border: 2px solid #333;
}

.btn-secondary:hover {
    background: #333;
    transform: translateY(-2px);
}

/* 功能特点 */
.features {
    padding: 6rem 0;
    background: #0f0f0f;
}

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

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

.section-header p {
    font-size: 1.125rem;
    color: #a0a0a0;
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.feature-card {
    background: #1a1a1a;
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #333;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: #6366f1;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #6366f1, #a855f7);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon i {
    font-size: 1.5rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #ffffff;
}

.feature-card p {
    color: #a0a0a0;
    line-height: 1.6;
}

/* 联系信息 */
.contact {
    padding: 6rem 0;
    background: #0a0a0a;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    background: #1a1a1a;
    border-radius: 12px;
    border: 1px solid #333;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #6366f1, #a855f7);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.25rem;
    color: white;
}

.contact-details h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #ffffff;
}

.contact-details p {
    color: #a0a0a0;
    margin-bottom: 0.25rem;
}

/* 页脚 */
.footer {
    background: #0f0f0f;
    border-top: 1px solid #333;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.footer-section {
    flex: 1;
}

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

.footer-logo i {
    color: #6366f1;
    margin-right: 0.5rem;
    font-size: 1.8rem;
}

.footer-section p {
    color: #a0a0a0;
    margin-bottom: 1rem;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #a0a0a0;
    font-size: 0.875rem;
}

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

.footer-links a {
    color: #a0a0a0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #6366f1;
}

/* 隐私政策页面样式 */
.page-header {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    text-align: center;
}

.header-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #ffffff;
}

.header-content p {
    font-size: 1.125rem;
    color: #a0a0a0;
}

.privacy-content {
    padding: 4rem 0;
    background: #0a0a0a;
}

.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.policy-section {
    margin-bottom: 3rem;
    padding: 2rem;
    background: #1a1a1a;
    border-radius: 12px;
    border: 1px solid #333;
}

.policy-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #ffffff;
}

.policy-section p {
    color: #a0a0a0;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.policy-section ul {
    list-style: none;
    padding-left: 0;
}

.policy-section li {
    color: #a0a0a0;
    line-height: 1.6;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.policy-section li::before {
    content: '•';
    color: #6366f1;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.contact-methods {
    display: grid;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.contact-method {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: #0f0f0f;
    border-radius: 8px;
    border: 1px solid #333;
}

.contact-method i {
    color: #6366f1;
    font-size: 1.25rem;
    margin-top: 0.25rem;
}

.contact-method h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #ffffff;
}

.contact-method p {
    color: #a0a0a0;
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-container {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .page-header {
        padding: 6rem 0 3rem;
    }
    
    .header-content h1 {
        font-size: 2.5rem;
    }
    
    .policy-section {
        padding: 1.5rem;
    }
    
    .contact-method {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .header-content h1 {
        font-size: 2rem;
    }
    
    .policy-section h2 {
        font-size: 1.25rem;
    }
}