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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
header {
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

header .logo h1 {
    font-size: 1.5rem;
    color: #2563eb;
    margin-bottom: 0.5rem;
}

nav {
    display: flex;
    gap: 1.5rem;
}

nav a {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover,
nav a.active {
    color: #2563eb;
}

/* 主要内容 */
main {
    flex: 1;
    padding: 2rem 0;
}

/* 首页样式 */
.hero {
    text-align: center;
    padding: 3rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 10px;
    margin-bottom: 3rem;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* 功能特性 */
.features {
    margin-bottom: 3rem;
}

.features h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

/* 套餐价格 */
.pricing {
    margin-bottom: 3rem;
}

.pricing h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.pricing-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s;
}

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

.pricing-card h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.price {
    font-size: 2.5rem;
    font-weight: bold;
    color: #2563eb;
    margin-bottom: 1rem;
}

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

.pricing-card ul {
    list-style: none;
    margin: 1.5rem 0;
    text-align: left;
}

.pricing-card ul li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
}

.pricing-card ul li:last-child {
    border-bottom: none;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: #2563eb;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
}

.btn:hover {
    background: #1d4ed8;
}

.btn-secondary {
    background: #6b7280;
}

.btn-secondary:hover {
    background: #4b5563;
}

.btn-block {
    width: 100%;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* 认证页面 */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.auth-container {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.auth-container h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.8rem;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: #2563eb;
}

.form-footer {
    text-align: center;
    margin-top: 1rem;
}

.form-footer a {
    color: #2563eb;
    text-decoration: none;
}

/* 消息提示 */
.message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 5px;
    display: none;
}

.message.success {
    background: #d1fae5;
    color: #065f46;
    display: block;
}

.message.error {
    background: #fee2e2;
    color: #991b1b;
    display: block;
}

/* 用户中心 */
.dashboard {
    max-width: 900px;
    margin: 0 auto;
}

.dashboard h2 {
    margin-bottom: 2rem;
}

.info-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.info-card h3 {
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.info-item {
    display: flex;
    padding: 0.75rem 0;
    border-bottom: 1px solid #eee;
}

.info-item:last-child {
    border-bottom: none;
}

.info-item .label {
    font-weight: 500;
    width: 120px;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.status-badge.active {
    background: #d1fae5;
    color: #065f46;
}

.status-badge.expired {
    background: #fee2e2;
    color: #991b1b;
}

.status-badge.inactive {
    background: #f3f4f6;
    color: #6b7280;
}

/* 订阅链接 */
.subscription-links {
    margin-top: 1rem;
}

.subscription-item {
    margin-bottom: 1.5rem;
}

.subscription-item label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.input-group {
    display: flex;
    gap: 0.5rem;
}

.input-group input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 0.9rem;
}

.help-text {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* 页脚 */
footer {
    text-align: center;
    padding: 2rem 0;
    color: #666;
    margin-top: auto;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h2 {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .feature-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    nav {
        flex-wrap: wrap;
    }
}