/* 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;
}

/* 导航栏 */
.navbar {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.nav-links a {
    color: white;
    text-decoration: none;
    margin-left: 1.5rem;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

/* 英雄区 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

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

/* 特性卡片 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.feature-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 10px;
    transition: transform 0.3s;
}

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

.feature-card h3 {
    margin-bottom: 0.5rem;
}

/* 内容区 */
.content {
    background: white;
    margin: 2rem auto;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.steps, .client-list {
    padding-left: 2rem;
    line-height: 2;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
    font-size: 1rem;
}

.btn-primary {
    background: #3498db;
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.2rem;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

/* 表单 */
.form-wrapper {
    max-width: 500px;
    margin: 3rem auto;
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.form-wrapper h2 {
    margin-bottom: 1.5rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
}

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

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

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

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

.card h3 {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #f0f0f0;
}

/* 提示框 */
.alert {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1.5rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* 徽章 */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 3px;
    font-size: 0.85rem;
    font-weight: 500;
}

.badge-success {
    background: #28a745;
    color: white;
}

.badge-warning {
    background: #ffc107;
    color: #333;
}

.badge-error {
    background: #dc3545;
    color: white;
}

/* 表格 */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
}

.table tr:hover {
    background: #f8f9fa;
}

/* 套餐 */
.plan-box {
    text-align: center;
    padding: 2rem;
    border: 2px solid #3498db;
    border-radius: 10px;
}

.price {
    font-size: 2rem;
    color: #3498db;
    font-weight: bold;
    margin: 1rem 0;
}

.price-big {
    font-size: 3rem;
    color: #3498db;
    font-weight: bold;
    margin: 1rem 0;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
    text-align: left;
}

.feature-list li {
    padding: 0.5rem 0;
    font-size: 1.1rem;
}

/* 订阅框 */
.subscription-box {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
}

.subscription-box input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: monospace;
}

.subscription-types {
    margin-top: 1.5rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 5px;
}

/* 管理后台 */
.admin-sidebar {
    width: 200px;
    float: left;
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    margin-right: 2rem;
    margin-top: 2rem;
}

.admin-sidebar h3 {
    margin-bottom: 1rem;
}

.admin-sidebar ul {
    list-style: none;
}

.admin-sidebar li {
    margin-bottom: 0.5rem;
}

.admin-sidebar a {
    display: block;
    padding: 0.5rem 1rem;
    color: #333;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
}

.admin-sidebar a:hover,
.admin-sidebar a.active {
    background: #3498db;
    color: white;
}

.admin-content {
    margin-left: 240px;
    padding: 2rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    margin-top: 0.5rem;
}

.plan-detail {
    max-width: 600px;
    margin: 0 auto;
}

/* 工具类 */
.text-center {
    text-align: center;
}

.text-muted {
    color: #6c757d;
    font-size: 0.9rem;
}

/* 页脚 */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

/* 响应式 */
@media (max-width: 768px) {
    .navbar .container {
        flex-wrap: wrap;
    }
    
    .nav-links {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .nav-links a {
        margin-left: 0;
        font-size: 0.85rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .admin-sidebar {
        float: none;
        width: 100%;
        margin-right: 0;
    }
    
    .admin-content {
        margin-left: 0;
    }
    
    .subscription-box {
        flex-direction: column;
    }
}

/* ========== 高级UI效果 ========== */

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 动画类 */
.animate-fadeInUp {
    animation: fadeInUp 0.8s ease both;
}

.animate-fadeIn {
    animation: fadeIn 0.6s ease both;
}

.animate-slideInLeft {
    animation: slideInLeft 0.6s ease both;
}

.animate-slideInRight {
    animation: slideInRight 0.6s ease both;
}

.animate-scaleIn {
    animation: scaleIn 0.5s ease both;
}

.animate-slideDown {
    animation: slideDown 0.5s ease both;
}

/* 延迟动画 */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }

/* 玻璃态效果 */
.glass-effect {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* 悬停提升效果 */
.hover-lift {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-lift:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.25);
}

/* 渐变背景动画 */
.gradient-animate {
    background: linear-gradient(-45deg, #667eea, #764ba2, #f093fb, #4facfe);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

/* 发光效果 */
.glow {
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.6),
                0 0 40px rgba(102, 126, 234, 0.4),
                0 0 60px rgba(102, 126, 234, 0.2);
}

/* 增强卡片效果 */
.card-enhanced {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
    position: relative;
}

.card-enhanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card-enhanced:hover::before {
    transform: scaleX(1);
}

.card-enhanced:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.2);
}

/* 增强按钮效果 */
.btn-enhanced {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-enhanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-enhanced:hover::before {
    left: 100%;
}

.btn-enhanced:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* 渐变文字效果 */
.text-gradient {
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 脉冲动画 */
.pulse-animation {
    animation: pulse 2s ease-in-out infinite;
}

/* 浮动动画 */
.float-animation {
    animation: float 3s ease-in-out infinite;
}

/* 闪光效果 */
.shimmer-effect {
    background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.5) 50%, rgba(255,255,255,0) 100%);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 10px;
    transition: all 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2, #667eea);
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

/* 渐变边框效果 */
.gradient-border {
    position: relative;
    border: 2px solid transparent;
    background-clip: padding-box;
}

.gradient-border::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: inherit;
    z-index: -1;
}

/* 信息卡片增强 */
.info-item-enhanced {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.info-item-enhanced::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), transparent);
    border-radius: 0 0 0 100%;
}

.info-item-enhanced:hover {
    transform: translateX(5px);
    box-shadow: 0 6px 30px rgba(102, 126, 234, 0.15);
}

/* 导航栏增强 */
.navbar {
    backdrop-filter: blur(10px);
    animation: slideDown 0.5s ease;
}

/* 徽章增强 */
.badge {
    transition: all 0.3s ease;
}

.badge:hover {
    transform: scale(1.1);
}

.badge-success {
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.badge-warning {
    background: linear-gradient(135deg, #ff9800, #ffa726);
    box-shadow: 0 4px 12px rgba(255, 152, 0, 0.3);
}

.badge-error {
    background: linear-gradient(135deg, #f44336, #e57373);
    box-shadow: 0 4px 12px rgba(244, 67, 54, 0.3);
}

/* 表格增强 */
.table {
    border-collapse: separate;
    border-spacing: 0;
    overflow: hidden;
    border-radius: 12px;
}

.table thead tr {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.table th {
    padding: 16px;
    font-weight: 600;
}

.table tbody tr {
    transition: all 0.3s ease;
}

.table tbody tr:hover {
    background: #f8f9fa;
    transform: scale(1.01);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

/* 按钮主色调增强 */
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

/* 卡片增强 */
.card {
    transition: all 0.3s ease;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

/* 特性卡片增强 */
.feature-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
}

/* 输入框增强 */
.form-group input:focus,
.form-group textarea:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
    transition: all 0.3s ease;
}

/* 价格显示增强 */
.price, .price-big {
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}