/* SA加速器页面样式 */

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* Layout样式 */
.main-content {
    padding-top: 80px;
    min-height: calc(100vh - 80px);
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #0a58ca 100%);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.navbar-scrolled {
    background: rgba(102, 126, 234, 0.95);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.navbar-brand img {
    transition: transform 0.3s ease;
}

.navbar-brand:hover img {
    transform: scale(1.1);
}

.nav-link {
    position: relative;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: #fff;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* 页脚样式 */
.footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.footer h5, .footer h6 {
    color: #fff;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer .social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.footer .social-links a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.footer ul li a {
    transition: all 0.3s ease;
    position: relative;
    padding-left: 0;
}

.footer ul li a::before {
    content: '→';
    position: absolute;
    left: -15px;
    opacity: 0;
    transition: all 0.3s ease;
}

.footer ul li a:hover {
    padding-left: 15px;
    color: #fff !important;
}

.footer ul li a:hover::before {
    opacity: 1;
}

/* 返回顶部按钮 */
#backToTop {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    border: none;
}

#backToTop:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.4);
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.card-header {
    background-color: #0d6efd;
    color: #fff;
    border-radius: 15px 15px 0 0 !important;
    border: none;
    font-weight: 600;
}

/* 按钮样式 */
.btn {
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-outline-secondary {
    border-color: #6c757d;
    color: #6c757d;
}

.btn-outline-secondary:hover {
    background: #6c757d;
    border-color: #6c757d;
    transform: translateY(-2px);
}

/* 表单样式 */
.form-control {
    border-radius: 8px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    background: #fff;
}

.form-control.is-invalid {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 服务协议页面特殊样式 */
.service-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.service-page .card {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
}

.service-page section {
    border-bottom: 1px solid #e9ecef;
    padding-bottom: 2rem;
}

.service-page section:last-child {
    border-bottom: none;
}

.service-page h3 {
    color: #667eea;
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #667eea;
    display: inline-block;
}

.service-page h5 {
    color: #495057;
    font-weight: 600;
    margin-bottom: 1rem;
}

.service-page ul {
    padding-left: 1.5rem;
}

.service-page ul li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.service-page .alert {
    border-radius: 15px;
    border: none;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
}

/* 条款导航样式 */
.terms-nav {
    position: sticky;
    top: 100px;
    z-index: 100;
}

.terms-nav .card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.terms-nav a {
    color: #6c757d;
    transition: all 0.3s ease;
    padding: 0.5rem 0;
    display: block;
    border-radius: 5px;
    padding-left: 0.5rem;
}

.terms-nav a:hover {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
    text-decoration: none;
}

.terms-nav a.active {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
    font-weight: 600;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .main-content {
        padding-top: 70px;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .footer {
        text-align: center;
    }
    
    .footer .col-md-6.text-md-end {
        text-align: center !important;
        margin-top: 1rem;
    }
    
    .service-page h3 {
        font-size: 1.5rem;
    }
    
    .service-page .ps-4 {
        padding-left: 1rem !important;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .card {
        background: rgba(33, 37, 41, 0.95);
        color: #fff;
    }
    
    .form-control {
        background: rgba(33, 37, 41, 0.9);
        border-color: #495057;
        color: #fff;
    }
    
    .form-control:focus {
        background: #212529;
        color: #fff;
    }
    
    .service-page .card {
        background: rgba(33, 37, 41, 0.98);
        color: #fff;
    }
    
    .service-page h5 {
        color: #e9ecef;
    }
}

/* 首页特殊样式 */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="rgba(255,255,255,0.1)"><polygon points="0,100 1000,0 1000,100"/></svg>');
    background-size: cover;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.hero-section .lead {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* 特性卡片 */
.feature-card {
    text-align: center;
    padding: 2rem;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-card i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 1rem;
}

.feature-card h4 {
    color: #333;
    margin-bottom: 1rem;
    font-weight: 600;
}

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

/* 统计数字 */
.stats-section {
    background: #f8f9fa;
    padding: 4rem 0;
}

.stat-item {
    text-align: center;
    padding: 2rem 1rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    color: #666;
    font-weight: 500;
}

/* 价格卡片 */
.pricing-card {
    border: 2px solid transparent;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.pricing-card:hover {
    border-color: #667eea;
    transform: translateY(-5px);
}

.pricing-card.featured {
    border-color: #667eea;
    transform: scale(1.05);
}

.pricing-card.featured::before {
    content: '推荐';
    position: absolute;
    top: 1rem;
    right: -2rem;
    background: #667eea;
    color: white;
    padding: 0.25rem 2rem;
    transform: rotate(45deg);
    font-size: 0.8rem;
    font-weight: 600;
}

/* 用户评价 */
.testimonial-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 2rem;
    margin: 1rem 0;
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 20px;
    font-size: 4rem;
    color: #667eea;
    opacity: 0.3;
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.testimonial-author {
    font-weight: 600;
    color: #667eea;
}

/* 联系表单 */
.contact-form {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 2rem;
}

.contact-info {
    color: white;
    border-radius: 15px;
    padding: 2rem;
}

.contact-info i {
    font-size: 2rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

/* 错误页面 */
.error-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
}

.error-page h1 {
    font-size: 6rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.error-page h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.error-page p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.8;
}