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

:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #6366F1;
    --secondary-color: #10B981;
    --secondary-dark: #059669;
    --accent-color: #F59E0B;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.back-home {
    padding: 10px 24px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all 0.3s ease;
}

.back-home:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 主要内容 */
.main-content {
    padding-bottom: 60px;
}

/* 头部区域 */
.hero-section {
    padding: 80px 0 60px;
    text-align: center;
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
}

.icon-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    color: white;
    margin-bottom: 24px;
    animation: float 3s ease-in-out infinite;
}

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

.hero-title {
    font-size: 48px;
    font-weight: 800;
    color: white;
    margin-bottom: 16px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

/* 联系方式区域 */
.contact-section {
    padding: 60px 0;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    color: white;
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 16px;
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 48px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 32px;
    margin-top: 40px;
}

.contact-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-xl);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.contact-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.card-primary:hover {
    border-color: var(--primary-color);
}

.card-secondary:hover {
    border-color: var(--secondary-color);
}

.card-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

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

.card-secondary .card-icon {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    color: white;
}

.card-title-group {
    flex: 1;
}

.card-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: #D1FAE5;
    color: #065F46;
}

.badge-info {
    background: #DBEAFE;
    color: #1E40AF;
}

.card-body {
    margin-bottom: 24px;
}

.card-description {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.card-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.feature-item svg {
    color: var(--secondary-color);
    flex-shrink: 0;
}

.card-footer {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    width: 100%;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    color: white;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(16, 185, 129, 0.5);
}

/* 常见问题区域 */
.faq-section {
    padding: 60px 0;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.faq-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    border-left: 4px solid var(--primary-color);
}

.faq-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-xl);
}

.faq-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-md);
    color: white;
    margin-bottom: 16px;
}

.faq-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.faq-answer {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* 服务承诺区域 */
.promise-section {
    padding: 60px 0;
}

.promise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-top: 40px;
}

.promise-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.promise-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.promise-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    color: white;
    margin: 0 auto 20px;
}

.promise-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.promise-card p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* 页脚 */
.footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    margin-top: 60px;
}

.footer-content {
    text-align: center;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.footer-logo img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.footer-text {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 14px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.separator {
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-title {
        font-size: 28px;
    }

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

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

    .promise-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .card-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 60px 0 40px;
    }

    .hero-title {
        font-size: 28px;
    }

    .contact-section,
    .faq-section,
    .promise-section {
        padding: 40px 0;
    }

    .contact-card,
    .faq-card,
    .promise-card {
        padding: 24px;
    }

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

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

.contact-card,
.faq-card,
.promise-card {
    animation: fadeInUp 0.6s ease-out;
}

.contact-card:nth-child(2) {
    animation-delay: 0.1s;
}

.faq-card:nth-child(2) {
    animation-delay: 0.1s;
}

.faq-card:nth-child(3) {
    animation-delay: 0.2s;
}

.faq-card:nth-child(4) {
    animation-delay: 0.3s;
}

.faq-card:nth-child(5) {
    animation-delay: 0.4s;
}

.faq-card:nth-child(6) {
    animation-delay: 0.5s;
}

.promise-card:nth-child(2) {
    animation-delay: 0.1s;
}

.promise-card:nth-child(3) {
    animation-delay: 0.2s;
}

.promise-card:nth-child(4) {
    animation-delay: 0.3s;
}