/* ========== 全局样式 ========== */
:root {
    --primary-color: #1890ff;
    --secondary-color: #52c41a;
    --accent-color: #faad14;
    --dark-bg: #f5f5f5;
    --card-bg: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --gradient-primary: linear-gradient(135deg, #1890ff 0%, #52c41a 100%);
    --gradient-accent: linear-gradient(135deg, #faad14 0%, #f5222d 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --border-radius: 8px;
    --container-width: 1200px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ========== Banners Section ========== */
.banners-section {
    padding: 1rem 0;
    background: white;
}

.banners-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.banner-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.banner-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.banner-image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-normal);
}

.banner-item:hover .banner-image {
    transform: scale(1.02);
}

.banner-item a {
    display: block;
    text-decoration: none;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ========== Hero Section ========== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(24, 144, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(82, 196, 26, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(250, 173, 20, 0.1) 0%, transparent 50%);
    animation: particleFloat 20s ease-in-out infinite;
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2rem;
    max-width: 900px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleGlow 3s ease-in-out infinite;
}

@keyframes titleGlow {
    0%, 100% {
        filter: brightness(1);
    }
    50% {
        filter: brightness(1.2);
    }
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    font-weight: 300;
    letter-spacing: 3px;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.6;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-btn {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.hero-btn.btn-primary {
    background: var(--gradient-primary);
    border: none;
    color: white;
    box-shadow: 0 4px 20px rgba(24, 144, 255, 0.4);
}

.hero-btn.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 30px rgba(24, 144, 255, 0.6);
}

.hero-btn.btn-outline-light {
    background: transparent;
    border: 2px solid rgba(24, 144, 255, 0.3);
    color: var(--primary-color);
}

.hero-btn.btn-outline-light:hover {
    background: rgba(24, 144, 255, 0.05);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

/* ========== Stats Section ========== */
.stats-section {
    padding: 3rem 0;
    background: white;
    position: relative;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: all var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ========== Modules Section ========== */
.modules-section {
    padding: 4rem 0;
    background: linear-gradient(180deg, var(--dark-bg) 0%, rgba(24, 144, 255, 0.05) 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.module-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.module-card:hover {
    transform: translateY(-8px);
    border-color: rgba(24, 144, 255, 0.3);
    box-shadow: var(--shadow-lg);
}

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

.module-icon {
    width: 50px;
    height: 50px;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
    transition: all var(--transition-normal);
}

.module-card:hover .module-icon {
    transform: scale(1.1);
    color: var(--primary-color);
}

.module-icon svg {
    width: 100%;
    height: 100%;
}

.module-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.module-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.module-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.module-link svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-normal);
}

.module-link:hover {
    color: var(--primary-color);
}

.module-link:hover svg {
    transform: translateX(5px);
}

.modules-more {
    text-align: center;
    margin-top: 3rem;
}

.modules-more .btn {
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gradient-primary);
    color: white;
    border: none;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.modules-more .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(24, 144, 255, 0.4);
}

/* ========== Overview Section ========== */
.overview-section {
    padding: 4rem 0;
    background: #ffffff;
}

.overview-content {
    padding: 2rem 0;
    max-width: 900px;
    margin: 0 auto;
}

.overview-content p {
    font-size: 1.15rem;
    line-height: 1.8;
    color: #555;
    text-align: justify;
    margin: 0;
}

/* ========== Services Section ========== */
.main-content .services-section {
    padding: 80px 20px !important;
    background: #f8f9fa !important;
}

.main-content .services-section .container {
    max-width: 1200px !important;
    margin: 0 auto !important;
    padding: 0 !important;
}

.main-content .services-section .services-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)) !important;
    gap: 24px !important;
    width: 100% !important;
    max-width: 1200px !important;
    margin: 0 auto !important;
}

.main-content .services-section .service-card {
    background: #ffffff !important;
    border-radius: 12px !important;
    padding: 32px !important;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06) !important;
    transition: all 0.3s ease !important;
    border: 1px solid #e9ecef !important;
    display: block !important;
}

.main-content .services-section .service-card:hover {
    transform: translateY(-4px) !important;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1) !important;
    border-color: rgba(24, 144, 255, 0.2) !important;
}

.main-content .services-section .service-card h3 {
    font-size: 20px !important;
    margin-bottom: 10px !important;
    color: #2c3e50 !important;
    font-weight: 600 !important;
}

.main-content .services-section .service-position {
    display: inline-block !important;
    background: linear-gradient(135deg, #1890ff, #52c41a) !important;
    color: #fff !important;
    padding: 4px 14px !important;
    border-radius: 16px !important;
    font-size: 12px !important;
    margin-bottom: 16px !important;
    font-weight: 500 !important;
}

.main-content .services-section .service-card p {
    color: #666 !important;
    line-height: 1.7 !important;
    font-size: 14px !important;
    margin: 0 !important;
}

/* ========== Features Section ========== */
.features-section {
    padding: 4rem 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.feature-item {
    text-align: center;
    padding: 2.5rem 2rem;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: all var(--transition-normal);
}

.feature-item:hover {
    transform: translateY(-5px);
    border-color: rgba(24, 144, 255, 0.3);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    padding: 1rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    color: white;
    transition: all var(--transition-normal);
}

.feature-item:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== CTA Section ========== */
.cta-section {
    padding: 4rem 0;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-content {
    position: relative;
    text-align: center;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: white;
}

.cta-description {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.cta-btn {
    padding: 1rem 3rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    background: white;
    color: var(--primary-color);
    border: none;
    text-decoration: none;
    transition: all var(--transition-normal);
    display: inline-block;
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

/* ========== Contact Section ========== */
.contact-section {
    padding: 4rem 0;
    background: linear-gradient(180deg, var(--dark-bg) 0%, rgba(24, 144, 255, 0.05) 100%);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.contact-item {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: all var(--transition-normal);
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.contact-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-info {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ========== Footer ========== */
.footer-section {
    padding: 3rem 0;
    background: var(--text-primary);
    color: white;
}

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

.footer-text {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.footer-version {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-btn {
        width: 200px;
        justify-content: center;
    }
    
    .modules-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .cta-description {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .module-card,
    .feature-item,
    .contact-item {
        padding: 1.5rem;
    }
    
    .section-header {
        margin-bottom: 2rem;
    }
    
    .modules-section,
    .features-section,
    .contact-section,
    .cta-section {
        padding: 4rem 0;
    }
}