/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo h1 {
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 0.2rem;
}

.logo p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav a:hover {
    opacity: 0.8;
}

/* 系统登录按钮样式 */
.system-login-btn {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s;
}

.system-login-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* 主要内容区域 */
main {
    margin-top: 80px;
}

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

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

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

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

.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background-color: #fff;
    color: #667eea;
}

.btn-primary:hover {
    background-color: #f8f9fa;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: #667eea;
}

.btn-system {
    background-color: #ff6b6b;
    color: white;
    border: 2px solid #ff6b6b;
}

.btn-system:hover {
    background-color: #ff5252;
    border-color: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 107, 0.3);
}

/* 快速访问区域 */
.quick-access {
    padding: 3rem 0;
    background-color: white;
    border-bottom: 1px solid #e9ecef;
}

.quick-access-content {
    text-align: center;
}

.quick-access-content h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: #333;
}

.quick-access-buttons {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.quick-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 15px;
    transition: all 0.3s;
    min-width: 200px;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.quick-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

.btn-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.btn-text {
    font-size: 1.1rem;
    font-weight: 600;
}

/* 通用标题样式 */
.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 3rem;
    color: #333;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 核心功能 */
.features {
    padding: 4rem 0;
    background-color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #f0f0f0;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 600;
}

.feature-card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.feature-list li {
    padding: 0.5rem 0;
    color: #555;
    position: relative;
    padding-left: 1.5rem;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

/* 移动端功能 */
.mobile {
    padding: 4rem 0;
    background-color: #f8f9fa;
}

.mobile-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.mobile-info h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #333;
}

.mobile-info p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.mobile-features {
    margin-bottom: 2rem;
}

.mobile-feature {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.mobile-icon {
    font-size: 2rem;
    margin-right: 1rem;
    flex-shrink: 0;
}

.mobile-text h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.mobile-text p {
    font-size: 0.9rem;
    color: #666;
    margin: 0;
}

/* 手机模拟器 */
.phone-mockup {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-screen {
    width: 280px;
    height: 500px;
    background: #1a1a1a;
    border-radius: 30px;
    padding: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    position: relative;
}

.phone-screen::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: #333;
    border-radius: 2px;
}

.app-interface {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 20px;
    color: white;
}

.app-header {
    text-align: center;
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
}

.app-menu {
    display: flex;
    justify-content: space-around;
    margin-bottom: 30px;
}

.menu-item {
    padding: 8px 12px;
    border-radius: 15px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.menu-item.active {
    background-color: rgba(255,255,255,0.2);
}

.app-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.data-card {
    background: rgba(255,255,255,0.1);
    padding: 15px;
    border-radius: 10px;
    text-align: center;
}

.data-card h5 {
    font-size: 0.8rem;
    margin-bottom: 8px;
    opacity: 0.8;
}

.data-value {
    font-size: 1.2rem;
    font-weight: bold;
    margin: 0;
}

/* 解决方案 */
.solutions {
    padding: 4rem 0;
    background-color: white;
}

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

.solution-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 2px solid transparent;
    position: relative;
}

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

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

.solution-card.featured:hover {
    transform: scale(1.05) translateY(-5px);
}

.featured-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.solution-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 600;
}

.solution-card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.solution-card ul {
    list-style: none;
    text-align: left;
    padding: 0;
}

.solution-card ul li {
    padding: 0.5rem 0;
    color: #555;
    position: relative;
    padding-left: 1.5rem;
}

.solution-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

/* 产品中心 */
.products {
    padding: 4rem 0;
    background-color: white;
}

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

.product-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

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

.product-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

.product-card p {
    color: #666;
}

/* 服务优势 */
.services {
    padding: 4rem 0;
    background-color: #f8f9fa;
}

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

.service-item {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.service-item:hover {
    transform: translateY(-5px);
}

.service-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.service-item p {
    color: #666;
}

/* 关于我们 */
.about {
    padding: 4rem 0;
    background-color: white;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: #555;
}

/* 联系我们 */
.contact {
    padding: 4rem 0;
    background-color: #f8f9fa;
}

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

.contact-item {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.contact-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.contact-item p {
    color: #666;
    font-size: 1.1rem;
    word-wrap: break-word;
    line-height: 1.4;
}

.contact-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.contact-link:hover {
    color: #764ba2;
    text-decoration: underline;
}

/* 页脚 */
.footer {
    background-color: #2c3e50;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3 {
    margin-bottom: 1rem;
    color: #ecf0f1;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 1rem;
    text-align: center;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: #bdc3c7;
    font-size: 0.9rem;
}

.footer-bottom a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: #2980b9;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav ul {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .quick-access-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .quick-btn {
        min-width: 250px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .mobile-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .mobile-info {
        order: 2;
    }
    
    .mobile-image {
        order: 1;
    }
    
    .phone-screen {
        width: 240px;
        height: 420px;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-card.featured {
        transform: none;
    }
    
    .solution-card.featured:hover {
        transform: translateY(-5px);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 3rem 0;
    }
    
    .hero-content h2 {
        font-size: 1.8rem;
    }
    
    .product-grid,
    .service-grid,
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .nav ul {
        gap: 0.5rem;
    }
    
    .system-login-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
    
    .quick-btn {
        min-width: 200px;
        padding: 1rem 1.5rem;
    }
    
    .btn-icon {
        font-size: 2rem;
    }
    
    .btn-text {
        font-size: 1rem;
    }
    
    .feature-card {
        padding: 2rem 1.5rem;
    }
    
    .feature-icon {
        font-size: 3rem;
    }
    
    .mobile-info h3 {
        font-size: 1.6rem;
    }
    
    .phone-screen {
        width: 200px;
        height: 360px;
        padding: 15px;
    }
    
    .app-header {
        font-size: 1rem;
    }
    
    .menu-item {
        padding: 6px 8px;
        font-size: 0.8rem;
    }
    
    .data-card {
        padding: 10px;
    }
    
    .data-value {
        font-size: 1rem;
    }
    
    .solution-card {
        padding: 2rem 1.5rem;
    }
}