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

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fafbfc;
}

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

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.98);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo h2 {
    color: #2563eb;
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-link {
    text-decoration: none;
    color: #374151;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #2563eb;
}

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

/* 主页横幅 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero::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 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 3rem;
    opacity: 0.95;
    line-height: 1.6;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.btn {
    padding: 15px 35px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: inline-block;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

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

.btn-primary {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-graphic {
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: white;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: float 6s ease-in-out infinite;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 核心优势 */
.features {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, transparent, rgba(248, 250, 252, 0.8));
    z-index: 1;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 4rem;
    color: #1e293b;
    font-weight: 700;
    position: relative;
    z-index: 2;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    position: relative;
    z-index: 2;
}

.feature-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    font-size: 3.5rem;
    color: #2563eb;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1e293b;
    font-weight: 600;
}

.feature-card p {
    color: #64748b;
    line-height: 1.7;
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.feature-stats {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid #e2e8f0;
}

.feature-stats .stat-item {
    display: inline-block;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
    transition: all 0.3s ease;
}

.feature-stats .stat-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

/* 服务概览 */
.services-overview {
    padding: 100px 0;
    background: white;
    position: relative;
}

.services-overview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, rgba(248, 250, 252, 0.8), transparent);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.service-item {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: 3rem 2.5rem;
    border-radius: 20px;
    border: 1px solid rgba(226, 232, 240, 0.8);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    border-color: rgba(37, 99, 235, 0.2);
}

.service-item:hover::before {
    transform: scaleX(1);
}

.service-item h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #1e293b;
    font-weight: 600;
    position: relative;
}

.service-item p {
    color: #64748b;
    line-height: 1.7;
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.service-item .btn {
    margin-top: 1.5rem;
    padding: 12px 30px;
    font-size: 0.95rem;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: white;
    padding: 80px 0 30px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1.5rem;
    color: #e2e8f0;
    font-weight: 600;
    font-size: 1.3rem;
}

.footer-section p,
.footer-section li {
    color: #94a3b8;
    margin-bottom: 0.8rem;
    line-height: 1.6;
}

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

.footer-section a {
    color: #94a3b8;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.footer-section a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: #2563eb;
    transition: width 0.3s ease;
}

.footer-section a:hover {
    color: #2563eb;
}

.footer-section a:hover::before {
    width: 100%;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 30px;
    text-align: center;
    margin-top: 3rem;
    color: #94a3b8;
}

/* 页面标题 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 关于我们页面 */
.about-intro {
    padding: 80px 0;
    background: white;
}

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

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #1e293b;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: #64748b;
    line-height: 1.8;
}

.company-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 0.5rem;
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    width: 300px;
    height: 300px;
    background: #f1f5f9;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: #2563eb;
}

/* 时间线 */
.timeline {
    padding: 80px 0;
    background: #f8fafc;
}

.timeline-container {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
    padding-left: 3rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 20px;
    height: 20px;
    background: #2563eb;
    border-radius: 50%;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.timeline-content h3 {
    color: #2563eb;
    margin-bottom: 1rem;
}

/* 团队 */
.team {
    padding: 80px 0;
    background: white;
}

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

.team-member {
    text-align: center;
    padding: 2rem;
    background: #f8fafc;
    border-radius: 15px;
}

.member-avatar {
    width: 100px;
    height: 100px;
    background: #2563eb;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2.5rem;
    color: white;
}

.member-title {
    color: #2563eb;
    font-weight: 500;
    margin-bottom: 1rem;
}

/* 企业文化 */
.culture {
    padding: 80px 0;
    background: #f8fafc;
}

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

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

.culture-icon {
    font-size: 3rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

/* 服务页面 */
.service-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.service-icon {
    font-size: 3rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.service-features {
    list-style: none;
    margin-top: 1rem;
}

.service-features li {
    padding: 0.5rem 0;
    color: #64748b;
}

.service-features li::before {
    content: '✓';
    color: #2563eb;
    font-weight: bold;
    margin-right: 0.5rem;
}

/* 案例页面 */
.case-categories {
    padding: 40px 0;
    background: #f8fafc;
}

.category-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: 2px solid #2563eb;
    background: transparent;
    color: #2563eb;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn.active,
.filter-btn:hover {
    background: #2563eb;
    color: white;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 40px 0;
}

.case-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.case-image {
    height: 200px;
    background: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #2563eb;
}

.case-content {
    padding: 2rem;
}

.case-category {
    color: #2563eb;
    font-weight: 500;
    margin-bottom: 1rem;
}

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

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #2563eb;
}

.stat-label {
    font-size: 0.9rem;
    color: #64748b;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    padding: 40px 0;
}

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

.stat-icon {
    font-size: 3rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

/* 联系页面 */
.contact-info-section {
    padding: 80px 0;
    background: #f8fafc;
}

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

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

.contact-icon {
    font-size: 3rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.contact-form-section {
    padding: 80px 0;
    background: white;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-graphic {
        width: 200px;
        height: 200px;
        font-size: 3rem;
    }
    
    .feature-card,
    .service-item {
        padding: 2rem 1.5rem;
    }
}

/* 移动端汉堡菜单样式 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
}

.bar {
    width: 25px;
    height: 3px;
    background: #2563eb;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* 加载动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 悬停效果增强 */
.feature-card:hover,
.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.15);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

/* 渐变文字效果 */
.gradient-text {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 卡片边框动画 */
.feature-card::after,
.service-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 2px solid transparent;
    border-radius: 20px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card:hover::after,
.service-item:hover::after {
    opacity: 1;
}