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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 32px;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-2);
    transition: width 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

/* ===== 英雄区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 80px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.gradient-text {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.btn {
    padding: 15px 35px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn-primary {
    background: var(--gradient-2);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.btn-full {
    width: 100%;
}

.hero-stats {
    display: flex;
    gap: 60px;
}

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

.stat-number {
    display: block;
    font-size: 42px;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ===== 通用区块样式 ===== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 10px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 16px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ===== 关于我们 ===== */
.about {
    background: var(--bg-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 30px;
}

.feature-list li {
    color: var(--text-primary);
    font-weight: 500;
}

.about-image .image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #e0e7ff 0%, #f3e8ff 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 18px;
}

/* ===== 核心业务 ===== */
.services {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 产品中心 ===== */
.products {
    background: var(--bg-white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    position: relative;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.product-image {
    height: 200px;
    background: linear-gradient(135deg, #e0e7ff 0%, #f3e8ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image .image-placeholder.small {
    height: auto;
    padding: 20px;
}

.product-card h3 {
    padding: 25px 25px 10px;
    font-size: 22px;
}

.product-card p {
    padding: 0 25px 20px;
    color: var(--text-secondary);
}

.product-link {
    display: block;
    padding: 0 25px 25px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

/* ===== 团队介绍 ===== */
.team {
    background: var(--bg-light);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.team-card {
    background: white;
    padding: 30px 20px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.team-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--gradient-2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-placeholder {
    color: white;
    font-weight: 600;
    font-size: 16px;
}

.team-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.team-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ===== 联系我们 ===== */
.contact {
    background: var(--bg-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 32px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #e0e7ff 0%, #f3e8ff 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-item h4 {
    font-size: 18px;
    margin-bottom: 5px;
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-form .form-group {
    margin-bottom: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-form textarea {
    resize: vertical;
}

/* ===== 页脚 ===== */
.footer {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 20px;
    margin-bottom: 20px;
}

.footer-section p {
    color: #9ca3af;
    line-height: 1.8;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.social-links {
    display: flex;
    gap: 15px;
}

.social-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    font-size: 12px;
    transition: background 0.3s ease;
}

.social-icon:hover {
    background: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9ca3af;
}

/* ===== Toast 提示消息 ===== */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #333;
    color: white;
    padding: 15px 30px;
    border-radius: 50px;
    font-weight: 500;
    z-index: 10000;
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.toast-error {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.toast-info {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

/* ===== 表单成功消息 ===== */
.form-success {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 100%);
    border-radius: 20px;
    margin-top: 20px;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 40px;
    color: white;
}

.form-success h3 {
    color: #059669;
    font-size: 24px;
    margin-bottom: 10px;
}

.form-success p {
    color: #6b7280;
}

/* ===== 关于我们信息卡片 ===== */
.about-info-card {
    background: linear-gradient(135deg, #e0e7ff 0%, #f3e8ff 100%);
    border-radius: 20px;
    padding: 40px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 30px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.info-icon {
    font-size: 32px;
}

.info-item strong {
    display: block;
    font-size: 24px;
    color: #1f2937;
}

.info-item small {
    color: #6b7280;
    font-size: 12px;
}

/* ===== 产品图标 ===== */
.product-icon {
    font-size: 48px;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .services-grid,
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .services-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .toast {
        left: 20px;
        right: 20px;
        transform: translateX(0) translateY(100px);
    }
    
    .toast.show {
        transform: translateX(0) translateY(0);
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
    }
    
    .feature-list {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 合作伙伴 ===== */
.partners {
    background: #f8fafc;
    padding: 40px 0;
    overflow: hidden;
}

.partners-track {
    display: flex;
    gap: 60px;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
}

.partner-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.partner-item:hover {
    opacity: 1;
}

.partner-logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #e0e7ff 0%, #f3e8ff 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.partner-name {
    font-size: 14px;
    color: #6b7280;
    text-align: center;
}

/* ===== 成功案例 ===== */
.cases {
    background: #ffffff;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.case-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.15);
}

.case-image {
    height: 180px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
}

.case-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    margin-top: 15px;
}

.case-content {
    padding: 30px;
}

.case-industry {
    display: inline-block;
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 15px;
}

.case-card h3 {
    font-size: 22px;
    margin-bottom: 10px;
    color: #1f2937;
}

.case-card p {
    color: #6b7280;
    line-height: 1.7;
    margin-bottom: 15px;
}

.case-results {
    background: #f0fdf4;
    border-radius: 10px;
    padding: 15px;
    font-size: 14px;
    color: #166534;
}

/* ===== 新闻动态 ===== */
.news {
    background: #f8fafc;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    cursor: pointer;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

.news-image {
    height: 140px;
    background: linear-gradient(135deg, #06b6d4 0%, #2563eb 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
}

.news-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 10px;
    display: inline-block;
}

.news-badge-news { background: #dbeafe; color: #1d4ed8; }
.news-badge-update { background: #d1fae5; color: #059669; }
.news-badge-notice { background: #fef3c7; color: #d97706; }

.news-content {
    padding: 25px;
}

.news-date {
    font-size: 12px;
    color: #9ca3af;
    margin-bottom: 8px;
}

.news-card h3 {
    font-size: 18px;
    line-height: 1.5;
    margin-bottom: 10px;
    color: #1f2937;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card p {
    font-size: 14px;
    color: #6b7280;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== 响应式补充 ===== */
@media (max-width: 1024px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
    .partners-track {
        gap: 30px;
    }
}