/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a73e8;
    --primary-dark: #0d47a1;
    --primary-light: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --warning-color: #fbbc04;
    --dark-color: #202124;
    --light-color: #f8f9fa;
    --gray-color: #5f6368;
    --light-gray: #dadce0;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --border-radius: 8px;
    --border-radius-lg: 12px;
}

body {
    font-family: 'Noto Sans SC', 'Roboto', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--white);
}

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

/* 按钮样式 */
.btn-primary, .btn-secondary, .btn-outline {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 16px;
}

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

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

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

.btn-secondary:hover {
    background-color: #2e7d32;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

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

/* 导航栏样式 */
.navbar {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px 0;
}

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

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    font-size: 32px;
    color: var(--primary-color);
}

.company-name h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 4px;
}

.company-name p {
    font-size: 12px;
    color: var(--gray-color);
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
    background-color: rgba(26, 115, 232, 0.1);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--dark-color);
    cursor: pointer;
}

/* 英雄区域样式 */
.hero {
    padding: 180px 0 100px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    margin-top: 70px;
}

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

.hero-text h2 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 500;
}

.hero-text h1 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.hero-text p {
    font-size: 18px;
    color: var(--gray-color);
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

.hero-image img {
    width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

/* 统计数据样式 */
.stats {
    padding: 80px 0;
    background-color: var(--white);
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--gray-color);
    margin-bottom: 50px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 40px 20px;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    color: var(--gray-color);
}

/* 解决方案样式 */
.solutions {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.solution-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

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

.solution-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.solution-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.solution-card p {
    color: var(--gray-color);
    margin-bottom: 20px;
    line-height: 1.6;
}

.solution-features {
    list-style: none;
    text-align: left;
    margin-top: 20px;
}

.solution-features li {
    margin-bottom: 10px;
    color: var(--gray-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.solution-features i {
    color: var(--secondary-color);
}

/* 新闻动态样式 */
.news {
    padding: 80px 0;
    background-color: var(--white);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.news-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
}

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

.news-date {
    background: var(--primary-color);
    color: var(--white);
    padding: 20px;
    text-align: center;
    min-width: 100px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-date .day {
    font-size: 32px;
    font-weight: 700;
    display: block;
}

.news-date .month {
    font-size: 16px;
    display: block;
    margin: 5px 0;
}

.news-date .year {
    font-size: 14px;
    display: block;
}

.news-content {
    padding: 30px;
    flex: 1;
}

.news-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.news-content p {
    color: var(--gray-color);
    margin-bottom: 20px;
    line-height: 1.6;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.read-more:hover {
    gap: 10px;
}

.news-more {
    text-align: center;
    margin-top: 50px;
}

/* 合作伙伴样式 */
.partners {
    padding: 60px 0;
    background-color: #f8f9fa;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.partner-logo {
    background: var(--white);
    padding: 30px 20px;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 600;
    color: var(--dark-color);
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
}

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

/* 页脚样式 */
.footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 50px;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 25px;
    color: var(--white);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.footer-logo i {
    font-size: 32px;
    color: var(--primary-light);
}

.footer-logo h3 {
    font-size: 24px;
    font-weight: 700;
}

.footer-section p {
    color: #b0b7c3;
    line-height: 1.6;
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: #b0b7c3;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #b0b7c3;
    margin-bottom: 15px;
}

.contact-info i {
    color: var(--primary-light);
    width: 20px;
}

.subscribe-form {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.subscribe-form input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: var(--white);
}

.subscribe-form input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.subscribe-form button {
    padding: 12px 25px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.subscribe-form button:hover {
    background: var(--primary-dark);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #b0b7c3;
    font-size: 14px;
}

.footer-bottom p {
    margin-bottom: 10px;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-text h1 {
        font-size: 40px;
    }
    
    .stats-grid,
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 20px;
        box-shadow: var(--shadow);
    }
    
    .nav-menu.active {
        display: block;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 10px;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: 150px 0 60px;
    }
    
    .hero-text h1 {
        font-size: 32px;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .stats-grid,
    .solutions-grid,
    .news-grid,
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-text h1 {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-outline {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .news-card {
        flex-direction: column;
    }
    
    .news-date {
        min-width: auto;
        flex-direction: row;
        justify-content: center;
        gap: 10px;
        padding: 15px;
    }
    
    .news-date .day,
    .news-date .month,
    .news-date .year {
        display: inline;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(26, 115, 232, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 工具类 */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mt-40 {
    margin-top: 40px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-40 {
    margin-bottom: 40px;
}

.p-20 {
    padding: 20px;
}

.p-40 {
    padding: 40px;
}

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}