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

/* 屏幕阅读器专用 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 头部导航 */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    color: #e74c3c;
    font-size: 28px;
    font-weight: bold;
}

.subtitle {
    color: #666;
    font-size: 12px;
    margin-top: 2px;
}

.nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav a:hover {
    color: #e74c3c;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #e74c3c;
    transition: width 0.3s;
}

.nav a:hover::after {
    width: 100%;
}

/* 主横幅 */
.hero {
    margin-top: 80px;
    padding: 120px 20px;
    text-align: center;
    color: white;
}

.hero-culture {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.hero h2 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: bold;
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.95;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 14px 40px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn-primary {
    background: #fff;
    color: #e74c3c;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

/* 章节标题 */
.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    border-radius: 2px;
}

/* 关于我们 */
.about {
    padding: 80px 20px;
    background: #f9fafb;
}

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

.about-text p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: #666;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: all 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 50px;
    margin-bottom: 15px;
}

.feature-item h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

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

/* 业务领域 - Tab切换 */
.business {
    padding: 80px 20px;
    background: white;
}

.business-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 30px;
    background: #f9fafb;
    border: 2px solid transparent;
    border-radius: 50px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s;
    color: #666;
}

.tab-btn:hover {
    background: #fff;
    border-color: #f5576c;
    color: #f5576c;
}

.tab-btn.active {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    border-color: transparent;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.business-item {
    padding: 30px;
    background: #f9fafb;
    border-radius: 10px;
    transition: all 0.3s;
}

.business-item:hover {
    background: white;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}

.business-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.business-item p {
    color: #666;
    line-height: 1.6;
}

/* 成功案例 */
.cases {
    padding: 80px 20px;
    background: #f9fafb;
}

.cases-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-item {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.case-image {
    height: 250px;
    overflow: hidden;
}

.case-desc {
    padding: 25px;
}

.case-desc h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.case-desc p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.case-tag {
    display: inline-block;
    padding: 5px 15px;
    background: #f093fb;
    color: white;
    border-radius: 20px;
    font-size: 12px;
    margin-right: 10px;
    margin-top: 5px;
}

/* 新闻动态 */
.news {
    padding: 80px 20px;
    background: white;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.news-item {
    display: flex;
    gap: 30px;
    padding: 30px;
    background: #f9fafb;
    border-radius: 10px;
    transition: all 0.3s;
}

.news-item:hover {
    background: white;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transform: translateX(10px);
}

.news-date {
    flex-shrink: 0;
    width: 80px;
    text-align: center;
    padding: 15px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    border-radius: 10px;
}

.news-date .day {
    display: block;
    font-size: 36px;
    font-weight: bold;
    line-height: 1;
}

.news-date .month {
    display: block;
    font-size: 14px;
    margin-top: 5px;
}

.news-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.news-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 10px;
}

.read-more {
    color: #f5576c;
    text-decoration: none;
    font-weight: 500;
}

.read-more:hover {
    text-decoration: underline;
}

/* 商务合作 */
.contact {
    padding: 80px 20px;
    background: #f9fafb;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-details h3 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #333;
}

.contact-details > p {
    color: #666;
    margin-bottom: 30px;
    line-height: 1.6;
}

.detail-item {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.detail-item .icon {
    font-size: 30px;
}

.detail-item h4 {
    font-size: 18px;
    margin-bottom: 5px;
    color: #333;
}

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

.contact-form-wrapper form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-form-wrapper input,
.contact-form-wrapper select,
.contact-form-wrapper textarea {
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 15px;
    font-family: inherit;
}

.contact-form-wrapper input:focus,
.contact-form-wrapper select:focus,
.contact-form-wrapper textarea:focus {
    outline: none;
    border-color: #f5576c;
}

.btn-large {
    padding: 16px 50px;
    font-size: 18px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.btn-large:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(245, 87, 108, 0.3);
}

/* 底部 */
.footer {
    background: #1f2937;
    color: white;
    padding: 60px 20px 30px;
}

.footer-top {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: white;
}

.footer-section p {
    color: #9ca3af;
    line-height: 1.6;
}

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

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

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

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #374151;
}

.footer-bottom p {
    margin: 10px 0;
    color: #9ca3af;
}

.footer-bottom a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav ul {
        gap: 10px;
    }
    
    .hero h2 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .news-item {
        flex-direction: column;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
    }
}