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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-gray: #f8f9fa;
    --border-color: #ddd;
    --white: #ffffff;
    --dark: #1a1a1a;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* ===== 导航栏 ===== */
.header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo img {
    height: 50px;
}

.logo h1 {
    font-size: 28px;
    color: var(--primary-color);
    font-weight: 700;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-menu li a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-color);
    padding: 10px 0;
    position: relative;
}

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

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: var(--transition);
}

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

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    min-width: 200px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    border-radius: 5px;
    padding: 10px 0;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
}

.dropdown-menu li a:hover {
    background: var(--light-gray);
}

.language-switcher {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.language-switcher .lang-btn {
    padding: 5px 10px;
    border-radius: 4px;
    transition: var(--transition);
}

.language-switcher .lang-btn:hover,
.language-switcher .lang-btn.active {
    background: var(--secondary-color);
    color: var(--white);
}

.language-switcher span {
    color: var(--border-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: var(--transition);
}

/* ===== Banner轮播 ===== */
.hero-slider {
    position: relative;
    height: 600px;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.slider-wrapper {
    position: relative;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.slide:nth-child(2) {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.slide:nth-child(3) {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.slide-content {
    text-align: center;
    color: var(--white);
    padding: 0 20px;
}

.slide-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
    animation: fadeInUp 0.8s ease;
}

.slide-content p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

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

.btn-primary {
    display: inline-block;
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-color);
    font-size: 16px;
    font-weight: 600;
    border-radius: 30px;
    transition: var(--transition);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--white);
    transform: scale(1.2);
}

.slider-nav {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 30px;
}

.slider-nav button {
    width: 50px;
    height: 50px;
    border: none;
    background: rgba(255, 255, 255, 0.3);
    color: var(--white);
    font-size: 20px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.slider-nav button:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* ===== 公司介绍 ===== */
.about-section {
    padding: 80px 0;
    background: var(--white);
}

.about-content {
    text-align: center;
}

.about-text h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    max-width: 800px;
    margin: 0 auto;
}

/* ===== 数据统计 ===== */
.stats-section {
    padding: 60px 0;
    background: var(--light-gray);
}

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

.stat-item {
    text-align: center;
    padding: 30px;
}

.stat-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon i {
    font-size: 28px;
    color: var(--white);
}

.stat-item h3 {
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-item p {
    font-size: 16px;
    color: #666;
}

/* ===== 业务范围 ===== */
.services-section {
    padding: 80px 0;
    background: var(--white);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.section-title h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.title-line {
    width: 80px;
    height: 3px;
    background: var(--secondary-color);
    margin: 0 auto;
}

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

.service-card {
    padding: 40px 30px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon i {
    font-size: 36px;
    color: var(--white);
}

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

.service-card p {
    font-size: 15px;
    line-height: 1.8;
    color: #666;
    text-align: center;
}

/* ===== 业务板块 ===== */
.business-section {
    padding: 80px 0;
    background: var(--light-gray);
}

.view-more {
    position: absolute;
    right: 0;
    top: 10px;
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 16px;
}

.view-more:hover {
    color: var(--primary-color);
}

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

.business-card {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    height: 300px;
}

.business-image {
    width: 100%;
    height: 100%;
}

.business-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.business-card:hover .business-image img {
    transform: scale(1.1);
}

.business-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: var(--white);
}

.business-overlay h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

.business-overlay p {
    font-size: 16px;
    opacity: 0.9;
}

/* ===== 公司资讯 ===== */
.news-section {
    padding: 80px 0;
    background: var(--white);
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.news-card.featured {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.08);
}

.news-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-content {
    padding: 30px;
}

.news-date {
    display: inline-block;
    padding: 5px 15px;
    background: var(--secondary-color);
    color: var(--white);
    font-size: 14px;
    border-radius: 20px;
    margin-bottom: 15px;
}

.news-content h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-content p {
    font-size: 15px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--secondary-color);
    font-weight: 600;
    transition: var(--transition);
}

.read-more:hover {
    gap: 10px;
    color: var(--primary-color);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.news-item {
    padding: 20px;
    background: var(--light-gray);
    border-radius: 10px;
    transition: var(--transition);
}

.news-item:hover {
    background: #e8e8e8;
}

.news-item .news-date {
    background: var(--primary-color);
}

.news-item h4 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.news-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.news-footer {
    text-align: center;
}

.btn-outline {
    display: inline-block;
    padding: 12px 35px;
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
    font-size: 16px;
    font-weight: 600;
    border-radius: 30px;
    transition: var(--transition);
}

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

/* ===== CTA Section ===== */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    text-align: center;
}

.cta-content h2 {
    font-size: 36px;
    color: var(--white);
    margin-bottom: 30px;
}

.btn-large {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 50px;
    background: var(--white);
    color: var(--primary-color);
    font-size: 18px;
    font-weight: 600;
    border-radius: 30px;
    transition: var(--transition);
}

.btn-large:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--dark);
    color: #ccc;
    padding: 60px 0 20px;
}

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

.footer-col h3 {
    font-size: 18px;
    color: var(--white);
    margin-bottom: 20px;
}

.contact-info li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.contact-info i {
    margin-top: 5px;
    color: var(--secondary-color);
}

.contact-info strong {
    color: var(--white);
    display: block;
    margin-bottom: 5px;
}

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

.footer-links a {
    color: #ccc;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
}

/* ===== 页面标题 ===== */
.page-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 80px 0 60px;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 16px;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb a:hover {
    color: var(--white);
}

/* ===== 关于页面 ===== */
.about-detail-section {
    padding: 80px 0;
    background: var(--white);
}

.about-detail-content h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.about-detail-content p {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 15px;
}

.timeline-section {
    padding: 80px 0;
    background: var(--light-gray);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--secondary-color);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 50%;
    position: relative;
    margin-bottom: 40px;
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 50%;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 14px;
    z-index: 2;
}

.timeline-content {
    background: var(--white);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    margin-right: 30px;
    max-width: 400px;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: 0;
    margin-left: 30px;
}

.timeline-content h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-content p {
    color: #666;
    line-height: 1.6;
}

.culture-section {
    padding: 80px 0;
    background: var(--white);
}

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

.culture-item {
    text-align: center;
    padding: 40px 30px;
    background: var(--light-gray);
    border-radius: 10px;
}

.culture-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.culture-icon i {
    font-size: 36px;
    color: var(--white);
}

.culture-item h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

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

.team-section {
    padding: 80px 0;
    background: var(--light-gray);
}

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

.team-card {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.team-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.team-icon i {
    font-size: 32px;
    color: var(--white);
}

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

.team-card p {
    color: #666;
    line-height: 1.6;
}

/* ===== 联系页面 ===== */
.contact-section {
    padding: 80px 0;
    background: var(--white);
}

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

.contact-info-section h2,
.contact-form-section h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.contact-info-section > p,
.contact-form-section > p {
    color: #666;
    margin-bottom: 30px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--light-gray);
    border-radius: 10px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 20px;
    color: var(--white);
}

.contact-text h3 {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.contact-text p {
    color: #666;
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 15px;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
}

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

.btn-submit {
    padding: 15px 30px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(52, 152, 219, 0.3);
}

.map-section {
    padding: 80px 0;
    background: var(--light-gray);
}

.map-section h2 {
    text-align: center;
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 40px;
}

.map-placeholder {
    max-width: 900px;
    height: 400px;
    margin: 0 auto;
    background: #ddd;
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-content {
    text-align: center;
    padding: 40px;
}

.map-content i {
    font-size: 64px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.map-content h3 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.map-content p {
    color: #666;
    margin-bottom: 20px;
}

/* ===== 响应式设计 ===== */
@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        padding: 20px;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .language-switcher {
        display: none;
    }

    .hero-slider {
        height: 500px;
    }

    .slide-content h2 {
        font-size: 36px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .business-grid {
        grid-template-columns: 1fr;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .slide-content h2 {
        font-size: 28px;
    }

    .slide-content p {
        font-size: 16px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 60px;
        padding-right: 0;
    }

    .timeline-marker {
        left: 20px;
    }

    .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 0;
        margin-right: 0;
    }

    .culture-grid {
        grid-template-columns: 1fr;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .page-header h1 {
        font-size: 32px;
    }
}