/* styles.css */
:root {
    --primary-color: #1e50a2;
    --secondary-color: #b81c22;
    --accent-color: #f5a623;
    --light-color: #f9f9f9;
    --dark-color: #333;
    --text-color: #444;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Noto Sans SC', 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f4f4f8;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 头部样式 */
.header {
    background: var(--primary-color);
    color: #fff;
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo {
    font-size: 1rem;
    font-weight: 700;
    background-color: #fff;
    color: var(--primary-color);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
    line-height: 1;
    overflow: hidden;
}

.logo:hover {
    transform: rotate(5deg) scale(1.05);
}

.header h1 {
    margin: 0;
    font-size: 1.8rem;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

/* 导航栏样式 */
.nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    gap: 5px;
}

.nav ul li a {
    text-decoration: none;
    color: #fff;
    font-size: 0.95rem;
    padding: 8px 12px;
    border-radius: 20px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.nav ul li a i {
    margin-right: 5px;
    font-size: 1.1rem;
}

.nav ul li a:before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #fff;
    transform: translateX(-100%);
    transition: var(--transition);
}

.nav ul li a:hover:before {
    transform: translateX(0);
}

.nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #fff;
    border-radius: 3px;
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* 英雄区域 */
.hero {
    height: 500px;
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1541339907198-e08756dedf3f?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1500&q=80');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.hero-content {
    max-width: 800px;
    padding: 20px;
    z-index: 1;
}

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 30px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn i {
    margin-left: 8px;
}

.btn:hover {
    background-color: transparent;
    border-color: white;
    transform: translateY(-3px);
}

/* 动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeIn 1s ease forwards;
}

.delay-1 {
    animation-delay: 0.3s;
}

.delay-2 {
    animation-delay: 0.6s;
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 内容部分样式 */
.main-content {
    position: relative;
}

.section {
    padding: 60px 0;
    position: relative;
}

.section-header {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
}

.section-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-right: 15px;
    background-color: rgba(30, 80, 162, 0.1);
    padding: 15px;
    border-radius: 50%;
    transition: var(--transition);
}

.section:hover .section-icon {
    transform: rotate(360deg);
    background-color: rgba(30, 80, 162, 0.2);
}

.section h2 {
    font-size: 2.2rem;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 10px;
}

.section h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--secondary-color);
    transition: var(--transition);
}

.section:hover h2:after {
    width: 100px;
}

.card {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    transform: translateY(-5px);
}

.card:after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 5px;
    width: 0;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    transition: width 0.5s ease;
}

.card:hover:after {
    width: 100%;
}

.section p {
    margin: 0 0 15px;
    font-size: 1.05rem;
    line-height: 1.7;
}

.section p:last-child {
    margin-bottom: 0;
}

/* 统计数据区域 */
.stats-container {
    background-color: var(--primary-color);
    color: white;
    padding: 60px 0;
    margin: 40px 0;
}

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

.stat-item {
    text-align: center;
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.stat-item:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.stat-item i {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--accent-color);
}

.counter {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-item p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 视差滚动区域 */
.parallax-container {
    height: 300px;
    background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1500&q=80');
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin: 40px 0;
}

.parallax-content h3 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.parallax-content p {
    font-size: 1.3rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* 标签页 */
.tabs-container {
    margin-top: 20px;
}

.tabs {
    display: flex;
    border-bottom: 1px solid #ddd;
    margin-bottom: 20px;
}

.tab-btn {
    padding: 12px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-color);
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--primary-color);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-5px);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

/* 滚动显示动画 */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 底部样式 */
.footer {
    background: var(--dark-color);
    color: #fff;
    padding: 60px 0 20px;
}

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

.footer-info {
    line-height: 1.8;
}

.footer-logo {
    font-size: 1.3rem;
    font-weight: 700;
    background-color: white;
    color: var(--primary-color);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    line-height: 1;
    overflow: hidden;
}

.footer-info p {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.footer-info p i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

.footer-links h3, .footer-social h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h3:after, .footer-social h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent-color);
}

.footer-links ul {
    list-style: none;
    padding: 0;
}

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

.footer-links ul li a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
}

.footer-links ul li a:hover {
    color: #fff;
    transform: translateX(5px);
}

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

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-icon:hover {
    background-color: var(--accent-color);
    transform: translateY(-5px);
}

.footer-copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: #aaa;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-social {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .menu-toggle {
        display: flex;
        position: absolute;
        top: 20px;
        right: 20px;
    }
    
    .nav {
        width: 100%;
        display: none;
        margin-top: 20px;
    }
    
    .nav.active {
        display: block;
    }
    
    .nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    .nav ul li {
        width: 100%;
        text-align: center;
    }
    
    .nav ul li a {
        padding: 12px;
        width: 100%;
        justify-content: center;
    }
    
    .hero h2 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.2rem;
    }
    
    .section-header {
        flex-direction: column;
        text-align: center;
    }
    
    .section-icon {
        margin-right: 0;
        margin-bottom: 15px;
    }
    
    .section h2:after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .parallax-content h3 {
        font-size: 2rem;
    }
    
    .parallax-content p {
        font-size: 1.1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-logo {
        margin: 0 auto 20px;
    }
    
    .footer-info p {
        justify-content: center;
    }
    
    .footer-links h3:after, .footer-social h3:after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .social-icons {
        justify-content: center;
    }
    
    .image-gallery {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .gallery-item {
        height: 180px;
    }
}

@media (max-width: 480px) {
    .logo {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .hero {
        height: 400px;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .section {
        padding: 40px 0;
    }
    
    .section h2 {
        font-size: 1.8rem;
    }
    
    .tabs {
        flex-direction: column;
        border-bottom: none;
    }
    
    .tab-btn {
        border: 1px solid #ddd;
        margin-bottom: 5px;
        border-radius: var(--border-radius);
    }
    
    .tab-btn.active {
        border-color: var(--primary-color);
        background-color: rgba(30, 80, 162, 0.1);
    }
}

/* 增强的交互效果 */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.btn:active {
    transform: scale(0.95);
}

.card p {
    transition: var(--transition);
}

.card:hover p {
    color: var(--primary-color);
}

.section-icon {
    position: relative;
}

.section-icon:after {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border: 2px solid rgba(30, 80, 162, 0.3);
    border-radius: 50%;
    opacity: 0;
    transform: scale(1.2);
    transition: var(--transition);
}

.section:hover .section-icon:after {
    opacity: 1;
    transform: scale(1);
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --light-color: #1a1a1a;
        --text-color: #e0e0e0;
    }
    
    body {
        background-color: #121212;
    }
    
    .card {
        background-color: #222;
        color: #e0e0e0;
    }
    
    .tab-btn {
        color: #e0e0e0;
    }
    
    .tabs {
        border-color: #444;
    }
}

/* 图片画廊样式 */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

.gallery-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    height: 200px;
    position: relative;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .image-gallery {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .gallery-item {
        height: 180px;
    }
}