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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #06b6d4;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --background: #ffffff;
    --background-alt: #f8fafc;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 40px;
    width: auto;
}

.company-name {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
}

.language-switcher {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 4px;
}

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* 英雄区域样式 */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.3)),
                url('../images/hero-bg.jpg') center/cover;
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    padding: 0 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
}

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

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

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* 页面英雄区域 - 全屏显示 */
.page-hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 80px;
}

.page-hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* 为不同页面设置不同的背景图 */
.about-hero .page-hero-background {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)),
                url('../images/about-bg.jpg') center/cover;
}

.services-hero .page-hero-background {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)),
                url('../images/services-bg.jpg') center/cover;
}

.solutions-hero .page-hero-background {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)),
                url('../images/solutions-bg.jpg') center/cover;
}

.contact-hero .page-hero-background {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)),
                url('../images/contact-bg.jpg') center/cover;
}

/* 如果某些页面没有特定背景图，使用首页背景作为备用 */
.page-hero-background:not([class*="hero"]) {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)),
                url('../images/hero-bg.jpg') center/cover;
}

.page-title {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 服务预览样式 */
.services-preview {
    padding: 5rem 0;
    background: rgba(255, 255, 255, 0.95);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--background-alt);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon img {
    width: 40px;
    height: 40px;
}

.service-card h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

/* 亮点区域样式 */
.highlights {
    padding: 5rem 0;
    background: rgba(248, 250, 252, 0.9);
}

.highlight-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.highlight-text h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.highlight-list {
    list-style: none;
}

.highlight-list li {
    padding: 0.8rem 0;
    font-size: 1.1rem;
    position: relative;
    padding-left: 2rem;
}

.highlight-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.highlight-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.stat {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* 关于页面样式 */
.about-content {
    padding: 5rem 0;
    background: rgba(255, 255, 255, 0.95);
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text h2 {
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.about-text p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.values-list {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
}

.value-item {
    padding: 1.5rem;
    background: var(--background-alt);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.value-item h4 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.about-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

/* 服务详情页面样式 */
.services-detail {
    padding: 5rem 0;
    background: rgba(255, 255, 255, 0.95);
}

.service-item {
    margin-bottom: 4rem;
    padding: 3rem;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.service-info {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 3rem;
    align-items: start;
}

.service-icon-large {
    width: 100px;
    height: 100px;
    background: var(--background-alt);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon-large img {
    width: 50px;
    height: 50px;
}

.service-details h2 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.service-details p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.feature-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* 解决方案页面样式 */
.solutions-content {
    padding: 5rem 0;
    background: rgba(255, 255, 255, 0.95);
}

.solution-category {
    margin-bottom: 4rem;
}

.solution-category h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.5rem;
    display: inline-block;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.solution-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
    transition: transform 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.solution-card h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.cta-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* 联系页面样式 */
.contact-content {
    padding: 5rem 0;
    background: rgba(255, 255, 255, 0.95);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h2 {
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.contact-icon {
    font-size: 1.5rem;
    margin-top: 0.25rem;
}

.contact-details h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.contact-form-container {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.contact-form-container h2 {
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

.map-section {
    padding: 4rem 0;
    background: rgba(248, 250, 252, 0.9);
}

.map-section h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.map-container {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.map-placeholder {
    height: 400px;
    background: linear-gradient(rgba(37, 99, 235, 0.1), rgba(37, 99, 235, 0.2)),
                url('../images/contact-bg.jpg') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
}

.map-content {
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    padding: 2rem;
    border-radius: 8px;
}

.map-content h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* 页脚样式 */
.footer {
    background: rgba(30, 41, 59, 0.95);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.footer-section a {
    display: block;
    color: white;
    text-decoration: none;
    margin-bottom: 0.5rem;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-section a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

/* 错误样式 */
.error {
    border-color: #dc3545 !important;
}

.error-message {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.8s ease-in;
}

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

.slide-in-left {
    animation: slideInLeft 0.8s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.8s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.scale-in {
    animation: scaleIn 0.6s ease-out;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.page-load {
    animation: pageLoad 1s ease-out;
}

@keyframes pageLoad {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn-animate {
    position: relative;
    overflow: hidden;
}

.btn-animate::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-animate:hover::before {
    left: 100%;
}

.card-hover {
    transition: all 0.3s ease;
}

.card-hover:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* 响应式设计 */
/* 平板设备 */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .page-title {
        font-size: 2.5rem;
    }
    
    .highlight-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .service-info {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .page-hero {
        height: 80vh;
    }
}

/* 移动设备 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow);
        transition: left 0.3s ease;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .page-title {
        font-size: 2.2rem;
    }
    
    .page-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .nav-container {
        padding: 1rem 15px;
    }
    
    .page-hero {
        height: 70vh;
        margin-top: 70px;
    }
    
    .page-title {
        padding: 0 1rem;
    }
    
    .page-subtitle {
        padding: 0 1rem;
    }
}

/* 小屏移动设备 */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .page-title {
        font-size: 1.8rem;
    }
    
    .service-item {
        padding: 1.5rem;
    }
    
    .contact-form-container {
        padding: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .page-hero {
        height: 60vh;
    }
    
    .hero-content,
    .page-hero .container {
        padding: 0 1rem;
    }
}

/* 超大屏幕设备 */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-title {
        font-size: 4rem;
    }
    
    .page-title {
        font-size: 3.5rem;
    }
}
/* 关于页面图片样式 */
.about-image {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.story-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

.story-image:hover {
    transform: scale(1.02);
}

.image-caption {
    text-align: center;
    padding: 1rem;
    background: var(--background-alt);
    border-radius: 8px;
}

.image-caption h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.image-caption p {
    color: var(--text-light);
    font-size: 0.9rem;
}