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

html {
    scroll-behavior: smooth;
}

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

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.brand-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #3498db;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #3498db;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

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

.bar {
    width: 25px;
    height: 3px;
    background: #2c3e50;
    margin: 3px 0;
    transition: 0.3s;
}

/* 语言切换按钮 */
.language-switcher {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: 2rem;
}

.lang-btn {
    padding: 8px 15px;
    border: 2px solid #3498db;
    border-radius: 20px;
    background: transparent;
    color: #3498db;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.lang-btn.active {
    background: #3498db;
    color: white;
}

.lang-btn:hover {
    background: #3498db;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="80" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="60" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="70" cy="30" r="1.5" fill="rgba(255,255,255,0.1)"/></svg>') repeat;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.5s forwards;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.7s forwards;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.9s forwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 1s ease 1.1s forwards;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    animation: bounce 2s infinite;
    cursor: pointer;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: #3498db;
    color: white;
    border-color: #3498db;
}

.btn-primary:hover {
    background: transparent;
    color: #3498db;
    border-color: #3498db;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(52, 152, 219, 0.3);
}

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

.btn-secondary:hover {
    background: white;
    color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.3);
}

.btn-outline {
    background: transparent;
    color: #3498db;
    border-color: #3498db;
}

.btn-outline:hover {
    background: #3498db;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(52, 152, 219, 0.3);
}

/* 段落样式 */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.section-header.animate-in h2 {
    opacity: 1;
    transform: translateY(0);
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #3498db, #9b59b6);
    border-radius: 2px;
    transition: transform 0.8s ease;
}

.section-header.animate-in h2::after {
    transform: translateX(-50%) scaleX(1);
    transition-delay: 0.3s;
}

.section-header p {
    font-size: 1.1rem;
    color: #7f8c8d;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.section-header.animate-in p {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.4s;
}

/* 服务部分 */
.services {
    padding: 100px 0;
    background: #f8f9fa;
}

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

.service-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(50px);
}

/* 业务卡片动画效果 */
.service-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.service-card:nth-child(1) {
    transition-delay: 0.1s;
}

.service-card:nth-child(2) {
    transition-delay: 0.3s;
}

.service-card:nth-child(3) {
    transition-delay: 0.5s;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transition: left 0.5s ease;
}

.service-card:hover::before {
    left: 100%;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3498db, #9b59b6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
    transform: scale(0);
    transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.service-card.animate-in .service-icon {
    transform: scale(1);
    animation: iconPulse 2s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(52, 152, 219, 0.4);
    }
    50% {
        box-shadow: 0 0 0 20px rgba(52, 152, 219, 0);
    }
}

.service-card h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.service-card.animate-in h3 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.4s;
}

.service-card p {
    color: #7f8c8d;
    margin-bottom: 1.5rem;
    line-height: 1.6;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.service-card.animate-in p {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.5s;
}

.service-card .btn {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.service-card.animate-in .btn {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 1.2s;
}

.service-features {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
}

.service-features li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.4s ease;
}

.service-card.animate-in .service-features li {
    opacity: 1;
    transform: translateX(0);
}

.service-card.animate-in .service-features li:nth-child(1) { transition-delay: 0.7s; }
.service-card.animate-in .service-features li:nth-child(2) { transition-delay: 0.8s; }
.service-card.animate-in .service-features li:nth-child(3) { transition-delay: 0.9s; }
.service-card.animate-in .service-features li:nth-child(4) { transition-delay: 1.0s; }
.service-card.animate-in .service-features li:nth-child(5) { transition-delay: 1.1s; }

.service-features i {
    color: #27ae60;
    font-size: 0.9rem;
    transition: transform 0.3s ease;
}

.service-features li:hover i {
    transform: scale(1.2) rotate(360deg);
}

/* 服务详情部分 */
.service-details {
    padding: 80px 0;
}

.service-detail {
    margin-bottom: 5rem;
    padding: 3rem 0;
    border-bottom: 1px solid #ecf0f1;
}

.service-detail:last-child {
    border-bottom: none;
}

.service-detail h2 {
    text-align: center;
    font-size: 2.2rem;
    color: #2c3e50;
    margin-bottom: 3rem;
    position: relative;
}

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

.detail-item {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.detail-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.detail-item h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.detail-item h3 i {
    color: #3498db;
}

.feature-highlight {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #3498db;
}

.feature-highlight p {
    margin-bottom: 0.8rem;
}

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

/* 关于我们部分 */
.about {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-text h3 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 1.5rem;
    text-align: center;
}

.about-text p {
    font-size: 1.1rem;
    color: #5a6c7d;
    margin-bottom: 1.5rem;
    text-align: center;
    line-height: 1.8;
}

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

.feature {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature i {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 1rem;
}

.feature h4 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.feature p {
    color: #7f8c8d;
    font-size: 0.95rem;
}

/* 联系我们部分 */
.contact {
    padding: 100px 0;
    background: #2c3e50;
    color: white;
}

.contact .section-header h2 {
    color: white;
}

.contact .section-header p {
    color: #bdc3c7;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-info {
    display: grid;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(10px);
}

.contact-item i {
    font-size: 1.5rem;
    color: #3498db;
    width: 30px;
}

.contact-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: #bdc3c7;
    margin: 0;
}

.contact-form {
    background: rgba(255, 255, 255, 0.1);
    padding: 2.5rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    background: white;
    box-shadow: 0 0 0 2px #3498db;
}

/* 页脚 */
.footer {
    background: #1a252f;
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo {
    height: 50px;
    width: auto;
}

.footer-brand p {
    color: #bdc3c7;
    line-height: 1.6;
}

.footer-links h4,
.footer-services h4 {
    color: white;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-links ul,
.footer-services ul {
    list-style: none;
}

.footer-links li,
.footer-services li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #3498db;
}

.footer-services li {
    color: #bdc3c7;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    color: #95a5a6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.95);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        backdrop-filter: blur(10px);
        padding: 2rem 0;
    }

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

    .nav-toggle {
        display: flex;
    }

    .language-switcher {
        margin-left: 1rem;
        gap: 5px;
    }

    .lang-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .service-card {
        padding: 1.5rem;
    }
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 加载动画 */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: white;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading.hide {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 数字统计动画 */
.service-stats {
    display: flex;
    justify-content: space-around;
    margin: 3rem 0;
    padding: 2rem;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 15px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.services.animate-in .service-stats {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 1.5s;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: #3498db;
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-top: 0.5rem;
}

/* 炫光效果 */
.service-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg) translate(-100%, -100%);
    transition: transform 0.6s ease;
}

.service-card.animate-in::after {
    transform: rotate(45deg) translate(100%, 100%);
    transition-delay: 1.3s;
}