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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, '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 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

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

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

.logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: #333;
}

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

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

.nav-menu a:hover {
    color: #ff6600;
}

/* 英雄区域 */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    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 1000 1000"><defs><radialGradient id="grad1" cx="50%" cy="50%" r="50%"><stop offset="0%" style="stop-color:rgba(255,255,255,0.1);stop-opacity:1" /><stop offset="100%" style="stop-color:rgba(255,255,255,0);stop-opacity:1" /></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23grad1)"/><circle cx="800" cy="300" r="150" fill="url(%23grad1)"/><circle cx="400" cy="700" r="120" fill="url(%23grad1)"/><circle cx="700" cy="800" r="80" fill="url(%23grad1)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: slideInDown 1s ease-out;
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 300;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
    animation: slideInUp 1s ease-out 0.3s both;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeIn 1s ease-out 0.6s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeIn 1s ease-out 0.9s both;
}

.btn-primary, .btn-secondary {
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(45deg, #ff6600, #ff8533);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 102, 0, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 102, 0, 0.4);
}

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

.btn-secondary:hover {
    background: white;
    color: #333;
    transform: translateY(-2px);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) rotate(45deg); }
    40% { transform: translateY(-10px) rotate(45deg); }
    60% { transform: translateY(-5px) rotate(45deg); }
}

/* 动画 */
@keyframes slideInDown {
    from { opacity: 0; transform: translateY(-50px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Section 通用样式 */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #333;
}

.section-header p {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* 关于我们 */
.about {
    background: #f8f9fa;
}

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

.about-text h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
    margin-top: 2rem;
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-text ul {
    list-style: none;
    padding: 0;
}

.about-text ul li {
    color: #666;
    line-height: 1.8;
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.about-text ul li::before {
    content: '•';
    color: #ff6600;
    font-size: 1.2rem;
    position: absolute;
    left: 0;
    top: 0;
}

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

.stat-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #ff6600;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: #666;
    font-weight: 500;
}

/* 服务模式 */
.services {
    background: white;
}

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

.service-card {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: #ff6600;
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.service-card > p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.service-card ul {
    list-style: none;
    text-align: left;
}

.service-card ul li {
    color: #666;
    line-height: 1.6;
    margin-bottom: 0.5rem;
    padding-left: 1.2rem;
    position: relative;
}

.service-card ul li::before {
    content: '✓';
    color: #ff6600;
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* 团队优势 */
.advantages {
    background: #f8f9fa;
}

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

.advantage-item {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    transition: transform 0.3s ease;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.1);
}

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

.advantage-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.advantage-content h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

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

/* 加入我们 */
.join {
    background: white;
}

.join-content {
    display: flex;
    justify-content: center;
}

.join-requirements {
    max-width: 800px;
    width: 100%;
}

.join-intro {
    text-align: center;
    margin-bottom: 2rem;
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
}

.join-intro p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.8;
    margin: 0;
}

.join-requirements h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #333;
    text-align: center;
}

.join-requirements ul {
    list-style: none;
    padding: 0;
    background: #f8f9fa;
    border-radius: 15px;
    padding: 2rem;
}

.join-requirements ul li {
    color: #666;
    line-height: 1.8;
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
}

.join-requirements ul li::before {
    content: '✓';
    color: #ff6600;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.join-contact {
    text-align: center;
    margin-top: 2rem;
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
}

.join-contact p:first-child {
    display: block;
    margin-bottom: 1rem;
    font-weight: 600;
}

.join-contact p:not(:first-child) {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0.5rem 0;
    color: #666;
    font-size: 1.1rem;
}

.join-contact .contact-icon {
    width: 30px;
    height: 30px;
    display: inline-block;
    text-align: center;
    line-height: 30px;
    font-size: 1.3rem;
    vertical-align: middle;
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #ff6600;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #ff6600;
}

.social-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #555;
    color: white;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #ff6600;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
    color: #ccc;
}

/* 文本居中 */
.text-center {
    text-align: center;
}

/* 联系信息图标 */
.contact-icon {
    margin-right: 10px;
    font-size: 1.2rem;
}

/* 版权信息 */
.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #555;
    color: #ccc;
    margin-top: 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.4rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .services-grid,
    .advantages-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .join-requirements ul {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .nav-container {
        padding: 0.8rem 15px;
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .advantage-item {
        flex-direction: column;
        text-align: center;
    }
    
    .social-links {
        flex-direction: column;
        align-items: center;
    }
    
    .join-requirements ul {
        padding: 1rem;
    }
}

/* 滚动平滑 */
html {
    scroll-behavior: smooth;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #ff6600;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #ff8533;
}