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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #f59e0b;
    --text-color: #1f2937;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --gray: #6b7280;
    --success: #10b981;
    --shadow: 0 5px 20px rgba(0,0,0,0.08);
    --shadow-hover: 0 10px 30px rgba(0,0,0,0.15);
}

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

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

/* 按钮样式 */
.btn {
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(245, 158, 11, 0.4);
}

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

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

.btn-link {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.3s;
}

.btn-link:hover {
    gap: 1rem;
}

/* 区块标题 */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

.section-desc {
    text-align: center;
    color: var(--gray);
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* 导航栏 */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 0.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s;
}

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

.nav-links a:hover {
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
}

/* 英雄区 */
.hero {
    height: 100vh;
    min-height: 600px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    background-image: url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-blend-mode: overlay;
    color: var(--white);
    display: flex;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(37, 99, 235, 0.85);
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    opacity: 0.95;
    animation: fadeInUp 1s 0.2s;
    animation-fill-mode: both;
    font-weight: 400;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s 0.4s;
    animation-fill-mode: both;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 1s 0.6s;
    animation-fill-mode: both;
}

/* 数据统计 */
.stats {
    background: var(--white);
    padding: 60px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: relative;
    z-index: 2;
    margin-top: -50px;
    border-radius: 10px;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
    padding: 0 2rem;
}

.stat-item {
    padding: 1.5rem;
    transition: transform 0.3s;
}

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

.stat-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: block;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.stat-item p {
    color: var(--gray);
    font-size: 1rem;
    margin: 0;
}

/* 服务概览 */
.services-overview {
    padding: 80px 0;
    background: var(--light-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(0,0,0,0.05);
}

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

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: transform 0.3s;
}

.service-card:hover .service-icon {
    transform: scale(1.1);
}

.service-icon i {
    font-size: 2rem;
    color: var(--white);
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.service-card h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1rem;
    font-weight: 500;
}

.service-card p {
    color: var(--gray);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* 培训项目概览 */
.programs-overview {
    padding: 80px 0;
    background: var(--white);
}

.programs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.program-card {
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.program-image {
    height: 250px;
    overflow: hidden;
}

.program-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.program-info {
    padding: 2rem;
}

.program-info h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.program-info p {
    color: var(--gray);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* 合作企业 */
.cooperation-overview {
    padding: 80px 0;
    background: var(--light-bg);
}

.company-logos {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2rem;
    margin-top: 3rem;
    align-items: center;
}

.company-logo-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

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

.company-logo-item img {
    width: 120px;
    height: 60px;
    object-fit: contain;
    margin-bottom: 1rem;
}

.company-logo-item p {
    color: var(--text-color);
    font-weight: 500;
    margin: 0;
}

/* 页脚 */
.footer {
    background: #1f2937;
    color: var(--white);
    padding: 60px 0 20px;
}

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

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
    color: var(--white);
}

.footer-section p {
    color: #d1d5db;
    line-height: 1.6;
}

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

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

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s;
}

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

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

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s, transform 0.3s;
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #d1d5db;
    font-size: 0.9rem;
}

.footer-bottom a {
    color: #d1d5db;
    text-decoration: none;
}

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

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

/* 响应式设计 */
@media (max-width: 968px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .stats-grid,
    .services-grid,
    .programs-grid,
    .company-logos,
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero h2 {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}