/* 全局变量和基础样式 */
:root {
    --primary-color: #0066cc;      /* 科技蓝 */
    --secondary-color: #00a86b;    /* 成功绿 */
    --accent-color: #ff6b35;       /* 活力橙 */
    --dark-color: #1a365d;         /* 深蓝 */
    --light-color: #f8fafc;
    --text-color: #333;
    --text-light: #666;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
    background-color: white;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Serif SC', serif;
    font-weight: 700;
    margin-bottom: 1rem;
}

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

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

.section-title .subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* 按钮样式 */
.btn {
    padding: 15px 35px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: #0052a3;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 102, 204, 0.3);
}

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

.btn-secondary:hover {
    background: white;
    color: var(--dark-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.2);
}

.btn i {
    margin-right: 10px;
    font-size: 1.2rem;
}

/* 首屏大图 - 修改为少半部分 */
.hero-section {
    position: relative;
    height: 60vh;  /* 从 90vh 改为 60vh */
    min-height: 500px;  /* 从 700px 改为 500px */
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.5)), 
                url('https://images.unsplash.com/photo-1551434678-e076c223a692?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80');
    background-size: cover;
    background-position: center 70%;  /* 调整图片位置，显示更多底部内容 */
    display: flex;
    align-items: center;
    color: white;
    overflow: hidden;
    margin-bottom: 40px;  /* 增加底部间距 */
}


.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(0, 102, 204, 0.3), rgba(0, 168, 107, 0.3));
    z-index: 1;
}


/* 优化首屏内容位置 */
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding-top: 40px;  /* 增加上内边距 */
}

/* 调整标题大小 */
.hero-title {
    font-size: 3rem;  /* 从 3.5rem 改为 3rem */
    font-weight: 900;
    margin-bottom: 1.2rem;
    line-height: 1.2;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: 1.5rem;  /* 从 1.8rem 改为 1.5rem */
    font-weight: 300;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;  /* 从 1.2rem 改为 1.1rem */
    margin-bottom: 2.5rem;
    opacity: 0.9;
    line-height: 1.7;
    max-width: 700px;
}


.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* 核心价值 */
.core-value-section {
    background: linear-gradient(135deg, #f0f7ff 0%, #e6f0fa 100%);
    position: relative;
    overflow: hidden;
}

.core-value-text {
    font-size: 1.8rem;
    text-align: center;
    font-weight: 600;
    color: var(--dark-color);
    line-height: 1.8;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.core-value-text .highlight {
    color: var(--primary-color);
    position: relative;
}

.core-value-text .highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 8px;
    background: rgba(0, 102, 204, 0.1);
    z-index: -1;
}

/* 服务内容 */
.services-section {
    background: white;
}

.service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 35px var(--shadow-color);
    transition: all 0.3s ease;
    height: 100%;
    position: relative;
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.service-card-header {
    padding: 40px 30px 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
    color: white;
    position: relative;
    overflow: hidden;
}

.service-card-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    transform: translateX(-100%);
}

.service-icons {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.service-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.service-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.service-card-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 400;
}

.service-card-body {
    padding: 30px;
}

.service-description {
    color: var(--text-light);
    margin-bottom: 25px;
    line-height: 1.7;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

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

.service-features li i {
    color: var(--primary-color);
    margin-right: 10px;
    font-size: 0.9rem;
}

/* 优势案例 */
.advantages-section {
    background: linear-gradient(135deg, var(--dark-color) 0%, #2d3748 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.advantages-section::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-color) 0%, transparent 70%);
    opacity: 0.1;
    border-radius: 50%;
}

.advantages-section .section-title h2 {
    color: white;
}

.case-study {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 50px;
    margin-bottom: 60px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 1;
}

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

.case-icon {
    width: 70px;
    height: 70px;
    background: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-right: 20px;
    flex-shrink: 0;
}

.case-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.case-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

.case-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0.9;
}

.case-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 15px;
    padding: 25px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-color);
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-color);
    display: block;
    margin-bottom: 10px;
    line-height: 1;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

.case-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.detail-box h4 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.detail-box h4 i {
    margin-right: 10px;
    color: var(--accent-color);
}

.detail-box ul {
    list-style: none;
}

.detail-box li {
    padding: 8px 0;
    position: relative;
    padding-left: 25px;
}

.detail-box li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* 资源网络 */
.resources-section {
    padding-top: 60px;
    position: relative;
    z-index: 1;
}

.resources-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.resources-title i {
    color: var(--accent-color);
    font-size: 2.2rem;
}

.resources-description {
    text-align: center;
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 50px;
    opacity: 0.9;
    line-height: 1.7;
}

.resource-logos {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 25px;
    max-width: 1000px;
    margin: 0 auto 50px;
}

.resource-logo {
    height: 80px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.resource-logo:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--accent-color);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.partner-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    max-width: 900px;
    margin: 0 auto;
}

.partner-type-item {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    transition: all 0.3s ease;
}

.partner-type-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.12);
}

.partner-type-item i {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 15px;
}

.partner-type-item h5 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: white;
}

.partner-type-item p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* CTA区域 */
.cta-section {
    background: white;
    padding: 80px 0;
}

.cta-content {
    background: linear-gradient(135deg, #f0f7ff 0%, #e6f0fa 100%);
    border-radius: 20px;
    padding: 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-content::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
    opacity: 0.1;
    border-radius: 50%;
}

.cta-title {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.cta-description {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* 页脚 */
.footer {
    background: #111;
    color: #999;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    color: white;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.footer-description {
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-contact {
    list-style: none;
}

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

.footer-contact li i {
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-contact li span {
    color: #ccc;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
    font-size: 0.9rem;
}

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

@keyframes shine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}


/* 平板设备 (768px - 992px) */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .core-value-text {
        font-size: 1.5rem;
        padding: 0 20px;
    }
    
    .service-cards {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 40px auto 0;
    }
    
    .case-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cta-content {
        padding: 40px;
    }
    
    .cta-title {
        font-size: 2.2rem;
    }
}

/* 移动设备 (576px - 768px) */
@media (max-width: 768px) {
    .hero-section {
        height: auto;
        min-height: auto;
        padding: 100px 0;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .case-study {
        padding: 30px;
    }
    
    .case-title {
        font-size: 1.7rem;
    }
    
    .case-stats {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .resource-logos {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }
    
    .partner-types {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-contact li {
        justify-content: center;
    }
}

/* 小屏幕手机 (< 576px) */
@media (max-width: 576px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .core-value-text {
        font-size: 1.3rem;
    }
    
    .service-card-header {
        padding: 30px 20px;
    }
    
    .service-icons {
        justify-content: center;
    }
    
    .case-header {
        flex-direction: column;
        text-align: center;
    }
    
    .case-icon {
        margin-right: 0;
        margin-bottom: 20px;
    }
    
    .resource-logos {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partner-types {
        grid-template-columns: 1fr;
    }
    
    .cta-content {
        padding: 30px 20px;
    }
    
    .cta-title {
        font-size: 1.8rem;
    }
    
    .cta-description {
        font-size: 1rem;
    }
}

/* 超小屏幕 (< 400px) */
@media (max-width: 400px) {
    .hero-title {
        font-size: 1.6rem;
    }
    
    .service-card {
        margin: 0 -15px;
        border-radius: 0;
    }
    
    .resource-logo {
        height: 60px;
        font-size: 0.9rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}