/* 全局样式 */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --dark-bg: #2c3e50;
    --gradient-primary: linear-gradient(135deg, #3498db, #2c3e50);
    --gradient-secondary: linear-gradient(135deg, #e74c3c, #c0392b);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

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

/* 导航栏样式 */
.header {
    background: var(--gradient-primary);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo h1 {
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
}

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

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

.nav-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

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

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, transparent 0%, rgba(0,0,0,0.3) 100%);
}

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

.hero-content h2 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-content p {
    font-size: 1.5rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.3s backwards;
}

/* 章节通用样式 */
.section {
    padding: 5rem 0;
    position: relative;
}

.section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

/* 关于我们部分 */
.about-content {
    display: grid;
    gap: 2rem;
}

.core-values, .advantages {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.advantage-item {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 8px;
    transition: var(--transition);
}

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

/* 业务范围部分 */
.business-section {
    background: var(--light-bg);
}

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

.business-item {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

/* 团队文化部分 */
.team-section {
    background: var(--gradient-primary);
    color: white;
}

.team-content {
    display: grid;
    gap: 3rem;
}

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

.culture-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

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

/* 未来展望部分 */
.future-section {
    background: var(--light-bg);
}

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

.future-item {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

/* 页脚样式 */
/* 页脚样式 */
.footer {
    background: var(--dark-bg);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer a {
    color: #a0d2ff;
    text-decoration: none;
    transition: var(--transition);
}

.footer a:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        padding: 1rem;
    }

    .nav-menu {
        margin-top: 1rem;
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .hero-content h2 {
        font-size: 2.5rem;
    }

    .hero-content p {
        font-size: 1.2rem;
    }

    .section {
        padding: 3rem 0;
    }

    .section h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .nav-menu {
        flex-direction: column;
        text-align: center;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

    .advantage-grid,
    .business-grid,
    .culture-grid,
    .future-content {
        grid-template-columns: 1fr;
    }
}

/* 联系表单弹窗样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    width: 90%;
    max-width: 600px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

.close-btn {
    position: absolute;
    right: 1.5rem;
    top: 1rem;
    font-size: 2rem;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
}

.close-btn:hover {
    color: var(--accent-color);
    transform: rotate(90deg);
}

.contact-form {
    margin-top: 2rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid #e1e1e1;
    border-radius: 6px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--secondary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.submit-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.2);
}

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

/* 响应式调整 */
@media (max-width: 768px) {
    .modal-content {
        margin: 10% auto;
        padding: 1.5rem;
    }

    .form-group input,
    .form-group textarea {
        padding: 0.6rem;
    }
}

@media (max-width: 480px) {
    .modal-content {
        margin: 15% auto;
        padding: 1rem;
    }

    .close-btn {
        right: 1rem;
        top: 0.5rem;
    }
}