/* 全局样式 */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --dark-color: #343a40;
    --light-color: #f8f9fa;
    --success-color: #198754;
    --danger-color: #dc3545;
}

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

/* 英雄区域 */
.hero-section {
    padding: 80px 0;
    background-color: #f8f9fa;
    background-image: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.min-vh-75 {
    min-height: 75vh;
}

/* 按钮样式 */
.btn {
    border-radius: 4px;
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* 卡片样式 */
.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-radius: 8px;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1) !important;
}

.card-img-top {
    height: 200px;
    object-fit: cover;
}

/* 导航栏 */
.navbar {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-size: 1.5rem;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: rgba(255, 255, 255, 0.8) !important;
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

/* 表单样式 */
.form-control {
    border-radius: 4px;
    padding: 0.75rem;
    border: 1px solid #ced4da;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* 图标样式 */
.bi {
    vertical-align: middle;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-color);
}

footer a {
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--primary-color) !important;
}

/* 响应式调整 */
@media (max-width: 991.98px) {
    .hero-section {
        padding: 60px 0;
    }
    
    .min-vh-75 {
        min-height: auto;
    }
}

@media (max-width: 767.98px) {
    h1 {
        font-size: 2.5rem;
    }
    
    .hero-section {
        padding: 40px 0;
        text-align: center;
    }
    
    .hero-section img {
        margin-top: 30px;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 1s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 自定义背景 */
.bg-gradient-primary {
    background: linear-gradient(135deg, #0d6efd 0%, #0a4bb5 100%);
}

/* 特殊强调文本 */
.text-highlight {
    color: var(--primary-color);
    font-weight: 700;
}

/* 阴影效果 */
.shadow-custom {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 时间线样式 */
.timeline-container {
    position: relative;
    padding: 20px 0;
}

.timeline-container::before {
    content: '';
    position: absolute;
    height: 100%;
    width: 2px;
    background-color: var(--primary-color);
    left: 50%;
    top: 0;
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 30px;
}

.timeline-dot {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    top: 15px;
    left: -10px;
    z-index: 1;
}

.col-md-6.offset-md-6 .timeline-dot {
    left: auto;
    right: -10px;
}

.timeline-date {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.timeline-content {
    border-radius: 8px;
    position: relative;
}

/* 合作伙伴 */
.partners-logo {
    max-height: 80px;
    transition: transform 0.3s ease;
    margin: 10px 0;
    filter: grayscale(100%);
    opacity: 0.7;
}

.partners-logo:hover {
    transform: scale(1.05);
    filter: grayscale(0%);
    opacity: 1;
}

/* 时间线步骤 */
.timeline-step {
    padding: 20px;
}

.timeline-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto;
}