/* 基础样式 */
::root {
    --primary-color: #4a6fa5;
    --secondary-color: #166088;
    --accent-color: #4fc3f7;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #333;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
}

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

/* 导航栏样式 */
.navbar-inverse {
    background: linear-gradient(135deg, #2c3e50, #3498db) !important;
    border: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.navbar-inverse .navbar-brand,
.navbar-inverse .navbar-nav > li > a {
    color: #fff !important;
    font-weight: 500;
}
.navbar-inverse .navbar-nav > li > a:hover {
    background-color: rgba(255,255,255,0.1) !important;
}
.navbar-inverse .dropdown-menu {
    background-color: #2c3e50;
    border: 1px solid rgba(255,255,255,0.1);
}
.navbar-inverse .dropdown-menu > li > a {
    color: #fff !important;
}
.navbar-inverse .dropdown-menu > li > a:hover {
    background-color: rgba(255,255,255,0.1) !important;
}
.navbar-inverse .dropdown-menu .divider {
    background-color: rgba(255,255,255,0.2);
}

/* Card样式优化 */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}
.card-header {
    background: linear-gradient(135deg, #4a6fa5, #166088);
    color: white;
    border: none;
    border-radius: 12px 12px 0 0 !important;
    padding: 1.2rem 1.5rem;
    font-weight: 600;
}
.card-body {
    padding: 2rem;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: 0 0 12px 12px;
    border-left: 1px solid #e9ecef;
    border-right: 1px solid #e9ecef;
    border-bottom: 1px solid #e9ecef;
}
.card-body p:last-child {
    margin-bottom: 0;
}
.card-body .btn {
    border-radius: 6px;
    padding: 10px 20px;
    font-weight: 500;
    transition: all 0.3s ease;
}
.card-body .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Card-body内容美化 */
.card-body h4, .card-body h5, .card-body h6 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-weight: 600;
}
.card-body p {
    color: #555;
    line-height: 1.6;
    margin-bottom: 1rem;
}
.card-body .alert {
    border-radius: 8px;
    border: none;
}
.card-body .form-group {
    margin-bottom: 1.5rem;
}
.card-body .form-label {
    font-weight: 500;
    color: #495057;
    margin-bottom: 0.5rem;
}

/* 按钮样式优化 */
.btn {
    border-radius: 6px;
    padding: 10px 20px;
    font-weight: 500;
    transition: all 0.3s ease;
}
.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* 表单样式优化 */
.form-control {
    border-radius: 6px;
    border: 1px solid #ddd;
    padding: 10px 15px;
    transition: border-color 0.3s ease;
}
.form-control:focus {
    border-color: #4a6fa5;
    box-shadow: 0 0 0 0.2rem rgba(74, 111, 165, 0.25);
}

/* 表格样式优化 */
.table {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.table th {
    background: linear-gradient(135deg, #4a6fa5, #166088);
    color: white;
    font-weight: 600;
    border: none;
}
.table td {
    border-color: #e9ecef;
}

/* 功能卡片 */
.feature-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}
.feature-card h4 {
    color: #2c3e50;
    margin-bottom: 1rem;
}
.feature-card p {
    color: #666;
    margin-bottom: 0;
}

.guide-section {
    background-color: var(--light-color);
    padding: 3rem 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    .card-body {
        padding: 1.5rem;
    }
    .feature-card {
        padding: 1.5rem;
    }