:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --accent-color: #fd7e14;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

body {
    font-family: 'Noto Sans TC', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
}

/* 主頁樣式 */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color), #0a58ca);
    color: white;
    padding: 4rem 0;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

/* 二級頁面樣式 */
.page-header {
    background: linear-gradient(135deg, var(--primary-color), #0a58ca);
    color: white;
    padding: 2rem 0;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
}

.breadcrumb {
    background-color: transparent;
}

.breadcrumb-item a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

.breadcrumb-item.active {
    color: white;
}

/* 通用樣式 */
.section-title {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.card {
    transition: transform 0.3s, box-shadow 0.3s;
    margin-bottom: 1.5rem;
    height: 100%;
}

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

.card-title {
    color: var(--primary-color);
}

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

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

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

.conclusion-box {
    background-color: var(--light-color);
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem;
    margin: 2rem 0;
}

.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

.nav-pills .nav-link.active {
    background-color: var(--primary-color);
}

.comparison-chart {
    max-width: 100%;
    height: auto;
    margin: 2rem 0;
}

/* 特點卡片樣式 */
.feature-card {
    border-left: 4px solid var(--primary-color);
    margin-bottom: 1.5rem;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateX(5px);
}

.feature-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* 標籤頁樣式 */
.tab-content {
    padding: 1.5rem;
    border: 1px solid #dee2e6;
    border-top: none;
    border-radius: 0 0 0.25rem 0.25rem;
}

/* 返回頂部按鈕 */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    z-index: 1000;
}

.back-to-top:hover {
    background-color: #0a58ca;
    color: white;
}

/* 響應式調整 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .page-title {
        font-size: 1.75rem;
    }
}