/* 
 * BitInvs 前台樣式
 * 主題顏色: 藍色 (#3498db), 深藍 (#2980b9), 淺灰 (#f5f5f5)
 */

/* 全局樣式 */
body {
    font-family: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
    color: #333;
    background-color: #f9f9f9;
}

a {
    color: #3498db;
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: #2980b9;
    text-decoration: none;
}

.btn-primary {
    background-color: #3498db;
    border-color: #3498db;
}

.btn-primary:hover, .btn-primary:focus {
    background-color: #2980b9;
    border-color: #2980b9;
}

.btn-secondary {
    background-color: #34495e;
    border-color: #34495e;
}

.btn-secondary:hover, .btn-secondary:focus {
    background-color: #2c3e50;
    border-color: #2c3e50;
}

/* 導航欄樣式 */
.navbar {
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand img {
    max-height: 40px;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    padding: 0.5rem 1rem;
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: #fff;
}

.nav-item.download-button {
    margin-left: 10px;
}

.nav-item.download-button .nav-link {
    padding: 8px 20px;
    border-radius: 4px;
}

/* 首頁英雄區域 */
.hero-section {
    padding: 100px 0 80px;
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: #fff;
    margin-bottom: 60px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.hero-text {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.download-buttons {
    margin-top: 30px;
}

.download-buttons .btn {
    margin-right: 10px;
    margin-bottom: 10px;
    padding: 12px 25px;
}

.hero-image {
    max-height: 500px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    border-radius: 15px;
}

/* 功能特點區塊 */
.features-section {
    padding: 80px 0;
}

.section-title {
    margin-bottom: 50px;
    font-weight: 700;
    color: #333;
}

.feature-card {
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    font-weight: 600;
}

/* 下載頁面樣式 */
.download-page {
    padding: 60px 0;
}

.download-card {
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 30px;
}

.qr-codes {
    margin-top: 60px;
}

.qr-card {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.qr-image {
    max-width: 150px;
    margin: 0 auto 15px;
}

/* 頁腳樣式 */
.footer {
    background-color: #222;
    color: #fff;
    padding: 60px 0 30px;
}

.footer h5 {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer a.text-white {
    opacity: 0.8;
    transition: all 0.3s ease;
}

.footer a.text-white:hover {
    opacity: 1;
}

.social-icons a {
    font-size: 1.2rem;
    width: 35px;
    height: 35px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.social-icons a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

/* 響應式設計 */
@media (max-width: 991.98px) {
    .hero-section {
        padding: 60px 0 40px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-image {
        margin-top: 30px;
    }
}

@media (max-width: 767.98px) {
    .hero-section {
        padding: 40px 0 30px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .download-buttons .btn {
        display: block;
        width: 100%;
        margin-bottom: 10px;
    }
}