/* 基礎樣式 */
:root {
    --primary-color: #4a8f3c;
    --primary-dark: #3a752e;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #fff;
    --bg-light: #f9f9f9;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    padding-top: 80px; /* 為固定導航欄留出空間 */
}

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

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* 導航欄樣式 */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
    z-index: 1000;
    transform: translateY(0);
    transition: transform 0.3s ease-in-out;
}

.main-nav.hidden {
    transform: translateY(-100%);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    padding: 5px 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.donate-btn {
    background-color: var(--primary-color);
    color: white !important;
    padding: 8px 20px !important;
    border-radius: 50px;
    margin-left: 10px;
    transition: var(--transition);
}

.donate-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.donate-btn::after {
    display: none;
}

.language-switcher {
    display: flex;
    margin-left: 15px;
    border-left: 1px solid #eee;
    padding-left: 15px;
}

.language-switcher a {
    font-size: 0.9rem;
    color: var(--text-light);
    padding: 0 5px;
}

.language-switcher a.active {
    color: var(--primary-color);
    font-weight: 600;
}

/* 漢堡選單按鈕 */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-color);
    margin: 5px 0;
    transition: var(--transition);
}

/* 新聞卡片樣式 */
.news-section {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.news-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.news-date {
    background-color: var(--primary-color);
    color: white;
    padding: 5px 15px;
    display: inline-block;
    border-radius: 0 0 10px 0;
    font-size: 0.9rem;
}

.news-card h2 {
    font-size: 1.5rem;
    margin: 20px 20px 10px;
    color: var(--text-color);
}

.news-card p {
    color: var(--text-light);
    margin: 0 20px 20px;
    line-height: 1.6;
}

.read-more {
    display: inline-block;
    margin: 0 20px 20px;
    color: var(--primary-color);
    font-weight: 500;
}

.read-more i {
    margin-left: 5px;
    transition: var(--transition);
}

.read-more:hover i {
    transform: translateX(5px);
}

/* 頁腳樣式 */
footer {
    background-color: #2c3e50;
    color: white;
    padding: 50px 0 20px;
    margin-top: 80px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-section {
    flex: 1;
    min-width: 250px;
    margin-bottom: 30px;
}

.footer-section h3 {
    color: white;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-section p {
    margin-bottom: 10px;
    color: #ecf0f1;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    margin-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 響應式設計 */
@media (max-width: 992px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px 5%;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        transform: translateY(-150%);
        transition: transform 0.3s ease-in-out;
        z-index: 999;
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .nav-links a {
        padding: 10px 0;
        width: 100%;
    }

    .donate-btn {
        margin: 10px 0 0;
        display: block;
        text-align: center;
    }

    .language-switcher {
        margin: 15px 0 0;
        padding: 15px 0 0;
        border-left: none;
        border-top: 1px solid #eee;
        width: 100%;
        justify-content: flex-start;
    }

    .hamburger {
        display: block;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

@media (max-width: 768px) {
    .news-section {
        grid-template-columns: 1fr;
    }
    
    .footer-section {
        min-width: 100%;
    }
}

/* 暗黑模式 */
@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #f0f0f0;
        --text-light: #b0b0b0;
        --bg-color: #121212;
        --bg-light: #1e1e1e;
    }
    
    body {
        background-color: var(--bg-color);
    }
    
    .main-nav {
        background-color: rgba(30, 30, 30, 0.98);
    }
    
    .nav-links a {
        color: var(--text-color);
    }
    
    .news-card {
        background-color: var(--bg-light);
    }
    
    .news-card h2 {
        color: var(--text-color);
    }
    
    .news-card p {
        color: var(--text-light);
    }
    
    @media (max-width: 992px) {
        .nav-links {
            background-color: var(--bg-light);
        }
    }
}