/* CSS 變數定義 - 顏色系統 */
:root {
    /* 主色系 - #9ED3DC 淺藍綠色 */
    --primary-color: #9ED3DC;
    --primary-light: #C5E8ED;
    --primary-dark: #6BA6AF;
    --primary-darker: #4A7C82;
    
    /* 語意色彩 */
    --success-color: #52C41A;
    --success-light: #B7EB8F;
    --error-color: #FF4D4F;
    --error-light: #FFCCC7;
    --warning-color: #FAAD14;
    --warning-light: #FFE58F;
    
    /* 中性色 */
    --text-primary: #1A1A1A;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-tertiary: #F0F2F5;
    --border-color: #E8E8E8;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* 字體設定 */
    --font-family: 'Noto Sans TC', 'Microsoft JhengHei', '微軟正黑體', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    --font-weight-black: 900;
    
    /* 字級階層 */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* 間距系統 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圓角系統 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 50px;
    
    /* 陰影系統 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    
    /* 動畫時間 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 全域樣式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基礎設定 */
body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.7;
    color: var(--text-primary);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* 導覽列樣式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo h1 {
    font-size: var(--font-size-xl);
    color: var(--primary-dark);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-normal);
    position: relative;
    padding: var(--spacing-sm) 0;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-link:hover::after {
    width: 100%;
}

/* 漢堡選單 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主橫幅樣式 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 0 20px;
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

/* 英雄區背景裝飾 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    flex: 1;
    color: white;
    max-width: 600px;
}

.hero-content h2 {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
    letter-spacing: -1px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-content p {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-normal);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.95;
    line-height: 1.6;
}

.cta-button {
    background: var(--bg-primary);
    color: var(--primary-dark);
    border: 2px solid var(--bg-primary);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-light);
    transition: left var(--transition-normal);
    z-index: -1;
}

.cta-button:hover {
    color: var(--bg-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    border-color: var(--bg-primary);
}

.cta-button:hover::before {
    left: 0;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.placeholder-image {
    font-size: 10rem;
    color: rgba(255, 255, 255, 0.8);
    transition: all var(--transition-normal);
}

.hero:hover .placeholder-image {
    transform: scale(1.05);
    color: rgba(255, 255, 255, 0.9);
}

/* 通用區塊樣式 */
.section {
    padding: 80px 0;
}

.alt-bg {
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-3xl);
    color: var(--primary-dark);
    position: relative;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-full);
}

/* 關於我們樣式 */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 20px;
    line-height: 1.8;
    color: #555;
}

.about-stats {
    display: grid;
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary-color), var(--primary-dark));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-item h3 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -1px;
}

.stat-item p {
    color: #666;
    font-weight: 500;
}

/* 使命願景樣式 */
.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.mission-card {
    background: var(--bg-primary);
    padding: var(--spacing-3xl) var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.mission-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary-color), var(--primary-dark));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.mission-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.mission-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
    transition: all var(--transition-normal);
}

.mission-card:hover .card-icon {
    color: var(--primary-dark);
    transform: scale(1.1);
}

.mission-card h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-md);
    color: var(--primary-dark);
    letter-spacing: -0.5px;
}

.mission-card p {
    color: #666;
    line-height: 1.6;
}

/* 活動項目樣式 */
.activities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.activity-item {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
}

.activity-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary-color), var(--primary-dark));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.activity-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.activity-item:hover::before {
    transform: scaleX(1);
}

.activity-image {
    height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.activity-image .placeholder-image {
    font-size: 4rem;
    color: var(--primary-light);
    transition: all var(--transition-normal);
}

.activity-item:hover .placeholder-image {
    color: var(--primary-color);
    transform: scale(1.05);
}

/* 活動圖片方形樣式 */
.activity-image img {
    width: 100%;
    height: 100%;
    border-radius: 0;
    object-fit: cover;
    background-color: transparent;
}

/* 平森嚴選圖片特定樣式 - 移除底色 */
.activity-item:nth-child(3) .activity-image img {
    object-fit: contain;
    background-color: transparent;
    padding: 10px;
}

.activity-content {
    padding: 25px;
}

.activity-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: #333;
}

.activity-content p {
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
}

.activity-tag {
    display: inline-block;
    background: var(--primary-color);
    color: var(--bg-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-normal);
}

.activity-tag:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

/* 聯絡我們樣式 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: grid;
    gap: 30px;
}

.contact-item h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-dark);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.contact-item h3 i {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    transition: color var(--transition-normal);
}

.contact-item:hover h3 i {
    color: var(--primary-dark);
}

.contact-item p {
    color: #666;
    font-size: 1.1rem;
}

.contact-form {
    background: var(--bg-primary);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
    font-family: inherit;
    background: var(--bg-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(158, 211, 220, 0.1);
}

.submit-btn {
    width: 100%;
    background: var(--primary-color);
    color: var(--bg-primary);
    border: none;
    padding: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-dark);
    transition: left var(--transition-normal);
    z-index: -1;
}

.submit-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.submit-btn:hover::before {
    left: 0;
}

/* 頁尾樣式 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: #ecf0f1;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

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

.social-link {
    background: #34495e;
    padding: 10px 15px;
    border-radius: 5px;
    transition: background 0.3s ease;
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 50px 20px;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

    .hero-image {
        margin-top: 30px;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .mission-grid {
        grid-template-columns: 1fr;
    }

    .activities-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr;
    }

    .logo h1 {
        font-size: 1.2rem;
    }

    .hero-content h2 {
        font-size: 1.5rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }
}

/* 動畫效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 滾動條樣式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}