/* 
 * 麻雀風雲錄 - 開發者網站樣式
 * 設計風格：簡約、中式風格、響應式
 */

/* ===== 基礎設定 ===== */
:root {
    --color-primary: #2D5A3D;       /* 墨綠色 */
    --color-primary-light: #3D7A4D; /* 淺墨綠 */
    --color-background: #FAF8F5;    /* 米白色 */
    --color-paper: #FFFFFF;         /* 紙白色 */
    --color-text: #1A1A1A;          /* 墨黑色 */
    --color-text-secondary: #666666;/* 次要文字 */
    --color-accent-blue: #4A90A4;   /* 淡藍色 */
    --color-accent-gold: #B8860B;   /* 淡金色 */
    --color-border: #E5E5E5;        /* 邊框色 */
    
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
    --max-width: 1000px;
    --border-radius: 12px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 16px;
}

/* ===== 導航列 ===== */
.navbar {
    background-color: var(--color-paper);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

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

/* ===== Hero 區域 ===== */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    padding: 80px 24px;
    text-align: center;
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.hero .tagline {
    font-size: 20px;
    opacity: 0.9;
    margin-bottom: 32px;
}

.app-store-btn {
    display: inline-block;
    background-color: white;
    color: var(--color-primary);
    padding: 14px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.app-store-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* ===== 功能區域 ===== */
.features {
    padding: 80px 24px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.features h2 {
    text-align: center;
    font-size: 32px;
    color: var(--color-primary);
    margin-bottom: 48px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.feature-card {
    background-color: var(--color-paper);
    padding: 32px 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ===== 內容區域（隱私政策、支援頁面）===== */
.content-page {
    padding: 48px 24px;
    max-width: 800px;
    margin: 0 auto;
}

.content-page h1 {
    font-size: 32px;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.content-page .last-updated {
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-bottom: 32px;
}

.content-page h2 {
    font-size: 22px;
    color: var(--color-primary);
    margin-top: 32px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-border);
}

.content-page h3 {
    font-size: 18px;
    color: var(--color-text);
    margin-top: 24px;
    margin-bottom: 12px;
}

.content-page p {
    margin-bottom: 16px;
    color: var(--color-text-secondary);
}

.content-page ul, .content-page ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.content-page li {
    margin-bottom: 8px;
    color: var(--color-text-secondary);
}

.content-page a {
    color: var(--color-accent-blue);
    text-decoration: none;
}

.content-page a:hover {
    text-decoration: underline;
}

/* FAQ 樣式 */
.faq-item {
    background-color: var(--color-paper);
    border-radius: var(--border-radius);
    padding: 20px 24px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
}

.faq-item strong {
    color: var(--color-primary);
    display: block;
    margin-bottom: 8px;
}

/* 聯絡資訊卡片 */
.contact-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    padding: 32px;
    border-radius: var(--border-radius);
    margin: 32px 0;
    text-align: center;
}

.contact-card h3 {
    margin-bottom: 16px;
    color: white;
}

.contact-card a {
    color: white;
    font-size: 20px;
    font-weight: 600;
}

/* ===== 頁腳 ===== */
.footer {
    background-color: var(--color-paper);
    border-top: 1px solid var(--color-border);
    padding: 40px 24px;
    margin-top: 48px;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-copyright {
    color: var(--color-text-secondary);
    font-size: 13px;
}

/* ===== 響應式設計 ===== */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }
    
    .hero .tagline {
        font-size: 16px;
    }
    
    .navbar-content {
        flex-direction: column;
        gap: 16px;
    }
    
    .nav-links {
        gap: 16px;
    }
    
    .features h2 {
        font-size: 24px;
    }
    
    .content-page h1 {
        font-size: 26px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 16px;
    }
}

/* ===== 返回頂部按鈕 ===== */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background-color: var(--color-primary);
    color: white;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}