/* 北投火山網站 - 全域樣式 */
:root {
    --primary: #8B0000;
    --secondary: #D2691E;
    --accent: #FF6347;
    --bg: #1a1a2e;
    --card-bg: #16213e;
    --text: #e0e0e0;
    --text-light: #a0a0a0;
    --volcano-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', sans-serif;
    background: var(--volcano-gradient);
    color: var(--text);
    line-height: 1.8;
    min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; transition: 0.3s; }
a:hover { color: #fff; }
img { max-width: 100%; border-radius: 12px; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 導航列 */
nav {
    background: rgba(22, 33, 62, 0.95);
    border-bottom: 2px solid var(--primary);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}
nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}
.logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.logo-icon { font-size: 2rem; }
.nav-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    list-style: none;
}
.nav-links a {
    color: var(--text);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-size: 0.95rem;
    transition: all 0.3s;
}
.nav-links a:hover, .nav-links a.active {
    background: var(--primary);
    color: #fff;
}

/* 頁首 */
.hero {
    text-align: center;
    padding: 5rem 1rem 3rem;
    background: radial-gradient(ellipse at center top, rgba(139,0,0,0.3) 0%, transparent 70%);
}
.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    color: var(--accent);
    text-shadow: 0 0 40px rgba(255,99,71,0.5);
    margin-bottom: 1rem;
}
.hero .subtitle {
    font-size: 1.3rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 2rem;
}
.hero-badge {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 0.4rem 1.2rem;
    border-radius: 50px;
    font-size: 0.9rem;
    margin: 0.3rem;
}
.hero-visual {
    margin: 3rem auto;
    max-width: 900px;
    height: 300px;
    background: linear-gradient(180deg, #2d1b1b 0%, #8B0000 40%, #D2691E 70%, #2d1b1b 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(139,0,0,0.4);
}
.hero-visual::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,99,71,0.2) 0%, transparent 50%);
    animation: pulse 4s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(0.8); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 1; }
}

/* 特色卡片 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 3rem 0;
}
.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid rgba(255,99,71,0.15);
    transition: all 0.3s;
    cursor: pointer;
}
.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(255,99,71,0.2);
}
.card-icon { font-size: 3rem; margin-bottom: 1rem; }
.card h3 { color: var(--accent); margin-bottom: 0.8rem; font-size: 1.3rem; }
.card p { color: var(--text-light); font-size: 0.95rem; }
.card-tags { margin-top: 1rem; display: flex; gap: 0.5rem; flex-wrap: wrap; }
.tag {
    background: rgba(139,0,0,0.3);
    color: #fff;
    padding: 0.25rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

/* 內容區塊 */
.section { padding: 3rem 0; }
.section-title {
    text-align: center;
    margin-bottom: 2rem;
}
.section-title h2 {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}
.section-title p { color: var(--text-light); }

/* 麵包屑 */
.breadcrumb {
    padding: 1rem 0;
    font-size: 0.9rem;
    color: var(--text-light);
}
.breadcrumb a { color: var(--accent); }

/* 內容文章 */
.article-content h2 {
    color: var(--accent);
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    border-left: 4px solid var(--primary);
    padding-left: 1rem;
}
.article-content h3 {
    color: #fff;
    font-size: 1.3rem;
    margin: 1.5rem 0 0.8rem;
}
.article-content p {
    margin-bottom: 1rem;
    color: var(--text-light);
    text-align: justify;
}
.article-content ul {
    margin: 1rem 0 1rem 2rem;
    color: var(--text-light);
}
.article-content li { margin-bottom: 0.5rem; }
.info-box {
    background: rgba(139,0,0,0.15);
    border-left: 4px solid var(--accent);
    padding: 1.5rem;
    border-radius: 0 12px 12px 0;
    margin: 1.5rem 0;
}
.info-box h4 { color: var(--accent); margin-bottom: 0.5rem; }

/* 數據卡片 */
.data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}
.data-item {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(255,99,71,0.1);
}
.data-item .num {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--accent);
}
.data-item .label { color: var(--text-light); margin-top: 0.5rem; }

/* 連結卡片 */
.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}
.link-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid rgba(255,99,71,0.1);
    transition: all 0.3s;
}
.link-card:hover {
    border-color: var(--accent);
    background: rgba(255,99,71,0.05);
}
.link-card .icon { font-size: 2.5rem; }
.link-card h4 { color: var(--accent); margin-bottom: 0.3rem; }
.link-card p { color: var(--text-light); font-size: 0.9rem; }

/* 返回按鈕 */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
    padding: 0.8rem 1.5rem;
    border: 1px solid var(--accent);
    border-radius: 8px;
    margin-top: 2rem;
    transition: all 0.3s;
}
.back-btn:hover {
    background: var(--accent);
    color: #fff;
}

/* 頁尾 */
footer {
    background: rgba(10, 10, 20, 0.8);
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
    border-top: 1px solid rgba(255,99,71,0.2);
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 響應式 */
@media (max-width: 768px) {
    nav .container { justify-content: center; }
    .nav-links { justify-content: center; }
    .hero { padding: 3rem 1rem 2rem; }
    .hero-visual { height: 200px; font-size: 4rem; }
}