/* 全国天气预报 - 主样式 */
:root {
    --primary: #0EA5E9;
    --primary-light: #38BDF8;
    --primary-dark: #0284C7;
    --primary-bg: #f0f9ff;
    --bg: #f0f4f8;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; }

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

/* Navigation */
.main-header { position: sticky; top: 0; z-index: 100; }
.main-nav { background: white; box-shadow: 0 1px 4px rgba(0,0,0,0.08); }
.nav-container { display: flex; align-items: center; height: 60px; gap: 24px; }
.nav-brand { display: flex; align-items: center; gap: 8px; font-size: 1.2rem; font-weight: 700; color: var(--primary); white-space: nowrap; }
.nav-brand i { font-size: 1.4rem; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.3rem; color: var(--text); cursor: pointer; }
.nav-list { display: flex; align-items: center; gap: 4px; list-style: none; flex: 1; justify-content: center; }
.nav-link { display: block; padding: 8px 14px; color: var(--text); font-size: 0.9rem; font-weight: 500; border-bottom: 2px solid transparent; transition: var(--transition); white-space: nowrap; }
.nav-link:hover, .nav-link.active { color: var(--primary); border-bottom-color: var(--primary); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-search { display: flex; align-items: center; background: var(--primary-bg); border-radius: 20px; overflow: hidden; }
.nav-search input { border: none; background: transparent; padding: 6px 14px; font-size: 0.85rem; width: 180px; outline: none; }
.nav-search button { background: none; border: none; padding: 6px 12px; color: var(--primary); cursor: pointer; }
.nav-login { display: flex; align-items: center; gap: 4px; padding: 6px 14px; background: var(--primary); color: white !important; border-radius: 20px; font-size: 0.85rem; font-weight: 500; }
.nav-login:hover { background: var(--primary-dark); color: white !important; }
.nav-user { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--text-light); }
.nav-logout { color: var(--text-muted); margin-left: 4px; }

/* Hero Carousel */
.hero-carousel { position: relative; width: 100%; height: 400px; overflow: hidden; margin-bottom: 32px; }
.carousel-inner { position: relative; width: 100%; height: 100%; }
.carousel-slide { position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 0; transition: opacity 0.8s ease; pointer-events: none; }
.carousel-slide.active { opacity: 1; pointer-events: auto; z-index: 1; }
.slide-bg { width: 100%; height: 100%; background-size: cover; background-position: center; background-color: var(--primary-dark); }
.slide-overlay { position: absolute; bottom: 0; left: 0; right: 0; padding: 60px 0 40px; background: linear-gradient(transparent, rgba(0,0,0,0.7)); color: white; }
.slide-title { font-size: 1.8rem; font-weight: 700; margin-bottom: 8px; }
.slide-title a { color: white; }
.slide-excerpt { font-size: 0.95rem; opacity: 0.9; max-width: 600px; }
.carousel-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 5; background: rgba(255,255,255,0.3); backdrop-filter: blur(4px); border: none; color: white; width: 44px; height: 44px; border-radius: 50%; font-size: 1.1rem; cursor: pointer; transition: var(--transition); }
.carousel-arrow:hover { background: rgba(255,255,255,0.5); }
.carousel-prev { left: 16px; }
.carousel-next { right: 16px; }
.carousel-dots { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); z-index: 5; display: flex; gap: 8px; }
.carousel-dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.5); cursor: pointer; transition: var(--transition); }
.carousel-dot.active { background: white; width: 24px; border-radius: 5px; }

/* Three Column Layout */
.content-layout.three-column { display: grid; grid-template-columns: 240px 1fr 240px; gap: 24px; margin: 24px 0; }
.layout-left { order: 1; }
.layout-main { order: 2; }
.layout-right { order: 3; }

/* Section Header */
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 2px solid var(--primary); }
.section-title { font-size: 1.3rem; font-weight: 700; color: var(--text); }

/* Article Grid */
.article-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.article-card { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: var(--transition); }
.article-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.article-card-image { position: relative; overflow: hidden; }
.article-card-image img { width: 100%; height: 200px; object-fit: cover; transition: transform 0.3s; }
.article-card:hover .article-card-image img { transform: scale(1.05); }
.category-badge { position: absolute; bottom: 10px; left: 10px; display: inline-block; padding: 3px 10px; background: var(--primary); color: white !important; font-size: 0.75rem; font-weight: 600; border-radius: 4px; }
.article-card-content { padding: 14px 16px; }
.article-card-title { font-size: 1rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.article-card-title a { color: var(--text); }
.article-card-title a:hover { color: var(--primary); }
.article-card-excerpt { color: var(--text-light); font-size: 0.85rem; line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-card-footer { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-muted); }
.article-card-footer i { margin-right: 2px; }

/* Sidebar */
.sidebar-widget { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; margin-bottom: 20px; }
.widget-header { margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--primary-bg); }
.widget-header h2 { font-size: 1.05rem; font-weight: 700; color: var(--text); }
.widget-header h2 i { color: var(--primary); margin-right: 6px; }
.hot-list { display: flex; flex-direction: column; }
.hot-item { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px solid #f8fafc; color: var(--text); text-decoration: none; transition: var(--transition); }
.hot-item:last-child { border-bottom: none; }
.hot-item:hover { color: var(--primary); }
.hot-rank { width: 22px; height: 22px; display: flex; align-items: center; justify-content: center; border-radius: 4px; font-size: 0.75rem; font-weight: 700; background: #f1f5f9; color: var(--text-muted); flex-shrink: 0; }
.hot-rank.rank-1 { background: #fef3c7; color: #d97706; }
.hot-rank.rank-2 { background: #e0e7ff; color: #4f46e5; }
.hot-rank.rank-3 { background: #fce7f3; color: #db2777; }
.hot-info { flex: 1; min-width: 0; }
.hot-title { display: block; font-size: 0.85rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hot-views { font-size: 0.75rem; color: var(--text-muted); }
.tags-wrap { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-item { display: inline-block; padding: 4px 12px; background: #e0f2fe; color: var(--primary-dark) !important; border-radius: 14px; font-size: 0.8rem; transition: var(--transition); }
.tag-item:hover { background: var(--primary); color: white !important; }

/* Page Header */
.page-header { text-align: center; padding: 32px 0 16px; }
.page-header h1 { font-size: 1.6rem; color: var(--text); margin-bottom: 8px; }
.page-description { color: var(--text-light); }
.page-count { color: var(--text-muted); font-size: 0.9rem; margin-top: 4px; }

/* Breadcrumb */
.breadcrumb { padding: 16px 0; font-size: 0.85rem; color: var(--text-muted); }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep { margin: 0 8px; }

/* Article Detail */
.article-detail { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 32px; }
.article-header { margin-bottom: 24px; }
.article-title { font-size: 1.6rem; font-weight: 700; line-height: 1.4; margin-bottom: 12px; }
.article-meta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 0.85rem; color: var(--text-muted); }
.article-meta .category-badge { position: static; }
.meta-item i { margin-right: 4px; }
.article-cover { margin-bottom: 24px; }
.article-cover img { width: 100%; border-radius: var(--radius-sm); max-height: 500px; object-fit: cover; }
.article-content { line-height: 1.8; font-size: 1rem; color: #334155; }
.article-content h2 { font-size: 1.3rem; margin: 28px 0 14px; padding-left: 12px; border-left: 4px solid var(--primary); }
.article-content h3 { font-size: 1.1rem; margin: 20px 0 10px; }
.article-content p { margin-bottom: 14px; }
.article-content img { border-radius: var(--radius-sm); margin: 16px auto; display: block; }
.article-content blockquote { border-left: 4px solid var(--primary); padding: 12px 20px; margin: 16px 0; background: var(--primary-bg); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.article-content ul, .article-content ol { margin: 12px 0; padding-left: 24px; }
.article-content li { margin-bottom: 6px; }
.article-tags { margin: 24px 0; padding: 16px 0; border-top: 1px solid var(--border); }
.tags-label { color: var(--text-muted); margin-right: 8px; }
.article-actions { display: flex; gap: 12px; padding: 20px 0; border-top: 1px solid var(--border); }
.action-btn { padding: 8px 20px; border: 1px solid var(--border); border-radius: 20px; background: white; cursor: pointer; font-size: 0.85rem; color: var(--text-light); transition: var(--transition); }
.action-btn:hover { border-color: var(--primary); color: var(--primary); }
.btn-like.liked { background: #fef2f2; color: #ef4444; border-color: #fecaca; }
.article-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 20px 0; border-top: 1px solid var(--border); }
.article-nav a { display: block; padding: 12px; background: var(--primary-bg); border-radius: var(--radius-sm); color: var(--text); transition: var(--transition); }
.article-nav a:hover { background: #e0f2fe; }
.nav-label { font-size: 0.8rem; color: var(--primary); display: block; margin-bottom: 4px; }
.nav-title { font-size: 0.9rem; }
.nav-none { color: var(--text-muted); font-size: 0.85rem; }
.related-articles { margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--border); }
.related-title { font-size: 1.1rem; margin-bottom: 16px; }
.related-title i { color: var(--primary); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.related-card { border-radius: var(--radius-sm); overflow: hidden; background: var(--primary-bg); }
.related-card-image img { width: 100%; height: 120px; object-fit: cover; }
.related-card-title { padding: 8px 10px; font-size: 0.85rem; color: var(--text); }

/* Pagination */
.pagination { display: flex; justify-content: center; align-items: center; gap: 6px; padding: 24px 0; flex-wrap: wrap; }
.page-link { display: inline-flex; align-items: center; justify-content: center; min-width: 36px; height: 36px; padding: 0 10px; border-radius: var(--radius-sm); font-size: 0.85rem; color: var(--text-light); background: var(--card-bg); border: 1px solid var(--border); transition: var(--transition); }
.page-link:hover { border-color: var(--primary); color: var(--primary); }
.page-link.active { background: var(--primary); color: white; border-color: var(--primary); }
.page-dots { color: var(--text-muted); }

/* Auth Pages */
.auth-page { display: flex; justify-content: center; padding: 48px 0; }
.auth-card { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 40px; max-width: 420px; width: 100%; }
.auth-card h2 { text-align: center; color: var(--primary); margin-bottom: 6px; font-size: 1.4rem; }
.auth-subtitle { text-align: center; color: var(--text-muted); margin-bottom: 24px; }
.auth-link { text-align: center; margin-top: 16px; font-size: 0.9rem; color: var(--text-light); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.9rem; color: var(--text); }
.form-control { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 0.9rem; transition: var(--transition); }
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(14,165,233,0.15); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 24px; border: none; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: var(--transition); }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-block { width: 100%; }

/* Alerts */
.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: 0.9rem; }
.alert-error { background: #fef2f2; color: #dc2626; border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: #16a34a; border: 1px solid #bbf7d0; }

/* Search Form */
.search-form-large { display: flex; max-width: 500px; margin: 16px auto 0; }
.search-form-large input { flex: 1; padding: 12px 20px; border: 2px solid var(--border); border-radius: var(--radius-sm) 0 0 var(--radius-sm); font-size: 1rem; }
.search-form-large input:focus { outline: none; border-color: var(--primary); }
.search-form-large button { padding: 12px 24px; background: var(--primary); color: white; border: none; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: 1rem; cursor: pointer; }

/* Error Page */
.error-page { text-align: center; padding: 80px 0; }
.error-page i { font-size: 4rem; color: var(--primary); margin-bottom: 16px; }
.error-page h1 { font-size: 5rem; color: var(--primary); }
.error-page h2 { color: var(--text); margin-bottom: 12px; }
.error-page p { color: var(--text-light); margin-bottom: 24px; }

/* Empty State */
.empty-state { text-align: center; padding: 48px 0; color: var(--text-muted); }
.empty-state i { font-size: 3rem; margin-bottom: 12px; display: block; }

/* Footer */
.site-footer { background: #1e293b; color: #94a3b8; margin-top: 48px; padding: 40px 0 20px; }
.footer-content { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; margin-bottom: 24px; }
.footer-info h3 { color: white; font-size: 1.1rem; margin-bottom: 8px; }
.footer-info h3 i { color: var(--primary-light); margin-right: 6px; }
.footer-info p { font-size: 0.85rem; line-height: 1.6; }
.footer-links h4 { color: #cbd5e1; font-size: 0.9rem; margin-bottom: 12px; }
.footer-links a { display: block; color: #94a3b8; font-size: 0.85rem; padding: 3px 0; }
.footer-links a:hover { color: var(--primary-light); }
.footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid #334155; font-size: 0.8rem; }

/* Responsive */
@media (max-width: 1024px) {
    .content-layout.three-column { grid-template-columns: 1fr; }
    .layout-left { order: 3; }
    .layout-right { order: 2; }
    .layout-main { order: 1; }
    .footer-content { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-list { display: none; position: absolute; top: 60px; left: 0; right: 0; background: white; flex-direction: column; padding: 12px; box-shadow: var(--shadow-lg); z-index: 99; }
    .nav-list.open { display: flex; }
    .nav-right { display: none; }
    .nav-search { display: none; }
    .hero-carousel { height: 250px; }
    .slide-title { font-size: 1.2rem; }
    .article-grid { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr 1fr; }
    .article-detail { padding: 20px; }
    .article-nav { grid-template-columns: 1fr; }
}