@charset "utf-8";
/*
 * AURORA —— 现代浅色资讯门户模板
 * 版面：浅色吸顶导航 + 通栏 Hero + 四宫格特色卡 + 栏目卡片网格
 *       + 编辑推荐卡片 + 资讯列表 + 排行侧栏 + 标签云 + 多列页脚
 * 依赖：Bootstrap 5 / Font Awesome 6
 */

/* ==================== 1. 设计变量 ==================== */
:root {
    --aurora-bg:       #f5f7fa;
    --aurora-bg-alt:   #eef2f7;
    --aurora-white:    #ffffff;
    --aurora-surface:  #ffffff;

    --aurora-primary:    #1a73e8;
    --aurora-primary-d:  #1557b0;
    --aurora-primary-l:  #4dabf7;
    --aurora-secondary:  #ff6b35;
    --aurora-accent:     #ff6b35;

    --aurora-text:       #1a1a2e;
    --aurora-text-2:     #4a5568;
    --aurora-muted:      #8896a6;
    --aurora-line:       #e2e8f0;
    --aurora-line-2:     #d1d9e6;

    --aurora-radius:     12px;
    --aurora-radius-sm:  8px;
    --aurora-shadow:     0 2px 12px rgba(0, 0, 0, .06);
    --aurora-shadow-lg:  0 8px 30px rgba(0, 0, 0, .1);
}

/* ==================== 2. 基础 ==================== */
body {
    background: var(--aurora-bg);
    color: var(--aurora-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--aurora-text); text-decoration: none; transition: color .2s; }
a:hover { color: var(--aurora-primary); }

h1, h2, h3, h4, h5, h6 { font-weight: 700; letter-spacing: .2px; color: var(--aurora-text); }
img { max-width: 100%; }
ul, ol { list-style: none; padding: 0; margin: 0; }

.aurora-container { max-width: 1200px; }
.aurora-muted { color: var(--aurora-muted) !important; }
.aurora-accent { color: var(--aurora-accent) !important; }

.aurora-clamp-1 { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: block; }
.aurora-clamp-2, .aurora-clamp-3 { display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden; }
.aurora-clamp-2 { -webkit-line-clamp: 2; }
.aurora-clamp-3 { -webkit-line-clamp: 3; }
.min-w-0 { min-width: 0; }

/* 通用区块 */
.aurora-section { padding: 60px 0; }
.aurora-section-alt { background: var(--aurora-bg-alt); }

.aurora-section-title { text-align: center; margin-bottom: 42px; }
.aurora-section-title .sub {
    display: inline-block; font-size: 13px; letter-spacing: 2px; text-transform: uppercase;
    color: var(--aurora-primary); margin-bottom: 8px; font-weight: 600;
}
.aurora-section-title h2 { font-size: 1.85rem; margin: 0 0 12px; }
.aurora-section-title p { color: var(--aurora-muted); font-size: 15px; max-width: 760px; margin: 0 auto; }
.aurora-section-title .line {
    width: 60px; height: 3px; margin: 14px auto 0; border-radius: 3px;
    background: linear-gradient(to right, var(--aurora-primary), var(--aurora-primary-l));
}

/* 按钮 */
.aurora-btn, .aurora-btn-outline {
    display: inline-flex; align-items: center; gap: 8px;
    padding: .62rem 1.5rem; border-radius: 999px;
    font-weight: 600; font-size: 15px; transition: .25s; white-space: nowrap;
}
.aurora-btn {
    background: linear-gradient(135deg, var(--aurora-primary), var(--aurora-primary-l));
    color: #fff; border: 0;
}
.aurora-btn:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(26, 115, 232, .3); }
.aurora-btn-outline { border: 1px solid var(--aurora-line-2); color: var(--aurora-text); background: var(--aurora-white); }
.aurora-btn-outline:hover { border-color: var(--aurora-primary); color: var(--aurora-primary); transform: translateY(-2px); }

/* ==================== 3. 头部导航 ==================== */
.aurora-header {
    background: var(--aurora-white);
    box-shadow: var(--aurora-shadow);
    z-index: 1030;
}

.aurora-topbar {
    background: var(--aurora-text);
    color: rgba(255,255,255,.7);
    font-size: 13px;
    padding: 6px 0;
}
.aurora-topbar a { color: rgba(255,255,255,.7); }
.aurora-topbar a:hover { color: #fff; }
.aurora-topbar .aurora-container { display: flex; justify-content: space-between; align-items: center; }
.aurora-topbar-links { display: flex; gap: 16px; }

.aurora-navbar { padding: 0; }
.aurora-navbar .navbar-brand {
    font-size: 1.35rem; font-weight: 800; color: var(--aurora-primary);
    padding: 14px 0; letter-spacing: -.5px;
}
.aurora-navbar .navbar-brand i { color: var(--aurora-secondary); }

.aurora-navbar .nav-link {
    font-size: 15px; font-weight: 500; color: var(--aurora-text-2);
    padding: 18px 16px !important; transition: .2s; position: relative;
}
.aurora-navbar .nav-link:hover,
.aurora-navbar .nav-link.active {
    color: var(--aurora-primary);
}
.aurora-navbar .nav-link.active::after {
    content: ''; position: absolute; bottom: 0; left: 16px; right: 16px;
    height: 3px; background: var(--aurora-primary); border-radius: 3px 3px 0 0;
}

.aurora-navbar .dropdown-menu {
    border: 0; box-shadow: var(--aurora-shadow-lg); border-radius: var(--aurora-radius-sm);
    padding: 8px 0; min-width: 160px;
}
.aurora-navbar .dropdown-item {
    font-size: 14px; padding: 8px 20px; color: var(--aurora-text-2);
}
.aurora-navbar .dropdown-item:hover { background: var(--aurora-bg); color: var(--aurora-primary); }

.aurora-search-toggle {
    background: none; border: 1px solid var(--aurora-line); border-radius: 50%;
    width: 38px; height: 38px; display: flex; align-items: center; justify-content: center;
    color: var(--aurora-muted); cursor: pointer; transition: .2s;
}
.aurora-search-toggle:hover { border-color: var(--aurora-primary); color: var(--aurora-primary); }

.aurora-search-bar {
    background: var(--aurora-bg);
    padding: 12px 0;
    border-top: 1px solid var(--aurora-line);
}
.aurora-search-form .input-group,
.aurora-search-form-lg .input-group { max-width: 600px; }
.aurora-search-form .form-control,
.aurora-search-form-lg .form-control {
    border: 1px solid var(--aurora-line); border-radius: var(--aurora-radius-sm) 0 0 var(--aurora-radius-sm);
}
.aurora-search-form .btn,
.aurora-search-form-lg .btn {
    background: var(--aurora-primary); color: #fff; border: 0;
    border-radius: 0 var(--aurora-radius-sm) var(--aurora-radius-sm) 0;
    padding: 0 20px;
}
.aurora-search-form .btn:hover,
.aurora-search-form-lg .btn:hover { background: var(--aurora-primary-d); }

/* ==================== 4. Hero 首屏 ==================== */
.aurora-hero {
    background: linear-gradient(135deg, #e8f0fe 0%, #f5f7fa 50%, #fff5f0 100%);
    padding: 70px 0 60px;
}
.aurora-hero h1 { font-size: 2.5rem; line-height: 1.3; }
.aurora-hero h1 em { font-style: normal; color: var(--aurora-primary); }
.aurora-hero .lead { color: var(--aurora-text-2); font-size: 16px; }
.aurora-hero-sub {
    display: inline-block; font-size: 13px; letter-spacing: 2px; text-transform: uppercase;
    color: var(--aurora-primary); margin-bottom: 12px; font-weight: 600;
}
.aurora-hero-sub i { margin-right: 6px; }
.aurora-hero-buttons { display: flex; gap: 12px; flex-wrap: wrap; }
.aurora-hero-visual img { max-width: 420px; width: 100%; }

/* ==================== 5. 特色卡片 ==================== */
.aurora-feature-card {
    background: var(--aurora-white);
    border-radius: var(--aurora-radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--aurora-shadow);
    transition: .3s;
    height: 100%;
}
.aurora-feature-card:hover { transform: translateY(-4px); box-shadow: var(--aurora-shadow-lg); }
.aurora-feature-card .icon {
    width: 56px; height: 56px; border-radius: 14px; margin: 0 auto 16px;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--aurora-primary), var(--aurora-primary-l));
    color: #fff; font-size: 22px;
}
.aurora-feature-card h3 { font-size: 17px; margin-bottom: 8px; }
.aurora-feature-card p { color: var(--aurora-muted); font-size: 14px; margin-bottom: 0; }

/* ==================== 6. 通用盒子 ==================== */
.aurora-box {
    background: var(--aurora-white);
    border-radius: var(--aurora-radius);
    box-shadow: var(--aurora-shadow);
    overflow: hidden;
}
.aurora-box-head {
    padding: 16px 24px;
    border-bottom: 1px solid var(--aurora-line);
    display: flex; align-items: center; justify-content: space-between;
}
.aurora-box-head h1 { font-size: 20px; margin: 0; }
.aurora-box-head h3 { font-size: 16px; margin: 0; }
.aurora-box-head .more { font-size: 13px; color: var(--aurora-muted); white-space: nowrap; }
.aurora-box-head .more:hover { color: var(--aurora-primary); }
.aurora-box-body { padding: 24px; }

/* ==================== 7. 文章卡片 ==================== */
.aurora-card {
    background: var(--aurora-white);
    border-radius: var(--aurora-radius);
    box-shadow: var(--aurora-shadow);
    overflow: hidden;
    transition: .3s;
    height: 100%;
}
.aurora-card:hover { transform: translateY(-3px); box-shadow: var(--aurora-shadow-lg); }
.aurora-card-thumb {
    display: block; position: relative; overflow: hidden;
    aspect-ratio: 16 / 10;
}
.aurora-card-thumb img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform .4s;
}
.aurora-card:hover .aurora-card-thumb img { transform: scale(1.05); }
.aurora-card-body { padding: 16px; }
.aurora-card-body h3 { font-size: 15px; margin-bottom: 8px; line-height: 1.5; }
.aurora-card-body h3 a:hover { color: var(--aurora-primary); }
.aurora-card-body .desc { font-size: 13px; color: var(--aurora-muted); margin-bottom: 8px; }

/* ==================== 8. 文章列表项 ==================== */
.aurora-list-item {
    display: flex; gap: 16px; padding: 20px 0;
    border-bottom: 1px solid var(--aurora-line);
}
.aurora-list-item:last-child { border-bottom: 0; }
.aurora-list-thumb {
    flex-shrink: 0; width: 180px; height: 120px; border-radius: var(--aurora-radius-sm);
    overflow: hidden;
}
.aurora-list-thumb img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform .4s;
}
.aurora-list-item:hover .aurora-list-thumb img { transform: scale(1.05); }
.aurora-list-content { flex: 1; min-width: 0; display: flex; flex-direction: column; justify-content: center; }
.aurora-list-content h3 { font-size: 16px; margin-bottom: 6px; line-height: 1.5; }
.aurora-list-content h3 a:hover { color: var(--aurora-primary); }
.aurora-list-content .desc { font-size: 13px; color: var(--aurora-muted); margin-bottom: 8px; }

/* 元信息 */
.aurora-meta { display: flex; flex-wrap: wrap; gap: 14px; font-size: 13px; color: var(--aurora-muted); }
.aurora-meta i { margin-right: 4px; }
.aurora-meta a { color: var(--aurora-muted); }
.aurora-meta a:hover { color: var(--aurora-primary); }

/* ==================== 9. 栏目卡片 ==================== */
.aurora-cate-card {
    background: var(--aurora-white);
    border-radius: var(--aurora-radius);
    box-shadow: var(--aurora-shadow);
    overflow: hidden;
    transition: .3s;
    height: 100%;
}
.aurora-cate-card:hover { transform: translateY(-3px); box-shadow: var(--aurora-shadow-lg); }
.aurora-cate-card .thumb {
    display: block; position: relative; overflow: hidden;
    aspect-ratio: 16 / 9;
}
.aurora-cate-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.aurora-cate-card .badge-cate {
    position: absolute; top: 12px; left: 12px; z-index: 2;
    background: var(--aurora-primary); color: #fff; font-size: 12px;
    padding: 3px 10px; border-radius: 999px; font-weight: 500;
}
.aurora-cate-card .body { padding: 16px; }
.aurora-cate-card .body h3 { font-size: 16px; margin-bottom: 6px; }
.aurora-cate-card .body h3 a:hover { color: var(--aurora-primary); }
.aurora-cate-card .body .desc { font-size: 13px; color: var(--aurora-muted); margin-bottom: 8px; }
.aurora-cate-card .sub-list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.aurora-cate-card .sub-list a {
    font-size: 12px; padding: 2px 10px; border-radius: 999px;
    background: var(--aurora-bg); color: var(--aurora-text-2);
}
.aurora-cate-card .sub-list a:hover { background: var(--aurora-primary); color: #fff; }
.aurora-cate-card .mini { border-top: 1px solid var(--aurora-line); padding-top: 10px; }
.aurora-cate-card .mini li { font-size: 13px; line-height: 1.8; }
.aurora-cate-card .mini li::before { content: '·'; color: var(--aurora-primary); margin-right: 6px; font-weight: 700; }
.aurora-cate-card .mini li a:hover { color: var(--aurora-primary); }

/* ==================== 10. 标签 ==================== */
.aurora-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.aurora-tags li a {
    display: inline-block; font-size: 13px; padding: 4px 14px;
    border-radius: 999px; background: var(--aurora-bg); color: var(--aurora-text-2);
    border: 1px solid var(--aurora-line); transition: .2s;
}
.aurora-tags li a:hover { background: var(--aurora-primary); color: #fff; border-color: var(--aurora-primary); }

/* ==================== 11. 排行列表 ==================== */
.aurora-rank li {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 0; border-bottom: 1px solid var(--aurora-line);
    font-size: 14px;
}
.aurora-rank li:last-child { border-bottom: 0; }
.aurora-rank .rank-num {
    flex-shrink: 0; width: 22px; height: 22px; border-radius: 4px;
    background: var(--aurora-bg-alt); color: var(--aurora-muted);
    font-size: 12px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}
.aurora-rank .rank-num.top { background: var(--aurora-primary); color: #fff; }
.aurora-rank li a { color: var(--aurora-text-2); }
.aurora-rank li a:hover { color: var(--aurora-primary); }

/* ==================== 12. 面包屑 ==================== */
.aurora-crumb { padding: 16px 0 0; }
.aurora-crumb .breadcrumb { background: none; margin: 0; font-size: 13px; }
.aurora-crumb .breadcrumb-item a { color: var(--aurora-muted); }
.aurora-crumb .breadcrumb-item a:hover { color: var(--aurora-primary); }
.aurora-crumb .breadcrumb-item.active { color: var(--aurora-text-2); }
.aurora-crumb .breadcrumb-item + .breadcrumb-item::before { content: '>'; color: var(--aurora-line-2); }

/* ==================== 13. 文章详情 ==================== */
.aurora-page { padding-bottom: 50px; }

.aurora-article-title { font-size: 26px; line-height: 1.4; margin-bottom: 16px; }
.aurora-article-meta {
    display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; color: var(--aurora-muted);
    padding-bottom: 16px; border-bottom: 1px solid var(--aurora-line); margin-bottom: 20px;
}
.aurora-article-meta a { color: var(--aurora-muted); }
.aurora-article-meta a:hover { color: var(--aurora-primary); }

.aurora-abstract {
    background: var(--aurora-bg);
    border-left: 3px solid var(--aurora-primary);
    padding: 14px 18px;
    border-radius: 0 var(--aurora-radius-sm) var(--aurora-radius-sm) 0;
    font-size: 14px; color: var(--aurora-text-2);
    margin-bottom: 20px;
}
.aurora-abstract .label {
    font-weight: 700; color: var(--aurora-primary); margin-right: 8px;
}

.aurora-content { font-size: 16px; line-height: 1.9; color: var(--aurora-text); }
.aurora-content h2 { font-size: 20px; margin: 28px 0 14px; padding-left: 12px; border-left: 4px solid var(--aurora-primary); }
.aurora-content h3 { font-size: 18px; margin: 22px 0 12px; }
.aurora-content p { margin-bottom: 16px; }
.aurora-content img { border-radius: var(--aurora-radius-sm); margin: 10px 0; }
.aurora-content blockquote {
    background: var(--aurora-bg); border-left: 3px solid var(--aurora-primary);
    padding: 14px 18px; border-radius: 0 var(--aurora-radius-sm) var(--aurora-radius-sm) 0;
    color: var(--aurora-text-2); margin: 16px 0;
}
.aurora-content ul, .aurora-content ol { padding-left: 24px; margin-bottom: 16px; }
.aurora-content ul { list-style: disc; }
.aurora-content ol { list-style: decimal; }
.aurora-content li { margin-bottom: 6px; }
.aurora-content a { color: var(--aurora-primary); }
.aurora-content a:hover { text-decoration: underline; }
.aurora-content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.aurora-content table th, .aurora-content table td {
    border: 1px solid var(--aurora-line); padding: 10px 14px; text-align: left;
}
.aurora-content table th { background: var(--aurora-bg); font-weight: 600; }

.aurora-statement {
    font-size: 13px; color: var(--aurora-muted); background: var(--aurora-bg);
    padding: 12px 16px; border-radius: var(--aurora-radius-sm); margin-top: 20px;
}

.aurora-nextprev {
    display: flex; gap: 16px; margin-top: 24px;
}
.aurora-nextprev > div {
    flex: 1; background: var(--aurora-bg); border-radius: var(--aurora-radius-sm);
    padding: 14px 18px;
}
.aurora-nextprev p { font-size: 13px; color: var(--aurora-muted); margin-bottom: 4px; }
.aurora-nextprev a { font-size: 15px; font-weight: 500; }
.aurora-nextprev a:hover { color: var(--aurora-primary); }

/* ==================== 14. 图集 ==================== */
.aurora-gallery {
    text-align: center; margin: 20px 0;
    background: #000; border-radius: var(--aurora-radius-sm); overflow: hidden;
}
.aurora-gallery img { max-height: 70vh; margin: 0 auto; }
.aurora-gallery a { display: block; }

/* ==================== 15. 分页 ==================== */
.page-control { text-align: center; padding: 16px 0; }
.page-control a, .page-control span {
    display: inline-block; padding: 6px 14px; margin: 2px;
    border-radius: var(--aurora-radius-sm); font-size: 14px;
    background: var(--aurora-white); color: var(--aurora-text-2);
    border: 1px solid var(--aurora-line); transition: .2s;
}
.page-control a:hover, .page-control .current {
    background: var(--aurora-primary); color: #fff; border-color: var(--aurora-primary);
}

/* Bootstrap 分页覆盖 */
.aurora-page .pagination { margin-top: 24px; justify-content: center; }
.aurora-page .page-link {
    color: var(--aurora-text-2); border-color: var(--aurora-line);
    border-radius: var(--aurora-radius-sm); margin: 0 2px; font-size: 14px;
}
.aurora-page .page-item.active .page-link {
    background: var(--aurora-primary); border-color: var(--aurora-primary); color: #fff;
}
.aurora-page .page-link:hover { color: var(--aurora-primary); background: var(--aurora-bg); }

/* ==================== 16. 搜索页 ==================== */
.aurora-search-form-lg { margin-bottom: 24px; }
.aurora-search-title { font-size: 20px; margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--aurora-line); }

/* ==================== 17. 标签页 ==================== */
.aurora-tag-hero {
    display: flex; gap: 16px; align-items: flex-start; margin-bottom: 20px;
    padding-bottom: 20px; border-bottom: 1px solid var(--aurora-line);
}
.aurora-tag-hero .ico {
    flex-shrink: 0; width: 48px; height: 48px; border-radius: 12px;
    background: linear-gradient(135deg, var(--aurora-primary), var(--aurora-primary-l));
    color: #fff; display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.aurora-tag-hero h1 { font-size: 22px; margin-bottom: 4px; }
.aurora-tag-hero p { font-size: 14px; color: var(--aurora-muted); margin-bottom: 0; }

/* ==================== 18. 空状态 ==================== */
.aurora-empty {
    text-align: center; padding: 40px 20px; color: var(--aurora-muted);
}
.aurora-empty i { font-size: 48px; margin-bottom: 12px; display: block; opacity: .3; }
.aurora-empty p { font-size: 15px; }

/* ==================== 19. 页脚 ==================== */
.aurora-footer {
    background: var(--aurora-text);
    color: rgba(255,255,255,.7);
    padding-top: 50px;
    margin-top: 0;
}
.aurora-footer h5 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.aurora-footer-brand { display: flex; align-items: center; }
.aurora-footer-brand i { color: var(--aurora-secondary); }
.aurora-footer-desc { font-size: 14px; line-height: 1.7; }
.aurora-footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.aurora-footer-links a { color: rgba(255,255,255,.6); font-size: 13px; }
.aurora-footer-links a:hover { color: #fff; }
.aurora-footer-cates li { margin-bottom: 6px; }
.aurora-footer-cates a { color: rgba(255,255,255,.6); font-size: 14px; }
.aurora-footer-cates a:hover { color: #fff; }
.aurora-footer-news li { margin-bottom: 8px; }
.aurora-footer-news a { color: rgba(255,255,255,.6); font-size: 14px; }
.aurora-footer-news a:hover { color: #fff; }

.aurora-copy {
    border-top: 1px solid rgba(255,255,255,.1);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,.4);
}
.aurora-copy a { color: rgba(255,255,255,.5); }
.aurora-copy a:hover { color: #fff; }

/* ==================== 20. 返回顶部 ==================== */
.aurora-totop {
    position: fixed; bottom: 30px; right: 30px; z-index: 999;
    width: 42px; height: 42px; border-radius: 50%;
    background: var(--aurora-primary); color: #fff;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 14px rgba(26, 115, 232, .35);
    opacity: 0; visibility: hidden; transition: .3s;
    text-decoration: none;
}
.aurora-totop.show { opacity: 1; visibility: visible; }
.aurora-totop:hover { transform: translateY(-3px); color: #fff; box-shadow: 0 6px 20px rgba(26, 115, 232, .45); }

/* ==================== 21. 响应式 ==================== */
@media (max-width: 991.98px) {
    .aurora-hero { padding: 40px 0; }
    .aurora-hero h1 { font-size: 1.8rem; }
    .aurora-hero-visual { display: none; }
    .aurora-section { padding: 40px 0; }
    .aurora-section-title { margin-bottom: 28px; }
    .aurora-section-title h2 { font-size: 1.5rem; }
    .aurora-topbar { display: none; }
    .aurora-navbar .nav-link.active::after { display: none; }
}

@media (max-width: 767.98px) {
    .aurora-list-item { flex-direction: column; }
    .aurora-list-thumb { width: 100%; height: 180px; }
    .aurora-nextprev { flex-direction: column; }
    .aurora-article-title { font-size: 20px; }
    .aurora-box-body { padding: 16px; }
    .aurora-hero-buttons { flex-direction: column; }
    .aurora-hero-buttons a { text-align: center; justify-content: center; }
    .aurora-totop { bottom: 20px; right: 16px; width: 38px; height: 38px; }
}