/* ========================================
   个人博客 · 统一全局样式
   ======================================== */

:root {
    --bg: #0c0c14;
    --bg-card: #161626;
    --bg-card-hover: #1c1c30;
    --gold: #c9a050;
    --gold-light: #e8d5a3;
    --gold-dim: rgba(201,160,80,0.15);
    --jade: #5a9e8f;
    --jade-light: #8fd4c5;
    --text: #d0d0d8;
    --text-dim: #808098;
    --text-muted: #5a5a6e;
    --border: #252538;
    --radius: 12px;
    --shadow: 0 8px 32px rgba(0,0,0,0.3);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
    font-family: 'Segoe UI', 'PingFang SC', 'Noto Serif SC', 'STSong', 'Microsoft YaHei', serif;
    background: var(--bg); color: var(--text); line-height: 1.9;
    min-height: 100vh;
}

/* ========== 顶部导航栏 ========== */
.navbar {
    position: fixed; top:0; left:0; right:0; z-index:1000;
    background: rgba(12,12,20,0.88); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border); padding: 0 32px; height: 60px;
    display: flex; align-items: center; justify-content: space-between;
}
.navbar .logo {
    font-size: 17px; font-weight: 700; color: var(--gold); letter-spacing: 3px;
    text-decoration: none;
}
.navbar .nav-links { display: flex; gap: 24px; }
.navbar .nav-links a {
    color: var(--text-dim); text-decoration: none; font-size: 13px;
    letter-spacing: 1px; transition: color 0.3s;
}
.navbar .nav-links a:hover, .navbar .nav-links a.active { color: var(--gold); }

/* ========== 导航栏下拉菜单 ========== */
.nav-dropdown {
    position: relative; display: inline-block;
}
.nav-dropdown-trigger {
    cursor: pointer; user-select: none;
}
.nav-dropdown-content {
    display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
    min-width: 200px; background: rgba(22, 22, 38, 0.96); backdrop-filter: blur(16px);
    border: 1px solid var(--border); border-radius: 8px; padding: 8px 0;
    box-shadow: 0 12px 40px rgba(0,0,0,0.5); z-index: 1001;
}
.nav-dropdown-content a {
    display: block; padding: 10px 20px; color: var(--text-dim) !important;
    font-size: 12px !important; letter-spacing: 1px; white-space: nowrap;
    transition: all 0.2s; text-decoration: none;
}
.nav-dropdown-content a:hover {
    background: rgba(201, 160, 80, 0.08); color: var(--gold) !important;
}
.nav-dropdown:hover .nav-dropdown-content {
    display: block; animation: dropdownFadeIn 0.25s ease;
}
@keyframes dropdownFadeIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-8px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}
/* 移动端适配 */
@media (max-width: 768px) {
    .nav-dropdown-content {
        position: static; transform: none; box-shadow: none;
        background: rgba(12,12,20,0.6); border: none; padding: 0 0 0 16px;
        min-width: auto;
    }
    .nav-dropdown-content a { padding: 8px 16px; }
}

/* ========== 搜索框 ========== */
.search-box {
    max-width: 600px; margin: 0 auto 32px; position: relative;
}
.search-box input {
    width: 100%; padding: 14px 20px 14px 48px; font-size: 15px;
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 50px;
    color: var(--text); outline: none; transition: border-color 0.3s;
}
.search-box input:focus { border-color: var(--gold); }
.search-box .search-icon {
    position: absolute; left: 18px; top: 50%; transform: translateY(-50%);
    color: var(--text-dim); font-size: 16px; pointer-events: none;
}

/* ========== 标签筛选栏 ========== */
.tag-bar {
    display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 32px;
}
.tag-btn {
    padding: 6px 18px; font-size: 12px; border-radius: 20px; cursor: pointer;
    background: var(--bg-card); border: 1px solid var(--border); color: var(--text-dim);
    letter-spacing: 1px; transition: all 0.3s;
}
.tag-btn:hover { border-color: var(--gold); color: var(--gold); }
.tag-btn.active { background: var(--gold-dim); border-color: var(--gold); color: var(--gold); }

/* ========== 文章卡片网格 ========== */
.article-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}
.article-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 28px; cursor: pointer; transition: all 0.3s; text-decoration: none;
    display: flex; flex-direction: column;
}
.article-card:hover {
    transform: translateY(-4px); box-shadow: var(--shadow);
    border-color: rgba(201,160,80,0.25); background: var(--bg-card-hover);
}
.article-card .card-date {
    font-size: 11px; color: var(--text-muted); letter-spacing: 2px; margin-bottom: 10px;
}
.article-card .card-title {
    font-size: 20px; font-weight: 600; color: var(--gold-light); margin-bottom: 8px;
    line-height: 1.4;
}
.article-card .card-desc {
    font-size: 13px; color: var(--text-dim); line-height: 1.7;
    flex: 1; margin-bottom: 14px;
    display: -webkit-box; -webkit-line-clamp:3; -webkit-box-orient: vertical; overflow: hidden;
}
.article-card .card-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.article-card .card-tags span {
    font-size: 10px; padding: 2px 10px; border-radius: 10px;
    background: var(--gold-dim); color: var(--gold); letter-spacing: 1px;
}

.no-results {
    text-align: center; padding: 60px 20px; color: var(--text-dim); grid-column: 1 / -1;
    font-size: 16px;
}

/* ========== 文章详情页 ========== */
.article-page { max-width: 780px; margin: 0 auto; padding: 100px 20px 60px; }
.article-page .breadcrumb {
    font-size: 12px; color: var(--text-muted); margin-bottom: 24px; letter-spacing: 1px;
}
.article-page .breadcrumb a { color: var(--gold); text-decoration: none; }
.article-page .breadcrumb a:hover { text-decoration: underline; }
.article-page .article-meta {
    text-align: center; margin-bottom: 40px;
}
.article-page .article-meta .meta-date {
    font-size: 12px; color: var(--text-muted); letter-spacing: 2px; margin-bottom: 8px;
}
.article-page .article-meta h1 {
    font-size: clamp(28px, 5vw, 40px); font-weight: 900; letter-spacing: 3px;
    color: var(--gold-light); margin-bottom: 12px;
}
.article-page .article-meta .meta-tags span {
    font-size: 10px; padding: 3px 12px; border-radius: 10px;
    background: var(--gold-dim); color: var(--gold); letter-spacing: 1px;
    margin: 0 3px;
}

/* 文章正文 */
.article-body {
    color: var(--text-dim); font-size: 15px; line-height: 2;
}
.article-body h2 {
    font-size: 24px; color: var(--gold); margin: 48px 0 16px;
    padding-bottom: 8px; border-bottom: 1px solid var(--border); letter-spacing: 2px;
}
.article-body h3 {
    font-size: 18px; color: var(--gold-light); margin: 32px 0 12px;
}
.article-body p { margin-bottom: 16px; }
.article-body ul, .article-body ol { padding-left: 24px; margin-bottom: 16px; }
.article-body li { margin-bottom: 8px; }
.article-body strong { color: var(--gold-light); }
.article-body blockquote {
    border-left: 3px solid var(--gold); padding: 16px 24px; margin: 24px 0;
    background: var(--gold-dim); color: var(--gold-light);
    font-style: italic; font-size: 16px; border-radius: 0 8px 8px 0;
}
.article-body table {
    width: 100%; border-collapse: collapse; font-size: 13px; margin: 20px 0;
}
.article-body th {
    background: var(--gold-dim); color: var(--gold-light); padding: 10px 14px;
    text-align: left; border-bottom: 2px solid var(--border); font-weight: 600;
}
.article-body td {
    padding: 10px 14px; border-bottom: 1px solid var(--border); color: var(--text-dim);
}
.article-body tr:hover td { background: rgba(201,160,80,0.03); }

/* 标签徽章 */
.tag-badge {
    display: inline-block; padding: 2px 10px; font-size: 10px; border-radius: 12px;
    margin-right: 4px; letter-spacing: 1px;
}
.tag-badge.warn { background: rgba(201,79,79,0.12); color: #e06060; border: 1px solid rgba(201,79,79,0.2); }
.tag-badge.ok { background: rgba(90,158,143,0.12); color: #7ec4b5; border: 1px solid rgba(90,158,143,0.2); }
.tag-badge.info { background: rgba(106,175,207,0.12); color: #7abcd8; border: 1px solid rgba(106,175,207,0.2); }

/* 病机链条 */
.chain-diagram {
    text-align: center; padding: 24px 20px; font-size: 14px; line-height: 2.6;
}
.chain-diagram span {
    display: inline-block; padding: 4px 10px; margin: 3px;
    border-radius: 6px; background: var(--bg-card); border: 1px solid var(--border);
    font-size: 13px;
}
.chain-diagram .arrow { color: var(--gold); border: none; background: none; font-size: 18px; padding: 0 4px; }

/* 上/下篇文章导航 */
.article-nav {
    display: flex; justify-content: space-between; margin-top: 60px; padding-top: 24px;
    border-top: 1px solid var(--border);
}
.article-nav a {
    color: var(--gold); text-decoration: none; font-size: 14px;
    transition: color 0.3s; max-width: 45%;
}
.article-nav a:hover { color: var(--gold-light); }
.article-nav .nav-label { font-size: 11px; color: var(--text-muted); letter-spacing: 1px; }
.article-nav .prev { text-align: left; }
.article-nav .next { text-align: right; margin-left: auto; }

/* ========== 页脚 ========== */
.footer {
    text-align: center; padding: 60px 20px; border-top: 1px solid var(--border);
    color: var(--text-muted); font-size: 13px; letter-spacing: 1px;
}

/* ========== 淡入动画 ========== */
.fade-in { opacity: 0; transform: translateY(24px); transition: all 0.7s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .navbar { padding: 0 16px; }
    .navbar .nav-links { gap: 14px; }
    .navbar .nav-links a { font-size: 11px; }
    .article-grid { grid-template-columns: 1fr; }
    .article-page { padding: 80px 14px 40px; }
}