/* ===== 设计系统变量 ===== */
/* 深色（科技风，默认）；前台与后台统一跟随 data-theme 切换 */
:root {
    --bg-primary: #0A0F1C;
    --bg-secondary: #0D1424;
    --bg-card: #111827;
    --bg-tertiary: #1E293B;
    --bg-sidebar: #070B14;
    --accent: #3B82F6;
    --accent-2: #8B5CF6;
    --accent-soft: rgba(59,130,246,0.12);
    --accent-border: rgba(59,130,246,0.3);
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-muted: #9DA8BC;
    --text-faint: #7E8CA3;
    --border: #222E42;
    --border-light: #3A4A63;
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #60A5FA;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow-card: 0 20px 60px rgba(0,0,0,0.5);
    --shadow-btn: 0 4px 20px rgba(59,130,246,0.35);
    --shadow-soft: 0 8px 24px rgba(0,0,0,0.28);
    --shadow-hover: 0 16px 36px rgba(0,0,0,0.42);
    --nav-bg: rgba(10,15,28,0.85);
    --font-sans: 'Inter','Noto Sans SC','PingFang SC','Segoe UI',Arial,sans-serif;
    --font-mono: 'JetBrains Mono','Fira Code',monospace;
}

/* ===== 企业级浅色主题（克制、专业、可信） ===== */
[data-theme="light"] {
    --bg-primary: #F3F5F9;
    --bg-secondary: #FFFFFF;
    --bg-card: #FFFFFF;
    --bg-tertiary: #EEF2F8;
    --bg-sidebar: #FFFFFF;
    --accent: #2563EB;
    --accent-2: #4F46E5;
    --accent-soft: rgba(37,99,235,0.09);
    --accent-border: rgba(37,99,235,0.28);
    --text-primary: #0F172A;
    --text-secondary: #334155;
    --text-muted: #5B6678;
    --text-faint: #8A94A6;
    --border: #E4E9F2;
    --border-light: #CBD5E1;
    --success: #059669;
    --warning: #D97706;
    --error: #DC2626;
    --info: #2563EB;
    --shadow-card: 0 18px 48px rgba(15,23,42,0.10);
    --shadow-btn: 0 4px 16px rgba(37,99,235,0.22);
    --shadow-soft: 0 6px 20px rgba(15,23,42,0.07);
    --shadow-hover: 0 14px 32px rgba(15,23,42,0.12);
    --nav-bg: rgba(255,255,255,0.85);
}

/* 浅色主题下的整体精修：阴影更柔、代码块转浅、深色渐变文字压深 */
[data-theme="light"] .card,
[data-theme="light"] .stat-item,
[data-theme="light"] .about-card {
    box-shadow: var(--shadow-soft);
}
[data-theme="light"] .card:hover,
[data-theme="light"] .stat-item:hover {
    box-shadow: var(--shadow-hover), 0 0 0 1px rgba(37,99,235,0.1);
}
[data-theme="light"] .contact-cta {
    box-shadow: 0 20px 50px rgba(15,23,42,0.10), inset 0 1px 0 rgba(255,255,255,0.6);
}
[data-theme="light"] .code-block { background: #F6F8FC; }
[data-theme="light"] .code-header { background: #EDF1F7; }
[data-theme="light"] .code-header .lang { color: #64748B; }
[data-theme="light"] .hero::before {
    background: radial-gradient(ellipse, rgba(37,99,235,0.10), transparent 70%);
}
[data-theme="light"] .stat-item .num {
    background: linear-gradient(135deg, #0F172A, #2563EB);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 浅色主题：后台精修 */
[data-theme="light"] .admin-card,
[data-theme="light"] .admin-stat-card { box-shadow: 0 4px 16px rgba(15,23,42,0.06); }
[data-theme="light"] .admin-stat-card:hover { box-shadow: 0 10px 24px rgba(15,23,42,0.10); }
[data-theme="light"] .admin-table tbody tr:hover td { background: rgba(37,99,235,0.05); }
[data-theme="light"] .admin-table th { background: #F8FAFC; }
[data-theme="light"] .user-dropdown { box-shadow: 0 18px 44px rgba(15,23,42,0.16); }
[data-theme="light"] .form-input,
[data-theme="light"] .form-textarea { background: #FFFFFF; }
[data-theme="light"] .form-input::placeholder,
[data-theme="light"] .form-textarea::placeholder { color: #9AA6B8; }
/* MudBlazor 浅色下的弹层/菜单表面 */
[data-theme="light"] .mud-menu .mud-list,
[data-theme="light"] .mud-popover { background: #FFFFFF; }

/* ===== 重置与基础 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* Blazor 增强导航会把程序焦点移到新页面标题(h1/h2)，并动态给标题加
   tabindex="-1"，导致点击站内链接后标题周围出现焦点框。标题不是交互元素
   （键盘 Tab 无法聚焦），只有程序焦点会落上去，:focus 和 :focus-visible
   两种情况都去掉，不影响无障碍。 */
h1:focus, h2:focus, h3:focus,
h1:focus-visible, h2:focus-visible, h3:focus-visible { outline: none; }

/* 键盘 Tab 导航时，交互元素显示统一的蓝色焦点框（替代浏览器默认样式）。
   不要用 [tabindex] 通配：Blazor 会给标题动态加 tabindex="-1"。 */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.btn-ghost:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}
body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--info); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent); }
h1,h2,h3,h4,h5,h6 { color: var(--text-primary); font-weight: 700; line-height: 1.3; }
img { max-width: 100%; height: auto; }
::selection { background: var(--accent); color: #fff; }

/* ===== 布局容器 ===== */
.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }
.container-wide { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ===== 导航栏 ===== */
.navbar {
    position: sticky; top: 0; z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
/* 两端渐隐的发丝分隔线，替代生硬的通栏实线 */
.navbar::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--border) 18%, var(--border) 82%, transparent);
}
.navbar-inner {
    max-width: 1100px; margin: 0 auto; padding: 14px 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.navbar-logo {
    display: flex; align-items: center; gap: 10px;
    font-size: 15px; font-weight: 700; color: var(--text-primary);
}
.navbar-logo .logo-icon {
    width: 30px; height: 30px; border-radius: 8px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; font-weight: 800; color: #fff;
}
.navbar-logo .logo-img {
    width: 30px; height: 30px; border-radius: 8px;
    object-fit: cover; display: block; flex-shrink: 0;
}
.navbar-links { display: flex; gap: 24px; align-items: center; }
.navbar-links a {
    font-size: 13px; color: var(--text-muted); font-weight: 500;
    transition: color .2s;
}
.navbar-links a:hover, .navbar-links a.active { color: var(--info); }
.navbar-links .btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff; padding: 7px 16px; border-radius: 8px; font-weight: 600;
}
.mobile-menu-btn { display: none; background: none; border: none; color: var(--text-primary); font-size: 20px; cursor: pointer; }

/* ===== Hero ===== */
.hero {
    text-align: center; padding: 64px 24px 48px;
    position: relative; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: -100px; left: 50%; transform: translateX(-50%);
    width: 600px; height: 300px;
    background: radial-gradient(ellipse, rgba(59,130,246,0.12), transparent 70%);
    pointer-events: none;
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--accent-soft); border: 1px solid var(--accent-border);
    border-radius: 20px; padding: 5px 14px;
    font-size: 11px; color: var(--info); margin-bottom: 20px;
    position: relative;
}
.hero-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); }
.hero h1 {
    font-size: 38px; font-weight: 800; margin-bottom: 14px;
    letter-spacing: -0.5px; position: relative;
}
.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p { font-size: 16px; color: var(--text-muted); max-width: 520px; margin: 0 auto 24px; line-height: 1.7; position: relative; }
.hero-actions { display: flex; gap: 12px; justify-content: center; margin-bottom: 24px; position: relative; flex-wrap: wrap; }
.hero-social { display: flex; gap: 16px; justify-content: center; font-size: 18px; position: relative; }
.hero-social a { color: var(--text-faint); }
.hero-social a:hover { color: var(--info); }

/* ===== 按钮 ===== */
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff; border: none; padding: 11px 26px; border-radius: 10px;
    font-size: 13px; font-weight: 600; cursor: pointer;
    box-shadow: var(--shadow-btn); transition: all .2s;
    display: inline-flex; align-items: center; gap: 6px;
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-secondary {
    background: rgba(255,255,255,0.03); color: var(--text-secondary);
    border: 1px solid var(--border-light); padding: 11px 26px; border-radius: 10px;
    font-size: 13px; font-weight: 500; cursor: pointer; transition: all .2s;
    display: inline-flex; align-items: center; gap: 6px;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--text-primary); }

/* ===== 统计卡片 ===== */
.stats-section { padding: 8px 24px 0; }
.stats-bar {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.stat-item {
    text-align: center;
    background: linear-gradient(180deg, rgba(255,255,255,0.025), transparent 45%), var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 16px 24px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.28);
    transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.stat-item:hover {
    transform: translateY(-3px);
    border-color: var(--accent-border);
    box-shadow: 0 16px 36px rgba(0,0,0,0.42), 0 0 0 1px rgba(59,130,246,0.12);
}
.stat-item .num {
    font-size: 28px; font-weight: 800;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, #F8FAFC, #93B4F5);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-item .label { font-size: 11.5px; color: var(--text-faint); margin-top: 6px; }

/* ===== 区块 ===== */
.section { padding: 64px 24px; }
.section-header {
    display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px;
}
.section-title {
    font-size: 20px; font-weight: 700; color: var(--text-primary);
    letter-spacing: 0.2px;
    display: flex; align-items: center; gap: 11px;
}
.section-title::before {
    content: ''; width: 4px; height: 19px;
    background: linear-gradient(180deg, var(--accent), var(--accent-2));
    border-radius: 2px;
    box-shadow: 0 0 12px rgba(59,130,246,0.5);
}
.section-more {
    font-size: 12px; color: var(--info); cursor: pointer;
    display: inline-flex; align-items: center; gap: 4px;
    transition: gap .2s, color .2s;
}
.section-more:hover { gap: 8px; }

/* 首页联系我 CTA 卡片 */
.contact-cta {
    position: relative;
    overflow: hidden;
    text-align: center;
    background:
        linear-gradient(135deg, rgba(59,130,246,0.16), rgba(139,92,246,0.14)),
        var(--bg-card);
    border: 1px solid var(--accent-border);
    border-radius: var(--radius-lg);
    padding: 56px 32px;
    box-shadow:
        0 24px 60px rgba(0,0,0,0.45),
        inset 0 1px 0 rgba(148,163,184,0.08);
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.contact-cta:hover {
    transform: translateY(-3px);
    border-color: rgba(59,130,246,0.55);
    box-shadow:
        0 32px 70px rgba(0,0,0,0.5),
        0 0 0 1px rgba(59,130,246,0.15),
        inset 0 1px 0 rgba(148,163,184,0.1);
}
/* 顶部渐变高光线，强化“卡片”质感 */
.contact-cta::before {
    content: '';
    position: absolute; top: 0; left: 12%; right: 12%; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(96,165,250,0.55), transparent);
}
.contact-cta-glow {
    position: absolute; pointer-events: none;
    width: 360px; height: 360px; border-radius: 50%;
    top: -200px; left: 50%; transform: translateX(-50%);
    background: radial-gradient(circle, rgba(59,130,246,0.25), transparent 70%);
}
.contact-cta-title { position: relative; font-size: 22px; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; }
.contact-cta-desc { position: relative; font-size: 13.5px; color: var(--text-secondary); margin-bottom: 26px; }
.contact-cta-actions {
    position: relative;
    display: flex; justify-content: center; gap: 12px; flex-wrap: wrap;
}
.contact-cta-actions .btn-secondary { white-space: nowrap; }

/* ===== 卡片 ===== */
.card {
    background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent 40%), var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px; overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.28);
    transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.card:hover {
    border-color: var(--accent-border);
    transform: translateY(-3px);
    box-shadow: 0 16px 36px rgba(0,0,0,0.42), 0 0 0 1px rgba(59,130,246,0.12);
}
.card-cover {
    height: 140px; display: flex; align-items: center; justify-content: center;
    font-size: 34px; position: relative;
}
.card-cover .badge {
    position: absolute; top: 12px; right: 12px;
    font-size: 9px; padding: 3px 9px; border-radius: 6px; font-weight: 600;
    backdrop-filter: blur(4px);
}
.badge-open { background: rgba(16,185,129,0.15); color: var(--success); border: 1px solid rgba(16,185,129,0.3); }
.badge-prod { background: var(--accent-soft); color: var(--info); border: 1px solid var(--accent-border); }
.badge-ent { background: rgba(245,158,11,0.15); color: var(--warning); border: 1px solid rgba(245,158,11,0.3); }
.card-body { padding: 18px; }
.card-title { font-size: 14px; font-weight: 700; color: var(--text-primary); margin-bottom: 7px; letter-spacing: 0.2px; }
.card-desc { font-size: 12px; color: var(--text-muted); line-height: 1.7; margin-bottom: 14px; }
.card-tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* ===== 标签 ===== */
.tag {
    font-size: 10.5px; padding: 4px 11px; border-radius: 6px;
    background: var(--bg-tertiary); color: var(--text-muted);
    border: 1px solid transparent;
}
.tag-accent { background: var(--accent-soft); color: var(--info); border: 1px solid var(--accent-border); }

/* ===== 网格 ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

/* ===== 文章列表 ===== */
.post-list { display: flex; flex-direction: column; gap: 10px; }
.post-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 15px 18px; border-radius: 10px; cursor: pointer;
    background: var(--bg-card); border: 1px solid var(--border);
    transition: border-color .2s ease, transform .2s ease, background .2s ease;
}
.post-item:hover {
    border-color: var(--accent-border);
    background: linear-gradient(90deg, rgba(59,130,246,0.07), transparent 60%), var(--bg-card);
    transform: translateX(3px);
}
.post-item .title { font-size: 13.5px; font-weight: 500; color: var(--text-secondary); display: flex; align-items: center; gap: 10px; transition: color .2s; }
.post-item:hover .title { color: var(--text-primary); }
.post-item .meta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; margin-left: 12px; }
.post-item .read-time { font-size: 11px; color: var(--text-faint); }

/* ===== 首页关于我卡片 ===== */
.about-card {
    display: flex; gap: 26px; align-items: flex-start; flex-wrap: wrap;
    background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent 40%), var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px; padding: 28px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.28);
}
.about-avatar { width: 80px; height: 80px; font-size: 32px; border-radius: 18px; }
.about-avatar .online-dot { border-color: var(--bg-card); }
.about-text { flex: 1; min-width: 240px; }
.about-text p { font-size: 13.5px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 16px; }
.about-tags { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== 关于页 ===== */
.profile-header {
    display: flex; gap: 20px; align-items: center; padding: 28px 24px;
    position: relative; overflow: hidden;
}
.profile-header::before {
    content: ''; position: absolute; top: -40px; right: -40px;
    width: 200px; height: 200px;
    background: radial-gradient(circle, rgba(59,130,246,0.1), transparent 70%);
}
.avatar {
    width: 84px; height: 84px; border-radius: 20px;
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-primary));
    border: 2px solid var(--border-light);
    display: flex; align-items: center; justify-content: center;
    font-size: 36px; flex-shrink: 0; position: relative;
}
.avatar .online-dot {
    position: absolute; bottom: -2px; right: -2px;
    width: 22px; height: 22px; border-radius: 50%;
    background: var(--success); border: 3px solid var(--bg-primary);
}
.profile-info h2 { font-size: 19px; margin-bottom: 4px; }
.profile-info .role { font-size: 11px; color: var(--info); margin-bottom: 8px; }
.profile-tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* 技能条 */
.skill-item { margin-bottom: 12px; }
.skill-header { display: flex; justify-content: space-between; font-size: 11px; color: var(--text-secondary); margin-bottom: 5px; }
.skill-bar { height: 7px; background: var(--bg-tertiary); border-radius: 3px; overflow: hidden; }
.skill-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 3px; }

/* 时间线 */
.timeline { position: relative; padding-left: 22px; }
.timeline::before {
    content: ''; position: absolute; left: 5px; top: 6px; bottom: 6px;
    width: 2px; background: linear-gradient(180deg, var(--accent), var(--border));
}
.timeline-item { position: relative; margin-bottom: 18px; }
.timeline-item::before {
    content: ''; position: absolute; left: -19px; top: 4px;
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--accent); border: 2px solid var(--bg-primary);
}
.timeline-item .tl-title { font-size: 12px; font-weight: 600; color: var(--text-primary); }
.timeline-item .tl-date { font-size: 10px; color: var(--info); margin: 2px 0 4px; }
.timeline-item .tl-desc { font-size: 11px; color: var(--text-faint); line-height: 1.7; }

/* ===== 文章详情 ===== */
.article-header { padding: 24px 0 16px; border-bottom: 1px solid var(--border); margin-bottom: 24px; }
.article-header h1 { font-size: 24px; margin-bottom: 10px; line-height: 1.4; }
.article-meta { display: flex; gap: 14px; font-size: 11px; color: var(--text-faint); flex-wrap: wrap; }
.article-content { font-size: 14px; line-height: 1.9; color: var(--text-secondary); }
.article-content h2 { font-size: 18px; margin: 28px 0 12px; display: flex; align-items: center; gap: 8px; }
.article-content h2::before { content: ''; width: 3px; height: 16px; background: var(--accent); border-radius: 2px; }
.article-content h3 { font-size: 15px; margin: 20px 0 10px; }
.article-content p { margin-bottom: 14px; }
.article-content ul, .article-content ol { padding-left: 22px; margin-bottom: 14px; }
.article-content li { margin-bottom: 6px; }
.article-content a { color: var(--info); text-decoration: underline; }
.article-content blockquote {
    border-left: 3px solid var(--warning); background: rgba(245,158,11,0.08);
    padding: 10px 16px; border-radius: 0 8px 8px 0; margin: 16px 0;
    font-size: 13px; color: #A8A29E;
}

/* 代码块 */
.code-block {
    background: #0D1117; border: 1px solid var(--border); border-radius: 8px;
    overflow: hidden; margin: 16px 0;
}
.code-header {
    display: flex; align-items: center; gap: 6px;
    padding: 7px 12px; background: #161B22; border-bottom: 1px solid var(--border);
}
.code-header .dot { width: 9px; height: 9px; border-radius: 50%; }
.code-header .lang { font-size: 10px; color: #6E7681; margin-left: 6px; }
.code-block pre {
    padding: 14px; overflow-x: auto; font-family: var(--font-mono);
    font-size: 12px; line-height: 1.7; color: #E6EDF3;
}
.code-block code { font-family: var(--font-mono); }
:not(pre) > code {
    background: var(--bg-tertiary); padding: 2px 6px; border-radius: 4px;
    font-family: var(--font-mono); font-size: 12px; color: var(--info);
}

/* ===== 联系表单 ===== */
.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: 11px; font-weight: 600; color: var(--text-muted); margin-bottom: 5px; }
.form-input, .form-textarea {
    width: 100%; background: var(--bg-card); border: 1px solid var(--border);
    border-radius: 8px; padding: 9px 12px; font-size: 12px;
    color: var(--text-primary); font-family: var(--font-sans);
    transition: border-color .2s; outline: none;
}
.form-input:focus, .form-textarea:focus { border-color: var(--accent); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ===== 页脚 ===== */
.footer {
    position: relative;
    padding: 24px;
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px;
    font-size: 11px; color: var(--text-faint);
}
.footer::before {
    content: ''; position: absolute; left: 0; right: 0; top: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--border) 18%, var(--border) 82%, transparent);
}
.footer-links { display: flex; gap: 16px; }
.footer-links a { color: var(--text-faint); }
.footer-version {
    color: var(--text-faint);
    text-decoration: none;
    font-variant-numeric: tabular-nums;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 6px;
    margin-left: 4px;
    transition: color .15s, border-color .15s;
}
.footer-version:hover { color: var(--accent); border-color: var(--accent); }

/* ===== 提示框 ===== */
.callout {
    background: var(--accent-soft); border-left: 3px solid var(--accent);
    border-radius: 0 8px 8px 0; padding: 14px 18px; margin: 16px 0;
    font-size: 13px; color: var(--text-secondary);
}
.callout-warn { background: rgba(245,158,11,0.08); border-left-color: var(--warning); }

/* ===== 分页 ===== */
.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 24px; }
.page-btn {
    width: 28px; height: 28px; border-radius: 6px; display: flex;
    align-items: center; justify-content: center; font-size: 11px;
    cursor: pointer; border: 1px solid var(--border);
    background: var(--bg-card); color: var(--text-muted);
}
.page-btn.active { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border: none; font-weight: 600; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .navbar-links { display: none; }
    .mobile-menu-btn { display: block; }
    .hero h1 { font-size: 28px; }
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .stat-item { padding: 20px 12px; }
    .stat-item .num { font-size: 22px; }
    .profile-header { flex-direction: column; text-align: center; }
}

/* ===== Blazor 错误边界 ===== */
.blazor-error-boundary {
    background: var(--error); color: #fff; padding: 1rem;
    border-radius: 8px; margin: 1rem 0;
}
#blazor-error-ui {
    background: var(--bg-card); color: var(--text-secondary);
    border-top: 1px solid var(--border); padding: 12px 24px;
    display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 1000;
}
#blazor-error-ui .reload { color: var(--info); cursor: pointer; margin-right: 12px; }
#blazor-error-ui .dismiss { cursor: pointer; float: right; }

/* 表单验证 */
.valid.modified:not([type=checkbox]) { outline: 1px solid var(--success); }
.invalid { outline: 1px solid var(--error); }
.validation-message { color: var(--error); font-size: 11px; margin-top: 4px; }

/* MudBlazor 深色主题覆盖 */
.mud-paper { background-color: var(--bg-card) !important; }
.mud-table { background-color: var(--bg-card) !important; }
.mud-input-control > .mud-input-control-input-container > div.mud-input.mud-input-text { color: var(--text-primary) !important; }

/* ===== Vditor Markdown 编辑器 ===== */
.md-editor-host { width: 100%; min-width: 0; box-sizing: border-box; }
.md-editor-host.vditor {
    width: 100%;
    border-radius: 8px;
    border-color: var(--border);
    background: var(--bg-card);
}
.md-editor-host.vditor:focus-within { border-color: var(--accent); }
.md-editor-host .vditor-content { width: 100%; }
.md-editor-host .vditor-ir,
.md-editor-host .vditor-wysiwyg,
.md-editor-host .vditor-sv { min-width: 0; }
.md-editor-host .vditor-toolbar {
    border-bottom-color: var(--border);
    background: transparent;
}
.md-editor-host .vditor-reset { font-size: 13px; line-height: 1.7; }
/* 验证失败：红色边框（覆盖全局 .invalid 的 outline） */
.md-editor-host.invalid { outline: none; }
.md-editor-host.invalid .vditor { border-color: var(--error); }

/* ===== Auth 页面布局（登录/注册/找回密码等） ===== */
.auth-wrap {
    min-height: calc(100vh - 120px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 20px;
    background:
        radial-gradient(ellipse at top, rgba(59,130,246,0.08), transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(139,92,246,0.06), transparent 50%);
}
.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    box-shadow:
        0 0 0 1px rgba(59,130,246,0.08),
        0 20px 50px rgba(0,0,0,0.3);
}
.auth-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}
.auth-brand-logo {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 800;
    color: #fff;
    box-shadow: 0 4px 12px rgba(59,130,246,0.3);
}
.auth-brand-text { flex: 1; }
.auth-brand-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}
.auth-brand-sub {
    font-size: 11px;
    color: var(--text-faint);
    margin-top: 2px;
}

/* Auth body */
.auth-body h1,
.auth-body h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 4px;
}
.auth-body .subtitle {
    font-size: 12px;
    color: var(--text-muted);
    margin: 0 0 20px;
}
.auth-body hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 14px 0;
}
.auth-body .form-group { margin-bottom: 14px; }
.auth-body .form-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
    letter-spacing: 0.3px;
}
.auth-body input,
.auth-body .form-input {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 13px;
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color .15s, box-shadow .15s;
    outline: none;
    box-sizing: border-box;
}
.auth-body input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}
.auth-body input::placeholder { color: var(--text-faint); }

.auth-body .checkbox-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 12px 0;
    font-size: 12px;
    color: var(--text-muted);
    cursor: pointer;
}
.auth-body .checkbox-row input[type="checkbox"] {
    width: 14px;
    height: 14px;
    accent-color: var(--accent);
    cursor: pointer;
}

.auth-body .btn-submit {
    width: 100%;
    padding: 11px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    border: none;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all .15s ease;
    font-family: inherit;
    letter-spacing: 0.3px;
}
.auth-body .btn-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(59,130,246,0.4);
}
.auth-body .btn-submit:active { transform: translateY(0); }

.auth-body .text-danger {
    font-size: 11px;
    color: var(--error);
    margin-top: 4px;
    display: block;
}
.auth-body .validation-summary {
    background: rgba(239,68,68,0.08);
    border: 1px solid rgba(239,68,68,0.25);
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 14px;
    font-size: 11px;
    color: var(--error);
    list-style: none;
}

.auth-body .divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
    font-size: 11px;
    color: var(--text-faint);
}
.auth-body .divider::before,
.auth-body .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-body .auth-links {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 14px;
    font-size: 11.5px;
}
.auth-body .auth-links a {
    color: var(--accent);
    text-decoration: none;
}
.auth-body .auth-links a:hover { text-decoration: underline; }

.auth-body .auth-error {
    background: rgba(239,68,68,0.08);
    border: 1px solid rgba(239,68,68,0.25);
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 14px;
    font-size: 11.5px;
    color: var(--error);
}

/* ===== Admin 后台布局 ===== */
.admin-layout { display: flex; min-height: 100vh; background: var(--bg-primary); }
.admin-sidebar {
    width: 220px; flex-shrink: 0; background: var(--bg-sidebar);
    border-right: 1px solid var(--border); padding: 0;
    display: flex; flex-direction: column;
    position: sticky; top: 0; height: 100vh;
}
.admin-sidebar .admin-brand {
    padding: 18px 14px 18px; display: flex; align-items: center; gap: 10px;
    border-bottom: 1px solid var(--border);
}
.admin-sidebar .admin-brand .logo {
    width: 32px; height: 32px; border-radius: 9px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 800; color: #fff;
    box-shadow: 0 2px 8px rgba(59,130,246,0.25);
}
.admin-sidebar .admin-brand .title { font-size: 13px; font-weight: 700; color: var(--text-primary); letter-spacing: 0.5px; }
.admin-sidebar .admin-brand .subtitle { font-size: 10px; color: var(--text-faint); }
.admin-sidebar .nav-group { font-size: 9px; color: var(--text-faint); padding: 14px 14px 6px; text-transform: uppercase; letter-spacing: 0.8px; }
.admin-sidebar .nav-list { display: flex; flex-direction: column; gap: 1px; padding: 0 10px; }
.admin-sidebar .nav-item {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 12px; border-radius: 7px; font-size: 12.5px;
    color: var(--text-muted); cursor: pointer; transition: all 0.15s ease;
    text-decoration: none; position: relative;
}
.admin-sidebar .nav-item:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.admin-sidebar .nav-item.active { background: var(--accent-soft); color: var(--info); font-weight: 600; }
.admin-sidebar .nav-item.active::before {
    content: ''; position: absolute; left: -10px; top: 50%;
    transform: translateY(-50%); width: 3px; height: 16px;
    background: var(--accent); border-radius: 0 3px 3px 0;
}
.admin-sidebar .nav-item .mi { font-size: 18px; width: 20px; height: 20px; }
.admin-sidebar .nav-item .badge-count { margin-left: auto; background: #EA580C; color: #fff; font-size: 8px; padding: 1px 7px; border-radius: 8px; font-weight: 600; }
.admin-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.admin-topbar { padding: 12px 24px; background: var(--bg-secondary); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 20; }
.admin-topbar .page-title { font-size: 14px; font-weight: 600; color: var(--text-primary); letter-spacing: 0.3px; }
.admin-topbar .topbar-right { display: flex; align-items: center; gap: 10px; }

/* 顶栏图标按钮 */
.topbar-icon-btn {
    width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center;
    background: transparent; border: 1px solid transparent; border-radius: 9px;
    color: var(--text-muted); cursor: pointer; transition: all .2s;
}
.topbar-icon-btn:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.topbar-bell {
    width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center;
    border-radius: 9px; color: var(--text-muted); text-decoration: none; transition: all .2s;
}
.topbar-bell:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.topbar-bell .topbar-icon { font-size: 22px; }

/* 右上角用户菜单 */
.user-menu { position: relative; }
.user-menu > summary.user-menu-trigger { list-style: none; }
.user-menu > summary.user-menu-trigger::-webkit-details-marker { display: none; }
.user-menu-trigger {
    display: flex; align-items: center; gap: 9px; padding: 4px 8px 4px 5px;
    background: transparent; border: 1px solid var(--border); border-radius: 10px;
    cursor: pointer; transition: border-color .2s, background .2s;
}
.user-menu-trigger:hover { border-color: var(--border-light); background: var(--bg-tertiary); }
.user-menu-trigger .um-avatar {
    width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0;
    background: linear-gradient(135deg,#3B82F6,#8B5CF6);
    color: #fff; font-size: 12px; font-weight: 700;
    display: inline-flex; align-items: center; justify-content: center;
}
.user-menu-trigger .um-avatar-img { object-fit: cover; overflow: hidden; }
.user-menu-trigger .um-meta { text-align: left; line-height: 1.25; }
.user-menu-trigger .um-name { font-size: 12px; font-weight: 600; color: var(--text-primary); max-width: 170px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
.user-menu-trigger .um-role { font-size: 10px; color: var(--text-faint); }
.user-menu-trigger .um-caret { color: var(--text-faint); font-size: 10px; transition: transform .2s; }
.user-menu.open .user-menu-trigger { border-color: var(--accent-border); }
.user-menu.open .um-caret { transform: rotate(180deg); }

.user-dropdown {
    position: absolute; top: calc(100% + 8px); right: 0; min-width: 210px;
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.45); padding: 6px; z-index: 50;
    animation: um-pop .16s ease;
}
@keyframes um-pop { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }
.user-dropdown .ud-head {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 10px 10px; border-bottom: 1px solid var(--border); margin-bottom: 5px;
}
.user-dropdown .ud-avatar-img,
.user-dropdown .ud-avatar-fallback {
    width: 38px; height: 38px; border-radius: 10px; flex-shrink: 0;
}
.user-dropdown .ud-avatar-img { object-fit: cover; }
.user-dropdown .ud-avatar-fallback {
    display: inline-flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg,#3B82F6,#8B5CF6);
    color: #fff; font-size: 16px; font-weight: 700;
}
.user-dropdown .ud-head .ud-email { font-size: 12.5px; font-weight: 600; color: var(--text-primary); word-break: break-all; }
.user-dropdown .ud-head .ud-sub { font-size: 10.5px; color: var(--text-faint); margin-top: 2px; }
.user-dropdown a {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 10px; border-radius: 8px; font-size: 12.5px;
    color: var(--text-secondary); text-decoration: none; transition: background .15s, color .15s;
}
.user-dropdown a:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.user-dropdown a .mi { font-size: 17px; }
.user-dropdown a.ud-danger { color: var(--error); }
.user-dropdown a.ud-danger:hover { background: rgba(239,68,68,0.12); }

/* 下拉内的管理员主题切换 */
.user-dropdown .ud-theme { margin-top: 5px; padding-top: 7px; border-top: 1px solid var(--border); }
.user-dropdown .ud-theme-label { font-size: 10px; color: var(--text-faint); padding: 2px 10px 5px; letter-spacing: 0.3px; }
.user-dropdown .ud-theme-opt {
    width: 100%; display: flex; align-items: center; gap: 10px;
    padding: 8px 10px; border: none; background: transparent; border-radius: 8px;
    color: var(--text-secondary); font-size: 12.5px; font-family: inherit; text-align: left;
    cursor: pointer; transition: background .15s, color .15s;
}
.user-dropdown .ud-theme-opt:hover:not(:disabled) { background: var(--bg-tertiary); color: var(--text-primary); }
.user-dropdown .ud-theme-opt:disabled { opacity: .6; cursor: wait; }
.user-dropdown .ud-theme-opt.active { color: var(--info); }
.user-dropdown .ud-theme-opt .mi { font-size: 17px; }
.user-dropdown .ud-theme-opt .ud-check { margin-left: auto; font-size: 15px; }
.user-menu-backdrop { position: fixed; inset: 0; z-index: 40; background: transparent; border: none; padding: 0; cursor: default; }

.admin-content { padding: 24px; flex: 1; overflow-y: auto; }

/* 统计卡片 */
.admin-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 24px; }
.admin-stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; transition: border-color .2s, transform .2s; position: relative; overflow: hidden; }
.admin-stat-card:hover { border-color: rgba(59,130,246,0.35); transform: translateY(-1px); }
.admin-stat-card .stat-accent { position: absolute; right: -10px; top: -10px; width: 60px; height: 60px; background: linear-gradient(135deg, rgba(59,130,246,0.15), transparent); border-radius: 50%; pointer-events: none; }
.admin-stat-card .label { font-size: 11px; color: var(--text-faint); margin-bottom: 6px; }
.admin-stat-card .value { font-size: 24px; font-weight: 800; color: var(--text-primary); letter-spacing: -0.5px; }
.admin-stat-card .change { font-size: 10.5px; margin-top: 6px; color: var(--text-muted); }
.change-up { color: var(--success); }
.change-warn { color: var(--warning); }

/* 表格 */
.admin-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.admin-table th { background: var(--bg-secondary); color: var(--text-faint); text-align: left; padding: 11px 14px; font-weight: 600; border-bottom: 1px solid var(--border); font-size: 11px; text-transform: uppercase; letter-spacing: 0.4px; }
.admin-table td { padding: 11px 14px; border-bottom: 1px solid var(--border); color: var(--text-secondary); }
.admin-table tbody tr:hover td { background: rgba(59,130,246,0.04); }
.admin-table td.cell-title { max-width: 240px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 状态标签 */
.status-pill { font-size: 10px; padding: 3px 9px; border-radius: 20px; font-weight: 500; letter-spacing: 0.3px; }
.status-published { background: rgba(16,185,129,0.12); color: var(--success); }
.status-draft { background: rgba(245,158,11,0.12); color: var(--warning); }
.status-pending { background: rgba(245,158,11,0.12); color: var(--warning); }
.status-approved { background: rgba(16,185,129,0.12); color: var(--success); }
.status-rejected { background: rgba(239,68,68,0.12); color: var(--error); }

/* 通用后台卡片 */
.admin-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.admin-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.admin-card-title { font-size: 12.5px; font-weight: 700; color: var(--text-primary); letter-spacing: 0.3px; }
.admin-card-subtitle { font-size: 11.5px; color: var(--text-faint); margin: -6px 0 18px; }
.admin-grid-2 { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; }
.quick-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* 按钮 */
.btn-primary, .btn-secondary, .btn-ghost, .btn-danger { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border-radius: 7px; font-size: 12px; font-weight: 600; text-decoration: none; border: none; cursor: pointer; transition: all .15s ease; font-family: inherit; line-height: 1.4; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(59,130,246,0.35); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); color: var(--info); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid transparent; padding: 5px 10px; font-size: 11px; }
.btn-ghost:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.btn-danger { background: rgba(239,68,68,0.08); color: var(--error); border: 1px solid rgba(239,68,68,0.25); padding: 5px 10px; font-size: 11px; }
.btn-danger:hover { background: rgba(239,68,68,0.15); }

/* 空状态 */
.empty-state { text-align: center; padding: 32px 16px; color: var(--text-faint); font-size: 12px; }

/* 账号安全 / 修改密码 */
.account-field { margin-bottom: 18px; }
.account-field > label { display: block; font-size: 12px; font-weight: 600; color: var(--text-secondary); margin-bottom: 7px; }
.account-field .validation-message { display: block; margin-top: 5px; }
.account-actions { margin-top: 24px; display: flex; gap: 10px; }
.account-input { width: 100%; }

/* 账号安全 / 头像编辑器 */
.avatar-editor { display: flex; align-items: center; gap: 16px; }
.avatar-preview {
    width: 72px; height: 72px; border-radius: 18px; flex-shrink: 0; object-fit: cover;
    border: 1px solid var(--border); display: inline-block;
}
.avatar-preview-fallback {
    display: inline-flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg,#3B82F6,#8B5CF6);
    color: #fff; font-size: 30px; font-weight: 800;
}
.avatar-editor-ops { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.avatar-remove-btn { padding: 5px 12px; font-size: 11.5px; }

/* Admin 响应式 */
@media (max-width: 768px) {
    .admin-sidebar { width: 60px; }
    .admin-sidebar .admin-brand .title,
    .admin-sidebar .admin-brand .subtitle,
    .admin-sidebar .nav-item span:not(.mi),
    .admin-sidebar .nav-item .badge-count,
    .admin-sidebar .nav-group { display: none; }
    .admin-sidebar .nav-item.active::before { left: -6px; }
    .admin-stats { grid-template-columns: repeat(2, 1fr); }
    .admin-grid-2 { grid-template-columns: 1fr; }
    .user-menu-trigger .um-meta, .user-menu-trigger .um-caret { display: none; }
}