:root {
    --c-primary-h: 231; --c-primary-s: 67%; --c-primary-l: 63%;
    --c-primary: hsl(var(--c-primary-h), var(--c-primary-s), var(--c-primary-l));
    --c-primary-light: hsl(var(--c-primary-h), var(--c-primary-s), calc(var(--c-primary-l) + 12%));
    --c-primary-dark: hsl(var(--c-primary-h), var(--c-primary-s), calc(var(--c-primary-l) - 12%));
    --c-primary-bg: hsl(var(--c-primary-h), var(--c-primary-s), 95%);
    --c-success: #2dce89; --c-warning: #fb6340; --c-info: #11cdef;
    --c-tag-bg: hsl(var(--c-primary-h), 30%, 93%);
    --c-tag-text: hsl(var(--c-primary-h), 30%, 40%);

    --c-text: hsl(220, 15%, 18%); --c-text-secondary: hsl(220, 8%, 42%);
    --c-text-muted: hsl(220, 5%, 60%); --c-border: hsl(220, 13%, 88%);
    --c-bg: #ffffff; --c-bg-secondary: #f7f8fa; --c-bg-card: #ffffff;
    --c-shadow-sm: 0 1px 3px rgba(0,0,0,.06); --c-shadow: 0 4px 16px rgba(0,0,0,.07);
    --c-shadow-lg: 0 12px 40px rgba(0,0,0,.1);

    --sidebar-width: 270px; --topbar-height: 56px;
    --radius-sm: 6px; --radius: 10px; --radius-lg: 16px;
    --font-sans: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    --font-mono: "SF Mono","Fira Code","Cascadia Code",Consolas,monospace;
    --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}
[data-theme="dark"] {
    --c-text: hsl(220,10%,88%); --c-text-secondary: hsl(220,6%,60%);
    --c-text-muted: hsl(220,5%,44%); --c-border: hsl(220,8%,22%);
    --c-bg: hsl(224,15%,9%); --c-bg-secondary: hsl(224,10%,13%); --c-bg-card: hsl(224,12%,14%);
    --c-shadow-sm: 0 1px 3px rgba(0,0,0,.3); --c-shadow: 0 4px 16px rgba(0,0,0,.4);
    --c-shadow-lg: 0 12px 40px rgba(0,0,0,.5);
    --c-tag-bg: hsl(231,20%,18%); --c-tag-text: hsl(231,20%,60%);
    --c-primary-bg: hsl(var(--c-primary-h),30%,12%);
}

*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 15px; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); color: var(--c-text); background: transparent; line-height: 1.7; overflow-x: hidden; }
a { color: var(--c-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-primary-dark); }
img { max-width: 100%; height: auto; display: block; }
code { font-family: var(--font-mono); font-size: .9em; background: var(--c-tag-bg); color: var(--c-tag-text); padding: 2px 6px; border-radius: 3px; }
pre { background: var(--c-bg-secondary); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 16px 20px; overflow-x: auto; margin: 16px 0; font-size: .88em; line-height: 1.6; }
pre code { background: none; padding: 0; color: var(--c-text); }
blockquote { border-left: 3px solid var(--c-primary); padding: 12px 20px; margin: 20px 0; background: var(--c-bg-secondary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--c-text-secondary); }
table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: .92em; }
th,td { padding: 10px 14px; border: 1px solid var(--c-border); text-align: left; }
th { background: var(--c-bg-secondary); font-weight: 600; }
ul,ol { padding-left: 24px; margin: 12px 0; }
li { margin: 4px 0; }

.reading-progress { position: fixed; top: 0; left: 0; height: 3px; background: var(--c-primary); z-index: 1001; width: 0; transition: width .1s linear; }
.site-wrapper { display: flex; min-height: 100vh; max-width: 1280px; margin: 0 auto; position: relative; z-index: 1; }
.back-to-top { position: fixed; bottom: 32px; right: 32px; width: 44px; height: 44px; border-radius: 50%; background: var(--c-primary); color: #fff; border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; opacity: 0; transform: translateY(20px); transition: all var(--transition); z-index: 100; box-shadow: var(--c-shadow); pointer-events: none; }
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { background: var(--c-primary-dark); transform: translateY(-2px); }

/* Sidebar */
.sidebar { width: var(--sidebar-width); min-width: var(--sidebar-width); background: var(--c-bg); border-right: 1px solid var(--c-border); position: sticky; top: 0; height: 100vh; overflow-y: auto; z-index: 50; display: flex; flex-direction: column; }
.sidebar-banner { background: linear-gradient(135deg, var(--c-primary), hsl(var(--c-primary-h),80%,50%)); padding: 28px 20px 24px; text-align: center; color: #fff; position: relative; border-radius: 0 0 var(--radius-lg) 0; }
.sidebar-banner::after { content: ''; position: absolute; top: -60px; right: -60px; width: 160px; height: 160px; border-radius: 50%; background: rgba(255,255,255,.08); pointer-events: none; }
.sidebar-avatar { width: 72px; height: 72px; border-radius: 50%; margin: 0 auto 12px; border: 3px solid rgba(255,255,255,.3); object-fit: cover; position: relative; z-index: 1; will-change: transform; transform: translateZ(0); }
.sidebar-name { font-size: 1.05em; font-weight: 700; margin-bottom: 2px; position: relative; z-index: 1; }
.sidebar-tagline { font-size: .8em; opacity: .75; line-height: 1.5; position: relative; z-index: 1; }
.sidebar-social { display: flex; justify-content: center; gap: 14px; margin-top: 10px; position: relative; z-index: 1; }
.sidebar-social a { color: rgba(255,255,255,.7); transition: color var(--transition), transform var(--transition); display: flex; }
.sidebar-social a:hover { color: #fff; transform: translateY(-1px); }

.sidebar-card { padding: 14px 20px 10px; border-bottom: 1px solid var(--c-border); }
.sidebar-title { font-size: .78em; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; color: var(--c-text-muted); margin-bottom: 8px; }
.sidebar-search { position: relative; }
.sidebar-search svg { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); width: 15px; color: var(--c-text-muted); pointer-events: none; }
.sidebar-search input { width: 100%; padding: 8px 12px 8px 32px; border: 1px solid var(--c-border); border-radius: 20px; font-size: .85em; background: var(--c-bg-secondary); color: var(--c-text); outline: none; transition: border-color var(--transition), box-shadow var(--transition); }
.sidebar-search input:focus { border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(94,114,228,.12); }
.sidebar-menu { list-style: none; padding: 0; margin: 0; }
.sidebar-menu li { margin: 0; }
.sidebar-menu a { display: flex; align-items: center; gap: 8px; padding: 7px 0; color: var(--c-text-secondary); font-size: .9em; transition: color var(--transition); border-radius: var(--radius-sm); }
.sidebar-menu a:hover,.sidebar-menu a.active { color: var(--c-primary); }
.sidebar-menu .icon { width: 16px; height: 16px; flex-shrink: 0; }
.sidebar-categories { display: flex; flex-direction: column; gap: 4px; }
.sidebar-cat { display: flex; justify-content: space-between; font-size: .85em; color: var(--c-text-secondary); padding: 2px 0; transition: color var(--transition); }
.sidebar-cat:hover { color: var(--c-primary); }
.sidebar-tags { display: flex; flex-wrap: wrap; gap: 5px; }
.sidebar-tags a { font-size: .78em; padding: 3px 8px; border-radius: 12px; background: var(--c-tag-bg); color: var(--c-tag-text); transition: all var(--transition); }
.sidebar-tags a:hover { background: var(--c-primary); color: #fff; }

.sidebar-mask { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 49; }

/* Topbar */
.topbar { position: sticky; top: 0; z-index: 40; height: var(--topbar-height); background: rgba(255,255,255,.85); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--c-border); display: flex; align-items: center; justify-content: space-between; padding: 0 24px; }
[data-theme="dark"] .topbar { background: rgba(26,28,36,.85); }
.topbar-hamburger { display: none; background: none; border: none; color: var(--c-text); cursor: pointer; padding: 6px; border-radius: var(--radius-sm); }
.topbar-hamburger:hover { background: var(--c-bg-secondary); }
.topbar-greeting { font-size: .92em; color: var(--c-text-secondary); }
.topbar-btn { background: none; border: none; color: var(--c-text-secondary); cursor: pointer; width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: all var(--transition); }
.topbar-btn:hover { background: var(--c-bg-secondary); color: var(--c-text); }
.main-content { flex: 1; min-width: 0; display: flex; flex-direction: column; }

/* Hero */
.hero { position: relative; margin: 0 0 32px; background: linear-gradient(135deg, var(--c-primary) 0%, hsl(var(--c-primary-h),80%,35%) 100%); color: #fff; padding: 48px 40px; overflow: hidden; border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
.hero::after { content: ''; position: absolute; top: -120px; right: -80px; width: 300px; height: 300px; border-radius: 50%; background: rgba(255,255,255,.08); }
.hero-content { position: relative; z-index: 1; }
.hero-title { font-size: 1.9em; font-weight: 800; margin-bottom: 12px; }
.hero-subtitle { font-size: 1em; opacity: .85; max-width: 560px; line-height: 1.6; }

/* Post cards */
.posts-grid { padding: 0 24px 32px; display: flex; flex-direction: column; gap: 24px; }
.post-card { background: var(--c-bg); border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; transition: transform var(--transition), box-shadow var(--transition); display: flex; flex-direction: column; }
.post-card:hover { transform: translateY(-2px); box-shadow: var(--c-shadow); }
.post-card-cover { position: relative; height: 180px; overflow: hidden; }
.post-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.post-card:hover .post-card-cover img { transform: scale(1.03); }
.post-card-cat { position: absolute; top: 12px; left: 12px; background: var(--c-primary); color: #fff; font-size: .75em; padding: 3px 10px; border-radius: 12px; font-weight: 500; }
.post-card-body { padding: 20px 24px; }
.post-card-title { font-size: 1.15em; font-weight: 700; margin-bottom: 8px; line-height: 1.5; }
.post-card-title a { color: var(--c-text); }
.post-card-title a:hover { color: var(--c-primary); }
.post-card-meta { font-size: .82em; color: var(--c-text-muted); display: flex; align-items: center; flex-wrap: wrap; gap: 4px; margin-bottom: 12px; }
.post-card-meta svg { width: 13px; height: 13px; vertical-align: -2px; margin-right: 2px; }
.meta-divider { color: var(--c-border); }
.post-card-excerpt { font-size: .9em; color: var(--c-text-secondary); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 14px; }
.post-card-footer { display: flex; justify-content: space-between; align-items: center; }
.post-card-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.post-card-tags a { font-size: .78em; padding: 3px 8px; border-radius: 12px; background: var(--c-tag-bg); color: var(--c-tag-text); transition: all var(--transition); }
.post-card-tags a:hover { background: var(--c-primary); color: #fff; }
.post-card-more { font-size: .85em; color: var(--c-primary); font-weight: 500; transition: color var(--transition); white-space: nowrap; }
.post-card-more:hover { color: var(--c-primary-dark); }

@media (min-width: 768px) {
    .post-card { flex-direction: row; }
    .post-card-cover { width: 260px; min-width: 260px; height: auto; }
    .post-card-body { flex: 1; }
}

/* Pagination */
.pagination { display: flex; justify-content: center; gap: 6px; padding: 24px; }
.pagination a,.pagination span { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: var(--radius-sm); font-size: .9em; border: 1px solid var(--c-border); color: var(--c-text-secondary); transition: all var(--transition); }
.pagination a:hover { border-color: var(--c-primary); color: var(--c-primary); background: var(--c-primary-bg); }
.pagination .page-current { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* Article page */
.article-cover { position: relative; height: 320px; overflow: hidden; display: flex; align-items: flex-end; }
.article-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.article-cover-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,.7) 0%, rgba(0,0,0,.15) 60%, transparent 100%); }
.article-cover-content { position: relative; z-index: 1; padding: 40px 32px 32px; color: #fff; max-width: 800px; }
.article-cover-cat { display: inline-block; font-size: .8em; background: var(--c-primary); padding: 2px 10px; border-radius: 12px; margin-bottom: 12px; }
.article-cover-title { font-size: 1.6em; font-weight: 800; line-height: 1.4; margin-bottom: 8px; }
.article-cover-meta { font-size: .85em; opacity: .85; display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.article-cover-meta svg { width: 14px; height: 14px; vertical-align: -2px; margin-right: 2px; opacity: .8; }
.article-layout { display: flex; gap: 40px; padding: 32px 32px 24px; position: relative; }
.article-toc { width: 200px; min-width: 200px; position: sticky; top: calc(var(--topbar-height) + 20px); align-self: flex-start; }
.toc-title { font-size: .85em; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--c-text-muted); margin-bottom: 12px; }
.toc-nav { display: flex; flex-direction: column; gap: 2px; }
.toc-nav a { font-size: .83em; color: var(--c-text-muted); padding: 4px 8px; border-left: 2px solid transparent; transition: all var(--transition); line-height: 1.4; }
.toc-nav a:hover,.toc-nav a.toc-active { color: var(--c-primary); border-left-color: var(--c-primary); background: var(--c-primary-bg); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.article-body { flex: 1; min-width: 0; padding: 12px 0; }
.article-body h2 { font-size: 1.3em; margin: 32px 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--c-border); }
.article-body h3 { font-size: 1.1em; margin: 24px 0 10px; }
.article-body p { margin: 0 0 14px; line-height: 1.85; color: var(--c-text-secondary); }
.article-body strong { color: var(--c-text); }
.article-meta-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 24px; }
.article-meta-tags a { font-size: .8em; padding: 4px 10px; border-radius: 14px; background: var(--c-tag-bg); color: var(--c-tag-text); transition: all var(--transition); }
.article-meta-tags a:hover { background: var(--c-primary); color: #fff; }
.article-footer { margin: 32px 0 16px; padding-top: 20px; border-top: 1px solid var(--c-border); }
.article-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; }
.article-tags a { font-size: .78em; padding: 4px 10px; border-radius: 12px; background: var(--c-tag-bg); color: var(--c-tag-text); transition: all var(--transition); }
.article-tags a:hover { background: var(--c-primary); color: #fff; }
.article-share { display: flex; align-items: center; gap: 10px; font-size: .85em; color: var(--c-text-muted); }
.article-share a { color: var(--c-text-muted); display: flex; transition: color var(--transition); }
.article-share a:hover { color: var(--c-primary); }
.article-prev-next { display: flex; justify-content: space-between; gap: 20px; padding: 24px 32px 32px; }
.article-prev,.article-next { flex: 1; padding: 16px 20px; border: 1px solid var(--c-border); border-radius: var(--radius); transition: all var(--transition); }
.article-prev:hover,.article-next:hover { border-color: var(--c-primary); box-shadow: var(--c-shadow-sm); }
.article-next { text-align: right; }
.article-prev-next-label { font-size: .78em; color: var(--c-text-muted); display: block; margin-bottom: 2px; }
.article-prev-next-title { color: var(--c-text); font-weight: 500; }

@media (max-width: 900px) {
    .article-layout { flex-direction: column; gap: 16px; }
    .article-toc { display: none; }
    .article-cover { height: 220px; }
    .article-cover-title { font-size: 1.3em; }
    .article-prev-next { flex-direction: column; }
}

/* About page */
.about-card { background: var(--c-bg); border: 1px solid var(--c-border); border-radius: var(--radius-lg); overflow: hidden; margin: 0 24px 32px; }
.about-banner { height: 160px; background: linear-gradient(135deg, var(--c-primary), hsl(var(--c-primary-h),60%,40%)); }
.about-header { text-align: center; padding: 0 32px 20px; margin-top: -48px; }
.about-avatar { width: 100px; height: 100px; border-radius: 50%; border: 4px solid var(--c-bg); margin: 0 auto 12px; object-fit: cover; box-shadow: var(--c-shadow-sm); }
.about-name { font-size: 1.5em; font-weight: 800; margin-bottom: 2px; }
.about-role { font-size: .9em; color: var(--c-text-muted); }
.about-body { padding: 0 32px 32px; max-width: 720px; margin: 0 auto; }
.about-body p { color: var(--c-text-secondary); margin-bottom: 12px; line-height: 1.8; }
.about-section-title { font-size: 1.05em; font-weight: 700; margin: 28px 0 12px; color: var(--c-text); }
.skills { display: flex; flex-wrap: wrap; gap: 8px; }
.skill { font-size: .82em; padding: 5px 12px; border-radius: 16px; background: var(--c-tag-bg); color: var(--c-tag-text); }
.contact-row { display: grid; grid-template-columns: repeat(auto-fill,minmax(200px,1fr)); gap: 12px; margin-top: 8px; }
.contact-card { display: flex; align-items: center; gap: 12px; padding: 14px 16px; border: 1px solid var(--c-border); border-radius: var(--radius); transition: all var(--transition); color: var(--c-text); }
.contact-card:hover { border-color: var(--c-primary); box-shadow: var(--c-shadow-sm); transform: translateY(-1px); }
.contact-icon { width: 40px; height: 40px; border-radius: 50%; background: var(--c-primary-bg); display: flex; align-items: center; justify-content: center; color: var(--c-primary); flex-shrink: 0; }
.contact-label { font-size: .75em; color: var(--c-text-muted); }
.contact-value { font-size: .88em; font-weight: 500; }

/* Archive page */
.archive-page { padding: 0 24px 32px; }
.archive-year { margin-bottom: 32px; }
.archive-year-title { font-size: 1.4em; font-weight: 700; color: var(--c-primary); margin-bottom: 12px; }
.archive-list { display: flex; flex-direction: column; gap: 2px; }
.archive-item { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-radius: var(--radius-sm); transition: background var(--transition); }
.archive-item:hover { background: var(--c-bg-secondary); }
.archive-date { font-family: var(--font-mono); font-size: .85em; color: var(--c-text-muted); white-space: nowrap; min-width: 48px; }
.archive-link { flex: 1; color: var(--c-text); font-weight: 500; font-size: .92em; }
.archive-link:hover { color: var(--c-primary); }
.archive-cat { font-size: .78em; background: var(--c-tag-bg); color: var(--c-tag-text); padding: 2px 8px; border-radius: 10px; white-space: nowrap; }

/* Categories page */
.categories-page { padding: 0 24px 32px; }
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(180px,1fr)); gap: 12px; margin-bottom: 36px; }
.cat-card { display: flex; justify-content: space-between; align-items: center; padding: 16px 18px; border: 1px solid var(--c-border); border-radius: var(--radius); transition: all var(--transition); color: var(--c-text); }
.cat-card:hover { border-color: var(--c-primary); background: var(--c-primary-bg); transform: translateY(-2px); }
.cat-name { font-weight: 600; font-size: .95em; }
.cat-count { font-size: .82em; color: var(--c-text-muted); }
.tag-cloud-title { font-size: 1.05em; font-weight: 700; margin-bottom: 16px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a { padding: 6px 14px; border-radius: 16px; background: var(--c-tag-bg); color: var(--c-tag-text); font-size: .82em; transition: all var(--transition); }
.tag-cloud a:hover { background: var(--c-primary); color: #fff; }
.tag-size-1 { --scale: 0.85; } .tag-size-2 { --scale: 1; } .tag-size-3 { --scale: 1.15; } .tag-size-4 { --scale: 1.3; }
.tag-cloud a { transform: scale(var(--scale,1)); }

/* 404 page */
.error-page { text-align: center; padding: 80px 24px; flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.error-code { font-size: 6em; font-weight: 900; color: var(--c-primary); line-height: 1; margin-bottom: 8px; opacity: .7; }
.error-title { font-size: 1.5em; margin-bottom: 12px; }
.error-desc { color: var(--c-text-secondary); margin-bottom: 32px; max-width: 400px; }
.error-actions { display: flex; gap: 12px; }
.error-btn { padding: 10px 24px; border-radius: var(--radius); border: 1px solid var(--c-border); color: var(--c-text); font-size: .92em; transition: all var(--transition); }
.error-btn:hover { border-color: var(--c-primary); }
.error-btn-primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.error-btn-primary:hover { background: var(--c-primary-dark); }

/* Footer */
.site-footer { text-align: center; padding: 24px; color: var(--c-text-muted); font-size: .82em; border-top: 1px solid var(--c-border); margin-top: auto; }
.site-footer a { color: var(--c-primary); }

/* Animations */
.fade-up { animation: fadeUp 0.5s ease both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

/* Responsive */
@media (max-width: 1024px) {
    .sidebar { width: 250px; min-width: 250px; }
    .hero { padding: 36px 28px; }
    .hero-title { font-size: 1.6em; }
}
@media (max-width: 900px) {
    .sidebar { position: fixed; left: -100%; transition: left .3s ease; width: 280px; min-width: 280px; }
    .sidebar.open { left: 0; }
    .sidebar-mask.open { display: block; }
    .topbar-hamburger { display: flex; }
    .hero { margin: 0; border-radius: 0; padding: 28px 20px; }
    .hero-title { font-size: 1.3em; }
    .posts-grid { padding: 0 16px 24px; }
    .back-to-top { bottom: 20px; right: 20px; }
    .article-cover-content { padding: 28px 20px 24px; }
    .article-layout { padding: 24px 20px 16px; }
    .about-body { padding: 0 20px 24px; }
    .contact-row { grid-template-columns: 1fr; }
    .cat-grid { grid-template-columns: repeat(auto-fill,minmax(140px,1fr)); }
}
@media (max-width: 600px) {
    .post-card-cover { height: 140px; }
    .post-card-body { padding: 16px; }
    .post-card-title { font-size: 1.05em; }
    .hero { border-radius: 0; }
}

/* ====== Notification Bar ====== */
.notice-bar { position: sticky; top: var(--topbar-height); z-index: 39; background: var(--c-primary-bg); color: var(--c-primary); font-size: .85em; padding: 10px 24px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid hsl(var(--c-primary-h), var(--c-primary-s), 88%); transition: all var(--transition); }
[data-theme="dark"] .notice-bar { border-bottom-color: hsl(var(--c-primary-h),20%,22%); }
.notice-bar.dismissed { display: none; }
.notice-bar-text { display: flex; align-items: center; gap: 8px; }
.notice-bar-close { background: none; border: none; color: var(--c-primary); cursor: pointer; padding: 2px; border-radius: 50%; display: flex; opacity: .6; transition: opacity var(--transition); }
.notice-bar-close:hover { opacity: 1; }

/* ====== Search Modal ====== */
.search-overlay { position: fixed; inset: 0; z-index: 1000; background: rgba(0,0,0,.5); display: flex; align-items: flex-start; justify-content: center; padding-top: 15vh; opacity: 0; pointer-events: none; transition: opacity .2s ease; }
.search-overlay.active { opacity: 1; pointer-events: auto; }
.search-modal { background: var(--c-bg); border-radius: var(--radius-lg); width: 90%; max-width: 600px; max-height: 70vh; display: flex; flex-direction: column; box-shadow: var(--c-shadow-lg); overflow: hidden; }
.search-modal-header { padding: 16px 20px; border-bottom: 1px solid var(--c-border); display: flex; align-items: center; gap: 10px; }
.search-modal-header svg { color: var(--c-text-muted); flex-shrink: 0; }
.search-modal-header input { flex: 1; border: none; background: none; font-size: 1em; color: var(--c-text); outline: none; font-family: inherit; }
.search-modal-header kbd { font-size: .75em; padding: 2px 6px; border-radius: 3px; background: var(--c-bg-secondary); color: var(--c-text-muted); border: 1px solid var(--c-border); }
.search-modal-body { overflow-y: auto; padding: 8px 0; }
.search-empty { text-align: center; padding: 40px; color: var(--c-text-muted); }
.search-result { display: flex; flex-direction: column; padding: 12px 20px; transition: background var(--transition); cursor: pointer; }
.search-result:hover { background: var(--c-bg-secondary); }
.search-result-title { font-weight: 600; font-size: .95em; color: var(--c-text); line-height: 1.4; }
.search-result-excerpt { font-size: .82em; color: var(--c-text-muted); margin-top: 4px; }
.search-result-meta { font-size: .75em; color: var(--c-text-muted); margin-top: 4px; display: flex; gap: 10px; }

/* ====== Lightbox ====== */
.lightbox { position: fixed; inset: 0; z-index: 2000; background: rgba(0,0,0,.92); display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transition: opacity .25s ease; }
.lightbox.active { opacity: 1; pointer-events: auto; }
.lightbox img { max-width: 90vw; max-height: 85vh; object-fit: contain; border-radius: var(--radius); }
.lightbox-close { position: absolute; top: 20px; right: 20px; background: rgba(255,255,255,.15); border: none; color: #fff; width: 40px; height: 40px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 1.2em; transition: background var(--transition); }
.lightbox-close:hover { background: rgba(255,255,255,.25); }
.lightbox-prev,.lightbox-next { position: absolute; top: 50%; transform: translateY(-50%); background: rgba(255,255,255,.1); border: none; color: #fff; width: 44px; height: 44px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background var(--transition); }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }
.lightbox-prev:hover,.lightbox-next:hover { background: rgba(255,255,255,.2); }

/* ====== Code Block Enhanced ====== */
.code-block-wrapper { position: relative; margin: 16px 0; }
.code-block-wrapper pre { margin: 0; }
.code-block-topbar { display: flex; justify-content: space-between; align-items: center; padding: 6px 14px; background: var(--c-bg-secondary); border: 1px solid var(--c-border); border-bottom: none; border-radius: var(--radius) var(--radius) 0 0; font-size: .78em; color: var(--c-text-muted); }
.code-block-topbar + pre { border-radius: 0 0 var(--radius) var(--radius); margin-top: 0; }
.copy-btn { background: none; border: 1px solid var(--c-border); color: var(--c-text-muted); cursor: pointer; padding: 3px 10px; border-radius: var(--radius-sm); font-size: .85em; transition: all var(--transition); display: flex; align-items: center; gap: 4px; }
.copy-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.copy-btn.copied { background: var(--c-success); border-color: var(--c-success); color: #fff; }

/* ====== Share Buttons ====== */
.share-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.share-btn { display: flex; align-items: center; gap: 4px; padding: 6px 14px; border-radius: 20px; font-size: .82em; border: none; cursor: pointer; color: #fff; transition: all var(--transition); }
.share-btn.weibo { background: #e6162d; }
.share-btn.qzone { background: #ffce00; color: #333; }
.share-btn.copy { background: var(--c-text-secondary); }
.share-btn:hover { opacity: .85; transform: translateY(-1px); }

/* ====== Floating TOC Button (Mobile) ====== */
.float-toc-btn { position: fixed; bottom: 88px; right: 32px; width: 44px; height: 44px; border-radius: 50%; background: var(--c-bg); border: 1px solid var(--c-border); cursor: pointer; display: none; align-items: center; justify-content: center; z-index: 99; box-shadow: var(--c-shadow); color: var(--c-text-secondary); transition: all var(--transition); }
.float-toc-btn:hover { color: var(--c-primary); border-color: var(--c-primary); }
.toc-drawer { position: fixed; inset: 0; z-index: 1000; display: flex; justify-content: flex-end; opacity: 0; pointer-events: none; transition: opacity .2s ease; }
.toc-drawer.active { opacity: 1; pointer-events: auto; }
.toc-drawer-mask { position: absolute; inset: 0; background: rgba(0,0,0,.4); }
.toc-drawer-panel { position: relative; width: 280px; max-width: 90vw; background: var(--c-bg); padding: 24px 20px; overflow-y: auto; }
.toc-drawer-panel .toc-title { margin-bottom: 16px; }

@media (max-width: 900px) {
    .float-toc-btn { display: flex; }
}

/* ====== Skeleton Loading ====== */
.skeleton { background: var(--c-bg-secondary); border-radius: var(--radius); animation: skeleton-pulse 1.5s ease-in-out infinite; }
@keyframes skeleton-pulse {
    0%,100% { opacity: 1; }
    50% { opacity: .4; }
}
.skeleton-title { height: 24px; width: 70%; margin-bottom: 12px; }
.skeleton-meta { height: 14px; width: 40%; margin-bottom: 16px; }
.skeleton-text { height: 14px; width: 100%; margin-bottom: 8px; }
.skeleton-text:last-child { width: 60%; }
.skeleton-cover { height: 200px; margin-bottom: 16px; }

/* ====== Recent Posts Widget ====== */
.recent-posts { display: flex; flex-direction: column; gap: 8px; }
.recent-post-item { display: flex; gap: 8px; align-items: flex-start; padding: 6px 0; }
.recent-post-item img { width: 50px; height: 34px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
.recent-post-info { min-width: 0; }
.recent-post-title { font-size: .82em; color: var(--c-text); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.recent-post-title a { color: var(--c-text); }
.recent-post-title a:hover { color: var(--c-primary); }
.recent-post-date { font-size: .72em; color: var(--c-text-muted); margin-top: 2px; }

/* ====== Mobile Bottom Nav ====== */
.mobile-nav { display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 50; background: var(--c-bg); border-top: 1px solid var(--c-border); padding: 6px 0 env(safe-area-inset-bottom,6px); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
[data-theme="dark"] .mobile-nav { background: rgba(22,24,33,.92); }
.mobile-nav-list { display: flex; justify-content: space-around; }
.mobile-nav-item { display: flex; flex-direction: column; align-items: center; gap: 2px; color: var(--c-text-muted); font-size: .65em; padding: 4px 8px; transition: color var(--transition); }
.mobile-nav-item.active { color: var(--c-primary); }
.mobile-nav-item svg { width: 20px; height: 20px; }
@media (max-width: 900px) { .mobile-nav { display: block; } .site-footer { padding-bottom: 70px; } .back-to-top { bottom: 80px; } }

/* ====== Comment Section (Giscus) ====== */
.comment-section { padding: 0 32px 32px; max-width: 800px; }
.comment-title { font-size: 1.1em; font-weight: 700; margin-bottom: 16px; padding-top: 24px; border-top: 1px solid var(--c-border); }
.giscus-container { min-height: 200px; border-radius: var(--radius); overflow: hidden; }

/* ====== Article Copyright Box ====== */
.copyright-box { background: var(--c-bg-secondary); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 16px 20px; margin: 24px 0; font-size: .85em; color: var(--c-text-secondary); line-height: 1.7; }
.copyright-box .copyright-title { font-weight: 700; color: var(--c-text); margin-bottom: 6px; }
.copyright-box a { color: var(--c-primary); }

/* ====== Site Uptime ====== */
.site-uptime { display: inline-flex; align-items: center; gap: 4px; }
.site-uptime-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--c-success); display: inline-block; animation: uptime-pulse 2s ease-in-out infinite; }
@keyframes uptime-pulse { 0%,100% { opacity: 1; } 50% { opacity: .4; } }

/* ====== Article markdown content enhancements ====== */
.article-body img { border-radius: var(--radius); margin: 20px 0; cursor: zoom-in; }
.article-body .video-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; margin: 20px 0; border-radius: var(--radius); }
.article-body .video-container iframe,.article-body .video-container video { position: absolute; inset: 0; width: 100%; height: 100%; border-radius: var(--radius); }

/* ====== Loading spinner ====== */
.spinner { width: 30px; height: 30px; border: 3px solid var(--c-border); border-top-color: var(--c-primary); border-radius: 50%; animation: spin .6s linear infinite; margin: 20px auto; }
@keyframes spin { to { transform: rotate(360deg); } }