/* ============ Y Blog · Aurora 视觉体系 ============ */
:root {
  --bg: #f5f6fa;
  --bg-soft: #ffffff;
  --bg-hover: #f0f2f7;
  --glass: rgba(255, 255, 255, .72);
  --glass-strong: rgba(255, 255, 255, .88);
  --glass-border: rgba(255, 255, 255, .65);
  --text: #17181c;
  --text-2: #4d5359;
  --text-3: #9096a0;
  --border: rgba(20, 22, 40, .09);
  --accent: #6366f1;
  --accent-2: #0ea5e9;
  --accent-3: #d946ef;
  --accent-soft: rgba(99, 102, 241, .1);
  --grad: linear-gradient(120deg, #6366f1 0%, #0ea5e9 50%, #d946ef 100%);
  --shadow: 0 2px 6px rgba(23, 25, 60, .05), 0 16px 40px -16px rgba(23, 25, 60, .14);
  --shadow-lg: 0 6px 18px rgba(23, 25, 60, .08), 0 32px 64px -20px rgba(23, 25, 60, .22);
  --code-bg: #14161d;
  --code-color: #e6e8ee;
  --radius: 20px;
  --radius-sm: 12px;
}
[data-theme="dark"] {
  --bg: #09090f;
  --bg-soft: #12141c;
  --bg-hover: #1a1d28;
  --glass: rgba(22, 24, 36, .6);
  --glass-strong: rgba(18, 20, 30, .82);
  --glass-border: rgba(255, 255, 255, .08);
  --text: #eceef4;
  --text-2: #a4aab8;
  --text-3: #6b7280;
  --border: rgba(255, 255, 255, .08);
  --accent: #8b8df8;
  --accent-2: #38bdf8;
  --accent-3: #e879f9;
  --accent-soft: rgba(139, 141, 248, .13);
  --shadow: 0 2px 6px rgba(0, 0, 0, .35), 0 20px 48px -16px rgba(0, 0, 0, .55);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, .45), 0 36px 72px -24px rgba(0, 0, 0, .65);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
::selection { background: var(--accent); color: #fff; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg); color: var(--text);
  line-height: 1.85; font-size: 16px;
  transition: background .4s, color .4s;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; transition: color .25s; }
a:hover { color: var(--accent-2); }
img { max-width: 100%; border-radius: var(--radius-sm); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--text-3) 45%, transparent); border-radius: 99px; border: 2.5px solid var(--bg); }
::-webkit-scrollbar-track { background: transparent; }
.wrap { max-width: 900px; margin: 0 auto; padding: 0 22px; }
.wrap-wide { max-width: 1120px; margin: 0 auto; padding: 0 22px; }

/* ============ 阅读进度条 ============ */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 100%;
  transform: scaleX(0); transform-origin: 0 50%; z-index: 99;
  background: var(--grad); pointer-events: none;
}

/* ============ 顶部导航 ============ */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 62%, transparent);
  backdrop-filter: blur(20px) saturate(1.5); -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.logo {
  display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--text);
  letter-spacing: -.3px;
}
.logo:hover { color: var(--text); }
.logo-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--grad); background-size: 200% 200%;
  animation: gradShift 6s ease infinite;
  box-shadow: 0 0 0 5px var(--accent-soft), 0 0 18px var(--accent);
}
@keyframes gradShift { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  color: var(--text-2); padding: 7px 14px; border-radius: 10px; font-size: 15px; font-weight: 500;
  transition: all .25s; position: relative;
}
.nav-links a:hover { color: var(--text); background: var(--bg-hover); }
.nav-links a.on { color: var(--accent); font-weight: 600; }
.nav-links a.on::after {
  content: ''; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 2px;
  border-radius: 2px; background: var(--grad);
}
.theme-btn {
  margin-left: 8px; width: 36px; height: 36px; border: 1px solid var(--border);
  border-radius: 11px; background: var(--glass); color: var(--text-2); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; transition: all .3s;
  backdrop-filter: blur(8px);
}
.theme-btn:hover { color: var(--accent); border-color: var(--accent); transform: rotate(20deg) scale(1.08); }
[data-theme=""] .ico-moon { display: block; } [data-theme=""] .ico-sun { display: none; }
[data-theme="dark"] .ico-sun { display: block; } [data-theme="dark"] .ico-moon { display: none; }

/* ============ 极光背景（全页固定层） ============ */
.hero-wrap { position: relative; margin-top: -67px; padding-top: 67px; }
.aurora {
  position: fixed; inset: 0; overflow: hidden; z-index: 0; pointer-events: none;
}
.aurora::after {
  content: ''; position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: .05; mix-blend-mode: overlay;
}
.blob {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5;
  animation: drift 22s ease-in-out infinite alternate;
}
.blob-1 { width: 680px; height: 680px; top: -260px; left: -180px; background: radial-gradient(circle, rgba(99,102,241,.75), transparent 65%); }
.blob-2 { width: 620px; height: 620px; top: -140px; right: -220px; background: radial-gradient(circle, rgba(14,165,233,.65), transparent 65%); animation-delay: -7s; }
.blob-3 { width: 600px; height: 600px; bottom: -300px; left: 28%; background: radial-gradient(circle, rgba(217,70,239,.5), transparent 65%); animation-delay: -14s; }
[data-theme="dark"] .blob { opacity: .34; }
@keyframes drift {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(70px, 40px) scale(1.15); }
  100% { transform: translate(-40px, -30px) scale(.92); }
}
.hero {
  position: relative; z-index: 1; text-align: center;
  padding: 84px 20px 60px; max-width: 820px; margin: 0 auto;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 18px; border-radius: 99px; font-size: 13.5px; font-weight: 600;
  color: var(--accent); background: var(--glass); border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px); box-shadow: var(--shadow);
  margin-bottom: 26px;
}
.hero-eyebrow .pulse {
  width: 7px; height: 7px; border-radius: 50%; background: #22c55e;
  animation: pulse 1.8s ease infinite;
}
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(34,197,94,.5);} 50% { box-shadow: 0 0 0 6px rgba(34,197,94,0);} }
.hero-title {
  font-size: clamp(34px, 7vw, 58px); font-weight: 900; letter-spacing: -1.5px; line-height: 1.22;
}
.hero-title .grad {
  background: var(--grad); background-size: 200% 200%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: gradShift 8s ease infinite;
}
.hero-sub { color: var(--text-2); margin-top: 20px; font-size: clamp(15px, 2.4vw, 18px); max-width: 560px; margin-inline: auto; }
.hero-stats { display: flex; justify-content: center; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.hstat {
  display: flex; align-items: baseline; gap: 7px;
  padding: 10px 22px; border-radius: 16px;
  background: var(--glass); border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px); box-shadow: var(--shadow);
  color: var(--text-3); font-size: 13.5px;
  transition: transform .3s, box-shadow .3s;
}
.hstat:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.hstat b {
  font-size: 22px; font-weight: 800; letter-spacing: -.5px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ============ 文章卡片（玻璃） ============ */
.main-area { position: relative; z-index: 1; padding: 20px 22px 70px; min-height: calc(100vh - 220px); }
.section-label {
  display: flex; align-items: center; gap: 14px;
  margin: 30px 0 20px; color: var(--text-3); font-size: 13px; font-weight: 700;
  letter-spacing: 2.5px; text-transform: uppercase;
}
.section-label::before { content: ''; width: 26px; height: 3px; border-radius: 3px; background: var(--grad); }

.post-list { display: flex; flex-direction: column; gap: 20px; }
.post-card {
  position: relative; display: flex;
  background: color-mix(in srgb, var(--bg-soft) 82%, transparent);
  backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: transform .35s cubic-bezier(.2,.8,.3,1), box-shadow .35s;
}
.post-card::before {
  content: ''; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: var(--grad); opacity: 0; transition: opacity .35s;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.post-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.post-card:hover::before { opacity: .8; }
.pc-cover {
  flex: 0 0 128px; display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden; text-decoration: none;
}
.pc-cover::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 25%, rgba(255,255,255,.35), transparent 55%);
}
.pc-char {
  font-size: 44px; font-weight: 900; color: rgba(255,255,255,.95);
  text-shadow: 0 4px 18px rgba(0,0,0,.25); transition: transform .4s;
}
.post-card:hover .pc-char { transform: scale(1.18) rotate(-6deg); }
.pc-body { flex: 1; padding: 20px 26px 18px; min-width: 0; }
.pc-meta { display: flex; align-items: center; gap: 8px; color: var(--text-3); font-size: 13px; flex-wrap: wrap; }
.dot { opacity: .6; }
.badge {
  display: inline-block; padding: 2px 11px; border-radius: 99px; font-size: 12px; font-weight: 500;
  background: var(--bg-hover); color: var(--text-2); border: 1px solid var(--border);
  transition: all .25s;
}
a.badge:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.badge-cat { color: #fff; border-color: transparent; background: var(--grad); font-weight: 600; }
.badge-pin { color: #d97706; background: rgba(217,119,6,.13); border-color: transparent; font-weight: 700; }
.badge-ok { color: #059669; background: rgba(5,150,105,.1); border-color: transparent; }
.badge-warn { color: #d97706; background: rgba(217,119,6,.12); border-color: transparent; }
.badge-light { background: rgba(255,255,255,.24); color: #fff; border-color: rgba(255,255,255,.35); backdrop-filter: blur(6px); }
.pc-title { margin: 9px 0 7px; font-size: 20px; line-height: 1.45; letter-spacing: -.3px; }
.pc-title a { color: var(--text); }
.pc-title a:hover { color: var(--accent); }
.pc-excerpt {
  color: var(--text-2); font-size: 14.5px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.pc-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 13px; }
.pc-tags { display: flex; gap: 11px; flex-wrap: wrap; font-size: 13px; }
.pc-tags a { color: var(--text-3); font-weight: 500; }
.pc-tags a:hover { color: var(--accent); }
.pc-views { color: var(--text-3); font-size: 13px; white-space: nowrap; }

/* ============ 分页 ============ */
.pager { display: flex; justify-content: center; align-items: center; gap: 9px; margin-top: 40px; flex-wrap: wrap; }
.pg-btn {
  min-width: 38px; height: 38px; padding: 0 14px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); border-radius: 12px; background: var(--bg-soft);
  color: var(--text-2); font-size: 14px; font-weight: 500; box-shadow: var(--shadow);
  transition: all .25s;
}
.pg-btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.pg-btn.on {
  background: var(--grad); background-size: 200% 200%; color: #fff;
  border-color: transparent; font-weight: 700; animation: gradShift 6s ease infinite;
}
.pg-gap { color: var(--text-3); }

/* ============ 文章详情 ============ */
.post-full { margin: 0 -22px; }
.pf-head { position: relative; padding: 72px 22px; text-align: center; color: #fff; overflow: hidden; }
.pf-head::before {
  content: ''; position: absolute; inset: 0;
  background: inherit; filter: blur(0);
}
.pf-head::after {
  content: ''; position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: .07; mix-blend-mode: overlay;
}
.pf-head-inner { position: relative; z-index: 1; max-width: 840px; margin: 0 auto; }
.pf-head .pc-meta { color: rgba(255,255,255,.88); justify-content: center; }
.pf-head h1 {
  font-size: clamp(26px, 5vw, 42px); margin-top: 16px; letter-spacing: -1px; line-height: 1.3;
  font-weight: 900; text-shadow: 0 4px 24px rgba(0,0,0,.25);
}
.pf-layout { display: flex; gap: 30px; max-width: 1120px; margin: 0 auto; padding: 38px 22px 60px; }
.pf-body {
  flex: 1; min-width: 0;
  background: color-mix(in srgb, var(--bg-soft) 88%, transparent);
  backdrop-filter: blur(18px) saturate(1.3); -webkit-backdrop-filter: blur(18px) saturate(1.3);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 40px clamp(22px, 4.5vw, 52px); box-shadow: var(--shadow);
}
.page-title { margin-bottom: 22px; font-size: 30px; font-weight: 900; letter-spacing: -.8px; }
.pf-tags { display: flex; gap: 11px; flex-wrap: wrap; margin-top: 34px; padding-top: 26px; border-top: 1px dashed var(--border); }
.tag-chip {
  padding: 5px 16px; border-radius: 99px; font-size: 13.5px; font-weight: 600;
  background: var(--accent-soft); color: var(--accent); transition: all .25s;
}
.tag-chip:hover { background: var(--accent); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 16px -6px var(--accent); }
.pf-nav { display: flex; gap: 16px; margin-top: 30px; }
.pf-nav > span { flex: 1; }
.pf-nav-item {
  flex: 1; padding: 16px 20px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); transition: all .3s; min-width: 0; position: relative; overflow: hidden;
}
.pf-nav-item::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--grad); opacity: 0; transition: opacity .3s;
}
.pf-nav-item:hover { border-color: transparent; box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.pf-nav-item:hover::before { opacity: 1; }
.pf-nav-item small { display: block; color: var(--text-3); font-size: 12px; font-weight: 600; }
.pf-nav-item b { color: var(--text); font-size: 14px; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pf-nav-item.next { text-align: right; }
.pf-nav-item.next::before { left: auto; right: 0; }

/* ============ 目录 ============ */
.pf-toc {
  flex: 0 0 230px; position: sticky; top: 96px; align-self: flex-start;
  max-height: calc(100vh - 130px); overflow-y: auto; font-size: 13.5px;
  padding: 18px 16px; background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius-sm); box-shadow: var(--shadow);
}
.pf-toc h4 {
  color: var(--text-3); font-size: 11.5px; text-transform: uppercase; letter-spacing: 2px;
  margin-bottom: 10px; display: flex; align-items: center; gap: 7px;
}
.pf-toc h4::before { content: ''; width: 14px; height: 3px; border-radius: 3px; background: var(--grad); }
.pf-toc nav { border-left: 2px solid var(--border); }
.pf-toc a {
  display: block; color: var(--text-2); padding: 4px 0 4px 14px;
  border-left: 2px solid transparent; margin-left: -2px; transition: all .25s;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; border-radius: 0 8px 8px 0;
}
.pf-toc a:hover, .pf-toc a.on { color: var(--accent); border-left-color: var(--accent); background: var(--accent-soft); }
.pf-toc .toc-3 { padding-left: 28px; }

/* ============ Markdown 正文 ============ */
.markdown { font-size: 16.5px; word-break: break-word; }
.markdown h1, .markdown h2, .markdown h3, .markdown h4 { letter-spacing: -.4px; margin: 1.8em 0 .75em; line-height: 1.4; font-weight: 800; scroll-margin-top: 90px; }
.markdown h1 { font-size: 27px; }
.markdown h2 { font-size: 22px; position: relative; padding-left: 16px; }
.markdown h2::before {
  content: ''; position: absolute; left: 0; top: .18em; bottom: .18em; width: 4px; border-radius: 4px;
  background: var(--grad);
}
.markdown h3 { font-size: 18.5px; } .markdown h4 { font-size: 16.5px; color: var(--text-2); }
.markdown p { margin: .9em 0; color: var(--text); }
.markdown blockquote {
  margin: 1.4em 0; padding: 16px 22px; border-left: none;
  background: var(--accent-soft); border-radius: 4px var(--radius-sm) var(--radius-sm) 4px;
  color: var(--text-2); position: relative;
}
.markdown blockquote::before {
  content: '“'; position: absolute; left: 10px; top: -4px; font-size: 44px; font-weight: 900;
  color: var(--accent); opacity: .25; font-family: Georgia, serif;
}
.markdown ul, .markdown ol { padding-left: 1.6em; margin: .9em 0; }
.markdown li { margin: .4em 0; }
.markdown li::marker { color: var(--accent); }
.markdown code {
  background: var(--accent-soft); padding: 2px 8px; border-radius: 7px;
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; font-size: .87em; color: var(--accent);
}
.markdown pre {
  background: var(--code-bg); border-radius: var(--radius-sm);
  padding: 18px 22px; overflow-x: auto; margin: 1.4em 0; line-height: 1.7;
  box-shadow: var(--shadow); position: relative;
}
.markdown pre::before {
  content: ''; position: sticky; display: block;
}
.markdown pre code { background: none; padding: 0; color: var(--code-color); font-size: 14px; }
.copy-btn {
  position: absolute; top: 10px; right: 12px; padding: 4px 13px; border-radius: 8px;
  border: 1px solid rgba(255,255,255,.14); background: rgba(255,255,255,.08);
  color: #aeb4c4; font-size: 12px; cursor: pointer; opacity: 0; transition: all .25s;
  font-family: inherit;
}
.markdown pre:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: #fff; border-color: rgba(255,255,255,.35); }
.markdown table { border-collapse: separate; border-spacing: 0; width: 100%; margin: 1.4em 0; font-size: 14.5px; display: block; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.markdown th, .markdown td { border-bottom: 1px solid var(--border); padding: 10px 16px; text-align: left; }
.markdown th { background: var(--bg-hover); font-weight: 700; border-bottom: 2px solid var(--border); }
.markdown tr:last-child td { border-bottom: none; }
.markdown tr:nth-child(2n) td { background: color-mix(in srgb, var(--bg-hover) 45%, transparent); }
.markdown hr { border: none; height: 1px; background: linear-gradient(90deg, transparent, var(--border), transparent); margin: 2.2em 0; }
.markdown a { border-bottom: 1px dashed var(--accent); }
.markdown a:hover { border-bottom-style: solid; }
.markdown img { box-shadow: var(--shadow); }

/* ============ 评论 ============ */
.comments { margin-top: 46px; border-top: 1px solid var(--border); padding-top: 32px; }
.sec-title { font-size: 20px; margin-bottom: 18px; letter-spacing: -.4px; font-weight: 800; }
.sec-title small { color: var(--text-3); font-weight: 500; font-size: 14px; }
.comment { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px dashed var(--border); }
.c-avatar {
  flex: 0 0 42px; height: 42px; border-radius: 50%; color: #fff; font-weight: 800;
  display: flex; align-items: center; justify-content: center; font-size: 17px;
  box-shadow: var(--shadow);
}
.c-main { flex: 1; min-width: 0; }
.c-head { display: flex; gap: 10px; align-items: baseline; font-size: 14.5px; }
.c-head time { color: var(--text-3); font-size: 12.5px; }
.c-main p { font-size: 14.5px; color: var(--text-2); margin-top: 3px; word-break: break-word; }
.c-form-wrap {
  margin-top: 28px; background: var(--bg);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
}
.c-form-wrap h4 { margin-bottom: 15px; font-weight: 800; }
.c-form-row { display: flex; gap: 13px; }
.c-form input, .c-form textarea, .post-form input, .post-form textarea, .post-form select,
.search-form input, .login-card input, .inline-add input {
  width: 100%; padding: 11px 16px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg-soft); color: var(--text); font-size: 14.5px; font-family: inherit;
  transition: border-color .25s, box-shadow .25s;
}
.c-form input:focus, .c-form textarea:focus, .post-form input:focus, .post-form textarea:focus, .post-form select:focus,
.search-form input:focus, .login-card input:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft);
}
.c-form .c-form-row { margin-bottom: 13px; }
.c-form textarea { margin-bottom: 13px; resize: vertical; }
.hp-field { position: absolute; left: -9999px; height: 0; opacity: 0; }
.flash-msg {
  padding: 12px 18px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: 14.5px; font-weight: 500;
  background: var(--accent-soft); color: var(--accent); border: 1px solid transparent;
  animation: slideDown .4s cubic-bezier(.2,.8,.3,1);
}
@keyframes slideDown { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }
.flash-msg.err { background: rgba(220,38,38,.08); color: #dc2626; }
.flash-msg.ok { background: rgba(5,150,105,.08); color: #059669; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 10px 22px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg-soft); color: var(--text); font-size: 14.5px; cursor: pointer;
  font-family: inherit; font-weight: 500; transition: all .25s; text-decoration: none;
}
.btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-primary {
  background: var(--grad); background-size: 200% 200%;
  color: #fff; border-color: transparent; font-weight: 700;
  box-shadow: 0 8px 20px -8px var(--accent);
  animation: gradShift 6s ease infinite;
}
.btn-primary:hover { color: #fff; opacity: .93; transform: translateY(-2px); box-shadow: 0 12px 26px -8px var(--accent); }
.btn-danger { color: #dc2626; } .btn-danger:hover { border-color: #dc2626; background: rgba(220,38,38,.06); color: #dc2626; }
.btn-block { width: 100%; }
.btn-sm { padding: 5px 13px; font-size: 13px; }

/* ============ 列表头 / 归档 / 搜索 ============ */
.list-head { padding: 20px 0 10px; }
.list-head h1 { font-size: 32px; font-weight: 900; letter-spacing: -1px; }
.list-head p { color: var(--text-3); margin-top: 6px; font-size: 14.5px; }
.archive { margin-top: 16px; }
.ar-year { display: flex; align-items: baseline; gap: 14px; margin: 34px 0 10px; }
.ar-year-num {
  font-size: 30px; font-weight: 900; letter-spacing: -1px;
  background: var(--grad); background-size: 200% 200%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: gradShift 8s ease infinite;
}
.ar-year-count { color: var(--text-3); font-size: 13.5px; }
.ar-list { list-style: none; }
.ar-list li a {
  display: flex; gap: 18px; align-items: baseline; padding: 10px 16px; border-radius: var(--radius-sm);
  color: var(--text); font-weight: 500; transition: all .25s; border: 1px solid transparent;
}
.ar-list li a:hover {
  background: var(--bg-soft); box-shadow: var(--shadow); transform: translateX(6px);
  border-color: var(--border);
}
.ar-list time { color: var(--text-3); font-size: 13.5px; font-family: ui-monospace, Menlo, monospace; flex: 0 0 44px; }
.ar-list span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search-form { display: flex; gap: 12px; margin: 16px 0 8px; }
.search-count { color: var(--text-2); margin: 12px 0 18px; font-size: 14.5px; }

/* ============ 空状态 ============ */
.empty-state { text-align: center; padding: 90px 20px; }
.empty-emoji { font-size: 56px; margin-bottom: 16px; animation: floaty 3.5s ease-in-out infinite; display: inline-block; }
@keyframes floaty { 0%,100% { transform: translateY(0);} 50% { transform: translateY(-10px);} }
.empty-state h2 { font-size: 22px; margin-bottom: 8px; font-weight: 800; }
.empty-state p { color: var(--text-2); }

/* ============ 页脚 ============ */
.site-foot {
  position: relative; z-index: 1; border-top: 1px solid var(--border); margin-top: 40px;
  padding: 34px 0 38px; overflow: hidden;
  background: color-mix(in srgb, var(--bg) 55%, transparent);
}
.site-foot::before {
  content: ''; position: absolute; top: -120px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 180px; border-radius: 50%;
  background: radial-gradient(ellipse, var(--accent-soft), transparent 70%);
  pointer-events: none;
}
.site-foot p { color: var(--text-3); font-size: 13.5px; text-align: center; position: relative; }
.foot-links { margin-top: 6px; }
.foot-links a { color: var(--text-3); }
.foot-links a:hover { color: var(--accent); }

/* ============ 登录页 ============ */
.login-body {
  display: flex; align-items: center; justify-content: center; min-height: 100vh;
  background: var(--bg); position: relative; overflow: hidden;
}
.login-body .blob { opacity: .35; }
.login-card {
  position: relative; z-index: 1;
  width: min(400px, 92vw); background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  border-radius: 26px; padding: 42px 36px; box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
}
.login-card h1 { font-size: 22px; text-align: center; font-weight: 900; }
.login-sub { text-align: center; color: var(--text-3); margin: 5px 0 24px; font-size: 14px; }
.login-card input { margin-bottom: 14px; }
.login-back { text-align: center; margin-top: 20px; font-size: 13.5px; }
.login-back a { color: var(--text-3); }

/* ============ 后台 ============ */
.admin-head .nav { height: 58px; }
.admin-main { padding: 30px 22px 60px; }
.sec-bar { display: flex; justify-content: space-between; align-items: center; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; }
.stat-card {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; text-align: center; box-shadow: var(--shadow); transition: transform .3s;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.stat-card b {
  display: block; font-size: 30px; font-weight: 900; letter-spacing: -1px;
  background: var(--grad); background-size: 200% 200%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: gradShift 8s ease infinite;
}
.stat-card span { color: var(--text-3); font-size: 13.5px; }
.admin-list { background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.admin-row {
  display: flex; align-items: center; gap: 10px; padding: 13px 20px;
  border-bottom: 1px solid var(--border); flex-wrap: wrap; transition: background .2s;
}
.admin-row:last-child { border-bottom: none; }
.admin-row:hover { background: var(--bg-hover); }
.ar-title { color: var(--text); font-weight: 500; flex: 1; min-width: 160px; }
.ar-title:hover { color: var(--accent); }
.admin-row time { color: var(--text-3); font-size: 13px; }
.inline-form { display: flex; gap: 8px; align-items: center; }
.inline-form input { width: auto; padding: 5px 11px; font-size: 13.5px; }
.post-form label { display: block; font-size: 14px; color: var(--text-2); margin-bottom: 16px; font-weight: 500; }
.post-form input, .post-form textarea, .post-form select { margin-top: 7px; font-size: 15px; }
.post-form textarea#mdEditor { font-family: "SF Mono", ui-monospace, Menlo, monospace; font-size: 14px; line-height: 1.75; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 15px; }
.check-line { display: flex !important; align-items: center; gap: 8px; }
.check-line input { width: auto !important; margin: 0 !important; }
.form-actions { display: flex; gap: 11px; }
.inline-add { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.inline-add input { width: auto; flex: 1; min-width: 140px; }
.comment-row { align-items: flex-start; }
.comment-detail { flex: 1; min-width: 240px; font-size: 14.5px; }
.comment-detail time { color: var(--text-3); font-size: 12.5px; }
.comment-detail p { color: var(--text-2); margin: 4px 0; }
.comment-detail small { color: var(--text-3); }
.row-actions { display: flex; gap: 8px; flex-direction: column; }
.pending-badge {
  background: #d97706; color: #fff; border-radius: 99px; font-size: 11px;
  padding: 0 6px; margin-left: 2px; vertical-align: middle;
}
#mdPreview { border: 1px dashed var(--border); border-radius: var(--radius-sm); padding: 22px; margin-top: 10px; background: var(--bg); }

/* ============ 滚动进场动画 ============ */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s cubic-bezier(.2,.8,.3,1), transform .7s cubic-bezier(.2,.8,.3,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .blob, .hero-eyebrow .pulse, .logo-dot { animation: none; }
}

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .pf-toc { display: none; }
  .pf-layout { padding: 26px 16px 46px; }
}
@media (max-width: 640px) {
  .post-card { flex-direction: column; }
  .pc-cover { flex: 0 0 88px; }
  .pc-body { padding: 16px 20px 15px; }
  .pf-nav { flex-direction: column; }
  .pf-nav-item.next { text-align: left; }
  .nav-links a { padding: 6px 9px; font-size: 14px; }
  .hero { padding: 60px 18px 44px; }
  .c-form-row { flex-direction: column; gap: 13px; }
  .pf-head { padding: 52px 16px; }
  .post-full { margin: 0 -14px; }
  .pf-body { padding: 28px 22px; }
}