:root {
  --paper: #f4f0e7;
  --paper-deep: #eae3d7;
  --card: #fbf8f1;
  --ink: #172a3a;
  --muted: #6d706d;
  --line: #d7d0c4;
  --teal: #3e716d;
  --blue: #2457e6;
  --shadow: 0 18px 50px rgba(34, 42, 45, 0.08);
  --footer-bg: #172a3a;
  --footer-text: #f4f0e7;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  --sans: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
}

:root[data-theme="dark"] {
  --paper: #151a1d;
  --paper-deep: #20272b;
  --card: #1c2327;
  --ink: #edf0eb;
  --muted: #a9b1ad;
  --line: #394246;
  --teal: #78aba5;
  --blue: #7195ff;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
  --footer-bg: #0f1417;
  --footer-text: #edf0eb;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  transition: background .25s ease, color .25s ease;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.12'/%3E%3C/svg%3E");
  z-index: 20;
  mix-blend-mode: multiply;
}
button, input { font: inherit; }
button { color: inherit; }
.section-shell { width: min(1320px, calc(100% - 96px)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 15;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(18px);
}
.nav-shell {
  width: min(1320px, calc(100% - 96px));
  min-height: 76px;
  margin: auto;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { border: 0; background: none; padding: 0; cursor: pointer; display: flex; align-items: baseline; gap: 13px; }
.brand, nav a, .featured-card, .article-row, .primary-button, .secondary-button, .text-button, .footer-inner a { text-decoration: none; }
.brand span { font: 600 25px/1 var(--serif); letter-spacing: .08em; }
.brand small { color: var(--muted); letter-spacing: .18em; font-size: 9px; }
nav { display: flex; align-items: center; gap: 34px; }
nav button { border: 0; background: none; padding: 27px 0 22px; cursor: pointer; position: relative; font-size: 14px; }
nav a { color: var(--ink); padding: 27px 0 22px; cursor: pointer; position: relative; font-size: 14px; }
nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 17px; height: 2px; background: var(--blue); transition: right .25s ease; }
nav a:hover::after, nav a:focus-visible::after { right: 0; }
nav button:not(.theme-toggle)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 17px; height: 2px; background: var(--blue); transition: right .25s ease; }
nav button:hover::after, nav button:focus-visible::after { right: 0; }
.theme-toggle { width: 34px; height: 34px; padding: 0; border: 1px solid var(--line); border-radius: 50%; }
.theme-toggle:hover { border-color: var(--blue); color: var(--blue); }
.menu-button { display: none; }
.nav-category-menu { position:relative; }
.nav-category-menu summary { position:relative; padding:27px 0 22px; cursor:pointer; font-size:14px; list-style:none; }
.nav-category-menu summary::-webkit-details-marker { display:none; }
.nav-category-menu summary::after { content:"⌄"; display:inline-block; margin-left:7px; color:var(--blue); transition:transform .18s; }
.nav-category-menu[open] summary::after { transform:rotate(180deg); }
.nav-category-panel { position:absolute; top:calc(100% - 10px); left:50%; z-index:20; display:grid; min-width:240px; padding:8px; border:1px solid var(--line); background:var(--card); box-shadow:var(--shadow); transform:translateX(-50%); }
nav .nav-category-panel a { display:flex; align-items:center; justify-content:space-between; gap:24px; padding:11px 12px; color:var(--ink); font-size:12px; white-space:nowrap; }
nav .nav-category-panel a::after { display:none; }
nav .nav-category-panel a:hover { background:var(--paper-deep); color:var(--blue); }
.nav-category-panel small { color:var(--muted); font-size:10px; }

.hero { min-height: 690px; display: grid; grid-template-columns: 52% 48%; align-items: center; padding-block: 72px 82px; }
.hero-copy { padding-right: 70px; }
.eyebrow { margin: 0 0 24px; color: var(--blue); font-size: 11px; font-weight: 700; letter-spacing: .24em; }
h1, h2, p { margin-top: 0; }
h1 { font: 600 clamp(42px, 4.3vw, 68px)/1.34 var(--serif); letter-spacing: .025em; margin-bottom: 28px; }
.hero-intro { max-width: 610px; color: var(--muted); font: 400 17px/1.9 var(--sans); }
.hero-actions { display: flex; align-items: center; gap: 34px; margin-top: 36px; }
.primary-button { border: 1px solid var(--ink); background: var(--ink); color: var(--paper); padding: 15px 22px; cursor: pointer; transition: transform .2s ease, background .2s ease; }
.primary-button span { margin-left: 24px; }
.primary-button:hover { transform: translateY(-2px); background: var(--blue); border-color: var(--blue); color: white; }
.text-button { border: 0; border-bottom: 1px solid currentColor; padding: 8px 0; background: none; cursor: pointer; }
.text-button span { display: inline-block; margin-left: 12px; transition: transform .2s; }
.text-button:hover { color: var(--blue); }
.text-button:hover span { transform: translateX(4px); }
.mini-stats { display: flex; gap: 28px; margin-top: 56px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.mini-stats strong { font: 600 18px var(--serif); color: var(--ink); margin-right: 5px; }
.hero-visual { position: relative; height: 535px; }
.hero-visual img { width: 92%; height: 88%; object-fit: cover; position: absolute; right: 0; top: 4%; box-shadow: var(--shadow); filter: saturate(.83) contrast(.96); }
.blue-grid { position: absolute; width: 112px; height: 112px; left: 0; top: 0; z-index: 2; background-image: radial-gradient(var(--blue) 1.3px, transparent 1.3px); background-size: 14px 14px; opacity: .55; }
.note-chip { position: absolute; z-index: 3; left: -20px; bottom: 18px; padding: 21px 25px; background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow); display: grid; gap: 6px; font: 600 10px/1 var(--sans); letter-spacing: .23em; }
.note-chip span:nth-child(2) { color: var(--blue); }
.visual-index { position: absolute; right: 0; bottom: 0; color: var(--muted); font: 10px var(--sans); letter-spacing: .16em; }

.recent { padding-bottom: 110px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; border-bottom: 1px solid var(--line); padding-bottom: 22px; margin-bottom: 28px; }
.section-heading .eyebrow { margin-bottom: 10px; }
.section-heading h2, .articles-intro h1, .articles-intro h2, .about h2 { font: 600 clamp(30px, 3vw, 45px)/1.35 var(--serif); margin-bottom: 0; }
.featured-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.featured-card { min-height: 305px; text-align: left; position: relative; padding: 28px; border: 1px solid var(--line); background: color-mix(in srgb, var(--card) 82%, transparent); cursor: pointer; transition: transform .25s, border .25s, box-shadow .25s; display: flex; flex-direction: column; align-items: flex-start; }
.featured-card { color: var(--ink); }
.featured-card:hover { transform: translateY(-5px); border-color: var(--blue); box-shadow: var(--shadow); }
.card-number { position: absolute; right: 25px; top: 22px; color: var(--line); font: 600 43px var(--serif); }
.post-meta, .article-main small { color: var(--teal); font-size: 11px; font-weight: 700; letter-spacing: .1em; }
.featured-card strong { font: 600 24px/1.45 var(--serif); margin: 31px 0 14px; }
.post-excerpt { color: var(--muted); font-size: 13px; line-height: 1.8; max-width: 90%; }
.card-footer { width: 100%; margin-top: auto; padding-top: 18px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; }

.articles { background: var(--paper-deep); padding: 110px 0 120px; }
.listing-page { min-height: calc(100vh - 226px); background: var(--paper-deep); }
.listing-page .articles { padding-top: 92px; }
.articles-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: end; }
.articles-intro .eyebrow { margin-bottom: 10px; }
.articles-intro > p { color: var(--muted); line-height: 1.8; max-width: 480px; margin: 0 0 4px auto; }
.article-tools { margin-top: 50px; padding: 15px 0; border-block: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.filters button { border: 0; background: transparent; padding: 10px 15px; cursor: pointer; color: var(--muted); }
.filters a { padding: 10px 15px; color: var(--muted); text-decoration: none; }
.filters a.active { color: white; background: var(--blue); }
.filters a small { opacity: .7; }
.filters button.active { color: white; background: var(--blue); }
.search-box { min-width: 260px; display: flex; align-items: center; border-bottom: 1px solid var(--line); gap: 10px; }
.search-box span { color: var(--blue); font-size: 22px; }
.search-box input { width: 100%; border: 0; outline: 0; color: var(--ink); background: transparent; padding: 10px 4px; }
.search-box button { border: 0; background: none; color: var(--blue); cursor: pointer; }
.title-search { min-width: 420px; display: flex; align-items: center; gap: 10px; }
.title-search label { min-width: 0; flex: 1; display: flex; align-items: center; gap: 9px; border-bottom: 1px solid var(--line); }
.title-search label span { color: var(--blue); font-size: 20px; }
.title-search input { width: 100%; min-width: 130px; border: 0; outline: 0; padding: 10px 2px; color: var(--ink); background: transparent; }
.title-search select, .admin-title-search select { border: 1px solid var(--line); padding: 9px 30px 9px 10px; color: var(--ink); background: var(--card); }
.title-search button { border: 0; background: none; color: var(--blue); cursor: pointer; }
.search-result-note { margin: 18px 0 0; color: var(--muted); font-size: 12px; }
.article-list { border-top: 1px solid var(--line); margin-top: 30px; }
.article-row { width: 100%; min-height: 148px; display: grid; grid-template-columns: 120px 1fr 240px 28px; gap: 24px; align-items: center; text-align: left; border: 0; border-bottom: 1px solid var(--line); background: transparent; cursor: pointer; padding: 24px 6px; transition: background .2s; }
.article-row { color: var(--ink); }
.article-row:hover { background: color-mix(in srgb, var(--card) 55%, transparent); }
.article-row > span:last-child { font-size: 20px; transition: transform .2s; }
.article-row:hover > span:last-child { color: var(--blue); transform: translate(3px,-3px); }
.article-date { color: var(--muted); font: 11px monospace; }
.article-main { display: grid; gap: 7px; }
.article-main strong { font: 600 21px var(--serif); }
.article-main > span { color: var(--muted); font-size: 12px; }
.article-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.article-tags em, .post-tagline span { color: var(--muted); background: var(--card); border: 1px solid var(--line); padding: 6px 9px; font-size: 10px; font-style: normal; }
.empty-state { color: var(--muted); padding: 70px 0; text-align: center; }

.about { padding-block: 130px; display: grid; grid-template-columns: 33% 1fr; gap: 9%; align-items: center; }
.about-mark { aspect-ratio: 1; border: 1px solid var(--line); display: grid; place-content: center; text-align: center; position: relative; background: var(--card); }
.about-mark::before, .about-mark::after { content: ""; position: absolute; background: var(--blue); }
.about-mark::before { width: 64px; height: 3px; left: -32px; top: 50%; }
.about-mark::after { width: 3px; height: 64px; top: -32px; left: 50%; }
.about-mark span { font: 600 110px var(--serif); }
.about-mark small { color: var(--blue); letter-spacing: .5em; }
.about-copy .eyebrow { margin-bottom: 15px; }
.about-copy h2 { margin-bottom: 36px; }
.about-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 35px; color: var(--muted); font-size: 14px; line-height: 2; }
.mail-link { display: inline-block; margin-top: 20px; color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--ink); padding-bottom: 5px; }
.mail-link:hover { color: var(--blue); border-color: var(--blue); }

/* Resume-style about page */
.resume-page { padding-bottom: 120px; }
.resume-hero { min-height: 560px; display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 9%; align-items: center; padding-block: 90px; border-bottom: 1px solid var(--line); }
.resume-intro { max-width: 760px; }
.resume-role { margin-bottom: 12px; color: var(--teal); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.resume-intro h1 { margin-bottom: 24px; }
.resume-summary { max-width: 690px; margin-bottom: 28px; color: var(--muted); font: 16px/2 var(--serif); }
.resume-signature { aspect-ratio: 1; position: relative; display: grid; place-content: center; overflow: hidden; border: 1px solid var(--line); background: linear-gradient(145deg, var(--card), var(--paper-deep)); text-align: center; box-shadow: var(--shadow); }
.resume-signature::before { content: ""; position: absolute; inset: 22px; border: 1px solid color-mix(in srgb, var(--blue) 30%, var(--line)); }
.resume-signature::after { content: ""; position: absolute; width: 130px; height: 130px; right: -42px; top: -42px; border-radius: 50%; background: color-mix(in srgb, var(--blue) 12%, transparent); }
.resume-signature span { font: 600 112px/1 var(--serif); }
.resume-signature small { margin-top: 16px; color: var(--blue); font-size: 10px; font-weight: 700; letter-spacing: .48em; }
.resume-layout { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 86px; padding-top: 90px; }
.resume-main { display: grid; gap: 76px; }
.resume-section-title { display: flex; align-items: baseline; gap: 18px; padding-bottom: 18px; margin-bottom: 30px; border-bottom: 1px solid var(--line); }
.resume-section-title span { color: var(--blue); font: 700 10px var(--sans); letter-spacing: .18em; }
.resume-section-title h2, .resume-side-card h2 { margin: 0; font: 600 30px/1.4 var(--serif); }
.resume-entry { position: relative; padding: 0 0 28px 28px; border-left: 1px solid var(--line); }
.resume-entry::before { content: ""; position: absolute; width: 9px; height: 9px; left: -5px; top: 8px; border-radius: 50%; background: var(--paper); border: 2px solid var(--blue); }
.resume-entry:last-child { padding-bottom: 0; }
.resume-entry h3 { margin: 0 0 10px; font: 600 21px/1.5 var(--serif); }
.resume-entry p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }
.resume-entry-time { margin-bottom: 8px !important; color: var(--blue) !important; font: 700 10px var(--sans) !important; letter-spacing: .13em; }
.resume-timeline { display: grid; gap: 22px; }
.resume-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 24px; }
.resume-metrics strong { padding: 15px 14px; border: 1px solid var(--line); background: var(--card); font-size: 12px; font-weight: 600; }
.resume-sidebar { display: grid; align-content: start; gap: 18px; }
.resume-side-card { padding: 28px; border: 1px solid var(--line); background: color-mix(in srgb, var(--card) 82%, transparent); }
.resume-side-label { margin-bottom: 8px; color: var(--blue); font-size: 9px; font-weight: 700; letter-spacing: .2em; }
.resume-side-card h2 { margin-bottom: 21px; font-size: 23px; }
.resume-side-card ul { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.resume-side-card li { position: relative; padding-left: 15px; color: var(--muted); font-size: 12px; line-height: 1.75; }
.resume-side-card li::before { content: ""; position: absolute; left: 0; top: .72em; width: 5px; height: 5px; background: var(--teal); }
.resume-course-list li { padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.resume-course-list li:last-child { padding-bottom: 0; border-bottom: 0; }
.resume-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.resume-tags span { padding: 7px 10px; border: 1px solid var(--line); color: var(--muted); background: var(--paper); font-size: 10px; }
.resume-links { display: flex; flex-wrap: wrap; gap: 10px; margin: 25px 0; }
.resume-links a { padding: 8px 12px; border: 1px solid var(--line); color: var(--ink); background: color-mix(in srgb, var(--card) 78%, transparent); font-size: 11px; text-decoration: none; }
.resume-links a:hover { color: white; border-color: var(--blue); background: var(--blue); }
.resume-focus { display: flex; flex-wrap: wrap; gap: 8px; }
.resume-focus span { padding: 6px 9px; color: var(--teal); border-bottom: 1px solid var(--teal); font-size: 10px; }
.resume-content { width: min(980px, calc(100% - 96px)); display: grid; gap: 82px; padding-top: 90px; }
.resume-chronology .resume-entry-time { margin-bottom: 7px !important; }
.resume-paper { margin-top: 16px; padding: 17px 19px; border-left: 2px solid var(--blue); background: color-mix(in srgb, var(--card) 70%, transparent); }
.resume-paper h4 { margin: 0 0 10px; font: 600 16px/1.65 var(--serif); }
.resume-paper h4 a { color: var(--ink); text-decoration: none; }
.resume-paper h4 a:hover { color: var(--blue); }
.resume-paper-authors { margin: 0 !important; color: var(--muted); font-size: 12px !important; line-height: 1.8 !important; }
.resume-paper-authors strong { color: var(--blue); font-weight: 700; }
.resume-paper-authors a, .resume-paper-link { color: var(--blue); }
.resume-paper-link { display: inline-block; margin-top: 8px; font-size: 11px; text-decoration: none; }
.settings-hint { color: var(--muted); font-size: 11px; font-weight: 400; line-height: 1.8; }

footer { background: var(--footer-bg); color: var(--footer-text); }
.footer-inner { min-height: 150px; display: grid; grid-template-columns: 1fr 1fr auto; align-items: center; gap: 30px; }
.footer-inner p { margin: 0; font-size: 11px; opacity: .75; }
.footer-inner p:first-child { display: flex; align-items: baseline; gap: 16px; }
.footer-inner strong { font: 600 20px var(--serif); opacity: 1; }
.footer-inner button { border: 0; background: transparent; color: inherit; cursor: pointer; }
.footer-inner a { color: inherit; }

/* Article page */
.article-page { min-height: 70vh; }
.article-layout { width: min(1180px, calc(100% - 40px)); margin:0 auto; display:grid; grid-template-columns:minmax(0,820px) minmax(210px,250px); gap:70px; align-items:start; }
.article-shell { min-width:0; padding:90px 0 130px; }
.back-link { display: inline-block; color: var(--muted); text-decoration: none; margin-bottom: 50px; }
.article-shell header { padding-bottom: 40px; border-bottom: 1px solid var(--line); }
.article-shell h1 { margin-bottom: 24px; }
.markdown-body { font: 17px/2 var(--serif); padding-top: 42px; }
.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4,.markdown-body h5,.markdown-body h6 { scroll-margin-top:110px; }
.markdown-body h1 { font:600 36px/1.45 var(--serif); margin:62px 0 20px; }
.markdown-body h2 { font: 600 30px/1.5 var(--serif); margin: 55px 0 18px; }
.markdown-body h3 { font: 600 22px/1.5 var(--serif); margin: 38px 0 14px; }
.markdown-body h4 { font:600 18px/1.55 var(--serif); margin:32px 0 12px; }
.markdown-body h5,.markdown-body h6 { font:700 15px/1.6 var(--sans); margin:28px 0 10px; }
.article-toc { position:sticky; top:106px; max-height:calc(100vh - 132px); margin-top:90px; overflow:auto; border-left:1px solid var(--line); }
.toc-title { margin:0 0 15px; padding-left:18px; color:var(--blue); font-size:9px; font-weight:700; letter-spacing:.2em; }
.toc-toggle { display:none; }
.toc-list { display:grid; gap:2px; margin:0; padding:0 8px 0 0; list-style:none; }
.toc-list li { min-width:0; }
.toc-list a { display:block; padding:7px 10px 7px 18px; border-left:2px solid transparent; color:var(--muted); font-size:11px; line-height:1.55; text-decoration:none; transition:color .18s,border-color .18s,background .18s; }
.toc-list a span { display:-webkit-box; overflow:hidden; -webkit-box-orient:vertical; -webkit-line-clamp:2; }
.toc-list a:hover,.toc-list a:focus-visible { color:var(--ink); background:color-mix(in srgb,var(--card) 65%,transparent); }
.toc-list a.is-active { color:var(--blue); border-left-color:var(--blue); background:color-mix(in srgb,var(--blue) 6%,transparent); }
.toc-depth-1 a { padding-left:30px; }
.toc-depth-2 a { padding-left:42px; }
.toc-depth-3 a,.toc-depth-4 a { padding-left:54px; font-size:10px; }
.markdown-body img { max-width: 100%; height: auto; margin: 30px 0; }
.markdown-body blockquote { margin: 30px 0; padding: 20px 28px; border-left: 3px solid var(--blue); background: var(--card); color: var(--muted); }
.markdown-body pre { overflow-x: auto; padding: 20px; background: #101820; color: #eef3f4; font: 14px/1.7 monospace; }
.markdown-body code:not(pre code) { padding: 2px 6px; background: var(--paper-deep); font-size: .88em; }
.markdown-body table { width: 100%; border-collapse: collapse; font-family: var(--sans); font-size: 14px; }
.markdown-body th, .markdown-body td { padding: 10px; border: 1px solid var(--line); text-align: left; }
.error-page { min-height: 70vh; padding-block: 120px; }
.error-page p { color: var(--muted); margin-bottom: 40px; }

/* Admin */
.admin-link { color: var(--blue); }
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 30px; background: var(--paper-deep); }
.login-card { width: min(460px, 100%); padding: 48px; background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow); }
.login-card .brand { margin-bottom: 50px; }
.login-card h1 { font-size: 36px; margin-bottom: 12px; }
.login-card > p:not(.eyebrow) { color: var(--muted); }
.admin-form { display: grid; gap: 18px; }
.admin-form label, .editor-form label { display: grid; gap: 8px; color: var(--muted); font-size: 12px; font-weight: 600; }
.admin-form input, .admin-form textarea, .editor-form input, .editor-form textarea, .editor-form select {
  width: 100%; border: 1px solid var(--line); background: var(--paper); color: var(--ink); padding: 12px 14px; outline: 0; border-radius: 0;
}
.admin-form input:focus, .admin-form textarea:focus, .editor-form input:focus, .editor-form textarea:focus, .editor-form select:focus { border-color: var(--blue); box-shadow: 0 0 0 2px color-mix(in srgb, var(--blue) 15%, transparent); }
.secondary-button { display: inline-block; border: 1px solid var(--ink); background: transparent; color: var(--ink); padding: 13px 20px; cursor: pointer; text-align: center; }
.secondary-button:hover { color: var(--blue); border-color: var(--blue); }
.alert { padding: 13px 16px; margin: 18px 0; border-left: 3px solid; font-size: 13px; }
.alert.error { color: #a13434; background: #fff0ed; border-color: #d34e41; }
.alert.success { color: #285c50; background: #e9f5ee; border-color: var(--teal); }
.admin-shell { min-height: calc(100vh - 76px); display: grid; grid-template-columns: 230px 1fr; width: min(1460px, calc(100% - 60px)); margin: auto; }
.admin-sidebar { padding: 48px 25px 50px 0; border-right: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; }
.admin-sidebar strong { margin: 0 14px 24px; font: 600 19px var(--serif); }
.admin-sidebar a, .admin-sidebar button { border: 0; background: none; color: var(--muted); padding: 11px 14px; text-align: left; text-decoration: none; cursor: pointer; font-size: 13px; }
.admin-sidebar a.active, .admin-sidebar a:hover { color: white; background: var(--blue); }
.admin-sidebar form { margin-top: auto; }
.admin-content { padding: 55px 0 100px 55px; min-width: 0; }
.admin-heading { display: flex; justify-content: space-between; align-items: start; gap: 30px; margin-bottom: 35px; }
.admin-heading .eyebrow { margin-bottom: 10px; }
.admin-heading h1 { font-size: 42px; margin-bottom: 8px; }
.admin-heading p { color: var(--muted); }
.admin-title-search { display: grid; grid-template-columns: minmax(260px,1fr) auto auto auto; align-items: end; gap: 12px; margin-bottom: 26px; padding: 18px; border: 1px solid var(--line); background: var(--card); }
.admin-title-search label { display: grid; gap: 7px; color: var(--muted); font-size: 11px; font-weight: 600; }
.admin-title-search input { width: 100%; border: 0; border-bottom: 1px solid var(--line); outline: 0; padding: 9px 2px; color: var(--ink); background: transparent; }
.admin-title-search input:focus { border-color: var(--blue); }
.admin-title-search a { align-self: center; color: var(--muted); font-size: 12px; }
.upload-panel { border: 1px solid var(--line); background: var(--card); padding: 24px; display: flex; justify-content: space-between; align-items: center; gap: 30px; margin-bottom: 28px; }
.upload-panel h2, .settings-card h2 { font: 600 22px var(--serif); margin: 0 0 7px; }
.upload-panel p { color: var(--muted); margin: 0; font-size: 12px; }
.upload-panel form { display: flex; align-items: center; gap: 12px; }
.admin-table { border-top: 1px solid var(--line); }
.admin-row { display: grid; grid-template-columns: minmax(240px,2fr) 1fr 100px 120px minmax(210px,1fr); gap: 18px; align-items: center; padding: 18px 10px; border-bottom: 1px solid var(--line); font-size: 12px; }
.admin-row > span:first-child { display: grid; gap: 4px; }
.admin-row small { color: var(--muted); }
.table-head { color: var(--muted); font-weight: 700; }
.status { display: inline-block; padding: 5px 8px; font-style: normal; }
.status.live { color: #236451; background: #dceee7; }
.status.draft { color: #785c23; background: #f1e8d3; }
.row-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.row-actions a, .row-actions button { color: var(--blue); background: none; border: 0; padding: 0; text-decoration: none; cursor: pointer; font-size: 12px; }
.row-actions form { display: inline; }
.row-actions form button { color: #b43e3e; }
.editor-form { border-top: 1px solid var(--line); padding-top: 30px; }
.editor-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.editor-grid .wide { grid-column: 1 / -1; }
.markdown-editor { min-height: 520px; resize: vertical; font: 14px/1.75 monospace; tab-size: 2; }
.editor-markdown-field { display:grid; gap:8px; }
.editor-field-heading { display:flex; align-items:center; justify-content:space-between; gap:20px; color:var(--muted); font-size:12px; font-weight:600; }
.editor-field-heading > label { display:block; }
.editor-field-heading > span { font-weight:400; }
.editor-field-heading > span.is-error { color:#b43e3e; }
.markdown-workspace { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:18px; align-items:stretch; }
.markdown-workspace .markdown-editor { min-height:640px; height:70vh; max-height:900px; }
.markdown-workspace .markdown-editor.is-source-located { border-color:var(--blue); box-shadow:0 0 0 3px color-mix(in srgb,var(--blue) 18%,transparent); }
.markdown-preview-pane { min-width:0; height:70vh; min-height:640px; max-height:900px; overflow:auto; border:1px solid var(--line); background:var(--card); }
.markdown-preview-heading { position:sticky; top:0; z-index:2; display:flex; align-items:center; justify-content:space-between; gap:16px; padding:11px 18px; border-bottom:1px solid var(--line); background:color-mix(in srgb,var(--card) 94%,transparent); color:var(--blue); font-size:10px; font-weight:700; letter-spacing:.16em; backdrop-filter:blur(12px); }
.markdown-preview-heading small { color:var(--muted); font-size:9px; font-weight:400; letter-spacing:.08em; }
.markdown-preview-body { padding:8px 30px 48px; overflow-wrap:anywhere; }
.markdown-preview-body [data-source-line] { cursor:text; transition:outline-color .15s,background .15s; }
.markdown-preview-body [data-source-line]:hover { outline:1px dashed color-mix(in srgb,var(--blue) 45%,transparent); outline-offset:5px; background:color-mix(in srgb,var(--blue) 4%,transparent); }
.markdown-preview-body:empty::before { content:"预览会显示在这里。"; display:block; padding-top:32px; color:var(--muted); font:13px/1.7 var(--sans); }
.editor-actions { display: flex; gap: 15px; margin-top: 25px; }
.settings-card { max-width: 760px; padding: 30px; border: 1px solid var(--line); background: var(--card); margin-bottom: 25px; }
.settings-card h2 { padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.settings-hero { width: min(420px,100%); aspect-ratio: 3/2; object-fit: cover; border: 1px solid var(--line); }
.settings-text-form { max-width:1000px; }
.settings-text-form h2:not(:first-of-type) { margin-top:30px; }
.settings-fields { display:grid; grid-template-columns:1fr 1fr; gap:16px 20px; }
.settings-fields .settings-wide { grid-column:1/-1; }
.list-pagination { display: grid; grid-template-columns: 110px 1fr 110px; align-items: center; gap: 18px; margin-top: 38px; padding-top: 24px; border-top: 1px solid var(--line); }
.list-pagination > div { display: flex; justify-content: center; gap: 6px; flex-wrap: wrap; }
.list-pagination a, .list-pagination .disabled, .list-pagination .ellipsis { padding: 8px 10px; color: var(--muted); font-size: 12px; text-align: center; text-decoration: none; }
.list-pagination > a:last-child, .list-pagination > .disabled:last-child { text-align: right; }
.list-pagination a:hover, .list-pagination a.active { color: white; background: var(--blue); }
.list-pagination .disabled { opacity: .4; }

@media (max-width: 1000px) {
  .admin-shell { width: calc(100% - 30px); grid-template-columns: 170px 1fr; }
  .admin-content { padding-left: 30px; }
  .admin-row { grid-template-columns: 2fr 1fr 90px 1fr; }
  .admin-row > span:nth-child(4), .table-head > span:nth-child(4) { display: none; }
  .markdown-workspace { grid-template-columns:1fr; }
  .markdown-workspace .markdown-editor,.markdown-preview-pane { height:auto; min-height:520px; max-height:none; }
}
@media (max-width: 720px) {
  nav a { padding: 14px; }
  .admin-shell { display: block; width: calc(100% - 28px); }
  .admin-sidebar { border-right: 0; border-bottom: 1px solid var(--line); padding: 18px 0; flex-direction: row; overflow-x: auto; }
  .admin-sidebar strong, .admin-sidebar form { display: none; }
  .admin-sidebar a { white-space: nowrap; }
  .admin-content { padding: 35px 0 70px; }
  .admin-heading { align-items: flex-start; flex-direction: column; }
  .upload-panel, .upload-panel form { align-items: stretch; flex-direction: column; }
  .admin-row { grid-template-columns: 1fr auto; }
  .admin-row > span:nth-child(2), .admin-row > span:nth-child(3), .table-head { display: none; }
  .editor-grid { grid-template-columns: 1fr; }
  .editor-grid .wide { grid-column: auto; }
  .login-card { padding: 32px 24px; }
  .settings-fields { grid-template-columns:1fr; }
  .settings-fields .settings-wide { grid-column:auto; }
  .admin-title-search { grid-template-columns:1fr 1fr; }
  .admin-title-search label { grid-column:1/-1; }
}

.modal-backdrop { position: fixed; inset: 0; z-index: 30; background: rgba(9, 16, 20, .68); backdrop-filter: blur(7px); display: grid; place-items: center; padding: 30px; }
.modal-backdrop[hidden] { display: none; }
.post-modal { position: relative; max-height: 90vh; overflow-y: auto; width: min(760px, 100%); padding: clamp(32px, 6vw, 72px); background: var(--paper); box-shadow: 0 30px 100px rgba(0,0,0,.3); }
.modal-close { position: absolute; right: 24px; top: 18px; border: 0; background: none; font-size: 32px; cursor: pointer; }
.post-modal h2 { font: 600 clamp(34px, 5vw, 52px)/1.35 var(--serif); margin-bottom: 22px; }
.post-lead { font: 18px/1.9 var(--serif); color: var(--teal); padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.post-body { margin: 32px 0; }
.post-body p { font: 16px/2.05 var(--serif); }
.post-body p:first-child::first-letter { float: left; font-size: 50px; line-height: .9; margin: 10px 9px 0 0; color: var(--blue); }
.post-tagline { display: flex; gap: 8px; margin-bottom: 30px; }

@media (max-width: 900px) {
  .section-shell, .nav-shell { width: min(100% - 42px, 700px); }
  .menu-button { display: grid; gap: 6px; width: 35px; border: 0; background: none; padding: 8px 0; }
  .menu-button span { display: block; height: 1px; background: var(--ink); }
  nav { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 20px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: var(--shadow); flex-direction: column; gap: 0; align-items: stretch; }
  nav.open { display: flex; }
  nav button { padding: 14px; text-align: left; }
  .nav-category-menu summary { padding:14px; }
  .nav-category-panel { position:static; min-width:0; margin:0 14px 8px; padding:4px; box-shadow:none; transform:none; }
  nav .nav-category-panel a { padding:10px 12px; }
  .theme-toggle { width: auto; border-radius: 0; }
  .hero { grid-template-columns: 1fr; padding-top: 60px; }
  .hero-copy { padding-right: 0; }
  .hero-visual { height: 430px; margin-top: 50px; }
  .featured-grid { grid-template-columns: 1fr; }
  .featured-card { min-height: 265px; }
  .article-row { grid-template-columns: 90px 1fr 25px; }
  .article-tags { display: none; }
  .about { grid-template-columns: 260px 1fr; gap: 40px; }
  .about-mark span { font-size: 80px; }
  .resume-hero { grid-template-columns: 1fr 230px; gap: 45px; min-height: 0; }
  .resume-layout { grid-template-columns: 1fr; gap: 70px; }
  .resume-sidebar { grid-template-columns: 1fr 1fr; }
  .resume-content { width: min(100% - 42px, 700px); }
}

@media (max-width:1100px) {
  .article-layout { width:min(820px,calc(100% - 40px)); grid-template-columns:minmax(0,1fr); gap:0; }
  .article-shell { grid-row:2; padding-top:34px; }
  .article-toc { grid-row:1; position:sticky; top:76px; z-index:12; max-height:none; margin-top:18px; overflow:visible; border:1px solid var(--line); background:color-mix(in srgb,var(--paper) 94%,transparent); backdrop-filter:blur(14px); }
  .toc-toggle { width:100%; display:flex; align-items:center; justify-content:space-between; border:0; background:transparent; padding:13px 16px; cursor:pointer; font-size:12px; }
  .article-toc[data-open="true"] .toc-toggle span:last-child { transform:rotate(45deg); }
  .toc-toggle span:last-child { color:var(--blue); font-size:20px; transition:transform .18s; }
  .toc-panel { display:none; max-height:55vh; overflow:auto; padding:5px 10px 16px; border-top:1px solid var(--line); }
  .article-toc[data-open="true"] .toc-panel { display:block; }
  .toc-title { display:none; }
}

@media (max-width: 620px) {
  .section-shell, .nav-shell { width: calc(100% - 32px); }
  .brand small { display: none; }
  .hero { padding-block: 48px 65px; min-height: 0; }
  h1 { font-size: 38px; }
  .hero-intro { font-size: 15px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 14px; }
  .mini-stats { gap: 12px; justify-content: space-between; }
  .mini-stats span { display: grid; }
  .hero-visual { height: 315px; }
  .hero-visual img { width: 95%; height: 90%; }
  .blue-grid { width: 70px; height: 70px; }
  .note-chip { left: 0; padding: 14px; }
  .recent { padding-bottom: 75px; }
  .section-heading { align-items: center; }
  .section-heading .text-button { font-size: 12px; }
  .articles { padding-block: 75px; }
  .articles-intro { grid-template-columns: 1fr; }
  .articles-intro > p { margin-left: 0; }
  .article-tools { align-items: stretch; flex-direction: column; }
  .search-box { min-width: 0; }
  .title-search { min-width: 0; flex-wrap: wrap; }
  .title-search label { flex-basis: 100%; }
  .article-row { grid-template-columns: 1fr 24px; gap: 12px; }
  .article-date { grid-column: 1 / -1; }
  .article-main > span { display: none; }
  .about { padding-block: 85px; grid-template-columns: 1fr; }
  .about-mark { width: 210px; }
  .about-columns { grid-template-columns: 1fr; gap: 5px; }
  .listing-page .articles { padding-top: 64px; }
  .resume-page { padding-bottom: 75px; }
  .resume-hero { grid-template-columns: 1fr; padding-block: 62px; }
  .resume-signature { width: min(240px, 76vw); }
  .resume-layout { padding-top: 62px; gap: 55px; }
  .resume-main { gap: 56px; }
  .resume-metrics, .resume-sidebar { grid-template-columns: 1fr; }
  .resume-section-title h2 { font-size: 26px; }
  .resume-content { width: calc(100% - 32px); padding-top: 62px; gap: 58px; }
  .list-pagination { grid-template-columns: 1fr 1fr; }
  .list-pagination > div { grid-column: 1/-1; grid-row: 1; }
  .footer-inner { padding-block: 38px; min-height: 0; grid-template-columns: 1fr; gap: 18px; }
  .modal-backdrop { padding: 12px; }
  .post-modal { padding: 54px 25px 35px; }
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy > *, .hero-visual { animation: rise .65s both; }
  .hero-copy > *:nth-child(2) { animation-delay: .08s; }
  .hero-copy > *:nth-child(3) { animation-delay: .16s; }
  .hero-visual { animation-delay: .15s; }
  @keyframes rise { from { opacity: 0; transform: translateY(16px); } }
}