/* blog-server theme — consolidated from 基础构想 prototypes.
   Light by default; dark reveals automatically via prefers-color-scheme. */

:root {
  --bg: #fbfbfd;
  --bg-alt: #f5f5f7;
  --ink: #1d1d1f;
  --ink-soft: #6e6e73;
  --ink-faint: #86868b;
  --line: #d2d2d7;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --ease: cubic-bezier(0.28, 0.11, 0.32, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
               "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.003em;
}
body { overflow-x: hidden; min-height: 100%; }

/* Home page activates scroll-snap on the html element (the actual scroll
   container in a normal document). Other pages don't get this class so
   their footers / content scroll normally. */
html.snap-y { height: 100%; scroll-snap-type: y mandatory; }
html.snap-y body { height: 100%; overflow-y: scroll; scroll-behavior: smooth; }
html.snap-y .page, html.snap-y .footer { scroll-snap-align: start; scroll-snap-stop: always; }
a { color: inherit; }

/* Default password banner */
.default-password-banner {
  background: #fff3cd; color: #664d03;
  text-align: center; padding: 10px 16px; font-size: 13px;
  border-bottom: 1px solid #ffe083;
}
.default-password-banner a { color: #664d03; text-decoration: underline; }

/* Nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: 48px;
  background: rgba(251, 251, 253, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: 0 24px;
}
.nav-inner { width: 100%; max-width: 1040px; display: flex; align-items: center; justify-content: space-between; font-size: 14px; }
.nav-logo { font-weight: 500; text-decoration: none; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a { font-size: 12px; opacity: 0.88; text-decoration: none; transition: opacity 0.2s var(--ease); }
.nav-links a:hover { opacity: 1; }

/* Orbs */
.orbs { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
body.page-docs .orbs, body.page-doc-detail .orbs { position: fixed; }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); mix-blend-mode: multiply; will-change: transform, opacity; }
.orb-1 { width: 560px; height: 560px; top: -140px; left: -120px; background: radial-gradient(circle at 30% 30%, #a7c8ff 0%, rgba(167,200,255,0) 65%); animation: breathe 11s ease-in-out infinite, drift1 22s ease-in-out infinite; }
.orb-2 { width: 640px; height: 640px; top: -80px; right: -160px; background: radial-gradient(circle at 60% 40%, #ffc9d9 0%, rgba(255,201,217,0) 65%); animation: breathe 13s ease-in-out -3s infinite, drift2 26s ease-in-out infinite; }
.orb-3 { width: 520px; height: 520px; bottom: -180px; left: 20%; background: radial-gradient(circle at 50% 50%, #c7f0dd 0%, rgba(199,240,221,0) 65%); animation: breathe 9s ease-in-out -5s infinite, drift3 24s ease-in-out infinite; }
.orb-4 { width: 480px; height: 480px; top: 30%; right: 10%; background: radial-gradient(circle at 40% 60%, #e4d4ff 0%, rgba(228,212,255,0) 65%); animation: breathe 14s ease-in-out -2s infinite, drift2 28s ease-in-out -6s infinite; }
.orb-5 { width: 600px; height: 600px; bottom: -200px; right: -120px; background: radial-gradient(circle at 50% 40%, #ffe2b8 0%, rgba(255,226,184,0) 65%); animation: breathe 10s ease-in-out -7s infinite, drift1 30s ease-in-out -4s infinite; }
.orb-6 { width: 440px; height: 440px; top: 10%; left: 35%; background: radial-gradient(circle at 50% 50%, #bfeaff 0%, rgba(191,234,255,0) 65%); animation: breathe 12s ease-in-out -4s infinite, drift3 20s ease-in-out -10s infinite; }
.orb-a { width: 520px; height: 520px; top: -140px; left: -120px; background: radial-gradient(circle at 30% 30%, #a7c8ff 0%, rgba(167,200,255,0) 65%); animation: breathe 11s ease-in-out infinite, drift1 22s ease-in-out infinite; }
.orb-b { width: 520px; height: 520px; top: 20%; right: -160px; background: radial-gradient(circle at 50% 50%, #ffd7e3 0%, rgba(255,215,227,0) 65%); animation: breathe 13s ease-in-out -3s infinite, drift2 26s ease-in-out infinite; }
.orb-c { width: 480px; height: 480px; bottom: -160px; left: 30%; background: radial-gradient(circle at 50% 50%, #d1f0e0 0%, rgba(209,240,224,0) 65%); animation: breathe 10s ease-in-out -6s infinite, drift3 28s ease-in-out infinite; }
.orb-d { width: 440px; height: 440px; top: 60%; right: 10%; background: radial-gradient(circle at 50% 50%, #e4d4ff 0%, rgba(228,212,255,0) 65%); animation: breathe 14s ease-in-out -2s infinite, drift1 30s ease-in-out -8s infinite; }
@keyframes breathe { 0%, 100% { opacity: 0.32; transform: scale(1); } 50% { opacity: 0.72; transform: scale(1.12); } }
@keyframes drift1 { 0%, 100% { translate: 0 0; } 33% { translate: 60px -40px; } 66% { translate: -30px 30px; } }
@keyframes drift2 { 0%, 100% { translate: 0 0; } 50% { translate: -70px 50px; } }
@keyframes drift3 { 0%, 100% { translate: 0 0; } 40% { translate: 40px 60px; } 75% { translate: -50px -20px; } }
@media (prefers-reduced-motion: reduce) { .orb { animation: none !important; opacity: 0.35; } }

/* Home */
.page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 88px 24px 64px; position: relative; overflow: hidden; }
.page-1 { background: linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 100%); }
.page-2 { background: var(--bg); border-top: 1px solid rgba(0,0,0,0.04); }
.hero { width: 100%; max-width: 1040px; display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; position: relative; z-index: 1; }
.hero-left h1 {
  font-size: clamp(40px, 5.4vw, 72px);
  /* 1.2 是默认行高，保证下伸笔画（g/y/p）在 background-clip: text 下完整显示。
     再配合 padding-bottom 给 Safari / 部分 Chrome 版本的额外缓冲。 */
  line-height: 1.2;
  letter-spacing: -0.028em;
  font-weight: 600;
  padding-bottom: 0.25em;
  margin-bottom: calc(20px - 0.25em);
  background: linear-gradient(180deg, #1d1d1f 0%, #434344 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  /* overflow: visible 强制让渐变不被父元素裁。 */
  overflow: visible;
}
.hero-left .tagline { font-size: 21px; line-height: 1.38; color: var(--ink-soft); margin-bottom: 28px; max-width: 460px; }
.meta-list { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 32px; }
.meta-list li { font-size: 14px; color: var(--ink-faint); display: flex; gap: 14px; }
.meta-list li span:first-child { width: 72px; color: var(--ink); font-weight: 500; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; height: 36px; padding: 0 18px; border-radius: 980px; font-size: 13px; text-decoration: none; transition: all 0.22s var(--ease); border: none; cursor: pointer; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-0.5px); }
.btn-ghost { background: transparent; color: var(--accent); padding: 0 6px; }
.hero-right { display: flex; flex-direction: column; position: relative; z-index: 1; }
.panel-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--ink-faint); margin-bottom: 14px; font-weight: 500; }
.repo-list { display: flex; flex-direction: column; gap: 10px; }
.repo-card { background: #fff; border: 1px solid rgba(0,0,0,0.06); border-radius: var(--radius-md); padding: 18px 20px; transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease); text-decoration: none; color: inherit; display: block; }
.repo-card:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,0,0,0.06); }
.repo-card .top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.repo-name { font-size: 15px; font-weight: 500; }
.repo-time { font-size: 12px; color: var(--ink-faint); }
.repo-desc { font-size: 13px; color: var(--ink-soft); line-height: 1.5; }
.repo-card-empty { color: var(--ink-faint); font-size: 13px; }
.scroll-hint { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); font-size: 11px; color: var(--ink-faint); letter-spacing: 0.14em; text-transform: uppercase; opacity: 0.7; animation: drift 2.4s ease-in-out infinite; }
@keyframes drift { 0%,100%{transform:translate(-50%,0);opacity:.5}50%{transform:translate(-50%,6px);opacity:.9} }
.page-2-inner { width: 100%; max-width: 1040px; display: flex; flex-direction: column; gap: 72px; position: relative; z-index: 1; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 24px; }
.section-head h2 { font-size: clamp(28px, 3.2vw, 44px); font-weight: 600; letter-spacing: -0.022em; }
.section-head .see-all { font-size: 13px; color: var(--accent); text-decoration: none; }
.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.project-card { background: #fff; border-radius: var(--radius-lg); padding: 28px; aspect-ratio: 1 / 1.1; display: flex; flex-direction: column; justify-content: space-between; border: 1px solid rgba(0,0,0,0.04); text-decoration: none; color: inherit; transition: transform 0.4s var(--ease); }
.project-card:hover { transform: translateY(-4px); }
.project-card .kicker { font-size: 12px; color: var(--ink-faint); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 10px; }
.project-card h3 { font-size: 26px; font-weight: 600; line-height: 1.12; margin-bottom: 12px; }
.project-card p { font-size: 14px; line-height: 1.5; color: var(--ink-soft); }
.project-card .arrow { width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 14px; align-self: flex-start; margin-top: auto; }
.project-card-empty { justify-content: center; color: var(--ink-faint); }
.docs-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.doc-item { background: var(--bg-alt); border-radius: var(--radius-md); padding: 22px 26px; display: flex; justify-content: space-between; align-items: center; gap: 20px; text-decoration: none; color: inherit; transition: background 0.25s var(--ease), transform 0.25s var(--ease); }
.doc-item:hover { background: #eceef0; transform: translateX(2px); }
.doc-item .doc-text { min-width: 0; flex: 1; }
.doc-item .doc-title { font-size: 19px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 6px; }
.doc-item .doc-excerpt { font-size: 13px; color: var(--ink-soft); line-height: 1.5; margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.doc-item .doc-meta { font-size: 12px; color: var(--ink-faint); }
.doc-item .doc-arrow { color: var(--ink-faint); font-size: 18px; }
.doc-item-empty { justify-content: center; color: var(--ink-faint); }

/* Footer */
.footer { background: #f5f5f7; padding: 72px 24px 48px; border-top: 1px solid rgba(0,0,0,0.04); }
.footer-inner { max-width: 1040px; margin: 0 auto; }
.footer h4 { font-size: 20px; font-weight: 500; margin-bottom: 24px; }
.contact-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius-md); overflow: hidden; margin-bottom: 32px; }
.contact-table th, .contact-table td { padding: 16px 20px; text-align: left; font-size: 14px; border-bottom: 1px solid rgba(0,0,0,0.05); vertical-align: top; }
.contact-table th { background: #fafafa; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.08em; font-size: 12px; font-weight: 500; }
.contact-table td { color: var(--ink-soft); }
.contact-table td ul { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.contact-table tr:last-child th, .contact-table tr:last-child td { border-bottom: none; }
.copyright { font-size: 12px; color: var(--ink-faint); text-align: center; }

/* Docs & projects list share the sidebar shell */
body.page-docs, body.page-projects { background: var(--bg); }
body.page-docs .shell, body.page-projects .shell {
  max-width: 1280px; margin: 0 auto; padding: 88px 32px 64px;
  display: grid; grid-template-columns: 220px 1fr; gap: 56px;
  position: relative; z-index: 1;
}
.sidebar { position: sticky; top: 88px; align-self: start; max-height: calc(100vh - 104px); overflow-y: auto; padding-right: 8px; }
.side-label { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); font-weight: 500; margin-bottom: 14px; padding-left: 12px; }
.side-nav { list-style: none; display: flex; flex-direction: column; gap: 2px; margin-bottom: 36px; }
.side-nav a { display: flex; align-items: center; gap: 10px; padding: 8px 12px; font-size: 14px; text-decoration: none; border-radius: var(--radius-sm); transition: background 0.2s var(--ease), color 0.2s var(--ease); }
.side-nav a:hover { background: rgba(0,0,0,0.04); }
.side-nav a.active { background: rgba(0,113,227,0.08); color: var(--accent); font-weight: 500; }
.side-nav a .count { margin-left: auto; font-size: 11px; color: var(--ink-faint); }
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; padding-left: 12px; }
.tag { font-size: 12px; padding: 5px 10px; background: #f0f0f2; border-radius: 980px; text-decoration: none; transition: background 0.2s var(--ease), color 0.2s var(--ease); }
.tag.active { background: var(--ink); color: #fff; }
.tag .num { margin-left: 4px; color: var(--ink-faint); font-size: 11px; }
.tag.active .num { color: rgba(255,255,255,0.6); }
.archive-list { list-style: none; padding-left: 12px; display: flex; flex-direction: column; gap: 10px; }
.archive-list li { font-size: 13px; color: var(--ink-soft); }
.archive-list a { display: flex; justify-content: space-between; text-decoration: none; color: inherit; }
.archive-list .ar-count { color: var(--ink-faint); font-size: 11px; }

.main { min-width: 0; }
.page-head { margin-bottom: 40px; }
.page-head .kicker { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 14px; }
.page-head h1 {
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 600; letter-spacing: -0.028em;
  line-height: 1.2;
  padding-bottom: 0.25em;
  margin-bottom: calc(14px - 0.25em);
  background: linear-gradient(180deg, #1d1d1f 0%, #434344 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  overflow: visible;
}
.page-head .sub { font-size: 18px; color: var(--ink-soft); max-width: 520px; }
.toolbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid rgba(0,0,0,0.06); }
.toolbar .left { font-size: 13px; color: var(--ink-soft); }
.toolbar .left strong { color: var(--ink); font-weight: 500; }

.doc-list { display: flex; flex-direction: column; }
.doc-row { display: grid; grid-template-columns: 1fr 120px; gap: 32px; padding: 28px 0; border-bottom: 1px solid rgba(0,0,0,0.06); text-decoration: none; color: inherit; }
.doc-row:last-child { border-bottom: none; }
.doc-row .title { font-size: 22px; font-weight: 600; line-height: 1.25; margin-bottom: 10px; }
.doc-row:hover .title { color: var(--accent); }
.doc-row .excerpt { font-size: 14px; color: var(--ink-soft); line-height: 1.55; margin-bottom: 12px; }
.doc-row .meta { display: flex; gap: 12px; align-items: center; font-size: 12px; color: var(--ink-faint); flex-wrap: wrap; }
.doc-row .meta .tag-mini { padding: 3px 8px; background: #f0f0f2; border-radius: 980px; color: var(--ink); font-size: 11px; }
.doc-row .date { text-align: right; font-variant-numeric: tabular-nums; }
.doc-row .date .d { font-size: 28px; font-weight: 600; line-height: 1; }
.doc-row .date .my { font-size: 12px; color: var(--ink-faint); margin-top: 6px; text-transform: uppercase; letter-spacing: 0.08em; }
.doc-row-empty { justify-content: center; color: var(--ink-faint); padding: 40px 0; text-align: center; }

.pager { margin-top: 48px; display: flex; justify-content: center; align-items: center; gap: 8px; }
.pager a, .pager span { min-width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center; padding: 0 10px; font-size: 13px; border-radius: var(--radius-sm); text-decoration: none; color: var(--ink); transition: background 0.2s var(--ease); }
.pager a:hover { background: rgba(0,0,0,0.05); }
.pager .current { background: var(--ink); color: #fff; }

/* Doc detail */
body.page-doc-detail { background: var(--bg); }
.doc-detail { max-width: 740px; margin: 0 auto; padding: 120px 24px 96px; position: relative; z-index: 1; }
.doc-header { margin-bottom: 48px; border-bottom: 1px solid rgba(0,0,0,0.06); padding-bottom: 24px; }
.doc-header .kicker { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 14px; }
.doc-header h1 { font-size: clamp(32px, 4vw, 48px); font-weight: 600; letter-spacing: -0.022em; line-height: 1.1; margin-bottom: 18px; }
.doc-header .meta { display: flex; gap: 12px; align-items: center; font-size: 13px; color: var(--ink-faint); flex-wrap: wrap; }
.doc-header .tag-mini { padding: 3px 8px; background: #f0f0f2; border-radius: 980px; color: var(--ink); font-size: 11px; }
.doc-body { font-size: 17px; line-height: 1.75; color: var(--ink); }
.doc-body h1, .doc-body h2, .doc-body h3 { margin-top: 40px; margin-bottom: 16px; font-weight: 600; letter-spacing: -0.018em; }
.doc-body h2 { font-size: 28px; }
.doc-body h3 { font-size: 22px; }
.doc-body p { margin-bottom: 20px; }
.doc-body ul, .doc-body ol { margin-bottom: 20px; padding-left: 24px; }
.doc-body code { background: #f0f0f2; padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
.doc-body pre { background: #f5f5f7; padding: 16px 18px; border-radius: var(--radius-md); overflow-x: auto; margin-bottom: 20px; }
.doc-body pre code { background: transparent; padding: 0; }
.doc-body a { color: var(--accent); text-decoration: underline; text-decoration-color: rgba(0,113,227,0.3); }
.doc-body blockquote { border-left: 3px solid var(--line); padding-left: 18px; color: var(--ink-soft); margin-bottom: 20px; }
.doc-nav { margin-top: 64px; display: flex; justify-content: space-between; gap: 24px; }
.doc-nav a { font-size: 14px; color: var(--accent); text-decoration: none; max-width: 45%; }
.doc-nav .prev::before { content: "‹ "; }
.doc-nav .next::after { content: " ›"; }

.read-count { margin-top: 32px; font-size: 12px; color: var(--ink-faint); text-align: right; letter-spacing: 0.04em; }
.draft-banner, .archived-banner { padding: 8px 14px; border-radius: var(--radius-sm); font-size: 13px; margin-bottom: 24px; }
.draft-banner { background: #fff3cd; color: #664d03; }
.archived-banner { background: #e2e3e5; color: #41464b; }

/* About block on home page 2 */
.about-bio {
  font-size: clamp(18px, 1.8vw, 22px);
  line-height: 1.55;
  color: var(--ink);
  max-width: 820px;
  letter-spacing: -0.004em;
  margin-bottom: 36px;
  font-weight: 400;
}
.about-bio .muted { color: var(--ink-soft); }
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.about-card {
  background: #fff; border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-lg); padding: 28px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.about-card:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05); }
.about-card .kicker { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); font-weight: 500; margin-bottom: 14px; }
.about-card h4 { font-size: 18px; font-weight: 600; letter-spacing: -0.012em; margin-bottom: 14px; }
.about-card ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.about-card li { font-size: 14px; line-height: 1.5; color: var(--ink-soft); display: flex; justify-content: space-between; gap: 12px; }
.about-card li .yr { color: var(--ink-faint); font-size: 12px; flex-shrink: 0; font-variant-numeric: tabular-nums; }
.about-card .pills { display: flex; flex-wrap: wrap; gap: 6px; }
.about-card .pill { font-size: 12px; padding: 4px 10px; background: #f0f0f2; border-radius: 980px; color: var(--ink); }

/* Projects list */
body.page-projects .status-list { list-style: none; padding-left: 12px; display: flex; flex-direction: column; gap: 10px; }
body.page-projects .status-list a { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-soft); text-decoration: none; padding: 4px 0; transition: color 0.2s var(--ease); }
body.page-projects .status-list a:hover { color: var(--ink); }
body.page-projects .status-list .sd { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
body.page-projects .status-list .sc { margin-left: auto; font-size: 11px; color: var(--ink-faint); font-variant-numeric: tabular-nums; }

/* Featured hero card on /projects */
.featured {
  position: relative; overflow: hidden;
  border-radius: 22px;
  background: linear-gradient(140deg, #1d1d1f 0%, #2d2d30 55%, #1a2a4a 100%);
  color: #f5f5f7;
  padding: 48px;
  margin-bottom: 40px;
  text-decoration: none;
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 40px;
  align-items: end;
  min-height: 280px;
  transition: transform 0.4s var(--ease);
}
.featured:hover { transform: translateY(-3px); }
.featured::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(40% 60% at 85% 20%, rgba(100,160,255,0.35) 0%, transparent 70%),
    radial-gradient(30% 50% at 15% 85%, rgba(255,120,200,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.featured > * { position: relative; z-index: 1; }
.featured .kicker { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255,255,255,0.65); margin-bottom: 16px; }
.featured h2 { font-size: clamp(32px, 4vw, 52px); font-weight: 600; letter-spacing: -0.025em; line-height: 1.05; margin-bottom: 14px; }
.featured p { font-size: 16px; line-height: 1.55; color: rgba(255,255,255,0.75); max-width: 520px; margin-bottom: 24px; }
.featured .pills { display: flex; flex-wrap: wrap; gap: 6px; }
.featured .pills .pill {
  font-size: 11px; padding: 4px 10px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.85);
  border-radius: 980px;
}
.featured .stats {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 4px 24px;
  padding: 18px 0;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.featured .stats .k { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: rgba(255,255,255,0.5); margin-bottom: 4px; }
.featured .stats .v { font-size: 22px; font-weight: 500; font-variant-numeric: tabular-nums; margin-bottom: 14px; letter-spacing: -0.015em; }

/* Project cards */
.proj-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.proj {
  background: #fff;
  border: 1px solid rgba(0,0,0,0.05);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-decoration: none; color: inherit;
  display: flex; flex-direction: column;
  position: relative; overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
  min-height: 240px;
}
.proj:hover { transform: translateY(-3px); box-shadow: 0 14px 36px rgba(0,0,0,0.06); }
.proj::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(120% 80% at 100% 0%, rgba(0,113,227,0.08) 0%, transparent 60%);
  opacity: 0; transition: opacity 0.35s var(--ease); pointer-events: none;
}
.proj:hover::before { opacity: 1; }
.proj > * { position: relative; }
.proj .top { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; margin-bottom: 14px; }
.proj .lang, .proj .status { font-size: 11px; color: var(--ink-faint); letter-spacing: 0.04em; }
.proj h3 { font-size: 22px; font-weight: 600; letter-spacing: -0.015em; line-height: 1.2; margin-bottom: 8px; }
.proj .desc { font-size: 14px; color: var(--ink-soft); line-height: 1.55; margin-bottom: 18px; }
.proj .pills { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.proj .pills .pill { font-size: 11px; padding: 4px 9px; background: #f0f0f2; border-radius: 980px; color: var(--ink); }
.proj .bottom {
  margin-top: auto;
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(0,0,0,0.05);
  font-size: 12px; color: var(--ink-faint);
}
.proj .bottom .metrics { display: flex; gap: 14px; font-variant-numeric: tabular-nums; }
.proj .bottom .metrics span b { font-weight: 500; color: var(--ink); }
.proj .bottom .arrow { color: var(--accent); transition: transform 0.3s var(--ease); }
.proj:hover .bottom .arrow { transform: translateX(4px); }
.proj-empty { justify-content: center; align-items: center; min-height: 120px; color: var(--ink-faint); grid-column: 1 / -1; }

/* Home repo-card small meta line (added in P3) */
.repo-card .repo-meta { font-size: 11px; color: var(--ink-faint); margin-top: 6px; }

/* Readme excerpt block on project detail */
.readme-excerpt { margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(0,0,0,0.06); }
.readme-excerpt h2 { font-size: 20px; margin-bottom: 12px; }

/* --- Admin --- */
body.page-admin-login { background: var(--bg); }
.admin-login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 88px 24px 48px; }
.admin-card { background: #fff; border: 1px solid rgba(0,0,0,0.06); border-radius: var(--radius-lg); padding: 40px; width: 100%; max-width: 420px; display: flex; flex-direction: column; gap: 16px; box-shadow: 0 20px 60px rgba(0,0,0,0.04); }
.admin-card h1 { font-size: 28px; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 4px; }
.admin-card .sub { font-size: 14px; color: var(--ink-soft); margin-bottom: 8px; }
.admin-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--ink-soft); }
.admin-card input { height: 40px; padding: 0 14px; border: 1px solid var(--line); border-radius: var(--radius-sm); font-size: 14px; background: var(--bg-alt); color: var(--ink); font-family: inherit; }
.admin-card input:focus { outline: none; border-color: var(--accent); background: #fff; }
.admin-card .btn { height: 40px; justify-content: center; font-size: 14px; }
.form-err { background: #ffe8e5; color: #8a1f1f; font-size: 13px; padding: 10px 14px; border-radius: var(--radius-sm); }
/* .form-info 是成功 / 提示横幅（如"已保存"）。不能让它长期占位，先显示
   4s 给用户读完，再 1s 淡出并折叠高度，整个元素退出文档流。forwards 让
   终态停在 opacity:0 / max-height:0。.form-err 不加动画，错误必须一直可见。*/
.form-info { background: #e6f4ff; color: #0054a8; font-size: 13px; padding: 10px 14px; border-radius: var(--radius-sm); overflow: hidden; animation: fade-out-banner 1s ease-out 4s forwards; }
@keyframes fade-out-banner {
  to { opacity: 0; max-height: 0; padding-top: 0; padding-bottom: 0; margin-top: 0; margin-bottom: 0; border-width: 0; }
}
.form-row { display: flex; justify-content: space-between; gap: 12px; align-items: center; }

body.page-admin { background: var(--bg-alt); }
.admin-shell { max-width: 960px; margin: 0 auto; padding: 88px 32px 64px; }
.admin-header { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 24px; }
.admin-header h1 { font-size: 32px; font-weight: 600; letter-spacing: -0.02em; }
.admin-session { font-size: 13px; color: var(--ink-soft); display: flex; gap: 14px; align-items: center; }
.admin-warning { background: #fff8dd; color: #714d00; padding: 14px 18px; border-radius: var(--radius-md); font-size: 14px; margin-bottom: 24px; border: 1px solid #ffe083; }
.admin-warning a { color: #714d00; text-decoration: underline; }
.admin-section { background: #fff; border-radius: var(--radius-lg); padding: 24px 28px; margin-bottom: 18px; border: 1px solid rgba(0,0,0,0.05); }
.admin-section h2 { font-size: 18px; font-weight: 600; margin-bottom: 14px; }
.admin-nav { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.admin-nav li { padding: 10px 14px; border-radius: var(--radius-sm); transition: background 0.2s var(--ease); }
.admin-nav li:hover { background: var(--bg-alt); }
.admin-nav li.disabled { color: var(--ink-faint); }
.admin-nav a { text-decoration: none; color: var(--accent); }
.admin-section .note { font-size: 13px; color: var(--ink-soft); }

.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.admin-table th, .admin-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid rgba(0,0,0,0.06); vertical-align: middle; }
.admin-table th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-faint); font-weight: 500; }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table td code { background: var(--bg-alt); padding: 2px 6px; border-radius: 4px; font-size: 12px; }
.admin-table td a { color: var(--accent); text-decoration: none; }
.admin-table td a:hover { text-decoration: underline; }
.admin-table td a + form { margin-left: 10px; }
.link-danger { background: transparent; border: none; color: #c73737; font-size: 13px; cursor: pointer; padding: 0; font-family: inherit; }
.link-danger:hover { text-decoration: underline; }

.status-badge { display: inline-block; padding: 3px 9px; border-radius: 980px; font-size: 11px; font-weight: 500; background: #f0f0f2; color: var(--ink); letter-spacing: 0.02em; }
.status-badge.status-draft { background: #fff4cf; color: #7a5a00; }
.status-badge.status-archived { background: #e5e5ea; color: #636366; }
.status-badge.status-published { background: #d9f5dc; color: #1a6a2e; }
.status-badge.status-active { background: #d9f5dc; color: #1a6a2e; }
.status-badge.status-developing { background: #ffe0bd; color: #a3560a; }

/* Editor */
.editor-form { display: flex; flex-direction: column; gap: 14px; }
.editor-label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-faint); }
.editor-form textarea {
  width: 100%; min-height: 480px;
  padding: 18px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px; line-height: 1.6;
  background: #fbfbfd; color: var(--ink);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  resize: vertical;
  tab-size: 2;
}
.editor-form textarea:focus { outline: none; border-color: var(--accent); }
.editor-actions { display: flex; justify-content: flex-end; gap: 12px; align-items: center; }

/* Settings form */
.settings-form { display: flex; flex-direction: column; gap: 12px; }
.settings-form h2 { margin-top: 12px; font-size: 16px; }
.settings-form label { display: grid; grid-template-columns: 180px 1fr; align-items: center; gap: 12px; font-size: 13px; color: var(--ink-soft); }
.settings-form label em { color: #c73737; font-style: normal; }
.settings-form input { height: 36px; padding: 0 12px; border: 1px solid var(--line); border-radius: var(--radius-sm); font-size: 14px; background: var(--bg-alt); color: var(--ink); font-family: inherit; }
.settings-form input:focus, .settings-form textarea:focus { outline: none; border-color: var(--accent); background: #fff; }
.settings-form label.block-label { display: flex; flex-direction: column; gap: 6px; }
.settings-form label.block-label span { padding-left: 2px; }
.settings-form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 13px; line-height: 1.5;
  background: var(--bg-alt); color: var(--ink);
  font-family: "SF Mono", Menlo, Consolas, monospace;
  resize: vertical;
}

/* Images */
.image-upload { display: flex; gap: 12px; align-items: center; }
.image-thumb { width: 48px; height: 48px; object-fit: cover; border-radius: var(--radius-sm); background: var(--bg-alt); }

/* Responsive */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 48px; }
  .project-grid { grid-template-columns: 1fr; }
  .docs-list { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  body.page-docs .shell, body.page-projects .shell { grid-template-columns: 1fr; gap: 32px; }
  .sidebar { position: relative; top: 0; max-height: none; }
  .doc-row { grid-template-columns: 1fr; gap: 12px; }
  .doc-row .date { text-align: left; display: flex; align-items: baseline; gap: 10px; }
  .doc-row .date .d { font-size: 14px; font-weight: 500; }
  .doc-row .date .my { margin-top: 0; }
  .featured { grid-template-columns: 1fr; padding: 32px; min-height: 240px; }
  .proj-grid { grid-template-columns: 1fr; }
}

/* WI-2.20 暗色模式 — follows system only (per requirement 2.9) */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000;
    --bg-alt: #151518;
    --ink: #f5f5f7;
    --ink-soft: #a1a1a6;
    --ink-faint: #6e6e73;
    --line: #2d2d30;
    --accent: #2997ff;
    --accent-hover: #4aaaff;
  }
  html, body { background: var(--bg); color: var(--ink); }
  .nav { background: rgba(0,0,0,0.72); border-bottom: 1px solid rgba(255,255,255,0.08); }
  .page-1 { background: linear-gradient(180deg, #000 0%, #0a0a0d 100%); }
  .page-2 { background: var(--bg); border-top: 1px solid rgba(255,255,255,0.05); }
  .hero-left h1, .page-head h1 { background: linear-gradient(180deg, #f5f5f7 0%, #a1a1a6 100%); -webkit-background-clip: text; background-clip: text; }
  .repo-card, .project-card { background: #151518; border-color: rgba(255,255,255,0.06); }
  .doc-item, .tag, .doc-row .meta .tag-mini, .doc-header .tag-mini { background: #1c1c1e; color: var(--ink); }
  .doc-item:hover { background: #2a2a2d; }
  .tag.active { background: var(--ink); color: #000; }
  .tag .num { color: var(--ink-faint); }
  .footer { background: #0a0a0d; border-top-color: rgba(255,255,255,0.05); }
  .contact-table { background: #151518; }
  .contact-table th { background: #0a0a0d; color: var(--ink-faint); }
  .contact-table th, .contact-table td { border-bottom-color: rgba(255,255,255,0.05); }
  .doc-body code, .doc-body pre { background: #151518; }
  .doc-body pre { border: 1px solid rgba(255,255,255,0.04); }
  .proj { background: #151518; border-color: rgba(255,255,255,0.06); }
  .proj:hover { box-shadow: 0 14px 36px rgba(0,0,0,0.4); }
  .proj .pills .pill { background: #26262a; color: var(--ink); }
  .proj .bottom { border-top-color: rgba(255,255,255,0.05); }
  body.page-projects .status-list a:hover { color: var(--ink); }
  /* Orbs desaturated in dark mode per requirement */
  .orb { mix-blend-mode: screen; filter: blur(80px) saturate(0.55) brightness(0.7); }
  .default-password-banner { background: #332b00; color: #ffd280; border-bottom-color: #664d00; }
  .draft-banner { background: #332b00; color: #ffd280; }
  .archived-banner { background: #2c2c2e; color: #a1a1a6; }
}

/* ----- /docs 三种 view：目录 / 标签 / 归档（Apple-style） ----- */
/* 核心设计：去重边框、hairline 分隔、typography hierarchy、SF 风缓动曲线、
   active 态不用加粗 bg 而是主色渐淡。与 .doc-row / .repo-card 保持语言一致。*/
.tree-view, .archive-view, .tag-catalog { margin-top: 4px; }

/* 共用的 details/summary 基础 */
.tree-node, .archive-year, .archive-month { border: none; }
.tree-node > summary,
.archive-year > summary,
.archive-month > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  transition: color 0.2s var(--ease);
}
.tree-node > summary::-webkit-details-marker,
.archive-year > summary::-webkit-details-marker,
.archive-month > summary::-webkit-details-marker { display: none; }
.tree-node > summary::before,
.archive-year > summary::before,
.archive-month > summary::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--ink-faint);
  border-bottom: 1.5px solid var(--ink-faint);
  transform: rotate(-45deg) translate(2px, -2px);
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease);
}
.tree-node[open] > summary::before,
.archive-year[open] > summary::before,
.archive-month[open] > summary::before {
  transform: rotate(45deg) translate(-1px, -1px);
  border-color: var(--accent);
}
.tree-node > summary:hover,
.archive-year > summary:hover,
.archive-month > summary:hover { color: var(--accent); }
.tree-count {
  font-size: 12px;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* 目录树（Category） */
.tree-name { font-size: 17px; font-weight: 500; flex: 1; }
.tree-body { padding: 6px 0 14px 22px; }
.tree-node .tree-node > summary {
  padding: 12px 0;
  font-size: 15px;
  border-bottom-color: transparent;
}
.tree-node .tree-name { font-size: 15px; font-weight: 400; }

/* 归档（Archive） — Year / Month 视觉层级明显分开 */
.archive-year > summary { padding: 22px 0; border-bottom-color: rgba(0,0,0,0.08); }
.archive-year > summary .archive-key {
  font-size: 34px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
  flex: 1;
  font-variant-numeric: tabular-nums;
}
.archive-months { padding: 4px 0 18px 32px; }
.archive-month > summary {
  padding: 10px 0;
  border-bottom-color: transparent;
}
.archive-month .archive-key {
  font-size: 15px;
  font-weight: 500;
  flex: 1;
  color: var(--ink-soft);
}
.archive-month[open] .archive-key { color: var(--ink); }
.archive-docs { padding: 4px 0 8px 18px; }

/* Tree-doc（目录 / 归档末梢的文章链接） — 薄行、悬停轻微推移与主色 */
.tree-doc {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 10px 0;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid rgba(0,0,0,0.04);
  transition: color 0.2s var(--ease), transform 0.28s var(--ease);
}
.tree-doc:last-child { border-bottom: none; }
.tree-doc:hover { color: var(--accent); transform: translateX(2px); }
.tree-doc-title { flex: 1; font-size: 14px; }
.tree-doc-date {
  font-size: 12px;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* 标签目录 — 卡片模仿 .repo-card 的 hairline + 细腻阴影抬升 */
.tag-catalog {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 20px;
}
.tag-card {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.2s var(--ease);
}
.tag-card:hover {
  transform: translateY(-1px);
  border-color: rgba(0,113,227,0.28);
  box-shadow: 0 10px 24px -12px rgba(0,113,227,0.22);
}
.tag-card.active {
  border-color: var(--accent);
  background: rgba(0,113,227,0.06);
  color: var(--accent);
}
.tag-card.active .tag-card-count { color: var(--accent); opacity: 0.75; }
.tag-card-name { font-size: 15px; font-weight: 500; letter-spacing: -0.005em; }
.tag-card-count {
  font-size: 12px;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* Dark-mode overrides */
@media (prefers-color-scheme: dark) {
  .tree-node > summary,
  .archive-year > summary,
  .archive-month > summary { border-bottom-color: rgba(255,255,255,0.08); }
  .archive-year > summary { border-bottom-color: rgba(255,255,255,0.12); }
  .tree-doc { border-bottom-color: rgba(255,255,255,0.06); }
  .tag-card { background: #1c1c1e; border-color: rgba(255,255,255,0.08); }
  .tag-card:hover { border-color: rgba(10,132,255,0.45); box-shadow: 0 10px 24px -12px rgba(10,132,255,0.28); }
  .tag-card.active { background: rgba(10,132,255,0.12); }
}