/* ============================================================
   Flying Log · 工程师的飞行日志
   设计语言：工程蓝图底 × Java 橙 × 终端墨绿
   ============================================================ */

:root {
  --paper: #f2f5f7;
  --card: #ffffff;
  --ink: #15202e;
  --ink-soft: #4c5b70;
  --ink-faint: #8a97ab;
  --line: #d6dee6;
  --line-soft: #e4eaef;

  --orange: #e76f00;          /* Java 橙 */
  --orange-deep: #b85700;
  --orange-soft: #fff1e2;
  --blue: #1d5fbf;            /* 工程蓝 */
  --blue-soft: #e7effc;
  --green: #0e8a6a;           /* 终端绿 */
  --green-soft: #e2f5ee;
  --slate: #233043;           /* 深色面板 */
  --slate-deep: #16202e;

  --font-display: "Fraunces", "Noto Serif SC", "Songti SC", serif;
  --font-body: "Manrope", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;

  --shadow-1: 0 1px 2px rgba(21, 32, 46, .05), 0 8px 24px -12px rgba(21, 32, 46, .14);
  --shadow-2: 0 2px 4px rgba(21, 32, 46, .06), 0 18px 40px -16px rgba(21, 32, 46, .22);
  --radius: 4px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background:
    linear-gradient(rgba(29, 95, 191, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 95, 191, .045) 1px, transparent 1px),
    linear-gradient(rgba(29, 95, 191, .028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 95, 191, .028) 1px, transparent 1px),
    radial-gradient(1100px 620px at 88% -8%, #fdf0e2 0%, rgba(253, 240, 226, 0) 60%),
    radial-gradient(900px 560px at -12% 26%, #e6effb 0%, rgba(230, 239, 251, 0) 55%),
    var(--paper);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px, auto, auto, auto;
  background-attachment: fixed;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--orange); color: #fff; }

a { color: var(--blue); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--orange); }

.mono { font-family: var(--font-mono); }

/* ---------- 顶部阅读进度条 ---------- */
.progress-bar {
  position: fixed; top: 0; left: 0;
  width: 0%; height: 3px; z-index: 200;
  background: linear-gradient(90deg, var(--orange), #ffb15e);
  box-shadow: 0 0 10px rgba(231, 111, 0, .55);
  transition: width .08s linear;
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(242, 245, 247, .82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: 1180px; margin: 0 auto;
  padding: 14px 28px;
  display: flex; align-items: center; gap: 32px;
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand-mark {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  background: var(--orange);
  color: #fff;
  font: 700 14px/1 var(--font-mono);
  letter-spacing: .5px;
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  transition: transform .25s ease;
}
.brand:hover .brand-mark { transform: rotate(-6deg) scale(1.06); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong {
  font-family: var(--font-display);
  font-size: 21px; font-weight: 900; letter-spacing: .2px;
}
.brand-text strong i { font-style: normal; color: var(--orange); }
.brand-text em {
  font-style: normal;
  font: 500 9px/1.4 var(--font-mono);
  letter-spacing: 2.4px; color: var(--ink-faint);
}
.site-nav { display: flex; gap: 26px; margin-left: 12px; }
.site-nav a {
  display: flex; flex-direction: column; line-height: 1.2;
  color: var(--ink-soft); font-weight: 600; font-size: 15px;
  padding: 4px 2px; position: relative;
}
.site-nav a .nav-sub {
  font: 400 9.5px/1.3 var(--font-mono);
  color: var(--ink-faint); letter-spacing: 1px;
}
.site-nav a::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  width: 100%; height: 3px; background: var(--orange);
  transform: scaleX(0); transform-origin: left;
  transition: transform .25s cubic-bezier(.65, 0, .35, 1);
}
.site-nav a:hover { color: var(--ink); }
.site-nav a:hover::after, .site-nav a.active::after { transform: scaleX(1); }
.site-nav a.active { color: var(--orange-deep); }
.header-status {
  margin-left: auto;
  display: flex; align-items: center; gap: 10px;
  font-size: 11px; color: var(--ink-soft); letter-spacing: 1px;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(14, 138, 106, .5);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(14, 138, 106, .45); }
  70% { box-shadow: 0 0 0 8px rgba(14, 138, 106, 0); }
  100% { box-shadow: 0 0 0 0 rgba(14, 138, 106, 0); }
}
.clock { color: var(--ink-faint); }

/* ============================================================
   通用布局 & 动效
   ============================================================ */
.site-main {
  max-width: 1180px; margin: 0 auto;
  padding: 0 28px; min-height: 72vh;
}
.reveal {
  opacity: 0; transform: translateY(26px);
  transition: opacity .65s ease, transform .65s cubic-bezier(.22, 1, .36, 1);
}
.reveal.in { opacity: 1; transform: none; }

.kicker {
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 2.6px; text-transform: uppercase;
  color: var(--orange-deep);
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 14px;
}
.kicker::before {
  content: ""; width: 34px; height: 2px; background: var(--orange);
}

/* ============================================================
   首页 · 终端启动日志开场
   ============================================================ */
.boot-term {
  margin: 44px 0 40px;
  background: var(--slate-deep);
  border: 1px solid #2c3b52;
  border-radius: 10px;
  box-shadow: var(--shadow-2);
  overflow: hidden;
  animation: rise .7s cubic-bezier(.22, 1, .36, 1) both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: none; }
}
.boot-term-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  background: #1b2738; border-bottom: 1px solid #2c3b52;
}
.boot-term-bar .dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.r { background: #f5544d; } .dot.y { background: #f5b548; } .dot.g { background: #3ecf6a; }
.boot-term-bar .term-title {
  margin-left: 8px;
  font: 400 11px var(--font-mono); color: #7d90ab; letter-spacing: .6px;
}
.boot-lines {
  padding: 22px 24px 18px;
  font: 400 13.5px/1.9 var(--font-mono);
  color: #b9c7da;
  min-height: 172px;
}
.boot-lines .ln { display: block; opacity: 0; }
.boot-lines .ln.show { opacity: 1; }
.ln .pfx { color: var(--green); }
.ln .ok { color: #3ecf6a; font-weight: 700; }
.ln .dim { color: #647a97; }
.ln .hl { color: #ffb15e; font-weight: 700; }
.ln.typing::after { content: "▍"; color: var(--orange); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.home-hero {
  display: grid;
  grid-template-columns: 1.35fr .85fr;
  gap: 44px; align-items: start;
  margin-bottom: 56px;
}
.home-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 5.6vw, 66px);
  font-weight: 900; line-height: 1.06;
  letter-spacing: -.5px;
  margin-bottom: 20px;
}
.home-hero h1 .w-en { font-style: italic; color: var(--blue); }
.home-hero h1 .w-or {
  color: var(--orange);
  text-decoration: underline;
  text-decoration-thickness: 5px;
  text-underline-offset: 7px;
  text-decoration-color: rgba(231, 111, 0, .35);
}
.home-desc {
  color: var(--ink-soft); font-size: 17px; max-width: 52ch;
  margin-bottom: 26px;
}
.home-stats { display: flex; gap: 34px; flex-wrap: wrap; }
.stat-item { display: flex; flex-direction: column; }
.stat-num {
  font: 700 30px/1.1 var(--font-mono); color: var(--ink);
}
.stat-num b { color: var(--orange); font-size: 20px; }
.stat-label {
  font: 500 10.5px var(--font-mono); letter-spacing: 1.8px;
  color: var(--ink-faint); text-transform: uppercase; margin-top: 5px;
}
.tech-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 22px 24px;
  position: relative;
}
.tech-card::after {
  content: "SPEC"; position: absolute; top: -1px; right: 14px;
  font: 700 9px var(--font-mono); letter-spacing: 2px;
  background: var(--orange); color: #fff;
  padding: 3px 8px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 78%, 0 100%);
}
.tech-card h3 {
  font: 700 13px var(--font-mono); letter-spacing: 1.6px;
  color: var(--ink-soft); margin-bottom: 14px;
}
.spec-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 0; border-bottom: 1px dashed var(--line-soft);
  font-size: 13.5px;
}
.spec-row:last-child { border-bottom: none; }
.spec-row .k { font-family: var(--font-mono); color: var(--ink-faint); font-size: 12px; }
.spec-row .v { font-weight: 700; color: var(--ink); }
.spec-row .v.orange { color: var(--orange-deep); }
.spec-row .v.blue { color: var(--blue); }
.spec-row .v.green { color: var(--green); }

/* ---------- 区块标题 ---------- */
.section-head {
  display: flex; align-items: baseline; gap: 16px;
  margin: 8px 0 26px;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 12px;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: 30px; font-weight: 900;
}
.section-head .sec-path {
  font: 400 12px var(--font-mono); color: var(--ink-faint);
}
.section-head .sec-count {
  margin-left: auto;
  font: 700 12px var(--font-mono); color: var(--orange-deep);
  background: var(--orange-soft);
  padding: 4px 10px; border-radius: 3px;
}

/* ============================================================
   文章卡片
   ============================================================ */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 26px;
  margin-bottom: 64px;
}
.post-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 26px 20px;
  display: flex; flex-direction: column; gap: 14px;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-1);
  transition: transform .28s cubic-bezier(.22, 1, .36, 1),
              box-shadow .28s ease, border-color .28s ease;
  cursor: pointer;
}
.post-card::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 4px;
  background: linear-gradient(180deg, var(--orange), var(--orange-deep));
  transform: scaleY(0); transform-origin: top;
  transition: transform .3s ease;
}
.post-card::after {
  content: attr(data-index);
  position: absolute; top: 10px; right: 14px;
  font: 700 44px/1 var(--font-display);
  color: var(--ink); opacity: .05;
  transition: opacity .28s ease, color .28s ease;
}
.post-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-2);
  border-color: rgba(231, 111, 0, .4);
}
.post-card:hover::before { transform: scaleY(1); }
.post-card:hover::after { opacity: .12; color: var(--orange); }
.post-card:hover .card-title { color: var(--orange-deep); }

.card-meta {
  display: flex; align-items: center; gap: 10px;
  font: 500 11.5px var(--font-mono); color: var(--ink-faint);
  letter-spacing: .4px;
}
.card-meta .m-date { color: var(--blue); font-weight: 700; }
.card-meta .m-cat {
  background: var(--blue-soft); color: var(--blue);
  padding: 2px 8px; border-radius: 3px; font-weight: 700;
}
.card-title {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 700; line-height: 1.35;
  color: var(--ink);
  transition: color .2s ease;
}
.card-excerpt {
  font-size: 14.5px; color: var(--ink-soft); line-height: 1.75;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}
.card-foot {
  display: flex; align-items: center; gap: 8px;
  padding-top: 14px; border-top: 1px dashed var(--line-soft);
  flex-wrap: wrap;
}
.card-foot .more {
  margin-left: auto;
  font: 700 12px var(--font-mono); color: var(--orange-deep);
  display: inline-flex; align-items: center; gap: 5px;
  transition: gap .2s ease;
}
.post-card:hover .more { gap: 10px; }

/* 标签 chip */
.chip {
  font: 600 11.5px var(--font-mono);
  padding: 3px 10px;
  border-radius: 3px;
  border: 1px solid var(--line);
  background: #f7f9fb;
  color: var(--ink-soft);
  transition: all .18s ease;
  display: inline-block;
  line-height: 1.5;
}
.chip:hover {
  border-color: var(--orange); color: var(--orange-deep);
  background: var(--orange-soft);
  transform: translateY(-1px);
}

/* ============================================================
   文章详情
   ============================================================ */
.article-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 56px;
  padding: 44px 0 70px;
  align-items: start;
}
.article-back {
  font: 600 12.5px var(--font-mono); color: var(--ink-faint);
  display: inline-flex; align-items: center; gap: 6px;
  margin-bottom: 22px;
}
.article-back:hover { color: var(--orange-deep); }
.article-head { margin-bottom: 34px; }
.article-head .a-kicker {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  font: 600 12px var(--font-mono); color: var(--ink-faint);
  margin-bottom: 16px;
}
.article-head .a-kicker .a-date { color: var(--blue); }
.article-head h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 4.4vw, 48px);
  font-weight: 900; line-height: 1.18; letter-spacing: -.3px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 3px double var(--ink);
}
.a-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.badge {
  font: 700 11px var(--font-mono); letter-spacing: .8px;
  padding: 5px 12px; border-radius: 3px;
  display: inline-flex; align-items: center; gap: 6px;
}
.badge.b-orange { background: var(--orange-soft); color: var(--orange-deep); border: 1px solid rgba(231, 111, 0, .3); }
.badge.b-blue { background: var(--blue-soft); color: var(--blue); border: 1px solid rgba(29, 95, 191, .25); }
.badge.b-green { background: var(--green-soft); color: var(--green); border: 1px solid rgba(14, 138, 106, .25); }

/* Markdown 正文 */
.md-body { font-size: 16.5px; color: var(--ink); max-width: 76ch; }
.md-body > *:first-child { margin-top: 0; }
.md-body p { margin: 0 0 1.15em; }
.md-body h2 {
  font-family: var(--font-display);
  font-size: 27px; font-weight: 900;
  margin: 2.1em 0 .8em;
  padding-left: 16px;
  border-left: 5px solid var(--orange);
  line-height: 1.3;
  scroll-margin-top: 96px;
}
.md-body h3 {
  font-family: var(--font-display);
  font-size: 21px; font-weight: 700;
  margin: 1.7em 0 .7em;
  color: var(--blue);
  scroll-margin-top: 96px;
}
.md-body h3::before {
  content: "§"; font-family: var(--font-mono);
  color: var(--orange); margin-right: 8px; font-size: 17px;
}
.md-body h4 { font-size: 17px; font-weight: 800; margin: 1.4em 0 .6em; }
.md-body ul, .md-body ol { margin: 0 0 1.15em 1.5em; }
.md-body li { margin-bottom: .4em; padding-left: .2em; }
.md-body li::marker { color: var(--orange); font-weight: 700; }
.md-body blockquote {
  margin: 1.4em 0; padding: 16px 20px;
  background: var(--blue-soft);
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--ink-soft); font-size: 15.5px;
}
.md-body blockquote p { margin: 0; }
.md-body blockquote code { background: rgba(29, 95, 191, .12); }
.md-body strong { color: var(--ink); font-weight: 800; }
.md-body em { font-style: italic; }
.md-body hr {
  border: none; height: 1px; margin: 2.4em 0;
  background: repeating-linear-gradient(90deg, var(--line) 0 8px, transparent 8px 14px);
}
.md-body a { border-bottom: 1.5px solid rgba(29, 95, 191, .4); font-weight: 600; }
.md-body a:hover { border-bottom-color: var(--orange); }
.md-body table {
  width: 100%; border-collapse: collapse; margin: 1.4em 0;
  font-size: 14.5px;
  box-shadow: var(--shadow-1);
}
.md-body th {
  background: var(--slate); color: #fff;
  font: 700 12.5px var(--font-mono); letter-spacing: .6px;
  text-align: left; padding: 10px 14px;
}
.md-body td {
  padding: 10px 14px; border-bottom: 1px solid var(--line-soft);
  background: var(--card);
}
.md-body tr:hover td { background: #fafbfd; }
.md-body img { max-width: 100%; border-radius: var(--radius); box-shadow: var(--shadow-1); }

/* 行内 code */
.md-body code:not(pre code) {
  font-family: var(--font-mono); font-size: .86em;
  background: var(--orange-soft); color: var(--orange-deep);
  padding: 2px 7px; border-radius: 3px;
  border: 1px solid rgba(231, 111, 0, .18);
  font-weight: 500;
}

/* 代码块（带文件头 + 复制） */
.code-block {
  margin: 1.5em 0; border-radius: 8px; overflow: hidden;
  box-shadow: var(--shadow-1);
  border: 1px solid #2c3b52;
}
.code-bar {
  display: flex; align-items: center; gap: 8px;
  background: #1b2738; padding: 8px 14px;
  border-bottom: 1px solid #2c3b52;
}
.code-bar .dot { width: 10px; height: 10px; border-radius: 50%; }
.code-bar .code-lang {
  font: 600 10.5px var(--font-mono); letter-spacing: 1.4px;
  color: #ffb15e; text-transform: uppercase; margin-left: 6px;
}
.code-copy {
  margin-left: auto;
  font: 600 11px var(--font-mono);
  color: #7d90ab; background: transparent;
  border: 1px solid #35485f; border-radius: 3px;
  padding: 3px 10px; cursor: pointer;
  transition: all .18s ease;
}
.code-copy:hover { color: #fff; border-color: var(--orange); background: rgba(231, 111, 0, .25); }
.code-copy.done { color: #3ecf6a; border-color: #3ecf6a; }
.code-block pre {
  margin: 0 !important; border-radius: 0 !important;
  font-size: 13.5px !important; line-height: 1.7 !important;
}
.code-block pre code { font-family: var(--font-mono) !important; }

/* TOC */
.toc {
  position: sticky; top: 96px;
  border-left: 2px solid var(--line);
  padding-left: 18px;
  font-size: 13px;
}
.toc h4 {
  font: 700 11px var(--font-mono); letter-spacing: 2px;
  color: var(--ink-faint); margin-bottom: 14px;
  text-transform: uppercase;
}
.toc a {
  display: block; color: var(--ink-soft);
  padding: 5px 0; line-height: 1.5;
  border-left: 2px solid transparent;
  margin-left: -20px; padding-left: 18px;
  transition: all .18s ease;
}
.toc a.lvl-3 { padding-left: 32px; font-size: 12.5px; }
.toc a:hover { color: var(--orange-deep); }
.toc a.active {
  color: var(--orange-deep); font-weight: 700;
  border-left-color: var(--orange);
}
.toc-nav-card {
  margin-top: 26px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px;
  box-shadow: var(--shadow-1);
}
.toc-nav-card .pn {
  display: block; padding: 8px 0; font-size: 12.5px;
  color: var(--ink-soft); line-height: 1.45;
  border-bottom: 1px dashed var(--line-soft);
}
.toc-nav-card .pn:last-child { border-bottom: none; }
.toc-nav-card .pn:hover { color: var(--orange-deep); }
.toc-nav-card .pn b { font: 700 9.5px var(--font-mono); display: block; letter-spacing: 1.6px; color: var(--ink-faint); }

/* 文末 tag + 上下篇 */
.article-end-tags {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-top: 44px; padding-top: 22px;
  border-top: 1px solid var(--line);
}
.post-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
  margin-top: 30px;
}
.pn-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px 20px;
  transition: all .22s ease; display: block;
  box-shadow: var(--shadow-1);
}
.pn-card:hover { border-color: var(--orange); transform: translateY(-2px); box-shadow: var(--shadow-2); }
.pn-card b {
  display: block; font: 700 10px var(--font-mono);
  letter-spacing: 2px; color: var(--ink-faint); margin-bottom: 7px;
}
.pn-card span {
  font-family: var(--font-display); font-weight: 700;
  font-size: 15.5px; color: var(--ink); line-height: 1.4;
  display: block;
}
.pn-card:hover span { color: var(--orange-deep); }
.pn-card.next { text-align: right; }

/* ============================================================
   标签页
   ============================================================ */
.tags-page { padding: 46px 0 70px; }
.page-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 4.6vw, 54px);
  font-weight: 900; line-height: 1.1;
  margin-bottom: 10px;
}
.page-title .slash { color: var(--orange); font-family: var(--font-mono); font-weight: 400; }
.page-sub {
  font: 400 13px var(--font-mono); color: var(--ink-faint);
  margin-bottom: 40px; letter-spacing: .6px;
}
.tag-cloud {
  display: flex; flex-wrap: wrap; gap: 12px;
  margin-bottom: 52px;
  padding: 26px;
  background: var(--card);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}
.tag-big {
  font: 700 14px var(--font-mono);
  padding: 8px 16px; border-radius: 3px;
  border: 1px solid var(--line); background: #f7f9fb;
  color: var(--ink-soft); cursor: pointer;
  transition: all .2s ease;
}
.tag-big sup { color: var(--orange-deep); font-weight: 700; margin-left: 4px; }
.tag-big:hover, .tag-big.active {
  background: var(--orange); border-color: var(--orange);
  color: #fff; transform: translateY(-2px);
  box-shadow: 0 6px 16px -6px rgba(231, 111, 0, .5);
}
.tag-big:hover sup, .tag-big.active sup { color: #ffd9b3; }
.tag-filter-note {
  font: 600 13px var(--font-mono); color: var(--blue);
  margin-bottom: 20px; display: flex; align-items: center; gap: 10px;
}
.tag-filter-note button {
  font: 700 11px var(--font-mono); cursor: pointer;
  background: none; border: 1px solid var(--line);
  border-radius: 3px; padding: 2px 8px; color: var(--ink-soft);
  transition: all .15s ease;
}
.tag-filter-note button:hover { color: #c0392b; border-color: #c0392b; }
.tag-group-title {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 900; margin: 34px 0 16px;
  display: flex; align-items: center; gap: 12px;
}
.tag-group-title::after {
  content: ""; flex: 1; height: 1px; background: var(--line);
}
.tag-post-list { display: flex; flex-direction: column; gap: 10px; }
.tag-post-item {
  display: flex; align-items: baseline; gap: 16px;
  background: var(--card);
  border: 1px solid transparent;
  padding: 14px 18px; border-radius: var(--radius);
  transition: all .2s ease;
}
.tag-post-item:hover {
  border-color: var(--line); box-shadow: var(--shadow-1);
  transform: translateX(6px);
}
.tag-post-item .tp-date {
  font: 700 12px var(--font-mono); color: var(--blue); white-space: nowrap;
}
.tag-post-item .tp-title {
  font-weight: 700; color: var(--ink); font-size: 15.5px;
  flex: 1; transition: color .18s ease;
}
.tag-post-item:hover .tp-title { color: var(--orange-deep); }
.tag-post-item .tp-read {
  font: 400 11px var(--font-mono); color: var(--ink-faint); white-space: nowrap;
}

/* ============================================================
   关于页
   ============================================================ */
.about-page {
  display: grid; grid-template-columns: 1fr .92fr;
  gap: 52px; align-items: start;
  padding: 46px 0 70px;
}
.about-main h1 { margin-bottom: 24px; }
.about-lead {
  font-size: 17.5px; color: var(--ink-soft); margin-bottom: 30px;
  border-left: 4px solid var(--orange); padding-left: 18px;
}
.about-block { margin-bottom: 30px; }
.about-block h3 {
  font-family: var(--font-display); font-size: 21px; font-weight: 900;
  margin-bottom: 12px;
}
.about-block h3 span { font: 400 12px var(--font-mono); color: var(--orange-deep); margin-left: 10px; }
.about-block p { color: var(--ink-soft); margin-bottom: 10px; }
.about-block ul { margin-left: 1.4em; color: var(--ink-soft); }
.about-block li { margin-bottom: 6px; }
.about-block li::marker { color: var(--orange); }
.skill-bars { display: flex; flex-direction: column; gap: 14px; margin-top: 8px; }
.skill-row .skill-top {
  display: flex; justify-content: space-between;
  font: 600 12.5px var(--font-mono); margin-bottom: 5px;
}
.skill-row .skill-top .pct { color: var(--orange-deep); }
.skill-bar {
  height: 10px; background: #e6ecf1; border-radius: 20px; overflow: hidden;
}
.skill-bar i {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--orange), #ffa04d);
  border-radius: 20px;
  transition: width 1.2s cubic-bezier(.22, 1, .36, 1) .3s;
}
.skill-bar.blue i { background: linear-gradient(90deg, var(--blue), #5b8fe0); }
.skill-bar.green i { background: linear-gradient(90deg, var(--green), #37b58f); }

.about-side { display: flex; flex-direction: column; gap: 24px; }
.manifesto {
  background: var(--slate-deep); color: #b9c7da;
  border-radius: 10px; overflow: hidden;
  box-shadow: var(--shadow-2);
  border: 1px solid #2c3b52;
}
.manifesto .boot-term-bar { background: #1b2738; }
.manifesto pre {
  font: 400 13px/1.9 var(--font-mono);
  padding: 20px 22px; overflow-x: auto;
}
.manifesto .cm { color: #647a97; } .manifesto .kw { color: #ffb15e; font-weight: 700; }
.manifesto .st { color: #8ce99a; } .manifesto .ty { color: #74b8ff; }
.contact-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow-1);
  border-top: 3px solid var(--blue);
}
.contact-card h3 {
  font: 700 13px var(--font-mono); letter-spacing: 1.6px;
  margin-bottom: 16px; color: var(--ink-soft);
}
.contact-row {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 0; border-bottom: 1px dashed var(--line-soft);
  font-size: 14px;
}
.contact-row:last-child { border-bottom: none; }
.contact-row .c-ico {
  width: 30px; height: 30px; display: grid; place-items: center;
  background: var(--blue-soft); color: var(--blue);
  border-radius: 3px; font: 700 12px var(--font-mono);
  flex-shrink: 0;
}
.contact-row .c-k { font: 600 11px var(--font-mono); color: var(--ink-faint); width: 64px; }
.contact-row .c-v { font-weight: 600; color: var(--ink); word-break: break-all; }
.timeline { border-left: 2px solid var(--line); margin-left: 6px; padding-left: 22px; }
.tl-item { position: relative; padding-bottom: 20px; }
.tl-item:last-child { padding-bottom: 4px; }
.tl-item::before {
  content: ""; position: absolute; left: -28px; top: 6px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--orange); border: 2px solid var(--paper);
  box-shadow: 0 0 0 2px var(--orange);
}
.tl-item .tl-t { font: 700 11.5px var(--font-mono); color: var(--blue); letter-spacing: .6px; }
.tl-item .tl-d { font-size: 14.5px; font-weight: 700; }
.tl-item .tl-s { font-size: 13px; color: var(--ink-faint); }

/* ============================================================
   404
   ============================================================ */
.notfound {
  text-align: center; padding: 110px 0 130px;
}
.notfound .nf-code {
  font: 900 clamp(80px, 14vw, 150px)/1 var(--font-display);
  color: var(--ink); letter-spacing: -4px;
  text-shadow: 6px 6px 0 var(--orange-soft);
}
.notfound .nf-msg {
  font: 600 14px var(--font-mono); color: var(--orange-deep);
  margin: 18px 0 8px; letter-spacing: 1px;
}
.notfound .nf-sub { color: var(--ink-faint); font-size: 14.5px; margin-bottom: 30px; }
.btn-home {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--orange); color: #fff;
  font: 700 13px var(--font-mono); letter-spacing: 1px;
  padding: 13px 26px; border-radius: 3px;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 92% 100%, 0 100%);
  transition: all .2s ease;
}
.btn-home:hover { background: var(--orange-deep); color: #fff; transform: translateY(-2px); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, .55);
  margin-top: 40px;
}
.footer-inner {
  max-width: 1180px; margin: 0 auto;
  padding: 26px 28px;
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap;
  font-size: 12px; color: var(--ink-faint);
}
.footer-cmd { color: var(--green); }
.footer-eof { margin-left: auto; color: var(--orange-deep); font-weight: 700; }
.footer-eof .caret { animation: blink 1s steps(1) infinite; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 980px) {
  .home-hero { grid-template-columns: 1fr; gap: 30px; }
  .article-wrap { grid-template-columns: 1fr; gap: 0; }
  .toc { display: none; }
  .about-page { grid-template-columns: 1fr; }
  .header-status { display: none; }
}
@media (max-width: 720px) {
  .header-inner { padding: 12px 18px; gap: 16px; flex-wrap: wrap; }
  .site-nav { margin-left: 0; gap: 18px; width: 100%; }
  .site-main { padding: 0 18px; }
  .posts-grid { grid-template-columns: 1fr; }
  .post-nav { grid-template-columns: 1fr; }
  .pn-card.next { text-align: left; }
  .md-body { font-size: 15.5px; }
}