/* ============================================================
   Dean · AI 工程化架构师 / 独立技术顾问 — 全站样式
   ============================================================ */
:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --ink: #17212e;
  --ink-2: #46536b;
  --ink-3: #78859c;
  --line: #e3e9f1;
  --blue: #185fa5;
  --blue-deep: #0c447c;
  --blue-bg: #e9f2fb;
  --teal: #0f6e56;
  --teal-bg: #e4f4ef;
  --green: #3b6d11;
  --green-bg: #edf5e4;
  --amber: #854f0b;
  --amber-bg: #fbf0dc;
  --red: #a32d2d;
  --red-bg: #fcebeb;
  --purple: #5b3aa6;
  --purple-bg: #efe9f9;
  --radius: 16px;
  --maxw: 1080px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg); color: var(--ink);
  line-height: 1.75; font-size: 15.5px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
img { max-width: 100%; }

/* ============ Nav ============ */
nav.site {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.94); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; text-decoration: none; }
.logo .mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg,#4c1d95,#a78bfa);
  color: #fff; display: inline-flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700;
}
.logo .en { color: var(--ink-3); font-weight: 500; font-size: 12px; letter-spacing: .5px; }
.nav-links { display: flex; gap: 4px; font-size: 14px; align-items: center; }
.nav-links a {
  color: var(--ink-2); text-decoration: none; padding: 7px 14px; border-radius: 9px;
  transition: background .15s ease, color .15s ease;
}
.nav-links a:hover { color: var(--blue); background: var(--blue-bg); }
.nav-links a.active { color: var(--blue); background: var(--blue-bg); font-weight: 600; }
.lang-switch {
  margin-left: 8px; padding: 4px 12px !important;
  border: 1px solid var(--line); border-radius: 14px !important;
  font-size: 12.5px; font-weight: 600; letter-spacing: .3px;
}
.lang-switch:hover { border-color: var(--blue); }
.nav-toggle {
  display: none; border: 1px solid var(--line); background: #fff; border-radius: 9px;
  width: 38px; height: 38px; cursor: pointer; font-size: 17px; color: var(--ink-2);
}
.nav-mobile {
  display: none; flex-direction: column; padding: 8px 24px 16px; gap: 2px;
  border-top: 1px solid var(--line);
}
.nav-mobile a { color: var(--ink-2); text-decoration: none; padding: 10px 12px; border-radius: 9px; }
.nav-mobile a:hover { background: var(--blue-bg); color: var(--blue); }
nav.site.open .nav-mobile { display: flex; }
@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
}

/* ============ Page hero (sub pages) ============ */
.page-hero { background: linear-gradient(135deg, #0d0824 0%, #1a1247 62%, #2a1d6b 100%); color: #fff; padding: 60px 0 66px; }
.page-hero .kicker { font-size: 13px; letter-spacing: 2px; color: rgba(255,255,255,.7); font-weight: 600; }
.page-hero h1 { font-size: 34px; font-weight: 800; margin-top: 8px; letter-spacing: .5px; }
.page-hero .sub { margin-top: 12px; font-size: 16px; color: rgba(255,255,255,.88); max-width: 680px; }
.breadcrumb { font-size: 13px; margin-top: 22px; color: rgba(255,255,255,.6); }
.breadcrumb a { color: rgba(255,255,255,.8); text-decoration: none; }
.breadcrumb a:hover { color: #fff; }

/* ============ Sections ============ */
section.block { padding: 64px 0 6px; }
.sec-head { margin-bottom: 32px; }
.sec-head .kicker { font-size: 12.5px; font-weight: 700; color: var(--blue); letter-spacing: 2px; text-transform: uppercase; }
.sec-head h2 { font-size: 27px; font-weight: 800; margin-top: 5px; letter-spacing: .3px; }
.sec-head p { color: var(--ink-2); margin-top: 8px; max-width: 660px; }

/* ============ Cards & grids ============ */
.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 22px;
}
.card h3 { font-size: 16.5px; font-weight: 700; margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--ink-2); }
.hoverable { transition: transform .18s ease, box-shadow .18s ease; }
.hoverable:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(12,68,124,.1); }

/* icon square */
.ico { width: 42px; height: 42px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 20px; margin-bottom: 14px; }
.ico-blue { background: var(--blue-bg); } .ico-teal { background: var(--teal-bg); }
.ico-green { background: var(--green-bg); } .ico-amber { background: var(--amber-bg); } .ico-red { background: var(--red-bg); }

/* tags / pills */
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tags span { font-size: 11.5px; padding: 2px 10px; border-radius: 10px; background: var(--bg); color: var(--ink-3); border: 1px solid var(--line); }
.tags span.blue { background: var(--blue-bg); color: var(--blue-deep); border-color: #c9ddf1; }
.tags span.teal { background: var(--teal-bg); color: var(--teal); border-color: #c2e5da; }
.tags span.green { background: var(--green-bg); color: var(--green); border-color: #d6e6c4; }
.tags span.amber { background: var(--amber-bg); color: var(--amber); border-color: #f0ddc0; }
.tags span.purple { background: var(--purple-bg); color: var(--purple); border-color: #ddd0f0; }
.tags span.red { background: var(--red-bg); color: var(--red); border-color: #f0c9c9; }

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 24px; border-radius: 12px; font-size: 14.5px; font-weight: 600;
  text-decoration: none; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  cursor: pointer; border: none;
}
.btn:hover { transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--blue-deep); box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.55); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.1); }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-deep); box-shadow: 0 8px 22px rgba(24,95,165,.35); }

/* ============ Home hero ============ */
header.hero {
  background:
    radial-gradient(900px 420px at 88% -10%, rgba(139,92,246,.38), transparent 60%),
    radial-gradient(600px 300px at -5% 110%, rgba(34,211,238,.18), transparent 55%),
    linear-gradient(135deg, #0d0824 0%, #1a1247 58%, #2a1d6b 100%);
  color: #fff; padding: 60px 0;
  min-height: calc(100vh - 62px);
  min-height: calc(100svh - 62px);
  display: flex; align-items: center;
  position: relative; overflow: hidden;
}
header.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(rgba(167,139,250,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(167,139,250,.06) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(900px 600px at 72% 42%, #000 0%, transparent 80%);
  mask-image: radial-gradient(900px 600px at 72% 42%, #000 0%, transparent 80%);
}
.hero-network {
  position: absolute; inset: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
  -webkit-mask-image: radial-gradient(960px 640px at 75% 45%, #000 0%, transparent 80%);
  mask-image: radial-gradient(960px 640px at 75% 45%, #000 0%, transparent 80%);
}
.hero-network .nodes circle { animation: nodePulse 4s ease-in-out infinite both; }
.hero-network .nodes circle:nth-child(4n+1) { animation-delay: 0s; }
.hero-network .nodes circle:nth-child(4n+2) { animation-delay: .8s; }
.hero-network .nodes circle:nth-child(4n+3) { animation-delay: 1.6s; }
.hero-network .nodes circle:nth-child(4n)   { animation-delay: 2.4s; }
@keyframes nodePulse {
  0%, 100% { opacity: .55; }
  50%      { opacity: 1; }
}
.hero .wrap { position: relative; z-index: 1; width: 100%; }
.hero .tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; letter-spacing: 1px;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.3);
  padding: 5px 14px; border-radius: 20px; margin-bottom: 24px;
}
.hero .tag .pulse { width: 8px; height: 8px; border-radius: 50%; background: #7ce3b1; box-shadow: 0 0 0 0 rgba(124,227,177,.7); animation: pulse 2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 9px rgba(124,227,177,0); } 100% { box-shadow: 0 0 0 0 rgba(124,227,177,0); } }
.hero h1 { font-size: 46px; font-weight: 800; line-height: 1.25; letter-spacing: .5px; }
.hero h1 .hl { color: #ffd76a; }
.hero .sub { margin-top: 18px; font-size: 17px; color: rgba(255,255,255,.9); max-width: 620px; }
.hero .ctas { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.scroll-hint {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%);
  width: 26px; height: 42px; border: 2px solid rgba(255,255,255,.45); border-radius: 14px;
  display: flex; justify-content: center; padding-top: 8px; z-index: 1;
}
.scroll-hint .bar {
  width: 3px; height: 9px; border-radius: 2px; background: rgba(255,255,255,.8);
  animation: drop 1.7s ease-out infinite;
}
@keyframes drop { 0% { transform: translateY(0); opacity: 1; } 75% { transform: translateY(14px); opacity: 0; } 100% { transform: translateY(14px); opacity: 0; } }

/* ============ Stats ============ */
.stats { padding-top: 52px; }
.stats-inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stat {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 16px; text-align: center; box-shadow: 0 12px 30px rgba(12,68,124,.08);
}
.stat .v { font-size: 26px; font-weight: 800; color: var(--blue); }
.stat .l { font-size: 12.5px; color: var(--ink-3); margin-top: 3px; }

/* ============ Case cards (home & cases) ============ */
.case-card {
  display: flex; flex-direction: column; gap: 12px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; text-decoration: none; color: var(--ink);
  position: relative; overflow: hidden;
}
.case-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; }
.case-card.c-blue::before { background: linear-gradient(90deg,#185fa5,#378add); }
.case-card.c-teal::before { background: linear-gradient(90deg,#0f6e56,#3bb593); }
.case-card.c-green::before { background: linear-gradient(90deg,#3b6d11,#79b83a); }
.case-card.c-amber::before { background: linear-gradient(90deg,#854f0b,#d99a35); }
.case-card.c-purple::before { background: linear-gradient(90deg,#3f2a78,#5b3aa6); }
.case-card.c-red::before { background: linear-gradient(90deg,#7a1f1f,#a32d2d); }
.case-card .kind { font-size: 12px; font-weight: 700; letter-spacing: 1px; }
.case-card.c-blue .kind { color: var(--blue); }
.case-card.c-teal .kind { color: var(--teal); }
.case-card.c-green .kind { color: var(--green); }
.case-card.c-amber .kind { color: var(--amber); }
.case-card.c-purple .kind { color: var(--purple); }
.case-card.c-red .kind { color: var(--red); }
.case-card h3 { font-size: 19px; font-weight: 800; }
.case-card .desc { font-size: 13.8px; color: var(--ink-2); flex: 1; }
.case-card .go {
  font-size: 13.5px; font-weight: 600; color: var(--blue);
  display: inline-flex; align-items: center; gap: 6px;
}
.case-card .go .arr { transition: transform .18s ease; display: inline-block; }
.case-card:hover .go .arr { transform: translateX(5px); }
.case-card .mini-stats { display: flex; gap: 18px; flex-wrap: wrap; }
.case-card .mini-stats .ms .n { font-size: 17px; font-weight: 800; color: var(--ink); }
.case-card .mini-stats .ms .t { font-size: 11.5px; color: var(--ink-3); }

/* ============ Filter chips ============ */
.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 26px; }
.filter {
  border: 1.5px solid var(--line); background: #fff; color: var(--ink-2);
  font-size: 13.5px; font-weight: 600; padding: 7px 18px; border-radius: 20px;
  cursor: pointer; transition: all .15s ease;
}
.filter:hover { border-color: var(--blue); color: var(--blue); }
.filter.on { background: var(--blue); border-color: var(--blue); color: #fff; }
.hidden-by-filter { display: none !important; }

/* ============ Two-column split (分栏) ============ */
.split { display: grid; grid-template-columns: 320px 1fr; gap: 22px; align-items: start; }
.side { position: sticky; top: 86px; display: flex; flex-direction: column; gap: 14px; }
.side .panel {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 20px;
}
.side .panel h4 { font-size: 13px; font-weight: 700; color: var(--ink-3); letter-spacing: 1px; margin-bottom: 10px; }
.kv { display: flex; justify-content: space-between; gap: 12px; padding: 7px 0; border-bottom: 1px dashed var(--line); font-size: 13.5px; }
.kv:last-child { border-bottom: none; }
.kv .k { color: var(--ink-3); flex-shrink: 0; }
.kv .v { font-weight: 600; text-align: right; }

/* ============ Tabs ============ */
.tabs { display: flex; gap: 6px; border-bottom: 1.5px solid var(--line); margin-bottom: 24px; flex-wrap: wrap; }
.tab {
  border: none; background: none; cursor: pointer;
  font-size: 14.5px; font-weight: 600; color: var(--ink-3);
  padding: 10px 18px; border-bottom: 2.5px solid transparent; margin-bottom: -1.5px;
  transition: color .15s ease, border-color .15s ease;
}
.tab:hover { color: var(--blue); }
.tab.on { color: var(--blue); border-bottom-color: var(--blue); }
.tab-pane { display: none; animation: fadein .35s ease; }
.tab-pane.on { display: block; }
@keyframes fadein { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ============ Numbered list ============ */
.nlist { display: flex; flex-direction: column; gap: 12px; }
.nitem {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px;
}
.nitem .n {
  flex-shrink: 0; width: 34px; height: 34px; border-radius: 10px;
  background: var(--blue); color: #fff; font-weight: 800; font-size: 14px;
  display: flex; align-items: center; justify-content: center;
}
.nitem b { font-size: 15px; display: block; }
.nitem p { font-size: 13.8px; color: var(--ink-2); margin-top: 3px; }

/* ============ Timeline ============ */
.timeline { position: relative; padding-left: 26px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.tl-item { position: relative; padding: 0 0 20px 0; }
.tl-item:last-child { padding-bottom: 0; }
.tl-dot { position: absolute; left: -24px; top: 5px; width: 12px; height: 12px; border-radius: 50%; background: var(--blue); border: 2px solid #fff; box-shadow: 0 0 0 2px var(--blue); }
.tl-dot.amber { background: var(--amber); box-shadow: 0 0 0 2px var(--amber); }
.tl-dot.green { background: var(--green); box-shadow: 0 0 0 2px var(--green); }
.tl-dot.teal { background: var(--teal); box-shadow: 0 0 0 2px var(--teal); }
.tl-title { font-weight: 700; font-size: 15px; }
.tl-body { color: var(--ink-2); font-size: 13.5px; margin-top: 4px; }

/* ============ Callout ============ */
.callout { border-left: 4px solid var(--blue); background: var(--blue-bg); border-radius: 10px; padding: 14px 18px; font-size: 14px; color: #0c447c; margin: 16px 0; }
.callout.green { border-color: var(--green); background: var(--green-bg); color: #27500a; }
.callout.amber { border-color: var(--amber); background: var(--amber-bg); color: #633806; }
.callout.red { border-color: var(--red); background: var(--red-bg); color: #791f1f; }
.callout b { font-weight: 700; }

/* ============ Big stat band (case pages) ============ */
.band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.band .cell {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 16px; text-align: center;
}
.band .cell .n { font-size: 22px; font-weight: 800; color: var(--blue); }
.band .cell .t { font-size: 12px; color: var(--ink-3); margin-top: 2px; }

/* ============ Footer ============ */
footer.site { background: #0d0824; color: rgba(255,255,255,.8); margin-top: 84px; position: relative; }
footer.site::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(139,92,246,.5) 30%, rgba(34,211,238,.35) 70%, transparent);
}
.foot-inner { display: flex; justify-content: space-between; align-items: center; padding: 38px 0; gap: 20px; flex-wrap: wrap; }
.foot-inner .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: #fff; }
.foot-inner .brand .mark { width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg,#7c3aed,#22d3ee); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; }
.foot-links { display: flex; gap: 22px; font-size: 13.5px; }
.foot-links a { color: rgba(255,255,255,.75); text-decoration: none; }
.foot-links a:hover { color: #fff; }
.foot-note { width: 100%; font-size: 12.5px; color: rgba(255,255,255,.45); padding-bottom: 26px; }
.foot-note.icp { padding-top: 2px; padding-bottom: 26px; }
.foot-note:not(.icp) { padding-bottom: 6px; }
.foot-note.icp a { color: rgba(255,255,255,.45); text-decoration: none; transition: color .2s; }
.foot-note.icp a:hover { color: rgba(255,255,255,.8); }

/* ============ Reveal animation ============ */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; } .reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; } .reveal.d4 { transition-delay: .32s; }

/* ============ Prev/next case nav ============ */
.case-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 8px; }
.case-nav a {
  display: flex; flex-direction: column; gap: 4px; text-decoration: none;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 22px; transition: transform .15s ease, box-shadow .15s ease;
}
.case-nav a:hover { transform: translateY(-3px); box-shadow: 0 12px 26px rgba(12,68,124,.1); }
.case-nav .dir { font-size: 12px; color: var(--ink-3); font-weight: 600; letter-spacing: 1px; }
.case-nav .name { font-size: 16px; font-weight: 700; color: var(--ink); }
.case-nav a.next { text-align: right; }

/* ============ Contact ============ */
.contact-box {
  background: var(--card); border: 1px solid var(--line); border-radius: 20px;
  padding: 44px 40px; text-align: center;
}
.contact-box h2 { font-size: 25px; font-weight: 800; }
.contact-box > p { color: var(--ink-2); margin-top: 12px; max-width: 560px; margin-left: auto; margin-right: auto; }
.contact-chips { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 26px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1.5px solid var(--line); border-radius: 12px; padding: 10px 20px;
  font-size: 14.5px; font-weight: 600; color: var(--ink-2); text-decoration: none;
  transition: border-color .15s ease, color .15s ease;
}
.chip:hover { border-color: var(--blue); color: var(--blue); }

/* ============ Responsive ============ */
@media (max-width: 960px) {
  .split { grid-template-columns: 1fr; }
  .side { position: static; flex-direction: row; flex-wrap: wrap; }
  .side .panel { flex: 1; min-width: 260px; }
  .g4 { grid-template-columns: 1fr 1fr; }
  .band { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 36px; }
  .page-hero h1 { font-size: 28px; }
}
@media (max-width: 600px) {
  .g3, .g2, .g4, .stats-inner, .case-nav { grid-template-columns: 1fr; }
  .side { flex-direction: column; }
  .hero h1 { font-size: 30px; }
  .contact-box { padding: 32px 22px; }
}

/* ============ Post list (articles.html) ============ */
.post-list { display: flex; flex-direction: column; gap: 14px; }
.post-item {
  display: grid; grid-template-columns: 96px 1fr auto; gap: 22px; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 28px; text-decoration: none; color: var(--ink);
  position: relative; overflow: hidden;
}
.post-item::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(180deg, #185fa5, #378add);
}
.post-item .date { font-size: 12.5px; color: var(--ink-3); font-weight: 600; letter-spacing: .3px; }
.post-item h3 { font-size: 18.5px; font-weight: 800; margin-bottom: 7px; line-height: 1.45; text-wrap: balance; }
.post-item p { font-size: 13.8px; color: var(--ink-2); }
.post-item .tags { margin-top: 11px; }
.post-item .go {
  font-size: 13.5px; font-weight: 600; color: var(--blue);
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
}
.post-item .go .arr { transition: transform .18s ease; display: inline-block; }
.post-item:hover .go .arr { transform: translateX(5px); }

/* ============ Article page ============ */
.art-head { padding: 46px 0 6px; }
.art-head .kicker { font-size: 12.5px; font-weight: 700; color: var(--blue); letter-spacing: 2px; text-transform: uppercase; }
.art-head h1 { font-size: 32px; font-weight: 800; margin-top: 11px; line-height: 1.38; letter-spacing: .3px; }
.art-meta { margin-top: 15px; display: flex; gap: 18px; flex-wrap: wrap; font-size: 13px; color: var(--ink-3); }
.art-body {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 42px 46px; margin-top: 26px;
}
.art-body .lede {
  background: var(--bg); border-radius: 12px; padding: 17px 21px;
  font-size: 14.5px; color: var(--ink-2); line-height: 1.9;
}
.art-body h2 {
  font-size: 21px; font-weight: 800; margin: 36px 0 14px;
  padding-left: 13px; border-left: 4px solid var(--blue); line-height: 1.4;
}
.art-body h2:first-of-type { margin-top: 30px; }
.art-body h3 { font-size: 16.5px; font-weight: 700; margin: 24px 0 10px; color: var(--blue-deep); }
.art-body p { margin: 15px 0; color: var(--ink-2); }
.art-body ul, .art-body ol { margin: 15px 0 15px 24px; color: var(--ink-2); }
.art-body li { margin: 8px 0; }
.art-body strong { color: var(--ink); font-weight: 700; }
.art-body code {
  background: #f1f4f9; color: var(--red); padding: 2px 6px; border-radius: 5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13.5px;
}
.art-body table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
.art-body th {
  background: #f4f7fb; text-align: left; padding: 11px 14px;
  border: 1px solid var(--line); font-weight: 700; font-size: 13.5px;
}
.art-body td { padding: 11px 14px; border: 1px solid var(--line); color: var(--ink-2); }
.art-foot {
  margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line);
  font-size: 13.5px; color: var(--ink-3);
}

@media (max-width: 700px) {
  .post-item { grid-template-columns: 1fr; gap: 12px; align-items: flex-start; }
  .post-item .date { order: -1; }
  .post-item .go { justify-self: flex-start; }
  .art-head h1 { font-size: 24px; }
  /* 窄屏隐藏标题的手动断行点，避免出现「只有几个字」的短尾行 */
  .h1-br { display: none; }
  .art-body { padding: 24px 20px; border-radius: 12px; }
  /* 表格 → 卡片式堆叠
     窄屏下横向滑动读表体验差（第 2 列被截成「与文…」很像 bug），
     改为每条记录一张卡：首列作卡头、末列作正文。本栏目表格均为 2 列，适配良好。 */
  .art-body table { display: block; margin: 18px 0; }
  .art-body thead { display: none; }
  .art-body tbody { display: block; }
  .art-body tr {
    display: block; margin-bottom: 10px; padding: 12px 14px;
    border: 1px solid var(--line); border-radius: 10px; background: var(--card);
  }
  .art-body td { display: block; padding: 0; border: 0; }
  .art-body td:first-child {
    margin-bottom: 7px; padding-bottom: 7px;
    border-bottom: 1px dashed var(--line);
    font-weight: 700; font-size: 14px; color: var(--ink);
    word-break: break-word; overflow-wrap: anywhere;
  }
  .art-body td:last-child { font-size: 13.5px; line-height: 1.65; color: var(--ink-2); }
}

/* article cover image */
.art-cover{width:100%;height:auto;display:block;border-radius:12px;margin:28px 0 8px}
@media print{.art-cover{display:none}}