@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&family=Space+Grotesk:wght@500;600;700&display=swap');

:root{
  --ink:#26171a;
  --ink-2:#2e1c20;
  --surface:#3a2529;
  --surface-2:#452d32;
  --rose:#eb879c;
  --rose-soft:#ffb6c1;
  --text:#f7ebee;
  --muted:#d4b8be;
  --line:rgba(255,182,193,.16);
  --r:28px;
  --soft:0 2px 4px rgba(0,0,0,.32), 0 12px 28px rgba(0,0,0,.26), inset 0 1px 0 rgba(255,255,255,.045);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
}
h1,h2,h3,h4{
  margin:0 0 .5em;
  font-family:"Space Grotesk",Inter,"PingFang SC",sans-serif;
  font-weight:600;
  line-height:1.3;
  letter-spacing:-.02em;
}
p{margin:0 0 1em}
a{color:var(--rose-soft);text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul,ol{padding-left:1.3em}
:focus-visible{outline:3px solid var(--rose-soft);outline-offset:3px;border-radius:8px}

/* ---------- 顶部两行导航 ---------- */
.site-head{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(38,23,26,.95);
  backdrop-filter:blur(16px) saturate(1.15);
  -webkit-backdrop-filter:blur(16px) saturate(1.15);
  border-bottom:1px solid var(--line);
}
.head-brand{
  max-width:1180px;
  margin:0 auto;
  padding:12px clamp(16px,4vw,40px) 2px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-height:44px;
  color:var(--text);
  font-family:"Space Grotesk",Inter,sans-serif;
  font-size:20px;
  font-weight:600;
  letter-spacing:-.02em;
}
.logo{
  width:36px;
  height:36px;
  flex:none;
  display:grid;
  place-items:center;
  border-radius:12px;
  background:linear-gradient(145deg,var(--rose-soft),#c9647a);
  color:#2a1418;
  font-size:17px;
  font-weight:700;
  box-shadow:0 4px 14px rgba(235,135,156,.34);
}
.logo-img{
  width:36px;
  height:36px;
  flex:none;
  border-radius:12px;
  object-fit:cover;
  box-shadow:0 4px 14px rgba(235,135,156,.28);
}
.head-menu{
  max-width:1180px;
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:10px;
  padding:0 clamp(16px,4vw,40px) 10px;
}
.mainnav{
  flex:1 1 auto;
  min-width:0;
  display:flex;
  gap:4px;
  overflow-x:auto;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.mainnav::-webkit-scrollbar{display:none}
.mainnav a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  border-radius:14px;
  color:var(--muted);
  font-size:16px;
  white-space:nowrap;
  transition:background .24s var(--ease),color .24s var(--ease),transform .24s var(--ease);
}
.mainnav a:hover{background:var(--surface);color:var(--text);transform:translateY(-1px)}
.mainnav a.active{background:var(--rose);color:#2a1418;font-weight:600}
.cta{
  flex:none;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 18px;
  border-radius:999px;
  background:linear-gradient(135deg,var(--rose-soft),var(--rose));
  color:#2a1418;
  font-size:16px;
  font-weight:600;
  box-shadow:0 6px 18px rgba(235,135,156,.3);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.cta:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(235,135,156,.42)}

/* ---------- 版心 ---------- */
.layout{
  display:grid;
  grid-template-columns:264px minmax(0,1fr);
  gap:clamp(20px,3vw,40px);
  align-items:start;
  max-width:1180px;
  margin:0 auto;
  padding:0 clamp(16px,4vw,40px) clamp(48px,7vw,84px);
}

/* ---------- 首屏 ---------- */
.hero{
  grid-column:1 / -1;
  grid-row:1;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:clamp(24px,4vw,56px);
  align-items:center;
  min-height:clamp(520px,calc(100vh - 118px),860px);
  padding:clamp(28px,5vw,64px) 0;
}
.hero.solo{grid-template-columns:minmax(0,1fr)}
.hero-copy{text-align:center}
.hero h1{
  font-size:clamp(30px,5.4vw,54px);
  margin-bottom:26px;
  text-wrap:balance;
}
.hero-cta{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:0 26px;
  border-radius:999px;
  background:linear-gradient(135deg,var(--rose-soft),var(--rose));
  color:#2a1418;
  font-weight:600;
  font-size:17px;
  box-shadow:0 10px 28px rgba(235,135,156,.32);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.hero-cta:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(235,135,156,.44)}
.hero-fig{margin:0}
.hero-img{
  width:100%;
  aspect-ratio:4 / 3;
  object-fit:cover;
  border-radius:var(--r);
  box-shadow:var(--soft);
}

/* ---------- 左侧边栏 ---------- */
.rail{
  grid-column:1;
  grid-row:2;
  position:sticky;
  top:132px;
}
.rail-box{
  background:var(--ink-2);
  border-radius:var(--r);
  padding:22px 18px;
  box-shadow:var(--soft);
}
.rail-h{
  font-size:18px;
  color:var(--rose-soft);
  margin-bottom:8px;
}
.rail-box .subtitle{
  font-size:15px;
  line-height:1.65;
  color:var(--muted);
  margin-bottom:16px;
}
.rail-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:2px;
}
.rail-list a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:0 12px;
  border-radius:14px;
  color:var(--text);
  font-size:16px;
  transition:background .22s var(--ease),color .22s var(--ease),padding-left .22s var(--ease);
}
.rail-list a:hover{background:var(--surface);color:var(--rose-soft);padding-left:16px}

/* ---------- 正文 ---------- */
.essay{
  grid-column:2;
  grid-row:2;
  min-width:0;
}
.essay > article{
  background:var(--surface);
  border-radius:var(--r);
  padding:clamp(22px,3.2vw,40px);
  margin-bottom:clamp(16px,2.4vw,26px);
  box-shadow:var(--soft);
  scroll-margin-top:136px;
  transition:transform .26s var(--ease),box-shadow .26s var(--ease);
}
.essay > article:hover{
  transform:translateY(-2px);
  box-shadow:0 4px 10px rgba(0,0,0,.32),0 20px 44px rgba(0,0,0,.36);
}
.essay > article > :last-child{margin-bottom:0}
.essay h2{
  font-size:clamp(22px,2.6vw,30px);
  color:var(--rose-soft);
}
.essay h3{
  font-size:clamp(18px,2vw,22px);
  color:var(--text);
  margin-top:1.4em;
}
.essay h2 + .subtitle,
.essay h2 + .subhead,
.essay h2 + .lead,
.essay h2 + .desc{
  margin-top:-.2em;
  color:var(--muted);
  font-size:16px;
}
.essay li{margin-bottom:.45em}
.essay li::marker{color:var(--rose)}
.essay strong{color:#fff}
.essay a{text-decoration:underline;text-underline-offset:3px}
.essay blockquote{
  margin:0 0 1em;
  padding:16px 20px;
  background:var(--surface-2);
  border-radius:20px;
}
.essay table{
  width:100%;
  border-collapse:collapse;
  font-size:16px;
  margin-bottom:1em;
}
.essay th,.essay td{
  text-align:left;
  padding:10px 12px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
.essay th{color:var(--rose-soft);font-weight:600}
.essay code,.essay pre{
  font-family:"JetBrains Mono",ui-monospace,monospace;
  font-size:15px;
}
.essay pre{
  overflow-x:auto;
  padding:16px;
  border-radius:18px;
  background:var(--ink-2);
}
.essay hr{
  border:0;
  height:1px;
  background:var(--line);
  margin:1.6em 0;
}

/* ---------- 页脚 ---------- */
.site-foot{
  background:var(--ink-2);
  border-top:1px solid var(--line);
  padding:clamp(26px,4vw,42px) clamp(16px,4vw,40px);
}
.foot-wrap{
  max-width:1180px;
  margin:0 auto;
  display:grid;
  grid-template-columns:auto minmax(140px,1fr) minmax(0,2.4fr) auto;
  gap:clamp(14px,3vw,32px);
  align-items:start;
}
.foot-logo a{display:inline-flex;align-items:center;min-height:44px}
.foot-name p{
  margin:0;
  font-family:"Space Grotesk",Inter,sans-serif;
  font-size:16px;
  font-weight:600;
  padding-top:10px;
}
.foot-nav dl{
  margin:0;
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:2px 4px;
}
.foot-nav dt{
  color:var(--rose);
  font-size:16px;
  margin-right:4px;
}
.foot-nav dd{margin:0}
.foot-nav a,.to-top{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 10px;
  border-radius:12px;
  font-size:16px;
  color:var(--muted);
  transition:background .22s var(--ease),color .22s var(--ease);
}
.foot-nav a:hover{background:var(--surface);color:var(--text)}
.foot-end{text-align:right}
.to-top{
  background:var(--surface);
  color:var(--text);
  padding:0 14px;
  border-radius:999px;
  margin-bottom:8px;
}
.to-top:hover{background:var(--rose);color:#2a1418}
.copy{
  margin:0;
  font-size:16px;
  color:var(--muted);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(18px)}
.reveal.in{
  opacity:1;
  transform:none;
  transition:opacity .34s var(--ease),transform .34s var(--ease);
}

/* ---------- 断点 ---------- */
@media (max-width:900px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .hero{
    grid-template-columns:minmax(0,1fr);
    min-height:auto;
    padding:32px 0 8px;
  }
  .hero-fig{margin-top:8px}
  .hero h1{font-size:clamp(28px,7vw,40px)}
  .rail{grid-column:1;grid-row:auto;position:static;margin-bottom:20px}
  .rail-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .essay{grid-column:1;grid-row:auto}
  .essay > article{scroll-margin-top:150px}
}

@media (max-width:760px){
  .foot-wrap{grid-template-columns:1fr;gap:14px}
  .foot-end{text-align:left}
  .foot-name p{padding-top:0}
}

@media (max-width:600px){
  body{font-size:16px}
  .brand{font-size:18px}
  .mainnav a{padding:0 12px}
  .cta{padding:0 14px;font-size:15px}
  .rail-list{grid-template-columns:minmax(0,1fr)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001s!important;
    transition-duration:.001s!important;
  }
  .reveal{opacity:1;transform:none}
}

button[aria-expanded]{min-width:44px;min-height:44px}