@import url('https://fonts.googleapis.com/css2?family=Crimson+Text:wght@400;600;700&family=EB+Garamond:wght@400;500;600;700;800&display=swap');

:root{
  --red:#ff0000;
  --violet:#8b00ff;
  --ink:#261717;
  --line:rgba(255,255,255,.22);
  --glass:rgba(255,255,255,.12);
  --dim:rgba(255,255,255,.68);
  --serif:'EB Garamond','Crimson Text','Songti SC','Noto Serif SC',Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

*,*::before,*::after{box-sizing:border-box}

html{
  background:#261717;
  scroll-behavior:smooth;
  scroll-padding-top:84px;
  overflow-x:clip;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  background:transparent;
  color:rgba(255,255,255,.9);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  overflow-x:clip;
  min-height:100vh;
}

a{color:inherit}
img{max-width:100%}

:focus-visible{outline:2px solid #ff9db0;outline-offset:3px;border-radius:6px}

/* 背景光层 */
.backdrop{
  position:fixed;
  inset:0;
  z-index:-1;
  overflow:hidden;
  background:
    radial-gradient(58% 48% at 84% 6%,rgba(255,0,0,.62),transparent 70%),
    radial-gradient(52% 52% at 10% 22%,rgba(139,0,255,.62),transparent 72%),
    radial-gradient(70% 58% at 50% 106%,rgba(255,0,0,.34),transparent 70%),
    linear-gradient(160deg,#3d0e1c,#261717 56%,#1a0a20);
}
.backdrop span{
  position:absolute;
  border-radius:50%;
  filter:blur(70px);
  opacity:.5;
  mix-blend-mode:screen;
  animation:drift 24s ease-in-out infinite alternate;
}
.backdrop span:nth-child(1){width:44vw;height:44vw;left:-10vw;top:4vh;background:var(--violet)}
.backdrop span:nth-child(2){width:38vw;height:38vw;right:-8vw;top:36vh;background:var(--red);animation-delay:-7s}
.backdrop span:nth-child(3){width:30vw;height:30vw;left:36vw;bottom:-8vh;background:#ff3b6b;animation-delay:-13s}
@keyframes drift{
  from{transform:translate3d(0,0,0) scale(1)}
  to{transform:translate3d(4vw,-4vh,0) scale(1.18)}
}

/* 顶部细条 */
.ticker{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,rgba(255,0,0,.28),rgba(139,0,255,.28));
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.ticker-track{
  display:flex;
  gap:60px;
  padding:7px 0;
  white-space:nowrap;
  font-size:16px;
  letter-spacing:.2em;
  color:rgba(255,255,255,.8);
  animation:slide 30s linear infinite;
  width:max-content;
}
.ticker-track span{display:block}
@keyframes slide{
  from{transform:translateX(0)}
  to{transform:translateX(calc(-50% - 30px))}
}

/* 顶部导航 */
.top{
  position:sticky;
  top:0;
  z-index:40;
  background:rgba(38,23,23,.42);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.nav{max-width:100%;overflow:hidden}
.nav ol{
  display:flex;
  align-items:center;
  gap:8px;
  margin:0;
  padding:9px 14px;
  list-style:none;
  max-width:100%;
  overflow-x:auto;
  overscroll-behavior-x:contain;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none;
}
.nav ol::-webkit-scrollbar{display:none}
.nav li{flex:0 0 auto}
.nav a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 15px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.07);
  text-decoration:none;
  font-size:16px;
  white-space:nowrap;
  transition:background .25s ease,border-color .25s ease;
}
.nav a:hover,.nav a.on{
  background:rgba(255,255,255,.22);
  border-color:rgba(255,255,255,.5);
}
.brand-li{margin-left:auto;margin-right:auto}
.brand a{
  gap:8px;
  font-family:var(--serif);
  font-size:19px;
  letter-spacing:.14em;
  background:linear-gradient(120deg,rgba(255,0,0,.55),rgba(139,0,255,.55));
  border-color:rgba(255,255,255,.42);
}
.logo-mark{width:24px;height:24px;border-radius:6px;display:block}

/* 主体栅格 */
main{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:26px;
  max-width:1200px;
  margin:0 auto;
  padding:24px 20px 64px;
  align-items:start;
  overflow-x:clip;
}
main > div{min-width:0}

/* 首屏 */
.hero{
  position:relative;
  min-height:100vh;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:26px;
  align-items:center;
  padding:32px 0 56px;
  scroll-margin-top:96px;
}
.hero::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:8%;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--red),var(--violet),transparent);
  transform:skewY(-3deg);
  opacity:.75;
  pointer-events:none;
}
.hero-media{position:relative;z-index:1;min-width:0}
.hero-img{
  display:block;
  width:100%;
  height:clamp(260px,62vh,560px);
  object-fit:cover;
  border-radius:10px;
  border:1px solid var(--line);
}
.hero-fallback{
  height:clamp(260px,62vh,560px);
  border-radius:10px;
  border:1px solid rgba(255,255,255,.3);
  background:
    radial-gradient(60% 60% at 30% 25%,rgba(255,255,255,.35),transparent 65%),
    linear-gradient(135deg,rgba(255,0,0,.62),rgba(139,0,255,.62));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}
.hero-text{text-align:right;position:relative;z-index:1;min-width:0}
.hero-text h1{
  font-family:var(--serif);
  font-size:clamp(2rem,4.5vw,3.4rem);
  line-height:1.16;
  letter-spacing:.01em;
  margin:.1em 0 .45em;
  color:#fff;
  overflow-wrap:break-word;
}
.hero-lead{
  margin:0 0 22px auto;
  max-width:32ch;
  font-size:17px;
  color:var(--dim);
}
.hero-cta{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:0 22px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.45);
  background:linear-gradient(120deg,rgba(255,0,0,.72),rgba(139,0,255,.72));
  color:#fff;
  text-decoration:none;
  font-size:16px;
  letter-spacing:.06em;
}
.hero-cta:hover{filter:brightness(1.12)}

/* 正文 */
.prose{padding:6px;min-width:0}
.prose > section{
  margin:0 0 20px;
  padding:30px 28px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(15px);
  backdrop-filter:blur(15px);
  scroll-margin-top:96px;
}
.prose > section:last-child{margin-bottom:0}
.prose small{
  display:block;
  font-family:var(--serif);
  font-size:16px;
  letter-spacing:.24em;
  color:rgba(255,255,255,.6);
  margin:0 0 .3em;
}
.prose h2{
  font-family:var(--serif);
  font-size:clamp(1.35rem,2.6vw,1.85rem);
  line-height:1.32;
  color:#fff;
  margin:.05em 0 .6em;
}
.prose h3{
  font-family:var(--serif);
  font-size:1.22rem;
  line-height:1.4;
  color:#fff;
  margin:1.3em 0 .5em;
}
.prose p{margin:0 0 1em}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1em}
.prose li{margin:.35em 0}
.prose strong{color:#fff}
.prose a{color:#ffd2d2;text-decoration:underline;text-underline-offset:3px}
.prose blockquote{
  margin:1em 0;
  padding:.6em 1em;
  border-left:3px solid var(--red);
  background:rgba(255,255,255,.08);
  border-radius:0 8px 8px 0;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:8px;border:1px solid var(--line);height:auto}
.prose table{width:100%;border-collapse:collapse;font-size:16px;margin:0 0 1em}
.prose th,.prose td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.prose th{background:rgba(255,255,255,.1);color:#fff}
.prose hr{border:0;border-top:1px solid var(--line);margin:1.4em 0}

/* 侧栏 */
.toc{
  position:sticky;
  top:84px;
  padding:18px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(15px);
  backdrop-filter:blur(15px);
}
.toc small{
  display:block;
  font-family:var(--serif);
  font-size:16px;
  letter-spacing:.24em;
  color:rgba(255,255,255,.6);
  margin:0 0 .2em;
}
.toc h2{font-family:var(--serif);font-size:1.3rem;margin:0 0 .7em;color:#fff}
.toc ol{list-style:none;margin:0;padding:0}
.toc li + li{border-top:1px solid rgba(255,255,255,.1)}
.toc a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:0 8px;
  border-radius:8px;
  text-decoration:none;
  font-size:16px;
  color:rgba(255,255,255,.82);
}
.toc a span{
  font-family:var(--serif);
  font-size:16px;
  color:#ffb4b4;
  letter-spacing:.08em;
}
.toc a:hover{background:rgba(255,255,255,.14);color:#fff}

/* 页脚 */
footer{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,.68fr));
  gap:24px;
  padding:46px max(20px,calc(50vw - 580px)) 18px;
  border-top:1px solid var(--line);
  background:rgba(18,10,14,.55);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  overflow-x:clip;
}
.f-brand{min-width:0}
.f-logo{
  font-family:var(--serif);
  font-size:clamp(2.3rem,7vw,4.6rem);
  line-height:1.04;
  letter-spacing:.02em;
  color:#fff;
  margin:0 0 12px;
  overflow-wrap:break-word;
}
.f-desc{margin:0;max-width:34ch;font-size:16px;color:var(--dim)}
footer dl{margin:0;min-width:0}
footer dt{
  font-family:var(--serif);
  font-size:16px;
  letter-spacing:.2em;
  color:rgba(255,255,255,.62);
  margin-bottom:8px;
}
footer dd{margin:0;font-size:16px;color:rgba(255,255,255,.82);overflow-wrap:break-word;word-break:break-word}
footer dd a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  text-decoration:none;
}
footer dd a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.f-bottom{
  grid-column:1/-1;
  margin-top:18px;
  padding-top:14px;
  border-top:1px solid rgba(255,255,255,.14);
  text-align:center;
  font-size:16px;
  color:rgba(255,255,255,.58);
}
.f-bottom p{margin:2px 0;overflow-wrap:break-word}

/* 回到顶部 */
.to-top{
  position:fixed;
  right:16px;
  bottom:16px;
  z-index:60;
  min-height:46px;
  padding:0 18px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(38,23,23,.66);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  color:#fff;
  font-family:var(--sans);
  font-size:16px;
  cursor:pointer;
  opacity:0;
  pointer-events:none;
  transition:opacity .3s ease;
}
.to-top.on{opacity:1;pointer-events:auto}

/* 入场 */
html.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
html.js .reveal.in{opacity:1;transform:none}
html.js .prose > section:nth-child(2){transition-delay:.05s}
html.js .prose > section:nth-child(3){transition-delay:.1s}
html.js .prose > section:nth-child(4){transition-delay:.15s}
html.js .prose > section:nth-child(5){transition-delay:.2s}
html.js .prose > section:nth-child(6){transition-delay:.25s}
html.js .prose > section:nth-child(7){transition-delay:.3s}

/* 平板与手机 */
@media (max-width:960px){
  main{grid-template-columns:minmax(0,1fr);padding:16px 14px 52px;gap:20px}
  .hero{grid-template-columns:1fr;min-height:0;padding:16px 0 34px;gap:18px}
  .hero::after{bottom:2%}
  .hero-text{text-align:left}
  .hero-lead{margin-left:0;max-width:44ch}
  .hero-img,.hero-fallback{height:min(46vh,380px)}
  .toc{position:static}
  .prose > section{padding:26px 20px}
  footer{grid-template-columns:1fr 1fr;padding:36px 18px 16px}
  .f-brand{grid-column:1/-1}
}

@media (max-width:560px){
  body{font-size:17px}
  .nav a{padding:0 12px;font-size:16px}
  .brand a{font-size:18px}
  .prose{padding:0}
  .prose > section{padding:22px 16px}
  .hero-img,.hero-fallback{height:40vh}
  footer{grid-template-columns:1fr;padding:30px 16px 14px}
  .f-logo{font-size:2.4rem}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .ticker-track{animation:none;justify-content:center;width:auto;gap:0;overflow:hidden}
  .ticker-track span:last-child{display:none}
  .backdrop span{animation:none}
  html.js .reveal{opacity:1;transform:none;transition:none}
}

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