@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:#261717;
  --red:#ff0000;
  --violet:#8b00ff;
  --fg:#f8efef;
  --dim:rgba(248,239,239,.72);
  --glass:rgba(255,255,255,.12);
  --line:rgba(255,255,255,.2);
  --edge:clamp(1rem,4vw,2.75rem);
}

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

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  font-family:'Inter','Helvetica Neue',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.75;
  color:var(--fg);
  background:var(--ink);
  padding-bottom:124px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

body::before{
  content:"";
  position:fixed;
  inset:-12%;
  z-index:-2;
  pointer-events:none;
  background:
    radial-gradient(50vw 46vw at 78% 2%, rgba(255,0,0,.58), rgba(255,0,0,0) 62%),
    radial-gradient(54vw 50vw at 6% 26%, rgba(139,0,255,.48), rgba(139,0,255,0) 64%),
    radial-gradient(64vw 52vw at 52% 96%, rgba(255,0,0,.26), rgba(255,0,0,0) 70%),
    #261717;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.24) 1px, rgba(255,255,255,0) 1px);
  background-size:24px 24px;
  -webkit-mask-image:linear-gradient(180deg,#000,rgba(0,0,0,.5) 62%,rgba(0,0,0,.85));
  mask-image:linear-gradient(180deg,#000,rgba(0,0,0,.5) 62%,rgba(0,0,0,.85));
}

a{color:inherit}

:focus-visible{outline:2px solid var(--red);outline-offset:3px}

/* ---------- 底部固定条 ---------- */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  display:flex;
  flex-direction:column;
  gap:.35rem;
  padding:.55rem var(--edge) calc(.55rem + env(safe-area-inset-bottom));
  background:rgba(20,11,11,.62);
  border-top:1px solid var(--line);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
}

.dock-brand{
  margin:0;
  font-family:'Space Grotesk','Inter',sans-serif;
  font-weight:700;
  font-size:.95rem;
  letter-spacing:.26em;
  color:#ffdcdc;
}

.burger{
  align-self:flex-end;
  width:56px;
  height:44px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:6px;
  padding:0;
  border:1px solid var(--line);
  border-radius:0;
  background:rgba(255,255,255,.14);
  color:var(--fg);
  cursor:pointer;
  transition:background .25s ease;
}

.burger:hover{background:rgba(255,0,0,.38)}

.burger-bar{
  display:block;
  width:22px;
  height:2px;
  background:var(--fg);
  transition:transform .3s ease;
}

.dock.open .burger-bar:nth-child(1){transform:translateY(4px) rotate(45deg)}
.dock.open .burger-bar:nth-child(2){transform:translateY(-4px) rotate(-45deg)}

.dock-nav{
  position:fixed;
  inset:0;
  z-index:55;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:3rem var(--edge) 7rem;
  background:rgba(16,8,8,.84);
  -webkit-backdrop-filter:blur(20px);
  backdrop-filter:blur(20px);
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transition:opacity .3s ease,visibility .3s ease;
}

.dock.open .dock-nav{
  opacity:1;
  visibility:visible;
  pointer-events:auto;
}

.dock-list{
  list-style:none;
  margin:0;
  padding:0;
  max-height:100%;
  overflow:auto;
  text-align:center;
}

.dock-list a{
  display:block;
  min-height:48px;
  padding:.62rem 1.4rem;
  text-decoration:none;
  font-family:'Space Grotesk','Inter',sans-serif;
  font-size:clamp(1.05rem,3.2vw,1.35rem);
  letter-spacing:.06em;
  color:var(--fg);
  border-bottom:1px solid rgba(255,255,255,.09);
  transition:color .2s ease,transform .2s ease;
}

.dock-list a:hover{color:var(--red);transform:translateX(5px)}

/* ---------- 首屏 ---------- */
main{display:block}

.hero{
  position:relative;
  min-height:100vh;
  min-height:100svh;
  display:grid;
  grid-template-rows:auto 1fr;
  gap:clamp(1rem,3vw,2rem);
  padding:clamp(2rem,8vw,4.5rem) var(--edge) 0;
}

.hero-copy{
  margin-left:auto;
  max-width:min(46rem,100%);
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:.5rem;
  text-align:right;
}

.hero-h1{
  margin:0;
  font-family:'Space Grotesk','Inter',sans-serif;
  font-weight:700;
  font-size:clamp(2rem,7.6vw,4.4rem);
  line-height:1.12;
  letter-spacing:-.02em;
  text-shadow:0 0 34px rgba(255,0,0,.45);
}

.hero-h2{
  margin:0;
  font-family:'JetBrains Mono',ui-monospace,monospace;
  font-weight:500;
  font-size:clamp(.82rem,2.4vw,1rem);
  line-height:1.6;
  letter-spacing:.3em;
  color:#ffb6b6;
}

.subtitle{
  margin:0;
  max-width:36rem;
  font-size:1rem;
  line-height:1.75;
  color:var(--dim);
}

.hero-jump{margin:.5rem 0 0}

.hero-jump a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.55rem 1.3rem;
  background:var(--red);
  color:#fff;
  font-size:.95rem;
  font-weight:600;
  letter-spacing:.1em;
  text-decoration:none;
  transition:transform .25s ease,box-shadow .25s ease;
}

.hero-jump a:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 28px rgba(255,0,0,.5);
}

.hero-art{
  position:relative;
  margin:0;
  min-height:36vh;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:0;
  background:linear-gradient(152deg,rgba(139,0,255,.55),rgba(255,0,0,.42) 55%,rgba(38,23,23,.92));
  -webkit-backdrop-filter:blur(15px);
  backdrop-filter:blur(15px);
}

.art-glow{
  position:absolute;
  left:-10%;
  right:-10%;
  bottom:-40%;
  height:75%;
  z-index:0;
  background:radial-gradient(50% 100% at 50% 100%,rgba(255,0,0,.9),rgba(255,0,0,0) 70%);
  filter:blur(8px);
}

.hero-art img{
  position:absolute;
  inset:0;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  opacity:.9;
}

/* ---------- 正文 + 侧栏 ---------- */
.content-shell{
  max-width:1180px;
  margin:0 auto;
  padding:clamp(1.5rem,5vw,3rem) var(--edge) clamp(2rem,6vw,3.5rem);
  display:grid;
  grid-template-columns:minmax(0,1fr) 278px;
  gap:clamp(1.2rem,3vw,2.4rem);
  align-items:start;
}

.content-main{min-width:0}

main div[id]{scroll-margin-top:1.5rem}

.content-main > div{
  background:rgba(32,19,19,.82);
  border:0;
  border-radius:0;
  padding:clamp(1.1rem,3.2vw,2rem);
  margin:0 0 1.15rem;
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:background .3s ease;
}

.content-main > div:hover{background:rgba(48,27,27,.9)}

.content-main > div:last-child{margin-bottom:0}

.content-main h2{
  margin:0 0 .75rem;
  font-family:'Space Grotesk','Inter',sans-serif;
  font-size:clamp(1.3rem,3.6vw,1.9rem);
  line-height:1.3;
  letter-spacing:.01em;
  color:#fff;
}

.content-main h3{
  margin:1.6rem 0 .5rem;
  font-size:1.14rem;
  line-height:1.4;
  color:#ffd3d3;
}

.content-main h4{
  margin:1.2rem 0 .4rem;
  font-size:1rem;
  line-height:1.5;
  color:#ffd3d3;
}

.content-main p{
  margin:0 0 1rem;
  line-height:1.85;
  overflow-wrap:anywhere;
}

.content-main p:last-child{margin-bottom:0}

.content-main ul,
.content-main ol{
  margin:0 0 1rem;
  padding-left:1.25rem;
}

.content-main li{margin:.35rem 0;line-height:1.8}

.content-main a{color:#ff8f8f;text-underline-offset:3px}
.content-main a:hover{color:var(--red)}
.content-main strong{color:#fff;font-weight:600}

.content-main figure{margin:1.1rem 0}
.content-main img{max-width:100%;height:auto;display:block}
.content-main figcaption{font-size:.9rem;color:var(--dim);margin-top:.4rem}

.content-main blockquote{
  margin:1.1rem 0;
  padding:.7rem 1rem;
  background:rgba(139,0,255,.18);
  border-left:3px solid var(--violet);
  color:#f3e6ff;
}

.content-main blockquote p:last-child{margin-bottom:0}

.content-main table{
  display:block;
  width:100%;
  overflow-x:auto;
  border-collapse:collapse;
  font-size:.95rem;
}

.content-main th,
.content-main td{
  padding:.55rem .7rem;
  border-bottom:1px solid rgba(255,255,255,.14);
  text-align:left;
  white-space:nowrap;
}

.content-main th{color:#ffc9c9;font-weight:600}

.content-main hr{
  border:0;
  border-top:1px solid rgba(255,255,255,.14);
  margin:1.4rem 0;
}

.content-main code{
  font-family:'JetBrains Mono',ui-monospace,monospace;
  font-size:.9em;
  background:rgba(255,255,255,.12);
  padding:.1em .35em;
}

/* ---------- 右侧栏 ---------- */
.rail{
  position:sticky;
  top:1.25rem;
  padding:1.05rem 1.1rem 1.2rem;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:0;
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
}

.rail-h2{
  margin:0 0 .6rem;
  font-family:'JetBrains Mono',ui-monospace,monospace;
  font-size:.82rem;
  font-weight:500;
  letter-spacing:.26em;
  color:#ffc0c0;
}

.rail-list{list-style:none;margin:0;padding:0}

.rail-list a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:.4rem 0;
  font-size:.95rem;
  line-height:1.4;
  text-decoration:none;
  color:var(--fg);
  border-bottom:1px solid rgba(255,255,255,.09);
  transition:color .2s ease,padding-left .2s ease;
}

.rail-list li:last-child a{border-bottom:0}

.rail-list a:hover{color:var(--red);padding-left:.35rem}

/* ---------- 页脚 ---------- */
.foot{
  max-width:1180px;
  margin:0 auto;
  padding:2rem var(--edge) 2.5rem;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  gap:1rem;
  align-items:center;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:.95rem;
}

.foot p{margin:0;line-height:1.6}

.foot-brand{
  font-family:'Space Grotesk','Inter',sans-serif;
  font-weight:700;
  letter-spacing:.22em;
  color:#ffdcdc;
}

.foot-copy{
  font-size:.92rem;
  color:var(--dim);
  text-align:center;
}

.foot-links{
  display:flex;
  justify-content:flex-end;
  gap:1.1rem;
  flex-wrap:wrap;
}

.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  text-decoration:none;
  color:var(--dim);
  transition:color .2s ease;
}

.foot-links a:hover{color:var(--red)}

/* ---------- 动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .65s ease,transform .65s ease;
}

.reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .hero-jump a,.dock-list a,.rail-list a,.content-main > div{transition:none}
}

/* ---------- 断点 ---------- */
@media (max-width:900px){
  .content-shell{grid-template-columns:minmax(0,1fr)}
  .rail{position:static;order:2}
}

@media (max-width:600px){
  body{font-size:16px;padding-bottom:132px}
  .hero{min-height:100svh;padding-top:env(safe-area-inset-top)}
  .hero-art{min-height:30vh}
  .foot{
    grid-template-columns:1fr;
    gap:.55rem;
    text-align:center;
  }
  .foot-links{justify-content:center}
  .foot-links a{min-height:44px}
  .content-main > div{padding:1rem .95rem}
}

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