@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;500;600;700&family=Josefin+Sans:wght@300;400;500;600;700&display=swap');

:root{
  --red:#ff0000;
  --violet:#8b00ff;
  --ink:#261717;
  --paper:rgba(255,255,255,.075);
  --paper-2:rgba(255,255,255,.12);
  --line:rgba(255,255,255,.18);
  --line-soft:rgba(255,255,255,.1);
  --text:#f4ebee;
  --text-dim:#dcc9d0;
  --text-mute:#b39aa3;
  --radius:28px;
}

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

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

body{
  margin:0;
  min-height:100vh;
  font-family:'Josefin Sans','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  font-size:17px;
  line-height:1.78;
  color:var(--text);
  background:
    radial-gradient(1100px 720px at 10% -12%, rgba(255,0,0,.30), transparent 62%),
    radial-gradient(900px 640px at 94% 2%, rgba(139,0,255,.34), transparent 60%),
    radial-gradient(1200px 900px at 48% 110%, rgba(139,0,255,.18), transparent 72%),
    #0d0709;
  background-attachment:fixed;
  overflow-x:hidden;
}

img{max-width:100%;height:auto}
a{color:#ff97a2}

:focus-visible{
  outline:2px solid rgba(255,255,255,.85);
  outline-offset:3px;
}

/* ---- 光晕底层 ---- */
.glowfield{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  overflow:hidden;
}
.glowfield span{
  position:absolute;
  display:block;
  border-radius:50%;
  filter:blur(70px);
  opacity:.55;
  will-change:transform;
}
.glowfield span:nth-child(1){
  width:46vw;height:46vw;left:-10vw;top:-14vw;
  background:radial-gradient(circle at 40% 40%, var(--red), transparent 70%);
}
.glowfield span:nth-child(2){
  width:42vw;height:42vw;right:-8vw;top:6vh;
  background:radial-gradient(circle at 50% 50%, var(--violet), transparent 70%);
}
.glowfield span:nth-child(3){
  width:54vw;height:54vw;left:22vw;bottom:-22vw;
  background:radial-gradient(circle at 50% 50%, var(--violet), transparent 74%);
}

/* ---- 顶栏：品牌居中，菜单分列两侧 ---- */
.topbar{
  position:sticky;
  top:0;
  z-index:40;
  background:rgba(30,17,20,.6);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
  box-shadow:0 18px 44px rgba(0,0,0,.38);
}
.bar{
  max-width:1180px;
  margin:0 auto;
  padding:9px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.bar-nav ul{
  list-style:none;
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
}
.bar-nav a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 11px;
  border-radius:12px;
  border:1px solid transparent;
  font-size:16px;
  letter-spacing:.04em;
  color:var(--text-dim);
  text-decoration:none;
  white-space:nowrap;
  transition:background .25s ease, color .25s ease, border-color .25s ease;
}
.bar-nav a:hover{
  color:#fff;
  background:rgba(255,255,255,.11);
  border-color:rgba(255,255,255,.2);
}
.brand{
  font-family:'Cinzel','Josefin Sans',serif;
  font-size:19px;
  font-weight:600;
  letter-spacing:.22em;
  color:#fff;
  text-decoration:none;
  white-space:nowrap;
  text-shadow:0 0 22px rgba(255,0,0,.6),0 0 40px rgba(139,0,255,.35);
}
.bar-side{
  display:flex;
  align-items:center;
  gap:8px;
}
.cta{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 18px;
  border-radius:999px;
  font-size:16px;
  font-weight:600;
  letter-spacing:.16em;
  color:#fff;
  text-decoration:none;
  white-space:nowrap;
  background:linear-gradient(120deg,var(--red),var(--violet));
  border:1px solid rgba(255,255,255,.32);
  box-shadow:0 12px 28px rgba(255,0,0,.26),inset 0 1px 0 rgba(255,255,255,.35);
  transition:transform .25s ease, box-shadow .25s ease;
}
.cta:hover{
  transform:translateY(-1px);
  box-shadow:0 16px 34px rgba(139,0,255,.34),inset 0 1px 0 rgba(255,255,255,.45);
}

/* ---- 主体：左侧粘性锚点条 + 右侧磨砂正文 ---- */
main{position:relative;z-index:1}

.wrap{
  max-width:1180px;
  margin:0 auto;
  padding:28px 20px 64px;
  display:grid;
  grid-template-columns:238px minmax(0,1fr);
  gap:30px;
  align-items:start;
}

.rail{
  position:sticky;
  top:92px;
  padding:20px 16px 18px;
  border-radius:var(--radius);
  background:var(--paper);
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  box-shadow:0 18px 44px rgba(0,0,0,.34),inset 0 1px 0 rgba(255,255,255,.22);
}
.rail-title{
  margin:0 0 6px;
  font-size:16px;
  font-weight:500;
  letter-spacing:.34em;
  color:#ffd7de;
}
.rail hr{
  margin:0 0 12px;
}
.rail nav ul{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:4px;
}
.rail nav a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:6px 12px;
  border-radius:14px;
  border:1px solid transparent;
  font-size:16px;
  color:var(--text-dim);
  text-decoration:none;
  transition:background .25s ease, border-color .25s ease, color .25s ease;
}
.rail nav a:hover{
  color:#fff;
  background:rgba(255,255,255,.13);
  border-color:rgba(255,255,255,.22);
}

.stage{min-width:0}

.paper{
  position:relative;
  overflow:hidden;
  padding:30px 30px 36px;
  border-radius:var(--radius);
  background:var(--paper);
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(20px) saturate(150%);
  backdrop-filter:blur(20px) saturate(150%);
  box-shadow:0 28px 70px rgba(0,0,0,.46),inset 0 1px 0 rgba(255,255,255,.24);
}
.paper::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:180px;
  background:linear-gradient(180deg,rgba(255,255,255,.14),transparent);
  pointer-events:none;
}

/* ---- 首屏 ---- */
.hero{
  position:relative;
  display:flex;
  align-items:center;
  gap:22px;
  min-height:min(45vh,380px);
  padding:8px 0 26px;
}
.hero-ghost{
  position:absolute;
  right:-14px;
  top:-22px;
  z-index:0;
  font-family:'Cinzel',serif;
  font-weight:700;
  font-size:clamp(58px,13vw,168px);
  line-height:.92;
  letter-spacing:-.02em;
  color:rgba(255,255,255,.07);
  white-space:nowrap;
  pointer-events:none;
  user-select:none;
}
.hero-copy{
  position:relative;
  z-index:1;
  flex:1 1 auto;
  min-width:0;
}
.hero h1{
  margin:0 0 14px;
  font-size:clamp(27px,4.2vw,44px);
  line-height:1.3;
  letter-spacing:.02em;
  background:linear-gradient(100deg,#ffffff 12%,#ffc7d0 58%,#d8b6ff);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.lede{
  margin:0;
  max-width:56ch;
  font-size:16px;
  color:var(--text-dim);
}
.hero-glyph{
  position:relative;
  z-index:1;
  flex:0 0 auto;
  width:112px;
  height:112px;
  object-fit:cover;
  border-radius:24px;
  border:1px solid rgba(255,255,255,.32);
  box-shadow:0 18px 40px rgba(139,0,255,.32);
}

/* ---- 正文排版 ---- */
.paper article{
  padding:26px 0 7px;
  border-top:1px solid var(--line-soft);
}
.paper article[id]{scroll-margin-top:100px}

.paper h2{
  margin:0 0 10px;
  font-size:clamp(21px,2.5vw,29px);
  line-height:1.34;
  letter-spacing:.02em;
  color:#fff;
}
.paper h3{
  margin:22px 0 8px;
  font-size:19px;
  line-height:1.42;
  color:#ffe3e8;
}
.paper hr{
  height:1px;
  border:0;
  margin:0 0 16px;
  background:linear-gradient(90deg,rgba(255,0,0,.7),rgba(139,0,255,.4),transparent);
}
.paper p{margin:0 0 15px;color:#e9dade}
.paper ul,.paper ol{margin:0 0 15px;padding-left:1.35em}
.paper li{margin:.34em 0}
.paper strong{color:#fff}
.paper a{text-decoration:underline;text-underline-offset:3px}
.paper blockquote{
  margin:0 0 16px;
  padding:14px 18px;
  border-left:2px solid var(--red);
  border-radius:0 16px 16px 0;
  background:rgba(255,255,255,.07);
  color:var(--text-dim);
}
.paper img{
  border-radius:20px;
  border:1px solid var(--line);
  margin:6px 0 16px;
}
.paper table{
  width:100%;
  border-collapse:collapse;
  margin:0 0 16px;
  font-size:16px;
}
.paper th,.paper td{
  padding:10px 12px;
  border:1px solid var(--line-soft);
  text-align:left;
}
.paper th{background:rgba(255,255,255,.08);color:#fff}

/* ---- 页脚：三列 dl ---- */
.foot{
  position:relative;
  z-index:1;
  max-width:1180px;
  margin:34px auto 0;
  padding:32px 20px 44px;
  border-top:1px solid var(--line);
}
.foot-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:26px;
  margin-bottom:28px;
}
.foot dl{margin:0}
.foot dt{
  margin:0 0 8px;
  font-size:14px;
  letter-spacing:.3em;
  color:#c8a6b2;
}
.foot dd{margin:0}
.foot dd a,.foot dd{
  color:var(--text-dim);
  font-size:16px;
}
.foot dd a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  text-decoration:none;
}
.foot dd a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.copy{
  margin:0;
  text-align:center;
  font-size:14px;
  letter-spacing:.18em;
  color:var(--text-mute);
}

/* ---- 动效 ---- */
html.js .reveal{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .7s ease, transform .7s cubic-bezier(.22,.7,.24,1);
}
html.js .reveal.in{
  opacity:1;
  transform:none;
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js .reveal{opacity:1;transform:none;transition:none}
  .glowfield span{will-change:auto}
  .cta{transition:none}
}

/* ---- 窄屏 ---- */
@media (max-width:900px){
  .wrap{
    grid-template-columns:minmax(0,1fr);
    gap:0;
    padding:16px 14px 44px;
  }
  .rail{display:none}

  .bar{
    flex-wrap:wrap;
    justify-content:center;
    gap:2px 10px;
    padding:8px 12px;
  }
  .brand{
    order:-1;
    flex:0 0 100%;
    display:flex;
    align-items:center;
    justify-content:center;
    min-height:42px;
    font-size:17px;
    letter-spacing:.18em;
  }
  .bar-nav ul{flex-wrap:wrap;justify-content:center}
  .bar-nav a{padding:0 9px}
  .bar-side{
    flex-wrap:wrap;
    justify-content:center;
  }

  .paper{
    padding:18px 16px 26px;
    border-radius:22px;
  }
  .hero{
    min-height:0;
    align-items:flex-start;
    gap:12px;
    padding:4px 0 18px;
  }
  .hero-ghost{
    font-size:clamp(52px,20vw,92px);
    top:-14px;
    right:-10px;
  }
  .hero h1{font-size:clamp(24px,7vw,30px)}
  .hero-glyph{
    width:84px;
    height:84px;
    border-radius:18px;
  }
  .paper article{padding:22px 0 6px}
  .paper article[id]{scroll-margin-top:150px}

  .foot{padding:26px 16px 40px}
  .foot-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
}

@media (max-width:420px){
  .hero-glyph{width:72px;height:72px}
  .foot-cols{grid-template-columns:minmax(0,1fr)}
}

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