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

:root{
  --pink:#ff0080;
  --magenta:#ff00ff;
  --ink:#26171f;
  --ink-0:#100810;
  --line:rgba(255,255,255,.14);
  --r:4px;
  --dock:74px;
  --font-d:'Fredoka','Nunito',system-ui,sans-serif;
  --font-b:'Nunito',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

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

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

body{
  margin:0;
  font-family:var(--font-b);
  font-size:17px;
  line-height:1.78;
  color:#fbe9f4;
  background:var(--ink-0);
  overflow-x:hidden;
  padding-bottom:calc(var(--dock) + env(safe-area-inset-bottom));
  -webkit-font-smoothing:antialiased;
}

body::before{
  content:"";
  position:fixed;
  inset:-25vmax;
  z-index:-2;
  pointer-events:none;
  background:
    radial-gradient(45% 55% at 18% 22%, rgba(255,0,128,.80), transparent 62%),
    radial-gradient(40% 50% at 82% 12%, rgba(255,0,255,.68), transparent 60%),
    radial-gradient(52% 60% at 72% 84%, rgba(160,0,112,.68), transparent 66%),
    radial-gradient(45% 50% at 10% 88%, rgba(255,0,190,.50), transparent 62%),
    conic-gradient(from 210deg at 50% 50%, rgba(255,0,128,.34), rgba(255,0,255,.28), rgba(38,23,31,.92), rgba(255,0,128,.34));
  filter:blur(42px) saturate(125%);
  animation:aurora 28s ease-in-out infinite alternate;
}

@keyframes aurora{
  0%{transform:translate3d(0,0,0) scale(1) rotate(0deg);filter:blur(42px) saturate(125%) hue-rotate(0deg)}
  50%{transform:translate3d(-3%,2%,0) scale(1.09) rotate(4deg);filter:blur(54px) saturate(135%) hue-rotate(26deg)}
  100%{transform:translate3d(3%,-2.5%,0) scale(1.04) rotate(-4deg);filter:blur(46px) saturate(120%) hue-rotate(-20deg)}
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    linear-gradient(165deg, rgba(16,8,16,.30), rgba(16,8,16,.84) 72%),
    repeating-linear-gradient(115deg, rgba(255,255,255,.045) 0 2px, transparent 2px 8px);
}

a:focus-visible,
button:focus-visible{outline:2px solid #fff;outline-offset:3px;border-radius:2px}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  isolation:isolate;
  min-height:100svh;
  display:grid;
  place-items:center;
  padding:90px 20px calc(var(--dock) + 66px);
  overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% 92%,0 100%);
}

.hero-art{
  position:absolute;
  inset:0;
  margin:0;
  z-index:-1;
  display:grid;
  place-items:center;
  overflow:hidden;
}

.hero-art img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.40;
  mix-blend-mode:screen;
  filter:saturate(135%) contrast(105%);
}

.hero-brand{
  font-family:var(--font-d);
  font-weight:600;
  font-size:clamp(3.4rem,20vw,15rem);
  line-height:.92;
  letter-spacing:.05em;
  text-align:center;
  color:transparent;
  -webkit-text-stroke:2px rgba(255,255,255,.32);
  opacity:.62;
  padding-bottom:10vh;
  max-width:100%;
}

.hero-copy{
  position:relative;
  text-align:center;
  max-width:44rem;
}

.hero-copy h1{
  font-family:var(--font-d);
  font-weight:600;
  font-size:clamp(1.9rem,7vw,3.5rem);
  line-height:1.22;
  letter-spacing:.01em;
  margin:0 0 18px;
  color:#fff;
  background:linear-gradient(100deg,#ffffff,#ffd3ec 42%,#ffffff 88%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  filter:drop-shadow(0 6px 28px rgba(255,0,128,.55));
}

.hero-lead{
  margin:0 auto;
  max-width:34em;
  font-size:1.02rem;
  line-height:1.85;
  color:rgba(255,246,251,.86);
  text-shadow:0 2px 18px rgba(16,8,16,.75);
}

/* ---------- 正文区 ---------- */
.stage{display:block}

.body{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:26px;
  max-width:1180px;
  margin:0 auto;
  padding:0 16px 64px;
}

.prose,
.side{
  border:1px solid var(--line);
  border-radius:var(--r);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

.prose{
  background:rgba(38,23,31,.55);
  padding:22px 18px;
  box-shadow:0 20px 52px rgba(0,0,0,.36);
  min-width:0;
}

.prose > :first-child{margin-top:0}
.prose > :last-child{margin-bottom:0}

.prose [id]{scroll-margin-top:20px}

.prose h2{
  position:relative;
  font-family:var(--font-d);
  font-weight:600;
  font-size:clamp(1.35rem,3.6vw,1.9rem);
  line-height:1.36;
  color:#fff;
  letter-spacing:.01em;
  margin:2.1em 0 .5em;
  padding-top:20px;
}

.prose h2::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:58px;
  height:3px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--pink),var(--magenta));
}

.prose h3{
  font-family:var(--font-d);
  font-weight:500;
  font-size:1.16rem;
  line-height:1.5;
  color:#ffd7ec;
  margin:1.7em 0 .4em;
}

.prose p{margin:0 0 1.05em;color:rgba(251,233,244,.9)}

.prose p.subtitle,
.prose .subtitle{
  margin:-2px 0 1.2em;
  font-size:.95rem;
  line-height:1.7;
  color:rgba(255,255,255,.62);
  letter-spacing:.01em;
}

.prose ul,
.prose ol{margin:0 0 1.15em;padding-left:1.35em;color:rgba(251,233,244,.9)}

.prose li{margin:.35em 0}
.prose li::marker{color:var(--pink)}

.prose a{
  color:#ff9ed0;
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
  transition:color .18s ease,background .18s ease;
}

.prose a:hover{color:#fff;background:rgba(255,0,128,.20)}

.prose strong{color:#fff;font-weight:600}

.prose blockquote{
  margin:1.5em 0;
  padding:14px 18px;
  border-left:3px solid var(--pink);
  border-radius:var(--r);
  background:rgba(255,0,128,.13);
  color:#ffe9f4;
}

.prose blockquote p{margin:0}

.prose figure{margin:1.6em 0}
.prose img{display:block;max-width:100%;height:auto;border-radius:var(--r)}
.prose figcaption{margin-top:.5em;font-size:.85rem;color:rgba(255,255,255,.55)}

.prose table{
  width:100%;
  border-collapse:collapse;
  margin:1.3em 0;
  font-size:.92rem;
}

.prose th,
.prose td{
  border:1px solid rgba(255,255,255,.16);
  padding:8px 10px;
  text-align:left;
  vertical-align:top;
}

.prose th{background:rgba(255,0,128,.18);color:#fff}

.prose hr{
  border:0;
  height:1px;
  margin:2em 0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);
}

.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.9em;
  padding:1px 5px;
  border-radius:3px;
  background:rgba(255,255,255,.1);
}

/* ---------- 侧栏 ---------- */
.side{
  align-self:start;
  background:rgba(255,255,255,.07);
  padding:18px 16px;
  box-shadow:0 16px 40px rgba(0,0,0,.28);
}

.side h2{
  font-family:var(--font-d);
  font-weight:600;
  font-size:1.12rem;
  line-height:1.4;
  margin:0 0 6px;
  color:#fff;
}

.side .subtitle{
  margin:0 0 14px;
  font-size:.9rem;
  line-height:1.65;
  color:rgba(255,255,255,.6);
}

.side-nav{list-style:none;margin:0;padding:0;display:grid;gap:2px}

.side-nav a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:8px 10px;
  border-left:2px solid transparent;
  border-radius:var(--r);
  font-size:.95rem;
  color:#ffe3f1;
  text-decoration:none;
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}

.side-nav a:hover{
  background:rgba(255,0,128,.18);
  border-left-color:var(--pink);
  color:#fff;
}

/* ---------- 底部固定条 ---------- */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  display:flex;
  align-items:center;
  gap:10px;
  padding:8px 12px calc(8px + env(safe-area-inset-bottom));
  background:rgba(22,12,19,.74);
  border-top:1px solid rgba(255,255,255,.16);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 -12px 42px rgba(255,0,128,.20);
}

.dock .mark{
  flex:0 0 auto;
  width:42px;
  height:42px;
  display:grid;
  place-items:center;
  overflow:hidden;
  border-radius:50%;
  font-family:var(--font-d);
  font-weight:600;
  font-size:1.05rem;
  color:#fff;
  text-decoration:none;
  background:linear-gradient(135deg,var(--pink),var(--magenta));
  box-shadow:0 0 0 1px rgba(255,255,255,.28),0 0 22px rgba(255,0,128,.6);
}

.dock .mark img{width:100%;height:100%;object-fit:cover;display:block}

.dock-nav{
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  scrollbar-width:none;
}

.dock-nav::-webkit-scrollbar{display:none}

.dock-nav dl{display:flex;align-items:center;gap:2px;margin:0}

.dock-nav dt{margin:0}

.dock-nav dd{display:none}

.dock-nav a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 11px;
  border-radius:var(--r);
  font-size:.9rem;
  white-space:nowrap;
  color:rgba(255,255,255,.78);
  text-decoration:none;
  transition:background .18s ease,color .18s ease;
}

.dock-nav a:hover,
.dock-nav a[aria-current="true"]{
  background:linear-gradient(135deg,rgba(255,0,128,.92),rgba(255,0,255,.86));
  color:#fff;
}

.copy{
  flex:0 0 auto;
  margin:0;
  font-size:.76rem;
  line-height:1.4;
  color:rgba(255,255,255,.6);
  white-space:nowrap;
}

/* ---------- 入场 ---------- */
html.js .reveal{opacity:0;transform:translateY(22px)}

html.js .reveal.in{
  opacity:1;
  transform:none;
  transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1);
}

/* ---------- 断点 ---------- */
@media (min-width:700px){
  .body{grid-template-columns:minmax(0,1fr) 288px;gap:30px;padding:8px 24px 80px}
  .prose{padding:34px 36px}
  .side{position:sticky;top:26px;padding:22px 20px}
}

@media (min-width:1080px){
  .hero{padding-bottom:calc(var(--dock) + 90px)}
  .prose{padding:42px 46px}
  .body{gap:36px}
}

@media (max-width:600px){
  body{font-size:16px}
  .hero{padding:76px 16px calc(var(--dock) + 42px)}
  .hero-brand{opacity:.5;-webkit-text-stroke-width:1.5px}
  .prose{padding:20px 16px}
  .side{padding:16px 14px}
  .dock{gap:8px;padding-left:8px;padding-right:10px}
  .dock .mark{width:40px;height:40px}
  .dock-nav a{font-size:.85rem;padding:0 10px}
  .copy{font-size:.7rem}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::before{animation:none}
  html.js .reveal{opacity:1;transform:none;transition:none}
  .prose a,.side-nav a,.dock-nav a{transition:none}
}
</style>

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