:root{
  --ink:#1c1726;
  --ink-deep:#120e1c;
  --violet:#6514ff;
  --magenta:#bf00ff;
  --paper:#f6f3ff;
  --muted:#b3a8c9;
  --line:rgba(246,243,255,.14);
  --glass:rgba(255,255,255,.055);
  --body:#dcd5ec;
  --bar-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{
  scroll-behavior:smooth;
  scroll-snap-type:y proximity;
  -webkit-text-size-adjust:100%;
}
body{
  margin:0;
  overflow-x:hidden;
  background:var(--ink);
  color:var(--paper);
  font:400 16px/1.7 Inter,system-ui,-apple-system,"Segoe UI","Noto Sans SC","PingFang SC",sans-serif;
  letter-spacing:.01em;
}
body::before{
  content:"";
  position:fixed;
  inset:-25%;
  z-index:0;
  pointer-events:none;
  background:
    repeating-linear-gradient(112deg,rgba(101,20,255,.22) 0 2px,transparent 2px 62px),
    repeating-linear-gradient(24deg,rgba(191,0,255,.14) 0 1px,transparent 1px 94px),
    radial-gradient(60% 45% at 78% 8%,rgba(101,20,255,.30),transparent 70%);
  animation:drift 26s linear infinite;
}
@keyframes drift{
  from{transform:translate3d(0,0,0)}
  to{transform:translate3d(-62px,31px,0)}
}
a{color:var(--paper)}
a:focus-visible,
.burger:focus-visible,
.mark:focus-visible{outline:2px solid var(--magenta);outline-offset:3px}
.toggle:focus-visible ~ .burger{outline:2px solid var(--magenta);outline-offset:3px}
img{max-width:100%;height:auto;display:block}

/* ---------- 底部固定条 ---------- */
.bar{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:60;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:10px clamp(14px,4vw,40px) calc(10px + env(safe-area-inset-bottom));
  background:rgba(18,14,28,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-top:1px solid var(--line);
}
.toggle{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;border:0;
  overflow:hidden;clip-path:inset(50%);white-space:nowrap;
}
.mark{
  position:relative;
  z-index:2;
  display:grid;
  place-items:center;
  width:44px;height:44px;
  flex:0 0 auto;
  text-decoration:none;
  color:#fff;
  font-size:19px;
  font-weight:700;
  background:linear-gradient(135deg,var(--violet),var(--magenta));
  transform:skewX(-9deg);
  transition:transform .2s ease,filter .2s ease;
}
.mark span{transform:skewX(9deg);display:block;line-height:1}
.markimg{width:44px;height:44px;object-fit:cover;transform:skewX(9deg)}
.mark:hover{transform:skewX(-9deg) translateY(-2px);filter:brightness(1.15)}
.burger{
  position:relative;
  z-index:2;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:88px;
  min-height:44px;
  padding:0 20px;
  cursor:pointer;
  font-size:16px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--paper);
  border:1px solid var(--line);
  background:var(--glass);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.burger:hover{background:var(--violet);border-color:var(--violet);color:#fff}
.burger .close-t{display:none}
.toggle:checked ~ .burger .open-t{display:none}
.toggle:checked ~ .burger .close-t{display:inline}

/* ---------- 全屏菜单 ---------- */
.map{
  position:fixed;
  inset:0;
  z-index:50;
  display:grid;
  place-items:center;
  padding:88px clamp(16px,6vw,64px) 124px;
  background:rgba(18,14,28,.96);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  opacity:0;
  visibility:hidden;
  transform:scale(1.03);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
}
.toggle:checked ~ .map{opacity:1;visibility:visible;transform:none}
body:has(.toggle:checked){overflow:hidden}
.map p{
  margin:0;
  max-width:920px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:center;
}
.map a{
  display:inline-block;
  padding:15px 24px;
  font-size:clamp(20px,2.5vw,30px);
  font-weight:600;
  letter-spacing:-.01em;
  text-decoration:none;
  color:var(--paper);
  border:1px solid var(--line);
  background:var(--glass);
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.map a:hover,.map a:focus-visible{
  background:var(--magenta);
  border-color:var(--magenta);
  color:#16071f;
  transform:translateY(-3px);
}

/* ---------- 主区 ---------- */
main{position:relative;z-index:1}

.hero{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:clamp(18px,4vw,54px);
  min-height:100svh;
  max-width:1240px;
  margin:0 auto;
  padding:clamp(84px,12vh,140px) clamp(20px,6vw,72px) 168px;
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:34px;
  background:linear-gradient(90deg,var(--violet),var(--magenta));
  clip-path:polygon(0 100%,100% 0,100% 100%);
}
.hero-art{
  position:relative;
  flex:0 0 auto;
  width:clamp(92px,15vw,176px);
  aspect-ratio:1;
}
.hero-art i{
  position:absolute;
  display:block;
  animation:float 7s ease-in-out infinite;
}
.hero-art i:nth-child(1){
  inset:0 34% 56% 0;
  background:linear-gradient(135deg,var(--violet),#38089e);
  transform:skewY(-7deg);
}
.hero-art i:nth-child(2){
  inset:52% 0 22% 44%;
  background:linear-gradient(135deg,var(--magenta),#6a0a92);
  transform:skewY(7deg);
  animation-delay:.8s;
}
.hero-art i:nth-child(3){
  inset:72% 62% 0 8%;
  background:rgba(246,243,255,.85);
  animation-delay:1.6s;
}
@keyframes float{
  0%,100%{translate:0 0}
  50%{translate:0 -9px}
}
.hero-txt{
  position:relative;
  max-width:660px;
  text-align:right;
}
.hero-txt h1{
  margin:0 0 22px;
  font-size:clamp(2.5rem,7vw,5rem);
  line-height:1.02;
  font-weight:700;
  letter-spacing:-.035em;
  text-wrap:balance;
  background:linear-gradient(120deg,#ffffff 30%,#c9b2ff 66%,var(--magenta));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.lede{
  margin:0 0 0 auto;
  max-width:44ch;
  padding-right:18px;
  border-right:4px solid var(--magenta);
  color:var(--muted);
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.6;
}

/* ---------- 正文骨架 ---------- */
.sheet{
  display:grid;
  grid-template-columns:minmax(0,248px) minmax(0,1fr);
  gap:0 clamp(26px,4.5vw,62px);
  max-width:1180px;
  margin:0 auto;
  padding:clamp(38px,6vw,70px) clamp(20px,5vw,52px) clamp(112px,12vw,140px);
}

/* ---------- 侧栏 ---------- */
.rail{
  grid-column:1;
  grid-row:1 / span 40;
  position:sticky;
  top:26px;
  align-self:start;
  padding:20px 18px 14px;
  font-size:16px;
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.rail h2{
  margin:0 0 12px;
  font-size:16px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--muted);
}
.rail h2 span{
  display:inline-block;
  padding-bottom:5px;
  border-bottom:2px solid var(--magenta);
}
.raillinks{
  display:flex;
  flex-direction:column;
  margin:0 0 22px;
}
.raillinks a{
  display:block;
  padding:10px 8px;
  color:var(--body);
  text-decoration:none;
  border-left:2px solid transparent;
  transition:padding .18s ease,border-color .18s ease,background .18s ease,color .18s ease;
}
.raillinks a:hover{
  padding-left:14px;
  color:#fff;
  border-left-color:var(--violet);
  background:rgba(101,20,255,.2);
}
.chips{display:flex;gap:8px;margin:0 0 20px}
.chips span{width:34px;height:34px;display:block}
.chips .c1{background:var(--violet)}
.chips .c2{background:var(--magenta)}
.chips .c3{background:var(--paper)}
.totop{margin:0}
.totop a{
  display:inline-block;
  padding:10px 2px;
  color:var(--muted);
  text-decoration:none;
  letter-spacing:.1em;
  border-bottom:1px solid var(--line);
}
.totop a:hover{color:var(--magenta);border-color:var(--magenta)}

/* ---------- 正文小节 ---------- */
.sheet > div{
  grid-column:2;
  padding:clamp(30px,4.2vw,56px) 0;
  border-top:1px solid var(--line);
  scroll-margin-top:24px;
  scroll-snap-align:start;
  animation:rise .6s cubic-bezier(.2,.7,.3,1) both;
}
.sheet > div:first-of-type{border-top:0;padding-top:0}
.sheet > div:nth-of-type(2){animation-delay:.05s}
.sheet > div:nth-of-type(3){animation-delay:.1s}
.sheet > div:nth-of-type(4){animation-delay:.15s}
.sheet > div:nth-of-type(5){animation-delay:.2s}
.sheet > div:nth-of-type(6){animation-delay:.25s}
.sheet > div:nth-of-type(7){animation-delay:.3s}
@keyframes rise{
  from{opacity:0;transform:translateY(20px)}
  to{opacity:1;transform:none}
}
.sheet > div h2{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin:0 0 18px;
  font-size:clamp(1.5rem,3.3vw,2.3rem);
  line-height:1.16;
  font-weight:700;
  letter-spacing:-.025em;
  text-wrap:balance;
}
.sheet > div h2::before{
  content:"";
  flex:0 0 auto;
  width:14px;height:14px;
  background:linear-gradient(135deg,var(--violet),var(--magenta));
  transform:skewY(-10deg);
}
.sheet > div h3{
  margin:30px 0 12px;
  font-size:clamp(1.12rem,2.1vw,1.42rem);
  line-height:1.3;
  font-weight:600;
  letter-spacing:-.01em;
}
.sheet > div p{
  margin:0 0 18px;
  max-width:70ch;
  color:var(--body);
}
.sheet > div ul,
.sheet > div ol{
  margin:0 0 18px;
  padding-left:1.3em;
  color:var(--body);
}
.sheet > div li{margin:0 0 9px}
.sheet > div li::marker{color:var(--magenta)}
.sheet > div strong{color:#fff;font-weight:600}
.sheet > div a{
  color:#d0aaff;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.sheet > div a:hover{color:#16071f;background:var(--magenta);text-decoration:none}
.sheet > div blockquote{
  margin:0 0 18px;
  padding:14px 20px;
  border-left:3px solid var(--magenta);
  background:var(--glass);
  color:var(--body);
}
.sheet > div img{margin:6px 0 18px}
.sheet > div figure{margin:0 0 18px}

/* ---------- 页脚 ---------- */
.foot{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,1fr) auto auto;
  align-items:end;
  gap:26px clamp(24px,4vw,48px);
  padding:clamp(40px,6vw,70px) clamp(20px,6vw,64px) clamp(100px,11vw,132px);
  border-top:1px solid var(--line);
  background:rgba(255,255,255,.028);
  overflow:hidden;
}
.brandmark{
  margin:0;
  font-size:clamp(2.1rem,9vw,5.4rem);
  line-height:.94;
  font-weight:700;
  letter-spacing:-.055em;
  background:linear-gradient(100deg,#fff 18%,var(--violet) 56%,var(--magenta));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.cp{margin:0;color:var(--muted);white-space:nowrap}
.foot small{display:flex;flex-wrap:wrap;gap:2px 16px;font-size:16px}
.foot small a{
  display:inline-block;
  padding:10px 0;
  color:var(--paper);
  text-decoration:none;
}
.foot small a:hover{color:var(--magenta)}

/* ---------- 窄屏 ---------- */
@media (max-width:860px){
  .hero{
    flex-direction:column-reverse;
    align-items:flex-end;
    justify-content:center;
    min-height:100svh;
    padding-bottom:140px;
  }
  .hero-txt{max-width:none}
  .hero-art{width:96px}
  .hero::after{height:26px}
  .sheet{
    grid-template-columns:minmax(0,1fr);
    gap:0;
    padding-bottom:120px;
  }
  .rail{
    grid-column:1;
    grid-row:auto;
    position:static;
    margin-bottom:30px;
  }
  .sheet > div{grid-column:1}
  .map p{flex-direction:column;align-items:stretch;width:100%;max-width:420px}
  .map a{text-align:center;font-size:20px;padding:16px 18px}
  .foot{grid-template-columns:minmax(0,1fr);gap:20px}
  .cp{white-space:normal}
}
@media (max-width:420px){
  .brandmark{font-size:clamp(1.9rem,12vw,2.8rem)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;scroll-snap-type:none}
  *,*::before,*::after{
    animation:none!important;
    transition:none!important;
  }
}

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