@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,500;0,700;1,400&display=swap');

:root{
  --bg:#0d0d0d;
  --bg2:#150f1d;
  --line:rgba(128,0,255,.28);
  --neon:#8000ff;
  --hot:#ff00ff;
  --ink:#ece5f6;
  --body:#d2c8df;
  --dim:#a495b6;
  --r:4px;
}

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

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

body{
  margin:0;
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(128,0,255,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(128,0,255,.07) 1px,transparent 1px);
  background-size:52px 52px,52px 52px;
  color:var(--ink);
  font-family:Roboto,"Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.7;
  font-weight:400;
  overflow-x:hidden;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:90;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.04) 0 1px,transparent 1px 4px);
}

img{max-width:100%;height:auto;display:block;border-radius:var(--r)}

a{color:#eab4ff}

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

/* ---------- 顶栏 ---------- */
.hud-head{
  position:sticky;
  top:0;
  z-index:70;
  background:rgba(13,13,13,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}

.bar{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:.6rem;
  max-width:1240px;
  margin:0 auto;
  padding:.55rem 1rem;
  min-height:66px;
}

.brand{
  justify-self:center;
  padding:.45rem .5rem;
  color:#fff;
  font-size:1.15rem;
  font-weight:700;
  letter-spacing:.16em;
  text-decoration:none;
  text-shadow:0 0 14px rgba(255,0,255,.75),0 0 34px rgba(128,0,255,.55);
}

.pill{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:.45rem .95rem;
  border-radius:999px;
  border:1px solid rgba(255,0,255,.4);
  background:rgba(128,0,255,.13);
  color:#f5edff;
  font:inherit;
  font-size:1rem;
  font-weight:500;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:background .2s ease,border-color .2s ease,box-shadow .2s ease,color .2s ease;
}

.pill:hover,.pill:focus-visible{
  background:rgba(255,0,255,.26);
  border-color:var(--hot);
  box-shadow:0 0 18px rgba(255,0,255,.5);
  color:#fff;
}

.pill.lg{min-height:50px;padding:.6rem 1.6rem;font-size:1.05rem}

.nav-wrap{justify-self:start;position:relative}

.sum{list-style:none;letter-spacing:.1em;font-weight:500}
.sum::-webkit-details-marker{display:none}
.nav-wrap[open] .sum{background:rgba(255,0,255,.24);border-color:var(--hot);box-shadow:0 0 18px rgba(255,0,255,.45)}

.nav-menu{
  position:absolute;
  top:calc(100% + .55rem);
  left:0;
  z-index:80;
  display:flex;
  flex-wrap:wrap;
  gap:.45rem;
  width:min(25rem,84vw);
  margin:0;
  padding:.7rem;
  list-style:none;
  background:#160f1f;
  border:1px solid var(--line);
  border-radius:var(--r);
  box-shadow:0 0 38px rgba(128,0,255,.42);
}

.nav-menu .pill{font-size:.94rem;padding:.4rem .8rem}

.srch{justify-self:end;display:flex;align-items:center;gap:.4rem}

.srch input{
  width:9rem;
  min-height:44px;
  padding:.4rem .85rem;
  border-radius:999px;
  border:1px solid var(--line);
  background:#15101c;
  color:var(--ink);
  font:inherit;
  font-size:.95rem;
}

.srch input::placeholder{color:var(--dim)}
.srch input:focus{outline:none;border-color:var(--hot);box-shadow:0 0 16px rgba(255,0,255,.38)}
.srch .go{font-size:.94rem;padding:.4rem .85rem}

/* ---------- 主区栅格 ---------- */
main{
  display:grid;
  grid-template-columns:minmax(0,1fr) 17rem;
  column-gap:2rem;
  max-width:1240px;
  margin:0 auto;
  padding:0 1rem 3rem;
}

main > div{grid-column:1}
main > aside{grid-column:2;grid-row:2 / span 24;align-self:start;position:sticky;top:5.6rem}

/* ---------- 头图 ---------- */
.hero{
  grid-column:1 / -1;
  position:relative;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  align-items:center;
  gap:2rem;
  min-height:100vh;
  padding:5.5rem 0 3rem;
}

.hero::before{
  content:"01";
  position:absolute;
  right:-.4rem;
  top:9%;
  font-size:clamp(6rem,20vw,15rem);
  font-weight:700;
  line-height:.8;
  letter-spacing:-.04em;
  color:transparent;
  -webkit-text-stroke:1px rgba(255,0,255,.28);
  pointer-events:none;
}

.hero-txt{position:relative;text-align:center}

.hero h1{
  margin:0 0 1rem;
  font-size:clamp(1.9rem,5.2vw,3.2rem);
  line-height:1.22;
  font-weight:700;
  color:#fff;
  text-shadow:0 0 18px rgba(255,0,255,.6),0 0 46px rgba(128,0,255,.5);
  animation:glitch 7s infinite;
}

.lead{
  margin:0 auto 1.7rem;
  max-width:32ch;
  color:#cec1de;
  font-size:1.05rem;
}

.hero-go{margin:0}

.hero-fig{
  position:relative;
  margin:0;
  aspect-ratio:4 / 5;
  display:grid;
  place-items:center;
  overflow:hidden;
  border-radius:var(--r);
  background:
    radial-gradient(circle at 30% 18%,rgba(255,0,255,.24),transparent 62%),
    radial-gradient(circle at 76% 82%,rgba(128,0,255,.3),transparent 64%),
    #120d19;
  box-shadow:0 0 46px rgba(128,0,255,.28);
}

.hero-fig img{width:100%;height:100%;object-fit:cover;border-radius:0}

.hud{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}

.hud i{
  grid-area:1 / 1;
  border-radius:50%;
  border:1px dashed rgba(255,0,255,.44);
  animation:spin 18s linear infinite;
}

.hud i:nth-child(1){width:66%;aspect-ratio:1}
.hud i:nth-child(2){width:48%;aspect-ratio:1;border-color:rgba(128,0,255,.62);animation-duration:11s;animation-direction:reverse}
.hud i:nth-child(3){width:30%;aspect-ratio:1;animation-duration:7s}
.hud i:nth-child(4){width:7%;aspect-ratio:1;border:0;background:var(--hot);box-shadow:0 0 22px var(--hot);animation:none}

/* ---------- 正文区块 ---------- */
main div[id]{
  scroll-margin-top:6rem;
  padding:2.8rem 0;
  border-top:1px solid rgba(128,0,255,.2);
}

main div h2{
  margin:0 0 1rem;
  font-size:clamp(1.35rem,3.1vw,1.85rem);
  line-height:1.32;
  color:#fff;
}

main div h2 > span{
  display:inline-block;
  padding-bottom:.22rem;
  border-bottom:2px solid var(--hot);
  text-shadow:0 0 16px rgba(255,0,255,.5);
}

main div h3{margin:1.6rem 0 .6rem;font-size:1.15rem;color:#f3e9ff}
main p,main li{color:var(--body)}
main ul,main ol{padding-left:1.25rem}
main li{margin:.35rem 0}
main a{text-decoration-color:rgba(255,0,255,.55)}
main a:hover{color:#fff}
main blockquote{
  margin:1.2rem 0;
  padding:.9rem 1.1rem;
  border-left:3px solid var(--neon);
  border-radius:var(--r);
  background:#150f1d;
  color:#ded3ec;
}
main figure{margin:1.2rem 0}

/* ---------- 侧栏 ---------- */
.side{
  padding:1.1rem;
  border-radius:var(--r);
  background:var(--bg2);
  box-shadow:0 0 32px rgba(128,0,255,.2);
}

.side h2{
  margin:0 0 .85rem;
  font-size:1.02rem;
  font-weight:500;
  letter-spacing:.18em;
  color:var(--hot);
}

.side h2 > span{
  display:inline-block;
  padding-bottom:.18rem;
  border-bottom:1px solid rgba(255,0,255,.6);
}

.side-menu{
  display:grid;
  gap:.35rem;
  margin:0 0 .9rem;
  padding:0;
  list-style:none;
}

.side-menu .pill{justify-content:flex-start;padding:.35rem .75rem;font-size:.94rem}

.side-top{margin:0}
.side-top .pill{width:100%}

/* ---------- 结尾行动 ---------- */
.cta{
  grid-column:1 / -1;
  margin-top:2.2rem;
  padding:3.2rem 1.2rem;
  border-radius:var(--r);
  text-align:center;
  background:linear-gradient(118deg,rgba(128,0,255,.4),rgba(255,0,255,.24)),#100c16;
  box-shadow:inset 0 0 60px rgba(128,0,255,.35);
}

.cta h2{
  margin:0 0 1.3rem;
  font-size:clamp(1.7rem,4.8vw,2.5rem);
  letter-spacing:.1em;
  color:#fff;
  text-shadow:0 0 22px rgba(255,0,255,.6);
}

.cta h2 > span{border-bottom-color:rgba(255,255,255,.7)}
.cta-go{margin:0}

/* ---------- 页脚 ---------- */
footer{
  display:grid;
  grid-template-columns:1fr auto;
  gap:.6rem 1.5rem;
  align-items:start;
  max-width:1240px;
  margin:0 auto;
  padding:2.4rem 1rem 3.4rem;
  border-top:1px solid rgba(255,0,255,.28);
}

footer p{margin:0}

.foot-brand{
  font-weight:700;
  letter-spacing:.18em;
  color:#fff;
  text-shadow:0 0 14px rgba(255,0,255,.6);
}

.foot-nav{display:flex;flex-wrap:wrap;gap:.15rem .85rem;justify-self:end}

.foot-nav a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  color:#c9b8dd;
  font-size:.94rem;
  text-decoration:none;
  border-bottom:1px solid transparent;
}

.foot-nav a:hover{color:#fff;border-bottom-color:var(--hot)}

.foot-copy{
  grid-column:1 / -1;
  justify-self:center;
  margin-top:1rem;
  color:var(--dim);
  font-size:.86rem;
  text-align:center;
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}

@keyframes glitch{
  0%,90%,100%{transform:none}
  92%{transform:translate(-2px,1px) skewX(-2.4deg)}
  94%{transform:translate(2px,-1px) skewX(2deg)}
  96%{transform:translate(-1px,0) skewX(-1deg)}
  98%{transform:none}
}

@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 断点 ---------- */
@media (max-width:860px){
  .bar{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem;min-height:0;padding:.5rem .8rem}
  .brand{order:-1;flex:1 0 100%;text-align:center}
  .srch input{width:8rem}

  main{grid-template-columns:1fr;column-gap:0}
  main > aside{grid-column:1;grid-row:auto;position:static;margin-top:2rem}

  .hero{grid-template-columns:1fr;min-height:auto;gap:1.4rem;padding:2.2rem 0 1.4rem}
  .hero::before{font-size:6.2rem;top:.8rem;opacity:.55}
  .hero-fig{aspect-ratio:16 / 11;order:2}

  main div[id]{scroll-margin-top:9.5rem;padding:2.2rem 0}

  footer{grid-template-columns:1fr;text-align:center}
  .foot-nav{justify-self:center}
  .cta{padding:2.4rem 1rem}
}

@media (max-width:400px){
  .srch input{width:6.5rem}
  .srch .go{padding:.4rem .7rem}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
}

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