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

:root{
  --ink:#1a1a2e;
  --bg:#0c0b16;
  --panel:#14122a;
  --red:#ff0000;
  --mag:#ff006e;
  --txt:#eae7f5;
  --dim:#a9a3c4;
  --line:rgba(255,0,110,.32);
  --h:64px;
}

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

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

body{
  margin:0;
  min-height:100%;
  color:var(--txt);
  font-family:"Epilogue",system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.78;
  background:
    repeating-linear-gradient(90deg,rgba(255,0,110,.05) 0 1px,transparent 1px 3px),
    radial-gradient(130% 70% at 50% -10%,#221a3f 0%,#100e1f 45%,var(--bg) 78%),
    var(--bg);
  overflow-x:hidden;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:9;
  pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(0,0,0,.3) 0 2px,transparent 2px 4px);
  opacity:.42;
}

img{max-width:100%;height:auto}
p{margin:0 0 1em}
a{color:#ff6f9c}

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

/* ---------- 顶栏 ---------- */
.topbar{
  position:sticky;
  top:0;
  z-index:30;
  background:linear-gradient(180deg,rgba(11,10,20,.98),rgba(11,10,20,.88));
  border-bottom:1px solid var(--line);
  box-shadow:0 0 26px rgba(255,0,110,.22);
  backdrop-filter:blur(6px);
}

.nav{
  position:relative;
  display:grid;
  grid-template-areas:"brand brand" "left right";
  grid-template-columns:1fr auto;
  align-items:center;
  gap:4px 10px;
  max-width:1180px;
  margin:0 auto;
  padding:6px 14px 8px;
}

.brand{
  grid-area:brand;
  justify-self:center;
  font-family:"Anton","Epilogue",sans-serif;
  font-size:21px;
  line-height:1;
  letter-spacing:.16em;
  color:#fff;
  text-decoration:none;
  padding:10px 4px 8px;
  text-shadow:0 0 10px var(--red),0 0 26px rgba(255,0,110,.75);
}

.nav-left{grid-area:left;justify-self:start}
.nav-right{grid-area:right;justify-self:end;position:relative}

menu{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:4px;
}

.nv{
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:42px;
  padding:9px 7px;
  font-size:16px;
  letter-spacing:.03em;
  color:var(--dim);
  text-decoration:none;
  border-bottom:2px solid transparent;
  border-radius:4px;
  transition:color .18s ease,border-color .18s ease,text-shadow .18s ease;
}

.nv:hover,.nv:focus-visible{
  color:#fff;
  border-bottom-color:var(--red);
  text-shadow:0 0 12px var(--mag);
}

.ico{
  display:inline-block;
  flex:0 0 auto;
  width:6px;
  height:6px;
  background:var(--mag);
  box-shadow:0 0 9px var(--mag);
}

.nav-right>summary{
  list-style:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:9px 12px;
  font-size:16px;
  letter-spacing:.1em;
  color:#fff;
  cursor:pointer;
  border:1px solid var(--line);
  border-radius:4px;
  transition:background .18s ease,box-shadow .18s ease;
}
.nav-right>summary::-webkit-details-marker{display:none}
.nav-right>summary::after{
  content:"";
  width:0;height:0;
  border-left:4px solid transparent;
  border-right:4px solid transparent;
  border-top:5px solid var(--mag);
}
.nav-right[open]>summary{background:rgba(255,0,110,.14);box-shadow:0 0 16px rgba(255,0,110,.5)}

.nav-right menu{
  position:absolute;
  right:0;
  top:calc(100% + 8px);
  width:min(320px,calc(100vw - 28px));
  flex-direction:column;
  gap:2px;
  padding:8px;
  background:#0f0d1e;
  border:1px solid var(--line);
  border-radius:4px;
  box-shadow:0 0 34px rgba(255,0,110,.35);
  z-index:40;
}
.nav-right menu .nv{width:100%;justify-content:flex-start}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  display:grid;
  place-items:center;
  min-height:max(340px,45vh);
  padding-bottom:44px;
  overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 42px),0 100%);
  background:linear-gradient(135deg,rgba(255,0,0,.34),rgba(255,0,110,.2) 55%,rgba(26,26,46,.9));
  border-bottom:1px solid var(--line);
}

.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(255,0,110,.16) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,0,110,.16) 1px,transparent 1px);
  background-size:34px 34px;
  pointer-events:none;
}

.hero-img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.5;
  filter:saturate(1.25) contrast(1.1);
}

.hero-scrim{
  position:absolute;
  inset:0;
  background:radial-gradient(100% 80% at 50% 40%,rgba(12,11,22,.15),rgba(12,11,22,.86));
  pointer-events:none;
}

.hero-in{
  position:relative;
  z-index:2;
  width:100%;
  max-width:820px;
  padding:26px 18px 8px;
  text-align:center;
}

.hero-kicker{
  display:inline-flex;
  align-items:center;
  gap:9px;
  margin:0 0 10px;
  font-size:16px;
  letter-spacing:.24em;
  color:#ffd7e5;
  text-shadow:0 0 14px rgba(255,0,110,.8);
}

.hero-h1{
  position:relative;
  display:inline-block;
  margin:0 0 12px;
  font-family:"Anton","Epilogue",sans-serif;
  font-weight:400;
  font-size:clamp(34px,9vw,74px);
  line-height:1.06;
  letter-spacing:.03em;
  color:#fff;
  text-shadow:0 0 16px rgba(255,0,0,.85),0 0 46px rgba(255,0,110,.6);
}

.hero-h1::before,
.hero-h1::after{
  content:attr(data-text);
  position:absolute;
  left:0;
  top:0;
  width:100%;
  pointer-events:none;
  opacity:.85;
}
.hero-h1::before{color:var(--red);mix-blend-mode:screen;animation:glitch-a 3.6s steps(2,end) infinite}
.hero-h1::after{color:var(--mag);mix-blend-mode:screen;animation:glitch-b 4.4s steps(2,end) infinite}

.hero-sub{
  max-width:48ch;
  margin:0 auto;
  color:#dcd7ee;
  font-size:16px;
}

/* ---------- 布局骨架 ---------- */
.wrap{
  display:grid;
  grid-template-columns:1fr;
  gap:22px;
  max-width:1180px;
  margin:0 auto;
  padding:26px 16px 48px;
}

.side{
  display:grid;
  gap:12px;
  align-content:start;
}

.side-box{
  padding:12px 12px 14px;
  border:1px solid var(--line);
  border-radius:4px;
  background:linear-gradient(180deg,rgba(255,0,110,.08),rgba(26,26,46,.55));
  box-shadow:inset 0 0 22px rgba(255,0,110,.16);
}

.side-h{
  margin:0 0 10px;
  font-family:"Anton","Epilogue",sans-serif;
  font-weight:400;
  font-size:16px;
  letter-spacing:.12em;
  color:#fff;
  text-shadow:0 0 12px rgba(255,0,110,.75);
}
.side-h .tt{display:inline-flex;align-items:center;gap:9px}

.pm{
  width:8px;
  height:8px;
  background:var(--red);
  box-shadow:0 0 12px var(--red);
  display:inline-block;
  flex:0 0 auto;
}

.side-menu{display:grid;gap:2px}
.side-menu a{
  display:block;
  min-height:40px;
  padding:9px 8px;
  font-size:16px;
  color:var(--dim);
  text-decoration:none;
  border-left:2px solid transparent;
  border-radius:4px;
  transition:color .16s ease,border-color .16s ease,background .16s ease;
}
.side-menu a:hover,.side-menu a:focus-visible{
  color:#fff;
  border-left-color:var(--red);
  background:rgba(255,0,110,.12);
}

.side-top{margin:0;font-size:16px}
.side-top a{
  color:#fff;
  text-decoration:none;
  border-bottom:1px solid var(--line);
  padding-bottom:2px;
}

.body{min-width:0}

/* ---------- 正文 ---------- */
.content{
  padding:20px 16px 6px;
  border:1px solid rgba(255,0,110,.2);
  border-radius:4px;
  background:linear-gradient(180deg,rgba(26,26,46,.8),rgba(14,12,28,.62));
  box-shadow:0 0 44px rgba(0,0,0,.5);
}

.content>section{
  padding:4px 0 26px 14px;
  border-left:2px solid rgba(255,0,0,.45);
  border-bottom:1px dashed rgba(255,0,110,.24);
  scroll-margin-top:124px;
}
.content>section:last-child{border-bottom:0;padding-bottom:14px}

.content h2{
  position:relative;
  margin:.7em 0 .55em;
  padding-left:18px;
  font-family:"Anton","Epilogue",sans-serif;
  font-weight:400;
  font-size:clamp(22px,5.2vw,30px);
  line-height:1.24;
  letter-spacing:.02em;
  color:#fff;
  text-shadow:0 0 16px rgba(255,0,110,.7);
}
.content h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.42em;
  width:10px;
  height:10px;
  background:var(--red);
  box-shadow:0 0 12px var(--red);
}

.content h3{
  margin:1.1em 0 .5em;
  font-size:19px;
  line-height:1.4;
  letter-spacing:.02em;
  color:#ffe3ee;
}
.content h3 span{display:inline}

.content p{color:#e3dff0}
.content strong{color:#fff;text-shadow:0 0 10px rgba(255,0,110,.55)}
.content a{text-decoration:underline;text-decoration-style:dotted;text-underline-offset:3px}
.content a:hover{color:#fff;text-shadow:0 0 12px var(--mag)}

.content ul,.content ol{padding-left:22px;margin:0 0 1em}
.content li{margin:.35em 0}
.content li::marker{color:var(--mag)}

.content blockquote{
  margin:1em 0;
  padding:8px 0 8px 16px;
  border-left:3px solid var(--mag);
  background:rgba(255,0,110,.08);
  color:#f0ecff;
}

.content img,
.content figure img{
  display:block;
  margin:1em 0;
  border:1px solid var(--line);
  border-radius:4px;
}
.content figure{margin:1em 0}

.content table{
  width:100%;
  margin:1em 0;
  border-collapse:collapse;
  font-size:16px;
}
.content th,.content td{
  padding:8px 10px;
  border:1px solid rgba(255,0,110,.28);
  text-align:left;
}
.content th{background:rgba(255,0,110,.14);color:#fff}

/* ---------- 页脚 ---------- */
.foot{
  margin-top:34px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(12,11,22,.35),#090811);
  box-shadow:inset 0 0 46px rgba(255,0,110,.14);
}

.foot-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:10px 18px;
  max-width:1180px;
  margin:0 auto;
  padding:26px 16px 30px;
  text-align:center;
}

.foot-brand{
  flex:1 0 100%;
  font-family:"Anton","Epilogue",sans-serif;
  font-size:clamp(26px,7vw,42px);
  line-height:1.04;
  letter-spacing:.06em;
  color:#fff;
  text-decoration:none;
  text-shadow:0 0 14px var(--red),0 0 38px rgba(255,0,110,.6);
}

.foot-nav menu{justify-content:center;gap:2px}
.foot-nav .nv{font-size:16px;color:var(--dim)}

.copy{
  margin:0;
  font-size:16px;
  color:var(--dim);
  letter-spacing:.04em;
}

/* ---------- 动效 ---------- */
@keyframes glitch-a{
  0%,92%,100%{transform:translate(0,0);opacity:0}
  93%{transform:translate(-3px,-2px);opacity:.8}
  96%{transform:translate(2px,1px);opacity:.6}
}
@keyframes glitch-b{
  0%,88%,100%{transform:translate(0,0);opacity:0}
  90%{transform:translate(3px,2px);opacity:.75}
  95%{transform:translate(-2px,-1px);opacity:.55}
}

.rv{opacity:0;transform:translateY(18px);transition:opacity .55s ease,transform .55s ease}
.rv.in{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (min-width:640px){
  .hero{min-height:max(360px,45vh)}
  .foot-brand{flex:0 0 auto}
  .copy{flex:1 0 100%}
}

@media (min-width:900px){
  .wrap{
    grid-template-columns:220px minmax(0,1fr);
    gap:30px;
    padding:38px 24px 62px;
  }
  .side{position:sticky;top:96px}
  .content{padding:32px 34px 10px}
  .content>section{scroll-margin-top:96px;padding-left:18px;padding-bottom:32px}
  .foot-row{flex-wrap:nowrap;justify-content:space-between;text-align:left;padding:30px 24px 34px}
  .foot-brand{flex:0 0 auto}
  .copy{flex:0 0 auto}
  .foot-nav menu{justify-content:flex-start}
}

@media (min-width:980px){
  .nav{
    grid-template-areas:"left brand right";
    grid-template-columns:1fr auto 1fr;
    gap:10px 18px;
    padding:10px 24px;
  }
  .nav-left{justify-self:end}
  .nav-right{justify-self:start;position:static}
  .nav-right[open]>summary{display:none}
  .nav-right menu{
    position:static;
    width:auto;
    flex-direction:row;
    padding:0;
    background:none;
    border:0;
    box-shadow:none;
  }
  .nav-right menu .nv{width:auto}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .hero-h1::before,.hero-h1::after{animation:none;opacity:0}
  .rv{opacity:1;transform:none;transition:none}
  .nv,.side-menu a{transition:none}
}

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