:root{
  --bg:#08080f;
  --ink:#1a1a2e;
  --ink-2:#101020;
  --red:#ff0000;
  --pink:#ff006e;
  --cyan:#00e5ff;
  --txt:#f4ecf7;
  --mute:#b6a7c6;
  --line:rgba(255,0,110,.38);
  --glow:0 0 12px rgba(255,0,110,.5), 0 0 34px rgba(255,0,0,.3);
}

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

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

body{
  margin:0;
  min-height:100vh;
  overflow-x:hidden;
  font-family:'Baloo 2','Comic Neue',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.78;
  color:var(--txt);
  background:
    radial-gradient(900px 520px at 10% -10%, rgba(255,0,110,.22), transparent 62%),
    radial-gradient(760px 500px at 94% 2%, rgba(255,0,0,.16), transparent 60%),
    linear-gradient(180deg,#0b0b18 0%,#08080f 45%,#0a0a15 100%);
  background-attachment:fixed;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(0,229,255,.18) 1px, transparent 1px);
  background-size:22px 22px;
  opacity:.6;
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.95), rgba(0,0,0,.25) 58%, transparent);
  mask-image:linear-gradient(180deg, rgba(0,0,0,.95), rgba(0,0,0,.25) 58%, transparent);
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:9;
  pointer-events:none;
  background:repeating-linear-gradient(180deg, rgba(255,255,255,.045) 0 1px, transparent 1px 3px);
  mix-blend-mode:screen;
  opacity:.65;
}

a{color:var(--cyan)}

img{max-width:100%;height:auto;display:block}

::selection{background:var(--pink);color:#fff}

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

/* ---------- 顶栏 ---------- */
.top{
  position:sticky;
  top:0;
  z-index:20;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:10px clamp(14px,4vw,40px);
  background:linear-gradient(180deg, rgba(10,10,22,.95), rgba(10,10,22,.72));
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(9px);
  backdrop-filter:blur(9px);
  box-shadow:0 10px 34px rgba(255,0,110,.14);
}

.brand{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:4px;
  border:1px solid rgba(255,0,110,.6);
  background:linear-gradient(140deg, rgba(255,0,110,.22), rgba(255,0,0,.12));
  box-shadow:var(--glow);
  text-decoration:none;
  transition:transform .22s ease, box-shadow .22s ease;
}

.brand:hover{transform:translateY(-1px) scale(1.03)}

.brand .logo{width:100%;height:100%;object-fit:contain;border-radius:3px}

.logo-fallback{
  font-size:22px;
  font-weight:700;
  line-height:1;
  color:#fff;
  text-shadow:0 0 10px var(--pink);
}

.nav{position:relative}

.menu-wrap{position:relative}

.menu-btn{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:0 16px;
  list-style:none;
  cursor:pointer;
  border-radius:4px;
  border:1px solid rgba(0,229,255,.45);
  background:rgba(0,229,255,.07);
  color:#e8faff;
  font-weight:600;
  letter-spacing:.06em;
  text-shadow:0 0 8px rgba(0,229,255,.6);
  transition:background .22s ease, box-shadow .22s ease;
}

.menu-btn::-webkit-details-marker{display:none}

.menu-btn::after{
  content:"";
  width:8px;
  height:8px;
  margin-top:-4px;
  border-right:2px solid currentColor;
  border-bottom:2px solid currentColor;
  transform:rotate(45deg);
  transition:transform .24s ease;
}

details[open] > .menu-btn{
  background:rgba(0,229,255,.15);
  box-shadow:0 0 20px rgba(0,229,255,.45);
}

details[open] > .menu-btn::after{transform:rotate(-135deg);margin-top:4px}

.menu{
  position:absolute;
  right:0;
  top:calc(100% + 10px);
  z-index:25;
  width:min(76vw,270px);
  margin:0;
  padding:8px;
  list-style:none;
  border-radius:6px;
  border:1px solid rgba(255,0,110,.5);
  background:linear-gradient(180deg,#17172b,#0c0c18);
  box-shadow:0 20px 50px rgba(0,0,0,.72), 0 0 26px rgba(255,0,110,.26);
}

.menu li{padding:0}

.menu li:not(:first-child){border-top:1px solid rgba(255,255,255,.06)}

.menu li.split{
  height:0;
  margin:6px 4px;
  border:0;
  border-top:1px dashed rgba(0,229,255,.45);
}

.menu a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:10px 12px;
  border-radius:4px;
  color:var(--txt);
  font-weight:600;
  text-decoration:none;
  transition:transform .18s ease, background .18s ease, color .18s ease;
}

.menu a:hover,.menu a:focus-visible{
  background:rgba(255,0,110,.18);
  color:#fff;
  transform:translateX(3px);
  text-shadow:0 0 10px var(--pink);
}

/* ---------- 主体骨架 ---------- */
main{
  position:relative;
  z-index:1;
  padding:0 clamp(14px,4vw,40px) 72px;
}

.doc{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:26px;
  max-width:1180px;
  margin:0 auto;
  padding-top:6px;
}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  display:flex;
  flex-direction:column;
  justify-content:center;
  min-height:70vh;
  padding:52px 0 46px;
  overflow:hidden;
}

.hero::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background-image:
    linear-gradient(rgba(255,0,110,.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,.12) 1px, transparent 1px);
  background-size:52px 52px;
  -webkit-mask-image:radial-gradient(circle at 32% 55%, #000 8%, transparent 78%);
  mask-image:radial-gradient(circle at 32% 55%, #000 8%, transparent 78%);
}

.hero-kicker{
  display:block;
  font-size:13px;
  letter-spacing:.32em;
  color:var(--cyan);
  text-shadow:0 0 10px rgba(0,229,255,.8);
}

.hero-title{
  position:relative;
  margin:12px 0 16px;
  font-size:clamp(2.1rem,7.6vw,4.6rem);
  font-weight:700;
  line-height:1.12;
  letter-spacing:.01em;
  color:#fff;
  overflow-wrap:break-word;
  text-shadow:0 0 14px rgba(255,0,110,.7), 0 0 44px rgba(255,0,0,.45), 4px 4px 0 rgba(26,26,46,.85);
}

.hero-title::before,
.hero-title::after{
  content:attr(data-text);
  position:absolute;
  left:0;
  top:0;
  width:100%;
  opacity:.75;
  pointer-events:none;
}

.hero-title::before{
  color:var(--cyan);
  clip-path:inset(0 0 62% 0);
  animation:glitch-a 4.4s steps(1) infinite;
}

.hero-title::after{
  color:var(--red);
  clip-path:inset(58% 0 0 0);
  animation:glitch-b 4.4s steps(1) infinite;
}

.hero-desc{
  max-width:48ch;
  margin:0;
  color:var(--mute);
  font-size:17px;
}

/* ---------- 侧栏 ---------- */
.side{
  padding:14px;
  border-radius:6px;
  border:1px solid rgba(0,229,255,.3);
  background:linear-gradient(180deg, rgba(0,229,255,.09), rgba(255,0,110,.06));
  box-shadow:inset 0 0 32px rgba(0,229,255,.09), 0 12px 28px rgba(0,0,0,.5);
}

.side-kicker{
  display:block;
  font-size:12px;
  letter-spacing:.2em;
  color:var(--cyan);
  overflow:hidden;
  white-space:nowrap;
  text-overflow:ellipsis;
}

.side-title{
  margin:2px 0 12px;
  padding-bottom:8px;
  font-size:17px;
  letter-spacing:.12em;
  color:#fff;
  border-bottom:1px solid rgba(255,0,110,.4);
  text-shadow:0 0 10px rgba(255,0,110,.6);
}

.side ul{
  margin:0;
  padding:0;
  list-style:none;
}

.side li{
  opacity:0;
  animation:rise .52s ease forwards;
}

.side a{
  display:block;
  min-height:42px;
  padding:9px 8px;
  border-left:2px solid rgba(255,0,110,.35);
  border-radius:0 4px 4px 0;
  color:var(--mute);
  font-size:15px;
  text-decoration:none;
  transition:color .18s ease, background .18s ease, border-color .18s ease;
}

.side a:hover,.side a:focus-visible{
  color:#fff;
  background:rgba(255,0,110,.16);
  border-left-color:var(--cyan);
  text-shadow:0 0 10px var(--pink);
}

/* ---------- 正文 ---------- */
.doc div{
  position:relative;
  padding:30px 0 6px;
  border-top:1px solid rgba(255,255,255,.08);
  overflow-wrap:break-word;
}

.doc div[id]{scroll-margin-top:86px}

.doc div:first-of-type{border-top:0;padding-top:8px}

.doc div > small,
.doc div small{
  display:block;
  margin-bottom:4px;
  font-size:12px;
  letter-spacing:.24em;
  color:var(--cyan);
  text-shadow:0 0 10px rgba(0,229,255,.55);
}

.doc h2{
  margin:2px 0 14px;
  padding-left:14px;
  font-size:clamp(1.45rem,3.6vw,2.1rem);
  line-height:1.3;
  color:#fff;
  border-left:4px solid var(--pink);
  text-shadow:0 0 14px rgba(255,0,110,.55);
}

.doc h3{
  margin:26px 0 10px;
  font-size:1.2rem;
  color:#ffe9f2;
  text-shadow:0 0 10px rgba(255,0,110,.35);
}

.doc p{margin:0 0 14px}

.doc ul,.doc ol{margin:0 0 16px;padding-left:22px}

.doc li{margin:4px 0}

.doc li::marker{color:var(--pink)}

.doc a{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px dashed rgba(0,229,255,.5);
}

.doc a:hover{color:#fff;border-bottom-color:var(--pink);text-shadow:0 0 10px var(--pink)}

.doc blockquote{
  margin:18px 0;
  padding:14px 16px;
  border-left:3px solid var(--red);
  border-radius:0 4px 4px 0;
  background:rgba(255,0,0,.08);
  color:#ffeaf1;
}

.doc blockquote p:last-child{margin-bottom:0}

.doc strong{color:#fff;text-shadow:0 0 10px rgba(255,0,110,.45)}

.doc hr{
  height:0;
  margin:22px 0;
  border:0;
  border-top:1px dashed rgba(255,255,255,.14);
}

.doc table{
  width:100%;
  margin:16px 0;
  border-collapse:collapse;
  font-size:16px;
}

.doc th,.doc td{
  padding:9px 10px;
  border:1px solid rgba(255,255,255,.14);
  text-align:left;
}

.doc th{background:rgba(255,0,110,.14);color:#fff}

/* ---------- 页脚 ---------- */
.foot{
  position:relative;
  z-index:1;
  margin-top:36px;
  padding:40px clamp(14px,4vw,40px) 26px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(255,0,110,.09), rgba(8,8,15,.92));
}

.foot-grid{
  display:grid;
  gap:24px;
  max-width:1180px;
  margin:0 auto;
}

.foot-brand{display:flex;flex-direction:column;gap:10px}

.foot-mark{
  display:flex;
  width:40px;
  height:40px;
  align-items:center;
  justify-content:center;
  border-radius:4px;
  border:1px solid rgba(255,0,110,.55);
  box-shadow:var(--glow);
  overflow:hidden;
}

.foot-mark img{width:100%;height:100%;object-fit:contain}

.foot address{
  font-style:normal;
  font-size:19px;
  font-weight:700;
  color:#fff;
  text-shadow:0 0 12px rgba(255,0,110,.6);
}

.foot-links ul{
  display:flex;
  flex-wrap:wrap;
  gap:2px 16px;
  margin:0;
  padding:0;
  list-style:none;
}

.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:8px 2px;
  color:var(--mute);
  font-size:16px;
  text-decoration:none;
  transition:color .18s ease, text-shadow .18s ease;
}

.foot-links a:hover,.foot-links a:focus-visible{color:#fff;text-shadow:0 0 12px var(--pink)}

.subs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  max-width:1180px;
  margin:28px auto 0;
}

.subs label{
  font-size:13px;
  letter-spacing:.2em;
  color:var(--cyan);
}

.subs input{
  flex:1 1 200px;
  min-height:46px;
  padding:0 14px;
  border-radius:4px;
  border:1px solid rgba(0,229,255,.42);
  background:rgba(255,255,255,.06);
  color:#fff;
  font:inherit;
}

.subs input::placeholder{color:#8f86a3}

.subs button{
  min-height:46px;
  padding:0 24px;
  border-radius:4px;
  border:1px solid var(--pink);
  background:linear-gradient(180deg, rgba(255,0,110,.92), rgba(255,0,0,.82));
  color:#fff;
  font:inherit;
  font-weight:700;
  letter-spacing:.08em;
  cursor:pointer;
  box-shadow:var(--glow);
  transition:transform .18s ease, box-shadow .18s ease;
}

.subs button:hover{transform:translateY(-1px);box-shadow:0 0 20px rgba(255,0,110,.75)}

.copy{
  max-width:1180px;
  margin:22px auto 0;
  padding-top:14px;
  border-top:1px dashed rgba(255,255,255,.12);
  font-size:14px;
  color:#8f86a3;
}

/* ---------- 回到顶部 ---------- */
.up{
  position:fixed;
  right:14px;
  bottom:18px;
  z-index:30;
  min-height:44px;
  padding:0 16px;
  border-radius:4px;
  border:1px solid rgba(0,229,255,.5);
  background:rgba(12,12,24,.92);
  color:#e8faff;
  font:inherit;
  font-size:15px;
  letter-spacing:.06em;
  cursor:pointer;
  opacity:0;
  transform:translateY(12px);
  pointer-events:none;
  transition:opacity .24s ease, transform .24s ease;
}

.up.on{opacity:1;transform:none;pointer-events:auto;box-shadow:0 0 18px rgba(0,229,255,.4)}

/* ---------- 动画 ---------- */
@keyframes rise{
  from{opacity:0;transform:translateX(-10px)}
  to{opacity:1;transform:none}
}

@keyframes glitch-a{
  0%,86%,100%{transform:translate(0,0)}
  88%{transform:translate(-4px,2px)}
  92%{transform:translate(3px,-1px)}
  96%{transform:translate(-2px,1px)}
}

@keyframes glitch-b{
  0%,84%,100%{transform:translate(0,0)}
  87%{transform:translate(4px,-2px)}
  91%{transform:translate(-3px,1px)}
  95%{transform:translate(2px,-1px)}
}

/* ---------- 断点 ---------- */
@media (min-width:760px){
  .foot-grid{grid-template-columns:1.05fr 1fr;align-items:start}
}

@media (min-width:900px){
  .doc{
    grid-template-columns:212px minmax(0,1fr);
    gap:34px;
    align-items:start;
  }

  .hero{grid-column:2;grid-row:1}

  .side{
    grid-column:1;
    grid-row:1;
    align-self:start;
    margin-top:44px;
  }

  .doc > div{grid-column:2}

  .foot-grid{grid-template-columns:1.15fr 1fr}
}

@media (min-width:1100px){
  .doc{grid-template-columns:236px minmax(0,1fr);gap:44px}
}

@media (max-width:899px){
  .hero{min-height:auto;padding:34px 0 26px}
  .hero-title{font-size:clamp(1.9rem,8.6vw,2.9rem)}
  .doc{gap:20px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001s !important;
    animation-iteration-count:1 !important;
    transition-duration:.001s !important;
  }
  .side li{opacity:1}
}

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