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

:root{
  --ink:#26171f;
  --mag:#ff0080;
  --fux:#ff00ff;
  --line:rgba(255,255,255,.14);
  --glass:rgba(255,255,255,.055);
  --txt:#f2e7ee;
  --dim:#cdb7c5;
  --deep:rgba(18,9,14,.66);
}

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

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

body{
  margin:0;
  min-height:100%;
  max-width:100%;
  font-family:"Open Sans","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.75;
  color:var(--txt);
  background:var(--ink);
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:-28% -22%;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(38vw 38vw at 20% 24%, rgba(255,0,128,.88), transparent 62%),
    radial-gradient(33vw 33vw at 80% 18%, rgba(255,0,255,.72), transparent 62%),
    radial-gradient(46vw 42vw at 62% 84%, rgba(148,0,118,.78), transparent 66%),
    radial-gradient(30vw 30vw at 12% 82%, rgba(255,0,128,.5), transparent 64%),
    conic-gradient(from 210deg at 50% 50%, rgba(255,0,128,.24), rgba(255,0,255,.2), rgba(38,23,31,.2), rgba(255,0,128,.24));
  filter:blur(46px) saturate(115%);
  animation:aurora 36s ease-in-out infinite;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.17) 1px, transparent 1.3px);
  background-size:22px 22px;
  opacity:.32;
  mix-blend-mode:screen;
}

@keyframes aurora{
  0%{transform:translate3d(-5%,-3%,0) rotate(0deg) scale(1.06);opacity:.86}
  50%{transform:translate3d(6%,4%,0) rotate(9deg) scale(1.24);opacity:1}
  100%{transform:translate3d(-5%,-3%,0) rotate(0deg) scale(1.06);opacity:.86}
}

.shell{
  position:relative;
  z-index:1;
  max-width:100%;
  overflow-x:clip;
}

h1,h2,h3,h4,.mark,.foot-mark,.rail-h{
  font-family:"Poppins","Open Sans","PingFang SC","Microsoft YaHei",sans-serif;
  font-weight:600;
}

a{color:inherit}

/* 顶部条 */
.topbar{
  position:sticky;
  top:0;
  z-index:40;
  display:flex;
  align-items:center;
  gap:16px;
  max-width:100%;
  padding:10px clamp(14px,3vw,34px);
  background:rgba(38,23,31,.52);
  border-bottom:1px solid var(--line);
  border-radius:0;
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  transition:background .3s ease, box-shadow .3s ease;
}

.topbar.is-scrolled{
  background:rgba(20,10,16,.9);
  box-shadow:0 12px 32px rgba(0,0,0,.48);
}

.mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:46px;
  min-height:46px;
  text-decoration:none;
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(10px);
  flex:0 0 auto;
}

.mark-img{
  display:block;
  width:32px;
  height:32px;
  object-fit:contain;
}

.mark-txt{
  font-size:19px;
  font-weight:700;
  letter-spacing:.04em;
  background:linear-gradient(120deg,#fff,var(--fux) 55%,var(--mag));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.topnav{
  flex:1 1 auto;
  min-width:0;
  max-width:100%;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}

.topnav ul{
  display:flex;
  flex-wrap:wrap;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
  min-width:0;
}

.topnav a{
  position:relative;
  display:block;
  padding:12px 11px;
  font-size:16px;
  line-height:1.5;
  color:#f0e2ea;
  text-decoration:none;
  white-space:nowrap;
}

.topnav a::after{
  content:"";
  position:absolute;
  left:11px;
  right:11px;
  bottom:7px;
  height:2px;
  background:linear-gradient(90deg,var(--mag),var(--fux));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .28s ease;
}

.topnav a:hover::after,
.topnav a:focus-visible::after{transform:scaleX(1)}

.find{
  display:flex;
  align-items:stretch;
  flex:0 0 auto;
  max-width:100%;
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(10px);
}

.find input{
  width:130px;
  min-width:0;
  padding:0 12px;
  min-height:42px;
  border:0;
  background:transparent;
  color:var(--txt);
  font-family:inherit;
  font-size:16px;
  line-height:1.5;
  outline-offset:2px;
}

.find input::placeholder{color:var(--dim)}

.find button{
  padding:0 14px;
  min-height:42px;
  border:0;
  border-left:1px solid var(--line);
  background:linear-gradient(135deg,rgba(255,0,128,.6),rgba(255,0,255,.45));
  color:#fff;
  font-family:inherit;
  font-size:16px;
  line-height:1.5;
  cursor:pointer;
  transition:filter .2s ease;
}

.find button:hover{filter:brightness(1.18)}

/* 主区 */
main{
  display:grid;
  grid-template-columns:248px minmax(0,1fr);
  gap:clamp(24px,3vw,48px);
  max-width:1240px;
  margin:0 auto;
  padding:34px clamp(14px,3vw,34px) 64px;
  align-items:start;
}

main > div{
  min-width:0;
  max-width:100%;
}

/* 侧栏 */
.rail{
  position:sticky;
  top:86px;
  min-width:0;
  max-width:100%;
  padding:14px 12px;
  border:1px solid var(--line);
  background:var(--glass);
  border-radius:0;
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
}

.rail-h{
  margin:0 0 10px;
  padding-left:10px;
  font-size:16px;
  letter-spacing:.16em;
  color:#ffb6da;
  border-left:2px solid var(--mag);
}

.rail-nav{
  min-width:0;
  max-width:100%;
}

.rail-nav ul{
  margin:0;
  padding:0;
  list-style:none;
  min-width:0;
}

.rail-nav a{
  display:block;
  padding:11px 12px;
  min-height:44px;
  font-size:16px;
  line-height:1.5;
  color:var(--dim);
  text-decoration:none;
  border-left:2px solid transparent;
  transition:color .2s ease, background .2s ease, border-color .2s ease;
}

.rail-nav a:hover,
.rail-nav a:focus-visible{
  color:#fff;
  background:rgba(255,0,128,.16);
  border-left-color:var(--fux);
}

.rail-nav li.is-off{display:none}

/* 头部视觉 */
.hero{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:clamp(18px,3vw,32px);
  align-items:center;
  min-height:45vh;
  max-width:100%;
  padding:18px 0 26px;
}

.hero-copy{min-width:0}

.hero h1{
  margin:0;
  font-size:clamp(2rem,6vw,3.5rem);
  line-height:1.14;
  letter-spacing:-.015em;
  background:linear-gradient(102deg,#ffffff 4%,#ffa8d6 38%,var(--fux) 68%,var(--mag) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  text-wrap:balance;
  overflow-wrap:break-word;
}

.hero-art{
  position:relative;
  min-width:0;
  max-width:100%;
  min-height:232px;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:0;
  background-color:rgba(255,255,255,.045);
  background-image:
    linear-gradient(rgba(255,255,255,.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.1) 1px, transparent 1px);
  background-size:26px 26px;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  will-change:transform;
}

.hero-art::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(60% 60% at 22% 18%, rgba(255,0,128,.45), transparent 68%),
    radial-gradient(58% 58% at 82% 78%, rgba(255,0,255,.38), transparent 70%);
  mix-blend-mode:screen;
  pointer-events:none;
}

.hero-art-img{
  position:absolute;
  inset:0;
  width:100%;
  max-width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  opacity:.94;
  z-index:1;
}

/* 导语 */
.intro{
  margin:22px 0 4px;
  padding-left:15px;
  border-left:3px solid var(--mag);
}

.intro h2{
  margin:0 0 6px;
  font-size:16px;
  letter-spacing:.14em;
  color:#ffb6da;
  font-weight:600;
}

.subtitle{
  margin:0;
  font-size:16px;
  line-height:1.7;
  color:var(--dim);
  max-width:58ch;
}

/* 正文 */
div{
  max-width:100%;
  overflow-wrap:break-word;
}

div section{
  padding:28px 0;
  border-top:1px solid var(--line);
  scroll-margin-top:94px;
}

div section:first-of-type{margin-top:22px}

div h2{
  margin:0 0 14px;
  font-size:clamp(1.35rem,3.2vw,1.9rem);
  line-height:1.34;
  letter-spacing:.005em;
  color:#ffffff;
}

div h2 + .subtitle,
div h2 + p.subtitle{margin-top:-6px;margin-bottom:16px}

div h3{
  margin:24px 0 10px;
  font-size:1.08rem;
  line-height:1.5;
  color:#ffd0e8;
}

div p{margin:0 0 16px}

div ul,div ol{margin:0 0 16px;padding-left:1.35em}

div li{margin:7px 0}

div a{
  color:#ff9ad0;
  text-decoration:underline;
  text-underline-offset:3px;
}

div strong{color:#fff}

div blockquote{
  margin:0 0 18px;
  padding:14px 18px;
  border-left:3px solid var(--fux);
  background:var(--glass);
}

div table{
  display:block;
  width:100%;
  max-width:100%;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  border-collapse:collapse;
  margin:0 0 18px;
  font-size:16px;
}

div th,div td{
  border:1px solid var(--line);
  padding:9px 11px;
  text-align:left;
}

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

div pre{
  max-width:100%;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}

div code{
  font-size:15px;
  background:rgba(255,255,255,.1);
  padding:1px 5px;
}

/* 页脚 */
footer{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.15fr 1fr;
  gap:34px;
  max-width:100%;
  margin-top:48px;
  padding:38px clamp(16px,5vw,72px) 0;
  border-top:1px solid var(--line);
  background:var(--deep);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}

footer > *{min-width:0;max-width:100%}

.foot-mark{
  margin:0;
  font-size:clamp(1.5rem,3.4vw,2rem);
  line-height:1.2;
  letter-spacing:-.01em;
  background:linear-gradient(110deg,#fff,var(--fux) 62%,var(--mag));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.foot-nav ul{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:2px 18px;
  margin:0;
  padding:0;
  list-style:none;
  min-width:0;
}

.foot-nav a{
  display:block;
  min-height:42px;
  padding:9px 0;
  font-size:16px;
  line-height:1.5;
  color:var(--dim);
  text-decoration:none;
  transition:color .2s ease, transform .2s ease;
}

.foot-nav a:hover,
.foot-nav a:focus-visible{color:#fff;transform:translateX(3px)}

.base{
  grid-column:1 / -1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:22px;
  padding:14px 0 18px;
  border-top:1px solid var(--line);
  font-size:16px;
  color:var(--dim);
}

.base p{margin:0;min-width:0}

.totop{
  display:inline-block;
  padding:9px 14px;
  min-height:42px;
  text-decoration:none;
  color:#fff;
  border:1px solid var(--line);
  background:linear-gradient(135deg,rgba(255,0,128,.34),rgba(255,0,255,.22));
  transition:filter .2s ease, transform .2s ease;
}

.totop:hover{filter:brightness(1.2);transform:translateY(-2px)}

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

/* 断点 */
@media (max-width:900px){
  main{
    grid-template-columns:minmax(0,1fr);
    gap:20px;
    padding:16px 15px 44px;
  }
  .rail{position:static;min-width:0;max-width:100%;padding:11px 10px}
  .rail-h{margin:0 0 8px;font-size:16px}
  .rail-nav{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .rail-nav ul{display:flex;gap:8px;overflow-x:auto;min-width:0;padding-bottom:4px}
  .rail-nav a{border-left:0;border-bottom:2px solid transparent;white-space:nowrap;padding:10px 12px}
  .rail-nav a:hover,.rail-nav a:focus-visible{border-left-color:transparent;border-bottom-color:var(--fux)}
  .hero{grid-template-columns:minmax(0,1fr);min-height:0;padding:14px 0 20px}
  .hero h1{font-size:clamp(1.85rem,8.5vw,2.6rem)}
  .hero-art{min-height:168px;margin-top:18px}
  main > div section{scroll-margin-top:120px}
}

@media (max-width:820px){
  .topbar{flex-wrap:wrap;row-gap:6px;gap:10px;padding:8px 12px}
  .topnav{order:3;flex:1 1 100%;width:100%;max-width:100%;min-width:0}
  .topnav ul{flex-wrap:nowrap;min-width:0}
  .find{order:2;margin-left:auto;min-width:0}
  .find input{width:96px}
  footer{grid-template-columns:minmax(0,1fr);gap:18px;padding:28px 16px 0}
  .foot-nav ul{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .base{flex-wrap:wrap}
}

@media (min-width:901px) and (max-width:1080px){
  main{grid-template-columns:210px minmax(0,1fr)}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  body::before{animation:none}
  .hero-art{will-change:auto}
  .topnav a::after,.foot-nav a,.totop{transition:none}
}

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