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

:root{
  --ink:#26171f;
  --rose:#ff0080;
  --mag:#ff00ff;
  --deep:#1c1017;
  --glass:rgba(255,255,255,.07);
  --line:rgba(255,255,255,.18);
  --line2:rgba(255,255,255,.1);
  --txt:#f1e5ec;
  --dim:#cdb6c5;
  --r:10px;
  --max:1180px;
}

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

html{
  background:var(--deep);
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  font-family:'Plus Jakarta Sans',system-ui,-apple-system,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.72;
  color:var(--txt);
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:-25%;
  z-index:-2;
  pointer-events:none;
  background:
    radial-gradient(38% 46% at 18% 22%, rgba(255,0,128,.58), transparent 62%),
    radial-gradient(42% 40% at 82% 16%, rgba(255,0,255,.42), transparent 60%),
    radial-gradient(48% 54% at 62% 86%, rgba(116,26,196,.5), transparent 66%),
    conic-gradient(from 190deg at 46% 52%, rgba(255,0,128,.28), rgba(255,0,255,.3), rgba(88,16,132,.3), rgba(255,0,128,.26));
  filter:blur(46px) saturate(1.15);
  opacity:.9;
  animation:aurora 26s ease-in-out infinite alternate;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:64px 64px;
  opacity:.45;
}

@keyframes aurora{
  0%{transform:translate3d(-2%,-1%,0) scale(1)}
  100%{transform:translate3d(3%,2.5%,0) scale(1.14)}
}

img{max-width:100%}

a{color:#ffb0da;text-underline-offset:3px}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

.reveal{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .6s ease, transform .6s ease;
}
.reveal.in{opacity:1;transform:none}

/* 顶栏 */
.topbar{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(23,13,19,.93);
  border-bottom:1px solid var(--line2);
}

.brand-row{
  display:flex;
  align-items:center;
  padding:10px 20px 0;
}

.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  color:var(--txt);
  text-decoration:none;
  font-weight:700;
  letter-spacing:.01em;
}
.logo img{width:32px;height:32px;border-radius:8px;object-fit:cover}
.logo-txt{font-size:18px}
.mark{
  width:26px;height:26px;
  border-radius:50%;
  background:conic-gradient(from 0deg,#ff0080,#ff00ff,#7a1bff,#ff0080);
  filter:saturate(1.2);
}

.menu-row{
  display:flex;
  align-items:center;
  gap:10px;
  padding:4px 20px 10px;
}

.menu>summary{
  list-style:none;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:var(--glass);
  font-size:15px;
  color:var(--txt);
}
.menu>summary::-webkit-details-marker{display:none}
.menu>summary:hover{border-color:var(--rose)}

.burger{
  width:16px;height:2px;
  display:inline-block;
  background:currentColor;
  box-shadow:0 -5px 0 currentColor, 0 5px 0 currentColor;
}

.menu>menu{display:none}

.menu[open]{
  position:fixed;
  inset:0;
  z-index:120;
  display:flex;
  flex-direction:column;
  padding:16px 20px 40px;
  overflow:auto;
  background:rgba(19,11,16,.97);
  border-top:1px solid var(--line);
}
.menu[open]>summary{align-self:flex-start}
.menu[open]>menu{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin:22px 0 0;
  padding:0;
  list-style:none;
  max-width:640px;
}
.menu[open]>menu li>a{
  display:flex;
  align-items:center;
  min-height:52px;
  padding:12px 16px;
  border:1px solid var(--line2);
  border-radius:var(--r);
  background:var(--glass);
  color:var(--txt);
  text-decoration:none;
  font-size:18px;
}
.menu[open]>menu li>a:hover{
  border-color:var(--rose);
  background:linear-gradient(100deg,rgba(255,0,128,.28),rgba(255,0,255,.2));
}

.contact{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 16px;
  border-radius:var(--r);
  background:linear-gradient(100deg,var(--rose),var(--mag));
  color:#fff;
  font-size:15px;
  font-weight:600;
  text-decoration:none;
}

/* 首屏 */
.hero{
  max-width:var(--max);
  margin:0 auto;
  padding:clamp(26px,6vw,64px) 20px clamp(26px,5vw,54px);
  display:grid;
  grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);
  gap:clamp(22px,5vw,54px);
  align-items:center;
  min-height:70vh;
}

.pill{
  display:inline-block;
  padding:6px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--glass);
  font-size:14px;
  letter-spacing:.04em;
}

.hero h1{
  margin:.45em 0 .7em;
  font-size:clamp(2rem,5.2vw,3.5rem);
  line-height:1.16;
  font-weight:700;
  letter-spacing:-.01em;
  background:linear-gradient(100deg,#ffffff 18%,#ffd6ec 62%,#ff9ad9);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.btn{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:0 26px;
  border-radius:var(--r);
  background:linear-gradient(100deg,var(--rose),var(--mag));
  color:#fff;
  font-weight:600;
  text-decoration:none;
  box-shadow:0 12px 30px rgba(255,0,128,.28);
}
.btn:hover{filter:brightness(1.08)}

.hero-art{
  position:relative;
  aspect-ratio:4/5;
  border-radius:var(--r);
  overflow:hidden;
  border:1px solid var(--line);
  background:
    radial-gradient(70% 60% at 20% 14%, rgba(255,0,128,.62), transparent 70%),
    radial-gradient(60% 55% at 86% 30%, rgba(255,0,255,.5), transparent 70%),
    radial-gradient(82% 70% at 50% 96%, rgba(122,27,255,.55), transparent 72%),
    #2a1320;
  isolation:isolate;
}

.hero-img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:0;
  transition:opacity 1s ease;
}
.hero-img.on{opacity:1}

.badge{
  position:absolute;
  z-index:2;
  padding:8px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(24,14,20,.62);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  font-size:14px;
  color:#fff;
}
.badge-a{top:16px;left:16px}
.badge-b{bottom:16px;right:16px;background:linear-gradient(100deg,rgba(255,0,128,.88),rgba(255,0,255,.88))}

/* 主体双栏 */
.wrap{
  max-width:var(--max);
  margin:0 auto;
  padding:6px 20px 52px;
  display:grid;
  grid-template-columns:250px minmax(0,1fr);
  gap:28px;
  align-items:start;
}

.side{
  position:sticky;
  top:126px;
  display:grid;
  gap:14px;
}

.side-card{
  padding:14px 16px;
  border:1px solid var(--line2);
  border-radius:var(--r);
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}

.side-card h3{
  margin:0 0 10px;
  font-size:15px;
  font-weight:600;
  letter-spacing:.06em;
  color:#fff;
}
.side-card h3>span{
  display:inline-block;
  padding-bottom:4px;
  background:linear-gradient(90deg,var(--rose),var(--mag)) left bottom/100% 2px no-repeat;
}

.side-list{display:grid}
.side-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:6px 0;
  font-size:15px;
  color:var(--dim);
  text-decoration:none;
  border-bottom:1px dashed var(--line2);
}
.side-list a:last-child{border-bottom:0}
.side-list a:hover{color:#fff}

.side-link{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:15px;
  color:#ffb0da;
}

.content{min-width:0}

.prose{
  padding:clamp(18px,3vw,34px);
  border:1px solid var(--line2);
  border-radius:var(--r);
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}

.prose>div{
  padding:26px 0;
  border-top:1px solid var(--line2);
  scroll-margin-top:128px;
}
.prose>div:first-child{border-top:0;padding-top:6px}

.prose h2{
  margin:.3em 0 .55em;
  font-size:clamp(1.32rem,3vw,1.9rem);
  line-height:1.34;
  font-weight:700;
  color:#fff;
}
.prose h3{
  margin:1.4em 0 .45em;
  font-size:1.14rem;
  color:#fff;
}
.prose p{margin:0 0 1em;color:#ead9e4}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.25em}
.prose li{margin:.32em 0}
.prose strong{color:#fff}
.prose a{color:#ffb0da}
.prose img{height:auto;border-radius:var(--r);margin:.4em 0}
.prose blockquote{
  margin:0 0 1.1em;
  padding:12px 16px;
  border-left:3px solid var(--rose);
  border-radius:0 var(--r) var(--r) 0;
  background:rgba(255,255,255,.05);
}
.prose table{width:100%;border-collapse:collapse;font-size:16px;margin-bottom:1.1em}
.prose th,.prose td{border:1px solid var(--line2);padding:10px;text-align:left}
.prose th{background:rgba(255,255,255,.06);color:#fff}
.prose hr{border:0;border-top:1px solid var(--line2);margin:1.6em 0}

/* 页脚 */
.foot{
  border-top:1px solid var(--line);
  background:rgba(17,10,15,.75);
  padding:32px 20px 22px;
}

.foot-form{
  max-width:var(--max);
  margin:0 auto 26px;
  padding:18px 20px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:linear-gradient(120deg,rgba(255,0,128,.16),rgba(255,0,255,.12));
}

.foot-form h2{
  margin:0;
  font-size:18px;
  font-weight:600;
  color:#fff;
}
.foot-form h2>span{
  display:inline-block;
  padding-bottom:4px;
  background:linear-gradient(90deg,var(--rose),var(--mag)) left bottom/100% 2px no-repeat;
}

.sub{display:flex;gap:10px;flex-wrap:wrap}
.sub input{
  min-height:46px;
  min-width:210px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(0,0,0,.32);
  color:#fff;
  font-family:inherit;
  font-size:16px;
}
.sub input::placeholder{color:#b79cab}
.sub button{
  min-height:46px;
  padding:0 24px;
  border:0;
  border-radius:var(--r);
  background:linear-gradient(100deg,var(--rose),var(--mag));
  color:#fff;
  font-family:inherit;
  font-size:16px;
  font-weight:600;
  cursor:pointer;
}

.foot-cols{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.fcol{margin:0}
.fcol dt{
  margin-bottom:6px;
  font-size:14px;
  letter-spacing:.1em;
  color:#fff;
}
.fcol dd{margin:0}
.fcol dd a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:6px 0;
  font-size:15px;
  color:var(--dim);
  text-decoration:none;
}
.fcol dd a:hover{color:#fff}

.foot-base{
  max-width:var(--max);
  margin:22px auto 0;
  padding-top:14px;
  border-top:1px solid var(--line2);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  font-size:14px;
  color:var(--dim);
}
.copy,.top-link{margin:0}
.top-link a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  color:#ffb0da;
}

/* 断点 */
@media (max-width:900px){
  .hero{
    grid-template-columns:1fr;
    min-height:0;
    padding-top:26px;
  }
  .hero-art{aspect-ratio:16/11}
  .wrap{grid-template-columns:1fr;padding-top:0}
  .side{
    position:static;
    order:2;
    grid-template-columns:1fr 1fr;
  }
  .prose>div{scroll-margin-top:112px}
}

@media (max-width:560px){
  body{font-size:17px}
  .side{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:1fr;gap:8px}
  .hero-art{aspect-ratio:5/4}
  .foot-form{padding:16px}
  .sub input{min-width:0;width:100%}
  .sub{width:100%}
  .sub button{width:100%}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::before{animation:none}
  .reveal{opacity:1;transform:none;transition:none}
  .hero-img{transition:none}
}

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