:root{
  --red:#ff0000;
  --vio:#8b00ff;
  --ink:#261717;
  --txt:#f8f0f0;
  --dim:#c9b5b7;
  --glass:rgba(255,255,255,.08);
  --glass-deep:rgba(38,23,23,.6);
  --line:rgba(255,255,255,.18);
  --line-soft:rgba(255,255,255,.1);
}
*,*::before,*::after{box-sizing:border-box}
html{
  background:#150c0d;
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}
body{
  margin:0;
  color:var(--txt);
  font-family:Barlow,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.66;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:-18% -12%;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(36% 32% at 8% 2%,rgba(255,0,0,.5),transparent 70%),
    radial-gradient(34% 38% at 94% 14%,rgba(139,0,255,.46),transparent 72%),
    radial-gradient(66% 52% at 44% 108%,rgba(255,0,0,.22),transparent 70%),
    linear-gradient(158deg,#301a1c 0%,#1c1011 56%,#120a0b 100%);
}
h1,h2,h3,.brand,.rail-label,.topnav a,.f-brand{
  font-family:"Barlow Condensed",Barlow,"PingFang SC","Microsoft YaHei",sans-serif;
}
a{color:inherit}
img{max-width:100%}
:focus-visible{outline:2px solid var(--vio);outline-offset:2px}

/* 顶栏：品牌独占一行 + 菜单行 */
.topbar{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--glass-deep);
  -webkit-backdrop-filter:blur(20px) saturate(150%);
  backdrop-filter:blur(20px) saturate(150%);
  border-bottom:1px solid var(--line);
  box-shadow:0 14px 44px rgba(0,0,0,.46),inset 0 -1px 0 rgba(255,255,255,.07);
}
.brandrow{
  display:flex;
  align-items:center;
  padding:10px clamp(14px,4vw,38px) 8px;
}
.brand{
  display:inline-block;
  font-size:clamp(26px,4.6vw,38px);
  font-weight:700;
  line-height:1.05;
  letter-spacing:.18em;
  text-decoration:none;
  color:#fff;
  text-shadow:0 0 24px rgba(255,0,0,.6),0 0 62px rgba(139,0,255,.4);
}
.brand::after{
  content:"";
  display:inline-block;
  width:8px;
  height:8px;
  margin-left:.55em;
  background:linear-gradient(135deg,var(--red),var(--vio));
}
.topnav{border-top:1px solid var(--line-soft)}
.topnav ul{
  list-style:none;
  margin:0;
  padding:0 clamp(6px,3vw,28px);
  display:flex;
  flex-wrap:wrap;
  align-items:stretch;
}
.topnav li{position:relative}
.topnav a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:9px 13px;
  border-bottom:2px solid transparent;
  color:#f3e7e7;
  text-decoration:none;
  font-size:17px;
  letter-spacing:.09em;
  transition:color .2s,background .2s,border-color .2s;
}
.topnav a:hover,.topnav a:focus-visible{
  color:#fff;
  border-bottom-color:var(--red);
  background:rgba(255,0,0,.15);
}
.group>a::after{
  content:"";
  width:6px;
  height:6px;
  margin-left:8px;
  border-right:1px solid rgba(255,255,255,.62);
  border-bottom:1px solid rgba(255,255,255,.62);
  transform:translateY(-2px) rotate(45deg);
}
.sub{
  list-style:none;
  margin:0;
  padding:6px;
  position:absolute;
  top:100%;
  left:0;
  min-width:216px;
  z-index:70;
  display:flex;
  flex-direction:column;
  background:rgba(30,18,19,.92);
  border:1px solid var(--line);
  border-bottom:2px solid var(--vio);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  box-shadow:0 22px 46px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.14);
  opacity:0;
  visibility:hidden;
  transform:translateY(-6px);
  transition:opacity .2s,transform .2s,visibility .2s;
}
.group:hover .sub,.group:focus-within .sub{opacity:1;visibility:visible;transform:none}
.sub a{min-height:42px;font-size:16px;border-bottom:0;border-left:2px solid transparent}
.sub a:hover,.sub a:focus-visible{border-left-color:var(--vio);background:rgba(139,0,255,.18)}

/* 首屏 */
.hero{
  position:relative;
  min-height:64vh;
  display:grid;
  align-items:end;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:linear-gradient(120deg,rgba(255,0,0,.24),rgba(139,0,255,.24));
}
.hero-media{position:absolute;inset:0;z-index:0}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity 1.1s ease}
.hero-slide.is-on{opacity:1}
.hero-shot{width:100%;height:100%;object-fit:cover;display:block}
.hero-veil{
  position:absolute;
  inset:0;
  z-index:1;
  background:
    linear-gradient(90deg,rgba(21,12,13,.94) 0%,rgba(21,12,13,.68) 48%,rgba(21,12,13,.2) 100%),
    linear-gradient(0deg,rgba(21,12,13,.88),rgba(21,12,13,0) 64%);
}
.hero-copy{
  position:relative;
  z-index:2;
  padding:0 clamp(16px,4.4vw,58px) clamp(24px,5vh,46px);
}
.hero-copy h1{
  margin:0;
  max-width:16em;
  font-size:clamp(32px,7.4vw,66px);
  font-weight:700;
  line-height:1.07;
  letter-spacing:.012em;
  text-align:left;
  color:#fff;
  text-shadow:0 2px 26px rgba(0,0,0,.62),0 0 42px rgba(255,0,0,.38);
}

/* 侧栏 + 正文 */
.shell{
  max-width:1240px;
  margin:0 auto;
  padding:clamp(20px,4vw,50px) clamp(14px,4vw,38px) clamp(38px,7vw,76px);
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(16px,3vw,34px);
}
.rail{
  padding:14px;
  background:var(--glass);
  border:1px solid var(--line);
  border-bottom:3px solid var(--vio);
  -webkit-backdrop-filter:blur(15px) saturate(130%);
  backdrop-filter:blur(15px) saturate(130%);
  box-shadow:0 18px 44px rgba(0,0,0,.34),inset 0 1px 0 rgba(255,255,255,.16);
}
.rail-label{
  margin:0 0 10px;
  padding-bottom:8px;
  border-bottom:1px solid var(--line);
  font-size:16px;
  letter-spacing:.2em;
  color:var(--dim);
}
.rail ul{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:4px;
}
.rail a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:6px 9px;
  border-left:2px solid transparent;
  color:#ecdede;
  text-decoration:none;
  font-size:16px;
  transition:color .2s,background .2s,border-color .2s;
}
.rail a:hover,.rail a:focus-visible{
  color:#fff;
  border-left-color:var(--vio);
  background:rgba(139,0,255,.17);
}
.wrap>section{
  padding:clamp(18px,3.2vw,42px);
  background:var(--glass);
  border:1px solid var(--line);
  border-bottom:3px solid var(--red);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  backdrop-filter:blur(16px) saturate(130%);
  box-shadow:0 28px 62px rgba(0,0,0,.4),inset 0 1px 0 rgba(255,255,255,.16);
}
div{max-width:76ch}
div>section{scroll-margin-top:150px}
div>section+section{
  margin-top:clamp(26px,4vw,44px);
  padding-top:clamp(22px,4vw,38px);
  border-top:1px solid var(--line-soft);
}
div h2{
  margin:0 0 10px;
  font-size:clamp(23px,3.4vw,31px);
  font-weight:600;
  line-height:1.26;
  letter-spacing:.02em;
  color:#fff;
}
div h3{
  margin:24px 0 10px;
  font-size:21px;
  font-weight:600;
  letter-spacing:.02em;
  color:#ffdede;
}
div p{margin:0 0 16px;color:#ecdede}
div ul,div ol{margin:0 0 18px;padding-left:1.25em}
div li{margin:0 0 8px}
div li::marker{color:var(--red)}
div strong{color:#fff}
div a{color:#ffb4b4;text-underline-offset:3px}
div hr{
  border:0;
  height:1px;
  margin:24px 0;
  background:var(--line-soft);
}
div h2+hr,div h3+hr{
  height:3px;
  width:72px;
  margin:0 0 20px;
  background:linear-gradient(90deg,var(--red),var(--vio));
}
div blockquote{
  margin:0 0 18px;
  padding:12px 0 12px 16px;
  border-left:3px solid var(--red);
  color:#e4d2d4;
}
div table{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:16px}
div th,div td{
  padding:9px 10px;
  border-bottom:1px solid var(--line-soft);
  text-align:left;
}
div th{color:#fff;font-weight:600}
div code{
  font-size:15px;
  padding:1px 5px;
  background:rgba(255,255,255,.1);
  border:1px solid var(--line-soft);
}

/* 页脚：三栏，仅 p 与 small */
.foot{
  max-width:1240px;
  margin:0 auto;
  padding:clamp(26px,5vw,56px) clamp(14px,4vw,38px) 40px;
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  border-top:1px solid var(--line);
}
.f-brand{
  margin:0;
  font-size:clamp(46px,12vw,96px);
  font-weight:700;
  line-height:.86;
  letter-spacing:.04em;
  color:rgba(255,255,255,.15);
  -webkit-text-stroke:1px rgba(255,255,255,.36);
}
.f-note{margin:0;font-size:16px;letter-spacing:.12em;color:var(--dim)}
.f-copy{margin:0;font-size:16px;color:#e8d8da}
.foot small{
  grid-column:1/-1;
  margin-top:14px;
  padding-top:14px;
  border-top:1px solid var(--line-soft);
  text-align:center;
  font-size:16px;
  color:var(--dim);
}

/* 动效 */
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.topnav>ul>li{animation:rise .45s ease both}
.topnav>ul>li:nth-child(1){animation-delay:.03s}
.topnav>ul>li:nth-child(2){animation-delay:.07s}
.topnav>ul>li:nth-child(3){animation-delay:.11s}
.topnav>ul>li:nth-child(4){animation-delay:.15s}
.hero-copy h1{animation:rise .6s ease both;animation-delay:.08s}
div>section{animation:rise .55s ease both}
div>section:nth-child(1){animation-delay:.05s}
div>section:nth-child(2){animation-delay:.1s}
div>section:nth-child(3){animation-delay:.15s}
div>section:nth-child(4){animation-delay:.2s}
div>section:nth-child(5){animation-delay:.25s}
div>section:nth-child(6){animation-delay:.3s}
div>section:nth-child(7){animation-delay:.35s}

@media (min-width:720px){
  .hero{min-height:70vh}
  .foot{grid-template-columns:1fr auto auto;align-items:end;gap:32px}
  .f-copy{justify-self:end}
}
@media (min-width:900px){
  .shell{grid-template-columns:216px minmax(0,1fr)}
  .rail{
    position:sticky;
    top:128px;
    align-self:start;
  }
  .rail ul{grid-template-columns:1fr}
}
@media (max-width:899px){
  .sub{
    display:contents;
    position:static;
    opacity:1;
    visibility:visible;
    transform:none;
    background:none;
    border:0;
    box-shadow:none;
    padding:0;
    -webkit-backdrop-filter:none;
    backdrop-filter:none;
  }
  .group>a::after{display:none}
  .topnav ul{padding:0 4px}
  .hero-copy{padding-bottom:34px}
  .brandrow{padding-bottom:6px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none !important;transition:none !important}
  .hero-slide{opacity:1}
}

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