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

:root{
  --violet:#6514ff;
  --magenta:#bf00ff;
  --ink:#1c1726;
  --paper:#f7f3ff;
  --tint:#efe7ff;
  --line:#1c1726;
  --r:10px;
  --pad:clamp(16px,4vw,54px);
  --serif:'EB Garamond',Georgia,'Songti SC','SimSun',serif;
  --sans:'Lato',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
}

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

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:-30vmax;
  z-index:0;
  pointer-events:none;
  background:repeating-linear-gradient(135deg,rgba(101,20,255,.075) 0 22px,rgba(101,20,255,0) 22px 46px);
  animation:drift 26s linear infinite;
}

@keyframes drift{
  from{transform:translate3d(0,0,0)}
  to{transform:translate3d(46px,46px,0)}
}

a{color:var(--violet)}
a:focus-visible,button:focus-visible{outline:3px solid var(--magenta);outline-offset:3px}

.skip{
  position:absolute;
  left:-9999px;
  top:0;
  z-index:70;
  padding:12px 18px;
  background:var(--ink);
  color:#fff;
  border-radius:0 0 var(--r) 0;
  font-weight:700;
  text-decoration:none;
}
.skip:focus{left:0}

/* ---------- 顶部 ---------- */
.mast{
  position:relative;
  z-index:3;
  display:grid;
  grid-template-columns:1fr auto 1fr auto;
  align-items:center;
  gap:10px;
  padding:12px var(--pad);
  background:var(--paper);
  border-bottom:3px solid var(--line);
}

.mast-side{display:flex;align-items:center;gap:2px;min-width:0}
.mast-side-b{justify-content:flex-end}

.mast-link{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  border-radius:var(--r);
  color:var(--ink);
  font-size:16px;
  font-weight:700;
  text-decoration:none;
  white-space:nowrap;
  transition:background 220ms ease,color 220ms ease,transform 220ms ease;
}
.mast-link:hover{background:var(--violet);color:#fff;transform:translateY(-2px)}

.brand{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 8px;
  font-family:var(--serif);
  font-size:clamp(18px,2.2vw,26px);
  font-weight:700;
  letter-spacing:.02em;
  color:var(--ink);
  text-decoration:none;
  text-align:center;
  white-space:nowrap;
}
.brand:hover{color:var(--violet)}

.burger{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:0 14px;
  border:3px solid var(--ink);
  border-radius:var(--r);
  background:var(--ink);
  color:#fff;
  font-family:inherit;
  font-size:16px;
  font-weight:700;
  cursor:pointer;
  transition:background 220ms ease,border-color 220ms ease;
}
.burger:hover{background:var(--magenta);border-color:var(--magenta)}
.burger-bars{
  width:18px;
  height:2px;
  background:currentColor;
  box-shadow:0 -6px 0 currentColor,0 6px 0 currentColor;
}

/* ---------- 粘性锚点条 ---------- */
.subbar{
  position:sticky;
  top:0;
  z-index:25;
  background:var(--ink);
  border-bottom:3px solid var(--magenta);
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:thin;
}
.subbar-list{
  display:flex;
  margin:0;
  padding:0;
  list-style:none;
  white-space:nowrap;
}
.subbar-list a{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:0 16px;
  color:#fff;
  font-size:16px;
  font-weight:700;
  text-decoration:none;
  transition:background 220ms ease,color 220ms ease;
}
.subbar-list a:hover{background:var(--magenta);color:#fff}

/* ---------- 全屏菜单 ---------- */
.menu{
  position:fixed;
  inset:0;
  z-index:60;
  display:flex;
  flex-direction:column;
  padding:18px var(--pad) 34px;
  background:var(--ink);
  color:#fff;
  visibility:hidden;
  transform:translateY(-102%);
  transition:transform 260ms ease,visibility 260ms ease;
  overflow-y:auto;
}
.menu.is-open{visibility:visible;transform:none}
body.menu-open{overflow:hidden}

.menu-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-bottom:14px;
  border-bottom:3px solid var(--magenta);
}
.menu-brand{
  font-family:var(--serif);
  font-size:clamp(18px,3vw,24px);
  font-weight:700;
}
.menu-close{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 16px;
  border:3px solid #fff;
  border-radius:var(--r);
  background:transparent;
  color:#fff;
  font-family:inherit;
  font-size:16px;
  font-weight:700;
  cursor:pointer;
  transition:background 220ms ease,border-color 220ms ease;
}
.menu-close:hover{background:var(--magenta);border-color:var(--magenta)}

.menu-nav{display:flex;flex-direction:column;padding-top:10px}
.menu-link{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:58px;
  padding:6px 0;
  border-bottom:2px solid rgba(255,255,255,.16);
  color:#fff;
  font-size:clamp(20px,4vw,30px);
  font-weight:700;
  text-decoration:none;
  transition:color 220ms ease,padding-left 220ms ease;
}
.menu-link:hover{color:var(--magenta);padding-left:10px}
.menu-idx{
  color:var(--magenta);
  font-size:16px;
  font-variant-numeric:tabular-nums;
  letter-spacing:.08em;
}

/* ---------- 主体 ---------- */
.main{position:relative;z-index:1}

.hero{
  position:relative;
  overflow:hidden;
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:center;
  gap:26px;
  min-height:45vh;
  padding:clamp(30px,5vw,56px) var(--pad);
  border-bottom:3px solid var(--line);
  background:linear-gradient(104deg,var(--tint) 0%,#ffffff 62%);
}

.hero-copy{position:relative;z-index:2;max-width:34ch}

.hero-h1{
  margin:0 0 14px;
  font-family:var(--serif);
  font-size:clamp(34px,6.4vw,72px);
  line-height:1.06;
  font-weight:700;
  letter-spacing:-.01em;
}

.hero-lead{
  margin:0;
  max-width:48ch;
  font-size:17px;
  color:#3a3350;
}

.hero-art{
  position:relative;
  z-index:2;
  width:clamp(84px,13vw,148px);
  aspect-ratio:1;
}
.hero-art .art{position:absolute;display:block;border:3px solid var(--line);border-radius:var(--r)}
.hero-art .a1{inset:0;background:var(--violet)}
.hero-art .a2{width:54%;height:54%;right:0;bottom:0;background:var(--magenta);transform:translate(16%,16%)}
.hero-art .a3{width:26%;height:26%;left:14%;top:14%;background:#fff}

.hero-num{
  position:absolute;
  right:clamp(6px,3vw,34px);
  bottom:-.2em;
  z-index:1;
  font-family:var(--serif);
  font-size:clamp(110px,24vw,230px);
  line-height:.8;
  font-weight:700;
  color:rgba(101,20,255,.12);
  pointer-events:none;
  user-select:none;
}

/* ---------- 内容区 ---------- */
.stage{
  display:grid;
  grid-template-columns:minmax(0,228px) minmax(0,1fr);
  align-items:start;
  gap:clamp(18px,3vw,44px);
  max-width:1180px;
  margin:0 auto;
  padding:clamp(24px,4vw,50px) var(--pad);
}

.rail{
  position:sticky;
  top:66px;
  padding:16px 14px 18px;
  border:3px solid var(--line);
  border-radius:var(--r);
  background:#fff;
}

.rail-kicker{
  display:block;
  font-size:16px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--magenta);
}

.rail-title{
  margin:2px 0 12px;
  font-family:var(--serif);
  font-size:28px;
  line-height:1.15;
  font-weight:700;
}

.rail-list{
  margin:0;
  padding:0;
  list-style:none;
  border-top:2px solid var(--line);
}

.rail-list a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:6px 4px;
  border-bottom:1px dashed #d5cbe8;
  color:var(--ink);
  font-size:16px;
  font-weight:700;
  text-decoration:none;
  transition:color 220ms ease,background 220ms ease,padding-left 220ms ease;
}
.rail-list a:hover{color:var(--violet);background:var(--tint);padding-left:9px}

.rail-num{
  color:var(--magenta);
  font-size:16px;
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
}

.content{min-width:0}
.content > section{
  padding:clamp(22px,3vw,34px) 0;
  border-top:3px solid var(--line);
  scroll-margin-top:70px;
}
.content > section:first-child{border-top:0;padding-top:0}
.content > section:nth-child(even){
  padding-right:clamp(14px,2vw,26px);
  padding-left:clamp(14px,2vw,26px);
  border-radius:var(--r);
  background:var(--tint);
}

.content h2{
  margin:0 0 .5em;
  padding-left:14px;
  border-left:8px solid var(--magenta);
  font-family:var(--serif);
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.18;
  font-weight:700;
}
.content h3{
  margin:1.4em 0 .4em;
  font-family:var(--serif);
  font-size:clamp(21px,2.4vw,27px);
  line-height:1.25;
  font-weight:600;
  color:var(--violet);
}
.content small{
  display:block;
  margin-bottom:6px;
  font-size:16px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--magenta);
}
.content p{margin:0 0 1em;max-width:68ch}
.content ul,.content ol{pargin:0 0 1em;padding-left:1.3em;margin-left:0}
.content li{margin:.35em 0}
.content img{
  max-width:100%;
  height:auto;
  border:3px solid var(--line);
  border-radius:var(--r);
}
.content blockquote{
  margin:1.2em 0;
  padding:14px 18px;
  border:3px solid var(--violet);
  border-radius:var(--r);
  background:#fff;
}
.content a{font-weight:700;text-decoration-thickness:2px;text-underline-offset:3px}

/* ---------- 页脚 ---------- */
.foot{
  position:relative;
  z-index:1;
  margin-top:clamp(28px,5vw,64px);
  border-top:3px solid var(--line);
  background:var(--ink);
  color:#fff;
}
.foot section{padding:clamp(16px,3vw,26px) var(--pad)}
.foot section + section{border-top:1px solid rgba(255,255,255,.16)}

.mega{
  margin:0;
  font-family:var(--serif);
  font-size:clamp(30px,9vw,84px);
  line-height:.95;
  font-weight:700;
  text-align:center;
  color:transparent;
  -webkit-text-stroke:2px var(--magenta);
  overflow-wrap:anywhere;
}

.foot-nav dl{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:0 4px;
  margin:0;
}
.foot-nav dt{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 8px;
  color:var(--tint);
  font-size:16px;
  font-weight:700;
  letter-spacing:.14em;
}
.foot-nav dd{margin:0}
.foot-nav dd a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  border-radius:var(--r);
  color:#fff;
  font-size:16px;
  font-weight:700;
  text-decoration:none;
  transition:background 220ms ease,color 220ms ease;
}
.foot-nav dd a:hover{background:var(--magenta);color:#fff}

.copy{
  margin:0;
  text-align:center;
  font-size:16px;
  color:#cfc6e2;
}

/* ---------- 断点 ---------- */
@media (max-width:960px){
  .mast{grid-template-columns:1fr auto 1fr}
  .mast-side{display:none}
  .brand{grid-column:2;justify-self:center}
  .burger{grid-column:3;justify-self:end}
  .stage{grid-template-columns:minmax(0,1fr)}
  .rail{position:static}
}

@media (max-width:560px){
  body{font-size:17px}
  .hero{grid-template-columns:minmax(0,1fr);min-height:0;padding-top:34px;padding-bottom:40px}
  .hero-art{display:none}
  .hero-num{bottom:-.16em}
  .content > section:nth-child(even){padding-right:12px;padding-left:12px}
  .foot-nav dl{gap:0 2px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::before{animation:none}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}

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