:root{
  --bar-h: 108px;
  --bg: #180f1f;
  --bg-2: #241a2e;
  --bg-3: #2d2039;
  --ink: #f4eef8;
  --muted: #c6b3d4;
  --violet: #56228b;
  --violet-lit: #7b3fc4;
  --clay: #8b4513;
  --clay-lit: #c8834b;
  --line: rgba(244, 238, 248, .14);
  --mold-a: 26px 20px 30px 22px;
  --mold-b: 20px 30px 18px 28px;
  --carve: inset 0 1px 0 rgba(255, 255, 255, .16), inset 0 -10px 20px rgba(0, 0, 0, .38), 0 24px 44px -30px #000;
}

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

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

body{
  margin: 0;
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink);
  background: var(--bg);
  background-image:
    radial-gradient(70% 40% at 85% 0%, rgba(86, 34, 139, .34), transparent 65%),
    radial-gradient(60% 45% at 5% 30%, rgba(139, 69, 19, .2), transparent 70%);
  background-attachment: fixed;
  overflow-x: hidden;
}

h1, h2, h3, h4{
  margin: 0 0 .6em;
  line-height: 1.3;
  letter-spacing: -.012em;
  font-weight: 700;
}

p{ margin: 0 0 1.1em; }
p:last-child{ margin-bottom: 0; }

a{ color: var(--clay-lit); }
a:focus-visible,
summary:focus-visible,
button:focus-visible{
  outline: 2px solid var(--clay-lit);
  outline-offset: 3px;
}

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

/* ---------- 顶栏：品牌行 / 菜单行 ---------- */
.topbar{
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  gap: .55rem;
  padding: .7rem clamp(1.1rem, 5vw, 3.2rem) .8rem;
  background: rgba(24, 15, 31, .95);
  border-bottom: 1px solid var(--line);
}

.brand{
  display: inline-block;
  justify-self: start;
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: .3em;
  line-height: 1.45;
  color: var(--ink);
  text-decoration: none;
  padding: .1rem 0;
  min-height: auto;
}
.brand::after{
  content: "";
  display: block;
  height: 3px;
  width: 2.1rem;
  margin-top: .3rem;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--clay-lit), var(--violet-lit));
}

.menu-wrap{ justify-self: start; }

.menu-wrap > summary{
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  min-height: 44px;
  padding: .55rem 1.25rem;
  position: relative;
  z-index: 2;
  font-size: 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: linear-gradient(160deg, #30233d, #241a2e);
  box-shadow: var(--carve);
  user-select: none;
}
.menu-wrap > summary::-webkit-details-marker{ display: none; }
.menu-wrap > summary::before{
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  box-shadow: 0 6px 0 currentColor, 0 -6px 0 currentColor;
}
.menu-wrap[open] > summary{
  background: linear-gradient(160deg, var(--clay), #6d360f);
  border-color: rgba(255, 255, 255, .28);
}
.menu-wrap[open] > summary::before{ display: none; }
.menu-wrap[open] > summary::after{ content: "关闭"; }
.menu-wrap[open] > summary .lbl{ display: none; }

.menu-wrap > menu{
  position: fixed;
  inset: 0;
  z-index: 30;
  margin: 0;
  padding: calc(var(--bar-h) + 1.6rem) clamp(1.4rem, 7vw, 5.5rem) 3rem;
  list-style: none;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow-y: auto;
  background:
    radial-gradient(90% 70% at 80% 12%, #45295f, transparent 62%),
    radial-gradient(70% 60% at 8% 88%, #4a2a12, transparent 66%),
    #130c19;
}
.menu-wrap:not([open]) > menu{ display: none; }
.menu-wrap > menu li{ border-bottom: 1px solid rgba(244, 238, 248, .12); }
.menu-wrap > menu a{
  display: flex;
  align-items: center;
  min-height: 56px;
  padding: .65rem .2rem;
  font-size: clamp(1.22rem, 5.2vw, 2rem);
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -.01em;
}
.menu-wrap > menu a:hover{ color: var(--clay-lit); }

/* ---------- 首屏 ---------- */
.hero{
  position: relative;
  isolation: isolate;
  display: grid;
  align-content: end;
  min-height: calc(100vh - var(--bar-h));
  min-height: calc(100svh - var(--bar-h));
  padding: 5rem clamp(1.2rem, 5vw, 4.5rem) 3.4rem;
  overflow: hidden;
  border-radius: 0 0 52px 34px;
  background: linear-gradient(200deg, #2c1b3d, #1b1024 62%);
}

.hero-art{
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.08);
  will-change: transform;
}

.hero::before{
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(185deg, rgba(24, 15, 31, .48) 0%, rgba(31, 23, 38, .3) 42%, rgba(24, 15, 31, .93) 100%),
    radial-gradient(85% 65% at 4% 96%, rgba(86, 34, 139, .62), transparent 62%),
    radial-gradient(58% 58% at 92% 6%, rgba(139, 69, 19, .48), transparent 66%);
}

.hero::after{
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: .55;
  background-image: radial-gradient(rgba(255, 255, 255, .17) 1px, transparent 1.4px);
  background-size: 24px 24px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, .35) 62%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, .35) 62%, transparent 100%);
}

.hero-inner{
  position: relative;
  z-index: 2;
  max-width: 26ch;
}

.hero h1{
  margin: 0;
  font-size: clamp(2.1rem, 8.4vw, 4.6rem);
  line-height: 1.16;
  letter-spacing: -.03em;
  text-shadow: 0 12px 34px rgba(0, 0, 0, .6);
}

.hero .lede{
  margin: 1.1rem 0 0;
  max-width: 34ch;
  font-size: clamp(1rem, 2.2vw, 1.1rem);
  color: var(--muted);
}

/* ---------- 主体：侧栏在左 ---------- */
main{
  display: grid;
  grid-template-columns: minmax(0, 15.5rem) minmax(0, 1fr);
  gap: clamp(1.4rem, 4vw, 3.6rem);
  align-items: start;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(2.2rem, 5vw, 4rem) clamp(1.15rem, 5vw, 3rem) 4.5rem;
}

main > aside{
  position: sticky;
  top: calc(var(--bar-h) + 1.1rem);
  padding: 1.15rem 1.1rem 1.3rem;
  border-radius: var(--mold-a);
  border: 1px solid rgba(255, 255, 255, .07);
  background: linear-gradient(165deg, #2e2139, #201728);
  box-shadow: var(--carve);
}

main > aside small{
  display: block;
  font-size: .72rem;
  letter-spacing: .26em;
  color: var(--clay-lit);
}

main > aside h2{
  margin: .35rem 0 .95rem;
  font-size: 1.06rem;
}

main > aside ol{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .12rem;
}

main > aside a{
  display: flex;
  align-items: baseline;
  gap: .55rem;
  min-height: 44px;
  padding: .5rem .45rem;
  border-radius: 14px;
  font-size: .93rem;
  line-height: 1.42;
  color: var(--muted);
  text-decoration: none;
}
main > aside a span{
  font-size: .71rem;
  letter-spacing: .06em;
  color: var(--clay-lit);
  font-variant-numeric: tabular-nums;
}
main > aside a:hover{
  background: rgba(139, 69, 19, .24);
  color: #fff;
}

main > article{
  min-width: 0;
  padding-bottom: 1rem;
}

main > article > section{
  padding: 2.3rem 0 2.5rem;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar-h) + 1.2rem);
}
main > article > section:first-child{
  border-top: 0;
  padding-top: .2rem;
}

main > article > small{
  display: block;
  font-size: .76rem;
  letter-spacing: .24em;
  color: var(--clay-lit);
  margin-bottom: .45rem;
}

main > article h2{ font-size: clamp(1.4rem, 3.6vw, 1.95rem); }
main > article h3{ font-size: clamp(1.1rem, 2.4vw, 1.3rem); }
main > article h2 + p,
main > article h3 + p{ margin-top: .2rem; }

main > article p,
main > article li{ color: #e6dbee; }

main > article ul,
main > article ol{ padding-left: 1.3rem; margin: 0 0 1.2rem; }
main > article li{ margin-bottom: .45rem; }

main > article blockquote{
  margin: 1.4rem 0;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--clay);
  border-radius: 4px 20px 20px 4px;
  background: rgba(139, 69, 19, .16);
  color: var(--muted);
}

main > article img{
  border-radius: var(--mold-b);
  box-shadow: 0 26px 46px -32px #000;
  margin: 1.3rem 0;
}

main > article a{
  color: var(--clay-lit);
  text-underline-offset: 3px;
}

/* ---------- 页脚 ---------- */
footer{
  margin-top: 1rem;
  padding: 3rem clamp(1.15rem, 5vw, 4rem) 2rem;
  border-radius: 56px 56px 0 0;
  background: linear-gradient(172deg, #2b1f37, #150d1c 74%);
  border-top: 1px solid rgba(255, 255, 255, .09);
}

.foot-grid{
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3.5rem);
  align-items: start;
  max-width: 1100px;
  margin: 0 auto;
}

.foot-grid address{
  font-style: normal;
  display: grid;
  gap: .5rem;
  max-width: 42ch;
}
.foot-grid address strong{
  font-size: 1.1rem;
  letter-spacing: .22em;
}
.foot-grid address span{
  font-size: .95rem;
  line-height: 1.7;
  color: var(--muted);
}

.foot-grid ul{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .1rem .9rem;
}
.foot-grid a{
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: .4rem 0;
  font-size: .95rem;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid rgba(244, 238, 248, .1);
}
.foot-grid a:hover{ color: var(--clay-lit); }

.mega{
  max-width: 1100px;
  margin: 3rem auto 0;
  font-size: clamp(2.2rem, 11vw, 6.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.035em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(244, 238, 248, .34);
  text-align: left;
  overflow: hidden;
}

.copy{
  max-width: 1100px;
  margin: 1.4rem auto 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: .84rem;
  letter-spacing: .1em;
  color: rgba(198, 179, 212, .7);
}

/* ---------- 动效 ---------- */
@media (prefers-reduced-motion: no-preference){
  .hero h1,
  .hero .lede{
    animation: float-in .8s cubic-bezier(.22, .8, .3, 1) both;
  }
  .hero .lede{ animation-delay: .12s; }

  main > article > section{
    animation: rise .62s ease both;
  }
  main > article > section:nth-of-type(1){ animation-delay: .02s; }
  main > article > section:nth-of-type(2){ animation-delay: .08s; }
  main > article > section:nth-of-type(3){ animation-delay: .14s; }
  main > article > section:nth-of-type(4){ animation-delay: .2s; }
  main > article > section:nth-of-type(5){ animation-delay: .26s; }
  main > article > section:nth-of-type(6){ animation-delay: .32s; }
  main > article > section:nth-of-type(7){ animation-delay: .38s; }
  main > article > section:nth-of-type(n+8){ animation-delay: .44s; }

  .menu-wrap[open] > menu li{ animation: rise .4s ease both; }
  .menu-wrap[open] > menu li:nth-child(1){ animation-delay: .03s; }
  .menu-wrap[open] > menu li:nth-child(2){ animation-delay: .07s; }
  .menu-wrap[open] > menu li:nth-child(3){ animation-delay: .11s; }
  .menu-wrap[open] > menu li:nth-child(4){ animation-delay: .15s; }
  .menu-wrap[open] > menu li:nth-child(5){ animation-delay: .19s; }
  .menu-wrap[open] > menu li:nth-child(6){ animation-delay: .23s; }
  .menu-wrap[open] > menu li:nth-child(7){ animation-delay: .27s; }
}

@keyframes rise{
  from{ opacity: 0; transform: translateY(14px); }
  to{ opacity: 1; transform: none; }
}
@keyframes float-in{
  from{ opacity: 0; transform: translateY(22px); }
  to{ opacity: 1; transform: none; }
}

/* ---------- 断点 ---------- */
@media (max-width: 900px){
  main{ grid-template-columns: 1fr; }
  main > aside{ position: static; }
  main > aside ol{ grid-template-columns: 1fr 1fr; gap: .1rem .6rem; }
}

@media (max-width: 640px){
  :root{ --bar-h: 96px; }
  body{ font-size: 16px; }
  .hero{
    padding: 3.4rem 1.15rem 2.6rem;
    border-radius: 0 0 38px 26px;
  }
  .hero-inner{ max-width: none; }
  .foot-grid{ grid-template-columns: 1fr; }
  .foot-grid ul{ grid-template-columns: 1fr 1fr; }
  .mega{ margin-top: 2.2rem; }
  footer{ border-radius: 38px 38px 0 0; }
}

@media (max-width: 380px){
  main > aside ol{ grid-template-columns: 1fr; }
  .foot-grid ul{ grid-template-columns: 1fr; }
}

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