@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,600;0,700;0,800;1,400&display=swap');

:root{
  --ink:#1f1726;
  --cream:#f4eee8;
  --muted:#c6bccf;
  --purple:#56228b;
  --purple-soft:#7b4bb0;
  --ochre:#8b4513;
  --ochre-soft:#c98a4b;
  --line:rgba(244,238,232,.14);
  --shadow:0 20px 42px -24px rgba(0,0,0,.95);
}

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

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

body{
  margin:0;
  min-height:100vh;
  font-family:'Plus Jakarta Sans',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;
  font-size:1.0625rem;
  line-height:1.75;
  color:var(--cream);
  background-color:var(--ink);
  background-image:
    radial-gradient(38rem 30rem at 88% -8%, rgba(86,34,139,.55), transparent 62%),
    radial-gradient(30rem 24rem at 2% 24%, rgba(139,69,19,.40), transparent 66%),
    radial-gradient(46rem 34rem at 62% 108%, rgba(86,34,139,.34), transparent 70%),
    radial-gradient(circle at 20% 60%, rgba(244,238,232,.05) 0 1px, transparent 1px);
  background-size:auto,auto,auto,14px 14px;
  background-attachment:fixed,fixed,fixed,scroll;
  background-repeat:no-repeat;
  overflow-x:hidden;
}

a{color:inherit}
:focus-visible{outline:2px solid var(--ochre-soft);outline-offset:3px}

.vh{
  position:absolute;
  width:1px;height:1px;
  overflow:hidden;
  clip-path:inset(50%);
}

/* ---------- 顶部：品牌居中，菜单分列两侧 ---------- */
.masthead{
  max-width:1220px;
  margin:0 auto;
  padding:1rem clamp(.8rem,3vw,2rem) .35rem;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:.4rem 1rem;
}

.menu{min-width:0;overflow-x:auto;scrollbar-width:none}
.menu::-webkit-scrollbar{display:none}
.menu p{
  display:flex;
  align-items:center;
  gap:.1rem;
  margin:0;
  flex-wrap:nowrap;
}
.menu-a p{justify-content:flex-end}
.menu a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:.4rem .62rem;
  font-size:.94rem;
  font-weight:600;
  color:var(--muted);
  text-decoration:none;
  white-space:nowrap;
  border-radius:999px;
  transition:color .2s ease,background .2s ease;
}
.menu a:hover{color:var(--cream);background:rgba(244,238,232,.09)}

.brand{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  min-height:44px;
  padding:.3rem .5rem;
  font-size:1.15rem;
  font-weight:800;
  letter-spacing:.01em;
  text-decoration:none;
  color:var(--cream);
}
.brand::before{
  content:"";
  width:1.1rem;height:1.1rem;
  border-radius:62% 38% 55% 45%/48% 58% 42% 52%;
  background:linear-gradient(140deg,var(--purple-soft),var(--ochre-soft));
  box-shadow:0 0 0 3px rgba(139,69,19,.18);
}

/* ---------- 二级粘性锚点条 + 搜索 ---------- */
.subbar{
  position:sticky;
  top:0;
  z-index:30;
  display:flex;
  align-items:center;
  gap:.6rem;
  padding:.45rem clamp(.8rem,3vw,2rem);
  background:rgba(31,23,38,.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}

.find{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:.2rem;
  padding:.1rem .1rem .1rem .75rem;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(244,238,232,.07);
}
.find input{
  width:8rem;
  min-height:38px;
  border:0;
  background:none;
  font:inherit;
  font-size:.9rem;
  color:var(--cream);
  outline:none;
}
.find input::placeholder{color:rgba(198,188,207,.75)}
.find button{
  width:2.5rem;
  height:2.5rem;
  min-height:40px;
  border:0;
  border-radius:999px;
  background:linear-gradient(140deg,var(--purple),var(--ochre));
  color:#fff;
  font:inherit;
  font-size:.85rem;
  cursor:pointer;
}

.chips{
  display:flex;
  gap:.4rem;
  margin:0;
  padding:.15rem 0;
  overflow-x:auto;
  scrollbar-width:none;
}
.chips::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:.4rem .82rem;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:.85rem;
  color:var(--muted);
  text-decoration:none;
  white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.chip:hover{color:var(--cream);border-color:rgba(201,138,75,.6)}
.chip.on{
  color:#fff;
  border-color:transparent;
  background:linear-gradient(140deg,var(--purple),var(--ochre));
}

/* ---------- 主体 ---------- */
main{
  max-width:1220px;
  margin:0 auto;
  padding:0 clamp(.8rem,3vw,2rem) 2rem;
}

.hero{
  position:relative;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  align-items:center;
  gap:clamp(1rem,3vw,2.4rem);
  min-height:45vh;
  margin:1.1rem 0 1.7rem;
  padding:clamp(1rem,3vw,2rem);
  border:1px solid var(--line);
  border-radius:32px 22px 36px 20px;
  overflow:hidden;
  background:linear-gradient(152deg,#2c1c3f,#241a2e 55%,#2b1c18);
  box-shadow:var(--shadow);
}
.hero::after{
  content:"";
  position:absolute;
  left:36%;
  right:-12%;
  bottom:-28%;
  height:58%;
  transform:rotate(-7deg);
  background:linear-gradient(100deg,rgba(139,69,19,.5),rgba(86,34,139,.12));
  border-radius:48% 52% 40% 60%/60% 40% 62% 38%;
  pointer-events:none;
}

.hero-art{
  position:relative;
  z-index:1;
  margin:0;
  display:grid;
  place-items:center;
}
.blob{
  width:min(100%,25rem);
  height:auto;
  filter:drop-shadow(0 22px 34px rgba(0,0,0,.55));
  animation:drift 30s linear infinite;
}
@keyframes drift{to{transform:rotate(360deg)}}

.hero-frame{
  position:absolute;
  inset:13%;
  overflow:hidden;
  border:2px solid rgba(244,238,232,.22);
  border-radius:50% 50% 46% 54%/56% 44% 56% 44%;
  box-shadow:var(--shadow);
}
.hero-frame img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}

.hero-copy{
  position:relative;
  z-index:2;
  text-align:right;
}
.eyebrow{
  margin:0 0 .35rem;
  font-size:.76rem;
  letter-spacing:.3em;
  color:var(--ochre-soft);
}
h1{
  margin:0 0 .6rem;
  font-size:clamp(1.72rem,4.2vw,2.7rem);
  line-height:1.24;
  letter-spacing:-.01em;
}
.lede{
  margin:0;
  font-size:1rem;
  line-height:1.7;
  color:var(--muted);
}

/* ---------- 正文：左栏目录 + 右栏内容 ---------- */
.shell{
  display:grid;
  grid-template-columns:minmax(0,218px) minmax(0,1fr);
  gap:clamp(1rem,2.5vw,2rem);
  align-items:start;
  margin-top:.4rem;
}

.rail{
  position:sticky;
  top:4.3rem;
  padding:1rem;
  border:1px solid var(--line);
  border-radius:24px 16px 26px 18px;
  background:rgba(244,238,232,.055);
}
.rail small{
  display:block;
  font-size:.7rem;
  letter-spacing:.24em;
  color:var(--ochre-soft);
}
.rail h2{
  margin:.2rem 0 .7rem;
  font-size:1.02rem;
  line-height:1.4;
}
.rail-list{
  display:flex;
  flex-direction:column;
  gap:.12rem;
  margin:0;
}
.rail-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:.4rem .62rem;
  border-radius:999px;
  font-size:.87rem;
  line-height:1.45;
  color:var(--muted);
  text-decoration:none;
  transition:background .2s ease,color .2s ease;
}
.rail-list a:hover{color:var(--cream);background:rgba(244,238,232,.09)}
.rail-list a.on{
  color:#fff;
  background:linear-gradient(140deg,rgba(86,34,139,.9),rgba(139,69,19,.9));
}

.flow{max-width:74ch}
.flow div{
  margin:0 0 1.4rem;
  padding:clamp(1rem,2.6vw,1.7rem);
  border:1px solid var(--line);
  border-radius:22px;
  background:linear-gradient(160deg,rgba(244,238,232,.075),rgba(244,238,232,.03));
  box-shadow:var(--shadow);
  transition:transform .25s ease;
}
.flow div:nth-child(3n+2){
  border-radius:14px 28px 18px 30px;
  background:linear-gradient(160deg,rgba(86,34,139,.2),rgba(244,238,232,.03));
}
.flow div:nth-child(3n){
  border-radius:30px 16px 32px 18px;
  background:linear-gradient(160deg,rgba(139,69,19,.2),rgba(244,238,232,.03));
}
.flow div[id]{scroll-margin-top:5.4rem}
.flow div.hit{outline:2px solid var(--ochre-soft);outline-offset:2px}

.flow h2{
  margin:0 0 .7rem;
  font-size:clamp(1.22rem,2.6vw,1.55rem);
  line-height:1.35;
  color:var(--cream);
}
.flow h3{
  margin:1.2rem 0 .5rem;
  font-size:1.08rem;
  line-height:1.4;
}
.flow p{margin:0 0 .9rem;color:#ded6e6}
.flow p:last-child{margin-bottom:0}
.flow ul,.flow ol{margin:0 0 .9rem;padding-left:1.25rem}
.flow li{margin:.32rem 0}
.flow a{
  color:var(--ochre-soft);
  text-decoration:underline;
  text-underline-offset:3px;
}
.flow strong{color:#fff}
.flow blockquote{
  margin:1rem 0;
  padding:.7rem 1rem;
  border-left:3px solid var(--purple-soft);
  border-radius:0 18px 18px 0;
  background:rgba(86,34,139,.22);
}
.flow blockquote p{margin:0}
.flow figure{margin:1rem 0}
.flow img{max-width:100%;height:auto;border-radius:18px}
.flow table{
  display:block;
  width:100%;
  overflow-x:auto;
  border-collapse:collapse;
  font-size:.95rem;
}
.flow th,.flow td{
  padding:.5rem .65rem;
  border-bottom:1px solid var(--line);
  text-align:left;
}

/* ---------- 页脚 ---------- */
footer{
  max-width:1220px;
  margin:2.6rem auto 0;
  padding:1.7rem clamp(.8rem,3vw,2rem) 2.6rem;
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:.4rem 1rem;
  border-top:1px solid var(--line);
}
footer div{margin:0}
footer div:first-child{
  font-size:clamp(2rem,7vw,3.6rem);
  font-weight:800;
  line-height:1;
  letter-spacing:-.02em;
  background:linear-gradient(100deg,var(--cream),var(--ochre-soft));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
footer div:last-child{font-size:.85rem;color:var(--muted)}

/* ---------- 窄屏 ---------- */
@media (max-width:820px){
  .masthead{
    grid-template-columns:1fr;
    justify-items:center;
    padding-top:.8rem;
  }
  .brand{order:-1;font-size:1.05rem}
  .menu{width:100%}
  .menu p,.menu-a p{justify-content:flex-start}
  .menu a{font-size:.9rem}
  .find input{width:6rem}
  .hero{
    grid-template-columns:1fr;
    min-height:0;
    padding-bottom:1.6rem;
    border-radius:28px 20px 30px 18px;
  }
  .hero-art{order:-1}
  .blob{width:min(74%,16rem)}
  .hero-copy{text-align:right}
  .shell{grid-template-columns:1fr}
  .rail{position:static}
  .rail-list{flex-direction:row;flex-wrap:wrap}
  .rail-list a{padding:.4rem .7rem;border:1px solid var(--line)}
  .flow{max-width:none}
  .flow div[id]{scroll-margin-top:4.8rem}
}

@media (max-width:420px){
  .subbar{gap:.4rem}
  .find{padding-left:.55rem}
  .find input{width:4.6rem}
  .chip{font-size:.8rem;padding:.4rem .68rem}
}

@media (hover:hover){
  .flow div:hover{transform:translateY(-2px)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .blob{animation:none}
  .flow div{transition:none}
  .flow div:hover{transform:none}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}

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