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

:root{
  --ink:#1f1f1f;
  --paper:#ffffff;
  --mist:#f5f5f5;
  --line:#e6e6e6;
  --mute:#8a8a8a;
  --serif:'Playfair Display','Songti SC','Noto Serif SC',Georgia,serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --e1:0 1px 2px rgba(31,31,31,.05),0 2px 6px rgba(31,31,31,.05);
  --e2:0 3px 8px rgba(31,31,31,.06),0 10px 22px rgba(31,31,31,.06);
  --e3:0 8px 20px rgba(31,31,31,.08),0 22px 44px rgba(31,31,31,.07);
  --e4:0 16px 38px rgba(31,31,31,.11),0 40px 76px rgba(31,31,31,.1);
  --radius:10px;
  --wrap:1180px;
}

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

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

body{
  margin:0;
  overflow-x:hidden;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:1.0625rem;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

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

a:focus-visible,
button:focus-visible{
  outline:2px solid var(--ink);
  outline-offset:3px;
}

/* ---------- 页头：品牌独占一行 + 药丸菜单 ---------- */
.masthead{
  max-width:var(--wrap);
  margin-inline:auto;
  padding:clamp(1.1rem,3vw,2rem) clamp(1rem,4vw,2.5rem) 1rem;
  position:relative;
  z-index:20;
}

.brand-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  min-height:44px;
  color:var(--ink);
  text-decoration:none;
}

.brand-mark{
  width:34px;
  height:34px;
  border-radius:8px;
  object-fit:cover;
  box-shadow:var(--e1);
}

.brand-name{
  font-family:var(--serif);
  font-size:1.35rem;
  font-weight:600;
  letter-spacing:.01em;
}

.pills{
  display:flex;
  flex-wrap:wrap;
  gap:.45rem;
  margin-top:.95rem;
}

.pill{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:.6rem 1.1rem;
  border-radius:999px;
  background:var(--mist);
  color:var(--ink);
  font-size:1rem;
  line-height:1.2;
  text-decoration:none;
  box-shadow:var(--e1);
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease;
}

.pill:hover{
  background:var(--paper);
  box-shadow:var(--e2);
  transform:translateY(-2px);
}

/* ---------- 主区：左栏 + 内容列 ---------- */
main{
  max-width:var(--wrap);
  margin-inline:auto;
  padding:clamp(1.2rem,3vw,2.2rem) clamp(1rem,4vw,2.5rem) 0;
}

.story{
  position:relative;
  display:grid;
  grid-template-columns:minmax(140px,190px) minmax(0,1fr);
  column-gap:clamp(1rem,3vw,2.4rem);
  align-items:start;
  padding-bottom:1.5rem;
}

/* ---------- 左侧栏 ---------- */
.rail{
  grid-column:1;
  grid-row:1 / span var(--rail-span,12);
  position:sticky;
  top:1.4rem;
  align-self:start;
  z-index:8;
}

.rail-kicker{
  display:block;
  font-size:.74rem;
  letter-spacing:.22em;
  color:var(--mute);
  margin-bottom:.25rem;
}

.rail-title{
  font-family:var(--serif);
  font-size:1.2rem;
  font-weight:600;
  margin:0 0 .8rem;
  line-height:1.3;
}

.rail-nav{
  display:flex;
  flex-direction:column;
  gap:.12rem;
  border-left:1px solid var(--line);
  padding-left:.7rem;
}

.rail-link{
  display:flex;
  align-items:center;
  gap:.5rem;
  min-height:40px;
  padding:.15rem .2rem;
  border-radius:6px;
  color:var(--ink);
  font-size:1rem;
  line-height:1.35;
  text-decoration:none;
  transition:background .2s ease,color .2s ease;
}

.rail-link:hover{background:var(--mist)}

.rail-num{
  font-size:.76rem;
  color:var(--mute);
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
}

/* ---------- 首屏 ---------- */
.hero{
  grid-column:2;
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  align-items:center;
  gap:clamp(1rem,3vw,2.4rem);
  min-height:70vh;
  padding:clamp(.8rem,2.5vw,1.6rem) 0 clamp(2.2rem,5vw,3.6rem);
}

.hero-ghost{
  position:absolute;
  top:-.7rem;
  left:-.5rem;
  z-index:0;
  font-family:var(--serif);
  font-size:clamp(6rem,17vw,14rem);
  line-height:.8;
  letter-spacing:-.05em;
  color:var(--mist);
  pointer-events:none;
  will-change:transform;
}

.hero-copy{
  position:relative;
  z-index:2;
}

.hero-h1{
  font-family:var(--serif);
  font-size:clamp(1.9rem,4.4vw,3.1rem);
  line-height:1.2;
  font-weight:600;
  margin:0 0 1rem;
}

.hero-lead{
  margin:0;
  max-width:34rem;
  color:#4a4a4a;
  font-size:1.0625rem;
}

.hero-art{
  position:relative;
  z-index:1;
  min-height:18rem;
  border-radius:var(--radius);
  background:linear-gradient(150deg,#f5f5f5 0%,#ffffff 72%);
  box-shadow:var(--e3);
  will-change:transform;
}

.hero-img{
  position:relative;
  z-index:1;
  width:100%;
  border-radius:var(--radius);
  box-shadow:var(--e4);
}

.hero-cta{
  position:absolute;
  left:-1rem;
  bottom:1rem;
  z-index:3;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.6rem 1.35rem;
  border-radius:999px;
  border:1px solid rgba(31,31,31,.06);
  background:rgba(255,255,255,.78);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  color:var(--ink);
  font-size:1rem;
  text-decoration:none;
  box-shadow:var(--e3);
  transition:transform .2s ease,background .2s ease;
}

.hero-cta:hover{
  background:#fff;
  transform:translateY(-2px);
}

/* ---------- 正文分区：叠层浮卡 ---------- */
.story > div{
  grid-column:2;
  position:relative;
  background:var(--paper);
  border-radius:var(--radius);
  box-shadow:var(--e2);
  padding:clamp(1.4rem,3vw,2.4rem);
  padding-bottom:clamp(2.6rem,5vw,3.8rem);
  scroll-margin-top:1.5rem;
}

.story > div + div{margin-top:-1.5rem}
.story > div:nth-of-type(1){z-index:1}
.story > div:nth-of-type(2){z-index:2}
.story > div:nth-of-type(3){z-index:3}
.story > div:nth-of-type(4){z-index:4}
.story > div:nth-of-type(5){z-index:5}
.story > div:nth-of-type(6){z-index:6}
.story > div:nth-of-type(7){z-index:7}
.story > div:nth-of-type(8){z-index:8}
.story > div:nth-of-type(n+9){z-index:9}

/* ---------- 正文排版 ---------- */
.story h2{
  font-family:var(--serif);
  font-size:clamp(1.45rem,2.6vw,1.95rem);
  line-height:1.3;
  font-weight:600;
  letter-spacing:.01em;
  margin:0 0 .9rem;
}

.story h3{
  font-family:var(--serif);
  font-size:1.25rem;
  font-weight:600;
  margin:1.7rem 0 .6rem;
}

.story small{
  display:block;
  font-size:.76rem;
  letter-spacing:.2em;
  color:var(--mute);
  margin-bottom:.3rem;
}

.story p{margin:0 0 1.15rem}
.story p:last-child{margin-bottom:0}
.story ul,.story ol{padding-left:1.35rem;margin:0 0 1.2rem}
.story li{margin-bottom:.45rem}
.story strong{font-weight:600}

.story a{
  color:var(--ink);
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:4px;
}

.story a:hover{background:var(--mist)}

.story blockquote{
  margin:1.4rem 0;
  padding:1rem 1.2rem;
  background:var(--mist);
  border-radius:var(--radius);
  box-shadow:var(--e1);
}

.story blockquote p:last-child{margin-bottom:0}

.story img{margin:1.2rem 0;border-radius:var(--radius);box-shadow:var(--e2)}

.story table{width:100%;border-collapse:collapse;margin:1rem 0}
.story th,.story td{padding:.6rem .7rem;border-bottom:1px solid var(--line);text-align:left}

/* ---------- 页脚：单行三区 ---------- */
.foot{
  max-width:var(--wrap);
  margin:clamp(2.5rem,6vw,4.5rem) auto 0;
  padding:clamp(1.6rem,4vw,2.6rem) clamp(1rem,4vw,2.5rem) 2.6rem;
  border-top:1px solid var(--line);
  display:grid;
  grid-template-columns:minmax(0,1fr) auto auto;
  gap:1.5rem clamp(1.5rem,4vw,3rem);
  align-items:start;
}

.foot-mark{
  display:inline-block;
  font-family:var(--serif);
  font-size:clamp(1.8rem,4vw,3rem);
  line-height:1.05;
  font-weight:600;
  letter-spacing:-.01em;
  color:var(--ink);
  text-decoration:none;
}

.foot-nav dl{
  display:grid;
  grid-template-columns:2rem minmax(0,1fr);
  gap:.1rem .55rem;
  margin:0;
}

.foot-nav dt{
  padding-top:.9rem;
  font-size:.78rem;
  color:var(--mute);
  font-variant-numeric:tabular-nums;
}

.foot-nav dd{margin:0}

.foot-nav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:1rem;
  color:var(--ink);
  text-decoration:none;
  transition:color .2s ease;
}

.foot-nav a:hover{
  text-decoration:underline;
  text-underline-offset:4px;
}

.foot-legal{
  padding-top:.45rem;
  font-size:.95rem;
  color:var(--mute);
  text-align:right;
}

.foot-legal p{margin:0}

/* ---------- 动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .7s cubic-bezier(.22,.7,.3,1),transform .7s cubic-bezier(.22,.7,.3,1);
}

.reveal.in{
  opacity:1;
  transform:none;
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .pill:hover,.hero-cta:hover{transform:none}
}

/* ---------- 窄屏 ---------- */
@media (max-width:900px){
  .pill{min-height:40px;padding:.5rem .9rem;font-size:.95rem}

  .story{display:block}

  .rail{
    position:static;
    margin:0 0 1.4rem;
  }

  .rail-nav{
    flex-direction:row;
    overflow-x:auto;
    gap:.4rem;
    border-left:0;
    border-top:1px solid var(--line);
    padding:.55rem 0 0;
    -webkit-overflow-scrolling:touch;
  }

  .rail-link{
    flex:0 0 auto;
    min-height:40px;
    padding:.35rem .8rem;
    border-radius:999px;
    background:var(--mist);
    box-shadow:var(--e1);
    font-size:.95rem;
    white-space:nowrap;
  }

  .rail-num{display:none}

  .hero{
    grid-template-columns:1fr;
    min-height:0;
    padding-bottom:2.4rem;
  }

  .hero-ghost{
    top:auto;
    bottom:1rem;
    left:auto;
    right:.2rem;
    font-size:clamp(5rem,26vw,9rem);
  }

  .hero-art{
    min-height:14rem;
    margin-bottom:.9rem;
  }

  .hero-cta{left:.9rem;bottom:.9rem}

  .story > div + div{margin-top:-.9rem}

  .foot{grid-template-columns:1fr;gap:1.3rem}
  .foot-legal{text-align:left;padding-top:0}
}

@media (max-width:420px){
  .hero-h1{font-size:1.8rem}
  .story > div{padding:1.2rem;padding-bottom:2.4rem}
}

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