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

:root{
  --pink:#E4707E;
  --pink-soft:rgba(228,112,126,.18);
  --ink:#2B2430;
  --ink-2:#3c3342;
  --paper:#F7F1EC;
  --muted:#6d6476;
  --line:rgba(43,36,48,.16);
  --line-l:rgba(247,241,236,.16);
  --serif:"Noto Serif JP","Hiragino Mincho ProN","Songti SC",serif;
  --sans:"Noto Sans JP",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --r:10px;
  --top:58px;
}

*,*::before,*::after{box-sizing:border-box}
html{font-size:100%;scroll-behavior:smooth;overflow-x:clip;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.8;overflow-x:clip}
body::before{
  content:"";position:fixed;inset:-15% 0 0;z-index:-2;
  background:
    radial-gradient(58% 42% at 14% -6%,rgba(228,112,126,.26),transparent 66%),
    radial-gradient(46% 36% at 88% 8%,rgba(43,36,48,.14),transparent 62%),
    linear-gradient(180deg,#fdf8f4 0%,var(--paper) 42%,#f2eae3 100%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.45;
  background-image:radial-gradient(rgba(43,36,48,.22) .6px,transparent .6px);
  background-size:4px 4px;
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 26%,#000 74%,transparent);
  mask-image:linear-gradient(180deg,transparent,#000 26%,#000 74%,transparent);
}
a{color:var(--pink);text-decoration:none}
a:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--pink);outline-offset:3px}
figure{margin:0}
img{max-width:100%;height:auto}

.sky{position:fixed;inset:0;z-index:-3;pointer-events:none;
  background:radial-gradient(70% 40% at 50% 110%,rgba(228,112,126,.12),transparent 70%)}

/* 顶栏 */
.top{
  position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:.55rem;
  height:var(--top);padding:0 clamp(.7rem,3vw,1.5rem);
  background:rgba(247,241,236,.93);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.mark{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--r);background:var(--ink);color:var(--paper);
  font-family:var(--serif);font-weight:700;font-size:1.15rem;
}
.mark img{width:24px;height:24px;border-radius:6px;object-fit:cover;display:block}
.mark span{line-height:1}
.pop{position:relative;flex:0 0 auto}
.pop>summary{
  list-style:none;display:inline-flex;align-items:center;min-height:40px;padding:0 .72rem;
  border-radius:var(--r);background:#fff;border:1px solid var(--line);
  font-size:16px;cursor:pointer;color:var(--ink);
}
.pop>summary::-webkit-details-marker{display:none}
.pop[open]>summary{background:var(--pink);border-color:var(--pink);color:#fff}
.pop-body{
  position:absolute;left:0;top:calc(100% + 8px);width:min(80vw,290px);padding:.55rem;
  background:#fff;border-radius:var(--r);box-shadow:0 20px 44px rgba(43,36,48,.2);z-index:50;
}
.pop-body ol{margin:0;padding:0;list-style:none;display:grid;gap:2px}
.pop-body a{display:flex;align-items:center;min-height:40px;padding:0 .6rem;border-radius:8px;color:var(--ink);font-size:16px}
.pop-body a:hover{background:var(--paper)}
.find{flex:1 1 auto;min-width:0;display:flex}
.find input{
  width:100%;min-height:40px;padding:0 .8rem;font:inherit;font-size:16px;
  color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:var(--r);
}
.find input::placeholder{color:#a199a8}

/* 锚点条 */
.rail{
  position:sticky;top:var(--top);z-index:35;
  background:rgba(43,36,48,.96);border-bottom:1px solid var(--line-l);
}
.rail ol{
  display:flex;gap:.12rem;margin:0;padding:.3rem clamp(.45rem,3vw,1.25rem);
  list-style:none;overflow-x:auto;scrollbar-width:thin;
}
.rail a{
  display:inline-flex;align-items:center;min-height:40px;padding:0 .72rem;
  white-space:nowrap;color:#ece1da;font-size:16px;border-radius:8px;
}
.rail a:hover{background:rgba(228,112,126,.26);color:#fff}

/* 主体 */
main{
  display:grid;grid-template-columns:minmax(0,1fr) 16.5rem;column-gap:2.4rem;
  max-width:1180px;margin:0 auto;padding:0 clamp(.85rem,3vw,1.5rem) 3rem;
}
main>section{grid-column:1;scroll-margin-top:calc(var(--top) + 62px)}

.hero{
  grid-column:1 / -1;position:relative;isolation:isolate;overflow:hidden;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  margin-top:1.1rem;min-height:45vh;padding:2.2rem 3.4rem 3rem;text-align:center;
  border-radius:var(--r);color:var(--paper);
  background:radial-gradient(90% 100% at 50% -20%,#544455,var(--ink) 62%);
}
.hero-bg{
  position:absolute;inset:auto -6% -1.6rem;z-index:-1;display:grid;justify-items:center;
  font-family:var(--serif);font-weight:700;font-size:clamp(4rem,16vw,9rem);
  line-height:.84;color:rgba(247,241,236,.09);white-space:nowrap;will-change:transform;
}
.kicker{margin:0 0 .45rem;font-size:16px;letter-spacing:.16em;color:#f4b6be}
.hero h1{
  margin:0;font-family:var(--serif);font-weight:600;letter-spacing:.02em;
  font-size:clamp(1.65rem,5.2vw,2.85rem);line-height:1.36;
}
.seal{position:absolute;right:.85rem;bottom:.85rem;display:grid;justify-items:center;gap:.15rem}
.seal span{
  display:grid;place-items:center;width:52px;height:52px;border-radius:var(--r);
  background:var(--pink);color:#fff;font-family:var(--serif);font-size:1.5rem;font-weight:700;
  box-shadow:0 10px 26px rgba(228,112,126,.36);
}
.seal figcaption{font-size:16px;letter-spacing:.06em;color:#e6d6d1;text-align:center}

main>section:not(.hero){margin-top:2.6rem;padding-top:2.5rem;border-top:1px solid var(--line)}
main>section:not(.hero)>small,
main>section:not(.hero) p+small{
  display:block;font-size:16px;font-weight:500;letter-spacing:.2em;
  color:var(--pink);margin-bottom:.3rem;
}
main>section:not(.hero) h2{
  margin:0 0 .9rem;font-family:var(--serif);font-weight:600;line-height:1.45;
  font-size:clamp(1.32rem,3.4vw,1.8rem);
}
main>section:not(.hero) h3{
  margin:1.6rem 0 .6rem;font-family:var(--serif);font-weight:600;
  font-size:1.18rem;line-height:1.5;
}
main>section:not(.hero) p{margin:0 0 1.05rem}
main>section:not(.hero) ul,
main>section:not(.hero) ol{padding-left:1.25rem;margin:0 0 1.05rem}
main>section:not(.hero) li{margin:.25rem 0}
main>section:not(.hero) blockquote{
  margin:1.2rem 0;padding:1rem 1.1rem;border-radius:var(--r);
  background:#fff;font-family:var(--serif);line-height:1.75;
}
main>section:not(.hero) blockquote p:last-child{margin-bottom:0}
main>section:not(.hero) img{border-radius:var(--r);display:block;margin:1.1rem 0}
main>section:not(.hero) table{width:100%;border-collapse:collapse;font-size:16px}
main>section:not(.hero) th,
main>section:not(.hero) td{padding:.55rem .5rem;border-bottom:1px solid var(--line);text-align:left}

/* 侧栏 */
main>aside{grid-column:2;grid-row:2 / span 40;align-self:start;position:sticky;top:calc(var(--top) + 70px)}
.card{
  background:#fff;border-radius:var(--r);padding:1rem 1rem 1.15rem;
  box-shadow:0 16px 34px rgba(43,36,48,.08);
}
.card+.card{margin-top:.9rem}
.card>small{display:block;font-size:16px;letter-spacing:.2em;color:var(--pink)}
.card h2{margin:.1rem 0 .65rem;font-family:var(--serif);font-size:1.12rem;font-weight:600;line-height:1.4}
.toc{margin:0;padding:0;list-style:none;display:grid;gap:1px;counter-reset:toc}
.toc a{
  display:flex;gap:.5rem;align-items:baseline;min-height:40px;padding:.35rem .45rem;
  border-radius:8px;color:var(--ink);font-size:16px;line-height:1.45;
}
.toc a::before{
  counter-increment:toc;content:counter(toc,decimal-leading-zero);
  font-family:var(--serif);font-size:16px;color:var(--pink);
}
.toc a:hover{background:var(--paper)}
.kw{margin:0;font-size:16px;line-height:1.6;color:var(--muted);word-break:break-word}
.back{
  display:inline-flex;align-items:center;min-height:44px;margin-top:.9rem;padding:0 1rem;
  border-radius:var(--r);background:var(--pink);color:#fff;font-size:16px;
}

/* 页脚 */
footer{margin-top:3.6rem;background:var(--ink);color:#ece0da;padding:2.3rem clamp(.9rem,3vw,1.5rem) 1.4rem}
.cta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem;
  max-width:1120px;margin:0 auto 1.9rem;padding-bottom:1.5rem;border-bottom:1px solid var(--line-l);
}
.cta-word{margin:0;font-family:var(--serif);font-weight:600;letter-spacing:.03em;
  font-size:clamp(1.5rem,6vw,2.5rem);color:var(--paper)}
.cta-btn{
  display:inline-flex;align-items:center;min-height:44px;padding:0 1.25rem;
  border-radius:var(--r);background:var(--pink);color:#fff;font-size:16px;
}
.foot{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1.4rem;max-width:1120px;margin:0 auto}
.fcol small{display:block;font-size:16px;letter-spacing:.18em;color:#f4b6be;margin-bottom:.45rem}
.fcol ul{margin:0;padding:0;list-style:none;display:grid;gap:1px}
.fcol a{display:inline-flex;align-items:center;min-height:40px;font-size:16px;color:#e4d8d2}
.fcol a:hover{color:#fff}
.f-brand{margin:0 0 .35rem;font-family:var(--serif);font-size:1.12rem;color:var(--paper);line-height:1.5}
address{font-style:normal;font-size:16px;color:#b9adb8;word-break:break-all;line-height:1.6}
.copy{
  max-width:1120px;margin:1.7rem auto 0;padding-top:1rem;
  border-top:1px solid rgba(247,241,236,.12);font-size:16px;color:#a99da9;
}

/* 动效 */
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.72,.3,1)}
.rv.in{opacity:1;transform:none}

@media (max-width:880px){
  main{grid-template-columns:minmax(0,1fr);column-gap:0}
  main>aside{grid-column:1;grid-row:auto;position:static;margin-top:2.4rem}
  .foot{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero{padding:2rem 1.2rem 3.4rem}
}
@media (max-width:420px){
  .seal{right:.7rem;bottom:.7rem}
  .seal figcaption{display:none}
  .cta{gap:.8rem}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
}

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