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

:root{
  --paper:#ffffff;
  --tint:#f5f5f5;
  --ink:#1f1f1f;
  --mute:#5f5f5f;
  --line:#e4e4e4;
  --serif:'Lora','Songti SC','Noto Serif CJK SC',Georgia,serif;
  --sans:'Raleway','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;border-radius:0}
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:1.78;font-weight:400;
  padding-bottom:104px;overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.22;letter-spacing:-0.01em;margin:0}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;background:var(--paper);
  min-height:100vh;min-height:100svh;
  display:grid;grid-template-columns:1fr;align-content:start;
  gap:26px;padding:84px 20px 44px;
}
.hero-mark{
  position:absolute;left:-0.06em;top:4%;z-index:0;pointer-events:none;
  font-family:var(--serif);font-weight:700;white-space:nowrap;
  font-size:clamp(70px,24vw,240px);line-height:1;letter-spacing:-0.05em;color:#f0f0f0;
}
.hero-copy{position:relative;z-index:1;max-width:38ch}
.hero-copy h1{font-size:clamp(31px,8.2vw,74px);line-height:1.14}
.hero-lead{margin:18px 0 0;color:var(--mute);font-size:17px;max-width:34ch}
.hero-go{
  display:inline-flex;align-items:center;min-height:46px;margin-top:24px;
  padding:0 24px;background:var(--ink);color:#fff;font-size:16px;letter-spacing:0.08em;
  transition:background .25s ease,transform .25s ease;
}
.hero-go:hover{background:#000;transform:translateY(-2px)}
.hero-media{position:relative;z-index:1;min-height:220px;background:var(--tint)}
.hero-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}

@media (min-width:900px){
  .hero{grid-template-columns:1.04fr 0.96fr;align-items:center;align-content:center;gap:44px;padding:120px 48px 56px}
  .hero-media img{aspect-ratio:auto;height:min(70vh,600px)}
  .hero-mark{top:50%;transform:translateY(-50%);left:-0.08em}
}

/* ---------- stage ---------- */
.stage{
  display:grid;grid-template-columns:1fr;gap:16px;
  max-width:1280px;margin:0 auto;padding:0 20px 44px;
}
.body{display:grid;grid-template-columns:1fr;gap:16px}
.body > section{background:var(--tint);padding:26px 20px;transition:transform .35s ease}
.body > section:nth-child(4n+1){background:var(--paper)}
.body section[id],.body [id]{scroll-margin-top:26px;scroll-margin-bottom:118px}
.body h2{font-size:clamp(23px,4.4vw,34px);margin:0 0 14px}
.body h3{font-size:20px;margin:26px 0 10px}
.body p{margin:0 0 16px}
.body ul,.body ol{margin:0 0 18px;padding-left:1.25em}
.body li{margin:0 0 8px}
.body a{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.body a:hover{color:#000;background:#ececec}
.body blockquote{margin:20px 0;padding:4px 0 4px 18px;border-left:3px solid var(--ink);font-family:var(--serif);font-size:19px;color:#333}
.body figure{margin:18px 0}
.body table{width:100%;border-collapse:collapse;font-size:16px}
.body th,.body td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.body small{display:block;font-size:14px;letter-spacing:0.18em;color:var(--mute);margin-bottom:10px}
.body hr{border:0;border-top:1px solid var(--line);margin:24px 0}

@media (min-width:820px){
  .body{grid-template-columns:repeat(2,minmax(0,1fr))}
  .body > section{grid-column:span 2;padding:42px 38px}
  .body > section:nth-child(4n+2),.body > section:nth-child(4n+3){grid-column:span 1}
}
@media (hover:hover){
  .body > section:hover{transform:translateY(-3px)}
}

/* ---------- rail ---------- */
.rail{background:var(--ink);color:#fff;padding:26px 20px}
.rail small{display:block;font-size:14px;letter-spacing:0.2em;color:#a8a8a8;margin-bottom:8px}
.rail h2{font-size:22px;color:#fff;margin:0 0 16px;letter-spacing:0.03em}
.rail-list{list-style:none;margin:0;padding:0;counter-reset:rail}
.rail-list li{counter-increment:rail;border-top:1px solid #3a3a3a}
.rail-list li:first-child{border-top:0}
.rail-list a{
  display:flex;align-items:center;gap:10px;min-height:46px;padding:2px 0;
  font-size:16px;color:#ededed;transition:color .2s ease,padding-left .2s ease;
}
.rail-list a::before{
  content:counter(rail,decimal-leading-zero);font-family:var(--serif);
  font-size:13px;color:#8c8c8c;min-width:1.6em;
}
.rail-list a:hover{color:#fff;padding-left:5px}
@media (min-width:1000px){
  .stage{grid-template-columns:minmax(0,1fr) 292px;align-items:start;gap:24px;padding:0 48px 72px}
  .rail{position:sticky;top:24px}
}

/* ---------- footer ---------- */
.base{
  display:grid;grid-template-columns:1fr;gap:12px;align-items:center;
  max-width:1280px;margin:0 auto;padding:52px 20px 34px;border-top:1px solid var(--line);
}
.base-cta{grid-column:1/-1;margin:0 0 16px;font-family:var(--serif);font-size:clamp(29px,6.4vw,56px);line-height:1.1}
.base-cta a{display:inline-block;min-height:46px;padding:4px 0;transition:color .25s ease}
.base-cta a:hover{color:var(--mute)}
.base-brand{margin:0;font-size:16px;font-weight:600}
.base-brand a{display:inline-flex;align-items:center;min-height:44px}
.base-copy{font-size:14px;color:var(--mute)}
.base-note{font-size:14px;color:var(--mute)}
@media (min-width:760px){
  .base{grid-template-columns:1fr auto 1fr;padding:72px 48px 44px}
  .base-copy{text-align:center}
  .base-note{text-align:right}
}

/* ---------- dock ---------- */
.dock{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;
  padding:8px 12px calc(8px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,0.97);border-top:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.dock-side{display:flex;gap:6px;justify-content:flex-start;min-width:0}
.dock-side-end{justify-content:flex-end}
.dock-brand{
  justify-self:center;display:flex;align-items:center;min-height:44px;
  font-family:var(--serif);font-size:17px;font-weight:600;letter-spacing:0.04em;white-space:nowrap;
}
.dock-tel{
  display:flex;align-items:center;min-height:44px;padding:0 12px;
  font-size:15px;letter-spacing:0.06em;background:var(--tint);
}
.dock-tel:hover{background:#eaeaea}
.dock-menu{position:relative;min-width:0}
.dock-menu > summary{
  position:relative;z-index:2;list-style:none;display:flex;align-items:center;
  min-height:44px;padding:0 12px;cursor:pointer;font-size:15px;letter-spacing:0.06em;
  background:var(--tint);transition:background .2s ease;
}
.dock-menu > summary::-webkit-details-marker{display:none}
.dock-menu > summary:hover{background:#eaeaea}
.dock-menu[open] > summary{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.dock-menu > menu{display:none;margin:0;padding:0;list-style:none}
.dock-menu[open] > menu{
  display:grid;position:fixed;left:0;right:0;top:0;z-index:1;
  height:100vh;height:100svh;overflow:auto;align-content:start;
  padding:64px 22px calc(104px + env(safe-area-inset-bottom));
  background:var(--ink);color:#fff;
  animation:sheetIn .26s ease both;
}
.dock-menu[open] > menu li{border-bottom:1px solid #3a3a3a}
.dock-menu[open] > menu a{
  display:flex;align-items:center;min-height:58px;
  font-family:var(--serif);font-size:20px;letter-spacing:0.02em;color:#fff;
}
.dock-menu[open] > menu a:hover{color:#b6b6b6}
@keyframes sheetIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}

/* ---------- reveal ---------- */
html.js .reveal{opacity:0;transform:translateY(16px)}
html.js .reveal.in{opacity:1;transform:none;transition:opacity .6s ease,transform .6s ease}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js .reveal{opacity:1;transform:none;transition:none}
  .dock-menu[open] > menu{animation:none}
  .body > section,.hero-go,.rail-list a{transition:none}
  .body > section:hover{transform:none}
}

@media (min-width:1100px){
  body{font-size:18px}
  .hero-copy h1{letter-spacing:-0.02em}
}

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