:root{
  --paper:#f5f3ef; --ink:#14140f; --mute:#6f6b62; --line:#dedad2;
  --accent:#c8452a; --side:280px;
  --sans:"Hiragino Sans","Yu Gothic","Noto Sans JP","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --serif:"Hiragino Mincho ProN","Yu Mincho","Noto Serif JP","Songti SC",serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.9;
  -webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
html[data-lang="ja"] [lang="zh"],html[data-lang="zh"] [lang="ja"]{display:none!important}

/* ---------- 左侧固定栏（原站是顶部横导航，这里换成竖排） ---------- */
.side{position:fixed;inset:0 auto 0 0;width:var(--side);padding:40px 32px;
  display:flex;flex-direction:column;gap:48px;border-right:1px solid var(--line);background:var(--paper);z-index:20}
.brand{display:flex;align-items:center;gap:12px}
.brand svg{width:34px;height:34px;flex:none}
.brand b{font-size:18px;letter-spacing:.34em;font-weight:600}
.brand small{display:block;font-size:9px;letter-spacing:.18em;color:var(--mute);font-weight:400}
.side nav{display:flex;flex-direction:column;gap:2px;flex:1}
.side nav a{padding:9px 0;font-size:13px;letter-spacing:.08em;color:var(--mute);
  display:flex;align-items:baseline;gap:12px;transition:color .25s}
.side nav a em{font-style:normal;font-size:10px;color:var(--line);font-variant-numeric:tabular-nums}
.side nav a:hover,.side nav a[aria-current]{color:var(--ink)}
.side nav a[aria-current] em{color:var(--accent)}
.lang{display:flex;gap:8px;font-size:11px;letter-spacing:.1em;color:var(--mute)}
.lang button{background:none;border:0;font:inherit;color:inherit;cursor:pointer;padding:4px 0}
.lang button[aria-pressed="true"]{color:var(--ink);border-bottom:1px solid var(--accent)}
.side .cta{display:inline-block;border:1px solid var(--ink);padding:10px 0;text-align:center;
  font-size:12px;letter-spacing:.14em;transition:.25s}
.side .cta:hover{background:var(--ink);color:var(--paper)}

main{margin-left:var(--side)}
.wrap{padding:0 clamp(24px,6vw,96px)}
section{padding:clamp(72px,10vw,140px) 0;border-bottom:1px solid var(--line)}

/* ---------- 区块标题 ---------- */
.eyebrow{font-size:10px;letter-spacing:.32em;color:var(--accent);margin-bottom:18px}
h2{font-family:var(--serif);font-size:clamp(26px,3.4vw,40px);font-weight:500;line-height:1.45;letter-spacing:.02em}
h3{font-family:var(--serif);font-size:20px;font-weight:500;line-height:1.6}
p{color:var(--mute)}

/* ---------- Hero：左右不对称分割 ---------- */
.hero{display:grid;grid-template-columns:1fr .82fr;min-height:100vh;border-bottom:1px solid var(--line)}
.hero-txt{display:flex;flex-direction:column;justify-content:center;padding:0 clamp(24px,5vw,80px)}
.hero-txt h1{font-family:var(--serif);font-weight:500;font-size:clamp(34px,4.6vw,62px);line-height:1.35;letter-spacing:.03em}
.hero-txt h1 span{display:block}
.hero-txt h1 span:nth-child(2){padding-left:1.6em}
.hero-txt h1 i{font-style:normal;color:var(--accent)}
.hero-txt p{margin-top:32px;max-width:34em}
.hero-meta{margin-top:56px;display:flex;gap:36px;font-size:11px;letter-spacing:.14em;color:var(--mute)}
.hero-img{background:#22221c center/cover no-repeat;position:relative}
.hero-img::after{content:"";position:absolute;inset:0;
  background:linear-gradient(140deg,rgba(200,69,42,.28),transparent 55%)}
.hero-img.empty{background-image:
  repeating-linear-gradient(135deg,#26261f 0 22px,#2c2c24 22px 44px)}

/* ---------- 数字条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}
.stats div{padding:44px clamp(16px,3vw,40px);border-left:1px solid var(--line)}
.stats div:first-child{border-left:0}
.stats b{font-family:var(--serif);font-size:clamp(30px,3.6vw,46px);font-weight:500;display:block;line-height:1.1}
.stats b sup{font-size:.4em;color:var(--accent);vertical-align:super}
.stats span{font-size:11px;letter-spacing:.14em;color:var(--mute)}

/* ---------- 解决方案：非对称网格 ---------- */
.sol{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:56px}
.sol a{background:var(--paper);padding:38px 32px 46px;min-height:230px;
  display:flex;flex-direction:column;gap:14px;transition:background .3s}
.sol a:hover{background:#efece6}
.sol a:nth-child(1){grid-column:span 3}
.sol a:nth-child(2){grid-column:span 3}
.sol a:nth-child(3),.sol a:nth-child(4),.sol a:nth-child(5){grid-column:span 2}
.sol em{font-style:normal;font-size:10px;letter-spacing:.2em;color:var(--accent)}
.sol p{font-size:13px;margin-top:auto}

/* ---------- 两栏文本 ---------- */
.split{display:grid;grid-template-columns:.9fr 1.4fr;gap:clamp(32px,6vw,90px);align-items:start}
.news li{border-top:1px solid var(--line);padding:20px 0;display:grid;
  grid-template-columns:110px 90px 1fr;gap:16px;align-items:baseline;list-style:none;font-size:14px}
.news li:last-child{border-bottom:1px solid var(--line)}
.news time{font-size:11px;letter-spacing:.1em;color:var(--mute);font-variant-numeric:tabular-nums}
.news .tag{font-size:10px;letter-spacing:.12em;border:1px solid var(--line);padding:2px 8px;color:var(--mute);text-align:center}
.news a:hover{color:var(--accent)}

/* ---------- 会社概要 ---------- */
.page-head{padding:clamp(90px,12vw,170px) 0 clamp(40px,6vw,70px)}
.page-head h1{font-family:var(--serif);font-size:clamp(34px,5vw,60px);font-weight:500;letter-spacing:.04em}
.page-head .lead{margin-top:22px;font-size:16px;max-width:36em}
.cover{height:clamp(220px,32vw,420px);background:#22221c center/cover no-repeat;
  background-image:repeating-linear-gradient(135deg,#26261f 0 22px,#2c2c24 22px 44px)}
.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th,.tbl td{border-top:1px solid var(--line);padding:18px 0;text-align:left;vertical-align:top}
.tbl tr:last-child th,.tbl tr:last-child td{border-bottom:1px solid var(--line)}
.tbl th{width:190px;font-weight:400;letter-spacing:.1em;font-size:12px;color:var(--mute)}
.block{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center;margin-top:64px}
.block:nth-child(even) .block-img{order:-1}
.block-img{aspect-ratio:4/3;background:#22221c center/cover no-repeat;
  background-image:repeating-linear-gradient(135deg,#26261f 0 22px,#2c2c24 22px 44px)}
.block p{margin-top:16px;white-space:pre-line}
.hist{margin-top:48px}
.hist li{list-style:none;display:grid;grid-template-columns:120px 1fr;gap:24px;
  border-top:1px solid var(--line);padding:20px 0}
.hist li:last-child{border-bottom:1px solid var(--line)}
.hist b{font-family:var(--serif);font-size:20px;font-weight:500;color:var(--accent)}
.hist span{color:var(--mute);font-size:14px}

footer{padding:56px clamp(24px,6vw,96px);display:flex;justify-content:space-between;
  gap:24px;flex-wrap:wrap;font-size:11px;letter-spacing:.1em;color:var(--mute)}

/* ---------- 管理后台 ---------- */
.admin{max-width:900px;margin:0 auto;padding:48px 24px 120px}
.admin h1{font-family:var(--serif);font-size:28px;font-weight:500;margin-bottom:8px}
.admin fieldset{border:1px solid var(--line);padding:24px;margin-top:24px}
.admin legend{font-size:11px;letter-spacing:.2em;color:var(--accent);padding:0 8px}
.admin label{display:block;font-size:11px;letter-spacing:.12em;color:var(--mute);margin:16px 0 6px}
.admin input,.admin textarea{width:100%;font:inherit;font-size:14px;padding:10px 12px;
  border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:2px}
.admin textarea{min-height:90px;resize:vertical;line-height:1.7}
.admin input:focus,.admin textarea:focus{outline:1px solid var(--accent);border-color:var(--accent)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.item{border:1px dashed var(--line);padding:16px;margin-top:16px;position:relative;background:#fbfaf8}
.btn{font:inherit;font-size:12px;letter-spacing:.1em;padding:9px 18px;border:1px solid var(--ink);
  background:none;color:var(--ink);cursor:pointer;border-radius:2px;transition:.2s}
.btn:hover{background:var(--ink);color:var(--paper)}
.btn.sm{padding:5px 12px;font-size:11px;border-color:var(--line)}
.btn.danger{border-color:#d9c3bd;color:var(--accent)}
.bar{position:sticky;top:0;background:var(--paper);border-bottom:1px solid var(--line);
  padding:14px 24px;display:flex;gap:12px;align-items:center;z-index:5}
.bar .msg{font-size:12px;color:var(--mute);margin-left:auto}
.thumb{width:100%;max-width:220px;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line);margin-top:8px;background:#eee}

@media(max-width:900px){
  :root{--side:0px}
  .side{position:sticky;inset:0 0 auto 0;width:100%;flex-direction:row;align-items:center;
    gap:20px;padding:14px 20px;border-right:0;border-bottom:1px solid var(--line);overflow-x:auto}
  .side nav{flex-direction:row;gap:16px;flex:none}
  .side nav a em,.side .cta{display:none}
  .hero,.split,.block,.row{grid-template-columns:1fr}
  .hero{min-height:auto}
  .hero-txt{padding:64px 24px}
  .hero-img{height:56vw}
  .stats{grid-template-columns:1fr 1fr}
  .stats div:nth-child(3){border-left:0}
  .stats div:nth-child(n+3){border-top:1px solid var(--line)}
  .sol a{grid-column:span 6!important}
  .block:nth-child(even) .block-img{order:0}
  .news li{grid-template-columns:1fr;gap:4px}
  .tbl th{width:auto;display:block;padding-bottom:0;border-bottom:0}
  .tbl td{display:block;border-top:0;padding-top:4px}
  .tbl tr:last-child td{border-bottom:1px solid var(--line)}
  .hist li{grid-template-columns:70px 1fr;gap:12px}
}

/* ---------- 前台内联编辑 ---------- */
.ed-bar{position:fixed;right:22px;bottom:22px;z-index:60;display:flex;gap:8px;align-items:center;
  background:var(--paper);border:1px solid var(--line);padding:10px 14px;box-shadow:0 8px 30px rgba(0,0,0,.1)}
.ed-bar button{font:inherit;font-size:12px;letter-spacing:.1em;padding:8px 16px;cursor:pointer;
  border:1px solid var(--ink);background:none;color:var(--ink);transition:.2s}
.ed-bar button:hover{background:var(--ink);color:var(--paper)}
.ed-bar #edMsg{font-size:11px;color:var(--mute);max-width:15em}
.editing [data-p]{outline:1px dashed rgba(200,69,42,.5);outline-offset:4px;min-width:1.5em}
.editing [data-p]:focus{outline:1px solid var(--accent);background:#fff}
.editing [data-img]{cursor:pointer;box-shadow:inset 0 0 0 2px var(--accent)}
.ed-add,.ed-del{display:none;font:inherit;font-size:11px;letter-spacing:.1em;cursor:pointer;
  border:1px solid var(--line);background:var(--paper);color:var(--accent);padding:4px 10px;margin-left:10px}
.editing .ed-add{display:inline-block;margin:20px 0 0}
.editing .ed-del{display:inline-block}
#intro,.tbl td,.hist span{white-space:pre-line}