:root{
  --ink:#101917;--paper:#f4f1ea;--copper:#c2a06a;--copper-dark:#8a6d3b;
  --line:rgba(194,160,106,.30);--line-dark:rgba(27,36,33,.16);
  --light:#f2efe8;--light-mid:#c3ccc6;--muted:#9aa8a2;--muted-dark:#6d7570;--dark-text:#1b2421;
  --serif:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC",Georgia,serif;
  --sans:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--ink);color:var(--light);font-family:var(--sans);line-height:1.85;-webkit-font-smoothing:antialiased;overflow-x:hidden}
html[data-lang="zh"] .en{display:none}html[data-lang="en"] .zh{display:none}
a{color:inherit}.shell{width:min(1180px,90%);margin:0 auto}

.masthead{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding:36px 0 26px;border-bottom:1px solid var(--line)}
.wordmark{display:flex;flex-direction:column;gap:8px;text-decoration:none}
.wm-latin{font-family:var(--serif);font-size:clamp(28px,4vw,42px);letter-spacing:.22em;line-height:1;color:var(--copper)}
@supports ((-webkit-background-clip:text) or (background-clip:text)){.wm-latin{background:linear-gradient(100deg,#e8d6ad,#b8935a 45%,#f0e2c2 70%,#a9824c);-webkit-background-clip:text;background-clip:text;color:transparent}}
.wm-cn{font-size:11px;letter-spacing:.30em;color:var(--muted)}
.masthead-right{display:flex;align-items:center;gap:22px}
.est{font-size:11px;letter-spacing:.22em;color:var(--copper)}
.lang{background:none;border:1px solid var(--line);color:var(--copper);padding:8px 16px;font-size:12px;letter-spacing:.18em;cursor:pointer;font-family:var(--sans);transition:.25s}
.lang:hover{background:rgba(194,160,106,.12);border-color:var(--copper)}

.hero{display:grid;grid-template-columns:1fr auto;gap:56px;align-items:end;padding:100px 0 108px;position:relative}
.hero::before{content:"";position:absolute;left:-38px;top:96px;bottom:108px;width:1px;background:linear-gradient(180deg,transparent,var(--copper),transparent)}
.kicker{font-size:11px;letter-spacing:.34em;color:var(--copper);margin:0 0 34px}
.hero h1{font-family:var(--serif);font-weight:400;font-size:clamp(38px,6.2vw,74px);line-height:1.36;letter-spacing:.04em;margin:0}
.hero-rule{width:88px;height:1px;background:var(--copper);margin:38px 0 30px}
.hero-lead{max-width:620px;font-size:16px;color:var(--light-mid);margin:0 0 30px}
.text-link{display:inline-block;font-size:13px;letter-spacing:.14em;color:var(--copper);text-decoration:none;border-bottom:1px solid var(--line);padding-bottom:6px}
.text-link:hover{border-color:var(--copper)}
.hero-side{text-align:right;padding-bottom:8px}
.hero-side .yr{display:block;font-family:var(--serif);font-size:clamp(54px,8vw,102px);line-height:1;color:rgba(194,160,106,.22);-webkit-text-stroke:1px var(--copper)}
.hero-side small{display:block;margin-top:14px;font-size:11px;letter-spacing:.2em;color:var(--muted)}

.chapter{padding:88px 0;border-top:1px solid var(--line)}
.chapter.alt{background:var(--paper);color:var(--dark-text);margin:0 calc(-1 * (50vw - 50%));padding-left:calc(50vw - 50%);padding-right:calc(50vw - 50%)}
.chapter.alt>.chapter-head,.chapter.alt>.facts{max-width:1180px;margin-left:auto;margin-right:auto}
.chapter.alt .chapter-head{border-color:var(--line-dark)}
.chapter.alt .chapter-num{color:var(--copper-dark)}
.chapter.alt .chapter-note{color:var(--muted-dark)}
.chapter-head{display:grid;grid-template-columns:76px 1fr auto;align-items:baseline;gap:20px;padding-bottom:26px;border-bottom:1px solid var(--line);margin-bottom:44px}
.chapter-num{font-family:var(--serif);font-size:15px;letter-spacing:.10em;color:var(--copper)}
.chapter h2{font-family:var(--serif);font-weight:400;font-size:clamp(26px,3.4vw,38px);margin:0;letter-spacing:.08em}
.chapter-note{font-size:12px;letter-spacing:.14em;color:var(--muted)}

.story-body{max-width:770px;font-size:16.5px;color:#d7ddd8}
.story-body .sp{margin:0 0 26px}
.story-body .pull{font-family:var(--serif);font-size:clamp(24px,3.2vw,36px);line-height:1.6;color:var(--copper);border-left:2px solid var(--copper);padding-left:28px;margin:44px 0}
.story-body .statement{font-family:var(--serif);font-size:clamp(21px,2.6vw,28px);color:var(--light);letter-spacing:.04em;margin:40px 0}
.story-body strong{color:var(--light);font-weight:600}

.spec-list{max-width:920px}
.spec-row{display:grid;grid-template-columns:76px 1fr;gap:20px;padding:26px 0;border-bottom:1px solid var(--line)}
.spec-row:first-child{border-top:1px solid var(--line)}
.spec-num{font-family:var(--serif);font-size:26px;color:var(--copper);line-height:1}
.spec-body h3{font-family:var(--serif);font-weight:400;font-size:22px;margin:0 0 8px;letter-spacing:.06em}
.spec-body p{margin:0;font-size:15px;color:var(--light-mid);max-width:720px}

.facts{margin:0;max-width:920px}
.fact-row{display:grid;grid-template-columns:180px 1fr;gap:20px;padding:18px 0;border-bottom:1px solid var(--line-dark)}
.fact-row:first-child{border-top:1px solid var(--line-dark)}
.fact-row dt{font-size:12px;letter-spacing:.18em;color:var(--muted-dark)}
.fact-row dd{margin:0;font-family:var(--serif);font-size:19px;color:var(--dark-text)}

.qa-list{max-width:1000px}
.qa-row{display:grid;grid-template-columns:minmax(220px,.8fr) 1.4fr;gap:40px;padding:26px 0;border-bottom:1px solid var(--line)}
.qa-row:first-child{border-top:1px solid var(--line)}
.qa-q{margin:0;font-family:var(--serif);font-size:19px;color:var(--light)}
.qa-a{margin:0;font-size:15px;color:var(--light-mid)}

.contact{padding:88px 0 112px;border-top:1px solid var(--line)}
.contact-note{font-size:14px;color:var(--muted);max-width:620px;margin:0 0 30px}
.site-domain{font-family:var(--serif);font-size:clamp(30px,5vw,56px);letter-spacing:.06em;color:var(--copper);text-decoration:none;border-bottom:1px solid var(--line)}
.site-domain:hover{border-color:var(--copper)}

.footer{border-top:1px solid var(--line);padding:34px 0 48px;font-size:12px;color:var(--muted)}
.footer-inner{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:16px}
.footer .fb{font-family:var(--serif);font-size:15px;letter-spacing:.16em;color:var(--copper)}
.foot-note{margin:0;max-width:820px;line-height:1.8}

@media(max-width:820px){
  .masthead{align-items:center}.est{display:none}
  .hero{grid-template-columns:1fr;gap:36px;padding:70px 0 80px}
  .hero::before{display:none}.hero-side{text-align:left}
  .chapter{padding:64px 0}
  .chapter-head{grid-template-columns:52px 1fr;gap:12px;margin-bottom:32px}
  .chapter-note{display:none}
  .spec-row{grid-template-columns:52px 1fr;gap:12px}
  .fact-row{grid-template-columns:1fr;gap:4px}
  .qa-row{grid-template-columns:1fr;gap:12px}
  .chapter.alt{padding-top:64px;padding-bottom:64px}
}