:root{--paper:#F4EDE0;--deep:#E4D6C0;--card:#FBF6EC;--sub:#EDE3D0;--ink:#1C160C;--text:#2A2214;--muted:#5A4A30;--soft:#7A6848;--gold:#8A6A28;--copper:#C49A3C;--line:rgba(28,22,12,.12);--focus:rgba(138,106,40,.50);--shadow:0 12px 28px rgba(28,22,12,.08)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--text);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
img{display:block;max-width:100%}
.top-rail{position:fixed;z-index:80;top:0;left:0;right:0;height:20px;background:var(--ink);color:var(--copper);font-size:12px}
.bar-inner,.brand-inner,.needle-inner,.footer-inner,.content{width:min(960px,calc(100% - 32px));margin:0 auto}
.bar-inner{height:20px;display:flex;align-items:center;justify-content:space-between}
.text-control{border:0;background:transparent;color:var(--copper);padding:0 4px;min-height:20px}
.brand-bar{position:fixed;z-index:79;top:20px;left:0;right:0;height:54px;background:var(--card);border-bottom:1px solid var(--focus)}
.brand-inner{height:54px;display:flex;align-items:center;justify-content:space-between}
.brand-link{display:flex;align-items:center;min-height:44px;max-width:52%}
.brand-link img,.footer-brand img,.drawer-brand img{height:24px;width:auto;object-fit:contain;object-position:left center}
.brand-text{font-weight:800;font-size:16px;color:var(--ink)}
.brand-actions{display:flex;align-items:center;gap:8px}
.top-app-link,.drawer-button{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 14px;border:1px solid var(--gold);background:var(--card);color:var(--ink);white-space:nowrap}
.drawer-button{background:var(--ink);color:var(--copper)}
.needle-nav{position:fixed;z-index:78;top:74px;left:0;right:0;height:44px;background:var(--card);border-bottom:1px solid var(--line)}
.needle-inner{height:44px;display:flex;align-items:center;justify-content:center;gap:34px}
.needle-link{display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 10px;font-size:13px}
.needle{width:3px;height:22px;background:var(--ink)}
.needle-link.is-active .needle{background:var(--copper)}
.needle-link.is-active{font-weight:700;color:var(--gold)}
.site-main{padding-top:142px;padding-bottom:44px;min-height:70vh}
.content{padding:24px 0 12px}
h1,h2,h3{color:var(--ink);margin-top:0}
h1{font-size:24px;line-height:1.3;margin-bottom:16px}
h2{font-size:20px;line-height:1.45;margin-bottom:10px}
h3{font-size:16px;line-height:1.45;margin-bottom:8px}
p{margin:0 0 14px}
.lead{font-size:16px;color:var(--muted);max-width:780px}
.eyebrow{font-size:12px;letter-spacing:.16em;color:var(--gold);font-weight:700;margin-bottom:8px}
.hero-simple{padding:34px 0 30px;border-bottom:1px solid var(--focus)}
.hero-simple .hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 18px;white-space:nowrap;border:1px solid var(--gold);font-size:14px}
.primary-button{background:linear-gradient(135deg,var(--ink) 0%,var(--copper) 100%);color:var(--card)}
.secondary-button{background:var(--card);color:var(--ink)}
.primary-button:hover,.secondary-button:hover,.top-app-link:hover,.drawer-button:hover{transform:translateY(-1px)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.section{padding:32px 0;border-bottom:1px solid var(--line)}
.media-slot{background:var(--card);border:1px solid var(--line);min-height:160px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}
.media-176{height:176px}.media-200{height:200px}.media-220{height:220px}.media-320{height:320px}
.two-needle-index{display:flex;gap:26px;align-items:center;margin-bottom:18px}
.two-needle-index a{display:inline-flex;gap:8px;align-items:center;font-size:13px}
.two-needle-index i{display:block;width:3px;height:22px;background:var(--copper)}
.split-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.split-card{background:var(--card);border:1px solid var(--line);padding:16px;box-shadow:var(--shadow)}
.split-card .media-slot{margin:-16px -16px 14px}
.single-log{display:grid;gap:10px}
.log-item{display:grid;grid-template-columns:56px 1fr;gap:16px;padding:16px 0;border-top:1px solid var(--line)}
.log-item:first-child{border-top:0}
.log-no{font-size:28px;color:var(--gold);font-weight:800;line-height:1}
.fold-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.fold{position:relative;background:var(--sub);border-left:4px solid var(--gold);padding:18px;box-shadow:var(--shadow)}
.fold:after{content:"";position:absolute;right:0;top:0;border-style:solid;border-width:0 18px 18px 0;border-color:transparent var(--paper) transparent transparent}
.shelf-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.shelf-card{background:var(--card);border-top:3px solid var(--gold);padding:18px}
.period-row{display:grid;grid-template-columns:90px 1fr;gap:18px;padding:18px 0;border-top:1px solid var(--line)}
.period-row strong{color:var(--gold)}
.status-list{display:grid;gap:10px}
.status-item{display:grid;grid-template-columns:110px 1fr;gap:18px;align-items:start;padding:14px 16px;background:var(--card);border:1px solid var(--line)}
.status-badge{display:inline-flex;justify-content:center;align-items:center;min-height:34px;background:var(--ink);color:var(--card);padding:4px 9px}
.app-split{display:grid;grid-template-columns:minmax(220px,34%) 1fr;gap:28px;align-items:center}
.app-visual{display:flex;flex-direction:column;align-items:center;gap:14px}
.app-icon{width:48px;height:48px;object-fit:contain}
.note-list,.method-list,.terms-list{display:grid;gap:12px}
.note-item,.method-item,.terms-item{background:var(--card);border:1px solid var(--line);padding:18px}
.topic-list{display:grid;gap:12px}
.topic-item{display:grid;grid-template-columns:160px 1fr;gap:20px;padding:18px 0;border-top:1px solid var(--line)}
.center-card{max-width:720px;margin:0 auto 18px;background:var(--card);border:1px solid var(--line);padding:22px;text-align:center;box-shadow:var(--shadow)}
.center-card p{text-align:left}
.faq-mini{display:grid;gap:10px}
.faq-mini article{background:var(--card);border-left:3px solid var(--gold);padding:16px}
.statement{padding:20px;background:var(--ink);color:var(--paper)}
.statement h2{color:var(--copper)}
.statement p{color:var(--paper)}
.page-head{padding:26px 0 20px;border-bottom:1px solid var(--focus)}
.page-head .media-slot{margin-top:18px}
.page-layout-needle .index-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:18px 0}
.page-layout-needle .index-item{background:var(--card);border-left:3px solid var(--gold);padding:16px}
.page-layout-split .split-wide{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.page-layout-log .chapter{padding:20px 0;border-top:1px solid var(--line)}
.page-layout-leftimg .feature-row{display:grid;grid-template-columns:38% 1fr;gap:24px;align-items:center}
.page-layout-fold .fold-stack{display:grid;gap:14px}
.page-layout-fold .fold-row{background:var(--sub);padding:20px;border-left:4px solid var(--gold)}
.article-copy{max-width:820px}
.article-copy h2{margin-top:28px}
.info-band{display:grid;grid-template-columns:150px 1fr;gap:20px;padding:18px 0;border-top:1px solid var(--line)}
.compact-list{margin:0;padding-left:1.2em}
.compact-list li{margin:7px 0}
.site-footer{background:var(--ink);color:var(--paper);border-top:1px solid var(--copper);font-size:13px;padding:30px 0 76px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.footer-brand strong{display:block;color:var(--copper);font-size:16px}
.footer-brand span{display:block;color:var(--paper)}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.footer-grid h2{font-size:13px;color:var(--copper);margin-bottom:8px}
.footer-grid a{display:flex;align-items:center;min-height:44px;color:var(--paper);padding:4px 0}
.footer-note{margin-top:22px;color:#EADFCF}
.copyright{color:#D9C9B5;margin-bottom:0}
.overlay{position:fixed;z-index:89;inset:0;background:rgba(28,22,12,.46);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}
.gold-drawer{position:fixed;z-index:91;left:50%;bottom:16px;width:280px;max-height:340px;transform:translate(-50%,calc(100% + 40px));background:var(--card);border:1px solid var(--gold);box-shadow:var(--shadow);visibility:hidden;pointer-events:none;transition:.24s;overflow:auto}
.gold-drawer.is-open{transform:translate(-50%,0);visibility:visible;pointer-events:auto}
.drawer-head{position:sticky;top:0;z-index:2;background:var(--card);display:flex;justify-content:space-between;align-items:center;padding:12px;border-bottom:1px solid var(--line)}
.drawer-brand{display:flex;align-items:center;gap:8px}
.close-button{min-height:44px;padding:0 12px;border:1px solid var(--gold);background:var(--card);color:var(--ink)}
.drawer-groups{padding:8px 12px 14px}
.drawer-groups section{padding:10px 0;border-bottom:1px solid var(--line)}
.drawer-groups h2{font-size:13px;color:var(--gold);margin-bottom:6px}
.drawer-groups a{display:block;padding:7px 0}
.drawer-groups b{display:block;color:var(--ink)}
.drawer-groups span{display:block;color:var(--soft);font-size:12px}
.search-panel{position:fixed;z-index:90;left:0;right:0;top:74px;visibility:hidden;pointer-events:none;opacity:0;transition:.2s}
.search-panel.is-open{visibility:visible;pointer-events:auto;opacity:1}
.search-card{width:min(720px,calc(100% - 32px));margin:0 auto;background:var(--card);border:1px solid var(--gold);box-shadow:var(--shadow);padding:18px}
.search-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.search-head strong{display:block;color:var(--ink);font-size:16px}
.search-head span{display:block;color:var(--muted);font-size:13px}
.search-box{display:grid;grid-template-columns:72px 1fr;align-items:center;margin:16px 0;border:1px solid var(--line);background:#fff;padding-left:12px}
.search-box input{min-width:0;height:44px;border:0;background:transparent;color:var(--ink);outline:none}
.search-presets{display:flex;gap:8px;flex-wrap:wrap}
.search-presets a{display:inline-flex;align-items:center;min-height:44px;padding:0 12px;border:1px solid var(--gold);background:var(--card)}
.ui-locked{overflow:hidden}
.mobile-bottom{display:none}
@media (max-width:700px){
  .bar-inner,.brand-inner,.footer-inner,.content{width:calc(100% - 32px)}
  .needle-nav{display:none}
  .site-main{padding-top:98px;padding-bottom:72px}
  .brand-link{max-width:44%}
  .brand-actions{gap:5px}
  .top-app-link,.drawer-button{padding:0 10px}
  .split-cards,.fold-grid,.shelf-cards,.footer-grid,.page-layout-split .split-wide{grid-template-columns:1fr}
  .app-split,.page-layout-leftimg .feature-row{grid-template-columns:1fr}
  .topic-item,.info-band,.status-item{grid-template-columns:1fr;gap:8px}
  .period-row{grid-template-columns:72px 1fr;gap:12px}
  .page-layout-needle .index-grid{grid-template-columns:1fr}
  .gold-drawer{width:88%;bottom:60px;max-height:340px}
  .search-panel{top:0;bottom:0;background:var(--ink)}
  .search-card{width:100%;height:100%;margin:0;background:var(--ink);border:0;color:var(--copper);padding:24px 16px}
  .search-head strong{color:var(--copper)}
  .search-head span{color:var(--paper)}
  .search-box{background:var(--card);color:var(--ink)}
  .search-presets a{background:transparent;color:var(--copper);border-color:var(--copper)}
  .search-panel .close-button{background:var(--ink);color:var(--copper);border-color:var(--copper)}
  .mobile-bottom{position:fixed;z-index:70;display:grid;grid-template-columns:repeat(4,1fr);left:0;right:0;bottom:0;min-height:48px;padding-bottom:env(safe-area-inset-bottom);background:var(--card);border-top:1px solid var(--gold)}
  .mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px}
  .mobile-bottom a.is-active{background:var(--gold);color:var(--card)}
  .site-footer{padding-bottom:90px}
  .media-320{height:300px}
}