:root{
  --bg:#000; --card:#111; --card2:#161616; --line:#333;
  --text:#fff; --muted:#9aa0a6;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.55;-webkit-font-smoothing:antialiased}
.wrap{max-width:1200px;margin:0 auto;padding:80px 20px 60px}
.page-title{position:sticky;top:56px;background:#000;z-index:95;font-size:28px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:#fff;text-align:center;padding:16px 0;border-top:2px solid #fff;border-bottom:2px solid #fff;margin-bottom:0}
.layout{display:grid;grid-template-columns:140px 1fr;gap:28px;align-items:start;padding-top:30px}
.sidebar{position:sticky;top:150px;max-height:calc(100vh - 170px);overflow-y:auto}
.toc{display:flex;flex-direction:column;gap:2px}
.toc a{display:block;padding:8px 10px;color:#c0c6cc;text-decoration:none;font-size:14px;font-weight:600;transition:all .2s;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.toc a:hover{color:#fff}
.toc a.active{color:#fff;border-left:2px solid #fff}
.topnav{position:fixed;top:0;left:0;right:0;background:rgba(0,0,0,.92);border-bottom:1px solid var(--line);z-index:100;backdrop-filter:blur(8px)}
.nav-inner{max-width:1080px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:center;height:56px}
.nav-links{display:flex;gap:24px;list-style:none;margin:0;padding:0}
.nav-links a{color:#c0c6cc;text-decoration:none;font-size:18px;font-weight:600}
.nav-links a:hover{color:#fff}
.cta{text-align:center;padding:40px 24px;margin:0 0 40px;border-top:1px solid var(--line)}
.cta h2{font-size:26px;font-weight:700;color:#fff;margin-bottom:10px}
.cta p{color:var(--muted);font-size:15px;max-width:560px;margin:0 auto 24px}
.btn{display:inline-block;background:#fff;color:#000;font-weight:700;font-size:16px;padding:14px 32px;border-radius:8px;text-decoration:none}
.btn:hover{opacity:.85}
.foot{text-align:center;color:var(--muted);font-size:13px;margin-top:36px;border-top:1px solid var(--line);padding-top:24px}
.float-btn{position:fixed;bottom:28px;right:28px;background:#fff;width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;text-decoration:none;box-shadow:0 4px 20px rgba(0,0,0,.4);z-index:99;transition:transform .2s}
.float-btn svg,.to-top svg{display:block;shape-rendering:geometricPrecision}
.float-btn svg{width:32px;height:32px}
.to-top svg{width:28px;height:28px}
.float-btn:hover{transform:scale(1.08)}
.to-top{position:fixed;bottom:104px;right:28px;background:transparent;border:2px solid #fff;color:#fff;width:64px;height:64px;border-radius:50%;text-decoration:none;display:flex;align-items:center;justify-content:center;z-index:99;transition:all .2s;opacity:.7}
.to-top svg{width:28px;height:28px;display:block}
.to-top:hover{background:#fff;color:#000;opacity:1}
.dept{font-size:26px;font-weight:700;margin:40px 0 12px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;text-transform:uppercase;letter-spacing:1px;color:#fff;padding-top:10px;white-space:nowrap}
.dept::before{content:'';width:4px;height:26px;background:#fff;display:inline-block;flex-shrink:0}
.proj{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 18px 16px;margin-bottom:16px;scroll-margin-top:130px}
.proj h3{font-size:18px;font-weight:700;margin-bottom:10px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.proj p{color:#c0c6cc;font-size:14px;line-height:1.6;margin-bottom:8px}
.proj p b{color:#fff}
.note{color:#c0c6cc;font-size:14px;margin-bottom:16px;line-height:1.6}
.contact{text-align:center;margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.contact p{color:#c0c6cc;font-size:16px;line-height:1.6}
.contact p.phone{color:#fff;font-size:17px;margin-top:8px}
.st{display:inline-block;font-size:12px;font-weight:700;padding:3px 10px;border-radius:20px;text-transform:none;margin-bottom:8px;background:#fff !important;color:#000 !important}
.st.done{background:#fff !important;color:#000 !important}
.st.todo{background:#fff !important;color:#000 !important}
.proj p.todo b{display:block;width:max-content;max-width:100%;background:#fff !important;color:#000 !important;padding:3px 10px;border-radius:20px;font-weight:700;margin-bottom:8px}
.proj p b.st-label{display:inline-block;background:#fff;color:#000;padding:3px 10px;border-radius:20px}
@media(max-width:768px){
  .page-title{font-size:20px;padding:12px 0;position:static}
  .dept{font-size:18px}
  .nav-links{gap:12px}
  .nav-links a{font-size:16px}
  .layout{grid-template-columns:1fr;gap:16px;padding-top:0;min-width:0}
  .sidebar{position:static;padding:0;border-bottom:none;width:100vw;margin-left:calc(-50vw + 50%);}
  .toc{position:static;background:#000;padding:8px 0;border-bottom:1px solid #333;display:flex;flex-direction:row;flex-wrap:nowrap;gap:0;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;width:100%;max-width:100vw}
  .toc::-webkit-scrollbar{display:none}
  .toc a{flex-shrink:0;border-left:none;border-right:1px solid #333;padding:8px 14px;font-size:13px;white-space:nowrap}
  .toc a:hover{border-left:none}
  .toc a.active{border-left:none;background:rgba(255,255,255,.08)}
  .proj{padding:14px}
  .proj h3{font-size:16px}
  .proj p{font-size:13px}
  .float-btn{bottom:14px;right:14px;width:44px;height:44px}
  .float-btn svg{width:22px;height:22px}
  .to-top{bottom:68px;right:14px;width:44px;height:44px}
  .to-top svg{width:20px;height:20px}}

.hidden{display:none!important}
.back-link{display:inline-block;margin-bottom:12px;color:#fff!important;border:1px solid #fff;border-radius:20px;padding:5px 14px;font-size:15px!important;text-decoration:none}
.back-link:hover{background:#fff;color:#000!important}