:root{
  --bg:#ffffff;
  --page:#f7faf9;
  --ink:#1a1a1a;
  --muted:#5c5c5c;
  --line:#e6e8e7;
  --acc:#2d8a8a;
  --acc-dark:#236d6d;
  --nav-on:#e8eef0;
  --b:#fff;
  --mx:min(1180px,94vw);
}
*,*::before,*::after{box-sizing:border-box}
html{background:var(--page);scroll-behavior:smooth}
body{margin:0;font:16px/1.55 Inter,system-ui,Segoe UI,Arial,sans-serif;color:var(--ink);background:var(--page)}
a{color:var(--acc)}a:hover{color:var(--acc-dark);text-decoration:underline}
img{max-width:100%;display:block}
.skip{position:absolute;left:-9999px;top:8px;background:var(--b);padding:8px}.skip:focus{left:8px;z-index:99;outline:2px solid #38bdf8}
.vhide{position:absolute;width:1px;height:1px;clip:rect(0,0,0,0);overflow:hidden}
.shell{max-width:var(--mx);margin:0 auto;padding:0 20px}

/* header (mockup: centered logo + nav) */
.header{position:sticky;top:0;z-index:7;background:var(--b);border-bottom:1px solid var(--line)}
.header-stack{display:flex;flex-direction:column;align-items:center;text-align:center;padding:14px 0 10px;position:relative}
.brand-mark img{height:auto;max-height:44px;width:auto;margin:0 auto}
.nav-toggle{display:none;position:absolute;right:20px;top:18px;background:var(--b);border:1px solid var(--line);border-radius:6px;padding:6px 10px;cursor:pointer;font:700 16px/1 Inter,sans-serif}
.main-nav{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;padding:6px 0 4px}
.nb{display:inline-block;padding:8px 12px;border-radius:6px;color:var(--ink);text-decoration:none;font-weight:600;font-size:0.95rem}
.nb.on{background:var(--nav-on);font-weight:800}
.main-nav a.nb:hover{text-decoration:none;background:var(--nav-on)}

/* dropdown nav */
.nd{position:relative;display:flex;align-items:center;gap:2px}
.nd::after{content:"";position:absolute;left:0;right:0;top:100%;height:8px;}
.nd-link{padding-right:8px}
.nd-toggle{
  border:0;background:transparent;color:#5c6770;font:700 11px/1 Inter,sans-serif;
  padding:8px 8px;cursor:pointer;border-radius:6px;
}
.nd-toggle:hover{background:var(--nav-on)}
.nd.open .nd-toggle{color:var(--ink);background:var(--nav-on)}
.nd-menu{
  display:none;position:absolute;top:calc(100% - 1px);left:0;z-index:20;min-width:280px;
  margin:0;padding:6px 0;list-style:none;background:var(--b);
  border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(15,23,42,.12);
  text-align:left;
}
.nd-menu li{margin:0}
.nd-menu a{
  display:block;padding:7px 10px;color:var(--ink);text-decoration:none;
  font:500 0.84rem/1.3 Inter,system-ui,sans-serif;
}
.nd-menu a:hover{background:var(--page);color:var(--acc-dark);text-decoration:none}
.nd:hover .nd-menu,.nd:focus-within .nd-menu,.nd.open .nd-menu{display:block}

@media(max-width:900px){
  .nav-toggle{display:block}
  .main-nav{display:none;flex-direction:column;width:100%;align-items:stretch;padding-bottom:10px}
  .main-nav.is-open{display:flex}
  .nb{text-align:center}
  .nd{flex-wrap:wrap;justify-content:center}
  .nd-link{flex:1;text-align:center}
  .nd-toggle{padding:8px 12px}
  .nd-menu{
    position:static;display:none;min-width:0;width:100%;margin:0 0 6px;
    box-shadow:none;border:1px solid var(--line);border-radius:8px;
  }
  .nd.open .nd-menu{display:block}
  .nd:hover .nd-menu,.nd:focus-within .nd-menu{display:none}
  .nd.open:hover .nd-menu,.nd.open:focus-within .nd-menu{display:block}
}

/* banner photo */
.banner-photo{
  width:100vw;position:relative;left:50%;right:50%;margin-left:-50vw;margin-right:-50vw;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(0,24,32,.45) 0%,rgba(0,24,32,.55) 100%),var(--banner);
  background-size:cover;
  background-position:center;
  min-height:clamp(220px,32vw,320px);
}
.banner-overlay{max-width:56rem;padding:clamp(28px,6vw,52px) 20px;color:#fff;text-align:center}
.banner-photo h1{margin:0 0 10px;font-size:clamp(1.55rem,4vw,2.35rem);line-height:1.1;font-weight:800;letter-spacing:-.02em;text-shadow:0 1px 2px rgba(0,0,0,.35)}
.banner-lead{margin:0 auto;max-width:46rem;font-size:clamp(0.95rem,2vw,1.1rem);line-height:1.55;color:#f4fbfb;text-shadow:0 1px 2px rgba(0,0,0,.35)}
.lead strong{color:#fff;font-weight:700}

/* layout */
.grid-main{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start;padding:26px 0 36px}
@media(max-width:1023px){.grid-main{grid-template-columns:1fr}}
.h-sec{margin:0 0 14px;font-size:1.12rem;letter-spacing:.01em;font-weight:700}
.h1-sec{margin:0 0 6px;font-size:clamp(22px,2.2vw,28px)}
.bc{font:13px/1.2 Inter;color:#6b7280;margin:16px 0}
.bc .b-h{color:var(--ink);font-weight:600}
.le{color:var(--muted);margin:0 0 18px}

/* cards */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:900px){.cards-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.cards-3{grid-template-columns:1fr}}
.card{background:var(--b);border:1px solid var(--line);border-radius:10px;padding:12px;display:flex;flex-direction:column;box-shadow:0 1px 0 rgba(0,0,0,.04)}
.c-img{line-height:0}
.c-img img{width:100%;height:200px;object-fit:cover;border-radius:6px}
.c-title{margin:6px 0 4px;font-size:1.02rem}
.c-title a{text-decoration:none;color:var(--ink);font-weight:700}
.c-title a:hover{text-decoration:underline;color:var(--acc-dark)}
.tag{font:700 11px/1.35 Inter,sans-serif;letter-spacing:0.04em;color:var(--acc);margin:8px 0 0;text-transform:none}
.ex{flex:1;font-size:.95rem;margin:0 0 6px;color:var(--muted)}
.by{font-size:12.5px;color:#6b7280;margin:0}
.by a{color:var(--acc);text-decoration:none;font-weight:600}
.by a:hover{text-decoration:underline}

/* sidebar */
.widget{background:var(--b);border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin:0 0 14px}
.widget h3{margin:0 0 8px;font-size:15px;font-weight:700;letter-spacing:.01em}
.pop-list{margin:0;padding-left:1.1rem;color:var(--ink)}
.pop-list a{color:var(--ink);text-decoration:none;font-weight:600}
.pop-list a:hover{color:var(--acc)}
.q{font-size:13px;color:var(--muted);margin:0 0 8px}
.dow{display:flex;justify-content:space-between;font-size:11px;font-weight:700;color:var(--muted);margin:0 0 6px;padding:0 2px}
.heat{display:flex;gap:4px;flex-wrap:wrap}
.heat span{flex:1;min-width:10px;height:22px;border-radius:4px;background:var(--acc)}
.heat .b0{opacity:.28}.heat .b1{opacity:.48}.heat .b2{opacity:.72}
.side-auth{display:grid;grid-template-columns:72px 1fr;gap:12px;align-items:start;margin-top:4px}
.side-auth-img{border-radius:50%;object-fit:cover;border:1px solid var(--line)}
.side-auth-name{margin:0 0 4px;font-weight:700}
.side-auth-name a{color:var(--ink);text-decoration:none}
.side-auth-name a:hover{color:var(--acc)}
.side-auth-bio{margin:0;font-size:13px;color:var(--muted);line-height:1.45}

.btn{display:inline-block;background:var(--acc-dark);color:#f8fafc;padding:8px 14px;border-radius:6px;font:600 13px Inter,sans-serif;text-decoration:none;border:0}
.btn:hover{opacity:.92;text-decoration:none}

/* post */
.post-wrap{max-width:min(1000px,94vw);padding:10px 0 40px}
.ymyl{background:#fff8db;border-left:3px solid #b45309;padding:10px 12px;font-size:0.95rem;margin:10px 0}
.ph{max-width:100ch}
.k{font:700 11px Inter;color:var(--acc);letter-spacing:.08em;text-transform:none;margin:0}
.ph h1{margin:6px 0 8px;font-size:clamp(1.45rem,3vw,2rem)}
.dek{color:var(--muted);margin:0 0 8px}
.ph .byline{font-size:0.92rem;color:#6b7280}
.ph .byline a{color:var(--acc);font-weight:600}
.post-cover{margin:12px 0}
.pimg{width:100%;max-height:520px;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.pro{max-width:70ch;font-size:1.05rem}
.pro p{margin:0 0 0.85em;color:#243036;line-height:1.65}
.pro h2{margin:1.15em 0 0.45em;font-size:1.2rem}
.edit-note{color:#334155;font:0.95rem/1.35 Georgia,"Times New Roman",serif;margin:0 0 0.35em}

.ref,.faq{margin:1.2rem 0;max-width:75ch}
.faq h2{margin:0 0 0.35em;font-size:1.15rem}
.q button{
  all:initial;
  font:700 0.95rem/1.2 Inter,sans-serif;
  display:block;width:100%;text-align:left;padding:0.45rem 0.5rem;border:1px solid var(--line);
  background:#fff;border-radius:6px;cursor:pointer;color:var(--ink);box-sizing:border-box;
}
.faq .a{border:1px solid var(--line);border-top:0;padding:0.5rem 0.65rem;border-radius:0 0 6px 6px;background:#fafafa}

.auth-box{max-width:100%;display:grid;grid-template-columns:72px 1fr;gap:12px;border:1px solid var(--line);border-radius:8px;padding:12px;background:var(--b);margin-top:1.5rem}
.aimg{width:72px;height:72px;border-radius:50%;object-fit:cover;border:1px solid var(--line)}
.ab-h{margin:0 0 4px;font-size:1rem}
.a-n{margin:0 0 6px;font-size:0.95rem}
.a-bio{margin:0;font-size:0.92rem;color:var(--muted);line-height:1.45}

/* footer mockup: light bar */
.footer{background:var(--b);border-top:1px solid var(--line);margin-top:10px;padding:18px 0 28px;color:var(--muted)}
.footer-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;max-width:var(--mx);margin:0 auto;padding:0 20px}
.footer-nav{display:flex;flex-wrap:wrap;gap:14px}
.footer-nav a{color:var(--ink);text-decoration:none;font-weight:600;font-size:0.95rem}
.footer-nav a:hover{color:var(--acc)}
.f-copy{margin:0;font-size:13px;color:#6b7280}

/* static docs */
.doc{background:var(--b);border:1px solid var(--line);border-radius:10px;padding:22px 22px 30px;margin:22px auto;box-shadow:0 1px 0 rgba(0,0,0,.03)}
.doc h1{margin-top:0}
.doc h2{margin-top:1.4em;font-size:1.15rem}
.doc p{line-height:1.65;color:#333}

/* search + misc */
.cform label{font-weight:600}
input,textarea{font:inherit}
.page-wrap{min-height:50vh}