/* =========================================================
   BAIYOU EGG — Standards pages
   01 FDA / 02 Zero residue / 03 Raw edible / 04 SEM-BIO
   ========================================================= */

/* ---------- nav dropdown (subpages) ---------- */
.nav-drop{position:relative}
.nav-drop-toggle{
  display:inline-flex;
  align-items:center;
  gap:5px;
  padding:6px 0;
  border:0;
  background:none;
  font-family:var(--sans);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--ink-2);
  cursor:pointer;
}
.nav-drop-toggle .caret{font-size:8px;opacity:.6;transition:transform .3s var(--ease)}
.nav-drop:hover .caret,.nav-drop:focus-within .caret{transform:rotate(180deg)}
.nav-drop-menu{
  position:absolute;
  z-index:3;
  top:calc(100% + 12px);
  left:50%;
  width:292px;
  padding:8px;
  border:1px solid var(--line-soft);
  border-radius:14px;
  background:var(--paper);
  box-shadow:0 32px 60px -30px rgba(60,35,10,.45);
  opacity:0;
  visibility:hidden;
  transform:translate(-50%,6px);
  transition:.3s var(--ease);
}
.nav-drop:hover .nav-drop-menu,.nav-drop:focus-within .nav-drop-menu{
  opacity:1;
  visibility:visible;
  transform:translate(-50%,0);
}
.nav-drop-menu a{
  display:block;
  padding:10px 12px;
  border-radius:8px;
  color:var(--ink-2);
  font-size:12px;
  letter-spacing:.02em;
  text-decoration:none;
  transition:.25s;
}
.nav-drop-menu a small{
  display:block;
  margin-top:2px;
  font-family:var(--latin);
  font-size:9px;
  letter-spacing:.12em;
  color:var(--muted);
}
.nav-drop-menu a:hover{background:var(--bg);color:var(--yolk-deep)}
.nav-drop-menu a.is-current{background:rgba(232,115,28,.07);color:var(--yolk-deep)}
.subpage .nav:not(.is-scrolled) .nav-drop .nav-drop-menu a{color:var(--ink-2)}
.subpage .nav:not(.is-scrolled) .nav-drop .nav-drop-menu a:hover{color:var(--yolk-deep)}
.subpage .nav:not(.is-scrolled) .nav-drop .nav-drop-menu a.is-current{color:var(--yolk-deep)}
.subpage .nav:not(.is-scrolled) .nav-drop .nav-drop-menu a small{color:var(--muted)}

/* dark hero nav */
.subpage .nav::before{
  background:linear-gradient(180deg,rgba(31,25,19,.94),rgba(31,25,19,.58) 58%,rgba(31,25,19,0));
}
.subpage .nav:not(.is-scrolled) .brand{color:var(--paper)}
.subpage .nav:not(.is-scrolled) .brand-text small{color:rgba(250,244,232,.5)}
.subpage .nav:not(.is-scrolled) .nav-links a,
.subpage .nav:not(.is-scrolled) .nav-drop-toggle{color:rgba(250,244,232,.72)}
.subpage .nav:not(.is-scrolled) .nav-drop-toggle:hover{color:var(--paper)}
.subpage .nav:not(.is-scrolled) .nav-cta{background:var(--paper);color:var(--ink)}
.subpage .nav:not(.is-scrolled) .burger{border-color:rgba(250,244,232,.28)}
.subpage .nav:not(.is-scrolled) .burger span{background:var(--paper)}
.subpage .nav:not(.is-scrolled) .nav-links a::after{background:var(--yolk-soft)}

/* ---------- hero ---------- */
.std-hero{
  position:relative;
  padding:138px 0 80px;
  background:#1F1913;
  color:var(--paper);
  overflow:hidden;
}
.std-hero::before{
  content:"";
  position:absolute;
  top:-20%;right:-12%;
  width:60vw;height:60vw;
  background:radial-gradient(circle,rgba(232,115,28,.18),transparent 64%);
  pointer-events:none;
}
.std-hero .container{position:relative}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-bottom:42px;
  font-size:10px;
  letter-spacing:.08em;
  color:rgba(250,244,232,.38);
}
.breadcrumb a{color:rgba(250,244,232,.6);text-decoration:none;transition:.25s}
.breadcrumb a:hover{color:var(--yolk-soft)}
.breadcrumb i{font-style:normal;color:rgba(250,244,232,.25)}

.std-hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:clamp(32px,6vw,80px);
  align-items:center;
}
.std-hero .eyebrow{color:rgba(250,244,232,.5)}
.std-hero .eyebrow::before{background:var(--yolk)}
.std-hero h1{
  margin:18px 0 22px;
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(2.9rem,5.7vw,4.9rem);
  line-height:1.06;
  letter-spacing:.015em;
}
.std-hero h1.is-long{font-size:clamp(2.4rem,4.6vw,4rem)}
.std-hero h1 em{
  display:inline-block;
  margin-left:14px;
  color:var(--yolk-soft);
  font-family:var(--latin);
  font-style:italic;
  font-size:.28em;
  font-weight:300;
  vertical-align:super;
}
.std-lead{
  margin:0 0 28px;
  max-width:44ch;
  font-size:14px;
  font-weight:300;
  line-height:2;
  color:rgba(250,244,232,.64);
}
.std-facts{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:14px;
  margin-bottom:30px;
  padding-top:18px;
  border-top:1px solid rgba(250,244,232,.14);
}
.std-facts b{display:block;font-family:var(--latin);font-size:25px;font-weight:400;line-height:1;color:var(--paper)}
.std-facts span{display:block;margin-top:7px;font-size:9.5px;line-height:1.5;letter-spacing:.04em;color:rgba(250,244,232,.44)}
.std-actions{display:flex;flex-wrap:wrap;gap:10px}
.std-hero .btn--ghost{border-color:rgba(250,244,232,.24);color:var(--paper)}
.std-hero .btn--ghost:hover{border-color:var(--paper);background:rgba(250,244,232,.06)}

.std-hero-media{
  position:relative;
  margin:0;
  aspect-ratio:4/3;
  border-radius:16px;
  overflow:hidden;
  background:#2A221A;
}
.std-hero-media img{width:100%;height:100%;object-fit:cover}
.std-hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(20,14,9,.55));
  pointer-events:none;
}
.std-hero-media figcaption{
  position:absolute;
  z-index:2;
  left:16px;right:16px;bottom:14px;
  font-size:9.5px;
  letter-spacing:.08em;
  color:rgba(250,244,232,.78);
}
.std-hero-badge{
  position:absolute;
  z-index:2;
  top:16px;right:16px;
  width:78px;height:78px;
  border:1px solid rgba(232,115,28,.55);
  border-radius:50%;
  background:rgba(31,25,19,.62);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  display:grid;
  place-content:center;
  text-align:center;
  font-family:var(--latin);
  font-size:17px;
  letter-spacing:.06em;
  color:var(--yolk-soft);
}
.std-hero-badge small{display:block;margin-top:3px;font-family:var(--sans);font-size:7.5px;letter-spacing:.1em;color:rgba(250,244,232,.55)}

/* ---------- body ---------- */
.std-body{padding:clamp(56px,7vw,84px) 0 0;background:var(--bg)}
.std-grid{
  display:grid;
  grid-template-columns:220px minmax(0,1fr);
  gap:clamp(32px,6vw,80px);
  align-items:start;
}
.std-side{position:sticky;top:104px;display:flex;flex-direction:column;gap:30px}
.std-toc,.std-cross{padding-top:16px;border-top:1px solid var(--line)}
.std-toc .eyebrow,.std-cross .eyebrow{font-size:9px;letter-spacing:.18em;margin-bottom:10px}
.std-toc a,.std-cross a{
  display:block;
  padding:8px 0;
  border-bottom:1px solid var(--line-soft);
  color:var(--muted);
  font-size:11.5px;
  line-height:1.5;
  text-decoration:none;
  transition:.25s;
}
.std-toc a:hover,.std-toc a.is-active{color:var(--yolk-deep)}
.std-cross a{color:var(--ink-2)}
.std-cross a span{display:inline-block;width:18px;font-family:var(--latin);font-size:9px;color:var(--muted)}
.std-cross a:hover{color:var(--yolk-deep)}
.std-back{font-size:10.5px;letter-spacing:.06em;color:var(--muted);text-decoration:none}
.std-back:hover{color:var(--yolk-deep)}

.std-prose{max-width:760px;min-width:0}
.std-prose h2{
  margin:60px 0 18px;
  padding-top:26px;
  border-top:1px solid var(--line);
  font-family:var(--serif);
  font-size:clamp(1.55rem,2.5vw,2.05rem);
  font-weight:400;
  line-height:1.35;
  letter-spacing:.02em;
  scroll-margin-top:100px;
}
.std-prose h2:first-child{margin-top:0;padding-top:0;border-top:0}
.std-prose h3{margin:30px 0 10px;font-size:15.5px;font-weight:500;letter-spacing:.04em}
.std-prose p{margin:0 0 18px;font-size:14px;font-weight:300;line-height:2;color:var(--ink-2)}
.std-prose strong{font-weight:500;color:var(--ink)}
.std-prose a{color:var(--yolk-deep);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:.5px}
.std-prose ul,.std-prose ol{margin:0 0 18px;padding-left:1.2em}
.std-prose li{margin-bottom:9px;font-size:13.5px;line-height:1.9;color:var(--ink-2)}
.std-prose li::marker{color:var(--yolk-deep)}
.std-intro{font-family:var(--serif);font-size:17px;line-height:2;color:var(--ink)}
.std-kicker{
  display:block;
  margin-bottom:10px;
  font-family:var(--latin);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--yolk-deep);
}

.table-wrap{margin:24px 0;overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--paper)}
.table-hint{display:none}
.std-table{width:100%;min-width:620px;border-collapse:collapse;font-size:12px}
.std-table th{
  padding:11px 13px;
  border-bottom:1px solid var(--line);
  background:rgba(35,27,19,.04);
  text-align:left;
  font-size:10px;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--ink-2);
  white-space:nowrap;
}
.std-table td{padding:10px 13px;border-bottom:1px solid var(--line-soft);line-height:1.7;color:var(--ink-2);vertical-align:top}
.std-table tr:last-child td{border-bottom:0}
.std-table--num td:first-child{font-family:var(--latin);font-size:11px;color:var(--muted);width:42px}
.std-table .ok{color:#4a6b46;white-space:nowrap}
.std-note{margin:-12px 0 22px;font-size:10px;line-height:1.7;color:var(--muted)}

.callout{
  margin:28px 0;
  padding:20px 22px;
  border-left:2px solid var(--yolk);
  border-radius:0 10px 10px 0;
  background:rgba(232,115,28,.055);
}
.callout strong{display:block;margin-bottom:6px;font-size:11px;letter-spacing:.14em;color:var(--yolk-deep)}
.callout p{margin:0;font-size:13px;line-height:1.9;color:var(--ink-2)}
.callout--dark{background:rgba(35,27,19,.04);border-left-color:var(--ink);}
.callout--dark strong{color:var(--ink)}

.std-steps{display:grid;gap:0;margin:24px 0}
.std-step{display:grid;grid-template-columns:52px 1fr;gap:18px;padding:18px 0;border-top:1px solid var(--line)}
.std-step:last-child{border-bottom:1px solid var(--line)}
.std-step > span{font-family:var(--latin);font-size:12px;letter-spacing:.1em;color:var(--yolk-deep);padding-top:2px}
.std-step h3{margin:0 0 6px;font-size:14.5px;font-weight:500;letter-spacing:.04em}
.std-step p{margin:0;font-size:12.5px;line-height:1.85;color:var(--muted)}

.std-figure{margin:28px 0;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--paper)}
.std-figure img{width:100%;height:auto;border:1px solid var(--line-soft);border-radius:4px}
.std-figure figcaption{margin-top:10px;font-size:10px;line-height:1.7;color:var(--muted);text-align:center}
.std-report{display:grid;grid-template-columns:170px 1fr;gap:22px;align-items:center;margin:28px 0;padding:18px;border:1px solid var(--line);border-radius:12px;background:var(--paper)}
.std-report img{width:100%;height:auto;border:1px solid var(--line-soft)}
.std-report h4{margin:0 0 8px;font-family:var(--serif);font-size:17px;font-weight:400}
.std-report p{margin:0 0 10px;font-size:11.5px;line-height:1.8;color:var(--muted)}
.std-report a{font-size:11px;color:var(--yolk-deep);text-decoration:none;letter-spacing:.04em}

/* ---------- faq (reuses main.css) ---------- */
.std-faq .faq-side .sec-title{font-size:clamp(1.9rem,3.4vw,2.7rem)}
.std-faq .faq-side .eyebrow{white-space:normal}

/* ---------- cross links ---------- */
.std-cross-section{padding:clamp(64px,8vw,100px) 0;background:var(--paper)}
.std-cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:36px}
.std-cross-card{
  display:flex;
  flex-direction:column;
  padding:24px;
  border:1px solid var(--line);
  border-radius:14px;
  color:var(--ink);
  text-decoration:none;
  transition:transform .45s var(--ease),border-color .45s,box-shadow .45s;
}
.std-cross-card:hover{transform:translateY(-5px);border-color:rgba(232,115,28,.4);box-shadow:0 30px 50px -40px rgba(60,35,10,.45)}
.std-cross-card > span{font-family:var(--latin);font-size:10px;letter-spacing:.14em;color:var(--yolk-deep)}
.std-cross-card h3{margin:16px 0 8px;font-family:var(--serif);font-size:19px;font-weight:400;line-height:1.4}
.std-cross-card p{margin:0;font-size:11.5px;line-height:1.8;color:var(--muted)}
.std-cross-card i{margin-top:20px;font-style:normal;font-size:10px;letter-spacing:.12em;color:var(--ink-2)}

/* ---------- compact cta ---------- */
.std-cta{padding:clamp(56px,7vw,72px) 0;background:#1E1811;color:var(--paper);position:relative;overflow:hidden}
.std-cta::before{
  content:"";
  position:absolute;
  left:-10%;bottom:-120%;
  width:50vw;height:50vw;
  background:radial-gradient(circle,rgba(232,115,28,.22),transparent 62%);
  pointer-events:none;
}
.std-cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px}
.std-cta h2{margin:0 0 10px;font-family:var(--serif);font-size:clamp(1.9rem,3.4vw,2.9rem);font-weight:300;line-height:1.2}
.std-cta p{margin:0;font-size:12px;color:rgba(250,244,232,.55)}
.std-cta-actions{display:flex;gap:10px;flex-wrap:wrap}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .std-hero{padding:112px 0 60px}
  .std-hero-grid{grid-template-columns:1fr;gap:38px}
  .std-hero-media{max-width:580px;width:100%;margin-inline:auto}
  .std-grid{grid-template-columns:minmax(0,1fr);gap:34px}
  .std-side{position:static;display:grid;grid-template-columns:1fr 1fr;gap:26px}
  .std-side .std-back{display:none}
  .std-prose{max-width:none}
  .std-cross-grid{grid-template-columns:1fr 1fr}
  .std-cta-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:768px){
  .std-hero{padding:100px 0 48px}
  .breadcrumb{margin-bottom:28px}
  .std-hero h1{font-size:clamp(2.5rem,10.5vw,3.6rem)}
  .std-facts{grid-template-columns:1fr 1fr;gap:18px}
  .std-body{padding-top:48px}
  .std-prose h2{margin-top:46px}
  .std-cross-grid{grid-template-columns:1fr}
  .std-report{grid-template-columns:1fr}
  .std-report img{max-width:200px}
  .std-table{min-width:560px}
  .table-hint{display:block;margin:0 0 8px;text-align:right;font-size:9.5px;letter-spacing:.06em;color:var(--muted)}
}
@media (max-width:640px){
  .std-side{grid-template-columns:1fr}
  .std-cross{display:none}
  .std-facts b{font-size:22px}
  .std-hero-media figcaption{font-size:8.5px}
  .std-hero-badge{width:66px;height:66px;font-size:14px}
  .std-cta-actions .btn{width:100%;justify-content:space-between}
}