/* Regencore Biotech — navy + gold theme */
:root {
  --navy: #1a2a4f;
  --navy-dark: #0f1b36;
  --navy-light: #2b3f6b;
  --gold: #c89a3d;
  --gold-soft: #f4e8ce;
  --gold-light: #fbf6ea;
  --ink: #1b2238;
  --muted: #5a6480;
  --line: #e4e7ee;
  --bg: #ffffff;
  --bg-soft: #f7f8fb;
  --bg-navy: #10193a;
  --shadow-sm: 0 1px 2px rgba(15,27,54,0.06), 0 2px 6px rgba(15,27,54,0.05);
  --shadow-md: 0 6px 20px rgba(15,27,54,0.09), 0 2px 6px rgba(15,27,54,0.05);
  --shadow-lg: 0 20px 45px rgba(15,27,54,0.15);
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

html[lang="zh"] body {
  font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: 0.01em;
}

img { max-width: 100%; display: block; }
a { color: var(--navy); text-decoration: none; }
a:hover { color: var(--gold); }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { color: var(--navy); line-height: 1.25; margin: 0 0 16px; font-weight: 700; }
h1 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -0.01em; }
h2 { font-size: clamp(24px, 3vw, 34px); letter-spacing: -0.005em; }
h3 { font-size: 20px; }
h4 { font-size: 16px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--navy); }

p { margin: 0 0 14px; color: #2b354e; }

/* ---------- Top bar ---------- */
.topbar {
  background: var(--navy-dark);
  color: #d6deee;
  font-size: 13px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(200,154,61,0.3);
}
.topbar .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.topbar a { color: var(--gold-soft); }
.topbar a:hover { color: #fff; }

/* ---------- Header / nav ---------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
  box-shadow: var(--shadow-sm);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding-top: 14px; padding-bottom: 14px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {height: 60px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 18px; color: var(--navy); letter-spacing: 0.01em; font-weight: 800; }
.brand-text small { font-size: 11px; color: var(--gold); text-transform: uppercase; letter-spacing: 0.12em; font-weight: 600; }

.nav { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.nav a {
  padding: 9px 12px;
  color: var(--navy);
  font-weight: 500;
  font-size: 15px;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}
.nav a:hover { background: var(--gold-light); color: var(--navy); }
.nav a.active { color: var(--gold); }
.nav a.active.btn { color: #fff; }

.btn {
  display: inline-block;
  background: var(--navy);
  color: #fff;
  padding: 11px 20px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid var(--navy);
  cursor: pointer;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
}
.btn:hover { background: var(--navy-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-gold { background: var(--gold); border-color: var(--gold); color: #fff; }
.btn-gold:hover { background: #b28633; border-color: #b28633; color: #fff; }
.btn-outline { background: transparent; color: var(--navy); border: 1px solid var(--navy); }
.btn-outline:hover { background: var(--navy); color: #fff; }

.lang-toggle {
  margin-left: 8px;
  background: transparent;
  color: var(--navy);
  border: 1px solid var(--navy);
  padding: 7px 14px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.lang-toggle:hover { background: var(--navy); color: #fff; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(ellipse at top right, rgba(200,154,61,0.18), transparent 55%),
    radial-gradient(ellipse at bottom left, rgba(26,42,79,0.08), transparent 60%),
    linear-gradient(180deg, #fbfbfe 0%, #ffffff 100%);
  padding: 80px 0 70px;
  border-bottom: 1px solid var(--line);
}
.hero .container { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 60px; align-items: center; }
.hero .eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 14px;
}
.hero h1 { margin-bottom: 20px; }
.hero p.lead { font-size: 18px; color: var(--muted); margin-bottom: 28px; line-height: 1.6; }
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-art {
  display: flex; justify-content: center; align-items: center;
  filter: drop-shadow(0 20px 30px rgba(15,27,54,0.18));
}
.hero-art img { max-height: 460px; width: auto; }

@media (max-width: 860px) {
  .hero { padding: 60px 0 50px; }
  .hero .container { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-art img { max-height: 340px; }
  .hero-ctas { justify-content: center; }
}

/* ---------- Page head (inner pages) ---------- */
.page-head {
  background: linear-gradient(180deg, #fbfbfe 0%, #ffffff 100%);
  padding: 56px 0 38px;
  border-bottom: 1px solid var(--line);
}
.page-head .eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 12px;
}
.page-head h1 { margin-bottom: 10px; }
.page-head p { font-size: 17px; color: var(--muted); max-width: 780px; }

/* ---------- Sections ---------- */
section { padding: 60px 0; }
section.alt { background: var(--bg-soft); }
section.navy {
  background: linear-gradient(180deg, var(--navy-dark) 0%, var(--navy) 100%);
  color: #d7deee;
}
section.navy h2, section.navy h3 { color: #fff; }
section.navy p { color: #c3ccde; }
section.navy .eyebrow { color: var(--gold); }

.section-head { text-align: center; margin-bottom: 44px; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 10px;
}
.section-head h2 { margin-bottom: 10px; }
.section-head p { max-width: 720px; margin: 0 auto; color: var(--muted); font-size: 17px; }

/* ---------- Grid layouts ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 860px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---------- Card ---------- */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--gold); }
.card h3 { margin-bottom: 10px; color: var(--navy); }
.card p { color: var(--muted); margin-bottom: 0; }
.card .icon {
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--gold-light);
  color: var(--gold);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700;
  margin-bottom: 16px;
}

/* ---------- Bottle gallery ---------- */
.bottle-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  align-items: end;
}
.bottle-item {
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 14px 18px;
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}
.bottle-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--gold); }
.bottle-item .bottle-img {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  min-height: 240px;
  margin-bottom: 14px;
}
.bottle-item img { max-height: 240px; width: auto; }
.bottle-item .size {
  font-weight: 800;
  color: var(--navy);
  font-size: 20px;
  letter-spacing: 0.02em;
}
.bottle-item .sub {
  color: var(--gold);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  margin-top: 4px;
}
@media (max-width: 860px) {
  .bottle-grid { grid-template-columns: repeat(2, 1fr); }
  .bottle-item .bottle-img { min-height: 200px; }
  .bottle-item img { max-height: 200px; }
}

/* Bottle comparison (all 5 side by side, scale accurate) */
.bottle-compare {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 18px;
  padding: 24px 0 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.bottle-compare .bottle-cell { text-align: center; }
.bottle-compare .bottle-cell img { max-height: 340px; width: auto; }
.bottle-compare .bottle-cell .label {
  margin-top: 10px;
  font-weight: 700;
  color: var(--navy);
  font-size: 14px;
}

/* ---------- Feature list with check ---------- */
.feat-list { list-style: none; padding: 0; margin: 0; }
.feat-list li {
  padding: 10px 0 10px 28px;
  position: relative;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}
.feat-list li:last-child { border-bottom: none; }
.feat-list li::before {
  content: "✓";
  position: absolute; left: 0; top: 10px;
  color: var(--gold);
  font-weight: 700;
}

/* ---------- Spec table ---------- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.spec-table th, .spec-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}
.spec-table th {
  background: var(--navy);
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.spec-table tr:last-child td { border-bottom: none; }
.spec-table tr:nth-child(even) td { background: var(--bg-soft); }
.spec-table td strong { color: var(--navy); }

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stats .stat .num {
  font-size: 38px;
  font-weight: 800;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 6px;
}
.stats .stat .cap {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 600;
}
@media (max-width: 860px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(90deg, var(--navy) 0%, var(--navy-light) 100%);
  color: #fff;
  padding: 50px 0;
  text-align: center;
}
.cta-band h2 { color: #fff; margin-bottom: 10px; }
.cta-band p { color: #c3ccde; max-width: 620px; margin: 0 auto 22px; font-size: 17px; }
.cta-band .btn { background: var(--gold); border-color: var(--gold); }
.cta-band .btn:hover { background: #b28633; border-color: #b28633; }
.cta-band .btn-outline { background: transparent; color: #fff; border-color: #fff; margin-left: 10px; }
.cta-band .btn-outline:hover { background: #fff; color: var(--navy); }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--line); }
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 18px 4px;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--navy);
  font-size: 16px;
  list-style: none;
  padding-right: 30px;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 6px; top: 50%;
  transform: translateY(-50%);
  color: var(--gold);
  font-size: 22px;
  font-weight: 700;
}
.faq details[open] summary::after { content: "–"; }
.faq p { color: var(--muted); margin: 12px 0 0; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 50px;
}
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; gap: 34px; } }

.info-row {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.info-row:last-child { border-bottom: none; }
.info-label {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 4px;
}
.divider { height: 1px; background: var(--line); margin: 24px 0; }

.form { display: flex; flex-direction: column; gap: 14px; }
.form>div{
	display:flex;
}
.form label { font-size: 13px; font-weight: 600; color: var(--navy); margin-bottom: 4px; min-width:120px;}
.form input, .form select, .form textarea {
  font-family: inherit;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
  width:100%;
}
.form input:focus, .form select:focus, .form textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(200,154,61,0.18);
  outline: none;
}
.form textarea { min-height: 140px; resize: vertical; }
.form button.btn { align-self: flex-start; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-navy);
  color: #c6cde0;
  padding: 50px 0 22px;
}
.site-footer h4 { color: #fff; font-size: 13px; letter-spacing: 0.12em; margin-bottom: 14px; }
.site-footer a { color: #c6cde0; }
.site-footer a:hover { color: var(--gold); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 34px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { padding: 5px 0; font-size: 14px; }
.footer-bottom {
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: #8a93aa;
}
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; } }

/* ---------- Misc helpers ---------- */
.center { text-align: center; }
.mt-lg { margin-top: 32px; }
.pill {
  display: inline-block;
  background: var(--gold-light);
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(200,154,61,0.35);
}

/* Label showcase for product page */
.showcase {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 50px;
  align-items: center;
}
.showcase img { max-height: 420px; margin: 0 auto; filter: drop-shadow(0 18px 28px rgba(15,27,54,0.18)); }
.showcase ul.feat-list li { font-size: 15.5px; }
@media (max-width: 860px) { .showcase { grid-template-columns: 1fr; gap: 34px; } }
@media (max-width: 660px) {
	.site-header .container{
		display:block;
	}
}