/* ============================================================
   Jiameihao Bio — bio.jiameihao.cn
   Green bio-tech B2B theme for international buyers
   ============================================================ */
:root {
  --green-950: #052e16;
  --green-900: #14532d;
  --green-800: #166534;
  --green-700: #15803d;
  --green-600: #16a34a;
  --green-500: #22c55e;
  --green-100: #dcfce7;
  --green-50: #f0fdf4;
  --sand-bg: #fafaf7;
  --ink: #1a2b20;
  --muted: #55675c;
  --line: #dde7df;
  --white: #ffffff;
  --amber: #d97706;
  --maxw: 1180px;
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--sand-bg);
  line-height: 1.65;
  font-size: 17px;
}

img { max-width: 100%; height: auto; display: block; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img.logo-graphic { width: 38px; height: 38px; }
.brand-name {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--green-900);
  letter-spacing: 0.2px;
  line-height: 1.2;
}
.brand-name small {
  display: block;
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 1.4px;
  text-transform: uppercase;
}
.main-nav ul { list-style: none; display: flex; align-items: center; gap: 4px; }
.main-nav a {
  display: block;
  padding: 10px 13px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 8px;
}
.main-nav a:hover { background: var(--green-50); color: var(--green-800); }
.main-nav a.active { color: var(--green-800); background: var(--green-100); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 11px;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--green-900); border-radius: 2px; }

.header-cta {
  background: var(--green-700);
  color: #fff !important;
  padding: 10px 18px !important;
  border-radius: 999px !important;
  font-weight: 600 !important;
  white-space: nowrap;
}
.header-cta:hover { background: var(--green-800) !important; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--green-950) 0%, var(--green-800) 58%, var(--green-700) 100%);
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -140px;
  top: -140px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(34, 197, 94, 0.28) 0%, transparent 65%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; padding: 84px 24px 92px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  line-height: 1.14;
  font-weight: 800;
  max-width: 860px;
  letter-spacing: -0.5px;
}
.hero h1 .accent { color: #86efac; }
.hero p.sub {
  margin-top: 22px;
  font-size: 1.14rem;
  max-width: 720px;
  color: #d3ead9;
}
.hero-actions { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(0, 0, 0, 0.18); }
.btn-primary { background: var(--green-500); color: var(--green-950); }
.btn-outline-light { border: 2px solid rgba(255, 255, 255, 0.65); color: #fff; }

.hero-stats {
  margin-top: 54px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 900px;
}
.stat-item { border-left: 3px solid var(--green-500); padding-left: 16px; }
.stat-item b { display: block; font-size: 1.7rem; font-weight: 800; color: #fff; line-height: 1.2; }
.stat-item span { font-size: 0.88rem; color: #bcdcc6; }

/* ---------- Sections ---------- */
.section { padding: 76px 0; }
.section.tinted { background: var(--white); }
.section-head { max-width: 780px; margin-bottom: 46px; }
.section-kicker {
  color: var(--green-700);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.82rem;
  margin-bottom: 12px;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  color: var(--green-950);
  line-height: 1.25;
  letter-spacing: -0.3px;
}
.section-head p { margin-top: 14px; color: var(--muted); font-size: 1.05rem; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; align-items: center; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover { box-shadow: 0 10px 28px rgba(20, 83, 45, 0.10); transform: translateY(-3px); }
.card h3 { color: var(--green-900); font-size: 1.15rem; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 0.97rem; }
.card .card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--green-50);
  border-radius: 12px;
  margin-bottom: 18px;
}

/* feature rows */
.feature-row { display: flex; gap: 20px; align-items: flex-start; margin-top: 26px; }
.feature-row .f-icon {
  flex: 0 0 52px;
  width: 52px; height: 52px;
  background: var(--green-100);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.55rem;
}
.feature-row h3 { font-size: 1.08rem; color: var(--green-900); margin-bottom: 6px; }
.feature-row p { color: var(--muted); font-size: 0.97rem; }

/* checkmark list */
.checklist { list-style: none; margin-top: 18px; }
.checklist li {
  position: relative;
  padding-left: 32px;
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 1rem;
}
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 1px;
  width: 21px; height: 21px;
  background: var(--green-100);
  color: var(--green-800);
  font-weight: 800;
  font-size: 0.8rem;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}

/* ---------- Page hero (subpages) ---------- */
.page-hero {
  background: linear-gradient(120deg, var(--green-950), var(--green-800));
  color: #fff;
  padding: 56px 0;
}
.breadcrumbs {
  font-size: 0.88rem;
  color: #a7cbb2;
  margin-bottom: 16px;
}
.breadcrumbs a { color: #cfe9d7; text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; }
.page-hero h1 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); line-height: 1.2; }
.page-hero p.lead { margin-top: 14px; max-width: 720px; color: #cde6d5; font-size: 1.06rem; }

/* ---------- Product cards ---------- */
.product-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  text-decoration: none;
}
.product-card:hover { box-shadow: 0 12px 30px rgba(20, 83, 45, 0.13); transform: translateY(-4px); }
.product-card .pc-thumb {
  height: 150px;
  background: linear-gradient(135deg, var(--green-800), var(--green-600));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}
.product-card .pc-body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.pc-tag {
  align-self: flex-start;
  background: var(--green-50);
  color: var(--green-800);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: 999px;
  padding: 4px 11px;
  margin-bottom: 10px;
}
.product-card h3 { color: var(--green-950); font-size: 1.13rem; line-height: 1.35; margin-bottom: 8px; }
.product-card p { color: var(--muted); font-size: 0.93rem; flex: 1; }
.pc-spec {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 0.85rem;
  color: var(--green-700);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.pc-spec .arrow { color: var(--green-600); }

/* ---------- Spec table ---------- */
.spec-table { width: 100%; border-collapse: collapse; margin: 26px 0; background: var(--white); border-radius: var(--radius); overflow: hidden; }
.spec-table th, .spec-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); font-size: 0.96rem; vertical-align: top; }
.spec-table th { background: var(--green-50); color: var(--green-900); width: 220px; font-weight: 700; }
.spec-table tr:last-child td { border-bottom: none; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--green-900), var(--green-700));
  color: #fff;
  border-radius: 20px;
  padding: 52px 48px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.cta-band h2 { font-size: 1.7rem; line-height: 1.3; max-width: 640px; }
.cta-band p { color: #c8e5d1; margin-top: 10px; max-width: 640px; }

/* ---------- Contact form ---------- */
.contact-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 44px; align-items: start; }
.contact-form-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 34px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 7px; color: var(--green-950); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 0.98rem;
  font-family: inherit;
  background: var(--sand-bg);
  color: var(--ink);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: 2px solid var(--green-500);
  border-color: var(--green-500);
}
.info-line { display: flex; gap: 14px; margin-bottom: 22px; align-items: flex-start; }
.info-line .i-icon {
  flex: 0 0 42px;
  width: 42px; height: 42px;
  background: var(--green-100);
  border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}
.info-line b { display: block; color: var(--green-950); font-size: 0.95rem; }
.info-line span { color: var(--muted); font-size: 0.95rem; word-break: break-all; }

.form-status { display: none; background: var(--green-50); border: 1px solid var(--green-500); color: var(--green-900); border-radius: 9px; padding: 12px 16px; margin-bottom: 18px; font-size: 0.95rem; }
.form-status.show { display: block; }

/* ---------- FAQ accordion ---------- */
.faq-item { background: var(--white); border: 1px solid var(--line); border-radius: 12px; margin-bottom: 14px; overflow: hidden; }
.faq-item summary {
  cursor: pointer;
  padding: 18px 22px;
  font-weight: 600;
  color: var(--green-950);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 1.02rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.5rem; color: var(--green-600); font-weight: 400; transition: transform 0.2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-a { padding: 0 22px 20px; color: var(--muted); font-size: 0.98rem; }

/* ---------- Steps ---------- */
.steps { counter-reset: step; }
.step {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px 26px 26px;
}
.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--green-600);
  letter-spacing: 1px;
}
.step h3 { margin: 8px 0 8px; color: var(--green-950); font-size: 1.12rem; }
.step p { color: var(--muted); font-size: 0.95rem; }

/* ---------- Footer ---------- */
.site-footer { background: var(--green-950); color: #b9d4c2; margin-top: 80px; }
.footer-inner { padding: 58px 24px 40px; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 38px; }
.footer-inner h4 { color: #fff; font-size: 0.98rem; margin-bottom: 16px; letter-spacing: 0.4px; }
.footer-inner ul { list-style: none; }
.footer-inner li { margin-bottom: 10px; }
.footer-inner a { color: #b9d4c2; text-decoration: none; font-size: 0.93rem; }
.footer-inner a:hover { color: #fff; text-decoration: underline; }
.footer-brand p { font-size: 0.93rem; margin-top: 14px; max-width: 300px; color: #93b8a0; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding: 20px 24px; text-align: center; font-size: 0.85rem; color: #7fa98c; }
.footer-bottom a { color: #a9cdb5; }

/* ---------- Misc ---------- */
.note-box {
  background: var(--green-50);
  border-left: 4px solid var(--green-600);
  border-radius: 0 10px 10px 0;
  padding: 16px 20px;
  color: var(--green-950);
  font-size: 0.95rem;
  margin: 24px 0;
}
.badge-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.badge {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green-800);
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.lang-switch { font-size: 0.88rem; color: var(--muted); text-decoration: none; white-space: nowrap; }
.lang-switch:hover { color: var(--green-800); }

.prose { max-width: 800px; }
.prose p { margin-bottom: 18px; color: #33463b; }
.prose h2 { margin: 36px 0 16px; color: var(--green-950); }
.prose h3 { margin: 28px 0 12px; color: var(--green-900); }
.prose ul { margin: 0 0 18px 22px; color: #33463b; }

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 780px) {
  body { font-size: 16px; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 14px 24px rgba(0,0,0,0.08);
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; align-items: stretch; padding: 10px 16px; gap: 0; }
  .main-nav a { padding: 13px 10px; }
  .nav-toggle { display: flex; }
  .grid-3, .grid-2, .contact-grid, .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .hero-inner { padding: 60px 24px 64px; }
  .section { padding: 56px 0; }
  .cta-band { padding: 36px 28px; }
  .header-cta { display: none; }
}