/* QingYuan Site — Clean B2B style
   Palette: 米黄底 #F5EDD8 + 朱红 #C0392B + 深色文字
*/

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

:root {
  --bg: #F5EDD8;
  --bg-alt: #EFE5C8;
  --accent: #C0392B;
  --accent-dark: #962d22;
  --text: #2A2A2A;
  --text-muted: #6B6B6B;
  --border: #E0D6B8;
  --card-bg: #FFFCF3;
  --white: #FFFFFF;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header / Nav ===== */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  font-size: 20px;
}
.brand-mark {
  background: var(--accent);
  color: #fff;
  width: 36px; height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.brand-name { letter-spacing: 0.5px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  color: var(--text);
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ===== Hero ===== */
.hero {
  padding: 80px 0 100px;
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 100%);
  border-bottom: 1px solid var(--border);
}
.hero-inner { max-width: 760px; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: 44px;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--text);
  font-weight: 700;
}
.lead {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 32px;
}
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  transition: all 0.15s;
  cursor: pointer;
  text-align: center;
}
.btn-primary {
  background: var(--accent);
  color: #fff !important;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}
.btn-secondary {
  background: transparent;
  color: var(--text) !important;
  border-color: var(--text);
}
.btn-secondary:hover {
  background: var(--text);
  color: var(--bg) !important;
}
.btn-large { padding: 16px 32px; font-size: 16px; }
.btn-block { display: block; width: 100%; }

/* ===== Page Hero (sub pages) ===== */
.page-hero {
  padding: 60px 0;
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 100%);
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-size: 36px;
  margin-bottom: 12px;
  font-weight: 700;
}
.page-hero p {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 680px;
}

/* ===== Sections ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-title {
  text-align: center;
  font-size: 32px;
  margin-bottom: 48px;
  font-weight: 700;
  color: var(--text);
}

/* ===== Grid 3 (Why us) ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px 24px;
  text-align: center;
}
.card-icon {
  font-size: 36px;
  margin-bottom: 16px;
}
.card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--text);
}
.card p { color: var(--text-muted); font-size: 15px; }

/* ===== About ===== */
.about-text {
  max-width: 760px;
  margin: 0 auto 16px;
  font-size: 16px;
  color: var(--text);
  text-align: center;
}

/* ===== CTA Strip ===== */
.cta-strip {
  background: var(--accent);
  color: #fff;
  padding: 60px 0;
}
.cta-strip-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-strip h2 {
  font-size: 26px;
  color: #fff;
  margin: 0;
}
.cta-strip .btn-primary {
  background: #fff;
  color: var(--accent) !important;
  border-color: #fff;
}
.cta-strip .btn-primary:hover {
  background: var(--bg);
  border-color: var(--bg);
}

/* ===== Product Grid ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.product-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.product-image {
  background: #D9D2BB;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--border);
}
.product-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.product-body h3 {
  font-size: 19px;
  margin-bottom: 10px;
  color: var(--text);
}
.product-body p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 20px;
  flex: 1;
}

/* ===== Kontak ===== */
.kontak-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.kontak-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 24px;
}
.kontak-card h2 {
  font-size: 20px;
  margin-bottom: 12px;
  color: var(--text);
}
.kontak-card p { color: var(--text-muted); font-size: 15px; margin-bottom: 8px; }
.kontak-info {
  font-size: 17px !important;
  font-weight: 600;
  color: var(--accent) !important;
}
.kontak-primary { border-color: var(--accent); border-width: 2px; }
.kontak-primary .btn-whatsapp { margin-top: 12px; }
.btn-whatsapp { background: #25D366; border-color: #25D366; }
.btn-whatsapp:hover { background: #1ebd5a; border-color: #1ebd5a; }
.muted { font-size: 13px !important; color: var(--text-muted) !important; margin-top: 8px !important; }

/* ===== Check List ===== */
.check-list {
  list-style: none;
  max-width: 720px;
  margin: 0 auto;
}
.check-list li {
  padding: 12px 0 12px 32px;
  position: relative;
  font-size: 16px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.check-list li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 18px;
}

/* ===== Footer ===== */
.site-footer {
  background: #2A2418;
  color: #D9D2BB;
  padding: 50px 0 24px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 40px;
  margin-bottom: 32px;
}
.footer .brand { color: #fff; }
.footer .brand-name { color: #fff; }
.footer-tagline {
  margin-top: 10px;
  font-size: 14px;
  color: #A89F86;
}
.footer-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.footer-cols h4 {
  color: #fff;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 14px;
}
.footer-cols a {
  display: block;
  color: #D9D2BB;
  margin-bottom: 8px;
  font-size: 14px;
}
.footer-cols a:hover { color: #fff; }
.footer-cols p {
  font-size: 14px;
  margin-bottom: 6px;
  color: #D9D2BB;
}
.copyright {
  padding-top: 24px;
  border-top: 1px solid #4A4232;
  font-size: 13px;
  color: #A89F86;
  text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero h1 { font-size: 28px; }
  .hero { padding: 50px 0 60px; }
  .section { padding: 50px 0; }
  .section-title { font-size: 26px; margin-bottom: 32px; }
  .page-hero { padding: 40px 0; }
  .page-hero h1 { font-size: 28px; }
  .nav { padding: 14px 20px; }
  .nav-links { gap: 18px; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr; }
  .cta-strip-inner { flex-direction: column; text-align: center; }
}