/* ===== 华海农科 官网样式 ===== */

:root {
  --color-primary: #15803D;
  --color-primary-dark: #14532D;
  --color-primary-light: #22C55E;
  --color-accent: #CA8A04;
  --color-accent-light: #EAB308;
  --color-bg: #F0FDF4;
  --color-bg-alt: #FFFFFF;
  --color-bg-dark: #052E16;
  --color-text: #14532D;
  --color-text-muted: #475569;
  --color-text-inverse: #F0FDF4;
  --color-border: #D1FAE5;
  --color-border-strong: #86EFAC;

  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Lexend", "Noto Sans SC", "PingFang SC", sans-serif;

  --shadow-sm: 0 1px 2px 0 rgba(20, 83, 45, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(20, 83, 45, 0.08), 0 2px 4px -2px rgba(20, 83, 45, 0.05);
  --shadow-lg: 0 20px 40px -12px rgba(20, 83, 45, 0.15);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --container: 1200px;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg-alt);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color 200ms ease; }
a:hover { color: var(--color-primary-dark); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-primary-dark);
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4vw, 3.25rem); font-weight: 700; }
h2 { font-size: clamp(1.625rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p { color: var(--color-text); margin-bottom: 1rem; }

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

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand-text .zh { font-weight: 700; color: var(--color-primary-dark); font-size: 16px; }
.brand-text .en { font-size: 11px; color: var(--color-text-muted); letter-spacing: 0.08em; text-transform: uppercase; }

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 15px;
  font-weight: 500;
  transition: background 200ms, color 200ms;
}
.nav a:hover { background: var(--color-bg); color: var(--color-primary-dark); }
.nav a.active { color: var(--color-primary); background: var(--color-bg); }

.nav-cta {
  background: var(--color-primary);
  color: var(--color-text-inverse) !important;
  padding: 9px 18px !important;
  border-radius: var(--radius-md) !important;
  font-weight: 600;
}
.nav-cta:hover { background: var(--color-primary-dark); color: var(--color-text-inverse) !important; }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border-strong);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle svg { width: 22px; height: 22px; stroke: var(--color-primary-dark); }

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(60px, 10vw, 120px) 0;
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(34, 197, 94, 0.18), transparent 60%),
    radial-gradient(800px 400px at 10% 110%, rgba(202, 138, 4, 0.10), transparent 55%),
    linear-gradient(180deg, #F0FDF4 0%, #FFFFFF 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero .kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(21, 128, 61, 0.08);
  color: var(--color-primary-dark);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}
.hero .kicker::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-primary-light);
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.2);
}

.hero p.lead {
  font-size: clamp(16px, 1.5vw, 18px);
  color: var(--color-text-muted);
  margin: 20px 0 32px;
  max-width: 560px;
}

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all 200ms ease;
  border: 1px solid transparent;
  font-family: inherit;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover { background: var(--color-primary-dark); color: var(--color-text-inverse); box-shadow: var(--shadow-md); }
.btn-secondary {
  background: var(--color-bg-alt);
  color: var(--color-primary-dark);
  border-color: var(--color-border-strong);
}
.btn-secondary:hover { background: var(--color-bg); border-color: var(--color-primary); }

.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 440px;
  margin-left: auto;
}
.hero-visual .logo-circle {
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background: var(--color-bg-alt);
  box-shadow: var(--shadow-lg);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.hero-visual .logo-circle img { width: 70%; height: 70%; object-fit: contain; }
.hero-visual .ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px dashed rgba(21, 128, 61, 0.3);
  animation: spin 30s linear infinite;
}
.hero-visual .ring.ring-2 { inset: 6%; animation-duration: 45s; animation-direction: reverse; border-color: rgba(202, 138, 4, 0.25); }

@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  .hero-visual .ring { animation: none; }
}

/* ===== Section base ===== */
.section { padding: clamp(64px, 8vw, 96px) 0; }
.section-alt { background: var(--color-bg); }
.section-dark {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, #052E16 100%);
  color: var(--color-text-inverse);
}
.section-dark h2, .section-dark h3, .section-dark h4 { color: var(--color-text-inverse); }
.section-dark p { color: rgba(240, 253, 244, 0.85); }

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-header .eyebrow {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}
.section-header p {
  color: var(--color-text-muted);
  margin-top: 16px;
  font-size: 17px;
}

/* ===== Stats ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.stat-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: transform 200ms, box-shadow 200ms;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat-card .number {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-card .number .unit { font-size: 0.55em; color: var(--color-accent); margin-left: 4px; }
.stat-card .label { color: var(--color-text-muted); font-size: 14px; }

/* ===== Cards grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: transform 200ms, box-shadow 200ms, border-color 200ms;
  cursor: default;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-strong);
}
.card .icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--color-bg);
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  color: var(--color-primary);
}
.card .icon svg { width: 26px; height: 26px; stroke: currentColor; fill: none; stroke-width: 2; }
.card h3 { margin-bottom: 12px; }
.card p { color: var(--color-text-muted); font-size: 15px; margin: 0; }

.card-accent .icon { background: rgba(202, 138, 4, 0.1); color: var(--color-accent); }

/* ===== Feature list ===== */
.feature-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.feature-split.reverse { direction: rtl; }
.feature-split.reverse > * { direction: ltr; }

.feature-list { list-style: none; margin-top: 24px; }
.feature-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.feature-list li:last-child { border-bottom: none; }
.feature-list .check {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: grid;
  place-items: center;
  margin-top: 2px;
}
.feature-list .check svg { width: 12px; height: 12px; stroke: currentColor; fill: none; stroke-width: 3; }
.feature-list strong { color: var(--color-primary-dark); display: block; margin-bottom: 2px; }
.feature-list span { color: var(--color-text-muted); font-size: 14px; }

.visual-panel {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-xl);
  padding: 48px;
  color: var(--color-text-inverse);
  aspect-ratio: 1 / 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.visual-panel::after {
  content: "";
  position: absolute;
  right: -80px; bottom: -80px;
  width: 280px; height: 280px;
  border-radius: 50%;
  background: rgba(202, 138, 4, 0.25);
  filter: blur(20px);
}
.visual-panel .big-num {
  font-family: var(--font-display);
  font-size: clamp(48px, 7vw, 80px);
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent-light);
}
.visual-panel h3 { color: white; margin-bottom: 12px; }
.visual-panel p { color: rgba(255, 255, 255, 0.85); position: relative; z-index: 1; }

/* ===== Timeline ===== */
.timeline { margin-top: 48px; position: relative; padding-left: 32px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
}
.timeline-item { position: relative; padding-bottom: 32px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px; top: 6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 3px solid var(--color-primary);
}
.timeline-item .year {
  font-family: var(--font-display);
  color: var(--color-accent);
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 4px;
}

/* ===== Page hero (inner pages) ===== */
.page-hero {
  padding: 80px 0 64px;
  background:
    radial-gradient(600px 300px at 80% 0%, rgba(34, 197, 94, 0.15), transparent 60%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  border-bottom: 1px solid var(--color-border);
}
.page-hero .breadcrumb {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}
.page-hero .breadcrumb a { color: var(--color-text-muted); }
.page-hero .breadcrumb a:hover { color: var(--color-primary); }
.page-hero h1 { max-width: 820px; margin-bottom: 16px; }
.page-hero p.intro { font-size: 18px; color: var(--color-text-muted); max-width: 760px; line-height: 1.8; }

/* ===== Prose block ===== */
.prose { max-width: 820px; margin: 0 auto; }
.prose p { font-size: 17px; line-height: 1.9; color: var(--color-text); margin-bottom: 1.5em; text-indent: 2em; }
.prose p:first-child { text-indent: 0; }
.prose h2 { margin: 2em 0 1em; }
.prose h3 { margin: 1.6em 0 0.8em; }

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 48px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 200ms, transform 200ms;
}
.contact-item:hover { border-color: var(--color-primary-light); transform: translateX(4px); }
.contact-item .icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-primary);
  display: grid;
  place-items: center;
}
.contact-item .icon svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 2; }
.contact-item .label { font-size: 13px; color: var(--color-text-muted); margin-bottom: 4px; }
.contact-item .value { color: var(--color-primary-dark); font-weight: 500; font-size: 15px; word-break: break-all; }
.contact-item a.value { color: var(--color-primary); }

.map-placeholder {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  min-height: 360px;
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
  padding: 32px;
  text-align: center;
  background-image:
    linear-gradient(135deg, rgba(21, 128, 61, 0.05) 0%, rgba(202, 138, 4, 0.05) 100%),
    radial-gradient(circle at 30% 40%, rgba(34, 197, 94, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(202, 138, 4, 0.08) 0%, transparent 50%);
}

/* ===== CTA block ===== */
.cta-block {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  border-radius: var(--radius-xl);
  padding: clamp(40px, 6vw, 72px);
  text-align: center;
  color: var(--color-text-inverse);
  position: relative;
  overflow: hidden;
}
.cta-block::before, .cta-block::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.4;
}
.cta-block::before { top: -100px; left: -100px; width: 300px; height: 300px; background: var(--color-primary-light); }
.cta-block::after { bottom: -100px; right: -100px; width: 300px; height: 300px; background: var(--color-accent); }
.cta-block > * { position: relative; z-index: 1; }
.cta-block h2 { color: white; }
.cta-block p { color: rgba(255, 255, 255, 0.9); max-width: 560px; margin: 16px auto 28px; font-size: 17px; }

.cta-block .btn-primary {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}
.cta-block .btn-primary:hover { background: var(--color-accent-light); color: var(--color-primary-dark); }
.cta-block .btn-secondary {
  background: transparent;
  color: white;
  border-color: rgba(255, 255, 255, 0.4);
}
.cta-block .btn-secondary:hover { background: rgba(255, 255, 255, 0.1); border-color: white; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(240, 253, 244, 0.75);
  padding: 64px 0 24px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(240, 253, 244, 0.1);
}
.footer-brand .brand-text .zh { color: white; }
.footer-brand .brand-text .en { color: rgba(240, 253, 244, 0.5); }
.footer-brand p { margin-top: 16px; color: rgba(240, 253, 244, 0.65); font-size: 13px; line-height: 1.7; }
.footer-legal { display: flex; flex-direction: column; gap: 4px; }
.footer-legal .address { color: rgba(240, 253, 244, 0.45); font-size: 12px; }
.footer-col h4 { color: white; font-size: 14px; font-weight: 600; margin-bottom: 16px; letter-spacing: 0.04em; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: rgba(240, 253, 244, 0.7); font-size: 13px; transition: color 200ms; }
.footer-col a:hover { color: white; }

.footer-bottom {
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  align-items: center;
  color: rgba(240, 253, 244, 0.55);
  font-size: 13px;
}
.footer-bottom a { color: rgba(240, 253, 244, 0.7); }
.footer-bottom a:hover { color: white; }
.icp-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid rgba(240, 253, 244, 0.15);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-grid, .feature-split, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .feature-split.reverse { direction: ltr; }
  .hero-visual { max-width: 320px; margin: 0 auto; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; background: white; padding: 16px; border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-md); gap: 4px; align-items: stretch; }
  .nav.open { display: flex; }
  .nav a { padding: 12px 16px; }
  .nav-toggle { display: block; }
}

@media (max-width: 540px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .visual-panel { aspect-ratio: auto; padding: 32px; }
}

/* Focus states */
a:focus-visible, button:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}