/* ===== 南粤野生动植物科技 · 企业官网样式 ===== */
:root {
  --green-dark: #1F6B3B;
  --green: #3E9B5F;
  --green-light: #E7F2EA;
  --bg: #F7F9F5;
  --ink: #2C3E33;
  --ink-light: #5C6B60;
  --white: #FFFFFF;
  --radius: 12px;
  --shadow: 0 8px 28px rgba(31, 107, 59, 0.08);
  --header-h: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { display: block; width: 100%; height: 100%; object-fit: cover; }
a { text-decoration: none; color: inherit; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  transition: box-shadow .3s ease;
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(31, 107, 59, 0.12); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.logo { display: flex; align-items: center; gap: 11px; }
.logo-img { width: 42px; height: 42px; flex: none; object-fit: contain; }
.logo-text { display: flex; flex-direction: column; line-height: 1.3; }
.logo-text strong { font-size: 17px; color: var(--green-dark); letter-spacing: 1px; }
.logo-text em { font-style: normal; font-size: 10px; color: var(--ink-light); letter-spacing: 1.5px; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link {
  padding: 8px 16px; font-size: 15px; color: var(--ink);
  border-radius: 8px; transition: color .25s, background .25s;
}
.nav-link:hover, .nav-link.active { color: var(--green-dark); background: var(--green-light); }
.nav-cta {
  margin-left: 8px; color: var(--white); background: var(--green-dark);
}
.nav-cta:hover { color: var(--white); background: var(--green); }
.nav-cta.active { color: var(--white); background: var(--green); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 8px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--green-dark); transition: .3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 首屏 Banner ===== */
.hero { position: relative; min-height: 640px; display: flex; align-items: center; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  transform: scale(1.05);
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(16, 54, 32, 0.78) 0%, rgba(16, 54, 32, 0.45) 55%, rgba(16, 54, 32, 0.2) 100%);
}
.hero-content { position: relative; z-index: 2; color: var(--white); padding-top: var(--header-h); }
.hero-tag {
  display: inline-block; font-size: 14px; letter-spacing: 3px;
  padding: 6px 16px; border: 1px solid rgba(255,255,255,.5); border-radius: 999px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: 52px; line-height: 1.25; letter-spacing: 4px;
  font-weight: 700; margin-bottom: 20px; text-shadow: 0 4px 24px rgba(0,0,0,.25);
}
.hero-sub { max-width: 560px; font-size: 16px; color: rgba(255,255,255,.88); margin-bottom: 36px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 13px 34px; border-radius: 999px;
  font-size: 15px; letter-spacing: 2px; cursor: pointer; border: 1px solid transparent;
  transition: transform .25s, box-shadow .25s, background .25s, color .25s;
}
.btn-primary { background: var(--green); color: var(--white); box-shadow: 0 8px 20px rgba(62,155,95,.35); }
.btn-primary:hover { background: var(--green-dark); transform: translateY(-2px); }
.btn-outline { border-color: rgba(255,255,255,.8); color: var(--white); }
.btn-outline:hover { background: rgba(255,255,255,.15); transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ===== 通用区块 ===== */
.section { padding: 92px 0; }
.section-head { text-align: center; margin-bottom: 52px; }
.section-title {
  position: relative; display: inline-block;
  font-size: 32px; color: var(--ink); letter-spacing: 4px; padding-left: 18px;
}
.section-title::before {
  content: ""; position: absolute; left: 0; top: 8px; bottom: 8px;
  width: 5px; border-radius: 3px; background: var(--green-dark);
}
.section-desc { margin-top: 10px; font-size: 13px; letter-spacing: 5px; color: var(--green); }

/* ===== 关于我们 ===== */
.about { background: var(--white); }
.about-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.about-text p { color: var(--ink-light); margin-bottom: 16px; }
.about-text strong { color: var(--green-dark); font-weight: 600; }
.about-facts {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 30px;
}
.fact {
  background: var(--green-light); border-radius: var(--radius);
  padding: 18px 10px; text-align: center;
}
.fact b { display: block; font-size: 22px; color: var(--green-dark); }
.fact span { font-size: 12px; color: var(--ink-light); }
.about-media { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); aspect-ratio: 4/3; }
.about-media-card {
  position: absolute; left: 18px; bottom: 18px; right: 18px;
  background: rgba(255,255,255,.92); backdrop-filter: blur(6px);
  border-radius: 10px; padding: 14px 18px;
  display: flex; flex-direction: column; line-height: 1.5;
}
.about-media-card b { color: var(--green-dark); font-size: 15px; }
.about-media-card span { font-size: 12px; color: var(--ink-light); letter-spacing: 1px; }

/* ===== 业务领域 ===== */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.biz-card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: transform .3s, box-shadow .3s;
}
.biz-card:hover { transform: translateY(-6px); box-shadow: 0 16px 36px rgba(31,107,59,.14); }
.biz-img { aspect-ratio: 4/3; overflow: hidden; }
.biz-img img { transition: transform .5s ease; }
.biz-card:hover .biz-img img { transform: scale(1.06); }
.biz-body { padding: 22px 24px 26px; border-top: 3px solid var(--green); }
.biz-body h3 { font-size: 18px; color: var(--green-dark); margin-bottom: 10px; letter-spacing: 1px; }
.biz-body p { font-size: 14px; color: var(--ink-light); }

/* ===== 核心优势 ===== */
.strength { background: var(--white); }
.strength-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.strength-item {
  background: var(--bg); border: 1px solid #E3EDE5; border-radius: var(--radius);
  padding: 32px 24px; text-align: center; transition: transform .3s, border-color .3s;
}
.strength-item:hover { transform: translateY(-5px); border-color: var(--green); }
.strength-icon {
  width: 64px; height: 64px; margin: 0 auto 18px;
  background: var(--green-light); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.strength-item h3 { font-size: 17px; color: var(--ink); margin-bottom: 10px; letter-spacing: 1px; }
.strength-item p { font-size: 13.5px; color: var(--ink-light); }

/* ===== 新闻动态 ===== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: transform .3s;
}
.news-card:hover { transform: translateY(-6px); }
.news-img { aspect-ratio: 16/10; overflow: hidden; }
.news-body { padding: 20px 24px 26px; }
.news-body time { font-size: 12px; color: var(--green); letter-spacing: 1px; }
.news-body h3 { font-size: 16.5px; color: var(--ink); margin: 8px 0 10px; line-height: 1.55; }
.news-body p { font-size: 13.5px; color: var(--ink-light); }

/* ===== 联系我们 ===== */
.contact { background: linear-gradient(180deg, var(--white) 0%, var(--green-light) 100%); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-info h3 { font-size: 20px; color: var(--green-dark); margin-bottom: 22px; letter-spacing: 1px; }
.contact-info ul { list-style: none; display: flex; flex-direction: column; gap: 16px; margin-bottom: 28px; }
.contact-info li { display: flex; gap: 12px; align-items: flex-start; font-size: 14.5px; color: var(--ink-light); }
.contact-info li svg { flex: none; margin-top: 3px; }
.contact-banner {
  position: relative; height: 160px; border-radius: var(--radius);
  background-size: cover; background-position: center; overflow: hidden;
  display: flex; align-items: flex-end;
}
.contact-banner::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(16,54,32,.65) 100%);
}
.contact-banner span {
  position: relative; z-index: 2; color: var(--white);
  font-size: 16px; letter-spacing: 4px; padding: 16px 20px;
}
.contact-form {
  background: var(--white); border-radius: var(--radius);
  padding: 36px 34px; box-shadow: var(--shadow);
}
.form-row { margin-bottom: 20px; }
.form-row label { display: block; font-size: 14px; color: var(--ink); margin-bottom: 8px; }
.form-row label i { color: #C0392B; font-style: normal; }
.form-row input, .form-row textarea {
  width: 100%; border: 1px solid #D8E4DA; border-radius: 8px;
  padding: 12px 14px; font-size: 14px; font-family: inherit; color: var(--ink);
  background: #FBFDFB; transition: border-color .25s, box-shadow .25s; resize: vertical;
}
.form-row input:focus, .form-row textarea:focus {
  outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(62,155,95,.15);
}
.form-row.invalid input, .form-row.invalid textarea { border-color: #C0392B; }
.form-err { display: block; min-height: 18px; font-size: 12px; color: #C0392B; font-style: normal; margin-top: 4px; }
.form-tip { margin-top: 14px; text-align: center; font-size: 14px; color: var(--green-dark); }

/* ===== 页脚 ===== */
.site-footer { background: #173A26; color: rgba(255,255,255,.8); padding: 44px 0 28px; }
.footer-inner { display: flex; flex-direction: column; gap: 14px; }
.footer-brand { display: flex; flex-direction: column; gap: 8px; }
.footer-logo {
  width: 52px; height: 52px; object-fit: contain;
  background: var(--white); border-radius: 12px; padding: 5px;
}
.footer-brand b { font-size: 17px; color: var(--white); letter-spacing: 2px; }
.footer-brand p { font-size: 13px; color: rgba(255,255,255,.6); letter-spacing: 2px; margin-top: 6px; }
.footer-meta { border-top: 1px solid rgba(255,255,255,.12); padding-top: 18px; }
.footer-meta p { font-size: 12.5px; color: rgba(255,255,255,.55); }

/* ===== 滚动淡入 ===== */
.fade-up { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.fade-up.visible { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .biz-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .strength-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 42px; }
}

@media (max-width: 768px) {
  :root { --header-h: 62px; }
  .section { padding: 64px 0; }
  .section-title { font-size: 25px; }
  .logo-img { width: 36px; height: 36px; }
  .logo-text strong { font-size: 14px; }
  .logo-text em { display: none; }

  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--white); padding: 12px 20px 20px;
    box-shadow: 0 16px 24px rgba(31,107,59,.12);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .25s, transform .25s;
  }
  .main-nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-link { padding: 12px 14px; font-size: 15px; }
  .nav-cta { margin: 8px 0 0; text-align: center; }

  .hero { min-height: 520px; }
  .hero h1 { font-size: 32px; letter-spacing: 2px; }
  .hero-sub { font-size: 14.5px; }
  .hero-tag { font-size: 12px; letter-spacing: 2px; }

  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .about-facts { grid-template-columns: repeat(2, 1fr); }
  .biz-grid, .news-grid, .strength-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 26px 22px; }
}