/* ============================================
   祥泰健康 - 企业官网样式
   ============================================ */

/* ---------- Reset & Variables ---------- */
:root {
  --color-primary: #2e7d32;
  --color-primary-dark: #1b5e20;
  --color-primary-light: #e8f5e9;
  --color-text: #263238;
  --color-text-light: #546e7a;
  --color-bg: #fafbfc;
  --color-bg-alt: #f1f5f2;
  --color-white: #ffffff;
  --color-border: #e0e0e0;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,.08);
  --radius: 8px;
  --max-width: 1080px;
  --header-height: 64px;
}

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

html { scroll-behavior:smooth; }

body {
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration:none; color:inherit; }
img { max-width:100%; display:block; }
ul { list-style:none; }

.container { max-width: var(--max-width); margin:0 auto; padding:0 20px; }

/* ---------- Header ---------- */
.header {
  position: fixed; top:0; left:0; right:0; z-index:1000;
  height: var(--header-height);
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,.06);
  transition: box-shadow .3s;
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header-inner {
  display:flex; align-items:center; justify-content:space-between;
  height: 100%;
}

.logo { font-size:17px; font-weight:700; color:var(--color-primary); }

.nav { display:flex; gap:4px; }
.nav-link {
  padding:8px 16px; border-radius:4px;
  font-size:15px; color:var(--color-text-light);
  transition: all .25s;
}
.nav-link:hover, .nav-link.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.menu-toggle {
  display:none;
  background:none; border:none; font-size:24px; cursor:pointer;
  color:var(--color-text); padding:4px;
}

@media (max-width:768px) {
  .nav { display:none; position:absolute; top:var(--header-height); left:0; right:0; flex-direction:column; background:#fff; padding:12px; border-bottom:1px solid var(--color-border); box-shadow:var(--shadow-md); }
  .nav.open { display:flex; }
  .nav-link { border-radius:4px; padding:12px 16px; }
  .menu-toggle { display:block; }
}

/* ---------- Hero ---------- */
.hero {
  min-height:480px;
  display:flex; align-items:center; justify-content:center; text-align:center;
  background: linear-gradient(135deg, #1b5e20 0%, #2e7d32 50%, #388e3c 100%);
  color: #fff;
  padding-top: var(--header-height);
}

.hero-content { max-width:720px; }
.hero-title { font-size:40px; font-weight:700; letter-spacing:3px; margin-bottom:16px; }
.hero-subtitle { font-size:16px; opacity:.85; line-height:1.8; }

@media (max-width:768px) {
  .hero { min-height:380px; }
  .hero-title { font-size:28px; }
  .hero-subtitle { font-size:14px; }
}

/* ---------- Section ---------- */
.section { padding:72px 0; }
.section-alt { background: var(--color-bg-alt); }

.section-header { text-align:center; margin-bottom:48px; }
.section-title { font-size:28px; font-weight:700; color:var(--color-text); position:relative; }
.section-title::after {
  content:''; display:block;
  width:40px; height:3px; background:var(--color-primary);
  margin:12px auto 0; border-radius:2px;
}

@media (max-width:768px) {
  .section { padding:48px 0; }
  .section-title { font-size:24px; }
}

/* ---------- About ---------- */
.about-text { max-width:780px; margin:0 auto 40px; }
.about-text p {
  font-size:15px; color:var(--color-text-light); line-height:2;
  text-indent: 2em; margin-bottom:8px;
}

.about-grid {
  display:grid; grid-template-columns:repeat(4,1fr); gap:20px;
}
.about-card {
  background: #fff; border-radius: var(--radius);
  padding:28px 20px; text-align:center;
  box-shadow: var(--shadow-sm);
}
.about-card h3 { font-size:16px; margin-bottom:8px; color:var(--color-primary); }
.about-card p { font-size:14px; color:var(--color-text-light); line-height:1.7; }

@media (max-width:768px) { .about-grid { grid-template-columns:repeat(2,1fr); } }
@media (max-width:480px) { .about-grid { grid-template-columns:1fr; } }

/* ---------- Services ---------- */
.services-grid {
  display:grid; grid-template-columns:repeat(3,1fr); gap:24px;
}
.service-card {
  background: #fff; border-radius: var(--radius);
  padding:32px 24px;
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--color-primary);
}
.service-card h3 { font-size:17px; margin-bottom:8px; }
.service-card p { font-size:14px; color:var(--color-text-light); line-height:1.7; }

@media (max-width:768px) { .services-grid { grid-template-columns:repeat(2,1fr); } }
@media (max-width:480px) { .services-grid { grid-template-columns:1fr; } }

/* ---------- Footer ---------- */
.footer {
  background: #1b5e20; color:rgba(255,255,255,.75);
  padding:40px 0 28px;
  font-size:14px;
}
.footer-inner {
  display:flex; justify-content:space-between; align-items:flex-start;
  gap:40px;
}
.footer-info strong { font-size:16px; color:#fff; display:block; margin-bottom:8px; }
.footer-info p { line-height:1.8; }
.footer-icp { font-size:12px; opacity:.5; margin-top:12px; }
.footer-icp a { color:inherit; }
.footer-links { display:flex; gap:24px; }
.footer-links a { opacity:.7; transition:opacity .2s; }
.footer-links a:hover { opacity:1; }

@media (max-width:768px) {
  .footer-inner { flex-direction:column; gap:24px; }
}