/* ============================================
   穗宜康科技 - 公司官网样式
   配色: Teal Trust (#028090 / #00A896)
   ============================================ */

:root {
  --pri: #028090; --pri-dark: #015F6B; --sec: #00A896; --accent: #02C39A;
  --dark: #1A2F3B; --tx: #1E293B; --mu: #64748B; --lt: #F0F9FA;
  --bg: #FFFFFF; --card: #F8FAFC; --border: #E2E8F0;
  --shadow: 0 2px 12px rgba(0,0,0,.08);
  --max-w: 1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;
  color: var(--tx); background: var(--bg); line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Navigation ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.96); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s;
}
.navbar.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,.08); }
.nav-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 64px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-logo img { height: 36px; width: auto; }
.nav-logo span { font-size: 1.25rem; font-weight: 700; color: var(--pri); }
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a {
  text-decoration: none; color: var(--mu); font-size: .9rem; font-weight: 500;
  transition: color .2s; padding: 4px 0; position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--pri); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -2px; left: 0; right: 0; height: 2px;
  background: var(--pri); transform: scaleX(0); transition: transform .25s;
}
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--pri); margin: 5px 0; transition: .3s; border-radius: 2px; }
@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg); flex-direction: column; gap: 0; padding: 16px 24px;
    box-shadow: 0 8px 24px rgba(0,0,0,.1); border-top: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; font-size: 1rem; border-bottom: 1px solid var(--border); }
  .nav-toggle { display: block; }
}

/* ── Sections ── */
section { padding: 100px 24px; }
.section-inner { max-width: var(--max-w); margin: 0 auto; }
.section-title {
  text-align: center; font-size: 2rem; font-weight: 700; color: var(--dark);
  margin-bottom: 16px;
}
.section-subtitle {
  text-align: center; color: var(--mu); font-size: 1.05rem; margin-bottom: 60px; max-width: 640px; margin-left: auto; margin-right: auto;
}

/* ── Hero ── */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  text-align: center; padding-top: 64px;
  background: linear-gradient(135deg, var(--lt) 0%, var(--bg) 50%, #E0F7F5 100%);
}
.hero-content { max-width: 720px; }
.hero h1 { font-size: 2.8rem; font-weight: 800; color: var(--dark); line-height: 1.3; margin-bottom: 20px; }
.hero h1 span { color: var(--pri); }
.hero p { font-size: 1.15rem; color: var(--mu); margin-bottom: 36px; }
.hero .btn {
  display: inline-block; padding: 14px 40px; background: var(--pri); color: #fff;
  border-radius: 8px; text-decoration: none; font-size: 1rem; font-weight: 600;
  transition: background .25s, transform .2s; box-shadow: 0 4px 14px rgba(2,128,144,.3);
}
.hero .btn:hover { background: var(--pri-dark); transform: translateY(-2px); }

/* ── About ── */
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 48px; }
@media (max-width: 768px) { .about-grid { grid-template-columns: 1fr; } }
.about-card {
  background: var(--card); border-radius: 12px; padding: 32px 24px; text-align: center;
  transition: transform .25s, box-shadow .25s; border: 1px solid var(--border);
}
.about-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.about-card .icon { font-size: 2.5rem; margin-bottom: 16px; }
.about-card h3 { font-size: 1.1rem; color: var(--pri); margin-bottom: 12px; }
.about-card p { color: var(--mu); font-size: .95rem; line-height: 1.6; }

/* ── Products ── */
.products { background: var(--lt); }
.product-card {
  background: var(--bg); border-radius: 16px; padding: 40px; margin-bottom: 32px;
  border: 1px solid var(--border); box-shadow: 0 1px 4px rgba(0,0,0,.04);
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start;
}
@media (max-width: 768px) { .product-card { grid-template-columns: 1fr; padding: 28px; } }
.product-card .tag {
  display: inline-block; padding: 4px 12px; background: #E0F7F5; color: var(--pri);
  border-radius: 20px; font-size: .8rem; font-weight: 600; margin-bottom: 12px;
}
.product-card h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 16px; color: var(--dark); }
.product-card .desc { color: var(--mu); line-height: 1.7; margin-bottom: 24px; }
.product-features { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 480px) { .product-features { grid-template-columns: 1fr; } }
.product-features li {
  display: flex; align-items: center; gap: 8px; font-size: .92rem; color: var(--tx);
}
.product-features li::before { content: "✓"; color: var(--sec); font-weight: 700; }
.product-card .btn-outline {
  display: inline-block; margin-top: 24px; padding: 10px 28px; border: 2px solid var(--pri);
  color: var(--pri); border-radius: 8px; text-decoration: none; font-weight: 600;
  transition: all .2s; font-size: .9rem;
}
.product-card .btn-outline:hover { background: var(--pri); color: #fff; }

/* ── Advantages ── */
.advantages-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
@media (max-width: 768px) { .advantages-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .advantages-grid { grid-template-columns: 1fr; } }
.adv-card {
  background: var(--card); border-radius: 12px; padding: 28px 24px;
  border: 1px solid var(--border); text-align: center; transition: transform .2s;
}
.adv-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.adv-card .icon { font-size: 2.2rem; margin-bottom: 14px; }
.adv-card h3 { font-size: 1.05rem; color: var(--pri); margin-bottom: 8px; }
.adv-card p { color: var(--mu); font-size: .88rem; line-height: 1.5; }

/* ── Cases ── */
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
@media (max-width: 768px) { .cases-grid { grid-template-columns: 1fr; } }
.case-card { background: var(--card); border-radius: 12px; padding: 32px; border: 1px solid var(--border); }
.case-card .status {
  display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: .78rem;
  font-weight: 600; margin-bottom: 16px;
}
.case-card .status.active { background: #D1FAE5; color: #059669; }
.case-card .status.soon { background: #FEF3C7; color: #D97706; }
.case-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.case-card .project { color: var(--pri); font-size: .9rem; font-weight: 500; margin-bottom: 12px; }
.case-card .desc { color: var(--mu); font-size: .92rem; line-height: 1.6; }

/* ── Contact ── */
.contact { background: var(--lt); }
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
  max-width: 800px; margin: 0 auto;
}
@media (max-width: 600px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-info .item { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; font-size: 1rem; color: var(--tx); }
.contact-info .item .icon { font-size: 1.3rem; min-width: 28px; text-align: center; }
.contact-info .item a { color: var(--pri); text-decoration: none; }
.contact-info .item a:hover { text-decoration: underline; }
.contact-qr { text-align: center; }
.contact-qr img { width: 160px; height: 160px; border-radius: 12px; margin-bottom: 12px; }
.contact-qr p { color: var(--mu); font-size: .85rem; }

/* ── Footer ── */
footer {
  background: var(--dark); color: rgba(255,255,255,.7); padding: 48px 24px 32px;
  text-align: center; font-size: .88rem;
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; }
footer a { color: rgba(255,255,255,.85); text-decoration: none; transition: color .2s; }
footer a:hover { color: var(--sec); }
.footer-links { display: flex; justify-content: center; gap: 28px; margin-bottom: 24px; flex-wrap: wrap; }
.footer-links a { font-weight: 500; }
.footer-brand { font-size: 1.1rem; font-weight: 700; color: var(--sec); margin-bottom: 8px; }
.footer-copy { color: rgba(255,255,255,.45); }

/* ── Scroll to top ── */
.btn-top {
  position: fixed; bottom: 32px; right: 32px; width: 44px; height: 44px;
  background: var(--pri); color: #fff; border: none; border-radius: 50%;
  cursor: pointer; font-size: 1.2rem; box-shadow: 0 4px 12px rgba(2,128,144,.35);
  opacity: 0; transform: translateY(20px); transition: all .3s; z-index: 999;
}
.btn-top.visible { opacity: 1; transform: translateY(0); }
.btn-top:hover { background: var(--pri-dark); }