/* ===== 贵州时雨气象科技有限公司 官网样式 =====
   设计风格：简约高端 · 白底大留白 · 现代排版 */

:root {
  --color-bg: #FFFFFF;
  --color-bg-soft: #F7F8FA;
  --color-ink: #111827;
  --color-ink-soft: #4B5563;
  --color-muted: #6B7280;
  --color-line: #E5E7EB;
  --color-brand: #0B2545;
  --color-accent: #2563EB;
  --color-accent-soft: #EFF4FF;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --maxw: 1140px;
  --radius: 14px;
  --radius-sm: 8px;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--color-brand);
}
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--color-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex: 0 0 auto;
}
.brand-mark svg { width: 20px; height: 20px; }
.brand small {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--color-muted);
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.nav-links { display: flex; align-items: center; gap: var(--space-4); }
.nav-links a {
  font-size: 15px;
  color: var(--color-ink-soft);
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--color-accent); }
.nav-links a.active { color: var(--color-accent); font-weight: 600; }
.nav-cta {
  display: inline-block;
  padding: 10px 20px;
  background: var(--color-brand);
  color: #fff;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease;
}
.nav-cta:hover { background: var(--color-accent); transform: translateY(-1px); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  width: 40px;
  height: 40px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span { width: 18px; height: 2px; background: var(--color-ink); border-radius: 2px; }

/* ===== 通用区块 ===== */
.section { padding: var(--space-6) 0; }
.section-soft { background: var(--color-bg-soft); }

.section-head { max-width: 680px; margin-bottom: var(--space-5); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}
.section-head h2 {
  font-size: 34px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-brand);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
}
.section-head p { font-size: 17px; color: var(--color-muted); }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}
.btn-primary { background: var(--color-brand); color: #fff; }
.btn-primary:hover { background: var(--color-accent); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--color-brand); border-color: var(--color-line); }
.btn-ghost:hover { border-color: var(--color-brand); }

/* ===== 首页 Hero ===== */
.hero {
  position: relative;
  padding: var(--space-6) 0;
  background: linear-gradient(180deg, #FBFCFE 0%, #FFFFFF 100%);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-5);
  align-items: center;
}
.hero h1 {
  font-size: 52px;
  line-height: 1.15;
  font-weight: 700;
  color: var(--color-brand);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}
.hero h1 .grad {
  background: linear-gradient(90deg, var(--color-accent), #38BDF8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .lead {
  font-size: 19px;
  color: var(--color-ink-soft);
  max-width: 560px;
  margin-bottom: var(--space-4);
}
.hero-actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: var(--space-5);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}
.hero-stats .stat b { font-size: 30px; font-weight: 700; color: var(--color-brand); display: block; }
.hero-stats .stat span { font-size: 14px; color: var(--color-muted); }

.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 24px;
  background: radial-gradient(circle at 30% 20%, #2563EB22, transparent 55%),
    radial-gradient(circle at 70% 80%, #38BDF822, transparent 55%), var(--color-bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual svg { width: 72%; height: 72%; }

/* ===== 卡片 ===== */
.cards { display: grid; gap: var(--space-3); }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px -20px rgba(11, 37, 69, 0.25);
  border-color: transparent;
}
.card-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
}
.card-icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 19px; font-weight: 700; color: var(--color-brand); margin-bottom: var(--space-2); }
.card p { font-size: 15px; color: var(--color-muted); }
.card .tag {
  display: inline-block;
  font-size: 12px;
  color: var(--color-accent);
  font-weight: 600;
  margin-top: var(--space-3);
}

/* ===== 页面头（子页） ===== */
.page-hero {
  background: var(--color-brand);
  color: #fff;
  padding: var(--space-6) 0 var(--space-5);
}
.page-hero .eyebrow { color: #7CB3FF; }
.page-hero h1 {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}
.page-hero p { font-size: 18px; color: rgba(255, 255, 255, 0.78); max-width: 640px; }

/* ===== 列表/详情 ===== */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); align-items: start; }
.split + .split { margin-top: var(--space-6); }

.checklist li {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 16px;
}
.checklist li::before {
  content: "";
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--color-accent-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%232563EB' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/12px no-repeat;
}

/* ===== 案例 ===== */
.case {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
  transition: box-shadow 0.25s ease;
}
.case:hover { box-shadow: 0 16px 40px -20px rgba(11, 37, 69, 0.2); }
.case + .case { margin-top: var(--space-3); }
.case-cat {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.06em;
}
.case h3 { font-size: 20px; font-weight: 700; color: var(--color-brand); margin-bottom: var(--space-2); }
.case p { font-size: 15px; color: var(--color-muted); }
.case .meta { margin-top: var(--space-3); font-size: 13px; color: var(--color-muted); }

/* ===== 关于 ===== */
.about-block { margin-bottom: var(--space-5); }
.about-block h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: var(--space-2);
}
.about-block p { font-size: 16px; color: var(--color-ink-soft); margin-bottom: var(--space-2); }
.quote {
  border-left: 3px solid var(--color-accent);
  padding: var(--space-2) var(--space-3);
  background: var(--color-bg-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 16px;
  color: var(--color-ink-soft);
  margin: var(--space-3) 0;
}

/* ===== 联系 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.contact-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}
.contact-item .card-icon { margin-bottom: 0; }
.contact-item h3 { font-size: 16px; font-weight: 700; color: var(--color-brand); margin-bottom: 4px; }
.contact-item p { font-size: 15px; color: var(--color-muted); }
.contact-item a { color: var(--color-accent); }

/* ===== CTA 区块 ===== */
.cta {
  background: var(--color-brand);
  color: #fff;
  border-radius: 24px;
  padding: var(--space-5);
  text-align: center;
}
.cta h2 { font-size: 32px; font-weight: 700; margin-bottom: var(--space-2); }
.cta p { font-size: 17px; color: rgba(255, 255, 255, 0.78); margin-bottom: var(--space-4); }
.cta .btn-primary { background: #fff; color: var(--color-brand); }
.cta .btn-primary:hover { background: var(--color-accent); color: #fff; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-brand);
  color: rgba(255, 255, 255, 0.72);
  padding: var(--space-5) 0 var(--space-3);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}
.footer-brand { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: var(--space-2); }
.footer-grid p { font-size: 14px; }
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-2);
  letter-spacing: 0.04em;
}
.footer-col a {
  display: block;
  font-size: 14px;
  padding: 5px 0;
  transition: color 0.2s ease;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  padding-top: var(--space-3);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .hero-grid, .split, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .cards-3, .cards-4 { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 38px; }
  .page-hero h1 { font-size: 34px; }
  .section-head h2 { font-size: 28px; }
  .hero-visual { display: none; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-line);
    padding: var(--space-3);
    gap: var(--space-3);
    align-items: flex-start;
  }
  .nav-toggle { display: flex; }
  .cards-3, .cards-4 { grid-template-columns: 1fr; }
  .case { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .section { padding: var(--space-5) 0; }
  .hero-stats { gap: var(--space-3); flex-wrap: wrap; }
}