/* ==========================================================================
   雄安睿天科技有限公司官方网站 - 高端企业级水务科技设计系统 (精简专业版)
   Corporate Smart Water Website Stylesheet (Refined, Concise & Professional)
   ========================================================================== */

:root {
  --primary: #0284C7;
  --primary-hover: #0369A1;
  --primary-light: #F0F9FF;
  --primary-subtle: #E0F2FE;
  --primary-gradient: linear-gradient(135deg, #0284C7 0%, #0EA5E9 60%, #06B6D4 100%);
  
  --secondary: #0EA5E9;
  --accent-cyan: #06B6D4;
  --accent-teal: #0D9488;
  --success: #10B981;
  --gold: #D97706;

  --bg-page: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-alt: #F1F5F9;
  --border-light: #E2E8F0;
  --border-card: rgba(226, 232, 240, 0.9);

  --text-title: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-light: #94A3B8;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06);
  --shadow-card: 0 6px 20px -3px rgba(2, 132, 199, 0.08);

  --container-max: 1160px;
  --transition: all 0.2s ease-in-out;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-body);
  line-height: 1.6;
  font-size: 15px;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.text-center { text-align: center; }
.text-primary { color: var(--primary) !important; }
.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.font-mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }
.font-bold { font-weight: 700; }

/* ==================== 顶部导航栏 ==================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  display: flex;
  align-items: center;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.company-name {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: -0.3px;
  line-height: 1.15;
}

.company-sub {
  font-size: 9.5px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-body);
}

.nav-links a:hover {
  color: var(--primary);
}

.domain-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-subtle);
  border: 1px solid #BAE6FD;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.dot-online {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
}

.domain-text {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  font-family: ui-monospace, SFMono-Regular, monospace;
}

/* ==================== 首屏 Hero Section ==================== */
.hero-section {
  padding: 48px 0 56px;
  background: radial-gradient(circle at 85% 15%, rgba(224, 242, 254, 0.65) 0%, rgba(248, 250, 252, 0.95) 75%);
  border-bottom: 1px solid var(--border-light);
}

.hero-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
}

.tag-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tag-pill {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.2);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.tag-pill.accent {
  color: #B45309;
  background: #FEF3C7;
  border-color: #FDE68A;
}

.hero-title {
  font-size: 36px;
  font-weight: 900;
  color: var(--text-title);
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

.hero-lead {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* 首屏指标卡片 */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
}

.metric-card {
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.metric-val .unit {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-left: 2px;
}

.metric-lbl {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* 首屏右侧大图 */
.img-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.img-card:hover {
  transform: translateY(-3px);
}

.hero-img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.img-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: #FFFFFF;
  border-top: 1px solid var(--border-light);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-title);
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.25);
}

/* ==================== 区域通用规范 ==================== */
.section {
  padding: 60px 0;
}

.bg-light {
  background-color: var(--bg-alt);
}

.section-header {
  max-width: 680px;
  margin: 0 auto 36px auto;
}

.section-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--primary);
  background: var(--primary-subtle);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 8px;
}

.section-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

.section-subtitle {
  font-size: 14px;
  color: var(--text-muted);
}

/* ==================== 解决方案图文卡片 (2x2 Grid) ==================== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.solution-card {
  background: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.solution-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-card);
}

.card-thumb {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: #E2E8F0;
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.solution-card:hover .card-thumb img {
  transform: scale(1.03);
}

.thumb-tag {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(4px);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}

.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-body h3 {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 6px;
}

.card-body .desc {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 14px;
}

.tag-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
}

.chip {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-body);
  background: #F1F5F9;
  border: 1px solid #E2E8F0;
  padding: 3px 8px;
  border-radius: 4px;
}

/* ==================== 技术优势卡片 (4 Columns) ==================== */
.tech-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.tech-item {
  background: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.tech-item:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.tech-badge {
  font-size: 18px;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.3;
  font-family: ui-monospace, SFMono-Regular, monospace;
  margin-bottom: 6px;
}

.tech-item h4 {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 8px;
}

.tech-item p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* ==================== 荣誉成果照片墙 (4 Columns) ==================== */
.honors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.honor-card {
  background: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.honor-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.honor-img-box {
  position: relative;
  width: 100%;
  height: 170px;
  overflow: hidden;
  background: #E2E8F0;
}

.honor-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.honor-card:hover .honor-img-box img {
  transform: scale(1.03);
}

.honor-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}

.honor-badge.gold {
  color: #B45309;
  background: #FEF3C7;
  border: 1px solid #FDE68A;
}

.honor-badge.blue {
  color: #0369A1;
  background: #E0F2FE;
  border: 1px solid #BAE6FD;
}

.honor-desc {
  padding: 14px;
}

.honor-desc h4 {
  font-size: 14px;
  font-weight: 800;
  color: var(--text-title);
  line-height: 1.35;
  margin-bottom: 4px;
}

.honor-desc p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==================== 关于我们卡片 ==================== */
.about-panel {
  background: #FFFFFF;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.about-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 12px;
}

.about-intro {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.about-intro strong {
  color: var(--primary);
}

.about-right {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.meta-card {
  background: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
}

.meta-label {
  font-size: 11px;
  color: var(--text-light);
  font-weight: 600;
}

.meta-val {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-title);
  margin-top: 2px;
}

/* ==========================================================================
   工信部备案页脚 (纯净·专业·居中展示)
   ========================================================================== */
.site-footer {
  background: #FFFFFF;
  border-top: 1px solid var(--border-light);
  padding: 32px 0 24px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
}

.footer-brand-line {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-corp {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-title);
}

.footer-sub {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.5px;
}

.icp-filing-wrap {
  margin: 4px 0;
}

.icp-filing-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 4px;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  border: 1px solid #BAE6FD;
  transition: var(--transition);
}

.icp-filing-link:hover {
  background: var(--primary-subtle);
  color: var(--primary-hover);
}

.copyright-line {
  font-size: 12px;
  color: var(--text-light);
}

/* ==================== 响应式适配 ==================== */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .hero-img {
    height: 260px;
  }
  .tech-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .honors-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-panel {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: auto;
    padding: 12px 0;
    flex-direction: column;
    gap: 8px;
  }
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }
  .hero-title {
    font-size: 26px;
  }
  .metrics-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
  .solutions-grid {
    grid-template-columns: 1fr;
  }
  .tech-cards-grid {
    grid-template-columns: 1fr;
  }
  .honors-grid {
    grid-template-columns: 1fr;
  }
  .about-right {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 40px 0;
  }
  .section-title {
    font-size: 21px;
  }
}