/* ============================================================
   深圳市海扬粉体科技有限公司 - 全局样式
   作者：WorkBuddy
   说明：工业科技风，蓝白配色，响应式布局
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --primary: #0072bc;       /* 主蓝色 */
  --primary-dark: #005a96;  /* 深蓝色 */
  --primary-light: #3399d6; /* 浅蓝色 */
  --accent: #ff6b00;        /* 橙色强调 */
  --bg-white: #ffffff;
  --bg-light: #f4f7fc;
  --bg-dark: #0c1f3f;
  --text-dark: #1a2340;
  --text-mid: #4a5568;
  --text-light: #718096;
  --border: #dde3ef;
  --shadow: 0 4px 20px rgba(0, 114, 188, 0.10);
  --shadow-lg: 0 8px 40px rgba(0, 114, 188, 0.18);
  --radius: 6px;
  --radius-lg: 12px;
  --transition: 0.3s ease;
  --font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --container: 1200px;
}

/* ---------- 重置与基础 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--text-dark);
  background: var(--bg-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }

/* ---------- 布局容器 ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 80px 0; }
.section-alt { background: var(--bg-light); }
.section-dark { background: var(--bg-dark); color: #fff; }

/* ---------- 标题通用 ---------- */
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block;
  padding: 4px 16px;
  background: rgba(0,114,188,0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  border-radius: 20px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-dark .section-tag {
  background: rgba(255,255,255,0.12);
  color: #9ecfff;
}
.section-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-dark .section-title { color: #fff; }
.section-subtitle {
  font-size: 16px;
  color: var(--text-light);
  max-width: 640px;
  margin: 0 auto;
}
.section-dark .section-subtitle { color: rgba(255,255,255,0.65); }
.title-line {
  width: 60px; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 2px;
  margin: 20px auto 0;
}

/* ============================================================
   顶部通知栏
   ============================================================ */
.topbar {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  padding: 7px 0;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.topbar-slogan { font-style: italic; letter-spacing: 1px; }
.topbar-contact { display: flex; gap: 20px; }
.topbar-contact span { display: flex; align-items: center; gap: 5px; }
.topbar-contact .icon { width: 14px; height: 14px; }

/* ============================================================
   头部 Header
   ============================================================ */
#header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-white);
  box-shadow: 0 2px 12px rgba(0,114,188,0.08);
  transition: box-shadow var(--transition);
}
#header.scrolled { box-shadow: 0 4px 24px rgba(0,114,188,0.16); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
/* Logo */
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-img { height: 50px; width: auto; display: block; }
/* 导航 */
.nav { display: flex; align-items: center; gap: 4px; }
.nav-item {
  position: relative;
}
.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-dark);
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: rgba(0,114,188,0.06);
}
/* 头部电话 */
.header-phone {
  display: flex; align-items: center; gap: 10px;
  background: var(--primary);
  color: #fff;
  padding: 10px 20px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
  transition: background var(--transition), box-shadow var(--transition);
}
.header-phone:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(0,114,188,0.35);
  color: #fff;
}
.header-phone svg { flex-shrink: 0; }
/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   Banner / Hero
   ============================================================ */
#banner {
  position: relative;
  min-height: 580px;
  background: linear-gradient(135deg, #0c1f3f 0%, #0072bc 55%, #3399d6 100%);
  display: flex; align-items: center;
  overflow: hidden;
}
.banner-bg-pattern {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.04) 0%, transparent 60%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 50%),
    linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.02) 25%, transparent 25%);
  background-size: auto, auto, 40px 40px, 40px 40px;
}
/* 几何装饰线 */
.banner-deco {
  position: absolute; right: 0; top: 0; bottom: 0;
  width: 50%;
  overflow: hidden;
  pointer-events: none;
}
.banner-deco::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 50%;
  top: 50%; right: -200px;
  transform: translateY(-50%);
}
.banner-deco::after {
  content: '';
  position: absolute;
  width: 400px; height: 400px;
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 50%;
  top: 50%; right: -50px;
  transform: translateY(-50%);
}
.banner-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
}
.banner-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px; color: rgba(255,255,255,0.9);
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}
.banner-badge-dot {
  width: 7px; height: 7px;
  background: #4ade80;
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}
.banner-title {
  font-size: clamp(32px, 4.5vw, 54px);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.banner-title span { color: #7dd3fc; }
.banner-slogan {
  font-size: clamp(15px, 1.8vw, 18px);
  color: rgba(255,255,255,0.8);
  margin-bottom: 12px;
  font-style: italic;
  letter-spacing: 1px;
}
.banner-desc {
  font-size: 15px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 36px;
  line-height: 1.8;
}
.banner-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff;
  color: var(--primary);
  padding: 13px 28px;
  border-radius: 30px;
  font-size: 15px; font-weight: 700;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.btn-primary:hover {
  background: #f0f7ff;
  box-shadow: 0 6px 24px rgba(0,0,0,0.2);
  transform: translateY(-2px);
  color: var(--primary-dark);
}
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  border: 2px solid rgba(255,255,255,0.6);
  color: #fff;
  padding: 13px 28px;
  border-radius: 30px;
  font-size: 15px; font-weight: 600;
  transition: all var(--transition);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
  color: #fff;
}
/* Banner 数字统计 */
.banner-stats {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 48px;
}
.banner-stat-item {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(4px);
}
.banner-stat-num {
  font-size: 32px; font-weight: 800;
  color: #fff; line-height: 1;
  margin-bottom: 4px;
}
.banner-stat-num span { font-size: 18px; color: #7dd3fc; }
.banner-stat-label { font-size: 13px; color: rgba(255,255,255,0.7); }

/* ============================================================
   关于我们
   ============================================================ */
#about .about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-visual {
  position: relative;
}
.about-img-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #0c1f3f 0%, #0072bc 100%);
  display: flex; align-items: center; justify-content: center;
}
.about-img-wrap img {
  width: 100%; height: 100%; object-fit: cover;
}
.about-img-placeholder {
  text-align: center; color: rgba(255,255,255,0.6);
  padding: 40px;
}
.about-img-placeholder .big-icon { font-size: 80px; margin-bottom: 16px; }
.about-img-placeholder p { font-size: 15px; }
.about-badge-float {
  position: absolute;
  bottom: -20px; right: -20px;
  background: var(--accent);
  color: #fff;
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: 0 6px 24px rgba(255,107,0,0.35);
}
.about-badge-float .num { font-size: 30px; font-weight: 800; line-height: 1; }
.about-badge-float .label { font-size: 12px; opacity: 0.9; margin-top: 2px; }
.about-text { }
.about-lead {
  font-size: 18px; font-weight: 600;
  color: var(--primary);
  margin-bottom: 16px;
  line-height: 1.5;
}
.about-desc {
  font-size: 15px; color: var(--text-mid);
  margin-bottom: 24px; line-height: 1.9;
}
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.about-tag {
  padding: 7px 16px;
  background: rgba(0,114,188,0.06);
  border: 1px solid rgba(0,114,188,0.15);
  border-radius: 20px;
  font-size: 13px; font-weight: 600;
  color: var(--primary);
}
.about-values { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.value-item {
  display: flex; gap: 12px; align-items: flex-start;
}
.value-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: rgba(0,114,188,0.08);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}
.value-title { font-size: 14px; font-weight: 700; margin-bottom: 3px; }
.value-desc { font-size: 12px; color: var(--text-light); }

/* 发展历程 */
.timeline { position: relative; margin-top: 60px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 50%; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary) 0%, var(--border) 100%);
  transform: translateX(-50%);
}
.timeline-items {
  display: flex; flex-direction: column; gap: 40px;
}
.timeline-item {
  display: grid;
  grid-template-columns: 1fr 48px 1fr;
  gap: 0 20px;
  align-items: center;
}
.timeline-item:nth-child(odd) .timeline-content { grid-column: 1; text-align: right; }
.timeline-item:nth-child(odd) .timeline-dot { grid-column: 2; }
.timeline-item:nth-child(odd) .timeline-empty { grid-column: 3; }
.timeline-item:nth-child(even) .timeline-empty { grid-column: 1; }
.timeline-item:nth-child(even) .timeline-dot { grid-column: 2; }
.timeline-item:nth-child(even) .timeline-content { grid-column: 3; text-align: left; }
.timeline-dot {
  width: 48px; height: 48px;
  background: var(--primary);
  border: 4px solid #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: #fff;
  box-shadow: 0 0 0 4px rgba(0,114,188,0.15);
  position: relative; z-index: 1;
}
.timeline-content {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.timeline-year {
  font-size: 13px; font-weight: 700;
  color: var(--primary); margin-bottom: 6px;
  letter-spacing: 1px;
}
.timeline-event { font-size: 14px; color: var(--text-mid); line-height: 1.6; }

/* ============================================================
   企业实力（数据展示）
   ============================================================ */
#strength { background: linear-gradient(180deg, #0c1f3f 0%, #0d2d5c 100%); }
.strength-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}
.strength-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}
.strength-card:hover {
  background: rgba(255,255,255,0.10);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.strength-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  margin: 0 auto 16px;
}
.strength-num {
  font-size: 40px; font-weight: 800;
  color: #fff; line-height: 1;
  margin-bottom: 6px;
}
.strength-num .unit { font-size: 22px; color: #7dd3fc; }
.strength-label { font-size: 14px; color: rgba(255,255,255,0.7); }

/* 能力条 */
.capabilities { margin-top: 20px; }
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.cap-item {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex; gap: 16px; align-items: flex-start;
}
.cap-icon {
  width: 48px; height: 48px; flex-shrink: 0;
  background: rgba(0,114,188,0.5);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
}
.cap-title { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 6px; }
.cap-desc { font-size: 13px; color: rgba(255,255,255,0.6); line-height: 1.7; }

/* ============================================================
   研发技术
   ============================================================ */
#rd .rd-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}
.rd-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.rd-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
}
.rd-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.rd-card-icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, rgba(0,114,188,0.08), rgba(51,153,214,0.12));
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
}
.rd-card-num {
  position: absolute;
  top: 24px; right: 24px;
  font-size: 48px; font-weight: 900;
  color: rgba(0,114,188,0.05);
  line-height: 1;
  font-family: Georgia, serif;
}
.rd-card-title { font-size: 19px; font-weight: 700; margin-bottom: 12px; color: var(--text-dark); }
.rd-card-desc { font-size: 14px; color: var(--text-mid); line-height: 1.8; margin-bottom: 20px; }
.rd-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.rd-tag {
  padding: 4px 12px;
  background: var(--bg-light);
  border-radius: 20px;
  font-size: 12px; color: var(--text-mid);
}
/* 技术团队 */
.tech-team {
  margin-top: 60px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.tech-team-text h3 {
  font-size: 24px; font-weight: 700; color: #fff;
  margin-bottom: 12px;
}
.tech-team-text p { font-size: 15px; color: rgba(255,255,255,0.8); line-height: 1.8; }
.tech-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.tech-stat {
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.tech-stat-num { font-size: 30px; font-weight: 800; color: #fff; line-height: 1; }
.tech-stat-num sup { font-size: 16px; }
.tech-stat-label { font-size: 12px; color: rgba(255,255,255,0.7); margin-top: 4px; }

/* 专利列表 */
.patents {
  margin-top: 50px;
}
.patents-title {
  font-size: 20px; font-weight: 700;
  margin-bottom: 24px;
  display: flex; align-items: center; gap: 10px;
}
.patents-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.patents-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.patent-item {
  display: flex; gap: 12px; align-items: center;
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--border);
}
.patent-icon {
  width: 36px; height: 36px; flex-shrink: 0;
  background: var(--primary);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.patent-name { font-size: 13px; font-weight: 600; color: var(--text-dark); line-height: 1.4; }
.patent-type { font-size: 11px; color: var(--text-light); margin-top: 2px; }

/* ============================================================
   荣誉资质
   ============================================================ */
#honor.section-alt { }
.honor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.honor-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all var(--transition);
  text-align: center;
}
.honor-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.honor-img {
  aspect-ratio: 3/4;
  background: linear-gradient(135deg, var(--bg-light), #e8f0fe);
  display: flex; align-items: center; justify-content: center;
  font-size: 48px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.honor-card-title {
  padding: 14px 12px;
  font-size: 13px; font-weight: 600;
  color: var(--text-dark);
  line-height: 1.4;
}

/* ============================================================
   战略合作
   ============================================================ */
#partners { }
.partners-intro {
  text-align: center;
  font-size: 15px; color: var(--text-mid);
  margin-bottom: 48px; line-height: 1.8;
  max-width: 800px; margin-left: auto; margin-right: auto;
}
.partners-logos {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.partner-logo {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 16px;
  text-align: center;
  font-size: 18px; font-weight: 800;
  color: var(--text-mid);
  transition: all var(--transition);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; min-height: 90px;
}
.partner-logo:hover {
  background: var(--bg-white);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.partner-logo img { max-width: 100%; max-height: 44px; object-fit: contain; }
.partner-desc {
  text-align: center;
  background: linear-gradient(135deg, rgba(0,114,188,0.05), rgba(51,153,214,0.08));
  border: 1px solid rgba(0,114,188,0.12);
  border-radius: var(--radius-lg);
  padding: 24px;
  font-size: 14px; color: var(--text-mid);
}
.partner-desc strong { color: var(--primary); }

/* ============================================================
   服务承诺
   ============================================================ */
#services.section-alt { }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.service-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%; transform: translateX(-50%);
  width: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 2px 2px 0 0;
  transition: width var(--transition);
}
.service-card:hover::after { width: 80%; }
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.service-icon {
  font-size: 42px; margin-bottom: 18px;
}
.service-title { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.service-desc { font-size: 14px; color: var(--text-mid); line-height: 1.8; }

/* ============================================================
   联系我们
   ============================================================ */
#contact { }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.contact-info { }
.contact-info h3 {
  font-size: 24px; font-weight: 700;
  margin-bottom: 24px;
}
.contact-items { display: flex; flex-direction: column; gap: 20px; }
.contact-item {
  display: flex; gap: 16px; align-items: flex-start;
}
.contact-item-icon {
  width: 48px; height: 48px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; color: #fff;
}
.contact-item-title { font-size: 13px; color: var(--text-light); margin-bottom: 3px; }
.contact-item-value { font-size: 16px; font-weight: 700; color: var(--text-dark); }
.contact-item-sub { font-size: 13px; color: var(--text-mid); margin-top: 2px; }
.contact-cta {
  margin-top: 32px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  color: #fff;
}
.contact-cta h4 { font-size: 17px; margin-bottom: 8px; }
.contact-cta p { font-size: 13px; opacity: 0.8; margin-bottom: 20px; }
.cta-phone {
  display: flex; align-items: center; gap: 10px;
  font-size: 22px; font-weight: 800; color: #fff;
  margin-bottom: 6px;
}
/* 地图占位 */
.contact-map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}
.map-placeholder {
  background: linear-gradient(135deg, var(--bg-light), #e8f0fe);
  aspect-ratio: 4/3;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px;
  color: var(--text-mid);
}
.map-icon { font-size: 56px; }
.map-address { font-size: 15px; font-weight: 600; text-align: center; padding: 0 24px; }
.map-note { font-size: 13px; color: var(--text-light); }

/* ============================================================
   底部 Footer
   ============================================================ */
#footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.75);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand { }
.footer-logo {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 16px;
}
.footer-logo img { height: 36px; width: auto; opacity: 0.9; }
.footer-slogan {
  font-size: 13px; color: rgba(255,255,255,0.5);
  font-style: italic; letter-spacing: 1px;
  margin-bottom: 20px;
}
.footer-desc {
  font-size: 13px; line-height: 1.8;
  color: rgba(255,255,255,0.5);
}
.footer-col h4 {
  font-size: 14px; font-weight: 700; color: #fff;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
}
.footer-links a:hover { color: #fff; }
.footer-contact-list { display: flex; flex-direction: column; gap: 10px; }
.footer-contact-item { font-size: 13px; color: rgba(255,255,255,0.55); line-height: 1.6; }
.footer-contact-item strong { color: rgba(255,255,255,0.8); display: block; }
/* 底部版权条 */
.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: #fff; }
/* SEO 文字描述 / 友情链接 */
.footer-seo {
  background: rgba(0,0,0,0.2);
  padding: 16px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.3);
  line-height: 1.7;
}
.footer-seo a {
  transition: color var(--transition);
}
.footer-seo a:hover {
  color: rgba(255,255,255,0.9) !important;
}

/* ============================================================
   回到顶部按钮
   ============================================================ */
#back-top {
  position: fixed;
  right: 28px; bottom: 100px;
  width: 46px; height: 46px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 16px rgba(0,114,188,0.35);
  cursor: pointer;
  opacity: 0; pointer-events: none;
  transition: all var(--transition);
  z-index: 900;
}
#back-top.visible { opacity: 1; pointer-events: auto; }
#back-top:hover { background: var(--primary-dark); transform: translateY(-3px); }

/* 悬浮联系 */
.float-contact {
  position: fixed;
  right: 28px; bottom: 160px;
  display: flex; flex-direction: column; gap: 10px;
  z-index: 900;
}
.float-btn {
  width: 46px; height: 46px;
  background: var(--primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; color: #fff;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  text-decoration: none;
  position: relative;
}
.float-btn:hover {
  background: var(--primary-dark);
  transform: scale(1.1);
  color: #fff;
}
.float-btn .tooltip {
  position: absolute;
  right: 56px; top: 50%;
  transform: translateY(-50%);
  background: var(--bg-dark);
  color: #fff;
  font-size: 12px; white-space: nowrap;
  padding: 5px 10px;
  border-radius: var(--radius);
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}
.float-btn:hover .tooltip { opacity: 1; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .strength-grid { grid-template-columns: repeat(2, 1fr); }
  .honor-grid { grid-template-columns: repeat(3, 1fr); }
  .partners-logos { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .patents-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --container: 100%; }
  .container { padding: 0 16px; }
  .section { padding: 56px 0; }

  /* Header */
  .topbar .container { flex-direction: column; gap: 4px; text-align: center; }
  .topbar-contact { justify-content: center; }
  .nav { display: none; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: #fff; padding: 16px; box-shadow: 0 8px 24px rgba(0,0,0,0.1); border-top: 1px solid var(--border); }
  .nav.open { display: flex; }
  .menu-toggle { display: flex; }
  .header-phone { display: none; }

  /* Banner */
  #banner { min-height: auto; padding: 60px 0; }
  .banner-stats { grid-template-columns: repeat(2, 1fr); }

  /* About */
  #about .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-badge-float { bottom: -10px; right: 10px; }
  .about-values { grid-template-columns: 1fr; }
  .timeline::before { left: 24px; }
  .timeline-item { grid-template-columns: 24px auto; grid-template-rows: auto auto; }
  .timeline-item:nth-child(odd) .timeline-content,
  .timeline-item:nth-child(even) .timeline-content { grid-column: 2; text-align: left; }
  .timeline-item:nth-child(odd) .timeline-dot,
  .timeline-item:nth-child(even) .timeline-dot { grid-column: 1; grid-row: 1; }
  .timeline-item:nth-child(odd) .timeline-empty,
  .timeline-item:nth-child(even) .timeline-empty { display: none; }
  .timeline-dot { width: 36px; height: 36px; font-size: 10px; }

  /* Strength */
  .strength-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-grid { grid-template-columns: 1fr; }

  /* RD */
  #rd .rd-grid { grid-template-columns: 1fr; }
  .tech-team { grid-template-columns: 1fr; }
  .patents-grid { grid-template-columns: 1fr 1fr; }

  /* Honor */
  .honor-grid { grid-template-columns: repeat(2, 1fr); }

  /* Partners */
  .partners-logos { grid-template-columns: repeat(2, 1fr); }

  /* Services */
  .services-grid { grid-template-columns: 1fr; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }

  /* Back top */
  .float-contact { bottom: 140px; right: 16px; }
  #back-top { right: 16px; bottom: 84px; }
}

@media (max-width: 480px) {
  .banner-stats { grid-template-columns: 1fr 1fr; }
  .strength-grid { grid-template-columns: 1fr 1fr; }
  .honor-grid { grid-template-columns: 1fr 1fr; }
  .partners-logos { grid-template-columns: repeat(2, 1fr); }
  .patents-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in-up { animation: fadeInUp 0.6s ease both; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* 数字滚动 */
.count-up { display: inline-block; }