/* ============================================================
   浙江北岭科技有限公司 官网全局样式
   现代深色科技风 · 深蓝黑底 + 科技蓝/青色渐变
   ============================================================ */

:root {
  /* 配色 */
  --bg-deep: #0a0e1a;
  --bg-panel: #0d1322;
  --bg-card: #111a2e;
  --bg-card-2: #16223a;
  --line: rgba(120, 160, 255, 0.14);
  --line-strong: rgba(120, 160, 255, 0.28);

  --blue: #2e6bff;
  --cyan: #00d4ff;
  --grad: linear-gradient(135deg, #2e6bff 0%, #00d4ff 100%);

  --text: #e8eefc;
  --text-2: #8ba0c8;
  --text-3: #5a6b8f;

  /* 布局 */
  --nav-h: 76px;
  --container: 1200px;
  --radius: 16px;
  --radius-s: 10px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --shadow-blue: 0 10px 34px rgba(46, 107, 255, 0.35);
}

/* ============ 重置与基础 ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

::selection { background: rgba(46, 107, 255, 0.55); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 9px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: #24345a; border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: #2e6bff; }

/* ============ 工具类 ============ */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.section { padding: 96px 0; position: relative; }
.section-tight { padding: 64px 0; }

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.sec-head { text-align: center; margin-bottom: 56px; }
.sec-head .sec-kicker {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 14px;
  padding: 6px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(46, 107, 255, 0.08);
}
.sec-head h2 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 1px;
}
.sec-head .sec-line {
  width: 64px; height: 3px;
  background: var(--grad);
  border-radius: 3px;
  margin: 22px auto 0;
  position: relative;
}
.sec-head .sec-line::after {
  content: "";
  position: absolute;
  right: -8px; top: 0;
  width: 10px; height: 3px;
  background: var(--cyan);
  border-radius: 3px;
}
.sec-head p.sec-desc {
  margin-top: 18px;
  color: var(--text-2);
  font-size: 15px;
  max-width: 680px;
  margin-left: auto; margin-right: auto;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 34px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 44px rgba(46, 107, 255, 0.5); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line-strong);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-3px); }

/* 玻璃卡片 */
.glass-card {
  background: linear-gradient(160deg, rgba(22, 34, 58, 0.82), rgba(13, 19, 34, 0.9));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.glass-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.45);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.5), 0 0 30px rgba(46, 107, 255, 0.12);
}

/* 网格 */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* 滚动渐入动画 */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in-view { opacity: 1; transform: none; }
.reveal-left { opacity: 0; transform: translateX(-44px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-right { opacity: 0; transform: translateX(44px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-left.in-view, .reveal-right.in-view { opacity: 1; transform: none; }
.delay-1 { transition-delay: 0.12s; }
.delay-2 { transition-delay: 0.24s; }
.delay-3 { transition-delay: 0.36s; }

/* ============ 顶部导航 ============ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.35s ease, border-color 0.35s ease, height 0.35s ease;
}
.navbar.scrolled {
  background: rgba(10, 14, 26, 0.88);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
  height: 64px;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-logo img {
  width: 44px; height: 44px;
  border-radius: 10px;
  object-fit: cover;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
}
.nav-logo .logo-text { line-height: 1.25; }
.nav-logo .logo-text b {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 2px;
  display: block;
}
.nav-logo .logo-text span {
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 3px;
  display: block;
}
.nav-links { display: flex; align-items: center; gap: 38px; }
.nav-links a {
  font-size: 15px;
  color: var(--text-2);
  position: relative;
  padding: 6px 0;
  transition: color 0.3s ease;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--grad);
  border-radius: 2px;
  transition: width 0.3s ease;
}
.nav-links a:hover, .nav-links a.active { color: #fff; }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-tel {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--cyan);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.nav-tel:hover { text-shadow: 0 0 18px rgba(0, 212, 255, 0.8); }
/* nav 内的电话仅移动端菜单显示，桌面端隐藏（避免与 nav 外电话重复） */
.nav-links .nav-tel-mobile { display: none; }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 26px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero 首页主视觉 ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 40px) 0 60px;
  overflow: hidden;
  background:
    radial-gradient(900px 480px at 78% -10%, rgba(46, 107, 255, 0.22), transparent 60%),
    radial-gradient(700px 420px at 8% 110%, rgba(0, 212, 255, 0.12), transparent 60%),
    var(--bg-deep);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 160, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, 0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 85% 70% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 85% 70% at 50% 40%, #000 30%, transparent 75%);
}
#particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--cyan);
  padding: 8px 22px;
  border: 1px solid rgba(0, 212, 255, 0.35);
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.06);
  margin-bottom: 30px;
}
.hero-badge::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.hero h1 {
  font-size: clamp(36px, 6vw, 62px);
  font-weight: 800;
  letter-spacing: 2px;
  line-height: 1.3;
  margin-bottom: 24px;
}
.hero .hero-sub {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--text-2);
  max-width: 640px;
  margin: 0 auto 40px;
  letter-spacing: 0.5px;
}
.hero-cta { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 2;
  width: 26px; height: 44px;
  border: 2px solid var(--text-3);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.hero-scroll::after {
  content: "";
  width: 4px; height: 10px;
  background: var(--cyan);
  border-radius: 4px;
  animation: scroll-dot 1.6s ease-in-out infinite;
}
@keyframes scroll-dot {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(14px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ============ 数据亮点 ============ */
.stats-section { padding: 70px 0; position: relative; }
.stats-wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item {
  text-align: center;
  padding: 38px 20px;
  position: relative;
  overflow: hidden;
}
.stat-item::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 46px; height: 3px;
  background: var(--grad);
  border-radius: 3px;
}
.stat-num {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.stat-num .unit { font-size: 24px; margin-left: 2px; }
.stat-label { margin-top: 10px; color: var(--text-2); font-size: 14px; letter-spacing: 1px; }

/* ============ 通用卡片 ============ */
.card-icon {
  width: 58px; height: 58px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(46, 107, 255, 0.22), rgba(0, 212, 255, 0.14));
  border: 1px solid rgba(0, 212, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--cyan);
}
.card-icon svg { width: 28px; height: 28px; }
.card h3 { font-size: 19px; font-weight: 600; margin-bottom: 10px; letter-spacing: 0.5px; }
.card p { color: var(--text-2); font-size: 14.5px; }
.biz-card { padding: 32px 26px; }
.biz-card:hover .card-icon { box-shadow: 0 0 22px rgba(0, 212, 255, 0.35); }

/* 简介区（首页/关于页共用） */
.intro-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 60px; align-items: center; }
.intro-kicker {
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--cyan);
  margin-bottom: 14px;
}
.intro-grid h2 { font-size: 34px; font-weight: 700; line-height: 1.4; margin-bottom: 22px; letter-spacing: 1px; }
.intro-grid p { color: var(--text-2); margin-bottom: 16px; font-size: 15px; }
.intro-feats { margin-top: 26px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.intro-feats li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text);
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: rgba(17, 26, 46, 0.55);
}
.intro-feats li svg { width: 18px; height: 18px; color: var(--cyan); flex-shrink: 0; }

/* 可视化面板（简介配图占位） */
.visual-panel {
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, rgba(22, 34, 58, 0.9), rgba(13, 19, 34, 0.95));
  padding: 30px;
  overflow: hidden;
}
.visual-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 160, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.vp-bar { display: flex; gap: 8px; margin-bottom: 22px; }
.vp-bar i { width: 12px; height: 12px; border-radius: 50%; }
.vp-bar i:nth-child(1) { background: #ff5f57; }
.vp-bar i:nth-child(2) { background: #febc2e; }
.vp-bar i:nth-child(3) { background: #28c840; }
.vp-title { font-size: 13px; color: var(--text-3); letter-spacing: 2px; margin-bottom: 20px; }
.vp-chart { display: flex; align-items: flex-end; gap: 14px; height: 160px; position: relative; z-index: 1; }
.vp-chart .bar {
  flex: 1;
  border-radius: 6px 6px 0 0;
  background: linear-gradient(180deg, var(--cyan), rgba(46, 107, 255, 0.25));
  opacity: 0.9;
  position: relative;
  transition: transform 0.4s ease;
}
.vp-chart .bar:hover { transform: scaleY(1.04); }
.vp-chart .bar:nth-child(odd) { background: linear-gradient(180deg, var(--blue), rgba(46, 107, 255, 0.2)); }
.vp-tags { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 10px; position: relative; z-index: 1; }
.vp-tags span {
  font-size: 12.5px;
  color: var(--text-2);
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(46, 107, 255, 0.08);
}
.vp-float {
  position: absolute;
  right: 22px; bottom: 22px;
  padding: 14px 20px;
  border-radius: var(--radius-s);
  background: rgba(10, 14, 26, 0.85);
  border: 1px solid var(--line-strong);
  font-size: 13px;
  color: var(--text-2);
  z-index: 1;
}
.vp-float b { display: block; font-size: 24px; color: var(--cyan); font-variant-numeric: tabular-nums; }

/* ============ 一站式服务流程 ============ */
.flow-steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; position: relative; }
.flow-step {
  text-align: center;
  padding: 30px 14px;
  position: relative;
}
.flow-step .fs-num {
  width: 52px; height: 52px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  background: var(--grad);
  color: #fff;
  box-shadow: var(--shadow-blue);
  position: relative;
  z-index: 2;
}
.flow-step h4 { font-size: 15.5px; margin-bottom: 8px; }
.flow-step p { font-size: 12.5px; color: var(--text-3); }
.flow-step::after {
  content: "";
  position: absolute;
  top: 26px;
  left: calc(50% + 34px);
  width: calc(100% - 34px);
  height: 2px;
  background: linear-gradient(90deg, rgba(0, 212, 255, 0.4), rgba(46, 107, 255, 0.1));
}
.flow-step:last-child::after { display: none; }

/* ============ 成果案例 ============ */
.showcase-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.showcase-card { padding: 36px 32px; position: relative; overflow: hidden; }
.showcase-card::after {
  content: "";
  position: absolute;
  top: -60px; right: -60px;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.14), transparent 70%);
}
.showcase-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--cyan);
  padding: 5px 14px;
  border: 1px solid rgba(0, 212, 255, 0.35);
  border-radius: 999px;
  margin-bottom: 16px;
  background: rgba(0, 212, 255, 0.06);
}
.showcase-card h3 { font-size: 22px; margin-bottom: 12px; }
.showcase-card p { color: var(--text-2); font-size: 14.5px; margin-bottom: 18px; }
.showcase-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.showcase-meta span {
  font-size: 12.5px;
  color: var(--text-2);
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(46, 107, 255, 0.1);
  border: 1px solid var(--line);
}

/* 合作区 */
.partner-wrap {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 40px;
  align-items: center;
  padding: 44px 48px;
}
.partner-logo-badge {
  width: 150px; height: 150px;
  margin: 0 auto;
  border-radius: 50%;
  border: 2px dashed rgba(0, 212, 255, 0.4);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--cyan);
  text-align: center;
}
.partner-logo-badge svg { width: 40px; height: 40px; }
.partner-logo-badge b { font-size: 16px; letter-spacing: 1px; }
.partner-logo-badge span { font-size: 11px; color: var(--text-3); }
.partner-info h3 { font-size: 22px; margin-bottom: 14px; }
.partner-info p { color: var(--text-2); font-size: 14.5px; margin-bottom: 12px; }
.partner-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.partner-tags span {
  font-size: 13px;
  color: var(--text);
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(17, 26, 46, 0.6);
}

/* ============ 新闻卡片 ============ */
.news-card { padding: 26px 26px; display: flex; flex-direction: column; }
.news-date {
  font-size: 12.5px;
  color: var(--text-3);
  letter-spacing: 1px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.news-date svg { width: 15px; height: 15px; color: var(--cyan); }
.news-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 10px; line-height: 1.5; }
.news-card h3 a:hover { color: var(--cyan); }
.news-card p { color: var(--text-2); font-size: 14px; flex: 1; }
.news-more {
  margin-top: 16px;
  font-size: 13.5px;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.news-more:hover { text-shadow: 0 0 14px rgba(0, 212, 255, 0.7); }

/* ============ 页脚 ============ */
.footer {
  position: relative;
  background: var(--bg-panel);
  border-top: 1px solid var(--line);
  padding: 72px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 48px;
}
.footer h4 {
  font-size: 15px;
  letter-spacing: 2px;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}
.footer h4::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 28px; height: 2px;
  background: var(--grad);
}
.footer-about .flogo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-about .flogo img { width: 42px; height: 42px; border-radius: 9px; object-fit: cover; background: #fff; }
.footer-about .flogo b { font-size: 17px; letter-spacing: 1px; }
.footer-about p { color: var(--text-2); font-size: 13.5px; margin-bottom: 18px; max-width: 300px; }
.footer-links li { margin-bottom: 11px; }
.footer-links a {
  color: var(--text-2);
  font-size: 14px;
  transition: color 0.3s ease, padding-left 0.3s ease;
}
.footer-links a:hover { color: var(--cyan); padding-left: 6px; }
.footer-contact li {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--text-2);
  font-size: 13.5px;
  line-height: 1.6;
}
.footer-contact svg { width: 17px; height: 17px; color: var(--cyan); flex-shrink: 0; margin-top: 4px; }
.footer-contact a:hover { color: var(--cyan); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--text-3);
}
.footer-bottom a:hover { color: var(--cyan); }

/* ============ 内页 Hero（横幅） ============ */
.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 90px) 0 80px;
  text-align: center;
  overflow: hidden;
  background:
    radial-gradient(700px 340px at 70% 0%, rgba(46, 107, 255, 0.2), transparent 60%),
    radial-gradient(560px 300px at 20% 100%, rgba(0, 212, 255, 0.1), transparent 60%),
    var(--bg-deep);
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 160, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 90% at 50% 0%, #000 25%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 90% at 50% 0%, #000 25%, transparent 75%);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: clamp(32px, 5vw, 48px); font-weight: 800; letter-spacing: 2px; margin-bottom: 16px; }
.page-hero .crumb { font-size: 13.5px; color: var(--text-3); letter-spacing: 1px; }
.page-hero .crumb a:hover { color: var(--cyan); }
.page-hero .crumb b { color: var(--cyan); font-weight: 500; }

/* ============ 关于页：时间线 ============ */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 34px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 9px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue), var(--cyan), transparent);
}
.tl-item { position: relative; padding-bottom: 44px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -34px; top: 8px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 3px solid var(--cyan);
  box-shadow: 0 0 14px rgba(0, 212, 255, 0.5);
}
.tl-year {
  font-size: 15px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 1px;
  margin-bottom: 6px;
}
.tl-item h4 { font-size: 18px; margin-bottom: 8px; }
.tl-item p { color: var(--text-2); font-size: 14.5px; }

/* 企业文化卡 */
.culture-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.culture-card { padding: 36px 30px; text-align: center; }
.culture-card .card-icon { margin: 0 auto 20px; }
.culture-card h3 { font-size: 18px; margin-bottom: 12px; }
.culture-card p { color: var(--text-2); font-size: 14px; }
.culture-card .en {
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--text-3);
  text-transform: uppercase;
  margin-bottom: 6px;
}

/* ============ 业务页：技术卡 ============ */
.tech-card { padding: 34px 28px; }
.tech-card .card-icon { width: 64px; height: 64px; border-radius: 18px; }
.tech-card .card-icon svg { width: 32px; height: 32px; }
.tech-list { margin-top: 14px; display: grid; gap: 8px; }
.tech-list li { font-size: 13.5px; color: var(--text-2); display: flex; gap: 8px; align-items: baseline; }
.tech-list li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); flex-shrink: 0; transform: translateY(-1px); }

/* 业态矩阵分组 */
.field-group { margin-bottom: 52px; }
.field-group:last-child { margin-bottom: 0; }
.field-group-title {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.field-group-title::before {
  content: "";
  width: 26px; height: 4px;
  background: var(--grad);
  border-radius: 4px;
}
.field-group-title span { font-size: 13px; color: var(--text-3); font-weight: 400; }

/* ============ 资质页 ============ */
.qual-card { padding: 30px 26px; display: flex; gap: 20px; align-items: flex-start; }
.qual-card .card-icon { width: 52px; height: 52px; flex-shrink: 0; margin-bottom: 0; }
.qual-card h3 { font-size: 16.5px; margin-bottom: 8px; }
.qual-card p { font-size: 13px; color: var(--text-2); }
.qual-level {
  display: inline-block;
  font-size: 12px;
  color: var(--cyan);
  border: 1px solid rgba(0, 212, 255, 0.4);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 8px;
}
.big-num-card { text-align: center; padding: 40px 20px; }
.big-num-card .num { font-size: 52px; font-weight: 800; font-variant-numeric: tabular-nums; }
.big-num-card .label { color: var(--text-2); font-size: 14px; margin-top: 6px; letter-spacing: 1px; }
.big-num-card .sub { color: var(--text-3); font-size: 12.5px; margin-top: 4px; }

/* ============ 新闻列表页 ============ */
.news-list { max-width: 900px; margin: 0 auto; }
.news-item {
  padding: 30px 32px;
  margin-bottom: 22px;
  display: flex;
  gap: 26px;
  align-items: flex-start;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.news-item:hover { transform: translateX(6px); border-color: rgba(0, 212, 255, 0.45); }
.news-item .ni-date {
  flex-shrink: 0;
  width: 74px;
  text-align: center;
  padding: 12px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: rgba(46, 107, 255, 0.08);
}
.news-item .ni-date b { display: block; font-size: 24px; font-weight: 800; color: var(--cyan); line-height: 1.2; }
.news-item .ni-date span { font-size: 12px; color: var(--text-3); }
.news-item h3 { font-size: 18px; margin-bottom: 8px; }
.news-item h3 a:hover { color: var(--cyan); }
.news-item p { color: var(--text-2); font-size: 14px; }
.news-item .ni-src { font-size: 12px; color: var(--text-3); margin-top: 10px; display: inline-block; }

/* ============ 联系页 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 28px; align-items: start; }
.contact-info-card { padding: 40px 34px; }
.ci-item { display: flex; gap: 18px; margin-bottom: 30px; }
.ci-item:last-child { margin-bottom: 0; }
.ci-item .card-icon { width: 50px; height: 50px; margin-bottom: 0; flex-shrink: 0; }
.ci-item h4 { font-size: 15px; margin-bottom: 4px; }
.ci-item p, .ci-item a { color: var(--text-2); font-size: 14px; word-break: break-all; }
.ci-item a:hover { color: var(--cyan); }
.form-card { padding: 40px 36px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13.5px; color: var(--text-2); margin-bottom: 8px; letter-spacing: 0.5px; }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(10, 14, 26, 0.7);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  color: var(--text);
  font-size: 14.5px;
  font-family: inherit;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  outline: none;
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-group input:focus, .form-group textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.12);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-3); }
.form-tip { font-size: 12.5px; color: var(--text-3); margin-top: 12px; }
/* 地图容器（高德 JS API） */
.map-wrap {
  margin-top: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--bg-panel);
}
.map-box {
  position: relative;
  height: 380px;
  width: 100%;
}
.map-loading {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-3);
  font-size: 14px;
  letter-spacing: 1px;
  background:
    radial-gradient(400px 240px at 30% 30%, rgba(46, 107, 255, 0.15), transparent 65%),
    linear-gradient(160deg, var(--bg-card), var(--bg-panel));
}
.map-loading svg { width: 44px; height: 44px; color: var(--cyan); }
.map-loading span { letter-spacing: 1px; }
/* 天地图深色风格（CSS 滤镜，初始化成功后由 map.js 添加） */
.map-box.tdt-dark {
  filter: invert(0.92) hue-rotate(180deg) saturate(0.75);
}

/* ============ 顶部返回按钮 ============ */
.back-top {
  position: fixed;
  right: 26px; bottom: 30px;
  width: 46px; height: 46px;
  border-radius: 12px;
  background: rgba(17, 26, 46, 0.9);
  border: 1px solid var(--line-strong);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all 0.35s ease;
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { background: var(--blue); color: #fff; box-shadow: var(--shadow-blue); }
.back-top svg { width: 20px; height: 20px; }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .flow-steps { grid-template-columns: repeat(3, 1fr); gap: 26px 18px; }
  .flow-step:nth-child(3)::after { display: none; }
  .intro-grid { gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 68px 0; }
  .sec-head h2 { font-size: 30px; }

  /* 移动端导航 */
  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: 78%;
    max-width: 340px;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    gap: 30px;
    background: rgba(10, 14, 26, 0.97);
    border-left: 1px solid var(--line);
    transition: right 0.4s ease;
    z-index: 999;
    padding: 60px 40px;
  }
  .nav-links.open { right: 0; }
  .nav-links a { font-size: 17px; }
  .nav-toggle { display: flex; z-index: 1000; position: relative; }
  .nav-tel { display: none; }
  .nav-links .nav-tel-mobile { display: inline-flex; }

  .stats-wrap { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .stat-num { font-size: 38px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .intro-grid { grid-template-columns: 1fr; }
  .intro-feats { grid-template-columns: 1fr 1fr; }
  .showcase-grid { grid-template-columns: 1fr; }
  .partner-wrap { grid-template-columns: 1fr; padding: 36px 26px; text-align: center; }
  .partner-tags { justify-content: center; }
  .flow-steps { grid-template-columns: 1fr 1fr; }
  .flow-step::after { display: none; }
  .culture-grid { grid-template-columns: 1fr; }
  .timeline { padding-left: 26px; }
  .tl-item::before { left: -26px; }
  .news-item { flex-direction: column; gap: 12px; }
  .news-item .ni-date { display: flex; align-items: baseline; gap: 8px; width: auto; padding: 8px 14px; }
  .news-item .ni-date b { font-size: 18px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .stats-wrap { grid-template-columns: 1fr 1fr; }
  .flow-steps { grid-template-columns: 1fr; }
  .hero h1 { letter-spacing: 1px; }
  .hero-cta { flex-direction: column; align-items: center; }
  .intro-feats { grid-template-columns: 1fr; }
}