/* ===== 全局变量 =====
   配色：浅底石墨蓝（商务）
   2026-09-10 由「深色底 + 金色」调整为「浅灰白底 + 石墨板岩蓝」
   注：旧变量名 --gold / --gold-light / --gold-dark 保留为别名，
       避免 7 个页面里大量 var(--gold) 引用失效。
*/
:root {
  /* —— 品牌主色 —— */
  --brand: #2f4858;          /* 主色：石墨板岩蓝 */
  --brand-light: #3d5a6e;    /* 主色·浅（hover） */
  --brand-dark: #22343f;     /* 主色·深（按钮渐变起点） */
  --brand-tint: rgba(47,72,88,0.08);

  /* —— 旧变量名别名（兼容历史页面） —— */
  --gold: var(--brand);
  --gold-light: var(--brand-light);
  --gold-dark: var(--brand-dark);

  /* —— 背景层 —— */
  --bg-dark: #f4f6f8;        /* 页面底色 */
  --bg-card: #ffffff;        /* 卡片 */
  --bg-card2: #fafbfc;       /* 次级卡片 */

  /* —— 文字层 —— */
  --text-primary: #141c22;
  --text-secondary: #55636e;
  --text-muted: #8695a1;

  /* —— 描边 / 阴影 —— */
  --border: rgba(47,72,88,0.22);
  --border-dark: #dfe4ea;
  --shadow-sm: 0 1px 2px rgba(20,35,60,0.05);
  --shadow-md: 0 6px 20px rgba(20,35,60,0.08);
  --shadow-lg: 0 12px 34px rgba(20,35,60,0.12);
  --shadow-gold: var(--shadow-md);

  /* —— 语义色（收敛为沉稳商务色） —— */
  --ok: #3f7a63;
  --warn: #a1544b;
  --info: #3f6478;
  --violet: #63557f;

  /* —— 尺度：商务风收紧圆角 —— */
  --nav-height: 72px;
  --radius: 6px;
  --radius-lg: 8px;
  --transition: all 0.25s ease;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; color-scheme: light; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dark);
  display: flex;
  align-items: center;
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-logo .logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 900; color: #ffffff;
}
.nav-logo .logo-text { line-height: 1.2; }
.nav-logo .logo-text .cn { font-size: 16px; font-weight: 700; color: var(--text-primary); }
.nav-logo .logo-text .en { font-size: 10px; color: var(--brand); letter-spacing: 1.2px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--brand);
  background: var(--brand-tint);
}
.nav-btn {
  background: var(--brand);
  color: #ffffff !important;
  font-weight: 700 !important;
  padding: 10px 22px !important;
  border-radius: var(--radius) !important;
  transition: var(--transition) !important;
}
.nav-btn:hover {
  background: var(--brand-dark) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(47,72,88,0.26) !important;
}
.nav-mobile-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
  padding: 4px;
}

/* ===== 容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
.page-wrap {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

/* ===== 页面标题区 ===== */
.page-hero {
  padding: 72px 0 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 600px; height: 300px;
  background: radial-gradient(ellipse, rgba(47,72,88,0.07) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero .tag {
  display: inline-block;
  border: 1px solid var(--border);
  color: var(--brand);
  font-size: 12px;
  letter-spacing: 2px;
  padding: 5px 16px;
  border-radius: 20px;
  margin-bottom: 20px;
  background: rgba(47,72,88,0.05);
}
.page-hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.page-hero h1 .gold { color: var(--brand); }
.page-hero p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ===== Section ===== */
.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .tag {
  display: inline-block;
  border: 1px solid var(--border);
  color: var(--brand);
  font-size: 11px;
  letter-spacing: 3px;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 14px;
  background: rgba(47,72,88,0.05);
  text-transform: uppercase;
}
.section-header h2 {
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
  letter-spacing: -0.4px;
}
.section-header h2 .gold { color: var(--brand); }
.section-header p {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto;
}

/* ===== 卡片 ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--brand), transparent);
  opacity: 0;
  transition: var(--transition);
}
.card:hover {
  border-color: rgba(47,72,88,0.24);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.card:hover::before { opacity: 1; }

/* ===== 分割线 ===== */
.divider {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-dark), transparent);
  margin: 40px 0;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}
.btn-gold {
  background: var(--brand);
  color: #ffffff;
}
.btn-gold:hover {
  background: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(47,72,88,0.26);
}
.btn-outline {
  background: transparent;
  color: var(--brand);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  background: var(--brand-tint);
  border-color: var(--brand);
  transform: translateY(-2px);
}
.btn-lg { padding: 16px 40px; font-size: 16px; }

/* ===== 标签 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
}
.badge-gold { background: rgba(47,72,88,0.09); color: var(--brand); border: 1px solid var(--border); }
.badge-blue { background: rgba(63,100,120,0.10); color: var(--info); border: 1px solid rgba(63,100,120,0.20); }
.badge-green { background: rgba(63,122,99,0.10); color: var(--ok); border: 1px solid rgba(63,122,99,0.20); }

/* ===== 数字统计 ===== */
.stat-num {
  font-size: 48px;
  font-weight: 900;
  color: var(--brand);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -1px;
}
.stat-unit { font-size: 20px; font-weight: 700; }
.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ===== 品牌色分隔装饰 ===== */
.gold-line {
  display: inline-block;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-dark), var(--brand));
  border-radius: 2px;
  margin: 12px auto;
}

/* ===== 表单 ===== */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}
.form-group label .req { color: var(--warn); margin-left: 3px; }
.form-control {
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
  font-family: inherit;
}
.form-control:focus {
  border-color: var(--brand);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(47,72,88,0.10);
}
.form-control::placeholder { color: var(--text-muted); }
textarea.form-control { resize: vertical; min-height: 100px; }
select.form-control { cursor: pointer; }

/* ===== 页脚 ===== */
.footer {
  background: #ffffff;
  border-top: 1px solid var(--border-dark);
  padding: 60px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand .logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 900; color: #ffffff;
}
.footer-brand p { font-size: 13px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
.footer-contact-item {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 13px; color: var(--text-secondary);
  margin-bottom: 10px;
}
.footer-contact-item .icon { color: var(--brand); margin-top: 2px; flex-shrink: 0; }
.footer-col h4 {
  font-size: 14px; font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-dark);
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--brand); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}
.footer-bottom .icp a { color: var(--text-muted); }
.footer-bottom .icp a:hover { color: var(--brand); }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .nav-mobile-btn { display: block; }
}
@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .btn-lg { padding: 14px 28px; font-size: 15px; }
}

/* ===== 滚动动画 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 装饰背景网格 ===== */
.bg-grid {
  background-image:
    linear-gradient(rgba(47,72,88,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47,72,88,0.045) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* ===== CTA 呼吁区域 ===== */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(135deg, #eef1f4, #e6ebef);
  overflow: hidden;
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse 80% 60% at 30% 40%, rgba(47,72,88,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 70% 60%, rgba(47,72,88,0.05) 0%, transparent 50%);
  pointer-events: none;
}
.cta-section h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
  letter-spacing: -0.6px;
}
.cta-section p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 520px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.cta-info {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.cta-info-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}
.cta-info-item .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}