/* ===== 润致GEO官网公共样式 ===== */
:root {
  --primary: #1a6af5;
  --primary-dark: #0d4fc2;
  --primary-light: #4a8ff9;
  --secondary: #00c8aa;
  --accent: #ff6b2b;
  --dark: #0d1a2e;
  --dark-2: #162035;
  --dark-3: #1e2d45;
  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --bg-light: #f7f9fc;
  --bg-white: #ffffff;
  --border: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
  --gradient-primary: linear-gradient(135deg, #1a6af5 0%, #00c8aa 100%);
  --gradient-dark: linear-gradient(135deg, #0d1a2e 0%, #162035 100%);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --nav-height: 70px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }
ul { list-style: none; }

/* === 通用容器 === */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
  display: inline-block;
  background: rgba(26,106,245,0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--dark);
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-title .highlight { color: var(--primary); }
.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* === 导航栏 === */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: all 0.3s ease;
}
.navbar.scrolled {
  box-shadow: var(--shadow-md);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo-icon {
  width: 40px; height: 40px;
  background: var(--gradient-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: white;
}
.nav-logo-text {
  display: flex;
  flex-direction: column;
}
.nav-logo-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.2;
}
.nav-logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 1px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: rgba(26,106,245,0.06);
}
.nav-cta {
  background: var(--gradient-primary);
  color: white !important;
  padding: 10px 22px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s;
  box-shadow: 0 4px 14px rgba(26,106,245,0.35);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(26,106,245,0.45);
  background: rgba(26,106,245,1);
}
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}
.nav-mobile-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: all 0.3s;
}

/* === 移动端导航 === */
@media (max-width: 900px) {
  .nav-mobile-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: white;
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-link { width: 100%; }
}

/* === 通用按钮 === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 32px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.3s;
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 16px rgba(26,106,245,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26,106,245,0.5);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}
.btn-white {
  background: white;
  color: var(--primary);
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.btn-sm { padding: 10px 22px; font-size: 13px; }
.btn-lg { padding: 18px 42px; font-size: 17px; }

/* === 卡片 === */
.card {
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: 32px;
  transition: all 0.3s;
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(26,106,245,0.2);
}
.card-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: rgba(26,106,245,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
}

/* === 统计数字 === */
.stat-num {
  font-size: 42px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

/* === 标签 === */
.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
}
.tag-blue { background: rgba(26,106,245,0.1); color: var(--primary); }
.tag-green { background: rgba(0,200,170,0.1); color: #00a88e; }
.tag-orange { background: rgba(255,107,43,0.1); color: var(--accent); }

/* === 页脚 === */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.8; }
.footer-brand .footer-logo {
  display: flex; align-items: center; gap: 10px;
  color: white; font-size: 20px; font-weight: 700;
}
.footer-logo-icon {
  width: 36px; height: 36px;
  background: var(--gradient-primary);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800; color: white;
}
.footer-col h4 {
  color: white;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  transition: color 0.2s;
}
.footer-col ul li a:hover { color: white; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-icp a { color: rgba(255,255,255,0.4); }
.footer-icp a:hover { color: rgba(255,255,255,0.7); }
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* === 页面顶部留白 === */
.page-top { padding-top: var(--nav-height); }

/* === 面包屑 === */
.breadcrumb {
  padding: 16px 0;
  font-size: 13px;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { margin: 0 8px; }

/* === 动画 === */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
.animate-fadeInUp { animation: fadeInUp 0.6s ease forwards; }
.animate-fadeIn { animation: fadeIn 0.5s ease forwards; }

/* === 表单 === */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 8px; color: var(--text-secondary); }
.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-primary);
  transition: border-color 0.2s;
  background: white;
}
.form-input:focus { outline: none; border-color: var(--primary); }
.form-textarea { min-height: 120px; resize: vertical; }
.form-select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-primary);
  background: white;
  appearance: none;
  cursor: pointer;
}
.form-select:focus { outline: none; border-color: var(--primary); }

/* === 分隔线 === */
.divider { height: 1px; background: var(--border); margin: 40px 0; }

/* === 徽章 === */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.3px;
}
.badge-primary { background: var(--primary); color: white; }
.badge-success { background: #10b981; color: white; }
.badge-warning { background: #f59e0b; color: white; }

/* === 提示框 === */
.alert {
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 10px;
}
.alert-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fca5a5; }
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* === 骨架屏 === */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: skeleton 1.5s infinite;
  border-radius: 4px;
}
@keyframes skeleton {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* === 滚动条美化 === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f1f1f1; }
::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #aaa; }

/* === 动画 === */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}