/* Root Variables */
:root {
  --white: #FFFFFF;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-500: #64748B;
  --gray-700: #334155;
  --gray-900: #0F172A;
  --blue-primary: #0066FF;
  --blue-light: #3388FF;
  --blue-pale: #EFF6FF;
  --cyan-accent: #00D4FF;
  --gold: #D4AF37;
  --gold-light: #E8C547;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
  --shadow-xl: 0 12px 32px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-btn: 50px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-sans); color: var(--gray-900); background: var(--white); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; } img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-title { font-size: 2.25rem; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.02em; }
.section-subtitle { font-size: 1.05rem; color: var(--gray-500); margin-bottom: 56px; line-height: 1.6; }
.section-header { text-align: center; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 36px; border-radius: var(--radius-btn); font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: var(--transition); border: none; }
.btn-primary { background: var(--blue-primary); color: var(--white); }
.btn-primary:hover { background: var(--blue-light); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,102,255,0.3); }
.btn-gold { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: var(--white); }
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,175,55,0.35); }
.btn-outline { background: transparent; border: 2px solid var(--blue-primary); color: var(--blue-primary); }
.btn-outline:hover { background: var(--blue-primary); color: var(--white); }

.page-hero {
  background: 
    radial-gradient(circle at 85% 15%, rgba(0,102,255,0.05) 0%, transparent 35%),
    radial-gradient(circle at 15% 85%, rgba(0,212,255,0.04) 0%, transparent 35%),
    linear-gradient(180deg, #EDF5FF 0%, #F5FAFF 50%, #FFFFFF 100%);
  padding: 160px 0 120px;
  color: #0F172A;
  position: relative;
  overflow: hidden;
}

/* 全背景极淡网格点阵 */
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(30,60,120,0.25) 1.5px, transparent 1.5px);
  background-size: 32px 32px;
  opacity: 1.0;
  pointer-events: none;
}

/* 右下角大光晕 */
.page-hero::after {
  content: '';
  position: absolute;
  right: -150px;
  bottom: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,80,200,0.15) 0%, transparent 65%);
  pointer-events: none;
}

.page-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.page-hero-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: #0066FF;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.page-hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-hero-line {
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, #D4AF37, #F59E0B);
  border-radius: 2px;
  margin-bottom: 20px;
}

.page-hero p {
  font-size: 1.1rem;
  color: #64748B;
  line-height: 1.7;
  max-width: 560px;
}

.page-hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  z-index: 1;
}

@media (max-width: 768px) {
  .page-hero { padding: 120px 0 80px; }
  .page-hero h1 { font-size: 2.2rem; }
  .page-hero-wave { height: 50px; }
}

.page-hero-network {
  position: absolute;
  right: 8%;
  top: 50%;
  transform: translateY(-50%);
  width: 340px;
  height: 340px;
  z-index: 0;
  pointer-events: none;
  animation: network-rotate 40s linear infinite;
}

@keyframes network-rotate {
  from { transform: translateY(-50%) rotate(0deg); }
  to { transform: translateY(-50%) rotate(360deg); }
}

@media (max-width: 1024px) {
  .page-hero-network {
    width: 260px;
    height: 260px;
    right: 2%;
    opacity: 0.7;
  }
}

@media (max-width: 768px) {
  .page-hero-network { display: none; }
}

/* Contact Grid */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; margin-bottom: 80px; }

/* Contact Info */
.contact-info h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 32px; }
.contact-item { display: flex; gap: 20px; margin-bottom: 28px; padding: 24px; background: var(--gray-50); border-radius: var(--radius); transition: var(--transition); }
.contact-item:hover { background: var(--white); box-shadow: var(--shadow-md); transform: translateX(4px); }
.contact-icon { width: 56px; height: 56px; background: var(--blue-pale); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; flex-shrink: 0; transition: var(--transition); }
.contact-item:hover .contact-icon { background: linear-gradient(135deg, var(--blue-primary), var(--cyan-accent)); }
.contact-detail h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 6px; color: var(--gray-900); }
.contact-detail p { font-size: 0.9rem; color: var(--gray-500); line-height: 1.6; }
.contact-detail a { color: var(--blue-primary); font-weight: 500; }
.contact-detail a:hover { color: var(--blue-light); }

/* Form */
.contact-form h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 32px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 8px; color: var(--gray-700); }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 14px 18px; border: 1px solid var(--gray-200); border-radius: var(--radius); font-size: 0.9rem; font-family: var(--font-sans); transition: var(--transition); background: var(--white); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--blue-primary); box-shadow: 0 0 0 3px rgba(0,102,255,0.1); }
.form-group textarea { min-height: 120px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.submit-btn { width: 100%; padding: 16px; font-size: 1rem; margin-top: 8px; }

/* Map Section */
.map-section { background: var(--gray-50); border-radius: var(--radius-lg); overflow: hidden; }
.map-container { width: 100%; height: 400px; background: var(--gray-200); display: flex; align-items: center; justify-content: center; position: relative; }
.map-container iframe { width: 100%; height: 100%; border: 0; }
.map-placeholder { text-align: center; color: var(--gray-500); }
.map-placeholder p { margin-top: 12px; font-size: 0.9rem; }

/* Footer */
.footer { background: var(--gray-900); color: var(--gray-300); padding: 60px 0 30px; border-top: 1px solid #E2E8F0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer h4 { color: var(--white); font-size: 1rem; font-weight: 700; margin-bottom: 20px; }
.footer p, .footer li { font-size: 0.9rem; line-height: 1.8; margin-bottom: 8px; }
.footer a:hover { color: var(--white); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; text-align: center; font-size: 0.85rem; }

/* Fade-in */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.4, 0, 0.2, 1); }
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1024px) {
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav { display: none !important; }
  .mobile-toggle { display: flex; }
  .contact-grid { gap: 32px; }
  .contact-item { padding: 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 2rem; }
  .section { padding: 64px 0; }
  .form-row { grid-template-columns: 1fr; }
  .map-container { height: 300px; }
}
/* 移除所有元素的 focus outline */
*, *::before, *::after { outline: none !important; }
a:focus, a:focus:hover, a:active, a:focus-visible { outline: none !important; }
h4:focus, h4:focus:hover, h4:active { outline: none !important; }
span:focus, span:focus:hover, span:active { outline: none !important; }
div:focus, div:focus:hover, div:active { outline: none !important; }
button:focus, button:focus:hover, button:active { outline: none !important; }
[tabindex]:focus { outline: none !important; }
input:focus, textarea:focus, select:focus { outline: none !important; }

/* Navigation */
/* Navigation */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.85); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: none; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.nav.scrolled { background: rgba(255,255,255,0.95); box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; max-width: 1200px; margin: 0 auto; }
.logo { font-size: 1.25rem; font-weight: 800; color: var(--blue-primary); display: flex; align-items: center; gap: 10px; }
.logo span { font-weight: 500; font-size: 0.85rem; color: var(--gray-500); }



.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { font-size: 0.95rem; font-weight: 500; color: var(--gray-700); position: relative; outline: none !important; }
.nav-links a:hover, .nav-links a.active { color: var(--blue-primary); }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--blue-primary); transition: width 0.3s; }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-link { padding: 10px 24px; border-radius: 50px; color: var(--blue-primary); font-weight: 600; position: relative; outline: none !important; }
.nav-link:hover { color: var(--blue-primary); }
.nav-link::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--blue-primary); transition: width 0.3s; }
.nav-link:hover::after { width: 100%; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; }
.nav-toggle svg { width: 24px; height: 24px; }

a:focus { outline: none !important; }