/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #0B2D6E;
  --primary-light: #1a4db0;
  --accent: #E8720C;
  --accent-light: #f5952e;
  --dark: #0a1628;
  --gray-900: #111827;
  --gray-700: #374151;
  --gray-500: #6B7280;
  --gray-300: #D1D5DB;
  --gray-100: #F3F4F6;
  --white: #FFFFFF;
  --shadow: 0 4px 24px rgba(0,0,0,0.12);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.18);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--gray-700);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 16px;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(11, 45, 110, 0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition);
}
.navbar.scrolled { background: rgba(11, 45, 110, 0.98); box-shadow: 0 2px 20px rgba(0,0,0,0.3); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.nav-logo {
  display: flex; align-items: center; gap: 12px;
  color: var(--white); font-weight: 800; font-size: 18px;
}
.nav-logo-img {
  width: 44px; height: 44px;
  object-fit: contain;
  border-radius: 8px;
}
.nav-links { display: flex; gap: 8px; }
.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: 14px; font-weight: 500;
  padding: 8px 16px;
  border-radius: 6px;
  transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
  background: rgba(255,255,255,0.1);
}
.nav-cta {
  background: var(--accent);
  color: var(--white);
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.nav-cta:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}
.hero-label {
  display: inline-block;
  background: rgba(232, 114, 12, 0.2);
  color: var(--accent);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 24px;
}
.hero-title span {
  color: var(--accent);
}
.hero-desc {
  font-size: 18px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 40px;
  line-height: 1.8;
}
.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(232, 114, 12, 0.4);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
}

/* ===== CARDS ===== */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.card-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
}
.card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}
.card-desc {
  color: var(--gray-500);
  font-size: 15px;
}

/* ===== GRID ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

/* ===== STATS ===== */
.stats {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 80px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
.stat-item { color: var(--white); }
.stat-number {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  color: var(--accent);
}
.stat-label {
  font-size: 15px;
  opacity: 0.8;
  margin-top: 8px;
}

/* ===== FEATURES ===== */
.features { background: var(--gray-100); }
.feature-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
}

/* ===== PROCESS ===== */
.process-steps {
  display: flex;
  justify-content: space-between;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.step {
  text-align: center;
  position: relative;
  flex: 1;
}
.step-num {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: var(--white);
  border: 3px solid var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
}
.step.active .step-num {
  background: var(--primary);
  color: var(--white);
}
.step-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.step-desc {
  font-size: 14px;
  color: var(--gray-500);
  max-width: 200px;
  margin: 0 auto;
}

/* ===== CTA ===== */
.cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  text-align: center;
  padding: 100px 0;
}
.cta-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
}
.cta-desc {
  font-size: 18px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--dark);
  color: var(--white);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}
.footer-brand {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-brand img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}
.footer-desc {
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  line-height: 1.8;
}
.footer-title {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
  color: var(--white);
}
.footer-links a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  padding: 6px 0;
  transition: var(--transition);
}
.footer-links a:hover {
  color: var(--accent);
}
.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  color: rgba(255,255,255,0.4);
  font-size: 13px;
}

/* ===== FORMS ===== */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 8px;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 15px;
  transition: var(--transition);
  background: var(--white);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11, 45, 110, 0.1);
}
.form-textarea { resize: vertical; min-height: 120px; }

/* ===== PAGE HERO ===== */
.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 140px 0 80px;
  text-align: center;
}
.page-hero-label {
  display: inline-block;
  background: rgba(232, 114, 12, 0.2);
  color: var(--accent);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.page-hero-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  color: var(--white);
}
.page-hero-desc {
  font-size: 18px;
  color: rgba(255,255,255,0.75);
  margin-top: 16px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
  .nav-links { display: none; }
  .hero-content { text-align: center; }
  .hero-btns { justify-content: center; }
  .process-steps { flex-direction: column; gap: 32px; }
  .process-steps::before { display: none; }
  .step { max-width: 100%; }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-header { margin-bottom: 40px; }
  .grid-3 { grid-template-columns: 1fr; }
}