/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1a56db;
  --primary-dark: #1341b2;
  --primary-light: #3b82f6;
  --accent: #f59e0b;
  --accent-light: #fcd34d;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --dark-3: #334155;
  --mid: #64748b;
  --light: #f1f5f9;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, #1a56db 0%, #0ea5e9 100%);
  --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(26,86,219,0.12);
  --shadow-lg: 0 16px 48px rgba(15,23,42,0.18);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  color: var(--dark);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 0;
  background: rgba(255,255,255,0.0);
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.navbar.scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: 0 2px 20px rgba(15,23,42,0.1);
  padding: 0;
}
.nav-container {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
  width: 92%; max-width: 1200px; margin: 0 auto;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
}
.logo-icon {
  font-size: 1.3rem; font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
}
.logo-text {
  font-size: 0.95rem; color: var(--mid); font-weight: 400;
}
.navbar.scrolled .logo-text { color: var(--dark-3); }

.nav-links {
  display: flex; align-items: center; gap: 36px;
}
.nav-link {
  font-size: 0.92rem; font-weight: 500;
  color: rgba(255,255,255,0.88);
  position: relative; padding: 4px 0;
}
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.navbar.scrolled .nav-link { color: var(--dark-3); }
.nav-link:hover { color: var(--primary-light); }
.navbar.scrolled .nav-link:hover { color: var(--primary); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span {
  width: 26px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
  display: block;
}
.navbar.scrolled .nav-toggle span { background: var(--dark); }

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  background: var(--gradient-dark);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
  text-align: center;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-particle {
  position: absolute; border-radius: 50%;
  background: rgba(59,130,246,0.12);
  animation: float 8s ease-in-out infinite;
}
#p1 { width: 400px; height: 400px; top: -100px; left: -120px; animation-delay: 0s; }
#p2 { width: 280px; height: 280px; bottom: -60px; right: -60px; animation-delay: -2s; background: rgba(245,158,11,0.08); }
#p3 { width: 180px; height: 180px; top: 40%; right: 10%; animation-delay: -4s; }
#p4 { width: 120px; height: 120px; bottom: 20%; left: 12%; animation-delay: -6s; background: rgba(14,165,233,0.12); }

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.hero-content {
  position: relative; z-index: 2;
  max-width: 800px; padding: 0 24px;
  animation: fadeUp 0.9s ease both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-badge {
  display: inline-block;
  border: 1px solid rgba(245,158,11,0.5);
  color: var(--accent-light);
  font-size: 0.82rem; letter-spacing: 4px; font-weight: 500;
  padding: 6px 22px; border-radius: 40px;
  margin-bottom: 28px;
  animation: fadeUp 0.9s 0.1s ease both;
}
.hero-title {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 900; line-height: 1.15;
  color: var(--white);
  margin-bottom: 12px;
  animation: fadeUp 0.9s 0.2s ease both;
}
.hero-title-en {
  font-size: clamp(1.4rem, 3.5vw, 2.2rem);
  font-weight: 300;
  background: linear-gradient(90deg, #60a5fa, #38bdf8, #f59e0b);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-desc {
  color: rgba(255,255,255,0.7);
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  line-height: 1.9; margin-bottom: 40px;
  animation: fadeUp 0.9s 0.3s ease both;
}
.hero-actions {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
  animation: fadeUp 0.9s 0.4s ease both;
}
.btn {
  padding: 14px 36px; border-radius: 50px;
  font-size: 0.95rem; font-weight: 600; letter-spacing: 1px;
  cursor: pointer; transition: var(--transition);
  border: 2px solid transparent;
  display: inline-block;
}
.btn-primary {
  background: var(--gradient); color: var(--white);
  box-shadow: 0 4px 20px rgba(26,86,219,0.4);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(26,86,219,0.55); }
.btn-outline {
  border-color: rgba(255,255,255,0.4); color: var(--white);
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(8px);
}
.btn-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.14); transform: translateY(-3px); }

.hero-scroll {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,0.4); font-size: 0.78rem;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  animation: fadeUp 1s 0.8s ease both;
}
.scroll-arrow {
  width: 20px; height: 20px;
  border-right: 2px solid rgba(255,255,255,0.3);
  border-bottom: 2px solid rgba(255,255,255,0.3);
  transform: rotate(45deg);
  animation: bounce 1.5s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50% { transform: rotate(45deg) translateY(6px); }
}

/* ===== Stats ===== */
.stats {
  background: var(--white);
  padding: 60px 0;
  border-bottom: 1px solid rgba(226,232,240,0.8);
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
}
.stat-item {
  text-align: center; padding: 24px;
  border-right: 1px solid #e2e8f0;
}
.stat-item:last-child { border-right: none; }
.stat-number {
  font-size: 2.8rem; font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  line-height: 1;
}
.stat-unit { font-size: 1rem; color: var(--mid); margin-top: 2px; }
.stat-label { font-size: 0.88rem; color: var(--mid); margin-top: 8px; }

/* ===== Section Header ===== */
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  background: rgba(26,86,219,0.08);
  color: var(--primary);
  font-size: 0.8rem; font-weight: 600; letter-spacing: 3px;
  padding: 5px 18px; border-radius: 30px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 900; color: var(--dark); margin-bottom: 14px;
  line-height: 1.2;
}
.section-desc { color: var(--mid); font-size: 1rem; }

/* ===== About ===== */
.about { padding: 100px 0; background: var(--light); }
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.about-intro p {
  color: var(--dark-3); line-height: 1.9; margin-bottom: 16px;
}
.about-intro strong { color: var(--primary); }

.company-info-cards {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  margin-top: 28px;
}
.info-card {
  background: var(--white); border-radius: var(--radius-sm);
  padding: 14px 16px; display: flex; gap: 12px; align-items: flex-start;
  border: 1px solid rgba(226,232,240,0.8);
  transition: var(--transition);
}
.info-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow); transform: translateY(-2px); }
.info-card-icon { font-size: 1.3rem; flex-shrink: 0; }
.info-card-label { font-size: 0.75rem; color: var(--mid); margin-bottom: 3px; }
.info-card-value { font-size: 0.88rem; font-weight: 600; color: var(--dark); line-height: 1.4; }

.about-visual { display: flex; flex-direction: column; gap: 20px; align-items: center; }
.visual-card {
  width: 100%; max-width: 360px;
  background: var(--gradient-dark); border-radius: 24px;
  padding: 48px 36px; text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative; overflow: hidden;
}
.visual-card::before {
  content: ''; position: absolute;
  width: 200px; height: 200px; top: -60px; right: -60px;
  background: rgba(59,130,246,0.12); border-radius: 50%;
}
.visual-inner { position: relative; z-index: 1; }
.visual-icon-big {
  font-size: 5rem; font-weight: 900;
  background: linear-gradient(135deg, #60a5fa, #f59e0b);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 20px; line-height: 1;
}
.visual-lines { display: flex; flex-direction: column; gap: 10px; }
.visual-line {
  font-size: 0.9rem; color: rgba(255,255,255,0.75);
  border-left: 2px solid var(--accent); padding-left: 12px; text-align: left;
  letter-spacing: 1px;
}
.about-badge-wrap { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.about-badge {
  padding: 8px 20px; border-radius: 30px; font-size: 0.85rem; font-weight: 600;
  background: var(--white); color: var(--primary);
  border: 2px solid rgba(26,86,219,0.2);
  box-shadow: 0 2px 12px rgba(26,86,219,0.08);
  transition: var(--transition);
}
.about-badge:hover { background: var(--primary); color: var(--white); transform: translateY(-2px); }

/* ===== Services ===== */
.services { padding: 100px 0; background: var(--white); }
.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.service-card {
  background: var(--light); border-radius: var(--radius);
  padding: 36px 28px;
  border: 2px solid transparent;
  transition: var(--transition);
  position: relative; overflow: hidden;
}
.service-card::before {
  content: ''; position: absolute; inset: 0;
  background: var(--gradient); opacity: 0;
  transition: opacity var(--transition);
  z-index: 0;
}
.service-card:hover { border-color: var(--primary-light); transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.service-card:hover::before { opacity: 0.04; }
.service-icon { font-size: 2.4rem; margin-bottom: 16px; position: relative; z-index: 1; }
.service-title {
  font-size: 1.15rem; font-weight: 700; color: var(--dark);
  margin-bottom: 12px; position: relative; z-index: 1;
}
.service-desc {
  font-size: 0.9rem; color: var(--mid); line-height: 1.8;
  margin-bottom: 20px; position: relative; z-index: 1;
}
.service-tags { display: flex; gap: 8px; flex-wrap: wrap; position: relative; z-index: 1; }
.service-tags span {
  font-size: 0.75rem; padding: 3px 12px; border-radius: 20px;
  background: rgba(26,86,219,0.08); color: var(--primary); font-weight: 500;
}

/* ===== Values ===== */
.values { padding: 100px 0; background: var(--gradient-dark); }
.values .section-tag { background: rgba(245,158,11,0.15); color: var(--accent-light); }
.values .section-title { color: var(--white); }
.values-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px;
}
.value-item {
  display: flex; gap: 24px; align-items: flex-start;
  background: rgba(255,255,255,0.05); border-radius: var(--radius);
  padding: 32px; border: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition);
  backdrop-filter: blur(6px);
}
.value-item:hover { background: rgba(255,255,255,0.09); transform: translateY(-4px); }
.value-num {
  font-size: 2.5rem; font-weight: 900; line-height: 1;
  background: linear-gradient(135deg, #60a5fa, #f59e0b);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  flex-shrink: 0;
}
.value-content h3 { font-size: 1.1rem; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.value-content p { font-size: 0.88rem; color: rgba(255,255,255,0.6); line-height: 1.8; }

/* ===== Contact ===== */
.contact { padding: 100px 0; background: var(--light); }
.contact-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.contact-card {
  background: var(--white); border-radius: var(--radius);
  padding: 40px 32px; text-align: center;
  border: 2px solid rgba(226,232,240,0.8);
  transition: var(--transition);
}
.contact-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-lg); transform: translateY(-6px); }
.contact-icon { font-size: 2.4rem; margin-bottom: 16px; }
.contact-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
.contact-card p { font-size: 0.9rem; color: var(--mid); line-height: 1.8; }
.contact-card a { color: var(--primary); font-weight: 600; }
.contact-card a:hover { color: var(--primary-dark); }
.contact-sub { font-size: 0.8rem !important; color: rgba(100,116,139,0.7) !important; margin-top: 6px; }

/* ===== Footer ===== */
.footer { background: var(--dark); color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-top {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-logo {
  font-size: 1.6rem; font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 10px;
}
.footer-tagline { font-size: 0.85rem; color: rgba(255,255,255,0.4); }
.footer-links-group h4 {
  font-size: 0.9rem; font-weight: 700; color: var(--white);
  margin-bottom: 18px; letter-spacing: 1px;
}
.footer-links-group ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links-group li { font-size: 0.85rem; }
.footer-links-group a:hover { color: var(--primary-light); }
.footer-links-group span { color: rgba(255,255,255,0.45); font-size: 0.82rem; }
.footer-bottom {
  padding: 24px 0; display: flex; justify-content: space-between; align-items: center;
  font-size: 0.82rem; color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--primary-light); }

/* ===== Scroll Reveal ===== */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-visual { display: none; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0;
    background: rgba(15,23,42,0.97); padding: 24px; gap: 16px; backdrop-filter: blur(10px); }
  .nav-links.open { display: flex; }
  .nav-link { color: var(--white) !important; font-size: 1rem; }
  .nav-toggle { display: flex; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item { border-right: none; border-bottom: 1px solid #e2e8f0; }
  .stat-item:nth-child(odd) { border-right: 1px solid #e2e8f0; }
  .stat-item:nth-last-child(-n+2) { border-bottom: none; }
  .services-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .company-info-cards { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 220px; text-align: center; }
}