:root {
  --brand: #e60012;
  --brand-dark: #b3000e;
  --brand-soft: #fff2f3;
  --text: #222;
  --text-mute: #666;
  --text-light: #999;
  --bg: #ffffff;
  --bg-alt: #f7f8fa;
  --border: #eee;
  --radius: 6px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
  --container: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'PingFang SC', -apple-system, 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ Header ============ */
.site-header {
  background: #fff;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-mark {
  width: 46px;
  height: 46px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.logo-name {
  font-size: 22px;
  font-weight: 700;
  color: #1a1a1a;
  letter-spacing: 1px;
}

.logo-en {
  font-size: 10px;
  color: var(--text-light);
  letter-spacing: 2px;
  margin-top: 2px;
}

.main-nav {
  display: flex;
  gap: 34px;
  flex: 1;
  justify-content: center;
}

.main-nav a {
  color: #333;
  font-size: 15px;
  position: relative;
  padding: 30px 0;
  transition: color 0.2s;
  font-weight: 500;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--brand);
  transition: width 0.25s ease;
}

.main-nav a:hover {
  color: var(--brand);
}

.main-nav a:hover::after {
  width: 100%;
}

.header-phone {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.phone-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: var(--brand-soft);
  color: var(--brand);
  border-radius: 50%;
  font-size: 18px;
}

.phone-label {
  font-size: 12px;
  color: var(--text-light);
}

.phone-num {
  font-size: 20px;
  color: var(--brand);
  font-weight: 700;
  font-family: 'Arial', sans-serif;
  letter-spacing: 0.5px;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 520px;
  background: linear-gradient(135deg, #ffffff 0%, #fff5f6 55%, #ffe3e6 100%);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-bg::before,
.hero-bg::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
}

.hero-bg::before {
  width: 720px;
  height: 720px;
  background: radial-gradient(circle, rgba(230, 0, 18, 0.18), transparent 65%);
  top: -260px;
  right: -180px;
}

.hero-bg::after {
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(230, 0, 18, 0.10), transparent 70%);
  bottom: -160px;
  left: -120px;
}

.hero-inner {
  min-height: 520px;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 1;
  padding: 60px 24px;
}

.hero-content { max-width: 780px; }

.hero-tag {
  display: inline-block;
  background: rgba(230, 0, 18, 0.08);
  color: var(--brand);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
  letter-spacing: 2px;
}

.hero-content h1 {
  font-size: 48px;
  font-weight: 700;
  color: #1a1a1a;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.hero-content h1 .accent {
  color: var(--brand);
}

.hero-desc {
  font-size: 17px;
  color: var(--text-mute);
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn {
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
  display: inline-block;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 20px rgba(230, 0, 18, 0.28);
}

.btn-primary:hover {
  background: var(--brand-dark);
  box-shadow: 0 12px 28px rgba(230, 0, 18, 0.4);
}

.btn-ghost {
  border-color: var(--brand);
  color: var(--brand);
  background: #fff;
}

.btn-ghost:hover {
  background: var(--brand);
  color: #fff;
}

.hero-stats {
  display: flex;
  gap: 60px;
  padding-top: 32px;
  border-top: 1px solid rgba(230, 0, 18, 0.15);
}

.stat-num {
  font-size: 40px;
  font-weight: 700;
  color: var(--brand);
  line-height: 1;
  font-family: 'Arial', sans-serif;
}

.stat-num span {
  font-size: 24px;
  margin-left: 2px;
}

.stat-lbl {
  font-size: 14px;
  color: var(--text-mute);
  margin-top: 8px;
}

/* ============ Sections ============ */
.section {
  padding: 70px 0;
  background: var(--bg);
}

.section-alt {
  background: var(--bg-alt);
}

.section-figure {
  max-width: 1100px;
  margin: 0 auto;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.section-figure:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.section-figure img {
  width: 100%;
  height: auto;
  display: block;
}

.clients-section { padding: 60px 0; }

.clients-section .section-figure {
  background: #fff;
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

/* ============ CTA Banner ============ */
.cta-section {
  background: #222;
}

.cta-banner {
  display: block;
  transition: opacity 0.2s;
}

.cta-banner:hover { opacity: 0.94; }

.cta-banner img {
  width: 100%;
  height: auto;
  display: block;
}

/* ============ Footer ============ */
.site-footer {
  background: #1a1a1a;
  color: #b8b8b8;
  padding-top: 60px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo { margin-bottom: 20px; }
.footer-brand .logo-name { color: #fff; }
.footer-brand .logo-en { color: #777; }

.brand-desc {
  font-size: 14px;
  color: #888;
  line-height: 1.9;
}

.site-footer h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 20px;
  font-weight: 600;
  position: relative;
  padding-bottom: 12px;
}

.site-footer h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background: var(--brand);
}

.footer-col ul li {
  padding: 6px 0;
  font-size: 14px;
}

.footer-col ul a {
  color: #999;
  transition: color 0.2s;
}

.footer-col ul a:hover { color: var(--brand); }

.contact-line {
  font-size: 14px;
  color: #999;
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.contact-line span {
  color: var(--brand);
  font-size: 15px;
}

.copyright {
  border-top: 1px solid #2a2a2a;
  padding: 20px 0;
}

.copyright-inner {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: #666;
}

.beian-link {
  color: #888;
  transition: color 0.2s;
}

.beian-link:hover {
  color: var(--brand);
  text-decoration: underline;
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .main-nav { gap: 22px; }
  .main-nav a { font-size: 14px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .header-inner { height: 68px; gap: 12px; }
  .main-nav { display: none; }
  .header-phone .phone-label { display: none; }
  .phone-num { font-size: 16px; }
  .logo-mark { width: 40px; height: 40px; }
  .logo-name { font-size: 18px; }
  .logo-en { font-size: 9px; }

  .hero { min-height: 420px; }
  .hero-inner { min-height: 420px; padding: 40px 20px; }
  .hero-content h1 { font-size: 30px; }
  .hero-desc { font-size: 15px; }
  .hero-stats { gap: 24px; flex-wrap: wrap; padding-top: 20px; }
  .stat-num { font-size: 28px; }

  .section { padding: 40px 0; }
  .section-figure { border-radius: 4px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; padding-bottom: 32px; }
  .copyright-inner { flex-direction: column; gap: 8px; text-align: center; }
}