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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB',
               'Microsoft YaHei', sans-serif;
  color: #1a1a2e;
  background: #fff;
  line-height: 1.7;
  font-size: 15px;
}

a { text-decoration: none; color: inherit; }

img { display: block; max-width: 100%; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e5e7eb;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 32px;
}

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

.nav-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 6px;
}

.nav-name {
  font-size: 17px;
  font-weight: 700;
  color: #c0392b;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  margin-right: 16px;
}

.nav-links a {
  font-size: 14px;
  color: #374151;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover { color: #c0392b; }

.nav-login {
  margin-left: auto;
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  color: #c0392b;
  border: 1.5px solid #c0392b;
  padding: 6px 16px;
  border-radius: 20px;
  transition: background 0.2s, color 0.2s;
}

.nav-login:hover {
  background: #c0392b;
  color: #fff;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  margin-left: auto;
  color: #374151;
  padding: 4px 8px;
}

.nav-mobile {
  display: none;
  flex-direction: column;
  border-top: 1px solid #e5e7eb;
  background: #fff;
}

.nav-mobile.open { display: flex; }

.nav-mobile a {
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 500;
  color: #374151;
  border-bottom: 1px solid #f3f4f6;
  transition: background 0.15s;
}

.nav-mobile a:hover { background: #fef2f2; color: #c0392b; }

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, #c0392b 0%, #96281b 60%, #7b241c 100%);
  color: #fff;
  padding: 96px 24px 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 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='0.04'%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");
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  color: #ffe4e1;
  font-size: 13px;
  padding: 5px 16px;
  border-radius: 20px;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 800;
  letter-spacing: 0.03em;
  line-height: 1.2;
  margin-bottom: 18px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.hero-sub {
  font-size: 16px;
  color: rgba(255,255,255,0.85);
  max-width: 540px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.hero-btn {
  display: inline-block;
  background: #fff;
  color: #c0392b;
  font-size: 15px;
  font-weight: 700;
  padding: 13px 36px;
  border-radius: 30px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.hero-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}


/* ── Stats ── */
.stats {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.stat-item {
  padding: 36px 20px;
  text-align: center;
  border-right: 1px solid #e5e7eb;
}

.stat-item:last-child { border-right: none; }

.stat-num {
  font-size: 38px;
  font-weight: 800;
  color: #c0392b;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-unit {
  font-size: 18px;
  font-weight: 600;
}

.stat-label {
  font-size: 13px;
  color: #6b7280;
  letter-spacing: 0.05em;
}

/* ── Section ── */
.section {
  padding: 80px 0;
}

.section-alt {
  background: #f9fafb;
}

.section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #c0392b;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  color: #111827;
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 15px;
  color: #6b7280;
  margin-bottom: 40px;
  max-width: 600px;
}

/* ── About ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  margin-top: 32px;
}

.about-text p {
  color: #374151;
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 16px;
}

.about-text p:last-child { margin-bottom: 0; }

.about-facts {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.fact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 16px 20px;
}

.fact-icon {
  font-size: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}

.fact-title {
  font-size: 12px;
  color: #9ca3af;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.fact-value {
  font-size: 14px;
  color: #111827;
  font-weight: 600;
}

/* ── Network ── */
.network-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 32px;
  margin-bottom: 32px;
}

.network-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 32px 20px;
  text-align: center;
  transition: box-shadow 0.2s, transform 0.2s;
}

.network-card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.network-icon { font-size: 32px; margin-bottom: 12px; }

.network-num {
  font-size: 36px;
  font-weight: 800;
  color: #c0392b;
  line-height: 1;
  margin-bottom: 8px;
}

.network-type {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.5;
}

.region-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.region-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 20px;
  padding: 7px 16px;
  font-size: 14px;
  color: #374151;
  font-weight: 500;
}

.region-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #c0392b;
  flex-shrink: 0;
}

/* ── Logistics ── */
.logistics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.logistics-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 32px 28px;
  transition: box-shadow 0.2s;
}

.logistics-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.08); }

.logistics-icon { font-size: 32px; margin-bottom: 14px; }

.logistics-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: #111827;
  margin-bottom: 10px;
}

.logistics-card p {
  font-size: 14px;
  color: #6b7280;
  line-height: 1.7;
}

/* ── Culture ── */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
  margin-bottom: 32px;
}

.culture-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.culture-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.08); }

.culture-num {
  font-size: 48px;
  font-weight: 900;
  color: #fee2e2;
  line-height: 1;
  margin-bottom: 12px;
}

.culture-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #111827;
  margin-bottom: 10px;
}

.culture-card p {
  font-size: 14px;
  color: #6b7280;
  line-height: 1.7;
}

.promise-box {
  background: linear-gradient(135deg, #c0392b, #96281b);
  border-radius: 16px;
  padding: 32px 36px;
  color: #fff;
}

.promise-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
}

.promise-items {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.promise-item {
  font-size: 15px;
  font-weight: 600;
  opacity: 0.95;
}

/* ── CSR ── */
.csr-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.csr-item {
  text-align: center;
  padding: 40px 20px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
}

.csr-icon { font-size: 36px; margin-bottom: 16px; }

.csr-num {
  font-size: 32px;
  font-weight: 800;
  color: #c0392b;
  line-height: 1.2;
  margin-bottom: 8px;
}

.csr-num span {
  font-size: 16px;
  font-weight: 600;
}

.csr-desc {
  font-size: 13px;
  color: #6b7280;
}

/* ── Honors ── */
.honors-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.honor-item {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 18px 22px;
  font-size: 14px;
  color: #374151;
  font-weight: 500;
  line-height: 1.5;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.honor-item:hover {
  border-color: #c0392b;
  box-shadow: 0 4px 12px rgba(192,57,43,0.08);
}

/* ── Contact ── */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.contact-item {
  text-align: center;
  padding: 36px 24px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
}

.contact-icon { font-size: 32px; margin-bottom: 12px; }

.contact-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #9ca3af;
  margin-bottom: 8px;
}

.contact-value {
  font-size: 14px;
  color: #111827;
  font-weight: 600;
  line-height: 1.6;
}

/* ── Footer ── */
.footer {
  background: #111827;
  color: #9ca3af;
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 6px;
  opacity: 0.85;
}

.footer-name {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.footer-sub {
  font-size: 12px;
  color: #6b7280;
  margin-top: 2px;
}

.footer-copy {
  font-size: 13px;
  color: #6b7280;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { border-top: 1px solid #e5e7eb; }

  .about-grid { grid-template-columns: 1fr; gap: 32px; }

  .network-grid { grid-template-columns: repeat(2, 1fr); }

  .logistics-grid { grid-template-columns: 1fr; }

  .culture-grid { grid-template-columns: 1fr; }

  .csr-grid { grid-template-columns: 1fr; }

  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }

  .hero { padding: 64px 24px 56px; }

  .section { padding: 56px 0; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .stat-num { font-size: 30px; }

  .network-grid { grid-template-columns: repeat(2, 1fr); }

  .honors-grid { grid-template-columns: 1fr; }

  .promise-items { gap: 16px; }

  .footer-inner { flex-direction: column; align-items: flex-start; }

  .footer-copy { font-size: 12px; }
}