:root {
  --brand: #ea580c;
  --brand-dark: #c2410c;
  --ink: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #f8fafc;
  --panel: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.75;
}

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

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

.container {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(10px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #fb923c, #c2410c);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.brand-logo::before,
.brand-logo::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 2px solid rgba(255, 255, 255, 0.85);
}

.brand-logo::after {
  inset: 16px 6px;
}

.brand-title {
  font-weight: 800;
  font-size: 1.1rem;
}

.brand-subtitle,
.header-hotline,
.muted,
.card-meta,
.crumbs,
.footer-note {
  color: var(--muted);
}

.header-hotline {
  font-size: 0.92rem;
}

.desktop-nav,
.footer-links,
.chip-row,
.button-row,
.meta-row,
.quick-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.desktop-nav a,
.mobile-nav a {
  font-weight: 600;
  color: #374151;
}

.desktop-nav a.active,
.desktop-nav a:hover,
.mobile-nav a.active,
.mobile-nav a:hover {
  color: var(--brand);
}

.mobile-toggle {
  display: none;
  border: 0;
  background: transparent;
  padding: 6px;
  cursor: pointer;
}

.mobile-nav {
  display: none;
  padding: 0 16px 16px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.mobile-nav.open {
  display: grid;
  gap: 10px;
}

.mobile-nav a {
  padding: 10px 0;
}

.hero {
  position: relative;
  min-height: 560px;
  color: #fff;
  overflow: hidden;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.hero-slide.active {
  opacity: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(17, 24, 39, 0.72), rgba(17, 24, 39, 0.3));
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  align-items: center;
  min-height: 560px;
}

.hero-copy {
  max-width: 760px;
  padding: 60px 0;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 16px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.9rem;
}

h1,
h2,
h3 {
  margin: 0 0 14px;
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.4rem, 4vw, 4.5rem);
}

h2 {
  font-size: clamp(1.8rem, 2.5vw, 2.8rem);
}

h3 {
  font-size: 1.25rem;
}

p {
  margin: 0 0 16px;
}

.lead {
  font-size: 1.15rem;
  max-width: 54ch;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  font-weight: 700;
  transition: 0.2s ease;
}

.button {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 24px rgba(234, 88, 12, 0.24);
}

.button:hover {
  background: var(--brand-dark);
}

.button-secondary {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.8);
}

.button-secondary.dark {
  color: var(--ink);
  border-color: var(--line);
  background: #fff;
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.hero-indicators {
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  gap: 10px;
}

.hero-indicators button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 0;
  background: rgba(255, 255, 255, 0.45);
  cursor: pointer;
}

.hero-indicators button.active {
  background: #fff;
}

section {
  padding: 68px 0;
}

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

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.section-head p {
  max-width: 60ch;
}

.stats-grid,
.card-grid,
.article-grid,
.contact-grid,
.listing-grid,
.news-grid,
.product-grid {
  display: grid;
  gap: 24px;
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: -48px;
  position: relative;
  z-index: 2;
}

.stat-card,
.info-card,
.article-card,
.contact-card,
.news-card,
.sidebar-card {
  background: var(--panel);
  border-radius: 20px;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.08);
  overflow: hidden;
}

.stat-card,
.info-card,
.contact-card,
.sidebar-card {
  padding: 26px;
}

.stat-card strong {
  display: block;
  font-size: 1.8rem;
  color: var(--brand);
}

.card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.product-grid,
.news-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.listing-grid {
  grid-template-columns: 280px minmax(0, 1fr);
  align-items: start;
}

.article-grid {
  grid-template-columns: minmax(0, 1.1fr) 340px;
}

.contact-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.product-thumb,
.article-thumb,
.news-thumb {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.article-card-content,
.news-card-content {
  padding: 22px;
}

.chip {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: #fff7ed;
  color: var(--brand);
  font-weight: 700;
  font-size: 0.85rem;
}

.feature-list,
.sidebar-list,
.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.feature-list li,
.sidebar-list li,
.contact-list li {
  padding-left: 18px;
  position: relative;
  margin-bottom: 10px;
}

.feature-list li::before,
.sidebar-list li::before,
.contact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand);
}

.crumbs-wrap {
  background: #f3f4f6;
  padding: 14px 0;
}

.crumbs {
  font-size: 0.95rem;
}

.page-hero {
  padding: 64px 0 48px;
  background: linear-gradient(135deg, #f97316, #ea580c);
  color: #fff;
}

.page-hero.compact {
  padding: 54px 0 40px;
}

.page-title-box {
  max-width: 900px;
}

.sidebar-nav a {
  display: block;
  padding: 14px 16px;
  border-radius: 14px;
  color: #374151;
  font-weight: 600;
}

.sidebar-nav a.active,
.sidebar-nav a:hover {
  background: #fff7ed;
  color: var(--brand);
}

.site-footer {
  background: #111827;
  color: #fff;
  padding: 56px 0 28px;
}

.site-footer .grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.site-footer a {
  color: #cbd5e1;
}

.site-footer a:hover {
  color: #fff;
}

.footer-bottom {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: #94a3b8;
}

@media (max-width: 1024px) {
  .stats-grid,
  .card-grid,
  .product-grid,
  .news-grid,
  .contact-grid,
  .article-grid,
  .listing-grid,
  .site-footer .grid {
    grid-template-columns: 1fr;
  }

  .section-head {
    flex-direction: column;
    align-items: start;
  }
}

@media (max-width: 768px) {
  .desktop-nav,
  .header-hotline {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .hero,
  .hero-inner {
    min-height: 500px;
  }

  .container {
    width: min(calc(100% - 24px), 1200px);
  }

  section {
    padding: 52px 0;
  }
}