/* ============================================
   百路通物流官网 - 全局样式表
   BLT Logistics Official Website
   ============================================ */

/* ---------- Design Tokens (CSS Variables) ---------- */
:root {
  /* Brand Colors */
  --color-primary: #0B5CAD;
  --color-primary-dark: #084A8F;
  --color-primary-light: #1A7ACC;
  --color-accent: #FF6B35;
  --color-accent-hover: #E55A28;

  /* Neutrals */
  --color-white: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F7F8FA;
  --color-bg-dark: #0D1B2A;
  --color-text: #333333;
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-border: #E5E7EB;
  --color-border-light: #F0F0F0;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 2rem;      /* 32px */
  --font-size-4xl: 2.5rem;    /* 40px */
  --font-size-5xl: 3rem;      /* 48px */

  /* Spacing */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4rem;     /* 64px */
  --space-4xl: 6rem;     /* 96px */

  /* Layout */
  --container-max: 1200px;
  --container-padding: 1.25rem;

  /* Border & Shadow */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-card: 0 2px 16px rgba(0,0,0,0.06);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Header */
  --header-height: 72px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  color: var(--color-text);
  font-weight: 600;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

/* ---------- Utility Classes ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-4xl) 0;
}

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

.section-dark {
  background-color: var(--color-bg-dark);
  color: var(--color-white);
}
.section-dark p,
.section-dark .text-secondary {
  color: rgba(255,255,255,0.75);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent); }
.text-primary { color: var(--color-primary); }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* Section Title */
.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header .section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  margin: var(--space-md) auto 0;
  border-radius: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  font-size: var(--font-size-base);
  font-weight: 500;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}
.btn-accent:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-outline-white {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}
.btn-outline-white:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: var(--font-size-lg);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--font-size-sm);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.header-logo img {
  height: 44px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-menu a {
  position: relative;
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-sm) 0;
  transition: color var(--transition-fast);
}
.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-primary);
}
.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}
.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--header-height);
  background-color: rgba(0,0,0,0.5);
  z-index: 1000;
  opacity: 0;
  transition: opacity var(--transition-base);
}
.mobile-nav-overlay.show {
  opacity: 1;
}

/* ============================================
   HERO / BANNER
   ============================================ */
.hero {
  position: relative;
  min-height: 600px;
  margin-top: var(--header-height);
  overflow: hidden;
  background-color: var(--color-bg-dark);
}

.hero-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  min-height: 600px;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.hero-slide.active {
  opacity: 1;
}
.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(13,27,42,0.85) 0%,
    rgba(11,92,173,0.55) 60%,
    rgba(11,92,173,0.3) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  min-height: 600px;
  padding-top: var(--space-3xl);
  color: var(--color-white);
}

.hero-content h1 {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.hero-content p {
  font-size: var(--font-size-xl);
  color: rgba(255,255,255,0.9);
  max-width: 550px;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
}

/* Banner Dots */
.hero-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 10px;
}
.hero-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  padding: 0;
}
.hero-dot.active {
  background: var(--color-white);
  width: 30px;
  border-radius: 5px;
}

/* ============================================
   ABOUT PREVIEW SECTION (Home)
   ============================================ */
.about-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}
.about-preview-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.about-preview-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.about-preview-image:hover img {
  transform: scale(1.03);
}
.about-preview-text h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-lg);
}
.about-preview-text p {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}
.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}
.about-stat-item {
  text-align: center;
}
.about-stat-number {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}
.about-stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ============================================
   SERVICES CARDS
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.service-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-align: left;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  position: relative;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition-base);
  z-index: 2;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 100%;
  height: 220px;
  margin: 0;
  display: block;
  overflow: hidden;
  flex-shrink: 0;
}
.service-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.service-card:hover .service-icon img {
  transform: scale(1.05);
}
.service-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}
.service-card > h3,
.service-card > p {
  padding: 0 var(--space-xl) var(--space-xl);
}
.service-card > h3 {
  padding-top: var(--space-lg);
}

/* ============================================
   ADVANTAGES / WHY CHOOSE US
   ============================================ */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.advantage-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
}
.advantage-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-lg);
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(11,92,173,0.08), rgba(255,107,53,0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  transition: all var(--transition-base);
}
.advantage-card:hover .advantage-icon {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  transform: scale(1.08);
}
.advantage-card:hover .advantage-icon svg,
.advantage-card:hover .advantage-icon span {
  filter: brightness(0) invert(1);
}
.advantage-card h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}
.advantage-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ============================================
   NEWS SECTION (Home Preview + List Page)
   ============================================ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.news-card {
  display: flex;
  gap: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  text-decoration: none;
  color: inherit;
}
.news-card:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
  transform: translateY(-2px);
  color: inherit;
}

.news-thumb {
  width: 200px;
  height: 140px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-bg-alt);
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}
.news-card:hover .news-thumb img {
  transform: scale(1.05);
}

.news-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.news-info h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-info .news-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}
.news-info .news-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}
.news-info .news-category {
  display: inline-block;
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  background: rgba(11,92,173,0.08);
  padding: 2px 10px;
  border-radius: 20px;
  margin-top: var(--space-sm);
  align-self: flex-start;
}

/* News List Page */
.news-list-page .news-card {
  flex-direction: row;
}
.news-list-page .news-thumb {
  width: 240px;
  height: 160px;
}

/* Category Filter Bar */
.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  margin-bottom: var(--space-2xl);
}
.category-btn {
  padding: 0.5rem 1.25rem;
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-white);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.category-btn:hover,
.category-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-2xl);
}
.pagination button,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.pagination button:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.pagination .page-num.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ============================================
   NEWS DETAIL PAGE
   ============================================ */
.article-detail {
  max-width: 850px;
  margin: 0 auto;
}
.article-detail .article-header {
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}
.article-detail .article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}
.article-detail .article-body {
  font-size: var(--font-size-lg);
  line-height: 1.9;
  color: var(--color-text);
}
.article-detail .article-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: var(--space-lg) 0;
}
.article-detail .article-body h2,
.article-detail .article-body h3 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}
.article-detail .article-body p {
  margin-bottom: var(--space-lg);
}

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-lg);
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}
.article-nav-link {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  max-width: 45%;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.article-nav-link:hover {
  color: var(--color-primary);
}
.article-nav-link strong {
  font-size: var(--font-size-base);
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  text-align: center;
  padding: var(--space-4xl) 0;
}
.cta-section h2 {
  color: var(--color-white);
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
}
.cta-section p {
  color: rgba(255,255,255,0.85);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2xl);
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   CONTACT PAGE
   ============================================ */

/* 4-column contact cards */
.contact-cards-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}
.contact-card-item {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  transition: all var(--transition-base);
}
.contact-card-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary-light);
}
.contact-card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-white);
  border-radius: 50%;
  font-size: 24px;
  box-shadow: 0 4px 12px rgba(11,92,173,0.25);
}
.contact-card-item h4 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}
.contact-card-item p {
  font-size: var(--font-size-sm);
  margin-bottom: 0;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* Map wrapper */
.map-wrapper {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.map-wrapper iframe {
  display: block;
}

/* Contact Form */
.contact-form-section {
  margin-top: var(--space-4xl);
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.form-group.full-width {
  grid-column: 1 / -1;
}
.form-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}
.form-input,
.form-textarea,
.form-select {
  padding: 0.75rem 1rem;
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
  outline: none;
  width: 100%;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(11,92,173,0.1);
}
.form-textarea {
  resize: vertical;
  min-height: 140px;
}
.form-input.error,
.form-textarea.error {
  border-color: #e74c3c;
}
.form-error-msg {
  font-size: var(--font-size-xs);
  color: #e74c3c;
  display: none;
}
.form-error-msg.show {
  display: block;
}

/* Form Success/Error Messages */
.form-message {
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  margin-top: var(--space-lg);
  display: none;
  text-align: center;
  font-size: var(--font-size-base);
}
.form-message.success {
  display: block;
  background: rgba(39,174,96,0.1);
  color: #27ae60;
  border: 1px solid rgba(39,174,96,0.2);
}
.form-message.error {
  display: block;
  background: rgba(231,76,60,0.1);
  color: #e74c3c;
  border: 1px solid rgba(231,76,60,0.2);
}

/* Honeypot field (hidden from users) */
.honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  overflow: hidden;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background-color: var(--color-bg-dark);
  color: rgba(255,255,255,0.7);
  padding: var(--space-3xl) 0 var(--space-lg);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}
.footer-brand img {
  height: 40px;
  margin-bottom: var(--space-md);
}
.footer-brand p {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h4 {
  color: var(--color-white);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-lg);
  font-weight: 600;
}
.footer-col ul li {
  margin-bottom: var(--space-sm);
}
.footer-col ul li a {
  color: rgba(255,255,255,0.6);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}
.footer-col ul li a:hover {
  color: var(--color-white);
}
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-sm);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
}

/* ============================================
   SERVICES DETAIL PAGE
   ============================================ */
.service-detail-section {
  padding: var(--space-4xl) 0;
}
.service-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}
.service-detail-content h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-lg);
}
.service-detail-content p {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}
.service-feature-list {
  list-style: none;
  padding: 0;
}
.service-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}
.service-feature-list li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: bold;
  flex-shrink: 0;
  margin-top: 2px;
}
.service-detail-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: calc(var(--header-height) + var(--space-lg));
}
.service-detail-image img {
  width: 100%;
  height: auto;
}

/* Service items on services page */
.service-block {
  padding: var(--space-3xl) 0;
  border-bottom: 1px solid var(--color-border-light);
}
.service-block:last-child {
  border-bottom: none;
}
.service-block-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}
.service-block:nth-child(even) .service-block-inner {
  direction: rtl;
}
.service-block:nth-child(even) .service-block-inner > * {
  direction: ltr;
}
.service-block-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.service-block-image img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.service-block-image:hover img {
  transform: scale(1.05);
}
.service-block-content h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}
.service-block-content p {
  font-size: var(--font-size-base);
  line-height: 1.8;
  color: var(--color-text-secondary);
}

/* ============================================
   ABOUT PAGE
   ============================================ */
.about-hero {
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  text-align: center;
  margin-top: var(--header-height);
}
.about-hero h1 {
  color: var(--color-white);
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-md);
}
.about-hero p {
  color: rgba(255,255,255,0.8);
  font-size: var(--font-size-lg);
  max-width: 650px;
  margin: 0 auto;
}

.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}
.about-intro-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.about-intro-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.about-intro-text h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-lg);
}
.about-intro-text p {
  font-size: var(--font-size-base);
  line-height: 1.9;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

/* Values/Culture */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}
.value-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}
.value-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.value-card .value-icon {
  font-size: 42px;
  margin-bottom: var(--space-md);
}
.value-card h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}
.value-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 750px;
  margin: 0 auto;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}
.timeline-item {
  position: relative;
  padding-bottom: var(--space-2xl);
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -25px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-primary);
}
.timeline-year {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}
.timeline-content {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================
   LOADING SKELETON
   ============================================ */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg-alt) 25%, #f0f0f0 50%, var(--color-bg-alt) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.skeleton-text {
  height: 16px;
  margin-bottom: var(--space-sm);
}
.skeleton-text.short {
  width: 60%;
}
.skeleton-img {
  height: 200px;
}

.loading-spinner {
  display: inline-block;
  width: 36px;
  height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-state {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-text-muted);
}

.empty-state {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-text-muted);
}
.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: var(--space-md);
}

/* ============================================
   PAGE HERO BANNER (Inner Pages)
   ============================================ */
.page-hero {
  margin-top: var(--header-height);
  background-color: var(--color-primary);
  background-size: cover;
  background-position: center;
  color: var(--color-white);
  padding: var(--space-3xl) 0;
  text-align: center;
  position: relative;
}
/* Gradient overlay for text readability when bg image is present */
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,92,173,0.82) 0%, rgba(8,74,143,0.75) 100%);
  z-index: 0;
}
.page-hero > .container {
  position: relative;
  z-index: 1;
}
.page-hero h1 {
  color: var(--color-white);
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-sm);
}
.page-hero p {
  color: rgba(255,255,255,0.8);
  font-size: var(--font-size-lg);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.7);
  justify-content: center;
  margin-top: var(--space-md);
}
.breadcrumb a {
  color: rgba(255,255,255,0.85);
}
.breadcrumb a:hover {
  color: var(--color-white);
}
.breadcrumb .separator {
  color: rgba(255,255,255,0.4);
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* Stagger children animation delays */
.stagger-children > *:nth-child(1) { animation-delay: 0.05s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.15s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.25s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.3s; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet & Below */
@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --header-height: 64px;
  }

  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-6 { grid-template-columns: repeat(3, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
  .values-grid { grid-template-columns: repeat(2, 1fr); }

  .about-preview {
    gap: var(--space-2xl);
  }
  .about-preview-image img {
    height: 320px;
  }

  .hero {
    min-height: 480px;
  }
  .hero-slider,
  .hero-content {
    min-height: 480px;
  }
  .hero-content h1 {
    font-size: var(--font-size-4xl);
  }

  .service-detail-grid,
  .about-intro,
  .contact-cards-row,
  .service-block-inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  .contact-cards-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .service-block:nth-child(even) .service-block-inner {
    direction: ltr;
  }
  .service-detail-image {
    position: static;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
    --container-padding: 1rem;
    --header-height: 56px;
  }

  /* 确保移动端 header 不裁剪下拉菜单 */
  .header {
    overflow: visible !important;
  }
  .header .container {
    overflow: visible !important;
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  /* Mobile Navigation */
  .menu-toggle {
    display: flex;
  }
  .nav-menu {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-xl);
    gap: 0;
    z-index: 1001;
    overflow-y: auto;
    /* 脱离父容器约束 */
    max-height: none;
    height: auto;
    transform: none;
  }
  .nav-menu.open {
    display: flex !important;
  }
  .nav-menu a {
    display: block;
    padding: var(--space-md) 0;
    font-size: var(--font-size-lg);
    border-bottom: 1px solid var(--color-border-light);
    text-align: center;
    color: var(--color-text);
    visibility: visible;
    opacity: 1;
  }
  .nav-menu a::after {
    display: none;
  }
  .mobile-nav-overlay {
    display: block;
  }
  .mobile-nav-overlay.show {
    display: block !important;
    opacity: 1 !important;
  }

  /* Mobile Grid */
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-6 {
    grid-template-columns: 1fr;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .service-icon {
    height: 180px;
  }
  .advantages-grid {
    grid-template-columns: 1fr 1fr;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .values-grid {
    grid-template-columns: 1fr 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-group.full-width {
    grid-column: 1;
  }

  /* Mobile About Preview */
  .about-preview {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Mobile Hero */
  .hero {
    min-height: 420px;
  }
  .hero-slider,
  .hero-content {
    min-height: 420px;
  }
  .hero-content h1 {
    font-size: var(--font-size-3xl);
  }
  .hero-content p {
    font-size: var(--font-size-base);
  }
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  /* Mobile News Card */
  .news-card {
    flex-direction: column;
  }
  .news-thumb {
    width: 100%;
    height: 180px;
  }
  .news-list-page .news-thumb {
    width: 100%;
    height: 200px;
  }

  /* Mobile Article Detail */
  .article-nav {
    flex-direction: column;
  }
  .article-nav-link {
    max-width: 100%;
  }

  /* Mobile CTA */
  .cta-section {
    padding: var(--space-2xl) 0;
  }
  .cta-section h2 {
    font-size: var(--font-size-2xl);
  }

  /* Mobile Contact */
  .contact-cards-row {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .map-wrapper iframe {
    height: 300px;
  }

  /* Mobile Service Block */
  .service-block-inner {
    grid-template-columns: 1fr;
  }
  .service-block:nth-child(even) .service-block-inner {
    direction: ltr;
  }
  .service-block-image img {
    height: 220px;
  }

  /* Mobile About Intro */
  .about-intro {
    grid-template-columns: 1fr;
  }
  .about-intro-image img {
    height: 280px;
  }

  /* Mobile Page Hero */
  .page-hero {
    padding: var(--space-2xl) 0;
  }
  .page-hero h1 {
    font-size: var(--font-size-2xl);
  }

  /* Mobile Footer */
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  :root {
    --font-size-5xl: 1.75rem;
    --font-size-4xl: 1.5rem;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
  }
  .values-grid {
    grid-template-columns: 1fr;
  }
  .about-stats {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .category-filter {
    gap: var(--space-xs);
  }
  .category-btn {
    font-size: var(--font-size-xs);
    padding: 0.35rem 0.85rem;
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .hero-dots,
  .menu-toggle,
  .cta-section {
    display: none !important;
  }
  body {
    color: #000;
    background: #fff;
  }
  .hero {
    margin-top: 0;
    min-height: auto;
  }
  .section {
    padding: 1rem 0;
  }
}