/* ============================================
   佛山市新智农供应链管理有限公司 - 官网样式
   ============================================ */

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

:root {
  /* Colors */
  --primary: #2D6A4F;
  --primary-dark: #1B4332;
  --primary-light: #40916C;
  --secondary: #D4A373;
  --secondary-light: #E9C46A;
  --accent: #E07A5F;
  --accent-hover: #C4613F;
  --bg: #FAFAF5;
  --bg-light: #F0F7F4;
  --bg-warm: #FFF8F0;
  --text: #1A1A1A;
  --text-secondary: #666666;
  --text-light: #999999;
  --white: #FFFFFF;
  --border: #E8E8E0;
  --shadow: rgba(0, 0, 0, 0.08);
  --shadow-md: rgba(0, 0, 0, 0.12);

  /* Spacing */
  --section-padding: 80px;
  --container-max: 1200px;

  /* Typography */
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;

  /* Transitions */
  --transition: 0.3s ease;
}

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

body {
  font-family: var(--font-family);
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

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

/* === Section Common === */
.section {
  padding: var(--section-padding) 0;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-header .subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.section-header .divider {
  width: 60px;
  height: 3px;
  background: var(--primary);
  margin: 16px auto 0;
  border-radius: 2px;
}

/* === Navigation === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: box-shadow var(--transition), background var(--transition);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  box-shadow: 0 2px 20px var(--shadow);
  border-bottom-color: var(--border);
}

.navbar-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
}

.navbar-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 20px;
  font-weight: 700;
  flex-shrink: 0;
}

.navbar-logo .logo-text {
  line-height: 1.3;
}

.navbar-logo .logo-text small {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar-menu a {
  padding: 8px 18px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: all var(--transition);
  white-space: nowrap;
}

.navbar-menu a:hover,
.navbar-menu a.active {
  color: var(--primary);
  background: var(--bg-light);
}

.navbar-cta {
  margin-left: 16px;
}

.navbar-cta a {
  padding: 10px 24px !important;
  background: var(--primary) !important;
  color: var(--white) !important;
  border-radius: 8px !important;
  font-weight: 600 !important;
}

.navbar-cta a:hover {
  background: var(--primary-dark) !important;
  transform: translateY(-1px);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* === Hero Section === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(212, 163, 115, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
}

.hero-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.06;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(255,255,255,0.5) 40px, rgba(255,255,255,0.5) 41px),
    repeating-linear-gradient(90deg, transparent, transparent 40px, rgba(255,255,255,0.5) 40px, rgba(255,255,255,0.5) 41px);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--white);
  max-width: 800px;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: 32px;
  backdrop-filter: blur(8px);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--secondary-light);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}

.hero h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  color: var(--secondary-light);
}

.hero-desc {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  opacity: 0.9;
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: var(--font-family);
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(224, 122, 95, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-stat {
  text-align: center;
}

.hero-stat .number {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--secondary-light);
  line-height: 1.2;
}

.hero-stat .label {
  font-size: var(--font-size-sm);
  opacity: 0.8;
  margin-top: 4px;
}

/* === About Section === */
.about {
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--bg-light);
}

.about-image .placeholder-img {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: var(--font-size-sm);
  gap: 8px;
  border: 2px dashed var(--border);
  border-radius: 16px;
}

.about-image .placeholder-img .icon {
  font-size: 48px;
  opacity: 0.4;
}

.about-text h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}

.about-text p {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.9;
}

.about-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.about-info-item {
  padding: 16px;
  background: var(--bg-light);
  border-radius: 12px;
}

.about-info-item .label {
  font-size: var(--font-size-xs);
  color: var(--text-light);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.about-info-item .value {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text);
}

/* === Business Scope === */
.scope {
  background: var(--bg-light);
}

.scope-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scope-card {
  background: var(--white);
  border-radius: 16px;
  padding: 32px 28px;
  transition: all var(--transition);
  border: 1px solid var(--border);
}

.scope-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px var(--shadow);
  border-color: var(--primary-light);
}

.scope-card .icon {
  width: 56px;
  height: 56px;
  background: var(--bg-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
  transition: all var(--transition);
}

.scope-card:hover .icon {
  background: var(--primary);
  transform: scale(1.05);
}

.scope-card:hover .icon span {
  filter: brightness(0) invert(1);
}

.scope-card h4 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.scope-card p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === Products Section === */
.products {
  background: var(--white);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--bg);
  border-radius: 16px;
  overflow: hidden;
  transition: all var(--transition);
  border: 1px solid var(--border);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px var(--shadow);
}

.product-image {
  aspect-ratio: 4/3;
  background: var(--bg-warm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: var(--font-size-sm);
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.product-image .icon {
  font-size: 48px;
  opacity: 0.3;
}

.product-image .img-label {
  font-size: var(--font-size-xs);
  opacity: 0.6;
  background: rgba(0,0,0,0.05);
  padding: 4px 12px;
  border-radius: 20px;
}

.product-info {
  padding: 24px;
}

.product-info h4 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.product-info p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.product-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-light);
  color: var(--primary);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: 20px;
  margin-top: 12px;
}

/* === Advantages Section === */
.advantages {
  background: var(--primary-dark);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.advantages::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(212, 163, 115, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.advantages .section-header h2 {
  color: var(--white);
}

.advantages .section-header .subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.advantages .section-header .divider {
  background: var(--secondary);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  z-index: 1;
}

.advantage-card {
  text-align: center;
  padding: 40px 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  transition: all var(--transition);
  backdrop-filter: blur(8px);
}

.advantage-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.advantage-card .icon {
  width: 64px;
  height: 64px;
  background: rgba(212, 163, 115, 0.2);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin: 0 auto 20px;
}

.advantage-card h4 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 12px;
}

.advantage-card p {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
}

/* === Contact Section === */
.contact {
  background: var(--bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-item .icon {
  width: 48px;
  height: 48px;
  background: var(--bg-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.contact-item .content h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text);
}

.contact-item .content p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.contact-map {
  border-radius: 16px;
  overflow: hidden;
  background: var(--bg-light);
  border: 1px solid var(--border);
  aspect-ratio: 4/3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: var(--font-size-sm);
  gap: 8px;
}

.contact-map iframe {
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 16px;
}

.contact-map .icon {
  font-size: 48px;
  opacity: 0.3;
}

.contact-map .map-label {
  font-size: var(--font-size-xs);
  opacity: 0.6;
  background: rgba(0,0,0,0.05);
  padding: 4px 12px;
  border-radius: 20px;
}

/* === Footer === */
.footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.footer-brand .logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--primary-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col h5 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: var(--secondary-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.4);
}

/* === Scroll Animations === */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Mobile Menu Overlay === */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.mobile-menu.active {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu a {
  padding: 16px 32px;
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text);
  border-radius: 12px;
  transition: all var(--transition);
}

.mobile-menu a:hover {
  background: var(--bg-light);
  color: var(--primary);
}

/* === Back to Top === */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 100;
  box-shadow: 0 4px 16px rgba(45, 106, 79, 0.3);
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* === Responsive: Tablet === */
@media (max-width: 1024px) {
  :root {
    --section-padding: 64px;
  }

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

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

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

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

/* === Responsive: Mobile === */
@media (max-width: 768px) {
  :root {
    --section-padding: 48px;
    --font-size-4xl: 1.8rem;
    --font-size-3xl: 1.5rem;
  }

  .navbar-menu,
  .navbar-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-menu {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .hero-stat .number {
    font-size: var(--font-size-2xl);
  }

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

  .about-image {
    order: -1;
  }

  .about-info {
    grid-template-columns: 1fr;
  }

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

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

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

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

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

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}