/* ==========================================================================
   Xinjiang Shengshi Jinfeng Seed Industry Co., Ltd.
   Official Multi-language Design System
   ========================================================================== */

:root {
  --primary-color: #105b38;
  --primary-dark: #0a3a24;
  --primary-light: #1b8a55;
  --accent-gold: #d99b26;
  --accent-gold-light: #f5b83d;
  --accent-gold-dark: #ad7815;
  --bg-light: #f8faf8;
  --bg-subtle: #f0f5f2;
  --card-bg: #ffffff;
  --text-dark: #15221b;
  --text-body: #324339;
  --text-muted: #5e7368;
  --border-color: #dde8e1;
  --border-focus: #105b38;
  
  --shadow-sm: 0 2px 8px rgba(16, 91, 56, 0.06);
  --shadow-md: 0 8px 24px rgba(16, 91, 56, 0.08);
  --shadow-lg: 0 16px 36px rgba(16, 91, 56, 0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  color: var(--text-body);
  background-color: var(--bg-light);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

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

.brand-logo img {
  height: 48px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-dark);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary-color);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

/* Language Switcher */
.lang-switcher {
  position: relative;
  margin-left: 16px;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--primary-color);
  cursor: pointer;
  transition: var(--transition);
}

.lang-btn:hover {
  background-color: #e5eee8;
  border-color: var(--primary-light);
}

.lang-menu {
  position: absolute;
  top: 110%;
  right: 0;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  min-width: 150px;
  display: none;
  flex-direction: column;
  overflow: hidden;
  z-index: 1010;
}

.lang-menu.show {
  display: flex;
}

.lang-item {
  padding: 10px 16px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition);
}

.lang-item:hover, .lang-item.active {
  background-color: var(--bg-subtle);
  color: var(--primary-color);
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-dark);
  cursor: pointer;
  padding: 8px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  position: relative;
  background: linear-gradient(135deg, #0a3a24 0%, #105b38 60%, #1c7247 100%);
  color: #ffffff;
  padding: 80px 0 100px;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background-image: radial-gradient(circle at 80% 20%, rgba(217, 155, 38, 0.18) 0%, transparent 60%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(217, 155, 38, 0.2);
  color: var(--accent-gold-light);
  border: 1px solid rgba(217, 155, 38, 0.4);
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #ffffff;
}

.hero-title span {
  color: var(--accent-gold-light);
}

.hero-lead {
  font-size: 1.15rem;
  line-height: 1.7;
  color: #d8e5df;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background-color: var(--accent-gold);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-gold-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(217, 155, 38, 0.4);
}

.btn-outline-white {
  background-color: transparent;
  color: #ffffff;
  border: 2px solid rgba(255, 255, 255, 0.8);
}

.btn-outline-white:hover {
  background-color: #ffffff;
  color: var(--primary-color);
  transform: translateY(-2px);
}

.btn-outline-primary {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline-primary:hover {
  background-color: var(--primary-color);
  color: #ffffff;
}

.hero-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.15);
}

.hero-card h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  color: var(--accent-gold-light);
}

.hero-card ul {
  list-style: none;
}

.hero-card li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
}

.hero-card li:last-child {
  border-bottom: none;
}

/* ==========================================================================
   Metrics Bar
   ========================================================================== */
.metrics-section {
  margin-top: -40px;
  position: relative;
  z-index: 10;
  margin-bottom: 60px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background-color: #ffffff;
  padding: 30px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

.metric-item {
  text-align: center;
  padding: 10px;
}

.metric-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1.1;
  margin-bottom: 6px;
}

.metric-unit {
  font-size: 1rem;
  color: var(--accent-gold);
}

.metric-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 600;
}

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

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

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  color: var(--accent-gold-dark);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Cards & Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
}

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

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #cadad0;
}

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background-color: var(--bg-subtle);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.card-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Product Cards */
.product-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.product-media {
  position: relative;
  background-color: #f1f7f3;
  padding: 24px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.product-media img {
  height: 180px;
  margin: 0 auto;
  object-fit: contain;
}

.product-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background-color: var(--primary-color);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
}

.product-tag.exclusive {
  background-color: var(--accent-gold-dark);
}

.product-body {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.product-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.product-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  flex-grow: 1;
}

.product-specs {
  list-style: none;
  font-size: 0.85rem;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
  margin-bottom: 16px;
}

.product-specs li {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  color: var(--text-dark);
}

.product-specs span {
  color: var(--text-muted);
}

/* ==========================================================================
   Certificates Gallery & Modal
   ========================================================================== */
.cert-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-gold);
}

.cert-thumb {
  height: 220px;
  background-color: #f7f9f8;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
}

.cert-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 10px;
  transition: transform 0.3s ease;
}

.cert-card:hover .cert-thumb img {
  transform: scale(1.04);
}

.cert-zoom-hint {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(16, 91, 56, 0.85);
  color: #ffffff;
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: 4px;
}

.cert-body {
  padding: 18px;
}

.cert-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  background-color: var(--bg-subtle);
  color: var(--primary-color);
  border-radius: 4px;
  margin-bottom: 8px;
}

.cert-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.4;
  margin-bottom: 6px;
}

.cert-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Lightbox Modal */
.modal {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(10, 20, 15, 0.88);
  backdrop-filter: blur(6px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.show {
  display: flex;
}

.modal-content {
  position: relative;
  max-width: 900px;
  width: 100%;
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
  animation: modalIn 0.25s ease-out;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-subtle);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-dark);
}

.modal-body {
  padding: 20px;
  max-height: 75vh;
  overflow-y: auto;
  text-align: center;
}

.modal-body img {
  max-height: 65vh;
  margin: 0 auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.modal-footer {
  padding: 12px 24px;
  background-color: #fafafa;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: right;
}

/* ==========================================================================
   Contact & Global Trade Form
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
}

.contact-info-card {
  background-color: var(--primary-dark);
  color: #ffffff;
  padding: 40px;
  border-radius: var(--radius-md);
}

.contact-info-card h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
  color: var(--accent-gold-light);
}

.contact-info-card p {
  color: #d1dfd7;
  margin-bottom: 24px;
}

.contact-details {
  list-style: none;
}

.contact-details li {
  margin-bottom: 18px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.contact-details strong {
  display: block;
  font-size: 0.85rem;
  color: var(--accent-gold);
}

.quick-connect {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

.connect-btn {
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #ffffff;
}

.connect-whatsapp { background-color: #25D366; }
.connect-telegram { background-color: #0088cc; }
.connect-mail { background-color: var(--accent-gold); }

.form-card {
  background-color: #ffffff;
  padding: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(16, 91, 56, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

.form-feedback {
  display: none;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-top: 16px;
}

.form-feedback.success {
  display: block;
  background-color: #eafaf1;
  color: #155724;
  border: 1px solid #c3e6cb;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: #0d1a13;
  color: #c4d6cc;
  padding: 70px 0 30px;
  border-top: 3px solid var(--primary-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background-color: var(--accent-gold);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a:hover {
  color: var(--accent-gold-light);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: #8fa599;
}

.footer-geo-tags {
  font-size: 0.78rem;
  color: #72867b;
}

/* ==========================================================================
   Mobile Responsive Adjustments
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: block;
  }
  .main-nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background-color: #ffffff;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    display: none;
  }
  .main-nav.active {
    display: flex;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  .grid-3, .grid-2, .grid-4 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}