/* ============================================
   ONE PCBA Corporate Website - Main Stylesheet
   ============================================ */

/* === CSS Variables === */
:root {
  --color-primary: #1B8B4E;
  --color-primary-dark: #156E3E;
  --color-primary-light: #E8F5EE;
  --color-secondary: #F08700;
  --color-secondary-dark: #D07600;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-bg: #FFFFFF;
  --color-bg-gray: #F8F9FA;
  --color-bg-dark: #0A1628;
  --color-bg-dark-2: #132B48;
  --color-border: #E5E7EB;
  --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-nav: 0 2px 20px rgba(0,0,0,0.1);
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-img: 8px;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1200px;
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

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

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(27, 139, 78, 0.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}

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

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* === Language Toggle === */
.lang-toggle {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
  letter-spacing: 0.3px;
}
.lang-toggle:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.8);
}
.header.scrolled .lang-toggle {
  border-color: var(--primary);
  color: var(--primary);
}
.header.scrolled .lang-toggle:hover {
  background: rgba(27,139,78,0.08);
}

/* === Header === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: all var(--transition);
  padding: 16px 0;
}

.header.scrolled {
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-nav);
  padding: 10px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1001;
}

.logo-img {
  height: 36px;
  width: auto;
  display: block;
}

.footer-logo {
  height: 32px;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  border-radius: 6px;
  transition: all var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: #fff;
  background: rgba(255,255,255,0.12);
}

.header.scrolled .nav-link {
  color: var(--color-text-light);
}

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

.header-cta {
  padding: 10px 22px;
  font-size: 14px;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1001;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}

.header.scrolled .mobile-toggle span {
  background: var(--color-text);
}

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

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

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

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

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

.nav-mobile .nav-link {
  font-size: 18px;
  color: var(--color-text);
  padding: 12px 24px;
}

.nav-mobile .nav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* === Hero === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-dark-2) 50%, #0D2237 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27,139,78,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27,139,78,0.08) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(60px, 60px); }
}

.hero-particles span {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-primary);
  border-radius: 50%;
  opacity: 0.5;
  animation: particleFloat 8s ease-in-out infinite;
}

.hero-particles span:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; }
.hero-particles span:nth-child(2) { top: 60%; left: 80%; animation-delay: 1.5s; }
.hero-particles span:nth-child(3) { top: 40%; left: 30%; animation-delay: 3s; width: 6px; height: 6px; }
.hero-particles span:nth-child(4) { top: 80%; left: 60%; animation-delay: 4.5s; }
.hero-particles span:nth-child(5) { top: 15%; left: 70%; animation-delay: 2s; width: 3px; height: 3px; }
.hero-particles span:nth-child(6) { top: 70%; left: 20%; animation-delay: 5.5s; width: 5px; height: 5px; }

@keyframes particleFloat {
  0%, 100% { transform: translate(0, 0); opacity: 0.3; }
  25% { transform: translate(20px, -30px); opacity: 0.7; }
  50% { transform: translate(-10px, -60px); opacity: 0.5; }
  75% { transform: translate(30px, -30px); opacity: 0.8; }
}

.hero-content {
  position: relative;
  text-align: center;
  z-index: 2;
  padding: 120px 0 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(27, 139, 78, 0.15);
  border: 1px solid rgba(27, 139, 78, 0.3);
  border-radius: 50px;
  color: #4ADE80;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 28px;
}

.hero-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), #4ADE80, var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: rgba(255,255,255,0.7);
  max-width: 700px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

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

.hero-stat-num {
  display: block;
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.hero-stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.15);
}

.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.hero-scroll a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.5);
  font-size: 14px;
  transition: all var(--transition);
  animation: scrollBounce 2s ease-in-out infinite;
}

.hero-scroll a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* === Sections === */
.section {
  padding: 100px 0;
}

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

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

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 17px;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* === About === */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 60px;
}

.about-image-wrapper {
  position: relative;
}

.about-image-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-dark-2) 100%);
  border-radius: var(--radius-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: rgba(255,255,255,0.6);
  overflow: hidden;
  position: relative;
}

.about-image-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27,139,78,0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27,139,78,0.1) 1px, transparent 1px);
  background-size: 30px 30px;
}

.about-image-placeholder i {
  font-size: 64px;
  color: var(--color-primary);
  position: relative;
  z-index: 1;
}

.about-image-placeholder span {
  font-size: 16px;
  font-weight: 600;
  position: relative;
  z-index: 1;
}

.about-experience-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 120px;
  height: 120px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 8px 30px rgba(27, 139, 78, 0.4);
}

.badge-num {
  font-size: 32px;
  font-weight: 800;
  line-height: 1;
}

.badge-text {
  font-size: 11px;
  text-align: center;
  line-height: 1.3;
  opacity: 0.9;
}

.about-content h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
}

.about-content p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

.about-feature i {
  color: var(--color-primary);
  font-size: 16px;
}

/* Stats Row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--color-bg);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

.stat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary);
}

.stat-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--color-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 22px;
}

.stat-number {
  font-size: 40px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  display: inline;
}

.stat-suffix {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  display: inline;
}

.stat-label {
  font-size: 14px;
  color: var(--color-text-light);
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* === Services === */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--color-bg);
  border-radius: var(--radius-card);
  padding: 36px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: var(--color-primary-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--color-primary);
  margin-bottom: 20px;
  transition: all var(--transition);
}

.service-card:hover .service-icon {
  background: var(--color-primary);
  color: #fff;
}

.service-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.service-card > p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.service-list {
  margin-bottom: 20px;
}

.service-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-light);
  padding: 4px 0;
}

.service-list li i {
  color: var(--color-primary);
  font-size: 12px;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  transition: all var(--transition);
}

.service-link:hover {
  gap: 10px;
  color: var(--color-primary-dark);
}

/* === Production === */
.equipment-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.equipment-card {
  text-align: center;
  padding: 28px 20px;
  background: var(--color-bg-gray);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.equipment-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--color-primary);
}

.equipment-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  background: var(--color-primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--color-primary);
}

.equipment-card h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.equipment-card p {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 10px;
}

.equipment-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 600;
  border-radius: 50px;
}

/* Production Flow */
.production-flow {
  margin-bottom: 50px;
}

.flow-title {
  text-align: center;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 40px;
  color: var(--color-text);
}

.flow-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.flow-step {
  text-align: center;
  flex: 0 0 150px;
  position: relative;
}

.flow-step-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.flow-step-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 12px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
  transition: all var(--transition);
}

.flow-step:hover .flow-step-icon {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(27, 139, 78, 0.35);
}

.flow-step h4 {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--color-text);
}

.flow-step p {
  font-size: 11px;
  color: var(--color-text-muted);
}

.flow-connector {
  display: flex;
  align-items: center;
  padding-top: 28px;
  color: var(--color-primary);
  font-size: 14px;
  opacity: 0.5;
}

/* Capacity Banner */
.capacity-banner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-dark-2) 100%);
  border-radius: var(--radius-card);
  padding: 40px;
}

.capacity-item {
  text-align: center;
}

.capacity-num {
  display: block;
  font-size: 36px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}

.capacity-label {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}

/* === Quality Control === */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.quality-card {
  background: var(--color-bg);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition);
}

.quality-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.quality-card-header {
  padding: 24px 28px;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--color-border);
}

.quality-card-header i {
  font-size: 24px;
  color: var(--color-primary);
}

.quality-card-header h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}

.qc-steps {
  padding: 24px 28px;
}

.qc-step {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.qc-step:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.qc-step-badge {
  display: inline-block;
  padding: 2px 10px;
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 8px;
}

.qc-step h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--color-text);
}

.qc-step p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* Equipment List */
.equipment-list {
  padding: 24px 28px;
}

.equip-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
}

.equip-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.equip-item i {
  font-size: 20px;
  color: var(--color-primary);
  margin-top: 2px;
  flex-shrink: 0;
}

.equip-item h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--color-text);
}

.equip-item p {
  font-size: 12px;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* ISO Cert Card */
.quality-cert {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-light), #fff);
}

.cert-content {
  text-align: center;
  padding: 28px;
}

.cert-badge {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: #fff;
  box-shadow: 0 8px 30px rgba(27, 139, 78, 0.3);
}

.cert-content h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.cert-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.cert-desc {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 20px;
}

.cert-details {
  text-align: left;
}

.cert-detail {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.cert-detail i {
  color: var(--color-primary);
  width: 16px;
}

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

.product-card {
  background: var(--color-bg);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition);
  position: relative;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.product-image {
  height: 160px;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-dark-2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27,139,78,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27,139,78,0.06) 1px, transparent 1px);
  background-size: 20px 20px;
}

.product-image i {
  font-size: 48px;
  color: var(--color-primary);
  position: relative;
  z-index: 1;
  transition: transform var(--transition);
}

.product-card:hover .product-image i {
  transform: scale(1.1);
}

.product-info {
  padding: 20px;
}

.product-info h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--color-text);
}

.product-info p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.5;
}

.product-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 12px;
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  border-radius: 50px;
}

/* === Partners === */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.partner-card {
  background: var(--color-bg);
  border-radius: var(--radius-card);
  padding: 28px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  min-height: 90px;
}

.partner-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--color-primary);
}

.partner-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-light);
  text-align: center;
  transition: color var(--transition);
}

.partner-card:hover .partner-name {
  color: var(--color-primary);
}

.partners-cta {
  text-align: center;
}

.partners-cta p {
  font-size: 17px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

.contact-form-wrapper {
  background: var(--color-bg);
  border-radius: var(--radius-card);
  padding: 36px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

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

.form-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.form-group label i {
  color: var(--color-primary);
  font-size: 12px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg-gray);
  transition: all var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(27, 139, 78, 0.1);
  background: #fff;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form-success {
  text-align: center;
  padding: 40px;
}

.form-success i {
  font-size: 64px;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.form-success h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.form-success p {
  font-size: 15px;
  color: var(--color-text-light);
}

/* Contact Info */
.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-info-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px;
  background: var(--color-bg-gray);
  border-radius: var(--radius-btn);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.contact-info-card:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.contact-info-icon {
  width: 42px;
  height: 42px;
  background: var(--color-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  flex-shrink: 0;
}

.contact-info-card h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--color-text);
}

.contact-info-card p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.5;
}

.contact-info-card a {
  color: var(--color-primary);
  font-weight: 500;
}

.contact-info-card a:hover {
  text-decoration: underline;
}

.map-container {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}

/* === Footer === */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

/* (no longer needed - logo uses img tag) */

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  margin-top: 16px;
  margin-bottom: 20px;
  color: rgba(255,255,255,0.5);
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 15px;
  transition: all var(--transition);
}

.footer-social a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  padding: 5px 0;
  transition: all var(--transition);
}

.footer-links a:hover {
  color: var(--color-primary);
  padding-left: 6px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

.footer-contact-item i {
  color: var(--color-primary);
  margin-top: 3px;
  flex-shrink: 0;
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

.footer-legal {
  margin-top: 6px;
  font-size: 12px !important;
}

/* === Back to Top === */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 16px;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(27, 139, 78, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 999;
}

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

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
}

/* === Animations === */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Stagger children */
.fade-up-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up-stagger.visible > *:nth-child(1) { transition-delay: 0s; }
.fade-up-stagger.visible > *:nth-child(2) { transition-delay: 0.1s; }
.fade-up-stagger.visible > *:nth-child(3) { transition-delay: 0.15s; }
.fade-up-stagger.visible > *:nth-child(4) { transition-delay: 0.2s; }
.fade-up-stagger.visible > *:nth-child(5) { transition-delay: 0.25s; }
.fade-up-stagger.visible > *:nth-child(6) { transition-delay: 0.3s; }
.fade-up-stagger.visible > *:nth-child(7) { transition-delay: 0.35s; }
.fade-up-stagger.visible > *:nth-child(8) { transition-delay: 0.4s; }

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

/* === Responsive === */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

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

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

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

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

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

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

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

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .nav-desktop,
  .header-cta {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .nav-mobile {
    display: flex;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .hero-stats {
    gap: 20px;
  }

  .hero-stat-num {
    font-size: 28px;
  }

  .hero-stat-divider {
    display: none;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

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

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

  .about-experience-badge {
    width: 90px;
    height: 90px;
    bottom: -10px;
    right: -10px;
  }

  .badge-num {
    font-size: 24px;
  }

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

  .flow-steps {
    flex-direction: column;
    align-items: center;
  }

  .flow-connector {
    transform: rotate(90deg);
    padding: 8px 0;
  }

  .capacity-banner {
    grid-template-columns: repeat(2, 1fr);
    padding: 24px;
  }

  .capacity-num {
    font-size: 28px;
  }

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

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-card {
    padding: 20px 12px;
  }

  .stat-number {
    font-size: 32px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-content {
    padding: 100px 0 60px;
  }

  .hero-badge {
    font-size: 12px;
    padding: 6px 14px;
  }

  .section-title {
    font-size: 24px;
  }

  .section-desc {
    font-size: 14px;
  }

  .service-card {
    padding: 24px;
  }

  .contact-form-wrapper {
    padding: 24px;
  }

  .partners-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .partner-card {
    padding: 16px 12px;
    min-height: 70px;
  }
}