/* ============================================
   广州市禾信合成材料有限公司 - B2B工厂独立站
   专业工业风 | 品牌蓝+工业灰+活力橙CTA
   ============================================ */

/* ===== CSS Variables ===== */
:root {
  --color-primary: #1B4D89;
  --color-primary-light: #2A6BB3;
  --color-primary-dark: #143A66;
  --color-secondary: #4A5568;
  --color-accent: #E67E22;
  --color-accent-hover: #D35400;
  --color-bg: #F7F9FC;
  --color-dark: #1A2332;
  --color-success: #27AE60;
  --color-warning: #F39C12;
  --color-error: #E74C3C;
  --color-white: #FFFFFF;
  --color-border: #E2E8F0;
  --color-text: #2D3748;
  --color-text-light: #718096;

  --font-cn: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-en: "Inter", "Roboto", sans-serif;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);

  --transition: all 0.3s ease;
  --radius: 6px;
  --radius-lg: 12px;
  --container-max: 1200px;
}

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

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

body {
  font-family: var(--font-cn);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
  padding-top: 92px;
}

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

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

ul {
  list-style: none;
}

/* ===== Container ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Section ===== */
.section {
  padding: 60px 0;
}

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

.section-title {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 16px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

.section-subtitle {
  text-align: center;
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 40px;
}

.section-title.light {
  color: var(--color-white);
}

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

/* ===== Header / Navigation ===== */
/* ===== Two-Row Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: var(--transition);
}

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

/* Top Bar */
.header-top-bar {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: 8px 0;
}

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

.header-logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.header-logo-img {
  height: 36px;
  width: auto;
  border-radius: var(--radius);
  background: var(--color-white);
  padding: 2px;
  object-fit: contain;
}

.header-logo-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.header-logo-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-white);
}

.header-logo-sub {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.75);
  font-weight: 400;
  letter-spacing: 0.5px;
}

.header-top-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-contact-info {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.82rem;
}

.header-contact-info a {
  color: rgba(255,255,255,0.9);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}

.header-contact-info a:hover {
  color: var(--color-white);
}

.header-contact-info svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
  flex-shrink: 0;
}

/* Language Switcher */
.lang-switcher {
  position: relative;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--color-white);
  padding: 5px 12px;
  font-size: 0.82rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: inherit;
  transition: var(--transition);
  white-space: nowrap;
}

.lang-btn:hover {
  background: rgba(255,255,255,0.22);
  border-color: rgba(255,255,255,0.35);
}

.lang-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 6px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  z-index: 1100;
  overflow: hidden;
}

.lang-dropdown.show {
  display: block;
}

.lang-dropdown a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.lang-dropdown a:last-child {
  border-bottom: none;
}

.lang-dropdown a:hover:not(.disabled) {
  background: var(--color-bg);
  color: var(--color-primary);
}

.lang-dropdown a.disabled {
  color: var(--color-text-light);
  cursor: not-allowed;
  opacity: 0.6;
}

.header-top-bar .lang-btn {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.2);
  color: var(--color-white);
  padding: 5px 12px;
  font-size: 0.82rem;
}

.header-top-bar .lang-btn:hover {
  background: rgba(255,255,255,0.22);
  border-color: rgba(255,255,255,0.35);
}

.header-top-bar .btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  padding: 6px 16px;
  font-size: 0.82rem;
  border-radius: 20px;
  font-weight: 600;
}

.header-top-bar .btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* Nav Bar */
.header-nav-bar {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.header-nav-bar .container {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: 48px;
}

.header-nav-bar .nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header-nav-bar .nav-menu a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding: 5px 0;
  transition: var(--transition);
}

.header-nav-bar .nav-menu a:hover,
.header-nav-bar .nav-menu a.active {
  color: var(--color-primary);
}

.header-nav-bar .nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

/* Mobile menu toggle */
.header-nav-bar .menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.header-nav-bar .menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* CTA Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), #F39C12);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(230,126,34,0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-accent-hover), var(--color-accent));
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(230,126,34,0.4);
}

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

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

.btn-blue {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(27,77,137,0.3);
}

.btn-blue:hover {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(27,77,137,0.4);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.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(7px, -7px);
}

/* ===== Hero Banner ===== */
.hero {
  position: relative;
  height: 600px;
  margin-top: 0;
  overflow: hidden;
  background: var(--color-dark);
}

.hero-slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  display: flex;
  align-items: center;
}

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

.hero-slide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(26,35,50,0.85) 0%, rgba(27,77,137,0.7) 100%);
  z-index: 1;
}

.hero-slide img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
  color: var(--color-white);
}

.hero-slide.active .hero-content h1 {
  animation: heroFadeUp 0.8s ease forwards;
}

.hero-slide.active .hero-content p {
  animation: heroFadeUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.hero-slide.active .hero-content .hero-buttons {
  animation: heroFadeUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

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

.hero-content h1 {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  max-width: 700px;
}

.hero-content p {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
  max-width: 600px;
}

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

/* Hero Dots */
.hero-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 3;
}

.hero-dots button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--color-white);
  background: transparent;
  cursor: pointer;
  transition: var(--transition);
}

.hero-dots button.active {
  background: var(--color-white);
}

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

.advantage-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border-top: 4px solid var(--color-primary);
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.advantage-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

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

.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--color-white);
}

.advantage-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.advantage-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.advantage-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.advantage-tags span {
  font-size: 0.78rem;
  padding: 4px 10px;
  background: var(--color-bg);
  color: var(--color-primary);
  border-radius: 20px;
  font-weight: 500;
}

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

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}

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

.product-card .product-img {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--color-bg);
  position: relative;
}

.product-card .product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-img img {
  transform: scale(1.08);
}

.product-card .product-info {
  padding: 20px;
}

.product-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.product-card p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.product-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--color-success);
  color: var(--color-white);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 500;
}

/* ===== Customization Process ===== */
.process-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
}

.process-steps {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: rgba(255,255,255,0.2);
}

.process-step {
  flex: 1;
  text-align: center;
  position: relative;
  z-index: 1;
}

.process-step-num {
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--color-white), #F0F4F8);
  color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(255,255,255,0.3);
  transition: var(--transition);
}

.process-step:hover .process-step-num {
  transform: scale(1.1);
  box-shadow: 0 8px 30px rgba(255,255,255,0.4);
}

.process-step h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.6;
}

.process-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 40px;
}

.process-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  color: rgba(255,255,255,0.9);
}

.process-features li::before {
  content: '\2714';
  color: var(--color-accent);
  font-weight: 700;
}

/* ===== Factory Section ===== */
.factory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.factory-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.factory-item:hover {
  box-shadow: var(--shadow-lg);
}

.factory-item img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.factory-item:hover img {
  transform: scale(1.05);
}

.factory-item .factory-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  color: var(--color-white);
  padding: 20px;
}

.factory-item .factory-overlay h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.factory-item .factory-overlay p {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.8);
}

/* Stats Bar */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
  background: linear-gradient(135deg, var(--color-white) 0%, #F0F4F8 100%);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

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

.stat-num {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.stat-num .unit {
  font-size: 1.2rem;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-top: 8px;
}

/* ===== Inquiry Form Section ===== */
.inquiry-section {
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary-dark) 100%);
}

.inquiry-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.inquiry-info {
  color: var(--color-white);
}

.inquiry-info h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.inquiry-info p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 24px;
}

.inquiry-trust {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.inquiry-trust li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: rgba(255,255,255,0.9);
}

.inquiry-trust li::before {
  content: '\2714';
  color: var(--color-accent);
  font-weight: 700;
}

.inquiry-form {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-lg);
}

.inquiry-form h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 24px;
}

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

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-group label .required {
  color: var(--color-error);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-family: inherit;
  background: var(--color-bg);
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(27,77,137,0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-submit {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
}

.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}

.form-success.show {
  display: block;
}

.form-success .success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: var(--color-success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--color-white);
}

.form-success h3 {
  color: var(--color-success);
  margin-bottom: 8px;
}

.form-success p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
  border-top: 4px solid transparent;
  background-image: linear-gradient(var(--color-dark), var(--color-dark)),
    linear-gradient(90deg, var(--color-primary), var(--color-accent));
  background-origin: border-box;
  background-clip: padding-box, border-box;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
}

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

.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}

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

.footer-about p {
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.85rem;
}

.footer-contact-item .icon {
  color: var(--color-accent);
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
}

.footer-bottom a {
  color: rgba(255,255,255,0.5);
}

.footer-bottom a:hover {
  color: var(--color-accent);
}

/* ===== Floating Buttons ===== */
.float-buttons {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
}

.float-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  position: relative;
  font-size: 1.5rem;
}

.float-btn:hover {
  transform: scale(1.1);
}

.float-btn.wechat {
  background: #07C160;
  color: var(--color-white);
  animation: pulseWechat 2s ease-in-out infinite;
}

.float-btn.whatsapp {
  background: #25D366;
  color: var(--color-white);
  animation: pulseWhatsapp 2s ease-in-out infinite;
}

@keyframes pulseWechat {
  0%, 100% { box-shadow: 0 0 0 0 rgba(7,193,96,0.4); }
  50% { box-shadow: 0 0 0 12px rgba(7,193,96,0); }
}

@keyframes pulseWhatsapp {
  0%, 100% { box-shadow: 0 0 0 0 rgba(37,211,102,0.4); }
  50% { box-shadow: 0 0 0 12px rgba(37,211,102,0); }
}

.float-btn.wechat:hover,
.float-btn.whatsapp:hover {
  animation: none;
}

.float-btn .tooltip {
  position: absolute;
  right: 70px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-dark);
  color: var(--color-white);
  padding: 6px 14px;
  border-radius: var(--radius);
  font-size: 0.82rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.float-btn:hover .tooltip {
  opacity: 1;
  visibility: visible;
}

/* ===== WeChat QR Modal ===== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}

.modal-overlay.show {
  display: flex;
}

.modal-content {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  max-width: 360px;
  position: relative;
  animation: modalIn 0.3s ease;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.9) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-light);
  border: none;
  background: none;
  transition: var(--transition);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: var(--color-bg);
  color: var(--color-error);
}

.modal-content h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.modal-content .qr-image {
  width: 220px;
  height: 220px;
  margin: 0 auto 16px;
  border-radius: var(--radius);
  border: 6px solid var(--color-bg);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  display: block;
  object-fit: contain;
}

.modal-content .qr-hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--color-white);
  background: #07C160;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 8px;
}

.modal-content p {
  font-size: 0.88rem;
  color: var(--color-text-light);
}

/* ===== Page Banner ===== */
.page-banner {
  margin-top: 70px;
  height: 240px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="60" height="60" viewBox="0 0 60 60"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.03"><circle cx="30" cy="30" r="2"/></g></g></svg>');
}

.page-banner h1 {
  font-size: 2.2rem;
  font-weight: 700;
  position: relative;
  z-index: 1;
}

.page-banner p {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  margin-top: 8px;
  position: relative;
  z-index: 1;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.88rem;
  color: var(--color-text-light);
}

.breadcrumb a {
  color: var(--color-primary);
}

.breadcrumb span {
  margin: 0 8px;
}

/* ===== Content Page Styles ===== */
.content-page {
  padding: 40px 0 60px;
}

.content-section {
  margin-bottom: 48px;
}

.content-section h2 {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 4px solid var(--color-accent);
}

.content-section h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 24px 0 12px;
}

.content-section p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 12px;
}

.content-section ul,
.content-section ol {
  margin: 12px 0 12px 20px;
}

.content-section ul li,
.content-section ol li {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 6px;
  list-style: disc;
}

.content-section ol li {
  list-style: decimal;
}

/* Table Style */
.table-wrap {
  overflow-x: auto;
  margin: 16px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

table th {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}

table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

table tr:nth-child(even) {
  background: var(--color-bg);
}

table tr:hover {
  background: #EDF2F7;
}

/* Info Cards */
.info-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 24px 0;
}

.info-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border-top: 3px solid var(--color-primary);
}

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

.info-card h4 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.info-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -34px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-item .timeline-year {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.timeline-item .timeline-content {
  font-size: 0.92rem;
  color: var(--color-text);
  line-height: 1.7;
}

/* Case Cards */
.case-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  transition: var(--transition);
}

.case-card:hover {
  box-shadow: var(--shadow-md);
}

.case-card-body {
  padding: 28px;
}

.case-card .case-tag {
  display: inline-block;
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 500;
  margin-bottom: 12px;
}

.case-tag.domestic {
  background: #E6F0FA;
  color: var(--color-primary);
}

.case-tag.export {
  background: #FFF3E0;
  color: var(--color-accent);
}

.case-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.case-card .case-meta {
  margin: 12px 0;
}

.case-card .case-meta p {
  font-size: 0.9rem;
  color: var(--color-text);
  margin-bottom: 6px;
}

.case-card .case-meta strong {
  color: var(--color-primary);
  font-weight: 600;
}

/* News List */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.news-item {
  display: flex;
  gap: 20px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}

.news-item:hover {
  box-shadow: var(--shadow-md);
}

.news-date {
  flex-shrink: 0;
  width: 80px;
  text-align: center;
  border-right: 2px solid var(--color-border);
  padding-right: 20px;
}

.news-date .day {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
}

.news-date .month {
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.news-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.news-content .news-tag {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--color-bg);
  color: var(--color-text-light);
  margin-right: 8px;
}

.news-content p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-top: 6px;
}

/* Contact Info Cards */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

.contact-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.contact-card h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-bg);
}

.contact-card .contact-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.contact-card .contact-row .icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  color: var(--color-primary);
}

.contact-card .contact-row .label {
  font-size: 0.82rem;
  color: var(--color-text-light);
  margin-bottom: 2px;
}

.contact-card .contact-row .value {
  font-size: 0.95rem;
  color: var(--color-text);
  font-weight: 500;
}

/* Map */
.map-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-top: 24px;
}

.map-wrap iframe {
  width: 100%;
  height: 400px;
  border: 0;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .nav-menu {
    gap: 18px;
  }

  .nav-menu a {
    font-size: 0.88rem;
  }

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

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

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

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

  .footer-about {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  body {
    padding-top: 82px;
  }

  .header-logo-img {
    height: 30px;
  }

  .header-logo-name {
    font-size: 0.88rem;
  }

  .header-logo-sub {
    display: none;
  }

  .header-contact-info {
    display: none;
  }

  .header-top-bar .btn-primary {
    padding: 5px 12px;
    font-size: 0.78rem;
  }

  .header-top-bar .lang-btn {
    padding: 4px 10px;
    font-size: 0.78rem;
  }

  .lang-dropdown {
    min-width: 180px;
  }

  .lang-dropdown a {
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  .header-top-right {
    gap: 10px;
  }

  .header-nav-bar .container {
    height: 42px;
  }

  .header-nav-bar .nav-menu {
    position: fixed;
    top: 82px;
    left: 0;
    width: 100%;
    background: var(--color-white);
    flex-direction: column;
    padding: 20px;
    gap: 0;
    box-shadow: var(--shadow-md);
    transform: translateY(-200%);
    transition: var(--transition);
    max-height: calc(100vh - 82px);
    overflow-y: auto;
  }

  .header-nav-bar .nav-menu.show {
    transform: translateY(0);
  }

  .header-nav-bar .nav-menu a {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 1rem;
  }

  .header-nav-bar .menu-toggle {
    display: flex;
  }

  .hero {
    height: 500px;
  }

  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .section {
    padding: 40px 0;
  }

  .section-title {
    font-size: 1.5rem;
  }

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

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

  .process-steps {
    flex-direction: column;
    gap: 32px;
  }

  .process-steps::before {
    display: none;
  }

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

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 20px;
  }

  .stat-num {
    font-size: 2rem;
  }

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

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

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

  .float-buttons {
    bottom: 20px;
    right: 20px;
  }

  .float-btn {
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
  }

  .page-banner {
    height: 180px;
  }

  .page-banner h1 {
    font-size: 1.6rem;
  }

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

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

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }

  .stats-bar {
    grid-template-columns: 1fr;
  }

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

  .hero-content h1 {
    font-size: 1.5rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
  }
}

/* ===== Product Gallery Grid ===== */
.product-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.product-gallery-item {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid var(--color-border);
}

.product-gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.product-gallery-item .gallery-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
}

.product-gallery-item .gallery-caption {
  padding: 8px 10px;
  font-size: 0.78rem;
  color: var(--color-text);
  text-align: center;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* ===== Detail Images Strip ===== */
.product-details-strip {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 12px 0;
  margin-top: 16px;
  scroll-behavior: smooth;
}

.product-details-strip img {
  height: 100px;
  width: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
  transition: var(--transition);
}

.product-details-strip img:hover {
  height: 140px;
  box-shadow: var(--shadow-md);
}

/* ===== Empty Category Card ===== */
.product-empty-card {
  text-align: center;
  padding: 32px 20px;
  background: linear-gradient(135deg, var(--color-bg) 0%, #e8f0fe 100%);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--color-border);
}

.product-empty-card .empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.product-empty-card h4 {
  color: var(--color-primary);
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.product-empty-card p {
  color: var(--color-text-light);
  font-size: 0.85rem;
}

/* ===== Category Quick Nav ===== */
.category-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 30px;
  padding: 16px;
  background: linear-gradient(135deg, var(--color-bg) 0%, #f0f5ff 100%);
  border-radius: var(--radius-lg);
}

.category-nav a {
  padding: 6px 16px;
  background: var(--color-white);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--color-primary);
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid var(--color-border);
  font-weight: 500;
}

.category-nav a:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

/* ===== Sub-category Title ===== */
.sub-category-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-primary);
  margin: 24px 0 8px;
  padding-left: 12px;
  border-left: 4px solid var(--color-accent);
}

/* ===== Product Video ===== */
.product-video-wrap {
  margin-top: 16px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.product-video-wrap video {
  width: 100%;
  display: block;
}

/* ===== Lightbox ===== */
.lightbox-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.9);
  z-index: 10000;
  justify-content: center;
  align-items: center;
  cursor: zoom-out;
}

.lightbox-overlay.show {
  display: flex;
}

.lightbox-overlay img {
  max-width: 90%;
  max-height: 90vh;
  border-radius: var(--radius);
  box-shadow: 0 0 30px rgba(0,0,0,0.5);
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 2.5rem;
  color: #fff;
  cursor: pointer;
  z-index: 10001;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 3rem;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  z-index: 10001;
  user-select: none;
}

.lightbox-nav:hover { color: #fff; }
.lightbox-prev { left: 30px; }
.lightbox-next { right: 30px; }

/* ===== Mobile Gallery ===== */
@media (max-width: 768px) {
  .product-gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .product-gallery-item .gallery-caption {
    font-size: 0.72rem;
    padding: 6px;
  }

  .product-details-strip img {
    height: 80px;
  }

  .category-nav a {
    font-size: 0.78rem;
    padding: 5px 12px;
  }
}

@media (max-width: 480px) {
  .product-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===== Back to Top Button ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  left: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-white);
  color: var(--color-primary);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
}

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

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

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* ===== Selection ===== */
::selection {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ===== Mobile Back to Top ===== */
@media (max-width: 768px) {
  .back-to-top {
    bottom: 20px;
    left: 20px;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}