/* 
  Shangrui Furniture Global Styles
  Font: Helvetica, Arial, sans-serif
  Color: Orange (#FF6321)
*/

:root {
  --primary-orange: #FF6321;
  --text-dark: #1A1A1A;
  --text-muted: #666666;
  --bg-light: #F9F9F9;
  --white: #FFFFFF;
  --border-color: #EEEEEE;
  --font-family: 'Helvetica', 'Arial', sans-serif;
  --transition: all 0.3s ease;
  --container-max-width: 1200px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  font-weight: 700;
}

p {
  margin-bottom: 1.5rem;
}

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

/* Layout */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 5rem 0;
}

/* Header & Navigation */
header {
  background: var(--white);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.logo {
  color: var(--primary-orange);
  display: flex;
  align-items: center;
  gap: 15px;
  font-family: 'Helvetica', 'Arial', sans-serif;
}

.logo-en-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1;
}

.logo-shangrui {
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 0.05em;
}

.logo-furniture {
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  margin-top: 2px;
}

.logo-cn {
  font-size: 1.6rem;
  font-weight: 400;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--primary-orange);
}

.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-dark);
}

/* Hero Section */
.hero {
  height: 80vh;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  color: var(--white);
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.4);
}

.hero-content {
  position: relative;
  max-width: 700px;
}

.hero h1 {
  font-size: 4rem;
  line-height: 1.1;
  margin-bottom: 2rem;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2.5rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: var(--primary-orange);
  color: var(--white);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.1em;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn:hover {
  background: #E5521B;
  transform: translateY(-2px);
}

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

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

/* Grid Systems */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 3rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* Footer */
footer {
  background: #111;
  color: var(--white);
  padding: 5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-logo .logo {
  margin-bottom: 1.5rem;
}

.footer-links h4 {
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

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

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  color: #999;
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: var(--primary-orange);
}

.footer-bottom {
  border-top: 1px solid #222;
  padding-top: 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: #666;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero h1 { font-size: 3rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--white);
    flex-direction: column;
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links.active {
    display: flex;
  }

  .hamburger {
    display: block;
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero h1 { font-size: 2.5rem; }
  
  section { padding: 3rem 0; }
}

/* Language Switching */
html[lang="en"] .zh { display: none !important; }
html[lang="zh"] .en { display: none !important; }

.lang-switch {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-left: 1.5rem;
}

.lang-btn {
  background: none;
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition);
  border-radius: 2px;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.lang-btn.active {
  background: var(--primary-orange);
  color: var(--white);
  border-color: var(--primary-orange);
}

.lang-btn:hover:not(.active) {
  border-color: var(--primary-orange);
  color: var(--primary-orange);
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--border-color);
  font-family: inherit;
}

.success-message {
  display: none;
  background: #E8F5E9;
  color: #2E7D32;
  padding: 1rem;
  margin-top: 1rem;
  border-radius: 4px;
}

/* Detailed Product Sections */
.product-detail-section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--border-color);
}

.product-detail-section:last-child {
  border-bottom: none;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.product-detail-image {
  width: 100%;
  border-radius: 4px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.spec-list {
  list-style: none;
  margin-top: 1.5rem;
}

.spec-list li {
  margin-bottom: 0.8rem;
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.95rem;
}

.spec-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-orange);
  font-weight: bold;
}

.spec-category {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--primary-orange);
  margin-top: 2rem;
  display: block;
  margin-bottom: 0.5rem;
}

@media (max-width: 992px) {
  .product-detail-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}
.product-card {
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.product-card:hover {
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.product-img {
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
  background: #EEE;
}

.product-info {
  padding: 1.5rem;
}

.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
}

.faq-question {
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  display: none;
  padding-top: 1rem;
  color: var(--text-muted);
}

.faq-item.active .faq-answer {
  display: block;
}

.testimonial-card {
  background: var(--bg-light);
  padding: 2rem;
  border-left: 4px solid var(--primary-orange);
}

.testimonial-text {
  font-style: italic;
  margin-bottom: 1rem;
}

.testimonial-author {
  font-weight: 700;
  font-size: 0.9rem;
}