/* =============================================
   ShuangShuang Packaging - Global Stylesheet
   ============================================= */

/* CSS Variables */
:root {
  --primary: #1a1a2e;
  --primary-dark: #0f0f1a;
  --accent: #e94560;
  --accent-hover: #d03050;
  --text-dark: #1a1a2e;
  --text-body: #374151;
  --text-light: #6b7280;
  --text-muted: #9ca3af;
  --bg-light: #f8f9fa;
  --bg-section: #f1f3f5;
  --border: #e5e7eb;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.15);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
  --header-height: 72px;
  --font-mono: 'Roboto Mono', monospace;
}

/* Reset & Base */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-body);
  line-height: 1.6;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ============ Layout ============ */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  display: block;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.section-desc {
  font-size: 1.0625rem;
  color: var(--text-light);
  max-width: 600px;
  line-height: 1.75;
}
.section-header { margin-bottom: 56px; }
.section-header-center { text-align: center; }
.section-header-center .section-desc { margin: 0 auto; }
.text-center { text-align: center; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.mt-48 { margin-top: 48px; }

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  border: 2px solid transparent;
  white-space: nowrap;
  line-height: 1;
}
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-accent { background: var(--accent); color: var(--white); border-color: var(--accent); }
.btn-accent:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--white); }
.btn-outline-white { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.6); }
.btn-outline-white:hover { background: var(--white); color: var(--primary); }
.btn-sm { padding: 9px 20px; font-size: 0.875rem; }
.btn-lg { padding: 16px 40px; font-size: 1.0625rem; }
.btn-full { width: 100%; }
.btn svg { width: 18px; height: 18px; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ============ Header / Navigation ============ */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s;
}
header.scrolled { box-shadow: var(--shadow-md); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}
.logo img { height: 36px; width: auto; }
.logo span { color: var(--accent); }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-light);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); background: var(--bg-light); }
.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--primary); transition: var(--transition); border-radius: 2px; }
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Nav Overlay */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--white);
  z-index: 999;
  padding: 24px;
  overflow-y: auto;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 14px 16px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-body);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.mobile-nav a:hover, .mobile-nav a.active { background: var(--bg-light); color: var(--primary); }
.mobile-nav-divider { height: 1px; background: var(--border); margin: 12px 0; }
.mobile-nav .btn { margin-top: 8px; justify-content: center; }
.page-offset { padding-top: var(--header-height); }

/* ============ Footer ============ */
footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.8);
  padding: 72px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
}
.footer-brand .logo { color: var(--white); margin-bottom: 16px; }
.footer-brand p { font-size: 0.875rem; line-height: 1.75; color: rgba(255,255,255,0.6); max-width: 280px; }
.footer-social { display: flex; gap: 10px; margin-top: 20px; }
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  transition: var(--transition);
  font-size: 0.875rem;
}
.footer-social a:hover { background: var(--accent); color: var(--white); }
.footer-col h4 { font-size: 0.875rem; font-weight: 700; color: var(--white); margin-bottom: 18px; letter-spacing: 0.5px; text-transform: uppercase; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { font-size: 0.875rem; color: rgba(255,255,255,0.6); transition: color 0.2s; }
.footer-col ul a:hover { color: var(--white); }
.footer-contact-item { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 10px; font-size: 0.875rem; color: rgba(255,255,255,0.6); }
.footer-contact-item svg { flex-shrink: 0; margin-top: 2px; opacity: 0.7; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { color: rgba(255,255,255,0.4); transition: color 0.2s; }
.footer-bottom-links a:hover { color: rgba(255,255,255,0.7); }

/* ============ Hero ============ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--bg-light) 0%, #e8ecf0 100%);
  padding-top: var(--header-height);
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 50%;
  height: 100%;
  background: var(--primary);
  clip-path: polygon(15% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
}
.hero-content { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(233,69,96,0.1);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 100px;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.75rem); font-weight: 900; color: var(--primary); line-height: 1.08; margin-bottom: 24px; letter-spacing: -1px; }
.hero h1 .hl { color: var(--accent); }
.hero-desc { font-size: 1.125rem; color: var(--text-light); margin-bottom: 40px; max-width: 460px; line-height: 1.8; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 32px; margin-top: 48px; padding-top: 40px; border-top: 1px solid var(--border); }
.hero-stat-num { font-size: 1.875rem; font-weight: 800; color: var(--primary); line-height: 1; }
.hero-stat-label { font-size: 0.8rem; color: var(--text-light); margin-top: 4px; }
.hero-visual { position: relative; }
.hero-carousel-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  aspect-ratio: 4/3;
  background: var(--bg-light);
}
.hero-carousel-wrap img { width: 100%; height: 100%; object-fit: cover; }

/* Carousel */
.carousel { position: relative; width: 100%; height: 100%; overflow: hidden; }
.carousel-track { display: flex; height: 100%; transition: transform 0.5s ease; }
.carousel-slide { min-width: 100%; height: 100%; flex-shrink: 0; }
.carousel-slide img { width: 100%; height: 100%; object-fit: cover; }
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  background: rgba(0,0,0,0.5);
  color: white;
  border-radius: 50%;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background 0.3s;
  cursor: pointer;
  border: none;
}
.carousel-btn:hover { background: rgba(0,0,0,0.75); }
.carousel-btn.prev { left: 12px; }
.carousel-btn.next { right: 12px; }
.carousel-dots {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
}
.carousel-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.5); border: none; cursor: pointer; transition: all 0.3s; }
.carousel-dot.active { background: white; width: 20px; border-radius: 4px; }

/* ============ Cards ============ */
.card {
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.1); }
/* Image: square, white bg, full product visible */
.card-img { aspect-ratio: 1/1; overflow: hidden; background: #f8f9fa; flex-shrink: 0; }
.card-img img { width: 100%; height: 100%; object-fit: contain; padding: 16px; box-sizing: border-box; transition: transform 0.3s; }
.card:hover .card-img img { transform: scale(1.04); }
/* Body */
.card-body { padding: 12px 14px; flex: 1; }
.card-tag {
  display: inline-block; padding: 2px 8px;
  background: rgba(233,69,96,0.08); color: var(--accent);
  font-size: 0.7rem; font-weight: 600; border-radius: 4px; margin-bottom: 6px;
}
.card-title { font-size: 0.875rem; font-weight: 700; color: var(--primary); line-height: 1.45; margin-bottom: 4px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-sku { font-size: 0.7rem; color: #bbb; font-family: monospace; margin-bottom: 5px; }
.card-desc { font-size: 0.8rem; color: var(--text-light); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-price { font-size: 0.875rem; font-weight: 700; color: var(--accent); margin-top: 8px; }
/* Footer: two small buttons */
.card-footer { display: flex; border-top: 1px solid var(--border); flex-shrink: 0; }
.card-footer a, .card-footer span {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 9px 6px; font-size: 0.78rem; font-weight: 600;
  text-decoration: none; cursor: pointer; transition: background 0.15s;
}
.card-footer .cf-detail { color: var(--primary); background: white; }
.card-footer .cf-detail:hover { background: var(--bg-light); }
.card-footer .cf-quote { color: white; background: var(--accent); }
.card-footer .cf-quote:hover { background: var(--accent-hover); }
.card-footer .cf-divider { width: 1px; background: var(--border); flex: 0; }

/* Category Card */
.cat-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
  display: block;
}
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.cat-card-img { aspect-ratio: 16/10; overflow: hidden; background: var(--bg-light); }
.cat-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.cat-card:hover .cat-card-img img { transform: scale(1.06); }
.cat-card-body { padding: 20px; }
.cat-card-body h3 { font-size: 1.0625rem; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.cat-card-body p { font-size: 0.875rem; color: var(--text-light); }

/* ============ Product Grid ============ */
.products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.categories-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }

/* ============ Inquiry Form ============ */
.inquiry-section { background: var(--bg-section); }
.inquiry-wrap {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 64px;
  align-items: start;
}
.inquiry-info h2 { font-size: 2rem; font-weight: 800; color: var(--primary); margin-bottom: 16px; }
.inquiry-info p { color: var(--text-light); margin-bottom: 32px; line-height: 1.75; }
.inquiry-highlights { display: flex; flex-direction: column; gap: 14px; }
.inquiry-highlight { display: flex; gap: 12px; align-items: flex-start; }
.inquiry-highlight-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(233,69,96,0.1);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.inquiry-highlight-icon svg { width: 18px; height: 18px; }
.inquiry-highlight-text h4 { font-size: 0.9rem; font-weight: 600; color: var(--primary); }
.inquiry-highlight-text p { font-size: 0.8125rem; color: var(--text-light); }
.inquiry-form-card { background: var(--white); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow-lg); }

/* Form Styles */
.form-group { margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
label { display: block; font-size: 0.875rem; font-weight: 600; color: var(--text-dark); margin-bottom: 7px; }
label .req { color: var(--accent); margin-left: 3px; }
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--text-dark);
  background: var(--white);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,26,46,0.08);
}
input.error, select.error, textarea.error { border-color: var(--accent); }
textarea { resize: vertical; min-height: 100px; }
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 40px; cursor: pointer; }
.form-hint { font-size: 0.8rem; color: var(--text-muted); margin-top: 5px; }
.form-error { font-size: 0.8rem; color: var(--accent); margin-top: 5px; display: none; }
.form-error.show { display: block; }

/* File Upload */
.file-upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg-light);
}
.file-upload-area:hover, .file-upload-area.drag-over { border-color: var(--primary); background: rgba(26,26,46,0.04); }
.file-upload-area svg { color: var(--text-muted); margin: 0 auto 10px; }
.file-upload-area p { font-size: 0.875rem; color: var(--text-light); }
.file-upload-area span { font-size: 0.8rem; color: var(--text-muted); }
.file-upload-area input { display: none; }
.file-list { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.file-item { display: flex; align-items: center; gap: 10px; padding: 8px 12px; background: var(--bg-light); border-radius: var(--radius-sm); font-size: 0.8125rem; }
.file-item-name { flex: 1; color: var(--text-body); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-item-size { color: var(--text-muted); }
.file-item-remove { color: var(--accent); cursor: pointer; padding: 2px; transition: opacity 0.2s; }
.file-item-remove:hover { opacity: 0.7; }

/* Form success/error */
.form-message { display: none; padding: 16px 20px; border-radius: var(--radius-md); margin-bottom: 20px; font-size: 0.9rem; font-weight: 500; }
.form-message.success { display: flex; gap: 10px; align-items: center; background: #d1fae5; color: #065f46; }
.form-message.error-msg { display: flex; gap: 10px; align-items: center; background: #fee2e2; color: #991b1b; }

/* Honeypot */
.hp-field { display: none !important; }

/* ============ Page Banner ============ */
.page-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 80px 0;
  color: var(--white);
}
.page-banner h1 { font-size: clamp(1.75rem, 4vw, 3rem); font-weight: 800; margin-bottom: 14px; }
.page-banner p { font-size: 1.0625rem; color: rgba(255,255,255,0.7); max-width: 560px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; margin-bottom: 24px; font-size: 0.85rem; color: rgba(255,255,255,0.55); }
.breadcrumb a { color: rgba(255,255,255,0.55); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb span { color: rgba(255,255,255,0.3); }

/* ============ Features / Stats ============ */
.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 28px; }
.feature-card {
  padding: 28px;
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(233,69,96,0.1);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-card h3 { font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.feature-card p { font-size: 0.875rem; color: var(--text-light); line-height: 1.65; }
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px; background: var(--border); border-radius: var(--radius-md); overflow: hidden; }
.stat-item { background: var(--white); padding: 36px 28px; text-align: center; }
.stat-num { font-size: 2.5rem; font-weight: 900; color: var(--primary); line-height: 1; }
.stat-num span { color: var(--accent); }
.stat-label { font-size: 0.875rem; color: var(--text-light); margin-top: 6px; }

/* ============ CTA Banner ============ */
.cta-banner {
  background: linear-gradient(135deg, var(--primary) 0%, #2d1b69 100%);
  padding: 80px 0;
  text-align: center;
  color: var(--white);
}
.cta-banner h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); font-weight: 800; margin-bottom: 16px; }
.cta-banner p { font-size: 1.0625rem; color: rgba(255,255,255,0.75); margin-bottom: 36px; max-width: 520px; margin-left: auto; margin-right: auto; }
.cta-banner .btns { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ============ About Page ============ */
.about-intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-intro-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-xl); aspect-ratio: 4/3; background: var(--bg-light); }
.about-intro-img img { width: 100%; height: 100%; object-fit: cover; }
.company-info-box { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 28px; margin-top: 32px; }
.company-info-box h3 { font-size: 0.875rem; font-weight: 700; color: var(--primary); margin-bottom: 18px; text-transform: uppercase; letter-spacing: 1px; }
.company-info-item { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border); align-items: flex-start; font-size: 0.9rem; }
.company-info-item:last-child { border-bottom: none; }
.company-info-item .icon { color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.company-info-item strong { display: block; font-weight: 600; color: var(--text-dark); font-size: 0.825rem; margin-bottom: 2px; }
.company-info-item span { color: var(--text-light); }

/* ============ FAQ ============ */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; background: var(--white); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--primary);
  text-align: left;
  cursor: pointer;
  gap: 16px;
  transition: background 0.2s;
}
.faq-question:hover { background: var(--bg-light); }
.faq-question svg { flex-shrink: 0; transition: transform 0.3s; }
.faq-item.open .faq-question svg { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s; }
.faq-answer-inner { padding: 0 24px 20px; font-size: 0.9rem; color: var(--text-light); line-height: 1.75; }
.faq-item.open .faq-answer { max-height: 400px; }

/* ============ Tabs ============ */
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--border); margin-bottom: 36px; }
.tab-btn {
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-light);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
  cursor: pointer;
  border-top: none;
  border-left: none;
  border-right: none;
  background: none;
}
.tab-btn:hover { color: var(--primary); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ============ Product Detail ============ */
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.product-gallery { position: sticky; top: calc(var(--header-height) + 24px); }
.gallery-main { aspect-ratio: 1; border-radius: var(--radius-lg); overflow: hidden; background: var(--bg-light); margin-bottom: 12px; }
.gallery-main img { width: 100%; height: 100%; object-fit: cover; }
.gallery-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.gallery-thumb { aspect-ratio: 1; border-radius: var(--radius-sm); overflow: hidden; cursor: pointer; border: 2px solid transparent; transition: border-color 0.2s; }
.gallery-thumb.active { border-color: var(--primary); }
.gallery-thumb img { width: 100%; height: 100%; object-fit: cover; }
.product-info h1 { font-size: 2rem; font-weight: 800; color: var(--primary); margin-bottom: 12px; }
.product-sku { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 20px; font-family: var(--font-mono); }
.product-badges { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.badge { padding: 4px 12px; border-radius: 100px; font-size: 0.775rem; font-weight: 600; }
.badge-primary { background: rgba(26,26,46,0.08); color: var(--primary); }
.badge-accent { background: rgba(233,69,96,0.1); color: var(--accent); }
.product-params { margin: 24px 0; }
.params-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.params-table tr { border-bottom: 1px solid var(--border); }
.params-table tr:last-child { border-bottom: none; }
.params-table td { padding: 10px 0; }
.params-table td:first-child { font-weight: 600; color: var(--text-dark); width: 40%; }
.params-table td:last-child { color: var(--text-light); }
.product-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.product-share { display: flex; align-items: center; gap: 10px; margin-top: 20px; font-size: 0.85rem; color: var(--text-light); }

/* Custom Options */
.custom-option-section { background: var(--bg-section); border-radius: var(--radius-md); padding: 24px; margin-top: 24px; }
.custom-option-section h3 { font-size: 0.875rem; font-weight: 700; color: var(--primary); margin-bottom: 14px; text-transform: uppercase; letter-spacing: 1px; }
.custom-options-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.custom-option-item { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-body); }
.custom-option-item svg { color: var(--accent); flex-shrink: 0; }

/* ============ Solutions Page ============ */
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.process-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 24px);
  right: calc(12.5% + 24px);
  height: 2px;
  background: var(--border);
  z-index: 0;
}
.process-step { text-align: center; position: relative; z-index: 1; }
.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.process-step h3 { font-size: 0.9375rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.process-step p { font-size: 0.8125rem; color: var(--text-light); line-height: 1.6; }

/* ============ Industries ============ */
.industries-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.industry-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  aspect-ratio: 4/3;
  background: var(--bg-light);
  transition: var(--transition);
}
.industry-card:hover { transform: scale(1.02); box-shadow: var(--shadow-lg); }
.industry-card img { width: 100%; height: 100%; object-fit: cover; }
.industry-card-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  padding: 28px 16px 14px;
  color: var(--white);
}
.industry-card-overlay h3 { font-size: 0.9375rem; font-weight: 700; }
.industry-card-overlay p { font-size: 0.8rem; color: rgba(255,255,255,0.75); margin-top: 2px; }

/* ============ Utility ============ */
.bg-light { background: var(--bg-light); }
.bg-section { background: var(--bg-section); }
.bg-primary { background: var(--primary); }
.divider { height: 1px; background: var(--border); }
.tag { display: inline-block; padding: 4px 12px; border-radius: 100px; font-size: 0.775rem; font-weight: 600; background: var(--bg-section); color: var(--text-light); }
.loading { text-align: center; padding: 60px; color: var(--text-muted); }
.empty-state { text-align: center; padding: 80px 24px; color: var(--text-muted); }
.empty-state svg { margin: 0 auto 16px; opacity: 0.3; }
.empty-state p { font-size: 0.9375rem; }

/* Quote CTA strip */
.quote-strip {
  background: var(--accent);
  padding: 20px 0;
  color: var(--white);
}
.quote-strip-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.quote-strip p { font-size: 1rem; font-weight: 600; }

/* WhatsApp Button */
.wa-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 56px;
  height: 56px;
  background: #25d366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  box-shadow: 0 4px 16px rgba(37,211,102,0.4);
  z-index: 900;
  transition: transform 0.3s;
  text-decoration: none;
}
.wa-btn:hover { transform: scale(1.1); }
.wa-btn svg { width: 28px; height: 28px; }

/* Back to top */
.back-top {
  position: fixed;
  bottom: 96px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  cursor: pointer;
  z-index: 900;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.back-top.show { display: flex; }
.back-top:hover { color: var(--primary); border-color: var(--primary); }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .hero-content { gap: 48px; }
  .inquiry-wrap { grid-template-columns: 1fr; gap: 40px; }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .process-steps::before { display: none; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --header-height: 60px; }
  .section { padding: 64px 0; }
  .section-sm { padding: 40px 0; }
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .hero::after { width: 100%; clip-path: none; opacity: 0.05; }
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .hero h1 { font-size: 2rem; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .grid-2 { grid-template-columns: 1fr; gap: 32px; }
  .grid-3 { grid-template-columns: 1fr; }
  .about-intro-grid { grid-template-columns: 1fr; gap: 40px; }
  .product-detail-grid { grid-template-columns: 1fr; }
  .product-gallery { position: static; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .form-row { grid-template-columns: 1fr; }
  .custom-options-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .quote-strip-inner { flex-direction: column; text-align: center; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .inquiry-form-card { padding: 24px; }
  .page-banner { padding: 56px 0; }
  .cta-banner { padding: 56px 0; }
  .header-actions .btn { display: none; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 100%; justify-content: center; }
  .features-grid { grid-template-columns: 1fr; }
  .industries-grid { grid-template-columns: 1fr 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: 1fr; }
}