/* ============================================
   DENIM B2B — Earth Tone Editorial Style
   大地色系 · 杂志编辑风 · 极简留白
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,300;9..144,400;9..144,500;9..144,700;9..144,900&family=DM+Sans:wght@300;400;500;700&display=swap');

:root {
  /* 配色 — Earth Tones */
  --earth-bg: #f5f1eb;
  --earth-bg-warm: #ede7dd;
  --earth-card: #faf8f4;
  --earth-text: #2d2519;
  --earth-text-soft: #5a4e3e;
  --earth-text-muted: #8a7d6b;
  --earth-accent: #8b6f47;
  --earth-accent-dark: #6d5836;
  --earth-border: #d9d0c4;
  --earth-border-light: #e8e1d6;
  --earth-shadow: rgba(45, 37, 25, 0.08);
  --earth-hover: #c4a875;

  /* 字体 */
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, sans-serif;

  /* 间距 */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* 过渡 */
  --transition: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--earth-bg);
  color: var(--earth-text);
  line-height: 1.6;
  font-weight: 300;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }

/* ===== 噪点纹理 ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(245, 241, 235, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--earth-border-light);
  transition: var(--transition);
}

.header-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--earth-text);
}

.logo span { color: var(--earth-accent); }

.nav {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--earth-text-soft);
  letter-spacing: 0.02em;
  position: relative;
  transition: var(--transition);
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--earth-accent);
  transition: width 0.3s ease;
}

.nav a:hover { color: var(--earth-text); }
.nav a:hover::after { width: 100%; }

.nav a.active { color: var(--earth-text); font-weight: 500; }
.nav a.active::after { width: 100%; }

.header-cta {
  font-size: 0.875rem;
  padding: 0.6rem 1.4rem;
  background: var(--earth-text);
  color: var(--earth-bg);
  border-radius: 0;
  transition: var(--transition);
  letter-spacing: 0.04em;
  border: none;
  cursor: pointer;
}

.header-cta:hover {
  background: var(--earth-accent-dark);
  transform: translateY(-1px);
}

/* ===== HERO ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--earth-bg-warm);
}

.hero-image {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.85) sepia(0.15) saturate(0.9);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(245,241,235,0.3) 0%, rgba(245,241,235,0.1) 50%, rgba(245,241,235,0.7) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

.hero-content > * {
  opacity: 0;
  transform: translateY(30px);
  animation: heroFadeIn 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero-content > *:nth-child(1) { animation-delay: 0.2s; }
.hero-content > *:nth-child(2) { animation-delay: 0.4s; }
.hero-content > *:nth-child(3) { animation-delay: 0.6s; }
.hero-content > *:nth-child(4) { animation-delay: 0.8s; }

@keyframes heroFadeIn {
  to { opacity: 1; transform: translateY(0); }
}

.hero-eyebrow {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--earth-accent);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--earth-text);
  margin-bottom: 1.5rem;
  max-width: 800px;
}

.hero h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--earth-accent);
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--earth-text-soft);
  max-width: 500px;
  margin-bottom: 2.5rem;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.btn-primary {
  padding: 1rem 2.5rem;
  background: var(--earth-text);
  color: var(--earth-bg);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary:hover {
  background: var(--earth-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--earth-shadow);
}

.btn-secondary {
  padding: 1rem 2.5rem;
  background: transparent;
  color: var(--earth-text);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border: 1px solid var(--earth-text);
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: var(--earth-text);
  color: var(--earth-bg);
}

/* ===== TRUST BAR ===== */
.trust-bar {
  background: var(--earth-text);
  color: var(--earth-bg);
  padding: 1.5rem 2rem;
  overflow: hidden;
}

.trust-track {
  display: flex;
  gap: 4rem;
  white-space: nowrap;
  animation: scroll 30s linear infinite;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.7;
}

.trust-item::before {
  content: '◆';
  color: var(--earth-hover);
}

@keyframes scroll {
  to { transform: translateX(-50%); }
}

/* ===== SECTION COMMON ===== */
.section {
  position: relative;
  z-index: 2;
  padding: var(--space-xl) 2rem;
}

.section-inner {
  max-width: 1440px;
  margin: 0 auto;
}

.section-eyebrow {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--earth-accent);
  margin-bottom: 1rem;
  font-weight: 500;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--earth-text);
  margin-bottom: 1rem;
}

.section-title em { font-style: italic; color: var(--earth-accent); }

.section-desc {
  font-size: 1.0625rem;
  color: var(--earth-text-soft);
  max-width: 600px;
  margin-bottom: 4rem;
}

/* ===== FILTER BAR ===== */
.filter-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.filter-btn {
  padding: 0.6rem 1.4rem;
  background: transparent;
  border: 1px solid var(--earth-border);
  color: var(--earth-text-soft);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-body);
}

.filter-btn:hover { border-color: var(--earth-accent); color: var(--earth-text); }
.filter-btn.active { background: var(--earth-text); color: var(--earth-bg); border-color: var(--earth-text); }

/* ===== PRODUCT GRID ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem 1.5rem;
}

.product-card {
  background: var(--earth-card);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  border: none;
}

.product-card:hover {
  transform: translateY(-3px);
}

.product-card:hover .product-name {
  color: var(--earth-accent);
}

/* ===== Product Image with Hover Swap ===== */
.product-image {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  background: var(--earth-bg-warm);
}

.product-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.4s ease;
}

.product-image img.img-hover {
  opacity: 0;
}

.product-card:hover .product-image img.img-main {
  opacity: 0;
}

.product-card:hover .product-image img.img-hover {
  opacity: 1;
}

/* Image count indicator */
.image-count {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  display: flex;
  gap: 3px;
  padding: 0.4rem 0.7rem;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(8px);
  border-radius: 100px;
  opacity: 0;
  transform: translateY(5px);
  transition: all 0.3s ease;
}

.product-card:hover .image-count {
  opacity: 1;
  transform: translateY(0);
}

.image-count-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--earth-border);
}

.image-count-dot.active {
  background: var(--earth-text);
}

.image-count-num {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--earth-text-muted);
  margin-left: 2px;
  letter-spacing: 0.05em;
}

/* Badges */
.product-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  padding: 0.3rem 0.75rem;
  background: var(--earth-text);
  color: var(--earth-bg);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  z-index: 2;
}

.product-badge.sale { background: var(--earth-accent); }

.product-badge.new {
  background: var(--earth-accent-dark);
}

/* Quick view on hover */
.quick-view {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
  color: white;
  text-align: center;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 2;
}

.product-card:hover .quick-view {
  transform: translateY(0);
}

/* ===== Product Info ===== */
.product-info {
  padding: 1.2rem 0.2rem 0.5rem;
}

.product-fit {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--earth-text-muted);
  margin-bottom: 0.35rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.product-fit .sku {
  font-family: 'DM Mono', monospace;
  font-size: 0.6rem;
  opacity: 0.7;
}

.product-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--earth-text);
  margin-bottom: 0.25rem;
  transition: color var(--transition);
  line-height: 1.3;
}

.product-color {
  font-size: 0.8rem;
  color: var(--earth-text-soft);
  margin-bottom: 0.8rem;
  font-weight: 300;
}

.product-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--earth-border-light);
}

.product-inquire {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--earth-bg);
  background: var(--earth-accent);
  border: 1px solid var(--earth-accent);
  border-radius: 0;
  padding: 0.55rem 1.1rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.product-inquire:hover {
  background: var(--earth-accent-dark);
  border-color: var(--earth-accent-dark);
  color: var(--earth-bg);
  gap: 0.55rem;
}

.product-moq {
  font-size: 0.7rem;
  color: var(--earth-text-muted);
  letter-spacing: 0.04em;
  font-weight: 300;
  text-align: right;
  line-height: 1.3;
}
.inquire-btn {
  background: transparent;
  border: 1px solid var(--earth-accent);
  padding: 0.45rem 1.1rem;
  cursor: pointer;
  letter-spacing: 0.03em;
  transition: var(--transition);
  white-space: nowrap;
}

.inquire-btn:hover {
  background: var(--earth-accent);
  color: var(--earth-bg);
}

/* ===== PRODUCT DETAIL MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(45, 37, 25, 0.6);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.modal-overlay.active { opacity: 1; pointer-events: auto; }

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  z-index: 201;
  width: 92%;
  max-width: 1200px;
  max-height: 92vh;
  background: var(--earth-bg);
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal.active { opacity: 1; pointer-events: auto; transform: translate(-50%, -50%) scale(1); }

.modal-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 10;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--earth-card);
  border: 1px solid var(--earth-border);
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--earth-text);
  transition: var(--transition);
}

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

.modal-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.modal-gallery {
  padding: 2rem;
  background: var(--earth-bg-warm);
}

.modal-main-image {
  aspect-ratio: 3/4;
  overflow: hidden;
  margin-bottom: 1rem;
  background: var(--earth-card);
}

.modal-main-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-thumbnails {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: 0.5rem;
}

.modal-thumb {
  aspect-ratio: 1;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  background: var(--earth-card);
}

.modal-thumb img { width: 100%; height: 100%; object-fit: cover; }
.modal-thumb:hover { border-color: var(--earth-accent); }
.modal-thumb.active { border-color: var(--earth-text); }

.modal-info {
  padding: 3rem 2.5rem;
  display: flex;
  flex-direction: column;
}

.modal-info .product-fit {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  margin-bottom: 0.6rem;
}

.modal-info h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: 0.3rem;
  color: var(--earth-text);
}

.modal-info .product-color-large {
  font-size: 1rem;
  color: var(--earth-text-soft);
  margin-bottom: 2rem;
}

.modal-price-row {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--earth-border-light);
}

.modal-price {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--earth-text);
}

.modal-price .original {
  text-decoration: line-through;
  color: var(--earth-text-muted);
  font-size: 1.1rem;
  margin-right: 0.5rem;
}

.modal-moq {
  font-size: 0.9rem;
  color: var(--earth-text-soft);
  font-weight: 400;
  letter-spacing: 0.02em;
}

/* Specs table */
.specs {
  margin-bottom: 2rem;
}

.specs h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--earth-text-muted);
  margin-bottom: 1rem;
}

.spec-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--earth-text-muted);
  margin-bottom: 0.2rem;
}

.spec-value {
  font-size: 0.9rem;
  color: var(--earth-text);
  font-weight: 400;
}

/* Size selector */
.size-section {
  margin-bottom: 2rem;
}

.size-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.size-chip {
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--earth-border);
  background: transparent;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-body);
  color: var(--earth-text-soft);
}

.size-chip:hover { border-color: var(--earth-accent); }
.size-chip.selected { background: var(--earth-text); color: var(--earth-bg); border-color: var(--earth-text); }

/* Sustainability badges */
.sustainability-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.sustainability-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.8rem;
  background: var(--earth-bg-warm);
  border: 1px solid var(--earth-border-light);
  font-size: 0.75rem;
  color: var(--earth-text-soft);
}

.sustainability-tag::before { content: '🌿'; font-size: 0.8rem; }

/* Inquiry button */
.modal-actions {
  display: flex;
  gap: 1rem;
  margin-top: auto;
}

/* ===== FEATURE STRIP ===== */
.feature-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--earth-border);
  border-bottom: 1px solid var(--earth-border);
}

.feature-item {
  padding: 2.5rem 2rem;
  text-align: center;
  border-right: 1px solid var(--earth-border-light);
}

.feature-item:last-child { border-right: none; }

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 0.8rem;
  color: var(--earth-accent);
  line-height: 1;
}
.feature-icon svg {
  width: 32px;
  height: 32px;
  display: block;
}

.feature-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: 0.4rem;
  color: var(--earth-text);
}

.feature-desc {
  font-size: 0.825rem;
  color: var(--earth-text-muted);
}

/* ===== SUSTAINABILITY SECTION ===== */
.sustain-section {
  background: var(--earth-text);
  color: var(--earth-bg);
  padding: var(--space-xl) 2rem;
}

.sustain-section .section-eyebrow { color: var(--earth-hover); }
.sustain-section .section-title { color: var(--earth-bg); }
.sustain-section .section-title em { color: var(--earth-hover); }
.sustain-section .section-desc { color: rgba(245, 241, 235, 0.6); }

.sustain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  margin-top: 4rem;
}

.sustain-card {
  border-top: 1px solid rgba(245, 241, 235, 0.15);
  padding-top: 2rem;
}

.sustain-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 300;
  color: var(--earth-hover);
  margin-bottom: 0.5rem;
  line-height: 1;
}

.sustain-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: rgba(245, 241, 235, 0.5);
  margin-bottom: 1rem;
}

.sustain-text {
  font-size: 0.9rem;
  color: rgba(245, 241, 235, 0.7);
  line-height: 1.7;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--earth-bg-warm);
  padding: 4rem 2rem 2rem;
  border-top: 1px solid var(--earth-border);
}

.footer-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--earth-text-muted);
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--earth-text-muted);
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--earth-text-soft);
  margin-bottom: 0.6rem;
  transition: var(--transition);
}

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

.footer-bottom {
  max-width: 1440px;
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid var(--earth-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--earth-text-muted);
}

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 90;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--earth-card);
  border: 1px solid var(--earth-border);
  color: var(--earth-text-soft);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
}

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

.back-to-top:hover {
  background: var(--earth-accent);
  color: var(--earth-bg);
  border-color: var(--earth-accent);
}

/* ===== ANIMATIONS ===== */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .product-grid { grid-template-columns: repeat(3, 1fr); gap: 1.8rem 1.2rem; }
  .feature-strip { grid-template-columns: repeat(2, 1fr); }
  .sustain-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .modal-content { grid-template-columns: 1fr; }
  .modal-gallery { padding: 1.5rem; }
  .modal-info { padding: 2rem 1.5rem; }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .hero { min-height: 600px; }
  .section { padding: 4rem 1.5rem; }
  .product-grid { grid-template-columns: repeat(3, 1fr); gap: 1.5rem 1rem; }
  .feature-strip { grid-template-columns: 1fr; }
  .feature-item { border-right: none; border-bottom: 1px solid var(--earth-border-light); }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; }
  .spec-list { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 1.2rem 0.8rem; }
  .hero h1 { font-size: 2.5rem; }
}