/* PhotoColors Matcha & Cream Editorial Web System */

:root {
  --bg-primary: #f6f8f5;
  /* Warm Celadon Cream */
  --bg-secondary: #ffffff;
  /* Pure Card White */
  --bg-tertiary: #edf1ec;
  /* Soft Celadon Tint */
  --border-color: rgba(78, 122, 93, 0.08);
  --border-color-hover: rgba(78, 122, 93, 0.18);

  --primary: #41634c;
  /* Matcha Deep Forest */
  --primary-rgb: 65, 99, 76;
  --accent: #87a992;
  /* Soft Celadon Green */
  --accent-light: #e6ede8;
  --text-primary: #19241d;
  /* Off-black Ink */
  --text-secondary: #415045;
  /* Dark Sage */
  --text-muted: #728577;
  /* Muted Celadon */
  --success: #2e7d32;

  --font-sans: "Outfit", "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", sans-serif;
  --font-serif: "Playfair Display", "Noto Serif CJK SC", serif;

  --transition-spring: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fluid: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);

  --radius-xs: 6px;
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 32px;

  --shadow-soft: 0 10px 30px rgba(78, 122, 93, 0.03);
  --shadow-hover: 0 20px 50px rgba(78, 122, 93, 0.08);
  --shadow-floating: 0 30px 60px rgba(78, 122, 93, 0.12);
}

/* Base resets & styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Floating Clean pill-shaped header */
header.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(246, 248, 245, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-fluid);
}

header.site-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-soft);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.logo-link img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 700;
  padding: 6px 0;
  position: relative;
  transition: var(--transition-fluid);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: var(--transition-spring);
}

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

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  background: var(--primary);
  color: #ffffff;
  padding: 8px 20px;
  border-radius: var(--radius-lg);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition-spring);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(65, 99, 76, 0.2);
}

/* Premium Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition-spring);
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  border: 1px solid var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(65, 99, 76, 0.15);
}

.btn-secondary {
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-secondary:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

/* Sections */
.section {
  padding: 120px 0;
}

.section-bg-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

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

.section-header.center {
  text-align: center;
}

.section-subtitle {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.65rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 18px;
  line-height: 1.25;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.65;
}

.section-header.center .section-desc {
  margin: 0 auto;
}

/* ==========================================================================
   LAYOUT A: Homepage Hero - Asymmetrical Three-Column Magazine Layout
   ========================================================================== */
.hero-magazine-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr 1.2fr;
  gap: 40px;
  align-items: stretch;
  padding: 80px 24px 120px 24px;
}

/* Hero Col 1: App details vertical flow */
.hero-meta-column {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--border-color);
}

.hero-spec-item {
  margin-bottom: 24px;
}

.hero-spec-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.hero-spec-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.hero-qr-box {
  background: #ffffff;
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fluid);
  cursor: pointer;
}

.hero-qr-box:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.hero-qr-img {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xs);
}

.hero-qr-txt {
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--text-secondary);
}

/* Hero Col 2: Typographic center column */
.hero-typographic-column {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-right: 20px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: var(--radius-lg);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
}

.hero-editorial-title {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.05em;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.hero-editorial-title span.editorial-highlight {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--primary);
  border-bottom: 2px solid var(--accent);
}

.hero-editorial-desc {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

/* Hero Col 3: Stacked interface overlay column */
.hero-visual-column {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 480px;
}

.editorial-visual-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
}

.stacked-phone-card {
  position: absolute;
  width: 200px;
  aspect-ratio: 0.49;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-floating);
  border: 8px solid #ffffff;
  transition: var(--transition-spring);
}

.stacked-phone-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.stacked-phone-card.card-back {
  left: 10%;
  top: 10%;
  transform: rotate(-8deg) scale(0.95);
  z-index: 1;
  opacity: 0.8;
}

.stacked-phone-card.card-front {
  right: 10%;
  bottom: 5%;
  transform: rotate(4deg) scale(1.05);
  z-index: 2;
}

.stacked-phone-card.card-front:hover {
  transform: translate(-10px, -10px) rotate(0deg) scale(1.08);
  z-index: 3;
}

.stacked-phone-card.card-back:hover {
  transform: translate(10px, -10px) rotate(0deg) scale(1.02);
  z-index: 3;
  opacity: 1;
}

/* Interactive Tabs Section */
.features-container {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 64px;
  align-items: center;
}

.features-selector-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.feature-tab-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 24px 28px;
  border-radius: var(--radius-md);
  text-align: left;
  cursor: pointer;
  transition: var(--transition-spring);
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  box-shadow: var(--shadow-soft);
}

.feature-tab-btn::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background-color: var(--primary);
  opacity: 0;
  transition: var(--transition-fluid);
  border-radius: var(--radius-xs) 0 0 var(--radius-xs);
}

.feature-tab-btn:hover {
  transform: translateY(-3px);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-hover);
}

.feature-tab-btn.active {
  background: var(--bg-tertiary);
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
}

.feature-tab-btn.active::before {
  opacity: 1;
}

.feature-tab-tag {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.feature-tab-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.feature-tab-btn.active .feature-tab-title {
  color: var(--primary);
}

.feature-tab-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Feature Showcase Board */
.feature-showcase-board {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-hover);
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.feature-display-panel {
  position: absolute;
  left: 40px;
  top: 40px;
  width: calc(100% - 80px);
  height: calc(100% - 80px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(20px) scale(0.96);
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.feature-display-panel.active {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.display-phone-frame {
  width: 100%;
  max-width: 200px;
  aspect-ratio: 0.49;
  background-color: #ffffff;
  border: 8px solid var(--text-primary);
  border-radius: 36px;
  overflow: hidden;
  box-shadow: var(--shadow-floating);
  margin-bottom: 24px;
  position: relative;
}

.display-phone-frame::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 16px;
  background: var(--text-primary);
  border-radius: 8px;
  z-index: 10;
}

.display-phone-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.display-panel-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.display-floating-badge {
  background: var(--bg-tertiary);
  padding: 6px 14px;
  border-radius: var(--radius-lg);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  margin-top: 10px;
}

.color-visualizer {
  display: flex;
  gap: 8px;
  margin-top: 20px;
  width: 100%;
}

.color-dot {
  flex: 1;
  height: 36px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: #ffffff;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: var(--transition-spring);
}

.color-dot:hover {
  transform: translateY(-4px);
}

/* Swatch card showcase grid */
.gallery-layout {
  display: flex;
  flex-direction: column;
}

.gallery-scroller {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding-top: 40px;
  padding-bottom: 40px;
}

.premium-mockup-container {
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-soft);
  transition: var(--transition-spring);
}

/* Staggered grid items for premium editorial feel */
@media (min-width: 1025px) {
  .premium-mockup-container:nth-child(odd) {
    transform: translateY(24px);
  }

  .premium-mockup-container:nth-child(even) {
    transform: translateY(-24px);
  }

  .premium-mockup-container:nth-child(odd):hover {
    transform: translateY(12px) scale(1.02) !important;
  }

  .premium-mockup-container:nth-child(even):hover {
    transform: translateY(-36px) scale(1.02) !important;
  }
}

.premium-mockup-container:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--border-color-hover);
}

.phone-mockup-light {
  width: 100%;
  aspect-ratio: 0.62;
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  overflow: hidden;
  border: 1px solid var(--border-color);
  position: relative;
}

.phone-mockup-light img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

.premium-mockup-container:hover .phone-mockup-light img {
  transform: scale(1.08);
}

.mockup-meta {
  margin-top: 20px;
}

.mockup-title {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.mockup-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
}

.mockup-color-dots {
  display: flex;
  gap: 6px;
}

.mockup-color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.05);
  cursor: pointer;
  transition: var(--transition-fluid);
}

.mockup-color-dot:hover {
  transform: scale(1.2);
}

/* Call to action - Modern Split Layout */
.download-card-wrapper {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  background: linear-gradient(135deg, #2b3d32 0%, #1e2b22 100%);
  border-radius: var(--radius-xl);
  padding: 60px 80px;
  color: #ffffff;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  position: relative;
  overflow: hidden;
  align-items: center;
}

.download-card-wrapper::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 80%;
  height: 150%;
  background: radial-gradient(circle, rgba(163, 201, 168, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.download-info-panel {
  display: flex;
  flex-direction: column;
  z-index: 1;
}

.download-subtitle {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.download-title {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 400;
  line-height: 1.25;
  margin-bottom: 20px;
  color: #ffffff;
}

.download-desc {
  font-size: 0.98rem;
  line-height: 1.6;
  opacity: 0.85;
  margin-bottom: 28px;
  color: #e2ede5;
}

.download-highlights {
  list-style: none;
  padding: 0;
  margin: 0 0 36px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.download-highlights li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: #d1dfd5;
}

.highlight-icon {
  width: 18px;
  height: 18px;
  fill: var(--accent);
  flex-shrink: 0;
}

.download-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-download-primary {
  background: #ffffff;
  color: #2b3d32;
  border: 1px solid #ffffff;
  border-radius: var(--radius-lg);
  padding: 14px 28px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  transition: var(--transition-spring);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-download-primary:hover {
  background: #f4f7f5;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.btn-download-secondary {
  background: transparent;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-lg);
  padding: 14px 28px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  transition: var(--transition-spring);
}

.btn-download-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: #ffffff;
  transform: translateY(-2px);
}

/* 右侧视觉动效卡片 */
.download-visual-panel {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1;
}

.visual-card-showcase {
  background: #ffffff;
  border-radius: var(--radius-lg);
  width: 280px;
  padding: 12px;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.25);
  transform: rotate(3deg);
  transition: var(--transition-spring);
}

.visual-card-showcase:hover {
  transform: rotate(0deg) scale(1.03);
}

.showcase-photo-container {
  height: 180px;
  background-image: url('6.png');
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-md);
  position: relative;
}

.showcase-exif {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.5);
  color: #ffffff;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  backdrop-filter: blur(2px);
}

.showcase-color-bar {
  display: flex;
  margin-top: 10px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  height: 36px;
}

.showcase-color-bar .color-block {
  flex: 1;
  height: 100%;
}

.showcase-info {
  margin-top: 12px;
  padding: 4px 8px;
  color: #2b3d32;
}

.showcase-location {
  font-size: 0.8rem;
  font-weight: 700;
  opacity: 0.8;
  margin-bottom: 4px;
}

.showcase-quote {
  font-size: 0.85rem;
  font-family: var(--font-serif);
  color: var(--text-secondary);
  font-style: italic;
}

/* 悬浮标签 */
.floating-badge {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 30px;
  padding: 8px 18px;
  font-size: 0.82rem;
  font-weight: 700;
  color: #ffffff;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  animation: float-badge 4s ease-in-out infinite;
}

.badge-1 {
  top: 10%;
  left: 5%;
  animation-delay: 0s;
}

.badge-2 {
  bottom: 15%;
  right: 5%;
  animation-delay: 2s;
}

@keyframes float-badge {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

/* 适配移动端 */
@media (max-width: 992px) {
  .download-card-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px;
  }
  .download-title {
    font-size: 2.2rem;
  }
  .download-visual-panel {
    margin-top: 20px;
  }
  .visual-card-showcase {
    width: 260px;
  }
}

/* Homepage Minimal Timeline */
.minimal-timeline {
  position: relative;
  max-width: 800px;
  margin: 60px auto 0 auto;
  padding-left: 40px;
  border-left: 2px solid var(--border-color);
}

.timeline-block {
  position: relative;
  margin-bottom: 48px;
}

.timeline-block:last-child {
  margin-bottom: 0;
}

.timeline-pin {
  position: absolute;
  left: -47px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px var(--bg-primary);
  transition: var(--transition-fluid);
}

.timeline-block:hover .timeline-pin {
  background: var(--primary);
  transform: scale(1.2);
}

.timeline-year {
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.timeline-version-name {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--text-primary);
  margin-bottom: 12px;
  font-weight: 700;
}

.timeline-log-list {
  list-style: none;
}

.timeline-log-list li {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-secondary);
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
}

.timeline-log-list li::before {
  content: "•";
  color: var(--accent);
  position: absolute;
  left: 0;
  font-weight: 900;
  top: -1px;
}

/* ==========================================================================
   LAYOUT B: Guide Page - Asymmetrical Left-Sticky Split Sidebar Grid
   ========================================================================== */
.guide-split-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 60px;
  align-items: flex-start;
  padding: 60px 0;
}

.guide-sticky-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.guide-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.guide-nav-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 700;
  transition: var(--transition-fluid);
  border: 1px solid transparent;
}

.guide-nav-item a:hover {
  background: var(--bg-tertiary);
  color: var(--primary);
}

.guide-nav-item.active a {
  background: var(--primary);
  color: #ffffff;
}

.guide-progress-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.guide-quick-download {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.guide-quick-download h4 {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.guide-quick-download p {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.4;
}

/* Guide content cards */
.guide-content-stream {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.guide-card-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-soft);
  scroll-margin-top: 100px;
}

.guide-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.guide-step-num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-style: italic;
  color: var(--accent);
}

.guide-card-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
}

.guide-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

.guide-card-grid.reverse {
  grid-template-columns: 1fr 1fr;
}

.guide-card-text {
  font-size: 0.96rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

.guide-card-text h4 {
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-top: 16px;
  margin-bottom: 8px;
}

.guide-card-text ul {
  margin-left: 20px;
  margin-top: 10px;
}

.guide-card-text li {
  margin-bottom: 6px;
}

.guide-card-media {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-soft);
  aspect-ratio: 1.35;
}

.guide-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================================================
   LAYOUT C: History Page - Horizontal Timeline Track Scroll
   ========================================================================== */
.history-horizontal-track {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  overflow-x: auto;
  padding: 60px 0 80px 0;
  scrollbar-width: thin;
}

.history-scroll-container {
  display: flex;
  padding: 0 calc((100vw - 1200px) / 2 + 24px);
  gap: 40px;
}

/* Small screen adjustment helper */
@media (max-width: 1200px) {
  .history-scroll-container {
    padding: 0 24px;
  }
}

.history-version-card {
  flex: 0 0 420px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-spring);
}

.history-version-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.history-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.history-badge-new {
  background: var(--accent-light);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: var(--radius-lg);
}

.history-badge-archive {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: var(--radius-lg);
}

.history-card-ver {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.history-card-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.history-card-desc {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.history-card-logs {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 30px;
}

.history-card-logs li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-left: 14px;
  position: relative;
  line-height: 1.4;
}

.history-card-logs li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--primary);
}

.history-card-btn {
  margin-top: auto;
  width: 100%;
  padding: 10px 0;
  font-size: 0.88rem;
}

/* ==========================================================================
   LAYOUT D: About Page - Bento Grid Storyboard
   ========================================================================== */
.about-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: minmax(180px, auto);
  gap: 28px;
  margin-top: 40px;
}

.bento-tile {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: var(--transition-spring);
}

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

.bento-span-2-horiz {
  grid-column: span 2;
}

.bento-span-2-vert {
  grid-row: span 2;
  justify-content: flex-start;
}

.bento-span-3 {
  grid-column: span 3;
}

.bento-tile-eyebrow {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.bento-tile-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.bento-tile-content {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.bento-tile.hero-bento {
  background: var(--bg-tertiary);
  border-color: var(--border-color-hover);
}

.bento-tile.hero-bento h2 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-style: italic;
  font-weight: 400;
  line-height: 1.2;
  color: var(--primary);
  margin-bottom: 16px;
}

.bento-stat-num {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-fluid);
}

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

.modal-overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(25, 36, 29, 0.4);
  backdrop-filter: blur(8px);
}

.modal-container {
  position: relative;
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 32px;
  overflow-y: auto;
  z-index: 2002;
  transform: scale(0.95);
  transition: var(--transition-spring);
  box-shadow: var(--shadow-floating);
}

.modal.active .modal-container {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.modal-content {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.modal-content h3 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-top: 16px;
  margin-bottom: 8px;
}

.modal-content p {
  margin-bottom: 12px;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(50px);
  background: var(--text-primary);
  color: #ffffff;
  padding: 10px 24px;
  border-radius: var(--radius-lg);
  font-size: 0.88rem;
  font-weight: 700;
  box-shadow: var(--shadow-floating);
  z-index: 9999;
  opacity: 0;
  transition: var(--transition-spring);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* General scroll animated fade */
[data-fade] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1), transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

[data-fade].visible {
  opacity: 1;
  transform: translateY(0);
}

/* Studio Layout Footer */
footer.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 80px 0 40px 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr 0.9fr 1.1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-info .footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 800;
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.footer-info p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-column h4 {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--text-muted);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

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

.footer-column li {
  margin-bottom: 12px;
}

.footer-column a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fluid);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  color: var(--text-muted);
  text-decoration: none;
}

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

.footer-column .btn-primary,
.footer-column .btn-primary:hover {
  color: #ffffff;
}

.footer-column .btn-primary svg {
  fill: #ffffff;
}

/* Horizontal Scroll Timeline for history.html */
.timeline-scroll-wrapper {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 80px 0;
  background: var(--bg-primary);
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
  cursor: grab;
}

.timeline-scroll-wrapper::-webkit-scrollbar {
  height: 6px;
}

.timeline-scroll-wrapper::-webkit-scrollbar-track {
  background: transparent;
}

.timeline-scroll-wrapper::-webkit-scrollbar-thumb {
  background: var(--border-color-hover);
  border-radius: 3px;
}

.timeline-scroll-container {
  display: inline-flex;
  gap: 32px;
  padding: 0 40px;
  min-width: 100%;
}

.timeline-intro-card {
  width: 380px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px;
  background: transparent;
  border-right: 1px dashed var(--border-color-hover);
  margin-right: 16px;
}

.timeline-intro-tag {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--primary);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.timeline-intro-card h2 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 20px;
  font-weight: 400;
}

.timeline-intro-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 30px;
}

.timeline-scroll-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.timeline-scroll-hint svg {
  animation: scrollPulse 1.5s infinite;
}

@keyframes scrollPulse {
  0% {
    transform: translateX(0);
    opacity: 0.6;
  }

  50% {
    transform: translateX(6px);
    opacity: 1;
  }

  100% {
    transform: translateX(0);
    opacity: 0.6;
  }
}

.timeline-scroll-card {
  width: 420px;
  flex-shrink: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  transition: var(--transition-spring);
  position: relative;
}

.timeline-scroll-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-color-hover);
}

.timeline-scroll-card.active-version {
  border: 2px solid var(--primary);
}

.timeline-scroll-card.future-version {
  background: var(--bg-tertiary);
  border-style: dashed;
}

.timeline-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.timeline-version-tag {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
}

.active-version .timeline-version-tag {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.timeline-date {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
}

.timeline-version-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: 16px;
  font-weight: 700;
}

.timeline-version-desc {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.timeline-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.timeline-features li {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-secondary);
  position: relative;
  padding-left: 20px;
  margin-bottom: 12px;
}

.timeline-features li::before {
  content: "•";
  color: var(--accent);
  position: absolute;
  left: 0;
  font-weight: 900;
  font-size: 1.2rem;
  top: -2px;
}

.timeline-btn {
  width: 100%;
  padding: 12px;
  font-size: 0.88rem;
}

/* Bento Grid Layout for experience.html */
.about-main,
.experience-main {
  padding: 80px 0;
  background: var(--bg-primary);
}

.experience-hero-section {
  padding-top: 140px;
  padding-bottom: 40px;
  background: var(--bg-primary);
}

.about-hero-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.bento-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-soft);
  transition: var(--transition-spring);
  display: flex;
  flex-direction: column;
}

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

.bento-badge {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--accent-light);
  padding: 6px 12px;
  border-radius: var(--radius-xs);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.bento-hero-main h1 {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 400;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.bento-hero-main p {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.bento-hero-meta {
  background: var(--bg-tertiary);
  justify-content: space-between;
}

.meta-item {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
  margin-bottom: 16px;
}

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

.meta-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.meta-val {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}

.about-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bento-span-2 {
  grid-column: span 2;
}

.bento-span-3 {
  grid-column: span 3;
}

.bento-icon {
  color: var(--primary);
  margin-bottom: 24px;
}

.bento-card h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.bento-card h4 {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.bento-card p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.bento-card p:last-child {
  margin-bottom: 0;
}

.bento-values {
  padding: 50px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 32px;
}

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

.value-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
}

.value-item h4 {
  margin-bottom: 12px;
}

.value-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

@media (max-width: 1024px) {
  .section {
    padding: 60px 0;
  }

  .experience-main {
    padding: 40px 0;
  }

  .experience-hero-section {
    padding-top: 40px;
  }

  .hero-magazine-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    padding-top: 10px;
    padding-bottom: 60px;
  }

  .hero-meta-column {
    order: 3;
  }

  .hero-typographic-column {
    order: 1;
    text-align: center;
    padding-right: 0;
  }

  .hero-eyebrow {
    align-self: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .theme-switch-container {
    justify-content: center;
  }

  .hero-visual-column {
    order: 2;
  }

  .features-container {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .guide-split-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .guide-sticky-sidebar {
    position: static;
  }

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

  .about-bento-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
  }

  .bento-span-2,
  .bento-span-3 {
    grid-column: span 1;
    grid-row: span 1;
  }

  .values-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

@media (max-width: 768px) {
  .guide-card-grid,
  .guide-card-grid.reverse {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .guide-card-text {
    order: 1;
  }

  .guide-card-media {
    order: 2;
  }

  .gallery-scroller {
    grid-template-columns: 1fr;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .timeline-scroll-wrapper {
    padding: 40px 0;
    overflow-x: hidden;
  }

  .timeline-scroll-container {
    display: flex;
    flex-direction: column;
    gap: 32px;
    padding: 0 24px;
    min-width: unset;
    width: 100%;
  }

  .timeline-intro-card {
    width: 100%;
    border-right: none;
    border-bottom: 1px dashed var(--border-color-hover);
    padding: 24px 0 32px 0;
    margin-right: 0;
  }

  .timeline-scroll-hint {
    display: none !important;
  }

  .timeline-scroll-card {
    width: 100%;
    padding: 24px;
  }
}

/* ==========================================================================
   COLOR LAB - Interactive Color Extraction Experience
   ========================================================================== */
.color-lab-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  margin-top: 40px;
  align-items: flex-start;
}

.upload-dropzone {
  width: 100%;
  min-height: 300px;
  border: 2px dashed var(--border-color-hover);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-spring);
  position: relative;
  overflow: hidden;
  padding: 32px;
  text-align: center;
}

.upload-dropzone.dragover {
  border-color: var(--primary);
  background: var(--bg-tertiary);
  transform: scale(0.99);
}

.upload-dropzone:hover {
  border-color: var(--primary);
  background: var(--bg-tertiary);
}

.lab-source-image {
  width: 100%;
  max-height: 280px;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.lab-controls {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-md);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-label {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.control-input {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.95rem;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition-fluid);
}

.control-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(65, 99, 76, 0.15);
}

.palette-card-wrapper {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-hover);
  color: #142118;
}

.card-image-box {
  width: 100%;
  aspect-ratio: 1.5;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.card-img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-style: italic;
  opacity: 0.45;
  letter-spacing: 0.05em;
}

.card-image-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-swatch-list {
  display: flex;
  height: 54px;
  margin-top: 16px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.swatch-item {
  flex: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
  cursor: pointer;
  transition: flex 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
}

.swatch-item:hover {
  flex: 1.6;
}

.swatch-hex {
  font-family: "Courier New", monospace;
  font-size: 0.7rem;
  font-weight: 700;
  color: #ffffff;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.swatch-item:hover .swatch-hex {
  opacity: 1;
}

.card-info-box {
  margin-top: 20px;
  border-top: 1px dashed var(--border-color);
  padding-top: 16px;
}

.card-stamp-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 700;
}

.card-location {
  color: var(--primary);
}

.card-caption {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-style: italic;
  line-height: 1.5;
  margin-top: 12px;
  color: #1a3022;
}

.card-brand-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
  font-size: 0.72rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding-top: 12px;
}

.card-brand-logo {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--primary);
}

/* Color Lab Media Queries */
@media (max-width: 1024px) {
  .color-lab-grid {
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .color-lab-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ==========================================================================
   CORE CAPABILITIES - 3-Column Grid Layout & Pure CSS Mockup Card Styles
   ========================================================================== */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.capability-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: var(--transition-fluid);
  display: flex;
  flex-direction: column;
}

.capability-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-floating);
  border-color: var(--border-color-hover);
}

.card-visual-header {
  background: var(--bg-secondary);
  padding: 32px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-grow: 0;
}

.capability-card .css-card-mockup {
  margin: 0;
  width: 100%;
}

.capability-card .card-content {
  padding: 28px 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.capability-tag {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
  display: inline-block;
  text-transform: uppercase;
}

.capability-title {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}

.capability-desc {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}

@media (max-width: 1024px) {
  .capabilities-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.css-card-mockup {
  width: 100%;
  max-width: 320px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-soft);
  color: #142118;
  text-align: left;
}

/* Polaroid Mock styles */
.polaroid-mock .mockup-img-gradient {
  width: 100%;
  aspect-ratio: 1.5;
  background-image: url('5.png');
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.05);
}

.mockup-exif-overlay {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(25, 36, 29, 0.6);
  color: #ffffff;
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: monospace;
}

.polaroid-mock .color-visualizer {
  display: flex;
  margin-top: 12px;
  border-radius: var(--radius-xs);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.polaroid-mock .color-dot {
  flex: 1;
  height: 36px;
  font-size: 0;
  cursor: pointer;
  transition: flex 0.2s ease;
}

.polaroid-mock .color-dot:hover {
  flex: 1.5;
}

.polaroid-mock .mockup-info {
  margin-top: 12px;
  border-top: 1px dashed var(--border-color);
  padding-top: 10px;
}

.polaroid-mock .mockup-stamp-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 700;
}

.polaroid-mock .mockup-location {
  color: var(--primary);
}

.polaroid-mock .mockup-caption {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.95rem;
  color: #1a3022;
  margin-top: 8px;
  line-height: 1.4;
}

/* Convert Mock styles */
.convert-dashboard {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
}

.convert-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.convert-title-text {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.convert-status-pill {
  font-size: 0.65rem;
  background: var(--accent-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: var(--radius-lg);
  font-weight: 700;
}

.convert-file-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.convert-file-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px;
  position: relative;
}

.file-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.file-size-text {
  color: var(--text-muted);
}

.file-progress-bar {
  width: 100%;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 6px;
}

.file-progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: var(--radius-lg);
}

.file-format-badge {
  font-size: 0.65rem;
  color: var(--accent);
  font-weight: 800;
  text-align: right;
}

.file-format-badge.loading {
  color: var(--text-muted);
  animation: convertPulse 1.2s infinite;
}

@keyframes convertPulse {
  0% { opacity: 0.5; }
  50% { opacity: 1; }
  100% { opacity: 0.5; }
}

.convert-arrow-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-top: 1px dashed var(--border-color);
  padding-top: 10px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 700;
}

.convert-arrow-flow svg {
  color: var(--primary);
}

.format-tag {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-color);
}

/* Text Mock styles */
.quote-editor-ui {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.quote-tag-row {
  display: flex;
  gap: 8px;
}

.quote-style-tag {
  font-size: 0.7rem;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: var(--radius-lg);
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fluid);
}

.quote-style-tag.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.quote-textarea {
  background: var(--bg-secondary);
  border: 1px dashed var(--border-color-hover);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.quote-text-preview {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: #1a3022;
  line-height: 1.4;
  margin-bottom: 8px;
}

.quote-author-preview {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
}

.quote-action-btn {
  background: var(--primary);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 10px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fluid);
}

.quote-action-btn:hover {
  background: #324e3c;
}

/* 对比评测区 Comparison Section */
.comparison-container {
  margin-top: 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th, 
.comparison-table td {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
}

.comparison-table th {
  background: rgba(65, 99, 76, 0.05);
  font-weight: 700;
  color: var(--text-primary);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-feature-col {
  width: 30%;
  font-weight: 700;
  color: var(--text-primary);
}

.comparison-photocolors-col {
  width: 35%;
  background: rgba(65, 99, 76, 0.02);
  color: var(--primary);
  font-weight: 600;
}

.comparison-other-col {
  width: 35%;
  color: var(--text-secondary);
}

.comparison-status-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
}

.status-tag-positive {
  background: rgba(65, 99, 76, 0.1);
  color: var(--primary);
}

.status-tag-negative {
  background: rgba(220, 53, 69, 0.1);
  color: #dc3545;
}

/* 常见问题 Accordion FAQ */
.faq-container {
  max-width: 800px;
  margin: 40px auto 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-fluid);
}

.faq-item:hover {
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-soft);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-question-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  fill: var(--text-secondary);
}

.faq-item.active .faq-question-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease-out;
  padding: 0 24px;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
  border-top: 0 solid var(--border-color);
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 24px 24px 24px;
  border-top-width: 1px;
}

/* 画廊页面 styles */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
  margin-top: 40px;
}

.gallery-palette-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: var(--transition-spring);
  display: flex;
  flex-direction: column;
}

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

.gallery-photo-box {
  height: 200px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.gallery-palette-bar {
  display: flex;
  height: 50px;
}

.gallery-palette-swatch {
  flex: 1;
  height: 100%;
  cursor: pointer;
  position: relative;
  transition: transform 0.2s ease;
}

.gallery-palette-swatch:hover {
  transform: scaleY(1.1);
  z-index: 10;
}

.gallery-palette-swatch::after {
  content: attr(data-color);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-5px);
  background: rgba(0, 0, 0, 0.8);
  color: #ffffff;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  white-space: nowrap;
}

.gallery-palette-swatch:hover::after {
  opacity: 1;
}

.gallery-card-info {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.gallery-card-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.gallery-card-desc {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.gallery-card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
}

.btn-gallery-action {
  font-size: 0.85rem;
  padding: 8px 16px;
  border-radius: 20px;
  background: rgba(65, 99, 76, 0.08);
  color: var(--primary);
  border: none;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fluid);
  text-decoration: none;
}

.btn-gallery-action:hover {
  background: var(--primary);
  color: #ffffff;
}

.gallery-card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* 用户评价区域 (Reviews/Testimonials) */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 40px;
}

@media (min-width: 768px) {
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.review-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fluid);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

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

.review-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.review-stars {
  display: flex;
  gap: 4px;
  color: #fbbf24;
}

.review-stars svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.review-quote-icon {
  color: rgba(65, 99, 76, 0.15);
}

.review-quote-icon svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.review-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.review-text strong {
  color: var(--primary);
  font-weight: 700;
  background: rgba(65, 99, 76, 0.06);
  padding: 2px 4px;
  border-radius: 4px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(65, 99, 76, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--primary);
  font-size: 1.1rem;
  border: 1px solid rgba(65, 99, 76, 0.15);
}

.review-meta {
  display: flex;
  flex-direction: column;
}

.review-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.review-role {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* 颜色卡片填充主题 (Color card fills matching PhotoColors branding) */
.review-card.theme-red {
  background-color: #ffffff;
  border-color: rgba(185, 89, 89, 0.12);
}
.review-card.theme-red:hover {
  border-color: #b95959;
  box-shadow: 0 10px 25px -5px rgba(185, 89, 89, 0.1);
}
.review-card.theme-red .review-avatar {
  background-color: rgba(185, 89, 89, 0.08);
  color: #b95959;
  border-color: rgba(185, 89, 89, 0.15);
}
.review-card.theme-red .review-text strong {
  color: #b95959;
  background-color: rgba(185, 89, 89, 0.06);
}

.review-card.theme-blue {
  background-color: #ffffff;
  border-color: rgba(72, 164, 201, 0.12);
}
.review-card.theme-blue:hover {
  border-color: #48a4c9;
  box-shadow: 0 10px 25px -5px rgba(72, 164, 201, 0.1);
}
.review-card.theme-blue .review-avatar {
  background-color: rgba(72, 164, 201, 0.08);
  color: #48a4c9;
  border-color: rgba(72, 164, 201, 0.15);
}
.review-card.theme-blue .review-text strong {
  color: #48a4c9;
  background-color: rgba(72, 164, 201, 0.06);
}

.review-card.theme-amber {
  background-color: #ffffff;
  border-color: rgba(232, 158, 71, 0.12);
}
.review-card.theme-amber:hover {
  border-color: #e89e47;
  box-shadow: 0 10px 25px -5px rgba(232, 158, 71, 0.1);
}
.review-card.theme-amber .review-avatar {
  background-color: rgba(232, 158, 71, 0.08);
  color: #e89e47;
  border-color: rgba(232, 158, 71, 0.15);
}
.review-card.theme-amber .review-text strong {
  color: #e89e47;
  background-color: rgba(232, 158, 71, 0.06);
}

.review-card.theme-green {
  background-color: #ffffff;
  border-color: rgba(61, 108, 84, 0.12);
}
.review-card.theme-green:hover {
  border-color: #3d6c54;
  box-shadow: 0 10px 25px -5px rgba(61, 108, 84, 0.1);
}
.review-card.theme-green .review-avatar {
  background-color: rgba(61, 108, 84, 0.08);
  color: #3d6c54;
  border-color: rgba(61, 108, 84, 0.15);
}
.review-card.theme-green .review-text strong {
  color: #3d6c54;
  background-color: rgba(61, 108, 84, 0.06);
}

/* Responsive Site Header for Tablets and Mobile Devices */
@media (max-width: 860px) {
  header.site-header {
    background: rgba(246, 248, 245, 0.98);
  }
  
  .nav-container {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    row-gap: 12px;
    column-gap: 16px;
    height: auto;
    padding-top: 14px;
    padding-bottom: 12px;
  }
  
  .logo-link {
    grid-column: 1;
    grid-row: 1;
    font-size: 1.1rem;
    gap: 8px;
  }
  
  .logo-link img {
    width: 28px;
    height: 28px;
  }
  
  .nav-actions {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    justify-content: flex-end;
  }
  
  .nav-cta {
    padding: 6px 14px;
    font-size: 0.8rem;
  }
  
  nav {
    grid-column: 1 / span 2;
    grid-row: 2;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  
  nav::-webkit-scrollbar {
    display: none;
  }
  
  .nav-menu {
    display: flex;
    gap: 20px;
    width: max-content;
    padding: 4px 4px 8px 4px;
  }
  
  .nav-menu li a {
    white-space: nowrap;
    font-size: 0.88rem;
    padding: 4px 0;
  }
}