/* ==========================================================================
   witflow 威特流 · Design System & Stylesheet
   Inspirations: Awwwards, Land-book, shadcn/ui, Magic UI, Aceternity UI, Coolors
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Natural Warm Palette (Default Light) */
  --bg-main: #FBF9F5;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-solid: #FFFFFF;
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-subtle: #F2EFE9;
  
  --text-main: #1A1918;
  --text-muted: #6B6864;
  --text-subtle: #99958F;
  
  /* Brand Accents */
  --brand-forest: #1A382B;
  --brand-forest-rgb: 26, 56, 43;
  --brand-forest-light: #EBF2EE;
  --brand-amber: #C69248;
  --brand-amber-rgb: 198, 146, 72;
  --brand-amber-light: #FAF2E6;

  /* Borders & Shadows */
  --border-subtle: rgba(26, 25, 24, 0.08);
  --border-focus: rgba(26, 56, 43, 0.28);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 8px 24px rgba(26, 25, 24, 0.06);
  --shadow-lg: 0 16px 40px rgba(26, 25, 24, 0.09);
  --shadow-spotlight: 0 0 40px rgba(198, 146, 72, 0.12);

  /* Radius */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.32s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  /* Dark Tech & Slate Palette */
  --bg-main: #0B0D0C;
  --bg-card: rgba(18, 22, 20, 0.78);
  --bg-card-solid: #151A18;
  --bg-card-hover: rgba(26, 32, 29, 0.9);
  --bg-subtle: #141816;

  --text-main: #F4F6F5;
  --text-muted: #9CA3AF;
  --text-subtle: #6B7280;

  --brand-forest: #34D399;
  --brand-forest-rgb: 52, 211, 153;
  --brand-forest-light: rgba(52, 211, 153, 0.12);
  --brand-amber: #FBBF24;
  --brand-amber-rgb: 251, 191, 36;
  --brand-amber-light: rgba(251, 191, 36, 0.12);

  --border-subtle: rgba(255, 255, 255, 0.09);
  --border-focus: rgba(52, 211, 153, 0.35);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-spotlight: 0 0 45px rgba(52, 211, 153, 0.15);
}

/* --------------------------------------------------------------------------
   2. Base & Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  -webkit-font-smoothing: antialiased;
}

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

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Glassmorphism utility */
.glass {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   3. Navbar (Floating Minimal Dock)
   -------------------------------------------------------------------------- */
.navbar-wrapper {
  position: fixed;
  top: 1.25rem;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: 0 1rem;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 960px;
  height: 56px;
  padding: 0 1.25rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-smooth);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
}

.brand-logo-img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  transition: transform var(--transition-fast), filter var(--transition-smooth);
}

.brand-logo:hover .brand-logo-img {
  transform: rotate(-4deg) scale(1.08);
}

[data-theme="dark"] .brand-logo-img {
  filter: invert(1) hue-rotate(180deg) brightness(1.25) contrast(1.1);
}

.brand-title-group {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}

.logo-text-en {
  font-size: 1.2rem;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.logo-text-zh {
  font-family: 'Noto Serif SC', serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--brand-amber);
  margin-left: 0.1rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--brand-forest);
  box-shadow: 0 0 8px var(--brand-forest);
  margin-left: 0.2rem;
  animation: pulse 2s infinite;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--brand-forest);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.icon-btn:hover {
  background: var(--bg-subtle);
  color: var(--text-main);
}

[data-theme="light"] .moon-icon { display: block; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: block; }

.cta-btn.sm {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background-color: var(--brand-forest);
  color: #FFFFFF;
  box-shadow: 0 2px 10px rgba(var(--brand-forest-rgb), 0.25);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

[data-theme="dark"] .cta-btn.sm {
  color: #0B0D0C;
}

.cta-btn.sm:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(var(--brand-forest-rgb), 0.35);
}

/* --------------------------------------------------------------------------
   4. Hero Section (Awwwards / Land-book Editorial Polish)
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 7rem;
  padding-bottom: 4rem;
  text-align: center;
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
}

/* Hero Brand Emblem */
.hero-brand-emblem {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 2rem;
}

.hero-logo-frame {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.hero-logo-frame:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(var(--brand-amber-rgb), 0.2);
}

.hero-logo-img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  transition: filter var(--transition-smooth);
}

[data-theme="dark"] .hero-logo-img {
  filter: invert(1) hue-rotate(180deg) brightness(1.25) contrast(1.1);
}

.slogan-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: -0.01em;
}

.slogan-en {
  font-family: 'Plus Jakarta Sans', sans-serif;
  color: var(--text-main);
  font-weight: 700;
}

.slogan-divider {
  color: var(--brand-amber);
}

.slogan-zh {
  font-family: 'Noto Serif SC', serif;
  color: var(--brand-forest);
}

/* Pill Badge */
.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background: var(--brand-forest-light);
  border: 1px solid rgba(var(--brand-forest-rgb), 0.18);
  margin-bottom: 2rem;
}

.pulse-beacon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-forest);
  box-shadow: 0 0 10px var(--brand-forest);
  animation: pulse 1.8s infinite;
}

.pill-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-forest);
  letter-spacing: -0.01em;
}

/* Hero Title */
.hero-title {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.title-en {
  font-size: clamp(3.2rem, 8vw, 6.2rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-main);
  line-height: 1;
}

.title-zh {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  font-weight: 900;
  color: var(--brand-amber);
  line-height: 1;
  letter-spacing: 0.02em;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  max-width: 680px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-subtitle strong {
  color: var(--text-main);
  font-weight: 600;
}

/* Hero Action Buttons */
.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.primary-btn {
  background: var(--brand-forest);
  color: #FFFFFF;
  box-shadow: 0 4px 18px rgba(var(--brand-forest-rgb), 0.28);
}

[data-theme="dark"] .primary-btn {
  color: #0B0D0C;
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(var(--brand-forest-rgb), 0.38);
}

.ghost-btn {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.ghost-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-1px);
}

/* Metric Ribbon */
.stats-ribbon {
  display: flex;
  align-items: center;
  justify-content: space-around;
  width: 100%;
  max-width: 860px;
  padding: 1.25rem 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.stat-num {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border-subtle);
}

/* Ambient Background Light */
.ambient-glow {
  position: absolute;
  top: 15%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(circle, rgba(var(--brand-amber-rgb), 0.12) 0%, rgba(var(--brand-forest-rgb), 0.05) 50%, transparent 80%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 1;
}

/* --------------------------------------------------------------------------
   5. Section Header Utility
   -------------------------------------------------------------------------- */
.section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brand-amber);
  margin-bottom: 0.6rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.8rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   6. Bento Grid (Aceternity UI & Magic UI Style)
   -------------------------------------------------------------------------- */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}

.bento-card {
  position: relative;
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.spotlight-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-lg);
}

.bento-card-large {
  grid-column: span 8;
  min-height: 380px;
}

.bento-grid > .bento-card:nth-child(2) {
  grid-column: span 4;
}

.bento-grid > .bento-card:nth-child(3) {
  grid-column: span 4;
}

.bento-card-wide {
  grid-column: span 8;
}

.bento-badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  color: var(--text-muted);
}

.card-icon-box {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  background: var(--brand-forest-light);
  color: var(--brand-forest);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.bento-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.bento-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-pill {
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.code-chip {
  margin-top: auto;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
  color: var(--brand-forest);
  border: 1px dashed var(--border-subtle);
}

.check-list {
  list-style: none;
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.check-list li {
  font-size: 0.85rem;
  color: var(--text-muted);
  position: relative;
  padding-left: 1.25rem;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--brand-forest);
  font-weight: bold;
}

.bento-content-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  width: 100%;
}

.card-action-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.card-action-link:hover {
  background: var(--brand-forest);
  color: #FFFFFF;
  transform: translateX(2px);
}

/* --------------------------------------------------------------------------
   7. Pipeline Section (Mobbin & SaaSFrame Inspired)
   -------------------------------------------------------------------------- */
.pipeline-section {
  background: var(--bg-subtle);
}

.pipeline-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
}

.flow-step {
  display: flex;
  flex-direction: column;
}

.step-marker {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--brand-amber);
  margin-bottom: 0.75rem;
  opacity: 0.85;
}

.step-card {
  padding: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast);
}

.step-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-focus);
}

.step-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   8. Social Matrix & Link Tree (shadcn & HyperUI Inspired)
   -------------------------------------------------------------------------- */
.matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}

.matrix-card {
  padding: 1.75rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
}

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

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.platform-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform-icon.wechat { background: #07C160; color: #FFFFFF; }
.platform-icon.redbook { background: #FF2442; color: #FFFFFF; }
.platform-icon.x-icon { background: #000000; color: #FFFFFF; }
.platform-icon.github { background: #24292E; color: #FFFFFF; }
.platform-icon.jike { background: #FFE411; color: #111111; }

.platform-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  color: var(--text-muted);
}

.platform-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.platform-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.matrix-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.matrix-card:hover .matrix-action-btn {
  background: var(--brand-forest);
  color: #FFFFFF;
}

/* --------------------------------------------------------------------------
   9. Showcase Section
   -------------------------------------------------------------------------- */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.showcase-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-smooth);
}

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

.showcase-thumb {
  height: 180px;
  position: relative;
  background-size: cover;
  background-position: center;
}

.thumb-1 {
  background: linear-gradient(135deg, #1E3A2F 0%, #2D5A46 100%);
}

.thumb-2 {
  background: linear-gradient(135deg, #2D3748 0%, #4A5568 100%);
}

.thumb-3 {
  background: linear-gradient(135deg, #744210 0%, #B7791F 100%);
}

.badge-overlay {
  position: absolute;
  top: 1rem;
  left: 1rem;
  padding: 0.25rem 0.65rem;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.showcase-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.category-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--brand-amber);
  margin-bottom: 0.4rem;
}

.showcase-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.65rem;
  letter-spacing: -0.02em;
  line-height: 1.45;
}

.showcase-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-subtle);
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.75rem;
}

/* --------------------------------------------------------------------------
   10. Contact & Collaboration
   -------------------------------------------------------------------------- */
.contact-container {
  display: flex;
  justify-content: center;
}

.contact-box {
  width: 100%;
  max-width: 820px;
  padding: 3.5rem 2.5rem;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.contact-title {
  font-size: clamp(1.8rem, 3.5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.8rem;
}

.contact-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.65;
}

.contact-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.copy-email-btn {
  background: var(--brand-forest);
  color: #FFFFFF;
}

[data-theme="dark"] .copy-email-btn {
  color: #0B0D0C;
}

.copy-email-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 18px rgba(var(--brand-forest-rgb), 0.35);
}

.contact-footnote {
  font-size: 0.85rem;
  color: var(--text-subtle);
}

/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  padding: 3.5rem 0 2.5rem;
  border-top: 1px solid var(--border-subtle);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-logo {
  margin-bottom: 0.5rem;
}

.footer-slogan {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.vps-info {
  font-size: 0.8rem;
  color: var(--brand-amber);
  font-weight: 600;
}

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1rem;
}

.footer-nav {
  display: flex;
  gap: 1.5rem;
}

.footer-nav a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--brand-forest);
}

.copyright {
  font-size: 0.8rem;
  color: var(--text-subtle);
}

/* --------------------------------------------------------------------------
   12. Modal Dialog (WeChat QR)
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 1;
  transition: opacity var(--transition-smooth);
}

.modal-overlay.hidden {
  display: none;
  opacity: 0;
}

.modal-card {
  position: relative;
  width: 90%;
  max-width: 420px;
  padding: 2.25rem;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-close-btn {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  font-size: 1.8rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--text-main);
}

.modal-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.modal-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* QR Placeholder SVG Visual */
.qr-box {
  display: flex;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.qr-placeholder {
  width: 200px;
  height: 200px;
  border-radius: var(--radius-md);
  background: #FFFFFF;
  border: 8px solid #FFFFFF;
  box-shadow: var(--shadow-md);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: 
    radial-gradient(#1A1918 2px, transparent 2px),
    radial-gradient(#1A1918 2px, #FFFFFF 2px);
  background-size: 16px 16px;
  background-position: 0 0, 8px 8px;
}

.qr-corner {
  position: absolute;
  width: 44px;
  height: 44px;
  border: 6px solid #1A1918;
  background: #FFFFFF;
}

.qr-corner.top-left { top: 6px; left: 6px; }
.qr-corner.top-right { top: 6px; right: 6px; }
.qr-corner.bottom-left { bottom: 6px; left: 6px; }

.qr-corner::after {
  content: "";
  position: absolute;
  top: 6px;
  left: 6px;
  right: 6px;
  bottom: 6px;
  background: #1A1918;
}

.qr-center-logo {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
  z-index: 2;
}

.qr-center-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.modal-copy-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  background: var(--bg-subtle);
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.wechat-id-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.wechat-id-code {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--brand-forest);
}

.copy-sub-btn {
  padding: 0.35rem 0.75rem;
  background: var(--bg-card-solid);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.copy-sub-btn:hover {
  background: var(--brand-forest);
  color: #FFFFFF;
}

/* --------------------------------------------------------------------------
   13. Toast Notification
   -------------------------------------------------------------------------- */
.toast-notification {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-full);
  background: var(--bg-card-solid);
  color: var(--text-main);
  border: 1px solid var(--border-focus);
  box-shadow: var(--shadow-lg);
  z-index: 300;
  font-size: 0.9rem;
  font-weight: 600;
  animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-notification.hidden {
  display: none;
}

.toast-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--brand-forest-light);
  color: var(--brand-forest);
  display: flex;
  align-items: center;
  justify-content: center;
}

@keyframes toastIn {
  from { transform: translateY(16px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* --------------------------------------------------------------------------
   14. Responsive Breakpoints
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .bento-card-large,
  .bento-card-wide,
  .bento-grid > .bento-card:nth-child(2),
  .bento-grid > .bento-card:nth-child(3) {
    grid-column: span 12;
  }

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

  .bento-content-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .stats-ribbon {
    flex-direction: column;
    gap: 1.25rem;
    padding: 1.5rem;
  }

  .stat-divider {
    width: 60%;
    height: 1px;
  }

  .pipeline-flow {
    grid-template-columns: 1fr;
  }

  .contact-actions {
    flex-direction: column;
    width: 100%;
  }

  .contact-actions .btn {
    width: 100%;
  }

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

  .footer-right {
    align-items: center;
  }
}