/* ============================================
   降頻人生實驗室 - Design System
   Theme: Dark/Light System Monitor Style
   ============================================ */

/* CSS Variables - Theme System */
:root {
  /* Dark Theme (Default) */
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --bg-card: #0a0a0a;

  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;

  --border-color: #333333;
  --border-strong: #FFD93D;

  --accent-primary: #FFD93D;
  --accent-secondary: #FFC107;
  --accent-pink: #FF6B9D;
  --accent-cyan: #00D9FF;
  --accent-green: #4ADE80;

  /* Card Icon Colors */
  --icon-red: #FF6B6B;
  --icon-yellow: #FFD93D;
  --icon-green: #4ADE80;

  /* Status Colors */
  --status-normal: #4ade80;
  --status-warning: #fbbf24;
  --status-critical: #fb923c;
  --status-danger: #ef4444;

  /* Semantic Colors for Content */
  --color-highlight: #FFD93D;
  /* 強調文字 */
  --color-warning-text: #ff6b6b;
  /* 警告文字 */
  --color-success-text: #4ade80;
  /* 成功/推薦文字 */
  --color-info-text: #00D9FF;
  /* 資訊文字 */
  --color-price: #ffd166;
  /* 價格強調 */

  /* Table Colors */
  --table-header-bg: #1a1a1a;
  --table-header-text: #a0a0a0;
  --table-row-bg: #0f0f0f;
  --table-row-alt-bg: #141414;
  --table-border: #333333;

  /* Button & CTA Colors */
  --cta-primary-bg: #FFD93D;
  --cta-primary-text: #0a0a0a;
  --cta-secondary-bg: transparent;
  --cta-secondary-text: #FFD93D;
  --cta-secondary-border: #FFD93D;

  /* UI */
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Typography */
  --font-sans: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
  --font-handwriting: 'Ma Shan Zheng', 'ZCOOL KuaiLe', cursive;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Light Theme - 降頻溫和模式 (Warm Oatmeal Style) */
[data-theme="light"] {
  --bg-primary: #FAF9F6;
  /* 溫潤燕麥白 */
  --bg-secondary: #F3F1E9;
  /* 淺暖灰 */
  --bg-tertiary: #EBE8DF;
  /* 中暖灰 */
  --bg-card: #FDFDFB;
  /* 舒適白 */

  --text-primary: #2D2A26;
  /* 深暖炭黑 */
  --text-secondary: #5C5852;
  /* 暖灰字 */
  --text-muted: #8E8981;

  --border-color: #E2DFD5;
  /* 柔和邊框 */
  --border-strong: #2D2A26;

  --accent-primary: #2D2A26;
  --accent-secondary: #4A453E;

  /* Icon Colors - 調整為符合溫和模式的濃度 */
  --icon-red: #B54545;
  --icon-yellow: #C28E2E;
  --icon-green: #4D7C50;

  /* Status Colors */
  --status-normal: #4D7C50;
  --status-warning: #C28E2E;
  --status-critical: #D97706;
  --status-danger: #B54545;

  /* Semantic Colors */
  --color-highlight: #C28E2E;
  --color-warning-text: #B54545;
  --color-success-text: #4D7C50;
  --color-info-text: #3E6B89;
  --color-price: #C28E2E;

  /* Table Colors */
  --table-header-bg: #F3F1E9;
  --table-header-text: #2D2A26;
  --table-row-bg: #FDFDFB;
  --table-row-alt-bg: #FAF9F6;
  --table-border: #E2DFD5;

  /* Button & CTA Colors */
  --cta-primary-bg: #D4A373;
  /* 質感焦糖棕，取代刺激的橘色 */
  --cta-primary-text: #ffffff;
  --cta-secondary-bg: transparent;
  --cta-secondary-text: #2D2A26;
  --cta-secondary-border: #2D2A26;

  --shadow: 0 4px 24px rgba(45, 42, 38, 0.08);
}

/* ============================================
   Base Styles
   ============================================ */

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

ul {
  list-style: none;
}

/* ============================================
   Typography
   ============================================ */

h1,
h2,
h3,
h4 {
  font-weight: 900;
  line-height: 1.2;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--accent-primary);
  color: var(--bg-primary);
  margin-bottom: var(--space-lg);
}

.section-title {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  margin-bottom: var(--space-xl);
}

.comment {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

/* ============================================
   Layout
   ============================================ */

.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

/* ============================================
   Navigation
   ============================================ */

.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
}

.logo-icon {
  font-size: 1.25rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  padding: var(--space-xs) var(--space-sm);
  cursor: pointer;
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--border-strong);
}

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

[data-theme="dark"] .theme-icon-dark {
  display: inline;
}

[data-theme="light"] .theme-icon-light {
  display: inline;
}

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

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-fast);
}

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

  .mobile-menu-btn {
    display: flex;
  }
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-primary);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
}

.mobile-nav-link {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(80px + var(--space-2xl)) var(--space-lg) var(--space-2xl);
  position: relative;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (max-width: 968px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--space-xl);
}

.title-line {
  display: block;
}

.title-line.highlight {
  position: relative;
  display: inline-block;
}

.title-line.highlight::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 8px;
  background-color: var(--accent-primary);
  opacity: 0.3;
  z-index: -1;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 480px;
}

@media (max-width: 968px) {
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
}

/* CTA Buttons */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  padding: var(--space-md) var(--space-xl);
  border: 3px solid var(--border-strong);
  background-color: var(--accent-primary);
  color: var(--bg-primary);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.cta-button:hover {
  transform: translate(-4px, -4px);
  box-shadow: 4px 4px 0 var(--border-strong);
}

.cta-button.secondary {
  background-color: transparent;
  color: var(--text-primary);
}

.cta-button.secondary:hover {
  background-color: var(--accent-primary);
  color: var(--bg-primary);
}

.cta-button.full-width {
  width: 100%;
  justify-content: center;
}

/* System Panel */
.system-panel {
  background-color: var(--bg-card);
  border: 3px solid var(--border-strong);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  border-bottom: 2px solid var(--border-color);
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.panel-status {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--status-normal);
}

.panel-content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.panel-footer {
  padding: var(--space-md);
  border-top: 2px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.panel-footer.warning {
  background-color: rgba(251, 191, 36, 0.1);
  color: var(--status-warning);
}

/* Meters */
.meter {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.meter-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.meter-value {
  font-weight: 700;
  color: var(--text-primary);
}

.meter-bar {
  height: 12px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  width: var(--fill-width);
  transition: width 1s ease-out;
}

.meter-fill.normal {
  background-color: var(--status-normal);
}

.meter-fill.warning {
  background-color: var(--status-warning);
}

.meter-fill.critical {
  background-color: var(--status-critical);
}

.meter-fill.danger {
  background-color: var(--status-danger);
}

/* Scroll Hint */
.scroll-hint {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.scroll-arrow {
  animation: bounce 2s infinite;
}

@keyframes bounce {

  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }

  40% {
    transform: translateY(8px);
  }

  60% {
    transform: translateY(4px);
  }
}

/* Blink Animation */
.blink {
  animation: blink 1s infinite;
}

@keyframes blink {

  0%,
  50% {
    opacity: 1;
  }

  51%,
  100% {
    opacity: 0;
  }
}

/* ============================================
   Worldview Section
   ============================================ */

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

/* Code Block */
.code-block {
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
  background-color: var(--bg-card);
  border: 3px solid var(--border-strong);
}

.code-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-bottom: 2px solid var(--border-color);
}

.code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.code-dot.red {
  background-color: #ef4444;
}

.code-dot.yellow {
  background-color: #fbbf24;
}

.code-dot.green {
  background-color: #4ade80;
}

.code-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: auto;
}

.code-content {
  padding: var(--space-lg);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.8;
  overflow-x: auto;
}

.code-content .keyword {
  color: #c084fc;
}

.code-content .string {
  color: #4ade80;
}

.code-content .comment {
  color: var(--text-muted);
}

/* Symptom Grid */
.symptom-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.symptom-card {
  background-color: var(--bg-card);
  border: 3px solid var(--border-strong);
  padding: var(--space-xl);
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.symptom-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 4px 4px 0 var(--border-strong);
}

.symptom-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.symptom-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.symptom-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--status-danger);
  background-color: rgba(239, 68, 68, 0.1);
  padding: var(--space-xs) var(--space-sm);
  display: inline-block;
  margin-bottom: var(--space-md);
}

.symptom-solution {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ============================================
   Diagnostic Section
   ============================================ */

.diagnostic {
  background-color: var(--bg-primary);
}

.diagnostic-panel {
  max-width: 900px;
  margin: 0 auto;
  background-color: var(--bg-card);
  border: 3px solid var(--border-strong);
}

.diagnostic-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl);
}

@media (max-width: 768px) {
  .diagnostic-content {
    grid-template-columns: 1fr;
  }
}

.diagnostic-title {
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: var(--space-md);
}

.diagnostic-desc {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.diagnostic-list {
  margin-bottom: var(--space-xl);
}

.diagnostic-list li {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.arrow {
  color: var(--accent-primary);
  font-weight: 700;
}

.diagnostic-note {
  margin-top: var(--space-md);
}

/* Terminal */
.terminal {
  background-color: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  height: 100%;
  min-height: 200px;
}

.terminal-header {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--border-color);
}

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.terminal-content {
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 2;
  color: var(--text-secondary);
}

.prompt {
  color: var(--status-normal);
  margin-right: var(--space-sm);
}

/* ============================================
   Tools Section
   ============================================ */

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

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.tool-card {
  background-color: var(--bg-card);
  border: 3px solid var(--border-strong);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  padding-top: var(--space-2xl);
  /* 留空間給頂部裝飾點 */
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--icon-red);
  box-shadow: 16px 0 0 var(--icon-yellow), 32px 0 0 var(--icon-green);
}

.tool-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 4px 4px 0 var(--border-strong);
}

.tool-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  border: 2px solid currentColor;
}

.tool-icon.red {
  color: var(--status-danger);
}

.tool-icon.yellow {
  color: var(--status-warning);
}

.tool-icon.green {
  color: var(--status-normal);
}

.tool-name {
  font-size: 1.25rem;
  font-weight: 900;
  margin-bottom: var(--space-xs);
}

.tool-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.tool-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.tool-value {
  font-size: 0.875rem;
  padding: var(--space-md);
  background-color: rgba(251, 191, 36, 0.1);
  border-left: 3px solid var(--status-warning);
  margin-bottom: var(--space-lg);
}

.value-label {
  font-weight: 700;
  color: var(--status-warning);
}

.tool-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  transition: gap var(--transition-fast);
}

.tool-link:hover {
  gap: var(--space-md);
}

/* ============================================
   Philosophy Section
   ============================================ */

.philosophy {
  background-color: var(--bg-primary);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.philosophy-item {
  padding: var(--space-xl);
  border: 1px solid var(--border-color);
  transition: border-color var(--transition-fast);
}

.philosophy-item:hover {
  border-color: var(--border-strong);
}

.philosophy-number {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: var(--space-sm);
}

.philosophy-name {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.philosophy-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* ============================================
   Subscribe Section
   ============================================ */

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

.subscribe-panel {
  max-width: 900px;
  margin: 0 auto;
  background-color: var(--bg-card);
  border: 3px solid var(--border-strong);
}

.subscribe-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl);
}

@media (max-width: 768px) {
  .subscribe-content {
    grid-template-columns: 1fr;
  }
}

.subscribe-title {
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: var(--space-sm);
}

.subscribe-desc {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.subscribe-list {
  margin-bottom: var(--space-lg);
}

.subscribe-list li {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

/* Form */
.subscribe-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.form-input {
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: var(--space-md);
  background-color: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--border-strong);
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* Social */
.social-channels {
  margin-top: var(--space-xl);
}

.social-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: var(--space-sm);
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--border-color);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.social-link:hover {
  border-color: var(--border-strong);
  background-color: var(--accent-primary);
}

.social-link:hover svg {
  color: var(--bg-primary);
}

.social-link svg {
  width: 20px;
  height: 20px;
  transition: color var(--transition-fast);
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.footer-logo {
  font-weight: 900;
  font-size: 1.125rem;
}

.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-slogan {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.footer-copyright {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ============================================
   Animations
   ============================================ */

/* Meter fill animation on load */
.meter-fill {
  width: 0;
}

.meter-fill.animate {
  width: var(--fill-width);
}

/* Card entrance animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

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

.symptom-card,
.tool-card,
.philosophy-item {
  opacity: 0;
  transform: translateY(20px);
}

.symptom-card.visible,
.tool-card.visible,
.philosophy-item.visible {
  animation: fadeInUp 0.6s ease forwards;
}

/* Stagger animation */
.symptom-card:nth-child(1).visible,
.tool-card:nth-child(1).visible,
.philosophy-item:nth-child(1).visible {
  animation-delay: 0s;
}

.symptom-card:nth-child(2).visible,
.tool-card:nth-child(2).visible,
.philosophy-item:nth-child(2).visible {
  animation-delay: 0.1s;
}

.symptom-card:nth-child(3).visible,
.tool-card:nth-child(3).visible,
.philosophy-item:nth-child(3).visible {
  animation-delay: 0.2s;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .code-content {
    font-size: 0.75rem;
  }
}

/* ============================================
   Hero & Terminal Styles
   ============================================ */

.hero-brand .brand-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--status-normal);
  background-color: rgba(74, 222, 128, 0.1);
  padding: 2px 8px;
  border: 1px solid var(--status-normal);
  margin-bottom: var(--space-md);
}

.terminal-style {
  background-color: #000;
  border: 1px solid var(--border-color);
  padding: var(--space-lg);
  font-family: var(--font-mono);
  border-left: 4px solid var(--accent-primary);
  margin-bottom: var(--space-2xl);
}

.terminal-prompt {
  color: var(--status-normal);
  margin-bottom: 4px;
}

.terminal-output {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.code-shell {
  background-color: #050505;
  border: 3px solid var(--border-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.shell-header {
  background-color: var(--bg-tertiary);
  padding: 10px 15px;
  display: flex;
  align-items: center;
  border-bottom: 2px solid var(--border-strong);
}

.dots {
  display: flex;
  gap: 6px;
  margin-right: 15px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--border-color);
}

.dot:nth-child(1) {
  background-color: #ff5f56;
}

.dot:nth-child(2) {
  background-color: #ffbd2e;
}

.dot:nth-child(3) {
  background-color: #27c93f;
}

.shell-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.shell-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  color: #4ade80;
  min-height: 180px;
}

/* ============================================
   Mission Section
   ============================================ */

.mission {
  background-color: var(--bg-secondary);
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-2xl);
}

.mission-item h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  position: relative;
  padding-bottom: var(--space-sm);
}

.mission-item h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 3px;
  background-color: var(--accent-primary);
}

.mission-item p {
  color: var(--text-secondary);
}

/* ============================================
   Tool Grid & Filter
   ============================================ */

.tool-filter {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  flex-wrap: wrap;
}

.filter-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 6px 16px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  transition: all var(--transition-fast);
}

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

.tool-card {
  display: flex;
  flex-direction: column;
  position: relative;
  border-radius: var(--radius-sm);
}

.tool-card.active-tool {
  border-color: var(--status-normal);
}

.tool-badge.status {
  background-color: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 0.7rem;
}

.tool-stats {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: auto;
  margin-bottom: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--bg-tertiary);
}

.cta-button.small {
  padding: 8px 16px;
  font-size: 0.875rem;
  border-width: 2px;
}

/* ============================================
   How It Works (Process)
   ============================================ */

.how-it-works {
  background-color: var(--bg-primary);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}

.process-card {
  padding: var(--space-xl);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  position: relative;
}

.process-step {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 900;
  color: var(--bg-tertiary);
  position: absolute;
  top: 10px;
  right: 20px;
  line-height: 1;
  z-index: 1;
}

.process-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 2;
}

.process-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  position: relative;
  z-index: 2;
}

.process-footer {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  padding: var(--space-xl);
  background-color: var(--bg-secondary);
  border: 2px dashed var(--border-color);
}

/* ============================================
   Collab Section
   ============================================ */

.collab-panel {
  max-width: 1000px;
  margin: 0 auto;
  background-color: var(--bg-card);
  border: 3px solid var(--border-strong);
}

.collab-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  padding: var(--space-2xl);
}

@media (max-width: 868px) {
  .collab-content {
    grid-template-columns: 1fr;
  }
}

.collab-title {
  font-size: 1.75rem;
  margin-bottom: var(--space-lg);
}

.collab-benefits {
  margin-top: var(--space-xl);
}

.collab-benefits li {
  margin-bottom: var(--space-md);
  display: flex;
  gap: 12px;
  color: var(--text-secondary);
}

.collab-form-wrapper textarea {
  width: 100%;
  margin-bottom: var(--space-md);
  resize: none;
}

/* ============================================
   Animations & Responsive
   ============================================ */

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.25rem;
  }

  .collab-content {
    padding: var(--space-lg);
  }
}

.tool-card {
  transition: transform 0.2s ease;
}

.tool-card:hover {
  transform: translateY(-5px);
}

/* ============================================
   Hero Updates
   ============================================ */

.hero-brand {
  margin-bottom: var(--space-xl);
}

.brand-name {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.brand-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hero-note {
  margin-bottom: var(--space-2xl);
  padding: var(--space-lg);
  border-left: 3px solid var(--border-color);
  color: var(--text-secondary);
}

.hero-note strong {
  color: var(--text-primary);
}

.hero-ctas {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: flex-start;
}

@media (max-width: 968px) {
  .hero-ctas {
    align-items: center;
  }
}

/* ============================================
   Resonance Section
   ============================================ */

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

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-top: calc(var(--space-xl) * -1);
}

.resonance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

.resonance-card {
  background-color: var(--bg-card);
  border: 2px solid var(--border-color);
  padding: var(--space-xl);
  text-align: center;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.resonance-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
}

.resonance-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: var(--space-md);
}

.resonance-card p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.resonance-conclusion {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.conclusion-text {
  font-size: 1.5rem;
  font-weight: 700;
}

.conclusion-text strong {
  display: block;
  font-size: 2rem;
}

.key-insight {
  max-width: 600px;
  margin: 0 auto;
  background-color: var(--bg-card);
  border: 3px solid var(--border-strong);
  padding: var(--space-2xl);
  text-align: center;
}

.insight-text {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.insight-text strong {
  color: var(--status-warning);
}

.insight-follow {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* ============================================
   Worldview Section Updates
   ============================================ */

.system-table {
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
  border: 3px solid var(--border-strong);
}

.table-row {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  border-bottom: 1px solid var(--border-color);
}

.table-row:last-child {
  border-bottom: none;
}

.table-row.header {
  background-color: var(--accent-primary);
  color: var(--bg-primary);
  font-weight: 700;
}

.table-cell {
  padding: var(--space-md) var(--space-lg);
}

.table-cell.code {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--status-warning);
}

.table-row.header .table-cell {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.worldview-conclusion {
  text-align: center;
  margin-bottom: var(--space-3xl);
  font-size: 1.25rem;
}

.worldview-conclusion strong {
  color: var(--status-warning);
}

.core-statement {
  max-width: 600px;
  margin: 0 auto;
}

.statement-box {
  background-color: var(--bg-card);
  border: 3px solid var(--border-strong);
  padding: var(--space-2xl);
  text-align: center;
}

.statement-text {
  font-size: 1.5rem;
  font-weight: 900;
}

.statement-text strong {
  display: block;
  margin-top: var(--space-sm);
}

/* ============================================
   Tools Section Updates
   ============================================ */

.tool-badge {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.tool-name {
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: var(--space-sm);
}

.tool-tagline {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: var(--space-lg);
}

.tool-tagline.coming-soon {
  color: var(--status-warning);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.tool-features {
  margin-bottom: var(--space-xl);
  flex-grow: 1;
}

.tool-features li {
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  font-size: 0.9375rem;
}

.tool-note {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: auto;
}

.tool-card.featured {
  border-color: var(--status-warning);
  position: relative;
}

.tool-card.featured::before {
  content: '推薦';
  position: absolute;
  top: -12px;
  right: var(--space-lg);
  background-color: var(--status-warning);
  color: #000;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: var(--space-xs) var(--space-sm);
}

/* ============================================
   About Section
   ============================================ */

.about {
  background-color: var(--bg-primary);
}

.about-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
  }
}

.about-text p {
  margin-bottom: var(--space-lg);
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.about-intro {
  font-size: 1.5rem !important;
  color: var(--text-primary) !important;
}

.about-intro strong {
  font-size: 2rem;
}

.about-insight {
  font-size: 1.25rem !important;
  color: var(--text-primary) !important;
  padding: var(--space-lg);
  border-left: 3px solid var(--border-strong);
  background-color: var(--bg-secondary);
}

.about-purpose strong {
  color: var(--text-primary);
}

.quote-box {
  background-color: var(--accent-primary);
  color: var(--bg-primary);
  padding: var(--space-2xl);
  text-align: center;
}

.quote-text {
  font-size: 1.5rem;
  font-weight: 900;
  line-height: 1.4;
}

/* ============================================
   Subscribe Section Updates
   ============================================ */

.subscribe-note {
  margin-top: var(--space-md);
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: center;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.social-link {
  width: 100%;
  height: auto;
  padding: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  border: 2px solid var(--border-color);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.social-link:hover {
  border-color: var(--border-strong);
  background-color: var(--bg-tertiary);
}

.social-icon {
  font-size: 1.5rem;
}

.social-name {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
}

.social-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: auto;
}

/* ============================================
   Additional Animations
   ============================================ */

.resonance-card {
  opacity: 0;
  transform: translateY(20px);
}

.resonance-card.visible {
  animation: fadeInUp 0.6s ease forwards;
}

.resonance-card:nth-child(1).visible {
  animation-delay: 0s;
}

.resonance-card:nth-child(2).visible {
  animation-delay: 0.1s;
}

.resonance-card:nth-child(3).visible {
  animation-delay: 0.15s;
}

.resonance-card:nth-child(4).visible {
  animation-delay: 0.2s;
}

.resonance-card:nth-child(5).visible {
  animation-delay: 0.25s;
}