/**
 * AI 新伴 (AI NewMate) - 官网一期核心样式表
 * 零外部依赖 / 纯原生 CSS / 支持桌面与手机端精细适配
 * 色彩基调: 青绿 #087F7B, 深绿蓝 #182B3A, 暖白底色 #F8FAFA
 * DECISION: docs/decisions/brand-and-tech/20261019-visual-and-typography-refinement.md
 */

/* ==========================================================================
   1. CSS Reset & Design Tokens
   ========================================================================== */
:root {
  /* Brand Identity Colors */
  --color-primary: #087F7B;
  --color-primary-hover: #066562;
  --color-primary-active: #044E4C;
  --color-primary-light: #EBF7F6;
  --color-primary-tint: #D4EFEF;
  --color-primary-border: #9DD8D5;
  --color-primary-glow: rgba(8, 127, 123, 0.18);
  --color-primary-glow-subtle: rgba(8, 127, 123, 0.06);

  --color-navy: #182B3A;
  --color-navy-dark: #0F1C26;
  --color-navy-light: #253F54;
  --color-navy-surface: #1E3447;
  --color-navy-glow: rgba(24, 43, 58, 0.12);
  --color-glow-blue: rgba(27, 108, 176, 0.12);

  /* Neutral Spectrum */
  --color-bg: #F8FAFA;
  --color-surface: #FFFFFF;
  --color-surface-subtle: #F1F5F5;
  --color-surface-alt: #E8ECEF;

  --color-text-title: #0F1C26;
  --color-text-main: #273646;
  --color-text-muted: #5A6D7C;
  --color-text-light: #8799A5;

  --color-border-subtle: #E3E9ED;
  --color-border-medium: #CBD6DD;
  --color-border-strong: #9AAEB9;

  /* Functional Status */
  --color-success: #0D825E;
  --color-success-bg: #E8F7F1;
  --color-success-border: #B6E5D3;
  --color-accent: #C77B08;
  --color-accent-bg: #FDF5E8;
  --color-info: #1B6CB0;
  --color-info-bg: #E9F2FA;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-mono: "Cascadia Code", "Fira Code", Consolas, "SFMono-Regular", Menlo, Courier, monospace;

  /* Layout & Geometry */
  --container-max: 1200px;
  --container-wide: 1280px;
  --header-height: 68px;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(24, 43, 58, 0.04);
  --shadow-sm: 0 2px 6px rgba(24, 43, 58, 0.06);
  --shadow-md: 0 6px 18px rgba(24, 43, 58, 0.08);
  --shadow-lg: 0 14px 34px rgba(24, 43, 58, 0.1);
  --shadow-card-hover: 0 12px 30px rgba(8, 127, 123, 0.14), 0 2px 8px rgba(24, 43, 58, 0.04);
  --shadow-glow: 0 0 28px rgba(8, 127, 123, 0.16);
  --shadow-elevated: 0 12px 32px rgba(24, 43, 58, 0.08), 0 2px 6px rgba(24, 43, 58, 0.04);

  /* Transitions */
  --transition-fast: 160ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 240ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

[hidden] { display: none !important; }

.demo-evidence summary { color: var(--color-primary); font-weight: 600; cursor: pointer; }
.demo-evidence p { max-width: 40rem; margin-top: .65rem; font-size: .85rem; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  background-image: 
    radial-gradient(ellipse 90% 45% at 50% 0%, rgba(8, 127, 123, 0.09) 0%, transparent 70%),
    radial-gradient(ellipse 60% 30% at 95% 20%, rgba(27, 108, 176, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse 70% 35% at 5% 60%, rgba(8, 127, 123, 0.05) 0%, transparent 60%),
    linear-gradient(to right, rgba(24, 43, 58, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(24, 43, 58, 0.035) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 36px 36px, 36px 36px;
  background-position: 0 0, 0 0, 0 0, 0 0, 0 0;
  color: var(--color-text-main);
  line-height: 1.7;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ==========================================================================
   2. Accessibility & Global Elements
   ========================================================================== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1.5rem;
  background: var(--color-navy);
  color: #FFFFFF;
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--transition-fast);
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--color-primary);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-wide {
  max-width: var(--container-wide);
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-title);
  line-height: 1.3;
  font-weight: 700;
}

h1 {
  font-size: clamp(2.1rem, 4vw + 1rem, 3.4rem);
  letter-spacing: -0.025em;
}

h2 {
  font-size: clamp(1.7rem, 2.5vw + 0.8rem, 2.4rem);
  letter-spacing: -0.02em;
}

h3 {
  font-size: clamp(1.2rem, 1.5vw + 0.5rem, 1.45rem);
}

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

/* Section Header Structure */
.section {
  padding: 5.5rem 0;
  position: relative;
  overflow: hidden;
}

.section-alt {
  background-color: #FFFFFF;
  background-image: 
    radial-gradient(ellipse 60% 50% at 100% 0%, rgba(8, 127, 123, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse 60% 50% at 0% 100%, rgba(24, 43, 58, 0.04) 0%, transparent 50%),
    linear-gradient(to right, rgba(24, 43, 58, 0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(24, 43, 58, 0.025) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 36px 36px, 36px 36px;
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

/* Ambient Lighting & Mesh Backdrops */
.ambient-glow-hero {
  position: absolute;
  top: -160px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(circle, rgba(8, 127, 123, 0.16) 0%, rgba(24, 43, 58, 0.06) 45%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
}

.ambient-spotlight {
  position: absolute;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(8, 127, 123, 0.10) 0%, rgba(24, 43, 58, 0.03) 50%, transparent 70%);
  filter: blur(50px);
  pointer-events: none;
  z-index: 0;
}

/* Kicker Badges (Engineering Micro-Tags) */
.kicker-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-border);
  padding: 0.28rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.1rem;
  box-shadow: 0 1px 3px rgba(8, 127, 123, 0.08);
}

.kicker-pulse-dot {
  width: 7px;
  height: 7px;
  background-color: var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(8, 127, 123, 0.7);
  animation: pulse-glow 2s infinite cubic-bezier(0.4, 0, 0.6, 1);
}

@keyframes pulse-glow {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(8, 127, 123, 0.6);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 6px rgba(8, 127, 123, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(8, 127, 123, 0);
  }
}

.text-gradient-teal {
  background: linear-gradient(135deg, #087F7B 0%, #182B3A 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tech-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--color-navy);
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xs);
  padding: 0.15rem 0.5rem;
}

/* Card Gleam & Precision Borders */
.card-gleam {
  position: relative;
  overflow: hidden;
}

.card-gleam::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 5%, var(--color-primary-border) 40%, var(--color-primary) 50%, var(--color-primary-border) 60%, transparent 95%);
  opacity: 0.65;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.card-gleam:hover::before {
  opacity: 1;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
  position: relative;
  z-index: 1;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border: 1px solid var(--color-primary-tint);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.section-tag::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 50%;
}

.section-title {
  margin-bottom: 1.1rem;
}

.section-description {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.75rem 1.45rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(8, 127, 123, 0.25);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(8, 127, 123, 0.3);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-navy);
  border: 1px solid var(--color-border-medium);
}

.btn-secondary:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-navy-light);
  color: var(--color-navy-dark);
}

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

.btn-outline-primary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
}

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.88rem;
}

/* ==========================================================================
   3. Site Navigation & Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(248, 250, 250, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
  z-index: 900;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  border-color: var(--color-border-medium);
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-identity {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--color-navy);
  text-decoration: none;
}

.brand-identity:hover {
  color: var(--color-navy);
}

.brand-logo-mark {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}

.brand-text-group {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.18rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-navy);
  letter-spacing: -0.02em;
}

.brand-en-sub {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  color: var(--color-text-main);
  font-size: 0.94rem;
  font-weight: 500;
  padding: 0.35rem 0.2rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-primary);
}

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

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

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

/* Mobile Hamburger */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  color: var(--color-navy);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.hamburger-icon {
  width: 22px;
  height: 22px;
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 28, 38, 0.45);
  backdrop-filter: blur(4px);
  z-index: 850;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.mobile-drawer.is-open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-drawer-content {
  background: var(--color-surface);
  border-bottom: 2px solid var(--color-primary);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: var(--shadow-lg);
  transform: translateY(-10px);
  transition: transform var(--transition-fast);
}

.mobile-drawer.is-open .mobile-drawer-content {
  transform: translateY(0);
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-nav-links a {
  display: block;
  padding: 0.75rem 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-navy);
  border-radius: var(--radius-sm);
  border-bottom: 1px solid var(--color-border-subtle);
}

.mobile-nav-links a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* ==========================================================================
   4. Hero Section & Workspace Simulation
   ========================================================================== */
.hero-section {
  padding: 4.5rem 0 5.5rem 0;
  position: relative;
  overflow: hidden;
}

.hero-header-wrap {
  text-align: center;
  max-width: 900px;
  margin: 0 auto 3.5rem auto;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.4rem 1.1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-xs);
}

.hero-pill-badge .pill-badge-label {
  font-size: 0.8rem;
  font-weight: 700;
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
}

.hero-pill-badge .pill-badge-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-navy);
}

.hero-title {
  font-size: clamp(2.3rem, 5vw + 0.8rem, 3.8rem);
  line-height: 1.18;
  font-weight: 800;
  color: var(--color-navy);
  margin-bottom: 1.35rem;
  letter-spacing: -0.03em;
}

.hero-title .highlight-teal {
  color: var(--color-primary);
  position: relative;
  display: inline-block;
}

.hero-title .highlight-teal::after {
  content: "";
  position: absolute;
  bottom: 0.1em;
  left: 0;
  width: 100%;
  height: 0.18em;
  background-color: var(--color-primary-tint);
  z-index: -1;
  border-radius: 2px;
}

.hero-subhead {
  font-size: clamp(1.05rem, 1.8vw + 0.5rem, 1.3rem);
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 820px;
  margin: 0 auto 2.2rem auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-metrics-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2.25rem;
  padding-top: 1rem;
}

.metric-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.92rem;
  color: var(--color-text-main);
}

.metric-icon {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

/* Hero Workspace Interactive Visual (Dual Track Interface) */
.workspace-mockup-frame {
  margin-top: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.mockup-window-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: var(--color-navy);
  color: #FFFFFF;
}

.window-dots {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.window-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
}

.window-title-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.84rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
}

.window-title-badge svg {
  width: 16px;
  height: 16px;
}

.window-actions-dummy {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: #A0B3C2;
}

.window-badge-pill {
  background: rgba(8, 127, 123, 0.35);
  border: 1px solid var(--color-primary);
  color: #98E8E4;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.74rem;
}

/* Mockup Layout */
.mockup-body {
  display: grid;
  grid-template-columns: 240px 1fr 340px;
  min-height: 480px;
  background: #FFFFFF;
}

/* Sidebar */
.mockup-sidebar {
  background: var(--color-surface-subtle);
  border-right: 1px solid var(--color-border-subtle);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sidebar-group-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.sidebar-menu-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.sidebar-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-xs);
  font-size: 0.88rem;
  color: var(--color-text-main);
  font-weight: 500;
  cursor: default;
}

.sidebar-item.is-active {
  background: var(--color-surface);
  color: var(--color-primary);
  font-weight: 600;
  box-shadow: var(--shadow-xs);
  border-left: 3px solid var(--color-primary);
}

.sidebar-tag {
  font-size: 0.72rem;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full);
  background: var(--color-border-subtle);
  color: var(--color-text-muted);
}

.sidebar-item.is-active .sidebar-tag {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* Center Content: Deterministic Business Canvas */
.mockup-center-canvas {
  padding: 1.5rem;
  overflow-y: auto;
  border-right: 1px solid var(--color-border-subtle);
}

.canvas-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.canvas-task-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 0.35rem;
}

.canvas-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.task-status-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success-border);
}

.canvas-block {
  background: var(--color-bg);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 1rem 1.15rem;
  margin-bottom: 1.25rem;
}

.canvas-block-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 0.75rem;
}

.canvas-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.canvas-data-table th,
.canvas-data-table td {
  padding: 0.55rem 0.65rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border-subtle);
}

.canvas-data-table th {
  color: var(--color-text-muted);
  font-weight: 600;
  background: var(--color-surface);
}

.canvas-data-table td.numeric {
  text-align: right;
  font-family: var(--font-mono);
}

/* Right Rail: AI Assistant & Verified Audit Output */
.mockup-ai-assistant {
  background: #FCFDFD;
  display: flex;
  flex-direction: column;
}

.ai-assistant-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-surface);
}

.ai-assistant-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-navy);
}

.ai-assistant-title svg {
  width: 20px;
  height: 20px;
}

.ai-feed-content {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 0.85rem;
}

.ai-bubble {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  box-shadow: var(--shadow-xs);
}

.ai-bubble.is-agent {
  border-left: 3px solid var(--color-primary);
  background: #F4FAF9;
}

.bubble-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.74rem;
  color: var(--color-text-light);
  margin-bottom: 0.45rem;
}

.bubble-agent-tag {
  font-weight: 700;
  color: var(--color-primary);
}

.bubble-text {
  color: var(--color-text-main);
  line-height: 1.55;
}

.verified-card {
  background: var(--color-surface);
  border: 1px dashed var(--color-primary-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  margin-top: 0.5rem;
}

.verified-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.35rem;
}

.mockup-disclaimer-bar {
  background: var(--color-surface-subtle);
  border-top: 1px solid var(--color-border-subtle);
  padding: 0.65rem 1.25rem;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ==========================================================================
   5. Core Differentiation / Work Principles
   ========================================================================== */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.principle-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 2.2rem 1.85rem;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.principle-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 5%, var(--color-primary-border) 40%, var(--color-primary) 50%, var(--color-primary-border) 60%, transparent 95%);
  opacity: 0.55;
  transition: opacity var(--transition-fast);
}

.principle-card:hover {
  border-color: var(--color-primary-border);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.principle-card:hover::before {
  opacity: 1;
}

.principle-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 1.35rem;
}

.principle-card h3 {
  color: var(--color-navy);
  margin-bottom: 0.75rem;
  font-size: 1.22rem;
}

.principle-card p {
  color: var(--color-text-muted);
  font-size: 0.94rem;
  line-height: 1.65;
}

.principle-detail-list {
  list-style: none;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.principle-detail-list li {
  font-size: 0.85rem;
  color: var(--color-text-main);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.principle-detail-list li::before {
  content: "✓";
  color: var(--color-primary);
  font-weight: 700;
}

/* ==========================================================================
   6. Interactive Scenarios Section (业务协同实景)
   ========================================================================== */
.scenarios-interactive-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.scenario-tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border-subtle);
  background: var(--color-surface-subtle);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.scenario-tab-btn {
  flex: 1;
  min-width: 220px;
  padding: 1.15rem 1.5rem;
  text-align: left;
  border-bottom: 3px solid transparent;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  background: transparent;
  border-right: 1px solid var(--color-border-subtle);
}

.scenario-tab-btn:last-child {
  border-right: none;
}

.scenario-tab-btn.is-active {
  background: var(--color-surface);
  border-bottom-color: var(--color-primary);
}

.tab-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-light);
  letter-spacing: 0.04em;
}

.scenario-tab-btn.is-active .tab-badge {
  color: var(--color-primary);
}

.tab-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-navy);
}

.tab-sub {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* Scenario Detail Content */
.scenario-pane {
  display: none;
  padding: 2.5rem;
}

.scenario-pane.is-active {
  display: block;
}

.scenario-overview-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
}

.scenario-overview-left {
  max-width: 720px;
}

.scenario-overview-title {
  font-size: 1.45rem;
  color: var(--color-navy);
  margin-bottom: 0.5rem;
}

.scenario-overview-desc {
  font-size: 0.98rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.scenario-badge-stack {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  flex-shrink: 0;
  align-items: flex-end;
}

.scenario-pill {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--color-surface-subtle);
  color: var(--color-navy);
  border: 1px solid var(--color-border-subtle);
}

/* 3-Step Interactive Grid (Input -> Collaboration -> Output) */
.scenario-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  position: relative;
}

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

.step-card:hover {
  background: #FFFFFF;
  border-color: var(--color-border-medium);
  box-shadow: var(--shadow-sm);
}

.step-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.step-num-pill {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-navy);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
}

.step-stage-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.step-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 0.5rem;
}

.step-card-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.step-artifact-box {
  margin-top: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xs);
  padding: 0.85rem;
  font-size: 0.82rem;
}

.step-artifact-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: 0.4rem;
}

.artifact-code-snippet {
  font-family: var(--font-mono);
  background: var(--color-surface-subtle);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-xs);
  color: var(--color-navy);
  font-size: 0.76rem;
  display: block;
  overflow-x: auto;
}

.artifact-item-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.35rem;
  color: var(--color-text-main);
}

.artifact-item-row:last-child {
  margin-bottom: 0;
}

.artifact-check {
  color: var(--color-success);
  font-weight: bold;
}

/* ==========================================================================
   7. Product Architecture Hierarchy (7 Formal Components)
   ========================================================================== */
.architecture-container {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 2rem;
  align-items: start;
}

/* Stratified Tier System */
.architecture-tiers-flow {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.arch-tier-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.6rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.arch-tier-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 5%, var(--color-primary-border) 40%, var(--color-primary) 50%, var(--color-primary-border) 60%, transparent 95%);
  opacity: 0.5;
  transition: opacity var(--transition-fast);
}

.arch-tier-card:hover {
  border-color: var(--color-primary-border);
  box-shadow: var(--shadow-md);
}

.arch-tier-card:hover::before {
  opacity: 1;
}

.tier-label-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.tier-title-small {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-navy);
}

.tier-desc-small {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.arch-component-buttons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.85rem;
}

.comp-interactive-button {
  background: var(--color-bg);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.95rem 1.15rem;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.comp-interactive-button:hover {
  background: var(--color-surface);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(8, 127, 123, 0.12);
}

.comp-interactive-button.is-active {
  background: #FFFFFF;
  border: 2px solid var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-tint), 0 4px 14px rgba(8, 127, 123, 0.15);
}

.comp-btn-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: var(--radius-xs);
  background: #FFFFFF;
  padding: 3px;
  border: 1px solid var(--color-border-subtle);
}

.comp-btn-info {
  display: flex;
  flex-direction: column;
}

.comp-btn-name {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: -0.01em;
}

.comp-btn-summary {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  line-height: 1.35;
  margin-top: 0.15rem;
}

/* Product Detail Inspector Box */
.component-detail-inspector {
  background: var(--color-surface);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
}

.inspector-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: 1.25rem;
}

.inspector-logo {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  background: var(--color-surface-subtle);
  padding: 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-subtle);
}

.inspector-titles {
  display: flex;
  flex-direction: column;
}

.inspector-comp-name {
  font-size: 1.22rem;
  font-weight: 800;
  color: var(--color-navy);
}

.inspector-comp-category {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.inspector-body-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  font-size: 0.9rem;
}

.inspector-field-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}

.inspector-field-text {
  color: var(--color-text-main);
  line-height: 1.6;
}

.inspector-points-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.inspector-points-list li {
  font-size: 0.85rem;
  color: var(--color-text-main);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.inspector-points-list li::before {
  content: "•";
  color: var(--color-primary);
  font-weight: bold;
}

/* ==========================================================================
   8. Enterprise Governance & Controllability Section
   ========================================================================== */
.governance-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.gov-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 2.2rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.gov-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 5%, var(--color-primary-border) 40%, var(--color-primary) 50%, var(--color-primary-border) 60%, transparent 95%);
  opacity: 0.55;
  transition: opacity var(--transition-fast);
}

.gov-card:hover {
  border-color: var(--color-primary-border);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.gov-card:hover::before {
  opacity: 1;
}

.gov-card-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--color-navy);
  background: var(--color-surface-subtle);
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-xs);
  margin-bottom: 1rem;
  border: 1px solid var(--color-border-subtle);
}

.gov-card h3 {
  font-size: 1.25rem;
  color: var(--color-navy);
  margin-bottom: 0.75rem;
}

.gov-card p {
  font-size: 0.94rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.gov-card-footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border-subtle);
  font-size: 0.84rem;
  color: var(--color-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ==========================================================================
   9. Interactive Requirement Drafter (100% Client-Side Local)
   ========================================================================== */
.drafter-card-wrapper {
  background: var(--color-surface);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-lg);
  padding: 2.8rem 2.5rem;
  box-shadow: var(--shadow-lg);
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.drafter-card-wrapper::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 5%, var(--color-primary-border) 40%, var(--color-primary) 50%, var(--color-primary-border) 60%, transparent 95%);
  opacity: 0.7;
}

.drafter-intro-text {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 2rem auto;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.drafter-privacy-callout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-tint);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.25rem;
  margin-bottom: 2rem;
  font-size: 0.85rem;
  color: var(--color-primary-hover);
  font-weight: 500;
}

.drafter-privacy-callout svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.drafter-form-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.drafter-field-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.drafter-label {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--color-navy);
}

.drafter-select,
.drafter-input {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-xs);
  background: #FFFFFF;
  color: var(--color-text-main);
  font-family: inherit;
  font-size: 0.92rem;
  transition: border-color var(--transition-fast);
}

.drafter-select:focus,
.drafter-input:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-tint);
}

.drafter-action-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.drafter-output-container {
  background: var(--color-bg);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
}

.drafter-output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.drafter-output-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-navy);
}

.drafter-output-buttons {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.drafter-textarea {
  width: 100%;
  height: 160px;
  background: #FFFFFF;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xs);
  padding: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--color-text-main);
  resize: vertical;
}

/* ==========================================================================
   10. Direct Contact & FAQ / Boundary Section
   ========================================================================== */
.contact-section-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
}

.contact-card-title {
  font-size: 1.45rem;
  color: var(--color-navy);
  margin-bottom: 0.75rem;
}

.contact-card-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

.email-display-box {
  background: var(--color-bg);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-sm);
  padding: 1.15rem 1.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.email-text-label {
  display: flex;
  flex-direction: column;
}

.email-hint {
  font-size: 0.76rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.email-address-text {
  font-family: var(--font-mono);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--color-navy);
  word-break: break-all;
}

.email-action-btns {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.contact-guidance-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.contact-guidance-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.contact-guidance-list li::before {
  content: "→";
  color: var(--color-primary);
  font-weight: bold;
}

/* Boundary & FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-border-medium);
}

.faq-toggle-btn {
  width: 100%;
  padding: 1.15rem 1.35rem;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-navy);
  background: transparent;
}

.faq-arrow {
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-item.is-expanded .faq-arrow {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.faq-body {
  display: none;
  padding: 0 1.35rem 1.25rem 1.35rem;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  border-top: 1px solid transparent;
}

.faq-item.is-expanded .faq-body {
  display: block;
  border-top-color: var(--color-border-subtle);
}

/* ==========================================================================
   11. Site Footer
   ========================================================================== */
.site-footer {
  background-color: #0F1C26;
  background-image: 
    radial-gradient(ellipse 60% 50% at 80% 0%, rgba(8, 127, 123, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 20% 100%, rgba(27, 108, 176, 0.08) 0%, transparent 60%),
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  color: #A3B8C7;
  padding: 5rem 0 2.5rem 0;
  border-top: 1px solid rgba(8, 127, 123, 0.35);
  position: relative;
  overflow: hidden;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-logo-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: #FFFFFF;
}

.footer-logo-svg {
  width: 32px;
  height: 32px;
}

.footer-brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #FFFFFF;
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.65;
  color: #8C9EA8;
  max-width: 340px;
}

.footer-col-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #FFFFFF;
  margin-bottom: 1.15rem;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links-list a {
  color: #A3B8C7;
  font-size: 0.88rem;
}

.footer-links-list a:hover {
  color: #FFFFFF;
}

.footer-contact-info {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.88rem;
}

.footer-email-link {
  color: #26C6BE;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  word-break: break-all;
}

.footer-email-link:hover {
  color: #8CECE8;
  text-decoration: underline;
}

.footer-bottom-bar {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
  color: #728490;
}

.footer-note-text {
  max-width: 600px;
  line-height: 1.5;
}

/* ==========================================================================
   11.5 Toast Notification Component
   ========================================================================== */
.toast-notice {
  position: fixed;
  bottom: 2.2rem;
  right: 2.2rem;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: rgba(15, 28, 38, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: #FFFFFF;
  border: 1px solid rgba(8, 127, 123, 0.45);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.45rem;
  box-shadow: 0 16px 36px rgba(15, 28, 38, 0.4), 0 0 20px rgba(8, 127, 123, 0.25);
  font-size: 0.92rem;
  font-weight: 500;
  max-width: 440px;
  opacity: 0;
  transform: translateY(18px) scale(0.96);
  pointer-events: none;
  transition: opacity 240ms cubic-bezier(0.16, 1, 0.3, 1), transform 240ms cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-notice.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.toast-notice svg {
  color: #26C6BE;
  flex-shrink: 0;
  filter: drop-shadow(0 0 6px rgba(38, 198, 190, 0.6));
}

@media (max-width: 640px) {
  .toast-notice {
    bottom: 1.2rem;
    left: 1rem;
    right: 1rem;
    max-width: none;
    justify-content: center;
  }
}

/* ==========================================================================
   12. Responsive Breakpoints & Fallbacks
   ========================================================================== */
@media (max-width: 1080px) {
  .mockup-body {
    grid-template-columns: 200px 1fr 300px;
  }

  .architecture-container {
    grid-template-columns: 1fr;
  }

  .component-detail-inspector {
    position: static;
    margin-top: 1.5rem;
  }

  .footer-top-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .footer-top-grid > :last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .principles-grid {
    grid-template-columns: 1fr;
  }

  .scenario-steps-grid {
    grid-template-columns: 1fr;
  }

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

  .drafter-form-grid {
    grid-template-columns: 1fr;
  }

  .contact-section-wrap {
    grid-template-columns: 1fr;
  }

  .mockup-body {
    grid-template-columns: 1fr;
  }

  .mockup-sidebar {
    display: none;
  }

  .mockup-center-canvas {
    border-right: none;
    border-bottom: 1px solid var(--color-border-subtle);
  }
}

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

  .mobile-nav-toggle {
    display: flex;
  }

  .mobile-drawer {
    display: block;
  }

  .hero-section {
    padding: 3rem 0 4rem 0;
  }

  .section {
    padding: 4rem 0;
  }

  .scenario-overview-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .scenario-badge-stack {
    align-items: flex-start;
  }

  .scenario-pane {
    padding: 1.5rem 1.25rem;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .email-display-box {
    flex-direction: column;
    align-items: flex-start;
  }

  .email-action-btns {
    width: 100%;
  }

  .email-action-btns .btn {
    flex: 1;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  .hero-metrics-strip {
    gap: 1rem;
    justify-content: flex-start;
  }

  .drafter-card-wrapper {
    padding: 1.5rem 1rem;
  }

  .contact-card {
    padding: 1.5rem 1rem;
  }
}

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Print Styles */
@media print {
  .site-header,
  .mobile-nav-toggle,
  .mobile-drawer,
  .drafter-action-bar,
  .toast-notice {
    display: none !important;
  }

  body {
    background: #FFFFFF;
    color: #000000;
  }

  .section {
    padding: 2rem 0;
  }
}