/* ==========================================================================
   走哪啦 (ZounaLa) - 苹果风格产品宣传官网样式表
   Apple Pro Aesthetic Design System
   ========================================================================== */

:root {
  /* Color Palette - Apple Pro Dark Theme */
  --bg-primary: #000000;
  --bg-secondary: #0a0a0f;
  --bg-tertiary: #12131a;
  --bg-card: rgba(20, 21, 30, 0.7);
  --bg-card-hover: rgba(28, 30, 44, 0.85);
  --bg-glass: rgba(15, 16, 24, 0.75);
  --bg-pill: rgba(255, 255, 255, 0.08);

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(255, 255, 255, 0.18);
  --border-active: rgba(0, 113, 227, 0.5);

  /* Typography Colors */
  --text-primary: #f5f5f7;
  --text-secondary: #86868b;
  --text-tertiary: #6e6e73;
  --text-accent: #2997ff;
  --text-accent-glow: #64d2ff;

  /* Accent Gradients & Colors */
  --apple-blue: #0071e3;
  --apple-blue-light: #2997ff;
  --apple-purple: #bf5af2;
  --apple-indigo: #5e5ce6;
  --apple-teal: #64d2ff;
  --apple-green: #30d158;
  --apple-orange: #ff9f0a;
  --apple-pink: #ff375f;
  --apple-yellow: #ffd60a;

  /* Radiant Gradients */
  --grad-hero: linear-gradient(180deg, #ffffff 0%, #a1a1a6 100%);
  --grad-accent: linear-gradient(135deg, #2997ff 0%, #a855f7 50%, #ec4899 100%);
  --grad-privacy: linear-gradient(135deg, #30d158 0%, #06b6d4 100%);
  --grad-security: linear-gradient(135deg, #bf5af2 0%, #5e5ce6 100%);
  --grad-local: linear-gradient(135deg, #ff9f0a 0%, #ff375f 100%);
  --grad-craft: linear-gradient(135deg, #64d2ff 0%, #2997ff 100%);
  --grad-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --grad-glow: radial-gradient(circle at 50% 50%, rgba(41, 151, 255, 0.15) 0%, rgba(0, 0, 0, 0) 70%);

  /* Dimensions & Spacing */
  --container-max: 1200px;
  --nav-height: 52px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Typography Stack */
  --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Menlo", "Consolas", monospace;

  /* Transitions & Shadows */
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.6);
  --shadow-glow-blue: 0 0 40px rgba(41, 151, 255, 0.25);
  --shadow-glow-purple: 0 0 40px rgba(191, 90, 242, 0.25);
}

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

html {
  font-family: var(--font-stack);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  overflow-x: hidden;
  background-color: var(--bg-primary);
  line-height: 1.6;
  font-size: 17px;
}

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

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

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

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Navigation Bar (Apple Style Sticky Frosted Nav)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  transition: var(--transition-fast);
}

.site-header.scrolled {
  background: rgba(10, 10, 15, 0.88);
  border-bottom: 1px solid var(--border-highlight);
}

.nav-container {
  max-width: var(--container-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.brand-tag {
  font-size: 11px;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: rgba(41, 151, 255, 0.15);
  color: var(--apple-blue-light);
  border: 1px solid rgba(41, 151, 255, 0.3);
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
  transition: var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-nav-cta {
  font-size: 12px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--apple-blue);
  color: #ffffff;
  transition: var(--transition-fast);
}

.btn-nav-cta:hover {
  background: #0077ed;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 113, 227, 0.4);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-glow-bg {
  position: absolute;
  top: 15%;
  left: 50%;
  transform: translateX(-50%);
  width: 75vw;
  max-width: 1000px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(41, 151, 255, 0.18) 0%, rgba(191, 90, 242, 0.12) 40%, rgba(0, 0, 0, 0) 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0 auto 50px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 24px;
  backdrop-filter: blur(12px);
  animation: fadeInDown 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-pill .pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--apple-green);
  box-shadow: 0 0 10px var(--apple-green);
  animation: pulseDot 2s infinite;
}

.hero-title {
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  background: linear-gradient(180deg, #ffffff 0%, #dedede 65%, #888890 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fadeInUp 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-title .text-gradient-flow {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.5;
  max-width: 720px;
  margin: 0 auto 36px;
  letter-spacing: -0.015em;
  animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 1.1s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: #ffffff;
  color: #000000;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
  transition: var(--transition-smooth);
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.35);
  background: #f0f0f2;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-highlight);
  backdrop-filter: blur(12px);
  transition: var(--transition-smooth);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* Hero Key Pillars Ribbon */
.hero-pillars-ribbon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin-top: 36px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  flex-wrap: wrap;
}

.pillar-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.pillar-item .p-icon {
  font-size: 16px;
}

.pillar-item strong {
  color: var(--text-primary);
}

.pillar-divider {
  width: 1px;
  height: 16px;
  background: var(--border-subtle);
}

/* Hero Showcase Device Mockup */
.hero-device-wrapper {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1020px;
  margin-top: 40px;
  perspective: 1200px;
}

.device-showcase-card {
  position: relative;
  background: linear-gradient(180deg, rgba(28, 30, 42, 0.7) 0%, rgba(13, 14, 20, 0.9) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-xl);
  padding: 48px 32px;
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.8), var(--shadow-glow-blue);
  backdrop-filter: blur(24px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  overflow: hidden;
}

/* Floating Glass Badges */
.floating-badge {
  position: absolute;
  padding: 12px 18px;
  background: rgba(18, 20, 30, 0.85);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  z-index: 10;
  animation: floatSlow 6s ease-in-out infinite;
}

.floating-badge.badge-top-left {
  top: 40px;
  left: 30px;
  animation-delay: 0s;
}

.floating-badge.badge-bottom-left {
  bottom: 50px;
  left: 40px;
  animation-delay: 1.5s;
}

.floating-badge.badge-top-right {
  top: 60px;
  right: 30px;
  animation-delay: 3s;
}

.floating-badge.badge-bottom-right {
  bottom: 40px;
  right: 40px;
  animation-delay: 4.5s;
}

.badge-icon-box {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.badge-icon-box.green {
  background: rgba(48, 209, 88, 0.15);
  color: var(--apple-green);
  border: 1px solid rgba(48, 209, 88, 0.3);
}

.badge-icon-box.purple {
  background: rgba(191, 90, 242, 0.15);
  color: var(--apple-purple);
  border: 1px solid rgba(191, 90, 242, 0.3);
}

.badge-icon-box.blue {
  background: rgba(41, 151, 255, 0.15);
  color: var(--apple-blue-light);
  border: 1px solid rgba(41, 151, 255, 0.3);
}

.badge-icon-box.orange {
  background: rgba(255, 159, 10, 0.15);
  color: var(--apple-orange);
  border: 1px solid rgba(255, 159, 10, 0.3);
}

.badge-text-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 13px;
  line-height: 1.3;
}

.badge-text-sub {
  font-size: 11px;
  color: var(--text-secondary);
}

/* Device iPhone Frame */
.iphone-frame {
  position: relative;
  width: 310px;
  height: 640px;
  background: #000000;
  border-radius: 52px;
  padding: 11px;
  box-shadow: 0 0 0 3px #2c2d30, 0 0 0 5px #151618, 0 25px 60px rgba(0, 0, 0, 0.9);
  z-index: 2;
}

.iphone-island {
  position: absolute;
  top: 19px;
  left: 50%;
  transform: translateX(-50%);
  width: 96px;
  height: 26px;
  background: #000000;
  border-radius: 20px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
}

.island-camera {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #111422;
  box-shadow: inset 0 0 2px rgba(255, 255, 255, 0.2);
}

.island-sensor {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #0d0e14;
}

.iphone-screen {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 42px;
  overflow: hidden;
  background: #000000;
}

.iphone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

/* Showcase side preview cards */
.showcase-side-preview {
  flex: 1;
  max-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mini-preview-card {
  background: rgba(20, 22, 32, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: var(--transition-smooth);
}

.mini-preview-card:hover {
  background: rgba(26, 29, 44, 0.95);
  border-color: var(--border-highlight);
  transform: translateY(-2px);
}

.mini-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.mini-card-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}

.mini-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.mini-card-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ==========================================================================
   Section Headers & Common Layout
   ========================================================================== */
.section {
  padding: 120px 0;
  position: relative;
}

.section-darker {
  background: var(--bg-secondary);
}

.section-gradient-ambient {
  background: radial-gradient(circle at 50% 0%, rgba(20, 24, 42, 0.6) 0%, var(--bg-primary) 70%);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 64px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--apple-blue-light);
  margin-bottom: 12px;
}

.section-eyebrow.green {
  color: var(--apple-green);
}

.section-eyebrow.purple {
  color: var(--apple-purple);
}

.section-eyebrow.orange {
  color: var(--apple-orange);
}

.section-title {
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Section 1: Philosophy & Mission (产品宗旨与对比)
   ========================================================================== */
.philosophy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 50px;
}

.philosophy-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 40px;
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.philosophy-card.card-traditional {
  border-color: rgba(255, 69, 58, 0.2);
  background: linear-gradient(180deg, rgba(30, 15, 18, 0.4) 0%, rgba(15, 16, 22, 0.6) 100%);
}

.philosophy-card.card-zounala {
  border-color: rgba(41, 151, 255, 0.35);
  background: linear-gradient(180deg, rgba(20, 32, 55, 0.5) 0%, rgba(15, 18, 28, 0.8) 100%);
  box-shadow: 0 10px 40px rgba(0, 113, 227, 0.15);
}

.philosophy-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

.philosophy-badge.bad {
  background: rgba(255, 69, 58, 0.15);
  color: #ff6b6b;
  border: 1px solid rgba(255, 69, 58, 0.3);
}

.philosophy-badge.good {
  background: rgba(41, 151, 255, 0.2);
  color: var(--apple-blue-light);
  border: 1px solid rgba(41, 151, 255, 0.4);
}

.philosophy-card h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.philosophy-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 24px;
}

.philosophy-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.philosophy-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
}

.philosophy-list li strong {
  color: var(--text-primary);
}

.philosophy-list li .icon-status {
  font-size: 16px;
  line-height: 1.4;
}

.quote-highlight-banner {
  background: linear-gradient(135deg, rgba(41, 151, 255, 0.08) 0%, rgba(191, 90, 242, 0.08) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  text-align: center;
  margin-top: 40px;
  position: relative;
}

.quote-highlight-banner h4 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.quote-highlight-banner p {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 800px;
  margin: 0 auto;
}

/* ==========================================================================
   Section 2: Four Core Pillars (四大核心：本地化、安全、隐私、精致)
   ========================================================================== */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.pillar-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-lg);
}

.pillar-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 24px;
  transition: var(--transition-smooth);
}

.pillar-card:hover .pillar-card-icon {
  transform: scale(1.1);
}

.pillar-card.p-local .pillar-card-icon {
  background: rgba(255, 159, 10, 0.15);
  color: var(--apple-orange);
  border: 1px solid rgba(255, 159, 10, 0.3);
}

.pillar-card.p-security .pillar-card-icon {
  background: rgba(191, 90, 242, 0.15);
  color: var(--apple-purple);
  border: 1px solid rgba(191, 90, 242, 0.3);
}

.pillar-card.p-privacy .pillar-card-icon {
  background: rgba(48, 209, 88, 0.15);
  color: var(--apple-green);
  border: 1px solid rgba(48, 209, 88, 0.3);
}

.pillar-card.p-craft .pillar-card-icon {
  background: rgba(41, 151, 255, 0.15);
  color: var(--apple-blue-light);
  border: 1px solid rgba(41, 151, 255, 0.3);
}

.pillar-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.pillar-card .pillar-tagline {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-accent);
  margin-bottom: 14px;
}

.pillar-card.p-local .pillar-tagline { color: var(--apple-orange); }
.pillar-card.p-security .pillar-tagline { color: var(--apple-purple); }
.pillar-card.p-privacy .pillar-tagline { color: var(--apple-green); }
.pillar-card.p-craft .pillar-tagline { color: var(--apple-blue-light); }

.pillar-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.pillar-tech-specs {
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tech-spec-item {
  font-size: 12px;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.tech-spec-item span {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ==========================================================================
   Section 3: Target Audiences (目标用户画像 - 一目了然)
   ========================================================================== */
.personas-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.persona-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 36px;
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.persona-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
}

.persona-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.persona-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.persona-card.persona-walker .persona-avatar {
  background: rgba(41, 151, 255, 0.15);
  border: 2px solid rgba(41, 151, 255, 0.3);
}

.persona-card.persona-hiker .persona-avatar {
  background: rgba(255, 159, 10, 0.15);
  border: 2px solid rgba(255, 159, 10, 0.3);
}

.persona-card.persona-couple .persona-avatar {
  background: rgba(255, 55, 95, 0.15);
  border: 2px solid rgba(255, 55, 95, 0.3);
}

.persona-card.persona-geek .persona-avatar {
  background: rgba(48, 209, 88, 0.15);
  border: 2px solid rgba(48, 209, 88, 0.3);
}

.persona-title-group h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 2px;
}

.persona-title-group .persona-subtitle-tag {
  font-size: 13px;
  color: var(--text-secondary);
}

.persona-quote {
  font-size: 15px;
  font-style: italic;
  color: var(--text-primary);
  border-left: 2px solid var(--apple-blue);
  padding-left: 14px;
  margin-bottom: 18px;
}

.persona-features-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
}

.persona-features-box h4 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-bottom: 10px;
}

.persona-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.persona-chip {
  font-size: 12px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

/* ==========================================================================
   Section 4: Bento Grid Features (深度功能矩阵)
   ========================================================================== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 36px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

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

.bento-col-8 { grid-column: span 8; }
.bento-col-4 { grid-column: span 4; }
.bento-col-6 { grid-column: span 6; }
.bento-col-12 { grid-column: span 12; }

.bento-card-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  margin-bottom: 16px;
  width: fit-content;
}

.bento-card h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.015em;
}

.bento-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 24px;
}

/* Interactive Bento Visuals */
.bento-visual-map {
  background: #090a10;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}

.map-stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  background: rgba(18, 20, 30, 0.85);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  backdrop-filter: blur(16px);
  z-index: 2;
}

.map-stat-col {
  text-align: center;
}

.map-stat-col .stat-val {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.map-stat-col .stat-lbl {
  font-size: 11px;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

.interactive-route-svg {
  width: 100%;
  height: 100px;
  margin-top: 10px;
}

/* Heatmap Simulated Visual */
.heatmap-visual-box {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-top: 16px;
}

.heatmap-grid-demo {
  display: grid;
  grid-template-columns: repeat(26, 1fr);
  gap: 4px;
  margin-bottom: 8px;
}

.heatmap-cell {
  aspect-ratio: 1;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.05);
  transition: transform 0.2s ease;
}

.heatmap-cell:hover {
  transform: scale(1.3);
}

.heatmap-cell.l-1 { background: rgba(48, 209, 88, 0.25); }
.heatmap-cell.l-2 { background: rgba(48, 209, 88, 0.5); }
.heatmap-cell.l-3 { background: rgba(48, 209, 88, 0.75); }
.heatmap-cell.l-4 { background: #30d158; box-shadow: 0 0 6px rgba(48, 209, 88, 0.6); }

/* Boredom Meter Visual */
.boredom-visual-box {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.boredom-meter-bar {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.boredom-meter-fill {
  height: 100%;
  width: 78%;
  background: linear-gradient(90deg, #30d158 0%, #ffd60a 50%, #ff453a 100%);
  border-radius: var(--radius-full);
  animation: meterPulse 3s ease-in-out infinite;
}

.boredom-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}

.boredom-status-tag {
  font-weight: 600;
  color: var(--apple-orange);
  background: rgba(255, 159, 10, 0.15);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

/* Polaroid Scrapbook Visual */
.polaroid-stack-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 20px;
}

.mini-polaroid {
  background: #fbfbf9;
  padding: 8px 8px 24px 8px;
  border-radius: 4px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  width: 120px;
  transition: var(--transition-smooth);
}

.mini-polaroid:nth-child(1) { transform: rotate(-6deg); }
.mini-polaroid:nth-child(2) { transform: rotate(4deg) scale(1.05); z-index: 2; }
.mini-polaroid:nth-child(3) { transform: rotate(-3deg); }

.mini-polaroid:hover {
  transform: scale(1.15) rotate(0deg);
  z-index: 10;
}

.mini-polaroid-photo {
  width: 100%;
  aspect-ratio: 1;
  background: #2a2b36;
  border-radius: 2px;
  overflow: hidden;
}

.mini-polaroid-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mini-polaroid-caption {
  font-size: 9px;
  color: #333333;
  margin-top: 6px;
  text-align: center;
  font-family: var(--font-mono);
}

/* Widget Mockup Visual */
.widget-mockup-row {
  display: flex;
  gap: 16px;
  margin-top: 20px;
  justify-content: center;
}

.widget-box {
  background: rgba(25, 27, 38, 0.9);
  border: 1px solid var(--border-highlight);
  border-radius: 22px;
  padding: 16px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.widget-box.small {
  width: 130px;
  height: 130px;
}

.widget-box.medium {
  width: 270px;
  height: 130px;
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-secondary);
}

.widget-btn-action {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.1);
  padding: 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.widget-btn-action:hover {
  background: var(--apple-blue);
}

/* ==========================================================================
   Section 5: Interactive Simulator / Live Showcase
   ========================================================================== */
.simulator-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(24px);
}

.sim-nav-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.sim-tab-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  transition: var(--transition-smooth);
}

.sim-tab-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.sim-tab-btn.active {
  background: #ffffff;
  color: #000000;
  font-weight: 600;
  border-color: #ffffff;
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.2);
}

.sim-panel {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  animation: fadeIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.sim-panel.active {
  display: grid;
}

.sim-info-col h3 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.2;
}

.sim-info-col p {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 24px;
}

.sim-feature-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}

.sim-feature-bullets li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.sim-feature-bullets li strong {
  color: var(--text-primary);
}

.sim-feature-bullets li .bullet-check {
  color: var(--apple-green);
  font-size: 16px;
}

.sim-preview-col {
  display: flex;
  justify-content: center;
  align-items: center;
}

.sim-phone-display {
  width: 290px;
  height: 590px;
  background: #000000;
  border-radius: 46px;
  padding: 10px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8), 0 0 0 2px rgba(255, 255, 255, 0.15);
  position: relative;
  overflow: hidden;
}

.sim-phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 36px;
  overflow: hidden;
  background: #0d0e15;
}

.sim-phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================================================
   Section 6: Privacy Whitepaper & Comparison Table
   ========================================================================== */
.privacy-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px;
  backdrop-filter: blur(20px);
  margin-top: 40px;
  overflow-x: auto;
}

.privacy-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.privacy-table th {
  padding: 16px 20px;
  color: var(--text-secondary);
  font-weight: 600;
  border-bottom: 1px solid var(--border-highlight);
}

.privacy-table th.col-highlight {
  color: var(--apple-blue-light);
  font-size: 16px;
}

.privacy-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.privacy-table td strong {
  color: var(--text-primary);
}

.privacy-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.tag-secure {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--apple-green);
  font-weight: 600;
}

.tag-risk {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #ff453a;
  font-weight: 500;
}

/* ==========================================================================
   Section 7: Technical Specifications (技术工艺)
   ========================================================================== */
.tech-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition-smooth);
}

.tech-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  transform: translateY(-3px);
}

.tech-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.tech-badge-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.tech-card h4 {
  font-size: 17px;
  font-weight: 600;
}

.tech-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   Section 8: FAQ Accordion
   ========================================================================== */
.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.faq-item.active {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
}

.faq-question {
  width: 100%;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-toggle-icon {
  font-size: 20px;
  color: var(--text-secondary);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(45deg);
  color: var(--apple-blue-light);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 250px;
  padding-bottom: 24px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Section 9: CTA Download Banner & Footer
   ========================================================================== */
.cta-banner-wrapper {
  background: linear-gradient(180deg, rgba(20, 24, 40, 0.9) 0%, rgba(10, 11, 16, 0.95) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-xl);
  padding: 80px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), var(--shadow-glow-blue);
}

.cta-banner-glow {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 300px;
  background: radial-gradient(circle, rgba(41, 151, 255, 0.25) 0%, transparent 70%);
  filter: blur(50px);
  pointer-events: none;
}

.cta-app-icon {
  width: 90px;
  height: 90px;
  border-radius: 22px;
  margin: 0 auto 24px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.cta-banner-wrapper h2 {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.cta-banner-wrapper p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 36px;
}

.cta-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #ffffff;
  color: #000000;
  padding: 16px 36px;
  border-radius: var(--radius-full);
  font-size: 16px;
  font-weight: 600;
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.25);
  transition: var(--transition-smooth);
}

.cta-download-btn:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 40px rgba(255, 255, 255, 0.4);
}

/* Site Footer */
.site-footer {
  background: #000000;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 40px;
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h4 {
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand p {
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 13px;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-secondary);
}

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

.footer-bottom-bar {
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes pulseDot {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.3);
  }
}

@keyframes meterPulse {
  0%, 100% { width: 78%; }
  50% { width: 84%; }
}

/* Scroll Reveal Helper Classes */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento-col-8, .bento-col-4, .bento-col-6 {
    grid-column: span 12;
  }
  .device-showcase-card {
    flex-direction: column;
    padding: 36px 20px;
  }
  .floating-badge {
    position: static;
    margin-bottom: 12px;
    animation: none;
  }
  .floating-badges-mobile-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
  }
  .tech-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .philosophy-grid {
    grid-template-columns: 1fr;
  }
  .personas-grid {
    grid-template-columns: 1fr;
  }
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  .sim-panel {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .sim-feature-bullets {
    align-items: center;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
  .hero-pillars-ribbon {
    gap: 16px;
    flex-direction: column;
  }
  .pillar-divider {
    display: none;
  }
  .tech-cards-grid {
    grid-template-columns: 1fr;
  }
  .map-stats-strip {
    grid-template-columns: repeat(2, 1fr);
  }
}