/* SWISS INTERNATIONAL STYLE - SignalAir Website */
/* Principles: Objectivity, Grid-as-Law, Typography-as-Interface */

/* CSS Variables - Swiss International Style Design System */
:root {
  /* Core Colors - Maximum Contrast */
  --black: #000000;
  --white: #FFFFFF;
  --muted: #D4D4D4;
  --gray-200: #E5E5E5;
  --gray-300: #D4D4D4;
  --gray-400: #A3A3A3;
  --gray-500: #737373;
  --gray-600: #525252;

  /* Logo Blue - The Only Signal Color */
  --swiss-red: #667eea;
  --accent-color: #667eea;
  --accent-dark: #5568d3;
  --accent-light: #8b9cff;

  /* Swiss Grid System */
  --grid-unit: 8px;
  --spacing-xs: calc(var(--grid-unit) * 1);
  --spacing-sm: calc(var(--grid-unit) * 2);
  --spacing-md: calc(var(--grid-unit) * 3);
  --spacing-lg: calc(var(--grid-unit) * 4);
  --spacing-xl: calc(var(--grid-unit) * 6);
  --spacing-2xl: calc(var(--grid-unit) * 8);
  --spacing-3xl: calc(var(--grid-unit) * 12);
  --spacing-4xl: calc(var(--grid-unit) * 16);
  --spacing-5xl: calc(var(--grid-unit) * 20);

  /* Border System - Strictly Rectangular */
  --border-width: 4px;
  --border-thin: 2px;
  --border-thick: 8px;
  --border-ultra: 12px;

  /* Transition System - Fizens Professional Easing */
  --ease-smooth: cubic-bezier(.3, 0, .2, 1);
  --transition-fast: 0.15s var(--ease-smooth);
  --transition-base: 0.2s var(--ease-smooth);
  --transition-slow: 0.3s var(--ease-smooth);
}

/* Basic Reset - Swiss Precision */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.5;
  color: var(--black);
  background: var(--white);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
}

/* Global Noise Texture on Body */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.015;
  pointer-events: none;
  z-index: 9999;
}

/* Typography - Swiss International Style */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
}

p {
  font-size: 1rem;
  line-height: 1.6;
  max-width: 65ch;
}

/* Grid System - Grid as Law */
.o-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.o-section {
  padding: var(--spacing-3xl) 0 0 0;
  border-bottom: var(--border-thin) solid var(--gray-200);
}

.o-grid {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: var(--spacing-lg);
}

.o-grid_item.-col-1-3 {
  grid-column: 1 / 6;
}

.o-grid_item.-col-3-5 {
  grid-column: 6 / 17;
}

.o-grid_item.-col-1-9 {
  grid-column: 1 / 9;
}

.o-grid_item.-col-9-17 {
  grid-column: 9 / 17;
}

.o-grid.-large-top {
  margin-top: -64px;
  margin-bottom: -53px;
}

/* ===================================================================
   STATISTICS - Swiss Typographic Grid
   ================================================================ */

.c-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-4xl);
  margin-bottom: 64px;
}

.c-stat-card {
  background: transparent;
  padding: 0;
  text-align: left;
  position: relative;
}

/* Minimal Divider Line */
.c-stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--black);
  transition: width var(--transition-slow), background var(--transition-base);
}

.c-stat-card:hover::before {
  width: 100%;
  background: var(--swiss-red);
}

.c-stat-number {
  font-size: 48px;
  font-weight: 900;
  line-height: 1.1;
  color: var(--black);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  display: block;
  transition: color var(--transition-base);
  word-break: keep-all;
}

.c-stat-card:hover .c-stat-number {
  color: var(--swiss-red);
}

.c-stat-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gray-500);
  display: block;
  line-height: 1.6;
  max-width: 120px;
}

/* Responsive Stats Grid */
@media (max-width: 1024px) {
  .c-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-3xl);
  }
}

@media (max-width: 640px) {
  /* 全局圖片響應式加強 */
  img {
    max-width: 100% !important;
    height: auto !important;
  }

  .c-stats-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .c-stat-number {
    font-size: 40px;
  }

  .c-stat-label {
    font-size: 9px;
  }

  /* 小屏幕手機 Phone Demo - 滿版顯示（放大以裁切白邊） */
  .c-phone-demo-container {
    height: auto !important;
    padding: 0 !important;
    display: block !important;
    position: relative !important;
    left: auto !important;
    right: auto !important;
    margin: 0 !important;
    width: 100vw !important;
    max-width: 100vw !important;
    overflow: hidden !important;
  }

  .c-phone-demo-image {
    width: 340vw !important;
    max-width: none !important;
    height: auto !important;
    position: relative !important;
    top: auto !important;
    left: 50% !important;
    transform: translateX(-51%) !important;
    opacity: 1 !important;
    margin: 0 !important;
    display: block !important;
  }

  /* 隱藏首頁人物圖片 - 僅手機版 */
  #heroCharacter1,
  #heroCharacter2 {
    display: none !important;
  }
}

/* Header - Swiss Minimalism */
.c-header {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--white);
  border-bottom: var(--border-width) solid var(--black);
  z-index: 1000;
  padding: var(--spacing-lg) 0;
}

.c-header_inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-2xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-3xl);
}

.c-header_title {
  flex-shrink: 0;
}

.c-header_logo {
  text-decoration: none;
  color: var(--black);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transition: color var(--transition-base);
}

.c-header_logo:hover {
  color: var(--swiss-red);
}

.c-header_logo_img {
  width: 40px;
  height: 40px;
  display: block;
}

.c-header_logo_text {
  font-size: 1.125rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.c-header_nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--spacing-3xl);
}

.c-header_right-link {
  flex-shrink: 0;
}

.c-navigation-line_list {
  display: flex;
  list-style: none;
  gap: var(--spacing-2xl);
  margin: 0;
  padding: 0;
  align-items: center;
}

.c-navigation-line_item {
  list-style: none;
  position: relative;
}

/* Mobile Menu - 桌面版隱藏 */
.c-mobile-menu-toggle,
.c-hamburger {
  display: none;
}

/* Buttons - Swiss Brutalism */
.c-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg) var(--spacing-2xl);
  background: var(--swiss-red);
  color: var(--white);
  border: var(--border-thin) solid var(--black);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.c-button:hover {
  background: var(--black);
  color: var(--white);
  transform: translateY(-2px);
}

.c-button:active {
  transform: translateY(0);
}

.c-button.-nav {
  background: transparent;
  color: var(--black);
  border: none;
  padding: var(--spacing-sm) 0;
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  font-weight: 700;
  text-transform: uppercase;
  position: relative;
  transition: color var(--transition-base);
}

.c-button.-nav::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--swiss-red);
  transition: width var(--transition-slow);
}

.c-button.-nav:hover {
  background: transparent;
  color: var(--swiss-red);
}

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

/* Active nav state */
.c-button.-nav.-active {
  color: var(--swiss-red);
}

.c-button.-nav.-active::after {
  width: 100%;
  background: var(--swiss-red);
}

.c-button.-line {
  background: var(--white);
  color: var(--black);
  border: var(--border-thin) solid var(--black);
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) var(--spacing-2xl);
}

.c-button.-line:hover {
  background: var(--swiss-red);
  color: var(--white);
  border-color: var(--swiss-red);
}

.c-hero-video_content.layout-horizontal .c-button.-line {
  flex-shrink: 0;
  align-self: flex-end;
  transform: translateX(0);
}

.c-button.-small {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.875rem;
}

.c-button_icon {
  font-size: 1.5rem;
  font-weight: 900;
  line-height: 1;
}

.c-button_label {
  line-height: 1;
}

/* Hero Video Section - Full Background with Centered Content */
.c-hero-video {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: var(--border-width) solid var(--black);
  background: var(--muted);
  padding: var(--spacing-3xl) var(--spacing-lg);
}

.c-hero-video_background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.c-hero-video_background::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: transparent;
  z-index: 1;
  display: none;
}

.c-figure_inner {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.c-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
  opacity: 1;
}

.c-hero-character {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  z-index: 10;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.3s ease-out;
  display: block;
}

.c-hero-video_content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-3xl);
  --box-opacity: 1;
  --layout-progress: 0;
  background: transparent;
  backdrop-filter: none;
  border: none;
  box-shadow: none;
  max-width: 900px;
  margin: 0 auto;
  transition: max-width 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              padding 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              align-items 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* White box only visible when at top (not scrolled) */
.c-hero-video_content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  border: var(--border-width) solid var(--black);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  z-index: -1;
  pointer-events: none;
  opacity: var(--box-opacity);
  transition: opacity 0.3s ease;
}

/* Completely hide the box when opacity is 0 */
.c-hero-video_content::before {
  display: var(--box-display, block);
}

/* Smooth transition for title and button */
.c-hero-video_content .c-hero-video_title,
.c-hero-video_content .c-button.-line {
  /* Transitions removed for static layout */
}

/* Layout transition state */
.c-hero-video_content.layout-horizontal {
  max-width: 1400px;
  flex-direction: row;
  align-items: flex-start;
  justify-content: space-between;
  text-align: left;
  gap: var(--spacing-4xl);
}

.c-hero-video_title {
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 900;
  line-height: 0.95;
  margin-bottom: var(--spacing-2xl);
  text-transform: uppercase;
  letter-spacing: -0.04em;
  color: var(--black);
}

/* Individual letter animation - disabled */
.hero-letter {
  display: inline-block;
  /* Animations removed for static display */
}

.c-hero-video_content.layout-horizontal .c-hero-video_title {
  margin-bottom: 0;
  flex: 1;
  transform: translateX(0);
}

.c-hero-break {
  display: block;
  color: var(--swiss-red);
  margin-top: var(--spacing-md);
}

/* Hero Composition - Hidden */
.c-hero-composition {
  display: none;
}

/* Text Utilities */
.c-text {
  font-size: 1rem;
  line-height: 1.6;
}

.c-text.-body-large {
  font-size: 1.25rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
  max-width: none;
}

.c-text.-chinese {
  font-weight: 400;
  color: var(--gray-600);
}

/* Video Toggler - Play Demo */
.c-video-toggler {
  position: relative;
  width: 100%;
  cursor: pointer;
  border: var(--border-width) solid var(--black);
  overflow: hidden;
  transition: all var(--transition-fast);
  background: var(--gray-100);
}

.c-video-toggler:hover {
  border-color: var(--accent-color);
  box-shadow: 8px 8px 0 var(--black);
  transform: translate(-2px, -2px);
}

.c-figure {
  position: relative;
  width: 100%;
  height: 400px;
  overflow: hidden;
  background: var(--gray-100);
}

.c-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.c-video-toggler_inner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 10;
}

.c-video-toggler_button {
  padding: var(--spacing-lg) var(--spacing-2xl);
  background: var(--accent-color);
  color: var(--white);
  border: var(--border-thin) solid var(--black);
  font-weight: 900;
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 8px 8px 0 var(--black);
}

.c-video-toggler_button:hover {
  transform: scale(1.1);
  box-shadow: 12px 12px 0 var(--black);
}

.c-video-toggler_button_label {
  display: block;
}

/* Progress Carousel - Features Section */
.c-progress-carousel {
  position: relative;
  background: var(--white);
  padding: 0 0 var(--spacing-5xl) 0;
}

.c-progress-carousel_inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.c-progress-carousel_list {
  display: flex;
  flex-direction: column;
  gap: 105px;
  position: relative;
  padding: 53px 0;
}

.c-progress-carousel_item {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 0;
  align-items: stretch;
  background: var(--white);
  border: var(--border-width) solid var(--black);
  transition: all var(--transition-slow);
  opacity: 1;
  overflow: hidden;
  min-height: 600px;
  position: sticky;
  top: 80px;
  transform-origin: center top;
}

.c-progress-carousel_item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.c-progress-carousel_item.-reverse {
  grid-template-columns: 8fr 4fr;
}

.c-progress-carousel_content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  padding: var(--spacing-3xl);
  justify-content: center;
}

.c-progress-carousel_heading {
  border: none;
  padding: 0;
}

.c-progress-carousel_title {
  font-size: clamp(3.5rem, 7vw, 6rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.04em;
  color: var(--swiss-red);
  line-height: 0.9;
  margin-bottom: var(--spacing-lg);
  transition: color var(--transition-base);
}

.c-progress-carousel_item:hover .c-progress-carousel_title {
  color: var(--black);
}

.c-progress-carousel_subtitle {
  font-size: clamp(1.125rem, 1.8vw, 1.5rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--black);
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.02em;
}

.c-progress-carousel_text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.c-progress-carousel_text p {
  font-size: 1rem;
  line-height: 1.7;
  max-width: none;
  color: var(--black);
}

.c-progress-carousel_cta {
  margin-top: var(--spacing-lg);
  display: none;
}

.c-progress-carousel_visual {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
}

.c-progress-carousel_figure {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border: none;
  background: transparent;
}

.c-progress-carousel_figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  filter: grayscale(0%);
  transition: filter var(--transition-slow);
}

/* Pricing Section */
.c-pricing-section {
  padding: var(--spacing-4xl) 0;
  background: var(--muted);
  border-top: var(--border-width) solid var(--black);
  border-bottom: var(--border-width) solid var(--black);
}

.c-pricing-section .o-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 1600px;
}

.c-section-header {
  text-align: left;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto var(--spacing-4xl) auto;
  padding: 0;
}

.c-section-title {
  font-size: clamp(4rem, 8vw, 8rem);
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.04em;
  color: var(--black);
  line-height: 0.85;
}

.c-section-description {
  font-size: 1rem;
  color: var(--gray-600);
  margin-bottom: var(--spacing-xl);
  max-width: 70ch;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.c-pricing-info-v2 {
  margin-top: var(--spacing-lg);
  text-align: left;
}

.c-price-currency-v2 {
  display: inline-block;
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--gray-100);
  border: var(--border-thin) solid var(--black);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--transition-fast);
}

.c-price-currency-v2:hover {
  background: var(--accent-color);
  color: var(--white);
}

.c-pricing-grid-v2 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.c-pricing-card-v2 {
  position: relative;
  background: var(--white);
  border: var(--border-width) solid var(--swiss-red);
  padding: var(--spacing-2xl);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  min-height: 700px;
  cursor: pointer;
}

.c-pricing-card-v2:hover {
  background: var(--swiss-red);
  border-color: var(--black);
  transform: translateY(-4px);
}

.c-pricing-card-v2:hover .c-card-title-v2,
.c-pricing-card-v2:hover .c-card-subtitle-v2,
.c-pricing-card-v2:hover .c-card-price-v2,
.c-pricing-card-v2:hover .c-features-list-v2,
.c-pricing-card-v2:hover .c-annual-offer-v2 {
  color: var(--white);
}

.c-pricing-card-v2:hover .c-price-large-v2 {
  color: var(--white);
}

.c-pricing-card-v2:hover .c-feature-icon {
  border-color: var(--white);
  color: var(--white);
}

.c-pricing-card-v2:hover .c-feature-lightning {
  background: transparent;
  border: none;
  color: var(--white);
}

.c-pricing-card-v2:hover .c-btn-outline-v2 {
  border-color: var(--white);
  color: var(--white);
}

.c-pricing-card-v2:hover .c-btn-outline-v2:hover {
  background: var(--white);
  color: var(--swiss-red);
}

.c-pricing-card-v2.-featured {
  border-color: var(--swiss-red);
  border-width: var(--border-width);
  background: var(--white);
}

.c-pricing-card-v2.-featured:hover {
  background: var(--swiss-red);
  border-color: var(--black);
}

.c-pricing-card-v2.-featured:hover .c-card-title-v2,
.c-pricing-card-v2.-featured:hover .c-card-subtitle-v2,
.c-pricing-card-v2.-featured:hover .c-price-large-v2,
.c-pricing-card-v2.-featured:hover .c-features-list-v2,
.c-pricing-card-v2.-featured:hover .c-annual-offer-v2 {
  color: var(--white);
}

.c-pricing-card-v2.-featured .c-features-list-v2 li {
  font-weight: 400 !important;
}

.c-pricing-card-v2.-featured .c-features-list-v2 {
  font-weight: 400 !important;
}

.c-card-badge-v2 {
  position: absolute;
  top: -12px;
  right: var(--spacing-lg);
  background: var(--accent-color);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-md);
  border: var(--border-thin) solid var(--black);
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.c-card-header-v2 {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: var(--border-thin) solid var(--gray-300);
}

.c-card-title-v2 {
  font-size: 4rem;
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.04em;
  line-height: 0.9;
  color: var(--black);
  transition: color var(--transition-base);
}

.c-card-subtitle-v2 {
  font-size: 1rem;
  color: var(--gray-600);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.c-card-price-v2 {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-xs);
}

.c-price-large-v2 {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  color: var(--accent-color);
}

.c-price-period-v2 {
  font-size: 1.125rem;
  color: var(--gray-600);
  font-weight: 500;
}

.c-annual-offer-v2 {
  margin-bottom: var(--spacing-xl);
  padding: 0 !important;
  background: transparent !important;
  border: none !important;
}

.c-offer-info-v2 {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--gray-600);
  padding: 0;
  background: transparent;
  border: none;
}

.c-offer-info-v2 p {
  padding: 0;
  margin: 0;
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  text-transform: none !important;
  letter-spacing: normal !important;
  font-weight: 400 !important;
}

.c-annual-link-v2 {
  color: var(--accent-color) !important;
  font-weight: 700 !important;
  cursor: pointer !important;
  transition: color var(--transition-fast);
  text-decoration: underline !important;
  display: inline !important;
  pointer-events: auto !important;
  position: relative;
  z-index: 10;
}

.c-annual-link-v2:hover {
  color: var(--accent-dark) !important;
  text-decoration: underline !important;
}

.c-yearly-badge {
  font-size: 0.9375rem;
  color: var(--accent-color);
  font-weight: 700;
  cursor: pointer;
  margin-top: var(--spacing-md);
  border: none !important;
  background: transparent !important;
  padding: 0 !important;
  box-shadow: none !important;
  text-decoration: underline;
  text-transform: none !important;
  letter-spacing: normal !important;
  display: block;
}

.c-yearly-badge:hover {
  color: var(--accent-dark);
}

.c-card-cta-v2 {
  margin-bottom: var(--spacing-xl);
}

.c-btn-v2 {
  display: inline-block;
  width: 100%;
  padding: var(--spacing-lg) var(--spacing-xl);
  font-weight: 700;
  font-size: 1.125rem;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: var(--border-thin) solid var(--black);
  transition: all var(--transition-fast);
  cursor: pointer;
  background: var(--white);
  color: var(--black);
  box-shadow: 4px 4px 0 var(--black);
}

.c-btn-v2:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--black);
}

.c-btn-primary-v2 {
  background: var(--accent-color);
  color: var(--white);
}

.c-btn-primary-v2:hover {
  background: var(--accent-dark);
}

.c-btn-outline-v2 {
  background: transparent;
  color: var(--black);
}

.c-btn-outline-v2:hover {
  background: var(--gray-100);
}

.c-card-features-v2 {
  flex: 1;
}

.c-features-list-v2 {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.c-features-list-v2 li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  font-size: 1rem;
  line-height: 1.125;
  padding: var(--spacing-xs) 0;
  font-weight: 400;
}

.c-feature-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--accent-color);
  border: 1.5px solid var(--accent-color);
  font-size: 0.75rem;
  margin-top: 2px;
  transition: all var(--transition-fast);
}

.c-feature-icon:hover {
  transform: scale(1.1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.c-feature-cross {
  color: var(--gray-400);
  border-color: var(--gray-400);
  opacity: 0.6;
}

.c-feature-lightning {
  color: var(--accent-color);
  border: none;
  background: transparent;
  font-size: 1rem;
  filter: grayscale(100%) brightness(0.4) sepia(100%) hue-rotate(200deg) saturate(5);
}

.c-feature-lightning:hover {
  transform: scale(1.3);
  filter: grayscale(100%) brightness(0.5) sepia(100%) hue-rotate(200deg) saturate(6);
}

/* Footer */
.c-footer {
  background: var(--black);
  color: var(--white);
  padding: var(--spacing-3xl) 0;
}

.c-footer_inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.c-footer_top {
  margin-bottom: var(--spacing-3xl);
  padding-bottom: var(--spacing-3xl);
  border-bottom: var(--border-thin) solid var(--gray-600);
}

.c-navigation_list {
  list-style: none;
  display: flex;
  flex-wrap: nowrap;
  gap: var(--spacing-lg);
}

.c-navigation_list li {
  list-style: none;
}

.c-navigation_list .c-button.-nav {
  color: var(--white);
  border: none;
}

.c-navigation_list .c-button.-nav::after {
  background: var(--white);
}

.c-navigation_list .c-button.-nav:hover {
  background: transparent;
  color: var(--swiss-red);
}

.c-navigation_list .c-button.-nav:hover::after {
  background: var(--swiss-red);
}

.c-footer_middle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
  gap: var(--spacing-xl);
}

.c-footer_logo_link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--white);
}

.c-footer_logo_img {
  width: 40px;
  height: 40px;
  display: block;
}

.c-footer_logo_text {
  font-size: 1.5rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.c-footer_secondary-nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.c-footer_secondary-nav .c-button.-line {
  color: var(--white);
  border-color: var(--white);
  background: transparent;
  box-shadow: 4px 4px 0 var(--white);
}

.c-footer_secondary-nav .c-button.-line:hover {
  background: var(--accent-color);
  border-color: var(--accent-color);
  box-shadow: 2px 2px 0 var(--white);
}

.c-footer_bottom {
  padding-top: var(--spacing-xl);
  border-top: var(--border-thin) solid var(--gray-600);
  text-align: left;
}

.c-footer_bottom_copyright {
  font-size: 0.875rem;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ========================================
   SWISS TEXTURE PATTERNS - Depth Without Shadows
   ======================================== */

/* Grid Pattern - 24×24px grid lines at 3% opacity */
.swiss-grid-pattern {
  position: relative;
}

.swiss-grid-pattern::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(var(--black) 1px, transparent 1px),
    linear-gradient(90deg, var(--black) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.03;
  pointer-events: none;
  z-index: 0;
}

/* Dot Matrix Pattern - 16×16px spacing, 4% opacity */
.swiss-dots {
  position: relative;
}

.swiss-dots::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(circle, var(--black) 1px, transparent 1px);
  background-size: 16px 16px;
  opacity: 0.04;
  pointer-events: none;
  z-index: 0;
}

/* Diagonal Lines Pattern - 45-degree, 10px spacing, 2% opacity */
.swiss-diagonal {
  position: relative;
}

.swiss-diagonal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: repeating-linear-gradient(
    45deg,
    var(--black),
    var(--black) 1px,
    transparent 1px,
    transparent 10px
  );
  opacity: 0.02;
  pointer-events: none;
  z-index: 0;
}

/* Noise Texture - Fractal noise overlay, 1.5% opacity */
.swiss-noise {
  position: relative;
}

.swiss-noise::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.015;
  pointer-events: none;
  z-index: 0;
}

/* Combined Pattern - Grid + Noise for extra depth */
.swiss-combined {
  position: relative;
}

.swiss-combined::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(var(--black) 1px, transparent 1px),
    linear-gradient(90deg, var(--black) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.03;
  pointer-events: none;
  z-index: 0;
}

.swiss-combined::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.015;
  pointer-events: none;
  z-index: 1;
}

/* Responsive - Mobile First */
@media (max-width: 1400px) {
  .c-pricing-grid-v2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tablet Responsive */
@media (min-width: 769px) and (max-width: 1024px) {
  /* Header Tablet */
  .c-header_inner {
    padding: 0 var(--spacing-xl);
    gap: var(--spacing-2xl);
  }

  .c-header_logo_text {
    font-size: 1.0625rem;
  }

  .c-navigation-line_list {
    gap: var(--spacing-xl);
  }

  .c-button.-nav {
    font-size: 0.875rem;
  }

  /* Hero Tablet */
  .c-hero-video {
    padding: var(--spacing-3xl) var(--spacing-xl);
  }

  .c-hero-video_content {
    padding: var(--spacing-3xl) var(--spacing-2xl);
    max-width: 800px;
  }

  .c-hero-video_title {
    font-size: clamp(3rem, 7vw, 5rem);
  }

  .c-video {
    opacity: 0.6;
  }

  /* Progress Carousel Tablet */
  .c-progress-carousel_item {
    grid-template-columns: 1fr 1fr !important;
    min-height: 500px;
  }

  .c-progress-carousel_title {
    font-size: clamp(3rem, 6vw, 5rem);
  }

  .c-progress-carousel_subtitle {
    font-size: 1.25rem;
  }

  .c-progress-carousel_figure img {
    object-fit: cover;
  }

  /* Pricing Tablet */
  .c-pricing-grid-v2 {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }

  .c-section-title {
    font-size: clamp(3rem, 7vw, 6rem);
  }

  .c-card-title-v2 {
    font-size: 3rem;
  }

  .c-price-large-v2 {
    font-size: 3rem;
  }

  /* Phone Demo iPad - 滿版顯示裁切白框 */
  .c-phone-demo-container {
    height: 800px !important;
    width: 100% !important;
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
    position: relative !important;
    overflow: hidden !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
  }

  .c-phone-demo-image {
    width: 200vw !important;
    max-width: none !important;
    height: auto !important;
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) !important;
    opacity: 1 !important;
    margin: 0 !important;
    display: block !important;
    z-index: 10 !important;
  }

  /* iPad 顯示 UI 圖層並縮小 30% */
  .c-phone-layer {
    display: block !important;
    transform: scale(0.7) !important;
    transform-origin: center center !important;
    z-index: 20 !important;
  }

  /* UI 圖層顯示時保持縮放效果 */
  .c-phone-layer.is-visible {
    opacity: 1 !important;
  }

  /* 左側警報從左邊滑入效果 - iPad 縮小版並往左移 30% */
  .c-phone-layer[data-layer="1"].is-visible,
  .c-phone-layer[data-layer="2"].is-visible,
  .c-phone-layer[data-layer="3"].is-visible,
  .c-phone-layer[data-layer="4"].is-visible {
    transform: scale(0.7) translateX(-30%) !important;
  }

  /* 右側元件往右移 20% */
  .c-phone-layer[data-layer="5"],
  .c-phone-layer[data-layer="6"],
  .c-phone-layer[data-layer="7"] {
    transform: scale(0.7) translateX(20%) !important;
  }

  .c-phone-layer[data-layer="5"].is-visible,
  .c-phone-layer[data-layer="6"].is-visible,
  .c-phone-layer[data-layer="7"].is-visible {
    transform: scale(0.7) translateX(20%) !important;
  }

  /* iPad 顯示首頁人物圖片 */
  #heroCharacter1,
  #heroCharacter2 {
    display: block !important;
  }

  /* 隱藏漢堡選單，顯示完整導航 */
  .c-mobile-menu-toggle,
  .c-hamburger {
    display: none !important;
  }

  .c-header_nav {
    display: flex !important;
    position: static !important;
    max-height: none !important;
    opacity: 1 !important;
  }

  /* 技術卡片圖片高度 */
  .c-progress-carousel_visual {
    min-height: 400px !important;
    max-height: 500px !important;
  }
}

/* iPad Pro 專屬設定 (1024px - 1366px) */
@media (min-width: 1024px) and (max-width: 1366px) {
  /* Phone Demo iPad Pro - 縮小 10% 避免上下被裁切 */
  .c-phone-demo-image {
    width: 180vw !important;
    transform: translate(-50%, -50%) scale(0.9) !important;
  }
}

@media (max-width: 1024px) {
  .c-header_inner {
    flex-wrap: wrap;
  }

  .c-header_nav {
    order: 3;
    flex-basis: 100%;
    justify-content: flex-start;
    margin-top: var(--spacing-lg);
    flex-direction: row;
    gap: var(--spacing-2xl);
  }

  .c-navigation-line_list {
    width: auto;
    justify-content: flex-start;
    gap: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  /* ===== 漢堡選單 Mobile Menu ===== */

  /* 隱藏 checkbox */
  .c-mobile-menu-toggle {
    display: none;
  }

  /* 漢堡按鈕樣式 */
  .c-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    position: relative;
    margin-left: auto;
  }

  .c-hamburger_line {
    width: 30px;
    height: 3px;
    background: var(--black);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
  }

  /* 當選單打開時，漢堡按鈕變成 X */
  .c-mobile-menu-toggle:checked ~ .c-hamburger .c-hamburger_line:nth-child(1) {
    transform: translateY(11px) rotate(45deg);
  }

  .c-mobile-menu-toggle:checked ~ .c-hamburger .c-hamburger_line:nth-child(2) {
    opacity: 0;
  }

  .c-mobile-menu-toggle:checked ~ .c-hamburger .c-hamburger_line:nth-child(3) {
    transform: translateY(-11px) rotate(-45deg);
  }

  /* Header 調整 */
  .c-header_inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    padding: 0 var(--spacing-lg);
  }

  .c-header_title {
    flex: 1;
  }

  /* 導航選單 - 默認隱藏 */
  .c-header_nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: var(--border-width) solid var(--black);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }

  /* 當選單打開時顯示導航 */
  .c-mobile-menu-toggle:checked ~ .c-header_nav {
    max-height: 500px;
    opacity: 1;
  }

  /* 導航列表樣式 */
  .c-navigation-line {
    width: 100%;
  }

  .c-navigation-line_list {
    flex-direction: column;
    width: 100%;
    padding: var(--spacing-lg) 0;
  }

  .c-navigation-line_item {
    width: 100%;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  }

  .c-navigation-line_item:last-child {
    border-bottom: none;
  }

  .c-button.-nav {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    min-height: 48px;
    display: flex;
    align-items: center;
    font-size: 1rem;
  }

  .c-button.-nav:hover,
  .c-button.-nav.-active {
    background: rgba(52, 60, 224, 0.05);
  }

  /* 全局圖片響應式 - 所有圖片等比例縮放，不溢出螢幕 */
  img {
    max-width: 100%;
    height: auto;
  }

  /* 容器防止溢出 */
  * {
    max-width: 100%;
    box-sizing: border-box;
  }

  body,
  html {
    overflow-x: hidden;
    max-width: 100vw;
  }

  /* 所有容器和區塊不超出螢幕 */
  .o-container,
  .c-hero-video,
  .o-section,
  section,
  div {
    max-width: 100%;
  }

  /* 確保大圖片和背景不溢出 */
  .c-hero-video_background,
  .c-video,
  .c-figure img,
  .c-progress-carousel_figure img {
    max-width: 100%;
    width: 100%;
    height: auto;
    object-fit: cover;
  }

  /* Grid System Mobile */
  .o-grid {
    grid-template-columns: 1fr;
  }

  .o-grid_item.-col-1-3,
  .o-grid_item.-col-3-5,
  .o-grid_item.-col-1-9,
  .o-grid_item.-col-9-17 {
    grid-column: 1 / -1;
  }

  /* Header Mobile */
  .c-header {
    padding: var(--spacing-md) 0;
  }

  .c-header_inner {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    padding: 0 var(--spacing-lg);
    gap: 0;
  }

  .c-header_title {
    flex: 1;
  }

  .c-header_logo_img {
    width: 32px;
    height: 32px;
  }

  .c-header_logo_text {
    font-size: 1rem;
  }

  .c-header_nav {
    width: 100%;
    order: 3;
  }

  .c-header_right-link {
    width: 100%;
  }

  .c-navigation-line_list {
    flex-direction: column;
    gap: var(--spacing-md);
    width: 100%;
    align-items: flex-start;
  }

  .c-button.-nav {
    width: auto;
    font-size: 0.875rem;
    padding: var(--spacing-xs) 0;
  }

  .c-header_nav {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-lg);
  }

  /* Hero Section Mobile */
  .c-hero-video {
    min-height: 100vh;
    padding: var(--spacing-3xl) var(--spacing-md);
  }

  .c-hero-video_content {
    padding: var(--spacing-2xl) var(--spacing-lg);
    border-width: var(--border-width);
    max-width: 100%;
  }

  .c-hero-video_title {
    font-size: clamp(2rem, 10vw, 3rem);
    line-height: 0.95;
    margin-bottom: var(--spacing-lg);
  }

  .c-video {
    opacity: 0.5;
  }

  .c-button.-line {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 0.875rem;
  }

  .c-button_icon {
    font-size: 1.25rem;
  }

  /* Introduction Section Mobile */
  .o-section {
    padding: var(--spacing-2xl) 0;
  }

  .c-text.-body-large {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
  }

  .c-video-toggler {
    border-width: var(--border-width);
  }

  .c-figure {
    height: 300px;
  }

  .c-video-toggler_button {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
  }

  /* Progress Carousel Mobile */
  .c-progress-carousel {
    padding: var(--spacing-2xl) 0;
  }

  .c-progress-carousel_inner {
    padding: 0 var(--spacing-md);
  }

  .c-progress-carousel_list {
    gap: var(--spacing-2xl);
  }

  .c-progress-carousel_item {
    grid-template-columns: 1fr !important;
    padding: 0;
    border-width: var(--border-width);
    min-height: auto;
    display: flex;
    flex-direction: column;
  }

  .c-progress-carousel_content {
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
    order: 2;
  }

  .c-progress-carousel_title {
    font-size: clamp(2.5rem, 10vw, 4rem);
    margin-bottom: var(--spacing-md);
  }

  .c-progress-carousel_subtitle {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
  }

  .c-progress-carousel_text {
    gap: var(--spacing-md);
  }

  .c-progress-carousel_text p {
    font-size: 0.9375rem;
  }

  .c-progress-carousel_visual {
    min-height: 200px;
    max-height: 200px;
    order: 1;
    overflow: hidden;
  }

  .c-progress-carousel_figure {
    background: transparent;
    height: 100%;
  }

  .c-progress-carousel_figure img {
    object-fit: cover;
    object-position: center top;
    height: 100%;
    width: 100%;
  }

  /* Pricing Section Mobile */
  .c-pricing-section {
    padding: var(--spacing-2xl) 0;
  }

  .c-section-header {
    margin-bottom: var(--spacing-2xl);
  }

  .c-section-title {
    font-size: clamp(2.5rem, 10vw, 4rem);
    margin-bottom: var(--spacing-md);
  }

  .c-section-description {
    font-size: 0.875rem;
  }

  .c-pricing-grid-v2 {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .c-pricing-card-v2 {
    min-height: auto;
    padding: var(--spacing-xl);
    border-width: var(--border-width);
  }

  .c-card-header-v2 {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
  }

  .c-card-title-v2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
  }

  .c-card-subtitle-v2 {
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
  }

  .c-price-large-v2 {
    font-size: 2.5rem;
  }

  .c-price-period-v2 {
    font-size: 1rem;
  }

  .c-annual-offer-v2 {
    margin-bottom: var(--spacing-md);
  }

  .c-offer-info-v2 {
    font-size: 0.875rem;
  }

  .c-card-cta-v2 {
    margin-bottom: var(--spacing-lg);
  }

  .c-btn-v2 {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
  }

  .c-features-list-v2 {
    gap: var(--spacing-md);
  }

  .c-features-list-v2 li {
    font-size: 0.875rem;
    line-height: 1.0;
    padding: var(--spacing-xs) 0;
  }

  .c-feature-icon {
    width: 18px;
    height: 18px;
    font-size: 0.7rem;
    border-width: 1.5px;
  }

  .c-card-badge-v2 {
    font-size: 0.625rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  /* Footer Mobile */
  .c-footer {
    padding: var(--spacing-2xl) 0;
  }

  .c-footer_top {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
  }

  .c-footer_middle {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
  }

  .c-footer_logo_img {
    width: 32px;
    height: 32px;
  }

  .c-footer_logo_text {
    font-size: 1.25rem;
  }

  .c-footer_secondary-nav ul {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .c-navigation_list {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .c-button.-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.75rem;
  }

  .c-footer_bottom_copyright {
    font-size: 0.75rem;
  }

  /* Button Mobile - Touch Friendly */
  .c-button {
    min-height: 44px;
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .c-button:hover {
    transform: translateY(-2px);
  }

  /* Phone Demo Mobile - 手機版滿版顯示（放大以裁切白邊） */
  .c-phone-demo-container {
    height: auto !important;
    padding: 0 !important;
    display: block !important;
    position: relative !important;
    left: auto !important;
    right: auto !important;
    margin: 0 !important;
    width: 100vw !important;
    max-width: 100vw !important;
    overflow: hidden !important;
  }

  .c-phone-demo-image {
    width: 340vw !important;
    max-width: none !important;
    height: auto !important;
    position: relative !important;
    top: auto !important;
    left: 50% !important;
    transform: translateX(-51%) !important;
    opacity: 1 !important;
    margin: 0 !important;
    display: block !important;
  }

  /* 隱藏首頁人物圖片 - 僅手機版 */
  #heroCharacter1,
  #heroCharacter2 {
    display: none !important;
  }

  /* 隱藏所有 UI 圖層 - 手機版只顯示手機本身 */
  .c-phone-layer {
    display: none !important;
  }

  /* 移動端性能優化 - 禁用浮動動畫 */
  .c-phone-demo-container {
    animation: none;
  }

  /* 統計卡片移動端 */
  .c-stats-grid {
    grid-template-columns: 1fr !important;
    gap: var(--spacing-lg);
  }
}

/* ========================================
   SWISS SECTION NUMBERING SYSTEM
   ======================================== */

.c-section-number {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--swiss-red);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  border: var(--border-thin) solid var(--swiss-red);
  background: transparent;
  transition: all var(--transition-base);
}

.c-section-number:hover {
  background: var(--swiss-red);
  color: var(--white);
  transform: translateY(-2px);
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.u-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.u-text-center {
  text-align: center;
}

.u-text-left {
  text-align: left;
}

.u-uppercase {
  text-transform: uppercase;
}

.u-tracking-tight {
  letter-spacing: -0.03em;
}

.u-tracking-wide {
  letter-spacing: 0.05em;
}

.u-tracking-widest {
  letter-spacing: 0.15em;
}

.u-margin-top-xl {
  margin-top: var(--spacing-xl);
}

.u-margin-bottom-xl {
  margin-bottom: var(--spacing-xl);
}

/* Language Content */
.lang-content {
  width: 100%;
}

/* ===================================================================
   SCROLL ANIMATIONS - Intersection Observer Triggered
   ================================================================ */

/* Animation Variables */
:root {
  --animation-duration: 0.8s;
  --animation-easing: cubic-bezier(.3, 0, .2, 1); /* Fizens easing */
  --animation-distance: 60px;
}

/* Initial Hidden State - Elements before they enter viewport */
.scroll-animate {
  opacity: 0;
  transition: opacity var(--animation-duration) var(--animation-easing),
              transform var(--animation-duration) var(--animation-easing);
  will-change: opacity, transform;
}

/* Fade Up Animation */
.scroll-fade-up {
  transform: translateY(var(--animation-distance));
}

.scroll-fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Fade In Animation */
.scroll-fade-in {
  transform: scale(0.95);
}

.scroll-fade-in.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Slide In from Left */
.scroll-slide-left {
  transform: translateX(calc(var(--animation-distance) * -1));
}

.scroll-slide-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Slide In from Right */
.scroll-slide-right {
  transform: translateX(var(--animation-distance));
}

.scroll-slide-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger Delay Classes for sequential animations */
.scroll-animate:nth-child(1) { transition-delay: 0ms; }
.scroll-animate:nth-child(2) { transition-delay: 100ms; }
.scroll-animate:nth-child(3) { transition-delay: 200ms; }
.scroll-animate:nth-child(4) { transition-delay: 300ms; }
.scroll-animate:nth-child(5) { transition-delay: 400ms; }
.scroll-animate:nth-child(6) { transition-delay: 500ms; }

/* Performance Optimization */
@media (prefers-reduced-motion: reduce) {
  .scroll-animate {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================
   HERO SECTION ENTRANCE ANIMATIONS
   ============================================ */

/* Hero Background - Initial State */
.c-hero-video_background {
  transform: translateY(0);
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Hero Content - Initial Hidden State */
.hero-animate .c-hero-video_content {
  opacity: 0;
  transform: translateY(40px);
}

/* Hero Title - Initial State */
.hero-animate .c-hero-video_title {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s,
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s;
}

.hero-animate .hero-letter {
  opacity: 0;
  transform: translateY(20px) scale(0.8);
}

/* Hero Button - Initial State */
.hero-animate .c-button.-line {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.6s,
              transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.6s;
}

/* Hero Content - Visible State */
.hero-animate.hero-visible .c-hero-video_content {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Hero Title - Visible State */
.hero-animate.hero-visible .c-hero-video_title {
  opacity: 1;
  transform: translateY(0);
}

.hero-animate.hero-visible .hero-letter {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Stagger animation for letters on entrance */
.hero-animate.hero-visible .hero-letter:nth-child(1) { transition-delay: 0.3s; }
.hero-animate.hero-visible .hero-letter:nth-child(2) { transition-delay: 0.35s; }
.hero-animate.hero-visible .hero-letter:nth-child(3) { transition-delay: 0.4s; }
.hero-animate.hero-visible .hero-letter:nth-child(4) { transition-delay: 0.45s; }
.hero-animate.hero-visible .hero-letter:nth-child(5) { transition-delay: 0.5s; }
.hero-animate.hero-visible .hero-letter:nth-child(6) { transition-delay: 0.55s; }
.hero-animate.hero-visible .hero-letter:nth-child(7) { transition-delay: 0.6s; }
.hero-animate.hero-visible .hero-letter:nth-child(8) { transition-delay: 0.65s; }
.hero-animate.hero-visible .hero-letter:nth-child(9) { transition-delay: 0.7s; }
.hero-animate.hero-visible .hero-letter:nth-child(10) { transition-delay: 0.75s; }
.hero-animate.hero-visible .hero-letter:nth-child(11) { transition-delay: 0.8s; }
.hero-animate.hero-visible .hero-letter:nth-child(12) { transition-delay: 0.85s; }
.hero-animate.hero-visible .hero-letter:nth-child(13) { transition-delay: 0.9s; }
.hero-animate.hero-visible .hero-letter:nth-child(14) { transition-delay: 0.95s; }
.hero-animate.hero-visible .hero-letter:nth-child(15) { transition-delay: 1s; }
.hero-animate.hero-visible .hero-letter:nth-child(16) { transition-delay: 1.05s; }
.hero-animate.hero-visible .hero-letter:nth-child(17) { transition-delay: 1.1s; }
.hero-animate.hero-visible .hero-letter:nth-child(18) { transition-delay: 1.15s; }
.hero-animate.hero-visible .hero-letter:nth-child(19) { transition-delay: 1.2s; }
.hero-animate.hero-visible .hero-letter:nth-child(20) { transition-delay: 1.25s; }
.hero-animate.hero-visible .hero-letter:nth-child(n+21) { transition-delay: 1.3s; }

/* Hero Button - Visible State */
.hero-animate.hero-visible .c-button.-line {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   PRICING CARDS STAGGER ANIMATIONS
   ============================================ */

/* Pricing Cards - Initial Hidden State */
.c-pricing-card-v2.pricing-animate {
  opacity: 0;
  transform: translateY(60px) scale(0.95);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Pricing Cards - Visible State */
.c-pricing-card-v2.pricing-animate.pricing-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Featured Card (VIP) - Special Emphasis */
.c-pricing-card-v2.-featured.pricing-animate {
  transform: translateY(60px) scale(0.92);
}

.c-pricing-card-v2.-featured.pricing-animate.pricing-visible {
  transform: translateY(0) scale(1);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Hover state adjustment for featured card */
.c-pricing-card-v2.-featured.pricing-visible:hover {
  transform: translateY(-8px) scale(1);
}


/* Fixed Bottom Gradient Effect */
.bottom-gradient {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 300px;
  background: linear-gradient(to bottom,
    rgba(52, 60, 224, 0) 0%,
    rgba(52, 60, 224, 0.02) 15%,
    rgba(52, 60, 224, 0.05) 25%,
    rgba(52, 60, 224, 0.1) 35%,
    rgba(52, 60, 224, 0.18) 45%,
    rgba(52, 60, 224, 0.3) 55%,
    rgba(52, 60, 224, 0.45) 65%,
    rgba(52, 60, 224, 0.6) 75%,
    rgba(52, 60, 224, 0.75) 85%,
    rgba(52, 60, 224, 0.88) 95%,
    rgba(52, 60, 224, 0.95) 100%);
  pointer-events: none;
  z-index: 9999;
}

/* Mouse Trail Canvas - 已停用 */
#mouseTrailCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9998;
  display: none; /* 隱藏滑鼠軌跡線條 */
}

/* 觸摸設備隱藏滑鼠軌跡 */
@media (hover: none) and (pointer: coarse) {
  #mouseTrailCanvas {
    display: none;
  }
}

/* Phone Demo Container */
.c-phone-demo-container {
  position: relative;
  width: 100%;
  max-width: 2400px;
  height: 1600px;
  margin: 0 auto;
  background: transparent;
  overflow: visible;
}

.c-phone-demo-image {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 2400px;
  height: auto;
  object-fit: contain;
  opacity: 0;
  transition: opacity 0.8s ease-out;
}

.c-phone-demo-image.is-visible {
  opacity: 1;
  transform: translate(-50%, -50%);
}

/* 動態圖層樣式 */
.c-phone-layer {
  position: absolute;
  width: auto;
  height: auto;
  max-width: 15%;
  opacity: 0;
  transform: translateY(30px);
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
  transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
}

.c-phone-layer.is-visible {
  opacity: 1;
  transform: translateY(0);
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
}

/* 每個圖層的延遲時間 */
.c-phone-layer[data-layer="1"] { transition-delay: 0.1s; }
.c-phone-layer[data-layer="2"] { transition-delay: 0.2s; }
.c-phone-layer[data-layer="3"] { transition-delay: 0.3s; }
.c-phone-layer[data-layer="4"] { transition-delay: 0.4s; } /* alert 4 */
.c-phone-layer[data-layer="5"] { transition-delay: 0.5s; } /* hi 先出現 */
.c-phone-layer[data-layer="6"] { transition-delay: 1.3s; } /* hello 延遲出現，模擬打字效果 */
.c-phone-layer[data-layer="7"] { transition-delay: 0.7s; } /* bingo */

/* 左側警報從左邊滑入效果 */
.c-phone-layer[data-layer="1"],
.c-phone-layer[data-layer="2"],
.c-phone-layer[data-layer="3"],
.c-phone-layer[data-layer="4"] {
  transform: translateX(-100px);
  opacity: 0;
}

.c-phone-layer[data-layer="1"].is-visible,
.c-phone-layer[data-layer="2"].is-visible,
.c-phone-layer[data-layer="3"].is-visible,
.c-phone-layer[data-layer="4"].is-visible {
  transform: translateX(0);
  opacity: 1;
}

/* 聊天氣泡效果 */
.c-chat-bubble {
  background: #667eea;
  padding: 16px 20px;
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  position: relative;
}

.c-chat-bubble.is-visible {
  filter: drop-shadow(0 2px 8px rgba(102, 126, 234, 0.3));
}

/* 氣泡尖角 - 右下角 */
.c-chat-bubble::after {
  content: '';
  position: absolute;
  bottom: -8px;
  right: 20px;
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid #667eea;
}

/* Bingo 遊戲室震動效果 */
@keyframes shake {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  10% { transform: translateY(-2px) rotate(-1deg); }
  20% { transform: translateY(2px) rotate(1deg); }
  30% { transform: translateY(-2px) rotate(-1deg); }
  40% { transform: translateY(2px) rotate(1deg); }
  50% { transform: translateY(-2px) rotate(0deg); }
  60% { transform: translateY(2px) rotate(-1deg); }
  70% { transform: translateY(-2px) rotate(1deg); }
  80% { transform: translateY(2px) rotate(-1deg); }
  90% { transform: translateY(-2px) rotate(1deg); }
}

.c-phone-layer[data-layer="7"].is-visible {
  animation: shake 0.6s ease-in-out infinite;
}

/* 輕微浮動呼吸效果 */
@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* 應用浮動效果到整個手機 demo 容器 */
.c-phone-demo-container {
  animation: float 4s ease-in-out infinite;
}