/* ==========================================================================
   009Chat Website - Main Stylesheet
   ========================================================================== */

/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
  /* Primary Colors */
  --primary-color: #57ACE2;      /* Tech Blue */
  --primary-light: #7BC0E9;      /* Light Blue */
  --primary-dark: #3A8FC7;       /* Dark Blue */
  
  /* Functional Colors */
  --success-color: #00B292;      /* Emerald - Success/Earnings */
  --warning-color: #B26500;      /* Orange - Warning */
  --danger-color: #F76356;       /* Coral - Risk Warning */
  
  /* Neutral Colors */
  --text-primary: #1A1A1A;       /* Primary Text */
  --text-secondary: #666666;     /* Secondary Text */
  --text-muted: #999999;         /* Muted Text */
  --background: #FFFFFF;         /* Background */
  --background-alt: #F8F9FA;     /* Alt Background */
  --border-color: #E0E0E0;       /* Border */
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #57ACE2 0%, #00B292 100%);
  --gradient-success: linear-gradient(135deg, #00B292 0%, #00D4A4 100%);
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-chinese: "PingFang SC", "Microsoft YaHei", "微软雅黑", sans-serif;
  
  /* Font Sizes */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 1.875rem;   /* 30px */
  --text-4xl: 2.25rem;    /* 36px */
  --text-5xl: 3rem;       /* 48px */
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;    /* 4px - 小元素 */
  --radius-md: 0.5rem;     /* 8px - 普通元素 */
  --radius-lg: 0.75rem;    /* 12px - 卡片 */
  --radius-xl: 1rem;       /* 16px - 大卡片 */
  --radius-2xl: 1.25rem;   /* 20px - 特殊元素 */
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.12);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

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

* {
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary), var(--font-chinese);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  background: none;
  border: none;
  outline: none;
  color: inherit;
  font: inherit;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
}

/* iOS Safari button reset */
button[type="button"],
.faq-item__question {
  color: var(--text-primary) !important;
  background: transparent !important;
  border: 0 !important;
  outline: none !important;
  -webkit-appearance: none !important;
  -moz-appearance: none !important;
  appearance: none !important;
  -webkit-tap-highlight-color: transparent !important;
  text-decoration: none !important;
  font-family: inherit !important;
  font-size: inherit !important;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--spacing-md);
}

.text-gradient {
  color: #57ACE2;
}

/* ==========================================================================
   Font Optimization
   ========================================================================== */

/* System fonts are already optimized in our font stacks */
/* Additional optimizations for better rendering */

/* Optimize CJK (Chinese/Japanese/Korean) font rendering */
:lang(zh) {
  font-family: var(--font-chinese), var(--font-primary);
  word-break: break-all;
  line-break: strict;
}

/* Font loading states */
.system-fonts body {
  /* Already using system fonts, no optimization needed */
  font-family: var(--font-primary), var(--font-chinese);
}

/* If custom fonts are added in the future */
.fonts-loading body {
  /* Use system fonts while custom fonts load */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.fonts-loaded body {
  /* Apply custom fonts after loading */
  font-family: var(--font-primary), var(--font-chinese);
}

/* Prevent font-size boosting on mobile */
@media (max-width: 768px) {
  body {
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
  }
}

/* Optimize font performance for slow connections */
@media (prefers-reduced-data: reduce) {
  body {
    /* Fall back to most basic system fonts */
    font-family: -apple-system, system-ui, sans-serif;
  }
}

/* High DPI screen optimizations */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

/* ==========================================================================
   Components - Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 1.5rem;
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: #57ACE2;
  color: white;
  box-shadow: 0 4px 6px rgba(87, 172, 226, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(87, 172, 226, 0.35);
  background: #4A90E2;
}

.btn-secondary {
  background: white;
  color: var(--primary-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--text-sm);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: #ffffff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
}

.navbar--scrolled {
  background: #ffffff;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar__wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  min-height: 70px;
}

.navbar__logo {
  display: flex;
  align-items: center;
  z-index: 2;
}

.navbar__logo img {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
}

.navbar__list {
  display: flex;
  gap: var(--spacing-xl);
}

.navbar__list a {
  color: var(--text-primary);
  font-weight: var(--font-medium);
  transition: color var(--transition-base);
  position: relative;
  padding: 0.25rem 0;
}

.navbar__list a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width var(--transition-base);
}

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

.navbar__list a:hover::after {
  width: 100%;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.language-switcher {
  position: relative;
}

.language-dropdown {
  position: relative;
  display: inline-block;
}

.language-dropdown__trigger {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: transparent;
  border: none;
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-base);
  min-width: 120px;
  justify-content: space-between;
}

.language-dropdown__trigger:hover {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transform: translateY(-1px);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.language-dropdown__trigger:focus {
  outline: none !important;
  box-shadow: none !important;
  border: none !important;
}

.language-dropdown__trigger .fa-globe {
  color: var(--primary-color);
  font-size: 1rem;
}

.language-dropdown__current {
  color: var(--text-primary);
  white-space: nowrap;
}

.language-dropdown__arrow {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: transform var(--transition-base);
}

.language-dropdown__trigger[aria-expanded="true"] .language-dropdown__arrow {
  transform: rotate(180deg);
}

.language-dropdown__menu {
  position: absolute;
  top: calc(100% + 0.25rem);
  left: 0;
  right: 0;
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
  min-width: 140px;
}

.language-dropdown__trigger[aria-expanded="true"] + .language-dropdown__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-dropdown__option {
  display: block;
  width: 100%;
  padding: 0.875rem 1.25rem;
  background: none;
  border: none;
  text-align: left;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  font-weight: var(--font-normal);
}

.language-dropdown__option:hover {
  background: rgba(87, 172, 226, 0.05);
  color: var(--primary-color);
}

.language-dropdown__option:not(:last-child) {
  border-bottom: none;
}

.language-dropdown__option.active {
  color: var(--primary-color);
  font-weight: var(--font-medium);
  background: transparent;
}

/* 键盘导航样式 */
.language-dropdown__option:focus {
  background: rgba(87, 172, 226, 0.05);
  color: var(--primary-color);
  outline: none !important;
  border: none !important;
  box-shadow: none !important;
}

/* 键盘导航样式 */
.language-dropdown__option:focus:not(.active) {
  background: rgba(87, 172, 226, 0.05);
  color: var(--primary-color);
  outline: none !important;
  border: none !important;
  box-shadow: none !important;
}

.language-dropdown__option.active:focus {
  color: var(--primary-color);
  background: rgba(87, 172, 226, 0.1);
  outline: none !important;
  border: none !important;
  box-shadow: none !important;
}

/* 删除旧的语言切换器样式 */
.lang-btn {
  display: none;
}

.divider {
  display: none;
}

/* Mobile Navigation */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 0.5rem;
  z-index: 2;
}

.navbar__toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar__toggle--active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar__toggle--active span:nth-child(2) {
  opacity: 0;
}

.navbar__toggle--active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
}

.hero__bg picture {
  width: 100%;
  height: 100%;
  display: block;
}

.hero__bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero__bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(87, 172, 226, 0.8) 0%, 
    rgba(87, 172, 226, 0.7) 50%,
    rgba(0, 178, 146, 0.6) 100%);
  mix-blend-mode: multiply;
}

.hero__bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 1;
}

.hero__content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  padding: 0 var(--spacing-md);
}

.hero__title {
  font-size: var(--text-5xl);
  margin-bottom: var(--spacing-xl);
  color: white;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero__subtitle {
  font-size: var(--text-xl);
  color: white;
  margin-bottom: var(--spacing-3xl);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
  font-weight: var(--font-medium);
  opacity: 0.95;
}

.hero__stats {
  display: flex;
  justify-content: center;
  gap: clamp(var(--spacing-lg), 3vw, var(--spacing-2xl));
  margin-bottom: var(--spacing-3xl);
  flex-wrap: wrap;
  padding: 0 var(--spacing-md);
}

.stat-item {
  text-align: center;
  color: white;
  flex: 1;
  min-width: 120px;
  max-width: 200px;
}

.stat-item__number,
.stat-item__plus,
.stat-item__currency,
.stat-item__percent {
  font-size: clamp(var(--text-2xl), 3.5vw, 3rem);
  font-weight: var(--font-bold);
  color: white;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  line-height: 0.9;
  letter-spacing: -0.02em;
  display: inline-block;
}

.stat-item__label {
  font-size: var(--text-base);
  color: white;
  opacity: 0.9;
  margin-top: var(--spacing-md);
  display: block;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
  font-weight: var(--font-medium);
  letter-spacing: 0.02em;
}

.hero__actions {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-md);
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  font-size: 1.5rem;
  animation: bounce 2s infinite;
  opacity: 0.8;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

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

/* ==========================================================================
   Section Styles
   ========================================================================== */
section {
  padding: 4rem 0;
}

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

.section-title {
  font-size: var(--text-4xl);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about {
  background: var(--background-alt);
}

.about__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about__text p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

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

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

.feature-item i {
  color: var(--success-color);
  font-size: var(--text-xl);
}

.about__image {
  width: 100%;
  height: auto;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}

.about__image:hover img {
  transform: scale(1.05);
}

/* ==========================================================================
   Advantages Section
   ========================================================================== */
.advantages__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

.advantage-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

.advantage-card__icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-lg);
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  color: white;
}

/* 为不同的优势卡片设置不同的图标颜色 */
.advantage-card:nth-child(1) .advantage-card__icon {
  background: #57ACE2;
}

.advantage-card:nth-child(2) .advantage-card__icon {
  background: #00B292;
}

.advantage-card:nth-child(3) .advantage-card__icon {
  background: #F79E56;
}

.advantage-card:nth-child(4) .advantage-card__icon {
  background: #D66C58;
}

.advantage-card:nth-child(5) .advantage-card__icon {
  background: #57ACE2;
}

.advantage-card:nth-child(6) .advantage-card__icon {
  background: #00B292;
}

.advantage-card__title {
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-md);
}

.advantage-card__desc {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ==========================================================================
   Process Section
   ========================================================================== */
.process {
  padding: 4rem 0;
  background: var(--background-alt);
  position: relative;
  overflow: hidden;
}

.process::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
  opacity: 0.05;
  animation: rotate 30s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Process Visual */
.process__visual {
  margin: 3rem 0;
  text-align: center;
}

.process__svg {
  max-width: 100%;
  height: auto;
  filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.1));
}

.desktop-only {
  display: block;
}

.mobile-only {
  display: none;
}

/* Process Details */
.process__details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin: 4rem 0;
}

.process-detail {
  display: flex;
  gap: 1.5rem;
  padding: 2rem;
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.process-detail:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.process-detail__icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #57ACE2;
  border-radius: var(--radius-xl);
  font-size: 1.5rem;
  color: white;
  box-shadow: 0 4px 12px rgba(87, 172, 226, 0.3);
}

.process-detail__icon--highlight {
  background: #57ACE2;
  box-shadow: 0 4px 12px rgba(87, 172, 226, 0.3);
}

.process-detail__content {
  flex: 1;
}

.process-detail__content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.process-detail__content p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.process-detail__time {
  font-size: 0.875rem;
  color: var(--primary-color);
  font-weight: var(--font-medium);
}

.process-detail__time i {
  margin-right: 0.25rem;
}

/* Process Highlights */
.process__highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.highlight-card {
  text-align: center;
  padding: 2rem;
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

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

.highlight-card i {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
  display: block;
}

.highlight-card h4 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.highlight-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .desktop-only {
    display: none;
  }
  
  .mobile-only {
    display: block;
  }
  
  .process__svg--mobile {
    max-width: 90%;
    margin: 0 auto;
  }
  
  .process__details {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .process-detail {
    padding: 1.5rem;
  }
  
  .process-detail__icon {
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
  }
  
  .process__highlights {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .highlight-card {
    padding: 1.5rem;
  }
  
  .highlight-card i {
    font-size: 2.5rem;
  }
}

@media (max-width: 480px) {
  .process {
    padding: 2.5rem 0;
  }
  
  .process__details {
    margin: 2rem 0;
  }
  
  .process-detail {
    flex-direction: column;
    text-align: center;
  }
  
  .process-detail__icon {
    margin: 0 auto 1rem;
  }
}

/* ==========================================================================
   Testimonials Section
   ========================================================================== */
.testimonials__slider {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.testimonial-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

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

.testimonial-card__header {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  min-height: 65px;
}

.testimonial-card__avatar {
  width: 65px;
  height: 65px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: transform var(--transition-base);
  display: block;
  flex-shrink: 0;
  align-self: center;
}

.testimonial-card:hover .testimonial-card__avatar {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.testimonial-card__info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.testimonial-card__name {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  margin-bottom: 0.25rem;
  line-height: 1.3;
}

.testimonial-card__role {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.3;
  margin: 0;
}

.testimonial-card__text {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.testimonial-card__stats {
  display: flex;
  gap: var(--spacing-lg);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.testimonial-card__stats i {
  color: var(--primary-color);
  margin-right: var(--spacing-xs);
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq {
  background: var(--background-alt);
}

.faq__accordion {
  max-width: 100%;
  width: 100%;
  margin: 0 auto;
}

.faq-item {
  background: white;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  width: 100%;
  transition: all var(--transition-base);
}

.faq-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.faq-item__question {
  width: 100%;
  padding: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  text-align: left;
  transition: all var(--transition-base);
  color: var(--text-primary) !important;
  background: none !important;
  border: none !important;
  outline: none !important;
  -webkit-appearance: none !important;
  -moz-appearance: none !important;
  appearance: none !important;
  -webkit-tap-highlight-color: transparent !important;
}

.faq-item__question:hover {
  background: transparent;
}

.faq-item__question i {
  transition: transform var(--transition-base);
}

.faq-item__question[aria-expanded="true"] i {
  transform: rotate(180deg);
}

.faq-item__answer {
  padding: 0 var(--spacing-lg);
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item__answer p {
  padding-bottom: var(--spacing-lg);
  color: var(--text-secondary);
}

.faq-item__question[aria-expanded="true"] + .faq-item__answer {
  max-height: 300px;
}

/* ==========================================================================
   Dashboard Section
   ========================================================================== */
.dashboard__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.dashboard-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.dashboard-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: var(--gradient-primary);
}

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

.dashboard-card i {
  font-size: var(--text-3xl);
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.dashboard-card__title {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.dashboard-card__number {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.dashboard-card__unit {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact {
  background: white;
}

.contact__cards {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.contact-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
}

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

.contact-card__icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-xl);
  font-size: 1.5rem;
  color: white;
  position: relative;
}

.contact-card__icon--phone {
  background: #00B292;
}

.contact-card__icon--email {
  background: #F79E56;
}

.contact-card__icon--telegram {
  background: #57ACE2;
}

.contact-card__icon--telegram i {
  font-size: 1.75rem;
}

.contact-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.contact-card__desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.contact-card__info {
  margin-bottom: var(--spacing-lg);
}

.contact-card__info span {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--primary-color);
  display: inline-block;
  padding: 0;
  background: transparent;
  border-radius: 0;
}

.contact-link {
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-base);
  border-radius: var(--radius-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  margin: -var(--spacing-xs) -var(--spacing-sm);
  display: inline-block;
}

.contact-link:hover {
  background: rgba(87, 172, 226, 0.08);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(87, 172, 226, 0.2);
}

.contact-link:active {
  transform: translateY(0);
}

.contact-card__action {
  margin-top: var(--spacing-lg);
}

.contact-card__action .btn {
  min-width: 120px;
  font-weight: var(--font-medium);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--text-primary);
  color: white;
  padding: var(--spacing-lg) 0;
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__logo {
  height: 30px;
  width: auto;
  object-fit: contain;
  margin-bottom: 1rem;
}

.footer__copyright {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8);
}

.footer__links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer__links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.3s ease;
  font-size: 1.4rem;
}

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

/* ==========================================================================
   Animations
   ========================================================================== */
[data-animate] {
  opacity: 0;
}

.animated {
  animation-duration: 0.8s;
  animation-fill-mode: both;
}

.fadeIn {
  animation-name: fadeIn;
}

.fadeInUp {
  animation-name: fadeInUp;
}

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

/* ==========================================================================
   Responsive Styles
   ========================================================================== */
@media (max-width: 991px) {
  .navbar__toggle {
    display: flex;
  }
  
  .navbar__menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--spacing-xl);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }
  
  .navbar__menu--active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .navbar__list {
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-md);
  }
  
  .navbar__list a {
    display: block;
    padding: var(--spacing-sm) 0;
  }
  
  .navbar__actions {
    margin-top: var(--spacing-lg);
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-md);
  }
  
  .navbar__actions .btn {
    width: 100%;
  }
  
  /* 移动端语言切换器样式 */
  .language-switcher {
    width: 100%;
  }
  
  .language-dropdown__trigger {
    width: 100%;
    justify-content: center;
    min-width: auto;
    outline: none !important;
    border: none !important;
    box-shadow: none !important;
  }
  
  .language-dropdown__trigger:focus {
    outline: none !important;
    border: none !important;
    box-shadow: none !important;
  }

  .language-dropdown__menu {
    left: 50%;
    transform: translateX(-50%) translateY(-2px);
    width: 140px;
    min-width: 140px;
  }

  .language-dropdown__trigger[aria-expanded="true"] + .language-dropdown__menu {
    transform: translateX(-50%) translateY(0);
  }
}

@media (max-width: 768px) {
  :root {
    --text-5xl: 2.5rem;
    --text-4xl: 2rem;
    --text-3xl: 1.5rem;
  }
  
  section {
    padding: 3rem 0;
  }
  
  .hero__content {
    max-width: 100%;
    padding: 0 var(--spacing-sm);
  }
  
  .hero__title {
    font-size: clamp(2rem, 8vw, var(--text-5xl));
    margin-bottom: var(--spacing-lg);
  }
  
  .hero__subtitle {
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-2xl);
  }
  
  .hero__stats {
    flex-direction: column;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    padding: 0;
  }
  
  .stat-item {
    min-width: auto;
    max-width: none;
  }
  
  .stat-item__label {
    font-size: var(--text-sm);
    margin-top: var(--spacing-sm);
  }
  
  .about__content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
  
  .about__image {
    margin-top: var(--spacing-xl);
  }
  
  .about__image img {
    max-height: 400px;
    object-position: center;
  }
  
  .advantages__grid {
    grid-template-columns: 1fr;
  }
  
  .process__timeline {
    grid-template-columns: 1fr;
  }
  
  .process-step:not(:last-child)::after {
    display: none;
  }
  
  .testimonials__slider {
    grid-template-columns: 1fr;
  }
  
  .dashboard__grid {
    grid-template-columns: 1fr;
  }
  
  .contact__cards {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .contact-card {
    padding: var(--spacing-xl) var(--spacing-md);
  }
  
  .contact-card__icon {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }
  
  .footer__content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-lg);
  }
  
  /* FAQ移动端调整 */
  .faq__accordion {
    padding: 0;
  }
  
  .faq-item {
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-lg);
  }
  
  .faq-item__question {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--text-base);
    line-height: 1.4;
    min-height: 56px;
    color: var(--text-primary) !important;
    background: none !important;
    border: none !important;
    outline: none !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    appearance: none !important;
    -webkit-tap-highlight-color: transparent !important;
  }
  
  .faq-item__answer {
    padding: 0 var(--spacing-lg);
  }
  
  .faq-item__answer p {
    padding-bottom: var(--spacing-lg);
    font-size: var(--text-base);
    line-height: 1.6;
  }
}

@media (max-width: 575px) {
  section {
    padding: 2.5rem 0;
  }
  
  .hero__content {
    padding: 0 var(--spacing-xs);
  }
  
  .hero__title {
    font-size: clamp(1.75rem, 10vw, 2.5rem);
    line-height: 1.2;
  }
  
  .hero__subtitle {
    font-size: var(--text-base);
  }
  
  .hero__stats {
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
  }
  
  .hero__actions {
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-md);
  }
  
  .hero__actions .btn {
    width: 100%;
    min-height: 48px;
  }
  
  /* 联系信息小屏幕调整 */
  .contact-card {
    padding: var(--spacing-lg);
    text-align: center;
  }
  
  .contact-card__icon {
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
  }
  
  /* FAQ小屏幕调整 */
  .faq-item__question {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--text-base);
    line-height: 1.4;
    min-height: 56px;
    color: var(--text-primary) !important;
    background: none !important;
    border: none !important;
    outline: none !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    appearance: none !important;
    -webkit-tap-highlight-color: transparent !important;
  }
  
  .faq-item__answer {
    padding: 0 var(--spacing-lg);
  }
  
  .faq-item__answer p {
    padding-bottom: var(--spacing-lg);
    font-size: var(--text-base);
    line-height: 1.6;
  }
}

/* ==========================================================================
   Loading States & Image Optimization
   ========================================================================== */
.lazyload {
  opacity: 1;
  transition: opacity var(--transition-slow);
  background: #f0f0f0;
  position: relative;
}

/* Blur-up effect for lazy loading */
.lazyload::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: inherit;
  filter: blur(5px);
  transition: opacity var(--transition-slow);
  opacity: 0;
}

.lazyload.loaded {
  opacity: 1;
  background: none;
}

.lazyload.loaded::before {
  opacity: 0;
}

/* WebP support detection classes */
.webp .webp-bg {
  background-image: var(--webp-image);
}

.no-webp .webp-bg {
  background-image: var(--fallback-image);
}

/* Responsive image container */
.image-container {
  position: relative;
  overflow: hidden;
  background: #f5f5f5;
}

.image-container img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

.image-container:hover img {
  transform: scale(1.05);
}

/* Aspect ratio containers for preventing layout shift */
/* Note: These are optional containers, not required for all images */
.aspect-ratio-16-9 {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  overflow: hidden;
}

.aspect-ratio-4-3 {
  position: relative;
  padding-bottom: 75%; /* 4:3 */
  overflow: hidden;
}

.aspect-ratio-1-1 {
  position: relative;
  padding-bottom: 100%; /* 1:1 */
  overflow: hidden;
}

.aspect-ratio-16-9 > img,
.aspect-ratio-4-3 > img,
.aspect-ratio-1-1 > img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Loading skeleton animation */
@keyframes skeleton-loading {
  0% {
    background-color: #f0f0f0;
  }
  50% {
    background-color: #e0e0e0;
  }
  100% {
    background-color: #f0f0f0;
  }
}

.skeleton {
  animation: skeleton-loading 1.5s ease-in-out infinite;
  background: #f0f0f0;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Alert Messages
   ========================================================================== */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.alert--success {
  background: rgba(0, 178, 146, 0.1);
  color: var(--success-color);
  border: 1px solid var(--success-color);
}

.alert--error {
  background: rgba(247, 99, 86, 0.1);
  color: var(--danger-color);
  border: 1px solid var(--danger-color);
}

/* ==========================================================================
   Accessibility
   ========================================================================== */
:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  border-radius: var(--radius-md);
}

.skip-link:focus {
  top: 10px;
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
  .navbar,
  .hero__scroll-indicator,
  .footer__links,
  .contact__form {
    display: none;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.5;
  }
  
  a {
    text-decoration: underline;
  }
  
  .container {
    max-width: 100%;
  }
}

/* ==========================================================================
   Compliance Components
   ========================================================================== */

/* Cookie Consent Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    padding: 1.5rem 0;
    z-index: 1000;
    transform: translateY(100%);
    transition: transform 0.3s ease-in-out;
}

.cookie-banner.visible {
    transform: translateY(0);
}

.cookie-banner__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.cookie-banner__content p {
    margin: 0;
    flex: 1;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.cookie-banner__actions {
    display: flex;
    gap: 1rem;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .cookie-banner__content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .cookie-banner__actions {
        justify-content: center;
    }
}

/* Privacy Policy Page */
.privacy-policy {
    padding: 6rem 0 4rem;
    min-height: calc(100vh - 80px);
}

.privacy-policy__header {
    text-align: center;
    margin-bottom: 3rem;
}

.privacy-policy__header h1 {
    font-size: var(--text-4xl);
    margin-bottom: 0.5rem;
}

.privacy-policy__date {
    color: var(--text-secondary);
    font-size: var(--text-sm);
}

.privacy-policy__content {
    max-width: 800px;
    margin: 0 auto;
}

.privacy-section {
    margin-bottom: 2.5rem;
}

.privacy-section h2 {
    font-size: var(--text-2xl);
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.privacy-section p {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.privacy-section ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.privacy-section li {
    margin-bottom: 0.5rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* Footer Updates for Compliance */
.footer__links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer__links .divider {
    margin: 0 1rem;
    color: var(--text-muted);
}

.footer__disclaimer a {
    color: var(--primary-color);
    text-decoration: underline;
}

.footer__disclaimer a:hover {
    text-decoration: none;
}

/* ==========================================================================
   Language Support
   ========================================================================== */
/* Default - show Chinese content */
.lang-zh {
  display: block !important;
}

.lang-en {
  display: none !important;
}

/* When English is active */
html[lang="en-US"] .lang-zh {
  display: none !important;
}

html[lang="en-US"] .lang-en {
  display: block !important;
}

/* Keep inline elements inline */
.lang-zh:not(img):not(div),
.lang-en:not(img):not(div) {
  display: inline !important;
}

html[lang="en-US"] .lang-zh:not(img):not(div) {
  display: none !important;
}

html[lang="en-US"] .lang-en:not(img):not(div) {
  display: inline !important;
}

/* ==========================================================================
   iOS Safari Specific Fixes
   ========================================================================== */
@supports (-webkit-touch-callout: none) {
  /* This targets iOS Safari specifically */
  
  button,
  .faq-item__question {
    color: var(--text-primary) !important;
    background: none !important;
    border: none !important;
    outline: none !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    appearance: none !important;
    -webkit-tap-highlight-color: transparent !important;
    text-decoration: none !important;
    font-family: inherit !important;
  }
  
  .faq-item__question span {
    color: var(--text-primary) !important;
  }
}

/* Additional iOS fixes */
@media screen and (-webkit-min-device-pixel-ratio: 0) {
  .faq-item__question {
    color: #1A1A1A !important;
    background: transparent !important;
    border: none !important;
    -webkit-appearance: none !important;
    appearance: none !important;
  }
  
  .faq-item__question * {
    color: #1A1A1A !important;
  }
}