/* =====================================================
   GWSITA - OpenAI Style Modern CSS
   现代化旅行社网站样式
   ===================================================== */

/* ===================
   CSS Variables & Theme
   ======================= */
:root {
  /* Colors - Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f7f7f8;
  --bg-tertiary: #ececf1;
  --bg-elevated: #ffffff;
  --bg-hover: #f4f4f6;
  --bg-active: #e8e8eb;

  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  --text-inverse: #ffffff;

  --border-color: #e5e5e5;
  --border-subtle: #f0f0f0;

  --accent: #10a37f;
  --accent-hover: #0d8a6a;
  --accent-light: rgba(16, 163, 127, 0.1);

  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-glow: radial-gradient(circle at 30% 50%, rgba(102, 126, 234, 0.15), transparent 50%);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #212121;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --bg-elevated: #2a2a2a;
    --bg-hover: #333333;
    --bg-active: #404040;

    --text-primary: #f5f5f5;
    --text-secondary: #a0a0a0;
    --text-tertiary: #707070;
    --text-inverse: #1a1a1a;

    --border-color: #404040;
    --border-subtle: #333333;

    --accent: #10a37f;
    --accent-hover: #12c496;
    --accent-light: rgba(16, 163, 127, 0.15);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.25), 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3), 0 4px 10px rgba(0, 0, 0, 0.25);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.35);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
}

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

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

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

ul, ol {
  list-style: none;
}

/* ===================
   Typography
   ======================= */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================
   Container
   ======================= */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 800px;
}

.container-wide {
  max-width: 1400px;
}

/* ===================
   Header / Navigation
   ======================= */
.refresh-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
  min-height: 50px;
}

.refresh-header.is-sticky {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
}

.refresh-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
}

.refresh-nav .navbar-brand {
  display: flex;
  align-items: center;
  padding: 0;
}

.refresh-nav .navbar-brand img {
  height: 40px;
  width: auto;
  filter: brightness(0) invert(1);
}

.refresh-nav .navbar-collapse {
  display: flex;
  align-items: center;
  gap: 8px;
}

.refresh-nav .navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-direction: row;
}

.refresh-nav .nav-item {
  margin: 0;
}

.refresh-nav .nav-link {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: #cccccc;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.refresh-nav .nav-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.refresh-nav .nav-link.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
}

.refresh-nav .theme-btn {
  margin-left: 12px;
}

/* ===================
   Buttons
   ======================= */
.theme-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-inverse);
  background: var(--text-primary);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.theme-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--text-inverse);
  background: #333333;
}

.theme-btn:active {
  transform: translateY(0);
}

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

.theme-btn-ghost:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  border-color: var(--text-primary);
}

.theme-btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

.theme-btn-lg {
  padding: 16px 32px;
  font-size: 17px;
}

/* ===================
   Hero Section
   ======================= */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 24px 0 16px;
  background: var(--bg-primary);
  overflow: visible;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero-title {
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-lead {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.hero-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.hero-feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--accent-light);
  color: var(--accent);
  flex-shrink: 0;
}

.hero-feature-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Hero Visual */
.hero-visual {
  position: relative;
  padding: 40px 24px;
  overflow: visible;
  z-index: 1;
}

/* iOS-style Vertical 3D Carousel — 3D perspective, semicircular arc */
.ios-carousel {
  position: relative;
  width: 100%;
  perspective: 1000px;
  perspective-origin: 30% 50%;
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-x;
  overflow: visible;
  z-index: 1;
}

.ios-carousel-viewport {
  position: relative;
  width: 100%;
  height: 450px;
  overflow: hidden;
}

.ios-carousel-track {
  position: relative;
  width: 100%;
  height: 100%;
}

/* iOS Card — all positioned at center, then 3D-transformed */
.ios-card {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 380px;
  height: 285px;
  margin-left: -190px;
  margin-top: -142px;
  border-radius: 24px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.6s ease;
}

.ios-card.active {
  opacity: 1;
}

.ios-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 24px;
  pointer-events: none;
}

/* Responsive */
@media (max-width: 768px) {
  .ios-carousel-viewport {
    height: 500px;
  }
  .ios-card {
    width: 240px;
    height: 320px;
    margin-left: -120px;
    margin-top: -160px;
  }
}

/* Old hero-carousel (unused) */
.hero-carousel-dots { display: none; }
.hero-carousel-track { display: none; }

/* ===================
   Section Styles
   ======================= */
.section {
  padding: 40px 0;
}

.section-sm {
  padding: 60px 0;
}

.section-lg {
  padding: 140px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 13px;
}

.section-kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.section-title {
  margin-bottom: 16px;
}

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

/* ===================
   Cards
   ======================= */
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--text-tertiary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-image-wrapper {
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #e0e0e0 0%, #f5f5f5 100%);
  aspect-ratio: 16/10;
}

.card-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

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

.card-soft {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.card-elevated {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ===================
   Service Cards
   ======================= */
.service-card {
  padding: 40px 32px;
  text-align: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
}

.service-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  margin-bottom: 24px;
  border-radius: var(--radius-lg);
  background: var(--accent-light);
  color: var(--accent);
  font-size: 28px;
}

.service-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.pill-list li {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
}

/* ===================
   Stats Section
   ======================= */
.stats-section {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: 64px;
  margin: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  text-align: center;
}

.stat-item {
  padding: 24px;
}

.stat-number {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .stats-section {
    padding: 40px 24px;
  }
  .stat-number {
    font-size: 2.5rem;
  }

  .hero-carousel {
    min-height: 260px;
    max-height: 320px;
  }
  .hero-slide img {
    min-height: 260px;
    max-height: 320px;
  }
}

/* ===================
   FAQ Accordion
   ======================= */
.faq-shell {
  padding: 0;
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.accordion-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion-header {
  margin: 0;
}

.accordion-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.accordion-button:hover {
  background: var(--bg-hover);
}

.accordion-button::after {
  content: '+';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  font-size: 20px;
  font-weight: 400;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast);
}

.accordion-button:not(.collapsed)::after {
  content: '-';
  transform: rotate(0);
}

.accordion-collapse {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.accordion-collapse.show {
  max-height: 500px;
}

.accordion-body {
  padding: 0 24px 24px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================
   Contact Section
   ======================= */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  align-items: start;
}

.contact-info-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: 40px;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.contact-info-item:last-child {
  border-bottom: none;
}

.contact-info-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-light);
  color: var(--accent);
  flex-shrink: 0;
}

.contact-info-content h4 {
  font-size: 16px;
  margin-bottom: 4px;
}

.contact-info-content p {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
}

.contact-form-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 48px;
}

.contact-form-card h3 {
  margin-bottom: 32px;
}

@media (max-width: 1024px) {
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

/* ===================
   Forms
   ======================= */
.form-group {
  margin-bottom: 20px;
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  font-size: 15px;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-control::placeholder {
  color: var(--text-tertiary);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ===================
   Footer
   ======================= */
.footer-area {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  padding-bottom: 64px;
}

.footer-brand {
  max-width: 320px;
}

.footer-brand .footer-logo {
  display: block;
  margin-bottom: 20px;
}

.footer-brand .footer-logo img {
  height: 36px;
  width: auto;
}

.footer-brand p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #f0f0f0;
  color: #666;
  transition: all 0.2s ease;
  overflow: hidden;
}

.footer-social a:hover {
  background: #1a1a1a;
  color: #fff;
  transform: translateY(-2px);
}

.footer-social img {
  width: 32px !important;
  height: 32px !important;
  object-fit: contain;
  display: block;
}

.footer-column h4 {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 15px;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-newsletter p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.footer-newsletter .subscribe-form {
  display: flex;
  gap: 12px;
}

.footer-newsletter .form-control {
  flex: 1;
}

.footer-newsletter .theme-btn {
  flex-shrink: 0;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  border-top: 1px solid var(--border-subtle);
}

.footer-copyright {
  font-size: 14px;
  color: var(--text-tertiary);
}

.footer-menu {
  display: flex;
  gap: 24px;
}

.footer-menu a {
  font-size: 14px;
  color: var(--text-tertiary);
}

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

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-brand {
    grid-column: 1;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* ===================
   Page Hero
   ======================= */
.page-hero {
  padding: 160px 0 80px;
  text-align: center;
  background: var(--bg-primary);
}

.page-hero .page-kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.page-hero h1 {
  max-width: 800px;
  margin: 0 auto 16px;
}

.page-hero p {
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.125rem;
}

/* ===================
   Utility Classes
   ======================= */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 48px; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 48px; }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: 8px; }
.pt-2 { padding-top: 16px; }
.pt-3 { padding-top: 24px; }
.pt-4 { padding-top: 32px; }
.pt-5 { padding-top: 48px; }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: 8px; }
.pb-2 { padding-bottom: 16px; }
.pb-3 { padding-bottom: 24px; }
.pb-4 { padding-bottom: 32px; }
.pb-5 { padding-bottom: 48px; }

/* ===================
   Alert / Messages
   ======================= */
.alert {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-size: 15px;
  margin-bottom: 16px;
}

.alert-success {
  background: var(--accent-light);
  color: var(--accent);
  border: 1px solid rgba(16, 163, 127, 0.2);
}

.alert-danger {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ===================
   Animations
   ======================= */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease forwards;
}

/* ===================
   Scroll to Top
   ======================= */
#scroll-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--text-primary);
  color: var(--text-inverse);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-fast);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
}

#scroll-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

#scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

/* ===================
   Mobile Menu
   ======================= */
.menu-close {
  display: none;
}

@media (max-width: 991px) {
  .menu-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    font-size: 24px;
    color: var(--ink-700);
    cursor: pointer;
  }

  .refresh-nav {
    flex-wrap: wrap;
    gap: 12px;
  }

  .refresh-nav .navbar-collapse {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-1);
    padding: 80px 24px 24px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    z-index: 999;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
  }

  .refresh-nav .navbar-collapse.show {
    transform: translateX(0);
  }

  .refresh-nav .navbar-nav {
    flex-direction: column;
    align-items: stretch;
  }

  .refresh-nav .nav-item {
    margin: 0;
  }

  .refresh-nav .nav-link {
    padding: 16px;
    border-radius: var(--radius-md);
    font-size: 18px;
  }

  .theme-btn.nav-cta {
    margin-left: 0;
    margin-top: 16px;
    width: 100%;
    justify-content: center;
  }
}

/* ===================
   Detail Layout
   ======================= */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 32px;
  align-items: start;
}

.detail-content {
  padding: 32px;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

@media (max-width: 991px) {
  .detail-layout {
    grid-template-columns: 1fr;
  }
}

/* ===================
   Consult Form (Contact Page)
   ======================= */
.consult-layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 48px;
  align-items: start;
}

/* Info Side */
.consult-info {
  position: sticky;
  top: 100px;
}

.consult-info-header {
  margin-bottom: 32px;
}

.consult-info-header h2 {
  font-size: 1.75rem;
  margin-bottom: 8px;
}

.consult-info-header p {
  color: var(--text-secondary);
  font-size: 15px;
}

.consult-contact-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.consult-contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.consult-contact-item:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

.consult-contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: var(--radius-md);
  font-size: 18px;
  flex-shrink: 0;
}

.consult-contact-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.consult-contact-label {
  font-size: 12px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.consult-contact-value {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}

.consult-wechat-section {
  text-align: center;
  padding: 24px;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
}

.consult-wechat-hint {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.consult-wechat-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #07c160 0%, #06ad56 100%);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 12px rgba(6, 173, 86, 0.3);
}

.consult-wechat-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(6, 173, 86, 0.4);
  color: #fff;
}

.consult-wechat-btn i {
  font-size: 18px;
}

/* Form Card */
.consult-form-wrapper {
  min-width: 0;
}

.consult-form-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
}

.consult-form-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.consult-form-header h3 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.consult-form-header p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Alert */
.consult-alert {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  margin-bottom: 24px;
}

.consult-alert-success {
  background: rgba(34, 197, 94, 0.1);
  color: #16a34a;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.consult-alert-error {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.consult-alert-warning {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
  border: 1px solid rgba(245, 158, 11, 0.2);
}

/* Form Grid */
.consult-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

/* Form Fields */
.consult-field {
  margin-bottom: 0;
}

.consult-field-full {
  grid-column: 1 / -1;
}

.consult-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.consult-label i {
  color: var(--accent);
  font-size: 14px;
}

.consult-label em {
  color: #dc2626;
  font-style: normal;
}

.consult-input {
  width: 100%;
  padding: 14px 16px;
  font-size: 15px;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.consult-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.consult-input::placeholder {
  color: var(--text-tertiary);
}

.consult-input.error {
  border-color: #dc2626;
  background: rgba(220, 38, 38, 0.03);
}

.consult-input.error:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.consult-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.consult-textarea {
  resize: vertical;
  min-height: 120px;
}

.consult-error {
  display: block;
  font-size: 12px;
  color: #dc2626;
  margin-top: 6px;
  min-height: 16px;
}

.consult-field.error .consult-error {
  color: #dc2626;
}

/* Submit */
.consult-form-footer {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.consult-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 200px;
  padding: 16px 40px;
  font-size: 16px;
  font-weight: 600;
  color: #0a0a0a;
  background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.consult-submit:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.consult-submit:active:not(:disabled) {
  transform: translateY(0);
}

.consult-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.consult-submit .consult-submit-loading {
  display: none;
}

.consult-submit.loading .consult-submit-text {
  display: none;
}

.consult-submit.loading .consult-submit-loading {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.consult-submit-hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 12px;
}

/* Responsive */
@media (max-width: 1200px) {
  .consult-layout {
    grid-template-columns: 340px 1fr;
    gap: 32px;
  }
}

@media (max-width: 1024px) {
  .consult-layout {
    grid-template-columns: 1fr;
  }

  .consult-info {
    position: static;
  }

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

@media (max-width: 640px) {
  .consult-form-card {
    padding: 24px 20px;
  }

  .consult-contact-cards {
    gap: 8px;
  }

  .consult-contact-item {
    padding: 12px 16px;
  }
}