/* ========================================
   启迪港云课堂移动端样式
   WisPort CloudLearn Mobile Styles
   ======================================== */

/* CSS Variables - AI Tech Theme */
:root {
  /* Primary Colors */
  --primary: #2467ec;
  --primary-dark: #1a5ad1;
  --primary-light: #4a85f7;
  --secondary: #ffb700;
  
  /* Dark Theme Backgrounds */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a25;
  --bg-card: #161622;
  --bg-hover: #252535;
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  
  /* Accent Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #00d4ff;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(36, 103, 236, 0.4);
  
  /* Spacing */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --header-height: 56px;
  --nav-height: 60px;
  
  /* Transitions */
  --transition-fast: 200ms;
  --transition-normal: 300ms;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body::-webkit-scrollbar {
  display: none;
}

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

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

ul, ol {
  list-style: none;
}

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

/* ========================================
   Layout
   ======================================== */

.page {
  min-height: 100vh;
  padding-top: var(--header-height);
  padding-bottom: calc(var(--nav-height) + var(--safe-bottom) + 16px);
}

.container {
  padding: 0 16px;
}

/* ========================================
   Header
   ======================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-content {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.header-back {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 18px;
}

.header-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
}

.header-logo {
  height: 32px;
}

/* ========================================
   Bottom Navigation
   ======================================== */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--nav-height) + var(--safe-bottom));
  background: rgba(18, 18, 26, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  z-index: 1000;
  padding-bottom: var(--safe-bottom);
}

.bottom-nav-content {
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-around;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px 12px;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.nav-item.active {
  color: var(--primary);
}

.nav-icon {
  font-size: 22px;
  line-height: 1;
}

.nav-label {
  font-size: 10px;
  font-weight: 500;
  line-height: 1;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
  padding: 40px 0;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 26px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.hero-title .highlight {
  color: var(--secondary);
}

.hero-desc {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  gap: 12px;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary:active {
  background: var(--primary-dark);
}

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

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 10px 16px;
  font-size: 13px;
}

/* ========================================
   Cards
   ======================================== */

.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.05);
  overflow: hidden;
}

.card-content {
  padding: 16px;
}

/* Scene Cards */
.scene-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.scene-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 24px;
  color: white;
}

.scene-icon.blue { background: linear-gradient(135deg, #2467ec, #1a5ad1); }
.scene-icon.orange { background: linear-gradient(135deg, #ffb700, #e6a600); }
.scene-icon.green { background: linear-gradient(135deg, #10b981, #059669); }
.scene-icon.red { background: linear-gradient(135deg, #ff2f2f, #e60000); }
.scene-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.scene-icon.cyan { background: linear-gradient(135deg, #06b6d4, #0891b2); }

.scene-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.scene-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Feature Cards Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 16px 8px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 10px;
  font-size: 20px;
  color: var(--primary);
}

.feature-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-primary);
}

/* ========================================
   Section Styles
   ======================================== */

.section {
  padding: 32px 0;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.section-more {
  font-size: 13px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ========================================
   Stats
   ======================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.stat-item {
  text-align: center;
  padding: 20px 12px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-number {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
}

/* ========================================
   List Items
   ======================================== */

.list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

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

.list-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  flex-shrink: 0;
}

.list-content {
  flex: 1;
  min-width: 0;
}

.list-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.list-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.list-arrow {
  font-size: 16px;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ========================================
   Tags
   ======================================== */

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: rgba(36, 103, 236, 0.15);
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
  color: var(--primary);
}

.tag-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.tag-warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
}

/* ========================================
   Tabs
   ======================================== */

.tabs {
  display: flex;
  gap: 8px;
  padding: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab-item {
  flex: 1;
  min-width: 80px;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border-radius: var(--radius-sm);
  text-align: center;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab-item.active {
  background: var(--primary);
  color: var(--text-primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ========================================
   Accordion
   ======================================== */

.accordion-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  overflow: hidden;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  cursor: pointer;
}

.accordion-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

.accordion-icon {
  font-size: 16px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

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

.accordion-item.active .accordion-body {
  max-height: 500px;
}

.accordion-content {
  padding: 0 16px 16px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========================================
   Pricing Cards
   ======================================== */

.pricing-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.pricing-badge {
  position: absolute;
  top: -10px;
  right: 16px;
  padding: 4px 12px;
  background: var(--primary);
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
}

.pricing-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.pricing-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.pricing-price {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 16px;
}

.pricing-price span {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-features {
  margin-bottom: 20px;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  font-size: 13px;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pricing-feature:last-child {
  border-bottom: none;
}

.pricing-feature i {
  color: var(--success);
  font-size: 12px;
}

/* ========================================
   Case Cards
   ======================================== */

.case-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.case-image {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.case-content {
  padding: 16px;
}

.case-tag {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(36, 103, 236, 0.15);
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 10px;
}

.case-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.case-result {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--success);
}

/* ========================================
   Contact Info
   ======================================== */

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  flex-shrink: 0;
}

.contact-content {
  flex: 1;
}

.contact-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-value {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
}

/* ========================================
   Page Header
   ======================================== */

.page-header {
  padding: 24px 0;
  text-align: center;
  position: relative;
}

.page-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.page-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========================================
   Animations
   ======================================== */

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

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

.animate-fadeInUp {
  animation: fadeInUp 0.5s ease-out;
}

/* Stagger animation delays */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }

/* ========================================
   Utilities
   ======================================== */

.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.hidden { display: none !important; }

/* Toast */
.toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 12px 24px;
  border-radius: 24px;
  font-size: 14px;
  z-index: 9999;
}