/* ==================== 基础重置 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #0057FF;
  --primary-dark: #0044CC;
  --primary-light: #E6EEFF;
  --secondary: #64748B;
  --text-dark: #1E293B;
  --text-light: #64748B;
  --text-muted: #94A3B8;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-tertiary: #F1F5F9;
  --border-color: #E2E8F0;
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-dark);
  background: var(--bg-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

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

/* ==================== 按钮样式 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: var(--text-dark);
}

.btn-ghost:hover {
  background: var(--bg-tertiary);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary-light);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 17px;
}

/* ==================== 导航栏 ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
}

.logo-icon {
  font-size: 24px;
}

.nav-menu {
  display: flex;
}

.nav-list {
  display: flex;
  gap: 32px;
}

.nav-link {
  color: var(--text-light);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-actions .btn-ghost {
  display: none;
}

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

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 1px;
  transition: var(--transition);
}

/* ==================== 移动端菜单 ==================== */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100vh;
  background: white;
  z-index: 1100;
  transition: right 0.3s ease;
  display: flex;
  flex-direction: column;
  padding: 80px 24px 24px;
  box-shadow: var(--shadow-xl);
}

.mobile-menu.open {
  right: 0;
}

.mobile-menu-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background: white;
}

.mobile-close {
  font-size: 24px;
  color: var(--text-light);
  padding: 8px;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-link {
  display: block;
  padding: 16px;
  font-size: 16px;
  color: var(--text-dark);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.mobile-link:hover {
  background: var(--bg-tertiary);
  color: var(--primary);
}

.mobile-menu-footer {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.overlay.show {
  opacity: 1;
  visibility: visible;
}

/* ==================== Hero 区 ==================== */
.hero {
  position: relative;
  padding: 140px 0 60px;
  background: linear-gradient(180deg, #FAFBFF 0%, #FFFFFF 100%);
  overflow: hidden;
}

.hero-bg-decor {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  z-index: 0;
}

.decor-circle {
  position: absolute;
  border-radius: 50%;
  opacity: 0.6;
}

.decor-circle-1 {
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, rgba(0, 87, 255, 0.1), rgba(0, 87, 255, 0.05));
  top: -100px;
  right: -100px;
}

.decor-circle-2 {
  width: 300px;
  height: 300px;
  background: linear-gradient(135deg, rgba(100, 116, 139, 0.08), rgba(100, 116, 139, 0.03));
  bottom: -50px;
  left: -50px;
}

.decor-circle-3 {
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(16, 185, 129, 0.03));
  top: 50%;
  left: 20%;
}

.hero-container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-title {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, #6366F1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
}

/* ==================== 翻译器卡片 ==================== */
.translator-card {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.translator-header {
  padding: 0;
  border-bottom: 1px solid var(--border-color);
}

.tab-group {
  display: flex;
  background: var(--bg-secondary);
  padding: 6px;
  gap: 4px;
}

.tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  color: var(--text-light);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.tab:hover {
  color: var(--text-dark);
}

.tab.active {
  background: white;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.tab-icon {
  font-size: 16px;
}

.translator-body {
  padding: 0;
}

.translate-tool {
  padding: 24px;
}

.language-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.lang-select {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  min-width: 120px;
}

.lang-select:hover {
  background: var(--bg-tertiary);
}

.lang-name {
  font-weight: 600;
  color: var(--text-dark);
}

.chevron {
  color: var(--text-muted);
  transition: var(--transition);
}

.lang-select:hover .chevron {
  transform: rotate(180deg);
}

.swap-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--text-dark);
  transition: var(--transition);
  flex-shrink: 0;
}

.swap-btn:hover {
  background: var(--primary);
  color: white;
  transform: rotate(180deg);
}

.text-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.text-panel {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.text-panel:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 87, 255, 0.1);
}

.text-input,
.text-output {
  flex: 1;
  padding: 16px;
  border: none;
  background: transparent;
  resize: none;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-dark);
  min-height: 180px;
  outline: none;
  font-family: inherit;
}

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

.text-output {
  white-space: pre-wrap;
  word-wrap: break-word;
}

.panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
}

.char-count {
  font-size: 13px;
  color: var(--text-muted);
}

.detected-lang {
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
}

.panel-actions {
  display: flex;
  gap: 4px;
}

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--text-light);
  transition: var(--transition);
}

.action-btn:hover {
  background: var(--bg-tertiary);
  color: var(--primary);
}

.translate-btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--primary) 0%, #4F46E5 100%);
  color: white;
  border-radius: var(--radius-lg);
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(0, 87, 255, 0.3);
}

.translate-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 87, 255, 0.4);
}

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

.translate-btn.loading {
  opacity: 0.8;
  pointer-events: none;
}

.translate-icon {
  display: flex;
}

.upload-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  background: var(--bg-secondary);
}

.upload-area:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.upload-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.upload-area h3 {
  font-size: 18px;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.upload-area p {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 20px;
}

.lang-selector-row {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 24px;
  font-size: 14px;
  color: var(--text-light);
}

.mini-lang-select span {
  color: var(--primary);
  font-weight: 600;
}

.translator-footer {
  padding: 16px 24px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.trust-badges {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-light);
}

/* ==================== 通用区块 ==================== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 17px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* ==================== 核心功能 ==================== */
.features {
  padding: 100px 0;
  background: var(--bg-secondary);
}

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

.feature-card {
  background: white;
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.icon-blue {
  background: #EFF6FF;
  color: #3B82F6;
}

.icon-purple {
  background: #F5F3FF;
  color: #8B5CF6;
}

.icon-green {
  background: #ECFDF5;
  color: #10B981;
}

.icon-orange {
  background: #FFF7ED;
  color: #F97316;
}

.icon-red {
  background: #FEF2F2;
  color: #EF4444;
}

.icon-teal {
  background: #F0FDFA;
  color: #14B8A6;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ==================== 行业方案 ==================== */
.solutions {
  padding: 100px 0;
}

.solutions-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.sol-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  background: var(--bg-tertiary);
  color: var(--text-light);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
}

.sol-tab:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.sol-tab.active {
  background: var(--primary);
  color: white;
}

.sol-emoji {
  font-size: 18px;
}

.solutions-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.sol-text h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
}

.sol-text > p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 24px;
  line-height: 1.7;
}

.sol-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.sol-list li {
  font-size: 15px;
  color: var(--text-dark);
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--primary);
}

.sol-stats {
  display: flex;
  gap: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.stat {
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
}

.stat span {
  font-size: 13px;
  color: var(--text-light);
}

.sol-visual {
  display: flex;
  justify-content: center;
}

.visual-card {
  width: 100%;
  max-width: 440px;
  background: #1E293B;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.visual-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px;
  background: #334155;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red { background: #EF4444; }
.dot-yellow { background: #F59E0B; }
.dot-green { background: #10B981; }

.visual-title {
  margin-left: 12px;
  color: #CBD5E1;
  font-size: 13px;
}

.visual-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.code-block {
  background: #0F172A;
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 14px;
  line-height: 1.8;
  color: #E2E8F0;
}

.code-comment {
  color: #64748B;
}

.code-key {
  color: #60A5FA;
}

.code-block.translated {
  color: #34D399;
}

.translate-arrow {
  text-align: center;
  color: #64748B;
  font-size: 20px;
}

/* ==================== 制造领域 ==================== */
.industries {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.industry-card {
  background: white;
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.industry-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.industry-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.industry-card p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.5;
}

/* ==================== 定价 ==================== */
.pricing {
  padding: 100px 0;
}

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

.price-card {
  background: white;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
}

.price-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-lg);
}

.price-card.featured {
  border-color: var(--primary);
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.price-card.featured:hover {
  transform: scale(1.05) translateY(-4px);
}

.price-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  padding: 6px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
}

.price-header h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.price-header p {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 24px;
}

.price-amount {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-color);
}

.price-symbol {
  font-size: 24px;
  color: var(--text-light);
}

.price-value {
  font-size: 48px;
  font-weight: 800;
  color: var(--text-dark);
}

.price-unit {
  font-size: 16px;
  color: var(--text-light);
}

.price-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.price-features li {
  font-size: 14px;
  color: var(--text-dark);
}

.price-features li.disabled {
  color: var(--text-muted);
}

/* ==================== CTA ==================== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, #4F46E5 100%);
}

.cta-card {
  text-align: center;
  color: white;
}

.cta-card h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-card p {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
}

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

.cta-section .btn-primary:hover {
  background: var(--bg-tertiary);
}

.cta-section .btn-ghost {
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.cta-section .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ==================== 页脚 ==================== */
.footer {
  background: var(--text-dark);
  color: #CBD5E1;
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  color: white;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
  color: #94A3B8;
}

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

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #CBD5E1;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--primary);
  color: white;
}

.footer-links h4 {
  color: white;
  font-size: 16px;
  margin-bottom: 20px;
  font-weight: 600;
}

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

.footer-links a {
  font-size: 14px;
  color: #94A3B8;
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #64748B;
}

/* ==================== 语言面板 ==================== */
.lang-panel {
  position: fixed;
  min-width: 280px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-color);
  max-height: 320px;
  overflow: hidden;
  display: none;
  z-index: 2000;
}

.lang-panel.show {
  display: flex;
  flex-direction: column;
}

.lang-panel-header {
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
}

.lang-search {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
}

.lang-search:focus {
  border-color: var(--primary);
}

.lang-list {
  overflow-y: auto;
  padding: 8px;
  max-height: 240px;
}

.lang-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-size: 14px;
}

.lang-item:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.lang-item.selected {
  background: var(--primary);
  color: white;
}

/* ==================== Toast ==================== */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-dark);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  opacity: 0;
  transition: var(--transition);
  z-index: 2000;
  box-shadow: var(--shadow-lg);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-title {
    font-size: 36px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .industries-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .price-card.featured {
    transform: none;
  }

  .price-card.featured:hover {
    transform: translateY(-4px);
  }

  .solutions-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .nav-actions .btn-ghost {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero {
    padding: 120px 0 40px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .translate-tool {
    padding: 16px;
  }

  .text-panels {
    grid-template-columns: 1fr;
  }

  .text-input,
  .text-output {
    min-height: 140px;
  }

  .tab-group {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .tab {
    min-width: max-content;
    padding: 10px 12px;
    font-size: 13px;
  }

  .tab-icon {
    display: none;
  }

  .language-bar {
    flex-wrap: wrap;
    gap: 8px;
  }

  .lang-select {
    min-width: 100px;
    padding: 6px 12px;
  }

  .swap-btn {
    width: 36px;
    height: 36px;
  }

  .features {
    padding: 64px 0;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .feature-card {
    padding: 24px;
  }

  .solutions {
    padding: 64px 0;
  }

  .solutions-tabs {
    gap: 6px;
  }

  .sol-tab {
    padding: 10px 16px;
    font-size: 14px;
  }

  .sol-text h3 {
    font-size: 22px;
  }

  .industries {
    padding: 64px 0;
  }

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

  .industry-card {
    padding: 20px 16px;
  }

  .industry-icon {
    font-size: 32px;
  }

  .pricing {
    padding: 64px 0;
  }

  .section-title {
    font-size: 28px;
  }

  .sol-stats {
    gap: 20px;
    flex-wrap: wrap;
  }

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

  .cta-card h2 {
    font-size: 28px;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-buttons .btn {
    width: 100%;
    max-width: 240px;
  }

  .footer {
    padding: 48px 0 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .trust-badges {
    gap: 16px;
  }

  .trust-item {
    font-size: 12px;
  }

  .decor-circle-1 {
    width: 200px;
    height: 200px;
  }

  .decor-circle-2 {
    width: 150px;
    height: 150px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .nav-container {
    padding: 12px 16px;
  }

  .logo-text {
    font-size: 18px;
  }

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

  .btn-lg {
    padding: 12px 24px;
    font-size: 16px;
  }

  .hero-title {
    font-size: 24px;
  }

  .section-title {
    font-size: 24px;
  }

  .industries-grid {
    grid-template-columns: 1fr;
  }

  .price-card {
    padding: 28px 20px;
  }

  .price-value {
    font-size: 40px;
  }
}

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

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.feature-card,
.industry-card,
.price-card {
  animation: fadeInUp 0.5s ease forwards;
}

/* ==================== 滚动条 ==================== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
  background: #CBD5E1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94A3B8;
}

/* ==================== 选中样式 ==================== */
::selection {
  background: var(--primary-light);
  color: var(--primary-dark);
}

/* ==================== 占位符 ==================== */
.placeholder-text {
  position: absolute;
  top: 16px;
  left: 16px;
  color: var(--text-muted);
  pointer-events: none;
  font-size: 15px;
}

/* ==================== 加载动画 ==================== */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ==================== 代码高亮 ==================== */
.inline-code {
  background: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 14px;
}