/* ========================================
   全局变量
   ======================================== */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #60A5FA;
  --accent: #F97316;
  --accent-light: #FB923C;
  --bg-white: #FFFFFF;
  --bg-gray: #F8FAFC;
  --bg-gray-dark: #F1F5F9;
  --bg-dark: #0F172A;
  --text-primary: #1E293B;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --border-light: rgba(255, 255, 255, 0.1);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(37, 99, 235, 0.15);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 72px;
}

/* ========================================
   重置样式
   ======================================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}


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

input, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ========================================
   背景装饰
   ======================================== */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 10%, rgba(249, 115, 22, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* ========================================
   容器与布局
   ======================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
  border: 1px solid rgba(37, 99, 235, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.section-title {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 20px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ========================================
   导航栏
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  z-index: 1000;
  transition: all var(--transition);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.logo-icon {
  width: 48px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 0.875rem;
  letter-spacing: -0.05em;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
  transition: all var(--transition);
}

.logo:hover .logo-icon {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
}

/* 桌面版导航链接 - 移动端隐藏 */
.nav-links-desktop {
  display: flex;
  align-items: center;
  gap: 40px;
}

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

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
  padding: 8px 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 2px;
  transition: width var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.mobile-menu-btn:hover {
  background: var(--bg-gray);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ========================================
   按钮
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

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

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

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

.btn-ghost:hover {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.05);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-lg {
  padding: 18px 36px;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
}

.btn-icon {
  width: 20px;
  height: 20px;
}

.btn-white {
  background: white;
  color: var(--primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.btn-outline-white {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

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

/* ========================================
   Hero 区域
   ======================================== */
.hero {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 100% 80% at 0% 0%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 80% 60% at 100% 20%, rgba(249, 115, 22, 0.05) 0%, transparent 50%);
  z-index: -1;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-content {
  max-width: 580px;
}

.hero-title {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: 28px;
  letter-spacing: -0.03em;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 44px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  gap: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Hero 右侧 - 聊天演示 */
.hero-visual {
  position: relative;
}

.hero-visual::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120%;
  height: 120%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
  z-index: -1;
}

.chat-demo {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  box-shadow:
    0 25px 50px -12px rgba(0, 0, 0, 0.15),
    0 0 0 1px rgba(255, 255, 255, 0.5) inset;
  overflow: hidden;
  position: relative;
}

.chat-demo::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px;
  background: linear-gradient(180deg, rgba(248, 250, 252, 1) 0%, rgba(241, 245, 249, 1) 100%);
  border-bottom: 1px solid var(--border);
}

.chat-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

.chat-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.chat-avatar svg {
  width: 28px;
  height: 28px;
  color: white;
}

.chat-info {
  display: flex;
  flex-direction: column;
}

.chat-name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.chat-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: #22C55E;
}

.chat-status::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #22C55E;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

.chat-messages {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  background: linear-gradient(180deg, #FAFBFC 0%, #F8FAFC 100%);
  min-height: 320px;
}

.message {
  display: flex;
  flex-direction: column;
  max-width: 85%;
  animation: fadeInUp 0.4s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message-received {
  align-self: flex-start;
}

.message-sent {
  align-self: flex-end;
  align-items: flex-end;
}

.message-bubble {
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 6px;
  position: relative;
}

.message-received .message-bubble.original {
  background: white;
  border: 1px solid var(--border);
  border-bottom-left-radius: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.message-received .message-bubble.translated {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.06) 0%, rgba(37, 99, 235, 0.02) 100%);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  border-bottom-left-radius: 6px;
  border: 1px solid rgba(37, 99, 235, 0.1);
  padding-left: 18px;
  position: relative;
}

.message-received .message-bubble.translated::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--primary);
  border-radius: 2px;
  opacity: 0.5;
}

.message-sent .message-bubble.original {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border-bottom-right-radius: 6px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.message-sent .message-bubble.translated {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.06) 0%, rgba(37, 99, 235, 0.02) 100%);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  border-bottom-left-radius: 6px;
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.message-sent .message-bubble.translated::before {
  content: '';
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: rgba(37, 99, 235, 0.3);
  border-radius: 50%;
}

/* ========================================
   功能卡片
   ======================================== */
.features-section {
  background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-gray) 100%);
}

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

.feature-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
  border: 1px solid rgba(37, 99, 235, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: all var(--transition);
}

.feature-icon svg,
.feature-icon img {
  width: 30px;
  height: 30px;
  color: var(--primary);
  transition: color var(--transition);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-color: transparent;
  transform: scale(1.05);
}

.feature-card:hover .feature-icon svg,
.feature-card:hover .feature-icon img {
  color: white;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-desc {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.9375rem;
}

/* ========================================
   平台支持
   ======================================== */
.platforms-section {
  background: linear-gradient(180deg, var(--bg-gray) 0%, var(--bg-white) 100%);
  position: relative;
  overflow: hidden;
}

.platforms-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 50% 50% at 20% 50%, rgba(37, 99, 235, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse 40% 40% at 80% 50%, rgba(249, 115, 22, 0.04) 0%, transparent 50%);
}

.platforms-section .section-title,
.platforms-section .section-subtitle {
  color: var(--text-primary);
}

.platforms-section .section-label {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
  border-color: rgba(37, 99, 235, 0.15);
  color: var(--primary);
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 1;
}

.platform-card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  transition: all var(--transition);
}

.platform-card:hover {
  transform: translateY(-4px);
  background: white;
  border-color: rgba(37, 99, 235, 0.2);
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.1);
}

.platform-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.platform-icon.whatsapp {
  background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
}

.platform-icon.telegram {
  background: linear-gradient(135deg, #26A5E4 0%, #0088CC 100%);
}

.platform-icon.line {
  background: linear-gradient(135deg, #00B900 0%, #00A000 100%);
}

.platform-icon.messenger {
  background: linear-gradient(135deg, #0084FF 0%, #0066CC 100%);
}

.platform-icon.slack,
.platform-icon.instagram {
  background: linear-gradient(135deg, #E1306C 0%, #C13584 100%);
}

.platform-icon.x {
  background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
}

.platform-icon.more,
.platform-icon.facebook {
  background: linear-gradient(135deg, #1877F2 0%, #0D65D9 100%);
}

.platform-icon.tiktok {
  background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
}

.platform-icon img {
  width: 28px;
  height: 28px;
}

.platform-name {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.platform-region {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ========================================
   用户评价
   ======================================== */
.testimonials-section {
  background: linear-gradient(180deg, var(--bg-gray) 0%, var(--bg-white) 100%);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
  transition: all var(--transition);
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 24px;
  right: 28px;
  font-size: 6rem;
  font-family: Georgia, serif;
  color: var(--primary);
  opacity: 0.08;
  line-height: 1;
}

.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.testimonial-rating {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
}

.testimonial-rating svg {
  width: 20px;
  height: 20px;
  color: #FBBF24;
}

.testimonial-text {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-primary);
  margin-bottom: 28px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.testimonial-author img {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--border);
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 700;
  color: var(--text-primary);
}

.author-title {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ========================================
   CTA 区域
   ======================================== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(249, 115, 22, 0.2) 0%, transparent 50%);
}

.cta-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: white;
}

.cta-subtitle {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: 40px;
  color: rgba(255, 255, 255, 0.9);
}

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

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--bg-dark);
  color: white;
  padding: 80px 0 40px;
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 56px;
  margin-bottom: 56px;
}

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

.footer-brand .logo {
  color: white;
  margin-bottom: 20px;
}

.footer-brand .logo-icon {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0.1) 100%);
}

.footer-desc {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.footer-links h4 {
  font-weight: 600;
  margin-bottom: 24px;
  color: white;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9375rem;
  transition: all var(--transition);
}

.footer-links a:hover {
  color: white;
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.875rem;
}

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

.animate-fade-up {
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 60px;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    max-width: 500px;
    margin: 0 auto;
  }

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

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

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

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }

  .footer-brand {
    grid-column: span 2;
    max-width: 100%;
  }
}

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

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    padding-top: calc(var(--header-height) + 60px);
    padding-bottom: 60px;
  }

  .hero-title {
    font-size: 2.75rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 28px;
  }

  .section {
    padding: 80px 0;
  }

  .section-title {
    font-size: 2rem;
  }

  .section-subtitle {
    font-size: 1.0625rem;
  }

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

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

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

  .footer-brand {
    grid-column: auto;
  }

  .cta-title {
    font-size: 2rem;
  }

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

@media (max-width: 480px) {
  .container {
    padding: 0 20px;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .platforms-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .platform-card {
    padding: 20px 12px;
  }

  .platform-icon {
    width: 44px;
    height: 44px;
  }

  .platforms-section .section-title {
    font-size: 2rem;
  }
}

/* ========================================
   页面 Hero (通用)
   ======================================== */
.page-hero {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: 80px;
  background: linear-gradient(180deg, var(--bg-gray) 0%, var(--bg-white) 100%);
  text-align: center;
  position: relative;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(37, 99, 235, 0.06) 0%, transparent 50%);
}

.page-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 20px;
  position: relative;
}

.page-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.7;
  position: relative;
}

/* ========================================
   功能详情页
   ======================================== */
.feature-detail-grid {
  display: flex;
  flex-direction: column;
  gap: 100px;
}

.feature-detail-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.feature-detail-card.reverse {
  direction: rtl;
}

.feature-detail-card.reverse > * {
  direction: ltr;
}

.feature-badge {
  display: inline-flex;
  padding: 8px 16px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
  border: 1px solid rgba(37, 99, 235, 0.15);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.feature-detail-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.2;
}

.feature-detail-desc {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 28px;
  font-size: 1.0625rem;
}

.feature-detail-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-detail-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  color: var(--text-secondary);
  font-size: 1rem;
}

.feature-detail-list svg {
  width: 22px;
  height: 22px;
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.platform-icons-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.platform-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 20px 12px;
  background: var(--bg-gray);
  border-radius: var(--radius);
  font-size: 0.875rem;
  transition: all var(--transition);
}

.platform-item:hover {
  background: var(--border);
  transform: translateY(-2px);
}

.platform-item .platform-icon {
  width: 40px;
  height: 40px;
  margin: 0;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  /*background: rgba(255, 255, 255, 0.1);*/
}

.platform-item .platform-icon img {
  width: 20px;
  height: 20px;
}

.platform-item .platform-icon.wechat { background: linear-gradient(135deg, #07C160 0%, #06AD56 100%); }
.platform-item .platform-icon.whatsapp { background: linear-gradient(135deg, #25D366 0%, #128C7E 100%); }
.platform-item .platform-icon.telegram { background: linear-gradient(135deg, #26A5E4 0%, #0088CC 100%); }
.platform-item .platform-icon.line { background: linear-gradient(135deg, #00B900 0%, #00A000 100%); }
.platform-item .platform-icon.slack { background: linear-gradient(135deg, #4A154B 0%, #611f69 100%); }
.platform-item .platform-icon.discord { background: linear-gradient(135deg, #5865F2 0%, #4752C4 100%); }

.feature-demo {
  background: linear-gradient(135deg, var(--bg-gray) 0%, var(--bg-white) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.feature-demo::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.03) 0%, transparent 50%);
}

.translation-demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 500px;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.demo-label {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
}

.demo-label svg {
  width: 20px;
  height: 20px;
}

.lang-tag {
  padding: 4px 12px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
}

.demo-message {
  width: 100%;
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  line-height: 1.6;
}

.demo-message.original {
  background: white;
  border: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  text-align: center;
}

.demo-message.translated {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(37, 99, 235, 0.03) 100%);
  border: 1px solid rgba(37, 99, 235, 0.12);
  text-align: center;
  color: var(--primary);
  font-weight: 500;
}

.demo-arrow {
  color: var(--primary);
  opacity: 0.6;
}

.demo-arrow svg {
  width: 24px;
  height: 24px;
}

.platform-showcase {
  background: white;
  border-radius: 20px;
  padding: 28px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

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

.platform-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.platform-count {
  padding: 4px 12px;
  background: var(--primary);
  color: white;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.platform-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 8px;
  border-radius: 12px;
  position: relative;
  transition: all var(--transition);
}

.platform-card:hover {
  transform: translateY(-2px);
}

.platform-card span {
  font-weight: 500;
}

.platform-card.whatsapp {
  background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
}

.platform-card.telegram {
  background: linear-gradient(135deg, #0088cc 0%, #0077B5 100%);
}

.platform-card.line {
  background: linear-gradient(135deg, #00B900 0%, #00A800 100%);
}

.platform-card.messenger {
  background: linear-gradient(135deg, #0084FF 0%, #0066CC 100%);
}

.platform-card.instagram {
  background: linear-gradient(135deg, #E4405F 0%, #C13584 100%);
}

.platform-card.x {
  background: linear-gradient(135deg, #1DA1F2 0%, #0D8EC9 100%);
}

.multi-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  background: white;
  color: var(--text-primary);
  font-size: 0.625rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.translator-showcase {
  background: white;
  border-radius: 20px;
  padding: 28px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
}

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

.translator-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.translator-count {
  padding: 4px 12px;
  background: var(--primary);
  color: white;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

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

.translator-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 8px;
  border-radius: 12px;
  border: 2px solid var(--border);
  background: white;
  transition: all var(--transition);
}

.translator-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.translator-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.875rem;
  color: white;
}

.translator-icon.youdao {
  background: linear-gradient(135deg, #FF4A4A 0%, #CC0000 100%);
}

.translator-icon.google {
  background: linear-gradient(135deg, #4285F4 0%, #1A73E8 100%);
}

.translator-icon.deepl {
  background: linear-gradient(135deg, #0F2B46 0%, #1A3A5C 100%);
}

.translator-icon.openai {
  background: linear-gradient(135deg, #10A37F 0%, #0D7A61 100%);
}

.translator-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.translator-lang {
  font-size: 0.6875rem;
  color: var(--text-secondary);
}

.translator-hint {
  display: flex;
  justify-content: center;
  margin-top: 16px;
  padding: 8px 16px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--primary);
  font-weight: 600;
}

.ai-demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  padding: 20px 0;
}

.translator-selector {
  background: white;
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 380px;
}

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

.selector-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.selector-hint {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-weight: 600;
}

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

.selector-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  background: var(--bg-gray);
  border-radius: 14px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  overflow: hidden;
}

.selector-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.selector-card.active {
  background: white;
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.15);
}

.selector-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0;
  transition: opacity 0.3s;
}

.selector-card:hover .selector-glow {
  opacity: 1;
}

.selector-card.active .selector-glow {
  opacity: 1;
}

.selector-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: 800;
  font-size: 0.75rem;
  color: white;
}

.selector-icon.youdao {
  background: linear-gradient(135deg, #FF4A4A 0%, #CC0000 100%);
}

.selector-icon.google {
  background: linear-gradient(135deg, #4285F4 0%, #1A73E8 100%);
}

.selector-icon.deepl {
  background: linear-gradient(135deg, #0F2B46 0%, #1A3A5C 100%);
}

.selector-icon.openai {
  background: linear-gradient(135deg, #10A37F 0%, #0D7A61 100%);
}

.selector-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.selector-name {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
}

.selector-desc {
  font-size: 0.6875rem;
  color: var(--text-secondary);
}

.selector-check {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.selector-check svg {
  width: 12px;
  height: 12px;
  color: white;
}

.selector-card.active .selector-check {
  opacity: 1;
  transform: scale(1);
}

.ai-brain {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.ai-brain {
  position: relative;
  width: 200px;
  height: 200px;
}

.ai-ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid var(--primary);
  opacity: 0.2;
}

.ai-ring.ring-1 {
  width: 100%;
  height: 100%;
  animation: pulse-ring 3s ease-in-out infinite;
}

.ai-ring.ring-2 {
  width: 75%;
  height: 75%;
  top: 12.5%;
  left: 12.5%;
  animation: pulse-ring 3s ease-in-out infinite 0.5s;
}

.ai-ring.ring-3 {
  width: 50%;
  height: 50%;
  top: 25%;
  left: 25%;
  animation: pulse-ring 3s ease-in-out infinite 1s;
}

.ai-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.4);
}

.ai-core svg {
  width: 40px;
  height: 40px;
  color: white;
}

@keyframes pulse-ring {
  0%, 100% {
    transform: scale(1);
    opacity: 0.2;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.4;
  }
}

.security-demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  position: relative;
  z-index: 1;
  width: 100%;
}

.security-visual-grid {
  display: flex;
  gap: 12px;
}

.security-visual-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 12px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  transition: all var(--transition);
  min-width: 80px;
}

.security-visual-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.security-visual-card.highlight {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  transform: scale(1.05);
}

.security-visual-card.highlight .visual-label {
  color: white;
}

.security-visual-card.highlight .visual-icon svg {
  color: white;
}

.visual-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
}

.visual-icon svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.visual-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
}

.visual-status {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
}

.visual-status.active {
  background: #22C55E;
}

.visual-status.active.pulse {
  animation: status-pulse 2s ease-in-out infinite;
}

@keyframes status-pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.5);
    opacity: 0.6;
  }
}

.security-shield {
  position: relative;
  width: 120px;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.shield-glow {
  position: absolute;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
  animation: shield-pulse 3s ease-in-out infinite;
}

@keyframes shield-pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.8;
  }
}

.shield-icon {
  position: relative;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.3);
}

.shield-icon svg {
  width: 40px;
  height: 40px;
  color: white;
}

.security-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.security-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px;
  background: var(--bg-gray);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.security-item:hover {
  background: var(--border);
  transform: translateX(4px);
}

.security-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.security-icon svg {
  width: 26px;
  height: 26px;
  color: var(--primary);
}

.security-info h4 {
  font-weight: 600;
  margin-bottom: 4px;
}

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

.features-list-section {
  background: var(--bg-gray);
}

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

.list-feature-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 36px;
  transition: all var(--transition);
}

.list-feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.list-feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.list-feature-icon svg,
.list-feature-icon i {
  width: 26px;
  height: 26px;
  color: var(--primary);
}

.list-feature-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.list-feature-card p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.9375rem;
}

/* ========================================
   核心优势卡片
   ======================================== */
.why-us-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.why-us-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--transition);
}

.why-us-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.why-us-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.why-us-card:hover .why-us-icon {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  transform: scale(1.1);
}

.why-us-icon i {
  width: 36px;
  height: 36px;
  color: var(--primary);
  transition: color var(--transition);
}

.why-us-card:hover .why-us-icon i {
  color: white;
}

.why-us-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.why-us-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

@media (max-width: 768px) {
  .why-us-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .why-us-card {
    padding: 28px 20px;
  }

  .why-us-icon {
    width: 60px;
    height: 60px;
  }

  .why-us-icon i {
    width: 28px;
    height: 28px;
  }
}

@media (max-width: 480px) {
  .why-us-grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   价格标签切换
   ======================================== */
.pricing-tabs-section {
  padding-top: 0;
  padding-bottom: 40px;
}

.pricing-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.pricing-tab {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  background: white;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition);
  cursor: pointer;
}

.pricing-tab i {
  width: 22px;
  height: 22px;
}

.pricing-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.pricing-tab.active {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-color: transparent;
  color: white;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

.pricing-content {
  display: none;
}

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

/* ========================================
   价格方案页
   ======================================== */
.billing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 36px;
}

.toggle-label {
  font-weight: 500;
  color: var(--text-secondary);
}

.toggle-label.active {
  color: var(--text-primary);
}

.toggle-switch {
  position: relative;
  width: 56px;
  height: 30px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-switch label {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--border);
  border-radius: 30px;
  transition: var(--transition);
}

.toggle-switch label::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  left: 4px;
  bottom: 4px;
  background: white;
  border-radius: 50%;
  transition: var(--transition);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.toggle-switch input:checked + label {
  background: var(--primary);
}

.toggle-switch input:checked + label::before {
  transform: translateX(26px);
}

.save-badge {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  color: white;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

.pricing-section {
  padding-top: 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 44px 36px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-xl);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-8px);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  padding: 8px 20px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.pricing-header {
  text-align: center;
  margin-bottom: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--border);
}

.pricing-name {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 28px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.currency {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.amount {
  font-size: 3.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.period {
  font-size: 1rem;
  color: var(--text-secondary);
}

.pricing-note {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 10px;
}

.pricing-features {
  flex: 1;
  margin-bottom: 36px;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

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

.pricing-features svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin-top: 1px;
}

.pricing-features li.included svg {
  color: var(--primary);
}

.pricing-features li.excluded {
  color: var(--text-muted);
}

.pricing-features li.excluded svg {
  color: var(--text-muted);
}

.pricing-footer {
  margin-top: auto;
}

/* 对比表格 */
.comparison-section {
  background: var(--bg-gray);
}

.comparison-table-wrapper {
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.comparison-table th,
.comparison-table td {
  padding: 18px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.comparison-table th {
  background: linear-gradient(180deg, var(--bg-gray) 0%, var(--bg-gray-dark) 100%);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr:hover td {
  background: rgba(37, 99, 235, 0.02);
}

.comparison-table .section-row td {
  background: var(--bg-gray);
  font-weight: 600;
  color: var(--text-primary);
}

.comparison-table svg {
  width: 22px;
  height: 22px;
}

.comparison-table svg.yes {
  color: var(--primary);
}

.comparison-table svg.no {
  color: var(--text-muted);
}

/* ========================================
   下载页面
   ======================================== */
.download-section {
  padding-top: 0;
}

.download-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.download-card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  flex: 1;
  min-width: 280px;
  max-width: 400px;
}

.download-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: opacity var(--transition);
}

.download-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.download-card:hover::before {
  opacity: 1;
}

.download-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: linear-gradient(135deg, var(--bg-gray) 0%, var(--bg-white) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.download-card:hover .download-icon {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-color: transparent;
  transform: scale(1.05);
}

.download-icon svg {
  width: 40px;
  height: 40px;
  color: var(--text-primary);
  transition: all var(--transition);
}

.download-icon img {
  width: 40px;
  height: 40px;
  transition: all var(--transition);
}

.download-card:hover .download-icon svg,
.download-card:hover .download-icon img {
  color: white;
  filter: brightness(0) invert(1);
  transform: scale(1.1);
}

.download-info h3 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.download-info p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 8px;
}

.download-version {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.download-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.download-actions .btn {
  width: 100%;
}

.download-actions .btn-ghost {
  background: var(--bg-gray);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.download-actions .btn-ghost:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.browser-section {
  background: var(--bg-gray);
}

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

.browser-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  transition: all var(--transition);
}

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

.browser-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.browser-icon img {
  width: 40px;
  height: 40px;
}

.browser-icon.chrome {
  background: linear-gradient(135deg, #F8F8F8 0%, #E8E8E8 100%);
}

.browser-icon.firefox {
  background: linear-gradient(135deg, #FFEEE1 0%, #FFE4CC 100%);
}

.browser-icon.edge {
  background: linear-gradient(135deg, #F0F6FF 0%, #D0E4FF 100%);
}

.browser-icon.safari {
  background: linear-gradient(135deg, #F8F8F8 0%, #EFEFEF 100%);
}

.browser-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.browser-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 20px;
}

.requirements-section {
  background: var(--bg-white);
}

.requirements-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.requirements-card {
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  overflow: hidden;
  flex: 1;
  min-width: 280px;
  max-width: 400px;
}

.requirements-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.requirements-card:hover::before {
  opacity: 1;
}

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

.requirements-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: white;
}

.requirements-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.requirements-card ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.requirements-card li {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  padding-left: 16px;
  position: relative;
}

.requirements-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
}

.quickstart-section {
  background: linear-gradient(180deg, var(--bg-gray) 0%, var(--bg-white) 100%);
}

.quickstart-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.quickstart-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  text-align: center;
  width: 220px;
  transition: all var(--transition);
}

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

.step-number {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 auto 20px;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.quickstart-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.quickstart-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.quickstart-arrow svg {
  width: 36px;
  height: 36px;
  color: var(--primary);
  opacity: 0.4;
}

/* ========================================
   联系我们页面样式
   ======================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 480px 480px;
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
  justify-content: center;
}

.contact-card {
  background: #fff;
  border-radius: 20px;
  padding: 48px 40px 40px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 1.5px solid #e8edf5;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.telegram-card::before {
  /*background: linear-gradient(90deg, #0088cc, #00bfff);*/
}

.qq-card::before {
  /*background: linear-gradient(90deg, #12b7f5, #4dc9ff);*/
}

.contact-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.12);
  border-color: rgba(37, 99, 235, 0.2);
}

.contact-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.contact-icon svg {
  width: 32px;
  height: 32px;
  color: white;
}

.contact-icon img {
  width: 32px;
  height: 32px;
  color: white;
  filter: brightness(0) invert(1);
}

.telegram-icon {
  background: linear-gradient(135deg, #0088cc 0%, #00bfff 100%);
  box-shadow: 0 6px 20px rgba(0, 136, 204, 0.3);
}

.qq-icon {
  background: linear-gradient(135deg, #12b7f5 0%, #4dc9ff 100%);
  box-shadow: 0 6px 20px rgba(18, 183, 245, 0.3);
}

.contact-card h3 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: #1a202c;
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 20px;
  padding: 14px 20px;
  background: #f7f9fc;
  border-radius: 12px;
  width: 100%;
}

.contact-detail .label {
  font-size: 0.8125rem;
  color: #6b7280;
}

.contact-detail .value {
  font-size: 1.125rem;
  font-weight: 700;
  color: #1a202c;
}

.contact-card .btn {
  margin-top: auto;
}

.qrcode-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px;
  background: #f7f9fc;
  border-radius: 16px;
  margin-bottom: 20px;
  border: 1px solid #e8edf5;
  width: 100%;
}

.qrcode-placeholder .qrcode {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  object-fit: cover;
}

.qrcode-placeholder span {
  font-size: 0.875rem;
  color: #6b7280;
  font-weight: 500;
  margin-bottom: 32px;
}

.contact-options {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.contact-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border-radius: var(--radius);
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.contact-option:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

.contact-option svg {
  width: 22px;
  height: 22px;
}

/* ========================================
   联系我们页面样式
   ======================================== */
/* 商务合作区域 */
.business-section {
  padding-top: 0;
}

.business-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-xl);
  padding: 60px;
  max-width: 1200px;
  margin: 0 auto;
}

.business-content {
  text-align: center;
  color: white;
}

.business-content h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: white;
}

.business-content p {
  font-size: 1.125rem;
  margin-bottom: 20px;
  opacity: 0.9;
}

.business-email {
  display: inline-block;
  font-size: 1.25rem;
  font-weight: 600;
  color: white;
  padding: 12px 32px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.business-email:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* 响应式 */
@media (max-width: 992px) {
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .contact-card {
    padding: 32px 24px;
  }

  .business-card {
    padding: 40px 24px;
  }

  .business-content h2 {
    font-size: 1.5rem;
  }

  .business-email {
    font-size: 1rem;
    padding: 10px 24px;
  }
}

/* ========================================
   隐私保护可视化样式
   ======================================== */
.privacy-main-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 320px;
  height: 220px;
}

/* 设备框架 */
.device-frame {
  position: relative;
  width: 200px;
  height: 160px;
  background: linear-gradient(180deg, #1E293B 0%, #0F172A 100%);
  border-radius: 16px;
  padding: 12px;
  box-shadow:
    0 20px 40px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  z-index: 2;
}

.device-header {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
}

.device-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.device-dot:nth-child(1) { background: #FF5F57; }
.device-dot:nth-child(2) { background: #FFBD2E; }
.device-dot:nth-child(3) { background: #28CA41; }

.device-screen {
  background: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
  border-radius: 8px;
  height: 120px;
  padding: 12px;
  position: relative;
  overflow: hidden;
}

/* 聊天气泡 */
.chat-bubble {
  position: relative;
  padding: 8px 12px;
  border-radius: 12px;
  font-size: 0.6875rem;
  max-width: 75%;
  animation: bubble-float 3s ease-in-out infinite;
}

.chat-bubble.left {
  background: linear-gradient(135deg, #374151 0%, #1f2937 100%);
  color: white;
  border-bottom-left-radius: 4px;
  float: left;
  clear: both;
}

.chat-bubble.right {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border-bottom-right-radius: 4px;
  float: right;
  clear: both;
  margin-top: 8px;
}

.chat-bubble span {
  display: block;
  line-height: 1.4;
}

/* 数据流动线 */
.data-flow {
  position: absolute;
  bottom: 15px;
  left: 50%;
  transform: translateX(-50%);
}

.flow-line {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg,
    rgba(37, 99, 235, 0) 0%,
    rgba(37, 99, 235, 0.3) 50%,
    rgba(37, 99, 235, 0) 100%
  );
  border-radius: 1px;
  position: relative;
}

.flow-dot {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  animation: flow-move 2s ease-in-out infinite;
}

@keyframes bubble-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

@keyframes flow-move {
  0% { left: 0; opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { left: 34px; opacity: 0; }
}

/* 盾牌保护层 */
.privacy-shield {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 160px;
  height: 160px;
  z-index: 1;
}

.shield-ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid rgba(37, 99, 235, 0.2);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.shield-ring.ring-1 {
  width: 100%;
  height: 100%;
  animation: shield-expand 3s ease-in-out infinite;
}

.shield-ring.ring-2 {
  width: 70%;
  height: 70%;
  border-color: rgba(37, 99, 235, 0.3);
  animation: shield-expand 3s ease-in-out infinite 0.5s;
}

.shield-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 8px 32px rgba(37, 99, 235, 0.4),
    0 0 60px rgba(37, 99, 235, 0.2);
}

.shield-core svg {
  width: 36px;
  height: 36px;
  color: white;
}

@keyframes shield-expand {
  0%, 100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.5;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.1);
    opacity: 0.8;
  }
}

/* 底部特性标签 */
.privacy-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 24px;
}

.privacy-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: white;
  border-radius: 50px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: all var(--transition);
  border: 1px solid var(--border);
}

.privacy-tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.privacy-tag.local {
  border-color: rgba(34, 197, 94, 0.3);
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.05) 0%, white 100%);
}

.privacy-tag.local .tag-icon {
  background: linear-gradient(135deg, #22C55E 0%, #16A34A 100%);
}

.privacy-tag.lock {
  border-color: rgba(37, 99, 235, 0.3);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, white 100%);
}

.privacy-tag.lock .tag-icon {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.privacy-tag.privacy {
  border-color: rgba(168, 85, 247, 0.3);
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.05) 0%, white 100%);
}

.privacy-tag.privacy .tag-icon {
  background: linear-gradient(135deg, #A855F7 0%, #9333EA 100%);
}

.tag-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tag-icon svg {
  width: 14px;
  height: 14px;
  color: white;
}

.privacy-tag span {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ========================================
   移动端菜单 - 侧边滑出式
   ======================================== */
@media (max-width: 768px) {
  /* 桌面版导航操作按钮在移动端隐藏 */
  .nav-actions-desktop {
    display: none;
  }

  /* 汉堡菜单按钮 */
  .mobile-menu-btn {
    position: relative;
    z-index: 1001;
  }

  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
  }

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

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

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

  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

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

  .features-list-grid {
    grid-template-columns: 1fr;
  }

  .contact-card {
    padding: 40px 24px;
  }

  .contact-options {
    flex-direction: column;
  }

  .feature-detail-grid {
    gap: 60px;
  }

  .feature-detail-card {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-detail-card.reverse {
    direction: ltr;
  }

  .feature-detail-title {
    font-size: 2rem;
  }

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

/* ========================================
   法律页面样式
   ======================================== */
.legal-section {
  padding-top: 40px;
}

.legal-content {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 60px;
  max-width: 1200px;
  margin: 0 auto;
}

.legal-toc {
  position: sticky;
  top: 100px;
  height: fit-content;
  padding: 24px;
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.legal-toc h2 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.legal-toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.legal-toc li {
  margin-bottom: 8px;
}

.legal-toc a {
  display: block;
  padding: 8px 12px;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.legal-toc a:hover {
  color: var(--primary);
  background: var(--bg-gray);
}

.legal-text {
  background: white;
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow);
}

.legal-text h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 48px;
  margin-bottom: 20px;
  color: var(--text-primary);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}

.legal-text h2:first-child {
  margin-top: 0;
}

.legal-text h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.legal-text p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.legal-text ul,
.legal-text ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.legal-text li {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}

.legal-text a {
  color: var(--primary);
  text-decoration: none;
}

.legal-text a:hover {
  text-decoration: underline;
}

.legal-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.legal-text table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9375rem;
}

.legal-text th,
.legal-text td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--border);
}

.legal-text th {
  background: var(--bg-gray);
  font-weight: 600;
  color: var(--text-primary);
}

.legal-text td {
  color: var(--text-secondary);
}

.cookie-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.875rem;
}

.cookie-table th,
.cookie-table td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--border);
}

.cookie-table th {
  background: var(--bg-gray);
  font-weight: 600;
  color: var(--text-primary);
}

.cookie-table td {
  color: var(--text-secondary);
}

/* 响应式 */
@media (max-width: 992px) {
  .legal-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .legal-toc {
    position: static;
  }

  .legal-toc ul {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .legal-toc li {
    margin-bottom: 0;
  }

  .legal-toc a {
    padding: 6px 12px;
    font-size: 0.875rem;
  }
}

@media (max-width: 768px) {
  .legal-text {
    padding: 24px;
  }

  .legal-text h2 {
    font-size: 1.25rem;
  }

  .legal-text h3 {
    font-size: 1rem;
  }

  .cookie-table {
    font-size: 0.8125rem;
  }

  .cookie-table th,
  .cookie-table td {
    padding: 8px 12px;
  }
}

/* ========================================
   Language Switcher
   ======================================== */
.lang-switcher {
  position: relative;
  display: none;
}

@media (min-width: 1024px) {
  .lang-switcher {
    display: block;
    margin-right: 12px;
  }
}

.lang-switcher-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.lang-switcher-btn:hover {
  color: var(--text-primary);
  border-color: var(--primary);
}

.lang-current-flag {
  font-size: 1rem;
  line-height: 1;
}

.lang-current-name {
  font-weight: 500;
}

.lang-chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--transition);
}

.lang-switcher-btn[aria-expanded="true"] .lang-chevron {
  transform: rotate(180deg);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  list-style: none;
  margin: 0;
  padding: 6px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition);
  z-index: 1000;
}

.lang-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  background: #fff;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  background: transparent;
  border: none;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
}

.lang-option:hover {
  color: var(--text-primary);
}

.lang-option.active {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.08);
}

.lang-opt-flag {
  font-size: 1.1rem;
  line-height: 1;
}

.lang-opt-name {
  flex: 1;
  font-weight: 500;
}

.lang-check {
  width: 16px;
  height: 16px;
  color: var(--primary);
  flex-shrink: 0;
}

/* Mobile language switcher */
.lang-switcher-mobile {
  display: block;
}

@media (min-width: 1024px) {
  .lang-switcher-mobile {
    display: none;
  }
}

.mobile-lang-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0 16px;
  margin-bottom: 8px;
}

.mobile-lang-section {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.mobile-lang-options {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 16px;
}

.mobile-lang-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
}

.mobile-lang-btn:hover {
  color: var(--text-primary);
}

.mobile-lang-btn.active {
  background: rgba(37, 99, 235, 0.08);
  border-color: rgba(37, 99, 235, 0.2);
  color: var(--primary);
  font-weight: 600;
}

.mobile-lang-btn span:first-child {
  font-size: 1.2rem;
}

/* ========================================
   移动端侧边滑出菜单
   ======================================== */
.mobile-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  max-width: 80vw;
  height: 100vh;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  padding: 0;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1001;
  box-shadow: -4px 0 30px rgba(0, 0, 0, 0.15);
  overflow: hidden;
}

.mobile-sidebar.active {
  transform: translateX(0);
}

.mobile-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(248, 250, 252, 1) 0%, rgba(241, 245, 249, 1) 100%);
}

.mobile-sidebar-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.mobile-sidebar-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background var(--transition);
}

.mobile-sidebar-close:hover {
  background: var(--bg-gray);
}

.mobile-sidebar-close svg {
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
}

.mobile-sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  gap: 4px;
  overflow-y: auto;
}

.mobile-sidebar-nav .nav-link {
  font-size: 1rem;
  padding: 14px 16px;
  width: 100%;
  text-align: left;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
  font-weight: 500;
  color: var(--text-primary);
}

.mobile-sidebar-nav .nav-link:hover,
.mobile-sidebar-nav .nav-link.active {
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
}

.mobile-sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(248, 250, 252, 1) 0%, rgba(241, 245, 249, 1) 100%);
}

.mobile-sidebar-footer .btn {
  width: 100%;
  justify-content: center;
}

/* 移动端遮罩层 */
.mobile-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  z-index: 1000;
}

.mobile-overlay.active {
  opacity: 1;
  visibility: visible;
}