/* ========================================
   全局样式
   ======================================== */

:root {
    /* 主色调 */
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #3385ff;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-blue: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    /* 中性色 */
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f0f2f5;
    
    /* 边框 */
    --border-color: #e5e7eb;
    --border-radius: 12px;
    --border-radius-large: 24px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 96px;
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================
   夜间模式变量
   ======================================== */
[data-theme="dark"] {
    /* 主色调（夜间模式保持相同） */
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #3385ff;
    
    /* 渐变色（夜间模式稍微调整） */
    --gradient-primary: linear-gradient(135deg, #7c8ef0 0%, #8a5fb8 100%);
    --gradient-secondary: linear-gradient(135deg, #f5a7fc 0%, #f76b7c 100%);
    --gradient-blue: linear-gradient(135deg, #5fbafe 0%, #10f2fe 100%);
    
    /* 中性色（夜间模式 - 提高对比度和清晰度） */
    --text-primary: #ffffff;
    --text-secondary: #d0d0d0;
    --text-tertiary: #a0a0a0;
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #242424;
    
    /* 边框 */
    --border-color: #404040;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--text-primary);
    background: linear-gradient(180deg, #f8f9fa 0%, #ffffff 50%, #f8f9fa 100%);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 夜间模式背景 */
[data-theme="dark"] body {
    background: #0f0f0f;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(118, 75, 162, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(240, 147, 251, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
    transition: opacity 0.3s ease;
}

/* 夜间模式背景渐变 - 减少透明度，更清晰 */
[data-theme="dark"] body::before {
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(102, 126, 234, 0.08) 0%, transparent 60%),
        radial-gradient(circle at 80% 70%, rgba(118, 75, 162, 0.08) 0%, transparent 60%);
    opacity: 0.6;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

/* 移动端容器优化 */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
}

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

/* ========================================
   导航栏
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.03);
    transition: all var(--transition-base);
    /* 适配刘海屏 / 安全区域 */
    padding-top: constant(safe-area-inset-top, 0);
    padding-top: env(safe-area-inset-top, 0);
}

[data-theme="dark"] .navbar {
    background: #1a1a1a;
    border-bottom: 1px solid rgba(102, 126, 234, 0.3);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
}

[data-theme="dark"] .navbar.scrolled {
    background: #1a1a1a;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7);
}

/* ========================================
   暗色模式 - 通用元素样式
   ======================================== */

/* Hero区域暗色模式 */
[data-theme="dark"] .hero-title,
[data-theme="dark"] .hero-subtitle {
    color: var(--text-primary);
}

[data-theme="dark"] .hero-description {
    color: var(--text-secondary);
}

/* 特性卡片暗色模式 */
[data-theme="dark"] .feature-card {
    background: #1a1a1a;
    border: 2px solid rgba(102, 126, 234, 0.4);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6),
                0 0 0 1px rgba(102, 126, 234, 0.3);
}

[data-theme="dark"] .feature-card:hover {
    box-shadow: 0 25px 50px rgba(102, 126, 234, 0.3),
                0 0 0 2px rgba(102, 126, 234, 0.4),
                0 0 40px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.5);
}

[data-theme="dark"] .feature-title {
    color: var(--text-primary);
}

[data-theme="dark"] .feature-description {
    color: var(--text-secondary);
}

/* 截图区域暗色模式 */
[data-theme="dark"] .screenshots {
    background: var(--bg-secondary);
}

[data-theme="dark"] .screenshot-item {
    background: #1a1a1a;
    border: 1px solid rgba(102, 126, 234, 0.3);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .screenshot-caption {
    color: var(--text-secondary);
    background: #1a1a1a;
}

/* 车辆卡片暗色模式 */
[data-theme="dark"] .vehicle-card {
    background: #1a1a1a;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: 2px solid rgba(102, 126, 234, 0.4);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6),
                0 8px 40px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .vehicle-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 12px 48px rgba(102, 126, 234, 0.25),
                0 24px 80px rgba(0, 0, 0, 0.4),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border-color: rgba(102, 126, 234, 0.5);
}

[data-theme="dark"] .vehicle-icon-wrapper::before {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.15) 100%);
}

[data-theme="dark"] .vehicle-card:hover .vehicle-icon-wrapper::before {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.3) 0%, rgba(118, 75, 162, 0.25) 100%);
}

[data-theme="dark"] .vehicle-title {
    color: var(--text-primary);
}

[data-theme="dark"] .vehicle-description {
    color: var(--text-secondary);
}

[data-theme="dark"] .vehicle-note {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.18) 0%, rgba(118, 75, 162, 0.12) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-primary);
    border: 1.5px solid rgba(102, 126, 234, 0.35);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .vehicle-card:hover .vehicle-note {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.25) 0%, rgba(118, 75, 162, 0.18) 100%);
    border-color: rgba(102, 126, 234, 0.45);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

[data-theme="dark"] .vehicle-info {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.15) 0%, rgba(255, 152, 0, 0.15) 100%);
    border: 1px solid rgba(255, 193, 7, 0.3);
    color: var(--text-secondary);
}

/* 规格卡片暗色模式 */
[data-theme="dark"] .specs {
    background: var(--bg-secondary);
}

[data-theme="dark"] .spec-item {
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.9) 0%, rgba(37, 37, 37, 0.7) 100%);
    border: 2px solid rgba(102, 126, 234, 0.3);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4),
                inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .spec-item:hover {
    box-shadow: 0 12px 30px rgba(79, 172, 254, 0.3);
    border-color: rgba(79, 172, 254, 0.4);
}

[data-theme="dark"] .spec-label {
    color: var(--text-secondary);
}

/* 定价卡片暗色模式 */
[data-theme="dark"] .pricing-card {
    background: #1a1a1a;
    border: 2px solid rgba(102, 126, 234, 0.4);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .pricing-card.featured {
    border-color: rgba(255, 107, 107, 0.4);
    box-shadow: 0 12px 40px rgba(255, 107, 107, 0.3);
}

[data-theme="dark"] .pricing-card.premium {
    border-color: rgba(255, 215, 0, 0.4);
    box-shadow: 0 12px 40px rgba(255, 215, 0, 0.2);
}

[data-theme="dark"] .pricing-title {
    color: #ffffff;
}

[data-theme="dark"] .feature-item {
    color: #d0d0d0;
}

/* 夜间模式 - 价格文字 */
[data-theme="dark"] .price-amount {
    color: #7c8ef0;
}

[data-theme="dark"] .pricing-card.featured .price-amount,
[data-theme="dark"] .pricing-card.featured .price-symbol {
    color: #ff6b6b;
}

[data-theme="dark"] .pricing-card.premium .price-amount,
[data-theme="dark"] .pricing-card.premium .price-symbol {
    color: #FFA500;
}

[data-theme="dark"] .price-symbol {
    color: #7c8ef0;
}

[data-theme="dark"] .price-period {
    color: #d0d0d0;
}

[data-theme="dark"] .price-per-month {
    color: #a0a0a0;
}

/* 夜间模式 - 折扣信息 */
[data-theme="dark"] .discount-info {
    background: rgba(255, 107, 107, 0.2);
    border: 1px solid rgba(255, 107, 107, 0.4);
}

[data-theme="dark"] .discount-tag {
    color: #ffffff;
}

[data-theme="dark"] .discount-price {
    color: #ff6b6b;
}

/* 夜间模式 - VIP卡片特殊处理 */
[data-theme="dark"] .pricing-card.premium {
    background: #1a1a1a;
    border: 2px solid rgba(255, 215, 0, 0.6);
}

[data-theme="dark"] .pricing-card.premium .pricing-title {
    color: #ffffff;
}

[data-theme="dark"] .pricing-card.premium .price-per-month {
    color: #d0d0d0;
}

[data-theme="dark"] .discount-notice {
    background: rgba(255, 107, 107, 0.15);
    border: 1px solid rgba(255, 107, 107, 0.3);
    color: var(--text-primary);
}

/* 返回顶部按钮暗色模式 */
[data-theme="dark"] .back-to-top {
    background: rgba(26, 26, 26, 0.9);
    border: 2px solid rgba(102, 126, 234, 0.3);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    color: var(--text-primary);
}

[data-theme="dark"] .back-to-top:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.3);
}

/* 页脚暗色模式 */
[data-theme="dark"] .footer {
    background: #0f0f0f;
    border-top: 1px solid rgba(102, 126, 234, 0.3);
}

[data-theme="dark"] .footer::before {
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.4), transparent);
}

[data-theme="dark"] .footer-title,
[data-theme="dark"] .footer-heading {
    color: #ffffff;
}

[data-theme="dark"] .footer-description,
[data-theme="dark"] .footer-links a {
    color: #d0d0d0;
}

[data-theme="dark"] .footer-links a:hover {
    color: #ffffff;
}

[data-theme="dark"] .footer-bottom {
    border-top-color: rgba(102, 126, 234, 0.2);
    color: #a0a0a0;
}

[data-theme="dark"] .social-link {
    background: rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.2);
}

[data-theme="dark"] .social-link:hover {
    background: rgba(102, 126, 234, 0.25);
    border-color: rgba(102, 126, 234, 0.4);
}

/* 下载区域暗色模式 */
[data-theme="dark"] .download {
    background: #1a1a1a;
}

/* 按钮暗色模式 */
[data-theme="dark"] .btn-primary {
    background: var(--gradient-primary);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.3);
}

[data-theme="dark"] .btn-primary:hover {
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.4);
}

[data-theme="dark"] .btn-secondary {
    background: #242424;
    border: 2px solid rgba(102, 126, 234, 0.5);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4),
                0 0 0 0 rgba(102, 126, 234, 0.2);
}

[data-theme="dark"] .btn-secondary:hover {
    background: #2a2a2a;
    border-color: rgba(102, 126, 234, 0.7);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4),
                0 0 0 3px rgba(102, 126, 234, 0.2);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo-image {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: cover;
}

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

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links > li {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 17px;
    transition: color var(--transition-fast);
    position: relative;
    white-space: nowrap;
    display: flex;
    align-items: center;
    line-height: 1.5;
    padding: 4px 0;
}

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

/* 下拉菜单 */
.nav-dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    list-style: none;
    padding: 8px 0;
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: 1000;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: 10px 20px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.05);
}

[data-theme="dark"] .dropdown-menu {
    background: #1a1a1a;
    border-color: rgba(102, 126, 234, 0.4);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .dropdown-menu a {
    color: #d0d0d0;
}

[data-theme="dark"] .dropdown-menu a:hover {
    color: #ffffff;
    background: rgba(102, 126, 234, 0.2);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-base);
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base);
}

.theme-toggle:hover .theme-icon {
    transform: rotate(15deg);
}

/* 主题切换按钮暗色模式 */
[data-theme="dark"] .theme-toggle {
    background: rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.3);
    color: var(--text-primary);
}

[data-theme="dark"] .theme-toggle:hover {
    background: rgba(102, 126, 234, 0.3);
    border-color: rgba(102, 126, 234, 0.4);
}

[data-theme="dark"] .mobile-menu-toggle {
    background: rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.3);
}

[data-theme="dark"] .mobile-menu-toggle:hover {
    background: rgba(102, 126, 234, 0.3);
    border-color: rgba(102, 126, 234, 0.4);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 12px;
    cursor: pointer;
    padding: 8px;
    z-index: 1000;
    position: relative;
    transition: all var(--transition-base);
}

.mobile-menu-toggle:hover {
    background: rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
    transform: scale(1.05);
}

.mobile-menu-toggle:active {
    transform: scale(0.95);
}

.mobile-menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
    border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
    background: #667eea;
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
    background: #667eea;
}

/* 导航栏响应式优化 */
@media (max-width: 1200px) {
    .nav-links {
        gap: 20px;
    }
    
    .nav-links a {
        font-size: 16px;
    }
}

@media (max-width: 1024px) {
    .nav-links {
        gap: 18px;
    }
    
    .nav-links a {
        font-size: 16px;
    }
}

@media (max-width: 900px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
}

/* ========================================
   Hero 区域
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    /* 顶部为固定导航栏 + 手机安全区域预留空间 */
    padding-top: calc(120px + constant(safe-area-inset-top, 0));
    padding-top: calc(120px + env(safe-area-inset-top, 0));
    padding-bottom: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    z-index: -1;
    overflow: hidden;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1200px;
    height: 1200px;
    background: radial-gradient(circle, rgba(255, 107, 107, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: pulse-ring 4s ease-in-out infinite;
}

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

.hero-bg::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float-slow 20s ease-in-out infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -10%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(118, 75, 162, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    animation: float-slow 15s ease-in-out infinite reverse;
}

@keyframes float-slow {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(30px, 30px);
    }
}

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

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

.hero-title {
    font-size: 72px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    position: relative;
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-flow 6s ease infinite;
    position: relative;
    display: inline-block;
    filter: drop-shadow(0 4px 20px rgba(102, 126, 234, 0.3));
}

/* V2.0版本徽章 */
.version-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 800;
    padding: 8px 20px;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 50%, #c44569 100%);
    background-size: 200% 200%;
    color: white;
    border-radius: 50px;
    box-shadow: 0 8px 30px rgba(255, 107, 107, 0.4),
                0 0 0 4px rgba(255, 107, 107, 0.1),
                inset 0 2px 4px rgba(255, 255, 255, 0.3);
    animation: gradient-flow 4s ease infinite, pulse-glow 2s ease-in-out infinite;
    position: relative;
    overflow: hidden;
    transform: scale(1);
    transition: all 0.3s ease;
}

.version-badge::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    transform: rotate(45deg);
    animation: shine-badge 3s infinite;
}

@keyframes shine-badge {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 8px 30px rgba(255, 107, 107, 0.4),
                    0 0 0 4px rgba(255, 107, 107, 0.1),
                    inset 0 2px 4px rgba(255, 255, 255, 0.3);
    }
    50% {
        box-shadow: 0 12px 40px rgba(255, 107, 107, 0.6),
                    0 0 0 6px rgba(255, 107, 107, 0.2),
                    inset 0 2px 4px rgba(255, 255, 255, 0.3);
        transform: scale(1.05);
    }
}

.version-badge:hover {
    transform: scale(1.1) rotate(5deg);
    animation: gradient-flow 4s ease infinite, pulse-glow 1s ease-in-out infinite;
}

/* V2.0倒计时徽章 */
.v2-badge {
    display: inline-block;
    font-size: 16px;
    font-weight: 700;
    padding: 6px 16px;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
    color: white;
    border-radius: 20px;
    margin-right: 12px;
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
    animation: pulse 2s ease-in-out infinite;
    vertical-align: middle;
}

/* 版本高亮 */
.version-highlight {
    display: inline-block;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
    position: relative;
    filter: drop-shadow(0 2px 8px rgba(255, 107, 107, 0.3));
}

/* 高亮词 */
.highlight-word {
    display: inline-block;
    position: relative;
    padding: 0 4px;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: 4px;
}

.highlight-word:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

@keyframes gradient-flow {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.hero-subtitle {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}


.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    align-items: flex-start;
}

.hero-cta .btn-download {
    padding: 20px 56px;
    font-size: 20px;
    font-weight: 700;
    min-width: 220px;
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.5),
                0 0 0 0 rgba(102, 126, 234, 0.2);
}

.hero-cta .btn-download:hover {
    transform: translateY(-5px) scale(1.03);
    box-shadow: 0 15px 50px rgba(102, 126, 234, 0.7),
                0 0 0 5px rgba(102, 126, 234, 0.15);
}

.hero-cta-secondary {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.btn-medium {
    padding: 14px 28px;
    font-size: 15px;
    min-width: auto;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

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

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 200% 200%;
    color: white;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4),
                0 0 0 0 rgba(102, 126, 234, 0.2);
    animation: gradient-flow 6s ease infinite;
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.6),
                0 0 0 4px rgba(102, 126, 234, 0.1);
    animation: gradient-flow 3s ease infinite;
}

.btn-primary:hover::after {
    width: 400px;
    height: 400px;
}

.btn-secondary {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.85) 100%);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--text-primary);
    border: 2px solid rgba(102, 126, 234, 0.25);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.1),
                0 0 0 0 rgba(102, 126, 234, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: left 0.5s ease;
}

.btn-secondary:hover {
    border-color: rgba(102, 126, 234, 0.5);
    color: var(--primary-color);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.25),
                0 0 0 3px rgba(102, 126, 234, 0.1);
    background: linear-gradient(135deg, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0.95) 100%);
}

.btn-secondary:hover::before {
    left: 100%;
}

.btn-secondary:active {
    transform: translateY(-1px) scale(0.98);
}

.btn-large {
    padding: 18px 48px;
    font-size: 18px;
    min-width: 180px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Hero 视觉 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.device-mockup {
    position: relative;
    width: 100%;
    max-width: 600px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 200% 200%;
    border-radius: var(--border-radius-large);
    padding: 18px;
    box-shadow: 0 25px 70px rgba(102, 126, 234, 0.5),
                0 0 0 2px rgba(255, 255, 255, 0.2) inset,
                0 0 60px rgba(255, 107, 107, 0.2);
    transition: all var(--transition-slow);
    animation: device-float 6s ease-in-out infinite, gradient-flow 8s ease infinite;
    position: relative;
    overflow: hidden;
}

.device-mockup::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transform: rotate(45deg);
    animation: shine-device 4s infinite;
}

@keyframes shine-device {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

@keyframes device-float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.device-mockup:hover {
    transform: translateY(-25px) scale(1.03);
    box-shadow: 0 35px 90px rgba(102, 126, 234, 0.6),
                0 0 0 3px rgba(255, 255, 255, 0.3) inset,
                0 0 80px rgba(255, 107, 107, 0.3);
    animation: device-float 4s ease-in-out infinite, gradient-flow 4s ease infinite;
}

.device-screen {
    width: 100%;
    background: var(--bg-secondary);
    border-radius: 16px;
    overflow: hidden;
    position: relative;
}

.placeholder-screen {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
}

.placeholder-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-sm);
}

.product-screenshot {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
    object-fit: contain;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border-left: 2px solid var(--text-tertiary);
    border-bottom: 2px solid var(--text-tertiary);
    transform: rotate(-45deg);
}

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

/* ========================================
   特性区域
   ======================================== */

.features {
    padding: var(--spacing-xl) 0;
    background: var(--bg-primary);
}

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

.section-title {
    font-size: 48px;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-flow 8s ease infinite;
    position: relative;
    filter: drop-shadow(0 4px 12px rgba(102, 126, 234, 0.2));
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.85) 100%);
    backdrop-filter: blur(25px) saturate(180%);
    -webkit-backdrop-filter: blur(25px) saturate(180%);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-large);
    border: 2px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.12),
                0 0 0 1px rgba(255, 255, 255, 0.8),
                inset 0 1px 2px rgba(255, 255, 255, 1);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: 0 25px 50px rgba(102, 126, 234, 0.25),
                0 0 0 2px rgba(102, 126, 234, 0.2),
                0 0 40px rgba(255, 107, 107, 0.15);
    border-color: rgba(102, 126, 234, 0.4);
}

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

.feature-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-md);
    display: inline-block;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    filter: drop-shadow(0 6px 16px rgba(102, 126, 234, 0.25));
    transform: scale(1);
}

.feature-card:hover .feature-icon {
    transform: scale(1.2) translateY(-8px) rotate(8deg);
    filter: drop-shadow(0 12px 30px rgba(102, 126, 234, 0.5));
    animation: icon-bounce 0.6s ease;
}

@keyframes icon-bounce {
    0%, 100% {
        transform: scale(1.2) translateY(-8px) rotate(8deg);
    }
    50% {
        transform: scale(1.3) translateY(-12px) rotate(12deg);
    }
}

.feature-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   截图区域
   ======================================== */

.screenshots {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.screenshots-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.screenshot-item {
    position: relative;
    background: var(--bg-primary);
    border-radius: var(--border-radius-large);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 2px solid rgba(255, 255, 255, 0.8);
    transition: all var(--transition-base);
}

.screenshot-item.featured {
    grid-column: span 2;
}

.screenshot-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.screenshot-item:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.25);
    border-color: rgba(102, 126, 234, 0.3);
}

.screenshot-item:hover::after {
    opacity: 1;
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 12px 12px 0 0;
}

.screenshot-caption {
    padding: var(--spacing-md);
    text-align: center;
}

.screenshot-caption h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.screenshot-caption p {
    font-size: 14px;
    color: var(--text-secondary);
}

.screenshot-placeholder {
    aspect-ratio: 16 / 9;
    background: var(--bg-primary);
    border-radius: var(--border-radius-large);
    border: 2px dashed var(--border-color);
    overflow: hidden;
    transition: all var(--transition-base);
}

.screenshot-placeholder:hover {
    border-color: var(--primary-color);
    transform: scale(1.02);
}

.placeholder-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    text-align: center;
}

.placeholder-icon.large {
    font-size: 72px;
    margin-bottom: var(--spacing-sm);
}

.placeholder-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.placeholder-content p {
    color: var(--text-tertiary);
}

/* ========================================
   支持车型
   ======================================== */

.supported-vehicles {
    padding: var(--spacing-xl) 0;
    background: var(--bg-primary);
}

.vehicles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 var(--spacing-sm);
}

.vehicle-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 249, 255, 0.9) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 28px;
    padding: var(--spacing-xl);
    text-align: center;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1),
                0 8px 40px rgba(0, 0, 0, 0.06),
                inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.vehicle-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: left;
}

.vehicle-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.06) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.vehicle-card:hover {
    transform: translateY(-12px) scale(1.02);
    border-color: rgba(102, 126, 234, 0.4);
    box-shadow: 0 12px 48px rgba(102, 126, 234, 0.2),
                0 24px 80px rgba(0, 0, 0, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.vehicle-card:hover::before {
    transform: scaleX(1);
}

.vehicle-card:hover::after {
    opacity: 1;
}

.vehicle-icon-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-lg);
    padding: 20px;
}

.vehicle-icon-wrapper::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: 50%;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 0;
}

.vehicle-card:hover .vehicle-icon-wrapper::before {
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.25) 0%, rgba(118, 75, 162, 0.2) 100%);
}

.vehicle-icon {
    font-size: 72px;
    display: inline-block;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 4px 16px rgba(102, 126, 234, 0.2));
    line-height: 1;
    position: relative;
    z-index: 1;
}

.vehicle-card:hover .vehicle-icon {
    transform: scale(1.15) translateY(-10px) rotate(8deg);
    filter: drop-shadow(0 10px 30px rgba(102, 126, 234, 0.4));
}

.vehicle-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    letter-spacing: -0.5px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.vehicle-description {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    opacity: 0.85;
}

.vehicle-note {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.12) 0%, rgba(118, 75, 162, 0.08) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--primary-color);
    padding: 14px 20px;
    border-radius: 16px;
    font-size: 13.5px;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    border: 1.5px solid rgba(102, 126, 234, 0.25);
    line-height: 1.6;
    max-width: 92%;
    text-align: left;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.1);
}

.vehicle-card:hover .vehicle-note {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.18) 0%, rgba(118, 75, 162, 0.12) 100%);
    border-color: rgba(102, 126, 234, 0.35);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
    transform: translateY(-2px);
}

.vehicle-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, #10b981 0%, #059669 50%, #34d399 100%);
    background-size: 200% 200%;
    color: white;
    padding: 12px 28px;
    border-radius: 16px;
    font-size: 15px;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.35),
                0 0 0 0 rgba(16, 185, 129, 0.2);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: gradient-flow 4s ease infinite;
}

.vehicle-badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
}

.vehicle-badge::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}

.vehicle-card:hover .vehicle-badge {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.45),
                0 0 0 4px rgba(16, 185, 129, 0.15);
    animation: gradient-flow 2s ease infinite;
}

.vehicle-card:hover .vehicle-badge::before {
    left: 100%;
}

.vehicle-card:hover .vehicle-badge::after {
    width: 300px;
    height: 300px;
}

.vehicle-badge svg {
    width: 18px;
    height: 18px;
    stroke-width: 2.5;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

.vehicle-note-section {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
}

.vehicle-info {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1) 0%, rgba(255, 152, 0, 0.1) 100%);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid rgba(255, 193, 7, 0.2);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 15px;
}

.vehicle-info svg {
    color: var(--primary-color);
    flex-shrink: 0;
}

/* 车型反馈表单 */
.vehicle-feedback-section {
    margin-top: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.vehicle-feedback-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.1) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid rgba(102, 126, 234, 0.3);
    border-radius: 16px;
    padding: 14px 24px;
    color: var(--primary-color);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
    text-decoration: none;
}

.vehicle-feedback-toggle:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.25) 0%, rgba(118, 75, 162, 0.18) 100%);
    border-color: rgba(102, 126, 234, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.25);
    color: var(--primary-color);
}

.vehicle-feedback-toggle:active {
    transform: translateY(0);
}

.vehicle-feedback-form {
    margin-top: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 249, 255, 0.9) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 24px;
    padding: var(--spacing-xl);
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.15),
                0 0 0 1px rgba(255, 255, 255, 0.5) inset;
    animation: slideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.feedback-form-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feedback-form-header p {
    font-size: 14px;
    color: var(--text-secondary);
    opacity: 0.8;
}

.feedback-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group label svg {
    width: 16px;
    height: 16px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.form-group .required {
    color: #ef4444;
    font-weight: 700;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 12px;
    font-size: 15px;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-primary);
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

.form-hint {
    font-size: 12px;
    color: var(--text-secondary);
    opacity: 0.7;
    margin-top: -4px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(102, 126, 234, 0.1);
}

.form-actions .btn {
    min-width: 120px;
}

/* 暗色模式 */
[data-theme="dark"] .vehicle-feedback-toggle {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.15) 100%);
    border-color: rgba(102, 126, 234, 0.35);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

[data-theme="dark"] .vehicle-feedback-toggle:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.3) 0%, rgba(118, 75, 162, 0.25) 100%);
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

[data-theme="dark"] .vehicle-feedback-form {
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.95) 0%, rgba(30, 30, 40, 0.9) 100%);
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4),
                0 0 0 1px rgba(102, 126, 234, 0.2) inset;
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea {
    background: rgba(20, 20, 30, 0.8);
    border-color: rgba(102, 126, 234, 0.3);
    color: var(--text-primary);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group textarea:focus {
    background: rgba(20, 20, 30, 0.95);
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
}

[data-theme="dark"] .form-actions {
    border-top-color: rgba(102, 126, 234, 0.2);
}

/* 响应式 */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
    
    .vehicle-feedback-form {
        padding: var(--spacing-lg);
    }
}

/* ========================================
   技术规格
   ======================================== */

.specs {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.spec-item {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
    backdrop-filter: blur(20px);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-large);
    border: 2px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06),
                inset 0 1px 0 rgba(255, 255, 255, 0.9);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.spec-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-blue);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.spec-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(79, 172, 254, 0.2);
    border-color: rgba(79, 172, 254, 0.3);
}

.spec-item:hover::before {
    transform: scaleX(1);
}

.spec-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.spec-value {
    font-size: 32px;
    font-weight: 800;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all var(--transition-base);
}

.spec-item:hover .spec-value {
    transform: scale(1.1);
}

/* ========================================
   定价区域
   ======================================== */

.pricing {
    padding: 80px 0;
    background: #f8f9fb;
    position: relative;
    overflow: hidden;
}

[data-theme="dark"] .pricing {
    background: #0f0f0f;
}


/* 定价网格 */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 48px;
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

/* 当有4个卡片时，使用2x2布局 */
@media (min-width: 769px) and (max-width: 1100px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 700px;
    }
}

@media (min-width: 1101px) {
    .pricing-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.pricing-card {
    background: #ffffff;
    border: 1px solid rgba(102, 126, 234, 0.15);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px 16px 0 0;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    border-color: rgba(102, 126, 234, 0.3);
}

.pricing-card.featured {
    border: 2px solid #667eea;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.15);
}

.pricing-card.featured::before {
    background: linear-gradient(90deg, #ff6b6b 0%, #ee5a6f 100%);
}

.pricing-card.featured:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(102, 126, 234, 0.25);
}

.pricing-card.premium {
    border: 2px solid #FFD700;
    background: linear-gradient(135deg, rgba(255, 248, 220, 0.3) 0%, rgba(255, 255, 255, 1) 100%);
    box-shadow: 0 4px 16px rgba(255, 215, 0, 0.15);
}

.pricing-card.premium::before {
    background: linear-gradient(90deg, #FFD700 0%, #FFA500 100%);
}

.pricing-card.premium:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(255, 215, 0, 0.25);
}

.pricing-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: #667eea;
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.pricing-badge.best {
    background: #ff6b6b;
}

.pricing-badge.premium-badge {
    background: #FFD700;
    color: #333;
}

.pricing-header {
    margin-bottom: 24px;
    padding-top: 24px;
}

.pricing-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-bottom: var(--spacing-sm);
    flex-wrap: nowrap;
}

.price-symbol {
    font-size: 20px;
    font-weight: 600;
    color: #667eea;
}

.price-amount {
    font-size: 48px;
    font-weight: 800;
    color: #667eea;
    line-height: 1;
    white-space: nowrap;
}

.pricing-card.featured .price-amount {
    color: #ff6b6b;
}

.pricing-card.featured .price-symbol {
    color: #ff6b6b;
}

.pricing-card.premium .price-amount {
    color: #FFA500;
}

.pricing-card.premium .price-symbol {
    color: #FFA500;
}

.price-period {
    font-size: 16px;
    font-weight: 500;
    color: #8b95a5;
    white-space: nowrap;
}

.price-per-month {
    font-size: 13px;
    color: #8b95a5;
    font-weight: 400;
    margin-top: 4px;
}

.pricing-features {
    margin: 24px 0;
    text-align: left;
}

.feature-item {
    padding: 10px 0;
    font-size: 14px;
    color: #4a5568;
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-item.highlight {
    color: #667eea;
    font-weight: 600;
}

.pricing-btn {
    width: 100%;
    margin-top: 16px;
    display: inline-block;
    text-align: center;
    text-decoration: none;
    box-sizing: border-box;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 8px;
}

/* 折扣信息 */
.discount-info {
    margin-top: 16px;
    padding: 12px 16px;
    background: rgba(255, 107, 107, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(255, 107, 107, 0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.discount-tag {
    font-size: 11px;
    font-weight: 600;
    color: #fff;
    background: #ff6b6b;
    padding: 4px 12px;
    border-radius: 12px;
    letter-spacing: 0.5px;
}

.discount-price {
    font-size: 18px;
    font-weight: 700;
    color: #ff6b6b;
}

/* 老用户优惠说明 */
.discount-notice {
    margin-top: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(124, 77, 255, 0.05) 0%, rgba(99, 102, 241, 0.05) 100%);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(124, 77, 255, 0.2);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-xl);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: 0 8px 30px rgba(124, 77, 255, 0.1);
}

.notice-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.notice-icon {
    font-size: 32px;
    animation: bounce-rotate 2s ease-in-out infinite;
}

.notice-title {
    font-size: 24px;
    font-weight: 800;
    background: linear-gradient(135deg, #7c4dff 0%, #6366f1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.notice-content {
    text-align: center;
}

.discount-rule {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.rule-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--border-radius);
    border: 2px solid rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
}

.rule-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124, 77, 255, 0.15);
    border-color: rgba(124, 77, 255, 0.4);
}

.rule-item.highlight {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.12) 0%, rgba(238, 90, 111, 0.12) 100%);
    border-color: rgba(255, 107, 107, 0.4);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.2);
}

.rule-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.rule-discount {
    font-size: 18px;
    font-weight: 800;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.rule-item.highlight .rule-discount {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 20px;
    text-shadow: 0 2px 10px rgba(255, 107, 107, 0.3);
}

.notice-tip {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-top: var(--spacing-sm);
    font-style: italic;
}

.notice-tip-deadline {
    color: #ff6b6b;
    font-weight: 600;
    font-style: normal;
    padding: 10px 14px;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.1) 0%, rgba(255, 107, 107, 0.05) 100%);
    border-left: 3px solid #ff6b6b;
    border-radius: 6px;
    margin-top: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.15);
}

.discount-section {
    margin-bottom: var(--spacing-lg);
}

.discount-section:last-of-type {
    margin-bottom: 0;
}

.discount-section-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    text-align: left;
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, rgba(124, 77, 255, 0.08) 0%, rgba(99, 102, 241, 0.08) 100%);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
}

@media (max-width: 768px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    
    .price-amount {
        font-size: 42px;
    }
}

/* ========================================
   下载区域
   ======================================== */

.download {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
}

.download-content {
    text-align: center;
}

/* 试用信息横幅 */
.trial-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 50%, #FF8C00 100%);
    background-size: 200% 200%;
    animation: gradient-flow 5s ease infinite;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-large);
    margin: var(--spacing-lg) auto;
    max-width: 650px;
    box-shadow: 0 12px 50px rgba(255, 165, 0, 0.5),
                0 0 0 2px rgba(255, 255, 255, 0.3),
                inset 0 2px 4px rgba(255, 255, 255, 0.4);
    position: relative;
    overflow: hidden;
    border: 3px solid rgba(255, 255, 255, 0.6);
    transform: translateY(0);
    transition: all 0.3s ease;
}

.trial-banner:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 18px 60px rgba(255, 165, 0, 0.6),
                0 0 0 3px rgba(255, 255, 255, 0.4),
                inset 0 2px 4px rgba(255, 255, 255, 0.4);
}

.trial-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transform: rotate(45deg);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.trial-icon {
    font-size: 56px;
    animation: bounce-rotate 2s ease-in-out infinite;
    filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.2));
}

@keyframes bounce-rotate {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-8px) rotate(-5deg);
    }
    50% {
        transform: translateY(-12px) rotate(0deg);
    }
    75% {
        transform: translateY(-8px) rotate(5deg);
    }
}

.trial-info {
    flex: 1;
    text-align: left;
}

.trial-title {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.trial-description {
    font-size: 16px;
    color: #fff;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.trial-description .highlight {
    font-size: 24px;
    font-weight: 800;
    color: #FF4500;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    padding: 0 4px;
}

.trial-badge {
    background: rgba(255, 255, 255, 0.95);
    color: #FF6B00;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.download-options {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
}

.download-options .btn {
    flex: 0 0 auto;
}

.download-info {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.info-item svg {
    color: var(--primary-color);
}

/* ========================================
   快速配置区域
   ======================================== */
.quick-config-section {
    animation: fadeInUp 0.5s ease;
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    width: 100%;
}

.config-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.config-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.config-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.4);
}

.config-card:hover::before {
    transform: scaleX(1);
}

.config-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.config-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    flex-shrink: 0;
}

.config-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
}

.config-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
    flex: 1;
}

.config-preview {
    width: 100%;
    height: 180px;
    border-radius: var(--border-radius);
    object-fit: cover;
    margin-bottom: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.config-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: auto;
    padding-top: var(--spacing-md);
}

.config-btn {
    flex: 1;
    padding: 10px 16px;
    border-radius: var(--border-radius);
    border: none;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

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

.config-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.config-btn-secondary {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(102, 126, 234, 0.2);
    text-decoration: none;
}

.config-btn-secondary:hover {
    background: rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
    text-decoration: none;
}

.config-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: var(--spacing-sm);
}

.config-tag {
    padding: 4px 10px;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

/* 投稿卡片特殊样式 */
.config-card-submit {
    border: 2px dashed rgba(102, 126, 234, 0.4) !important;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%) !important;
    position: relative;
    overflow: hidden;
}

.config-card-submit::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
    opacity: 0.5;
}

.config-card-submit:hover {
    border-color: rgba(102, 126, 234, 0.6) !important;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%) !important;
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.3) !important;
}

[data-theme="dark"] .config-card-submit {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%) !important;
    border-color: rgba(102, 126, 234, 0.5) !important;
}

[data-theme="dark"] .config-card-submit:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%) !important;
    border-color: rgba(102, 126, 234, 0.7) !important;
}

/* 夜间模式 - 快速配置 */
[data-theme="dark"] .config-card {
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.9) 0%, rgba(26, 26, 26, 0.7) 100%);
    border: 2px solid rgba(102, 126, 234, 0.3);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .config-card:hover {
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.3);
    border-color: rgba(102, 126, 234, 0.5);
}

[data-theme="dark"] .config-title {
    color: var(--text-primary);
}

[data-theme="dark"] .config-description {
    color: var(--text-secondary);
}

[data-theme="dark"] .config-preview {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

[data-theme="dark"] .config-btn-secondary {
    background: rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
}

[data-theme="dark"] .config-tag {
    background: rgba(102, 126, 234, 0.2);
}

[data-theme="dark"] .config-tips {
    background: rgba(102, 126, 234, 0.1);
    border-left-color: var(--primary-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .config-grid {
        grid-template-columns: 1fr;
    }
    
    .download-options {
        flex-direction: column;
    }
    
    .download-options .btn {
        width: 100%;
    }
}

/* ========================================
   关注我们 - 二维码展示
   ======================================== */

.follow-us {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.03) 0%, rgba(0, 242, 254, 0.03) 100%);
    position: relative;
    overflow: hidden;
}

.follow-us::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(102, 126, 234, 0.05) 0%, transparent 70%);
    animation: rotate-gradient 20s linear infinite;
    pointer-events: none;
}

@keyframes rotate-gradient {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.qr-codes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.qr-code-card {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

/* 二维码卡片交错动画延迟 */
.qr-code-card:nth-child(1) {
    transition-delay: 0s;
}

.qr-code-card:nth-child(2) {
    transition-delay: 0.15s;
}

.qr-code-card:nth-child(3) {
    transition-delay: 0.3s;
}

.qr-code-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.qr-code-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border-color: transparent;
}

.qr-code-card:hover::before {
    transform: scaleX(1);
}

.qr-code-header {
    margin-bottom: var(--spacing-md);
}

.social-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-sm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    position: relative;
}

.social-icon::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    opacity: 0;
    filter: blur(12px);
    transition: opacity var(--transition-base);
}

.qr-code-card:hover .social-icon {
    transform: scale(1.1) rotate(5deg);
}

.qr-code-card:hover .social-icon::before {
    opacity: 0.6;
}

.social-icon.wechat {
    background: linear-gradient(135deg, #09bb07 0%, #06a23c 100%);
    color: white;
}

.social-icon.wechat::before {
    background: linear-gradient(135deg, #09bb07 0%, #06a23c 100%);
}

.social-icon.xiaohongshu {
    background: linear-gradient(135deg, #ff2442 0%, #fe2c55 100%);
    color: white;
}

.social-icon.xiaohongshu::before {
    background: linear-gradient(135deg, #ff2442 0%, #fe2c55 100%);
}

.social-icon.douyin {
    background: linear-gradient(135deg, #000000 0%, #333333 100%);
    color: white;
}

.social-icon.douyin::before {
    background: linear-gradient(135deg, #000000 0%, #333333 100%);
}

.qr-code-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.qr-code-image-wrapper {
    position: relative;
    width: 200px;
    height: 200px;
    margin: var(--spacing-md) auto;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    cursor: pointer;
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-code-image-wrapper:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.qr-code-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: all var(--transition-base);
    display: block;
}

.qr-code-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-base);
}

.qr-code-image-wrapper:hover .qr-code-overlay {
    opacity: 1;
}

.qr-code-overlay span {
    color: white;
    font-size: 14px;
    font-weight: 600;
    transform: translateY(10px);
    transition: all var(--transition-base);
}

.qr-code-image-wrapper:hover .qr-code-overlay span {
    transform: translateY(0);
}

.qr-code-description {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-top: var(--spacing-sm);
}

/* ========================================
   特别鸣谢
   ======================================== */

/* 更新说明区域 */
.update-notes {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.update-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    padding-left: 40px;
}

.update-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, rgba(102, 126, 234, 0.3) 0%, rgba(118, 75, 162, 0.3) 100%);
}

.update-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
    padding-left: var(--spacing-lg);
}

.update-item::before {
    content: '';
    position: absolute;
    left: -25px;
    top: 8px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--gradient-primary);
    border: 4px solid var(--bg-secondary);
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

.update-date {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.update-version {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.update-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.update-list li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.8;
}

.update-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 20px;
}

[data-theme="dark"] .update-notes {
    background: #1a1a1a;
}

[data-theme="dark"] .update-timeline::before {
    background: linear-gradient(180deg, rgba(102, 126, 234, 0.4) 0%, rgba(118, 75, 162, 0.4) 100%);
}

[data-theme="dark"] .update-item::before {
    border-color: #1a1a1a;
}

/* 小八系列区域 */
.xiaoba-series {
    padding: var(--spacing-xl) 0;
    background: var(--bg-primary);
}

.series-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: var(--spacing-lg);
    align-items: stretch;
}

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

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

.series-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px 24px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    min-height: 480px;
}

.series-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.series-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.4);
}

.series-card:hover::before {
    transform: scaleX(1);
}

.series-icon {
    font-size: 56px;
    margin-bottom: 20px;
    display: block;
    line-height: 1;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.series-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.3;
}

.series-subtitle {
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 500;
    margin-bottom: 16px;
    display: block;
    letter-spacing: 0.5px;
}

.series-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    font-size: 14px;
    flex-grow: 1;
}

.series-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.series-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(102, 126, 234, 0.08);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 6px;
    font-size: 12px;
    color: var(--primary-color);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.series-tag:hover {
    background: rgba(102, 126, 234, 0.12);
    border-color: rgba(102, 126, 234, 0.3);
}

.series-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.series-link:hover {
    gap: 12px;
    color: var(--primary-dark);
}

/* 系列卡片下载按钮区域 */
.series-downloads {
    display: flex;
    gap: 10px;
    flex-wrap: nowrap;
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    min-height: 64px;
    align-items: center;
}

.series-downloads .btn {
    flex: 1;
    min-width: 0;
    justify-content: center;
    text-align: center;
    font-weight: 600;
    white-space: nowrap;
    display: flex;
    align-items: center;
}

/* 教程链接区域 */
.series-tutorials {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    justify-content: center;
    flex-wrap: wrap;
    min-height: 40px;
    align-items: center;
}

.tutorial-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: all var(--transition-fast);
    padding: 8px 14px;
    border-radius: 8px;
    background: rgba(102, 126, 234, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.15);
    font-weight: 500;
}

.tutorial-link:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.3);
    transform: translateY(-1px);
}

.tutorial-link svg {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
}

[data-theme="dark"] .series-tutorials {
    border-top-color: rgba(102, 126, 234, 0.2);
}

[data-theme="dark"] .tutorial-link {
    color: #b0b0b0;
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.25);
}

[data-theme="dark"] .tutorial-link:hover {
    color: #ffffff;
    background: rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.4);
}

[data-theme="dark"] .series-downloads .btn-secondary {
    background: #242424;
    border-color: rgba(102, 126, 234, 0.4);
    color: #d0d0d0;
}

[data-theme="dark"] .series-downloads .btn-secondary:hover {
    background: rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.6);
    color: #ffffff;
}

.btn-small {
    padding: 12px 20px;
    font-size: 14px;
    border-radius: 8px;
    min-height: 44px;
    white-space: nowrap;
}

.series-downloads .btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.series-downloads .btn-primary:hover {
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transform: translateY(-1px);
}

.series-downloads .btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1.5px solid rgba(102, 126, 234, 0.3);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.series-downloads .btn-secondary:hover {
    background: rgba(102, 126, 234, 0.05);
    border-color: rgba(102, 126, 234, 0.5);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.15);
}


[data-theme="dark"] .xiaoba-series {
    background: #0f0f0f;
}

[data-theme="dark"] .series-card {
    background: #1a1a1a;
    border-color: rgba(102, 126, 234, 0.25);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .series-card:hover {
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.2);
}

[data-theme="dark"] .series-tag {
    background: rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
    color: #d0d0d0;
}

[data-theme="dark"] .series-tag:hover {
    background: rgba(102, 126, 234, 0.25);
    border-color: rgba(102, 126, 234, 0.4);
    color: #ffffff;
}

[data-theme="dark"] .series-downloads {
    border-top-color: rgba(102, 126, 234, 0.2);
}

[data-theme="dark"] .series-downloads .btn-secondary {
    background: #242424;
    border-color: rgba(102, 126, 234, 0.3);
    color: #d0d0d0;
}

[data-theme="dark"] .series-downloads .btn-secondary:hover {
    background: #2a2a2a;
    border-color: rgba(102, 126, 234, 0.5);
    color: #ffffff;
}

.acknowledgments {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.03) 0%, rgba(118, 75, 162, 0.03) 100%);
}

.thanks-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.thanks-content.thanks-extra {
    margin-top: var(--spacing-lg);
}

.thanks-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.thanks-card.full-width {
    grid-column: 1 / -1;
    max-width: 600px;
    margin: 0 auto;
}

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

.thanks-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.thanks-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.thanks-description {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 15px;
}

.contributors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
}

.contributor-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.contributor-item:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: scale(1.05);
}

.contributor-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-color);
}

.contributor-role {
    font-size: 13px;
    color: var(--text-tertiary);
}

.github-link {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.github-link p {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
}

.github-link svg {
    color: var(--text-primary);
}

/* 测试人员区域 */
.testers-section {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.testers-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.testers-title .icon {
    font-size: 28px;
}

.testers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.tester-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.tester-item.special {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(255, 165, 0, 0.15) 100%);
    border-color: #FFA500;
    font-weight: 600;
    color: #FF8C00;
}

.tester-item.special:hover {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.25) 0%, rgba(255, 165, 0, 0.25) 100%);
    border-color: #FF8C00;
}

.tester-item:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.testers-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 15px;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

/* ========================================
   页脚
   ======================================== */

.footer {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #ffffff;
    padding: var(--spacing-xl) 0 var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.5), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    margin-bottom: var(--spacing-sm);
}

.footer-logo {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    object-fit: cover;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-heading {
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: #ffffff;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: #ffffff;
    transition: all var(--transition-base);
    position: relative;
    overflow: visible;
    cursor: pointer;
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    z-index: 10001;
}

.qr-code-popup {
    position: absolute;
    bottom: calc(100% + 15px);
    left: 50%;
    transform: translateX(-50%) scale(0.9) translateY(5px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10002;
    pointer-events: none;
    white-space: nowrap;
}

.qr-code-popup::before {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid white;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.qr-code-popup img {
    width: 160px;
    height: 160px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    background: white;
    padding: 12px;
    display: block;
    object-fit: contain;
}

.social-link:hover .qr-code-popup {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) scale(1) translateY(0);
    pointer-events: auto;
}

.footer-section:last-child {
    position: relative;
    z-index: 1;
}

.social-links {
    position: relative;
    z-index: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   返回顶部按钮
   ======================================== */

.back-to-top {
    position: fixed !important;
    bottom: 40px !important;
    right: 40px !important;
    left: auto !important;
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0;
    filter: blur(10px);
    transition: opacity var(--transition-base);
    z-index: -1;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-6px) scale(1.1);
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.6);
}

.back-to-top:hover::before {
    opacity: 0.8;
}

/* ========================================
   响应式设计
   ======================================== */

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .hero-title {
        font-size: 56px;
    }
    
    .version-badge {
        font-size: 20px;
        padding: 6px 16px;
    }
    
    .hero-subtitle {
        font-size: 28px;
    }
    
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        backdrop-filter: blur(30px) saturate(180%);
        -webkit-backdrop-filter: blur(30px) saturate(180%);
        flex-direction: column;
        padding: var(--spacing-md) 0;
        box-shadow: 0 20px 60px rgba(102, 126, 234, 0.15),
                    0 0 0 1px rgba(102, 126, 234, 0.1);
        z-index: 999;
        border-top: 2px solid rgba(102, 126, 234, 0.1);
        height: auto;
        overflow: hidden;
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    [data-theme="dark"] .nav-links {
        background: #1a1a1a;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5),
                    0 0 0 1px rgba(102, 126, 234, 0.2);
        border-top-color: rgba(102, 126, 234, 0.3);
    }
    
    .nav-links.active {
        display: flex;
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-links li {
        width: 100%;
        margin: 0 var(--spacing-md);
        border-bottom: 1px solid rgba(102, 126, 234, 0.08);
        transition: all var(--transition-fast);
    }
    
    .nav-links li:first-child {
        margin-top: var(--spacing-sm);
    }
    
    .nav-links li:last-child {
        border-bottom: none;
        margin-bottom: var(--spacing-sm);
    }
    
    .nav-links li:hover {
        background: linear-gradient(90deg, rgba(102, 126, 234, 0.05) 0%, transparent 100%);
    }
    
    /* 移动端下拉菜单默认隐藏 */
    .nav-links.active .nav-dropdown .dropdown-menu {
        display: none;
    }
    
    .nav-links.active .nav-dropdown.active .dropdown-menu {
        display: block;
    }
    
    .nav-links.active .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-top: 1px solid rgba(102, 126, 234, 0.15);
        border-radius: 0;
        margin-top: 0;
        margin-left: 0;
        margin-right: 0;
        margin-bottom: 0;
        padding: 0;
        background: rgba(102, 126, 234, 0.08);
        width: 100%;
    }
    
    .nav-links.active .dropdown-menu li {
        margin: 0;
        border-bottom: 1px solid rgba(102, 126, 234, 0.1);
    }
    
    .nav-links.active .dropdown-menu li:last-child {
        border-bottom: none;
    }
    
    .nav-links.active .dropdown-menu a {
        padding: 16px var(--spacing-md);
        padding-left: 48px;
        font-size: 16px;
        color: var(--text-primary);
        font-weight: 500;
    }
    
    .nav-links.active .dropdown-menu a:hover {
        background: rgba(102, 126, 234, 0.12);
    }
    
    [data-theme="dark"] .nav-links.active .dropdown-menu {
        background: rgba(102, 126, 234, 0.15);
        border-top-color: rgba(102, 126, 234, 0.3);
    }
    
    [data-theme="dark"] .nav-links.active .dropdown-menu li {
        border-bottom-color: rgba(102, 126, 234, 0.2);
    }
    
    [data-theme="dark"] .nav-links.active .dropdown-menu a {
        color: #ffffff;
    }
    
    [data-theme="dark"] .nav-links.active .dropdown-menu a:hover {
        background: rgba(102, 126, 234, 0.25);
    }
    
    /* 移动端下拉菜单切换按钮样式 */
    .nav-links.active .dropdown-toggle {
        padding: 16px var(--spacing-md);
        width: 100%;
        font-size: 17px;
        font-weight: 600;
        color: var(--text-primary);
    }
    
    .nav-links.active .nav-dropdown {
        border-bottom: 1px solid rgba(102, 126, 234, 0.08);
    }
    
    .nav-links a {
        display: flex;
        align-items: center;
        padding: 16px var(--spacing-md);
        width: 100%;
        font-size: 17px;
        font-weight: 600;
        color: var(--text-primary);
        border-radius: 12px;
        position: relative;
        overflow: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-links a::before {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        width: 4px;
        background: var(--gradient-primary);
        transform: scaleY(0);
        transition: transform var(--transition-base);
        border-radius: 0 4px 4px 0;
    }
    
    .nav-links a:hover {
        color: #667eea;
        background: linear-gradient(90deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.05) 100%);
        padding-left: 20px;
    }
    
    .nav-links a:hover::before {
        transform: scaleY(1);
    }
    
    .nav-links a::after {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
        background: rgba(102, 126, 234, 0.1);
        border-radius: 8px;
        transition: all var(--transition-base);
    }
    
    .mobile-menu-toggle:hover {
        background: rgba(102, 126, 234, 0.15);
    }
    
    .mobile-menu-toggle.active {
        background: rgba(102, 126, 234, 0.2);
    }
    
    .mobile-menu-toggle span {
        background: var(--primary-color);
    }
    
    .mobile-menu-toggle.active span {
        background: #667eea;
    }
    
    .hero-title {
        font-size: 42px;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .version-badge {
        font-size: 18px;
        padding: 5px 14px;
    }
    
    .hero-subtitle {
        font-size: 24px;
    }
    
    .hero-description {
        font-size: 18px;
    }
    
    .countdown-timer {
        gap: 8px;
    }
    
    .countdown-item {
        min-width: 60px;
        padding: 12px 8px;
    }
    
    .countdown-value {
        font-size: 28px;
    }
    
    .countdown-unit {
        font-size: 12px;
    }
    
    .countdown-divider {
        font-size: 24px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-cta .btn-download {
        width: 100%;
        padding: 18px 32px;
        font-size: 18px;
    }
    
    .hero-cta-secondary {
        width: 100%;
        flex-direction: column;
    }
    
    .hero-cta-secondary .btn-medium {
        width: 100%;
    }
    
    .btn-large {
        width: 100%;
    }
    
    .download-options {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding: 0 var(--spacing-sm);
    }
    
    .download-options .btn {
        width: 100%;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .features-grid,
    .screenshots-container,
    .vehicles-grid,
    .specs-grid,
    .qr-codes-grid {
        grid-template-columns: 1fr;
    }
    
    .testers-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .qr-code-image-wrapper {
        width: 180px;
        height: 180px;
    }
    
    .social-icon {
        width: 56px;
        height: 56px;
    }
    
    .social-icon svg {
        width: 28px;
        height: 28px;
    }
    
    .screenshot-item.featured {
        grid-column: span 1;
    }
    
    .trial-banner {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-md);
    }
    
    .trial-info {
        text-align: center;
    }
    
    .trial-icon {
        font-size: 40px;
    }
    
    .trial-title {
        font-size: 18px;
    }
    
    .trial-description {
        font-size: 15px;
    }
    
    .trial-description .highlight {
        font-size: 20px;
    }
    
    .back-to-top {
        bottom: 20px !important;
        right: 20px !important;
        left: auto !important;
        width: 45px;
        height: 45px;
    }
    
    /* 价格卡片响应式优化 */
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .price-amount {
        font-size: 40px;
    }
    
    .pricing-card {
        padding: 28px 20px;
    }
    
    /* 优惠活动响应式优化 */
    .discount-notice {
        padding: var(--spacing-md);
        margin-top: var(--spacing-md);
    }
    
    .notice-icon {
        font-size: 28px;
    }
    
    .notice-title {
        font-size: 20px;
    }
    
    .discount-section-title {
        font-size: 16px;
    }
    
    .rule-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 12px;
    }
    
    .rule-label {
        font-size: 14px;
    }
    
    .rule-discount {
        font-size: 16px;
        align-self: flex-end;
    }
    
    .notice-tip {
        font-size: 13px;
    }
    
    .notice-tip-deadline {
        font-size: 13px;
        padding: 8px 12px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    .btn-large {
        padding: 14px 24px;
        font-size: 16px;
        min-width: auto;
    }
    
    .download-info {
        gap: var(--spacing-sm);
        flex-direction: column;
    }
    
    .info-item {
        font-size: 14px;
    }
    
    /* 价格卡片响应式优化 */
    .price-amount {
        font-size: 36px;
    }
    
    .price-symbol {
        font-size: 18px;
    }
    
    .price-period {
        font-size: 14px;
    }
    
    .pricing-card {
        padding: 24px 16px;
    }
    
    .pricing-title {
        font-size: 20px;
    }
    
    /* 优惠活动响应式优化 */
    .discount-notice {
        padding: 16px;
        margin-top: 16px;
        border-radius: 16px;
    }
    
    .notice-header {
        flex-direction: column;
        gap: 8px;
        margin-bottom: 16px;
    }
    
    .notice-icon {
        font-size: 24px;
    }
    
    .notice-title {
        font-size: 18px;
    }
    
    .discount-section {
        margin-bottom: 16px;
    }
    
    .discount-section-title {
        font-size: 14px;
        padding: 10px 12px;
    }
    
    .rule-item {
        padding: 10px 12px;
        gap: 6px;
    }
    
    .rule-label {
        font-size: 13px;
        line-height: 1.4;
    }
    
    .rule-discount {
        font-size: 15px;
        padding: 4px 10px;
    }
    
    .rule-item.highlight .rule-discount {
        font-size: 16px;
    }
    
    .notice-tip {
        font-size: 12px;
        line-height: 1.5;
        margin-top: 8px;
    }
    
    .notice-tip-deadline {
        font-size: 12px;
        padding: 8px 10px;
    }
    
    /* 移动端横幅优化 */
    .trial-banner {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-sm);
        gap: var(--spacing-sm);
    }
    
    .trial-icon {
        font-size: 40px;
    }
    
    .trial-title {
        font-size: 18px;
    }
    
    .trial-description {
        font-size: 14px;
    }
    
    .trial-badge {
        font-size: 12px;
        padding: 6px 16px;
    }
    
    /* 移动端导航栏优化 */
    .navbar {
        padding: 12px 16px;
    }
    
    .logo-text {
        font-size: 18px;
    }
    
    .logo-image {
        width: 32px;
        height: 32px;
    }
    
    /* 移动端特性卡片优化 */
    .feature-card {
        padding: 20px;
    }
    
    .feature-icon {
        font-size: 48px;
    }
    
    .feature-title {
        font-size: 20px;
    }
    
    .feature-description {
        font-size: 14px;
    }
    
    /* 移动端截图优化 */
    .screenshot-item {
        margin-bottom: var(--spacing-md);
    }
    
    .screenshot-item img {
        border-radius: 12px;
    }
    
    /* 移动端页脚优化 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    /* 移动端下载区域优化 */
    .download-content {
        padding: 0 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-subtitle {
        font-size: 14px;
    }
    
    /* 移动端导航栏优化 */
    .navbar {
        padding: 12px 16px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    }
    
    .logo-text {
        font-size: 16px;
    }
    
    .logo-image {
        width: 28px;
        height: 28px;
    }
    
    /* 移动端菜单进一步优化 */
    .nav-links {
        padding: var(--spacing-sm) 0;
    }
    
    .nav-links li {
        margin: 0 var(--spacing-sm);
    }
    
    .nav-links a {
        padding: 14px var(--spacing-sm);
        font-size: 16px;
    }
    
    .mobile-menu-toggle {
        padding: 6px;
    }
    
    .mobile-menu-toggle span {
        width: 22px;
        height: 2.5px;
    }
    
    /* 移动端Hero区域优化 */
    .hero {
        padding-top: 80px;
        padding-bottom: 40px;
    }
    
    /* 移动端特性卡片优化 */
    .feature-card {
        padding: 20px;
    }
    
    .feature-icon {
        font-size: 40px;
    }
    
    .feature-title {
        font-size: 18px;
    }
    
    .feature-description {
        font-size: 14px;
    }
    
    /* 移动端截图优化 */
    .screenshot-item {
        margin-bottom: var(--spacing-md);
    }
    
    .screenshot-item img {
        border-radius: 12px;
    }
    
    /* 移动端车辆卡片优化 */
    .vehicle-card {
        padding: var(--spacing-lg);
        border-radius: 20px;
    }
    
    .vehicle-icon {
        font-size: 64px;
        margin-bottom: var(--spacing-md);
    }
    
    .vehicle-title {
        font-size: 24px;
    }
    
    .vehicle-description {
        font-size: 14px;
    }
    
    .vehicle-note {
        font-size: 12px;
        padding: 8px 16px;
        max-width: 100%;
    }
    
    .vehicle-badge {
        padding: 8px 20px;
        font-size: 13px;
    }
    
    /* 移动端规格卡片优化 */
    .spec-item {
        padding: 20px;
    }
    
    /* 移动端Footer优化 */
    .footer {
        padding: var(--spacing-lg) 0 var(--spacing-md);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-section {
        margin-bottom: var(--spacing-md);
    }
    
    .footer-title {
        justify-content: center;
        font-size: 20px;
    }
    
    .footer-heading {
        font-size: 16px;
        margin-bottom: var(--spacing-sm);
    }
    
    .footer-description {
        font-size: 14px;
    }
    
    .footer-links {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }
    
    .footer-links li {
        margin-bottom: 0;
    }
    
    .footer-links a {
        font-size: 14px;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer-bottom {
        font-size: 12px;
        padding-top: var(--spacing-sm);
    }
    
    /* 移动端定价卡片优化 */
    .pricing-grid {
        gap: var(--spacing-md);
    }
    
    /* 移动端关注我们区域优化 */
    .qr-codes-grid {
        gap: var(--spacing-md);
    }
    
    /* 移动端特别鸣谢区域优化 */
    .testers-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .tester-item {
        font-size: 13px;
        padding: 8px 12px;
    }
    
    /* 移动端更新说明优化 */
    .update-timeline {
        padding-left: 30px;
    }
    
    .update-item {
        padding-left: var(--spacing-md);
    }
    
    .update-item::before {
        left: -20px;
        width: 16px;
        height: 16px;
    }
    
    .update-version {
        font-size: 18px;
    }
    
    .update-list li {
        font-size: 14px;
    }
    
    /* 移动端小八系列优化 */
    .series-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .series-card {
        padding: 24px;
    }
    
    .series-icon {
        font-size: 48px;
        margin-bottom: 16px;
    }
    
    .series-title {
        font-size: 20px;
    }
    
    .series-subtitle {
        font-size: 12px;
        margin-bottom: 12px;
    }
    
    .series-description {
        font-size: 14px;
        margin-bottom: 16px;
    }
    
    .series-features {
        margin-bottom: 16px;
    }
    
    .series-downloads {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 10px;
        padding-top: 16px;
    }
    
    .series-downloads .btn {
        flex: 1;
        min-width: calc(50% - 5px);
    }
    
    .series-tutorials {
        flex-direction: column;
        gap: 8px;
    }
    
    .tutorial-link {
        width: 100%;
        justify-content: center;
    }
}