/* ImageTwin 图片查重系统 - 主样式文件 */
/* 浅蓝色主题设计 - 正气权威大气精致风格 */

/* ==================== 基础样式重置 ==================== */
:root {
    /* 浅蓝色主题色彩系统 */
    --primary-blue: #1976d2;
    --light-blue: #42a5f5;
    --pale-blue: #e3f2fd;
    --sky-blue: #bbdefb;
    --deep-blue: #1565c0;
    --accent-blue: #2196f3;
    
    /* 中性色彩 */
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --gray: #6c757d;
    --dark-gray: #343a40;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    
    /* 功能色彩 */
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    
    /* 间距系统 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* 阴影系统 */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --shadow-blue: 0 4px 15px rgba(25, 118, 210, 0.3);
    
    /* 边框圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* 过渡动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 全局重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--white);
    overflow-x: hidden;
}

/* ==================== 通用组件样式 ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--light-blue));
    border-radius: 2px;
}

/* 按钮系统 */
.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    min-width: 160px;
    gap: var(--spacing-xs);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    color: var(--white);
    box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(25, 118, 210, 0.4);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

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

.btn-secondary {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-1px);
}

/* ==================== 页头导航 ==================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: transform var(--transition-normal);
}

.navbar {
    padding: var(--spacing-sm) 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand .logo {
    height: 45px;
    width: auto;
}

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

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-blue);
    background: var(--pale-blue);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width var(--transition-fast);
}

.nav-link:hover::after {
    width: 80%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    transition: all var(--transition-fast);
    border-radius: 2px;
}

/* ==================== 首屏Banner ==================== */
.hero-banner {
    background: linear-gradient(135deg, var(--pale-blue) 0%, var(--sky-blue) 100%);
    padding: calc(80px + 60px) 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23ffffff" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
}

.hero-banner::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(180deg, transparent, var(--white));
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--deep-blue);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.5;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.trust-badge {
    margin-top: var(--spacing-lg);
    font-size: 0.95rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.trust-icon {
    width: 20px;
    height: 20px;
    background: var(--success);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 12px;
    font-weight: bold;
}

/* ==================== 快速导航 ==================== */
.quick-nav {
    padding: var(--spacing-lg) 0;
    background: var(--light-gray);
}

.nav-pills {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.pill-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--white);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    font-weight: 500;
}

.pill-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: var(--primary-blue);
    color: var(--white);
}

.pill-icon {
    font-size: 1.2rem;
}

/* ==================== 痛点问题区域 ==================== */
.pain-points {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.pain-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--light-gray);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.pain-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--danger), #ff6b6b);
}

.pain-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.pain-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.pain-item h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.pain-item p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.stats-highlight {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xxl);
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--danger);
    display: block;
}

.stat-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: var(--spacing-xs);
}

/* ==================== 解决方案区域 ==================== */
.solution {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--pale-blue), var(--white));
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.solution-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.solution-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.solution-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.solution-content {
    padding: var(--spacing-lg);
}

.solution-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.solution-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.benefit {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--pale-blue);
    color: var(--primary-blue);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    margin-top: var(--spacing-sm);
}

/* ==================== 功能特色区域 ==================== */
.features {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
}

.features-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.feature-demo {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

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

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.feature-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.feature-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.feature-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ==================== 检测流程区域 ==================== */
.how-it-works {
    padding: var(--spacing-xxl) 0;
    background: var(--light-gray);
}

.steps-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
    flex-wrap: wrap;
}

.step-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
    min-width: 200px;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-blue);
}

.step-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.step-arrow {
    position: absolute;
    right: -30px;
    top: 30px;
    font-size: 1.5rem;
    color: var(--primary-blue);
    font-weight: bold;
}

.step-item:last-child .step-arrow {
    display: none;
}

.demo-section {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.demo-section h3 {
    text-align: center;
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-lg);
}

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

.demo-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.demo-info h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.demo-info ul {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.demo-info li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.demo-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--pale-blue);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.demo-link:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-1px);
}

/* ==================== 价格方案区域 ==================== */
.pricing {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
}

.pricing-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    position: relative;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--light-blue));
}

.price-header {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--pale-blue), var(--sky-blue));
    position: relative;
}

.price-badge {
    display: inline-block;
    background: var(--primary-blue);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.price-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

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

.amount {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.unit {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.price-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.price-features {
    padding: var(--spacing-xl);
}

.feature-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--text-primary);
    font-size: 0.95rem;
    border-bottom: 1px solid var(--light-gray);
}

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

.price-comparison {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
}

.price-comparison h4 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-sm);
    text-align: center;
    border-bottom: 1px solid var(--light-gray);
}

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

.comparison-table tr.highlight {
    background: var(--pale-blue);
}

.comparison-table tr.highlight td {
    font-weight: 600;
    color: var(--primary-blue);
}

.pricing-cta {
    margin: var(--spacing-xl);
    width: calc(100% - 2 * var(--spacing-xl));
    font-size: 1.2rem;
    padding: var(--spacing-lg);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .features-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .demo-preview {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 300px;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        gap: var(--spacing-sm);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .pain-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .stats-highlight {
        gap: var(--spacing-lg);
    }
    
    .steps-container {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .step-arrow {
        display: none;
    }
    
    .trust-badge {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .price-amount .amount {
        font-size: 3rem;
    }
    
    .comparison-table {
        font-size: 0.8rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-xs);
    }
}

/* ==================== 动画效果 ==================== */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* 移除滚动动画，确保所有内容直接显示 */
.pain-item,
.solution-item,
.feature-item,
.step-item,
.pricing-card,
.testimonial-item,
.scenario-item,
.advantage-item,
.faq-category,
.tip-item {
    opacity: 1 !important;
    transform: none !important;
    visibility: visible !important;
}

/* ==================== 可访问性优化 ==================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 焦点可见性 */
*:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    :root {
        --primary-blue: #0056b3;
        --text-secondary: #000000;
    }
}

/* ==================== 信任背书区域 ==================== */
.trust-section {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--white), var(--pale-blue));
}

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

.trust-stat {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.trust-stat:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.trust-stat .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.trust-stat .stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.partners-section {
    margin-bottom: var(--spacing-xxl);
}

.partners-section h3 {
    text-align: center;
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    align-items: center;
}

.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    height: 80px;
}

.partner-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.partner-item img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(100%);
    transition: filter var(--transition-normal);
}

.partner-item:hover img {
    filter: grayscale(0%);
}

.testimonials h3 {
    text-align: center;
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial-item {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
}

.testimonial-item::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 20px;
    font-size: 4rem;
    color: var(--primary-blue);
    opacity: 0.2;
    font-family: serif;
}

.testimonial-content p {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--pale-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.author-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ==================== 使用场景区域 ==================== */
.scenarios {
    padding: var(--spacing-xxl) 0;
    background: var(--light-gray);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.scenario-item {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.scenario-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--light-blue));
}

.scenario-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.scenario-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.scenario-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.scenario-item p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.scenario-benefit {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--pale-blue);
    color: var(--primary-blue);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    margin-top: var(--spacing-sm);
}

/* ==================== 技术优势区域 ==================== */
.advantages {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
}

.advantages-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.advantage-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

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

.advantage-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    padding: var(--spacing-md);
    background: var(--light-gray);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.advantage-item:hover {
    background: var(--pale-blue);
    transform: translateX(5px);
}

.advantage-icon {
    flex-shrink: 0;
    font-size: 2rem;
    width: 50px;
    text-align: center;
}

.advantage-info h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.advantage-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

/* ==================== FAQ区域 ==================== */
.faq {
    padding: var(--spacing-xxl) 0;
    background: var(--light-gray);
}

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

.faq-category {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.faq-category h3 {
    background: var(--primary-blue);
    color: var(--white);
    padding: var(--spacing-md);
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.faq-items {
    padding: var(--spacing-md);
}

.faq-item {
    border-bottom: 1px solid var(--light-gray);
    padding: var(--spacing-md) 0;
}

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

.faq-question {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.faq-answer {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.faq-cta {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.faq-cta p {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

/* ==================== 提示区域 ==================== */
.tips {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.tip-item {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
}

.tip-item.important {
    background: linear-gradient(135deg, #fff3cd, #ffeaa7);
    border-left: 4px solid var(--warning);
}

.tip-item.helpful {
    background: linear-gradient(135deg, #d1ecf1, #b8e6ff);
    border-left: 4px solid var(--info);
}

.tip-item.security {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    border-left: 4px solid var(--success);
}

.tip-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.tip-item h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.tip-item ul {
    list-style: none;
    padding: 0;
}

.tip-item li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    position: relative;
    padding-left: var(--spacing-md);
}

.tip-item li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

/* ==================== 最终CTA区域 ==================== */
.final-cta {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    color: var(--white);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.cta-subtitle {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.1rem;
    font-weight: 500;
}

.feature-icon {
    font-size: 1.3rem;
}

.final-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.final-cta-btn {
    background: var(--white);
    color: var(--primary-blue);
    font-size: 1.2rem;
    padding: var(--spacing-lg) var(--spacing-xl);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.final-cta-btn:hover {
    background: var(--light-gray);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.final-trust {
    font-size: 0.95rem;
    opacity: 0.8;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.footer-logo {
    margin-bottom: var(--spacing-md);
    filter: brightness(0) invert(1);
}

.footer-desc {
    color: #ccc;
    font-size: 0.9rem;
    line-height: 1.6;
}

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

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.contact-info p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    color: #ccc;
}

.contact-info a {
    color: var(--light-blue);
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid #555;
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-copyright p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.85rem;
    color: #ccc;
}

.footer-certifications {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.cert-badge {
    background: var(--primary-blue);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
}

/* ==================== 响应式更新 ==================== */
@media (max-width: 1024px) {
    .advantages-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .cta-features {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .trust-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .scenarios-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .final-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .final-cta-btn {
        width: 100%;
        max-width: 350px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .trust-stats {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-content h2 {
        font-size: 1.8rem;
    }
    
    .cta-subtitle {
        font-size: 1rem;
    }
}

/* ==================== 打印样式 ==================== */
@media print {
    .header,
    .nav-toggle,
    .cta-buttons,
    .btn-primary,
    .btn-secondary,
    .final-cta,
    .footer {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .section-title {
        font-size: 18pt;
        page-break-after: avoid;
    }
    
    .pain-item,
    .solution-item,
    .feature-item,
    .testimonial-item,
    .scenario-item {
        page-break-inside: avoid;
    }
}