/**
 * 印创软件官网样式表
 * 印刷厂开单管理系统官方网站
 */

/* ========== 基础变量 ========== */
:root {
    /* 主色调 */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;

    /* 辅助色 */
    --secondary-color: #0ea5e9;
    --accent-color: #8b5cf6;

    /* 中性色 */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;

    /* 功能色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;

    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;

    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
}

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

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

ul, ol {
    list-style: none;
}

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

/* ========== 容器 ========== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

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

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

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

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.0625rem;
}

.btn-block {
    width: 100%;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 36px;
    padding: 0 12px;
    background: #1890ff;
    color: white;
    border-radius: 6px;
    font-size: 14px;
    font-weight: bold;
    white-space: nowrap;
}

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

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

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

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

/* ========== 首页横幅 ========== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

.hero-content .highlight {
    color: var(--primary-color);
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
}

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

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* 仪表盘预览 */
.dashboard-preview {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.preview-header {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

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

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.preview-content {
    display: flex;
    min-height: 300px;
}

.preview-sidebar {
    width: 60px;
    background: var(--bg-light);
    border-right: 1px solid var(--border-color);
}

.preview-main {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.preview-card {
    height: 60px;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-color));
    border-radius: var(--radius-md);
    opacity: 0.8;
}

.preview-card:nth-child(2) {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    width: 70%;
}

.preview-table {
    flex: 1;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

/* ========== 功能介绍 ========== */
.features {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.feature-card {
    padding: var(--spacing-xl);
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== 套餐价格 ========== */
.pricing {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

.pricing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.toggle-label {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.toggle-label.active {
    color: var(--text-primary);
    font-weight: 600;
}

.save-badge {
    display: inline-block;
    padding: 2px 8px;
    background: var(--success-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.toggle-switch {
    position: relative;
    width: 48px;
    height: 26px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

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

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(22px);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    position: relative;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

.pricing-card:hover {
    box-shadow: var(--shadow-lg);
}

.pricing-card.popular {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.pricing-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.pricing-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

.pricing-price {
    display: flex;
    align-items: baseline;
    margin-bottom: var(--spacing-lg);
}

.currency {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.amount {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.period {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-left: var(--spacing-xs);
}

.pricing-features {
    margin-bottom: var(--spacing-xl);
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.check, .cross {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    flex-shrink: 0;
}

.check {
    background: var(--success-color);
}

.check::before {
    content: '';
    width: 8px;
    height: 5px;
    border: 2px solid white;
    border-top: none;
    border-right: none;
    transform: rotate(-45deg);
    margin-top: -2px;
}

.cross {
    background: var(--border-color);
}

.cross::before {
    content: '';
    width: 8px;
    height: 2px;
    background: var(--text-muted);
}

.pricing-note {
    text-align: center;
    margin-top: var(--spacing-xl);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ========== 关于我们 ========== */
.about {
    padding: var(--spacing-3xl) 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.about-text > p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

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

.about-feature {
    display: flex;
    gap: var(--spacing-md);
}

.about-feature-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

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

.about-feature h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.about-feature p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
}

.stat-card .stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

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

/* ========== 联系我们 ========== */
.contact {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
    color: white;
}

.contact-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

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

.contact-note {
    font-size: 0.8125rem !important;
    color: var(--text-muted) !important;
}

.contact-form {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

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

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    background: var(--bg-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

/* ========== 页脚 ========== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-3xl) 0 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: var(--spacing-md);
}

.footer-brand .logo-text {
    color: white;
}

.footer-brand p {
    font-size: 0.9375rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: var(--spacing-3xl);
}

.footer-column h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-column a {
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.footer-legal {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-legal a {
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

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

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

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-desc {
        margin: 0 auto var(--spacing-xl);
    }

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

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

    .hero-image {
        display: none;
    }

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

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

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

    .about-content {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }
}

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

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

    .hero {
        padding: 120px 0 60px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-lg);
    }

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

    .section-header h2 {
        font-size: 1.75rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-2xl);
    }

    .footer-links {
        flex-wrap: wrap;
        gap: var(--spacing-xl);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

/* ========== 移动端菜单 ========== */
.nav-links.mobile-active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

.nav-actions.mobile-active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: calc(70px + 200px);
    left: 0;
    right: 0;
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

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

.hero-content,
.feature-card,
.pricing-card,
.about-feature,
.stat-card {
    animation: fadeInUp 0.6s ease forwards;
}

.feature-card:nth-child(2) { animation-delay: 0.1s; }
.feature-card:nth-child(3) { animation-delay: 0.2s; }
.feature-card:nth-child(4) { animation-delay: 0.3s; }
.feature-card:nth-child(5) { animation-delay: 0.4s; }
.feature-card:nth-child(6) { animation-delay: 0.5s; }

/* ========== 套餐价格 ========== */
.pricing {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

.pricing .container {
    max-width: 1400px;
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.plan-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    position: relative;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.plan-card.popular {
    border: 2px solid var(--primary-color);
}

.plan-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    padding: 4px 16px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.plan-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.plan-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
}

.plan-price {
    margin-bottom: var(--spacing-lg);
}

.plan-price-amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.plan-price-unit {
    font-size: 1rem;
    color: var(--text-muted);
}

.plan-price-custom {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.plan-features {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--spacing-xl) 0;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.plan-features li svg {
    width: 18px;
    height: 18px;
    color: var(--success-color);
    flex-shrink: 0;
}

/* ========== 客户展示 ========== */
.customers {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-white);
}

.customers-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.customer-item {
    background: var(--bg-light);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.customer-item:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* ========== 功能详情展示 ========== */
.feature-details {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

.feature-detail-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    padding: var(--spacing-3xl) 0;
    border-bottom: 1px solid var(--border-color);
}

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

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

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

.feature-tag {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

.feature-detail-content h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.feature-detail-content > p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

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

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.feature-list li svg {
    width: 20px;
    height: 20px;
    color: var(--success-color);
    flex-shrink: 0;
    margin-top: 2px;
}

.feature-detail-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 4/3;
    background: var(--bg-white);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    color: var(--text-muted);
    transition: all var(--transition-normal);
}

.image-placeholder:hover {
    border-color: var(--primary-light);
    background: var(--bg-light);
}

.image-placeholder svg {
    width: 64px;
    height: 64px;
    opacity: 0.5;
}

.image-placeholder span {
    font-size: 1rem;
    font-weight: 500;
}

/* ========== 更多功能 ========== */
.more-features {
    padding: var(--spacing-3xl) 0;
}

.more-features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.more-feature-item {
    padding: var(--spacing-lg);
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.more-feature-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.more-feature-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.more-feature-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

.more-feature-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.more-feature-item p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ========== 产品截图展示 ========== */
.screenshots {
    padding: var(--spacing-3xl) 0;
    padding-top: var(--spacing-2xl);
    background: var(--bg-light);
}

.screenshots .container {
    max-width: 1400px;
}

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

.screenshot-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.screenshot-tab {
    padding: 0.625rem 1.5rem;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

.screenshot-content {
    width: 100%;
}

.screenshot-item {
    display: none;
}

.screenshot-item.active {
    display: block;
    width: 100%;
}

.screenshot-frame {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
    width: 100%;
    height: 700px;
}

.screenshot-frame img {
    width: 100%;
    height: 100%;
    object-fit: fill;
    border-radius: var(--radius-lg);
}

.screenshot-placeholder {
    width: 100%;
    min-height: 700px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-3xl);
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-white) 100%);
    color: var(--text-muted);
}

.screenshot-placeholder svg {
    width: 80px;
    height: 80px;
    opacity: 0.4;
}

.screenshot-placeholder span {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.screenshot-placeholder p {
    font-size: 0.9375rem;
    max-width: 400px;
    text-align: center;
    line-height: 1.6;
}

/* ========== 响应式补充 ========== */
@media (max-width: 1024px) {
    .feature-detail-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

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

    .feature-detail-content {
        text-align: center;
    }

    .feature-list {
        text-align: left;
        max-width: 500px;
        margin: 0 auto;
    }

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

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

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

    .screenshot-frame {
        height: 400px;
    }

    .screenshot-placeholder {
        min-height: 400px;
        padding: var(--spacing-xl);
    }

    .feature-detail-content h3 {
        font-size: 1.5rem;
    }

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

    .screenshot-tabs {
        gap: var(--spacing-xs);
    }

    .screenshot-tab {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}