/* ==========================================
   KINGGOO FILES 官网样式
   设计语言：现代、企业、蓝紫渐变
   ========================================== */

/* ---------- CSS 变量 ---------- */
:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary: #8b5cf6;
    --gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-hover: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    --border: #e2e8f0;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
    --radius: 16px;
    --radius-sm: 8px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

/* ---------- 导航栏 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    padding: 0 0;
    height: 68px;
    display: flex;
    align-items: center;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
}

.brand-icon {
    font-size: 1.5rem;
}

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

.brand-light {
    color: var(--primary);
    font-weight: 300;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

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

.btn-nav {
    background: var(--gradient);
    color: white !important;
    padding: 8px 20px;
    border-radius: 24px;
    font-weight: 500;
    transition: var(--transition);
}

.btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
    color: white !important;
}

/* 移动端菜单 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ---------- Hero 区域 ---------- */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(180deg, #f0f4ff 0%, var(--bg-primary) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.badge {
    display: inline-block;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 16px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin-bottom: 32px;
}

.hero-desc .highlight {
    color: var(--primary);
    font-weight: 600;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    padding: 12px 32px;
    border-radius: 30px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    display: inline-block;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
    color: white;
}

.btn-secondary {
    color: var(--text-secondary);
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* 统计数字 */
.hero-stats {
    display: flex;
    gap: 48px;
}

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

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

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ---------- 预览卡片 ---------- */
.preview-card {
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border);
}

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

.preview-header .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.preview-header .red { background: #ef4444; }
.preview-header .yellow { background: #f59e0b; }
.preview-header .green { background: #10b981; }

.preview-title {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-left: 8px;
    font-weight: 500;
}

.preview-body {
    display: flex;
    padding: 16px;
    gap: 16px;
    min-height: 280px;
}

.preview-sidebar {
    width: 100px;
    flex-shrink: 0;
}

.preview-folder {
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition);
    cursor: default;
}

.preview-folder.active {
    background: var(--gradient);
    color: white;
}

.preview-files {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.preview-file {
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition);
    cursor: default;
    display: flex;
    align-items: center;
    gap: 8px;
}

.preview-file:hover {
    background: var(--bg-secondary);
}

/* ---------- 通用 Section ---------- */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-tag {
    display: inline-block;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ---------- 功能亮点 ---------- */
.features {
    background: var(--bg-secondary);
}

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

.feature-card {
    background: var(--bg-primary);
    padding: 32px 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.feature-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ---------- 授权亮点 ---------- */
.license-highlight {
    background: var(--bg-primary);
}

.license-box {
    display: flex;
    align-items: center;
    gap: 32px;
    background: var(--bg-secondary);
    padding: 32px 40px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    flex-wrap: wrap;
}

.license-icon {
    font-size: 2.5rem;
}

.license-content {
    flex: 1;
}

.license-content h3 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.license-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.license-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: rgba(59, 130, 246, 0.08);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* ---------- 技术特性 ---------- */
.tech-features {
    background: var(--bg-primary);
    padding: 40px 0 60px;
}

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

.tech-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.tech-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.tech-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.tech-item h4 {
    font-size: 0.95rem;
    margin-bottom: 2px;
}

.tech-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ---------- 授权购买 ---------- */
.pricing {
    background: var(--bg-secondary);
}

.pricing-table-wrap {
    max-width: 600px;
    margin: 0 auto 32px;
}

.pricing-table {
    background: var(--bg-primary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.table-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    padding: 14px 24px;
    border-bottom: 1px solid var(--border-secondary);
    font-size: 0.95rem;
    transition: var(--transition);
}

.table-row:last-child {
    border-bottom: none;
}

.table-row.header {
    background: var(--gradient);
    color: white;
    font-weight: 600;
    border-bottom: none;
}

.table-row.header span {
    color: white;
}

.table-row span:first-child {
    font-weight: 600;
    color: var(--text-primary);
}

.table-row span:nth-child(2) {
    color: var(--primary);
    font-weight: 700;
}

.table-row span:last-child {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.table-row.featured-row {
    background: rgba(59, 130, 246, 0.05);
    border-left: 3px solid var(--primary);
}

.table-row.featured-row span:first-child {
    color: var(--primary);
}

.table-row:hover:not(.header) {
    background: var(--bg-secondary);
}

.pricing-contact {
    text-align: center;
    margin-top: 16px;
}

.pricing-contact p {
    margin-bottom: 16px;
    font-size: 1rem;
    color: var(--text-secondary);
}

.pricing-contact p strong {
    color: var(--primary);
}

.pricing-contact .btn-primary {
    padding: 12px 48px;
}

/* ---------- 关于 ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-size: 1.05rem;
}

.contact-info {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.about-card {
    background: var(--gradient);
    color: white;
    padding: 48px 32px;
    border-radius: var(--radius);
    text-align: center;
}

.about-emoji {
    font-size: 3rem;
    display: block;
    margin-bottom: 12px;
}

.about-card h4 {
    font-size: 1.3rem;
    margin-bottom: 4px;
}

.about-card p {
    opacity: 0.85;
}

/* ---------- 下载区域 ---------- */
.download {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.download-box {
    text-align: center;
    background: var(--bg-primary);
    padding: 60px 40px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
}

.download-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.download-box h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.download-box > p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

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

.btn-download {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-secondary);
    padding: 14px 28px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    font-weight: 500;
    transition: var(--transition);
}

.btn-download:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

.version {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 400;
}

.download-note {
    margin-top: 24px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.download-note strong {
    color: var(--primary);
}

/* ---------- 页脚 ---------- */
.footer {
    background: var(--text-primary);
    color: rgba(255, 255, 255, 0.7);
    padding: 48px 0 24px;
}

.footer .brand-name {
    color: white;
}

.footer .brand-light {
    color: var(--primary-light);
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand p {
    font-size: 0.85rem;
    opacity: 0.7;
    margin-top: 4px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    transition: var(--transition);
}

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

.footer-social {
    display: flex;
    gap: 16px;
    font-size: 1.3rem;
}

.footer-social a {
    transition: var(--transition);
}

.footer-social a:hover {
    color: white;
    transform: scale(1.1);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    font-size: 0.8rem;
}

.footer-credit {
    margin-top: 4px;
    opacity: 0.6;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .hero-grid {
        gap: 40px;
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        padding: 20px;
        border-bottom: 1px solid var(--border);
        gap: 16px;
        box-shadow: var(--shadow);
    }
    
    .nav-links.open {
        display: flex;
    }
    
    .btn-nav {
        width: 100%;
        text-align: center;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .license-box {
        flex-direction: column;
        text-align: center;
        padding: 24px;
    }
    
    .license-tags {
        justify-content: center;
    }
    
    .footer-grid {
        flex-direction: column;
        text-align: center;
    }
    
    .preview-body {
        flex-direction: column;
    }
    
    .preview-sidebar {
        width: 100%;
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .table-row {
        font-size: 0.85rem;
        padding: 12px 16px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-download {
        width: 100%;
        justify-content: center;
    }
    
    .table-row {
        grid-template-columns: 1fr 1fr 1fr;
        font-size: 0.75rem;
        padding: 10px 12px;
    }
}