/* 夸克浏览器官网样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #00d2ff;
    --primary-dark: #0099cc;
    --bg-dark: #0a0a1a;
    --bg-card: #12122a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0c0;
    --accent: #ff6b35;
}

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

/* 导航栏 */
header {
    background: rgba(10, 10, 26, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 210, 255, 0.1);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.95rem;
}

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

/* 主容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

main {
    padding-top: 80px;
}

/* Hero区域 */
.hero {
    text-align: center;
    padding: 4rem 2rem 3rem;
    background: linear-gradient(180deg, rgba(0, 210, 255, 0.1) 0%, transparent 100%);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 1.5rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--bg-dark);
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 210, 255, 0.3);
}

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

.btn-secondary:hover {
    background: rgba(0, 210, 255, 0.1);
}

/* 内容卡片 */
.content-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    margin: 2rem 0;
    border: 1px solid rgba(0, 210, 255, 0.1);
}

.content-card h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.content-card h3 {
    font-size: 1.3rem;
    margin: 1.5rem 0 0.8rem;
    color: var(--text-primary);
}

.content-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* 功能卡片网格 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.feature-card {
    background: rgba(0, 210, 255, 0.05);
    border: 1px solid rgba(0, 210, 255, 0.1);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.3s, border-color 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin: 0.5rem 0;
    font-size: 1.2rem;
}

.feature-card p {
    margin: 0;
    font-size: 0.9rem;
}

/* 下载卡片 */
.download-card {
    background: rgba(255, 107, 53, 0.05);
    border: 1px solid rgba(255, 107, 53, 0.2);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1rem 0;
}

.download-card h3,
.download-card h4 {
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.download-card p {
    margin: 0.3rem 0;
    font-size: 0.9rem;
}

.download-link {
    display: inline-block;
    margin-top: 0.8rem;
    padding: 0.6rem 1.5rem;
    background: linear-gradient(135deg, var(--accent), #ff8855);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
}

.download-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
}

/* 步骤 */
.step {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin: 1rem 0;
    padding: 1rem;
    background: rgba(0, 210, 255, 0.03);
    border-radius: 8px;
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--bg-dark);
    flex-shrink: 0;
}

.step-content p {
    margin: 0;
}

/* 提示框 */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.alert-info {
    background: rgba(0, 210, 255, 0.1);
    border-left: 4px solid var(--primary);
}

.alert-warning {
    background: rgba(255, 107, 53, 0.1);
    border-left: 4px solid var(--accent);
}

/* 表单 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.8rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* 页脚 */
footer {
    background: var(--bg-card);
    padding: 3rem 2rem;
    margin-top: 4rem;
    text-align: center;
    border-top: 1px solid rgba(0, 210, 255, 0.1);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero {
        padding: 3rem 1rem 2rem;
    }
    
    .content-card {
        padding: 1.5rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}