/* QuickQ 全局样式 */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #0ea5e9;
    --accent: #06b6d4;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --light: #f1f5f9;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
    --shadow: 0 4px 20px rgba(37, 99, 235, 0.15);
    --shadow-lg: 0 10px 40px rgba(37, 99, 235, 0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: var(--white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 15px 0;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo span {
    font-weight: 400;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    font-weight: 500;
    color: var(--gray);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

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

.nav-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

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

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

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

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

/* Hero区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(180deg, #f0f9ff 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero h1 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.25rem;
    color: var(--gray);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 60px;
    flex-wrap: wrap;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gray);
    font-size: 0.95rem;
}

.hero-feature i {
    color: var(--primary);
    font-size: 1.2rem;
}

/* 功能区块 */
.features {
    padding: 100px 0;
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.section-header p {
    color: var(--gray);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 16px;
    padding: 35px;
    transition: all 0.3s ease;
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* 用户场景 */
.scenarios {
    padding: 100px 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

@media (max-width: 900px) {
    .scenario-grid {
        grid-template-columns: 1fr;
    }
}

.scenario-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.scenario-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.scenario-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2.5rem;
    color: var(--white);
}

.scenario-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.scenario-card p {
    color: var(--gray);
}

/* 数据统计 */
.stats {
    padding: 80px 0;
    background: var(--dark);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.stat-item h3 {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-item p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
}

/* 技术特点 */
.tech {
    padding: 100px 0;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

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

.tech-item {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: var(--light);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.tech-item:hover {
    background: var(--white);
    box-shadow: var(--shadow);
}

.tech-num {
    width: 40px;
    height: 40px;
    background: var(--gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    flex-shrink: 0;
}

.tech-content h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.tech-content p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* FAQ */
.faq {
    padding: 100px 0;
    background: var(--light);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: 12px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

.faq-question {
    padding: 20px 25px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.faq-question:hover {
    color: var(--primary);
}

.faq-answer {
    padding: 0 25px 20px;
    color: var(--gray);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* 下载区域 */
.download-section {
    padding: 100px 0;
    background: var(--dark);
    color: var(--white);
}

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

.download-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.download-content > p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
}

.download-platforms {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.platform-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 35px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: var(--white);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.platform-btn:hover {
    background: var(--white);
    color: var(--dark);
    transform: translateY(-3px);
}

.platform-btn i {
    font-size: 1.5rem;
}

.download-highlights {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.8);
}

.highlight-item i {
    color: #22c55e;
}

/* 页脚 */
.footer {
    padding: 60px 0 30px;
    background: var(--dark-light);
    color: rgba(255, 255, 255, 0.7);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

.footer-brand .logo {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer-links h4 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1rem;
}

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

.footer-links li {
    margin-bottom: 12px;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    font-size: 0.9rem;
}

/* 页面标题 */
.page-header {
    padding: 150px 0 80px;
    background: linear-gradient(180deg, #f0f9ff 0%, #ffffff 100%);
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
}

.page-header p {
    color: var(--gray);
    font-size: 1.2rem;
}

/* 下载页面 */
.download-page {
    padding: 80px 0;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.download-card {
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s ease;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.download-card-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2rem;
    color: var(--white);
}

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.download-card p {
    color: var(--gray);
    margin-bottom: 25px;
}

.download-card .version {
    font-size: 0.85rem;
    color: var(--gray);
    margin-bottom: 20px;
}

.download-card .btn {
    width: 100%;
}

/* 404页面 */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.error-content h1 {
    font-size: 8rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 20px;
}

.error-content h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.error-content p {
    color: var(--gray);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.error-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* 响应式 */
@media (max-width: 768px) {
    .navbar .nav-links,
    .navbar .nav-buttons {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .error-content h1 {
        font-size: 5rem;
    }
}