/* ==================== 全局样式 ==================== */
:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #6366F1;
    --secondary-color: #10B981;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-dark: #111827;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
                 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

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

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.logo-image {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.logo-icon {
    font-size: 28px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

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

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

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

/* Hero 区域的白色按钮样式 */
.hero .btn-primary {
    background-color: white;
    color: var(--primary-color);
    border: 2px solid white;
}

.hero .btn-primary:hover {
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
}

.hero .btn-outline {
    color: white;
    border: 2px solid white;
}

.hero .btn-outline:hover {
    background-color: white;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

.btn-platform {
    padding: 8px 20px;
    font-size: 14px;
    background-color: #ffffff;
    color: #667eea;
    font-weight: 700;
    border: 2px solid #ffffff;
}

.btn-platform:hover {
    background-color: rgba(255, 255, 255, 0.95);
    color: #764ba2;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
}

/* ==================== Hero 区域 ==================== */
.hero {
    position: relative;
    padding: 150px 0 100px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 1;
}

.hero .container {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-title {
    margin-bottom: 20px;
}

.title-main {
    display: block;
    font-size: 64px;
    font-weight: 900;
    color: white;
    line-height: 1.2;
    margin-bottom: 8px;
}

.title-sub {
    display: block;
    font-size: 32px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
}

.hero-slogan {
    font-size: 28px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.hero-description {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
    justify-content: center;
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
}

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

.stat-number {
    font-size: 36px;
    font-weight: 900;
    color: white;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 32px;
    overflow: hidden;
}

.screen-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, #f0f0f0 0%, #e0e0e0 100%);
    color: #999;
    font-size: 14px;
}

/* ==================== 功能区域 ==================== */
.features {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

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

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.feature-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.feature-description {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 24px;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* ==================== 特色亮点 ==================== */
.highlights {
    padding: 100px 0;
    background: white;
}

.highlights-content {
    max-width: 1000px;
    margin: 0 auto;
}

.highlight-item {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.highlight-item.reverse {
    grid-template-columns: 1fr 300px;
}

.highlight-item.reverse .highlight-visual {
    order: 2;
}

.highlight-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.highlight-icon {
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 96px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
}

.highlight-text h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.highlight-text p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ==================== 用户评价 ==================== */
.testimonials {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.testimonial-card {
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.testimonial-rating {
    font-size: 20px;
    margin-bottom: 16px;
}

.testimonial-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.author-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.author-title {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ==================== 下载区域 ==================== */
.download {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.download-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.download-title {
    font-size: 42px;
    font-weight: 800;
    color: white;
    margin-bottom: 16px;
}

.download-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
}

.download-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.download-platforms {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.platform-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.platform-icon {
    font-size: 40px;
}

.platform-info {
    flex: 1;
}

.platform-name {
    font-size: 18px;
    font-weight: 600;
    color: white;
    margin-bottom: 4px;
}

.platform-req {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.download-qr {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.qr-code {
    width: 200px;
    height: 200px;
    background: white;
    border-radius: 12px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.qr-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.qr-hint {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    margin-bottom: 8px;
}

.qr-url-text {
    color: rgba(255, 255, 255, 0.8);
    font-size: 12px;
    word-break: break-all;
    padding: 0 20px;
}

.phones-mockup {
    display: flex;
    justify-content: center;
}

.phone-mockup-small {
    width: 280px;
    height: 560px;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

.phone-mockup-small .screen-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #f0f0f0 0%, #e0e0e0 100%);
    border-radius: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
}

/* ==================== 关于我们 ==================== */
.about {
    padding: 100px 0;
    background: white;
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.about-text h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    margin-top: 32px;
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.contact-info {
    margin-top: 16px;
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.about-stat {
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: 12px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.about-stat .stat-icon {
    font-size: 48px;
}

.about-stat .stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.about-stat .stat-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 16px;
}

.footer-slogan {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: white;
}

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

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

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

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

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .highlight-item,
    .highlight-item.reverse {
        grid-template-columns: 1fr;
    }
    
    .highlight-item.reverse .highlight-visual {
        order: 0;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-features {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .title-main {
        font-size: 42px;
    }
    
    .title-sub {
        font-size: 24px;
    }
    
    .hero-slogan {
        font-size: 20px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .download-wrapper {
        flex-direction: column;
        gap: 32px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
}