* {
    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: #333;
    background-color: #fff;
}

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

a:hover {
    color: #2EC4B6;
}

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

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

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

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

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

.logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    color: #2EC4B6;
}

.nav {
    display: flex;
    gap: 40px;
    margin-left: 60px;
}

.nav a {
    font-size: 16px;
    color: #333;
    padding: 8px 0;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #2EC4B6;
    transition: width 0.3s ease;
}

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

.nav a:hover,
.nav a.active {
    color: #2EC4B6;
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4f5f3 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: bold;
    color: #333;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero-title span {
    color: #2EC4B6;
}

.hero-subtitle {
    font-size: 20px;
    color: #666;
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #2EC4B6 0%, #26a69a 100%);
    color: #fff;
    box-shadow: 0 4px 15px rgba(46, 196, 182, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(46, 196, 182, 0.5);
    color: #fff;
}

.btn-secondary {
    background: #fff;
    color: #2EC4B6;
    border: 2px solid #2EC4B6;
}

.btn-secondary:hover {
    background: #2EC4B6;
    color: #fff;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 400px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

/* Section Styles */
.section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: bold;
    color: #333;
    margin-bottom: 20px;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: #666;
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Features Section */
.features {
    background: #fff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feature-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #2EC4B6 0%, #26a69a 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 36px;
    color: #fff;
}

.feature-title {
    font-size: 22px;
    font-weight: bold;
    color: #333;
    margin-bottom: 16px;
}

.feature-desc {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

/* App Download Section */
.download {
    background: linear-gradient(135deg, #2EC4B6 0%, #26a69a 100%);
    color: #fff;
}

.download .section-title,
.download .section-subtitle {
    color: #fff;
}

.download-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 80px;
}

.download-info {
    text-align: left;
}

.download-info h3 {
    font-size: 28px;
    margin-bottom: 20px;
}

.download-info p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 30px;
    line-height: 1.8;
}

.download-buttons {
    display: flex;
    gap: 20px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.2);
    padding: 14px 28px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    color: #fff;
}

.download-btn-icon {
    font-size: 28px;
}

.download-btn-text {
    text-align: left;
}

.download-btn-text small {
    font-size: 12px;
    opacity: 0.8;
}

.download-btn-text span {
    display: block;
    font-size: 16px;
    font-weight: 500;
}

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

.download-qr img {
    width: 180px;
    height: 180px;
    background: #fff;
    padding: 10px;
    border-radius: 12px;
}

.download-qr p {
    margin-top: 12px;
    font-size: 14px;
    opacity: 0.9;
}

/* About Section */
.about-content {
    display: flex;
    gap: 60px;
    align-items: center;
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 28px;
    color: #333;
    margin-bottom: 20px;
}

.about-text p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-image {
    flex: 1;
    text-align: center;
}

.about-image img {
    max-width: 500px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

/* Stats Section */
.stats {
    background: #f8f9fa;
    padding: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item h3 {
    font-size: 48px;
    font-weight: bold;
    color: #2EC4B6;
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 16px;
    color: #666;
}

/* Footer */
.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-size: 24px;
    color: #2EC4B6;
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-links h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: #fff;
}

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

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

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #2EC4B6;
}

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

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 10px;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: #2EC4B6;
}

.copyright {
    margin-bottom: 8px;
}

.beian a {
    color: rgba(255, 255, 255, 0.6);
}

.beian a:hover {
    color: #2EC4B6;
}

/* Product Page Styles */
.product-hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4f5f3 100%);
    text-align: center;
}

.product-hero h1 {
    font-size: 42px;
    color: #333;
    margin-bottom: 20px;
}

.product-hero p {
    font-size: 18px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.product-features {
    padding: 100px 0;
}

.product-feature {
    display: flex;
    align-items: center;
    gap: 80px;
    margin-bottom: 100px;
}

.product-feature:nth-child(even) {
    flex-direction: row-reverse;
}

.product-feature:last-child {
    margin-bottom: 0;
}

.product-feature-content {
    flex: 1;
}

.product-feature-content h3 {
    font-size: 28px;
    color: #333;
    margin-bottom: 20px;
}

.product-feature-content p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.product-feature-content ul {
    list-style: none;
}

.product-feature-content li {
    padding: 8px 0;
    padding-left: 28px;
    position: relative;
    font-size: 15px;
    color: #555;
}

.product-feature-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #2EC4B6;
    font-weight: bold;
}

.product-feature-image {
    flex: 1;
    text-align: center;
}

.product-feature-image img {
    max-width: 450px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

/* About Page Styles */
.about-hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4f5f3 100%);
    text-align: center;
}

.about-hero h1 {
    font-size: 42px;
    color: #333;
    margin-bottom: 20px;
}

.about-hero p {
    font-size: 18px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.about-section {
    padding: 80px 0;
}

.about-section h2 {
    font-size: 32px;
    color: #333;
    margin-bottom: 30px;
    text-align: center;
}

.about-section p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto 20px;
    text-align: center;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.team-card {
    text-align: center;
}

.team-card img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.team-card h4 {
    font-size: 18px;
    color: #333;
    margin-bottom: 8px;
}

.team-card p {
    font-size: 14px;
    color: #666;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.value-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

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

.value-card h4 {
    font-size: 20px;
    color: #333;
    margin-bottom: 12px;
}

.value-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    text-align: center;
}

/* Contact Section */
.contact {
    background: #f8f9fa;
    padding: 80px 0;
}

.contact-content {
    display: flex;
    gap: 60px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    flex: 1;
}

.contact-info h3 {
    font-size: 24px;
    color: #333;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-item .icon {
    font-size: 24px;
    color: #2EC4B6;
}

.contact-item h4 {
    font-size: 16px;
    color: #333;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 14px;
    color: #666;
}

/* Responsive */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

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

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

    .download-content {
        flex-direction: column;
        gap: 40px;
    }

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

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

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

    .product-feature {
        flex-direction: column !important;
        gap: 40px;
    }

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

@media (max-width: 768px) {
    .header .container {
        height: 60px;
    }

    .logo-text {
        font-size: 20px;
    }

    .nav {
        gap: 20px;
    }

    .nav a {
        font-size: 14px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

    .section-title {
        font-size: 28px;
    }

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

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

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

    .contact-content {
        flex-direction: column;
    }
}