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

body {
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf9 100%);
    color: #333;
    line-height: 1.6;
}

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

nav {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
}

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

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo span {
    font-size: 1.5rem;
    color: #4a6cf7;
    font-weight: 600;
}

.nav-links {
    display: flex;
    gap: 28px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: #4a6cf7;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: #2c3e50;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #4a6cf7, #3b82f6);
    border-radius: 2px;
}

.section-title p {
    color: #7f8c8d;
    font-size: 1.1rem;
    max-width: 640px;
    margin: 20px auto 0;
}

.hero {
    padding: 100px 0;
    background: linear-gradient(135deg, #eef2ff 0%, #e4edf9 100%);
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3rem;
    color: #2c3e50;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.15rem;
    color: #7f8c8d;
    margin-bottom: 30px;
    max-width: 600px;
}

.download-btn {
    display: inline-block;
    background: linear-gradient(90deg, #4a6cf7, #2563eb);
    color: #fff;
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 10px 20px rgba(74, 108, 247, 0.3);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(74, 108, 247, 0.4);
}

.download-btn.secondary {
    background: #fff;
    color: #4a6cf7;
    border: 2px solid #4a6cf7;
    box-shadow: none;
    margin-left: 12px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero-mock {
    width: 100%;
    max-width: 480px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    animation: float 6s ease-in-out infinite;
}

.hero-mock-bar {
    height: 36px;
    background: linear-gradient(90deg, #4a6cf7, #2563eb);
    display: flex;
    align-items: center;
    padding: 0 14px;
    gap: 6px;
}

.hero-mock-bar i {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.55);
}

.hero-mock-body {
    padding: 24px;
    min-height: 260px;
    background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
}

.hero-mock-line {
    height: 12px;
    background: #dbe4ff;
    border-radius: 6px;
    margin-bottom: 14px;
}

.hero-mock-line.short {
    width: 55%;
}

.hero-mock-line.mid {
    width: 78%;
}

.hero-mock-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 20px;
}

.hero-mock-card {
    height: 72px;
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 4px 12px rgba(74, 108, 247, 0.12);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-18px); }
}

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

.feature-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(74, 108, 247, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #eef2ff, #dbe4ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 30px;
}

.feature-card h3 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-bottom: 12px;
}

.feature-card p {
    color: #64748b;
}

.platforms {
    background: #fff;
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 24px;
}

.platform-item {
    text-align: center;
    padding: 30px 20px;
    border-radius: 15px;
    background: #f8fafc;
    transition: transform 0.3s;
}

.platform-item:hover {
    transform: scale(1.05);
}

.platform-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.platform-item h3 {
    color: #2c3e50;
    margin-bottom: 6px;
}

.platform-item p {
    color: #7f8c8d;
    font-size: 0.95rem;
}

.testimonials {
    background: linear-gradient(135deg, #eef2ff 0%, #e4edf9 100%);
}

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

.testimonial-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.testimonial-header {
    display: flex;
    align-items: center;
    margin-bottom: 18px;
}

.testimonial-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #eef2ff;
    margin-right: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #4a6cf7;
    font-weight: bold;
}

.testimonial-info h4 {
    color: #2c3e50;
}

.testimonial-info p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.sync-services {
    background: #fff;
}

.sync-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 28px;
}

.sync-card {
    background: linear-gradient(135deg, #eef2ff, #dbe4ff);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    transition: transform 0.3s;
}

.sync-card:hover {
    transform: translateY(-5px);
}

.sync-icon {
    font-size: 42px;
    margin-bottom: 16px;
}

.sync-card h3 {
    color: #2c3e50;
    margin-bottom: 10px;
}

.sync-card p {
    color: #64748b;
}

.articles-preview {
    background: linear-gradient(135deg, #eef2ff 0%, #e4edf9 100%);
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.article-card {
    background: #fff;
    border-radius: 15px;
    padding: 28px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.article-card:hover {
    transform: translateY(-6px);
}

.article-card .tag {
    display: inline-block;
    font-size: 0.8rem;
    color: #4a6cf7;
    background: #eef2ff;
    padding: 4px 10px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.article-card h3 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.article-card h3 a {
    color: inherit;
    text-decoration: none;
}

.article-card h3 a:hover {
    color: #4a6cf7;
}

.article-card p {
    color: #64748b;
    margin-bottom: 14px;
}

.article-card .more {
    color: #4a6cf7;
    text-decoration: none;
    font-weight: 600;
}

.faq {
    background: linear-gradient(135deg, #eef2ff 0%, #e4edf9 100%);
}

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

.faq-item {
    background: #fff;
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.faq-question {
    padding: 20px;
    background: #f8fafc;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.faq-question span {
    color: #4a6cf7;
    font-size: 1.2rem;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 20px;
    color: #64748b;
}

.faq-answer.open {
    padding: 0 20px 20px;
    max-height: 600px;
}

.page-banner {
    padding: 70px 0 50px;
    background: linear-gradient(135deg, #eef2ff 0%, #e4edf9 100%);
    text-align: center;
}

.page-banner h1 {
    font-size: 2.4rem;
    color: #2c3e50;
    margin-bottom: 12px;
}

.page-banner p {
    color: #7f8c8d;
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.download-card {
    background: #fff;
    border-radius: 15px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.download-card .icon {
    font-size: 42px;
    margin-bottom: 14px;
}

.download-card h3 {
    color: #2c3e50;
    margin-bottom: 8px;
}

.download-card p {
    color: #7f8c8d;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.req-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.req-card {
    background: #fff;
    border-radius: 15px;
    padding: 28px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.req-card h3 {
    color: #2c3e50;
    margin-bottom: 14px;
}

.req-card ul {
    padding-left: 18px;
    color: #64748b;
}

.req-card li {
    margin-bottom: 8px;
}

.article-page {
    padding: 50px 0 80px;
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 36px;
}

.article-main {
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.article-meta {
    color: #94a3b8;
    font-size: 0.9rem;
    margin-bottom: 18px;
}

.article-main h1 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 20px;
    line-height: 1.35;
}

.article-main h2 {
    font-size: 1.35rem;
    color: #2c3e50;
    margin: 28px 0 12px;
}

.article-main p {
    color: #475569;
    margin-bottom: 14px;
}

.article-main ul {
    padding-left: 20px;
    color: #475569;
    margin-bottom: 16px;
}

.article-main li {
    margin-bottom: 8px;
}

.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.side-card {
    background: #fff;
    border-radius: 15px;
    padding: 24px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.side-card h3 {
    color: #2c3e50;
    margin-bottom: 14px;
    font-size: 1.1rem;
}

.side-card ul {
    list-style: none;
}

.side-card li {
    margin-bottom: 10px;
}

.side-card a {
    color: #4a6cf7;
    text-decoration: none;
}

.side-card a:hover {
    text-decoration: underline;
}

.sitemap-list {
    background: #fff;
    border-radius: 15px;
    padding: 36px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    max-width: 800px;
    margin: 0 auto;
}

.sitemap-list h2 {
    color: #2c3e50;
    margin: 24px 0 12px;
    font-size: 1.25rem;
}

.sitemap-list h2:first-child {
    margin-top: 0;
}

.sitemap-list ul {
    list-style: none;
    padding-left: 0;
}

.sitemap-list li {
    margin-bottom: 10px;
    padding: 10px 14px;
    background: #f8fafc;
    border-radius: 8px;
}

.sitemap-list a {
    color: #4a6cf7;
    text-decoration: none;
    font-weight: 500;
}

.breadcrumb {
    font-size: 0.9rem;
    color: #94a3b8;
    margin-bottom: 16px;
}

.breadcrumb a {
    color: #4a6cf7;
    text-decoration: none;
}

footer {
    background: #2c3e50;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    margin-bottom: 18px;
    font-size: 1.15rem;
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-section p {
    color: #bdc3c7;
    font-size: 0.95rem;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
    font-size: 0.9rem;
}

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

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
    }

    .nav-links.show {
        display: flex;
    }

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

    .hero-text h1 {
        font-size: 2.1rem;
    }

    .page-banner h1 {
        font-size: 1.8rem;
    }

    .section {
        padding: 60px 0;
    }

    .section-title h2 {
        font-size: 1.9rem;
    }

    .download-btn.secondary {
        margin-left: 0;
        margin-top: 12px;
    }

    .article-main {
        padding: 24px;
    }
}