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

:root {
    --primary-color: #2ecc71;
    --primary-dark: #27ae60;
    --primary-light: #82e0aa;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

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-dark);
    background-color: var(--bg-white);
}

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

.navbar {
    background-color: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

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

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

.brand-name {
    font-size: 24px;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 12px;
    border-radius: 5px;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
    background-color: rgba(46, 204, 113, 0.1);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,154.7C960,171,1056,181,1152,165.3C1248,149,1344,107,1392,85.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-size: cover;
    background-position: bottom;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.95;
}

.btn-download {
    display: inline-block;
    background-color: white;
    color: var(--primary-color);
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.features {
    padding: 80px 20px;
    background-color: var(--bg-light);
}

.features h2,
.screenshots h2 {
    text-align: center;
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 50px;
}

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

.feature-card {
    background-color: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

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

.feature-card h3 {
    color: var(--text-dark);
    margin-bottom: 15px;
    font-size: 22px;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

.screenshots {
    padding: 80px 20px;
    background-color: white;
}

.screenshot-slider {
    position: relative;
    max-width: 400px;
    margin: 0 auto;
}

.slider-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: 25px;
    box-shadow: var(--shadow-hover);
    background-color: #000;
}

.slide {
    display: none;
    animation: fadeIn 0.5s;
}

.slide.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.slide img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(46, 204, 113, 0.9);
    color: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    font-size: 22px;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.slider-btn:hover {
    background-color: var(--primary-color);
    transform: translateY(-50%) scale(1.1);
}

.slider-btn.prev {
    left: -60px;
}

.slider-btn.next {
    right: -60px;
}

.slider-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background-color: var(--primary-color);
    width: 30px;
    border-radius: 6px;
}

.cta {
    padding: 80px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
}

.cta h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.cta p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.95;
}

footer {
    background-color: var(--text-dark);
    color: white;
    padding: 50px 20px 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-section p {
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.95;
}

.back-link {
    display: inline-block;
    color: white;
    text-decoration: none;
    margin-bottom: 20px;
    font-size: 16px;
    opacity: 0.9;
    transition: var(--transition);
}

.back-link:hover {
    opacity: 1;
    transform: translateX(-5px);
}

.changelog-content,
.faq-content,
.download-content {
    padding: 60px 20px;
}

.timeline {
    position: relative;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--primary-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
}

.timeline-badge {
    position: absolute;
    left: -40px;
    background-color: var(--primary-color);
    color: white;
    padding: 8px 15px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
}

.timeline-panel {
    background-color: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.timeline-panel:hover {
    box-shadow: var(--shadow-hover);
}

.timeline-heading h3 {
    color: var(--text-dark);
    margin-bottom: 10px;
}

.timeline-heading .date {
    color: var(--text-light);
    font-size: 14px;
}

.timeline-body {
    margin-top: 20px;
}

.timeline-body h4 {
    color: var(--primary-color);
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 18px;
}

.timeline-body ul {
    padding-left: 20px;
    color: var(--text-light);
}

.timeline-body ul li {
    margin-bottom: 8px;
}

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

.faq-card {
    background-color: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.faq-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.faq-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.faq-card h3 {
    color: var(--text-dark);
    margin-bottom: 15px;
    font-size: 20px;
}

.faq-card p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.faq-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

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

.contact-section {
    background-color: var(--bg-light);
    padding: 60px 20px;
    text-align: center;
}

.contact-section h2 {
    color: var(--text-dark);
    margin-bottom: 20px;
}

.contact-section p {
    color: var(--text-light);
    margin-bottom: 30px;
}

.faq-detail {
    padding: 60px 20px;
}

.detail-content {
    max-width: 900px;
    margin: 0 auto;
    background-color: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.detail-content h2 {
    color: var(--primary-color);
    margin-top: 40px;
    margin-bottom: 20px;
    font-size: 28px;
}

.detail-content h2:first-child {
    margin-top: 0;
}

.detail-content h3 {
    color: var(--text-dark);
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 22px;
}

.detail-content h4 {
    color: var(--text-dark);
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 18px;
}

.detail-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 15px;
}

.detail-content ul,
.detail-content ol {
    padding-left: 25px;
    color: var(--text-light);
    margin-bottom: 20px;
}

.detail-content li {
    margin-bottom: 10px;
    line-height: 1.8;
}

.detail-content strong {
    color: var(--text-dark);
}

.detail-content a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.detail-content a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.detail-step,
.qa-item,
.tip-item {
    background-color: var(--bg-light);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.warning-text {
    color: #e74c3c;
    font-weight: 600;
}

.last-updated {
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.download-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background-color: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow-hover);
    margin-bottom: 40px;
}

.version-badge {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 15px;
}

.download-info h2 {
    color: var(--text-dark);
    margin-bottom: 10px;
}

.version-date {
    color: var(--text-light);
    margin-bottom: 30px;
}

.version-features h3 {
    color: var(--text-dark);
    margin-bottom: 15px;
}

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

.version-features li {
    padding: 8px 0;
    color: var(--text-light);
}

.download-action {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.download-icon {
    font-size: 80px;
    margin-bottom: 20px;
}

.download-action h3 {
    color: var(--text-dark);
    margin-bottom: 10px;
}

.download-action p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.btn-download-large {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 18px 50px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 20px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.btn-download-large:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.download-size {
    margin-top: 15px;
    font-size: 14px;
    color: var(--text-light);
}

.system-requirements {
    background-color: var(--bg-light);
    padding: 40px;
    border-radius: 15px;
    margin-bottom: 40px;
}

.system-requirements h2 {
    color: var(--primary-color);
    margin-bottom: 30px;
    text-align: center;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.requirement-item {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
}

.requirement-item h4 {
    color: var(--text-dark);
    margin-bottom: 10px;
}

.requirement-item p {
    color: var(--text-light);
}

.installation-guide {
    margin-bottom: 40px;
}

.installation-guide h2 {
    color: var(--primary-color);
    margin-bottom: 30px;
    text-align: center;
}

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

.step {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.step-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 600;
}

.step-content h4 {
    color: var(--text-dark);
    margin-bottom: 10px;
}

.step-content p {
    color: var(--text-light);
    line-height: 1.8;
}

.download-faq {
    background-color: var(--bg-light);
    padding: 40px;
    border-radius: 15px;
}

.download-faq h2 {
    color: var(--primary-color);
    margin-bottom: 30px;
    text-align: center;
}

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

.faq-item {
    background-color: white;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.faq-item h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.faq-item p {
    color: var(--text-light);
    line-height: 1.8;
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 20px 0;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        padding: 15px 0;
    }

    .mobile-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 32px;
    }

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

    .features h2,
    .screenshots h2 {
        font-size: 28px;
    }

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

    .screenshot-slider {
        max-width: 320px;
    }

    .slider-wrapper {
        border-radius: 20px;
    }

    .slider-btn {
        width: 38px;
        height: 38px;
        font-size: 18px;
    }

    .slider-btn.prev {
        left: -50px;
    }

    .slider-btn.next {
        right: -50px;
    }

    .page-header h1 {
        font-size: 32px;
    }

    .timeline {
        padding-left: 30px;
    }

    .timeline-badge {
        left: -30px;
        font-size: 12px;
        padding: 6px 10px;
    }

    .detail-content {
        padding: 20px;
    }

    .download-box {
        grid-template-columns: 1fr;
        padding: 30px 20px;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 60px 15px;
    }

    .hero h1 {
        font-size: 26px;
    }

    .btn-download {
        padding: 12px 30px;
        font-size: 16px;
    }

    .features,
    .screenshots,
    .cta {
        padding: 50px 15px;
    }

    .detail-content {
        padding: 15px;
    }

    .screenshot-slider {
        max-width: 280px;
    }

    .slider-btn.prev {
        left: 10px;
    }

    .slider-btn.next {
        right: 10px;
    }
}