/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    right: 30px;
    bottom: 80px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    z-index: 9998;
}
.mobile-nav{
    display: flex;
}

/* 手机上的样式 */
@media screen and (max-width: 768px) {
    .mobile-none {
        display: none !important;
    }
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: #3a7bc8;
    transform: translateY(-3px);
}

:root {
    --primary-color: #4a90d9;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-bg: #f8f9fa;
}


body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
.lightbox {
        display: none;
        position: fixed;
        z-index: 9999;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0,0,0,0.9);
        cursor: pointer;
    }
    .lightbox-img {
        max-width: 90%;
        max-height: 90%;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        border-radius: 5px;
        box-shadow: 0 0 20px rgba(0,0,0,0.5);
    }
    .lightbox-close {
        position: absolute;
        top: 20px;
        right: 30px;
        color: #fff;
        font-size: 40px;
        font-weight: bold;
        cursor: pointer;
        z-index: 10000;
    }
    .lightbox-close:hover {
        color: #ccc;
    }
    .screenshot-item img {
        cursor: pointer;
    }
.footer-bottom{
    text-align: center;
    color: rgba(255,255,255,0.6);
}
.lang-switch-item{
    display: flex;
    align-items: center;
    
}
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

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

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.1rem;
    border-radius: 50px;
}

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

.btn-primary:hover {
    background-color: #3a7bc8;
    border-color: #3a7bc8;
}

.btn-outline-light {
    border-width: 2px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    margin: 15px auto 0;
}

.feature-card {
    text-align: center;
    padding: 30px 20px;
    border-radius: 10px;
    background: white;
    box-shadow: 0 4px 6px rgba(0,0,0,.1);
    transition: transform 0.3s, box-shadow 0.3s;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,.15);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-card h4 {
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.feature-card p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0;
}

.features-bg {
    background-color: var(--light-bg);
}

.pricing-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: 15px;
    background: white;
    box-shadow: 0 4px 15px rgba(0,0,0,.1);
    transition: transform 0.3s;
    height: 100%;
}

.pricing-card:hover {
    transform: translateY(-10px);
}

.pricing-card.featured {
    border: 3px solid var(--primary-color);
    position: relative;
}

.pricing-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.pricing-price span {
    font-size: 1rem;
    color: #999;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 30px 0;
    text-align: left;
}

.pricing-features li {
    padding: 8px 0;
    color: #555;
}

.pricing-features li i {
    color: #27ae60;
    margin-right: 10px;
    width: 20px;
}

.pricing-features li.disabled {
    color: #ccc;
}

.pricing-features li.disabled i {
    color: #e74c3c;
}

.screenshot-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.screenshot-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,.1);
    transition: transform 0.3s;
}

.screenshot-item:hover {
    transform: scale(1.02);
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}

.faq-item {
    background: white;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,.05);
}

.faq-item h5 {
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 15px;
}

.faq-item p {
    color: #666;
    margin-bottom: 0;
    line-height: 1.6;
}

footer {
    background: var(--secondary-color);
    color: white;
    padding: 15px 0 15px;
    margin-top: -40px;
    font-size:14px;
    /* display: flex;
    align-items: center; */
}

footer h5 {
    font-weight: 600;
    margin-bottom: 20px;
}

footer a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
}

footer a:hover {
    color: white;
}

.footer-links {
    list-style: none;
    padding: 0;
}

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


.lang-switch {
    cursor: pointer;
    padding: 5px 15px;
    border: 1px solid rgba(255,255,255,0.5);
    border-radius: 20px;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.lang-switch:hover {
    background: rgba(255,255,255,0.1);
    border-color: white;
    text-decoration: none;
}

.navbar-dark .lang-switch {
    color: rgba(255,255,255,0.8);
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    .hero p {
        font-size: 1rem;
    }
    .section {
        padding: 50px 0;
    }
}

.faq-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-decoration: none;
    cursor: pointer;
}

.faq-link h5 {
    margin-bottom: 0;
    flex: 1;
}

.faq-icon {
    color: var(--primary-color);
    transition: transform 0.3s ease;
    font-size: 0.9rem;
    margin-left: 10px;
}

.faq-link:not(.collapsed) .faq-icon {
    transform: rotate(180deg);
}

.faq-link:hover {
    text-decoration: none;
}

.faq-link:not(.collapsed) h5 {
    color: var(--primary-color);
}

.faq-item .collapse p {
    padding-top: 15px;
    margin-top: 15px;
    border-top: 1px solid #eee;
}