/* General Body Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f8f9fa;
    color: #333;
}

/* Header and Navigation */
header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 5%;
}

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

nav .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #333;
    text-decoration: none;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}


nav ul li {
    margin-left: 2rem;
}

nav ul li a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #007bff;
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

section {
    background-color: #fff;
    margin-bottom: 2rem;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

h1, h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

/* Gallery Section */
.gallery {
    display: flex;
    flex-wrap: nowrap; /* 不换行 */
    justify-content: flex-start; /* 靠左排列 */
    gap: 0.5rem; /* 减小图片间距 */
    background-color: transparent;
    box-shadow: none;
    overflow-x: auto; /* 横向滚动 */
    -webkit-overflow-scrolling: touch; /* 移动端顺滑滚动 */
}

.gallery img {
    display: block;
    width: auto; /* 避免被拉伸，使用自身宽度 */
    max-width: 220px; /* 上限 */
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Features Section */
.features ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem; /* 稍大一些的间距，让卡片更呼吸 */
    text-align: center;
}

.features li {
    background-color: #fff; /* 卡片底色 */
    padding: 1.25rem;
    border-radius: 12px; /* 更圆润 */
    border: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 4px 12px rgba(0,0,0,0.06); /* 些许阴影 */
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.features li:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 22px rgba(0,0,0,0.10);
}

.features li strong {
    color: #222;
}

.features .highlight {
    text-align: center;
    margin-top: 2rem;
    font-size: 1.2rem;
    color: #007bff;
}

/* QR Code Section */
.qrcode {
    text-align: center;
}

.qrcode img {
    max-width: 200px;
    margin: 1rem 0;
}

/* Content Section for Tutorial/FAQ */
.content {
    background-color: transparent; /* 让内部卡片更突出 */
    box-shadow: none;
    padding: 0; /* 由卡片自身控制留白 */
}

.content h1 {
    margin-bottom: 1.5rem;
}

.content article {
    background: #fff;
    border: 1px solid rgba(0,0,0,0.06);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    padding: 1.25rem 1.25rem 1rem;
    margin-bottom: 1.25rem;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.content article:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 22px rgba(0,0,0,0.10);
}

.content article h2 {
    margin-top: 0.25rem;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
    color: #222;
}

.content article p {
    margin: 0.25rem 0 0.5rem;
    color: #444;
}

.content article ol {
    margin: 0.5rem 0 0.5rem 1.25rem;
    padding: 0;
    list-style: decimal-leading-zero; /* 更清晰的序号 */
}

.content article ol li {
    margin: 0.25rem 0;
    padding-left: 0.25rem;
}

.content article ol li::marker {
    color: #007bff; /* 序号高亮 */
    font-weight: 600;
}

.content article a {
    color: #0a58ca;
    text-decoration: none;
    border-bottom: 1px dashed rgba(10,88,202,0.35);
}

.content article a:hover {
    color: #084298;
    border-bottom-color: rgba(8,66,152,0.6);
}

.content article + article {
    margin-top: 1rem; /* 连续卡片间距 */
}

/* Footer */
footer {
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
    color: #777;
}

/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    nav {
        flex-wrap: wrap;
    }

    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        margin-top: 1rem;
    }

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

    .nav-links li {
        margin: 0.5rem 0;
        text-align: center;
    }

    /* 紧凑移动端整体留白 */
    main {
        margin: 1rem auto; /* 原为 2rem */
        padding: 0 0.5rem; /* 原为 0 1rem */
    }

    section {
        padding: 1rem; /* 原为 2rem */
    }

    /* 紧凑画廊边距与间距，贴近四周 */
    .gallery {
        padding: 0.25rem; /* 避免离边太远 */
        gap: 0.4rem; /* 稍微缩小图片间距 */
    }

    /*.gallery img {*/
    /*    max-width: 150px; !* 移动端稍微小一点 *!*/
    /*}*/
}