/* 首页banner和活动 */
.main-index-banner {
    position: relative;
    width: 100%;
    background: #fff;
}

.banner-img {
    width: 100%;
    display: block;
}

.banner-activity {
    position: absolute;
    left: 50%;
    top: 30px;
    transform: translateX(-50%);
    z-index: 2;
    width: 90%;
    max-width: 600px;
}

.activity-img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(255, 153, 0, 0.08);
}

.main-search-box {
    position: absolute;
    left: 50%;
    top: 65%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 500px;
    z-index: 3;
}

.main-search-box form {
    display: flex;
}

.main-search-input {
    width: 75%;
    padding: 12px 16px;
    border: 1px solid #eee;
    border-radius: 6px 0 0 6px;
    font-size: 1rem;
    flex-grow: 1;
    border-right: none;
}

.main-search-btn {
    width: 25%;
    padding: 12px 0;
    background: #007350;
    color: #fff;
    border: none;
    border-radius: 0 6px 6px 0;
    font-size: 1rem;
    cursor: pointer;
    flex-shrink: 0;
}

@media (max-width: 600px) {
    .main-search-box {
        top: 80%;
    }

    .banner-activity {
        top: 10px;
    }
}

/* 首页资料/书籍卡片 */
.index-section {
    margin: 32px 0;
}

.section-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 18px;
    color: #222;
}

.index-card-list {
    column-count: 5;
    column-gap: 18px;
}

.index-card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    width: 100%;
    margin-bottom: 18px;
    overflow: hidden;
    transition: box-shadow .2s;
    break-inside: avoid-column;
}

.index-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.10);
}

.index-card-imgbox {
    width: 100%;
    height: auto;
    background: #f7f7f7;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.index-card-img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.index-card-info {
    padding: 10px 12px;
}

.index-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.index-card-meta {
    font-size: 0.85rem;
    color: #888;
}

@media (max-width: 1200px) {
    .index-card-list {
        column-count: 4;
        column-gap: 15px;
    }
}

@media (max-width: 900px) {
    .index-card-list {
        column-count: 3;
        column-gap: 10px;
    }

    .index-card {
        margin-bottom: 10px;
    }

    .index-card-list {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
        column-count: auto;
        column-gap: 0;
    }

    .index-card {
        width: calc(50% - 10px);
        max-width: none;
        min-width: unset;
        margin-bottom: 10px;
        break-inside: auto;
    }

    .index-card-imgbox {
        height: 180px;
    }
}

@media (max-width: 600px) {
    .index-card-list {
        gap: 10px;
    }

    .index-card {
        width: calc(100% - 10px);
        max-width: none;
        min-width: unset;
        margin-bottom: 10px;
    }

    .index-card-imgbox {
        height: 200px;
    }

    .index-card-img {
        height: inherit;
    }
}

/* 首页导航 */
.index-nav-list {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

.index-nav-group {
    flex: 1;
    min-width: 120px;
}

.index-nav-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #1976d2;
}

.index-nav-ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.index-nav-ul li {
    display: inline-block;
}

.index-nav-ul a {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    background: #f5f5f5;
    color: #333;
    font-size: 0.95rem;
    transition: background .2s;
}

.index-nav-ul a:hover {
    background: #ffe0b2;
    color: #ff9800;
}

@media (max-width: 900px) {
    .index-nav-list {
        gap: 10px;
    }

    .index-nav-group {
        min-width: 80px;
    }
}

@media (max-width: 600px) {
    .index-nav-list {
        flex-direction: column;
        gap: 0;
    }

    .index-nav-group {
        margin-bottom: 18px;
    }
}

/* Add new navbar styles */
.main-navbar {
    background: #fff;
    border-bottom: 1px solid #eee;
    padding: 0;
}

/* Hide mobile navbar on desktop */
.main-navbar-mobile {
    display: none;
}

/* Hide the search box within the mobile navbar on desktop */
.main-navbar-mobile .main-search-box {
    display: none;
}

.navbar-container {
    display: flex;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    height: 60px;
    padding: 0 20px;
}

.navbar-left a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #333;
    font-size: 1.2rem;
    font-weight: bold;
}

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

.navbar-center .main-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 20px;
}

.navbar-center .main-nav-list li {
    display: inline-block;
}

.navbar-center .main-nav-list a {
    text-decoration: none;
    color: #555;
    font-size: 1rem;
    padding: 0 5px;
}

.navbar-center .main-nav-list a:hover {
    color: #ff9800;
}

.navbar-right a {
    text-decoration: none;
    color: #555;
    font-size: 1rem;
    margin-left: 15px;
}

.navbar-right a:hover {
    color: #ff9800;
}

/* Responsive adjustments for navbar */
@media (max-width: 768px) {

    /* Hide desktop navbar on mobile */
    .main-navbar {
        display: none;
    }

    /* Show mobile navbar on mobile */
    .main-navbar-mobile {
        display: block;
        background-color: #fff;
        padding: 10px 15px;
        margin-bottom: 15px;
    }

    /* Hide the desktop search box on mobile */
    .main-search-box {
        display: none !important;
    }

    /* Show the search box within the mobile navbar on mobile */
    .main-navbar-mobile .main-search-box {
        display: block !important;
        position: relative;
        top: auto;
        left: auto;
        transform: none;
        width: calc(100% - 30px);
        max-width: none;
        margin: 10px auto 0 auto;
        padding: 0;
    }

    .navbar-mobile-container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0;
        margin-bottom: 0;
    }

    .navbar-mobile-left a,
    .navbar-mobile-right a {
        display: flex;
        align-items: center;
        text-decoration: none;
        color: #555;
        font-size: 1rem;
    }

    .navbar-mobile-left svg,
    .navbar-mobile-right svg {
        margin-right: 5px;
        width: 20px;
        height: 20px;
    }

    .navbar-mobile-center span {
        font-size: 1.2rem;
        font-weight: bold;
        color: #007350;
    }

    /* Hide banner image on mobile */
    .banner-img {
        display: none;
    }

    .navbar-container {
        height: 50px;
    }

    .navbar-left img {
        height: 30px;
    }

    .navbar-left a span {
        display: none;
    }

    .navbar-center .main-nav-list {
        gap: 10px;
    }

    .navbar-center .main-nav-list a,
    .navbar-right a {
        font-size: 0.9rem;
    }

    .navbar-right a {
        margin-left: 10px;
    }
}

@media (max-width: 480px) {
    .main-navbar {
        padding: 0 10px;
    }

    .navbar-center {
        flex-grow: 1;
        margin: 0 10px;
    }

    .navbar-center .main-nav-list {
        flex-wrap: wrap;
        justify-content: center;
    }

    .navbar-right {
        display: none;
    }

    .navbar-left a span {
        display: inline;
        font-size: 1rem;
    }
}

/* Announcement Section Styles */
.announcement-section {
    background-color: #fff8f2;
    padding: 12px 20px;
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 5px;
    flex-wrap: wrap;
    max-width: 1000px;
    margin: 20px auto;
}

.announcement-title {
    font-weight: bold;
    color: #ff9800;
    flex-shrink: 0;
}

.announcement-list {
    display: flex;
    align-items: center;
    gap: 5px;
    flex-grow: 1;
    overflow: hidden;
    white-space: nowrap;
}

.announcement-item {
    text-decoration: none;
    color: #555;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.announcement-item:hover {
    color: #ff9800;
}

.announcement-more {
    text-decoration: none;
    color: #ff9800;
    font-size: 0.95rem;
    flex-shrink: 0;
}

/* Main Wrapper for single column */
.main-wrapper {
    max-width: 1000px;
    margin: 20px auto;
    padding: 0 20px;
}

/* Adjust section margins for single column */
.index-section {
    margin: 32px 0 0 0;
}

/* Remove obsolete two-column styles */
/* You might need to manually review and remove styles for .sub-container, .center-wrapper, .right-wrapper, .sCard, and their children if they still exist and cause issues */