/* ==============================================
   首页样式 (Index Styles)
   ============================================== */

/* ==============================================
   1. Banner 区域
   ============================================== */
.banner-section {
    position: relative;
    margin-bottom: 20px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.banner-section img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 3/1;
    object-fit: cover;
}

.banner-carousel {
    position: relative;
    overflow: hidden;
}
.banner-track {
    display: flex;
    transition: transform 0.5s ease;
    will-change: transform;
}
.banner-slide {
    min-width: 100%;
    position: relative;
}
.banner-dots {
    position: absolute;
    left: 50%;
    bottom: 16px;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}
.banner-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
}
.banner-dot.active {
    background: #fff;
}
.banner-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    background: rgba(0,0,0,0.4);
    color: #fff;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
}
.banner-btn.prev { left: 12px; }
.banner-btn.next { right: 12px; }

.banner-text {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px 30px 60px 30px; /* 预留底部空间用于dots，不遮挡 */
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    color: #fff;
}

.banner-text h2 {
    font-size: 24px;
    margin-bottom: 8px;
    font-weight: 600;
}

.banner-text p {
    font-size: 14px;
    opacity: 0.9;
}
.banner-description {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.5;
    max-height: calc(1.5em * 2);
}

@media (max-width: 768px) {
    .banner-text {
        padding: 15px;
    }
    .banner-text p {
        font-size: 12px;
        opacity: 0.9;
        margin-bottom: 20px;
    }
    .banner-text h2 {
        font-size: 18px;
    }
    .banner-section img {
        aspect-ratio: 2/1;
    }
    .banner-btn { display: none; }
    .nav-groups {
        gap: 20px;
    }

    .feed-image-box {
        width: 110px;
        height: 80px;
    }
}
/* ==============================================
   2. 探索导航 (胶囊式滑动)
   ============================================== */
.explore-nav {
    margin-bottom: 20px;
}

/* PC端隐藏 Explore Nav */
@media (min-width: 769px) {
    .hidden-desktop {
        display: none !important;
    }
}

.nav-pills-container {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding: 4px 2px 10px 2px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}

.nav-pills-container::-webkit-scrollbar {
    display: none;
}

.nav-pill {
    flex: 0 0 auto;
    padding: 6px 16px;
    font-size: 14px;
    border-radius: 20px;
    text-decoration: none;
    color: var(--color-text-main);
    background-color: #fff;
    border: 1px solid transparent;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.nav-pill.active {
    background-color: var(--color-primary);
    color: #fff;
    box-shadow: 0 4px 8px rgba(16, 172, 132, 0.3);
}

.nav-pill.outline {
    background-color: transparent;
    border-color: var(--color-border);
    box-shadow: none;
}

.nav-pill:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.nav-pill.active:hover {
    color: #fff;
    background-color: var(--color-primary-hover);
}

/* ==============================================
   3. 发现区 (Discovery Zone) - 分类导航
   ============================================== */
.discovery-zone {
    margin-bottom: 30px;
}

@media (min-width: 769px) {
    .discovery-zone {
        display: flex;
        gap: 30px;
    }

    .grade-nav-section {
        flex: 3; /* 60% approx */
    }

    .type-nav-section {
        flex: 2; /* 40% approx */
    }
}

.nav-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-main);
    margin-bottom: 12px;
    padding-left: 10px;
    border-left: 4px solid var(--color-primary);
}

/* --- 按年级 (Grade Cards) --- */
/* ===== grade-nav disabled (styles commented out) =====
.grade-nav-section {
    margin-bottom: 30px;
}
@media (min-width: 769px) {
    .grade-nav-section {
        margin-bottom: 0;
    }
}
.grade-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}
@media (min-width: 769px) {
    .grade-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
.grade-big-card {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 20px 15px;
    background-color: #eee;
    background-size: cover;
    background-position: center;
    border-radius: var(--radius-md);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: none;
    position: relative;
    overflow: hidden;
    height: 100px;
    text-align: center;
}
.grade-big-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    transition: background 0.3s;
    z-index: 1;
}
.grade-big-card:hover::before {
    background: rgba(0, 0, 0, 0.2);
}
.grade-big-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.grade-big-card .card-info {
    display: flex;
    flex-direction: column;
    z-index: 2;
}
.grade-big-card .name {
    font-weight: 600;
    font-size: 16px;
    color: #fff;
    margin-bottom: 2px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}
.grade-big-card .desc {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}
.grade-big-card.primary-grade-row,
.grade-big-card.middle-grade-row,
.grade-big-card.high-grade-row {
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
}
.grade-big-card.primary-grade-row {
    background-image: url("/static/images/posters/nav/primary.png");
}
.grade-big-card.middle-grade-row {
    background-image: url("/static/images/posters/nav/middle.png");
}
.grade-big-card.high-grade-row {
    background-image: url("/static/images/posters/nav/high.png");
}
.grade-row-full {
    grid-column: 1 / -1;
}
===== end grade-nav disabled =====*/


/* --- 按类型 (Type Cards) --- */
.type-carousel-container {
    overflow: hidden;
    position: relative;
    padding: 10px 0;
    margin: 0 -5px;
}

.type-carousel-container::before {
    left: 0;
    background: linear-gradient(to right, var(--color-bg-body), transparent);
}

.type-carousel-container::after {
    right: 0;
    background: linear-gradient(to left, var(--color-bg-body), transparent);
}

.type-carousel-track {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    padding: 0 5px;
}

.type-carousel-track::-webkit-scrollbar {
    display: none;
}

.type-card {
    flex: 0 0 auto;
    width: 100px;
    height: 120px;
	background-color: #eee;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s;
    border: none;
    position: relative;
    overflow: hidden;
    padding-bottom: 10px;
}

.type-card-inner {
	position: relative;
	width: 100%;
	height: 100%;
	display: flex;
	align-items: flex-end;
	justify-content: center;
}

.type-card .type-card-img {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
	will-change: transform;
	transform: scale(1);
	transition: transform 0.3s ease;
}

.type-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 40%, rgba(0,0,0,0.8));
    z-index: 1;
}

.type-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}
.type-card:hover .type-card-img {
	transform: scale(1.06);
}

.type-card .icon {
    font-size: 24px;
    margin-bottom: auto;
    margin-top: 20px;
    color: #fff;
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.type-card .name {
    font-size: 13px;
    color: #fff;
    font-weight: 500;
    z-index: 2;
    text-shadow: 0 1px 3px rgba(0,0,0,0.8);
}

/* PC 端优化：Type Section 改为网格布局 */
@media (min-width: 769px) {
    .type-carousel-container {
        overflow: visible;
        padding: 0;
        margin: 0;
    }

    .type-carousel-container::before,
    .type-carousel-container::after {
        display: none;
    }

    .type-carousel-track {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr)); /* 4列卡片，等宽 */
        gap: 20px; /* 加大间距更呼吸 */
        overflow: visible;
        flex-wrap: wrap;
        padding: 0;
    }

    .type-card {
        width: 100%;
        height: 120px; /* PC卡片更饱满 */
        border-radius: var(--radius-lg);
    }
}

/* ==============================================
   4. 通用标题头
   ============================================== */
.section-header,
.home-latest-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    border-left: 5px solid var(--color-primary);
    padding-left: 15px;
}

.section-header h2,
.home-latest-section-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-main);
}

.section-header .more-link,
.home-latest-section-header .home-latest-more-link {
    font-size: 13px;
    color: var(--color-text-secondary);
}

.section-header .more-link:hover,
.home-latest-section-header .home-latest-more-link:hover {
    color: var(--color-primary);
}

/* ==============================================
   5. 信息流卡片 (Feed Styles)
   ============================================== */
.composition-list-feed {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.feed-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 15px;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: background-color 0.2s;
    border-bottom: 1px solid #f0f0f0;
}

.feed-card:hover {
    background-color: #fafafa;
}

.feed-card-header {
    margin-bottom: 8px;
}

.feed-tag {
    display: inline-block;
    font-size: 12px;
    color: var(--color-primary);
    background-color: rgba(16, 172, 132, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 500;
}

.feed-card-body {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 10px;
}

.feed-text {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.feed-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-main);
    margin-bottom: 6px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.feed-summary {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.feed-image-box {
    position: relative;
    width: 100px;
    height: 75px;
    flex-shrink: 0;
    border-radius: 6px;
    overflow: hidden;
}

.feed-image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.feed-read-count {
	position: absolute;
	bottom: 4px;
	right: 4px;
	background-color: rgba(0, 0, 0, 0.6);
	color: #fff;
	font-size: 10px;
	padding: 2px 4px;
	border-radius: 4px;
	backdrop-filter: blur(2px);
	display: flex;
	align-items: center;
	line-height: 1;
}
.feed-play-btn {
	width: 22px;
	height: 22px;
	border-radius: 50%;
	background: var(--color-primary);
	color: #fff;
	border: none;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	margin-right: 6px;
	box-shadow: 0 2px 6px rgba(16,172,132,0.4);
}
.feed-play-btn:hover {
	background: var(--color-primary-hover);
}
.feed-play-btn i {
	font-size: 10px;
}

.feed-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--color-text-light);
}

.feed-source {
    color: var(--color-text-secondary);
}

.feed-stats {
    display: flex;
    gap: 12px;
}

.stat-item {
    position: relative;
}

@media (min-width: 769px) {
    .composition-list-feed {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* ==============================================
   6. 最新文章列表样式 (Latest Articles)
   ============================================== */
.home-latest-composition-list {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 10px 20px;
    box-shadow: var(--shadow-sm);
}

.home-latest-composition-list .home-latest-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px dashed var(--color-border);
}
.home-latest-composition-list .home-latest-list-item-main {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}
.home-latest-composition-list .home-latest-list-item-thumb {
    width: 48px;
    height: 48px;
    border-radius: 6px;
    object-fit: cover;
    flex-shrink: 0;
}
.home-latest-composition-list .home-latest-list-item-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.home-latest-composition-list .home-latest-list-item:last-child {
    border-bottom: none;
}

.home-latest-composition-list .home-latest-list-item-title {
    font-size: 15px;
    color: var(--color-text-main);
    display: flex;
    align-items: center;
    gap: 8px;
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}


.home-latest-composition-list .home-latest-list-item-title:hover {
    color: var(--color-primary);
}

.home-latest-composition-list .home-latest-list-item-sub {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--color-text-secondary);
}
.home-latest-composition-list .home-latest-list-item-sep {
    color: var(--color-text-light);
}
.home-latest-composition-list .home-latest-list-item-play {
    width: 24px;
    height: 24px;
    border-radius: 16px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}
.home-latest-composition-list .home-latest-list-item-play:hover {
    background: var(--color-primary-hover);
}
.home-latest-composition-list .home-latest-list-item-meta {
    font-size: 13px;
    color: var(--color-text-light);
}