/* ==================== AI音乐平台 - 全站核心样式 2.0 ==================== */
:root {
    --primary-color: #ff2d55;
    --bg-deep: #0b0b0d;
    --bg-surface: #121215;
    --bg-card: #1c1c21;
    --text-main: #ffffff;
    --text-dim: #999999;
    --border-color: rgba(255, 255, 255, 0.08);
    --header-height: 80px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
}

body {
    background: var(--bg-deep);
    color: var(--text-main);
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    padding-top: var(--header-height);
    padding-bottom: 100px;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none !important;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
    border-radius: inherit;
}

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

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
}

/* ==================== 轮播图 (全屏宽度) ==================== */
.banner-container {
    width: 100%;
    margin: 0;
    padding: 0;
}

.hero-banner {
    height: 420px;
    width: 100%;
    border-radius: 0;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    margin-bottom: 40px;
    border: none;
}

.hero-dark-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.1) 50%, rgba(0, 0, 0, 0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 5;
    max-width: 60%;
    padding-left: 100px;
    text-align: left;
}

.hero-title {
    font-size: 64px;
    font-weight: 900;
    color: #fff;
    margin-bottom: 15px;
    text-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
    letter-spacing: -2px;
}

.banner-dots {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: 0.3s;
}

.dot.active {
    background: var(--primary-color);
    width: 35px;
}

.banner-side-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: none;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    transition: 0.3s;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.banner-side-nav:hover {
    background: var(--primary-color);
    transform: translateY(-50%) scale(1.1);
}

.banner-side-nav.prev {
    left: 40px;
}

.banner-side-nav.next {
    right: 40px;
}

/* ==================== 标签栏 ==================== */
.tag-bar {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: -20px 0 50px;
    flex-wrap: wrap;
}

.tag-item {
    padding: 8px 22px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    color: #888;
    border: 1px solid var(--border-color);
}

.tag-item:hover {
    color: #fff;
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

/* ==================== 模块化排版 (75/25, 60/40) ==================== */
.section-row {
    display: grid;
    gap: 40px;
    margin-bottom: 60px;
}

.row-75-25 {
    grid-template-columns: 1fr 320px;
}

.row-60-40 {
    grid-template-columns: 1fr 380px;
}

.col-main {
    min-width: 0;
}

.col-side {
    display: flex;
    flex-direction: column;
}

.flex-col {
    display: flex;
    flex-direction: column;
}

.flex-1 {
    flex: 1;
}

@media (max-width: 1200px) {
    .section-row {
        grid-template-columns: 1fr !important;
    }
}

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.section-title {
    font-size: 26px;
    font-weight: 900;
    color: #fff;
    display: flex;
    align-items: center;
}

.head-tags {
    font-size: 13px;
    opacity: 0.3;
    margin-left: 20px;
    font-weight: 500;
    letter-spacing: 1px;
}

.section-more {
    font-size: 13px;
    color: var(--text-dim);
    font-weight: 600;
}

/* 精选歌单 Grid (1大 + 4小) */
.f-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    height: 500px;
}

.f-sub-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 20px;
}

.featured-item {
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    background: var(--bg-surface);
}

.featured-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 0.6s;
}

.featured-item:hover img {
    transform: scale(1.1);
}

.featured-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, transparent 60%);
    padding: 25px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.featured-name {
    font-weight: 800;
    font-size: 20px;
    color: #fff;
}

/* 榜单卡片 */
.charts-wrap {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chart-card {
    background: var(--bg-surface);
    border-radius: 16px;
    padding: 22px 25px;
    border: 1px solid var(--border-color);
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex: 1;
    display: flex;
    align-items: center;
}

.chart-card:hover {
    background: var(--bg-card);
    transform: translateX(8px);
    border-color: rgba(255, 255, 255, 0.15);
}

.chart-header {
    display: flex;
    gap: 20px;
    align-items: center;
}

.chart-tag {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 14px;
    color: #fff;
}

/* ==================== 锁定标题栏 (强制水平，绝不换行) ==================== */
.main-title {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    margin: 0;
    white-space: nowrap;
}

.title-tags {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    margin-left: 20px;
    gap: 12px;
}

.title-tag {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.4);
    padding: 3px 18px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid transparent;
    cursor: pointer;
    transition: 0.3s;
    white-space: nowrap;
}

.title-tag.active {
    color: #ff2d55;
    border: 1px solid #ff2d55 !important;
    background: rgba(255, 45, 85, 0.08);
    /* 极淡红色背景 */
}

/* ==================== 歌曲列表与图标 (暴力清除背景) ==================== */
.songs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0 40px;
}

.song-row {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 15px 20px;
    border-radius: 12px;
    cursor: pointer;
    transition: 0.2s;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}

.song-row:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateX(8px);
}

.song-row img {
    width: 65px;
    height: 65px;
    border-radius: 12px;
    object-fit: cover;
}

.song-meta {
    flex: 1;
}

.song-name {
    font-weight: 700;
    font-size: 16px;
    color: #fff;
    margin-bottom: 5px;
}

.song-artist {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.3);
}

.song-actions {
    display: flex;
    gap: 25px;
    color: rgba(255, 255, 255, 0.15);
}

/* 暴力重置按钮和图标 - 杜绝任何方框 */
.action-btn,
.action-btn i,
.action-btn:before,
.action-btn:after {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    outline: none !important;
    background-image: none !important;
    -webkit-appearance: none;
}

.action-btn {
    color: inherit !important;
    font-size: 22px !important;
    cursor: pointer;
    padding: 0 !important;
    margin: 0 !important;
    display: block !important;
    transition: 0.2s;
}

.action-btn:hover {
    color: #fff !important;
    transform: scale(1.15);
}

.song-row:hover .song-actions {
    color: rgba(255, 255, 255, 0.5);
}

/* ==================== 动态资讯卡片 (对齐右图) ==================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.news-card {
    background: var(--bg-card);
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.04);
    transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    text-decoration: none;
}

.news-card:hover {
    transform: translateY(-10px);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    background: #25252b;
}

.news-thumb {
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 0.6s;
}

.news-card:hover .news-thumb img {
    transform: scale(1.1);
}

.news-info {
    padding: 22px 25px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.news-cat {
    color: #ff2d55;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.news-title {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.5;
    color: #fff;
    height: 50px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0;
}

.news-date {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.2);
    font-weight: 500;
}

/* MV 布局 */
.mv-recom-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mv-recom-item {
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-surface);
    position: relative;
}

.mv-recom-item.featured {
    grid-column: span 2;
}

.mv-recom-item img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.mv-play-icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.1);
}

.mv-play-icon i {
    font-size: 48px;
    color: #fff;
    opacity: 0.8;
}

.featured-overlay {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, transparent 50%);
}

.mv-recom-title {
    padding: 15px 20px;
    font-size: 15px;
    font-weight: 800;
    color: #fff;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
}

.spacer-block {
    height: 120px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 16px;
    margin: 40px 0;
    border: 1px solid var(--border-color);
}
/* ==================== �ƶ�����Ӧʽ ==================== */

/* ƽ��� (1024px ����) */
@media (max-width: 1024px) {
    .hero-banner { height: 320px; }
    .hero-title { font-size: 42px; }
    .hero-content { padding-left: 60px; }
    .banner-side-nav { width: 40px; height: 40px; font-size: 16px; }
    .banner-side-nav.prev { left: 20px; }
    .banner-side-nav.next { right: 20px; }
    .f-grid { height: auto; grid-template-columns: 1fr; }
    .f-sub-grid { grid-template-columns: repeat(4, 1fr); }
    .featured-item.large { aspect-ratio: 16/9; }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .songs-grid { grid-template-columns: 1fr !important; }
}

/* �ֻ��� (768px ����) */
@media (max-width: 768px) {
    body { padding-top: 70px; padding-bottom: 120px; }
    .container { padding: 0 15px; }
    .hero-banner { height: 240px; }
    .hero-title { font-size: 28px; }
    .hero-content { padding: 0 20px; max-width: 100%; text-align: center; }
    .banner-side-nav { width: 36px; height: 36px; font-size: 14px; }
    .banner-side-nav.prev { left: 10px; }
    .banner-side-nav.next { right: 10px; }
    .banner-dots { bottom: 20px; gap: 8px; }
    .dot { width: 8px; height: 8px; }
    .dot.active { width: 24px; }
    .tag-bar { margin: 10px 0 30px; gap: 10px; overflow-x: auto; flex-wrap: nowrap; justify-content: flex-start; padding: 0 15px; -webkit-overflow-scrolling: touch; }
    .tag-item { padding: 6px 16px; font-size: 13px; flex-shrink: 0; }
    .section-row { gap: 30px; margin-bottom: 40px; }
    .section-head { margin-bottom: 20px; }
    .section-title { font-size: 20px; }
    .head-tags { display: none; }
    .f-grid { grid-template-columns: 1fr; gap: 15px; }
    .f-sub-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .featured-item.large { aspect-ratio: 16/9; }
    .featured-overlay { padding: 15px; }
    .featured-name { font-size: 16px; }
    .charts-wrap { gap: 15px; }
    .chart-card { padding: 20px; }
    .chart-icon { width: 50px; height: 50px; font-size: 20px; }
    .chart-name { font-size: 18px; }
    .songs-grid { grid-template-columns: 1fr !important; gap: 5px !important; }
    .song-row { padding: 10px !important; gap: 12px !important; }
    .song-row img { width: 50px !important; height: 50px !important; }
    .song-name { font-size: 14px !important; }
    .song-actions { gap: 15px !important; }
    .action-btn { font-size: 18px !important; }
    .news-grid { grid-template-columns: 1fr; gap: 15px; }
    .news-card { flex-direction: row; height: auto; }
    .news-thumb { width: 120px; aspect-ratio: 1/1; flex-shrink: 0; }
    .news-info { padding: 15px; gap: 8px; }
    .news-title { font-size: 14px; height: auto; }
    .mv-recom-grid { gap: 10px; }
    .mv-recom-item.featured { grid-column: span 1; }
    .spacer-block { height: 60px; margin: 20px 0; }
    .main-title { font-size: 20px !important; }
    .title-tags { display: none; }
    .section-full-title { flex-direction: column; align-items: flex-start !important; gap: 10px; }
    .playlist-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 15px !important; }
    .ad-banner-middle { margin: 20px 0 !important; height: auto !important; }
    .ad-banner-middle img { height: auto !important; }
}

/* �ֻ������� (480px ����) */
@media (max-width: 480px) {
    .hero-banner { height: 200px; }
    .hero-title { font-size: 22px; }
    .banner-side-nav { display: none; }
    .section-title { font-size: 18px; }
    .f-sub-grid { grid-template-columns: repeat(2, 1fr); }
    .chart-card { padding: 15px; }
    .chart-name { font-size: 16px; }
    .song-row img { width: 45px !important; height: 45px !important; }
    .playlist-grid { grid-template-columns: repeat(2, 1fr) !important; }
}

/* �ײ��������ƶ��� */
@media (max-width: 768px) {
    .player-bar { height: 70px !important; padding: 0 15px !important; }
    .player-info { gap: 10px !important; }
    .player-cover { width: 50px !important; height: 50px !important; }
    .player-meta .name { font-size: 13px !important; }
    .player-controls { gap: 15px !important; }
    .player-volume, .player-progress { display: none !important; }
}