:root {
  color-scheme: light;
  /* 品牌：深橙加深版 */
  --color-primary: #d84315;
  --color-primary-hover: #bf3a11;
  --color-accent: #e86a2b;
  --color-accent-soft: #fdf0e8;
  --color-on-primary: #ffffff;

  /* 前台底色（暖米白） */
  --color-background: #fbf7f2;
  --color-surface: #ffffff;
  --color-surface-muted: #f6efe7;
  --color-text: #1f2328;
  --color-muted-text: #6b6f76;
  --color-border: #e7ddd2;

  /* 后台底色（浅灰） */
  --color-bg-admin: #f4f5f7;
  --color-sidebar: #2b2438;
  --color-sidebar-text: #cfc8da;
  --color-sidebar-active: #ffefe7;

  /* 状态色 */
  --color-success: #2e9e63;
  --color-warning: #d9822b;
  --color-danger: #cf3a3a;
  --color-info: #3a73cf;
  --color-focus: #0b66ff;

  /* 字体 */
  --font-body: ui-sans-serif, system-ui, -apple-system, "PingFang SC",
    "Microsoft YaHei", sans-serif;
  --font-display: "Georgia", "Songti SC", ui-serif, serif;

  /* 圆角 / 间距 / 层级 */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --space-unit: 0.25rem;
  --shadow-card: 0 1px 3px rgba(216, 67, 21, 0.06),
    0 1px 2px rgba(31, 35, 40, 0.04);
  --shadow-pop: 0 8px 24px rgba(31, 35, 40, 0.12);

  --content-width: 72rem;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100dvh;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  color: var(--color-text);
}

button, input, select, textarea {
  font: inherit;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

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

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.skip-link {
  left: 1rem;
  position: fixed;
  top: 1rem;
  transform: translateY(-200%);
  z-index: 100;
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
}
.skip-link:focus {
  transform: translateY(0);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 0.5rem 1rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--color-surface);
  color: var(--color-text);
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover {
  text-decoration: none;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
}
.btn-accent {
  background: var(--color-accent);
  color: var(--color-on-primary);
}
.btn-outline {
  border-color: var(--color-border);
  background: var(--color-surface);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-danger {
  background: var(--color-danger);
  color: #fff;
}
.btn-danger:hover {
  background: #b53131;
}
.btn-ghost {
  background: transparent;
}
.btn-sm {
  padding: 0.3rem 0.7rem;
  font-size: 0.875rem;
}
.btn-block {
  width: 100%;
  justify-content: center;
}
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== 徽标 / 状态 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--color-border);
  color: var(--color-muted-text);
}
.badge-success { background: #e2f4e9; color: var(--color-success); }
.badge-warning { background: #fdeedc; color: var(--color-warning); }
.badge-danger  { background: #fbe2e2; color: var(--color-danger); }
.badge-info    { background: #e3edfc; color: var(--color-info); }
.badge-primary { background: var(--color-accent-soft); color: var(--color-primary); }
.badge-ghost   { background: var(--color-surface-muted); color: var(--color-muted-text); }

/* ===== 卡片 ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
.card-pad { padding: 1.25rem; }

.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 1.5rem 0 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.section-title::before {
  content: "";
  width: 0.3rem;
  height: 1.1rem;
  border-radius: 2px;
  background: var(--color-primary);
}

/* ===== 前台顶栏 ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(251, 247, 242, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.topbar-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  color: var(--color-text);
  font-size: 1.2rem;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand .dot {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}
.topnav {
  display: flex;
  gap: 0.25rem;
}
.topnav a {
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-md);
  color: var(--color-muted-text);
  font-weight: 600;
}
.topnav a:hover { color: var(--color-primary); text-decoration: none; }
.topnav a[aria-current="page"] {
  background: var(--color-accent-soft);
  color: var(--color-primary);
}
.topbar-search {
  flex: 1;
  max-width: 20rem;
  margin-left: auto;
  display: flex;
}
.topbar-search input {
  flex: 1;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  padding: 0.45rem 0.8rem;
  background: var(--color-surface);
}
.topbar-search button {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  padding: 0.45rem 0.85rem;
  cursor: pointer;
}
.topbar-user {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.avatar {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  overflow: hidden;
}

/* ===== 前台主体 ===== */
.main-wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 1rem 1rem 7rem;
}

/* 歌单磁贴网格 */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}
.card-tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.15s;
}
.card-tile:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-pop);
  text-decoration: none;
}
.card-tile .cover {
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.6rem;
  color: #fff;
}
.card-tile .tile-body {
  padding: 0.65rem 0.75rem;
}
.card-tile .tile-title {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--color-text);
  margin: 0 0 0.2rem;
}
.card-tile .tile-sub {
  font-size: 0.8rem;
  color: var(--color-muted-text);
  margin: 0;
}

/* 歌曲列表 */
.song-list {
  width: 100%;
  border-collapse: collapse;
}
.song-list th,
.song-list td {
  text-align: left;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
}
.song-list th {
  color: var(--color-muted-text);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.song-list tr:hover td {
  background: var(--color-accent-soft);
}
.song-cover {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  vertical-align: middle;
}
.col-num { width: 3rem; color: var(--color-muted-text); }
.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-muted-text);
  font-size: 1.1rem;
  padding: 0.25rem;
  border-radius: 50%;
}
.icon-btn:hover { color: var(--color-primary); background: var(--color-accent-soft); }

/* 底部播放器 */
.player {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 0.5rem 1rem;
  box-shadow: 0 -4px 16px rgba(31, 35, 40, 0.08);
}
.player-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.player-now {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}
.player-now .cover {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: var(--radius-sm);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.player-now .name { font-weight: 700; font-size: 0.9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.player-controls {
  flex: 1;
  max-width: 34rem;
  margin: auto;
}
.pc-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}
.pc-buttons .play {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pc-buttons .play:hover { background: var(--color-primary-hover); }
.pc-buttons button.icon-btn { font-size: 1.3rem; }
.pc-progress {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.75rem;
  color: var(--color-muted-text);
  margin-top: 0.25rem;
}
.pc-progress .bar {
  flex: 1;
  height: 0.4rem;
  border-radius: 99px;
  background: var(--color-border);
  overflow: hidden;
  cursor: pointer;
}
.pc-progress .bar > i {
  display: block;
  height: 100%;
  width: 32%;
  background: var(--color-primary);
  border-radius: 99px;
}
.player-extras {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-muted-text);
}

/* ===== 后台壳层 ===== */
.admin-layout {
  display: grid;
  grid-template-columns: 15rem 1fr;
  min-height: 100dvh;
  background: var(--color-bg-admin);
}
.admin-side {
  background: var(--color-sidebar);
  color: var(--color-sidebar-text);
  padding: 1rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.admin-side .brand {
  color: #fff;
  padding: 0.25rem 0.5rem 1rem;
}
.admin-side .brand .dot { width: 1.8rem; height: 1.8rem; font-size: 1rem; }
.side-group {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #8d86a1;
  padding: 1rem 0.5rem 0.35rem;
}
.side-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius-md);
  color: var(--color-sidebar-text);
  font-size: 0.92rem;
}
.side-link:hover { background: rgba(255,255,255,0.08); text-decoration: none; color: #fff; }
.side-link[aria-current="page"] {
  background: var(--color-sidebar-active);
  color: var(--color-primary);
  font-weight: 700;
}
.side-link .ico { width: 1.1rem; text-align: center; }
.admin-main { padding: 1.25rem 1.5rem 2rem; min-width: 0; }
.admin-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.admin-topbar h1 { margin: 0; font-size: 1.4rem; }
.crumb { color: var(--color-muted-text); font-size: 0.85rem; }

/* 后台统计卡片 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.stat-card .label { color: var(--color-muted-text); font-size: 0.85rem; }
.stat-card .value { font-size: 1.6rem; font-weight: 800; }
.stat-card .trend { font-size: 0.8rem; color: var(--color-success); }
.stat-card .trend.down { color: var(--color-danger); }

/* 后台表格 */
.table-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td {
  text-align: left;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}
.data-table th { background: var(--color-surface-muted); color: var(--color-muted-text); font-weight: 600; }
.data-table tbody tr:hover { background: var(--color-accent-soft); }
.toolbar { display: flex; gap: 0.6rem; margin-bottom: 1rem; flex-wrap: wrap; align-items: center; }
.toolbar input[type="search"], .toolbar select, .toolbar input[type="text"] {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.45rem 0.75rem;
  background: var(--color-surface);
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-item { display: flex; flex-direction: column; gap: 0.35rem; }
.form-item label { font-size: 0.85rem; font-weight: 600; }
.form-item input, .form-item select, .form-item textarea {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.75rem;
  background: var(--color-surface);
}
.form-item textarea { resize: vertical; min-height: 6rem; }

/* 分页 */
.pagination { display: flex; gap: 0.35rem; justify-content: flex-end; padding: 0.9rem 1rem; }
.pagination button {
  min-width: 2rem;
  height: 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
}
.pagination button[aria-current] {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* 响应式 */
@media (max-width: 860px) {
  .topbar-search { display: none; }
  .topnav { gap: 0; }
  .topnav a { padding: 0.4rem 0.6rem; }
  .admin-layout { grid-template-columns: 3.4rem 1fr; }
  .admin-side .brand .text, .side-link span, .side-group { display: none; }
  .side-link { justify-content: center; font-size: 1.1rem; }
  .grid-cards { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .form-grid { grid-template-columns: 1fr; }
  .player-now .name { max-width: 8rem; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}