/* =========================================================
 * 六线谱库 · 样式（默认浅色主题 + 首页深色主题 theme-dark）
 * ========================================================= */

:root {
  --bg: #f6f7fa;
  --bg-alt: #eef1f6;
  --surface: #ffffff;
  --surface-2: #fbfcfe;
  --header-bg: rgba(255, 255, 255, 0.92);
  --ink: #232838;
  --ink-soft: #5c6472;
  --ink-faint: #8a92a1;
  --line: #e4e7ee;
  --accent: #d96c3f;        /* 吉他木色橙 */
  --accent-deep: #b9532c;
  --accent-soft: #fdf0e9;
  --link: #b9532c;          /* 列表标题色 */
  --teal: #2f6f68;
  --teal-soft: #e8f2f1;
  --radius: 14px;
  --shadow: 0 4px 18px rgba(35, 40, 56, 0.08);
  --shadow-lg: 0 14px 44px rgba(35, 40, 56, 0.18);
}

/* ---------- 首页深色主题（仿专业谱站风格） ---------- */
body.theme-dark {
  --bg: #14161b;
  --bg-alt: #181b21;
  --surface: #1d212a;
  --surface-2: #242935;
  --header-bg: rgba(18, 20, 25, 0.92);
  --ink: #e9ebf0;
  --ink-soft: #a3aab8;
  --ink-faint: #6f7787;
  --line: #2c313c;
  --accent: #f0a84e;
  --accent-deep: #f5c34d;
  --accent-soft: rgba(240, 168, 78, 0.12);
  --link: #f0b445;          /* 金色曲名，向谱站看齐 */
  --teal: #5cc8b8;
  --teal-soft: rgba(92, 200, 184, 0.12);
  --shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 14px 44px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container { width: min(1180px, 94%); margin: 0 auto; }
.br-pc { display: inline; }
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
a { color: var(--accent-deep); }
::selection { background: var(--accent); color: #fff; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 0;
}
.logo { text-decoration: none; color: var(--ink); font-weight: 700; font-size: 1.12rem; }
.logo em { font-style: normal; font-size: 0.72rem; color: var(--ink-soft); margin-left: 8px; font-weight: 500; }
.nav a {
  color: var(--ink-soft); text-decoration: none; margin-left: 22px; font-size: 0.95rem;
  transition: color 0.15s;
}
.nav a:hover { color: var(--accent-deep); }

/* ---------- 首屏 ---------- */
.hero {
  background:
    radial-gradient(1000px 420px at 85% -10%, rgba(240, 168, 78, 0.10), transparent 60%),
    radial-gradient(800px 400px at 5% 110%, rgba(92, 200, 184, 0.08), transparent 60%),
    var(--bg);
  padding: 52px 0 40px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(1.7rem, 3.8vw, 2.6rem);
  line-height: 1.28; margin: 0 0 12px; letter-spacing: 0.5px;
}
.accent { color: var(--accent-deep); position: relative; }
.hero-sub { color: var(--ink-soft); font-size: 1.02rem; margin: 0 0 26px; }

.hero-search { position: relative; max-width: 560px; margin: 0 auto; }
.hero-search input {
  width: 100%; padding: 14px 48px 14px 20px; font-size: 1rem;
  border: 2px solid var(--line); border-radius: 999px; outline: none;
  background: var(--surface); color: var(--ink); box-shadow: var(--shadow);
  transition: border-color 0.2s;
}
.hero-search input::placeholder { color: var(--ink-faint); }
.hero-search input:focus { border-color: var(--accent); }
.search-icon { position: absolute; right: 18px; top: 50%; transform: translateY(-50%); font-size: 1.05rem; }

.hero-stats { display: flex; justify-content: center; gap: 46px; margin-top: 28px; flex-wrap: wrap; }
.stat strong { display: block; font-size: 1.5rem; color: var(--accent-deep); }
.stat span { color: var(--ink-soft); font-size: 0.88rem; }

/* ---------- 区块通用 ---------- */
.section { padding: 56px 0; }
.section-alt { background: var(--bg-alt); }
.sec-title { font-size: 1.55rem; margin: 0 0 8px; }
.sec-title::after {
  content: ""; display: block; width: 44px; height: 4px; border-radius: 2px;
  background: var(--accent); margin-top: 10px;
}
.sec-desc { color: var(--ink-soft); margin: 0 0 26px; max-width: 760px; }
.sec-desc .hint { display: block; font-size: 0.86rem; color: var(--ink-faint); }

/* ---------- 曲谱浏览区（左筛选 + 中列表 + 右排行） ---------- */
.browse-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 14px; flex-wrap: wrap; margin-bottom: 18px;
}
.browse-head h2 { margin: 0; font-size: 1.5rem; }
.browse-head .hint { color: var(--ink-faint); font-size: 0.88rem; }

.browse {
  display: grid; grid-template-columns: 208px minmax(0, 1fr) 236px;
  gap: 20px; align-items: start;
}

/* 左右侧栏面板 */
.side-panel {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 16px 12px;
}
.side-panel + .side-panel { margin-top: 16px; }
.side-title {
  margin: 0 0 8px; padding: 0 8px 8px; font-size: 0.98rem;
  border-bottom: 1px solid var(--line);
}
.side-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 7px 10px; border-radius: 8px; cursor: pointer;
  color: var(--ink-soft); font-size: 0.92rem; user-select: none;
  transition: background 0.12s, color 0.12s;
}
.side-item:hover { color: var(--link); background: var(--surface-2); }
.side-item.on { color: var(--link); background: var(--surface-2); font-weight: 700; }
.side-item .cnt { font-size: 0.78rem; color: var(--ink-faint); }

.side-rank .side-item .cnt { color: var(--ink-faint); }
.side-rank .row-idx { font-size: 0.9rem; }

/* 中间曲谱列表 */
.list-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.tab-btn {
  border: 1.5px solid var(--line); background: var(--surface); color: var(--ink-soft);
  border-radius: 999px; padding: 6px 18px; font-size: 0.92rem; cursor: pointer;
  transition: all 0.15s;
}
.tab-btn:hover { border-color: var(--accent); color: var(--link); }
.tab-btn.on { background: var(--accent); border-color: var(--accent); color: #16181d; font-weight: 700; }

.song-list { display: flex; flex-direction: column; gap: 10px; }
.song-row {
  display: grid; grid-template-columns: 36px minmax(0, 1fr) auto;
  gap: 12px; align-items: center;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px; cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
}
.song-row:hover { border-color: var(--accent); transform: translateX(2px); }
.row-idx { font-weight: 800; color: var(--link); font-size: 1.05rem; text-align: center; }
.row-title {
  margin: 0; color: var(--link); font-weight: 700; font-size: 1.02rem;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.row-sub { margin: 2px 0 0; color: var(--ink-soft); font-size: 0.85rem; }
.row-right { display: flex; align-items: center; gap: 14px; color: var(--ink-soft); font-size: 0.85rem; }
.diff { color: #e8a13c; letter-spacing: 1px; font-size: 0.85rem; }
.chip {
  display: inline-block; border-radius: 999px; padding: 2px 10px;
  font-size: 0.78rem; font-weight: 600;
}
.chip-type { background: var(--teal-soft); color: var(--teal); }
.chip-chord { background: var(--accent-soft); color: var(--accent-deep); }
.empty { color: var(--ink-soft); text-align: center; padding: 40px 0; width: 100%; }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; padding: 4px 8px; }
.tag-cloud .chip-chord { cursor: pointer; border: none; }

/* ---------- 和弦图库 ---------- */
.chord-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 14px;
}
.chord-card {
  margin: 0; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 10px 6px; box-shadow: var(--shadow);
  display: flex; justify-content: center; transition: transform 0.15s;
}
.chord-card:hover { transform: translateY(-3px); }
.chord-name { font-size: 1.15rem; font-weight: 700; fill: var(--ink); }
.chord-x { font-size: 11px; fill: var(--ink-faint); }
.chord-pos { font-size: 10px; fill: var(--ink-soft); }
.chord-dotnum { font-size: 9px; fill: #fff; font-weight: 700; }

/* ---------- 资源导航 ---------- */
.res-cat { margin-bottom: 34px; }
.sec-sub-title { font-size: 1.12rem; color: var(--teal); margin: 0 0 14px; }
.res-cards {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 18px;
}
.res-card {
  display: block; text-decoration: none; color: var(--ink);
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow);
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}
.res-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.res-head { display: flex; justify-content: space-between; align-items: center; }
.res-head h3 { margin: 0; font-size: 1.08rem; }
.res-go { color: var(--accent); font-size: 1.1rem; }
.res-card p { color: var(--ink-soft); font-size: 0.9rem; margin: 8px 0 10px; }
.res-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.res-tags span {
  background: var(--teal-soft); color: var(--teal); border-radius: 999px;
  padding: 2px 10px; font-size: 0.75rem; font-weight: 600;
}

/* ---------- 关于 ---------- */
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px; }
.about-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
}
.about-card h3 { margin: 0 0 10px; font-size: 1.02rem; }
.about-card p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line); background: var(--surface);
  padding: 30px 0; text-align: center;
}
.site-footer p { margin: 4px 0; }
.foot-note { color: var(--ink-faint); font-size: 0.84rem; }

/* ---------- 弹窗 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 100; display: none;
  background: rgba(10, 12, 16, 0.6); backdrop-filter: blur(4px);
  padding: 4vh 4vw; overflow-y: auto;
}
.modal.show { display: flex; align-items: flex-start; justify-content: center; }
.modal-box {
  position: relative; background: var(--surface); border: 1px solid var(--line);
  border-radius: 18px;
  width: min(980px, 100%); padding: 34px 34px 28px; box-shadow: var(--shadow-lg);
}
.modal-close {
  position: absolute; top: 16px; right: 16px; width: 38px; height: 38px;
  border-radius: 50%; border: 1.5px solid var(--line); background: var(--surface-2);
  font-size: 1rem; cursor: pointer; color: var(--ink-soft);
}
.modal-close:hover { border-color: var(--accent); color: var(--accent-deep); }
.modal-box h2 { margin: 0 0 4px; }
.m-sub { color: var(--ink-soft); margin: 0 0 12px; font-size: 0.92rem; }
.m-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.m-desc { color: var(--ink-soft); font-size: 0.94rem; margin: 0 0 10px; }
.chordline {
  background: var(--accent-soft); border-radius: 10px; padding: 10px 16px;
  font-size: 0.92rem; color: var(--accent-deep); margin-bottom: 12px;
}
.player-bar { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin: 8px 0 4px; }
.btn {
  border: none; border-radius: 10px; padding: 10px 20px; font-size: 0.95rem;
  cursor: pointer; font-weight: 600;
}
.btn-primary { background: var(--accent); color: #16181d; transition: filter 0.15s; }
.btn-primary:hover { filter: brightness(1.08); }
.tab-scroll {
  overflow-x: auto; border: 1px solid var(--line); border-radius: 12px;
  background: var(--surface-2); padding: 10px 6px; margin-top: 12px;
}
.tab-word { font-weight: 800; font-size: 13px; fill: var(--ink-soft); }
.tab-chord { font-weight: 700; font-size: 15px; fill: var(--teal); }
.tab-barnum { font-size: 11px; fill: var(--ink-faint); }
.tab-fret { font-size: 11px; font-weight: 700; fill: var(--ink); }
.tabnote.active circle { fill: var(--accent); }
.tabnote.active text { fill: #16181d; }
.tabstem.active line { stroke: var(--accent-deep); }

.chord-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 6px; }
.chord-row h4, #mChords h4 { margin: 16px 0 4px; font-size: 0.98rem; }
.mini-chord {
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 12px; padding: 8px 6px 2px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .browse { grid-template-columns: 1fr; }
  .side-panel { display: flow-root; }
  .browse-side-l, .browse-side-r { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .browse-side-l .side-panel + .side-panel,
  .browse-side-r .side-panel + .side-panel { margin-top: 0; }
}
@media (max-width: 640px) {
  .br-pc { display: none; }
  .nav a { margin-left: 12px; font-size: 0.88rem; }
  .hero { padding: 44px 0 36px; }
  .section { padding: 44px 0; }
  .modal-box { padding: 26px 18px 22px; }
  .hero-stats { gap: 28px; }
  .about-grid { grid-template-columns: 1fr; }
  .browse-side-l, .browse-side-r { grid-template-columns: 1fr; }
  .song-row { grid-template-columns: 28px minmax(0, 1fr); }
  .row-right { grid-column: 2; }
}

/* =========================================================
 * 曲目详情页（song/*.html）
 * ========================================================= */
.detail-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; padding-top: 24px; padding-bottom: 48px; }
.detail-main { min-width: 0; display: flex; flex-direction: column; gap: 20px; }
.detail-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 24px 26px; }
.detail-card h1 { font-size: 1.55rem; margin: 4px 0 12px; color: var(--link); line-height: 1.35; }
.detail-card h1 small { display: block; font-size: 0.9rem; font-weight: 400; color: var(--ink-faint); margin-top: 6px; }
.crumbs { font-size: 0.85rem; color: var(--ink-faint); margin-bottom: 4px; }
.crumbs a { color: var(--ink-faint); }
.crumbs a:hover { color: var(--link); }
.meta-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 16px; }
.tab-box { background: #0f1116; border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
.tab-scroll { overflow-x: auto; }
.play-bar { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 16px; }
.speed-chips { display: flex; gap: 8px; }
.detail-card p { color: var(--ink-soft); line-height: 1.85; margin: 10px 0; }
.detail-card p strong { color: var(--link); }
.muted { color: var(--ink-faint); font-size: 0.88rem; }
.side-title { font-size: 1rem; padding-left: 10px; border-left: 3px solid var(--link); margin-bottom: 12px; }
.rank-list { list-style: none; counter-reset: rk; }
.rank-list li { border-bottom: 1px dashed var(--line); }
.rank-list li:last-child { border-bottom: 0; }
.rank-list a { display: flex; align-items: baseline; gap: 8px; padding: 9px 2px; color: var(--ink-soft); font-size: 0.88rem; }
.rank-list a:hover { color: var(--link); }
.rank-list .rk { color: var(--link); font-weight: 700; min-width: 20px; }
.rank-list li.on a { color: var(--link); }
.detail-card.promo { background: linear-gradient(160deg, rgba(212,167,84,.12), var(--surface)); }
.detail-card.promo p { font-size: 0.88rem; }
.rel-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.rel-card { display: flex; flex-direction: column; gap: 6px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; transition: border-color .15s; }
.rel-card:hover { border-color: var(--link); }
.rel-card strong { color: var(--ink); font-size: 0.95rem; }
.rel-card em { font-style: normal; color: var(--ink-faint); font-size: 0.8rem; }
.mini-name { display: block; text-align: center; font-size: 0.85rem; color: var(--link); margin-bottom: 2px; }
.site-footer { border-top: 1px solid var(--line); padding: 26px 0; margin-top: 40px; color: var(--ink-faint); font-size: 0.85rem; text-align: center; }
.site-footer a { color: var(--ink-faint); text-decoration: underline; }
@media (max-width: 900px) {
  .detail-wrap { grid-template-columns: 1fr; }
}


/* 完整编配版新增：段落标记 + 歌词行 */
.tab-sec { font-size: 15px; font-weight: 700; fill: #e0a23f; }
.tab-ly { font-size: 13px; fill: #9aa2ae; }

/* 弹唱谱：× 记号 + 简谱行 */
.tab-xmark { font-size: 11px; font-weight: 700; fill: #98a0ac; }
.tab-num { font-size: 13px; fill: #c8cdd6; }

/* 多行弹唱谱（accomp v2） */
.ac-head { font-size: 13px; fill: #9aa2ae; }
.ac-barnum { font-size: 10px; fill: #6f7683; }
.ac-num { font-size: 15px; font-weight: 600; fill: #d5dae2; }
.ac-ly { font-size: 13px; fill: #9aa2ae; }