/* 星童声 · 声乐 演示版课程系统
   样子照 course.zfldw.art 发声曲库：米色纸底 + 点阵，粗黑描边、硬投影，荧光绿 / 蓝 / 红 / 橙 / 黄几种亮色，黑胶唱片当装饰。
   拉丁字母和数字用 Archivo Black（从发声曲库拿的子集），中文标题用思源黑体 Heavy 子集。
   一级（首页）：四大板块横向手风琴，一屏放下；二级（板块页）：一屏彩色方块；三级（课程页）：样课 + 目录（大师课课表、热身 / 气息曲库、发声曲 / 歌曲曲库内嵌）。 */
@font-face { font-family: 'DISP'; src: url('font/display.woff2?v=202610271742') format('woff2'); font-display: swap; }
@font-face { font-family: 'SYH'; src: url('font/syh.woff2?v=202610271742') format('woff2'); font-weight: 900; font-display: swap; }
:root {
  --paper: #f7f2e6; --paper2: #efe8d6; --ink: #161616; --grey: #5f5a4e;
  --lime: #c5f22e; --blue: #3d5cff; --red: #ff4a3a; --orange: #ff9d2b; --yellow: #ffd83a; --pink: #ff8fc8; --violet: #8f74ff; --mint: #3fd99a;
  --fh: 'DISP', 'SYH', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --r: 22px; --bw: 3px; --sh: 6px 6px 0 var(--ink);
  --ease: cubic-bezier(.2, .8, .2, 1);
  --sec: var(--lime); --sec-ink: var(--ink);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0; color: var(--ink); background: var(--paper);
  font: 15px/1.65 -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.lock { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; padding: 0; }
button, a, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 8px; }
h1, h2, h3, h4, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }

.bg { position: fixed; inset: 0; z-index: -1; pointer-events: none; background: var(--paper); }
.bg::after { content: ''; position: absolute; inset: 0; background-image: radial-gradient(rgba(22, 22, 22, .09) 1.2px, transparent 1.5px); background-size: 22px 22px; }

.wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 24px; }

/* 贴纸：描边 + 硬投影，按下去收回 */
.stk { background: #fff; border: var(--bw) solid var(--ink); border-radius: var(--r); box-shadow: var(--sh); }
.press { transition: transform .2s var(--ease), box-shadow .2s var(--ease); }
.press:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--ink); }
.press:active { transform: translate(4px, 4px); box-shadow: 2px 2px 0 var(--ink); }

/* ---------- 黑胶唱片：纹路是一圈圈的，只转中间的贴纸，反光不动 ---------- */
.vinyl { position: relative; display: block; aspect-ratio: 1; border-radius: 50%; flex-shrink: 0;
  background: radial-gradient(circle, transparent 0 32.5%, #0b0b0b 33% 35.5%, transparent 36%), repeating-radial-gradient(circle, #1a1a1a 0 1.5px, #2b2b2b 1.5px 3px);
  box-shadow: 0 0 0 var(--bw) var(--ink); }
.vinyl::before { content: ''; position: absolute; inset: 0; z-index: 1; border-radius: 50%; pointer-events: none;
  background: conic-gradient(from 25deg, transparent 0 7%, rgba(255, 255, 255, .2) 11%, transparent 17% 50%, rgba(255, 255, 255, .13) 57%, transparent 64%); }
.vinyl .vl { position: absolute; inset: 33%; z-index: 0; border-radius: 50%; background: var(--lc); overflow: hidden; display: flex; align-items: center; justify-content: center; color: var(--ink); }
.vinyl .vl img { width: 100%; height: 100%; object-fit: cover; }
.vinyl .vl::after { content: ''; position: absolute; left: 50%; top: 50%; width: 14%; height: 14%; transform: translate(-50%, -50%); border-radius: 50%; background: var(--paper); box-shadow: 0 0 0 2px #0b0b0b; }
.vinyl .vl b { font-family: var(--fh); font-size: 15px; line-height: 1; transform: translateY(-58%); }
.vinyl.spin .vl { animation: spin 6s linear infinite; }

/* ---------- 动效 ---------- */
@keyframes pageIn { from { opacity: 0; transform: translateY(16px); } }
@keyframes tileIn { from { opacity: 0; transform: translateY(26px) scale(.94); } }
@keyframes itemIn { from { opacity: 0; transform: translateY(12px); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes marq { to { transform: translateX(-50%); } }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px rgba(197, 242, 46, .45); } }
@keyframes fadeIn { from { opacity: 0; } }
@keyframes bob { to { transform: translateY(-8px) rotate(-2deg); } }
.page { animation: pageIn .55s var(--ease) backwards; }
.l1.page, .l2.page { animation-name: fadeIn; animation-duration: .4s; }

/* 换页：一块颜色从点的地方铺开，盖住时换页，再淡掉 */
.warp { position: fixed; inset: 0; z-index: 95; pointer-events: none; visibility: hidden; background: var(--wc, var(--ink)); clip-path: circle(0 at var(--x, 50%) var(--y, 50%)); display: flex; align-items: center; justify-content: center; }
.warp::after { content: ''; position: absolute; inset: 0; background-image: radial-gradient(rgba(22, 22, 22, .14) 1.3px, transparent 1.6px); background-size: 22px 22px; }
.warp .vinyl { width: min(34vmin, 260px); --lc: var(--wk); animation: spin 1.1s linear infinite; opacity: 0; transform: scale(.6); }
.warp .vinyl .vl { --lc: var(--wc); }
.warp.in { visibility: visible; clip-path: circle(150vmax at var(--x, 50%) var(--y, 50%)); transition: clip-path .46s cubic-bezier(.75, 0, .25, 1); }
.warp.in .vinyl { opacity: 1; transform: scale(1); transition: opacity .25s .15s, transform .4s var(--ease) .1s; }
.warp.in.out { opacity: 0; transition: opacity .48s ease; }

/* ---------- 通用 ---------- */
.h2 { display: flex; align-items: baseline; flex-wrap: wrap; gap: 6px 14px; margin: 48px 0 18px; }
.h2 h2 { font-family: var(--fh); font-size: 27px; line-height: 1.2; position: relative; padding-left: 40px; }
.h2 h2::before { content: ''; position: absolute; left: 0; top: 50%; width: 28px; height: 28px; margin-top: -14px; border-radius: 50%; border: var(--bw) solid var(--ink);
  background: radial-gradient(circle, var(--paper) 0 13%, var(--ink) 15% 20%, var(--cc, var(--sec)) 22% 44%, var(--ink) 46%); }
.h2 p { font-size: 14px; color: var(--grey); }
.chip { display: inline-flex; align-items: center; height: 28px; padding: 0 12px; border-radius: 14px; border: 2.5px solid var(--ink); background: #fff; font-size: 13px; font-weight: 800; white-space: nowrap; }
.chip.dark { background: var(--ink); color: #fff; }
.chip.sec { background: var(--cc, var(--sec)); color: var(--ck, var(--sec-ink)); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 48px; padding: 0 24px; border-radius: 24px; border: var(--bw) solid var(--ink); background: #fff; color: var(--ink); font-weight: 800; font-size: 16px; box-shadow: 4px 4px 0 var(--ink); white-space: nowrap; }
.btn.play { background: var(--lime); }
.btn.dark { background: var(--ink); color: #fff; }
.btn svg { width: 18px; height: 18px; }
.btn > svg { transition: transform .3s var(--ease); }
.btn:hover > svg { transform: translateX(3px); }
.ico-play { display: inline-flex; width: 24px; height: 24px; border-radius: 50%; background: var(--ink); color: var(--lime); align-items: center; justify-content: center; flex-shrink: 0; }
.ico-play svg { width: 10px; height: 10px; margin-left: 2px; }
.bigplay { position: absolute; left: 50%; top: 50%; width: 76px; height: 76px; margin: -38px 0 0 -38px; border-radius: 50%; background: var(--lime); border: 4px solid var(--ink); box-shadow: 4px 4px 0 var(--ink); display: flex; align-items: center; justify-content: center; transition: transform .3s var(--ease); }
.bigplay svg { width: 26px; height: 26px; margin-left: 5px; }
.bigplay.sm { width: 46px; height: 46px; margin: -23px 0 0 -23px; border-width: 3px; box-shadow: 3px 3px 0 var(--ink); }
.bigplay.sm svg { width: 15px; height: 15px; margin-left: 3px; }
.cv:hover .bigplay { transform: scale(1.1) rotate(-8deg); }

/* ---------- 顶栏 ---------- */
.bar { position: relative; z-index: 30; flex-shrink: 0; }
.bar.solid { position: sticky; top: 0; background: rgba(247, 242, 230, .9); -webkit-backdrop-filter: blur(14px) saturate(1.4); backdrop-filter: blur(14px) saturate(1.4); border-bottom: var(--bw) solid var(--ink); }
.bar-in { display: flex; align-items: center; gap: 14px; height: 70px; width: 100%; max-width: 1440px; margin: 0 auto; padding: 0 24px; }
.bar.solid .bar-in { max-width: 1240px; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand img { width: 46px; height: auto; }
.brand .sys { display: flex; flex-direction: column; line-height: 1.25; padding-left: 12px; border-left: 2.5px solid var(--ink); }
.brand .sys b { font-family: var(--fh); font-size: 17px; }
.brand .sys i { font-style: normal; font-size: 12px; }
.brand.sm { gap: 10px; }
.brand.sm img { width: 40px; }
.brand.sm .sys { display: none; }
.bar-hint { margin-left: auto; display: inline-flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 700; color: var(--grey); letter-spacing: .5px; white-space: nowrap; }
.bar-hint i { width: 9px; height: 9px; border-radius: 50%; background: var(--ink); box-shadow: 0 0 0 4px var(--lime); animation: pulse 1.8s ease-in-out infinite; }
.back { display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 17px 0 5px; border-radius: 22px; border: var(--bw) solid var(--ink); background: #fff; box-shadow: 3px 3px 0 var(--ink); font-weight: 800; font-size: 14.5px; white-space: nowrap; flex-shrink: 0; transition: transform .2s var(--ease), box-shadow .2s var(--ease); }
.back svg { width: 30px; height: 30px; padding: 6px; border-radius: 50%; background: var(--ink); color: var(--lime); transform: rotate(180deg); transition: transform .3s var(--ease); }
.back:hover { transform: translate(-1px, -2px); box-shadow: 4px 5px 0 var(--ink); }
.back:hover svg { transform: rotate(180deg) translateX(3px); }
.back:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
.back span { max-width: 12em; overflow: hidden; text-overflow: ellipsis; }
.sw { margin-left: auto; display: flex; gap: 4px; padding: 4px; border-radius: 26px; background: #fff; border: var(--bw) solid var(--ink); box-shadow: 3px 3px 0 var(--ink); }
.sw a { height: 34px; padding: 0 14px 0 10px; display: inline-flex; align-items: center; gap: 7px; border-radius: 17px; font-weight: 800; font-size: 13.5px; white-space: nowrap; transition: background .25s, color .25s; }
.sw a i { width: 13px; height: 13px; border-radius: 50%; background: radial-gradient(circle, var(--paper) 0 18%, var(--ink) 22% 30%, var(--c) 34%); border: 2px solid var(--ink); flex-shrink: 0; }
.sw a:hover { background: var(--paper2); }
.sw a.on { background: var(--c); color: var(--k); }
.sw a.on i { animation: spin 2.5s linear infinite; }
.bar-tt { flex: 1; min-width: 0; font-family: var(--fh); font-size: 18px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar.solid .brand { margin-left: auto; }

/* ---------- 一级：四大板块手风琴 ---------- */
.l1, .l2 { display: flex; flex-direction: column; min-height: 100vh; min-height: 100svh; overflow: hidden; overflow: clip; }
@media (min-width: 901px) and (min-height: 620px) {
  .l1, .l2 { height: 100vh; height: 100svh; }
  .acc, .bento { min-height: 0; }
}
.l1-in { flex: 1; display: flex; flex-direction: column; width: 100%; max-width: 1440px; margin: 0 auto; padding: 0 24px 22px; min-height: 0; }
.l1-head { display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 12px 28px; padding: 0 0 18px; }
.kick { display: block; font-family: var(--fh); font-size: 12px; letter-spacing: 3px; color: var(--grey); margin-bottom: 4px; }
.l1-head h1 { font-family: var(--fh); font-size: clamp(30px, 3vw, 42px); line-height: 1.12; letter-spacing: .5px; }
.l1-head h1 em { font-style: normal; background: linear-gradient(transparent 56%, var(--lime) 56%, var(--lime) 92%, transparent 92%); }
.l1-stats { display: flex; border: var(--bw) solid var(--ink); border-radius: 18px; background: #fff; box-shadow: 4px 4px 0 var(--ink); overflow: hidden; }
.l1-stats span { display: flex; align-items: baseline; gap: 6px; padding: 8px 18px; font-size: 12.5px; font-weight: 700; color: var(--grey); white-space: nowrap; }
.l1-stats span + span { border-left: 2px dashed rgba(22, 22, 22, .2); }
.l1-stats b { font-family: var(--fh); font-size: 23px; color: var(--ink); }

/* --n 条数（页面上写），--g 展开那条占几份；--ew 是展开那条的宽，内容按这个宽排，收起时不跟着挤 */
.acc { --n: 4; --g: 7; --gap: 14px; --ew: calc((min(100vw, 1440px) - 48px - (var(--n) - 1) * var(--gap)) * var(--g) / (var(--g) + var(--n) - 1) - 6px); flex: 1; min-height: 440px; display: flex; gap: var(--gap); }
.pn { position: relative; flex: 1 1 0; min-width: 0; border-radius: 30px; border: var(--bw) solid var(--ink); box-shadow: var(--sh); background: var(--c); color: var(--k); overflow: hidden; isolation: isolate; cursor: pointer;
  transition: flex-grow .75s cubic-bezier(.22, .9, .24, 1), transform .3s var(--ease), box-shadow .3s var(--ease);
  animation: tileIn .7s var(--ease) backwards; animation-delay: calc(var(--i) * 70ms + 80ms); }
.pn.on { flex-grow: var(--g); cursor: default; }
.pn::before { content: ''; position: absolute; inset: 0; z-index: -1; opacity: .5; background-image: radial-gradient(rgba(22, 22, 22, .22) 1.2px, transparent 1.6px); background-size: 18px 18px; }
.pn.dark::before { background-image: radial-gradient(rgba(255, 255, 255, .22) 1.2px, transparent 1.6px); }
.pn::after { content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none; background: linear-gradient(160deg, rgba(255, 255, 255, .38), transparent 40%); }
.pn.dark::after { background: linear-gradient(160deg, rgba(255, 255, 255, .14), transparent 40%); }
.pn:not(.on):hover { transform: translateY(-6px); box-shadow: 6px 12px 0 var(--ink); }

/* 收起时：竖排板块名，底下露半张唱片 */
.pn-head { position: absolute; inset: 0; z-index: 3; width: 100%; display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 24px 8px 92px; text-align: center; color: inherit; transition: opacity .35s var(--ease) .1s, visibility 0s; }
.pn.on .pn-head { opacity: 0; visibility: hidden; transition: opacity .15s, visibility 0s .15s; }
.pn-no { font-family: var(--fh); font-size: 18px; line-height: 1; padding: 7px 10px; border-radius: 12px; background: var(--ink); color: var(--c); }
.pn-v { writing-mode: vertical-rl; text-orientation: upright; font-family: var(--fh); font-weight: 900; font-size: 32px; letter-spacing: 6px; line-height: 1; white-space: nowrap; }
.pn-en { writing-mode: vertical-rl; font-family: var(--fh); font-size: 11px; letter-spacing: 3px; opacity: .6; white-space: nowrap; }
.pn-n { margin-top: auto; font-size: 12.5px; font-weight: 800; opacity: .85; white-space: nowrap; }
.pn-ic { flex-shrink: 0; width: 46px; height: 46px; border-radius: 50%; border: var(--bw) solid var(--ink); background: #fff; color: var(--ink); display: flex; align-items: center; justify-content: center; box-shadow: 2px 2px 0 var(--ink); transition: transform .4s var(--ease), background .25s; }
.pn-ic svg { width: 20px; height: 20px; }
.pn-ic .ia { display: none; }
.pn:hover .pn-ic { transform: rotate(90deg); background: var(--lime); }
.pn-peek { position: absolute; left: 50%; bottom: -76px; width: 150px; margin-left: -75px; transition: transform .6s var(--ease); }
.pn-peek .vl b { color: var(--k); }
.pn:not(.on):hover .pn-peek { transform: translateY(-14px) rotate(-90deg); }

/* 展开后：板块介绍 + 唱片封套，唱片从封套里滑出来转 */
.pn-bw { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .25s, visibility 0s .25s; }
.pn.on .pn-bw { opacity: 1; visibility: visible; transition: opacity .45s .18s, visibility 0s; }
.pn-body { position: absolute; left: 0; top: 0; bottom: 0; width: var(--ew); }
.pn-in { position: relative; height: 100%; display: flex; flex-direction: column; align-items: flex-start; padding: 30px 36px 32px; }
.pn-in > :not(.pn-deco) { position: relative; z-index: 2; opacity: 0; transform: translateY(16px); transition: opacity .3s, transform .3s; }
.pn.on .pn-in > :not(.pn-deco) { opacity: 1; transform: none; transition: opacity .55s var(--ease), transform .7s var(--ease); }
.pn.on .pn-k { transition-delay: .16s; }
.pn.on .pn-t { transition-delay: .21s; }
.pn.on .pn-lead { transition-delay: .26s; }
.pn.on .pn-subs { transition-delay: .31s; }
.pn.on .pn-nums { transition-delay: .36s; }
.pn.on .pn-acts { transition-delay: .41s; }
.pn-k { display: flex; align-items: center; gap: 12px; font-family: var(--fh); font-size: 12px; letter-spacing: 2.5px; }
.pn-k .chip { letter-spacing: .5px; font-family: inherit; }
.dark .pn-k .chip.dark { background: #fff; color: var(--ink); }
.pn-t { font-family: var(--fh); font-size: clamp(46px, 4.4vw, 66px); line-height: 1.08; margin: 12px 0 14px; letter-spacing: 1px; }
.pn-lead { max-width: 52%; font-size: 16px; line-height: 1.75; font-weight: 600; opacity: .9; }
.pn-subs { display: flex; flex-wrap: wrap; gap: 7px; max-width: 54%; margin-top: 18px; }
.pn-subs a { font-size: 13px; font-weight: 800; padding: 3px 12px; border-radius: 14px; background: rgba(255, 255, 255, .9); color: var(--ink); border: 2.5px solid var(--ink); transition: background .2s, color .2s, transform .2s var(--ease); }
.pn-subs a:hover { background: var(--ink); color: #fff; transform: translateY(-2px); }
.pn-nums { display: flex; margin-top: 20px; }
.pn-nums span { display: flex; flex-direction: column; padding: 0 20px; font-size: 12px; font-weight: 700; line-height: 1.3; border-left: 2.5px solid rgba(22, 22, 22, .25); }
.dark .pn-nums span { border-color: rgba(255, 255, 255, .3); }
.pn-nums span:first-child { padding-left: 0; border-left: 0; }
.pn-nums b { font-family: var(--fh); font-size: 32px; line-height: 1.15; }
.pn-acts { margin-top: auto; padding-top: 18px; display: flex; flex-wrap: wrap; gap: 12px; }
.dark .pn-acts .btn.dark { background: #fff; color: var(--ink); }
.pn-deco { position: absolute; top: 0; right: 0; bottom: 0; width: 46%; z-index: 1; pointer-events: none; opacity: 0; transition: opacity .3s; }
.pn.on .pn-deco { opacity: 1; transition: opacity .5s .2s; }
.pn-wm { position: absolute; right: 22px; top: 6px; font-family: var(--fh); font-size: 170px; line-height: 1; color: transparent; -webkit-text-stroke: 2.5px rgba(22, 22, 22, .22); letter-spacing: -4px; }
.dark .pn-wm { -webkit-text-stroke-color: rgba(255, 255, 255, .28); }
.pn-rec { position: absolute; right: 30%; top: 54%; width: min(62%, 52vh, 330px); aspect-ratio: 1; transform: translateY(-50%) rotate(-5deg) translateX(30px); transition: transform .9s var(--ease); }
.pn.on .pn-rec { transform: translateY(-50%) rotate(-5deg); }
.pn-rec .vinyl { position: absolute; inset: 3%; transition: transform 1s var(--ease) .25s; }
.pn.on .pn-rec .vinyl { transform: translateX(46%) rotate(5deg); }
.pn:not(.on) .vinyl.spin .vl { animation-play-state: paused; }
.sleeve { position: absolute; inset: 0; z-index: 2; border-radius: 10px; border: var(--bw) solid var(--ink); box-shadow: 7px 7px 0 var(--ink); overflow: hidden; background: var(--ink); }
.sleeve img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 22%; }
.sleeve em { position: absolute; left: 10px; right: 10px; bottom: 10px; font-style: normal; font-family: var(--fh); font-size: 13px; letter-spacing: 1.5px; color: var(--ink); background: var(--c); border: 2px solid var(--ink); border-radius: 8px; padding: 3px 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* 底部滚动的全部课程名 */
.marq { flex-shrink: 0; display: flex; align-items: center; height: 48px; overflow: hidden; background: var(--ink); color: #fff; border-top: var(--bw) solid var(--ink); -webkit-mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent); mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent); }
.marq-in { display: flex; width: max-content; animation: marq 70s linear infinite; }
.marq-in .dup { display: flex; }
.marq:hover .marq-in { animation-play-state: paused; }
.marq a { display: inline-flex; align-items: center; gap: 10px; padding: 0 20px; font-family: var(--fh); font-size: 15px; letter-spacing: 1px; white-space: nowrap; transition: color .2s; }
.marq a:hover { color: var(--lime); }
.marq a i { width: 13px; height: 13px; border-radius: 50%; border: 2px solid #fff; }
.marq a::after { content: '\25CF'; margin-left: 20px; color: var(--lime); font-family: sans-serif; font-size: 9px; }

/* ---------- 二级：一屏彩色方块 ---------- */
.bento { flex: 1; width: 100%; max-width: 1440px; margin: 0 auto; padding: 2px 24px 24px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; grid-auto-flow: dense; }
.bento.r2 { grid-template-rows: repeat(2, minmax(250px, 1fr)); }
.bento.r3 { grid-template-rows: repeat(3, minmax(190px, 1fr)); }

.bt-title { grid-column: span 2; position: relative; display: flex; flex-direction: column; align-items: flex-start; min-width: 0; padding: 22px 28px 24px; border-radius: 26px; border: var(--bw) solid var(--ink); box-shadow: var(--sh); background: var(--ink); color: #fff; overflow: hidden; isolation: isolate;
  animation: tileIn .65s var(--ease) backwards; animation-delay: 60ms; }
.tall .bt-title { grid-row: span 2; padding: 30px 34px 32px; }
.bt-title::after { content: ''; position: absolute; inset: 0; z-index: -2; background-image: radial-gradient(rgba(255, 255, 255, .1) 1.2px, transparent 1.5px); background-size: 22px 22px; }
.tt-glow { position: absolute; z-index: -1; right: -18%; bottom: -45%; width: 75%; aspect-ratio: 1; border-radius: 50%; background: var(--ac); opacity: .3; filter: blur(60px); }
.tt-disc { position: absolute !important; z-index: -1; right: -70px; bottom: -70px; width: 300px; box-shadow: 0 0 0 3px rgba(255, 255, 255, .15); }
.r3 .tt-disc { width: 250px; right: -60px; bottom: -80px; }
.tt-k { display: flex; align-items: center; gap: 10px; font-family: var(--fh); font-size: 12px; letter-spacing: 2.5px; color: var(--ac); }
.tt-k span { font-family: -apple-system, 'Microsoft YaHei', sans-serif; font-weight: 700; color: #fff; border: 1.5px solid rgba(255, 255, 255, .4); padding: 1px 9px; border-radius: 10px; letter-spacing: 1px; font-size: 11.5px; }
.bt-title h1 { font-family: var(--fh); font-size: 52px; line-height: 1.1; margin-top: 8px; letter-spacing: 1px; }
.tall .bt-title h1 { font-size: 64px; margin-top: 12px; }
.tt-lead { max-width: 27em; margin-top: 14px; font-size: 15px; line-height: 1.8; color: rgba(255, 255, 255, .8); }
.r3 .tt-lead { display: none; }
@media (min-height: 1000px) { .r3 .tt-lead { max-width: 30em; font-size: 14px; line-height: 1.7; margin-top: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; } }
.r3.bento .bt-title { padding: 18px 26px 20px; }
.r3 .bt-title h1 { font-size: 44px; margin-top: 6px; }
.r3 .tt-stats { margin-top: 10px; }
.r3 .tt-stats b { font-size: 24px; }
.r3 .bt-title .btn { height: 44px; }
.tt-stats { display: flex; margin-top: 14px; }
.tall .tt-stats { margin-top: 22px; }
.tt-stats span { display: flex; flex-direction: column; padding: 0 18px; font-size: 12px; font-weight: 700; line-height: 1.3; color: rgba(255, 255, 255, .62); border-left: 1.5px solid rgba(255, 255, 255, .22); }
.tt-stats span:first-child { padding-left: 0; border-left: 0; }
.tt-stats b { font-family: var(--fh); font-size: 28px; line-height: 1.2; color: var(--ac); }
.tall .tt-stats b { font-size: 34px; }
.tt-cvw { flex: 1 1 0; min-height: 0; max-height: 210px; max-width: 64%; margin: 22px 0 18px; display: flex; }
.tt-cv { position: relative; display: block; height: 100%; max-width: 100%; aspect-ratio: 16 / 9; border-radius: 16px; border: var(--bw) solid #fff; box-shadow: 6px 6px 0 var(--ac); overflow: hidden; background: #222; transition: transform .3s var(--ease), box-shadow .3s var(--ease); }
.tt-cv img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease); }
.tt-cv:hover { transform: translate(-2px, -3px); box-shadow: 8px 9px 0 var(--ac); }
.tt-cv:hover img { transform: scale(1.05); }
.tt-cv .bigplay { width: 56px; height: 56px; margin: -28px 0 0 -28px; }
.tt-cv .bigplay svg { width: 20px; height: 20px; margin-left: 4px; }
.bt-title .btn { margin-top: auto; border-color: var(--ac); box-shadow: 3px 3px 0 rgba(255, 255, 255, .25); max-width: 62%; }
.bt-title .btn small { font-size: 13px; font-weight: 700; opacity: .7; overflow: hidden; text-overflow: ellipsis; }

.bt { position: relative; display: flex; flex-direction: column; min-width: 0; min-height: 0; padding: 18px 20px; border-radius: 26px; border: var(--bw) solid var(--ink); box-shadow: var(--sh); background: var(--tc); color: var(--ink); overflow: hidden; isolation: isolate;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  animation: tileIn .65s var(--ease) backwards; animation-delay: calc(var(--i) * 55ms + 90ms); }
.bt::before { content: ''; position: absolute; inset: 0; z-index: -1; background: linear-gradient(160deg, rgba(255, 255, 255, .42), transparent 40%), radial-gradient(rgba(22, 22, 22, .13) 1.1px, transparent 1.4px) 0 0 / 16px 16px; }
.bt.w2 { grid-column: span 2; }
.bt.dk { color: #fff; }
.bt.dk::before { background: linear-gradient(160deg, rgba(255, 255, 255, .16), transparent 40%), radial-gradient(rgba(255, 255, 255, .16) 1.1px, transparent 1.4px) 0 0 / 16px 16px; }
.bt:hover { transform: translate(-3px, -5px); box-shadow: 9px 11px 0 var(--ink); }
.bt:active { transform: translate(3px, 3px); box-shadow: 2px 2px 0 var(--ink); transition-duration: .1s; }
.bt-top { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.bt-no { font-family: var(--fh); font-size: 30px; line-height: 1; color: var(--ink); -webkit-text-stroke: 0; }
.bt.dk .bt-no { color: #fff; }
.bt-cnt { display: inline-flex; align-items: baseline; gap: 3px; height: 28px; padding: 3px 11px 0; border-radius: 14px; background: var(--ink); color: #fff; font-size: 12.5px; font-weight: 700; white-space: nowrap; }
.bt-cnt b { font-family: var(--fh); font-size: 15px; line-height: 1.35; }
.bt.dk .bt-cnt { background: #fff; color: var(--ink); }
.bt-art { position: absolute; z-index: 1; right: 16px; top: 16px; width: 42%; aspect-ratio: 16 / 9; transform: rotate(3deg); transition: transform .5s var(--ease); }
.bt-pic { position: absolute; inset: 0; z-index: 1; border-radius: 12px; border: var(--bw) solid var(--ink); box-shadow: 4px 4px 0 var(--ink); overflow: hidden; background: #222; }
.bt-pic img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease); }
.bt-disc { position: absolute !important; z-index: 0; top: 7%; right: 8%; height: 86%; width: auto; transition: transform .7s var(--ease); }
.bt-art .has { position: absolute; z-index: 2; left: 7px; bottom: 7px; display: inline-flex; align-items: center; gap: 4px; padding: 2px 9px 2px 3px; border-radius: 12px; background: var(--lime); color: var(--ink); border: 2px solid var(--ink); font-size: 11.5px; font-weight: 800; line-height: 1.3; }
.bt-art .has .ico-play { width: 17px; height: 17px; }
.bt-art .has .ico-play svg { width: 7px; height: 7px; margin-left: 1px; }
.bt:hover .bt-art { transform: rotate(0deg) translateY(-6px) translateX(-18px); }
.bt:hover .bt-disc { transform: translateX(42%) rotate(160deg); }
.bt:hover .bt-pic img { transform: scale(1.07); }
.bt.w2 .bt-art { width: 40%; right: 20px; top: 18px; transform: rotate(2deg); }
.r2 .bt.w2 .bt-art { width: 44%; top: 22px; }
.r2 .bt:not(.w2) .bt-art { left: 28px; right: 28px; width: auto; top: var(--at, 100px); transform: rotate(-2deg); }
.r2 .bt:not(.w2):hover .bt-art { transform: rotate(0deg) translateY(-10px) translateX(-14px); }
.bt-bot { position: relative; z-index: 2; margin-top: auto; display: flex; align-items: flex-end; gap: 12px; }
.bt-tx { flex: 1; min-width: 0; }
.bt.w2 .bt-tx { max-width: 52%; }
.bt-tx h3 { font-family: var(--fh); font-size: 24px; line-height: 1.2; text-wrap: balance; }
.bt-tx p { margin-top: 3px; font-size: 13px; font-weight: 700; opacity: .75; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bt-tx .bt-brief { display: none; }
.r2 .bt.w2 .bt-brief { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; white-space: normal; margin-top: 10px; font-size: 13.5px; line-height: 1.6; font-weight: 500; opacity: .85; }
.bt-pk { display: grid; grid-template-rows: 0fr; opacity: 0; transition: grid-template-rows .45s var(--ease), opacity .3s; }
.bt-pk > ol { min-height: 0; overflow: hidden; }
.bt-pk li { font-size: 13px; font-weight: 700; line-height: 1.6; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bt-pk li:first-child { margin-top: 8px; padding-top: 7px; border-top: 2px dashed rgba(22, 22, 22, .3); }
.bt.dk .bt-pk li:first-child { border-top-color: rgba(255, 255, 255, .35); }
.bt-pk li i { font-style: normal; font-family: var(--fh); font-size: 11px; opacity: .55; margin-right: 6px; }
.bt:not(.w2) .bt-pk li:nth-child(3), .r3 .bt-pk li:nth-child(3) { display: none; }
@media (hover: hover) { .bt:hover .bt-pk { grid-template-rows: 1fr; opacity: 1; } }
.bt-go { flex-shrink: 0; margin-left: auto; width: 46px; height: 46px; border-radius: 50%; border: var(--bw) solid var(--ink); background: #fff; color: var(--ink); display: flex; align-items: center; justify-content: center; box-shadow: 2px 2px 0 var(--ink); transition: transform .4s var(--ease), background .25s, color .25s; }
.bt-go svg { width: 20px; height: 20px; }
.bt:hover .bt-go { background: var(--ink); color: var(--lime); transform: rotate(-45deg); }

/* ---------- 三级：课程页 ---------- */
.l3 .wrap { padding-top: 28px; }
.chead { display: flex; align-items: center; gap: 22px; }
.ch-disc { width: 112px; }
.ch-tx { min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.ch-k { font-family: var(--fh); font-size: 12px; letter-spacing: 2px; color: var(--grey); }
.chead h1 { font-family: var(--fh); font-size: 44px; line-height: 1.12; }
.chead h1 small { font-size: 21px; margin-left: 12px; color: var(--grey); }
.chead .tags { display: flex; flex-wrap: wrap; gap: 8px; }
.ctop { display: grid; grid-template-columns: 1fr 400px; gap: 28px; margin-top: 24px; align-items: start; }
.cintro { padding: 24px 26px; display: flex; flex-direction: column; gap: 18px; }
.cintro .lead { font-size: 16px; line-height: 1.85; }
.cintro h4 { font-family: var(--fh); font-size: 17px; margin-bottom: 9px; }
.cnt { display: flex; align-items: center; gap: 12px; }
.cnt b { font-family: var(--fh); font-size: 46px; line-height: 1; padding: 8px 16px 6px; border-radius: 16px; background: var(--cc, var(--sec)); color: var(--ck, var(--sec-ink)); border: var(--bw) solid var(--ink); box-shadow: 3px 3px 0 var(--ink); }
.cnt span { font-weight: 800; font-size: 16px; }
.info { padding: 24px 26px; display: flex; flex-direction: column; gap: 22px; }
.info h4 { font-family: var(--fh); font-size: 17px; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.info h4::before { content: ''; width: 13px; height: 13px; border-radius: 50%; background: var(--cc, var(--sec)); border: 2.5px solid var(--ink); }
.goals li { position: relative; padding: 4px 0 4px 32px; font-size: 15px; }
.goals li::before { content: ''; position: absolute; left: 0; top: 7px; width: 21px; height: 21px; border-radius: 50%; background: var(--lime) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5 10.5l3.2 3L15 6.5' fill='none' stroke='%23161616' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 100% no-repeat; border: 2.5px solid var(--ink); }
.flow { display: flex; flex-wrap: wrap; gap: 10px 6px; align-items: center; }
.flow li { display: flex; align-items: center; gap: 6px; }
.flow li b { display: inline-flex; align-items: center; gap: 7px; padding: 6px 14px 6px 6px; border-radius: 20px; border: 2.5px solid var(--ink); background: #fff; font-size: 14px; }
.flow li b i { font-style: normal; display: inline-flex; width: 23px; height: 23px; border-radius: 50%; background: var(--ink); color: var(--lime); font-size: 12px; align-items: center; justify-content: center; font-family: var(--fh); }
.flow li:not(:last-child)::after { content: ''; width: 14px; height: 3px; background: var(--ink); border-radius: 2px; }
.res { display: flex; flex-wrap: wrap; gap: 8px; }
.res span { padding: 5px 13px; border-radius: 12px; background: var(--paper); border: 2px solid var(--ink); font-size: 14px; font-weight: 700; }

.side { display: flex; flex-direction: column; gap: 16px; }
.sample { overflow: hidden; }
.sample .cv { position: relative; display: block; aspect-ratio: 16 / 9; background: #222; border-bottom: var(--bw) solid var(--ink); cursor: pointer; overflow: hidden; }
.sample .cv img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease); }
.sample .cv:hover img { transform: scale(1.04); }
.sample .cv.long { background: var(--paper2); background-image: radial-gradient(rgba(22, 22, 22, .14) 1.1px, transparent 1.4px); background-size: 14px 14px; }
.sample .cv.long img { position: absolute; left: 6%; top: 50%; width: 88%; height: auto; transform: translateY(-50%) rotate(-2deg); border-radius: 12px; border: var(--bw) solid var(--ink); box-shadow: 5px 5px 0 var(--ink); }
.sample .cv.long:hover img { transform: translateY(-50%) rotate(0) scale(1.03); }
.sample .cv .bigplay { width: 62px; height: 62px; margin: -31px 0 0 -31px; }
.sample .tx { padding: 14px 18px 18px; }
.sample .tx .k { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 800; letter-spacing: 1px; }
.sample .tx h3 { font-family: var(--fh); font-size: 20px; line-height: 1.3; margin: 5px 0 6px; }
.sample .tx p { font-size: 13.5px; color: var(--grey); }
.sample .tx .btn { margin-top: 12px; width: 100%; }
.nosample { padding: 18px 20px; background: var(--cc, #fff); color: var(--ck, var(--ink)); }
.nosample h3 { font-family: var(--fh); font-size: 19px; margin-bottom: 6px; }
.nosample p { font-size: 14px; opacity: .85; }

/* 目录 */
.grp-h { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 12px; margin: 26px 0 12px; }
.grp-h:first-child { margin-top: 0; }
.grp-h b { font-family: var(--fh); font-size: 18px; padding: 3px 13px; border-radius: 11px; background: var(--gc, var(--sec)); color: var(--gk, var(--sec-ink)); border: 2.5px solid var(--ink); }
.grp-h span { font-size: 13.5px; color: var(--grey); }
.dtabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.dtabs button { display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 7px 0 16px; border-radius: 22px; border: var(--bw) solid var(--ink); background: #fff; font-family: var(--fh); font-size: 16px; box-shadow: 3px 3px 0 var(--ink); transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s; }
.dtabs button small { min-width: 28px; height: 28px; padding: 0 7px; border-radius: 14px; background: var(--paper2); font-family: -apple-system, 'Microsoft YaHei', sans-serif; font-weight: 800; font-size: 12px; display: inline-flex; align-items: center; justify-content: center; }
.dtabs button:hover { transform: translate(-1px, -2px); box-shadow: 4px 5px 0 var(--ink); }
.dtabs button.on { background: var(--gc); color: var(--gk); box-shadow: 5px 5px 0 var(--ink); transform: translate(-2px, -2px); }
.dtabs button.on small { background: var(--ink); color: #fff; }
.dpane { display: none; }
.dpane.on { display: block; }
.dpane.on .ls { animation: itemIn .45s var(--ease) backwards; animation-delay: calc(var(--d) * 22ms); }
.dirblk:not(.tabbed) .dpane + .dpane { margin-top: 28px; }
.lessons { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.lessons.wide { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.lessons.strips { grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); }
.ls { position: relative; display: flex; flex-direction: column; border-radius: 16px; border: var(--bw) solid var(--ink); background: #fff; overflow: hidden; box-shadow: 4px 4px 0 var(--ink); transition: transform .25s var(--ease), box-shadow .25s var(--ease); }
.ls .im { position: relative; aspect-ratio: 16 / 9; background: var(--paper2); border-bottom: 2.5px solid var(--ink); overflow: hidden; }
.ls .im.c3 { aspect-ratio: 3 / 2; }
.ls .im.sq { aspect-ratio: 1; }
.ls .im.sg { aspect-ratio: 859 / 264; }
.ls .im.strip { aspect-ratio: 345 / 100; }
.ls .im.yc { aspect-ratio: 257 / 100; }
.ls .im img { width: 100%; height: 100%; object-fit: cover; }
.ls .im.gen { display: flex; flex-direction: column; justify-content: space-between; gap: 2px; padding: 8px 11px; background: var(--gc, var(--sec)); color: var(--gk, var(--sec-ink)); background-image: radial-gradient(rgba(22, 22, 22, .16) 1.1px, transparent 1.4px); background-size: 14px 14px; }
.ls .im.gen .gl { align-self: flex-start; font-size: 11px; font-weight: 800; padding: 0 8px; border-radius: 8px; background: #fff; color: var(--ink); border: 2px solid var(--ink); max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ls .im.gen .gt { font-family: var(--fh); font-size: 18px; line-height: 1.2; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ls .im.gen .gn { position: absolute; right: 10px; top: 6px; font-family: var(--fh); font-size: 26px; line-height: 1; opacity: .35; }
.ls .im.strip.gen .gt, .ls .im.yc.gen .gt { font-size: 17px; }
.ls .tx { padding: 9px 12px 11px; }
.ls .tx b { display: block; font-size: 14.5px; line-height: 1.4; }
.ls .tx b i { font-style: normal; font-family: var(--fh); font-size: 11.5px; color: var(--grey); margin-right: 6px; }
.ls .tx span { display: block; font-size: 12.5px; color: var(--grey); line-height: 1.5; margin-top: 3px; }
.ls.playable { cursor: pointer; background: var(--lime); }
.ls.playable .im::after { content: attr(data-pl) ' ▶'; position: absolute; right: 7px; bottom: 7px; padding: 1px 10px; border-radius: 10px; background: var(--lime); border: 2px solid var(--ink); font-size: 12px; font-weight: 800; color: var(--ink); }
.ls.playable:hover { transform: translate(-2px, -3px); box-shadow: 6px 7px 0 var(--ink); }
.ls.noimg .tx { padding: 12px 13px; }
.names { display: flex; flex-wrap: wrap; gap: 8px; }
.names span { padding: 6px 14px; border-radius: 14px; border: 2.5px solid var(--ink); background: #fff; font-size: 14px; font-weight: 700; transition: transform .2s var(--ease), background .2s; }
.names span:hover { background: var(--cc, var(--lime)); color: var(--ck, var(--ink)); transform: translateY(-2px) rotate(-1.5deg); }
.names.songs span::before { content: '♪'; margin-right: 6px; color: var(--grey); }
.dirs4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.dcol { padding: 0 0 6px; border-radius: 20px; border: var(--bw) solid var(--ink); background: #fff; box-shadow: 5px 5px 0 var(--ink); overflow: hidden; }
.dcol h4 { font-family: var(--fh); font-size: 19px; display: flex; flex-direction: column; gap: 4px; padding: 14px 16px; background: var(--gc); color: var(--gk); border-bottom: var(--bw) solid var(--ink); }
.dcol h4 small { align-self: flex-start; font-family: -apple-system, 'Microsoft YaHei', sans-serif; font-size: 12px; font-weight: 700; padding: 1px 9px; border-radius: 10px; background: var(--ink); color: #fff; }
.dcol li { padding: 10px 16px; }
.dcol li + li { border-top: 2px dashed rgba(22, 22, 22, .14); }
.dcol li b { font-size: 13px; display: block; color: var(--grey); }
.dcol li span { font-size: 15px; font-weight: 700; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; counter-reset: s; }
.steps li { position: relative; padding: 16px 16px 16px; border-radius: 18px; border: var(--bw) solid var(--ink); background: var(--gc); color: var(--gk); box-shadow: 4px 4px 0 var(--ink); }
.steps li::before { counter-increment: s; content: counter(s, decimal-leading-zero); font-family: var(--fh); font-size: 28px; line-height: 1.2; display: block; margin-bottom: 18px; }
.steps li b { display: block; font-family: var(--fh); font-size: 19px; }
.steps li span { font-size: 13px; opacity: .8; }

/* 大师课课表 */
.tt-tabs { margin-bottom: 14px; }
.tt-tools { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 14px; }
.tt-legend { display: flex; flex-wrap: wrap; gap: 6px; }
.tt-legend i { font-style: normal; font-size: 12px; font-weight: 800; padding: 1px 10px; border-radius: 10px; background: var(--ec); color: var(--ek); border: 2px solid var(--ink); }
.tt-all { height: 38px; padding: 0 16px; border-radius: 19px; border: var(--bw) solid var(--ink); background: #fff; font-weight: 800; font-size: 13.5px; box-shadow: 3px 3px 0 var(--ink); transition: transform .2s var(--ease), box-shadow .2s var(--ease); }
.tt-all:hover { transform: translate(-1px, -2px); box-shadow: 4px 5px 0 var(--ink); }
.tt.all .tt-all { background: var(--ink); color: #fff; }
.xbar { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; padding: 10px 14px; border-radius: 14px; border: 2.5px dashed var(--red); background: #fff4f1; font-size: 14px; font-weight: 600; }
.xbar b { flex-shrink: 0; padding: 1px 10px; border-radius: 9px; background: var(--red); color: #fff; font-size: 13px; }
.xbar.ok { border: 2.5px solid var(--ink); background: #f4fdd6; }
.xbar.ok b { background: var(--ink); color: var(--lime); }
.tt-grid { border: var(--bw) solid var(--ink); border-radius: 22px; background: #fff; box-shadow: var(--sh); overflow: hidden; overflow: clip; }
.tr { display: grid; grid-template-columns: 70px repeat(8, minmax(0, 1fr)); border-top: 2px solid rgba(22, 22, 22, .1); animation: itemIn .4s var(--ease) backwards; animation-delay: calc(var(--d) * 22ms); }
.tr.th { position: sticky; top: 70px; z-index: 3; border-top: 0; background: var(--ink); animation: none; }
.th .td { display: flex; align-items: center; justify-content: center; padding: 10px 6px; background: var(--ec); color: var(--ek); font-family: var(--fh); font-size: 14px; text-align: center; border-left: 2.5px solid var(--ink); }
.th .td::before { display: none; }
.th .tn { color: #fff; font-family: var(--fh); font-size: 12px; cursor: default; background: var(--ink); }
.tn { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; background: var(--paper); transition: background .2s; }
.tn b { font-family: var(--fh); font-size: 22px; line-height: 1; }
.tn small { display: none; font-size: 11px; font-weight: 800; color: var(--grey); }
.tr:not(.th) .tn:hover { background: var(--lime); }
.tr.open .tn { background: var(--ink); color: var(--lime); }
.tr.open .tn small { color: #fff; }
.td { position: relative; display: block; min-width: 0; padding: 9px 9px 10px 14px; border-left: 2px solid rgba(22, 22, 22, .08); font-size: 13px; line-height: 1.45; transition: background .2s; }
.td::before { content: ''; position: absolute; left: 4px; top: 9px; bottom: 9px; width: 4px; border-radius: 2px; background: var(--ec); }
.td b { display: block; font-weight: 700; overflow-wrap: anywhere; }
.td .tc { display: none; margin-top: 4px; font-size: 12px; color: var(--grey); line-height: 1.5; overflow-wrap: anywhere; }
.tr.open .tc, .tt.all .tc { display: block; animation: fadeIn .3s; }
.tr.rv .td { background: #fff7d9; }
.tr:not(.th):hover .td { background: #faf6ea; }
.td.playable { background: #f1fbcf !important; padding-right: 30px; }
.td.playable:hover { background: var(--lime) !important; }
.td .tp { position: absolute; right: 6px; bottom: 7px; width: 22px; height: 22px; border-radius: 50%; background: var(--ink); color: var(--lime); display: flex; align-items: center; justify-content: center; }
.td .tp svg { width: 8px; height: 8px; margin-left: 1px; }

/* 热身：暖身操卡片 + 律动音乐 */
.wgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.wc { position: relative; display: flex; flex-direction: column; border-radius: 18px; border: var(--bw) solid var(--ink); background: #fff; box-shadow: 4px 4px 0 var(--ink); overflow: hidden; transition: transform .25s var(--ease), box-shadow .25s var(--ease); animation: itemIn .45s var(--ease) backwards; animation-delay: calc(var(--d) * 25ms); }
.wc .im { position: relative; aspect-ratio: 345 / 100; background: #222; border-bottom: 2.5px solid var(--ink); overflow: hidden; }
.wc .im img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.wc .bigplay { opacity: 0; transform: scale(.6); transition: opacity .25s, transform .3s var(--ease); }
.wc b { display: block; padding: 9px 13px 0; font-size: 15px; }
.wc small { display: block; padding: 0 13px 10px; font-size: 12px; font-weight: 700; color: var(--grey); }
.wc:hover { transform: translate(-2px, -3px); box-shadow: 6px 7px 0 var(--ink); }
.wc:hover .im img { transform: scale(1.06); }
.wc:hover .bigplay { opacity: 1; transform: none; }
.tracks { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 12px; }
.trk { position: relative; display: flex; align-items: center; gap: 12px; padding: 9px 12px 13px 9px; border-radius: 16px; border: var(--bw) solid var(--ink); background: #fff; box-shadow: 3px 3px 0 var(--ink); text-align: left; overflow: hidden; transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .25s; animation: itemIn .45s var(--ease) backwards; animation-delay: calc(var(--d) * 25ms); }
.trk:hover { transform: translate(-1px, -2px); box-shadow: 4px 5px 0 var(--ink); }
.trk-disc { width: 50px; box-shadow: 0 0 0 2px var(--ink); }
.trk.playing .trk-disc .vl { animation: spin 2.4s linear infinite; }
.trk-n { font-family: var(--fh); font-size: 13px; color: var(--grey); }
.trk b { flex: 1; min-width: 0; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.trk-p { width: 34px; height: 34px; border-radius: 50%; border: 2.5px solid var(--ink); background: var(--lime); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.trk-p svg { width: 11px; height: 11px; margin-left: 2px; }
.trk.playing .trk-p svg { margin-left: 0; }
.trk-bar { position: absolute; left: 0; right: 0; bottom: 0; height: 5px; background: rgba(22, 22, 22, .08); }
.trk-bar i { position: absolute; inset: 0; background: var(--ink); transform: scaleX(0); transform-origin: 0 50%; transition: transform .25s linear; }
.trk.on { background: var(--yellow); }
.trk.on .trk-p { background: var(--ink); color: var(--lime); }

/* 气息：竖卡 */
.pgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }
.pcard { display: flex; flex-direction: column; border-radius: 18px; border: var(--bw) solid var(--ink); background: #fff; box-shadow: 4px 4px 0 var(--ink); overflow: hidden; transition: transform .25s var(--ease), box-shadow .25s var(--ease); animation: itemIn .45s var(--ease) backwards; animation-delay: calc(var(--d) * 35ms); }
.pcard .im { position: relative; aspect-ratio: 3 / 5; background: #222; border-bottom: 2.5px solid var(--ink); overflow: hidden; }
.pcard .im img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.pcard .bigplay { opacity: 0; transform: scale(.6); transition: opacity .25s, transform .3s var(--ease); }
.pcard b { padding: 9px 12px 0; font-size: 15px; }
.pcard small { padding: 0 12px 10px; font-size: 12px; font-weight: 700; color: var(--grey); }
.pcard:hover { transform: translate(-2px, -4px) rotate(-1deg); box-shadow: 6px 8px 0 var(--ink); }
.pcard:hover .im img { transform: scale(1.06); }
.pcard:hover .bigplay { opacity: 1; transform: none; }

/* 发声曲库 / 歌曲曲库：嵌在页面里的窗口 */
.emb { border-radius: 22px; border: var(--bw) solid var(--ink); box-shadow: var(--sh); overflow: hidden; background: #fff; }
.emb-bar { display: flex; align-items: center; gap: 10px; height: 52px; padding: 0 10px 0 16px; background: var(--ink); color: #fff; }
.emb-bar .dots { display: flex; gap: 7px; }
.emb-bar .dots i { width: 13px; height: 13px; border-radius: 50%; background: var(--red); }
.emb-bar .dots i:nth-child(2) { background: var(--yellow); }
.emb-bar .dots i:nth-child(3) { background: var(--lime); }
.emb-url { flex: 1; min-width: 0; height: 32px; padding: 0 14px; border-radius: 16px; background: rgba(255, 255, 255, .1); font-size: 13px; line-height: 32px; color: #d9d4c6; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ebtn { display: inline-flex; align-items: center; gap: 6px; height: 34px; padding: 0 13px; border-radius: 17px; border: 2px solid #fff; font-size: 13.5px; font-weight: 800; white-space: nowrap; transition: background .2s, color .2s; }
.ebtn svg { width: 15px; height: 15px; }
.ebtn:first-of-type { background: var(--lime); color: var(--ink); border-color: var(--lime); }
.ebtn:hover { background: #fff; color: var(--ink); }
.emb-box { position: relative; height: clamp(540px, 80vh, 900px); background: var(--paper); }
.emb-box iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.libs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.lib { display: inline-flex; align-items: center; gap: 9px; padding: 7px 14px 7px 8px; border-radius: 16px; border: var(--bw) solid var(--ink); background: var(--gc); color: var(--gk); box-shadow: 3px 3px 0 var(--ink); font-weight: 800; font-size: 15px; }
.lib b { font-family: var(--fh); font-size: 15px; min-width: 32px; height: 32px; padding: 0 6px; border-radius: 16px; background: var(--ink); color: #fff; display: inline-flex; align-items: center; justify-content: center; }
.lib small { font-size: 12px; font-weight: 700; opacity: .75; }
.topics { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; align-items: start; }
.topic { border-radius: 16px; border: var(--bw) solid var(--ink); background: #fff; box-shadow: 3px 3px 0 var(--ink); overflow: hidden; }
.topic summary { display: flex; align-items: center; gap: 10px; padding: 10px 14px; cursor: pointer; list-style: none; background: var(--gc); color: var(--gk); }
.topic summary::-webkit-details-marker { display: none; }
.topic summary b { flex: 1; font-family: var(--fh); font-size: 17px; }
.topic summary small { font-weight: 800; font-size: 12.5px; padding: 1px 9px; border-radius: 10px; background: var(--ink); color: #fff; }
.topic summary::after { content: '+'; font-family: var(--fh); font-size: 20px; line-height: 1; transition: transform .3s var(--ease); }
.topic[open] summary::after { transform: rotate(45deg); }
.topic ol { padding: 8px 14px 12px; counter-reset: t; border-top: var(--bw) solid var(--ink); }
.topic li { counter-increment: t; font-size: 14px; padding: 4px 0; border-bottom: 1.5px dashed rgba(22, 22, 22, .12); }
.topic li::before { content: counter(t, decimal-leading-zero); font-family: var(--fh); font-size: 11px; color: var(--grey); margin-right: 9px; }

/* 舞台表现八大板块 */
.blocks { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.blk { position: relative; display: flex; flex-direction: column; border-radius: 20px; border: var(--bw) solid var(--ink); background: #fff; box-shadow: 5px 5px 0 var(--ink); overflow: hidden; transition: transform .25s var(--ease), box-shadow .25s var(--ease); animation: itemIn .45s var(--ease) backwards; animation-delay: calc(var(--d) * 40ms); }
.blk-im { display: flex; align-items: center; justify-content: center; padding: 16px; background: var(--gc); border-bottom: var(--bw) solid var(--ink); background-image: radial-gradient(rgba(22, 22, 22, .14) 1.1px, transparent 1.4px); background-size: 14px 14px; }
.blk-im img { width: 56%; height: auto; filter: drop-shadow(3px 4px 0 rgba(22, 22, 22, .85)); transition: transform .4s var(--ease); }
.blk-tx { padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 8px; }
.blk-tx b { font-family: var(--fh); font-size: 19px; }
.blk-it { display: flex; flex-wrap: wrap; gap: 5px; }
.blk-it i { font-style: normal; font-size: 12.5px; font-weight: 700; padding: 1px 9px; border-radius: 9px; background: var(--paper); border: 1.5px solid rgba(22, 22, 22, .3); }
.blk-p { position: absolute; right: 10px; top: 10px; display: inline-flex; align-items: center; gap: 5px; padding: 2px 11px 2px 3px; border-radius: 14px; background: var(--lime); border: 2.5px solid var(--ink); font-size: 12.5px; font-weight: 800; box-shadow: 2px 2px 0 var(--ink); }
.blk.playable:hover { transform: translate(-2px, -4px); box-shadow: 7px 9px 0 var(--ink); }
.blk.playable:hover .blk-im img { transform: scale(1.08) rotate(-4deg); }

/* 全年活动日历：一个月一张卡，卡头按季节上色 */
.cal-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 16px; margin-bottom: 16px; }
.cal-fix { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 13px; font-weight: 700; }
.cal-fix b { padding: 2px 10px; border-radius: 10px; background: var(--ink); color: var(--lime); }
.cal-fix span { padding: 1px 10px; border-radius: 10px; border: 2px solid var(--ink); background: #fff; }
.cal { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.mon { display: flex; flex-direction: column; border-radius: 20px; border: var(--bw) solid var(--ink); background: #fff; box-shadow: 5px 5px 0 var(--ink); overflow: hidden; animation: itemIn .45s var(--ease) backwards; animation-delay: calc(var(--d) * 35ms); }
.mon.now { box-shadow: 5px 5px 0 var(--ink), 0 0 0 5px var(--lime); }
.mon-h { display: flex; align-items: baseline; gap: 3px; padding: 10px 14px 9px; background: var(--mc); color: var(--mk); border-bottom: var(--bw) solid var(--ink); background-image: radial-gradient(rgba(22, 22, 22, .16) 1.1px, transparent 1.4px); background-size: 14px 14px; }
.mon-h b { font-family: var(--fh); font-size: 40px; line-height: 1; }
.mon-h span { font-family: var(--fh); font-size: 16px; }
.mon-h i { align-self: center; margin-left: 8px; font-style: normal; font-size: 12px; font-weight: 800; padding: 1px 9px; border-radius: 9px; background: var(--ink); color: var(--lime); }
.mon-h em { align-self: center; margin-left: auto; font-style: normal; font-size: 12px; font-weight: 800; padding: 1px 9px; border-radius: 10px; background: #fff; color: var(--ink); border: 2px solid var(--ink); white-space: nowrap; }
.mon ul { flex: 1; padding: 4px 0; }
.mon li + li { border-top: 2px dashed rgba(22, 22, 22, .12); }
.ev { position: relative; display: block; padding: 9px 44px 10px 14px; transition: background .2s; }
.ety { display: inline-block; font-style: normal; font-size: 11px; font-weight: 800; line-height: 1.5; padding: 0 8px; border-radius: 8px; background: var(--ec); color: var(--ek); border: 2px solid var(--ink); margin-bottom: 3px; }
.ev b { display: block; font-size: 14.5px; line-height: 1.4; }
.ev .ed { display: block; font-size: 12.5px; line-height: 1.5; color: var(--grey); margin-top: 2px; }
.ev .tp { position: absolute; right: 12px; top: 50%; width: 28px; height: 28px; margin-top: -14px; border-radius: 50%; background: var(--ink); color: var(--lime); display: flex; align-items: center; justify-content: center; transition: background .2s, color .2s, transform .25s var(--ease); }
.ev .tp svg { width: 9px; height: 11px; margin-left: 2px; }
a.ev:hover { background: #f4fdd6; }
a.ev:hover .tp { background: var(--lime); color: var(--ink); transform: scale(1.12); }

.pager { display: flex; justify-content: space-between; gap: 14px; margin-top: 48px; flex-wrap: wrap; }
.pager a { flex: 1; min-width: 220px; padding: 14px 18px; display: flex; flex-direction: column; }
.pager a.nx { text-align: right; }
.pager a small { font-size: 12px; color: var(--grey); font-weight: 700; }
.pager a b { font-family: var(--fh); font-size: 18px; }

/* ---------- 页脚（只在课程页） ---------- */
.foot { margin-top: 60px; border-top: var(--bw) solid var(--ink); background: var(--ink); color: #c9c3b3; font-size: 13px; }
.foot .wrap { padding-top: 26px; padding-bottom: 30px; display: flex; flex-wrap: wrap; gap: 10px 24px; align-items: center; justify-content: space-between; }
.foot img { width: 44px; filter: invert(1); }
.foot b { color: var(--lime); font-weight: 700; }

/* ---------- 样课播放层 ---------- */
.player { position: fixed; inset: 0; z-index: 80; display: none; background: rgba(18, 17, 14, .97); overflow: hidden; }
.player.open { display: block; animation: fadeIn .25s; }
.pin { position: absolute; left: 0; top: 0; display: flex; flex-direction: column; transform-origin: 50% 50%; }
.pbar { flex-shrink: 0; display: flex; align-items: center; gap: 10px; padding: 10px 16px; color: #fff; }
.pbar .tt { flex: 1; min-width: 0; line-height: 1.3; }
.pbar .tt b { display: block; font-family: var(--fh); font-size: 18px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pbar .tt span { font-size: 12.5px; color: #b5af9f; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
.pbtn { height: 38px; padding: 0 14px; border-radius: 19px; border: 2px solid #fff; color: #fff; font-size: 14px; font-weight: 700; display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.pbtn svg { width: 16px; height: 16px; }
.pbar .tt .mic { color: var(--lime); font-weight: 700; }
.pbtn.hl { background: var(--lime); color: var(--ink); border-color: var(--lime); }
.pbtn.hl .lbl { display: inline; }
.pbtn.x { width: 38px; padding: 0; justify-content: center; background: var(--lime); color: var(--ink); border-color: var(--lime); font-size: 22px; }
.pstage { flex: 1; min-height: 0; display: flex; align-items: center; justify-content: center; padding: 0 16px 16px; }
.pbox { position: relative; background: #000; border-radius: 12px; overflow: hidden; box-shadow: 0 0 0 3px #fff; }
.player.full .pbox { background: var(--paper); }
.pbox iframe, .pbox video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: #000; }
.player.full .pbox iframe { background: var(--paper); }
.ptip { display: none; position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%); padding: 8px 14px; border-radius: 16px; background: var(--lime); color: var(--ink); font-size: 13px; font-weight: 700; white-space: nowrap; box-shadow: 0 0 0 2px var(--ink); }
.player.portrait .ptip { display: block; }
.player.rot .pstage { padding: 0; }
.player.rot .pbox { border-radius: 0; box-shadow: none; }
.player.rot .ptip { display: none; }
.rot-btn { display: none; }
.player.portrait .rot-btn, .player.rot .rot-btn { display: inline-flex; }
.player.rot .rot-btn { background: #fff; color: var(--ink); }

/* ---------- 电脑屏幕矮一些时（笔记本）收紧，仍然一屏放下 ---------- */
@media (min-width: 901px) and (max-height: 780px) {
  .bar-in { height: 62px; }
  .tr.th { top: 62px; }
  .l1-head { padding-bottom: 12px; }
  .kick { display: none; }
  .l1-head h1 { font-size: 30px; }
  .l1-stats span { padding: 6px 14px; }
  .l1-stats b { font-size: 20px; }
  .marq { height: 42px; }
  .pn-in { padding: 24px 30px 26px; }
  .pn-t { font-size: 48px; margin: 8px 0 10px; }
  .pn-lead { font-size: 14.5px; }
  .pn-subs { margin-top: 12px; }
  .pn-nums { margin-top: 14px; }
  .pn-nums b { font-size: 25px; }
  .pn-v { font-size: 28px; letter-spacing: 4px; }
  .pn-wm { font-size: 130px; }
  .bento { padding-bottom: 18px; gap: 12px; }
  .bento.r3 { grid-template-rows: repeat(3, minmax(165px, 1fr)); }
  .bt-title { padding: 18px 24px 20px; }
  .bt-title h1 { font-size: 40px; }
  .tall .bt-title h1 { font-size: 52px; }
  .r3 .tt-stats, .r3 .tt-lead { display: none; }
  .tt-stats b { font-size: 24px; }
  .tall .tt-stats b { font-size: 28px; }
  .bt { padding: 14px 18px; }
  .bt-no { font-size: 25px; }
  .bt-tx h3 { font-size: 21px; }
  .bt { --at: 88px; }
  .pn-en { display: none; }
  .pn-head { gap: 12px; padding-bottom: 80px; }
  .pn-peek { width: 130px; margin-left: -65px; bottom: -68px; }
}
/* 七条手风琴在窄一点的电脑屏上：展开那条再放宽，收起的条变瘦，字和按钮都收一点 */
@media (min-width: 901px) and (max-width: 1200px) {
  .acc { --g: 9; --gap: 10px; }
  .pn-head { padding: 20px 4px 84px; gap: 12px; }
  .pn-no { font-size: 15px; padding: 6px 7px; }
  .pn-v { font-size: 24px; letter-spacing: 2px; }
  .pn-en { display: none; }
  .pn-n.st { display: none; }   /* 条太瘦，「13 个维度」会折成两行，收起时不放 */
  .pn-n.st + .pn-ic { margin-top: auto; }
  .pn-ic { width: 38px; height: 38px; }
  .pn-peek { width: 116px; margin-left: -58px; bottom: -62px; }
  .pn-in { padding: 24px 26px; }
  .pn-t { font-size: 44px; margin: 8px 0 10px; }
  .pn-lead { max-width: 60%; font-size: 14px; line-height: 1.7; }
  .pn-subs { max-width: 64%; margin-top: 12px; gap: 6px; }
  .pn-subs a { font-size: 12px; padding: 2px 10px; }
  .pn-nums { margin-top: 14px; }
  .pn-nums b { font-size: 26px; }
  .pn-rec { width: min(44%, 38vh, 240px); }
  .sleeve em { left: 6px; right: 6px; bottom: 6px; font-size: 10.5px; letter-spacing: 0; padding: 2px 5px; }   /* 封套小了，「01 声乐专业课」要放得下 */
  .pn-wm { font-size: 120px; }
}
/* 方块上的小封面按方块实际高度缩，矮屏上也不压住箭头和课名 */
@supports (width: 1cqh) {
  @media (min-width: 901px) and (min-height: 620px) {
    .bt { container-type: size; }
    .bt.w2 .bt-art { width: min(42cqw, calc((100cqh - 62px) * 1.7778)); }
    .r2 .bt.w2 .bt-art { width: min(44cqw, calc((100cqh - 58px) * 1.7778)); }
    .r2 .bt:not(.w2) .bt-art { left: 50%; right: auto; width: min(calc(100cqw - 40px), calc((100cqh - var(--at, 100px) - 42px) * 1.7778)); transform: translateX(-50%) rotate(-2deg); }
    .r2 .bt:not(.w2):hover .bt-art { transform: translateX(-50%) translateY(-10px) translateX(-14px); }
  }
}

/* ---------- 平板 ---------- */
@media (max-width: 1080px) {
  .lessons { grid-template-columns: repeat(4, 1fr); }
  .ctop { grid-template-columns: 1fr 340px; }
  .bar-hint { display: none; }
  .brand .sys { display: none; }
  .sw a { padding: 0 11px 0 8px; font-size: 13px; }
  .bt-tx h3 { font-size: 21px; }
  .dirs4, .blocks { grid-template-columns: repeat(2, 1fr); }
  .cal { grid-template-columns: repeat(3, 1fr); }
  .tr { grid-template-columns: 56px repeat(8, minmax(0, 1fr)); }
  .td { font-size: 12.5px; padding: 8px 6px 9px 12px; }
  .th .td { font-size: 12.5px; }
}
/* 手风琴改竖排、方块改两列 */
@media (max-width: 900px) {
  .lessons { grid-template-columns: repeat(3, 1fr); }
  .ctop { grid-template-columns: 1fr; }
  .cal { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .brand .sys { display: flex; }
  .brand.sm .sys { display: none; }

  .l1-in { padding-bottom: 18px; }
  .acc { flex: none; flex-direction: column; min-height: 0; gap: 12px; }
  .pn { flex: none; border-radius: 24px; box-shadow: 5px 5px 0 var(--ink); transition: box-shadow .3s; }
  .pn.on { cursor: pointer; }
  .pn:not(.on):hover { transform: none; box-shadow: 5px 5px 0 var(--ink); }
  .pn-head { position: relative; inset: auto; flex-direction: row; align-items: center; gap: 10px; padding: 12px 12px 12px 14px; text-align: left; overflow: hidden; }
  .pn.on .pn-head { opacity: 1; visibility: visible; }
  .pn-no { font-size: 14px; padding: 6px 8px; }
  .pn-v { writing-mode: horizontal-tb; font-size: 22px; letter-spacing: 1px; }
  .pn-en { writing-mode: horizontal-tb; font-size: 10px; letter-spacing: 2px; }
  .pn-n { margin: 0 64px 0 auto; position: relative; z-index: 1; }
  .pn-ic { width: 40px; height: 40px; position: relative; z-index: 1; }
  .pn-ic svg { width: 17px; height: 17px; }
  .pn:hover .pn-ic { transform: none; background: #fff; }
  .pn.on .pn-ic { background: var(--ink); color: var(--lime); }
  .dark.on .pn-ic { background: #fff; color: var(--ink); }
  .pn.on .pn-ic .ip { display: none; }
  .pn.on .pn-ic .ia { display: block; }
  .pn-peek { left: auto; right: 30px; bottom: auto; top: 50%; width: 88px; margin: -44px 0 0; }
  .pn:not(.on):hover .pn-peek { transform: none; }
  .pn.on .pn-peek { opacity: 0; }
  .pn-en { display: none; }
  .pn-bw { position: static; display: grid; grid-template-rows: 0fr; transition: grid-template-rows .5s var(--ease), opacity .3s, visibility 0s .5s; }
  .pn.on .pn-bw { grid-template-rows: 1fr; transition: grid-template-rows .5s var(--ease), opacity .45s .08s, visibility 0s; }
  .pn-body { position: static; width: auto; min-height: 0; overflow: hidden; }
  .pn-in { height: auto; padding: 2px 14px 16px; }
  .pn-k, .pn-t, .pn-wm { display: none; }
  .pn.on .pn-in > :not(.pn-deco) { transition-delay: .1s; }
  .pn-deco { top: 0; bottom: auto; right: 10px; width: 120px; height: 120px; }
  .pn-rec { right: 26px; top: 6px; width: 92px; transform: rotate(-5deg); }
  .pn.on .pn-rec { transform: rotate(-5deg); }
  .pn.on .pn-rec .vinyl { transform: translateX(26%) rotate(5deg); }
  .sleeve { box-shadow: 4px 4px 0 var(--ink); border-radius: 8px; }
  .sleeve em { display: none; }
  .pn-lead { max-width: none; min-height: 110px; padding-right: 128px; font-size: 14px; }
  .pn-subs { max-width: none; margin-top: 10px; gap: 6px; }
  .pn-subs a { font-size: 12.5px; padding: 2px 10px; }
  .pn-nums { margin-top: 14px; }
  .pn-nums span { padding: 0 14px; }
  .pn-nums b { font-size: 22px; }
  .pn-acts { width: 100%; padding-top: 14px; gap: 10px; }
  .pn-acts .btn { flex: 1; height: 46px; font-size: 15px; padding: 0 12px; }
  .marq { height: 42px; }
  .marq a { font-size: 14px; padding: 0 16px; }

  .bar-in { flex-wrap: wrap; height: auto; min-height: 62px; padding: 10px 16px; gap: 10px; }
  .sw { order: 3; width: 100%; margin: 0; justify-content: space-between; overflow-x: auto; scrollbar-width: none; }
  .sw::-webkit-scrollbar { display: none; }
  .sw a { flex: 1 0 auto; justify-content: center; }
  .back { margin-right: auto; }
  .bar.solid .bar-in { flex-wrap: nowrap; }
  .bar.solid .back { margin-right: 0; }

  .bento { grid-template-columns: 1fr 1fr; padding: 2px 16px 24px; gap: 12px; }
  .bento.r2, .bento.r3 { grid-template-rows: none; grid-auto-rows: auto; }
  .bt-title, .tall .bt-title, .r3.bento .bt-title { grid-column: 1 / -1; grid-row: auto; padding: 20px 20px 22px; border-radius: 24px; }
  .bt-title h1, .tall .bt-title h1, .r3 .bt-title h1 { font-size: 38px; margin-top: 6px; }
  .tt-k { flex-wrap: wrap; row-gap: 8px; padding-right: 92px; font-size: 11px; letter-spacing: 1.6px; }
  .tt-k span { white-space: nowrap; letter-spacing: .5px; }
  .r3 .tt-lead, .tt-lead { display: block; max-width: none; padding-right: 92px; font-size: 14px; margin-top: 10px; -webkit-line-clamp: unset; }
  .tt-disc, .r3 .tt-disc { width: 150px; right: -36px; top: -30px; bottom: auto; }
  .tt-cvw { flex: none; display: block; width: 100%; max-width: 480px; max-height: none; margin: 18px 0 0; }
  .tt-cv { width: 100%; height: auto; }
  .tt-stats, .tall .tt-stats, .r3 .tt-stats { display: flex; margin-top: 16px; }
  .tt-stats b, .tall .tt-stats b { font-size: 26px; }
  .bt-title .btn { margin-top: 18px; max-width: 100%; }
  .bt { min-height: 214px; padding: 14px; border-radius: 22px; box-shadow: 5px 5px 0 var(--ink); }
  .bt.w2 { grid-column: 1 / -1; min-height: 176px; }
  .bt:not(.w2) .bt-art, .r2 .bt:not(.w2) .bt-art { position: relative; left: auto; right: auto; top: auto; width: 100%; margin: 12px 0; transform: rotate(-2deg); }
  .bt.w2 .bt-art, .r2 .bt.w2 .bt-art { width: 46%; right: 14px; top: 14px; }
  .bt-disc { display: none; }
  .bt-no { font-size: 24px; }
  .bt-tx h3 { font-size: 18px; }
  .bt-tx p { font-size: 12px; }
  .r2 .bt.w2 .bt-brief { display: none; }
  .bt-pk { display: none; }
  .bt-go { width: 36px; height: 36px; }
  .bt-go svg { width: 16px; height: 16px; }

  /* 课表：手机上一节课一张卡，收起时只露歌曲，点开看八个环节 */
  .tt-grid { border: 0; background: none; box-shadow: none; overflow: visible; display: flex; flex-direction: column; gap: 10px; }
  .tr.th { display: none; }
  .tr { display: block; border: var(--bw) solid var(--ink); border-radius: 18px; background: #fff; box-shadow: 4px 4px 0 var(--ink); overflow: hidden; }
  .tn { width: 100%; flex-direction: row; justify-content: flex-start; gap: 10px; padding: 8px 14px; border-bottom: 2px solid var(--ink); }
  .tn b { font-size: 18px; }
  .tn small { display: inline; }
  .tn::after { content: '+'; margin-left: auto; font-family: var(--fh); font-size: 20px; line-height: 1; transition: transform .3s var(--ease); }
  .tr.open .tn::after { transform: rotate(45deg); }
  .tr:not(.open) .td:not(.sg) { display: none; }
  .td { display: grid; grid-template-columns: 74px 1fr; column-gap: 10px; padding: 9px 14px; border-left: 0; border-top: 1.5px dashed rgba(22, 22, 22, .12); font-size: 14px; }
  .td:nth-child(2) { border-top: 0; }
  .td::before { display: none; }
  .td::after { content: attr(data-e); order: -1; grid-row: 1 / span 2; align-self: start; justify-self: start; padding: 0 8px; border-radius: 8px; background: var(--ec); color: var(--ek); border: 2px solid var(--ink); font-size: 12px; font-weight: 800; line-height: 1.6; white-space: nowrap; }
  .td .tc { grid-column: 2; }
  .td .tp { top: 50%; bottom: auto; margin-top: -11px; right: 10px; }
  .td.playable { padding-right: 40px; }
  .tr:not(.open) .td.sg { border-top: 0; }
}
/* ---------- 手机 ---------- */
@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  .bar-in { padding: 10px 16px; }
  .brand { gap: 10px; }
  .brand img { width: 40px; }
  .brand .sys { padding-left: 10px; }
  .brand .sys b { font-size: 15px; }
  .brand.sm img { width: 36px; }
  .l1-in { padding: 0 16px 16px; }
  .l1-head { padding: 4px 0 14px; gap: 12px; }
  .l1-head h1 { font-size: 27px; }
  .pn-n.st { display: none; }   /* 一门课的条名字长，收起时不放数字，免得压到唱片 */
  .pn-n.st + .pn-ic { margin-left: auto; }
  .pn-v { min-width: 0; overflow: hidden; text-overflow: ellipsis; }
  .l1-stats { width: 100%; }
  .l1-stats span { flex: 1; flex-direction: column; align-items: center; gap: 0; padding: 6px 4px; font-size: 11.5px; }
  .l1-stats b { font-size: 20px; line-height: 1.25; }
  .sw a { font-size: 12.5px; padding: 0 8px 0 6px; gap: 5px; }
  .sw a i { width: 11px; height: 11px; }
  .bar-tt { display: none; }
  .bar.solid .brand { margin-left: auto; }
  .back { height: 40px; font-size: 13.5px; }
  .back svg { width: 27px; height: 27px; }
  .back span { max-width: 9em; }
  .l3 .wrap { padding-top: 20px; }
  .chead { gap: 14px; align-items: flex-start; }
  .ch-disc { width: 72px; margin-top: 4px; }
  .chead h1 { font-size: 29px; }
  .chead h1 small { display: block; margin: 4px 0 0; font-size: 16px; }
  .h2 { margin: 36px 0 14px; }
  .h2 h2 { font-size: 22px; padding-left: 34px; }
  .h2 h2::before { width: 24px; height: 24px; margin-top: -12px; }
  .cintro { padding: 18px; }
  .cintro .lead { font-size: 15px; }
  .cnt b { font-size: 36px; }
  .dtabs { gap: 6px; }
  .dtabs button { height: 40px; font-size: 14.5px; padding: 0 6px 0 12px; }
  .chead .chip { white-space: normal; height: auto; padding: 3px 11px; }
  .info { padding: 18px; gap: 18px; }
  .lessons { grid-template-columns: 1fr 1fr; gap: 10px; }
  .lessons.wide, .lessons.strips { grid-template-columns: 1fr; }
  .cal { grid-template-columns: 1fr; }
  .mon-h b { font-size: 34px; }
  .ls .tx b { font-size: 14px; }
  .dirs4, .blocks { grid-template-columns: 1fr 1fr; gap: 10px; }
  .dcol h4 { font-size: 16px; padding: 10px 12px; }
  .dcol li { padding: 8px 12px; }
  .dcol li span { font-size: 13.5px; }
  .blk-tx b { font-size: 16px; }
  .blk-p { right: 6px; top: 6px; font-size: 11.5px; }
  .steps { grid-template-columns: 1fr 1fr; }
  .wgrid { grid-template-columns: 1fr; gap: 12px; }
  .tracks { grid-template-columns: 1fr; gap: 10px; }
  .pgrid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .pcard b { font-size: 13px; padding: 7px 8px 0; }
  .pcard small { font-size: 11px; padding: 0 8px 8px; }
  .wc .bigplay, .pcard .bigplay { opacity: 1; transform: scale(.8); }
  .emb-box { height: 76vh; min-height: 480px; }
  .emb-bar { gap: 6px; padding: 0 8px 0 12px; }
  .emb-bar .dots, .ebtn span { display: none; }
  .ebtn { padding: 0; width: 34px; justify-content: center; }
  .topics { grid-template-columns: 1fr; }
  .pager a { min-width: 0; }
  .pbar { padding: 8px 10px; gap: 6px; }
  .pbar .tt b { font-size: 15px; }
  .pbtn { height: 34px; padding: 0 10px; font-size: 13px; }
  .pbtn .lbl { display: none; }
  .pbtn.x { width: 34px; }
  .pstage { padding: 0 8px 8px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }