@charset "UTF-8";
/* ============================================================
   Gustavusの小站 · 电脑端界面
   ------------------------------------------------------------
   可调参数集中在 :root 里，改数值即可微调手感。
   ============================================================ */

:root {
  /* 第一屏：滚轮互动带来的最大缩放（15%） */
  --hero-max-zoom: 0.15;
  /* 图片缩放、界面切换的平滑时长 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --hero-zoom-dur: 600ms;
  --screen-swap-dur: 820ms;

  /* 第二屏：按钮放大时长 + 淡化时长 */
  --chibi-expand-dur: 520ms;
  --chibi-fade-dur: 300ms;

  /* 配色 */
  --ink: #f2f5ff;
  --glass-line: rgba(255, 255, 255, 0.28);
  --accent: #8fd0ff;

  --font: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB",
          "Microsoft YaHei UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html,
body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #0a0c14;
  overscroll-behavior: none;
}

body {
  font-family: var(--font);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  user-select: none;
  cursor: default;
}

button { font-family: inherit; }

/* ============================== 舞台与屏幕 ============================== */

.stage {
  position: fixed;
  inset: 0;
  touch-action: none;   /* 手机上的上下滑动交给 JS 处理，禁止浏览器自己滚动/下拉刷新 */
}

.screen {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--screen-swap-dur) var(--ease),
    transform var(--screen-swap-dur) var(--ease),
    visibility 0s linear var(--screen-swap-dur),
    background-color 700ms ease;
}

.screen.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition:
    opacity var(--screen-swap-dur) var(--ease),
    transform var(--screen-swap-dur) var(--ease),
    visibility 0s linear 0s,
    background-color 700ms ease;
}

/* ============================== 第一屏 ============================== */

.screen--hero {
  background: #10131f;
  transform: scale(1.02);
}

.screen--hero.is-active { transform: scale(1); }

/* 离开第一屏时轻微推近，形成层次感 */
body.view-second .screen--hero { transform: scale(1.06); }

/* 缩放层：滚轮/滑动的 15% 缩放作用在整个背景层上 */
.hero-frame {
  position: absolute;
  inset: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #10131f;
  transform: scale(var(--hero-scale, 1));
  transition: transform var(--hero-zoom-dur) var(--ease);
  will-change: transform;
  backface-visibility: hidden;
}

/* 补边层：同一张壁纸的高斯模糊版，把整张图外面的留白填满 */
.hero-frame::before {
  content: "";
  position: absolute;
  inset: -10%;
  background-image: var(--hero-bg, none);
  background-position: center;
  background-size: cover;
  filter: blur(26px) brightness(0.55) saturate(1.15);
  transform: scale(1.06);
  animation: bgDrift 64s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes bgDrift {
  0%   { transform: scale(1.06) translate3d(0, 0, 0); }
  100% { transform: scale(1.15) translate3d(-1.6%, -2%, 0); }
}

/* 壁纸本体：等比缩放但要保证整张可见（contain），不再裁切 */
.hero-img {
  position: relative;
  z-index: 1;
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  flex: 0 0 auto;
  pointer-events: none;
  user-select: none;
}


/* 竖屏/窄屏时壁纸会完整显示成一条，加个圆角与投影，看起来像一张画框 */
@media (orientation: portrait) {
  .hero-img {
    border-radius: 14px;
    box-shadow: 0 18px 46px rgba(0, 0, 0, 0.38);
  }
}
/* 粒子层：不跟着缩放，保持清晰 */
.hero-fx {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.95;
  transform: translateZ(0);
}
.screen--hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 54%, rgba(8, 10, 24, 0.06) 0%, rgba(8, 10, 24, 0.34) 46%, rgba(6, 8, 20, 0.52) 100%);
}

/* 字幕框定位容器：竖直位置由 --note-y 控制（百分比是"中心点位置"） */
.hero-note {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.hero-note-slot {
  position: absolute;
  left: 50%;
  top: var(--note-y, 50%);
  transform: translate(-50%, -50%);
  /* 与 fitHeroNote() 的可用宽度（innerWidth - 24）保持一致，避免文字溢出胶囊 */
  max-width: calc(100vw - 24px);
  pointer-events: none;
  transition: top 340ms var(--ease);
}

/* 三档位置：
   · 壁纸铺满整屏        -> 正中 50%
   · 占比 ≥80%（轻微留边）-> 上下三等分，离底部一份的位置 66.7%
   · 占比 <80%（明显留边）-> 离底部约 1/4 的位置 75% */
.screen--hero.is-near-full { --note-y: 66.7%; }
.screen--hero.is-letterboxed { --note-y: 75%; }

.hero-note-pill {
  /* 现在是 <button>：可点击，默认显示，点一下淡出、再点一下显现 */
  display: inline-block;
  /* 内边距用 em：缩字号时左右留白同步缩小，保证始终能塞进约 1 个字符 */
  --note-ls: 0.14em;            /* 字距；窄屏由媒体查询收紧 */
  /* 右侧再扣掉末字后多出来的那点字距，左右看起来才一样宽 */
  padding: 0.64em calc(1em - var(--note-ls)) 0.64em 1em;
  border-radius: 999px;
  font-family: inherit;
  /* 兜底字号（JS 会按实际宽度再精调 --note-font） */
  font-size: var(--note-font, clamp(13px, 5.2vw, 27px));
  white-space: nowrap;          /* 永远单行，不换行 */
  max-width: 100%;
  font-weight: 500;
  letter-spacing: var(--note-ls);
  line-height: 1.2;
  color: #fdfdff;
  background: rgba(24, 30, 56, 0.26);
  border: 1px solid rgba(255, 255, 255, 0.34);
  box-shadow:
    0 18px 50px rgba(8, 12, 34, 0.42),
    inset 0 1px 0 rgba(255, 255, 255, 0.42),
    0 0 34px rgba(150, 195, 255, 0.28);
  backdrop-filter: blur(12px) saturate(135%);
  -webkit-backdrop-filter: blur(12px) saturate(135%);
  text-shadow: 0 2px 16px rgba(120, 170, 255, 0.6);
  cursor: pointer;
  pointer-events: auto;              /* 外层 .hero-note 是 none，这里单独放开 */
  -webkit-appearance: none;
  appearance: none;
  animation: pillFloat 5.5s var(--ease) infinite;
  transition: opacity 320ms var(--ease), filter 320ms var(--ease);
}

.hero-note-pill:hover { filter: brightness(1.12); }

/* 淡出后仍保留点击区域，再点一下就会重新显现 */
.hero-note-pill.is-hidden {
  opacity: 0;
  animation-play-state: paused;
}

@keyframes pillFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-7px); }
}

/* 向下切换按钮（滚轮下滚后出现） */
.scroll-next-wrap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4.2vh;
  display: flex;
  justify-content: center;
  z-index: 2;
  pointer-events: none;
}

.scroll-next {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  padding: 0;
  color: #ffffff;
  border-radius: 50%;
  cursor: pointer;
  pointer-events: none;
  opacity: 0;
  background: rgba(20, 26, 48, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.42);
  box-shadow:
    0 14px 36px rgba(6, 10, 28, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    0 0 26px rgba(160, 205, 255, 0.3);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  transform: translateY(26px) scale(0.82);
  transition:
    opacity 520ms var(--ease),
    transform 520ms var(--ease),
    background-color 320ms ease,
    box-shadow 320ms ease;
}

.scroll-next.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.scroll-next:hover {
  background: rgba(52, 74, 128, 0.46);
  transform: translateY(-3px) scale(1.06);
  box-shadow:
    0 20px 44px rgba(6, 10, 28, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.6),
    0 0 34px rgba(170, 215, 255, 0.5);
}

.scroll-next:active { transform: translateY(-1px) scale(0.98); }

.scroll-next .chevron {
  width: 26px;
  height: 26px;
  filter: drop-shadow(0 2px 8px rgba(120, 170, 255, 0.7));
  animation: chevBob 2.1s var(--ease) infinite;
}

@keyframes chevBob {
  0%, 100% { transform: translateY(-2px); opacity: 0.9; }
  50%      { transform: translateY(4px); opacity: 1; }
}

/* ============================== 第二屏 ============================== */

.screen--second {
  background-color: #9cc9e3;
}
.chibi-wrap {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 1;
}

.chibi-btn {
  position: relative;
  width: clamp(118px, 12vw, 172px);
  aspect-ratio: 1 / 1;
  padding: 0;
  border: 0;
  border-radius: 30%;
  overflow: hidden;
  cursor: pointer;
  background: #ffffff;
  box-shadow:
    0 22px 60px rgba(0, 0, 0, 0.42),
    0 0 0 1px rgba(255, 255, 255, 0.35) inset,
    0 0 40px rgba(255, 255, 255, 0.16);
  transform: scale(calc(var(--chibi-scale, 1) * var(--chibi-hover, 1)));
  opacity: 1;
  transition:
    transform var(--chibi-expand-dur) var(--ease),
    border-radius var(--chibi-expand-dur) var(--ease),
    opacity var(--chibi-fade-dur) linear,
    box-shadow 380ms ease;
  will-change: transform, opacity;
}

.chibi-btn .chibi-src {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

/* 去白底的版本：平时不显示，放大时才顶上，白色背景就不会糊一大片 */
.chibi-src--cut {
  opacity: 0;
  transition: opacity 140ms linear;
}

.chibi-btn.is-bursting { background: transparent; }
.chibi-btn.is-bursting .chibi-src--solid { opacity: 0; }
.chibi-btn.is-bursting .chibi-src--cut { opacity: 1; }

.chibi-btn:hover { --chibi-hover: 1.045; }
.chibi-btn:active { --chibi-hover: 0.965; }

/* ---------------- 返回第一屏的“向上”按钮 ---------------- */
.scroll-back-wrap {
  position: absolute;
  left: 0;
  right: 0;
  top: 4.2vh;
  display: flex;
  justify-content: center;
  z-index: 3;
  pointer-events: none;
  transform: translateY(0);
  transition: transform 420ms var(--ease);
}

/* 抬头显示出现时整体下移，避免和标题叠在一起 */
body.hud-on .scroll-back-wrap { transform: translateY(44px); }

.scroll-back {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  padding: 0;
  color: #ffffff;
  border-radius: 50%;
  cursor: pointer;
  pointer-events: none;
  opacity: 0;
  background: rgba(16, 22, 40, 0.42);
  border: 1px solid rgba(255, 255, 255, 0.42);
  box-shadow:
    0 14px 36px rgba(6, 10, 28, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    0 0 26px rgba(160, 205, 255, 0.3);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  transform: translateY(-18px) scale(0.86);
  transition:
    opacity 300ms var(--ease),
    transform 300ms var(--ease),
    background-color 320ms ease,
    box-shadow 320ms ease;
}

/* 默认隐藏，由 JS 按滚动/边缘悬停加 is-visible */
.scroll-back.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.scroll-back:hover {
  background: rgba(52, 74, 128, 0.46);
  transform: translateY(3px) scale(1.06);
  box-shadow:
    0 20px 44px rgba(6, 10, 28, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.6),
    0 0 34px rgba(170, 215, 255, 0.5);
}

.scroll-back:active { transform: translateY(1px) scale(0.98); }

.scroll-back .chevron {
  width: 26px;
  height: 26px;
  filter: drop-shadow(0 2px 8px rgba(120, 170, 255, 0.7));
  animation: chevBobUp 2.1s var(--ease) infinite;
}

@keyframes chevBobUp {
  0%, 100% { transform: translateY(2px); opacity: 0.9; }
  50%      { transform: translateY(-4px); opacity: 1; }
}

/* ============================== 抬头显示（顶部细长条） ============================== */

.hud {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  transform: translate3d(0, -100%, 0);
  opacity: 0;
  pointer-events: none;
  transition:
    transform 360ms var(--ease),
    opacity 240ms linear;
  will-change: transform, opacity;
}

.hud.is-visible {
  transform: translate3d(0, 0, 0);
  opacity: 1;
  pointer-events: auto;
}

/* 覆盖整个上边宽的一条，很薄 */
.hud-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 34px;
  padding: 0 16px;
  background: linear-gradient(180deg, rgba(8, 11, 20, 0.82) 0%, rgba(8, 11, 20, 0.56) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}

.hud-title {
  padding: 0;
  padding: 0;
  border: 0;
  background: none;
  color: #ffffff;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  white-space: nowrap;
  cursor: pointer;
  text-shadow: 0 2px 14px rgba(120, 170, 255, 0.55);
  transition: color 240ms ease, text-shadow 240ms ease;
}

.hud-title:hover { color: var(--accent); }

/* ============================== 音乐播放器 ============================== */

.player {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 30;
  width: 328px;
  padding: 16px 18px 14px;
  border-radius: 20px;
  background: rgba(13, 16, 27, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow:
    0 22px 60px rgba(0, 0, 0, 0.48),
    inset 0 1px 0 rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  color: #eef2ff;
  transition: box-shadow 220ms ease, background-color 220ms ease;
  transition: box-shadow 220ms ease, background-color 220ms ease;
}

.player-head {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  touch-action: none;   /* 触摸拖动由 JS 处理，别让浏览器抢手势 */
}

/* 播放器可拖动：按住标题区（或面板空白处）拖动 */
.player-head {
  cursor: grab;
}

.player.is-dragging {
  cursor: grabbing;
  background: rgba(16, 20, 34, 0.72);
  box-shadow:
    0 30px 74px rgba(0, 0, 0, 0.58),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.player.is-dragging .player-head { cursor: grabbing; }

.player-meta { flex: 1 1 auto; min-width: 0; }

.player-title {
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-sub {
  margin-top: 3px;
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: rgba(226, 234, 255, 0.62);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-menu {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  padding: 0;
  color: rgba(232, 240, 255, 0.85);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 9px;
  cursor: pointer;
  transition: background-color 220ms ease, color 220ms ease;
}

.player-menu svg { width: 16px; height: 16px; }

.player-menu:hover { background: rgba(255, 255, 255, 0.16); color: #fff; }
.player-menu[aria-expanded="true"] { color: #0f1424; background: var(--accent); }

/* 进度条 */
.player-progress {
  position: relative;
  height: 4px;
  margin: 14px 0 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  cursor: pointer;
  outline: none;
}

.player-progress:focus-visible { box-shadow: 0 0 0 2px rgba(143, 208, 255, 0.5); }

.player-progress-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, #7fc4ff, #b7a4ff);
  box-shadow: 0 0 12px rgba(140, 190, 255, 0.7);
  transition: width 120ms linear;
}
/* 进度条上黄色发光小点：跟着"已播放"那一段的右端走 */
.player-progress-fill::after {
  content: "";
  position: absolute;
  right: -3.5px;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border-radius: 50%;
  background: #ffd54a;
  box-shadow:
    0 0 6px rgba(255, 213, 74, 0.95),
    0 0 14px rgba(255, 184, 20, 0.65);
  pointer-events: none;
  animation: barTipGlow 2.4s ease-in-out infinite;
}

@keyframes barTipGlow {
  0%, 100% { opacity: 0.72; transform: scale(0.9); }
  50%      { opacity: 1;    transform: scale(1.18); }
}

.player-times {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  letter-spacing: 0.03em;
  color: rgba(226, 234, 255, 0.55);
  font-variant-numeric: tabular-nums;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}

.player-btn {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  padding: 0;
  color: #eaf1ff;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 220ms ease, transform 220ms var(--ease), color 220ms ease;
}

.player-btn svg { width: 16px; height: 16px; }

.player-btn:hover { background: rgba(255, 255, 255, 0.18); }
.player-btn:active { transform: scale(0.92); }

.player-btn--play {
  width: 42px;
  height: 42px;
  color: #0b1020;
  background: linear-gradient(160deg, #a8d8ff, #cfc3ff);
  border: 0;
  box-shadow: 0 8px 22px rgba(120, 180, 255, 0.38);
}

.player-btn--play:hover { background: linear-gradient(160deg, #bce0ff, #dcd2ff); }
.player-btn--play svg { width: 18px; height: 18px; }

/* 播放/暂停图标切换 */
.icon-pause { display: none; }
.player.is-playing .icon-play { display: none; }
.player.is-playing .icon-pause { display: block; }

/* 音量 */
.player-vol {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.player-btn--small { width: 28px; height: 28px; border: 0; background: none; }
.player-btn--small:hover { background: rgba(255, 255, 255, 0.12); }
.player-btn--small svg { width: 15px; height: 15px; }

.icon-mute { display: none; }
.player.is-muted .icon-vol { display: none; }
.player.is-muted .icon-mute { display: block; }

.player-range {
  -webkit-appearance: none;
  appearance: none;
  width: 82px;
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  outline: none;
  cursor: pointer;
}

.player-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #dfe9ff;
  box-shadow: 0 0 8px rgba(150, 200, 255, 0.8);
  transition: transform 160ms ease;
}

.player-range::-webkit-slider-thumb:hover { transform: scale(1.15); }

.player-range::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border: 0;
  border-radius: 50%;
  background: #dfe9ff;
}

/* 歌曲列表 */
/* 歌曲列表：浮层，显示在卡片上方或下方（方向与最大高度由 JS 按空间决定） */
.player-list {
  position: absolute;
  left: 0;
  right: 0;
  z-index: 2;
  padding: 8px;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  border-radius: 16px;
  background: rgba(11, 14, 24, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow:
    0 18px 44px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.28) transparent;
  animation: listInDown 180ms var(--ease);
}

.player-list.is-up { animation-name: listInUp; }

@keyframes listInDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes listInUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.player-list[hidden] { display: none; }

.player-list::-webkit-scrollbar { width: 6px; }
.player-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.26);
  border-radius: 999px;
}

.player-list-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  padding: 8px 10px;
  border: 0;
  border-radius: 10px;
  background: none;
  color: rgba(232, 240, 255, 0.82);
  font-size: 12.5px;
  text-align: left;
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease;
}

.player-list-item:hover { background: rgba(255, 255, 255, 0.09); color: #fff; }

.player-list-item .idx {
  flex: 0 0 22px;
  font-size: 10.5px;
  color: rgba(226, 234, 255, 0.42);
  font-variant-numeric: tabular-nums;
}

.player-list-item .name {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.player-list-item.is-current {
  background: rgba(143, 208, 255, 0.16);
  color: #ffffff;
}

.player-list-item.is-current .idx { color: var(--accent); }

/* ============================== 收起后的悬浮球 ============================== */

.player.is-hidden { display: none; }

.player-ball {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 31;
  width: 54px;
  height: 54px;
  display: none;
  place-items: center;
  padding: 0;
  color: #eaf1ff;
  border-radius: 50%;
  cursor: grab;
  touch-action: none;
  background: rgba(13, 16, 27, 0.74);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow:
    0 14px 34px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  transition: transform 200ms var(--ease), background-color 200ms ease, box-shadow 200ms ease;
}

.player-ball.is-visible { display: grid; }
.player-ball svg { width: 22px; height: 22px; pointer-events: none; }
.player-ball:hover { transform: scale(1.06); }

.player-ball.is-dragging {
  cursor: grabbing;
  transform: scale(1.03);
  box-shadow:
    0 20px 44px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.24);
}

/* 播放中的呼吸光圈 */
.player-ball::after {
  content: "";
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 2px solid rgba(143, 208, 255, 0.8);
  opacity: 0;
  pointer-events: none;
}

.player-ball.is-playing::after {
  animation: ballPulse 1.9s ease-out infinite;
}

@keyframes ballPulse {
  0%   { transform: scale(0.85); opacity: 0.75; }
  100% { transform: scale(1.28); opacity: 0; }
}

/* ============================== 响应式（窄屏兜底） ============================== */

@media (max-width: 860px) {
  .player { right: 12px; bottom: 12px; left: 12px; width: auto; }
  .player-ball { right: 16px; bottom: 16px; }
  .player-list { max-height: 46vh; }
  /* 手机上只收紧字距；字号与左右内边距交给 fitHeroNote() 按宽度自适应 */
  .hero-note-pill {
    --note-ls: 0.08em;
    padding-top: 0.7em;
    padding-bottom: 0.7em;
  }
  .scroll-next,
  .scroll-back { width: 54px; height: 54px; }
  .scroll-next .chevron,
  .scroll-back .chevron { width: 22px; height: 22px; }
  .hud-inner { height: 32px; gap: 8px; padding: 0 12px; }
  .hud-title { font-size: 12.5px; letter-spacing: 0.14em; }
  .player-range { width: 64px; }
  /* 手机上背景模糊很吃 GPU：统一降一档，动画更顺 */
  .player,
  .hud-inner,
  .scroll-next,
  .scroll-back,
  .hero-note-pill,
  .player-ball {
    backdrop-filter: blur(8px) saturate(130%);
    -webkit-backdrop-filter: blur(8px) saturate(130%);
  }
}

/* 横屏手机（高度很小）时，把第二屏按钮再收一点，避免和播放器挤在一起 */
@media (max-height: 520px) and (max-width: 980px) {
  .chibi-btn { width: clamp(88px, 14vh, 132px); }
  .scroll-next-wrap { bottom: 2vh; }
}

/* 尊重“减少动态”偏好 */
@media (prefers-reduced-motion: reduce) {
  .hero-frame::before { animation: none; }
  .hero-fx { display: none; }
  .hero-note-pill,
  .scroll-next .chevron,
  .scroll-back .chevron,
  .player-progress::after,
  .player-ball.is-playing::after { animation: none; }
}