:root {
  color-scheme: dark;
  --ink: #f5f6f2;
  --muted: #a4a9a4;
  --lime: #d5ff75;
  --glass: rgba(17, 20, 20, .68);
  --line: rgba(255, 255, 255, .11);
  --viewport-height: 100vh;
}
@supports (height: 100dvh) { :root { --viewport-height: 100dvh; } }

* { box-sizing: border-box; }
html, body { margin: 0; width: 100%; height: 100%; overflow: hidden; background: #090b0d; color: var(--ink); font-family: "Segoe UI", "Noto Sans SC", system-ui, sans-serif; }
body { overscroll-behavior: none; }
button { color: inherit; font: inherit; -webkit-tap-highlight-color: transparent; }
.feed { position: relative; z-index: 0; width: 100%; height: var(--viewport-height); overflow-y: auto; -webkit-overflow-scrolling: touch; overscroll-behavior-y: contain; scroll-snap-type: y mandatory; scrollbar-width: none; touch-action: pan-y; }
.feed::-webkit-scrollbar { display: none; }
.card { position: relative; width: 100%; height: var(--viewport-height); contain: layout paint; scroll-snap-align: start; scroll-snap-stop: normal; background: radial-gradient(ellipse at 52% 38%, #242c30 0, #111619 42%, #080a0b 100%); overflow: hidden; }
.card video { width: 100%; height: 100%; object-fit: contain; background: transparent; display: block; }
.single-player { position: fixed; inset: 0; z-index: 1; width: 100%; height: 100%; object-fit: contain; background: transparent; pointer-events: none; }
.single-player.mode-hidden { display: none; }
.card.video-error::before { content: "暂时无法播放 · 上滑继续"; position: absolute; z-index: 2; inset: 0; display: grid; place-items: center; color: rgba(255,255,255,.78); font-size: 14px; }
.card-retry { display: none; position: absolute; z-index: 4; top: calc(50% + 34px); left: 50%; transform: translateX(-50%); padding: 10px 16px; border: 1px solid rgba(255,255,255,.2); border-radius: 999px; color: #11150d; background: var(--lime); box-shadow: 0 8px 28px #0005; font-size: 13px; font-weight: 650; cursor: pointer; }
.card-retry:active { transform: translateX(-50%) scale(.96); }
.card.video-error .card-retry { display: block; }
.card.loading-video { background: radial-gradient(ellipse at 52% 38%, #303a3b 0, #141a1b 42%, #080a0b 100%); }
.card.card-content-unloaded { background: #090b0d; }
.card.card-content-unloaded::before, .card.card-content-unloaded::after { display: none; }
.card.loading-video::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(140deg, rgba(255,255,255,.055), transparent 48%, rgba(0,0,0,.18)); pointer-events: none; }
.card > .video-loading { display: none; position: absolute; inset: 0; z-index: 2; place-items: center; pointer-events: none; }
.card.loading-video > .video-loading { display: grid; }
.video-loading span { width: 34px; height: 34px; border: 2px solid rgba(255,255,255,.2); border-top-color: var(--lime); border-radius: 50%; animation: spin .8s linear infinite; box-shadow: 0 0 28px #d5ff7530; }
.video-error video { opacity: .35; }
@keyframes spin { to { transform: rotate(360deg); } }
.card::after { content: ""; position: absolute; inset: 42% 0 0; pointer-events: none; background: linear-gradient(transparent, rgba(0,0,0,.68)); }
.meta { position: absolute; z-index: 2; left: max(22px, calc((100vw - 620px)/2)); right: max(28px, calc((100vw - 620px)/2)); bottom: max(106px, calc(env(safe-area-inset-bottom) + 92px)); text-shadow: 0 2px 14px #000b; }
.title { max-width: 620px; margin: 0; font-size: clamp(18px, 2.3vw, 24px); font-weight: 600; line-height: 1.5; letter-spacing: .01em; }

.topbar { position: fixed; z-index: 11; top: max(18px, env(safe-area-inset-top)); left: 20px; right: 20px; display: flex; align-items: center; justify-content: space-between; pointer-events: none; opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity .24s ease, transform .24s ease, visibility .24s; }
.ui-visible .topbar { opacity: 1; visibility: visible; transform: translateY(0); }
.brand-mark, .top-actions { pointer-events: auto; }
.brand-mark { display: flex; align-items: center; gap: 10px; padding: 8px 13px 8px 9px; border: 1px solid var(--line); border-radius: 15px; background: var(--glass); backdrop-filter: blur(18px); box-shadow: 0 8px 30px #0002; }
.brand-icon { display: grid; width: 34px; height: 34px; place-items: center; padding-left: 2px; border-radius: 11px; color: #10140c; background: var(--lime); font-size: 12px; box-shadow: 0 0 20px #d5ff7530; }
.brand-mark b { display: block; font-size: 13px; line-height: 1.1; letter-spacing: .08em; }
.brand-mark small { display: block; margin-top: 4px; color: var(--muted); font-size: 8px; letter-spacing: .19em; }
.top-actions { display: flex; align-items: center; gap: 8px; }
.icon-button, .review-toggle, .sound-toggle { min-height: 42px; border: 1px solid var(--line); background: var(--glass); backdrop-filter: blur(18px); box-shadow: 0 8px 30px #0002; cursor: pointer; transition: background .18s, border-color .18s, transform .18s; }
.icon-button:hover, .review-toggle:hover, .sound-toggle:hover { border-color: #ffffff30; background: rgba(35, 40, 38, .82); }
.icon-button:active, .review-toggle:active, .sound-toggle:active { transform: scale(.96); }
.icon-button { display: grid; width: 42px; place-items: center; border-radius: 14px; font-size: 20px; color: #e2e6dc; }
.review-toggle { display: flex; align-items: center; gap: 8px; padding: 0 13px; border-radius: 14px; font-size: 12px; font-weight: 600; }
.review-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 10px #d5ff7580; }
.review-count { display: inline-grid; min-width: 20px; height: 20px; padding: 0 5px; place-items: center; border-radius: 7px; color: #c8cdc5; background: #ffffff12; font-size: 11px; }
.sound-toggle { display: flex; align-items: center; gap: 7px; min-width: 82px; justify-content: center; padding: 0 12px; border-radius: 14px; font-size: 12px; font-weight: 600; }
.sound-glyph { color: var(--lime); font-size: 16px; }

.player-controls { position: fixed; z-index: 9; left: max(20px, calc((100vw - 680px)/2)); right: max(20px, calc((100vw - 680px)/2)); bottom: max(34px, calc(env(safe-area-inset-bottom) + 20px)); display: flex; align-items: center; gap: 12px; min-height: 58px; padding: 10px 14px; border: 1px solid rgba(255,255,255,.13); border-radius: 19px; color: #fff; background: rgba(15,18,18,.76); backdrop-filter: blur(22px) saturate(145%); box-shadow: 0 16px 55px #0005, inset 0 1px #ffffff0a; font: 11px system-ui, sans-serif; opacity: 0; visibility: hidden; transform: translateY(10px); transition: opacity .24s ease, transform .24s ease, visibility .24s; }
.ui-visible .player-controls { opacity: 1; visibility: visible; transform: translateY(0); }
.player-controls button { display: grid; flex: 0 0 auto; min-width: 36px; height: 36px; place-items: center; border: 0; border-radius: 12px; color: #edf0e8; background: transparent; cursor: pointer; }
.player-controls button:hover { background: #ffffff12; }
.player-controls .play-button { color: #11150d; background: var(--lime); box-shadow: 0 2px 18px #d5ff7530; font-size: 13px; }
.player-controls span { min-width: 33px; color: #b9beb5; font-variant-numeric: tabular-nums; text-align: center; }
.player-controls input[type="range"] { height: 24px; margin: 0; border-radius: 99px; accent-color: var(--lime); cursor: pointer; touch-action: pan-x; }
.player-controls input#seek-bar { flex: 1; min-width: 36px; }
.player-controls input#volume-bar { flex: 0 1 78px; min-width: 44px; }
.speed-indicator { position: fixed; z-index: 8; left: 50%; top: 50%; transform: translate(-50%,-50%); padding: 12px 19px; border: 1px solid #ffffff20; border-radius: 999px; background: rgba(12,15,13,.78); color: var(--lime); font-weight: 700; box-shadow: 0 12px 36px #0005; pointer-events: none; backdrop-filter: blur(14px); }
.hint { position: fixed; z-index: 5; left: 0; right: 0; bottom: max(10px, env(safe-area-inset-bottom)); display: flex; align-items: center; justify-content: center; gap: 10px; color: #ffffff80; font-size: 10px; letter-spacing: .04em; pointer-events: none; transition: opacity .2s; }
.hint i { width: 3px; height: 3px; border-radius: 50%; background: #d5ff7580; }
.hint-key { display: grid; width: 18px; height: 18px; place-items: center; border: 1px solid #ffffff2a; border-radius: 6px; color: #ffffffbd; font-size: 10px; }
.hint { opacity: 0; visibility: hidden; transform: translateY(7px); transition: opacity .24s ease, transform .24s ease, visibility .24s; }
.ui-visible .hint { opacity: 1; visibility: visible; transform: translateY(0); }

.review-panel { position: fixed; z-index: 15; top: 0; right: 0; bottom: 0; width: min(470px, 100vw); overflow: auto; padding: max(28px, env(safe-area-inset-top)) 24px max(24px, env(safe-area-inset-bottom)); border-left: 1px solid #ffffff14; color: var(--ink); background: rgba(14,17,17,.96); box-shadow: -24px 0 80px #0007; backdrop-filter: blur(24px); animation: drawer-in .24s ease both; }
@keyframes drawer-in { from { transform: translateX(18px); opacity: .75; } to { transform: translateX(0); opacity: 1; } }
.review-panel header { display: flex; justify-content: space-between; align-items: center; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.review-panel header strong { font-size: 17px; letter-spacing: .01em; }
.review-panel header button { display: grid; width: 36px; height: 36px; place-items: center; border: 1px solid var(--line); border-radius: 12px; color: #fff; background: #ffffff0a; font-size: 22px; cursor: pointer; }
.review-help, .review-item p, .review-empty { color: var(--muted); font-size: 12px; line-height: 1.65; }
.review-help { margin: 15px 0 20px; }
.review-item { padding: 16px 0; border-top: 1px solid var(--line); }
.review-item strong { font-size: 13px; line-height: 1.5; }
.review-item p { margin: 6px 0 12px; }
.review-diagnostics { margin: 0 0 12px; color: var(--muted); font-size: 11px; }
.review-diagnostics summary { width: fit-content; cursor: pointer; }
.review-diagnostics pre { max-height: 180px; overflow: auto; margin: 8px 0 0; padding: 10px; border-radius: 10px; color: #d8f3dc; background: #0005; font: 10px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
.review-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.review-actions button { padding: 9px 12px; border: 1px solid var(--line); border-radius: 10px; color: #e7eae3; background: #ffffff0a; font-size: 11px; cursor: pointer; }
.review-actions button:first-child { border-color: #d5ff7540; color: var(--lime); background: #d5ff750d; }
.review-actions button:hover { background: #ffffff16; }
.review-actions button:disabled { opacity: .45; cursor: wait; }
.diagnostics { position: fixed; z-index: 16; left: 16px; right: 16px; top: max(76px, calc(env(safe-area-inset-top) + 64px)); max-height: 42vh; overflow: auto; padding: 16px; border: 1px solid var(--line); border-radius: 16px; background: rgba(8,10,10,.94); color: #d8f3dc; box-shadow: 0 15px 55px #0007; font: 11px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
.status { position: fixed; inset: 0; z-index: 20; display: grid; place-items: center; padding: 24px; text-align: center; background: #090b0d; color: #ddd; }
.list-status { position: fixed; z-index: 21; left: 14px; right: 14px; bottom: max(92px, calc(env(safe-area-inset-bottom) + 82px)); display: flex; align-items: center; justify-content: space-between; gap: 14px; max-width: 620px; margin: 0 auto; padding: 11px 13px; border: 1px solid #ffffff20; border-radius: 14px; color: #f5f6f2; background: rgba(17,20,20,.94); box-shadow: 0 8px 28px #0007; font-size: 12px; line-height: 1.45; }
.list-status button { flex: 0 0 auto; padding: 8px 11px; border: 1px solid #d5ff7560; border-radius: 10px; color: #11150d; background: var(--lime); font-weight: 650; cursor: pointer; }
.list-status button:disabled { opacity: .6; cursor: wait; }
.hidden { display: none !important; }

@media (max-width: 600px) {
  .topbar { top: max(12px, env(safe-area-inset-top)); left: 12px; right: 12px; }
  .brand-mark, .icon-button, .review-toggle, .sound-toggle { backdrop-filter: blur(10px); }
  .player-controls { backdrop-filter: blur(12px); }
  .review-panel, .speed-indicator { backdrop-filter: none; }
  .brand-mark { gap: 8px; padding: 6px 10px 6px 6px; border-radius: 13px; }
  .brand-icon { width: 31px; height: 31px; border-radius: 10px; }
  .brand-mark b { font-size: 12px; }
  .brand-mark small { font-size: 7px; }
  .top-actions { gap: 6px; }
  .icon-button { width: 38px; min-height: 38px; border-radius: 12px; }
  .review-toggle { min-height: 38px; gap: 6px; padding: 0 9px; border-radius: 12px; font-size: 11px; }
  .sound-toggle { min-width: 38px; min-height: 38px; width: 38px; padding: 0; border-radius: 12px; }
  .sound-label { display: none; }
  .meta { left: 18px; right: 66px; bottom: max(112px, calc(env(safe-area-inset-bottom) + 100px)); }
  .title { font-size: 17px; }
  .player-controls { left: 10px; right: 10px; bottom: max(36px, calc(env(safe-area-inset-bottom) + 20px)); gap: 7px; min-height: 52px; padding: 7px 9px; border-radius: 16px; }
  .player-controls button { min-width: 32px; height: 34px; }
  .player-controls .play-button { min-width: 34px; }
  .player-controls input#volume-bar { display: none; }
  .hint { gap: 7px; font-size: 9px; }
}

@media (min-width: 900px) {
  .meta { left: calc(50% - 310px); right: calc(50% - 310px); }
  .topbar { left: 28px; right: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .video-loading span { animation: none; }
  .review-panel { animation: none; }
}