/* 回声 · X 视频学英语。和本地会议库（web/style.css）同一套色板，但完全独立，site/ 整个目录可以单独部署。 */
:root {
  color-scheme: light;
  --bg:#f5f6f3; --surface:#ffffff; --surface-soft:#f0f2ee; --surface-hover:#e9ede7;
  --text:#202d28; --text-secondary:#58655e; --text-muted:#606e64; --line:#dce2da; --line-strong:#78877d;
  --accent:#23694b; --accent-hover:#19543b; --accent-soft:#e5efe6; --accent-text:#205e43; --on-accent:#ffffff;
  --mark:#f3e7b8; --mark-text:#4a3d0c;
  --success:#286342; --success-soft:#e7f1e7; --danger:#a73535; --danger-soft:#faeaea;
  --neutral:#58615c; --neutral-soft:#ecefeb; --focus:#287954; --video-bg:#111815; --video-text:#f1f5f1;
  --shadow:0 4px 24px #23382906; --shadow-raised:0 8px 28px #2338290d;
  --radius-sm:6px; --radius-md:10px; --radius-lg:16px; --radius-pill:999px;
  --header-h:68px;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme:dark;
    --bg:#131a16; --surface:#1b241e; --surface-soft:#222d25; --surface-hover:#2c382e;
    --text:#e8eee6; --text-secondary:#b1beb1; --text-muted:#9caa9e; --line:#354238; --line-strong:#748a79;
    --accent:#9bc99f; --accent-hover:#b5dcb7; --accent-soft:#2b4031; --accent-text:#b2dcb4; --on-accent:#17291d;
    --mark:#4a4220; --mark-text:#f5e9b8;
    --success:#abd5aa; --success-soft:#293c2d; --danger:#ffaaaa; --danger-soft:#42282a;
    --neutral:#b4beb4; --neutral-soft:#2b352e; --focus:#b9e4bc; --video-bg:#0c110e; --video-text:#f1f5f1;
    --shadow:0 4px 24px #00000016; --shadow-raised:0 8px 28px #00000028;
  }
}
:root[data-theme="dark"] {
  color-scheme:dark;
  --bg:#131a16; --surface:#1b241e; --surface-soft:#222d25; --surface-hover:#2c382e;
  --text:#e8eee6; --text-secondary:#b1beb1; --text-muted:#9caa9e; --line:#354238; --line-strong:#748a79;
  --accent:#9bc99f; --accent-hover:#b5dcb7; --accent-soft:#2b4031; --accent-text:#b2dcb4; --on-accent:#17291d;
  --mark:#4a4220; --mark-text:#f5e9b8;
  --success:#abd5aa; --success-soft:#293c2d; --danger:#ffaaaa; --danger-soft:#42282a;
  --neutral:#b4beb4; --neutral-soft:#2b352e; --focus:#b9e4bc; --video-bg:#0c110e; --video-text:#f1f5f1;
  --shadow:0 4px 24px #00000016; --shadow-raised:0 8px 28px #00000028;
}
/* 黑色：深色的再暗一档，接近纯黑 */
:root[data-theme="black"] {
  color-scheme:dark;
  --bg:#0d0f0e; --surface:#161918; --surface-soft:#1d2120; --surface-hover:#262b29;
  --text:#e8eee6; --text-secondary:#b1beb1; --text-muted:#9caa9e; --line:#2c3230; --line-strong:#6b7a71;
  --accent:#9bc99f; --accent-hover:#b5dcb7; --accent-soft:#22352a; --accent-text:#b2dcb4; --on-accent:#17291d;
  --mark:#4a4220; --mark-text:#f5e9b8;
  --success:#abd5aa; --success-soft:#20322a; --danger:#ffaaaa; --danger-soft:#42282a;
  --neutral:#b4beb4; --neutral-soft:#242a27; --focus:#b9e4bc; --video-bg:#000000; --video-text:#f1f5f1;
  --shadow:0 4px 24px #00000016; --shadow-raised:0 8px 28px #00000028;
}

* {box-sizing:border-box}
[hidden] {display:none !important}
html {background:var(--bg)}
body {margin:0;background:var(--bg);color:var(--text);font:14px/1.65 var(--font-sans);-webkit-font-smoothing:antialiased}
a {color:inherit;text-decoration:none}
button,select {font:inherit;color:inherit}
button {cursor:pointer;background:none;border:0;padding:0}
button:disabled {cursor:not-allowed;opacity:.45}
:focus-visible {outline:2px solid var(--focus);outline-offset:2px;border-radius:4px}
h1,h2,h3,p {margin:0}
svg {flex-shrink:0}
.mono {font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.skip-link {position:fixed;left:16px;top:-80px;z-index:40;padding:10px 18px;background:var(--accent);color:var(--on-accent);border-radius:8px}
.skip-link:focus {top:12px}

/* header */
.site-header {position:sticky;top:0;z-index:20;height:var(--header-h);border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(10px)}
.header-inner {max-width:1280px;height:100%;margin:auto;padding:0 32px;display:flex;align-items:center;gap:32px}
.brand {display:flex;gap:11px;align-items:center}
.brand-mark {display:grid;place-items:center;width:36px;height:36px;background:var(--accent);color:var(--on-accent);border-radius:11px}
.brand-mark svg {width:21px;height:21px}
.brand-name {font-size:19px;font-weight:700;letter-spacing:.08em}
.brand-caption {display:block;color:var(--text-muted);font-size:10px;letter-spacing:.05em;line-height:1.3}
.main-nav {display:flex;gap:4px}
.nav-link {padding:8px 14px;border-radius:var(--radius-md);color:var(--text-secondary);font-weight:550}
.nav-link:hover {background:var(--surface-soft)}
.nav-link[aria-current="page"] {background:var(--accent-soft);color:var(--accent-text)}
.theme-toggle {margin-left:auto;width:36px;height:36px;display:grid;place-items:center;border-radius:var(--radius-pill);color:var(--text-secondary)}
.theme-toggle:hover {background:var(--surface-hover);color:var(--text)}
.theme-toggle svg {width:19px;height:19px}
.account {position:relative;flex:none}
.account-btn {display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 12px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);color:var(--text);font-size:13px;font-weight:550;cursor:pointer;list-style:none}
.account-btn::-webkit-details-marker {display:none}
.account-btn:hover {border-color:var(--line-strong)}
.account-btn img {width:22px;height:22px;border-radius:50%}
.account-name {max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.account-pop {position:absolute;right:0;top:calc(100% + 8px);z-index:50;width:260px;padding:14px;display:grid;gap:10px;justify-items:start;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:0 12px 32px rgb(0 0 0 / .14)}
.account-email {color:var(--text-secondary);font-size:12px;word-break:break-all}
.adm-runner {display:flex;flex-wrap:wrap;gap:6px 8px;align-items:center;margin-top:12px;color:var(--text-secondary);font-size:12px}
.adm-runner .sep {color:var(--text-muted)}
.badge.warn {background:#fdecc8;color:#7a4b00}
.adm-btn {height:36px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);color:var(--text);font-weight:600;font-size:13px;cursor:pointer}
.adm-btn:hover:not(:disabled) {border-color:var(--line-strong)}
.adm-btn.primary {background:var(--accent);border-color:transparent;color:var(--on-accent)}
.adm-btn:disabled {opacity:.45;cursor:not-allowed}
.adm-toolbar {margin:8px 0 12px;overflow-x:auto}
.adm-tabs button span {color:var(--text-muted);font-size:12px;margin-left:2px}
.adm-actions {display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px;min-height:36px}
.adm-count {color:var(--text-muted);font-size:12px}
.adm-check {display:inline-flex;align-items:center;gap:6px;font-size:13px;cursor:pointer}
.adm-check input {width:18px;height:18px;accent-color:var(--accent)}
.adm-list {display:grid;gap:10px}
.adm-row {display:grid;grid-template-columns:28px 160px 1fr;gap:14px;align-items:start;padding:12px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface)}
.adm-row.is-selected {border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.adm-row > .adm-check {padding-top:4px}
.adm-thumb {position:relative;display:block;aspect-ratio:16/9;border-radius:8px;overflow:hidden;background:var(--surface-soft)}
.adm-thumb img {width:100%;height:100%;object-fit:cover;display:block}
.adm-body {min-width:0;display:grid;gap:6px}
.adm-meta {display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13px}
.adm-text {margin:0;font-size:13px;line-height:1.6;color:var(--text-secondary);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;white-space:pre-line}
.adm-reason {margin:0;font-size:12px;color:var(--text-muted)}
.adm-links {display:flex;flex-wrap:wrap;gap:14px;font-size:12px;color:var(--text-muted)}
.adm-links a {color:var(--accent-text);font-weight:600}
.account-note {margin:0;color:var(--text-muted);font-size:12px;line-height:1.5}

.page {max-width:1280px;margin:0 auto;padding:40px 32px 32px}
.eyebrow {color:var(--accent-text);font-size:12px;font-weight:650;letter-spacing:.12em;margin-bottom:6px}
.page-title {font-size:32px;line-height:1.25;letter-spacing:-.01em}
.page-description {color:var(--text-secondary);margin-top:8px;font-size:15px}
.panel {border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);box-shadow:var(--shadow);min-width:0}
.panel-heading {display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;border-bottom:1px solid var(--line)}
.panel-heading h2 {font-size:15px}
.counter {display:inline-grid;place-items:center;min-width:22px;height:20px;padding:0 6px;border-radius:var(--radius-pill);background:var(--surface-soft);color:var(--text-secondary);font-size:11px;font-weight:600;margin-left:6px;vertical-align:1px}
.badge {display:inline-flex;align-items:center;gap:5px;padding:2px 8px;border-radius:var(--radius-sm);font-size:11px;font-weight:550;background:var(--neutral-soft);color:var(--neutral);white-space:nowrap}
.badge.accent {background:var(--accent-soft);color:var(--accent-text)}
.badge.danger {background:var(--danger-soft);color:var(--danger)}
.button {display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);font-size:13px;font-weight:550;color:var(--text-secondary)}
.button:hover {background:var(--surface-soft);color:var(--text)}
.button svg {width:14px;height:14px}
.segmented {display:inline-flex;padding:3px;border-radius:9px;background:var(--surface-soft);border:1px solid var(--line)}
.segmented button {min-height:30px;padding:3px 12px;border-radius:6px;font-size:12px;color:var(--text-secondary);white-space:nowrap}
.segmented button[aria-pressed="true"] {background:var(--surface);color:var(--text);box-shadow:0 1px 3px #0000001a;font-weight:600}
.tags {display:flex;flex-wrap:wrap;gap:5px;list-style:none;margin:0;padding:0}
.tag {display:inline-flex;align-items:center;gap:3px;height:20px;padding:0 7px;border-radius:var(--radius-pill);font-size:11px;font-weight:550;line-height:1;white-space:nowrap;background:var(--surface-soft);color:var(--text-secondary);border:1px solid var(--line)}
.tag svg {width:11px;height:11px}
.tag-person {background:var(--accent-soft);color:var(--accent-text);border-color:transparent}
.tag-org {background:var(--neutral-soft);color:var(--text);border-color:transparent}
.tag-more {color:var(--text-muted)}
.watch-tags {margin:-12px 0 20px}
.tl-more {display:flex;justify-content:center;padding:4px 0 28px}
.tl-end {text-align:center;color:var(--text-muted);font-size:12px;padding:4px 0 28px}
.empty-state {padding:56px 24px;text-align:center;color:var(--text-secondary)}
.empty-state h3 {color:var(--text);font-size:16px;margin-bottom:6px}
.empty-state code {font-family:var(--font-mono);font-size:12px;background:var(--surface-soft);padding:2px 6px;border-radius:4px}
.site-footer {display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:48px;padding-top:20px;border-top:1px solid var(--line);color:var(--text-muted);font-size:12px}

/* ---------- 时间线首页 ---------- */
.tl-heading {display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:28px}
.tl-stats {display:flex;gap:28px;margin-top:18px}
.tl-stat b {display:block;font-size:22px;line-height:1.2;font-family:var(--font-mono)}
.tl-stat span {color:var(--text-muted);font-size:12px}
.timeline {position:relative;max-width:920px}
.tl-month {position:relative;padding-left:120px}
.tl-month + .tl-month {margin-top:12px}
.tl-month-label {position:sticky;top:calc(var(--header-h) + 8px);z-index:2;display:inline-block;margin:0 0 14px -120px;padding:4px 12px;border-radius:var(--radius-pill);background:var(--surface);border:1px solid var(--line);font-size:12px;font-weight:650;color:var(--text-secondary)}
.tl-month::before {content:"";position:absolute;left:96px;top:0;bottom:0;width:2px;background:var(--line)}
.tl-item {position:relative;padding-bottom:20px}
.tl-date {position:absolute;left:-120px;top:14px;width:84px;text-align:right;line-height:1.3}
.tl-date b {display:block;font-size:15px;font-family:var(--font-mono)}
.tl-date span {color:var(--text-muted);font-size:11px}
.tl-item::before {content:"";position:absolute;left:-29px;top:20px;width:12px;height:12px;border-radius:50%;background:var(--surface);border:3px solid var(--accent);box-sizing:border-box}
.tl-item.pending::before {border-color:var(--line-strong)}
.tl-card {display:grid;grid-template-columns:240px 1fr;overflow:hidden;transition:border-color .15s,box-shadow .15s}
.tl-card:hover {border-color:var(--line-strong);box-shadow:var(--shadow-raised)}
.tl-thumb {position:relative;background:var(--video-bg);aspect-ratio:16/10;overflow:hidden}
.tl-thumb img {width:100%;height:100%;object-fit:cover;display:block}
.tl-thumb .no-poster {display:grid;place-items:center;height:100%;color:#ffffff80}
.tl-thumb .no-poster svg {width:34px;height:34px}
.tl-duration {position:absolute;right:8px;bottom:8px;padding:1px 6px;border-radius:4px;background:#000000b3;color:#fff;font:11px var(--font-mono)}
.tl-source {position:absolute;left:8px;top:8px;padding:1px 7px;border-radius:4px;background:#000000b3;color:#fff;font-size:10px;font-weight:600;letter-spacing:.03em}
.tl-body {padding:14px 18px 14px;display:flex;flex-direction:column;gap:6px;min-width:0}
.tl-title {font-size:16px;line-height:1.45;font-weight:650}
.tl-title-en {color:var(--text-muted);font-size:12px;line-height:1.4;margin-top:-3px}
.tl-author {display:flex;align-items:center;gap:7px;color:var(--text-secondary);font-size:12px;min-width:0}
.tl-author img,.avatar-fallback {width:20px;height:20px;border-radius:50%;flex-shrink:0;background:var(--surface-soft)}
.tl-author .handle {color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tl-text {color:var(--text-secondary);font-size:13px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tl-times {display:flex;flex-wrap:wrap;gap:4px 14px;color:var(--text-muted);font-size:12px}
.tl-times b {font-weight:550;color:var(--text-secondary)}
.tl-controls {display:flex;gap:8px;flex-wrap:wrap}
.fav-btn {display:inline-flex;align-items:center;justify-content:center;gap:5px;min-width:32px;height:32px;padding:0 8px;border-radius:8px;color:var(--text-muted);border:1px solid var(--line);background:var(--surface);font-size:12px}
.fav-btn svg {width:16px;height:16px}
.fav-btn:hover {color:var(--text);border-color:var(--line-strong)}
.fav-btn[aria-pressed="true"] {color:var(--mark-text);background:var(--mark);border-color:transparent}
.fav-btn[aria-pressed="true"] svg {fill:currentColor}
.tl-fav {position:absolute;top:10px;right:10px;z-index:1}
.tl-item:has(.tl-fav) .tl-body {padding-right:52px}
.fav-btn.with-label {height:26px;padding:0 9px}
.fav-btn.with-label svg {width:14px;height:14px}
.tl-foot {display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:auto;padding-top:4px;color:var(--text-muted);font-size:12px}

/* ---------- 播放学习页 ---------- */
.back-link {display:inline-block;color:var(--text-secondary);font-size:13px;margin-bottom:14px}
.back-link:hover {color:var(--accent-text)}
.watch-title {font-size:26px;line-height:1.35}
.watch-head {display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.step-nav {display:flex;gap:8px;flex:none;margin-top:3px}
.step-nav[hidden] {display:none}
.next-btn {gap:6px;font-weight:600;white-space:nowrap}
.next-btn span[aria-hidden] {font-size:15px;line-height:1}
.watch-title-en {color:var(--text-muted);font-size:14px;margin-top:2px}
.watch-meta {display:flex;align-items:center;gap:8px;flex-wrap:wrap;color:var(--text-secondary);font-size:13px;margin:10px 0 22px}
.watch-layout {display:grid;grid-template-columns:minmax(0,1fr) minmax(380px,440px);grid-template-areas:"player tr" "rest tr";gap:20px 24px;align-items:start}
.player-panel {grid-area:player;overflow:hidden}
.transcript-panel {grid-area:tr}
.watch-rest {grid-area:rest;display:flex;flex-direction:column;gap:20px;min-width:0}
.player-frame {position:relative;background:var(--video-bg);aspect-ratio:16/9;max-height:62vh;display:flex;justify-content:center}
.player-frame.portrait {aspect-ratio:auto;height:min(62vh,640px)}
.player-frame video,.player-frame iframe,.player-frame #yt-player {width:100%;height:100%;border:0;display:block;background:var(--video-bg)}
.player-frame video {object-fit:contain}
.player-frame.card {background:var(--surface-soft);aspect-ratio:auto;height:min(70vh,640px);padding:16px}
.player-frame.card iframe {max-width:550px;background:transparent}
.embed-note {padding:9px 16px;font-size:12px;color:var(--text-secondary);background:var(--surface-soft);border-top:1px solid var(--line);display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.embed-note a {color:var(--accent-text);font-weight:600}
.now-line {padding:14px 0 0;border-top:1px solid var(--line)}
.now-label {display:flex;justify-content:space-between;gap:12px;color:var(--text-muted);font-size:11px;letter-spacing:.04em;padding:0 22px 4px}
.ph-demo {font-size:11px}
/* 滚动字幕：整列句子靠 translateY 往上推，当前句停在中间，上下渐隐 */
.roller {position:relative;height:196px;overflow:hidden;-webkit-mask-image:linear-gradient(to bottom,transparent 0,#000 24%,#000 76%,transparent 100%);mask-image:linear-gradient(to bottom,transparent 0,#000 24%,#000 76%,transparent 100%)}
.roller-track {padding:0 22px;transition:transform .55s cubic-bezier(.22,.61,.36,1);will-change:transform}
.roll-line {padding:7px 0 7px 12px;border-left:3px solid transparent;opacity:.35;cursor:pointer;transition:opacity .35s,border-color .35s}
.roll-line:hover {opacity:.7}
.roll-line.active {opacity:1;border-left-color:var(--accent)}
.roll-en {font-size:18px;line-height:1.45;font-weight:550}
.roll-zh {font-size:14px;line-height:1.55;color:var(--text-secondary);margin-top:1px}
.roll-line.active .roll-zh {color:var(--text)}
.roller[data-mode="en"] .roll-zh,.roller[data-mode="zh"] .roll-en {display:none}
.roller[data-mode="zh"] .roll-zh {font-size:17px}
.now-placeholder {color:var(--text-muted);padding:0 22px 18px}

/* 来源卡片 */
.source-card {padding:18px 20px;display:grid;gap:12px}
.source-head {display:flex;align-items:center;gap:10px}
.source-head img,.source-head .avatar-fallback {width:40px;height:40px}
.source-name {font-weight:650;line-height:1.3}
.source-handle {color:var(--text-muted);font-size:12px}
.source-text {white-space:pre-wrap;color:var(--text-secondary);font-size:14px;overflow-wrap:anywhere}
.source-text a {color:var(--accent-text)}
.source-rows {display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-size:12px;color:var(--text-secondary);padding-top:12px;border-top:1px dashed var(--line)}
.source-rows dt {color:var(--text-muted)}
.source-rows dd {margin:0;overflow-wrap:anywhere}
.source-rows a {color:var(--accent-text)}
.source-actions {display:flex;gap:8px;flex-wrap:wrap}
.summary-body {padding:16px 20px 20px;font-size:14px;line-height:1.8}
.summary-en {color:var(--text-secondary);margin-top:10px;font-size:13px}

/* 逐句字幕：时间 | 英文 | 中文 三列对齐，跟随播放滚动 */
.transcript-panel {position:sticky;top:calc(var(--header-h) + 16px);display:flex;flex-direction:column;max-height:calc(100vh - var(--header-h) - 32px)}
.transcript-toolbar {display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:12px 14px;border-bottom:1px solid var(--line)}
.transcript-toolbar h2 {font-size:15px}
.toolbar-row {display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.follow-toggle {display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--text-secondary);padding:4px 10px;border-radius:7px;border:1px solid var(--line)}
.follow-toggle[aria-pressed="true"] {background:var(--accent-soft);color:var(--accent-text);border-color:transparent}
.follow-toggle svg {width:13px;height:13px}
.transcript {position:relative;overflow-y:auto;overscroll-behavior:contain;padding:8px 0 40vh;scroll-behavior:smooth;flex:1;min-height:240px}
.line {cursor:pointer;display:grid;grid-template-columns:44px minmax(0,1fr);column-gap:10px;width:100%;text-align:left;padding:9px 16px 9px 12px;border-left:3px solid transparent;transition:background .15s,opacity .2s}
.line:hover {background:var(--surface-soft)}
.line-time {font:11px/22px var(--font-mono);color:var(--text-muted)}
.line-en {font-size:15px;line-height:22px;font-weight:500}
.line-zh {grid-column:2;font-size:13px;line-height:20px;color:var(--text-secondary);margin-top:2px}
.line.active {background:var(--accent-soft);border-left-color:var(--accent)}
.line.active .line-en {font-weight:650}
.line.active .line-zh {color:var(--text)}
.transcript.dim .line:not(.active) {opacity:.55}
.transcript[data-mode="en"] .line-zh,.transcript[data-mode="zh"] .line-en {display:none}
.transcript[data-mode="zh"] .line-zh {grid-column:2;font-size:15px;line-height:22px;margin:0;color:var(--text)}
.transcript[data-mode="en"] .line-zh-pending {display:none}
.ph {background:var(--mark);color:var(--mark-text);border-radius:3px;padding:0 2px;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.ph[data-k] {cursor:help;border-bottom:1.5px dotted currentColor}
.ph[data-k]:hover,.ph[data-k]:focus-visible {background:var(--accent);color:var(--on-accent)}
/* 词组解释卡：全页共用一个，fixed 定位到被悬停的词旁边 */
.ph-pop {position:fixed;z-index:30;width:min(340px,calc(100vw - 16px));padding:14px 16px 14px;border:1px solid var(--line);border-radius:12px;background:var(--surface);box-shadow:0 12px 36px #0000002e;display:grid;gap:8px;font-size:13px;line-height:1.6}
.pop-head {display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.pop-phrase {font-size:18px;font-weight:700;line-height:1.3}
.pop-ipa {font-family:var(--font-mono);font-size:12px;color:var(--text-muted);margin-top:2px}
.pop-actions {display:flex;gap:6px}
.pop-meaning {font-size:15px;font-weight:600}
.pop-note {color:var(--text-secondary)}
.pop-ex {border-left:2px solid var(--accent);padding-left:10px;display:grid;gap:1px}
.pop-count {font-size:11px;color:var(--text-muted)}
.icon-btn.mini {width:22px;height:22px;border:0}
.resume-follow {position:absolute;left:50%;bottom:16px;transform:translateX(-50%);z-index:3;box-shadow:var(--shadow-raised)}
.transcript-wrap {position:relative;flex:1;display:flex;flex-direction:column;min-height:0}

/* 宽屏把字幕区放进主列时，中英两列并排对齐 */
.layout-wide .watch-layout {grid-template-columns:minmax(0,1fr);grid-template-areas:"player" "tr" "rest"}
.layout-wide .transcript-panel {position:static;max-height:none}
.layout-wide .transcript {max-height:520px}
.layout-wide .line {grid-template-columns:52px minmax(0,1fr) minmax(0,1fr);column-gap:20px}
.layout-wide .line-zh {grid-column:3;margin:0;font-size:14px;line-height:22px}
.layout-wide .transcript[data-mode="zh"] .line-zh {grid-column:2}

/* 词组与例句 */
.vocab-section .panel-heading p {color:var(--text-muted);font-size:12px}
.vocab-grid {display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1px;background:var(--line)}
.vocab-card {background:var(--surface);padding:16px 18px;display:flex;flex-direction:column;gap:8px}
.vocab-top {display:flex;align-items:flex-start;justify-content:space-between;gap:8px}
.vocab-phrase {font-size:17px;font-weight:650;line-height:1.35}
.vocab-meaning {font-size:14px}
.vocab-note {font-size:12px;color:var(--text-muted)}
.example {border-left:2px solid var(--line);padding:2px 0 2px 10px;display:grid;gap:1px}
.example-label {font-size:10px;letter-spacing:.08em;color:var(--text-muted);font-weight:650;display:flex;align-items:center;gap:6px}
.example-en {font-size:13px;line-height:1.55}
.example-zh {font-size:12px;color:var(--text-secondary)}
.example.from-video {border-left-color:var(--accent)}
.example button.example-en {text-align:left}
.example button.example-en:hover {color:var(--accent-text)}
.icon-btn {display:inline-grid;place-items:center;width:28px;height:28px;border-radius:7px;color:var(--text-secondary);border:1px solid var(--line);flex-shrink:0}
.icon-btn:hover {background:var(--surface-soft);color:var(--text)}
.icon-btn svg {width:14px;height:14px}

@media (max-width:1080px) {
  .watch-layout {grid-template-columns:minmax(0,1fr);grid-template-areas:"player" "tr" "rest"}
  .transcript-panel {position:static;max-height:none}
  .transcript {max-height:60vh;padding-bottom:30vh}
  #layout-toggle {display:none}
}
@media (max-width:720px) {
  .header-inner {padding:0 16px;gap:14px}
  .brand-caption,.account-name {display:none}
  .adm-row {grid-template-columns:24px 96px 1fr;gap:10px}
  .page {padding:24px 16px}
  .page-title {font-size:26px}
  .tl-month {padding-left:22px}
  .tl-month::before {left:4px}
  .tl-month-label {margin-left:-22px}
  /* 日期行固定 18px 高：圆点对准竖线（中心在 -17px）和日期行中线，收藏按钮落在卡片右上角 */
  .tl-item::before {left:-22px;top:4px;width:10px;height:10px}
  .tl-date {position:static;width:auto;height:18px;line-height:18px;text-align:left;margin:0 0 6px;display:flex;gap:6px;align-items:baseline}
  .tl-date b {display:inline;font-size:13px;line-height:18px}
  .tl-fav {top:34px}
  .tl-item:has(.tl-fav) .tl-body {padding-right:18px}
  .tl-card {grid-template-columns:1fr}
  .watch-title {font-size:21px}
  .watch-head {flex-direction:column;gap:10px}
  .roller {height:170px}
  .roll-en {font-size:16px}
  .roll-zh {font-size:13px}
  .player-frame.portrait {height:min(70vh,560px)}
}
@media (prefers-reduced-motion:reduce) {
  *,*::before,*::after {transition:none !important;scroll-behavior:auto !important}
}