/* 雅思爱我 · 设计变量（审核报告 §5.4） */
:root {
  --bg: #fbfbfa; --surface: #ffffff; --surface-2: #f5f5f4; --ink: #1d1d1f; --ink-2: #55555a; --ink-3: #6e6e73;
  --line: #e8e8ea; --line-2: #dededf;
  --accent: #2f6b4f; --accent-ink: #ffffff; --accent-soft: #eaf3ee; --accent-2: #24553e;
  --hook: #fff8e6; --hook-line: #f0dca8; --hook-ink: #8a5a00;
  --red: #b3261e; --red-soft: #fdeceb; --amber: #8a5a00; --amber-soft: #fff4dc;
  --shadow-1: 0 1px 2px rgba(16, 24, 20, .04), 0 1px 1px rgba(16, 24, 20, .03);
  --shadow-2: 0 1px 2px rgba(16, 24, 20, .04), 0 12px 32px -8px rgba(16, 24, 20, .10);
  --shadow-3: 0 24px 60px -12px rgba(16, 24, 20, .25);
  --r-sm: 8px; --r-md: 14px; --r-lg: 20px; --r-xl: 28px;
  --f-word: clamp(40px, 6vw, 56px); --f-display: clamp(30px, 4.4vw, 44px);
  --f-meaning: 20px; --f-body: 17px; --f-small: 14px; --f-micro: 12px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-en: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-ipa: "SF Pro Text", "Segoe UI", "Lucida Sans Unicode", "Noto Sans", sans-serif;
  --ease: cubic-bezier(.2, .8, .2, 1); --ease-out: cubic-bezier(.16, 1, .3, 1);
  --t-fast: 160ms; --t: 240ms; --t-slow: 420ms;
  --nav-h: 60px; --tab-h: 64px; --maxw: 1080px; --cardw: 720px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111312; --surface: #1a1c1b; --surface-2: #222524; --ink: #f2f2f0; --ink-2: #c4c6c3; --ink-3: #9a9d99;
    --line: #2a2d2b; --line-2: #343835;
    --accent: #5fb88b; --accent-ink: #0d1a13; --accent-soft: #1d2d24; --accent-2: #7cc9a0;
    --hook: #2a2416; --hook-line: #4a3d1f; --hook-ink: #e7c47a;
    --red: #ff8a80; --red-soft: #3a1f1d; --amber: #e7c47a; --amber-soft: #2f2715;
    --shadow-1: 0 1px 2px rgba(0, 0, 0, .3); --shadow-2: 0 12px 32px -8px rgba(0, 0, 0, .5); --shadow-3: 0 24px 60px -12px rgba(0, 0, 0, .7);
    color-scheme: dark;
  }
}
@media (prefers-reduced-motion: reduce) {
  :root { --t-fast: 1ms; --t: 1ms; --t-slow: 1ms; }
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; scroll-behavior: auto !important; }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: var(--f-body)/1.65 var(--font); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; min-height: 100dvh; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; -webkit-tap-highlight-color: transparent; }
input, textarea, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
[lang="en"] { font-family: var(--font-en); }
.ic { flex: none; display: block; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -48px; background: var(--ink); color: var(--bg); padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { top: 12px; }

/* ---------- 顶栏 ---------- */
.nav { position: sticky; top: 0; z-index: 40; height: var(--nav-h); background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid transparent; transition: border-color var(--t); }
.nav.scrolled { border-bottom-color: var(--line); }
.nav-in { max-width: var(--maxw); margin: 0 auto; height: 100%; display: flex; align-items: center; gap: 16px; padding: 0 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; font-size: 17px; letter-spacing: .02em; white-space: nowrap; }
.brand-mark { width: 28px; height: 28px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font-size: 15px; font-weight: 700; box-shadow: inset 0 -1px 0 rgba(0,0,0,.12); }
.nav-links { display: flex; gap: 2px; margin-left: 24px; }
.nav-links a { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 999px; font-size: 15px; color: var(--ink-2); transition: background var(--t-fast), color var(--t-fast); }
.nav-links a:hover { background: var(--surface-2); color: var(--ink); }
.nav-links a[aria-current="page"] { color: var(--ink); background: var(--surface-2); font-weight: 600; }
.nav-actions { margin-left: auto; display: flex; gap: 4px; align-items: center; }
.icon-btn { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 999px; color: var(--ink-2); transition: background var(--t-fast), color var(--t-fast), transform var(--t-fast); }
.icon-btn:hover { background: var(--surface-2); color: var(--ink); }
.icon-btn:active { transform: scale(.94); }
.search-trigger { display: inline-flex; align-items: center; gap: 8px; height: 36px; padding: 0 12px 0 10px; border-radius: 999px; background: var(--surface-2); color: var(--ink-3); font-size: 14px; min-width: 200px; transition: background var(--t-fast); }
.search-trigger:hover { background: var(--line); }
.search-trigger kbd { margin-left: auto; font: 12px var(--font-en); color: var(--ink-3); border: 1px solid var(--line-2); border-radius: 5px; padding: 0 5px; }

/* ---------- 底部标签栏（手机） ---------- */
.tabbar { display: none; }
@media (max-width: 760px) {
  .nav-links, .search-trigger { display: none; }
  .nav-in { padding: 0 12px 0 16px; }
  .tabbar { display: grid; grid-template-columns: repeat(5, 1fr); position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; height: calc(var(--tab-h) + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-top: 1px solid var(--line); }
  .tabbar a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; font-size: 11px; color: var(--ink-3); transition: color var(--t-fast); }
  .tabbar a[aria-current="page"] { color: var(--accent); font-weight: 600; }
  .tabbar a .ic { transition: transform var(--t) var(--ease-out); }
  .tabbar a[aria-current="page"] .ic { transform: translateY(-1px) scale(1.06); }
  body.focus-mode .tabbar { display: none; }
}

/* ---------- 页面容器与过渡 ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 32px 24px 96px; }
@media (max-width: 760px) { main { padding: 20px 16px calc(var(--tab-h) + 40px + env(safe-area-inset-bottom)); } body.focus-mode main { padding-bottom: 32px; } }
.view { animation: viewIn var(--t-slow) var(--ease-out) both; }
@keyframes viewIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.page-head { margin: 8px 0 28px; }
.eyebrow { font-size: var(--f-small); color: var(--ink-3); margin: 0 0 6px; }
.h1 { font-size: var(--f-display); line-height: 1.15; font-weight: 700; letter-spacing: -.01em; margin: 0; }
.h2 { font-size: 20px; font-weight: 650; margin: 0 0 14px; letter-spacing: -.005em; }
.sub { color: var(--ink-2); margin: 10px 0 0; font-size: 16px; }
.muted { color: var(--ink-3); }
.small { font-size: var(--f-small); }
.section { margin-top: 40px; }

/* ---------- 通用组件 ---------- */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--shadow-1); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 48px; padding: 0 22px; border-radius: var(--r-md); font-weight: 600; font-size: 16px; transition: transform var(--t-fast) var(--ease), background var(--t-fast), box-shadow var(--t-fast), opacity var(--t-fast); user-select: none; }
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 1px 0 rgba(255,255,255,.12) inset, 0 6px 16px -6px color-mix(in srgb, var(--accent) 60%, transparent); }
.btn-primary:hover { background: var(--accent-2); }
.btn-secondary { background: var(--surface-2); color: var(--ink); }
.btn-secondary:hover { background: var(--line); }
.btn-ghost { color: var(--ink-2); height: 40px; padding: 0 12px; }
.btn-ghost:hover { background: var(--surface-2); color: var(--ink); }
.btn[disabled] { opacity: .45; pointer-events: none; }
.btn-block { width: 100%; }
.pill { display: inline-flex; align-items: center; gap: 4px; font: 600 var(--f-micro)/1 var(--font); padding: 5px 8px; border-radius: 6px; background: var(--surface-2); color: var(--ink-2); letter-spacing: .02em; }
.pill-accent { background: var(--accent-soft); color: var(--accent); }
.pill-amber { background: var(--amber-soft); color: var(--amber); }
.seg { display: inline-flex; padding: 3px; background: var(--surface-2); border-radius: 12px; gap: 2px; position: relative; }
.seg button { position: relative; z-index: 1; padding: 7px 14px; border-radius: 9px; font-size: 14px; color: var(--ink-2); transition: color var(--t-fast); white-space: nowrap; }
.seg button[aria-pressed="true"] { color: var(--ink); font-weight: 600; background: var(--surface); box-shadow: var(--shadow-1); }
.grid { display: grid; gap: 16px; }
.empty { text-align: center; padding: 56px 16px; color: var(--ink-3); }
.empty .ic { margin: 0 auto 14px; color: var(--ink-3); }
.empty h3 { color: var(--ink); font-size: 18px; margin: 0 0 6px; }
.spinner { width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--line-2); border-top-color: var(--accent); animation: spin .8s linear infinite; margin: 64px auto; }
@keyframes spin { to { transform: rotate(360deg); } }
.skeleton { background: linear-gradient(90deg, var(--surface-2), var(--line), var(--surface-2)); background-size: 200% 100%; animation: shimmer 1.2s infinite; border-radius: 8px; }
@keyframes shimmer { to { background-position: -200% 0; } }

/* ---------- 首页 ---------- */
.hero { display: grid; grid-template-columns: 1.25fr 1fr; gap: 20px; align-items: stretch; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; } }
.task { padding: 32px; position: relative; overflow: hidden; display: flex; flex-direction: column; }
.task::after { content: ""; position: absolute; right: -80px; top: -80px; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(closest-side, color-mix(in srgb, var(--accent) 14%, transparent), transparent); pointer-events: none; }
.task-nums { display: flex; gap: 36px; margin: 22px 0 28px; }
.num b { display: block; font: 700 44px/1 var(--font-en); letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.num span { display: block; margin-top: 8px; font-size: var(--f-small); color: var(--ink-3); }
.task-foot { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: auto; }
.task-foot .muted { font-size: var(--f-small); display: inline-flex; align-items: center; gap: 6px; }
.side { display: grid; gap: 20px; grid-template-rows: auto 1fr; }
.resume { padding: 20px 22px; display: flex; align-items: center; gap: 14px; transition: transform var(--t) var(--ease), box-shadow var(--t); }
.resume:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }
.resume .ico-wrap { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); flex: none; }
.resume .t { font-weight: 600; } .resume .d { color: var(--ink-3); font-size: var(--f-small); }
.resume .ic:last-child { margin-left: auto; color: var(--ink-3); }
.week { padding: 22px; }
.week-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 16px; }
.week-head b { font: 700 28px/1 var(--font-en); font-variant-numeric: tabular-nums; }
.bars { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; align-items: end; height: 96px; }
.bar { display: flex; flex-direction: column; align-items: center; gap: 6px; height: 100%; justify-content: flex-end; }
.bar i { display: block; width: 100%; max-width: 28px; border-radius: 6px; background: var(--accent); opacity: .85; transform-origin: bottom; animation: grow var(--t-slow) var(--ease-out) both; min-height: 4px; }
.bar i.zero { background: var(--line); opacity: 1; }
.bar.today i { opacity: 1; }
.bar span { font-size: 11px; color: var(--ink-3); }
@keyframes grow { from { transform: scaleY(0); } to { transform: scaleY(1); } }
.streak { display: inline-flex; align-items: center; gap: 6px; color: var(--amber); font-weight: 600; font-size: var(--f-small); }
.quick { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 860px) { .quick { grid-template-columns: repeat(2, 1fr); } }
.quick a { padding: 20px; display: flex; flex-direction: column; gap: 14px; transition: transform var(--t) var(--ease), box-shadow var(--t); min-height: 128px; }
.quick a:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }
.quick .ico-wrap { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; background: var(--surface-2); color: var(--ink); }
.quick .t { font-weight: 600; } .quick .d { color: var(--ink-3); font-size: var(--f-small); margin-top: 2px; }

/* ---------- 学习会话 ---------- */
.session-bar { position: sticky; top: var(--nav-h); z-index: 30; display: flex; align-items: center; gap: 12px; max-width: var(--cardw); margin: -8px auto 16px; padding: 8px 0; background: var(--bg); }
.session-bar .crumb { font-size: var(--f-small); color: var(--ink-2); white-space: nowrap; }
.progress { flex: 1; height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; }
.progress i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 2px; transition: width var(--t-slow) var(--ease-out); }
.session-bar .count { font: 500 var(--f-small)/1 var(--font-en); color: var(--ink-2); font-variant-numeric: tabular-nums; min-width: 44px; text-align: right; }
.stage { max-width: var(--cardw); margin: 0 auto; }

/* ---------- 单词卡 ---------- */
.wcard { padding: 48px 48px 32px; position: relative; }
@media (max-width: 760px) { .wcard { padding: 28px 22px 24px; border-radius: var(--r-lg); } }
.w-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.word { font: 700 var(--f-word)/1.05 var(--font-en); letter-spacing: -.02em; margin: 0; word-break: break-word; }
.w-meta { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; padding-top: 6px; }
.flag { margin: 10px 0 0; font-size: var(--f-small); color: var(--ink-3); display: flex; gap: 6px; align-items: center; }
.pron { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.chip-audio { display: inline-flex; align-items: center; gap: 7px; min-height: 36px; padding: 6px 13px 6px 10px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); font: 15px/1.2 var(--font-ipa); color: var(--ink-2); transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast); }
.chip-audio:hover { border-color: var(--line-2); background: var(--surface-2); }
.chip-audio:active { transform: scale(.96); }
.chip-audio em { font: 600 12px/1 var(--font); font-style: normal; color: var(--ink-3); }
.chip-audio .ic { color: var(--accent); }
.chip-audio.primary { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }
.chip-audio.playing .ic { animation: pulse 1s var(--ease) infinite; }
@keyframes pulse { 50% { transform: scale(1.18); opacity: .7; } }
.ipa-note { font-size: var(--f-small); color: var(--ink-3); margin: 8px 0 0; }
.meaning { margin: 24px 0 0; font-size: var(--f-meaning); line-height: 1.5; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; }
.meaning .pos { font: 600 var(--f-micro)/1 var(--font-en); color: var(--accent); background: var(--accent-soft); border-radius: 6px; padding: 4px 6px; transform: translateY(-2px); }
.meaning .m { font-weight: 500; }
.meaning .sep { color: var(--line-2); }
.hook { margin: 28px 0 0; padding: 18px 20px; background: var(--hook); border: 1px solid var(--hook-line); border-radius: var(--r-md); }
.hook-k { display: inline-flex; align-items: center; gap: 6px; font: 600 var(--f-micro)/1 var(--font); color: var(--hook-ink); letter-spacing: .04em; }
.hook-k .tag { padding: 3px 6px; border-radius: 5px; background: color-mix(in srgb, var(--hook-ink) 12%, transparent); }
.formula { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; margin-top: 12px; font: 600 17px/1.4 var(--font-en); }
.formula .plus { color: var(--ink-3); font-weight: 400; }
.fpart { display: inline-flex; flex-direction: column; gap: 2px; }
.fpart b { font-weight: 650; color: var(--ink); }
.fpart .src { color: var(--ink-2); font-weight: 500; }
.fpart .src .arrow { color: var(--ink-3); margin: 0 4px; font-weight: 400; }
.fpart small { font: 400 12px/1.3 var(--font); color: var(--ink-3); }
.hook p { margin: 10px 0 0; font-size: var(--f-body); color: var(--ink); }
.hw { font-family: var(--font-en); font-weight: 650; color: var(--ink); border-bottom: 1.5px dotted color-mix(in srgb, var(--hook-ink) 60%, transparent); cursor: pointer; padding: 0 1px; }
.hw:hover { background: color-mix(in srgb, var(--hook-ink) 10%, transparent); border-radius: 3px; }
.syl { display: flex; align-items: center; gap: 4px; margin-top: 12px; font: 600 22px/1.2 var(--font-en); letter-spacing: .01em; flex-wrap: wrap; }
.syl i { font-style: normal; color: var(--ink-3); font-weight: 400; }
.hook.plain { background: var(--surface-2); border-color: transparent; }
.hook.plain .hook-k { color: var(--ink-2); }
.hook.plain .hook-k .tag { background: var(--line); }

/* 折叠区 */
.more { margin-top: 28px; border-top: 1px solid var(--line); }
.acc { border-bottom: 1px solid var(--line); }
.acc-h { width: 100%; display: flex; align-items: center; gap: 12px; padding: 15px 2px; min-height: 52px; text-align: left; font-size: 16px; color: var(--ink); }
.acc-h .ic:first-child { color: var(--ink-3); }
.acc-h .sum { margin-left: auto; color: var(--ink-3); font-size: var(--f-small); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 50%; }
.acc-h .chev { color: var(--ink-3); transition: transform var(--t) var(--ease); }
.acc[data-open="true"] .chev { transform: rotate(180deg); }
.acc-b { display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--t) var(--ease); }
.acc[data-open="true"] .acc-b { grid-template-rows: 1fr; }
.acc-b > div { overflow: hidden; }
.acc-in { padding: 0 2px 20px 32px; font-size: 16px; color: var(--ink-2); opacity: 0; transform: translateY(-4px); transition: opacity var(--t) var(--ease), transform var(--t) var(--ease); }
.acc[data-open="true"] .acc-in { opacity: 1; transform: none; }
@media (max-width: 760px) { .acc-in { padding-left: 2px; } }
.ex { margin: 0 0 14px; }
.ex:last-child { margin-bottom: 0; }
.ex .en { display: block; color: var(--ink); font-size: 17px; line-height: 1.55; }
.ex .en mark { background: none; color: var(--accent); font-weight: 650; }
.ex .zh { display: block; color: var(--ink-3); font-size: 15px; margin-top: 2px; }
.ex .ph { display: inline-block; font-size: 12px; color: var(--ink-3); margin-bottom: 2px; }
.sense { padding: 10px 0; border-top: 1px dashed var(--line); }
.sense:first-child { border-top: 0; padding-top: 0; }
.sense .t { color: var(--ink); font-weight: 500; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.wchip { display: inline-flex; align-items: baseline; gap: 6px; padding: 7px 12px; border-radius: 10px; background: var(--surface-2); font-size: 14px; transition: background var(--t-fast), transform var(--t-fast); }
.wchip:hover { background: var(--line); }
.wchip:active { transform: scale(.97); }
.wchip b { font: 600 15px var(--font-en); color: var(--ink); }
.alt { padding: 14px 16px; border-radius: 12px; background: var(--surface-2); margin-bottom: 10px; }
.alt-h { display: flex; justify-content: space-between; align-items: center; font-size: var(--f-small); color: var(--ink-3); margin-bottom: 6px; gap: 8px; }
.alt .formula { margin-top: 4px; }
.alt p { margin: 6px 0 0; color: var(--ink); }
.linkbtn { color: var(--accent); font-size: var(--f-small); font-weight: 600; padding: 4px 6px; border-radius: 6px; }
.linkbtn:hover { background: var(--accent-soft); }
textarea.note { width: 100%; min-height: 96px; resize: vertical; border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; background: var(--surface); line-height: 1.6; font-size: 16px; transition: border-color var(--t-fast), box-shadow var(--t-fast); }
textarea.note:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.saved { font-size: 12px; color: var(--ink-3); margin-top: 6px; min-height: 18px; }
.editor-note { font-size: 13px; color: var(--ink-3); line-height: 1.6; white-space: pre-wrap; }

/* 自评栏 */
.rate { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 32px; }
.rate button { position: relative; min-height: 56px; border-radius: var(--r-md); font-weight: 600; font-size: 16px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; transition: transform var(--t-fast) var(--ease), background var(--t-fast), box-shadow var(--t-fast); overflow: hidden; }
.rate button small { font-weight: 400; font-size: 12px; opacity: .8; font-variant-numeric: tabular-nums; }
.rate button:active { transform: scale(.96); }
.rate .r1 { background: var(--red-soft); color: var(--red); }
.rate .r2 { background: var(--surface-2); color: var(--ink-2); }
.rate .r3 { background: var(--accent); color: var(--accent-ink); }
.rate button.chosen { animation: chosen var(--t-slow) var(--ease-out); }
@keyframes chosen { 0% { transform: scale(.94); } 50% { transform: scale(1.03); } 100% { transform: scale(1); } }
.rate kbd { position: absolute; top: 6px; right: 8px; font: 11px var(--font-en); opacity: .45; }
@media (max-width: 760px) {
  .rate.sticky { position: fixed; left: 0; right: 0; bottom: 0; z-index: 35; margin: 0; padding: 12px 16px calc(12px + env(safe-area-inset-bottom)); background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-top: 1px solid var(--line); }
  .rate kbd { display: none; }
  body.has-rate main { padding-bottom: calc(120px + env(safe-area-inset-bottom)); }
}
.reveal-wrap { margin-top: 28px; }
.front-meaning { font-size: 26px; font-weight: 600; line-height: 1.4; margin: 6px 0 0; }
.front-hint { color: var(--ink-3); font-size: var(--f-small); margin-top: 14px; display: flex; align-items: center; gap: 6px; }
.status-line { display: flex; align-items: center; gap: 8px; font-size: var(--f-small); color: var(--ink-3); margin-top: 18px; flex-wrap: wrap; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line-2); display: inline-block; flex: none; }
.dot.new { background: var(--line-2); } .dot.learning { background: #d9a227; } .dot.due { background: var(--red); } .dot.mastered { background: var(--accent); }
.word-nav { display: flex; justify-content: space-between; max-width: var(--cardw); margin: 16px auto 0; }

/* 完成页 */
.done { text-align: center; padding: 56px 24px; }
.done .badge { width: 72px; height: 72px; margin: 0 auto 20px; border-radius: 24px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); animation: pop var(--t-slow) var(--ease-out) both; }
@keyframes pop { from { transform: scale(.6); opacity: 0; } to { transform: none; opacity: 1; } }
.done .h1 { font-size: 30px; }
.done .row { display: flex; gap: 12px; justify-content: center; margin-top: 28px; flex-wrap: wrap; }
.summary { display: flex; justify-content: center; gap: 32px; margin-top: 24px; }
.summary b { display: block; font: 700 28px/1 var(--font-en); }
.summary span { font-size: var(--f-small); color: var(--ink-3); }

/* ---------- 词库 ---------- */
.lib-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.tile { padding: 20px; display: flex; flex-direction: column; gap: 10px; transition: transform var(--t) var(--ease), box-shadow var(--t); }
.tile:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }
.tile .t { font-weight: 650; font-size: 17px; display: flex; align-items: center; gap: 8px; }
.tile .d { color: var(--ink-3); font-size: var(--f-small); }
.meter { height: 6px; border-radius: 3px; background: var(--surface-2); overflow: hidden; }
.meter i { display: block; height: 100%; background: var(--accent); border-radius: 3px; transition: width var(--t-slow) var(--ease-out); }
.groups { display: grid; grid-template-columns: repeat(auto-fill, minmax(92px, 1fr)); gap: 10px; }
.gcell { aspect-ratio: 1; border-radius: 16px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; background: var(--surface); border: 1px solid var(--line); font: 600 15px var(--font-en); transition: transform var(--t-fast) var(--ease), box-shadow var(--t-fast); position: relative; }
.gcell:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }
.gcell svg.ring { width: 34px; height: 34px; transform: rotate(-90deg); }
.gcell .ring circle { fill: none; stroke-width: 3.5; }
.gcell .ring .bg { stroke: var(--surface-2); } .gcell .ring .fg { stroke: var(--accent); stroke-linecap: round; transition: stroke-dashoffset var(--t-slow) var(--ease-out); }
.gcell span { font-size: 12px; color: var(--ink-3); font-weight: 500; }
.wlist { list-style: none; margin: 0; padding: 0; }
.wlist li a { display: grid; grid-template-columns: 14px minmax(110px, 200px) 1fr auto; gap: 14px; align-items: center; padding: 13px 18px; border-bottom: 1px solid var(--line); transition: background var(--t-fast); }
.wlist li:last-child a { border-bottom: 0; }
.wlist li a:hover { background: var(--surface-2); }
.wlist .w { font: 600 17px var(--font-en); }
.wlist .m { color: var(--ink-2); font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.wlist .lv { font-size: 12px; color: var(--ink-3); }
@media (max-width: 560px) { .wlist li a { grid-template-columns: 10px 1fr auto; } .wlist .m { grid-column: 2 / 4; margin-top: -10px; } .wlist .lv { grid-row: 1; grid-column: 3; } }
.list-actions { display: flex; gap: 10px; margin: 0 0 18px; flex-wrap: wrap; }
.back { display: inline-flex; align-items: center; gap: 4px; color: var(--ink-2); font-size: 15px; margin-bottom: 12px; padding: 6px 8px 6px 2px; border-radius: 8px; }
.back:hover { color: var(--ink); }

/* ---------- 测验 ---------- */
.quiz-setup { max-width: 640px; }
.field { margin-bottom: 22px; }
.field > label, .field > .lbl { display: block; font-size: var(--f-small); color: var(--ink-3); margin-bottom: 8px; }
.qcard { padding: 40px; max-width: var(--cardw); margin: 0 auto; }
@media (max-width: 760px) { .qcard { padding: 26px 20px; } }
.q-prompt { font-size: 15px; color: var(--ink-3); margin: 0 0 8px; }
.q-word { font: 700 44px/1.1 var(--font-en); letter-spacing: -.02em; margin: 0; }
.q-zh { font-size: 26px; font-weight: 600; margin: 0; line-height: 1.4; }
.opts { display: grid; gap: 10px; margin-top: 26px; }
.opt { text-align: left; padding: 15px 18px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--surface); font-size: 17px; display: flex; gap: 12px; align-items: center; transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast); }
.opt:hover { border-color: var(--line-2); background: var(--surface-2); }
.opt:active { transform: scale(.99); }
.opt kbd { font: 12px var(--font-en); color: var(--ink-3); border: 1px solid var(--line-2); border-radius: 5px; width: 22px; height: 22px; display: grid; place-items: center; flex: none; }
.opt.right { border-color: var(--accent); background: var(--accent-soft); color: var(--ink); }
.opt.wrong { border-color: var(--red); background: var(--red-soft); animation: shake 360ms var(--ease); }
@keyframes shake { 20%, 60% { transform: translateX(-5px); } 40%, 80% { transform: translateX(5px); } }
.spell { display: flex; gap: 10px; margin-top: 26px; }
.spell input { flex: 1; height: 52px; border-radius: var(--r-md); border: 1px solid var(--line-2); padding: 0 16px; font: 500 22px var(--font-en); background: var(--surface); letter-spacing: .02em; transition: border-color var(--t-fast), box-shadow var(--t-fast); min-width: 0; }
.spell input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.spell input.right { border-color: var(--accent); }
.spell input.wrong { border-color: var(--red); animation: shake 360ms var(--ease); }
.hint { margin-top: 12px; font: 15px var(--font-en); color: var(--ink-3); letter-spacing: .2em; }
.feedback { margin-top: 18px; min-height: 28px; font-size: 15px; display: flex; align-items: center; gap: 8px; }
.feedback.ok { color: var(--accent); } .feedback.no { color: var(--red); }
.q-foot { display: flex; justify-content: flex-end; margin-top: 18px; }

/* ---------- 进度 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
@media (max-width: 760px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { padding: 20px; }
.stat b { display: block; font: 700 34px/1 var(--font-en); letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.stat span { display: flex; align-items: center; gap: 6px; margin-top: 10px; font-size: var(--f-small); color: var(--ink-3); }
.rows { padding: 8px 22px; }
.row-meter { display: grid; grid-template-columns: 80px 1fr 90px; gap: 14px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.row-meter:last-child { border-bottom: 0; }
.row-meter .n { text-align: right; color: var(--ink-3); font: 14px var(--font-en); font-variant-numeric: tabular-nums; }
.forecast { padding: 22px; }
.forecast .bars { height: 120px; }

/* ---------- 设置 ---------- */
.settings { max-width: 680px; }
.set-group { margin-bottom: 28px; }
.set-group h2 { font-size: 13px; font-weight: 600; color: var(--ink-3); letter-spacing: .04em; margin: 0 0 8px 4px; }
.set-list { overflow: hidden; }
.set-row { display: flex; align-items: center; gap: 14px; padding: 14px 18px; border-bottom: 1px solid var(--line); min-height: 60px; }
.set-row:last-child { border-bottom: 0; }
.set-row .t { flex: 1; } .set-row .t small { display: block; color: var(--ink-3); font-size: 13px; }
.switch { width: 50px; height: 30px; border-radius: 999px; background: var(--line-2); position: relative; transition: background var(--t) var(--ease); flex: none; }
.switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 24px; height: 24px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.2); transition: transform var(--t) var(--ease-out); }
.switch[aria-checked="true"] { background: var(--accent); }
.switch[aria-checked="true"]::after { transform: translateX(20px); }
.set-row.danger { color: var(--red); }

/* ---------- 搜索 / 底部面板 / 提示 ---------- */
.overlay { position: fixed; inset: 0; z-index: 60; background: rgba(10, 14, 12, .32); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); display: flex; justify-content: center; align-items: flex-start; padding: 12vh 16px 16px; animation: fade var(--t) var(--ease) both; }
.overlay.closing { animation: fadeOut var(--t-fast) var(--ease) both; }
@keyframes fade { from { opacity: 0; } } @keyframes fadeOut { to { opacity: 0; } }
.palette { width: 100%; max-width: 620px; background: var(--surface); border-radius: var(--r-lg); box-shadow: var(--shadow-3); overflow: hidden; animation: rise var(--t) var(--ease-out) both; border: 1px solid var(--line); }
@keyframes rise { from { opacity: 0; transform: translateY(12px) scale(.98); } }
.palette-in { display: flex; align-items: center; gap: 10px; padding: 0 16px; border-bottom: 1px solid var(--line); }
.palette-in input { flex: 1; height: 58px; border: 0; background: none; font-size: 18px; outline: none; min-width: 0; }
.palette-in .ic { color: var(--ink-3); }
.results { max-height: min(60vh, 480px); overflow-y: auto; padding: 6px; overscroll-behavior: contain; }
.results a { display: flex; align-items: baseline; gap: 12px; padding: 11px 12px; border-radius: 10px; }
.results a[aria-selected="true"], .results a:hover { background: var(--surface-2); }
.results .w { font: 600 17px var(--font-en); }
.results .m { color: var(--ink-3); font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; }
.results .lv { font-size: 12px; color: var(--ink-3); }
.results .none { padding: 28px; text-align: center; color: var(--ink-3); font-size: 15px; }
@media (max-width: 760px) { .overlay.search { padding: 0; align-items: stretch; } .overlay.search .palette { max-width: none; border-radius: 0; border: 0; } .overlay.search .results { max-height: calc(100dvh - 60px); } }
.sheet-wrap { align-items: flex-end; padding: 0; }
.sheet { width: 100%; max-width: 560px; background: var(--surface); border-radius: 24px 24px 0 0; padding: 10px 24px calc(28px + env(safe-area-inset-bottom)); box-shadow: var(--shadow-3); animation: sheetUp var(--t-slow) var(--ease-out) both; }
@keyframes sheetUp { from { transform: translateY(100%); } }
.sheet .grab { width: 36px; height: 5px; border-radius: 3px; background: var(--line-2); margin: 0 auto 18px; }
.sheet h3 { font: 700 30px/1.1 var(--font-en); margin: 0; }
.sheet p { margin: 8px 0 0; color: var(--ink-2); }
.sheet .row { display: flex; gap: 10px; margin-top: 20px; }
.toast { position: fixed; left: 50%; bottom: calc(var(--tab-h) + 24px + env(safe-area-inset-bottom)); transform: translateX(-50%); z-index: 70; background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 12px; font-size: 14px; box-shadow: var(--shadow-3); animation: toast 2.4s var(--ease) both; pointer-events: none; }
@media (min-width: 761px) { .toast { bottom: 32px; } }
@keyframes toast { 0% { opacity: 0; transform: translate(-50%, 8px); } 10%, 85% { opacity: 1; transform: translate(-50%, 0); } 100% { opacity: 0; } }
.foot { max-width: var(--maxw); margin: 0 auto; padding: 0 24px 40px; color: var(--ink-3); font-size: 13px; }
@media (max-width: 760px) { .foot { display: none; } }
.err { max-width: 520px; margin: 80px auto; text-align: center; }
.mobile-only { display: none; }
@media (max-width: 760px) { .mobile-only { display: grid; } }
.brand-mark svg { display: block; }

@media (max-width: 760px) {
  body:not(.focus-mode) .rate.sticky { bottom: calc(var(--tab-h) + env(safe-area-inset-bottom)); padding-bottom: 12px; }
  body.has-rate:not(.focus-mode) main { padding-bottom: calc(var(--tab-h) + 120px + env(safe-area-inset-bottom)); }
  .opt kbd, .front-hint { display: none; }
  .task { padding: 24px; }
  .task-nums { margin: 16px 0 22px; }
}
.task-total { margin-top: 22px; display: grid; gap: 8px; }
.task-total .lbl { display: flex; justify-content: space-between; font-size: var(--f-small); color: var(--ink-3); }

/* ================= 动效与质感升级 ================= */
:root { --spring: cubic-bezier(.22, 1.25, .36, 1); }
/* 依次入场 */
.stagger > *, .stagger .hero > *, .stagger .quick > *, .stagger .tiles > * { animation: viewIn 560ms var(--ease-out) both; }
.stagger > *:nth-child(2), .stagger .hero > *:nth-child(1) { animation-delay: 60ms; }
.stagger .hero > *:nth-child(2) { animation-delay: 130ms; }
.stagger > *:nth-child(3) { animation-delay: 200ms; }
.stagger .quick > *:nth-child(1), .stagger .tiles > *:nth-child(1) { animation-delay: 220ms; }
.stagger .quick > *:nth-child(2), .stagger .tiles > *:nth-child(2) { animation-delay: 270ms; }
.stagger .quick > *:nth-child(3), .stagger .tiles > *:nth-child(3) { animation-delay: 320ms; }
.stagger .quick > *:nth-child(4), .stagger .tiles > *:nth-child(4) { animation-delay: 370ms; }
.stagger .tiles > *:nth-child(5) { animation-delay: 420ms; } .stagger .tiles > *:nth-child(6) { animation-delay: 470ms; }
.enter .wcard > * { animation: viewIn 520ms var(--ease-out) both; }
.enter .wcard > *:nth-child(2) { animation-delay: 50ms; } .enter .wcard > *:nth-child(3) { animation-delay: 100ms; }
.enter .wcard > *:nth-child(4) { animation-delay: 150ms; } .enter .wcard > *:nth-child(5) { animation-delay: 200ms; }
.enter .wcard > *:nth-child(6) { animation-delay: 250ms; } .enter .wcard > *:nth-child(7) { animation-delay: 300ms; }
.enter .wcard > *:nth-child(n+8) { animation-delay: 340ms; }
.enter + .rate, .enter .rate { animation: viewIn 520ms var(--ease-out) 260ms both; }

/* 首页任务卡 */
.task { background: linear-gradient(160deg, color-mix(in srgb, var(--accent) 7%, var(--surface)) 0%, var(--surface) 55%); }
.task::after { opacity: .9; }
.task-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; position: relative; z-index: 1; }
.today-ring { position: relative; width: 64px; height: 64px; flex: none; }
.today-ring svg, .score-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.today-ring circle, .score-ring circle { fill: none; stroke-width: 6; }
.today-ring .bg, .score-ring .bg { stroke: color-mix(in srgb, var(--accent) 12%, var(--surface-2)); }
.today-ring .fg, .score-ring .fg { stroke: var(--accent); stroke-linecap: round; transition: stroke-dashoffset 1100ms var(--ease-out) 200ms; }
.today-ring span { position: absolute; inset: 0; display: grid; place-items: center; font: 600 13px var(--font-en); color: var(--ink-2); }
.today-ring span b { font-size: 16px; color: var(--ink); }
.today-ring span { grid-auto-flow: column; align-content: center; justify-content: center; }
.num b { background: linear-gradient(180deg, var(--ink), color-mix(in srgb, var(--ink) 70%, var(--accent))); -webkit-background-clip: text; background-clip: text; color: transparent; }
.meter i { width: 0; transition: width 1000ms var(--ease-out) 150ms; }
.meter i[style] { transition: width var(--t-slow) var(--ease-out); }
.task-total .meter { height: 6px; background: color-mix(in srgb, var(--accent) 10%, var(--surface-2)); }

/* 单词卡质感 */
.wcard { box-shadow: var(--shadow-2); border-color: color-mix(in srgb, var(--line) 70%, transparent); }
.word { background: linear-gradient(180deg, var(--ink) 30%, color-mix(in srgb, var(--ink) 75%, var(--accent))); -webkit-background-clip: text; background-clip: text; color: transparent; padding-bottom: .06em; }
.hook { position: relative; overflow: hidden; background: linear-gradient(135deg, var(--hook), color-mix(in srgb, var(--hook) 70%, var(--surface))); }
.hook::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--hook-line); }
.hook.plain::before { display: none; }
.slot { transform-origin: 50% 40%; }

.slot.flipping .wcard { box-shadow: var(--shadow-3); }
.acc-b { transition: grid-template-rows 360ms var(--ease-out); }
.acc-in { transition: opacity 300ms var(--ease) 60ms, transform 360ms var(--ease-out); transform: translateY(-8px); }
.acc-h { border-radius: 10px; position: relative; overflow: hidden; transition: background var(--t-fast); }
.acc-h:hover { background: color-mix(in srgb, var(--surface-2) 60%, transparent); }
.acc[data-open="true"] .acc-h .ic:first-child { color: var(--accent); }

/* 盖章 + 飞出 */
.wcard { overflow: hidden; }
.stamp { position: absolute; left: 50%; top: 42%; z-index: 5; display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 16px; font: 700 22px/1 var(--font); border: 2.5px solid currentColor; background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); pointer-events: none; transform: translate(-50%, -50%) rotate(-8deg); box-shadow: var(--shadow-2); }
.stamp.r3 { color: var(--accent); } .stamp.r1 { color: var(--red); } .stamp.r2 { color: var(--amber); }

/* 水波纹 */
.btn, .rate button, .opt, .wchip, .chip-audio { position: relative; overflow: hidden; }
.ripple { position: absolute; border-radius: 50%; background: currentColor; opacity: .18; transform: scale(0); animation: ripple 620ms var(--ease-out) forwards; pointer-events: none; }
@keyframes ripple { to { transform: scale(1); opacity: 0; } }
.rate button { box-shadow: 0 1px 0 rgba(255,255,255,.4) inset; }
.rate .r3 { box-shadow: 0 8px 20px -10px color-mix(in srgb, var(--accent) 80%, transparent); }
.rate button:hover { transform: translateY(-1px); }
.rate button:active { transform: scale(.94); transition-duration: 60ms; }
.rate button.chosen { animation: chosen 420ms var(--spring); }
@keyframes chosen { 0% { transform: scale(.92); } 55% { transform: scale(1.06); } 100% { transform: scale(1); } }

/* 粒子 */
.particle { position: fixed; z-index: 80; width: 8px; height: 8px; border-radius: 50%; pointer-events: none; }

/* 进度条 */
.progress { height: 6px; border-radius: 3px; }
.progress i { position: relative; background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 70%, #7cc9a0), var(--accent)); transition: width 600ms var(--spring); }
.progress i::after { content: ""; position: absolute; right: 0; top: 50%; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); transform: translate(50%, -50%); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent); }
.session-bar .count { display: inline-block; }

/* 测验反馈 */
.qcard { box-shadow: var(--shadow-2); transition: box-shadow var(--t-slow); }
.qcard.glow-ok { animation: glowOk 900ms var(--ease-out); }
.qcard.glow-no { animation: glowNo 900ms var(--ease-out); }
@keyframes glowOk { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 45%, transparent), var(--shadow-2); } 100% { box-shadow: 0 0 0 18px transparent, var(--shadow-2); } }
@keyframes glowNo { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--red) 40%, transparent), var(--shadow-2); } 100% { box-shadow: 0 0 0 18px transparent, var(--shadow-2); } }
.opt { transition: border-color var(--t), background var(--t), transform var(--t-fast), opacity var(--t); }
.opt .mark { margin-left: auto; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; animation: markIn 420ms var(--spring) both; flex: none; }
.opt.right .mark { background: var(--accent); color: var(--accent-ink); }
.opt.wrong .mark { background: var(--red); color: #fff; }
@keyframes markIn { from { transform: scale(0) rotate(-45deg); } to { transform: none; } }
.opt.right { animation: okPop 420ms var(--spring); }
.opt.right.reveal { animation: reveal 900ms var(--ease) 200ms both; }
@keyframes okPop { 50% { transform: scale(1.025); } }
@keyframes reveal { 0%, 100% { box-shadow: 0 0 0 0 transparent; } 40% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 25%, transparent); } }
.opt.dim { opacity: .45; }
.score-ring { position: relative; width: 120px; height: 120px; margin: 0 auto 18px; }
.score-ring circle { stroke-width: 8; }
.score-ring b { position: absolute; inset: 0; display: grid; place-items: center; font: 700 40px var(--font-en); }
.done .badge { animation: pop 600ms var(--spring) both; }

/* 手机底部导航：活动项胶囊 + safe-area */
@media (max-width: 760px) {
  .tabbar { padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); box-shadow: 0 -8px 24px -16px rgba(0,0,0,.18); }
  .tabbar a { position: relative; }
  .tabbar a::before { content: ""; position: absolute; top: 8px; left: 50%; width: 56px; height: 30px; border-radius: 999px; background: var(--accent-soft); transform: translateX(-50%) scale(.4); opacity: 0; transition: transform 380ms var(--spring), opacity var(--t); }
  .tabbar a[aria-current="page"]::before { transform: translateX(-50%) scale(1); opacity: 1; }
  .tabbar a .ic, .tabbar a span { position: relative; }
  main { padding-left: max(16px, env(safe-area-inset-left)); padding-right: max(16px, env(safe-area-inset-right)); }
  .stamp { font-size: 19px; padding: 10px 18px; }
}
@media (prefers-reduced-motion: reduce) {
  .stagger > *, .enter .wcard > *, .enter + .rate, .enter .rate { animation: none !important; }
  .meter i, .today-ring .fg, .score-ring .fg, .progress i { transition: none !important; }
}

@keyframes fadeOnly { from { opacity: 0; } }
@media (max-width: 760px) { body.has-rate .view { animation-name: fadeOnly; } }
.stage > .rate:not(.sticky) { max-width: var(--cardw); }

/* 拼写变体、默认例句、词形 */
.spell-var { display: flex; align-items: center; gap: 6px; margin: 8px 0 0; font-size: 15px; color: var(--ink-2); flex-wrap: wrap; }
.spell-var b { font-weight: 600; margin-right: 8px; }
.ex-main { margin-top: 20px; padding: 16px 18px; border-radius: var(--r-md); background: var(--surface-2); }
.ex-tags { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; }
.ex-tags .pill .ic { margin-right: 2px; }
.ex-main .ex { margin: 0; }
.forms { display: grid; gap: 2px; }
.form-row { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--line); }
.form-row:last-child { border-bottom: 0; }
.form-row .fl { width: 72px; flex: none; color: var(--ink-3); font-size: 14px; }
.form-row b { font: 600 17px var(--font-en); color: var(--ink); }
.form-row.irr b { color: var(--amber); }
.lbl-sm { font-size: 13px; color: var(--ink-3); margin: 0 0 8px; }
.chips + .lbl-sm { margin-top: 14px; }

.seg-wrap { overflow-x: auto; margin: 0 -4px; padding: 0 4px; scrollbar-width: none; }
.seg-wrap::-webkit-scrollbar { display: none; }
.listen-btn { width: 88px; height: 88px; border-radius: 50%; display: grid; place-items: center; margin: 22px auto 6px; background: var(--accent-soft); color: var(--accent); transition: transform var(--t-fast) var(--ease), background var(--t-fast); position: relative; }
.listen-btn:hover { background: color-mix(in srgb, var(--accent) 18%, var(--surface)); }
.listen-btn:active { transform: scale(.94); }
.listen-btn.playing { animation: ring 1.2s var(--ease-out) infinite; }
@keyframes ring { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 35%, transparent); } 100% { box-shadow: 0 0 0 22px transparent; } }
.listen-btn + .hint { text-align: center; }

/* ---------- 词书（雅思 / 四级 / 六级） ---------- */
.book-badge { margin-left: 6px; font: 600 12px/1 var(--font); padding: 4px 7px; border-radius: 6px; background: var(--accent-soft); color: var(--accent); }
.book-switch { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; padding: 4px; margin: -12px 0 20px; background: var(--surface-2); border-radius: 14px; max-width: 520px; }
.book-switch a { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 9px 8px; border-radius: 11px; color: var(--ink-2); transition: background var(--t-fast), color var(--t-fast), box-shadow var(--t-fast), transform var(--t-fast); }
.book-switch a b { font-size: 15px; font-weight: 600; }
.book-switch a small { font-size: var(--f-micro); color: var(--ink-3); }
.book-switch a:hover { color: var(--ink); }
.book-switch a:active { transform: scale(.98); }
.book-switch a[aria-current="page"] { background: var(--surface); color: var(--ink); box-shadow: var(--shadow-1); }
.book-switch a[aria-current="page"] small { color: var(--accent); }
.pill-books { background: transparent; border: 1px solid var(--line); color: var(--ink-3); font-weight: 500; }
.scope-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin: -8px 0 18px; }
.results .lv { display: inline-flex; gap: 4px; }
.results .bk { font-style: normal; font-size: var(--f-micro); padding: 3px 6px; border-radius: 5px; background: var(--surface-2); color: var(--ink-3); }
.results .bk.cur { background: var(--accent-soft); color: var(--accent); }
@media (max-width: 640px) {
  .book-switch { margin: -14px 0 16px; max-width: none; }
  .book-switch a { padding: 8px 4px; }
}
/* 长单词在手机上整词缩小，不在词中间断行 */
.w-meta .pill { white-space: nowrap; }
.word.long { font-size: min(var(--f-word), calc((100vw - 150px) / (var(--len) * .6))); word-break: normal; overflow-wrap: anywhere; }

/* ---------- 备份 · 报错 · 隐私（上线必备） ---------- */
.btn-sm { height: 38px; padding: 0 14px; font-size: 14px; border-radius: 10px; gap: 6px; }
.backup-card { display: grid; grid-template-columns: auto 1fr auto; align-items: center; column-gap: 14px; row-gap: 12px; padding: 18px 22px; }
.backup-card .ico-wrap { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); flex: none; }
.backup-card .bk-text { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.backup-card .t { font-weight: 600; }
.backup-card .d { color: var(--ink-3); font-size: var(--f-small); }
.backup-card .d b { color: var(--ink-2); font-weight: 600; white-space: nowrap; }
.backup-card .bk-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.backup-card label.btn { cursor: pointer; }
.progress-backup { margin: 0 0 24px; }
.backup-banner { position: relative; display: grid; grid-template-columns: auto 1fr auto; align-items: center; column-gap: 14px; row-gap: 12px; padding: 16px 56px 16px 18px; margin: 0 0 24px; background: var(--amber-soft); border-color: color-mix(in srgb, var(--amber) 22%, transparent); }
.backup-banner .ico-wrap { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; background: var(--surface); color: var(--amber); flex: none; }
.backup-banner .bb-text { min-width: 0; display: flex; flex-direction: column; gap: 2px; font-size: var(--f-small); color: var(--ink-2); line-height: 1.55; }
.backup-banner .bb-text b { color: var(--ink); font-size: 15px; }
.backup-banner .bb-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.backup-banner .bb-close { position: absolute; top: 10px; right: 10px; width: 34px; height: 34px; }
@media (max-width: 760px) {
  .backup-card, .backup-banner { grid-template-columns: auto 1fr; align-items: start; }
  .backup-card { padding: 16px 18px; }
  .backup-banner { padding-right: 48px; }
  .backup-card .bk-actions, .backup-banner .bb-actions { grid-column: 2; }
}
.report-btn { display: inline-flex; align-items: center; gap: 4px; padding: 4px 8px; margin: -4px -6px -4px 4px; border-radius: 8px; font-size: 13px; color: var(--ink-3); white-space: nowrap; transition: background var(--t-fast), color var(--t-fast); }
.report-btn:hover, .report-btn:focus-visible { background: var(--surface-2); color: var(--ink); }
.status-line.report-only { justify-content: flex-end; }
.report-sheet { max-height: calc(100dvh - 24px); overflow-y: auto; }
.report-sheet .lbl, .report-sheet legend { display: block; font-size: var(--f-small); color: var(--ink-3); margin: 18px 0 8px; padding: 0; }
.report-sheet fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
.rp-type { position: relative; cursor: pointer; }
.rp-type input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.rp-type span { display: inline-flex; align-items: center; height: 36px; padding: 0 14px; border-radius: 10px; background: var(--surface-2); color: var(--ink-2); font-size: 14px; transition: background var(--t-fast), color var(--t-fast), box-shadow var(--t-fast); }
.rp-type input:checked + span { background: var(--accent-soft); color: var(--accent); font-weight: 600; box-shadow: 0 0 0 1.5px var(--accent) inset; }
.rp-type input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.report-sheet textarea.note { min-height: 84px; }
.rp-actions { flex-wrap: wrap; }
.rp-hint { margin-top: 12px !important; }
.set-row.wrap { flex-wrap: wrap; }
.set-row.wrap .t { flex: 1 1 220px; }
.set-row .bk-last { font-weight: 600; white-space: nowrap; }
.privacy-note { margin: 0; color: var(--ink-2); font-size: var(--f-small); line-height: 1.6; align-items: flex-start; }
.privacy-note .ic { color: var(--accent); flex: none; margin-top: 2px; }