/* ============ Jerry'实验室 · 全局样式 ============ */
:root {
  --bg: #06080b;
  --bg2: #0c1016;
  --panel: rgba(14, 18, 24, 0.78);
  --panel-solid: #10151c;
  --panel2: rgba(255, 255, 255, 0.035);
  --line: rgba(255, 255, 255, 0.08);
  --line2: rgba(255, 255, 255, 0.14);
  --text: #e9edf2;
  --text2: #b9c2cd;
  --muted: #7f8a98;
  --phy: #5cb8ff;
  --chem: #ffb35c;
  --bio: #5fd69c;
  --acc: #9ab8ff;
  --good: #4fd18b;
  --bad: #ff6b6b;
  --warn: #ffc457;
  --r: 14px;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", serif;
  --mono: "SF Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
body { overflow: hidden; }
button { font-family: inherit; }
a { color: inherit; }
::selection { background: rgba(120, 180, 255, .35); }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,.12); border-radius: 8px; }
::-webkit-scrollbar-track { background: transparent; }

#app { position: fixed; inset: 0; }
.subj-物理 { --acc: var(--phy); }
.subj-化学 { --acc: var(--chem); }
.subj-生物 { --acc: var(--bio); }

/* ---------- 通用组件 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 34px; padding: 0 14px; border-radius: 10px; border: 1px solid var(--line2); background: rgba(255,255,255,.05); color: var(--text); font-size: 13px; cursor: pointer; transition: background .15s, border-color .15s, transform .1s, opacity .15s; white-space: nowrap; }
.btn:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.22); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: color-mix(in srgb, var(--acc) 22%, transparent); border-color: color-mix(in srgb, var(--acc) 55%, transparent); color: #fff; }
.btn.primary:hover { background: color-mix(in srgb, var(--acc) 34%, transparent); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.ghost:hover { background: rgba(255,255,255,.07); }
.btn.sm { height: 28px; padding: 0 10px; font-size: 12px; border-radius: 8px; }
.btn.danger { border-color: rgba(255,107,107,.4); color: #ffb3b3; }
.btn[disabled] { opacity: .38; pointer-events: none; }
.btn.on { background: color-mix(in srgb, var(--acc) 30%, transparent); border-color: var(--acc); }
.pill { display: inline-flex; align-items: center; height: 22px; padding: 0 9px; border-radius: 99px; font-size: 11.5px; border: 1px solid var(--line2); color: var(--text2); background: rgba(255,255,255,.03); white-space: nowrap; }
.pill.acc { color: var(--acc); border-color: color-mix(in srgb, var(--acc) 45%, transparent); background: color-mix(in srgb, var(--acc) 10%, transparent); }
.kbd { font-family: var(--mono); font-size: 11px; padding: 1px 5px; border-radius: 4px; border: 1px solid var(--line2); color: var(--text2); }

/* ---------- 首页 ---------- */
.home { position: absolute; inset: 0; overflow-y: auto; overflow-x: hidden; scroll-behavior: smooth; }
.home-bg { position: fixed; inset: 0; z-index: 0; }
.home-bg canvas { display: block; }
.home-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6,8,11,.92) 0%, rgba(6,8,11,.55) 42%, rgba(6,8,11,.1) 75%), linear-gradient(0deg, rgba(6,8,11,1) 0%, rgba(6,8,11,0) 30%); pointer-events: none; }
.home-content { position: relative; z-index: 1; }
.hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding: 0 8vw; max-width: 1400px; }
.hero .eyebrow { font-size: 13px; letter-spacing: .32em; color: var(--muted); text-transform: uppercase; margin-bottom: 22px; display: flex; align-items: center; gap: 12px; }
.hero .eyebrow::before { content: ""; width: 36px; height: 1px; background: var(--muted); }
.hero h1 { font-family: var(--serif); font-weight: 600; font-size: clamp(52px, 8vw, 116px); line-height: 1; margin: 0; letter-spacing: .02em; background: linear-gradient(180deg, #fff 30%, #9aa6b6 100%); -webkit-background-clip: text; background-clip: text; color: transparent; text-shadow: 0 0 80px rgba(150,190,255,.12); }
.hero h1 .apos { color: #8fb6ff; -webkit-text-fill-color: #8fb6ff; }
.hero .sub { margin-top: 26px; font-size: 18px; color: var(--text2); max-width: 560px; line-height: 1.8; }
.hero .stats { display: flex; gap: 40px; margin-top: 44px; }
.hero .stat b { display: block; font-family: var(--serif); font-size: 38px; font-weight: 600; color: #fff; }
.hero .stat span { font-size: 12.5px; color: var(--muted); letter-spacing: .1em; }
.hero .cta { margin-top: 48px; display: flex; gap: 12px; }
.hero .cta .btn { height: 46px; padding: 0 24px; font-size: 15px; border-radius: 12px; }
.scroll-hint { position: absolute; bottom: 34px; left: 8vw; font-size: 12px; color: var(--muted); letter-spacing: .2em; animation: bob 2.4s ease-in-out infinite; }
@keyframes bob { 50% { transform: translateY(6px); opacity: .6; } }

.browser { padding: 40px 8vw 120px; min-height: 100vh; background: linear-gradient(180deg, rgba(6,8,11,0) 0, rgba(6,8,11,.94) 140px, rgba(6,8,11,.98) 100%); }
.browser h2 { font-family: var(--serif); font-size: 34px; font-weight: 600; margin: 0 0 6px; }
.browser .lead { color: var(--muted); margin: 0 0 28px; font-size: 14px; }
.filters { position: sticky; top: 0; z-index: 5; padding: 16px 0 14px; margin-bottom: 18px; background: rgba(6,8,11,.86); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--line); display: flex; flex-direction: column; gap: 12px; }
.frow { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.frow .lbl { font-size: 12px; color: var(--muted); width: 40px; letter-spacing: .1em; }
.seg { display: inline-flex; padding: 3px; border-radius: 12px; background: rgba(255,255,255,.04); border: 1px solid var(--line); gap: 2px; }
.seg button { height: 32px; padding: 0 16px; border: 0; border-radius: 9px; background: transparent; color: var(--text2); font-size: 13.5px; cursor: pointer; transition: all .15s; }
.seg button:hover { color: #fff; }
.seg button.on { background: rgba(255,255,255,.12); color: #fff; box-shadow: 0 1px 0 rgba(255,255,255,.08) inset; }
.seg.sseg button.on.s-物理 { background: color-mix(in srgb, var(--phy) 28%, transparent); }
.seg.sseg button.on.s-化学 { background: color-mix(in srgb, var(--chem) 28%, transparent); }
.seg.sseg button.on.s-生物 { background: color-mix(in srgb, var(--bio) 28%, transparent); }
.search { height: 36px; width: 260px; border-radius: 10px; border: 1px solid var(--line2); background: rgba(255,255,255,.04); color: var(--text); padding: 0 12px; font-size: 13.5px; outline: none; }
.search:focus { border-color: rgba(140,180,255,.5); }
.chk { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--text2); cursor: pointer; user-select: none; }
.chk input { accent-color: #7fb0ff; }
.count { margin-left: auto; font-size: 12.5px; color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 14px; }
.group-title { grid-column: 1 / -1; display: flex; align-items: baseline; gap: 12px; margin: 22px 0 2px; }
.group-title h3 { margin: 0; font-family: var(--serif); font-size: 20px; font-weight: 600; }
.group-title span { color: var(--muted); font-size: 12.5px; }
.card { position: relative; padding: 18px 18px 16px; border-radius: var(--r); background: linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,.02)); border: 1px solid var(--line); cursor: pointer; overflow: hidden; transition: transform .2s, border-color .2s, background .2s; min-height: 132px; display: flex; flex-direction: column; }
.card::before { content: ""; position: absolute; left: 0; top: 0; right: 0; height: 2px; background: linear-gradient(90deg, var(--acc), transparent 70%); opacity: .8; }
.card::after { content: ""; position: absolute; width: 220px; height: 220px; right: -90px; top: -110px; background: radial-gradient(closest-side, color-mix(in srgb, var(--acc) 22%, transparent), transparent); opacity: .0; transition: opacity .3s; }
.card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--acc) 40%, transparent); background: linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.025)); }
.card:hover::after { opacity: 1; }
.card .t { font-size: 15.5px; font-weight: 600; line-height: 1.45; margin-bottom: 8px; position: relative; z-index: 1; }
.card .b { font-size: 12px; color: var(--muted); line-height: 1.5; }
.card .tags { margin-top: auto; padding-top: 12px; display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.card .go { margin-left: auto; font-size: 12.5px; color: var(--acc); opacity: .9; }
.card.off { cursor: default; opacity: .5; }
.card.off:hover { transform: none; border-color: var(--line); }
.card.off::before { opacity: .25; }
.card.plan { cursor: default; opacity: .62; }
.card.plan:hover { transform: none; }
.empty { grid-column: 1/-1; padding: 60px 0; text-align: center; color: var(--muted); }

/* ---------- 实验页 ---------- */
.exp { position: absolute; inset: 0; background: #000; }
.viewport { position: absolute; inset: 0; }
.viewport canvas { display: block; outline: none; }
.css2d { position: absolute; inset: 0; pointer-events: none; }
.topbar { position: absolute; left: 0; right: 0; top: 0; height: 64px; display: flex; align-items: center; gap: 14px; padding: 0 18px; background: linear-gradient(180deg, rgba(0,0,0,.72), rgba(0,0,0,0)); z-index: 10; pointer-events: none; }
.topbar > * { pointer-events: auto; }
.topbar .title { font-family: var(--serif); font-size: 21px; font-weight: 600; letter-spacing: .02em; text-shadow: 0 2px 12px rgba(0,0,0,.6); }
.topbar .book { font-size: 12px; color: var(--text2); }
.topbar .sp { flex: 1; pointer-events: none; }
.topbar .views { display: flex; gap: 4px; }

.side { position: absolute; top: 70px; right: 14px; bottom: 14px; width: 392px; z-index: 9; display: flex; flex-direction: column; border-radius: 18px; background: var(--panel); border: 1px solid var(--line); backdrop-filter: blur(22px) saturate(1.2); -webkit-backdrop-filter: blur(22px) saturate(1.2); box-shadow: 0 20px 60px rgba(0,0,0,.45); overflow: hidden; transition: transform .35s cubic-bezier(.2,.8,.2,1), opacity .3s; }
.side.collapsed { transform: translateX(calc(100% + 20px)); opacity: 0; }
.tabs { display: flex; padding: 6px; gap: 4px; border-bottom: 1px solid var(--line); flex: none; }
.tabs button { flex: 1; height: 36px; border: 0; border-radius: 10px; background: transparent; color: var(--muted); font-size: 13.5px; cursor: pointer; transition: all .15s; position: relative; }
.tabs button:hover { color: var(--text); background: rgba(255,255,255,.04); }
.tabs button.on { color: #fff; background: rgba(255,255,255,.09); }
.tabs button .dot { position: absolute; top: 7px; right: 14px; width: 6px; height: 6px; border-radius: 6px; background: var(--acc); }
.tabpane { flex: 1; overflow-y: auto; padding: 16px 16px 30px; display: none; }
.tabpane.on { display: block; }
.side-toggle { position: absolute; right: 14px; top: 76px; z-index: 11; }

.sec { margin-bottom: 18px; }
.sec-h { font-size: 12px; color: var(--muted); letter-spacing: .12em; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
.sec-h::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; align-items: center; }
.row.tight { gap: 6px; }
.row > .btn { flex: 1 1 auto; }
.ctl { margin-bottom: 12px; }
.ctl-h { display: flex; justify-content: space-between; align-items: baseline; font-size: 13px; color: var(--text2); margin-bottom: 6px; }
.ctl-h b { font-family: var(--mono); color: #fff; font-weight: 500; font-size: 13px; }
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 22px; background: transparent; cursor: pointer; }
input[type=range]::-webkit-slider-runnable-track { height: 4px; border-radius: 4px; background: linear-gradient(90deg, var(--acc) var(--p, 50%), rgba(255,255,255,.12) var(--p, 50%)); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%; background: #fff; margin-top: -6px; box-shadow: 0 0 0 4px color-mix(in srgb, var(--acc) 30%, transparent), 0 2px 6px rgba(0,0,0,.4); }
select.sel { width: 100%; height: 34px; border-radius: 10px; border: 1px solid var(--line2); background: rgba(255,255,255,.05); color: var(--text); padding: 0 10px; font-size: 13px; outline: none; }
select.sel option { background: #161b22; }
.readouts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.readout { padding: 10px 12px; border-radius: 12px; background: var(--panel2); border: 1px solid var(--line); }
.readout .k { font-size: 11.5px; color: var(--muted); }
.readout .v { font-family: var(--mono); font-size: 18px; color: #fff; margin-top: 3px; }
.readout .v small { font-size: 12px; color: var(--text2); margin-left: 3px; }
.readout.wide { grid-column: 1 / -1; }
.note { font-size: 12.5px; color: var(--text2); line-height: 1.7; padding: 10px 12px; border-radius: 10px; background: rgba(255,255,255,.03); border: 1px dashed var(--line2); margin-bottom: 10px; }
.note b { color: #fff; }
.note.warn { border-color: rgba(255,196,87,.35); background: rgba(255,196,87,.06); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.chip { height: 30px; padding: 0 11px; border-radius: 9px; border: 1px solid var(--line2); background: rgba(255,255,255,.04); color: var(--text2); font-size: 12.5px; cursor: pointer; transition: all .12s; display: inline-flex; align-items: center; gap: 6px; }
.chip:hover { color: #fff; border-color: rgba(255,255,255,.25); }
.chip.on { color: #fff; border-color: var(--acc); background: color-mix(in srgb, var(--acc) 20%, transparent); }
.chip .sw { width: 10px; height: 10px; border-radius: 3px; border: 1px solid rgba(255,255,255,.25); }
.svgbox { border-radius: 12px; background: rgba(255,255,255,.03); border: 1px solid var(--line); padding: 8px; margin-bottom: 10px; }
.svgbox svg { display: block; width: 100%; height: auto; }

/* 原理 / 器材 / 题目 内容 */
.doc { font-size: 13.5px; line-height: 1.85; color: var(--text2); }
.doc h4 { color: #fff; font-size: 14.5px; margin: 20px 0 8px; display: flex; align-items: center; gap: 8px; }
.doc h4::before { content: ""; width: 3px; height: 14px; border-radius: 3px; background: var(--acc); }
.doc h4:first-child { margin-top: 0; }
.doc p { margin: 0 0 8px; }
.doc ul, .doc ol { margin: 0 0 8px; padding-left: 20px; }
.doc li { margin-bottom: 4px; }
.doc b, .doc strong { color: #fff; font-weight: 600; }
.doc .katex { font-size: 1.05em; color: #fff; }
.formula { padding: 12px 14px; border-radius: 12px; background: linear-gradient(135deg, color-mix(in srgb, var(--acc) 10%, transparent), rgba(255,255,255,.02)); border: 1px solid color-mix(in srgb, var(--acc) 25%, transparent); margin-bottom: 8px; }
.formula .f { text-align: center; padding: 4px 0; overflow-x: auto; }
.formula .f .katex { font-size: 1.25em; }
.formula .d { font-size: 12px; color: var(--muted); text-align: center; }
.exam { padding: 10px 12px; border-radius: 10px; background: rgba(255,196,87,.05); border: 1px solid rgba(255,196,87,.2); margin-bottom: 8px; }
.exam b { color: var(--warn); }
.equip { display: flex; gap: 12px; padding: 12px; border-radius: 12px; background: var(--panel2); border: 1px solid var(--line); margin-bottom: 8px; transition: border-color .15s; }
.equip:hover { border-color: var(--line2); }
.equip .ic { flex: none; width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; background: color-mix(in srgb, var(--acc) 14%, transparent); color: var(--acc); font-family: var(--serif); font-size: 16px; font-weight: 600; }
.equip .n { color: #fff; font-size: 14px; font-weight: 600; margin-bottom: 2px; display: flex; align-items: center; gap: 8px; }
.equip .n .btn { margin-left: auto; }
.equip .ds { font-size: 12.5px; color: var(--text2); line-height: 1.7; }

.quiz-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.quiz-head .score { margin-left: auto; font-family: var(--mono); font-size: 13px; color: var(--text2); }
.q { padding: 14px; border-radius: 14px; background: var(--panel2); border: 1px solid var(--line); margin-bottom: 12px; }
.q .qh { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.q .qn { font-family: var(--mono); font-size: 12px; color: var(--acc); }
.q .qt { font-size: 13.5px; line-height: 1.8; color: var(--text); margin-bottom: 10px; }
.q .opt { display: flex; gap: 10px; align-items: flex-start; width: 100%; text-align: left; padding: 9px 11px; margin-bottom: 6px; border-radius: 10px; border: 1px solid var(--line); background: rgba(255,255,255,.02); color: var(--text2); font-size: 13px; line-height: 1.6; cursor: pointer; transition: all .12s; }
.q .opt:hover { border-color: var(--line2); color: #fff; }
.q .opt .L { flex: none; width: 20px; height: 20px; border-radius: 6px; display: grid; place-items: center; font-size: 11.5px; border: 1px solid var(--line2); font-family: var(--mono); }
.q .opt.sel { border-color: var(--acc); color: #fff; background: color-mix(in srgb, var(--acc) 12%, transparent); }
.q .opt.right { border-color: var(--good); background: rgba(79,209,139,.12); color: #fff; }
.q .opt.wrong { border-color: var(--bad); background: rgba(255,107,107,.1); }
.q .fill { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; flex-wrap: wrap; font-size: 13px; }
.q .fill input { width: 110px; height: 32px; border-radius: 8px; border: 1px solid var(--line2); background: rgba(255,255,255,.05); color: #fff; padding: 0 10px; font-family: var(--mono); font-size: 13px; outline: none; }
.q .fill input.right { border-color: var(--good); }
.q .fill input.wrong { border-color: var(--bad); }
.q .exp-box { display: none; margin-top: 10px; padding: 10px 12px; border-radius: 10px; font-size: 12.5px; line-height: 1.8; color: var(--text2); background: rgba(255,255,255,.03); border-left: 3px solid var(--acc); }
.q.done .exp-box { display: block; }
.q .verdict { font-size: 12.5px; margin-left: auto; }
.q .verdict.ok { color: var(--good); }
.q .verdict.no { color: var(--bad); }

/* 任务 & 数据 */
.tasks { position: absolute; left: 14px; top: 70px; width: 300px; z-index: 8; border-radius: 16px; background: var(--panel); border: 1px solid var(--line); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); padding: 12px 14px; transition: opacity .3s; max-height: 46vh; overflow-y: auto; }
.tasks .th { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; margin-bottom: 8px; cursor: pointer; user-select: none; }
.tasks .th .prog { margin-left: auto; font-family: var(--mono); font-size: 12px; color: var(--muted); font-weight: 400; }
.tasks .bar { height: 3px; border-radius: 3px; background: rgba(255,255,255,.08); overflow: hidden; margin-bottom: 10px; }
.tasks .bar i { display: block; height: 100%; background: var(--acc); width: 0; transition: width .5s; }
.tasks.min .list { display: none; }
.task { display: flex; gap: 9px; font-size: 12.5px; line-height: 1.6; color: var(--text2); padding: 4px 0; transition: color .3s; }
.task .cb { flex: none; width: 16px; height: 16px; margin-top: 2px; border-radius: 5px; border: 1.5px solid var(--line2); display: grid; place-items: center; transition: all .3s; }
.task.ok { color: var(--muted); }
.task.ok span { text-decoration: line-through; text-decoration-color: rgba(255,255,255,.25); }
.task.ok .cb { background: var(--good); border-color: var(--good); }
.task.ok .cb::after { content: ""; width: 7px; height: 4px; border-left: 2px solid #06200f; border-bottom: 2px solid #06200f; transform: rotate(-45deg) translate(1px,-1px); }
.task.flash { animation: flash .9s; }
@keyframes flash { 30% { color: #fff; background: rgba(79,209,139,.12); } }

.drawer { position: absolute; left: 14px; bottom: 14px; width: min(620px, calc(100vw - 440px)); z-index: 8; border-radius: 16px; background: var(--panel); border: 1px solid var(--line); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); overflow: hidden; transition: height .3s; }
.drawer .dh { display: flex; align-items: center; gap: 4px; padding: 6px 8px; border-bottom: 1px solid transparent; }
.drawer.open .dh { border-bottom-color: var(--line); }
.drawer .dh .btn { height: 28px; font-size: 12.5px; }
.drawer .db { display: none; height: 250px; overflow: auto; padding: 10px 12px; }
.drawer.open .db { display: block; }
.drawer .pane { display: none; height: 100%; }
.drawer .pane.on { display: block; }
.dtable { width: 100%; border-collapse: collapse; font-size: 12.5px; font-family: var(--mono); }
.dtable th { text-align: left; font-weight: 500; color: var(--muted); padding: 6px 8px; border-bottom: 1px solid var(--line); font-family: var(--sans); position: sticky; top: -10px; background: var(--panel-solid); }
.dtable td { padding: 6px 8px; border-bottom: 1px solid rgba(255,255,255,.04); color: var(--text); }
.dtable tr:last-child td { border-bottom: 0; }
.dtable tr.new td { animation: rowin 1s; }
@keyframes rowin { from { background: color-mix(in srgb, var(--acc) 25%, transparent); } }
.obslog { font-size: 12.5px; line-height: 1.7; }
.obslog div { padding: 5px 0; border-bottom: 1px solid rgba(255,255,255,.04); display: flex; gap: 10px; }
.obslog time { font-family: var(--mono); color: var(--muted); flex: none; }
.chartbox { display: flex; gap: 10px; height: 100%; }
.chartbox canvas { flex: 1; min-width: 0; }

/* 浮层 */
.tip { position: absolute; z-index: 30; pointer-events: none; padding: 6px 10px; border-radius: 9px; background: rgba(10,13,18,.92); border: 1px solid var(--line2); font-size: 12.5px; white-space: nowrap; transform: translate(14px, 14px); opacity: 0; transition: opacity .12s; }
.tip.on { opacity: 1; }
.tip small { color: var(--muted); margin-left: 6px; }
.amenu { position: absolute; z-index: 31; min-width: 180px; padding: 6px; border-radius: 14px; background: rgba(14,18,24,.96); border: 1px solid var(--line2); box-shadow: 0 16px 40px rgba(0,0,0,.5); backdrop-filter: blur(16px); animation: pop .15s ease-out; }
@keyframes pop { from { opacity: 0; transform: translateY(-4px) scale(.98); } }
.amenu .ah { font-size: 12px; color: var(--muted); padding: 6px 10px 8px; border-bottom: 1px solid var(--line); margin-bottom: 4px; }
.amenu .ah b { color: #fff; font-size: 13px; display: block; margin-bottom: 2px; }
.amenu button { display: flex; width: 100%; align-items: center; gap: 8px; text-align: left; height: 34px; padding: 0 10px; border: 0; border-radius: 9px; background: transparent; color: var(--text); font-size: 13px; cursor: pointer; }
.amenu button:hover { background: rgba(255,255,255,.08); }
.amenu button[disabled] { opacity: .35; pointer-events: none; }
.amenu .sub { font-size: 11px; color: var(--muted); margin-left: auto; }
.amenu .grp { font-size: 11px; color: var(--muted); padding: 8px 10px 4px; }
.toasts { position: absolute; top: 76px; left: 50%; transform: translateX(-50%); z-index: 40; display: flex; flex-direction: column; align-items: center; gap: 8px; pointer-events: none; }
.toast { padding: 10px 16px; border-radius: 12px; background: rgba(12,16,22,.92); border: 1px solid var(--line2); font-size: 13.5px; box-shadow: 0 10px 30px rgba(0,0,0,.4); animation: tin .35s cubic-bezier(.2,.9,.3,1.3); max-width: 560px; text-align: center; line-height: 1.6; }
.toast.obs { border-color: color-mix(in srgb, var(--acc) 50%, transparent); }
.toast.obs::before { content: "现象 "; color: var(--acc); font-weight: 600; }
.toast.warn { border-color: rgba(255,196,87,.55); }
.toast.warn::before { content: "注意 "; color: var(--warn); font-weight: 600; }
.toast.bad { border-color: rgba(255,107,107,.6); }
.toast.bad::before { content: "错误 "; color: var(--bad); font-weight: 600; }
.toast.good { border-color: rgba(79,209,139,.6); }
.toast.out { animation: tout .4s forwards; }
@keyframes tin { from { opacity: 0; transform: translateY(-10px) scale(.96); } }
@keyframes tout { to { opacity: 0; transform: translateY(-8px); } }

.lbl3d { padding: 3px 8px; border-radius: 7px; background: rgba(8,11,15,.82); border: 1px solid var(--line2); font-size: 12px; color: #fff; font-family: var(--mono); white-space: nowrap; transform: translateY(-14px); }
.lbl3d.big { font-size: 14px; padding: 5px 10px; }
.lbl3d.acc { border-color: color-mix(in srgb, var(--acc) 55%, transparent); }
.lbl3d.plain { background: transparent; border: 0; font-family: var(--sans); text-shadow: 0 1px 4px #000; color: var(--text2); }

/* 开场字幕 */
.intro { position: absolute; inset: 0; z-index: 50; pointer-events: none; }
.intro .lb { position: absolute; left: 0; right: 0; height: 11vh; background: #000; transition: transform 1.2s cubic-bezier(.7,0,.2,1); }
.intro .lb.t { top: 0; } .intro .lb.b { bottom: 0; }
.intro.out .lb.t { transform: translateY(-100%); }
.intro.out .lb.b { transform: translateY(100%); }
.intro .card2 { position: absolute; left: 7vw; bottom: 17vh; opacity: 0; animation: cardin 1s .25s forwards; transition: opacity .8s; }
.intro.out .card2 { opacity: 0 !important; }
.intro .card2 .k { font-size: 12px; letter-spacing: .38em; color: var(--acc); margin-bottom: 14px; }
.intro .card2 .n { font-family: var(--serif); font-size: clamp(30px, 4.2vw, 56px); font-weight: 600; text-shadow: 0 4px 30px rgba(0,0,0,.8); }
.intro .card2 .s { margin-top: 10px; color: var(--text2); font-size: 14px; }
@keyframes cardin { from { opacity: 0; transform: translateY(14px); filter: blur(6px); } to { opacity: 1; transform: none; filter: none; } }
.loading { position: absolute; inset: 0; display: grid; place-items: center; z-index: 60; background: var(--bg); color: var(--muted); font-size: 13px; letter-spacing: .2em; transition: opacity .6s; }
.loading.out { opacity: 0; pointer-events: none; }
.loading .ring { width: 38px; height: 38px; border-radius: 50%; border: 2px solid rgba(255,255,255,.08); border-top-color: var(--acc); animation: spin 1s linear infinite; margin: 0 auto 16px; }
@keyframes spin { to { transform: rotate(360deg); } }

.complete { position: absolute; inset: 0; z-index: 45; display: grid; place-items: center; background: rgba(0,0,0,.45); backdrop-filter: blur(4px); animation: fadein .4s; }
@keyframes fadein { from { opacity: 0; } }
.complete .box { padding: 30px 36px; border-radius: 22px; background: var(--panel-solid); border: 1px solid color-mix(in srgb, var(--acc) 40%, transparent); text-align: center; max-width: 420px; box-shadow: 0 30px 80px rgba(0,0,0,.6), 0 0 80px color-mix(in srgb, var(--acc) 18%, transparent); }
.complete h3 { font-family: var(--serif); font-size: 28px; margin: 0 0 10px; }
.complete p { color: var(--text2); font-size: 14px; line-height: 1.7; margin: 0 0 20px; }
.complete .row { justify-content: center; }

.eyepiece { position: absolute; z-index: 20; left: 50%; top: 52%; transform: translate(-50%, -50%); pointer-events: none; display: none; }
.eyepiece.on { display: block; }

@media (max-width: 980px) {
  .side { width: calc(100vw - 28px); top: auto; height: 46vh; }
  .tasks { width: 240px; }
  .drawer { display: none; }
}

/* ---------- 自由模式 ---------- */
.exp.free .topbar { background: linear-gradient(180deg, rgba(0,0,0,.55), rgba(0,0,0,0)); }
.dock { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); z-index: 12; display: flex; flex-direction: column; gap: 8px; padding: 8px; border-radius: 18px; background: rgba(12,15,20,.55); border: 1px solid var(--line); backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3); transition: right .35s cubic-bezier(.2,.8,.2,1); }
.exp.free .side:not(.collapsed) ~ .dock { right: 420px; }
.dock button { width: 52px; height: 52px; border: 0; border-radius: 13px; background: transparent; color: var(--text2); cursor: pointer; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; transition: all .15s; }
.dock button i { font-style: normal; font-size: 18px; line-height: 1; font-family: var(--serif); }
.dock button span { font-size: 10.5px; letter-spacing: .08em; }
.dock button:hover { background: rgba(255,255,255,.08); color: #fff; }
.dock button.on { background: color-mix(in srgb, var(--acc) 26%, transparent); color: #fff; }
.hints { position: absolute; left: 16px; bottom: 64px; z-index: 30; display: flex; flex-direction: column; gap: 8px; width: min(420px, calc(100vw - 32px)); pointer-events: none; }
.hint { pointer-events: auto; position: relative; padding: 11px 34px 11px 14px; border-radius: 14px; background: rgba(12,15,20,.78); border: 1px solid var(--line2); backdrop-filter: blur(18px) saturate(1.3); -webkit-backdrop-filter: blur(18px) saturate(1.3); font-size: 13.5px; line-height: 1.65; color: var(--text); box-shadow: 0 12px 34px rgba(0,0,0,.35); animation: hin .45s cubic-bezier(.2,.9,.3,1.2); }
.hint b { color: var(--acc); margin-right: 8px; font-weight: 600; }
.hint span b { color: #fff; margin: 0; }
.hint.warn { border-color: rgba(255,196,87,.5); } .hint.warn > b { color: var(--warn); }
.hint.bad { border-color: rgba(255,107,107,.55); } .hint.bad > b { color: var(--bad); }
.hint.good { border-color: rgba(79,209,139,.5); } .hint.good > b { color: var(--good); }
.hint.obs > b { color: var(--acc); }
.hint .x { position: absolute; right: 8px; top: 8px; width: 20px; height: 20px; border: 0; border-radius: 6px; background: transparent; color: var(--muted); cursor: pointer; font-size: 14px; line-height: 1; }
.hint .x:hover { background: rgba(255,255,255,.08); color: #fff; }
.hint.out { animation: hout .45s forwards; }
@keyframes hin { from { opacity: 0; transform: translateX(-16px) scale(.97); filter: blur(4px); } }
@keyframes hout { to { opacity: 0; transform: translateX(-12px); } }
.legend { position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%); z-index: 11; display: none; gap: 16px; padding: 8px 16px; border-radius: 12px; background: rgba(12,15,20,.55); border: 1px solid var(--line); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); font-size: 12px; color: var(--text2); white-space: nowrap; }
.legend.on { display: flex; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend kbd { font-family: var(--sans); font-size: 11px; padding: 2px 7px; border-radius: 6px; background: rgba(255,255,255,.1); border: 1px solid var(--line2); color: #fff; }
.exp.free .drawer { left: auto; right: 90px; bottom: 16px; width: min(520px, calc(100vw - 560px)); }
.exp.free .drawer:not(.open) { width: auto; }
.tasks.goals { top: 74px; width: 280px; padding: 10px 14px; background: rgba(12,15,20,.55); }
.tasks.goals.min { width: auto; }
.tasks.goals.min .bar { margin-bottom: 0; }
.eyehud { position: absolute; right: 90px; bottom: 300px; z-index: 13; width: 220px; padding: 12px 14px; border-radius: 16px; background: rgba(10,13,18,.78); border: 1px solid var(--line2); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); opacity: 0; transform: translateY(8px); transition: opacity .3s, transform .3s; pointer-events: none; }
.eyehud.on { opacity: 1; transform: none; pointer-events: auto; }
.eyehud .eh-k { font-size: 11.5px; color: var(--muted); letter-spacing: .12em; }
.eyehud .eh-v { font-family: var(--mono); font-size: 30px; color: #fff; margin: 4px 0 2px; }
.eyehud .eh-s { font-size: 12px; color: var(--text2); line-height: 1.6; min-height: 19px; }
.eyehud .eh-s b { color: var(--warn); }
.eyehud[data-st=level] { border-color: rgba(79,209,139,.6); box-shadow: 0 0 40px rgba(79,209,139,.15); }
.eyehud[data-st=level] .eh-s { color: var(--good); }
.eyehud .eh-b { position: absolute; right: 12px; top: 12px; }
.loupe { position: absolute; right: 90px; bottom: 70px; z-index: 13; width: 220px; height: 220px; border-radius: 50%; pointer-events: none; opacity: 0; transition: opacity .25s; }
.loupe.on { opacity: 1; }
.loupe .lp-ring { position: absolute; inset: -4px; border-radius: 50%; border: 5px solid #1a1d22; box-shadow: 0 0 0 1px rgba(255,255,255,.25), 0 0 0 80px rgba(6,8,11,0), inset 0 0 18px rgba(0,0,0,.6), 0 18px 40px rgba(0,0,0,.5); background: radial-gradient(circle at 50% 50%, transparent 70%, rgba(6,8,11,.0) 70.5%); }
.loupe .lp-cap { position: absolute; left: 50%; bottom: -26px; transform: translateX(-50%); font-size: 11px; letter-spacing: .2em; color: var(--muted); }
.challenge { position: absolute; left: 16px; top: 74px; z-index: 12; padding: 12px 14px; border-radius: 16px; background: rgba(12,15,20,.62); border: 1px solid var(--line2); backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3); min-width: 220px; }
.challenge .ck { font-size: 11px; letter-spacing: .3em; color: var(--acc); }
.challenge .cv { font-size: 16px; margin: 6px 0 10px; color: var(--text); }
.challenge .cv b { font-family: var(--mono); font-size: 20px; color: #fff; }
.challenge .cr { display: flex; gap: 8px; }
.exp.free .tasks.goals { top: auto; bottom: 64px; left: auto; right: 90px; }
.lbl3d.small { font-size: 11px; }
.readcard { position: absolute; left: 50%; top: 84px; transform: translate(-50%, -8px); z-index: 12; padding: 12px 16px; border-radius: 16px; background: rgba(12,15,20,.72); border: 1px solid rgba(79,209,139,.5); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s; box-shadow: 0 0 40px rgba(79,209,139,.12); }
.readcard.on { opacity: 1; pointer-events: auto; transform: translate(-50%, 0); }
.readcard .ck { font-size: 13px; color: var(--good); font-weight: 600; }
.readcard .cs { font-size: 12.5px; color: var(--text2); margin: 4px 0 10px; }
.readcard .cs b { color: #fff; }
.readcard .cr { display: flex; gap: 8px; }
.readcard input { width: 120px; height: 30px; border-radius: 8px; border: 1px solid var(--line2); background: rgba(255,255,255,.06); color: #fff; padding: 0 10px; font-family: var(--mono); outline: none; }

/* ---------- 首页 v2 ---------- */
.veil { position: fixed; inset: 0; z-index: 100; background: #030405; display: grid; place-items: center; transition: opacity 1.3s ease; }
.veil.out { opacity: 0; pointer-events: none; }
.veil.quick { transition-duration: .4s; }
.veil .vl-in { text-align: center; }
.veil .vl-brand { font-family: var(--serif); font-size: 15px; letter-spacing: .6em; color: #cfd6de; padding-left: .6em; animation: vlb 2.4s ease-in-out infinite; }
.veil .vl-line { width: 220px; height: 1px; margin: 22px auto 16px; background: rgba(255,255,255,.08); overflow: hidden; }
.veil .vl-line i { display: block; height: 100%; width: 40%; background: linear-gradient(90deg, transparent, #ffd9a8, transparent); animation: vll 1.6s cubic-bezier(.6,0,.4,1) infinite; }
.veil .vl-sub { font-size: 11px; letter-spacing: .4em; color: #5a636e; }
@keyframes vll { from { transform: translateX(-100%); } to { transform: translateX(260%); } }
@keyframes vlb { 50% { opacity: .55; } }
.home-bg::after { background: radial-gradient(120% 90% at 78% 45%, rgba(6,8,11,0) 35%, rgba(6,8,11,.5) 100%), linear-gradient(90deg, rgba(5,6,8,.88) 0%, rgba(5,6,8,.55) 30%, rgba(5,6,8,0) 52%), linear-gradient(0deg, rgba(6,8,11,1) 0%, rgba(6,8,11,0) 22%); }
.hero { padding: 0 6vw; max-width: 720px; transition: opacity .2s; }
.hero > * { opacity: 0; transform: translateY(18px); filter: blur(8px); transition: opacity 1.2s cubic-bezier(.2,.8,.2,1), transform 1.2s cubic-bezier(.2,.8,.2,1), filter 1.2s; }
.home.playing .hero .eyebrow { transition-delay: 2.6s; }
.home.playing .hero .sub { transition-delay: 3.6s; }
.home.playing .hero .subjects { transition-delay: 4.2s; }
.home.playing .hero .stats { transition-delay: 4.8s; }
.home.playing .hero > * { opacity: 1; transform: none; filter: none; }
.home.playing .hero .ttl { opacity: 1; transform: none; filter: none; transition: none; }
.hero .ttl { font-family: var(--serif); font-weight: 600; font-size: clamp(56px, 7.6vw, 124px); line-height: 1.02; margin: 0; letter-spacing: .01em; color: #fff; white-space: nowrap; }
.hero .ttl span { display: inline-block; opacity: 0; transform: translateY(.35em) scale(.96); filter: blur(14px); background: linear-gradient(180deg, #ffffff 35%, #b9c3cf 100%); -webkit-background-clip: text; background-clip: text; color: transparent; text-shadow: none; }
.home.playing .hero .ttl span { animation: ttlin 1.6s cubic-bezier(.2,.8,.2,1) forwards; animation-delay: calc(2.1s + var(--i) * .09s); }
.hero .ttl span.apos { background: linear-gradient(180deg, #ffd9a8, #ff9f5a); -webkit-background-clip: text; background-clip: text; }
@keyframes ttlin { to { opacity: 1; transform: none; filter: none; } }
.home.quick .hero > *, .home.quick .hero .ttl span, .home.quick .scroll-hint { transition-delay: 0s !important; animation-delay: 0s !important; animation-duration: .6s !important; transition-duration: .6s !important; }
.hero .eyebrow { margin-bottom: 26px; color: #aeb8c4; }
.hero .eyebrow::before { background: linear-gradient(90deg, transparent, #ffd9a8); }
.hero .sub { margin-top: 24px; font-size: 17px; color: #c9d1da; max-width: 540px; line-height: 1.85; text-shadow: 0 1px 20px rgba(0,0,0,.6); }
.subjects { display: flex; flex-direction: column; gap: 10px; margin-top: 34px; max-width: 470px; }
.subj { --acc: #9ab8ff; display: flex; align-items: center; gap: 16px; width: 100%; padding: 14px 18px; border-radius: 18px; border: 1px solid rgba(255,255,255,.1); background: linear-gradient(110deg, rgba(255,255,255,.07), rgba(255,255,255,.02)); backdrop-filter: blur(14px) saturate(1.4); -webkit-backdrop-filter: blur(14px) saturate(1.4); color: #fff; cursor: pointer; text-align: left; font-family: inherit; transition: transform .35s cubic-bezier(.2,.8,.2,1), border-color .3s, background .3s, box-shadow .3s, opacity .3s; position: relative; overflow: hidden; }
.subj::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 120% at 0% 50%, color-mix(in srgb, var(--acc) 30%, transparent), transparent 70%); opacity: 0; transition: opacity .35s; }
.subj:hover, .subj:focus-visible { transform: translateX(10px); border-color: color-mix(in srgb, var(--acc) 60%, transparent); box-shadow: 0 18px 50px rgba(0,0,0,.35), 0 0 0 1px color-mix(in srgb, var(--acc) 25%, transparent) inset; outline: none; }
.subj:hover::before, .subj:focus-visible::before { opacity: 1; }
.subjects[data-focus]:not([data-focus=""]) .subj:not(:hover) { opacity: .55; }
.subj .ic { position: relative; flex: none; width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; background: color-mix(in srgb, var(--acc) 16%, transparent); border: 1px solid color-mix(in srgb, var(--acc) 35%, transparent); }
.subj .ic svg { width: 28px; height: 28px; fill: none; stroke: var(--acc); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.subj .tx { position: relative; flex: 1; display: flex; flex-direction: column; gap: 3px; }
.subj .tx b { font-family: var(--serif); font-size: 22px; font-weight: 600; letter-spacing: .08em; }
.subj .tx span { font-size: 12.5px; color: var(--text2); letter-spacing: .08em; }
.subj .n { position: relative; text-align: right; }
.subj .n b { display: block; font-family: var(--serif); font-size: 26px; color: var(--acc); }
.subj .n span { font-size: 11px; color: var(--muted); }
.hero .stats { margin-top: 30px; gap: 36px; }
.hero .stat b { font-size: 30px; }
.scroll-hint { position: absolute; bottom: 30px; left: 6vw; display: flex; align-items: center; gap: 12px; background: none; border: 0; color: #aeb8c4; font-size: 12.5px; letter-spacing: .3em; cursor: pointer; opacity: 0; transition: opacity 1s 5.4s; font-family: inherit; }
.home.playing .scroll-hint { opacity: 1; }
.scroll-hint i { width: 1px; height: 34px; background: linear-gradient(180deg, #ffd9a8, transparent); animation: bob 2.4s ease-in-out infinite; }
.card.free { border-color: rgba(255,200,140,.28); background: linear-gradient(180deg, rgba(255,190,120,.09), rgba(255,255,255,.02)); }
.pill.freep { color: #ffd9a8; border-color: rgba(255,200,140,.5); background: rgba(255,190,120,.12); }
@media (max-width: 1100px) { .home-bg::after { background: linear-gradient(0deg, rgba(6,8,11,.95) 0%, rgba(6,8,11,.4) 60%, rgba(6,8,11,.2) 100%); } .hero { max-width: none; } }
.coach { position: absolute; inset: 0; z-index: 48; display: flex; flex-direction: column; align-items: center; justify-content: center; background: radial-gradient(60% 60% at 50% 50%, rgba(6,8,11,.55), rgba(6,8,11,.25)); backdrop-filter: blur(2px); animation: fadein .5s; cursor: pointer; }
.coach.out { animation: hout .5s forwards; }
.coach .ch-t { font-family: var(--serif); font-size: 28px; margin-bottom: 22px; letter-spacing: .2em; }
.coach .ch-g { display: grid; grid-template-columns: repeat(4, 180px); gap: 14px; }
.coach .ch-g > div { padding: 18px 16px; border-radius: 18px; background: rgba(14,18,24,.72); border: 1px solid var(--line2); text-align: center; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.coach .ch-g b { font-size: 15px; } .coach .ch-g span { font-size: 12.5px; color: var(--text2); line-height: 1.6; }
.coach i { width: 46px; height: 46px; border-radius: 12px; border: 2px solid rgba(255,217,168,.7); position: relative; }
.coach i::after { content: ""; position: absolute; width: 10px; height: 10px; border-radius: 50%; background: #ffd9a8; left: 16px; top: 16px; }
.coach i.g-drag::after { animation: gdrag 1.8s ease-in-out infinite; }
.coach i.g-click::after { animation: gclick 1.2s ease-in-out infinite; }
.coach i.g-wheel::after { width: 6px; height: 16px; border-radius: 4px; left: 18px; top: 13px; animation: gwheel 1.2s ease-in-out infinite; }
.coach i.g-rot { border-radius: 50%; } .coach i.g-rot::after { animation: grot 2s linear infinite; transform-origin: 5px 19px; left: 16px; top: 2px; }
@keyframes gdrag { 0%,100% { transform: translate(-10px, 6px); } 50% { transform: translate(10px, -6px); } }
@keyframes gclick { 0%,100% { transform: scale(1); opacity: 1; } 50% { transform: scale(.55); opacity: .6; } }
@keyframes gwheel { 0%,100% { transform: translateY(-6px); } 50% { transform: translateY(6px); } }
@keyframes grot { to { transform: rotate(360deg); } }
/* 手持操作栏 */
.holdbar { position: absolute; left: 50%; bottom: 58px; transform: translate(-50%, 12px); z-index: 14; display: flex; align-items: center; gap: 10px; padding: 10px 12px 10px 16px; border-radius: 18px; background: rgba(12,15,20,.8); border: 1px solid var(--line2); backdrop-filter: blur(18px) saturate(1.3); -webkit-backdrop-filter: blur(18px) saturate(1.3); box-shadow: 0 16px 44px rgba(0,0,0,.4); opacity: 0; pointer-events: none; transition: opacity .2s, transform .25s; max-width: calc(100vw - 32px); flex-wrap: wrap; }
.holdbar.on { opacity: 1; pointer-events: auto; transform: translate(-50%, 0); }
.holdbar .hb-info { display: flex; flex-direction: column; gap: 2px; min-width: 200px; }
.holdbar .hb-t { font-size: 14px; }
.holdbar .hb-s { font-size: 12px; color: var(--text2); }
.holdbar .hb-s i.ok { color: #7fe0ff; font-style: normal; margin-right: 4px; }
.holdbar .hb-tiltbox { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--text2); }
.holdbar .hb-tilt { width: 150px; }
.holdbar .hb-pour { position: relative; height: 34px; padding: 0 14px 0 30px; border-radius: 11px; border-color: rgba(127,224,255,.45); background: linear-gradient(180deg, rgba(127,224,255,.16), rgba(127,224,255,.06)); color: #e8f8ff; font-weight: 600; touch-action: none; user-select: none; -webkit-user-select: none; transition: background .2s, box-shadow .2s, transform .1s; }
.holdbar .hb-pour i { position: absolute; left: 11px; top: 50%; width: 11px; height: 14px; margin-top: -7px; border: 2px solid #7fe0ff; border-top: 0; border-radius: 0 0 4px 4px; transform: rotate(-25deg); transition: transform .3s; }
.holdbar .hb-pour.on { background: linear-gradient(180deg, rgba(127,224,255,.42), rgba(127,224,255,.18)); box-shadow: 0 0 22px rgba(127,224,255,.35); transform: scale(.97); }
.holdbar .hb-pour.on i { transform: rotate(-70deg); }
@media (pointer: coarse) { .holdbar .hb-pour { height: 42px; padding: 0 18px 0 34px; font-size: 14px; } .holdbar .hb-tilt { width: 200px; } }
.holdbar .hb-tiltbox em { font-style: normal; font-family: var(--mono); width: 36px; color: #fff; }
.holdbar .hb-sp { flex: 1; }
.holdbar .btn.sm { height: 34px; padding: 0 14px; font-size: 13px; touch-action: none; }
.exp.free .legend { bottom: 12px; }
.lbl3d.panlbl { background: rgba(10,13,18,.78); border-color: rgba(127,224,255,.35); font-family: var(--sans); font-size: 12px; }
.lbl3d.panlbl em { font-style: normal; color: #7fe0ff; margin-right: 6px; }
.vgroup { display: flex; flex-direction: column; gap: 4px; padding-top: 8px; margin-top: 4px; border-top: 1px solid var(--line); }
.vgroup.float { position: absolute; right: 420px; bottom: 16px; z-index: 12; flex-direction: row; padding: 6px; border: 1px solid var(--line); border-radius: 14px; background: rgba(12,15,20,.55); backdrop-filter: blur(14px); }
.vbtn { width: 52px; height: 34px; border: 0; border-radius: 10px; background: transparent; color: var(--text2); cursor: pointer; font-size: 16px; touch-action: none; user-select: none; -webkit-user-select: none; }
.vgroup.float .vbtn { width: 38px; }
.vbtn i { font-style: normal; }
.vbtn:hover { background: rgba(255,255,255,.08); color: #fff; }
.vbtn:active { background: color-mix(in srgb, var(--acc) 30%, transparent); }
/* 平板 / 小屏 */
@media (max-width: 900px), (pointer: coarse) {
  .btn.sm { height: 36px; }
  .coach .ch-g { grid-template-columns: repeat(2, minmax(150px, 42vw)); }
  .legend { display: none !important; }
  .topbar .book, .topbar .pill { display: none; }
  .topbar .title { font-size: 16px; }
  .topbar .views { display: none; }
  .dock { top: auto; bottom: 16px; transform: none; padding: 6px; }
  .dock button { width: 46px; height: 46px; }
  .vbtn { width: 46px; height: 40px; }
  .hints { bottom: 120px; width: min(360px, calc(100vw - 100px)); }
  .holdbar { bottom: 16px; left: 16px; right: 80px; transform: none; }
  .holdbar.on { transform: none; }
  .holdbar .hb-info { min-width: 0; flex: 1 1 100%; }
  .challenge, .readcard { top: 64px; }
  .eyehud { right: 80px; bottom: auto; top: 64px; }
  .loupe { width: 160px; height: 160px; right: 80px; bottom: 140px; }
}
.exp.holding .tasks.goals, .exp.holding .drawer, .exp.holding .legend { opacity: 0; pointer-events: none; transition: opacity .2s; }

/* ============ 首页开场 · 第一幕：微观宇宙 ============ */
.home.micro { overflow: hidden; }
.home.micro .home-content { pointer-events: none; }
.home-bg::after { transition: opacity 1.6s ease; }
.home.micro .home-bg::after { opacity: 0; }
.home.micro .scroll-hint { opacity: 0 !important; }
/* 第二幕（实验台）标题节奏：配合从烧瓶拉开的镜头 */
.home.playing .hero .ttl span { animation-delay: calc(1.25s + var(--i) * .08s); }
.home.playing .hero .eyebrow { transition-delay: 1.7s; }
.home.playing .hero .sub { transition-delay: 2.5s; }
.home.playing .hero .subjects { transition-delay: 3.0s; }
.home.playing .hero .stats { transition-delay: 3.5s; }
.home.playing .scroll-hint { transition-delay: 4.2s; }

.mc { position: fixed; inset: 0; z-index: 20; pointer-events: none; opacity: 0; transition: opacity 1.2s ease; }
.mc.on { opacity: 1; }
.mc.out { opacity: 0; transition-duration: .5s; }
.mc-cap { position: absolute; left: 0; right: 0; bottom: 17vh; text-align: center; }
.mc-cap .mc-k, .mc-cap .mc-s { opacity: 0; transform: translateY(14px); filter: blur(10px); transition: opacity .9s cubic-bezier(.2,.8,.2,1), transform .9s cubic-bezier(.2,.8,.2,1), filter .9s, letter-spacing 2.4s cubic-bezier(.2,.8,.2,1); }
.mc-cap .mc-k { font-size: 12px; letter-spacing: .5em; padding-left: .5em; margin-bottom: 16px; font-weight: 600; text-shadow: 0 0 18px currentColor; }
.mc-cap .mc-s { font-family: var(--serif); font-size: clamp(30px, 3.6vw, 54px); font-weight: 600; color: #fff; letter-spacing: .14em; padding-left: .14em; text-shadow: 0 2px 30px rgba(0,0,0,.65), 0 0 60px rgba(120,170,255,.18); }
.mc-cap.on .mc-k, .mc-cap.on .mc-s { opacity: 1; transform: none; filter: none; }
.mc-cap.on .mc-s { letter-spacing: .24em; padding-left: .24em; transition-delay: .12s; }
.mc-cap:not(.on) .mc-k, .mc-cap:not(.on) .mc-s { transform: translateY(-10px); transition-duration: .6s; }
.mc-scale { position: absolute; left: 48px; bottom: 44px; width: 220px; color: #c7d2de; font-family: var(--mono); }
.mc-bar { height: 1px; background: rgba(255,255,255,.14); position: relative; }
.mc-bar i { position: absolute; left: 0; top: -1px; height: 3px; width: 8%; background: linear-gradient(90deg, #5cb8ff, #ffb35c, #5fd69c); box-shadow: 0 0 12px rgba(140,200,255,.6); }
.mc-v { margin-top: 12px; display: flex; align-items: baseline; gap: 12px; }
.mc-v b { font-size: 18px; font-weight: 500; color: #fff; letter-spacing: .04em; }
.mc-v span { font-family: var(--sans); font-size: 11.5px; letter-spacing: .3em; color: #8b97a6; }
.mc-skip { position: absolute; right: 44px; bottom: 38px; pointer-events: auto; display: flex; align-items: center; gap: 10px; padding: 10px 18px; border-radius: 999px; border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.05); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); color: #d7dee6; font-size: 12.5px; letter-spacing: .24em; cursor: pointer; transition: background .25s, border-color .25s; }
.mc-skip span { font-size: 16px; letter-spacing: 0; transition: transform .25s; }
.mc-skip:hover { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.3); }
.mc-skip:hover span { transform: translateX(3px); }
.mc-flash { position: fixed; inset: 0; z-index: 30; pointer-events: none; opacity: 0; background: radial-gradient(circle at 50% 50%, #ffffff 0%, #c9fff4 18%, #2fe0c8 48%, rgba(10,60,70,.95) 100%); transition: opacity .32s cubic-bezier(.6,0,.9,.4); }
.mc-flash.on { opacity: 1; }
.mc-flash.fade { opacity: 0; transition: opacity 1.3s cubic-bezier(.2,.7,.2,1); }
@media (max-width: 700px) {
  .mc-scale { left: 20px; bottom: 28px; width: 150px; }
  .mc-skip { right: 16px; bottom: 22px; padding: 8px 14px; }
  .mc-cap { bottom: 22vh; padding: 0 16px; }
}
/* 进入实验的转场：宇宙收成一点光后闪白 */
.go-flash { position: fixed; inset: 0; z-index: 200; pointer-events: none; opacity: 0; background: radial-gradient(circle at 50% 50%, #ffffff 0%, #d9fff6 22%, #3fd9c4 55%, #06222a 100%); transition: opacity .28s cubic-bezier(.6,0,.9,.4); }
.go-flash.on { opacity: 1; }
.go-flash.on.out { opacity: 0; transition: opacity 1.1s cubic-bezier(.2,.7,.2,1); }
.subj.auto { border-color: color-mix(in srgb, var(--acc) 42%, transparent); box-shadow: 0 0 0 1px color-mix(in srgb, var(--acc) 14%, transparent) inset, 0 12px 40px rgba(0,0,0,.25); }
.subj.auto::before { opacity: .55; }
.subj.auto .ic { box-shadow: 0 0 18px color-mix(in srgb, var(--acc) 45%, transparent); }

/* ============ 实验目录 v2 ============ */
.browser { padding: 120px 7vw 140px; background: linear-gradient(180deg, rgba(4,6,10,0) 0, rgba(4,6,10,.78) 220px, rgba(4,6,10,.9) 100%); }
.browser .br-eyebrow { font-size: 12px; letter-spacing: .42em; color: #8fb6ff; margin-bottom: 18px; display: flex; align-items: center; gap: 14px; }
.browser .br-eyebrow::before { content: ""; width: 42px; height: 1px; background: linear-gradient(90deg, transparent, #8fb6ff); }
.browser h2 { font-size: clamp(34px, 4.2vw, 58px); line-height: 1.12; margin: 0 0 14px; letter-spacing: .02em; }
.browser h2 em { font-style: normal; background: linear-gradient(90deg, #7fc4ff, #ffd59a 55%, #7fe6b0); -webkit-background-clip: text; background-clip: text; color: transparent; }
.browser .lead { font-size: 15px; color: #9aa6b4; max-width: 680px; line-height: 1.8; margin-bottom: 36px; }
.filters { background: rgba(6,9,14,.72); border: 1px solid rgba(255,255,255,.07); border-radius: 18px; padding: 14px 18px; top: 12px; box-shadow: 0 18px 50px rgba(0,0,0,.35); backdrop-filter: blur(20px) saturate(1.4); -webkit-backdrop-filter: blur(20px) saturate(1.4); }
.grid { gap: 16px; perspective: 1200px; }
.group-title { margin: 34px 0 6px; padding-bottom: 10px; border-bottom: 1px solid rgba(255,255,255,.06); }
.group-title h3 { font-size: 22px; display: flex; align-items: center; gap: 10px; }
.group-title h3::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--acc); box-shadow: 0 0 14px var(--acc); }
.card { --rx: 0deg; --ry: 0deg; --mx: 50%; --my: 0%; border-radius: 18px; padding: 20px 20px 16px; min-height: 148px; background: linear-gradient(160deg, rgba(255,255,255,.06), rgba(255,255,255,.015) 60%); border: 1px solid rgba(255,255,255,.07); transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)); transform-style: preserve-3d; transition: transform .35s cubic-bezier(.2,.8,.2,1), border-color .3s, box-shadow .3s, background .3s; animation: cardin .7s cubic-bezier(.2,.8,.2,1) both; }
.card::after { width: 100%; height: 100%; inset: 0; right: auto; top: auto; background: radial-gradient(260px circle at var(--mx) var(--my), color-mix(in srgb, var(--acc) 22%, transparent), transparent 60%); }
.card:hover { transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)) translateY(-4px); border-color: color-mix(in srgb, var(--acc) 45%, transparent); box-shadow: 0 22px 50px rgba(0,0,0,.45), 0 0 0 1px color-mix(in srgb, var(--acc) 18%, transparent) inset, 0 0 40px color-mix(in srgb, var(--acc) 14%, transparent); }
.card .wm { position: absolute; right: -14px; bottom: -18px; width: 96px; height: 96px; opacity: .06; pointer-events: none; transition: opacity .3s, transform .5s cubic-bezier(.2,.8,.2,1); }
.card .wm svg { width: 100%; height: 100%; fill: none; stroke: var(--acc); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.card:hover .wm { opacity: .2; transform: rotate(-8deg) scale(1.08); }
.card .t { font-size: 16px; letter-spacing: .01em; }
.card .go { transition: transform .25s; }
.card:hover .go { transform: translateX(4px); }
.card.off, .card.plan { animation-name: cardin2; }
@keyframes cardin2 { from { opacity: 0; transform: translateY(14px); } }
/* 自由操作：流光描边 */
@property --ang { syntax: '<angle>'; initial-value: 0deg; inherits: false; }
.card.free { border-color: transparent; background: linear-gradient(160deg, rgba(40,30,18,.92), rgba(14,14,16,.95)) padding-box, conic-gradient(from var(--ang), rgba(255,200,140,.15), #ffcf8a, rgba(127,224,255,.7), rgba(255,200,140,.15) 60%) border-box; animation: cardin .7s cubic-bezier(.2,.8,.2,1) both, spin-ang 6s linear infinite; }
@keyframes spin-ang { to { --ang: 360deg; } }
.card.free .t { color: #fff3e2; }
@media (max-width: 700px) { .browser { padding: 80px 16px 100px; } .filters { padding: 12px; } }

/* 自由模式：左上角读数卡片 */
.hud { position: absolute; left: 16px; top: 74px; z-index: 9; width: 264px; max-height: calc(100vh - 220px); overflow-y: auto; display: none; flex-direction: column; gap: 8px; padding: 10px; border-radius: 16px; background: rgba(12,15,20,.55); border: 1px solid var(--line); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); scrollbar-width: none; }
.hud.on { display: flex; }
.hud .readouts { margin: 0; gap: 6px; }
.hud .readout { padding: 6px 9px; }
.hud .row { margin: 0; gap: 6px; flex-wrap: wrap; }
.hud .row .btn { height: 30px; font-size: 12.5px; flex: 1; }
.hud .note { margin: 0; font-size: 12px; }
.hud .svgbox { margin: 0; cursor: zoom-in; }
.hud .svgbox.big { position: fixed; left: 50%; top: 50%; transform: translate(-50%, -50%); width: min(560px, 90vw); z-index: 60; background: rgba(12,15,20,.92); border: 1px solid var(--line2); border-radius: 16px; padding: 14px; cursor: zoom-out; }
@media (max-width: 700px) { .hud { width: 200px; top: 64px; left: 10px; } .hud .svgbox:not(.big) { display: none; } }
.hud > .k { font-size: 11.5px; color: var(--muted); margin-bottom: -4px; }
.hud .search { flex: 1; min-width: 0; height: 30px; }
.exp.free .legend { left: 16px; transform: none; max-width: calc(100vw - 560px); overflow: hidden; }
@media (max-width: 900px) { .exp.free .legend { display: none; } }
.eyepiece .kstrip { position: absolute; top: 50%; transform: translateY(-50%); width: 56px; height: 240px; border-radius: 28px; pointer-events: auto; cursor: ns-resize; touch-action: none; background: repeating-linear-gradient(180deg, #2a2e35 0 6px, #15181d 6px 12px); background-position: 0 var(--o, 0px); border: 1px solid rgba(255,255,255,.18); box-shadow: inset 0 0 18px rgba(0,0,0,.8), 0 8px 24px rgba(0,0,0,.5); }
.eyepiece .kstrip.on { border-color: rgba(127,224,255,.6); }
.eyepiece .kstrip span { position: absolute; left: 50%; bottom: -26px; transform: translateX(-50%); white-space: nowrap; font-size: 12px; color: #cfd6df; }
.eyepiece .ep-tip { position: absolute; left: 50%; top: -36px; transform: translateX(-50%); white-space: nowrap; font-size: 12px; color: #9aa6b4; }
.lbl3d.mvl { background: rgba(10,13,18,.74); border-color: rgba(127,224,255,.42); font-family: var(--sans); font-size: 12px; padding: 2px 8px; color: #e8f6ff; pointer-events: none; }