:root {
  --bg: #0a0c14;
  --surface: #111520;
  --surface2: #161b2e;
  --coral: #ff5c61;
  --cyan: #00d4aa;
  --amber: #ffb74d;
  --white: #f0f4ff;
  --muted: #b3bfd4;
  --faint: #91a0bb;
  --line: rgba(255,255,255,.12);
  --font-zh: "Noto Sans SC","PingFang SC","Microsoft YaHei","Source Han Sans CN",sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; height: 100%; overflow: hidden; background: var(--bg); color: var(--white); font-family: var(--font-zh); }
body { -webkit-font-smoothing: antialiased; }
#deck { position: fixed; inset: 0; display: flex; width: 1500vw; height: 100vh; transition: transform .55s cubic-bezier(.22,.68,0,1.1); }
.slide { position: relative; width: 100vw; height: 100vh; flex: 0 0 100vw; overflow: hidden; padding: 5.6vh 5vw 6vh; background: var(--bg); flex-direction: column; }
.slide::before { content: ""; position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(255,255,255,.026) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.026) 1px,transparent 1px); background-size: 4% 4%; }
.slide::after { content: ""; position: absolute; width: 44vw; height: 44vw; right: -16vw; top: -20vw; border-radius: 50%; filter: blur(100px); opacity: .12; background: var(--accent,var(--cyan)); pointer-events: none; }
.slide.coral { --accent: var(--coral); }
.slide.cyan { --accent: var(--cyan); }
.slide.amber { --accent: var(--amber); }
.chrome { position: relative; z-index: 3; display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 36px; color: var(--accent,var(--cyan)); font: 700 22px/1.8 var(--font-mono); letter-spacing: .08em; }
.chrome .section-name { font-family: var(--font-zh); font-weight: 600; letter-spacing: .04em; }
.page-no { white-space: nowrap; }
.head { position: relative; z-index: 3; margin-top: 3.4vh; display: flex; align-items: flex-end; justify-content: space-between; gap: 36px; }
.head h1, .head h2 { font-size: clamp(52px,3.55vw,70px); font-weight: 850; line-height: 1.22; letter-spacing: -.035em; max-width: none; }
.head-note { max-width: 26ch; font-size: 28px; line-height: 1.8; color: var(--muted); padding-bottom: 4px; }
.kicker { margin-bottom: 1.2vh; color: var(--accent,var(--cyan)); font: 700 24px/1.8 var(--font-mono); letter-spacing: .12em; }
.body-copy { font-size: 32px; line-height: 1.85; color: var(--muted); }
.big-claim { font-size: clamp(40px,2.8vw,56px); line-height: 1.4; font-weight: 800; letter-spacing: -.025em; }
.label { display: inline-flex; align-items: center; width: fit-content; padding: 5px 16px; border-radius: 100px; font: 700 24px/1.8 var(--font-zh); color: var(--accent,var(--cyan)); border: 1px solid currentColor; background: color-mix(in srgb,currentColor 10%,transparent); }
.small-label { font-size: 26px; line-height: 1.8; font-weight: 650; color: var(--accent,var(--cyan)); }
.note { font-size: 28px; line-height: 1.85; color: var(--muted); }
.note strong { color: var(--accent,var(--amber)); font-weight: 700; }
.bottom-note { position: absolute; left: 5vw; right: 5vw; bottom: 10vh; z-index: 3; padding: 16px 24px; border-left: 4px solid var(--accent,var(--amber)); background: color-mix(in srgb,var(--accent,var(--amber)) 9%,transparent); font-size: 30px; line-height: 1.8; color: var(--white); }
.ppt-editable { transform: translate(var(--move-x,0px),var(--move-y,0px)); }
.panel { background: rgba(17,21,32,.92); border: 1px solid var(--line); border-radius: 16px; padding: 28px; }
.rule { height: 1px; background: var(--line); }
.nav-bar { position: fixed; bottom: 2vh; right: 2vw; z-index: 60; display: flex; align-items: center; gap: 16px; padding: 8px 16px; border: 1px solid var(--line); border-radius: 100px; background: rgba(10,12,20,.9); font: 20px/1.8 var(--font-mono); color: var(--muted); }
.nav-bar button { background: none; border: 0; color: inherit; font: inherit; cursor: pointer; }
.nav-info { min-width: 86px; text-align: center; }
#hint { position: fixed; left: 2vw; bottom: 2vh; z-index: 60; color: var(--faint); font: 18px/1.8 var(--font-mono); }
#ppt-edit-toolbar { display: none; position: fixed; left: 50%; bottom: 2vh; transform: translateX(-50%); z-index: 100; align-items: center; gap: 4px; padding: 8px; border-radius: 10px; background: var(--white); color: var(--bg); white-space: nowrap; font: 15px var(--font-zh); }
body.edit-mode #ppt-edit-toolbar { display: flex; }
#ppt-edit-toolbar button { padding: 6px 9px; border: 1px solid #aaa; background: #fff; color: #111; cursor: pointer; }
#ppt-edit-status { padding: 0 8px; }
body.edit-mode .ppt-editable { outline: 2px dashed color-mix(in srgb,var(--cyan) 60%,transparent); cursor: text; }
.ppt-selected { outline: 3px solid var(--amber)!important; }
body.move-mode .ppt-editable { cursor: move; }
body.edit-mode #hint, body.edit-mode .nav-bar { display: none; }

/* 01 · 封面 */
.cover { padding: 0; }
.cover-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; background:var(--bg); }
.cover-mask { position: absolute; inset: 0; background: linear-gradient(90deg,#0a0c14 0%,rgba(10,12,20,.98) 31%,rgba(10,12,20,.30) 62%,rgba(10,12,20,.04) 100%); }
.cover-top { position: absolute; z-index: 3; left: 5vw; right: 5vw; top: 5.6vh; display: flex; justify-content: space-between; align-items: center; }
.cover-content { position: absolute; z-index: 3; left: 5vw; top: 23vh; width: 51vw; }
.cover h1 { margin: 2.2vh 0; font-size: clamp(82px,5.2vw,108px); font-weight: 900; line-height: 1.24; letter-spacing: -.045em; }
.cover h1 span { color: var(--amber); }
.cover-sub { font-size: 32px; line-height: 1.85; color: var(--muted); }
.cover-foot { position: absolute; z-index: 3; left: 5vw; bottom: 8vh; display: flex; gap: 16px; }

/* 02 · 双轨答案 */
.question-bar { position: relative; z-index: 3; margin-top: 4vh; padding: 20px 30px; border: 1px solid rgba(255,183,77,.35); border-radius: 14px; background: rgba(255,183,77,.08); font-size: 34px; line-height: 1.65; font-weight: 700; }
.answer-tracks { position: relative; z-index: 3; display: grid; grid-template-columns: 1fr 1fr; gap: 36px; margin-top: 3vh; }
.answer-track { padding: 24px 30px; border-top: 3px solid var(--coral); background: rgba(255,92,97,.05); }
.answer-track.better { border-color: var(--cyan); background: rgba(0,212,170,.07); }
.answer-track h3 { font-size: 36px; line-height: 1.4; margin-bottom: 12px; }
.answer-track p { font-size: 32px; line-height: 1.8; color: var(--muted); }
.answer-track .answer { margin-top: 18px; font-size: 40px; line-height: 1.8; color: var(--white); font-weight: 700; }

/* 03 · 文件在，判断丢了 */
.loss-stage { position: relative; z-index: 3; height: 60vh; margin-top: 2vh; width: 100%; flex: 0 0 60vh; }
.loss-center { position: absolute; left: 23%; top: 18%; width: 54%; text-align: center; }
.loss-center .big-claim { font-size: 58px; }
.loss-center .big-claim span { color: var(--coral); }
.loss-center p { margin-top: 22px; font-size: 30px; line-height: 1.8; color: var(--muted); }
.fragment { position: absolute; padding: 18px 26px; border: 1px solid rgba(255,92,97,.4); border-radius: 12px; background: var(--surface2); color: var(--white); font-size: 32px; line-height: 1.8; }
.fragment::after { content: ""; position: absolute; width: 90px; height: 1px; background: linear-gradient(90deg,var(--coral),transparent); top: 50%; pointer-events:none; }
.fragment.f1 { left: 3%; top: 8%; } .fragment.f2 { right: 4%; top: 6%; }
.fragment.f3 { left: 0; top: 50%; } .fragment.f4 { right: 0; top: 57%; }
.fragment.f5 { right: 9%; bottom: 0; }
.fragment.f1::after,.fragment.f3::after,.fragment.f5::after { left: 100%; }
.fragment.f2::after,.fragment.f4::after { right: 100%; }

/* 04 · 三轨汇流 */
.lanes { position: relative; z-index: 3; margin-top: 5vh; display: grid; gap: 22px; }
.lane { display: grid; grid-template-columns: 1.2fr 2.5fr 1.2fr; align-items: center; gap: 26px; min-height: 15vh; padding: 20px 30px; border: 1px solid var(--line); border-radius: 16px; background: rgba(17,21,32,.85); }
.lane.primary { border: 2px solid var(--cyan); background: rgba(0,212,170,.09); box-shadow: 0 0 44px rgba(0,212,170,.09); }
.lane h3 { font-size: 38px; line-height: 1.3; }
.lane p { font-size: 30px; line-height: 1.8; color: var(--muted); }
.lane .lane-role { text-align: right; font-size: 32px; line-height: 1.5; font-weight: 700; color: var(--accent,var(--cyan)); }

/* 05 · 检索与积累 */
.compare-time { position: relative; z-index: 3; display: grid; grid-template-columns: 1fr 1fr; gap: 44px; margin-top: 4vh; }
.time-side { position: relative; min-height: 51vh; padding: 28px 32px; border-radius: 18px; border: 1px solid var(--line); background: rgba(17,21,32,.86); }
.time-side.accumulate { border-color: rgba(0,212,170,.4); background: rgba(0,212,170,.06); }
.time-side h3 { font-size: 40px; line-height: 1.35; margin-bottom: 24px; }
.repeat-row { position: relative; display: flex; align-items: center; gap: 18px; margin: 20px 0; font-size: 32px; line-height: 1.8; color: var(--muted); }
.repeat-row::after { content: "↻"; margin-left: auto; color: var(--coral); font-size: 44px; }
.repeat-row .mini-file { flex: 0 0 56px; height: 68px; border: 2px solid var(--coral); border-radius: 7px; }
.wiki-steps { display: grid; gap: 20px; }
.wiki-step { padding: 18px 24px; border-left: 4px solid var(--cyan); background: rgba(0,212,170,.08); font-size: 32px; line-height: 1.8; }
.wiki-step:nth-child(2) { margin-left: 24px; }
.wiki-step:nth-child(3) { margin-left: 48px; background: rgba(0,212,170,.15); }
.wiki-step strong { color: var(--cyan); }

/* 06 · 三层结构 */
.layers-layout { position: relative; z-index: 3; display: grid; grid-template-columns: 2.25fr 1fr; gap: 42px; margin-top: 4vh; }
.layers { display: flex; flex-direction: column-reverse; gap: 18px; }
.layer { display: grid; grid-template-columns: .85fr 1.7fr 1fr; align-items: center; gap: 24px; min-height: 14vh; padding: 20px 28px; border-radius: 14px; background: var(--surface); border-left: 5px solid var(--coral); }
.layer.wiki { border-color: var(--cyan); background: rgba(0,212,170,.08); }
.layer.schema { border-color: var(--amber); background: rgba(255,183,77,.07); }
.layer h3 { font-size: 36px; line-height: 1.35; }
.layer p { font-size: 29px; line-height: 1.8; color: var(--muted); }
.layer .permission { font-size: 30px; line-height: 1.6; font-weight: 700; color: var(--accent,var(--cyan)); }
.metaphor { display: flex; flex-direction: column; justify-content: center; padding: 28px; border: 1px solid var(--line); border-radius: 16px; }
.metaphor .big-claim { font-size: 42px; }
.metaphor p { margin-top: 24px; font-size: 30px; line-height: 1.9; color: var(--muted); }

/* 07 · 维护闭环 */
.loop-layout { position: relative; z-index: 3; display: grid; grid-template-columns: 1.45fr 1fr; gap: 46px; margin-top: 3vh; align-items: center; }
.loop-triangle { position: relative; height: 57vh; }
.loop-node { position: absolute; width: 43%; padding: 22px 26px; border-radius: 16px; background: var(--surface); border: 2px solid var(--cyan); }
.loop-node h3 { font-size: 38px; line-height: 1.3; color: var(--cyan); }
.loop-node p { font-size: 29px; line-height: 1.85; color: var(--muted); }
.loop-node.ingest { left: 0; top: 0; }
.loop-node.query { right: 0; top: 0; }
.loop-node.lint { left: 28.5%; bottom: 0; border-color: var(--amber); }
.loop-node.lint h3 { color: var(--amber); }
.loop-arrow { position: absolute; color: var(--cyan); font-size: 76px; line-height: 1; text-shadow: 0 0 20px rgba(0,212,170,.45); }
.loop-arrow.a1 { left: 47%; top: 16%; }
.loop-arrow.a2 { right: 20%; top: 51%; transform: rotate(120deg); }
.loop-arrow.a3 { left: 20%; top: 51%; transform: rotate(240deg); }
.index-log { display: grid; gap: 24px; }
.index-log article { padding: 26px 30px; border: 1px solid var(--line); border-radius: 16px; background: rgba(17,21,32,.9); }
.index-log h3 { font: 700 38px/1.4 var(--font-mono); color: var(--amber); }
.index-log p { font-size: 30px; line-height: 1.85; color: var(--muted); }

/* 08 · 人审闸门 */
.handoff { position: relative; z-index: 3; display: grid; grid-template-columns: 1fr .55fr 1fr; align-items: stretch; gap: 28px; margin-top: 6vh; }
.role-box { padding: 32px; border-radius: 18px; background: rgba(0,212,170,.07); border: 1px solid rgba(0,212,170,.35); }
.role-box.human { background: rgba(255,183,77,.07); border-color: rgba(255,183,77,.4); }
.role-box h3 { font-size: 44px; line-height: 1.35; margin-bottom: 24px; }
.role-box p { font-size: 32px; line-height: 1.9; color: var(--muted); }
.approval-gate { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.approval-gate .gate-icon { display: grid; place-items: center; width: 128px; height: 128px; border: 4px solid var(--amber); border-radius: 50%; color: var(--amber); font-size: 58px; }
.approval-gate strong { margin-top: 20px; font-size: 34px; line-height: 1.5; color: var(--amber); }
.approval-gate span { margin-top: 12px; font-size: 28px; line-height: 1.8; color: var(--muted); }

/* 09 · 五类目录 */
.cabinet { position: relative; z-index: 3; margin-top: 4vh; display: grid; grid-template-columns: 1fr 1.8fr; gap: 40px; }
.cabinet-entry { display: flex; flex-direction: column; justify-content: center; padding: 32px; border: 2px solid var(--amber); border-radius: 16px; background: rgba(255,183,77,.08); }
.cabinet-entry h3 { font-size: 44px; line-height: 1.35; color: var(--amber); }
.cabinet-entry p { margin-top: 22px; font-size: 30px; line-height: 1.85; color: var(--muted); }
.category-list { display: grid; gap: 14px; }
.category { display: grid; grid-template-columns: 1fr 1.4fr; align-items: center; gap: 24px; padding: 20px 24px; border-radius: 12px; background: var(--surface); border-left: 4px solid var(--cyan); }
.category h3 { font-size: 32px; line-height: 1.4; }
.category p { font-size: 28px; line-height: 1.8; color: var(--muted); }

/* 10 · 终端与目录 */
.build-layout { position: relative; z-index: 3; display: grid; grid-template-columns: 1.3fr 1fr; gap: 34px; margin-top: 3vh; }
.terminal { overflow: hidden; border: 1px solid rgba(0,212,170,.35); border-radius: 16px; background: #080c11; }
.terminal-bar { padding: 12px 24px; border-bottom: 1px solid var(--line); color: var(--cyan); font: 24px/1.8 var(--font-mono); }
.terminal-body { padding: 26px 28px; font: 34px/1.85 var(--font-zh); color: var(--white); }
.terminal-body .cmd { color: var(--cyan); }
.terminal-body .safe { color: var(--amber); }
.tree { padding: 24px 28px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); font: 28px/1.75 var(--font-mono); color: var(--muted); }
.tree strong { color: var(--amber); font-weight: 700; }
.tree .folder { color: var(--cyan); }

/* 11 · 单份资料扇出 */
.ingest-layout { position: relative; z-index: 3; display: grid; grid-template-columns: .85fr .38fr 1.4fr; align-items: center; gap: 30px; margin-top: 4vh; }
.source-doc { display: flex; flex-direction: column; justify-content: center; min-height: 36vh; padding: 30px; border: 2px solid var(--coral); border-radius: 12px; background: rgba(255,92,97,.06); }
.source-doc h3 { font-size: 40px; line-height: 1.4; }
.source-doc p { margin-top: 22px; font-size: 30px; line-height: 1.85; color: var(--muted); }
.ingest-arrow { text-align: center; color: var(--cyan); font-size: 64px; }
.ingest-arrow small { display: block; margin-top: 16px; font-size: 28px; line-height: 1.6; }
.ingest-results { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; position: relative; }
.ingest-result { min-height: 19vh; padding: 24px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.ingest-result h3 { font-size: 34px; line-height: 1.4; color: var(--cyan); }
.ingest-result p { margin-top: 10px; font-size: 28px; line-height: 1.8; color: var(--muted); }

/* 12 · 新选题 */
.idea-layout { position: relative; z-index: 3; display: grid; grid-template-columns: .9fr 1.3fr; gap: 42px; margin-top: 4vh; }
.old-inputs { display: grid; gap: 20px; align-content: center; }
.old-input { padding: 24px 28px; border-radius: 14px; border-left: 4px solid var(--coral); background: rgba(255,92,97,.07); font-size: 32px; line-height: 1.75; }
.idea-output { padding: 28px 32px; border: 2px solid var(--amber); border-radius: 16px; background: rgba(255,183,77,.07); }
.idea-output h3 { font-size: 38px; line-height: 1.45; color: var(--amber); }
.idea-line { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); font-size: 29px; line-height: 1.8; color: var(--muted); }
.idea-line strong { color: var(--white); }

/* 13 · 数据流 */
.dataflow { position: relative; z-index: 3; margin-top: 4vh; }
.data-origin { display: inline-block; padding: 22px 30px; border: 2px solid var(--cyan); border-radius: 14px; font-size: 36px; line-height: 1.5; color: var(--cyan); }
.flow-line { position: relative; margin: 22px 0 20px 54px; width: calc(100% - 108px); height: 2px; background: linear-gradient(90deg,var(--cyan),var(--coral)); }
.flow-line::after { content: "数据可能被带走 →"; position: absolute; right: 0; bottom: 12px; color: var(--coral); font-size: 30px; line-height: 1.8; font-weight: 700; }
.skill-flow { background: linear-gradient(90deg,var(--cyan),var(--amber)); }
.skill-flow::after { content: "下次直接照做 →"; color: var(--amber); }
.exit-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.exit-node { min-height: 17vh; padding: 22px; border: 1px solid rgba(255,92,97,.4); border-radius: 14px; background: rgba(255,92,97,.06); }
.exit-node h3 { font-size: 32px; line-height: 1.4; color: var(--coral); }
.exit-node p { margin-top: 10px; font-size: 28px; line-height: 1.85; color: var(--muted); }
.safety-actions { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; margin-top: 24px; }
.safety-action { padding: 18px 24px; border-left: 4px solid var(--amber); background: rgba(255,183,77,.07); font-size: 29px; line-height: 1.75; }

/* 14 · 三道闸门 */
.write-flow { position: relative; z-index: 3; display: grid; grid-template-columns: 1.1fr repeat(3,.8fr) 1.1fr; align-items: center; gap: 18px; margin-top: 5vh; }
.write-node { min-height: 23vh; display: flex; flex-direction: column; justify-content: center; padding: 22px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); text-align: center; }
.write-node h3 { font-size: 32px; line-height: 1.45; }
.write-node p { margin-top: 12px; font-size: 28px; line-height: 1.85; color: var(--muted); }
.write-node.gate { border: 2px solid var(--amber); background: rgba(255,183,77,.08); }
.write-node.raw { border-color: var(--coral); }
.write-arrow { color: var(--amber); font-size: 34px; text-align: center; }
.recovery { position: relative; z-index: 3; display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 30px; }
.recovery article { padding: 20px 28px; border-radius: 14px; background: rgba(0,212,170,.07); border: 1px solid rgba(0,212,170,.3); }
.recovery h3 { font-size: 32px; line-height: 1.4; color: var(--cyan); }
.recovery p { margin-top: 8px; font-size: 28px; line-height: 1.8; color: var(--muted); }

/* 15 · V1 */
.final-layout { position: relative; z-index: 3; display: grid; grid-template-columns: 1.35fr .8fr; align-items: center; gap: 50px; margin-top: 4vh; }
.checklist { display: grid; gap: 16px; list-style: none; }
.checklist li { display: flex; align-items: center; gap: 20px; padding: 16px 24px; border-bottom: 1px solid var(--line); font-size: 32px; line-height: 1.85; }
.checklist li::before { content: "✓"; color: var(--cyan); font-weight: 900; }
.v1 { text-align: center; }
.v1 strong { display: block; font: 900 clamp(120px,12vw,230px)/1 var(--font-mono); color: var(--amber); letter-spacing: -.08em; }
.v1 span { display: block; margin-top: 22px; font-size: 32px; line-height: 1.8; color: var(--muted); }

@media (prefers-reduced-motion: reduce) { #deck { transition: none; } }

/* 竖屏：固定 16:9 舞台整页等比缩放，不重排、不裁切 */
#viewport { position: fixed; inset: 0; overflow: hidden; }
body.portrait #viewport { display: block; }
body.portrait #deck { position: relative; inset: auto; flex: 0 0 auto; }
body.portrait .nav-bar, body.portrait #hint { display: none; }