/* ============================================================
   《电脑的另一层》新生分享 · 设计系统
   克制、纸感、技术氛围；终端组件忠实还原 SecLab 真实配色。
   ============================================================ */

:root {
  --paper: #f5f4f0;
  --paper-raise: #fdfcfa;
  --ink: #1c1f24;
  --ink-soft: #3d434b;
  --muted: #7a8087;
  --line: rgba(28, 31, 36, 0.12);
  --accent: #0e7569;
  --accent-deep: #0a5a50;
  --accent-soft: rgba(14, 117, 105, 0.09);
  --amber: #b4590a;
  --term-bg: #12171e;
  --term-bg-raise: #1a212b;
  --term-ink: #e8e4db;
  --term-dim: #8f9aa5;
  --term-green: #4ade80;
  --term-cyan: #22d3ee;
  --term-amber: #f5c26b;
}

/* ---------- 字体 ---------- */
@font-face {
  font-family: 'JetBrains Mono';
  src: url('assets/fonts/jetbrains-mono-latin-wght-normal.woff2') format('woff2');
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

/* ---------- Reveal 基础 ---------- */
.reveal {
  font-family:
    'Noto Sans SC Variable', -apple-system, BlinkMacSystemFont, 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', 'Source Han Sans SC',
    sans-serif;
  font-size: 36px;
  font-weight: 400;
  color: var(--ink);
}

.reveal-viewport {
  background:
    radial-gradient(1200px 700px at 85% -10%, rgba(14, 117, 105, 0.06), transparent 60%),
    var(--paper);
}

.reveal .slides section {
  text-align: left;
  padding: 0 38px;
  box-sizing: border-box;
}

.reveal h1,
.reveal h2,
.reveal h3 {
  font-family: inherit;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-transform: none;
}

.reveal h1 { font-size: 2.2em; line-height: 1.25; }
.reveal h2 { font-size: 1.55em; line-height: 1.3; }

.reveal p { line-height: 1.55; margin: 0.55em 0; }
.reveal strong { font-weight: 700; }

/* 页眉式小标签 */
.kicker {
  display: inline-block;
  font-size: 0.58em;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 0.28em 1.1em;
  margin-bottom: 1em;
}

/* 主标题下的细线 */
.rule {
  width: 64px;
  height: 3px;
  border-radius: 2px;
  background: var(--accent);
  margin: 0.9em 0 1.1em;
}

/* ---------- 居中大问句页 ---------- */
.q-slide {
  display: flex !important;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  height: 100%;
  text-align: left;
}
.q-slide .big-q {
  font-size: 1.9em;
  font-weight: 700;
  line-height: 1.45;
  max-width: 22em;
}
.q-slide .big-a {
  font-size: 1.15em;
  color: var(--accent-deep);
  font-weight: 600;
  margin-top: 1.2em;
}
.q-slide .sub {
  font-size: 0.82em;
  color: var(--muted);
  margin-top: 1.6em;
  max-width: 34em;
}

/* 超大正文句 */
.statement {
  font-size: 1.35em;
  font-weight: 650;
  line-height: 1.55;
  max-width: 26em;
}
.statement .em { color: var(--accent-deep); }

/* ---------- 终端组件 ---------- */
.term {
  background: var(--term-bg);
  border-radius: 14px;
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 24px 60px -24px rgba(18, 23, 30, 0.55);
  margin: 0.7em 0;
  max-width: 100%;
}
.term.small { font-size: 0.86em; }
.term-title {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--term-bg-raise);
  padding: 10px 16px;
  font-family: 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif;
  font-size: 0.42em;
  color: var(--term-dim);
  letter-spacing: 0.04em;
}
.term-title .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  flex: none;
}
.term-title .dot.r { background: #e0705f; }
.term-title .dot.y { background: #e5b55a; }
.term-title .dot.g { background: #63b36b; }
.term-title .t { margin-left: 8px; }
.term-body {
  padding: 0.75em 1.1em 1em;
  font-family: 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif;
  font-size: 0.72em;
  line-height: 1.75;
  color: var(--term-ink);
}
.term-body p { margin: 0; line-height: 1.75; }

.t-cmd { white-space: pre-wrap; word-break: break-all; }
.t-prompt .u { color: var(--term-green); font-weight: 600; }
.t-prompt .p { color: var(--term-cyan); }
.t-prompt .s { color: #fff; }

.t-out {
  color: var(--term-dim);
  white-space: pre-wrap;
  word-break: break-all;
}
/* JS 启用 + 自动播放时，输出初始隐藏（无 JS / 打印时直接全部可见） */
html.js:not(.print-pdf) .term[data-autoplay] .t-out {
  opacity: 0;
  transform: translateY(5px);
}
html.js:not(.print-pdf) .term[data-autoplay] .t-out.shown {
  opacity: 1;
  transform: none;
  transition: opacity 0.28s ease, transform 0.28s ease;
}
.print-pdf .term[data-autoplay] .t-out { opacity: 1 !important; }

/* 重点行 */
.t-hl {
  color: var(--term-amber);
  font-weight: 600;
}
.t-hl.shown { text-shadow: 0 0 18px rgba(245, 194, 107, 0.35); }
.t-ok { color: var(--term-green); font-weight: 600; }

/* 光标 */
.t-cursor {
  display: inline-block;
  width: 0.58em;
  height: 1.05em;
  margin-left: 2px;
  vertical-align: text-bottom;
  background: var(--term-ink);
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* 终端下方的反应字幕 */
.react {
  font-size: 1.05em;
  font-weight: 650;
  color: var(--ink-soft);
  margin-top: 0.8em;
}
.react .em { color: var(--accent-deep); }
.react-q {
  font-size: 1.5em;
  font-weight: 700;
  margin-top: 0.6em;
}

/* ---------- 卡片与流程 ---------- */
.cards { display: flex; flex-direction: column; gap: 0.55em; margin-top: 0.8em; }
.qa-card {
  display: flex;
  align-items: baseline;
  gap: 0.9em;
  background: var(--paper-raise);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.55em 1em;
}
.qa-card .ask {
  font-family: 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif;
  font-size: 0.85em;
  font-weight: 600;
  color: var(--accent-deep);
  min-width: 4.2em;
}
.qa-card .ask small {
  display: block;
  font-family: inherit;
  font-size: 0.62em;
  font-weight: 400;
  color: var(--muted);
}
.qa-card .arr { color: var(--muted); font-size: 0.8em; }
.qa-card .ans {
  font-family: 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif;
  font-size: 0.85em;
  font-weight: 600;
  color: var(--ink);
}

/* 简单流程图 */
.flow {
  display: flex;
  align-items: center;
  gap: 0.7em;
  margin: 1em 0;
  font-size: 0.85em;
}
.flow .node {
  border: 1.5px solid var(--accent);
  background: var(--accent-soft);
  color: var(--accent-deep);
  border-radius: 14px;
  padding: 0.5em 1.1em;
  font-weight: 650;
  white-space: nowrap;
}
.flow .node.plain {
  border-color: var(--line);
  background: var(--paper-raise);
  color: var(--ink);
}
.flow .edge { display: flex; flex-direction: column; align-items: center; color: var(--muted); font-size: 0.62em; line-height: 1.3; }
.flow .edge .arrow { font-size: 1.6em; color: var(--accent); line-height: 1; }

/* 方向映射表 */
.map-rows { margin-top: 0.9em; display: flex; flex-direction: column; gap: 0.42em; }
.map-row {
  display: flex;
  align-items: baseline;
  gap: 0.8em;
  font-size: 0.88em;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.42em;
}
.map-row .from { color: var(--muted); min-width: 11em; }
.map-row .to { font-weight: 650; color: var(--ink); }
.map-row .to .tag { color: var(--accent-deep); }

/* ---------- 步骤清单 ---------- */
.steps { list-style: none; margin: 0.8em 0 0; padding: 0; }
.steps li {
  display: flex;
  align-items: baseline;
  gap: 0.7em;
  font-size: 0.98em;
  font-weight: 600;
  padding: 0.42em 0;
}
.steps .no {
  flex: none;
  width: 1.55em;
  height: 1.55em;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.62em;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transform: translateY(0.28em);
}
.steps li small { display: block; font-weight: 400; color: var(--muted); font-size: 0.72em; margin-top: 0.3em; }

/* ---------- QR 与链接 ---------- */
.qr-row { display: flex; align-items: center; gap: 1.6em; margin-top: 0.6em; }
.qr-card {
  flex: none;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  box-shadow: 0 16px 40px -22px rgba(18, 23, 30, 0.35);
}
.qr-card .qr svg { display: block; width: 210px; height: auto; }
.qr-card.small .qr svg { width: 150px; }
.url-line {
  font-family: 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif;
  font-size: 0.95em;
  font-weight: 650;
  color: var(--accent-deep);
  word-break: break-all;
}
.url-note { font-size: 0.62em; color: var(--muted); margin-top: 0.9em; }

/* ---------- 聊天区提示 chip ---------- */
.chat-chip {
  position: absolute;
  right: 28px;
  bottom: 26px;
  font-size: 0.5em;
  color: var(--accent-deep);
  border: 1px dashed var(--accent);
  border-radius: 999px;
  padding: 0.45em 1.2em;
  background: rgba(245, 244, 240, 0.85);
}

/* ---------- 大段乱码展示 ---------- */
.gibberish {
  font-family: 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif;
  font-size: 0.78em;
  line-height: 1.8;
  color: var(--ink-soft);
  background: var(--paper-raise);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1em 1.2em;
  word-break: break-all;
  max-width: 34em;
}

/* ---------- 结束页 ---------- */
.end-line {
  font-size: 1.7em;
  font-weight: 700;
  line-height: 1.5;
  max-width: 20em;
}
.end-line .em { color: var(--accent-deep); }

/* ---------- fragment 动效克制化 ---------- */
.reveal .slides section .fragment.fade-up {
  transform: translateY(14px);
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.35s ease;
}
.reveal .slides section .fragment.fade-up.visible {
  transform: none;
  opacity: 1;
}

/* ---------- Reveal 控件配色 ---------- */
.reveal .progress { color: var(--accent); height: 4px; }
.reveal .slide-number {
  background: transparent;
  color: var(--muted);
  font-size: 0.5em;
  right: 14px;
  bottom: 10px;
}
.reveal .controls { color: var(--accent); }

/* 演讲者备注字体不放大 */
.reveal aside.notes { font-size: 16px; }

/* ---------- 演讲式信息层级 ---------- */
.eyebrow {
  color: var(--muted);
  font-size: 0.72em;
  font-weight: 600;
  margin-bottom: 0.45em;
}

.opening-options {
  display: flex;
  gap: 0.55em;
  margin-top: 1.2em;
}
.opening-options span {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper-raise);
  color: var(--ink-soft);
  font-size: 0.72em;
  padding: 0.55em 0.85em;
}
.opening-options b { color: var(--accent-deep); }

.hero-phrase {
  color: var(--accent-deep);
  font-size: 2.35em;
  font-weight: 750;
  letter-spacing: 0.02em;
  margin-top: 0.65em;
}
.contrast-line {
  display: grid;
  grid-template-columns: 9em 1fr;
  align-items: baseline;
  gap: 1em;
  width: min(28em, 100%);
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  padding: 0.45em 0;
}
.contrast-line span { color: var(--ink); font-size: 1.15em; font-weight: 700; }
.contrast-line i { font-style: normal; font-size: 0.8em; }
.contrast-line.active span,
.contrast-line.active i { color: var(--accent-deep); }

.takeaway {
  color: var(--ink-soft);
  font-size: 1.22em;
  font-weight: 700;
  line-height: 1.35 !important;
  margin-top: 0.75em !important;
}
.takeaway.small { font-size: 1.02em; }
.takeaway.center { text-align: center; }
.takeaway .em { color: var(--accent-deep); }

.explain-line {
  display: grid;
  grid-template-columns: max-content 1fr;
  align-items: baseline;
  gap: 0.75em;
  margin-top: 0.55em;
  border-left: 4px solid rgba(14,117,105,0.35);
  border-radius: 0 9px 9px 0;
  background: rgba(14,117,105,0.055);
  padding: 0.42em 0.65em;
  color: var(--ink-soft);
  font-size: 0.66em;
  line-height: 1.45;
}
.explain-line b {
  color: var(--accent-deep);
  font-size: 0.9em;
  white-space: nowrap;
}
.explain-line code {
  color: var(--ink);
  font: 650 0.92em 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif;
  background: rgba(28,31,36,0.06);
  border-radius: 5px;
  padding: 0.04em 0.28em;
}
.explain-line.compact { margin-top: 0.45em; }

.url-anatomy {
  display: flex;
  align-items: baseline;
  gap: 0.18em;
  margin-top: 0.65em;
  color: var(--muted);
  font: 500 0.66em 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif;
}
.url-anatomy b { color: var(--accent-deep); }
.url-anatomy i { color: var(--amber); font-style: normal; font-weight: 700; }

/* 四步路线：比列表更像一次逐渐走远的旅程 */
.intro-meta {
  color: var(--ink-soft);
  font-size: 0.68em;
  margin: 0.45em 0 0 !important;
}
.intro-meta strong { color: var(--accent-deep); font-weight: 650; }
.intro-meta + .journey { margin-top: 0.85em; }

.journey {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1.15fr;
  align-items: center;
  gap: 0.45em;
  margin-top: 1.35em;
}
.journey > i { color: var(--muted); font-style: normal; font-size: 1.15em; }
.journey-step {
  min-height: 4.2em;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper-raise);
  padding: 0.7em 0.8em;
}
.journey-step span { color: var(--accent); font: 600 0.5em 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif; }
.journey-step b { font-size: 1em; margin: 0.12em 0; }
.journey-step small { color: var(--muted); font-size: 0.62em; }
.journey-step small .tiny { font-size: 0.72em; opacity: 0.75; }
.journey-step.final { color: #fff; background: var(--accent); border-color: var(--accent); }
.journey-step.final span,
.journey-step.final small { color: rgba(255,255,255,0.75); }

/* 台阶页：固定进度标记，让内容升级时观众不迷路 */
.stage-marker {
  position: absolute;
  top: 2px;
  right: 42px;
  color: var(--muted);
  font: 600 0.52em 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif;
  letter-spacing: 0.08em;
}

/* 第七个主章节起内容偏高排布，收紧页首并给页底留出呼吸空间。 */
.reveal .slides > .bridge-slide,
.reveal .slides > .bridge-slide ~ section:not(:has(> section)),
.reveal .slides > .bridge-slide ~ section > section:not(.peak-slide) {
  translate: 0 -28px;
}

.concept-pair {
  display: flex;
  align-items: center;
  gap: 0.65em;
  margin-top: 0.65em;
  font-size: 1.1em;
  font-weight: 700;
}
.concept-pair span:first-child { color: var(--muted); }
.concept-pair i { color: var(--amber); font-style: normal; }
.concept-pair span:last-child { color: var(--accent-deep); }

.log-demo {
  display: grid;
  grid-template-columns: 1fr 7.2em;
  align-items: stretch;
  gap: 0.75em;
}
.log-demo .term { margin: 0; }
.metric {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-radius: 14px;
  background: var(--accent-soft);
  border: 1px solid rgba(14,117,105,0.22);
}
.metric strong { color: var(--accent-deep); font-size: 2.6em; line-height: 1; }
.metric span { color: var(--ink-soft); font-size: 0.58em; margin-top: 0.55em; }

.distance-flow {
  display: grid;
  grid-template-columns: 1fr 0.7fr 1fr;
  align-items: center;
  gap: 0.8em;
  margin-top: 1.25em;
}
.distance-node {
  display: flex;
  flex-direction: column;
  min-height: 4.2em;
  justify-content: center;
  border: 1.5px solid var(--line);
  border-radius: 18px;
  background: var(--paper-raise);
  padding: 0.75em 1em;
}
.distance-node small { color: var(--muted); font: 600 0.52em 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif; }
.distance-node strong { font-size: 1.12em; margin: 0.12em 0; }
.distance-node span { color: var(--muted); font-size: 0.62em; }
.distance-node.active { border-color: var(--accent); background: var(--accent-soft); }
.distance-node.active strong { color: var(--accent-deep); }
.distance-arrow { text-align: center; color: var(--muted); }
.distance-arrow span { display: block; font-size: 0.55em; }
.distance-arrow b { color: var(--accent); font-size: 2em; line-height: 1; }

.address-cards {
  display: grid;
  grid-template-columns: 1fr auto 0.8fr;
  align-items: center;
  gap: 0.55em;
  margin-top: 1.25em;
}
.address-cards > div {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper-raise);
  padding: 0.75em 1em;
}
.address-cards small { color: var(--muted); font-size: 0.55em; }
.address-cards strong { color: var(--accent-deep); font: 700 1.35em 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif; margin: 0.15em 0; }
.address-cards span { color: var(--ink-soft); font-size: 0.65em; }
.address-cards > b { color: var(--accent); font-size: 1.8em; }

.ethics-banner {
  display: flex;
  align-items: center;
  gap: 0.7em;
  border-left: 5px solid var(--amber);
  background: rgba(180,89,10,0.08);
  border-radius: 0 10px 10px 0;
  padding: 0.48em 0.7em;
  margin-bottom: 0.65em;
  font-size: 0.68em;
}
.ethics-banner b { color: var(--amber); }
.ethics-banner span { color: var(--ink-soft); }

/* 第四阶峰值：整页换气质，避免高潮仍像普通终端页 */
.reveal .slides section.peak-slide {
  height: 100%;
  padding: 48px 58px !important;
  border-radius: 24px;
  background:
    radial-gradient(700px 360px at 86% 0%, rgba(34,211,238,0.10), transparent 65%),
    var(--term-bg);
  color: var(--term-ink);
}
.peak-slide h2 { color: #fff; }
.peak-slide .kicker { color: var(--term-cyan); border-color: rgba(34,211,238,0.55); }
.peak-slide .stage-marker { top: 50px; right: 58px; color: var(--term-dim); }
.peak-slide .term { border: 1px solid rgba(255,255,255,0.10); box-shadow: none; }
.finding {
  display: flex;
  align-items: baseline;
  gap: 0.65em;
  margin-top: 0.55em;
}
.finding span { color: var(--term-dim); font-size: 0.72em; }
.finding strong { color: var(--term-amber); font-size: 1.55em; }
.peak-explain {
  display: flex;
  align-items: baseline;
  gap: 0.65em;
  color: var(--term-dim);
  font-size: 0.62em;
  margin-top: 0.65em;
}
.peak-explain b { color: var(--term-cyan); }
.boundary-note { color: var(--term-dim); font-size: 0.56em; margin-top: 0.6em !important; }

.client-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8em;
  margin-top: 1.1em;
}
.client-compare > div {
  display: flex;
  flex-direction: column;
  min-height: 4.3em;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper-raise);
  padding: 0.8em 1em;
}
.client-compare small { color: var(--accent); font: 600 0.6em 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif; }
.client-compare strong { font-size: 0.9em; margin: 0.3em 0; }
.client-compare span { color: var(--muted); font-size: 0.62em; }

.recap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.55em;
  margin-top: 1.15em;
}
.recap-grid > div {
  display: flex;
  flex-direction: column;
  min-height: 5.3em;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper-raise);
  padding: 0.7em;
}
.recap-grid span { color: var(--accent); font: 600 0.5em 'JetBrains Mono', 'Noto Sans SC Variable', monospace, sans-serif; }
.recap-grid b { font-size: 0.92em; margin: 0.22em 0 0.5em; }
.recap-grid small { color: var(--muted); font-size: 0.64em; line-height: 1.5; }
.recap-grid .accent { color: #fff; background: var(--accent); border-color: var(--accent); }
.recap-grid .accent span,
.recap-grid .accent small { color: rgba(255,255,255,0.78); }

.next-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.7em;
  margin-top: 1.25em;
}
.next-grid > div {
  display: flex;
  flex-direction: column;
  min-height: 5.2em;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper-raise);
  padding: 0.8em;
}
.next-grid span { color: var(--accent); font: 600 0.5em 'JetBrains Mono', monospace, sans-serif; }
.next-grid b { font-size: 0.85em; margin: auto 0 0.35em; }
.next-grid small { color: var(--muted); font-size: 0.6em; }
.next-grid .warm { background: var(--accent-soft); border-color: rgba(14,117,105,0.25); }

.closing-line {
  color: var(--ink-soft);
  font-size: 0.9em;
  margin-top: 1em !important;
}
.closing-line b { color: var(--accent-deep); }

/* ---------- 窄屏兜底（手机直接看 deck 的情况） ---------- */
@media (max-width: 760px) {
  .reveal { font-size: 26px; }
  .qr-row { flex-direction: column; align-items: flex-start; gap: 0.8em; }
  .chat-chip { position: static; display: inline-block; margin-top: 1em; }
  .journey, .recap-grid, .next-grid { grid-template-columns: 1fr 1fr; }
  .journey > i { display: none; }
}