/* ==========================================================================
   梁文锋纪念馆 · impress.js 定制主题
   黑金博物馆风 · 全屏 3D 演示
   ========================================================================== */

:root {
  --bg-dark: #05070b;
  --bg-panel: #12161f;
  --bg-panel-light: #1a2130;
  --ink: #ece9df;
  --ink-dim: #a8a598;
  --ink-faint: #66635a;
  --gold: #c9a86a;
  --gold-bright: #e6cb90;
  --gold-soft: rgba(201, 168, 106, 0.12);
  --line: #2b333f;
  --line-soft: #212834;
  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif SC", Georgia, serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-dark);
}

body {
  font-family: var(--sans);
  color: var(--ink);
  font-size: 16px;
}

::selection { background: var(--gold); color: #14181b; }

/* ---------- 星空粒子层 ---------- */
#stars {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ---------- impress 3D 舞台 ---------- */
#impress {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  perspective: 1600px;
}

.step {
  position: relative;
  width: min(1100px, 92vw);
  padding: 48px 0;
  margin: 0 auto;
  opacity: 0.22;
  transform-style: preserve-3d;
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.step.active { opacity: 1; }

.step.past { opacity: 0.35; }

/* ---------- 每页背景 ---------- */
.slide-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(13, 16, 24, 0.94), rgba(7, 9, 14, 0.97));
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.55);
}

.ch-opening .slide-bg {
  background:
    radial-gradient(900px 480px at 50% 34%, rgba(201, 168, 106, 0.13), transparent 62%),
    linear-gradient(180deg, rgba(13, 16, 24, 0.94), rgba(7, 9, 14, 0.97));
}

.ch-life .slide-bg {
  background:
    radial-gradient(820px 440px at 30% 50%, rgba(216, 140, 72, 0.12), transparent 60%),
    linear-gradient(180deg, rgba(14, 16, 22, 0.94), rgba(8, 10, 15, 0.97));
}

.ch-high-flyer .slide-bg {
  background:
    radial-gradient(820px 440px at 70% 45%, rgba(72, 160, 196, 0.12), transparent 60%),
    linear-gradient(180deg, rgba(12, 16, 22, 0.94), rgba(8, 10, 14, 0.97));
}

.ch-deepseek .slide-bg {
  background:
    radial-gradient(820px 460px at 50% 40%, rgba(128, 108, 214, 0.14), transparent 62%),
    linear-gradient(180deg, rgba(13, 13, 23, 0.94), rgba(8, 9, 15, 0.97));
}

.ch-timeline .slide-bg {
  background:
    radial-gradient(820px 440px at 55% 45%, rgba(64, 178, 160, 0.11), transparent 62%),
    linear-gradient(180deg, rgba(11, 17, 20, 0.94), rgba(7, 11, 13, 0.97));
}

.ch-thought .slide-bg {
  background:
    radial-gradient(820px 440px at 45% 42%, rgba(200, 120, 140, 0.11), transparent 62%),
    linear-gradient(180deg, rgba(17, 13, 18, 0.94), rgba(10, 8, 12, 0.97));
}

.ch-closing .slide-bg {
  background:
    radial-gradient(1100px 560px at 50% 48%, rgba(201, 168, 106, 0.18), transparent 64%),
    linear-gradient(180deg, rgba(15, 14, 10, 0.96), rgba(8, 7, 6, 0.98));
}

/* 中央光晕 */
.halo {
  position: absolute;
  left: 50%;
  top: 46%;
  width: 60vmin;
  height: 60vmin;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 168, 106, 0.13), transparent 65%);
  filter: blur(6px);
  animation: haloPulse 7s ease-in-out infinite;
  pointer-events: none;
}

@keyframes haloPulse {
  0%, 100% { opacity: 0.55; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.08); }
}

/* ---------- 通用版式 ---------- */
.slide-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 64px 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.kicker {
  font-size: 13px;
  letter-spacing: 6px;
  color: var(--gold);
  text-transform: uppercase;
  margin: 0 0 18px;
}

.decor-line {
  width: 72px;
  height: 1px;
  background: var(--gold);
  margin: 0 auto 30px;
}

/* ---------- 标题页 ---------- */
.main-title {
  font-family: var(--serif);
  font-size: 72px;
  letter-spacing: 14px;
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 26px;
}

.main-title em {
  font-style: normal;
  color: var(--gold);
}

.title-inner .lead {
  font-size: 16px;
  color: var(--ink-dim);
  line-height: 2.1;
  max-width: 640px;
  margin: 0 auto;
}

.title-inner .decor-line { margin-top: 34px; }

.title-inner .hint {
  margin-top: 26px;
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--ink-faint);
}

/* ---------- 章节页 ---------- */
.chapter-no {
  font-family: var(--serif);
  font-size: 26px;
  letter-spacing: 10px;
  color: var(--gold);
  margin: 0 0 20px;
}

.chapter-title {
  font-family: var(--serif);
  font-size: 56px;
  letter-spacing: 12px;
  font-weight: 600;
  margin: 0 0 26px;
}

.chapter-sub {
  font-size: 16px;
  color: var(--ink-dim);
  max-width: 620px;
  margin: 0 auto;
}

.mini-stats {
  display: flex;
  justify-content: center;
  gap: 64px;
  margin-top: 52px;
}

.mini-stat { text-align: center; }

.mini-num {
  font-family: var(--serif);
  font-size: 36px;
  color: var(--gold-bright);
  line-height: 1.2;
}

.mini-label {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--ink-faint);
  margin-top: 6px;
}

/* ---------- 内容页 ---------- */
.content-inner {
  flex-direction: row;
  gap: 64px;
  align-items: center;
  text-align: left;
}

.content-side {
  flex-shrink: 0;
  width: 170px;
  text-align: center;
}

.side-icon {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  color: var(--gold);
  filter: drop-shadow(0 0 28px rgba(201, 168, 106, 0.3));
  animation: iconFloat 5s ease-in-out infinite;
}

@keyframes iconFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

.side-icon svg { width: 100%; height: 100%; }

.side-icon svg path,
.side-icon svg circle,
.side-icon svg rect {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.side-icon.sm { width: 88px; height: 88px; animation: none; }

.side-year {
  margin-top: 18px;
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 3px;
  color: var(--gold);
}

.content-main { flex: 1; }

/* ---------- 实体照片卡片 ---------- */
.photo-card {
  flex-shrink: 0;
  width: 300px;
  margin: 0;
  padding: 10px;
  transform: rotate(-1.5deg);
  background: linear-gradient(165deg, rgba(201, 168, 106, 0.18), rgba(201, 168, 106, 0.04));
  border: 1px solid rgba(201, 168, 106, 0.35);
  box-shadow: 0 26px 60px rgba(0, 0, 0, 0.55);
}

.photo-card img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: sepia(0.14) contrast(1.06);
}

.photo-card figcaption {
  padding: 10px 4px 2px;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--gold);
  text-align: center;
}

.content-inner.has-photo { gap: 44px; }

.content-inner.has-photo .content-side { width: 90px; }

.content-inner.has-photo .content-side .side-icon { width: 70px; height: 70px; }

.content-inner.has-photo .content-main h2 { font-size: 32px; }

.title-inner.has-photo { padding-right: 340px; }

.title-inner.has-photo .photo-card {
  position: absolute;
  right: 44px;
  bottom: 36px;
  width: 250px;
}

.photo-card.landscape { width: 340px; }

.photo-card.landscape img { aspect-ratio: 16 / 10; }

.chapter-inner.has-photo { padding-right: 320px; }

.chapter-inner.has-photo .photo-card {
  position: absolute;
  right: 44px;
  top: 50%;
  width: 250px;
  transform: translateY(-50%) rotate(-1.5deg);
}

.stat-inner.has-photo { padding-right: 380px; }

.stat-inner.has-photo .photo-card {
  position: absolute;
  right: 44px;
  top: 50%;
  width: 300px;
  transform: translateY(-50%) rotate(-1.5deg);
}

.content-main h2 {
  font-family: var(--serif);
  font-size: 38px;
  letter-spacing: 5px;
  font-weight: 600;
  margin: 0 0 24px;
}

.points {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: left;
}

.points li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 14px;
  font-size: 15.5px;
  color: var(--ink-dim);
  line-height: 1.9;
}

.points li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  width: 8px;
  height: 8px;
  background: var(--gold);
  transform: rotate(45deg);
}

.point-quote {
  margin-top: 22px;
  padding: 16px 22px;
  border-left: 3px solid var(--gold);
  background: var(--gold-soft);
  font-family: var(--serif);
  font-size: 15px;
  color: var(--gold-bright);
  line-height: 1.9;
  text-align: left;
}

/* ---------- 数据页 ---------- */
.stat-inner {
  text-align: left;
  align-items: flex-start;
}

.stat-head {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-bottom: 20px;
  width: 100%;
}

.stat-titles h2 {
  font-family: var(--serif);
  font-size: 36px;
  letter-spacing: 5px;
  font-weight: 600;
  margin: 6px 0 0;
}

.stat-titles .kicker { margin-bottom: 0; }

.stat-intro {
  font-size: 14px;
  color: var(--ink-dim);
  margin: 0 0 28px;
  width: 100%;
}

.big-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 22px;
  width: 100%;
}

.big-stat {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)) , var(--bg-panel);
  border: 1px solid var(--line);
  padding: 30px 20px;
  text-align: center;
  transition: border-color 0.35s ease, transform 0.35s ease, box-shadow 0.35s ease;
}

.big-num {
  font-family: var(--serif);
  font-size: 40px;
  color: var(--gold-bright);
  line-height: 1.25;
}

.big-label {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--ink-faint);
  margin-top: 10px;
}

/* ---------- 语录页 ---------- */
.quote-icon {
  width: 84px;
  height: 84px;
  margin: 0 auto 20px;
  color: var(--gold);
  opacity: 0.9;
  filter: drop-shadow(0 0 24px rgba(201, 168, 106, 0.35));
}

.quote-icon svg { width: 100%; height: 100%; }

.quote-icon svg path,
.quote-icon svg circle,
.quote-icon svg rect {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.quote-tag {
  font-size: 13px;
  letter-spacing: 6px;
  color: var(--gold);
  margin: 0 0 26px;
}

.quote-inner blockquote {
  font-family: var(--serif);
  font-size: 30px;
  letter-spacing: 2px;
  line-height: 1.9;
  max-width: 800px;
  margin: 0 auto;
}

.quote-inner cite {
  display: block;
  margin-top: 28px;
  font-style: normal;
  font-size: 14px;
  letter-spacing: 2px;
  color: var(--ink-faint);
}

/* ---------- 时间轴页 ---------- */
.timeline-inner .kicker {
  font-family: var(--serif);
  font-size: 26px;
  letter-spacing: 5px;
  color: var(--ink);
  margin-bottom: 52px;
}

.tl-line {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  align-items: stretch;
}

.tl-node {
  flex: 0 1 138px;
  position: relative;
  padding-top: 24px;
  border-top: 2px solid var(--line);
  transition: border-color 0.3s ease;
}

.tl-node::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  background: var(--bg-dark);
  border: 2px solid var(--gold);
  transform: rotate(45deg);
}

.tl-y {
  display: block;
  font-family: var(--serif);
  font-size: 18px;
  color: var(--gold-bright);
  margin-bottom: 6px;
}

.tl-t {
  display: block;
  font-size: 12.5px;
  color: var(--ink-dim);
  line-height: 1.6;
}

/* ---------- 结语页 ---------- */
.closing-inner h2 {
  font-family: var(--serif);
  font-size: 42px;
  letter-spacing: 8px;
  font-weight: 600;
  margin: 0 0 34px;
}

.closing-inner .points { display: inline-block; }

.closing-quote {
  margin-top: 34px;
  font-family: var(--serif);
  font-size: 18px;
  letter-spacing: 6px;
  color: var(--gold);
}

/* ---------- 内容进入动画（step 激活时逐条播放） ---------- */
.step .points li,
.step .big-stat,
.step .tl-node,
.step .mini-stat,
.step .point-quote {
  opacity: 0;
}

.step.active .points li,
.step.active .big-stat,
.step.active .tl-node,
.step.active .mini-stat,
.step.active .point-quote {
  animation: lwfFadeUp 0.65s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
}

.step.active .points li:nth-child(2),
.step.active .big-stat:nth-child(2),
.step.active .tl-node:nth-child(2),
.step.active .mini-stat:nth-child(2) { animation-delay: 0.12s; }

.step.active .points li:nth-child(3),
.step.active .big-stat:nth-child(3),
.step.active .tl-node:nth-child(3),
.step.active .mini-stat:nth-child(3) { animation-delay: 0.24s; }

.step.active .points li:nth-child(4),
.step.active .big-stat:nth-child(4),
.step.active .tl-node:nth-child(4),
.step.active .mini-stat:nth-child(4) { animation-delay: 0.36s; }

.step.active .points li:nth-child(5),
.step.active .big-stat:nth-child(5),
.step.active .tl-node:nth-child(5),
.step.active .mini-stat:nth-child(5) { animation-delay: 0.48s; }

.step.active .points li:nth-child(6),
.step.active .tl-node:nth-child(6) { animation-delay: 0.6s; }

.step.active .point-quote { animation-delay: 0.4s; }

@keyframes lwfFadeUp {
  from { opacity: 0; transform: translateY(26px); filter: blur(3px); }
  to { opacity: 1; transform: none; filter: blur(0); }
}

/* 标题入场 */
.step.active .main-title { animation: lwfTitleIn 1s cubic-bezier(0.2, 0.7, 0.2, 1) both; }

@keyframes lwfTitleIn {
  from { opacity: 0; transform: translateY(24px); letter-spacing: 24px; filter: blur(6px); }
  to { opacity: 1; transform: none; letter-spacing: 14px; filter: blur(0); }
}

.step.active .chapter-title { animation: lwfTitleIn 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) both; }

/* ---------- 不支持提示 ---------- */
body.impress-supported .fallback-message { display: none; }

body.impress-not-supported #impress,
body.impress-not-supported #stars { display: none; }

.impress-not-supported .step { position: relative; opacity: 1; margin: 20px auto; }

.fallback-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 50;
  width: min(560px, 86vw);
  padding: 28px 32px;
  text-align: center;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-dim);
  background: var(--bg-panel);
  border: 1px solid var(--line);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.5);
}

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .step { width: 96vw; }
  .slide-inner { padding: 40px 26px; }
  .main-title { font-size: 42px; letter-spacing: 8px; }
  .chapter-title { font-size: 36px; }
  .content-inner { flex-direction: column; gap: 26px; }
  .content-side { width: auto; }
  .content-side .side-icon { width: 78px; height: 78px; }
  .content-main h2 { font-size: 26px; }
  .quote-inner blockquote { font-size: 21px; }
  .mini-stats { gap: 30px; }
  .big-stats { grid-template-columns: repeat(2, 1fr); }

  /* 小屏下照片卡片回归正常流，避免 padding 挤没正文 */
  .title-inner.has-photo,
  .chapter-inner.has-photo,
  .stat-inner.has-photo { padding-right: 0; }

  .title-inner.has-photo .photo-card,
  .chapter-inner.has-photo .photo-card,
  .stat-inner.has-photo .photo-card {
    position: static;
    transform: none;
    margin: 26px auto 0;
  }

  .content-inner.has-photo { gap: 22px; }
  .content-inner.has-photo .content-side { width: auto; }
  .content-inner.has-photo .content-main h2 { font-size: 24px; }

  .photo-card,
  .photo-card.landscape { width: min(340px, 74vw); }

  .big-stats { grid-template-columns: 1fr; }
}

/* 短屏（移动端横屏）压缩排版 */
@media (max-height: 500px) {
  .slide-inner { padding: 22px 20px; }
  .main-title { font-size: 32px; letter-spacing: 5px; }
  .chapter-title { font-size: 28px; }
  .content-inner { flex-direction: row; gap: 18px; }
  .content-inner .content-side { width: auto; }
  .content-main h2 { font-size: 22px; margin-bottom: 12px; }
  .points li { font-size: 15px; line-height: 1.6; margin-bottom: 8px; }
  .quote-inner blockquote { font-size: 19px; }
  .mini-stats { gap: 16px; }
  .big-stats { grid-template-columns: repeat(2, 1fr); }
  .side-icon { width: 52px; height: 52px; }
  .photo-card,
  .photo-card.landscape { width: 150px; }
}

/* ---------- 移动端横屏引导 ---------- */
.rotate-hint {
  display: none;
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  z-index: 90;
  max-width: 88vw;
  padding: 9px 22px;
  font-size: 13px;
  letter-spacing: 3px;
  white-space: nowrap;
  color: var(--gold);
  background: rgba(10, 12, 18, 0.88);
  border: 1px solid rgba(201, 168, 106, 0.35);
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
}

@media (orientation: portrait) and (pointer: coarse) {
  .rotate-hint { display: block; }
  .rotate-hint.show { opacity: 1; }
}

/* ---------- 手机竖屏线性模式 ---------- */
body.mobile-linear {
  height: auto;
  min-height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  scroll-snap-type: y mandatory;
  -webkit-overflow-scrolling: touch;
}

body.mobile-linear .impress-not-supported,
body.mobile-linear .rotate-hint {
  display: none !important;
}

body.mobile-linear #impress {
  width: 100%;
  height: auto;
  min-height: 100svh;
  perspective: none;
}

body.mobile-linear .step {
  width: 100%;
  min-height: 100svh;
  margin: 0;
  padding: 16px 14px 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transform: none !important;
  transition: none;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

body.mobile-linear .slide-bg {
  border-left: 0;
  border-right: 0;
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.42);
}

body.mobile-linear .slide-inner {
  min-height: calc(100svh - 74px);
  padding: 30px 22px;
}

body.mobile-linear .step .points li,
body.mobile-linear .step .big-stat,
body.mobile-linear .step .tl-node,
body.mobile-linear .step .mini-stat,
body.mobile-linear .step .point-quote,
body.mobile-linear .step .main-title,
body.mobile-linear .step .chapter-title {
  opacity: 1;
  animation: none;
  transform: none;
  filter: none;
}

body.mobile-linear .kicker {
  margin-bottom: 14px;
  font-size: 11px;
  letter-spacing: 4px;
}

body.mobile-linear .decor-line {
  margin-bottom: 20px;
}

body.mobile-linear .main-title {
  font-size: clamp(34px, 12vw, 48px);
  letter-spacing: 6px;
  line-height: 1.22;
  margin-bottom: 18px;
}

body.mobile-linear .title-inner .lead {
  font-size: 14px;
  line-height: 1.85;
}

body.mobile-linear .title-inner .hint {
  margin-top: 18px;
  font-size: 11px;
  letter-spacing: 2px;
}

body.mobile-linear .chapter-no {
  font-size: 18px;
  letter-spacing: 6px;
  margin-bottom: 12px;
}

body.mobile-linear .chapter-title {
  font-size: clamp(30px, 10vw, 40px);
  letter-spacing: 6px;
  margin-bottom: 16px;
}

body.mobile-linear .chapter-sub {
  font-size: 14px;
  line-height: 1.8;
}

body.mobile-linear .mini-stats {
  width: 100%;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 28px;
}

body.mobile-linear .mini-stat {
  min-width: 86px;
}

body.mobile-linear .mini-num {
  font-size: 28px;
}

body.mobile-linear .content-inner,
body.mobile-linear .content-inner.has-photo {
  flex-direction: column;
  gap: 18px;
  align-items: center;
  text-align: center;
}

body.mobile-linear .content-side,
body.mobile-linear .content-inner.has-photo .content-side {
  width: auto;
}

body.mobile-linear .side-icon,
body.mobile-linear .content-inner.has-photo .content-side .side-icon {
  width: 54px;
  height: 54px;
}

body.mobile-linear .side-year {
  margin-top: 8px;
  font-size: 16px;
}

body.mobile-linear .content-main h2,
body.mobile-linear .content-inner.has-photo .content-main h2,
body.mobile-linear .stat-titles h2,
body.mobile-linear .closing-inner h2 {
  font-size: clamp(24px, 7.5vw, 32px);
  letter-spacing: 3px;
  line-height: 1.32;
  margin-bottom: 16px;
  text-align: center;
}

body.mobile-linear .points li {
  padding-left: 22px;
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.72;
}

body.mobile-linear .points li::before {
  left: 2px;
  top: 0.72em;
}

body.mobile-linear .point-quote,
body.mobile-linear .closing-quote {
  margin-top: 16px;
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.72;
}

body.mobile-linear .title-inner.has-photo,
body.mobile-linear .chapter-inner.has-photo,
body.mobile-linear .stat-inner.has-photo {
  padding-right: 22px;
}

body.mobile-linear .title-inner.has-photo .photo-card,
body.mobile-linear .chapter-inner.has-photo .photo-card,
body.mobile-linear .stat-inner.has-photo .photo-card,
body.mobile-linear .photo-card,
body.mobile-linear .photo-card.landscape {
  position: static;
  width: min(260px, 76vw);
  margin: 18px auto 0;
  transform: none;
}

body.mobile-linear .photo-card figcaption {
  font-size: 11px;
  letter-spacing: 2px;
}

body.mobile-linear .stat-head {
  flex-direction: column;
  gap: 12px;
  text-align: center;
}

body.mobile-linear .side-icon.sm {
  width: 52px;
  height: 52px;
}

body.mobile-linear .stat-intro {
  font-size: 14px;
  line-height: 1.72;
}

body.mobile-linear .big-stats {
  grid-template-columns: 1fr;
  gap: 12px;
}

body.mobile-linear .big-stat {
  padding: 15px 14px;
}

body.mobile-linear .big-num {
  font-size: 32px;
}

body.mobile-linear .timeline-inner {
  align-items: stretch;
  text-align: left;
}

body.mobile-linear .tl-line {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

body.mobile-linear .tl-node {
  width: 100%;
  padding: 14px 16px;
}

body.mobile-linear .tl-y {
  font-size: 18px;
}

body.mobile-linear .tl-t {
  font-size: 14px;
  line-height: 1.65;
}

body.mobile-linear .quote-inner blockquote {
  font-size: clamp(22px, 7.5vw, 32px);
  line-height: 1.48;
}

body.mobile-linear .quote-inner cite,
body.mobile-linear .quote-tag {
  font-size: 12px;
}

/* 手机竖屏最终阅读优化：去桌面缩略感，避免中文标题竖排 */
body.mobile-linear .step {
  min-height: 100dvh;
  padding: 0;
}

body.mobile-linear .slide-bg {
  inset: 0;
  border: 0;
  box-shadow: none;
}

body.mobile-linear .slide-inner {
  width: 100%;
  min-height: 100dvh;
  padding: 28px 18px 34px;
  justify-content: center;
}

body.mobile-linear .title-inner.has-photo,
body.mobile-linear .chapter-inner.has-photo,
body.mobile-linear .stat-inner.has-photo {
  padding-right: 18px;
}

body.mobile-linear .main-title,
body.mobile-linear .chapter-title,
body.mobile-linear .content-main h2,
body.mobile-linear .content-inner.has-photo .content-main h2,
body.mobile-linear .stat-titles h2,
body.mobile-linear .closing-inner h2,
body.mobile-linear .kicker,
body.mobile-linear .chapter-no,
body.mobile-linear .side-year,
body.mobile-linear .mini-label,
body.mobile-linear .photo-card figcaption,
body.mobile-linear .title-inner .hint {
  letter-spacing: 0;
  word-break: keep-all;
}

body.mobile-linear .main-title {
  font-size: clamp(36px, 11vw, 46px);
  line-height: 1.15;
}

body.mobile-linear .chapter-title {
  font-size: clamp(32px, 9.5vw, 40px);
  line-height: 1.18;
}

body.mobile-linear .content-main,
body.mobile-linear .stat-inner,
body.mobile-linear .closing-inner,
body.mobile-linear .quote-inner,
body.mobile-linear .timeline-inner {
  width: 100%;
}

body.mobile-linear .content-main h2,
body.mobile-linear .content-inner.has-photo .content-main h2,
body.mobile-linear .stat-titles h2,
body.mobile-linear .closing-inner h2 {
  font-size: clamp(26px, 7.2vw, 32px);
  line-height: 1.24;
  margin-bottom: 18px;
}

body.mobile-linear .content-side {
  margin-bottom: 2px;
}

body.mobile-linear .side-icon,
body.mobile-linear .content-inner.has-photo .content-side .side-icon,
body.mobile-linear .side-icon.sm {
  display: none;
}

body.mobile-linear .side-year,
body.mobile-linear .kicker,
body.mobile-linear .quote-tag {
  font-size: 13px;
  color: var(--gold-bright);
}

body.mobile-linear .points {
  width: 100%;
}

body.mobile-linear .points li {
  padding-left: 18px;
  margin-bottom: 12px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(236, 233, 223, 0.86);
}

body.mobile-linear .point-quote,
body.mobile-linear .closing-quote,
body.mobile-linear .stat-intro,
body.mobile-linear .chapter-sub,
body.mobile-linear .title-inner .lead {
  font-size: 15px;
  line-height: 1.78;
}

body.mobile-linear .photo-card,
body.mobile-linear .photo-card.landscape,
body.mobile-linear .title-inner.has-photo .photo-card,
body.mobile-linear .chapter-inner.has-photo .photo-card,
body.mobile-linear .stat-inner.has-photo .photo-card {
  width: min(320px, 86vw);
  margin-top: 20px;
}

body.mobile-linear .mini-stats {
  gap: 12px;
}

body.mobile-linear .mini-stat {
  min-width: 78px;
}

body.mobile-linear .big-stat {
  padding: 18px 16px;
}

body.mobile-linear .big-num {
  font-size: 38px;
}

body.mobile-linear .quote-inner blockquote {
  font-size: clamp(28px, 8vw, 36px);
  line-height: 1.38;
}