/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   睿冠杯 V5RC 规则手册 · 视觉系统
   编辑杂志 × 比赛海报 · 2026-05-15
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

:root {
  /* 色板（OKLCH 温润调，避开 AI 标配 cyan/neon） */
  --rg-cream: oklch(96% 0.018 80);          /* 暖白底 */
  --rg-paper: oklch(98% 0.012 80);           /* 更亮一档 */
  --rg-ink: oklch(20% 0.025 250);            /* 深墨色（不是纯黑） */
  --rg-ink-soft: oklch(35% 0.025 250);
  --rg-ink-faint: oklch(60% 0.015 250);
  --rg-red: oklch(58% 0.20 25);              /* VEX 红，温润版 */
  --rg-red-dim: oklch(85% 0.10 25);
  --rg-blue: oklch(50% 0.18 245);            /* VEX 蓝，沉稳版 */
  --rg-blue-dim: oklch(85% 0.08 245);
  --rg-mustard: oklch(78% 0.16 80);          /* 暖芥黄强调色 */
  --rg-line: oklch(85% 0.012 80);
  --rg-line-soft: oklch(92% 0.010 80);

  /* 字体 */
  --rg-serif: 'Fraunces', 'Noto Serif SC', Georgia, serif;
  --rg-sans: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --rg-display: 'Noto Serif SC', 'Fraunces', Georgia, serif;

  /* 排版尺度 — fluid clamp */
  --rg-pagenum: clamp(8rem, 24vw, 22rem);    /* 巨型页码 */
  --rg-h1: clamp(3rem, 8vw, 6.5rem);
  --rg-h2: clamp(2.2rem, 5vw, 4.2rem);
  --rg-h3: clamp(1.4rem, 2.4vw, 1.9rem);
  --rg-body: clamp(1rem, 1.3vw, 1.15rem);
  --rg-small: clamp(0.82rem, 1vw, 0.92rem);

  /* 间距节奏 */
  --rg-pad-x: clamp(2rem, 6vw, 6rem);
  --rg-pad-y: clamp(3rem, 8vh, 6rem);
}

/* ━━━━━━━━ Base ━━━━━━━━ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
}

body {
  font-family: var(--rg-sans);
  font-size: var(--rg-body);
  line-height: 1.55;
  color: var(--rg-ink);
  background: var(--rg-cream);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt", "kern";
  overflow-x: hidden;
}

em {
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 800;
  font-feature-settings: "ss01", "salt";
}

strong { font-weight: 700; }
a { color: var(--rg-blue); text-decoration: none; border-bottom: 1px solid currentColor; }
a:hover { color: var(--rg-red); }

/* ━━━━━━━━ 顶部导航 ━━━━━━━━ */
.rg-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: clamp(54px, 6vh, 70px);
  padding: 0 var(--rg-pad-x);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  align-items: center;
  z-index: 100;
  background: color-mix(in oklch, var(--rg-cream) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rg-line);
}

.rg-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--rg-ink);
  border: none;
  font-family: var(--rg-display);
  font-weight: 900;
}

.rg-logo img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.rg-logo__text {
  font-size: 1rem;
  letter-spacing: 0.05em;
}

.rg-progress {
  height: 2px;
  background: var(--rg-line);
  position: relative;
  margin: 0 1rem;
}

.rg-progress__bar {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0%;
  background: var(--rg-ink);
  transition: width 280ms cubic-bezier(0.22, 1, 0.36, 1);
}

.rg-pager {
  font-family: var(--rg-serif);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  color: var(--rg-ink-soft);
}

.rg-pager__current {
  font-style: italic;
  font-weight: 700;
  color: var(--rg-ink);
}

.rg-pager__sep {
  margin: 0 0.4rem;
  color: var(--rg-ink-faint);
}

/* ━━━━━━━━ 页面通用 ━━━━━━━━ */
.rg-deck {
  width: 100%;
}

.rg-page {
  min-height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  position: relative;
  padding: calc(clamp(54px, 6vh, 70px) + var(--rg-pad-y)) var(--rg-pad-x) var(--rg-pad-y);
  overflow: hidden;
}

.rg-page__inner {
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.rg-page__pagemark {
  position: absolute;
  right: clamp(-2rem, -2vw, -1rem);
  bottom: clamp(-3rem, -4vw, -2rem);
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  font-size: var(--rg-pagenum);
  line-height: 1;
  color: var(--rg-line-soft);
  pointer-events: none;
  z-index: 1;
  user-select: none;
}

.rg-page--starred .rg-page__pagemark {
  color: oklch(94% 0.07 25);
}

.rg-eyebrow {
  font-family: var(--rg-serif);
  font-style: italic;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: var(--rg-ink-faint);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.rg-h2 {
  font-family: var(--rg-display);
  font-size: var(--rg-h2);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.2rem;
  color: var(--rg-ink);
}

.rg-h2 em {
  color: var(--rg-red);
}

.rg-h2__small {
  font-family: var(--rg-sans);
  font-size: 0.45em;
  font-weight: 500;
  vertical-align: 0.45em;
  color: var(--rg-ink-soft);
  margin: 0 0.1em;
}

.rg-lead {
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  color: var(--rg-ink-soft);
  margin-bottom: 2.5rem;
  max-width: 64ch;
}

.rg-note {
  margin-top: 2rem;
  padding: 1.2rem 1.5rem;
  border-left: 3px solid var(--rg-mustard);
  background: color-mix(in oklch, var(--rg-mustard) 12%, transparent);
  color: var(--rg-ink-soft);
  font-size: 0.95rem;
  max-width: 70ch;
}

/* 核心改动星标 */
.rg-star {
  position: absolute;
  top: clamp(80px, 9vh, 100px);
  right: var(--rg-pad-x);
  width: clamp(48px, 5vw, 60px);
  height: clamp(48px, 5vw, 60px);
  display: grid;
  place-items: center;
  background: var(--rg-red);
  color: var(--rg-cream);
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  font-weight: 900;
  border-radius: 50%;
  z-index: 3;
  box-shadow: 0 4px 24px color-mix(in oklch, var(--rg-red) 35%, transparent);
}

.rg-page--starred {
  background: linear-gradient(180deg, var(--rg-cream) 0%, oklch(94% 0.025 25) 100%);
}

.rg-page--starred::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: var(--rg-red);
  z-index: 4;
}

/* ━━━━━━━━ 页 1 封面 ━━━━━━━━ */
.rg-page--cover {
  background:
    radial-gradient(ellipse at 100% 50%, color-mix(in oklch, var(--rg-blue) 6%, var(--rg-paper)) 0%, var(--rg-cream) 70%);
  color: var(--rg-ink);
  padding: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.rg-cover__grid {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1280px;
  padding: var(--rg-pad-y) var(--rg-pad-x);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

@media (max-width: 768px) {
  .rg-cover__grid { grid-template-columns: 1fr; }
}

.rg-cover__left {
  display: grid;
  gap: 1.2rem;
}

.rg-cover__right {
  display: grid;
  place-items: center;
  position: relative;
}

.rg-cover__logo {
  width: clamp(220px, 32vw, 460px);
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 12px 40px color-mix(in oklch, var(--rg-blue) 20%, transparent));
  animation: rg-cover-logo-float 6s ease-in-out infinite;
}

@keyframes rg-cover-logo-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.rg-cover__eyebrow {
  font-family: var(--rg-serif);
  font-style: italic;
  font-size: clamp(0.9rem, 1.2vw, 1.05rem);
  letter-spacing: 0.12em;
  color: var(--rg-red);
  text-transform: uppercase;
}

.rg-cover__title {
  font-family: var(--rg-display);
  font-size: var(--rg-h1);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin: 0.5rem 0;
}

.rg-cover__line1 {
  display: block;
}

.rg-cover__line2 {
  display: block;
  color: var(--rg-ink);
}

.rg-cover__line2 em {
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  color: var(--rg-red);
  margin-right: 0.2em;
}

.rg-cover__sub {
  font-size: clamp(1.1rem, 1.8vw, 1.5rem);
  color: var(--rg-ink-soft);
  font-weight: 400;
  margin-top: 1rem;
}

.rg-cover__sub strong {
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 800;
  color: var(--rg-red);
}

.rg-cover__scroll {
  margin-top: 3rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--rg-ink-faint);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

.rg-cover__arrow {
  animation: rg-bounce 2.5s ease-in-out infinite;
  display: inline-block;
  font-size: 1.2rem;
}

@keyframes rg-bounce {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(6px); opacity: 1; }
}

.rg-cover__pagemark {
  position: absolute;
  right: 0;
  bottom: -2rem;
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  font-size: var(--rg-pagenum);
  line-height: 1;
  color: color-mix(in oklch, var(--rg-ink) 5%, transparent);
  pointer-events: none;
  z-index: 1;
  user-select: none;
}

/* ━━━━━━━━ 页 2 场地 ━━━━━━━━ */
.rg-field__split {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
  margin-top: 2rem;
}

@container (max-width: 768px) {
  .rg-field__split { grid-template-columns: 1fr; }
}

.rg-field__image {
  text-align: center;
}

.rg-field__image img,
.rg-field__svg {
  width: 100%;
  max-width: 540px;
  height: auto;
  border-radius: 4px;
  background: var(--rg-paper);
  box-shadow: 0 8px 40px color-mix(in oklch, var(--rg-ink) 10%, transparent);
  padding: 1rem;
}

.rg-field__svg {
  display: block;
}

.rg-field__image figcaption {
  margin-top: 1rem;
  font-family: var(--rg-serif);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--rg-ink-faint);
}

.rg-field__list {
  list-style: none;
  display: grid;
  gap: 1.6rem;
}

.rg-field__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  align-items: baseline;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--rg-line);
}

.rg-field__list li:last-child {
  border-bottom: none;
}

.rg-field__num {
  font-family: var(--rg-serif);
  font-style: italic;
  font-size: clamp(2.4rem, 4vw, 3.5rem);
  font-weight: 900;
  line-height: 1;
  color: var(--rg-red);
}

.rg-field__list h3 {
  font-family: var(--rg-display);
  font-weight: 900;
  font-size: var(--rg-h3);
  margin-bottom: 0.3rem;
}

.rg-field__list p {
  color: var(--rg-ink-soft);
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .rg-field__split { grid-template-columns: 1fr; }
}

/* ━━━━━━━━ 页 3 棱块预放 ━━━━━━━━ */
.rg-blocks__layout {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
}

.rg-bridge {
  background: var(--rg-paper);
  border: 1px solid var(--rg-line);
  padding: 1.5rem;
  border-radius: 4px;
}

.rg-bridge__label {
  font-family: var(--rg-serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--rg-ink-faint);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.rg-bridge__track {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: oklch(98% 0.015 240);
  border-radius: 2px;
}

.rg-bridge__track--mixed {
  grid-template-columns: 1fr auto;
}

.rg-bridge__side {
  display: grid;
  gap: 0.6rem;
}

.rg-bridge__side--red-zone {
  background: linear-gradient(135deg, color-mix(in oklch, var(--rg-red) 8%, transparent) 0%, transparent 100%);
  padding: 0.8rem;
  border-radius: 2px;
}

.rg-bridge__side--blue-zone {
  background: linear-gradient(135deg, transparent 0%, color-mix(in oklch, var(--rg-blue) 8%, transparent) 100%);
  padding: 0.8rem;
  border-radius: 2px;
}

.rg-bridge__zone-label {
  font-size: 0.78rem;
  color: var(--rg-ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.rg-bridge__white-line {
  width: 2px;
  height: 60px;
  background: var(--rg-ink-faint);
  opacity: 0.5;
}

.rg-bridge__count {
  font-family: var(--rg-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--rg-ink-soft);
  letter-spacing: 0.02em;
}

.rg-bridge__count em {
  font-size: 1.6em;
  color: var(--rg-ink);
}

.rg-cubes {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.rg-cubes--mixed {
  gap: 6px;
}

.rg-cube {
  width: 26px;
  height: 26px;
  border-radius: 3px;
  box-shadow: inset 0 -3px 0 color-mix(in oklch, currentColor 25%, transparent), 0 2px 4px color-mix(in oklch, var(--rg-ink) 10%, transparent);
}

.rg-cube--red {
  background: var(--rg-red);
  color: var(--rg-red);
}

.rg-cube--blue {
  background: var(--rg-blue);
  color: var(--rg-blue);
}

.rg-distribution {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2rem;
  font-size: 0.95rem;
}

.rg-distribution th,
.rg-distribution td {
  text-align: left;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--rg-line);
}

.rg-distribution th {
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 600;
  color: var(--rg-ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  padding-bottom: 0.5rem;
}

.rg-distribution td em {
  font-size: 1.2em;
  color: var(--rg-red);
}

.rg-distribution__sum td {
  font-weight: 700;
  background: oklch(96% 0.02 80);
}

.rg-distribution__sum td em {
  font-size: 1.6em;
}

/* ━━━━━━━━ 页 4 得分 ━━━━━━━━ */
.rg-scoring__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0;
  margin-top: 1rem;
  border-top: 2px solid var(--rg-ink);
  border-left: 2px solid var(--rg-ink);
}

.rg-scoring__item {
  padding: 1.8rem 1.5rem;
  border-right: 2px solid var(--rg-ink);
  border-bottom: 2px solid var(--rg-ink);
  background: var(--rg-paper);
  display: grid;
  align-content: space-between;
  gap: 0.8rem;
  min-height: 160px;
  position: relative;
}

.rg-scoring__big {
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}

.rg-scoring__big em {
  font-size: 1em;
  color: var(--rg-ink);
  font-style: italic;
}

.rg-scoring__big span {
  font-size: 0.32em;
  font-family: var(--rg-sans);
  font-style: normal;
  font-weight: 500;
  color: var(--rg-ink-soft);
}

.rg-scoring__label {
  font-size: 0.95rem;
  color: var(--rg-ink-soft);
  line-height: 1.4;
}

.rg-scoring__item--star {
  background: var(--rg-ink);
  color: var(--rg-cream);
}

.rg-scoring__item--star .rg-scoring__big em {
  color: var(--rg-mustard);
}

.rg-scoring__item--star .rg-scoring__big span,
.rg-scoring__item--star .rg-scoring__label {
  color: color-mix(in oklch, var(--rg-cream) 80%, transparent);
}

.rg-tag {
  display: inline-block;
  margin-left: 0.4rem;
  color: var(--rg-mustard);
  font-size: 1.2em;
}

.rg-example {
  margin-top: 3rem;
  padding: 2rem;
  background: oklch(94% 0.04 80);
  border-left: 4px solid var(--rg-mustard);
}

.rg-example__label {
  font-family: var(--rg-serif);
  font-style: italic;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--rg-ink-faint);
  margin-bottom: 0.8rem;
}

.rg-example__body {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.6;
}

.rg-example__body em {
  color: var(--rg-red);
}

.rg-example__eq {
  font-family: var(--rg-serif);
  font-style: italic;
  margin: 0 0.6em;
  color: var(--rg-ink-soft);
}

.rg-example__total {
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  font-size: 1.5em;
  color: var(--rg-ink);
  background: var(--rg-mustard);
  padding: 0.05em 0.3em;
  border-radius: 2px;
}

/* ━━━━━━━━ 页 5 占领 ━━━━━━━━ */
.rg-versus {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  margin-top: 2rem;
  background: var(--rg-ink);
  border: 2px solid var(--rg-ink);
}

@media (max-width: 640px) {
  .rg-versus { grid-template-columns: 1fr; }
}

.rg-versus__col {
  background: var(--rg-paper);
  padding: 2.5rem 2rem;
  text-align: center;
}

.rg-versus__col--before {
  background: oklch(94% 0.012 25);
}

.rg-versus__col--after {
  background: oklch(94% 0.04 25);
}

.rg-versus__tag {
  font-family: var(--rg-serif);
  font-style: italic;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--rg-ink-faint);
  margin-bottom: 1.5rem;
}

.rg-versus__icon {
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(3.5rem, 6vw, 5rem);
  line-height: 1;
  margin-bottom: 1rem;
}

.rg-versus__col--before .rg-versus__icon { color: var(--rg-ink-faint); }
.rg-versus__col--after .rg-versus__icon { color: var(--rg-red); }

.rg-versus__text {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--rg-ink-soft);
  line-height: 1.5;
}

.rg-rules {
  list-style: none;
  margin-top: 3rem;
  display: grid;
  gap: 0.5rem;
  max-width: 60ch;
}

.rg-rules li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--rg-line);
  font-size: 1.05rem;
}

.rg-rules li::before {
  content: '— ';
  color: var(--rg-red);
  font-weight: 700;
}

.rg-rules li em {
  color: var(--rg-red);
}

/* ━━━━━━━━ 页 6 停泊 ━━━━━━━━ */
.rg-park__cases {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

@media (max-width: 768px) {
  .rg-park__cases { grid-template-columns: repeat(2, 1fr); }
}

.rg-park__case {
  padding: 1.5rem 1rem;
  background: var(--rg-paper);
  border: 1px solid var(--rg-line);
  border-radius: 4px;
  text-align: center;
}

.rg-park__diagram {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  background: oklch(96% 0.01 240);
  border-radius: 4px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.rg-park__zone {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 50%;
  height: 50%;
  transform: translate(-50%, -50%);
  border: 3px dashed var(--rg-blue);
  background: color-mix(in oklch, var(--rg-blue) 8%, transparent);
  border-radius: 2px;
}

/* 结构件外圈：表示物理塑料挤压件围栏（投影 + 结构两层概念） */
.rg-park__zone::before {
  content: '';
  position: absolute;
  inset: -8px;
  border: 3px solid color-mix(in oklch, var(--rg-ink-soft) 65%, transparent);
  border-radius: 4px;
  pointer-events: none;
}

.rg-park__robot {
  position: absolute;
  width: 28%;
  height: 28%;
  background: var(--rg-ink);
  border-radius: 2px;
  border: 2px solid var(--rg-cream);
}

.rg-park__robot--inside { top: 36%; left: 36%; }
.rg-park__robot--half { top: 36%; left: 58%; }
.rg-park__robot--touch { top: 36%; left: 78%; }
.rg-park__robot--far { top: 6%; left: 6%; }

.rg-park__check {
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 0.4rem;
}

.rg-park__case--ok .rg-park__check { color: var(--rg-red); }
.rg-park__case--no .rg-park__check { color: var(--rg-ink-faint); }

.rg-park__case--no .rg-park__diagram {
  opacity: 0.6;
}

.rg-park__case p {
  font-size: 0.92rem;
  color: var(--rg-ink-soft);
}

.rg-park__criteria {
  margin-top: 3rem;
  padding: 2rem;
  background: var(--rg-paper);
  border: 1px solid var(--rg-line);
}

.rg-park__criteria h3 {
  font-family: var(--rg-display);
  font-weight: 900;
  font-size: var(--rg-h3);
  margin-bottom: 1.2rem;
}

.rg-park__criteria ol {
  list-style: none;
  counter-reset: park-criteria;
}

.rg-park__criteria li {
  counter-increment: park-criteria;
  padding: 0.7rem 0;
  padding-left: 2.4rem;
  position: relative;
  border-bottom: 1px solid var(--rg-line-soft);
  font-size: 1.02rem;
  line-height: 1.5;
}

.rg-park__criteria li::before {
  content: counter(park-criteria);
  position: absolute;
  left: 0;
  top: 0.7rem;
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  color: var(--rg-red);
  font-size: 1.4rem;
  line-height: 1.1;
}

.rg-park__criteria li:last-child { border-bottom: none; }

/* 一句话规则卡片 */
.rg-park__rule {
  margin: clamp(2rem, 6vh, 4rem) 0 3rem;
  padding: clamp(2rem, 5vw, 3.5rem);
  background: var(--rg-paper);
  border: 2px solid var(--rg-ink);
  border-radius: 4px;
  text-align: center;
  position: relative;
}

.rg-park__rule::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  bottom: -2px;
  width: 8px;
  background: var(--rg-red);
}

.rg-park__rule-line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 3vw, 2rem);
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.rg-park__chip {
  font-family: var(--rg-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  line-height: 1.2;
  color: var(--rg-ink);
  padding: 0.5rem 1.2rem;
  background: var(--rg-cream);
  border: 2px solid var(--rg-ink);
  border-radius: 2px;
  display: inline-block;
}

.rg-park__chip--a {
  border-color: var(--rg-blue);
  color: var(--rg-blue);
}

.rg-park__chip--b {
  border-color: var(--rg-red);
  color: var(--rg-red);
}

.rg-park__or {
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  color: var(--rg-mustard);
}

.rg-park__or em {
  font-style: italic;
}

.rg-park__rule-eq {
  font-family: var(--rg-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.1;
  color: var(--rg-ink);
  margin: 1rem 0 0.6rem;
}

.rg-park__rule-eq strong {
  color: var(--rg-red);
  font-family: var(--rg-display);
}

.rg-park__rule-note {
  font-family: var(--rg-serif);
  font-style: italic;
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  color: var(--rg-ink-soft);
  margin-top: 0.4rem;
}

.rg-park__rule-note strong {
  color: var(--rg-red);
  font-style: italic;
}

/* ━━━━━━━━ 页 7 自动赛 ━━━━━━━━ */
.rg-timeline {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0 3rem;
  flex-wrap: wrap;
}

.rg-timeline__phase {
  padding: 1.2rem 1.6rem;
  background: var(--rg-paper);
  border: 2px solid var(--rg-ink);
  border-radius: 2px;
  min-width: 140px;
  text-align: center;
}

.rg-timeline__phase--auto { border-color: var(--rg-red); }
.rg-timeline__phase--driver { border-color: var(--rg-blue); }
.rg-timeline__phase--scoring { background: var(--rg-ink); color: var(--rg-cream); }

.rg-timeline__num {
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1;
  margin-bottom: 0.3rem;
}

.rg-timeline__label {
  font-size: 0.9rem;
  color: var(--rg-ink-soft);
}

.rg-timeline__phase--scoring .rg-timeline__label {
  color: color-mix(in oklch, var(--rg-cream) 80%, transparent);
}

.rg-timeline__sep {
  font-family: var(--rg-serif);
  font-style: italic;
  font-size: 1.8rem;
  color: var(--rg-ink-faint);
}

.rg-auto__split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--rg-ink);
  border: 2px solid var(--rg-ink);
  margin-top: 1rem;
}

@media (max-width: 768px) {
  .rg-auto__split { grid-template-columns: 1fr; }
}

.rg-auto__col {
  padding: 2rem;
  background: var(--rg-paper);
}

.rg-auto__col--awp {
  background: oklch(95% 0.06 80);
}

.rg-auto__col h3 {
  font-family: var(--rg-display);
  font-weight: 900;
  font-size: var(--rg-h3);
  margin-bottom: 1rem;
}

.rg-auto__intro {
  color: var(--rg-ink-soft);
  margin-bottom: 1.2rem;
  font-size: 0.98rem;
}

.rg-auto__table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.rg-auto__table td {
  padding: 0.7rem 0.5rem;
  border-bottom: 1px solid var(--rg-line);
  font-size: 0.95rem;
}

.rg-auto__table td em {
  color: var(--rg-red);
  margin: 0 0.1em;
}

.rg-auto__table .rg-yes {
  color: var(--rg-red);
  font-weight: 700;
  text-align: right;
}

.rg-auto__table .rg-no {
  color: var(--rg-ink-faint);
  font-weight: 700;
  text-align: right;
}

.rg-auto__bonus {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 2px solid var(--rg-ink);
  font-size: 1rem;
}

.rg-auto__bonus em {
  font-size: 1.5em;
  color: var(--rg-red);
  margin: 0 0.1em;
}

.rg-auto__bonus span {
  font-size: 0.85rem;
  color: var(--rg-ink-faint);
}

.rg-auto__awp {
  list-style: none;
  counter-reset: awp;
  margin-top: 0.8rem;
}

.rg-auto__awp li {
  counter-increment: awp;
  position: relative;
  padding: 1rem 0 1rem 3rem;
  border-bottom: 1px solid var(--rg-line);
  font-size: 1.05rem;
}

.rg-auto__awp li:last-child { border-bottom: none; }

.rg-auto__awp li::before {
  content: counter(awp);
  position: absolute;
  left: 0;
  top: 0.8rem;
  width: 2.2rem;
  height: 2.2rem;
  background: var(--rg-ink);
  color: var(--rg-mustard);
  font-family: var(--rg-serif);
  font-style: italic;
  font-weight: 900;
  font-size: 1.2rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
}

.rg-end {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rg-line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.rg-end__note {
  font-size: 0.85rem;
  color: var(--rg-ink-faint);
}

.rg-end__note a {
  color: var(--rg-ink-soft);
  font-family: var(--rg-serif);
  font-style: italic;
}

.rg-end__credit {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--rg-serif);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--rg-ink-faint);
}

.rg-end__credit img { opacity: 0.7; }

/* ━━━━━━━━ 翻页悬浮按钮 ━━━━━━━━ */
.rg-floatnav {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vh, 2rem);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  z-index: 50;
}

.rg-floatnav__btn {
  width: 44px;
  height: 44px;
  border: 1.5px solid var(--rg-ink);
  background: var(--rg-cream);
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  color: var(--rg-ink);
  transition: all 200ms cubic-bezier(0.22, 1, 0.36, 1);
  display: grid;
  place-items: center;
  font-family: var(--rg-sans);
}

.rg-floatnav__btn:hover {
  background: var(--rg-ink);
  color: var(--rg-cream);
  transform: translateY(-2px);
}

.rg-floatnav__btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ━━━━━━━━ 入场动画 ━━━━━━━━ */
.rg-page :is(h1, h2, h3, p, .rg-eyebrow, .rg-cover__eyebrow, .rg-cover__title, .rg-cover__sub, .rg-cover__footnote, .rg-cover__scroll, .rg-field__list li, .rg-field__image, .rg-scoring__item, .rg-bridge, .rg-distribution, .rg-versus, .rg-rules li, .rg-park__case, .rg-park__criteria, .rg-timeline, .rg-auto__split, .rg-end, .rg-example) {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1), transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

.rg-page.is-active :is(h1, h2, h3, p, .rg-eyebrow, .rg-cover__eyebrow, .rg-cover__title, .rg-cover__sub, .rg-cover__footnote, .rg-cover__scroll, .rg-field__list li, .rg-field__image, .rg-scoring__item, .rg-bridge, .rg-distribution, .rg-versus, .rg-rules li, .rg-park__case, .rg-park__criteria, .rg-timeline, .rg-auto__split, .rg-end, .rg-example) {
  opacity: 1;
  transform: translateY(0);
}

.rg-page.is-active .rg-eyebrow, .rg-page.is-active .rg-cover__eyebrow { transition-delay: 100ms; }
.rg-page.is-active h1, .rg-page.is-active h2, .rg-page.is-active .rg-cover__title { transition-delay: 200ms; }
.rg-page.is-active .rg-cover__sub, .rg-page.is-active .rg-lead { transition-delay: 350ms; }
.rg-page.is-active .rg-cover__footnote, .rg-page.is-active .rg-cover__scroll, .rg-page.is-active .rg-field__split, .rg-page.is-active .rg-blocks__layout, .rg-page.is-active .rg-scoring__grid, .rg-page.is-active .rg-versus, .rg-page.is-active .rg-rules, .rg-page.is-active .rg-park__cases, .rg-page.is-active .rg-timeline, .rg-page.is-active .rg-auto__split { transition-delay: 500ms; }

.rg-page.is-active .rg-field__list li:nth-child(1) { transition-delay: 500ms; }
.rg-page.is-active .rg-field__list li:nth-child(2) { transition-delay: 600ms; }
.rg-page.is-active .rg-field__list li:nth-child(3) { transition-delay: 700ms; }
.rg-page.is-active .rg-field__list li:nth-child(4) { transition-delay: 800ms; }

.rg-page.is-active .rg-scoring__item:nth-child(1) { transition-delay: 500ms; }
.rg-page.is-active .rg-scoring__item:nth-child(2) { transition-delay: 580ms; }
.rg-page.is-active .rg-scoring__item:nth-child(3) { transition-delay: 660ms; }
.rg-page.is-active .rg-scoring__item:nth-child(4) { transition-delay: 740ms; }
.rg-page.is-active .rg-scoring__item:nth-child(5) { transition-delay: 820ms; }
.rg-page.is-active .rg-scoring__item:nth-child(6) { transition-delay: 900ms; }

.rg-page.is-active .rg-park__case:nth-child(1) { transition-delay: 500ms; }
.rg-page.is-active .rg-park__case:nth-child(2) { transition-delay: 600ms; }
.rg-page.is-active .rg-park__case:nth-child(3) { transition-delay: 700ms; }
.rg-page.is-active .rg-park__case:nth-child(4) { transition-delay: 800ms; }

@media (prefers-reduced-motion: reduce) {
  .rg-page :is(h1, h2, h3, p, .rg-eyebrow, *) {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .rg-cover__arrow { animation: none; }
}

/* ━━━━━━━━ 打印 / PDF 输出 ━━━━━━━━ */
@media print {
  @page {
    size: A4 landscape;
    margin: 0;
  }

  html, body {
    height: auto !important;
    overflow: visible !important;
    scroll-snap-type: none !important;
    background: var(--rg-cream) !important;
  }

  .rg-nav, .rg-floatnav {
    display: none !important;
  }

  .rg-page {
    min-height: 0 !important;
    height: 210mm;
    width: 297mm;
    page-break-after: always;
    page-break-inside: avoid;
    scroll-snap-align: none !important;
    box-sizing: border-box;
    padding: 16mm 20mm !important;
    overflow: hidden;
    position: relative;
  }

  .rg-page:last-child {
    page-break-after: auto;
  }

  /* 入场动画在 PDF 里强制显示 */
  .rg-page :is(*) {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    animation: none !important;
  }

  /* 封面 PDF 调整：去掉浮动动画 */
  .rg-cover__logo {
    animation: none !important;
  }

  /* 字体在 PDF 里稍微缩小一些适配 A4 */
  :root {
    --rg-pagenum: 16rem;
    --rg-h1: 5rem;
    --rg-h2: 3rem;
    --rg-h3: 1.4rem;
  }
}

/* ━━━━━━━━ 响应式 ━━━━━━━━ */
@media (max-width: 768px) {
  .rg-nav { gap: 0.8rem; }
  .rg-logo__text { font-size: 0.9rem; }
  .rg-progress { margin: 0 0.4rem; }
  .rg-field__split { grid-template-columns: 1fr; }
  .rg-floatnav { right: 1rem; bottom: 1rem; }
  .rg-floatnav__btn { width: 40px; height: 40px; }
  .rg-bridge__track { padding: 1rem; gap: 0.5rem; }
  .rg-cube { width: 18px; height: 18px; }
}

@media (max-width: 480px) {
  .rg-bridge__track {
    grid-template-columns: 1fr;
  }
  .rg-bridge__white-line {
    width: 60px;
    height: 2px;
    margin: 0.5rem auto;
  }
}