/* ==========================================================================
   青云梯 折纸城市品牌官网 · 样式表
   色彩体系：#FBF8F4 / #D4E1EC / #F2D0C6 / #F3E8BF / #E0D8E9 / #49515B
   ========================================================================== */

:root {
  --bg-paper: #FBF8F4;
  --paper-white: #FFFFFF;
  --paper-warm: #F5F0E8;
  --blue-gray: #D4E1EC;
  --blue-gray-deep: #B9CDDF;
  --coral: #F2D0C6;
  --coral-deep: #E5B7AA;
  --cream: #F3E8BF;
  --cream-deep: #E5D49B;
  --lavender: #E0D8E9;
  --lavender-deep: #CBBFD9;
  --ink: #49515B;
  --ink-strong: #2E343C;
  --ink-muted: #6C7580;
  --crease: rgba(73, 81, 91, 0.16);
  --crease-strong: rgba(73, 81, 91, 0.28);
  --shadow-paper: 0 6px 18px -6px rgba(73, 81, 91, 0.12), 0 2px 4px -1px rgba(73, 81, 91, 0.05);
  --shadow-paper-lg: 0 12px 28px -8px rgba(73, 81, 91, 0.14), 0 4px 10px -2px rgba(73, 81, 91, 0.06);
  --font-heading: Futura, "Microsoft YaHei", sans-serif;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max-width: 1220px;
  --transition: 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.72;
  overflow-x: clip;
  background-image:
    linear-gradient(135deg, rgba(73, 81, 91, 0.025) 25%, transparent 25%),
    linear-gradient(225deg, rgba(73, 81, 91, 0.02) 25%, transparent 25%);
  background-size: 64px 64px;
}

h1, h2, h3, h4, .font-heading {
  font-family: var(--font-heading);
  color: var(--ink-strong);
  line-height: 1.24;
  margin-top: 0;
  letter-spacing: -0.01em;
}

a {
  color: var(--ink-strong);
  text-decoration-color: rgba(73, 81, 91, 0.35);
  text-underline-offset: 4px;
  transition: color var(--transition), text-decoration-color var(--transition);
}

a:hover {
  color: #1F242A;
  text-decoration-color: var(--ink-strong);
}

button {
  font-family: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--ink-strong);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }
}

/* ---------- 折纸基础容器：斜切边、细折痕、低层纸张阴影 ---------- */
.paper-drop {
  filter: drop-shadow(0 5px 12px rgba(73, 81, 91, 0.1));
}

.origami-sheet {
  position: relative;
  background: var(--paper-white);
  border: 1px solid var(--crease);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
  padding: 28px;
}

.origami-sheet::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 22px;
  height: 22px;
  background: linear-gradient(225deg, var(--bg-paper) 49%, rgba(73, 81, 91, 0.16) 50%, rgba(255, 255, 255, 0.9) 52%);
  border-left: 1px solid var(--crease);
  border-bottom: 1px solid var(--crease);
  pointer-events: none;
}

.origami-sheet--blue { background: linear-gradient(160deg, var(--blue-gray) 0%, #EEF4F9 100%); }
.origami-sheet--coral { background: linear-gradient(160deg, var(--coral) 0%, #FAEEEA 100%); }
.origami-sheet--cream { background: linear-gradient(160deg, var(--cream) 0%, #FAF5E4 100%); }
.origami-sheet--lavender { background: linear-gradient(160deg, var(--lavender) 0%, #F4F0F8 100%); }

.crease-divider {
  border: 0;
  height: 1px;
  margin: 0;
  background: repeating-linear-gradient(
    90deg,
    var(--crease-strong) 0,
    var(--crease-strong) 8px,
    transparent 8px,
    transparent 14px
  );
}

.section-block {
  padding: 76px 0;
  position: relative;
}

@media (max-width: 768px) {
  .section-block {
    padding: 52px 0;
  }
}

.section-header {
  margin-bottom: 40px;
  max-width: 720px;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--cream);
  padding: 5px 14px 5px 12px;
  border: 1px solid var(--crease);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  margin-bottom: 14px;
}

.section-kicker--blue { background: var(--blue-gray); }
.section-kicker--coral { background: var(--coral); }
.section-kicker--lavender { background: var(--lavender); }

.section-title {
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  margin-bottom: 12px;
}

.section-lead {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1rem;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--ink-strong);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: transform var(--transition), background-color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--ink-strong);
  color: var(--bg-paper);
}

.btn-primary:hover {
  background: #1B2026;
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-coral {
  background: var(--coral);
  color: var(--ink-strong);
  border-color: var(--crease-strong);
}

.btn-coral:hover {
  background: var(--coral-deep);
  transform: translateY(-2px);
}

.btn-blue {
  background: var(--blue-gray);
  color: var(--ink-strong);
  border-color: var(--crease-strong);
}

.btn-blue:hover {
  background: var(--blue-gray-deep);
  transform: translateY(-2px);
}

.btn-outline {
  background: var(--paper-white);
  color: var(--ink-strong);
  border-color: var(--crease-strong);
}

.btn-outline:hover {
  background: var(--paper-warm);
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.48;
  cursor: not-allowed;
  transform: none;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.86rem;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(251, 248, 244, 0.93);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--crease);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink-strong);
  letter-spacing: 0.03em;
}

.brand-mark svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.brand-sub {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--ink-muted);
  letter-spacing: 0.08em;
  border-left: 1px solid var(--crease-strong);
  padding-left: 10px;
}

@media (max-width: 480px) {
  .brand-sub {
    display: none;
  }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.92rem;
  text-decoration: none;
  color: var(--ink);
  padding: 6px 2px;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--ink-strong);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.menu-toggle {
  display: none;
  background: var(--paper-white);
  border: 1px solid var(--crease-strong);
  padding: 8px 12px;
  color: var(--ink-strong);
  font-size: 0.9rem;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-paper);
    border-bottom: 1px solid var(--crease-strong);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px 22px;
    gap: 12px;
    box-shadow: var(--shadow-paper-lg);
  }
  .nav-links.is-open {
    display: flex;
  }
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
}

@media (max-width: 500px) {
  .header-cta {
    display: none;
  }
}

/* ---------- 首屏：上方超大标题 + 下方左宽右窄 ---------- */
.hero-section {
  padding: 42px 0 64px;
  position: relative;
}

.hero-top-title-wrap {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px dashed var(--crease-strong);
  position: relative;
}

.hero-eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  font-size: 0.84rem;
  color: var(--ink-muted);
  margin-bottom: 14px;
}

.hero-eyebrow-tag {
  background: var(--blue-gray);
  color: var(--ink-strong);
  padding: 3px 10px;
  font-family: var(--font-heading);
  font-weight: 600;
  border: 1px solid var(--crease);
}

.hero-display-title {
  font-family: var(--font-heading);
  font-size: clamp(2.05rem, 4.9vw, 3.85rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  max-width: 24ch;
}

.hero-display-title .highlight-fold {
  display: inline-block;
  background: linear-gradient(180deg, transparent 58%, var(--cream) 58%);
  padding: 0 4px;
}

.hero-subtitle-line {
  margin: 0;
  font-size: 1.04rem;
  color: var(--ink-muted);
  max-width: 68ch;
}

.hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.92fr);
  gap: 32px;
  align-items: stretch;
}

@media (max-width: 960px) {
  .hero-split {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* 左侧宽区：等距折纸城市舞台 */
.hero-city-stage {
  position: relative;
  background: linear-gradient(180deg, #FBF8F4 0%, #F4EFE7 100%);
  border: 1px solid var(--crease);
  padding: 20px;
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-city-stage::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 28px;
  background: linear-gradient(225deg, var(--bg-paper) 49%, var(--crease) 50%, var(--blue-gray) 53%);
  border-left: 1px solid var(--crease);
  border-bottom: 1px solid var(--crease);
  pointer-events: none;
}

.city-svg-frame {
  width: 100%;
  display: block;
}

.city-svg-frame svg {
  width: 100%;
  height: auto;
  display: block;
}

.crane-float {
  animation: craneGlide 4.8s ease-in-out infinite;
  transform-origin: center;
}

@keyframes craneGlide {
  0%, 100% { transform: translateY(0px) translateX(0px); }
  50% { transform: translateY(-7px) translateX(4px); }
}

@media (prefers-reduced-motion: reduce) {
  .crane-float { animation: none; }
}

.city-legend-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--crease);
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.city-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.swatch {
  width: 12px;
  height: 12px;
  border: 1px solid var(--crease-strong);
  display: inline-block;
  transform: rotate(45deg) scale(0.82);
}

/* 右侧窄区：竖向产品说明与 CTA */
.hero-vertical-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--paper-white);
  border: 1px solid var(--crease);
  padding: 28px 26px;
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
  position: relative;
}

.hero-vertical-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 24px;
  height: 5px;
  background: linear-gradient(90deg, var(--blue-gray) 0%, var(--coral) 50%, var(--lavender) 100%);
}

.hero-vertical-panel::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 24px;
  height: 24px;
  background: linear-gradient(225deg, var(--bg-paper) 49%, var(--crease) 50%, var(--coral) 53%);
  border-left: 1px solid var(--crease);
  border-bottom: 1px solid var(--crease);
}

.vertical-label {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ink-muted);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.hero-vertical-title {
  font-size: 1.38rem;
  margin-bottom: 12px;
}

.hero-vertical-list {
  list-style: none;
  margin: 18px 0 22px;
  padding: 0;
  border-top: 1px solid var(--crease);
}

.hero-vertical-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--crease);
  font-size: 0.9rem;
}

.hero-vertical-list span.label {
  color: var(--ink-muted);
}

.hero-vertical-list strong.val {
  color: var(--ink-strong);
  font-weight: 600;
  text-align: right;
}

.hero-vertical-cta-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

.hero-vertical-cta-group .btn {
  width: 100%;
}

.cta-disclosure {
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin: 10px 0 0;
  line-height: 1.5;
}

/* ---------- 第二屏：折纸城市迷宫 ---------- */
.maze-section {
  padding: 68px 0 82px;
  background: linear-gradient(180deg, rgba(212, 225, 236, 0.24) 0%, rgba(251, 248, 244, 0.95) 28%, rgba(224, 216, 233, 0.2) 100%);
  border-top: 1px solid var(--crease);
  border-bottom: 1px solid var(--crease);
}

.maze-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 24px;
}

.maze-start-cta-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.maze-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.85fr);
  gap: 24px;
  align-items: start;
}

@media (max-width: 960px) {
  .maze-workspace {
    grid-template-columns: 1fr;
  }
}

.maze-stage {
  background: var(--paper-white);
  border: 1px solid var(--crease-strong);
  padding: 20px;
  position: relative;
  box-shadow: var(--shadow-paper);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.maze-stage.is-focused {
  border-color: var(--ink-strong);
  box-shadow: 0 0 0 3px rgba(73, 81, 91, 0.14), var(--shadow-paper-lg);
}

@media (max-width: 520px) {
  .maze-stage {
    padding: 12px;
  }
}

.maze-focus-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--crease);
  font-size: 0.84rem;
}

.focus-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  background: var(--paper-warm);
  border: 1px solid var(--crease);
  color: var(--ink-muted);
  font-weight: 500;
}

.focus-pill.is-active {
  background: var(--cream);
  color: var(--ink-strong);
  border-color: var(--ink-strong);
}

.focus-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-muted);
}

.focus-pill.is-active .focus-dot {
  background: #3B7A57;
}

.level-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
}

.level-tab {
  border: 1px solid var(--crease-strong);
  background: var(--bg-paper);
  color: var(--ink);
  padding: 5px 11px;
  font-size: 0.82rem;
  font-family: var(--font-heading);
  font-weight: 600;
  transition: background-color var(--transition), color var(--transition);
}

.level-tab.is-current {
  background: var(--ink-strong);
  color: #FFFFFF;
  border-color: var(--ink-strong);
}

.level-tab.is-cleared::after {
  content: " ✓";
}

/* 迷宫二维网格 */
.maze-grid-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 8px;
  background: var(--bg-paper);
  border: 1px solid var(--crease);
}

@media (max-width: 520px) {
  .maze-grid-wrapper {
    padding: 4px;
  }
}

.maze-grid {
  --maze-cols: 11;
  display: grid;
  grid-template-columns: repeat(var(--maze-cols), minmax(0, 1fr));
  gap: 2px;
  width: 100%;
  max-width: calc(var(--maze-cols) * 44px);
  user-select: none;
  touch-action: manipulation;
}

.maze-cell {
  aspect-ratio: 1 / 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--paper-white);
  border: 1px solid rgba(73, 81, 91, 0.08);
  font-size: 0.72rem;
  font-weight: 700;
  overflow: hidden;
  transition: background-color 0.16s ease, transform 0.14s ease;
}

/* 折纸墙体 */
.maze-cell.is-wall {
  background: linear-gradient(135deg, var(--blue-gray) 0%, #BFCFDE 50%, #C6D5E3 51%, #DFE8F0 100%);
  border-color: rgba(73, 81, 91, 0.24);
  box-shadow: inset 0 -2px 0 rgba(73, 81, 91, 0.12);
}

.maze-cell.is-wall::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, transparent 48%, rgba(73, 81, 91, 0.11) 49%, rgba(73, 81, 91, 0.11) 51%, transparent 52%);
  pointer-events: none;
}

/* 入口与出口 */
.maze-cell.is-start {
  background: #F4F7FA;
  border-color: var(--blue-gray-deep);
}

.maze-cell.is-exit {
  background: var(--cream);
  border: 1px dashed var(--ink-strong);
}

.maze-cell.is-exit.is-locked-exit {
  background: #F8F2DE;
  opacity: 0.85;
}

.cell-badge {
  font-size: clamp(8px, 2.2vw, 10px);
  line-height: 1;
  white-space: nowrap;
  color: var(--ink-muted);
  pointer-events: none;
}

/* 钥匙与门 */
.maze-cell.has-key-a { background: #E9F1F7; }
.maze-cell.has-key-b { background: #FBECE8; }

.maze-cell.is-door-a {
  background: var(--blue-gray);
  border: 2px solid #5D7B96;
}

.maze-cell.is-door-b {
  background: var(--coral);
  border: 2px solid #A76B5C;
}

.maze-cell.is-door-open {
  background: var(--paper-warm);
  border: 1px dashed rgba(73, 81, 91, 0.28);
}

.maze-icon {
  width: 72%;
  height: 72%;
  display: block;
  pointer-events: none;
}

/* 纸鹤玩家 */
.maze-crane {
  position: absolute;
  inset: 10%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 4;
  transition: transform 0.14s ease;
  filter: drop-shadow(0 2px 3px rgba(73, 81, 91, 0.25));
}

.maze-crane svg {
  width: 100%;
  height: 100%;
}

/* 单步提示高亮 */
.maze-cell.is-hint {
  box-shadow: inset 0 0 0 3px #C6785D;
  background: #FFF6E3;
  animation: hintPulse 1.1s ease-in-out infinite;
}

@keyframes hintPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(0.94); }
}

.maze-cell.is-bump {
  animation: wallBump 0.2s ease;
}

@keyframes wallBump {
  0%, 100% { background-color: #DFE8F0; }
  50% { background-color: var(--coral); }
}

/* 开屏引导条 & 胜利浮层 */
.maze-inline-notice {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--paper-warm);
  border-left: 3px solid var(--ink-strong);
  font-size: 0.88rem;
  color: var(--ink);
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.maze-victory-banner {
  margin-top: 14px;
  padding: 16px 18px;
  background: linear-gradient(135deg, var(--cream) 0%, #FFFDF8 100%);
  border: 1px solid var(--ink-strong);
  display: none;
}

.maze-victory-banner.is-visible {
  display: block;
}

.maze-victory-banner h3 {
  font-size: 1.12rem;
  margin-bottom: 6px;
}

.maze-victory-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

/* 右侧控制面板 & 状态 HUD */
.maze-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.maze-hud-card {
  background: var(--paper-white);
  border: 1px solid var(--crease);
  padding: 20px;
  box-shadow: var(--shadow-paper);
}

.hud-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.hud-stat {
  background: var(--bg-paper);
  border: 1px solid var(--crease);
  padding: 10px 12px;
}

.hud-stat-label {
  font-size: 0.76rem;
  color: var(--ink-muted);
  display: block;
  margin-bottom: 3px;
}

.hud-stat-value {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink-strong);
}

.key-status-box {
  padding: 11px 12px;
  background: var(--bg-paper);
  border: 1px solid var(--crease);
  margin-bottom: 16px;
}

.key-status-title {
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-bottom: 7px;
  display: block;
}

.key-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.key-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 0.82rem;
  border: 1px solid var(--crease-strong);
  background: var(--paper-white);
  color: var(--ink-muted);
}

.key-pill.is-collected {
  color: var(--ink-strong);
  font-weight: 600;
  background: var(--cream);
  border-color: var(--ink-strong);
}

.maze-controls-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 9px;
  margin-bottom: 14px;
}

.relaxed-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  background: var(--lavender);
  background: linear-gradient(90deg, rgba(224, 216, 233, 0.55) 0%, rgba(212, 225, 236, 0.38) 100%);
  border: 1px solid var(--crease);
  font-size: 0.86rem;
  cursor: pointer;
}

.relaxed-toggle input {
  width: 18px;
  height: 18px;
  accent-color: var(--ink-strong);
  cursor: pointer;
}

/* 移动端/触屏四方向控制器 */
.dpad-card {
  background: var(--paper-white);
  border: 1px solid var(--crease);
  padding: 16px;
  box-shadow: var(--shadow-paper);
  text-align: center;
}

.dpad-title {
  font-size: 0.82rem;
  color: var(--ink-muted);
  margin: 0 0 10px;
}

.dpad-grid {
  display: grid;
  grid-template-columns: repeat(3, 56px);
  grid-template-rows: repeat(2, 50px);
  gap: 8px;
  justify-content: center;
}

.dpad-btn {
  background: var(--bg-paper);
  border: 1px solid var(--crease-strong);
  color: var(--ink-strong);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.08rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: background-color 0.12s ease, transform 0.1s ease;
  touch-action: manipulation;
}

.dpad-btn span.sub {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--ink-muted);
  margin-top: 2px;
}

.dpad-btn:active {
  background: var(--blue-gray);
  transform: scale(0.95);
}

.dpad-up { grid-column: 2; grid-row: 1; }
.dpad-left { grid-column: 1; grid-row: 2; }
.dpad-down { grid-column: 2; grid-row: 2; }
.dpad-right { grid-column: 3; grid-row: 2; }

/* 规则面板 */
.maze-rules-panel {
  display: none;
  margin-top: 14px;
  padding: 16px 18px;
  background: var(--paper-white);
  border: 1px solid var(--crease-strong);
  font-size: 0.9rem;
}

.maze-rules-panel.is-open {
  display: block;
}

.maze-rules-panel h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.maze-rules-panel ul {
  margin: 0;
  padding-left: 18px;
}

.maze-rules-panel li {
  margin-bottom: 5px;
}

/* ---------- 优势：左右交错阶梯版式 ---------- */
.staircase-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
  position: relative;
}

.staircase-list::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 24px;
  bottom: 24px;
  width: 1px;
  border-left: 1px dashed var(--crease-strong);
  pointer-events: none;
}

@media (max-width: 768px) {
  .staircase-list::before {
    display: none;
  }
}

.stair-step {
  width: 64%;
  position: relative;
}

.stair-step:nth-child(odd) {
  align-self: flex-start;
}

.stair-step:nth-child(even) {
  align-self: flex-end;
}

@media (max-width: 768px) {
  .stair-step {
    width: 100%;
  }
}

.stair-num {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ink-muted);
  margin-bottom: 8px;
  display: block;
}

.stair-meta {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed var(--crease);
  font-size: 0.86rem;
  color: var(--ink-muted);
}

/* ---------- 节点地区：城市分区索引 ---------- */
.district-index {
  border-top: 2px solid var(--ink-strong);
  background: var(--paper-white);
  box-shadow: var(--shadow-paper);
}

.district-row {
  display: grid;
  grid-template-columns: 110px 1.1fr 1.2fr 0.9fr;
  gap: 20px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--crease);
  align-items: center;
}

.district-row--head {
  background: var(--paper-warm);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  padding: 13px 24px;
}

.district-code {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 5px 10px;
  border: 1px solid var(--crease);
  background: var(--blue-gray);
}

.district-row:nth-child(3) .district-code { background: var(--coral); }
.district-row:nth-child(4) .district-code { background: var(--cream); }
.district-row:nth-child(5) .district-code { background: var(--lavender); }

.status-pending {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.84rem;
  padding: 4px 10px;
  background: var(--bg-paper);
  border: 1px dashed var(--crease-strong);
  color: var(--ink-muted);
}

@media (max-width: 860px) {
  .district-row--head {
    display: none;
  }
  .district-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 18px 16px;
  }
}

/* ---------- AI 与流媒体：四个开放式场景段落（不放统一卡片墙） ---------- */
.open-scenarios {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.scenario-passage {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 24px;
  padding: 24px 0 32px;
  border-bottom: 1px dashed var(--crease-strong);
  align-items: start;
}

.scenario-passage:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.scenario-num {
  font-family: var(--font-heading);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  color: rgba(73, 81, 91, 0.24);
  border-right: 1px solid var(--crease);
  padding-right: 16px;
  text-align: right;
}

.scenario-content h3 {
  font-size: 1.32rem;
  margin-bottom: 10px;
}

.scenario-content p {
  margin: 0 0 10px;
  max-width: 72ch;
}

.scenario-footnote {
  font-size: 0.86rem;
  color: var(--ink-muted);
}

@media (max-width: 600px) {
  .scenario-passage {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .scenario-num {
    border-right: 0;
    border-bottom: 1px solid var(--crease);
    padding-right: 0;
    padding-bottom: 6px;
    text-align: left;
    font-size: 1.8rem;
  }
}

/* ---------- 五档套餐：纵向折页式比较面板 ---------- */
.accordion-fold-pamphlet {
  border: 1px solid var(--crease-strong);
  background: var(--paper-white);
  box-shadow: var(--shadow-paper-lg);
}

.fold-tier {
  border-bottom: 1px solid var(--crease-strong);
  position: relative;
}

.fold-tier:last-child {
  border-bottom: 0;
}

.fold-tier-trigger {
  width: 100%;
  background: transparent;
  border: 0;
  padding: 20px 24px;
  display: grid;
  grid-template-columns: 102px 0.95fr 1.6fr auto;
  gap: 16px;
  align-items: center;
  text-align: left;
  color: var(--ink-strong);
  transition: background-color var(--transition);
}

.fold-tier:nth-child(1) .fold-tier-trigger { background: rgba(212, 225, 236, 0.28); }
.fold-tier:nth-child(2) .fold-tier-trigger { background: rgba(243, 232, 191, 0.28); }
.fold-tier:nth-child(3) .fold-tier-trigger { background: rgba(242, 208, 198, 0.28); }
.fold-tier:nth-child(4) .fold-tier-trigger { background: rgba(224, 216, 233, 0.28); }
.fold-tier:nth-child(5) .fold-tier-trigger { background: rgba(212, 225, 236, 0.2); }

.fold-tier-trigger:hover {
  filter: brightness(0.98);
}

.fold-badge {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  background: var(--paper-white);
  border: 1px solid var(--crease-strong);
  text-align: center;
}

.fold-tier-name {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
}

.fold-tier-brief {
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.fold-indicator {
  font-family: var(--font-heading);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink-strong);
  padding: 4px 10px;
  border: 1px solid var(--crease);
  background: var(--paper-white);
}

.fold-tier-body {
  padding: 0 24px 22px;
  border-top: 1px dashed var(--crease);
  background: var(--bg-paper);
}

.fold-tier-body[hidden] {
  display: none;
}

.fold-specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 16px;
}

@media (max-width: 860px) {
  .fold-tier-trigger {
    grid-template-columns: 1fr auto;
    gap: 8px;
    padding: 16px;
  }
  .fold-badge {
    grid-column: 1;
    justify-self: start;
  }
  .fold-tier-name {
    grid-column: 1;
  }
  .fold-tier-brief {
    grid-column: 1 / -1;
  }
  .fold-indicator {
    grid-column: 2;
    grid-row: 1 / 3;
  }
  .fold-specs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .fold-specs-grid {
    grid-template-columns: 1fr;
  }
}

.fold-spec-item {
  background: var(--paper-white);
  border: 1px solid var(--crease);
  padding: 12px 14px;
}

.fold-spec-item span {
  display: block;
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-bottom: 4px;
}

.fold-spec-item strong {
  font-family: var(--font-heading);
  font-size: 0.96rem;
  color: var(--ink-strong);
}

.plans-cta-bar {
  margin-top: 22px;
  padding: 18px 22px;
  background: var(--cream);
  border: 1px solid var(--crease-strong);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* ---------- 九篇文章：城市导览目录（左侧分类，右侧文章） ---------- */
.city-directory {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 28px;
  align-items: start;
}

@media (max-width: 860px) {
  .city-directory {
    grid-template-columns: 1fr;
    gap: 18px;
  }
}

.directory-cats {
  background: var(--paper-white);
  border: 1px solid var(--crease);
  padding: 16px;
  box-shadow: var(--shadow-paper);
  position: sticky;
  top: 86px;
}

@media (max-width: 860px) {
  .directory-cats {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px;
  }
}

.cat-filter-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  padding: 10px 12px;
  margin-bottom: 4px;
  font-size: 0.92rem;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background-color var(--transition), border-color var(--transition);
}

.cat-filter-btn:hover {
  background: var(--bg-paper);
}

.cat-filter-btn.is-active {
  background: var(--blue-gray);
  border-color: var(--crease-strong);
  color: var(--ink-strong);
  font-weight: 600;
}

@media (max-width: 860px) {
  .cat-filter-btn {
    width: auto;
    margin-bottom: 0;
    padding: 7px 12px;
    border-color: var(--crease);
    gap: 6px;
  }
}

.directory-articles {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.article-dir-item {
  background: var(--paper-white);
  border: 1px solid var(--crease);
  padding: 20px 22px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  transition: transform var(--transition), border-color var(--transition);
}

.article-dir-item:hover {
  transform: translateX(4px);
  border-color: var(--ink-strong);
}

.article-dir-item[hidden] {
  display: none;
}

.article-dir-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--ink-muted);
  margin-bottom: 6px;
}

.article-dir-cat {
  background: var(--lavender);
  color: var(--ink-strong);
  padding: 2px 8px;
  font-weight: 600;
}

.article-dir-title {
  font-size: 1.12rem;
  margin-bottom: 6px;
}

.article-dir-title a {
  text-decoration: none;
}

.article-dir-title a:hover {
  text-decoration: underline;
}

.article-dir-excerpt {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

@media (max-width: 600px) {
  .article-dir-item {
    grid-template-columns: 1fr;
  }
}

/* ---------- 评价板块 ---------- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

@media (max-width: 900px) {
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 520px) {
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

.review-metric-box {
  background: var(--paper-white);
  border: 1px solid var(--crease);
  padding: 20px;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.review-metric-box h3 {
  font-size: 1.02rem;
  margin-bottom: 8px;
}

.review-metric-box p {
  margin: 0 0 12px;
  font-size: 0.88rem;
  color: var(--ink-muted);
}

/* ---------- FAQ：细线展开列表 ---------- */
.faq-hairline-list {
  border-top: 1px solid var(--crease-strong);
}

.faq-item {
  border-bottom: 1px solid var(--crease-strong);
}

.faq-trigger {
  width: 100%;
  background: transparent;
  border: 0;
  padding: 20px 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--ink-strong);
}

.faq-trigger:hover {
  color: #1F242A;
}

.faq-plus {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--crease-strong);
  font-size: 1rem;
  line-height: 1;
  transition: transform var(--transition), background-color var(--transition);
}

.faq-trigger[aria-expanded="true"] .faq-plus {
  background: var(--ink-strong);
  color: #FFFFFF;
}

.faq-panel {
  padding: 0 6px 20px;
  color: var(--ink);
  font-size: 0.95rem;
  max-width: 78ch;
}

.faq-panel[hidden] {
  display: none;
}

/* ---------- 文章页与独立页面排版 ---------- */
.page-hero {
  padding: 44px 0 32px;
  border-bottom: 1px dashed var(--crease-strong);
  background: linear-gradient(180deg, rgba(212, 225, 236, 0.16) 0%, var(--bg-paper) 100%);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.breadcrumb li::after {
  content: "/";
  margin-left: 8px;
  color: var(--crease-strong);
}

.breadcrumb li:last-child::after {
  content: "";
  margin: 0;
}

.breadcrumb a {
  color: var(--ink-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--ink-strong);
  text-decoration: underline;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 36px;
  padding: 44px 0 72px;
  align-items: start;
}

@media (max-width: 960px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
}

.article-prose {
  background: var(--paper-white);
  border: 1px solid var(--crease);
  padding: 36px 40px;
  box-shadow: var(--shadow-paper);
}

@media (max-width: 640px) {
  .article-prose {
    padding: 22px 18px;
  }
}

.article-prose h2 {
  font-size: 1.42rem;
  margin: 28px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--crease);
}

.article-prose h3 {
  font-size: 1.15rem;
  margin: 20px 0 8px;
}

.article-prose p {
  margin: 0 0 16px;
}

.article-prose ul,
.article-prose ol {
  margin: 0 0 18px;
  padding-left: 22px;
}

.article-prose li {
  margin-bottom: 8px;
}

.article-callout {
  background: var(--bg-paper);
  border-left: 3px solid var(--ink-strong);
  padding: 14px 18px;
  margin: 20px 0;
  font-size: 0.94rem;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-card {
  background: var(--paper-white);
  border: 1px solid var(--crease);
  padding: 20px;
  box-shadow: var(--shadow-paper);
}

.sidebar-card h2,
.sidebar-card h3 {
  font-size: 1.05rem;
  margin-bottom: 12px;
}

.related-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.related-list li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--crease);
  font-size: 0.9rem;
}

.related-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding: 44px 0 72px;
}

@media (max-width: 860px) {
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--paper-warm);
  border-top: 1px solid var(--crease-strong);
  padding: 52px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 32px;
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-col h3 {
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.footer-bottom {
  padding-top: 20px;
  border-top: 1px dashed var(--crease-strong);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.84rem;
  color: var(--ink-muted);
}