/* ============================================================
   小游戏大全 · 首页样式 v3（街机印刷海报 · 深色车间版）
   - 无紫/靛/蓝紫渐变，无 Tailwind 色板，无纯平底色
   - 套印错位字、噪点颗粒、网纹半调，全为 CSS/SVG 生成
   - 动效统一用非线性的 print-snap / overshoot 曲线
   ============================================================ */

:root {
  --ink: #15110b;            /* 版黑 */
  --paper: #ece0c8;          /* 纸米 */
  --paper-dim: #a2947c;
  --plate: #201a12;          /* 面板 */
  --plate-2: #2a2217;
  --line: #51432c;           /* 墨线 */
  --line-hi: #6b5a3e;
  --rust: #e96a2e;           /* 补色：铁锈橙 */
  --lemon: #e7c14e;          /* 套印黄 */
  --acid: #a5c95b;           /* 荧光绿（印刷色板替代） */
  --petrol: #3aa8ad;         /* 深青 */
  --blood: #d6453a;          /* 品红替代 */
  --noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='table' tableValues='0 0.35'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.8'/%3E%3C/svg%3E");
  --font-disp: "Times New Roman", "Songti SC", "SimSun", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --motion-snap: cubic-bezier(0.9, 0, 0.1, 1);   /* 印刷吸附：先缓后急 */
  --motion-spring: cubic-bezier(0.3, 1.8, 0.4, 1); /* 回弹过头 */
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }

body {
  background:
    radial-gradient(90% 55% at 8% -4%, rgba(233, 106, 46, 0.16), transparent 60%),
    radial-gradient(70% 40% at 105% 10%, rgba(58, 168, 173, 0.13), transparent 60%),
    linear-gradient(180deg, #1c1610 0%, #171108 55%, #14100a 100%);
  color: var(--paper);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

/* 全页印刷颗粒：噪点 + 横向网点 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image: var(--noise);
  background-size: 160px 160px;
  opacity: 0.5;
  mix-blend-mode: overlay;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(236, 224, 200, 0.012) 3px 4px),
    radial-gradient(circle at 50% 0%, rgba(231, 193, 78, 0.09), transparent 55%);
}

.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;
}
a { color: inherit; text-decoration: none; }
img { vertical-align: middle; }
::selection { background: var(--lemon); color: var(--ink); }

/* ============================================================
   报头
   ============================================================ */
.masthead {
  position: relative;
  z-index: 2;
  max-width: 1240px;
  margin: 0 auto;
  padding: 26px 26px 6px;
  border-bottom: 1px solid var(--line);
}
.masthead::after {
  content: "";
  position: absolute;
  left: 26px; right: 26px; bottom: -4px;
  height: 5px;
  background:
    linear-gradient(90deg, var(--rust) 0 18%, transparent 18% 19%, var(--petrol) 19% 24%, transparent 24% 25%,
      var(--paper) 25% 27%, transparent 27% 100%);
  opacity: 0.55;
}

.mast-line {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px 24px;
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--paper-dim);
}
.mast-line span { text-transform: uppercase; }

.mast-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;                 /* 右侧数字组故意沉底，非居中 */
}

.mast-title {
  margin: 0;
  font-family: var(--font-disp);
  font-size: clamp(46px, 9vw, 108px);
  line-height: 0.92;
  font-weight: 900;
  color: var(--paper);
  letter-spacing: 0.01em;
  /* 套印错位字：两层偏移影 + 一道套印色边 */
  text-shadow:
    2px 2px 0 rgba(233, 106, 46, 0.9),
    -2px 0 0 rgba(58, 168, 173, 0.55);
  position: relative;
  transform: rotate(-1.1deg) translateX(-4px); /* 出头版，故意歪一点 */
}
.mast-title::after {
  content: "";
  position: absolute;
  left: 2%; bottom: -8%;
  width: 96%;
  height: 12px;
  background: repeating-linear-gradient(90deg, var(--blood) 0 10px, transparent 10px 22px);
  opacity: 0.3;
  mix-blend-mode: screen;
}
.mast-sub {
  max-width: 44em;
  margin: 18px 0 0 6px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--paper-dim);
}
.mast-sub strong { color: var(--lemon); font-weight: 800; }

/* 右侧编号块（错位贴纸） */
.press-num {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  min-width: 230px;
  transform: rotate(1.2deg) translateY(8px);
}
.pn {
  border: 1px solid var(--line-hi);
  padding: 8px 12px 10px;
  background: rgba(32, 26, 18, 0.6);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.4);
}
.pn:nth-child(even) { transform: translateY(6px); }
.pn dt { font-size: 11px; color: var(--paper-dim); letter-spacing: 2px; }
.pn dd {
  margin: 2px 0 0;
  font-family: var(--font-disp);
  font-size: 26px;
  font-weight: 900;
  color: var(--lemon);
  font-variant-numeric: tabular-nums;
}

/* ---------- 检索台 ---------- */
.toolrow { margin: 34px 0 22px; display: flex; align-items: flex-start; gap: 18px; flex-wrap: wrap; }
.find {
  display: flex;
  align-items: center;
  gap: 10px;
  width: min(100%, 620px);
  border: 2px solid var(--line-hi);
  background: rgba(236, 224, 200, 0.03);
  padding: 8px 10px;
  position: relative;
  transition: border-color 0.12s var(--motion-snap);
}
.find:focus-within { border-color: var(--lemon); box-shadow: 5px 5px 0 rgba(231, 193, 78, 0.2); }
.find .fi { width: 20px; height: 20px; flex: 0 0 auto; }
.find-tag {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--ink);
  background: var(--rust);
  padding: 4px 7px;
  transform: rotate(-1deg);
  flex: 0 0 auto;
}
.search-input {
  flex: 1 1 auto;
  min-width: 0;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--paper);
  font-size: 15px;
  font-family: var(--font-body);
}
.search-input::placeholder { color: #7d6f57; }
.find-clear {
  border: 0;
  background: transparent;
  padding: 4px;
  cursor: pointer;
  opacity: 0.75;
  line-height: 0;
}
.find-clear:hover { opacity: 1; }
.find-clear img { width: 16px; height: 16px; }
.find-hint { margin: 6px 0 0; font-size: 12px; color: #6f6350; max-width: 24em; }

/* ---------- 分类目录签（打孔票样式） ---------- */
.chapters {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 10px;
  margin: 10px 0 2px 6px;
}
.cat-chip {
  --cat: var(--rust);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px 9px 14px;
  font-size: 13px;
  color: var(--paper);
  border: 1px solid var(--line-hi);
  background:
    repeating-linear-gradient(135deg, rgba(236, 224, 200, 0.03) 0 6px, transparent 6px 12px),
    var(--plate);
  clip-path: polygon(9px 0, calc(100% - 9px) 0, 100% 50%, calc(100% - 9px) 100%, 9px 100%, 0 50%);
  transition: transform 0.14s var(--motion-spring), background 0.14s var(--motion-snap);
  animation: fadeUp 0.3s var(--motion-snap) both;
}
.cat-chip:hover { transform: translateY(-2px) rotate(-0.6deg); }
.cat-chip.on {
  background: var(--cat);
  color: var(--ink);
  border-color: var(--cat);
}
.cat-chip.dim { opacity: 0.4; }
.cat-dot {
  width: 8px; height: 8px;
  background: var(--cat);
  transform: rotate(45deg);
  box-shadow: 0 0 0 1px rgba(236, 224, 200, 0.4);
}
.cat-chip.on .cat-dot { background: var(--ink); box-shadow: none; }
.cat-name { font-weight: 800; letter-spacing: 1px; }
.cat-count {
  font-style: normal;
  font-size: 11px;
  padding: 1px 6px;
  border: 1px dashed currentColor;
  border-radius: 2px;
  opacity: 0.85;
}

/* ============================================================
   版面（左边条 + 右藏品架，非对称）
   ============================================================ */
.sheet {
  position: relative;
  z-index: 2;
  max-width: 1240px;
  margin: 0 auto;
  padding: 10px 26px 30px;
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: 34px;
}

/* 左边条：错位贴纸栏 */
.rail { align-self: start; }
.sticker {
  position: relative;
  border: 1px solid var(--line-hi);
  background:
    var(--noise),
    linear-gradient(160deg, rgba(236, 224, 200, 0.04), transparent 70%),
    var(--plate);
  padding: 16px 16px 14px;
  margin-bottom: 22px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--paper-dim);
}
.sticker::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 50%;
  width: 64px;
  height: 16px;
  transform: translateX(-50%) rotate(1deg);
  background: repeating-linear-gradient(90deg, rgba(236,224,200,0.28) 0 2px, transparent 2px 5px);
  opacity: 0.75;
}
.sticker-a { transform: rotate(-0.7deg); }
.sticker-b { transform: rotate(0.5deg) translateX(10px); }
.sticker-c { transform: rotate(-0.4deg); }
.rail-h {
  margin: 0 0 8px;
  font-family: var(--font-disp);
  font-size: 20px;
  color: var(--lemon);
  letter-spacing: 1px;
}
.sticker p { margin: 4px 0; }
.sticker .note { color: #7d6f57; font-size: 12px; margin-top: 8px; }
.log { margin: 0; padding-left: 18px; }
.log li { margin-bottom: 10px; }
.log li::marker { color: var(--rust); }

/* 右藏品架 */
.shelf { min-width: 0; }
.content { margin-top: 8px; }

/* ---------- 分类区块（错位标题 + 幽灵页码） ---------- */
.category {
  position: relative;
  margin: 0 0 54px;
  padding-left: 2px;
  scroll-margin-top: 54px;   /* 等于分类间 54px 间距：点击跳转后上一个分类底部恰好在菜单顶线上，高亮命中点击的分类 */
  opacity: 1;
  transition: opacity 0.5s var(--motion-snap), transform 0.5s var(--motion-snap);
}
.category.reveal { opacity: 0; transform: translateY(26px); }
.category.reveal-shown { opacity: 1; transform: none; }

.category-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 22px;
  position: relative;
}
.content .category:nth-child(even) .category-head { margin-left: 9%; }
.content .category:nth-child(odd)  .category-head { margin-left: 2%; }

.category-flag {
  width: 14px;
  height: 14px;
  background: var(--cat, var(--rust));
  transform: rotate(45deg) translateY(-2px);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.5);
}
.category-title {
  margin: 0;
  font-family: var(--font-disp);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--paper);
  text-shadow: 3px 3px 0 rgba(0, 0, 0, 0.6);
  position: relative;
}
/* 幽灵页码 */
.category-head::before {
  content: attr(data-ghost);
  position: absolute;
  right: 0;
  top: -34px;
  font-family: var(--font-disp);
  font-size: 84px;
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(236, 224, 200, 0.14);
  pointer-events: none;
}
.category-count {
  font-size: 11px;
  letter-spacing: 2px;
  padding: 3px 9px;
  border: 1px solid var(--line-hi);
  background: rgba(0, 0, 0, 0.3);
  color: var(--paper-dim);
  transform: rotate(0.6deg);
}

/* ---------- 卡片架（非对称排布） ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(196px, 1fr));
  gap: 20px 26px;
}
.content .category:nth-child(even) .grid { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); }

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--plate);
  border: 1px solid var(--line-hi);
  outline: 1px solid rgba(236, 224, 200, 0.03);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.5);
  transition:
    transform 0.16s var(--motion-spring),
    border-color 0.12s var(--motion-snap),
    box-shadow 0.16s var(--motion-spring);
  animation: fadeUp 0.3s var(--motion-snap) both;
}
/* 手工感：个别卡片轻微旋转 / 下沉 */
.content .category:nth-child(3n+1) .card:nth-child(3n+2) { transform: rotate(-0.5deg); }
.content .category:nth-child(3n+2) .card:nth-child(2n) { transform: translateY(6px); }

.card:hover {
  transform: translateY(-5px) rotate(0deg) !important;
  border-color: var(--cat, var(--rust));
  box-shadow: 8px 9px 0 rgba(0, 0, 0, 0.6);
}

.card-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  display: block;
}
/* 封面上的印刷网点层 */
.card-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background-image:
    radial-gradient(rgba(236, 224, 200, 0.16) 0.8px, transparent 1.4px);
  background-size: 6px 6px;
  opacity: 0.5;
}
/* 悬停扫光 */
.card-cover::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -70%;
  width: 45%;
  z-index: 4;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.28), transparent);
  transform: skewX(-18deg);
  transition: left 0.5s var(--motion-snap);
  pointer-events: none;
}
.card:hover .card-cover::after { left: 125%; }

.cover-emoji {
  position: absolute;
  left: 10%;
  top: 50%;
  transform: translateY(-50%);
  font-size: clamp(40px, 6vw, 58px);
  filter: drop-shadow(0 6px 0 rgba(0, 0, 0, 0.45));
  z-index: 2;
  line-height: 1;
}
.cover-emoji::after {
  content: "";
  display: block;
  width: 100%;
  height: 6px;
  background: rgba(0, 0, 0, 0.35);
  margin: 10px auto 0;
  border-radius: 50%;
  filter: blur(1px);
}
.cover-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 5;
  opacity: 0;
  transition: opacity 0.3s var(--motion-snap);
}
.card-cover.has-img .cover-img { opacity: 1; }
.card-cover.has-img .cover-emoji { display: none; }

/* 悬停播放：CSS 三角，不依赖字符 */
.cover-play {
  position: absolute;
  right: 14%;
  top: 50%;
  z-index: 6;
  width: 46px;
  height: 46px;
  transform: translateY(-50%) scale(0.5);
  opacity: 0;
  border: 2px solid var(--paper);
  background: rgba(21, 17, 11, 0.55);
  transition: transform 0.16s var(--motion-spring), opacity 0.14s var(--motion-snap);
}
.cover-play::before {
  content: "";
  position: absolute;
  left: 18px; top: 50%;
  width: 0; height: 0;
  transform: translate(-30%, -50%);
  border-style: solid;
  border-width: 7px 0 7px 12px;
  border-color: transparent transparent transparent var(--paper);
}
.card:hover .cover-play { opacity: 1; transform: translateY(-50%) scale(1) rotate(-2deg); }

.card-body {
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 1px dashed var(--line);
}
.card-name {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--paper);
}
.card-desc {
  font-size: 12px;
  color: var(--paper-dim);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 计算彩蛋（500px · 藏在最后，默认只露一层灰） ---------- */
.calc-egg {
  min-height: 500px;
  margin: 400px 0 34px;                 /* 与游戏区拉开 400px 距离 */
  border: 1px dashed rgba(107, 90, 62, 0.35);
  background:
    radial-gradient(circle at 8% 18%, rgba(231, 193, 78, 0.03), transparent 32%),
    radial-gradient(circle at 92% 84%, rgba(58, 168, 173, 0.03), transparent 30%),
    var(--noise);
  padding: 30px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: center;
  transition: border-color 0.25s var(--snap);
}
.calc-egg .calc-blurb,
.calc-egg .calc {
  opacity: 0;
  transform: translateY(16px) scale(0.98);
  pointer-events: none;
  transition: opacity 0.4s var(--snap), transform 0.5s var(--motion-spring);
}
.calc-egg:hover .calc-blurb,
.calc-egg:hover .calc,
.calc-egg.open .calc-blurb,
.calc-egg.open .calc,
.calc-egg:focus-within .calc-blurb,
.calc-egg:focus-within .calc {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
/* 默认提示：单行小字，藏在角落 */
.calc-egg .egg-whisper {
  position: absolute;
  left: 0; right: 0;
  bottom: 18px;
  text-align: center;
  font-size: 12px;
  color: rgba(107, 90, 62, 0.6);
  pointer-events: none;
}
.calc-egg:hover .egg-whisper,
.calc-egg.open .egg-whisper { opacity: 0; }
.calc-blurb { color: var(--paper-dim); font-size: 14px; line-height: 2; }
.calc-blurb .rail-h { margin-bottom: 10px; }
.calc-blurb p { margin: 6px 0; }
.calc-blurb .note { color: #7d6f57; font-size: 12px; }
.calc-blurb b { color: var(--lemon); }

.calc {
  width: min(320px, 84vw);
  border: 2px solid var(--line-hi);
  background: rgba(20, 16, 10, 0.75);
  padding: 12px;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.5);
  transform: rotate(0.6deg);
}
.calc-readout {
  font-family: var(--font-disp);
  font-size: clamp(30px, 7vw, 46px);
  text-align: right;
  color: var(--lemon);
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border);
  border-bottom: 3px solid var(--line-hi);
  padding: 10px 14px;
  margin-bottom: 12px;
  overflow: hidden;
  white-space: nowrap;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
}
.calc-readout.err { color: var(--danger); font-size: clamp(20px, 5vw, 28px); }
.calc-keys {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.calc-keys button {
  padding: 14px 0;
  font-size: 18px;
  font-weight: 800;
  color: var(--paper);
  background: var(--plate);
  border: 1px solid var(--border);
  cursor: pointer;
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.5);
  transition: transform 0.1s var(--motion-spring), background 0.1s var(--motion-snap), color 0.1s var(--motion-snap);
}
.calc-keys button:hover { background: var(--plate-2); color: var(--lemon); }
.calc-keys button:active { transform: translate(1px, 1px); box-shadow: 0 0 0 rgba(0,0,0,0.4); }
.calc-keys button.wide2 { grid-column: span 2; }
.calc-keys button.eq {
  background: var(--rust);
  border-color: var(--rust);
  color: var(--ink);
}
.calc-keys button.eq:hover { background: #f07c42; color: var(--ink); }

/* 空结果 ---------- */
.empty-tip {
  margin: 40px 4%;
  padding: 30px;
  border: 2px dashed var(--line-hi);
  background: rgba(32, 26, 18, 0.5);
  font-size: 15px;
  color: var(--paper-dim);
}
.empty-tip button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: 12px;
  padding: 9px 16px;
  background: var(--rust);
  border: 0;
  color: var(--ink);
  font-weight: 800;
  cursor: pointer;
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.5);
  transition: transform 0.12s var(--motion-spring);
}
.empty-tip button:hover { transform: translateY(-2px); }
.empty-tip img { width: 16px; height: 16px; }

/* ---------- 页脚 ---------- */
.colophon {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--line);
  background: rgba(21, 17, 11, 0.5);
  padding: 22px 26px 34px;
  color: var(--paper-dim);
  font-size: 13px;
  line-height: 1.9;
}
.colophon p { margin: 0 0 4px; }
.colophon .dim { font-size: 12px; color: #6f6350; }

/* ---------- 吸顶分类菜单（常驻） ---------- */
.menubar {
  position: sticky;
  top: 0;
  z-index: 60;                        /* 高于版面内容与卡片，不被游戏盖住 */
  max-width: 1240px;
  margin: 0 auto;
  padding: 10px 26px 12px;
  background: rgba(23, 17, 9, 0.94);
  border-bottom: 2px solid var(--line-hi);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(6px);
}
.menubar::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 3px;
  background:
    linear-gradient(90deg, var(--rust) 0 22%, transparent 22% 34%, var(--petrol) 34% 52%, transparent 52% 64%,
      var(--lemon) 64% 78%, transparent 78% 100%);
  opacity: 0.6;
}
.menubar .chapters {
  margin: 0;
  justify-content: flex-start;
  gap: 10px 8px;
}
.menubar .cat-chip {
  font-size: 12px;
  padding: 7px 16px 7px 12px;
}

@media (max-width: 620px) {
  .menubar { padding: 8px 12px 10px; }
  .menubar .cat-chip { font-size: 11px; padding: 6px 12px 6px 9px; }
}

/* ---------- 动画与兼容 ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--line-hi); border: 2px solid var(--ink); }
::-webkit-scrollbar-track { background: var(--ink); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card, .cat-chip, .category, .cover-play, .card-cover::after { transition-duration: 0.01ms; }
  .cover-play { display: none; }
}

/* ---------- 响应式（收窄时收起边条，保持不对称而非三栏） ---------- */
@media (max-width: 980px) {
  .sheet { grid-template-columns: 1fr; }
  .rail {
    order: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .sticker { margin-bottom: 0; }
  .mast-row { grid-template-columns: 1fr; }
  .press-num { max-width: 320px; transform: none; }
}

@media (max-width: 620px) {
  .masthead { padding: 18px 16px 4px; }
  .sheet { padding: 6px 16px 26px; }
  .mast-title { transform: rotate(-1deg); }
  .mast-line { justify-content: flex-start; gap: 4px 18px; }
  .rail { grid-template-columns: 1fr; }
  .chapters { margin-left: 0; }
  .grid { gap: 14px 12px; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); }
  .card-cover::after { display: none; }
}

@media (max-width: 720px) {
  .calc-egg { grid-template-columns: 1fr; justify-items: center; gap: 20px; padding: 24px 16px; }
}