/* ============================================================
   杏运娱乐 · 共享站点样式 /assets/site.css
   深靛蓝 + 杏果橙 · 锐利直角 · 1px 精密网格
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; }
li { list-style: none; }
img { display: block; max-width: 100%; height: auto; }
svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; }

:focus-visible {
  outline: 2px solid var(--apricot);
  outline-offset: 2px;
}

::selection { background: var(--apricot); color: var(--indigo); }

/* ---------- tokens ---------- */
:root {
  --indigo-900: #141F38;
  --indigo: #1B2A4A;
  --indigo-700: #24395F;
  --indigo-500: #3A5480;
  --apricot: #F28C28;
  --gold: #E8B84B;
  --cream: #FAF7F2;
  --sand: #EFE9E0;
  --paper: #FFFFFF;
  --mist: #C9D2E0;
  --ink: #14181F;
  --grey: #5A6473;

  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --shell: 1240px;
  --gutter: 24px;
  --space-s: 40px;
  --space-m: 64px;
  --space-l: 96px;
  --line: 1px solid var(--mist);
  --line-dark: 1px solid rgba(201, 210, 224, 0.18);
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
}

/* ---------- 容器 ---------- */
.shell {
  width: min(var(--shell), 100% - (var(--gutter) * 2));
  margin-inline: auto;
}

/* ---------- 跳至正文 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--apricot);
  color: var(--indigo);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  transition: top 0.18s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ============================================================
   页头 · 双层刻度条
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: var(--indigo);
  color: var(--cream);
  border-bottom: 1px solid rgba(201, 210, 224, 0.18);
}

.header-upper { background: var(--indigo); border-bottom: 1px solid rgba(201, 210, 224, 0.16); }

.header-upper__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 60px;
  padding: 12px 0;
}

.brand { display: inline-flex; align-items: center; gap: 12px; flex: none; }

.brand__mark {
  position: relative;
  width: 26px;
  height: 26px;
  flex: 0 0 26px;
  border: 1px solid var(--apricot);
}
.brand__mark::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -1px;
  width: 1px;
  height: 26px;
  background: var(--apricot);
  transform: translateX(-50%) rotate(45deg);
}
.brand__mark::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -4px;
  width: 8px;
  height: 8px;
  background: var(--gold);
}

.brand__text { display: block; }
.brand__name {
  display: block;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.15;
  letter-spacing: 0.04em;
  color: var(--cream);
}
.brand__tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.4;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.header-upper__scope {
  margin-left: auto;
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: rgba(250, 247, 242, 0.62);
  white-space: nowrap;
}

.header-upper__meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding-left: 20px;
  border-left: 1px solid rgba(201, 210, 224, 0.22);
  font-size: 12px;
  color: rgba(250, 247, 242, 0.58);
  white-space: nowrap;
}
.header-upper__dot {
  width: 6px;
  height: 6px;
  flex: none;
  background: var(--apricot);
}

.header-lower { position: relative; background: var(--indigo-700); }

.header-lower__inner {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 16px;
}

.nav { display: flex; align-items: stretch; min-width: 0; }

.nav__list {
  display: flex;
  align-items: stretch;
  gap: 2px;
  margin: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.nav__list::-webkit-scrollbar { display: none; }

.nav__item { display: flex; }

.nav__link {
  position: relative;
  display: block;
  padding: 13px 16px;
  font-size: 15px;
  line-height: 1.6;
  white-space: nowrap;
  color: rgba(250, 247, 242, 0.76);
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.nav__link:hover { color: #fff; background: rgba(242, 140, 40, 0.12); }
.nav__link[aria-current="page"] { color: #fff; border-bottom-color: var(--apricot); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  align-self: center;
  margin: 8px 0;
  padding: 8px 14px;
  border: 1px solid rgba(201, 210, 224, 0.35);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.nav-toggle:hover { border-color: var(--apricot); color: var(--apricot); }

.nav-toggle__bars { display: grid; gap: 3px; width: 16px; }
.nav-toggle__bars span { display: block; height: 1px; background: currentColor; }
.nav-toggle__bars span:last-child { width: 10px; }
.nav-toggle__label { line-height: 1; }

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(201, 210, 224, 0.14);
  pointer-events: none;
}
.scroll-meter__bar {
  display: block;
  width: 0;
  height: 100%;
  background: var(--apricot);
}

/* ============================================================
   页脚 · 图例版
   ============================================================ */
.site-footer {
  background: var(--indigo);
  color: rgba(250, 247, 242, 0.72);
  border-top: 1px solid rgba(201, 210, 224, 0.2);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding: 72px 0 56px;
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(201, 210, 224, 0.18);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-brand {
  display: inline-block;
  margin-bottom: 16px;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cream);
}
.footer-brand:hover { color: var(--apricot); }

.footer-brand__note {
  max-width: 30ch;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(250, 247, 242, 0.62);
}
.footer-brand__mono {
  margin-top: 16px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--indigo-500);
  filter: brightness(1.5);
}

.footer-list { display: grid; gap: 10px; margin: 0; }
.footer-list a,
.footer-list span { font-size: 14px; line-height: 1.7; color: rgba(250, 247, 242, 0.72); }
.footer-list a { transition: color 0.2s var(--ease); }
.footer-list a:hover { color: var(--apricot); }
.footer-list--plain li { color: rgba(250, 247, 242, 0.72); }
.footer-list--plain .mono { font-size: 13px; letter-spacing: 0.02em; }

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  padding: 9px 16px;
  border: 1px solid rgba(201, 210, 224, 0.35);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.copy-btn:hover { border-color: var(--apricot); color: var(--apricot); }
.copy-btn[data-copied="true"] { border-color: var(--gold); color: var(--gold); background: rgba(232, 184, 75, 0.1); }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 32px;
  padding: 20px 0 28px;
  border-top: 1px solid rgba(201, 210, 224, 0.16);
}
.footer-base__item {
  font-size: 12px;
  line-height: 1.6;
  color: rgba(250, 247, 242, 0.5);
}

/* ============================================================
   排版
   ============================================================ */
h1, .t-display {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(48px, 6vw, 88px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

h2, .t-h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(26px, 3.2vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.005em;
}

h3, .t-h3 {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.4;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--apricot);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  flex: none;
  background: currentColor;
}

.section__lead {
  max-width: 62ch;
  margin-top: 16px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--grey);
}

.prose { max-width: 68ch; font-size: 16px; line-height: 1.75; }
.prose p + p { margin-top: 16px; }
.prose ul, .prose ol { margin: 16px 0; padding-left: 22px; }
.prose li { list-style: disc; margin: 6px 0; }
.prose ol li { list-style: decimal; }
.prose strong { font-weight: 700; color: var(--indigo); }
.prose a { color: var(--indigo-500); border-bottom: 1px solid var(--mist); }
.prose a:hover { color: var(--apricot); border-bottom-color: var(--apricot); }

/* ============================================================
   区块与明暗节奏
   ============================================================ */
.section { padding: var(--space-l) 0; }
.section--tight { padding: var(--space-m) 0; }
.section--dense { padding: var(--space-s) 0; }
.section--sand { background: var(--sand); }
.section--dark { background: var(--indigo); color: var(--cream); }
.section--dark h2,
.section--dark h3 { color: var(--cream); }
.section--dark .eyebrow { color: var(--gold); }
.section--dark .section__lead { color: rgba(250, 247, 242, 0.72); }

/* 1px 精密列线 */
.rule-cols {
  background-image: linear-gradient(to right, rgba(201, 210, 224, 0.5) 0 1px, transparent 1px);
  background-size: calc(100% / 12) 100%;
  background-repeat: repeat-x;
}
.ticks {
  height: 14px;
  border-top: var(--line);
  background-image: repeating-linear-gradient(to right, rgba(201, 210, 224, 0.9) 0 1px, transparent 1px 16px);
}

/* ============================================================
   左右分屏骨架
   ============================================================ */
.split {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  align-items: start;
}
.split__rail {
  position: sticky;
  top: 132px;
  align-self: start;
  padding-right: clamp(24px, 4vw, 56px);
}
.split__main {
  min-width: 0;
  padding-left: clamp(24px, 4vw, 56px);
  border-left: var(--line);
}

/* ============================================================
   通用按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn:hover { transform: translateX(2px); }

.btn--primary { background: var(--apricot); color: var(--indigo); }
.btn--primary:hover { background: var(--gold); }

.btn--ghost { border-color: var(--mist); color: var(--ink); }
.btn--ghost:hover { border-color: var(--apricot); color: var(--apricot); }

.btn--on-dark { border-color: rgba(201, 210, 224, 0.4); color: var(--cream); }
.btn--on-dark:hover { border-color: var(--apricot); color: var(--apricot); }

.btn--block { display: flex; width: 100%; justify-content: space-between; }

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb { padding: 20px 0; }
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--grey);
}
.breadcrumb li { display: flex; align-items: center; gap: 8px; list-style: none; }
.breadcrumb li + li::before { content: "/"; color: var(--mist); }
.breadcrumb a { color: var(--indigo-500); transition: color 0.2s var(--ease); }
.breadcrumb a:hover { color: var(--apricot); }
.breadcrumb [aria-current="page"] { color: var(--ink); }

/* ============================================================
   卡片 / 图例
   ============================================================ */
.card {
  padding: 24px;
  background: var(--paper);
  border: 1px solid var(--mist);
}
.card--dark {
  background: var(--indigo-700);
  border-color: rgba(201, 210, 224, 0.22);
  color: var(--cream);
}
.card--dark .card__title { color: var(--cream); }
.card__title { font-family: var(--font-sans); font-weight: 800; font-size: 18px; line-height: 1.4; }
.card__meta { margin-top: 8px; font-family: var(--font-mono); font-size: 12px; color: var(--grey); }
.card--dark .card__meta { color: rgba(250, 247, 242, 0.6); }

.legend { display: grid; gap: 12px; }
.legend__item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey);
}
.legend__swatch {
  width: 10px;
  height: 10px;
  flex: none;
  margin-top: 7px;
  background: var(--apricot);
}
.legend__swatch--gold { background: var(--gold); }
.legend__swatch--mist { background: var(--mist); }
.legend__swatch--indigo { background: var(--indigo-500); }

/* ============================================================
   坐标索引
   ============================================================ */
.coord-list { border-top: var(--line); }
.coord-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: var(--line);
}
.coord-item__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--apricot);
}
.coord-item__label { font-weight: 600; font-size: 15px; }
.coord-item__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grey);
  white-space: nowrap;
}

/* ============================================================
   细线表格
   ============================================================ */
.table { width: 100%; background: var(--paper); font-size: 15px; }
.table caption {
  padding-bottom: 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey);
}
.table th {
  padding: 12px 14px;
  background: var(--indigo);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-align: left;
  white-space: nowrap;
}
.table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--mist);
  vertical-align: top;
  line-height: 1.7;
}
.table tbody tr:nth-child(even) { background: var(--sand); }

/* ============================================================
   折叠面板
   ============================================================ */
.accordion { background: var(--paper); border: 1px solid var(--mist); }
.accordion__item + .accordion__item { border-top: 1px solid var(--mist); }
.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 20px;
  font-weight: 600;
  font-size: 16px;
  line-height: 1.6;
  text-align: left;
  color: var(--ink);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.accordion__trigger:hover { background: var(--sand); }
.accordion__trigger[aria-expanded="true"] { color: var(--apricot); }
.accordion__icon {
  position: relative;
  width: 12px;
  height: 12px;
  flex: none;
}
.accordion__icon::before,
.accordion__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
}
.accordion__icon::before { left: 0; top: 5px; width: 12px; height: 1px; }
.accordion__icon::after { left: 5px; top: 0; width: 1px; height: 12px; }
.accordion__trigger[aria-expanded="true"] .accordion__icon::after { display: none; }
.accordion__panel { padding: 0 20px 20px; color: var(--grey); font-size: 15px; line-height: 1.8; }
.accordion__panel[hidden] { display: none; }

/* ============================================================
   图片容器（页面阶段放置占位图）
   ============================================================ */
.frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--sand);
  border: 1px solid var(--mist);
  aspect-ratio: 16 / 10;
}
.frame--wide { aspect-ratio: 21 / 9; }
.frame--tall { aspect-ratio: 3 / 4; }
.frame--square { aspect-ratio: 1 / 1; }
.frame--dark { background: var(--indigo-700); border-color: rgba(201, 210, 224, 0.24); }
.frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.frame__tag {
  position: absolute;
  left: 0;
  top: 0;
  padding: 6px 12px;
  background: var(--apricot);
  color: var(--indigo);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.frame__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--grey);
}

/* ============================================================
   目录 / 显现 / 返回顶部
   ============================================================ */
.toc { display: grid; gap: 2px; }
.toc__link {
  display: block;
  padding: 7px 0 7px 14px;
  border-left: 1px solid var(--mist);
  font-size: 14px;
  line-height: 1.6;
  color: var(--grey);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.toc__link:hover { color: var(--ink); border-left-color: var(--indigo-500); }
.toc__link[aria-current="true"] {
  color: var(--ink);
  border-left-color: var(--apricot);
  background: rgba(242, 140, 40, 0.07);
}
.toc__link .mono { margin-right: 8px; font-size: 12px; color: var(--apricot); }

[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
[data-reveal][data-revealed="true"] { opacity: 1; transform: none; }

.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 60;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: var(--indigo);
  color: var(--cream);
  border: 1px solid rgba(242, 140, 40, 0.6);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.24s var(--ease), visibility 0.24s var(--ease), background-color 0.2s var(--ease);
}
.to-top[data-visible="true"] { opacity: 1; visibility: visible; }
.to-top:hover { background: var(--indigo-700); border-color: var(--apricot); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1040px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px 32px; padding: 56px 0 40px; }
}

@media (max-width: 980px) {
  .split { grid-template-columns: minmax(0, 1fr); }
  .split__rail {
    position: static;
    top: auto;
    padding-right: 0;
  }
  .split__main {
    padding-left: 0;
    margin-top: 32px;
    border-left: 0;
  }
}

@media (max-width: 880px) {
  :root { --gutter: 18px; --space-l: 64px; --space-m: 48px; --space-s: 32px; }
  html { scroll-padding-top: 108px; }

  .header-upper__inner { min-height: 52px; padding: 10px 0; gap: 14px; }
  .header-upper__scope { display: none; }
  .header-upper__meta { margin-left: auto; padding-left: 14px; border-left: 0; }
  .brand__name { font-size: 18px; }
  .brand__mark { width: 22px; height: 22px; flex-basis: 22px; }
  .brand__mark::before { height: 22px; }

  .nav-toggle { display: inline-flex; }

  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: block;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    background: var(--indigo-700);
    border-bottom: 1px solid rgba(201, 210, 224, 0.24);
    transition: max-height 0.26s var(--ease), visibility 0.26s var(--ease);
  }
  .nav[data-open="true"] {
    max-height: min(76vh, 520px);
    overflow-y: auto;
    visibility: visible;
  }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; padding: 6px 0; overflow: visible; }
  .nav__item { display: block; border-bottom: 1px solid rgba(201, 210, 224, 0.12); }
  .nav__item:last-child { border-bottom: 0; }
  .nav__link {
    padding: 13px 18px;
    font-size: 16px;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }
  .nav__link[aria-current="page"] { border-left-color: var(--apricot); background: rgba(242, 140, 40, 0.1); }

  .coord-item { grid-template-columns: 34px minmax(0, 1fr); }
  .coord-item__meta { grid-column: 2; }
}

@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; padding: 44px 0 32px; }
  .footer-base { gap: 6px 20px; padding: 16px 0 22px; }
  .table { font-size: 14px; }
  .table th, .table td { padding: 10px 10px; }
  .to-top { right: 14px; bottom: 14px; }
}

/* ============================================================
   偏好与打印
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .btn:hover { transform: none; }
}

@media print {
  .site-header, .site-footer, .to-top { display: none; }
  body { background: #fff; color: #000; }
}