/* ==========================================================================
   开云赛场 · /assets/site.css
   夜间赛场指挥台 · 堆叠面板 / 编号章节 / 框景首屏
   ========================================================================== */

:root {
  /* 色板 */
  --ink: #0A1524;
  --panel: #101F36;
  --edge: #1B2E4A;
  --glass: rgba(18, 32, 52, 0.72);
  --apple: #7DF2B0;
  --apple-deep: #2FBF7B;
  --amber: #FFA23A;
  --ember: #FF6B2C;
  --white: #E9F1FA;
  --mist: #9FB3CC;
  --steel: #6C8AB0;

  /* 渐变 */
  --grad-cool: linear-gradient(160deg, #0A1524 0%, #123A46 100%);
  --grad-sync: linear-gradient(90deg, #2FBF7B 0%, #7DF2B0 100%);
  --grad-ember: linear-gradient(90deg, #FF6B2C 0%, #FFA23A 100%);

  /* 字体 */
  --font-display: 'Barlow Condensed', 'Oswald', 'HarmonyOS Sans Condensed', system-ui, sans-serif;
  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
  --font-sans: 'Noto Sans SC', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 尺度 */
  --rail: 88px;
  --gutter: clamp(18px, 4vw, 40px);
  --maxw: 1240px;
  --r-s: 3px;
  --r-m: 6px;

  /* 动效 */
  --dur-fast: 120ms;
  --dur: 180ms;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

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

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

body {
  margin: 0;
  background-color: var(--ink);
  background-image:
    radial-gradient(circle at 10% -8%, rgba(47, 191, 123, 0.10), transparent 46%),
    radial-gradient(circle at 92% 4%, rgba(255, 162, 58, 0.07), transparent 42%);
  background-repeat: no-repeat;
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

img, svg, video, canvas { max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--apple); text-decoration: none; }
a:hover { color: var(--white); }

h1, h2, h3, h4, h5, h6 { margin: 0; line-height: 1.28; font-weight: 600; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
hr { border: 0; }

:focus-visible {
  outline: 2px solid var(--apple);
  outline-offset: 2px;
  border-radius: 2px;
}

::selection { background: rgba(125, 242, 176, 0.28); color: var(--white); }

/* --------------------------------------------------------- 通用排版 */
.prose { max-width: 34em; }
.prose p { margin-bottom: 1.15em; }
.lede { font-size: 17px; color: var(--mist); max-width: 34em; }

.mono,
.mono-note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.mono-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel);
  text-transform: uppercase;
  white-space: nowrap;
}

.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;
}
.is-hidden { display: none !important; }

/* --------------------------------------------------------- 容器 */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: 46rem; }

.section-rule {
  height: 1px;
  border: 0;
  margin-block: clamp(40px, 6vw, 72px);
  background: linear-gradient(90deg, transparent, var(--edge) 18%, var(--edge) 82%, transparent);
}

/* ==========================================================================
   头部
   ========================================================================== */

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -120px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--apple);
  color: #04121C;
  font-size: 14px;
  font-weight: 600;
  border-radius: 0 0 var(--r-s) var(--r-s);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 0; color: #04121C; }

.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: var(--grad-sync);
  z-index: 150;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.site-header {
  position: relative;
  z-index: 50;
  background: var(--ink);
}

/* ---- 刊头 ---- */
.masthead {
  background: var(--ink);
  padding-block: 22px 18px;
}

.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}

.masthead__status {
  margin: 0;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.pulse-dot {
  flex: none;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--apple-deep);
  animation: dot-pulse 2.4s ease-in-out infinite;
}
@keyframes dot-pulse {
  0%, 100% { opacity: 0.6; box-shadow: 0 0 0 0 rgba(125, 242, 176, 0.45); }
  50%      { opacity: 1;   box-shadow: 0 0 0 6px rgba(125, 242, 176, 0); }
}

.masthead__device {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.sync-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--apple);
  background: rgba(47, 191, 123, 0.10);
  border: 1px solid rgba(125, 242, 176, 0.35);
  border-radius: 999px;
}

/* ---- 品牌刊名 ---- */
.brand {
  justify-self: center;
  display: grid;
  justify-items: center;
  gap: 3px;
  padding: 4px 20px;
  border-inline: 1px solid var(--edge);
  color: var(--white);
  text-align: center;
  transition: border-color var(--dur) var(--ease);
}
.brand__name {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.1;
  transition: color var(--dur) var(--ease);
}
.brand__tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--steel);
}
.brand:hover { border-color: var(--apple); color: var(--white); }
.brand:hover .brand__name { color: var(--apple); }

/* ---- 导航 ---- */
.site-nav {
  display: block;
  border-top: 1px solid var(--edge);
  border-bottom: 1px solid var(--edge);
  background: var(--ink);
}

.site-nav__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(14px, 3vw, 38px);
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 14px 2px;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--mist);
  transition: color var(--dur) var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--apple);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--dur) var(--ease);
}
.site-nav__link:hover { color: var(--white); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--apple); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* ---- 移动导航按钮 ---- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--edge);
  border-radius: var(--r-s);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--apple); color: var(--apple); }
.nav-toggle__bars { display: grid; gap: 3px; width: 16px; }
.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

/* ---- 检索栏 ---- */
.search-rail {
  background: var(--panel);
  border-bottom: 1px solid var(--edge);
  padding-block: 14px;
}
.search-rail__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.search-field {
  flex: 1 1 320px;
  min-width: 200px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 14px;
  background: rgba(10, 21, 36, 0.65);
  border: 1px solid var(--edge);
  border-radius: var(--r-s);
  cursor: text;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.search-field:focus-within {
  border-color: var(--apple);
  box-shadow: 0 0 0 3px rgba(47, 191, 123, 0.16);
}
.search-field__label { flex: none; }
.search-field__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 11px 0;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--white);
  font-size: 14px;
}
.search-field__input::placeholder { color: var(--steel); }
.search-field__input::-webkit-search-cancel-button { filter: invert(1) opacity(0.5); }
.search-field__hint {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--steel);
  white-space: nowrap;
}

/* ---- 收藏横滑条 ---- */
.fav-strip {
  background: var(--ink);
  border-bottom: 1px solid var(--edge);
  padding-block: 12px 10px;
}
.fav-strip__inner {
  display: flex;
  align-items: center;
  gap: 20px;
}
.fav-strip__label {
  flex: 0 0 auto;
  min-width: 150px;
  margin: 0;
  display: grid;
  gap: 2px;
}
.fav-strip__title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--white);
}
.fav-strip__note {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.fav-strip__rail {
  flex: 1 1 auto;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 6px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--edge) transparent;
  -webkit-overflow-scrolling: touch;
}
.fav-strip__rail::-webkit-scrollbar { height: 4px; }
.fav-strip__rail::-webkit-scrollbar-track { background: transparent; }
.fav-strip__rail::-webkit-scrollbar-thumb { background: var(--edge); border-radius: 4px; }

.fav-chip {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: var(--r-s);
  color: var(--mist);
  font-size: 13px;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.fav-chip:hover { border-color: var(--amber); color: var(--white); }
.fav-chip[aria-pressed="true"] {
  border-color: var(--amber);
  background: rgba(255, 162, 58, 0.12);
  color: var(--white);
}
.fav-chip[aria-pressed="true"] .fav-chip__day { color: var(--amber); }
.fav-chip__day {
  padding-right: 10px;
  border-right: 1px solid var(--edge);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--steel);
}

/* ==========================================================================
   页脚
   ========================================================================== */

.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 96px);
  background: var(--panel);
  border-top: 1px solid var(--edge);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: var(--grad-sync);
  opacity: 0.5;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(4, minmax(0, 1fr));
  gap: 44px 28px;
  padding-block: 64px 44px;
}

.footer-brand {
  display: grid;
  gap: 12px;
  align-content: start;
}
.footer-brand .brand {
  justify-items: start;
  padding: 0;
  border-inline: 0;
}
.footer-brand .brand__name { font-size: 24px; }
.footer-brand__line {
  margin: 0;
  max-width: 22em;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.footer-col__title {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--white);
}
.footer-col__title::before {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  margin-bottom: 10px;
  background: var(--amber);
}

.footer-col__list {
  list-style: none;
  display: grid;
  gap: 9px;
}
.footer-col__list a {
  display: inline-block;
  font-size: 14px;
  color: var(--mist);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.footer-col__list a:hover { color: var(--apple); padding-left: 5px; }

.footer-foot {
  display: grid;
  gap: 8px;
  padding-block: 22px 32px;
  border-top: 1px solid var(--edge);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--steel);
}
.footer-foot p { margin: 0; }
.footer-foot__contact { color: var(--mist); }

/* ==========================================================================
   通用组件
   ========================================================================== */

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border: 1px solid transparent;
  border-radius: var(--r-s);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--ember); color: #14060A; }
.btn--primary:hover { background: var(--amber); color: #14060A; }
.btn--ghost { background: transparent; border-color: var(--edge); color: var(--white); }
.btn--ghost:hover { border-color: var(--apple); color: var(--apple); }
.btn--quiet { background: rgba(47, 191, 123, 0.12); border-color: rgba(125, 242, 176, 0.35); color: var(--apple); }
.btn--quiet:hover { background: rgba(47, 191, 123, 0.22); color: var(--apple); }

/* ---- 面包屑 ---- */
.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--steel);
}
.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumbs li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumbs li::after { content: "/"; color: var(--edge); }
.breadcrumbs li:last-child::after { content: none; }
.breadcrumbs a { color: var(--steel); transition: color var(--dur) var(--ease); }
.breadcrumbs a:hover { color: var(--apple); }
.breadcrumbs [aria-current="page"] { color: var(--mist); }

/* ---- 画板面板 ---- */
.panel {
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: var(--r-m);
  padding: clamp(18px, 3vw, 28px);
}
.panel--glass {
  background: var(--glass);
  border: 1px solid var(--edge);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.frame-panel {
  position: relative;
  padding: clamp(24px, 4vw, 56px);
  background: var(--grad-cool);
  border: 1px solid var(--edge);
}
.frame-panel::before,
.frame-panel::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
  border: 1px solid var(--apple);
  opacity: 0.7;
  pointer-events: none;
}
.frame-panel::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.frame-panel::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

/* ---- 编号章节 ---- */
.chapter {
  margin-block: clamp(56px, 8vw, 96px);
  scroll-margin-top: 24px;
}
.chapter__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--edge);
  transition: border-color var(--dur) var(--ease);
}
.chapter.is-current .chapter__head { border-bottom-color: var(--apple); }
.chapter__num {
  flex: none;
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 58px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--steel);
}
@supports (-webkit-text-stroke: 1px red) {
  .chapter__num {
    color: transparent;
    -webkit-text-stroke: 1.5px var(--steel);
  }
}
.chapter__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--white);
}
.chapter__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--steel);
  white-space: nowrap;
}

/* ---- 章节索引点列 ---- */
.chapter-index {
  position: fixed;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  gap: 12px;
  z-index: 40;
}
.chapter-dot {
  width: 9px;
  height: 9px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--steel);
  border-radius: 50%;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.chapter-dot:hover { border-color: var(--apple); }
.chapter-dot.is-current {
  background: var(--apple);
  border-color: var(--apple);
  transform: scale(1.4);
}

/* ---- 网格 ---- */
.grid {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--mirror { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* ---- 数据视觉 ---- */
.score {
  font-family: var(--font-display);
  font-size: clamp(44px, 7vw, 72px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
}
.score__sep { color: var(--steel); margin-inline: 8px; }

.metric {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--apple);
}

.home-mark {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--amber);
}
.home-mark::before {
  content: "";
  width: 8px; height: 8px;
  background: var(--amber);
  transform: rotate(45deg);
}
.away-mark {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}
.away-mark::before {
  content: "";
  width: 8px; height: 8px;
  background: transparent;
  border: 1px solid var(--mist);
  transform: rotate(45deg);
}

/* ---- 内容卡片 ---- */
.card {
  display: block;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: var(--r-m);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.card:hover {
  border-color: var(--apple);
  background: #12243D;
}

/* ---- 图片容器基础规则 ---- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--edge);
  border-radius: var(--r-m);
  background: linear-gradient(160deg, rgba(18, 58, 70, 0.55), rgba(16, 31, 54, 0.92));
  aspect-ratio: 16 / 9;
}
.media-frame > img,
.media-frame > svg,
.media-frame > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 3px 9px;
  background: rgba(10, 21, 36, 0.72);
  border-radius: var(--r-s);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---- FAQ ---- */
.faq-item {
  border-bottom: 1px solid var(--edge);
}
.faq-item summary {
  padding: 18px 0;
  cursor: pointer;
  font-weight: 600;
  color: var(--white);
  list-style: none;
  transition: color var(--dur) var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  float: right;
  font-family: var(--font-mono);
  color: var(--apple);
}
.faq-item[open] summary::after { content: "–"; }
.faq-item summary:hover { color: var(--apple); }
.faq-item p { color: var(--mist); padding-bottom: 6px; }

/* ==========================================================================
   响应式
   ========================================================================== */

@media (max-width: 1180px) {
  .chapter-index { display: none; }
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 36px 24px;
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .masthead__inner {
    grid-template-columns: auto 1fr auto;
    grid-template-areas:
      "toggle brand device"
      "status status status";
    gap: 12px;
  }
  .masthead { padding-block: 16px 14px; }
  .brand { grid-area: brand; padding: 4px 12px; }
  .masthead__status { grid-area: status; justify-self: start; }
  .masthead__device { grid-area: device; }
  .nav-toggle { grid-area: toggle; }

  .site-nav {
    display: none;
    background: var(--glass);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
  }
  .site-header[data-open="true"] .site-nav { display: block; }

  .site-nav__list {
    flex-direction: column;
    gap: 0;
    padding-block: 6px;
  }
  .site-nav__list li { border-bottom: 1px solid var(--edge); }
  .site-nav__list li:last-child { border-bottom: 0; }
  .site-nav__link { padding: 15px 4px; }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] {
    padding-left: 14px;
    border-left: 2px solid var(--apple);
  }

  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .search-field__hint { display: none; }
  .fav-strip__inner {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .fav-strip__label { min-width: 0; }
  .chapter__head { flex-wrap: wrap; gap: 10px 14px; }
  .chapter__meta { margin-left: 0; width: 100%; }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 20px;
    padding-block: 48px 32px;
  }
}

@media (max-width: 560px) {
  .masthead__device .mono-label { display: none; }
  .masthead__status { font-size: 11px; letter-spacing: 0.04em; }
  .grid--mirror { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .footer-grid { grid-template-columns: 1fr; }
  .brand__name { font-size: 22px; }
  .brand__tag { font-size: 10px; letter-spacing: 0.1em; }
}

/* ==========================================================================
   无障碍：减少动效
   ========================================================================== */
@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;
  }
  .pulse-dot { animation: none; opacity: 1; }
  .scroll-progress { transition: none; }
}