/* =========================================================
   58买球指南 · 全站共享样式  /assets/site.css
   头部 / 页脚 / 变量 / 排版 / 通用组件
   ========================================================= */

/* ---------- 1. RESET ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
summary { cursor: pointer; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --deep-pitch: #0E3B2E;
  --pitch-mid: #14684A;
  --pitch-light: #1E8A63;
  --orange: #FF7A1A;
  --orange-ink: #A84700;
  --blue: #2BD2FF;
  --blue-ink: #0B5D74;
  --green: #37F2A0;
  --green-ink: #0B5B3C;
  --warm-white: #F6F3EC;
  --charcoal: #14161A;
  --graphite: #3A4048;
  --mid-gray: #8A9199;
  --alert: #FF4D3D;

  --paper: var(--warm-white);
  --ink: var(--charcoal);
  --line: rgba(20, 22, 26, .16);
  --line-strong: rgba(20, 22, 26, .44);
  --line-invert: rgba(246, 243, 236, .20);
  --line-invert-strong: rgba(246, 243, 236, .48);

  --font-display: "Archivo Black", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Menlo, Consolas, "Noto Sans Mono CJK SC", monospace;

  --shell-max: 1440px;
  --gutter: clamp(16px, 4vw, 56px);
  --header-h: 58px;
  --gap: clamp(16px, 2.4vw, 32px);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 160ms;
  --shadow-float: 0 20px 44px -26px rgba(14, 59, 46, .60);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--warm-white);
  background-image:
    linear-gradient(90deg, rgba(20, 22, 26, .045) 1px, transparent 1px),
    linear-gradient(180deg, rgba(20, 22, 26, .035) 1px, transparent 1px);
  background-size: 96px 96px, 96px 96px;
  color: var(--charcoal);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .004em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { line-height: 1.25; }

.site-main { flex: 1 1 auto; display: block; }
#main-content { scroll-margin-top: calc(var(--header-h) + 14px); }

.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.rule { height: 1px; border: 0; background: var(--line); margin: clamp(24px, 3vw, 40px) 0; }

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

:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.site-header :focus-visible, .site-footer :focus-visible { outline-color: var(--green); }

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -80px; left: 12px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--orange);
  color: var(--charcoal);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 10px; }

/* ---------- 5. 页头 · 紧凑命令栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-color: var(--deep-pitch);
  background-image: linear-gradient(180deg, #0E3B2E 0%, #0B2E24 100%);
  color: var(--warm-white);
  border-bottom: 1px solid rgba(55, 242, 160, .30);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background-image: repeating-linear-gradient(90deg, rgba(55, 242, 160, .40) 0 1px, transparent 1px 16px);
  opacity: .55;
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
}

/* 品牌 */
.brand { display: flex; align-items: center; gap: 10px; padding-block: 8px; flex: 0 0 auto; }
.brand__mark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.4;
  letter-spacing: .04em;
  padding: 1px 8px;
  background: var(--green);
  color: var(--deep-pitch);
}
.brand__text { display: flex; flex-direction: column; justify-content: center; min-width: 0; }
.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.1;
  letter-spacing: .01em;
  color: var(--warm-white);
}
.brand__tagline {
  display: block;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: .08em;
  color: rgba(246, 243, 236, .58);
}

/* 导航 */
.site-nav { flex: 1 1 auto; min-width: 0; }
.site-nav__list { display: flex; align-items: stretch; gap: 2px; }
.site-nav__item { display: flex; }
.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  height: var(--header-h);
  padding: 0 clamp(8px, 1.1vw, 16px);
  font-size: 14.5px;
  color: rgba(246, 243, 236, .70);
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: rgba(43, 210, 255, .78);
}
.site-nav__label { font-weight: 500; }
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 2px;
  background: var(--blue);
  transition: right var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.site-nav__link:hover { color: var(--warm-white); background: rgba(246, 243, 236, .07); }
.site-nav__link:hover::after { right: 0; }

.site-nav__link[aria-current="page"] {
  color: var(--warm-white);
  border-left-color: var(--blue);
  background: rgba(55, 242, 160, .09);
}
.site-nav__link[aria-current="page"]::after { right: 0; background: var(--orange); }
.site-nav__link[aria-current="page"] .site-nav__idx { color: var(--orange); }

/* 状态标签 */
.header-status {
  margin-left: auto;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 11px;
  border: 1px solid var(--line-invert);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: rgba(246, 243, 236, .74);
  white-space: nowrap;
}
.header-status__dot {
  width: 6px; height: 6px; flex: 0 0 auto;
  background: var(--green);
  animation: statusPulse 2.6s ease-in-out infinite;
}
@keyframes statusPulse { 0%, 100% { opacity: 1; } 50% { opacity: .28; } }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  height: 36px;
  padding: 0 11px;
  border: 1px solid var(--line-invert-strong);
  color: var(--warm-white);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-toggle:hover { color: var(--blue); border-color: var(--blue); }
.nav-toggle__bars { display: flex; flex-direction: column; gap: 3px; width: 14px; }
.nav-toggle__bars i { display: block; height: 2px; width: 100%; background: currentColor; }
.nav-toggle__bars i:nth-child(2) { width: 9px; }

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: rgba(246, 243, 236, .13);
  overflow: hidden;
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--orange) 0%, var(--blue) 100%);
  transition: transform 90ms linear;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  background-color: var(--deep-pitch);
  background-image:
    repeating-radial-gradient(ellipse 140% 92% at 8% 130%, transparent 0 34px, rgba(246, 243, 236, .055) 34px 35px),
    repeating-radial-gradient(ellipse 110% 80% at 92% -20%, transparent 0 26px, rgba(55, 242, 160, .075) 26px 27px),
    linear-gradient(180deg, #0E3B2E 0%, #0A2A20 100%);
  color: var(--warm-white);
}
.site-footer__inner {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(40px, 5vw, 76px) var(--gutter) clamp(28px, 3vw, 44px);
}
.footer-grid { display: grid; grid-template-columns: 1fr; gap: clamp(26px, 3vw, 40px); }

.footer-col { min-width: 0; }
.footer-wordmark {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.15;
  letter-spacing: .01em;
  transition: color var(--dur) var(--ease);
}
.footer-wordmark:hover { color: var(--green); }
.footer-tagline { margin-top: 9px; font-size: 14px; color: rgba(246, 243, 236, .72); }
.footer-version {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 15px;
  padding: 5px 11px;
  border: 1px solid var(--line-invert);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: rgba(246, 243, 236, .82);
}
.footer-version__key { color: var(--green); }

.footer-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--blue);
}
.footer-list { display: grid; gap: 9px; }
.footer-link {
  font-size: 14.5px;
  color: rgba(246, 243, 236, .76);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-link:hover { color: var(--warm-white); border-bottom-color: var(--orange); }

.footer-contact { display: grid; gap: 10px; }
.footer-contact__row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
}
.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--mid-gray);
}
.footer-contact__val { color: rgba(246, 243, 236, .88); word-break: break-word; }
.copy-btn {
  align-self: center;
  padding: 3px 9px;
  border: 1px solid var(--line-invert);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: rgba(246, 243, 236, .70);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.copy-btn:hover { color: var(--blue); border-color: var(--blue); }
.copy-btn[data-copied="true"] { color: var(--green); border-color: var(--green); }
.copy-btn[data-copied="false"] { color: var(--alert); border-color: var(--alert); }
.footer-note {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.85;
  letter-spacing: .04em;
  color: rgba(246, 243, 236, .58);
}

.site-footer__legal {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 16px var(--gutter) 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  justify-content: space-between;
  border-top: 1px solid var(--line-invert);
}
.footer-legal {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.75;
  letter-spacing: .05em;
  color: rgba(246, 243, 236, .62);
}
.footer-legal--dim { color: rgba(246, 243, 236, .42); }

/* ---------- 7. 网格与非对称版式 ---------- */
.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gap); }
.col-main { grid-column: 2 / 9; }
.col-aside { grid-column: 9 / 13; }
.col-wide { grid-column: 2 / 13; }
.col-narrow { grid-column: 3 / 11; }
.col-full { grid-column: 1 / -1; }

/* ---------- 8. 标题与导语 ---------- */
.display {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--deep-pitch);
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--pitch-mid);
}
.kicker::before { content: ""; width: 26px; height: 2px; background: var(--orange); flex: 0 0 auto; }
.lede {
  max-width: 62ch;
  font-size: clamp(16.5px, 1.5vw, 19px);
  line-height: 1.8;
  color: var(--graphite);
}
.page-head { padding: clamp(26px, 4vw, 52px) 0 clamp(20px, 2.6vw, 34px); }
.page-head__title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.4vw, 48px);
  line-height: 1.12;
  letter-spacing: -.005em;
  color: var(--deep-pitch);
  margin-top: 12px;
}
.page-head__lede { margin-top: 14px; max-width: 64ch; font-size: 17px; color: var(--graphite); }

/* ---------- 9. 框景与分区 ---------- */
.frame {
  position: relative;
  border: 1px solid var(--line-strong);
  padding: clamp(20px, 3vw, 46px);
  background: rgba(255, 255, 255, .55);
}
.frame::before, .frame::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 14px);
  opacity: .7;
}
.frame::before { top: -1px; }
.frame::after { bottom: -1px; }

.section { padding: clamp(40px, 5vw, 80px) 0; border-top: 1px solid var(--line); }
.section--dark { background: var(--deep-pitch); color: var(--warm-white); border-top-color: rgba(55, 242, 160, .3); }
.section--tint { background: rgba(20, 22, 26, .035); }
.section--paper { background: var(--warm-white); }
.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  margin-bottom: clamp(20px, 2.6vw, 36px);
}
.section__index { font-family: var(--font-mono); font-size: 12px; letter-spacing: .16em; color: var(--blue-ink); }
.section__title {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.2;
  letter-spacing: .005em;
  color: var(--deep-pitch);
}
.section--dark .section__title { color: var(--warm-white); }
.section--dark .section__index { color: var(--blue); }
.section--dark .kicker { color: var(--green); }
.section--dark .prose { color: rgba(246, 243, 236, .86); }
.section--dark .prose h2, .section--dark .prose h3, .section--dark .prose strong { color: var(--warm-white); }
.section--dark .note { background: rgba(43, 210, 255, .08); color: rgba(246, 243, 236, .84); }

/* ---------- 10. 卡片 ---------- */
.card {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--line-strong);
  padding: clamp(18px, 2vw, 26px);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  left: -1px; top: -1px; bottom: -1px;
  width: 3px;
  background: var(--green);
  transform: scaleY(0);
  transform-origin: 50% 0;
  transition: transform var(--dur) var(--ease);
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-float); border-color: var(--line-strong); }
.card:hover::before { transform: scaleY(1); }
.card--float { transform: translateY(-6px) rotate(-1.2deg); box-shadow: var(--shadow-float); }
.card--float:hover { transform: translateY(-8px) rotate(0deg); }
.card--tilt { transform: rotate(-3deg); }
.card--tilt:hover { transform: rotate(0deg) translateY(-2px); }
.card__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mid-gray);
}
.card__value {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.01em;
  color: var(--deep-pitch);
}
.card__title {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--charcoal);
}
.card__meta { margin-top: 10px; font-size: 13.5px; color: var(--graphite); }

/* ---------- 11. 数据 ---------- */
.stat-grid { display: grid; gap: var(--gap); grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.stat { padding-left: 14px; border-left: 2px solid var(--pitch-light); display: grid; gap: 6px; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--deep-pitch);
}
.stat__label { font-size: 13.5px; color: var(--graphite); }

.num { font-family: var(--font-mono); font-weight: 500; letter-spacing: .02em; color: var(--pitch-mid); }
.num--ink { color: var(--orange-ink); }

/* ---------- 12. 图形容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  background: var(--charcoal);
  border: 1px solid var(--line-strong);
}
.media__img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16 / 9; }
.media--3x2 .media__img { aspect-ratio: 3 / 2; }
.media--1x1 .media__img { aspect-ratio: 1 / 1; }
.media--tall .media__img { aspect-ratio: 4 / 5; }
.media__ph {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(135deg, rgba(55, 242, 160, .10) 0 8px, transparent 8px 16px),
    linear-gradient(160deg, #14684A 0%, #0E3B2E 100%);
}
.media__ph--static { position: relative; aspect-ratio: 16 / 9; }
.media__badge {
  position: absolute;
  left: 0; top: 0;
  padding: 4px 10px;
  background: var(--orange);
  color: var(--charcoal);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
}
.media__caption {
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  background: var(--warm-white);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--graphite);
}
.media--tilt { transform: rotate(-2deg); box-shadow: var(--shadow-float); }

/* ---------- 13. 按钮 ---------- */
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--charcoal);
  background: var(--charcoal);
  color: var(--warm-white);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--orange); border-color: var(--orange); color: var(--charcoal); font-weight: 600; }
.btn--primary:hover { background: var(--deep-pitch); border-color: var(--deep-pitch); color: var(--green); }
.btn--ghost { background: transparent; color: var(--charcoal); border-color: var(--line-strong); }
.btn--ghost:hover { background: var(--deep-pitch); border-color: var(--deep-pitch); color: var(--warm-white); }
.btn--onDark { background: transparent; color: var(--warm-white); border-color: var(--line-invert-strong); }
.btn--onDark:hover { background: var(--green); border-color: var(--green); color: var(--deep-pitch); }
.btn__arrow { font-family: var(--font-mono); }

/* ---------- 14. 索引与目录 ---------- */
.index-list { display: grid; border-top: 1px solid var(--line); }
.index-list__item { display: flex; align-items: baseline; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.index-list__idx { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .08em; color: var(--mid-gray); flex: 0 0 auto; }
.index-list__label { font-size: 15.5px; color: var(--charcoal); }

.toc { border-left: 2px solid var(--blue); padding: 4px 0 4px 16px; }
.toc__list { display: grid; gap: 8px; }
.toc__item { display: block; }
.toc__link {
  position: relative;
  display: inline-block;
  font-size: 14.5px;
  color: var(--graphite);
  transition: color var(--dur) var(--ease);
}
.toc__link::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: -2px;
  height: 1px;
  background: var(--blue);
  transition: right var(--dur) var(--ease);
}
.toc__link:hover { color: var(--deep-pitch); }
.toc__link:hover::after { right: 0; }
.toc__link[aria-current] { color: var(--deep-pitch); font-weight: 700; }
.toc__link[aria-current]::after { right: 0; background: var(--orange); }

/* 折叠条目 */
.fold { border: 1px solid var(--line); background: #ffffff; }
.fold__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--deep-pitch);
  list-style: none;
}
.fold__summary::-webkit-details-marker { display: none; }
.fold__summary::before {
  content: "+";
  flex: 0 0 auto;
  width: 14px;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--orange-ink);
}
.fold[open] .fold__summary::before { content: "–"; }
.fold__body { padding: 14px 16px 18px; border-top: 1px solid var(--line); font-size: 15.5px; line-height: 1.8; color: var(--graphite); }

/* ---------- 15. 表格 ---------- */
.table-scroll { width: 100%; overflow-x: auto; border: 1px solid var(--line); background: #ffffff; }
.data-table { min-width: 560px; font-size: 14.5px; }
.data-table th, .data-table td { padding: 11px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.data-table th {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--pitch-mid);
  background: rgba(20, 22, 26, .035);
  white-space: nowrap;
}
.data-table tbody tr:hover { background: rgba(43, 210, 255, .07); }
.data-table td.num { font-family: var(--font-mono); color: var(--deep-pitch); white-space: nowrap; }

/* ---------- 16. 旁注 / 标签 / 链接 ---------- */
.note {
  border-left: 2px solid var(--blue);
  background: rgba(43, 210, 255, .07);
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}
.note__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue-ink);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line-strong);
  background: rgba(20, 22, 26, .03);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--graphite);
}
.tag--blue { color: var(--blue-ink); border-color: rgba(43, 210, 255, .6); background: rgba(43, 210, 255, .13); }
.tag--orange { color: var(--orange-ink); border-color: rgba(255, 122, 26, .55); background: rgba(255, 122, 26, .13); }
.tag--green { color: var(--green-ink); border-color: rgba(55, 242, 160, .6); background: rgba(55, 242, 160, .15); }
.section--dark .tag, .site-footer .tag { color: var(--blue); border-color: rgba(43, 210, 255, .4); background: rgba(43, 210, 255, .08); }

.link {
  position: relative;
  display: inline-block;
  color: var(--pitch-mid);
  font-weight: 500;
  transition: color var(--dur) var(--ease);
}
.link::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: -2px;
  height: 1px;
  background: var(--blue);
  transition: right var(--dur) var(--ease);
}
.link:hover { color: var(--deep-pitch); }
.link:hover::after { right: 0; }

/* ---------- 17. 面包屑 ---------- */
.breadcrumb { padding: 14px 0; border-bottom: 1px solid var(--line); }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mid-gray);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 9px; }
.breadcrumb__link { color: var(--graphite); transition: color var(--dur) var(--ease); }
.breadcrumb__link:hover { color: var(--pitch-mid); }
.breadcrumb__sep { color: var(--mid-gray); }
.breadcrumb__current { color: var(--charcoal); }

/* ---------- 18. 正文 ---------- */
.prose { max-width: 72ch; font-size: 17px; line-height: 1.85; color: var(--charcoal); }
.prose > * + * { margin-top: 1.05em; }
.prose h2 {
  margin-top: 1.9em;
  font-family: var(--font-display);
  font-size: clamp(23px, 2.8vw, 31px);
  line-height: 1.28;
  letter-spacing: .005em;
  color: var(--deep-pitch);
}
.prose h3 { margin-top: 1.6em; font-size: 19px; font-weight: 700; color: var(--pitch-mid); }
.prose ul, .prose ol { display: grid; gap: .5em; }
.prose li { position: relative; padding-left: 1.35em; }
.prose li::before {
  content: "—";
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  color: var(--pitch-light);
}
.prose strong { font-weight: 700; color: var(--deep-pitch); }
.prose a { color: var(--pitch-mid); border-bottom: 1px solid rgba(43, 210, 255, .55); }
.prose a:hover { color: var(--deep-pitch); border-bottom-color: var(--orange); }
.section--dark .prose li::before { color: var(--green); }
.section--dark .prose a { color: var(--green); }

/* ---------- 19. 断点 ---------- */
@media (max-width: 1079.98px) {
  .nav-toggle { display: inline-flex; position: relative; z-index: 130; order: 3; }

  .site-nav {
    position: fixed;
    top: calc(var(--header-h) + 1px);
    bottom: 0;
    left: 0;
    width: min(86vw, 340px);
    z-index: 120;
    padding: 20px 0 40px;
    overflow-y: auto;
    background-color: var(--charcoal);
    background-image: linear-gradient(180deg, #14161A 0%, #0E3B2E 100%);
    border-right: 1px solid rgba(55, 242, 160, .35);
    transform: translateX(-102%);
    transition: transform 200ms var(--ease);
  }
  .site-nav::before {
    content: "全站索引 / INDEX";
    display: block;
    padding: 0 20px 14px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--line-invert);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .16em;
    color: rgba(43, 210, 255, .82);
  }
  .site-nav[data-open] { transform: translateX(0); }
  .site-nav__list { flex-direction: column; gap: 0; }
  .site-nav__item { display: block; }
  .site-nav__link {
    height: auto;
    padding: 15px 20px;
    border-left: 2px solid transparent;
    border-bottom: 1px solid var(--line-invert);
    font-size: 16px;
    color: rgba(246, 243, 236, .78);
  }
  .site-nav__link::after { display: none; }
  .site-nav__link:hover, .site-nav__link[aria-current="page"] { background: rgba(55, 242, 160, .1); }
  .site-nav__link[aria-current="page"] { border-left-color: var(--blue); }
  .site-nav__idx { font-size: 12px; }

  html[data-nav-open="true"] { overflow: hidden; }
}

@media (max-width: 1023.98px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-main, .col-aside, .col-wide, .col-narrow { grid-column: 1 / -1; }
}

@media (max-width: 719.98px) {
  .header-status { display: none; }
  .site-nav { order: 4; }
}

@media (min-width: 720px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-col--brand { grid-column: 1 / -1; }
}

@media (min-width: 1040px) {
  .footer-grid { grid-template-columns: 1.4fr .9fr .9fr 1.25fr; gap: 0; }
  .footer-col--brand { grid-column: auto; }
  .footer-col {
    border-left: 1px solid var(--line-invert);
    padding-inline: clamp(16px, 2vw, 28px);
  }
  .footer-col:first-child { border-left: 0; padding-left: 0; }
  .footer-col:last-child { padding-right: 0; }
}

@media (min-width: 1080px) {
  .site-nav__list { justify-content: flex-start; }
}

@media (max-width: 1199.98px) {
  .brand__tagline { display: none; }
}

/* ---------- 20. 无障碍动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .card:hover, .btn:hover, .card--float:hover, .card--tilt:hover { transform: none; }
}