/* ==========================================================================
   人生就是搏 · 夜间赛场数据站
   共享样式 /assets/site.css —— reset / 变量 / 中文排版 / 头部 / 页脚 / 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, figcaption, blockquote, dl, dd { margin: 0; }

ul, ol { padding: 0; list-style: none; }

img, svg, video, canvas { display: block; max-width: 100%; height: auto; }

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; }

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; width: 100%; }

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

/* ---------- 2. 变量 ---------- */
:root {
  /* 品牌色 */
  --ink: #071C16;
  --moss: #0E3B2E;
  --lime: #B8FF3F;
  --amber: #FFB03A;
  --steel: #8FA6B2;
  --paper: #F4F0E6;
  --stone: #263330;
  --clay: #B86B4B;
  --night: #04100D;

  /* 语义色 */
  --fg: var(--paper);
  --muted: #A7BDB4;
  --line: rgba(244, 240, 230, 0.16);
  --line-strong: rgba(244, 240, 230, 0.34);

  /* 字体 */
  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", SFMono-Regular, ui-monospace, Menlo, Consolas, monospace;

  /* 尺寸 */
  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 48px);
  --header-h: 72px;

  /* 阴影 */
  --shadow-hard: 6px 6px 0 rgba(4, 16, 13, 0.55);
  --shadow-lift: 10px 12px 0 rgba(4, 16, 13, 0.62);
}

/* ---------- 3. 基础与中文排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--fg);
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 560px at 82% -12%, rgba(184, 255, 63, 0.09), transparent 62%),
    radial-gradient(900px 520px at 4% 6%, rgba(14, 59, 46, 0.9), transparent 68%),
    repeating-linear-gradient(0deg, rgba(143, 166, 178, 0.045) 0 1px, transparent 1px 96px);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--paper);
  text-wrap: balance;
}

h1 { font-size: clamp(2.4rem, 5.6vw, 4.4rem); }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.85rem); }
h3 { font-size: clamp(1.2rem, 1.9vw, 1.55rem); }
h4 { font-size: 1.05rem; letter-spacing: 0.04em; }

p { text-wrap: pretty; }

::selection {
  background: var(--lime);
  color: var(--night);
}

#main-content {
  display: block;
  scroll-margin-top: calc(var(--header-h) + 16px);
}

/* ---------- 4. 工具类 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: 860px;
  margin-inline: auto;
}

.mono,
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.text-lime { color: var(--lime); }
.text-amber { color: var(--amber); }

.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;
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--lime);
  color: var(--night);
  font-weight: 700;
  font-size: 0.9rem;
  border: 2px solid var(--night);
  box-shadow: 4px 4px 0 rgba(4, 16, 13, 0.8);
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* ---------- 6. 站点头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: linear-gradient(180deg, rgba(7, 28, 22, 0.97) 0%, rgba(7, 28, 22, 0.68) 100%);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 2px solid transparent;
  transition: background 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.site-header.is-scrolled {
  background: var(--ink);
  border-bottom-color: var(--lime);
  box-shadow: 0 14px 34px rgba(4, 16, 13, 0.65);
}

/* 顶部数据带 */
.site-header__strip {
  overflow: hidden;
  max-height: 44px;
  background: linear-gradient(90deg, rgba(184, 255, 63, 0.12), rgba(184, 255, 63, 0) 62%);
  border-bottom: 1px solid var(--line);
  transition: max-height 0.3s ease, opacity 0.24s ease;
}

.site-header.is-scrolled .site-header__strip {
  max-height: 0;
  opacity: 0;
  border-bottom-color: transparent;
}

.site-header__strip-inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 7px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
}

.header-strip__note {
  color: var(--steel);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-strip__utils {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.header-strip__dot {
  width: 5px;
  height: 5px;
  display: inline-block;
  background: var(--lime);
  transform: rotate(45deg);
}

.nav-util {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--steel);
  padding: 4px 0;
  border-bottom: 1px dashed transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-util:hover,
.nav-util:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* 主导航条 */
.site-header__inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding-block: 6px;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  background: var(--lime);
  color: var(--night);
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1;
  border: 2px solid var(--night);
  box-shadow: 4px 4px 0 rgba(4, 16, 13, 0.75);
  transform: skewX(-8deg);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.brand:hover .brand__mark {
  transform: skewX(-8deg) translate(-1px, -1px);
  box-shadow: 6px 6px 0 rgba(4, 16, 13, 0.85);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.02rem, 1.5vw, 1.28rem);
  letter-spacing: 0.08em;
  color: var(--paper);
}

.brand__line {
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--steel);
}

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
  gap: clamp(6px, 1vw, 16px);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 0.6vw, 8px);
}

.nav-list__item { display: flex; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 9px 11px;
  font-size: 0.93rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: rgba(244, 240, 230, 0.78);
  border: 1px solid transparent;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 3px;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease;
}

.nav-link:hover {
  color: var(--paper);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--night);
  background: var(--lime);
  border-color: var(--night);
  font-weight: 700;
  box-shadow: 3px 3px 0 rgba(4, 16, 13, 0.8);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(0);
}

.site-nav__meta {
  display: none;
  flex-direction: column;
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  margin-top: 12px;
}

.site-nav__cta {
  align-self: flex-start;
  margin-top: 4px;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: clamp(6px, 1vw, 16px);
  flex: 0 0 auto;
}

/* 移动索引按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 2px solid var(--line-strong);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.nav-toggle:hover {
  border-color: var(--lime);
  color: var(--lime);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 20px;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--lime);
  transition: transform 0.24s ease;
}

.site-header[data-open="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
}

.site-header[data-open="true"] .nav-toggle__bar:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 3px;
  background: transparent;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--lime) 0%, var(--amber) 100%);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 2px solid var(--paper);
  background: transparent;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1.3;
  text-align: center;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease,
              color 0.18s ease, border-color 0.18s ease;
}

.btn--sm {
  padding: 8px 14px;
  font-size: 0.83rem;
}

.btn--lime {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--night);
  box-shadow: 5px 5px 0 rgba(4, 16, 13, 0.72);
}

.btn--lime:hover,
.btn--lime:focus-visible {
  background: #CBFF6B;
  transform: translate(-1px, -1px);
  box-shadow: 7px 7px 0 rgba(4, 16, 13, 0.85);
}

.btn--ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--paper);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  background: rgba(184, 255, 63, 0.08);
}

/* ---------- 8. 站点页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background-color: var(--night);
  background-image:
    repeating-linear-gradient(90deg, rgba(184, 255, 63, 0.06) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(143, 166, 178, 0.06) 0 1px, transparent 1px 88px);
  color: var(--paper);
  border-top: 2px solid var(--line-strong);
}

/* 反馈色带 */
.footer-feedback {
  background: var(--lime);
  color: var(--night);
  border-bottom: 3px solid var(--night);
}

.footer-feedback__inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px 24px;
  flex-wrap: wrap;
}

.footer-feedback__text {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--night);
}

.footer-feedback__hint {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: rgba(4, 16, 13, 0.72);
}

.footer-feedback .btn--ghost {
  border-color: var(--night);
  color: var(--night);
  font-weight: 700;
}

.footer-feedback .btn--ghost:hover,
.footer-feedback .btn--ghost:focus-visible {
  background: var(--night);
  color: var(--lime);
  border-color: var(--night);
}

/* 主体三栏 */
.site-footer__inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(34px, 5.5vw, 62px) var(--gutter) clamp(26px, 4vw, 42px);
  display: grid;
  grid-template-columns: minmax(220px, 1.05fr) minmax(0, 1.75fr) minmax(220px, 1fr);
  gap: clamp(26px, 4vw, 56px);
}

.footer-brand__top {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand .brand__mark {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  font-size: 1.15rem;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--paper);
}

.footer-brand__note {
  margin-top: 14px;
  max-width: 32ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

.footer-brand__stamp {
  margin-top: 16px;
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: rgba(143, 166, 178, 0.75);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 32px);
}

.footer-col__title {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--lime);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.footer-col__title::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 28px;
  height: 2px;
  background: var(--lime);
}

.footer-list li + li {
  margin-top: 8px;
}

.footer-link {
  display: inline-block;
  font-size: 0.92rem;
  color: rgba(244, 240, 230, 0.82);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.footer-link--inline {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--steel);
  margin-left: 14px;
}

.footer-contact__list {
  display: grid;
  gap: 12px;
}

.footer-contact__item {
  display: grid;
  gap: 2px;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: rgba(143, 166, 178, 0.85);
}

.footer-contact__value {
  font-size: 0.92rem;
  color: var(--paper);
  word-break: break-word;
}

/* 页脚底条 */
.footer-bottom {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 16px var(--gutter) 26px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 20px;
  font-size: 0.78rem;
  color: var(--steel);
}

.footer-copy {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.footer-copy__year {
  font-family: var(--font-mono);
  color: var(--paper);
}

.footer-legal {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 0;
}

.footer-icp {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--steel);
}

/* ---------- 9. 章节与面板 ---------- */
.section {
  padding-block: clamp(40px, 7vw, 88px);
}

.section--tight {
  padding-block: clamp(22px, 3.6vw, 46px);
}

.section-head {
  display: grid;
  gap: 12px;
  max-width: 64ch;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--lime);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--lime);
  flex: 0 0 26px;
}

.panel {
  position: relative;
  background: var(--moss);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
  padding: clamp(20px, 3.2vw, 36px);
}

.panel--night {
  background: var(--night);
  border-color: var(--line);
}

.panel--paper {
  background: var(--paper);
  color: var(--stone);
  border-color: var(--stone);
  box-shadow: 8px 8px 0 rgba(4, 16, 13, 0.35);
}

.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding-bottom: 10px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--line-strong);
}

.panel--paper .panel__head {
  border-bottom-color: rgba(38, 51, 48, 0.28);
}

/* ---------- 10. 数据卡 / 标签 ---------- */
.data-card {
  position: relative;
  display: block;
  padding: 18px 20px 20px;
  background: var(--moss);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.data-card:hover {
  transform: translateY(-2px);
  border-color: var(--lime);
  box-shadow: var(--shadow-lift);
}

.data-card__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--steel);
}

.data-card__value {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 3.2vw, 2.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--lime);
}

.data-card__value--amber { color: var(--amber); }

.data-card__note {
  margin-top: 8px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 2px solid var(--line-strong);
  background: rgba(184, 255, 63, 0.07);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  line-height: 1.4;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.tag--lime { background: var(--lime); border-color: var(--lime); color: var(--night); }
.tag--amber { background: var(--amber); border-color: var(--amber); color: var(--night); }
.tag--clay { background: var(--clay); border-color: var(--clay); color: var(--paper); }
.tag--steel { background: transparent; border-color: var(--steel); color: var(--steel); }

/* ---------- 11. 面包屑 ---------- */
.breadcrumbs {
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--steel);
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumbs__item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: rgba(143, 166, 178, 0.55);
}

.breadcrumbs__link {
  color: var(--steel);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.breadcrumbs__current {
  color: var(--paper);
}

/* ---------- 12. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--aside { grid-template-columns: minmax(0, 2fr) minmax(240px, 1fr); }

/* ---------- 13. 正文容器 ---------- */
.prose {
  max-width: 68ch;
  font-size: clamp(1rem, 0.6vw + 0.9rem, 1.06rem);
  line-height: 1.85;
  color: rgba(244, 240, 230, 0.87);
}

.prose > * + * { margin-top: 1.05em; }

.prose h2,
.prose h3 {
  margin-top: 1.8em;
  line-height: 1.18;
  color: var(--paper);
}

.prose h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }
.prose h3 { font-size: clamp(1.14rem, 1.7vw, 1.35rem); }

.prose ul { padding-left: 0; }

.prose ul li {
  position: relative;
  padding-left: 20px;
}

.prose ul li + li { margin-top: 0.5em; }

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 2px;
  background: var(--lime);
}

.prose a {
  color: var(--lime);
  border-bottom: 1px solid rgba(184, 255, 63, 0.45);
}

.prose a:hover { border-bottom-color: var(--lime); }

.prose strong {
  font-weight: 600;
  color: var(--paper);
}

.prose blockquote {
  border-left: 4px solid var(--amber);
  padding: 6px 0 6px 18px;
  color: var(--paper);
  font-size: 1.05em;
}

.prose--paper {
  color: rgba(38, 51, 48, 0.9);
}

.prose--paper h2,
.prose--paper h3,
.prose--paper strong { color: var(--stone); }

.prose--paper a {
  color: #1F5A3E;
  border-bottom-color: rgba(31, 90, 62, 0.4);
}

.prose--paper ul li::before { background: var(--clay); }

/* ---------- 14. 图片容器基础 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--night);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}

.media > img,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media--field { aspect-ratio: 21 / 9; }

.media--paper {
  border-color: var(--stone);
  box-shadow: 6px 6px 0 rgba(38, 51, 48, 0.22);
}

.media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 7px 12px;
  background: rgba(4, 16, 13, 0.86);
  border-top: 2px solid var(--lime);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
}

.media--placeholder::after {
  content: attr(data-label);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 12px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: rgba(244, 240, 230, 0.55);
  background:
    repeating-linear-gradient(135deg, rgba(184, 255, 63, 0.08) 0 10px, transparent 10px 20px),
    radial-gradient(circle at 50% 50%, rgba(14, 59, 46, 0.9), var(--night) 78%);
}

/* ---------- 15. 分隔 ---------- */
.rule {
  height: 2px;
  border: 0;
  background: var(--line-strong);
  margin-block: clamp(22px, 3.4vw, 40px);
}

.rule--lime {
  width: 68px;
  height: 3px;
  background: var(--lime);
  margin-block: 0;
}

/* ---------- 16. 显现动效 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1120px) and (min-width: 901px) {
  .nav-link {
    padding: 9px 8px;
    font-size: 0.86rem;
  }
  .brand__line { display: none; }
}

@media (max-width: 1024px) {
  .site-footer__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  :root { --header-h: 64px; }

  .site-header__strip { display: none; }

  .site-header__inner {
    min-height: var(--header-h);
    gap: 10px;
  }

  .brand__mark {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
    font-size: 1.2rem;
    box-shadow: 3px 3px 0 rgba(4, 16, 13, 0.75);
  }

  .brand__line { display: none; }

  .site-header__cta { display: none; }

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

  .site-header__actions { margin-left: auto; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    padding: 14px var(--gutter) 22px;
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
    background: var(--ink);
    border-top: 2px solid var(--lime);
    border-bottom: 2px solid var(--lime);
    box-shadow: 0 26px 44px rgba(4, 16, 13, 0.72);
  }

  .site-header[data-open="true"] .site-nav {
    display: flex;
    animation: nav-drop 0.24s ease both;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    display: block;
    padding: 14px 12px;
    font-size: 1rem;
    border-bottom: 1px solid var(--line);
    color: rgba(244, 240, 230, 0.86);
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    box-shadow: none;
    border-color: var(--lime);
    border-bottom: 1px solid var(--lime);
  }

  .site-nav__meta { display: flex; }

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

@keyframes nav-drop {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 640px) {
  .site-footer__inner { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-link--inline { margin-left: 0; margin-right: 14px; }
}

@media (max-width: 420px) {
  .brand__name { font-size: 1rem; }
  .nav-toggle__label { display: none; }
  .footer-feedback__hint { display: block; }
}

/* ---------- 18. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .brand:hover .brand__mark,
  .data-card:hover,
  .btn:hover { transform: none; }
}