/* ============================================================
   维基体育 · 共享样式 /assets/site.css
   1 重置 · 2 变量 · 3 排版 · 4 布局 · 5 头部 · 6 页脚
   7 按钮与胶囊 · 8 面包屑与正文 · 9 组件 · 10 状态与响应式
   ============================================================ */

/* ---------- 1 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol { margin: 0; }

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

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

button {
  font: inherit;
  color: inherit;
  background: 0 0;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

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

main { display: block; }

/* ---------- 2 变量 ---------- */
:root {
  --ink-950: #07140F;
  --ink-900: #0B1F17;
  --ink-800: #123326;
  --ink-700: #1B4A36;
  --lime-400: #C8FF3D;
  --lime-200: #E6FF9B;
  --orange-500: #FF6A2B;
  --orange-200: #FFC2A3;
  --chalk: #F4F8F1;
  --turf: #8FA396;
  --black: #0A0D0B;
  --cyan: #6FE3D2;

  --font-display: "Oswald", "Barlow Condensed", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "Roboto Mono", "SFMono-Regular", monospace;

  --wrap: 1240px;
  --gutter: clamp(16px, 4.4vw, 40px);
  --gap: clamp(16px, 2vw, 24px);

  --r-lg: 28px;
  --r-md: 18px;
  --r-pill: 999px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 104px;
}

/* ---------- 3 基础排版 ---------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--ink-950);
  background-image:
    radial-gradient(120% 78% at 84% -12%, rgba(200, 255, 61, 0.1), transparent 62%),
    radial-gradient(92% 62% at -6% 4%, rgba(255, 106, 43, 0.07), transparent 58%);
  background-repeat: no-repeat;
  color: var(--chalk);
  font-family: var(--font-body);
  font-size: clamp(16px, 0.45vw + 14.8px, 18px);
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.015em;
}

.display-1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 7vw, 96px);
  line-height: 0.95;
  letter-spacing: -0.02em;
}

.display-2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 56px);
  line-height: 1;
  letter-spacing: -0.02em;
}

.display-3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--lime-400);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: currentColor;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.04em;
}

.lede {
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.65;
  color: rgba(244, 248, 241, 0.86);
}

.muted { color: var(--turf); }

::selection {
  background: var(--lime-400);
  color: var(--ink-950);
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

#main-content:focus { outline: none; }

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

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}

.section--900 { background: var(--ink-900); }
.section--800 { background: var(--ink-800); }

.page-top {
  padding-top: calc(var(--header-h) + clamp(28px, 5vw, 64px));
}

.grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

.stack {
  display: grid;
  gap: var(--gap);
}

/* ---------- 5 头部 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  background: var(--lime-400);
  color: var(--ink-950);
  font-size: 14px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform 0.22s var(--ease);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  color: var(--chalk);
  background-color: transparent;
  background-image: linear-gradient(180deg, rgba(7, 20, 15, 0.92) 0%, rgba(7, 20, 15, 0.46) 58%, rgba(7, 20, 15, 0) 100%);
  border-bottom: 1px solid transparent;
  transition: background-color 0.24s ease, border-color 0.24s ease;
}

.site-header[data-scrolled],
.site-header[data-open] {
  background-color: var(--ink-900);
  background-image: none;
  border-bottom-color: var(--ink-700);
}

/* 状态栏 */
.header-rail {
  border-bottom: 1px solid rgba(27, 74, 54, 0.45);
  transition: border-color 0.24s ease;
}

.site-header[data-scrolled] .header-rail,
.site-header[data-open] .header-rail {
  border-bottom-color: rgba(27, 74, 54, 0.9);
}

.rail-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 34px;
}

.rail-index {
  flex: 0 0 auto;
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--turf);
}

.rail-status {
  display: flex;
  align-items: center;
  gap: 9px;
  flex: 1 1 auto;
  min-width: 0;
  font-size: 12px;
  line-height: 1.4;
  color: rgba(244, 248, 241, 0.78);
}

.rail-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime-400);
  box-shadow: 0 0 0 3px rgba(200, 255, 61, 0.18);
}

.rail-text {
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.rail-link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime-400);
  padding-bottom: 1px;
  border-bottom: 1px solid rgba(200, 255, 61, 0.35);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.rail-link:hover {
  color: var(--lime-200);
  border-bottom-color: var(--lime-200);
}

/* 主栏 */
.header-bar { position: relative; }

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 66px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-800), var(--ink-950));
  border: 1px solid var(--ink-700);
}

.brand-mark::before {
  content: "";
  position: absolute;
  left: -8px;
  bottom: 7px;
  width: 40px;
  height: 3px;
  background: var(--lime-400);
  transform: rotate(-38deg);
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: 6px;
  right: 6px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange-500);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--turf);
}

/* 导航 */
.site-nav { margin-inline: auto; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  counter-reset: navitem;
}

.nav-list > li > a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 12px;
  border-radius: var(--r-pill);
  font-size: 14.5px;
  font-weight: 500;
  color: rgba(244, 248, 241, 0.82);
  transition: color 0.18s ease, background-color 0.18s ease;
}

.nav-list > li > a::before {
  counter-increment: navitem;
  content: counter(navitem, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  color: var(--turf);
  transition: color 0.18s ease;
}

.nav-list > li > a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  background: var(--lime-400);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s var(--ease);
}

.nav-list > li > a:hover {
  color: var(--chalk);
  background: rgba(200, 255, 61, 0.08);
}

.nav-list > li > a:hover::after { transform: scaleX(1); }

.nav-list > li > a[aria-current="page"] { color: var(--lime-400); }

.nav-list > li > a[aria-current="page"]::before { color: var(--lime-400); }

.nav-list > li > a[aria-current="page"]::after { transform: scaleX(1); }

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

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--ink-700);
  font-size: 13px;
  font-weight: 700;
  color: var(--chalk);
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.nav-toggle:hover { border-color: var(--lime-400); }

.nav-toggle[data-open] {
  color: var(--lime-400);
  border-color: var(--lime-400);
  background: rgba(200, 255, 61, 0.1);
}

.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle-bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.24s var(--ease), opacity 0.2s ease;
}

.nav-toggle[data-open] .nav-toggle-bars span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.nav-toggle[data-open] .nav-toggle-bars span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

.nav-toggle-label { font-size: 13px; }

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  width: 100%;
  height: 2px;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--lime-400) 0%, var(--lime-200) 38%, var(--orange-500) 100%);
  transition: transform 0.1s linear;
}

/* ---------- 6 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  padding-top: clamp(44px, 6vw, 80px);
  color: var(--chalk);
  background-color: var(--ink-900);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(27, 74, 54, 0.35) 0 1px,
    transparent 1px 120px
  );
  border-top: 1px solid var(--ink-700);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.5fr) minmax(0, 0.85fr);
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--ink-700);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.footer-summary {
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 248, 241, 0.74);
}

.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(200, 255, 61, 0.35);
  color: var(--lime-400);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.footer-status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime-400);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2.5vw, 32px);
}

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

.footer-col-title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(27, 74, 54, 0.85);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--turf);
}

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

.footer-links a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14.5px;
  color: rgba(244, 248, 241, 0.78);
  transition: color 0.18s ease, transform 0.18s var(--ease);
}

.footer-links a:hover {
  color: var(--lime-400);
  transform: translateX(3px);
}

.footer-contact {
  display: grid;
  gap: 14px;
  align-content: start;
}

.contact-row {
  display: grid;
  gap: 3px;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--turf);
}

.contact-value {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--chalk);
  word-break: break-word;
}

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

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px 32px;
  padding-block: 24px 8px;
}

.footer-note {
  max-width: 58ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--turf);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--turf);
}

.footer-legal span { white-space: nowrap; }

.footer-wordmark {
  margin-top: clamp(18px, 3vw, 34px);
  font-family: var(--font-display);
  font-size: clamp(56px, 15vw, 180px);
  font-weight: 900;
  line-height: 0.78;
  letter-spacing: -0.03em;
  white-space: nowrap;
  color: transparent;
  -webkit-text-stroke: 1px rgba(27, 74, 54, 0.95);
  user-select: none;
  pointer-events: none;
}

/* ---------- 7 按钮与胶囊 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: transform 0.18s var(--ease), background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--lime-400);
  color: var(--ink-950);
}

.btn-primary:hover { background: var(--lime-200); }

.btn-orange {
  background: var(--orange-500);
  color: var(--ink-950);
}

.btn-orange:hover { background: var(--orange-200); }

.btn-ghost {
  border-color: var(--ink-700);
  color: var(--chalk);
}

.btn-ghost:hover {
  border-color: var(--lime-400);
  color: var(--lime-400);
}

.btn-sm {
  padding: 10px 18px;
  font-size: 14px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  border: 1px solid var(--ink-700);
  background: rgba(18, 51, 38, 0.7);
  color: var(--chalk);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.4;
}

.pill--lime {
  background: var(--lime-400);
  border-color: transparent;
  color: var(--ink-950);
}

.pill--orange {
  background: rgba(255, 106, 43, 0.1);
  border-color: rgba(255, 106, 43, 0.45);
  color: var(--orange-500);
}

.pill--cyan {
  background: rgba(111, 227, 210, 0.08);
  border-color: rgba(111, 227, 210, 0.4);
  color: var(--cyan);
}

/* ---------- 8 面包屑与正文 ---------- */
.crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--turf);
}

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

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

.crumbs li + li::before {
  content: "/";
  color: var(--ink-700);
}

.crumbs a { color: var(--turf); transition: color 0.18s ease; }
.crumbs a:hover { color: var(--lime-400); }
.crumbs [aria-current="page"] { color: var(--chalk); }

.prose {
  max-width: 72ch;
}

.prose p + p { margin-top: 1.1em; }

.prose h2 {
  margin-top: 2em;
  margin-bottom: 0.7em;
  font-size: clamp(24px, 2.6vw, 34px);
}

.prose h3 {
  margin-top: 1.6em;
  margin-bottom: 0.5em;
  font-size: clamp(19px, 2vw, 24px);
}

.prose a {
  color: var(--lime-400);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(200, 255, 61, 0.45);
}

.prose a:hover { text-decoration-color: var(--lime-400); }

.prose ul,
.prose ol {
  display: grid;
  gap: 0.5em;
  margin-top: 1em;
}

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

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 2px;
  background: var(--lime-400);
}

/* ---------- 9 组件 ---------- */
.panel {
  padding: clamp(20px, 3vw, 32px);
  border-radius: var(--r-lg);
  background: var(--ink-800);
}

.panel--line {
  border: 1px solid var(--ink-700);
  background: transparent;
}

.media-frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 120% at 18% 0%, rgba(200, 255, 61, 0.18), transparent 55%),
    linear-gradient(160deg, var(--ink-800), var(--ink-950));
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    linear-gradient(90deg, rgba(27, 74, 54, 0.55) 1px, transparent 1px),
    linear-gradient(0deg, rgba(27, 74, 54, 0.55) 1px, transparent 1px);
  background-size: 48px 48px;
}

.media-frame img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--ink-700);
  border-radius: var(--r-md);
}

.data-table {
  min-width: 560px;
  font-size: 15px;
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(27, 74, 54, 0.7);
}

.data-table th {
  background: rgba(18, 51, 38, 0.6);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--turf);
}

.data-table tbody tr { transition: background-color 0.16s ease; }
.data-table tbody tr:hover { background: rgba(200, 255, 61, 0.06); }
.data-table tbody tr:last-child td { border-bottom: 0; }

.data-table .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

/* 问答 / 展开组 */
.qa {
  border-bottom: 1px solid var(--ink-700);
}

.qa-trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  text-align: left;
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--chalk);
  transition: color 0.18s ease;
}

.qa-trigger:hover { color: var(--lime-400); }

.qa-icon {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--ink-700);
  transition: transform 0.26s var(--ease), background-color 0.2s ease, border-color 0.2s ease;
}

.qa-icon::before,
.qa-icon::after {
  content: "";
  position: absolute;
  inset: 50% 6px auto;
  height: 1.5px;
  background: var(--lime-400);
  transform: translateY(-50%);
}

.qa-icon::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform 0.26s var(--ease);
}

.qa[data-open] .qa-icon {
  background: var(--lime-400);
  border-color: var(--lime-400);
}

.qa[data-open] .qa-icon::before,
.qa[data-open] .qa-icon::after { background: var(--ink-950); }

.qa[data-open] .qa-icon::after { transform: translateY(-50%) rotate(0deg); }

.qa-panel {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows 0.26s var(--ease), visibility 0.26s linear;
}

.qa[data-open] .qa-panel {
  grid-template-rows: 1fr;
  visibility: visible;
}

.qa-panel-inner {
  overflow: hidden;
  min-height: 0;
  color: rgba(244, 248, 241, 0.82);
}

.qa-panel-inner > * {
  max-width: 72ch;
  padding-bottom: 20px;
}

/* 显现协议 */
[data-reveal-init] {
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

[data-reveal-init]:not([data-revealed]) {
  opacity: 0;
  transform: translateY(16px);
}

/* ---------- 10 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .header-actions { margin-left: auto; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 3;
    margin: 0;
    padding: 10px var(--gutter) 20px;
    background: var(--ink-900);
    border-bottom: 1px solid var(--ink-700);
    box-shadow: 0 28px 52px -30px rgba(0, 0, 0, 0.95);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.24s var(--ease), transform 0.24s var(--ease), visibility 0.24s linear;
  }

  .site-nav[data-open] {
    visibility: visible;
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

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

  .nav-list > li + li { border-top: 1px solid rgba(27, 74, 54, 0.6); }

  .nav-list > li > a {
    width: 100%;
    justify-content: flex-start;
    gap: 12px;
    padding: 15px 6px;
    border-radius: 0;
    font-size: 16px;
    color: var(--chalk);
  }

  .nav-list > li > a::after { display: none; }

  .nav-list > li > a:hover { background: rgba(200, 255, 61, 0.06); }

  .nav-list > li > a[aria-current="page"] { background: rgba(200, 255, 61, 0.1); }
}

@media (max-width: 960px) {
  .footer-top { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  .span-3, .span-4, .span-5 { grid-column: span 6; }
  .span-7, .span-8 { grid-column: span 12; }
}

@media (max-width: 720px) {
  :root { --header-h: 92px; }

  .header-inner { min-height: 58px; gap: 12px; }
  .rail-inner { min-height: 30px; gap: 10px; }
  .rail-status { font-size: 11px; }
  .brand-name { font-size: 17px; }

  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-meta { flex-direction: column; }
}

@media (max-width: 600px) {
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-12 {
    grid-column: span 12;
  }
}

@media (max-width: 420px) {
  .brand-sub { display: none; }
  .nav-toggle-label { display: none; }
  .rail-index { display: none; }
  .rail-link { font-size: 10px; }
  .header-actions { gap: 8px; }
  .btn-sm { padding: 9px 14px; font-size: 13px; }
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
}

/* 减少动态 */
@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;
    transition-delay: 0ms !important;
  }

  [data-reveal-init],
  [data-reveal-init]:not([data-revealed]) {
    opacity: 1;
    transform: none;
  }

  .scroll-progress { transition: none; }
}