/* ==========================================================================
   UC赛场 · 共享站点样式 /assets/site.css
   深空蓝基底 + 荧光绿数据流 + 琥珀橙提示灯 / 粗边框硬阴影 / 非对称画布
   ========================================================================== */

/* ---------- 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, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
}

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

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

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

table { border-collapse: collapse; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-900: #0A1A2F;
  --ink-800: #0E2440;
  --ink-700: #142E4F;
  --ink-600: #2A3F56;
  --neon: #00E676;
  --neon-soft: #7CFFB2;
  --amber: #FFAB00;
  --paper: #E9F1F7;
  --mist: #8FA6B8;
  --alert: #FF5C4D;

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", Impact, "Arial Narrow", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace;

  --wrap: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-h: 74px;

  --line: 2px solid var(--ink-700);
  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, 0.45);
  --shadow-neon: 6px 6px 0 rgba(0, 230, 118, 0.22);
  --shadow-amber: 6px 6px 0 rgba(255, 171, 0, 0.20);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.nav-open { overflow: hidden; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--neon);
  text-decoration: none;
  transition: color 0.16s ease;
}

a:hover {
  color: var(--neon-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

strong, b { font-weight: 700; color: var(--paper); }

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

::selection {
  background: var(--neon);
  color: #04180c;
}

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

#main-content { padding-top: var(--header-h); }
#main-content.flush-top { padding-top: 0; }

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

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

.section--line { border-top: var(--line); }

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 32px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--split-rev { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

/* ---------- 5. 文本组件 ---------- */
.display-1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.2vw, 92px);
  line-height: 0.94;
  letter-spacing: -0.045em;
  color: var(--paper);
  margin: 0 0 0.35em;
}

.h-section {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 0 0.4em;
}

.h-sub {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1.3;
  letter-spacing: 0;
  margin: 0 0 0.5em;
}

.lede {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.75;
  color: #C7D6E3;
  max-width: 62ch;
  margin-bottom: 1.1em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
}

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

.serif-note {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.65;
  color: var(--paper);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
}

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

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: -0.01em;
  line-height: 1;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 0;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease,
              background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translate(-1px, -1px);
}

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

.btn--primary {
  background-color: var(--neon);
  border-color: var(--neon);
  color: #04180C;
  box-shadow: 4px 4px 0 rgba(0, 230, 118, 0.25);
}

.btn--primary:hover {
  background-color: var(--neon-soft);
  border-color: var(--neon-soft);
  color: #04180C;
  box-shadow: 5px 5px 0 rgba(0, 230, 118, 0.35);
}

.btn--amber {
  background-color: var(--amber);
  border-color: var(--amber);
  color: #221600;
  box-shadow: 4px 4px 0 rgba(255, 171, 0, 0.22);
}

.btn--amber:hover {
  background-color: #FFC046;
  border-color: #FFC046;
  color: #221600;
  box-shadow: 5px 5px 0 rgba(255, 171, 0, 0.32);
}

.btn--ghost {
  background-color: transparent;
  border-color: var(--ink-600);
  color: var(--paper);
}

.btn--ghost:hover {
  border-color: var(--neon);
  color: var(--neon);
  box-shadow: 4px 4px 0 rgba(0, 230, 118, 0.18);
}

/* ---------- 7. 面板 ---------- */
.panel {
  position: relative;
  background-color: var(--ink-800);
  border: var(--line);
  padding: clamp(16px, 2vw, 26px);
  box-shadow: var(--shadow-hard);
}

.panel--neon {
  border-color: var(--neon);
  box-shadow: var(--shadow-neon);
}

.panel--amber {
  border-color: var(--amber);
  box-shadow: var(--shadow-amber);
}

.panel--flush {
  padding: 0;
  overflow: hidden;
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: var(--line);
}

.panel-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- 8. 标签与数据点 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.5;
  border: 1px solid var(--ink-600);
  background-color: rgba(255, 255, 255, 0.03);
  color: var(--mist);
}

.tag--neon {
  background-color: var(--neon);
  border-color: var(--neon);
  color: #04180C;
}

.tag--amber {
  background-color: var(--amber);
  border-color: var(--amber);
  color: #221600;
}

.tag--outline-neon {
  background-color: transparent;
  border-color: var(--neon);
  color: var(--neon);
}

.data-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  background-color: rgba(10, 26, 47, 0.82);
  border: 1px solid var(--neon);
  color: var(--neon);
}

/* ---------- 9. 指标块 ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--neon);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- 10. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.crumbs li + li::before {
  content: "/";
  color: var(--ink-600);
}

.crumbs a { color: var(--mist); }
.crumbs a:hover { color: var(--neon); text-decoration: none; }
.crumbs [aria-current="page"] { color: var(--paper); }

/* ---------- 11. 表格 ---------- */
.table-scroll {
  position: relative;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  border: var(--line);
  background-color: var(--ink-800);
  box-shadow: inset -22px 0 20px -22px rgba(0, 0, 0, 0.9),
              inset 22px 0 20px -22px rgba(0, 0, 0, 0.9);
}

.scroll-hint {
  display: block;
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.data-table {
  width: 100%;
  min-width: 560px;
  font-size: 15px;
}

.data-table caption {
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.data-table th,
.data-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--ink-700);
  vertical-align: middle;
}

.data-table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background-color: var(--ink-700);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

.data-table tbody tr:nth-child(even) { background-color: rgba(20, 46, 79, 0.35); }
.data-table tbody tr:hover { background-color: rgba(0, 230, 118, 0.09); }
.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;
  color: var(--paper);
}

.data-table [data-current] { box-shadow: inset 3px 0 0 var(--neon); }

/* ---------- 12. 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background-color: var(--ink-700);
  border: var(--line);
}

.media > img,
.media > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.05);
}

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

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 26, 47, 0) 45%, rgba(10, 26, 47, 0.86) 100%);
  pointer-events: none;
}

.media--plain::after { display: none; }

.media-data {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px;
}

.media-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 13. 筛选组件 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background-color: transparent;
  border: 2px solid var(--ink-600);
  border-radius: 0;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  transition: border-color 0.16s ease, color 0.16s ease,
              background-color 0.16s ease, box-shadow 0.16s ease;
}

.filter-btn:hover {
  border-color: var(--neon);
  color: var(--neon);
}

.filter-btn[aria-pressed="true"] {
  background-color: var(--neon);
  border-color: var(--neon);
  color: #04180C;
  box-shadow: 4px 4px 0 rgba(0, 230, 118, 0.22);
}

.filter-count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11.5px;
  padding: 1px 6px;
  background-color: rgba(255, 255, 255, 0.14);
  color: inherit;
}

.filter-btn[aria-pressed="true"] .filter-count { background-color: rgba(0, 0, 0, 0.22); }

[data-filter-item][hidden] { display: none; }

[data-filter-item] { animation: filterIn 0.18s ease both; }

@keyframes filterIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 14. 显现动效协议 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ---------- 15. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  top: -80px;
  left: 12px;
  z-index: 200;
  padding: 10px 16px;
  background-color: var(--neon);
  border: 2px solid var(--neon);
  color: #04180C;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15px;
  text-decoration: none;
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 12px;
  color: #04180C;
  text-decoration: none;
}

/* ---------- 16. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  background-color: transparent;
  background-image: linear-gradient(
    180deg,
    rgba(10, 26, 47, 0.92) 0%,
    rgba(10, 26, 47, 0.62) 58%,
    rgba(10, 26, 47, 0) 100%
  );
  border-bottom: 2px solid transparent;
  transition: background-color 0.24s ease, border-color 0.24s ease,
              box-shadow 0.24s ease, backdrop-filter 0.24s ease;
}

.site-header[data-scrolled] {
  background-color: rgba(10, 26, 47, 0.97);
  background-image: none;
  border-bottom: 2px solid var(--ink-700);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(6px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: var(--header-h);
  padding-block: 8px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--paper);
  text-decoration: none;
}

.brand:hover { color: var(--paper); text-decoration: none; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  background-color: var(--neon);
  color: #04180C;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  letter-spacing: -0.05em;
  line-height: 1;
  transform: skewX(-6deg);
  box-shadow: 4px 4px 0 rgba(0, 230, 118, 0.22);
}

.brand-text { display: block; }

.brand-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.brand-line {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

/* 状态条 */
.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--ink-700);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--mist);
  white-space: nowrap;
}

.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background-color: var(--neon);
  box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.18);
  animation: statusPulse 2.4s ease-in-out infinite;
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

/* 导航 */
.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.6vw, 22px);
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.2vw, 18px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--paper);
  text-decoration: none;
  white-space: nowrap;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 2px;
  height: 2px;
  background-color: var(--neon);
  transition: right 0.2s ease;
}

.nav-link:hover { color: var(--neon); text-decoration: none; }
.nav-link:hover::after,
.nav-link:focus-visible::after { right: 0; }

.nav-link[aria-current="page"] { color: var(--neon); }
.nav-link[aria-current="page"]::after { right: 0; background-color: var(--amber); }

.nav-cta { flex: 0 0 auto; }

/* 移动按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  background-color: var(--ink-800);
  border: 2px solid var(--ink-700);
  border-radius: 0;
  cursor: pointer;
}

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

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--paper);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child {
  transform: translateY(-7px) rotate(-45deg);
}

/* 滚动进度 */
.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  overflow: hidden;
  background-color: transparent;
}

.header-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--neon) 0%, var(--neon-soft) 55%, var(--amber) 100%);
  transition: transform 0.12s linear;
}

/* ---------- 17. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background-color: var(--ink-800);
  border-top: 2px solid var(--ink-700);
  color: var(--paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--neon) 0 22%,
    var(--amber) 22% 38%,
    var(--ink-700) 38% 100%
  );
}

.footer-top { padding-block: clamp(40px, 6vw, 72px); }

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 2fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.footer-brand { max-width: 40ch; }

.brand--footer .brand-mark { box-shadow: 4px 4px 0 rgba(255, 171, 0, 0.28); }

.footer-line {
  margin: 18px 0 0;
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.6;
  color: #C7D6E3;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.footer-col-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}

.footer-links {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-block;
  font-size: 15px;
  color: #C7D6E3;
  border-bottom: 2px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.footer-links a:hover {
  color: var(--neon);
  border-bottom-color: var(--neon);
  text-decoration: none;
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px 28px;
  margin-top: clamp(32px, 4vw, 52px);
  padding-top: 26px;
  border-top: 2px solid var(--ink-700);
}

.footer-contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.footer-contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.footer-contact-value {
  font-size: 15px;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-word;
}

a.footer-contact-value:hover {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-legal {
  border-top: 2px solid var(--ink-700);
  background-color: var(--ink-900);
  padding-block: 18px;
}

.footer-legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 26px;
  font-size: 12.5px;
  color: var(--mist);
}

.footer-icp {
  margin: 0;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.footer-meta { margin: 0; }

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1320px) {
  .header-status { display: none; }
}

@media (max-width: 1080px) {
  :root { --header-h: 68px; }

  .nav-toggle { display: flex; }

  .primary-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 55;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    padding: 14px var(--gutter) 26px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    background-color: var(--ink-800);
    border-top: 2px solid var(--ink-700);
    border-bottom: 2px solid var(--ink-700);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.55);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  }

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

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

  .nav-list li + li { border-top: 1px solid var(--ink-700); }

  .nav-link {
    display: block;
    padding: 14px 4px;
    font-size: 17px;
  }

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

  .nav-link[aria-current="page"] {
    padding-left: 14px;
    box-shadow: inset 3px 0 0 var(--amber);
  }

  .nav-cta {
    width: 100%;
    margin-top: 18px;
    padding-block: 14px;
  }
}

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--4,
  .grid--split,
  .grid--split-rev {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }

  .footer-contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
  :root { --header-h: 62px; }

  body { font-size: 15.5px; }

  .brand-name { font-size: 17px; }
  .brand-line { font-size: 9.5px; letter-spacing: 0.16em; }
  .brand-mark { width: 34px; height: 34px; font-size: 14px; }

  .footer-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-contact { grid-template-columns: minmax(0, 1fr); }

  .footer-legal-inner { flex-direction: column; align-items: flex-start; }

  .data-table { font-size: 14px; }
  .data-table th,
  .data-table td { padding: 9px 11px; }
}

/* ---------- 19. 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;
    scroll-behavior: auto !important;
  }

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

  .header-progress-bar { transition: none; }
}