/* ============================================================
   YUN赛场 · 共享样式表  /assets/site.css
   负责：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件 / 网格
   ============================================================ */

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

:root {
  /* 场地色阶 */
  --c-field: #04140F;
  --c-stand: #0A221A;
  --c-net: #123A2E;
  --c-pulse: #2BF5C8;
  --c-ice: #DFFFF3;
  --c-grey: #7C9C90;
  --c-strike: #FF5A3C;
  --c-amber: #FFC24B;
  --c-ink: #010806;

  --c-pulse-08: rgba(43, 245, 200, 0.08);
  --c-pulse-18: rgba(43, 245, 200, 0.18);
  --c-pulse-40: rgba(43, 245, 200, 0.40);
  --c-strike-14: rgba(255, 90, 60, 0.14);

  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Cascadia Mono", "Liberation Mono", monospace;

  --shell: 1320px;
  --gutter: 20px;
  --radius: 2px;
  --line: 1px solid var(--c-net);
  --ease: cubic-bezier(.2, .6, .2, 1);
}

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

body {
  margin: 0;
  background: var(--c-field);
  color: var(--c-ice);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { display: block; }

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

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--c-ice);
}

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

ul, ol { margin: 0; padding: 0; }

a {
  color: var(--c-pulse);
  text-decoration: none;
  transition: color 120ms var(--ease);
}
a:hover { color: var(--c-ice); }

button { font: inherit; }

.num,
.stat-value,
.data-table .num,
[data-year] {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

:focus-visible {
  outline: 2px solid var(--c-pulse);
  outline-offset: 2px;
}

.shell {
  width: min(var(--shell), 100% - (var(--gutter) * 2));
  margin-inline: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  top: -64px;
  left: 12px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--c-pulse);
  color: var(--c-field);
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: top 140ms var(--ease);
}
.skip-link:focus {
  top: 10px;
  color: var(--c-field);
}

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: relative;
  z-index: 60;
  background: var(--c-field);
  border-bottom: var(--line);
}

.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 200;
  pointer-events: none;
  background: transparent;
}
.scroll-progress > span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--c-pulse);
  transform: scaleX(0);
  transform-origin: left center;
}

/* 上层：品牌说明带 */
.header-utility {
  background: var(--c-ink);
  border-bottom: 1px solid var(--c-net);
}
.utility-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 34px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-grey);
}
.brand-line {
  margin: 0;
  min-width: 0;
  color: var(--c-grey);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.edition-tag {
  flex: 0 0 auto;
  padding: 1px 8px;
  border: 1px solid var(--c-pulse-40);
  color: var(--c-pulse);
  line-height: 1.7;
  white-space: nowrap;
}
.utility-nav {
  margin-left: auto;
  display: flex;
  gap: 18px;
  flex: 0 0 auto;
}
.utility-nav a {
  color: var(--c-grey);
  letter-spacing: 0.16em;
}
.utility-nav a:hover { color: var(--c-pulse); }

/* 中层：品牌与快捷入口 */
.header-main { background: var(--c-field); }
.header-main-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 0 12px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--c-ice);
  min-width: 0;
}
.brand:hover { color: var(--c-ice); }
.brand-mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 30px);
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--c-pulse);
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 30px);
  letter-spacing: -0.02em;
  line-height: 1;
}
.brand-sub {
  display: none;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-grey);
}

.quick-access {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--c-pulse-40);
  color: var(--c-pulse);
  font-size: 13px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: background-color 140ms var(--ease), color 140ms var(--ease), border-color 140ms var(--ease);
}
.quick-access:hover {
  background: var(--c-pulse);
  border-color: var(--c-pulse);
  color: var(--c-field);
}
.quick-access-label--short { display: none; }
.quick-access-arrow { font-family: var(--font-mono); line-height: 1; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--c-net);
  color: var(--c-ice);
  font-size: 12px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color 120ms var(--ease), color 120ms var(--ease);
}
.nav-toggle:hover { border-color: var(--c-pulse); color: var(--c-pulse); }
.nav-toggle[aria-expanded="true"] {
  border-color: var(--c-pulse);
  color: var(--c-pulse);
}
.nav-toggle-bars {
  position: relative;
  width: 18px;
  height: 11px;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: currentColor;
}
.nav-toggle-bars::before {
  top: 0;
  box-shadow: 0 5px 0 currentColor;
}
.nav-toggle-bars::after { bottom: 0; }
.nav-toggle-text { line-height: 1; }

/* 下层：轨道式栏目导航 */
.header-nav {
  display: block;
  background: var(--c-stand);
  border-top: var(--line);
  border-bottom: var(--line);
}
.header-nav .shell {
  display: flex;
  align-items: center;
  gap: 26px;
}
.primary-nav { flex: 1 1 auto; min-width: 0; }
.primary-nav ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
}
.primary-nav li { border-left: var(--line); }
.primary-nav li:last-child { border-right: var(--line); }
.primary-nav a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 18px;
  color: var(--c-ice);
  transition: color 120ms var(--ease), background-color 120ms var(--ease), box-shadow 120ms var(--ease);
}
.primary-nav a:hover {
  color: var(--c-pulse);
  background: var(--c-pulse-08);
}
.primary-nav a[aria-current="page"] {
  color: var(--c-pulse);
  background: var(--c-pulse-08);
  box-shadow: inset 0 -2px 0 var(--c-pulse);
}
.nav-index {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--c-grey);
}
.primary-nav a[aria-current="page"] .nav-index { color: var(--c-pulse); }
.nav-label { font-size: 15px; letter-spacing: 0.02em; }
.nav-footnote {
  display: none;
  margin: 0;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-grey);
  white-space: nowrap;
}

@media (min-width: 1240px) {
  .nav-footnote { display: block; }
}
@media (min-width: 720px) {
  .brand-sub { display: inline; }
}
@media (max-width: 1080px) {
  .primary-nav a { padding: 12px 12px; }
  .nav-index { display: none; }
}
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .nav-footnote { display: none; }
  .header-nav { display: none; }
  .header-nav[data-open] { display: block; }
  .header-nav .shell { display: block; }
  .primary-nav ul { flex-direction: column; }
  .primary-nav li {
    border-left: 0;
    border-bottom: var(--line);
  }
  .primary-nav li:last-child {
    border-right: 0;
    border-bottom: 0;
  }
  .primary-nav a { padding: 14px 4px; }
  .nav-index { display: inline; }
  .header-nav[data-open] .primary-nav a:hover { background: var(--c-pulse-08); }
}
@media (max-width: 560px) {
  .edition-tag { display: none; }
  .utility-inner { gap: 10px; font-size: 11px; }
  .quarterly { display: none; }
  .quick-access { padding: 8px 10px; font-size: 12px; gap: 7px; }
  .quick-access-label--full { display: none; }
  .quick-access-label--short { display: inline; }
  .header-main-inner { gap: 10px; padding: 12px 0 10px; }
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: var(--c-ink);
  border-top: 1px solid var(--c-net);
  color: var(--c-grey);
  font-size: 14px;
}
.footer-inner { padding: 52px 0 22px; }

.footer-lead {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px 16px;
  padding-bottom: 20px;
  border-bottom: var(--line);
}
.footer-brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 40px);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--c-ice);
}
.footer-tagline {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-grey);
}

.footer-nav {
  padding: 22px 0;
  border-bottom: var(--line);
}
.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
}
.footer-links > li {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 14px;
}
.footer-group-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-grey);
}
.footer-links a {
  position: relative;
  color: var(--c-ice);
  font-size: 14px;
}
.footer-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1px;
  background: var(--c-pulse);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 120ms var(--ease);
}
.footer-links a:hover { color: var(--c-pulse); }
.footer-links a:hover::after { transform: scaleX(1); }

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  padding: 20px 0;
  border-bottom: var(--line);
}
.footer-contact-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  font-size: 13px;
}
.footer-contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-grey);
  flex: 0 0 auto;
}
.copy-value { color: var(--c-ice); }
.copy-btn {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 0;
  background: none;
  border: 0;
  border-bottom: 1px dashed var(--c-net);
  color: var(--c-ice);
  font-family: inherit;
  font-size: 13px;
  line-height: 1.6;
  cursor: pointer;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}
.copy-btn:hover {
  color: var(--c-pulse);
  border-bottom-color: var(--c-pulse-40);
}
.copy-status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-amber);
}
.copy-btn[data-copied="true"] .copy-status { color: var(--c-pulse); }

.footer-note {
  margin: 18px 0 0;
  max-width: 68ch;
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--c-grey);
}

.footer-meta {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-grey);
}
.footer-meta a { color: var(--c-grey); }
.footer-meta a:hover { color: var(--c-pulse); }
.footer-legal {
  display: flex;
  gap: 18px;
  margin-left: auto;
}

/* ============================================================
   通用按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid var(--c-pulse);
  background: var(--c-pulse);
  color: var(--c-field);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 140ms var(--ease), color 140ms var(--ease), border-color 140ms var(--ease);
}
.btn:hover {
  background: transparent;
  color: var(--c-pulse);
}
.btn-ghost {
  background: transparent;
  border-color: var(--c-net);
  color: var(--c-ice);
}
.btn-ghost:hover {
  background: var(--c-pulse-08);
  border-color: var(--c-pulse);
  color: var(--c-pulse);
}
.btn-strike {
  background: var(--c-strike);
  border-color: var(--c-strike);
  color: var(--c-ink);
}
.btn-strike:hover {
  background: transparent;
  color: var(--c-strike);
}

/* ============================================================
   面包屑 / 正文容器
   ============================================================ */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-grey);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
}
.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-net);
}
.breadcrumb a { color: var(--c-grey); }
.breadcrumb a:hover { color: var(--c-pulse); }
.breadcrumb [aria-current="page"] { color: var(--c-ice); }

.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--c-ice);
}
.prose > :first-child { margin-top: 0; }
.prose h2 {
  margin: 2em 0 0.6em;
  font-size: clamp(22px, 2.6vw, 32px);
}
.prose h3 {
  margin: 1.6em 0 0.5em;
  font-size: 19px;
}
.prose ul, .prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.3em;
}
.prose li { margin-bottom: 0.4em; }
.prose strong { color: var(--c-pulse); font-weight: 700; }
.prose hr {
  height: 1px;
  border: 0;
  background: var(--c-net);
  margin: 2em 0;
}

/* ============================================================
   布局骨架
   ============================================================ */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}
@media (min-width: 1024px) {
  .layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 40px;
  }
}
.rail {
  background: var(--c-stand);
  border: var(--line);
  border-top: 2px solid var(--c-pulse);
  padding: 18px;
}
.content-column { min-width: 0; }

.section {
  padding: 56px 0;
  border-top: var(--line);
}
.section:first-child { border-top: 0; }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px 28px;
  margin-bottom: 28px;
}
.eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-pulse);
}
.section-title {
  font-size: clamp(28px, 4vw, 56px);
}
.section-note {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-grey);
}

/* ============================================================
   基础组件
   ============================================================ */
.panel {
  background: var(--c-stand);
  border: var(--line);
  padding: 20px;
}

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: minmax(0, 1fr); }
.grid-3 { grid-template-columns: minmax(0, 1fr); }
@media (min-width: 720px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1080px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.auto-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.stat {
  background: var(--c-stand);
  border: var(--line);
  border-left: 2px solid var(--c-pulse);
  padding: 14px 16px;
}
.stat-value {
  display: block;
  font-size: clamp(28px, 3.6vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--c-ice);
}
.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-grey);
}
.stat[data-accent="strike"] { border-left-color: var(--c-strike); }
.stat[data-accent="strike"] .stat-value { color: var(--c-strike); }
.stat[data-accent="amber"] { border-left-color: var(--c-amber); }

.chip-track {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}
.chip {
  flex: 0 0 auto;
  padding: 7px 14px;
  border: 1px solid var(--c-net);
  background: transparent;
  color: var(--c-ice);
  font-size: 13px;
  letter-spacing: 0.06em;
  line-height: 1.4;
  cursor: pointer;
  transition: background-color 120ms var(--ease), color 120ms var(--ease), border-color 120ms var(--ease);
}
.chip:hover {
  border-color: var(--c-pulse);
  color: var(--c-pulse);
}
.chip[aria-pressed="true"],
.chip.is-active {
  background: var(--c-pulse);
  border-color: var(--c-pulse);
  color: var(--c-field);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.data-table th,
.data-table td {
  padding: 12px 14px;
  border-bottom: var(--line);
  text-align: left;
  vertical-align: baseline;
}
.data-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--c-grey);
  border-bottom: 1px solid var(--c-pulse-40);
  white-space: nowrap;
}
.data-table tbody tr:hover { background: var(--c-pulse-08); }
.data-table .num {
  text-align: right;
  color: var(--c-ice);
}

.index-list {
  list-style: none;
  counter-reset: idx;
}
.index-list > li { border-top: var(--line); }
.index-list > li:last-child { border-bottom: var(--line); }
.index-list a {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 4px;
  color: var(--c-ice);
  transition: color 120ms var(--ease), background-color 120ms var(--ease), padding-left 120ms var(--ease);
}
.index-list a:hover {
  color: var(--c-pulse);
  background: var(--c-pulse-08);
  padding-left: 12px;
}
.index-num {
  flex: 0 0 auto;
  min-width: 34px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--c-grey);
}

.label {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--c-net);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  line-height: 1.6;
  color: var(--c-grey);
}
.label--pulse {
  border-color: var(--c-pulse-40);
  color: var(--c-pulse);
}
.label--strike {
  border-color: rgba(255, 90, 60, 0.5);
  color: var(--c-strike);
  background: var(--c-strike-14);
}

/* 图片容器：共享头尾不放图，页面阶段把图片放进 .media-frame */
.media-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: var(--line);
  background:
    linear-gradient(160deg, var(--c-stand) 0%, var(--c-field) 62%);
}
.media-frame img,
.media-frame video,
.media-frame canvas,
.media-frame svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 160ms var(--ease);
  background-image:
    linear-gradient(var(--c-pulse-18) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-pulse-18) 1px, transparent 1px);
  background-size: 33.333% 33.333%;
}
.media-frame--grid::after { opacity: 1; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-caption {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-grey);
}

/* ---------- 进入视口显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   响应式与无障碍
   ============================================================ */
@media (max-width: 600px) {
  :root { --gutter: 14px; }
  body { font-size: 15.5px; }
  .section { padding: 40px 0; }
  .footer-inner { padding: 40px 0 20px; }
  .footer-legal { margin-left: 0; }
}

@media (min-width: 1400px) {
  body { font-size: 17px; }
}

@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;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  .scroll-progress > span { transition: none; }
}