/* ==========================================================================
   亚美体育 · yamei-arena.com.cn
   共享样式 /assets/site.css —— 赛场数据控制室 × 战术板
   结构：重置 / 变量 / 中文排版 / 头部 / 页脚 / 通用组件 / 响应式 / 动效降级
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 172px;
  overflow-x: clip;
}

body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, pre { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }
img, svg, video { display: block; max-width: 100%; }
table { border-collapse: collapse; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩节奏：深墨底 → 暖纸面 → 红黄语义 → 荧光青状态 */
  --ink: #0B1520;
  --ink-deep: #05080D;
  --panel: #14273F;
  --paper: #F2E9DA;
  --paper-shade: #D9CDB6;
  --red: #D8232A;
  --yellow: #F2B300;
  --cyan: #35E0C8;
  --grey: #8B99A8;
  --line: #C6CFD8;

  --gutter: clamp(16px, 4vw, 40px);
  --shell: 1280px;

  --frame: 2px solid var(--line);
  --hairline: 1px solid rgba(198, 207, 216, 0.24);
  --hard-shadow: 6px 6px 0 var(--ink-deep);
  --hard-shadow-sm: 4px 4px 0 var(--ink-deep);

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --step-fast: 0.12s linear;
  --step-mid: 0.18s linear;
}

/* ---------- 3. 中文排版基线 ---------- */
body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.01em;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 页面外框：导航即边框 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  border: 2px solid rgba(198, 207, 216, 0.34);
  pointer-events: none;
  z-index: 80;
}

::selection { background: var(--yellow); color: var(--ink); }

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

/* ---------- 4. 布局与版式工具 ---------- */
.shell {
  width: min(var(--shell), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(26px, 4vw, 48px); }
.section--panel { background: var(--panel); }
.section--paper { background: var(--paper); color: var(--ink); }
.section--paper .lede { color: #4a4438; }
.section--paper .eyebrow { color: var(--red); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 22px;
  padding-bottom: 14px;
  margin-bottom: clamp(20px, 3vw, 36px);
  border-bottom: var(--frame);
}

.divider {
  height: 2px;
  border: 0;
  background: var(--line);
  opacity: 0.55;
  margin-block: clamp(20px, 3vw, 38px);
}

.cut-slant {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 48px), 0 100%);
}

.display-1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 88%;
  font-size: clamp(40px, 8.5vw, 96px);
  line-height: 0.96;
  letter-spacing: -0.03em;
}

.display-2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 88%;
  font-size: clamp(28px, 4.6vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.display-3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.lede {
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.85;
  color: var(--line);
  max-width: 36em;
}

.prose { max-width: 36em; }
.prose p + p { margin-top: 1.05em; }
.prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; }

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

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

.label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink);
  font-weight: 800;
  font-size: 14px;
  border: 2px solid var(--ink-deep);
  transition: top var(--step-fast);
}
.skip-link:focus { top: 14px; }

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink);
  border-bottom: var(--frame);
  transition: box-shadow var(--step-fast);
}
.site-header[data-scrolled] { box-shadow: 0 4px 0 rgba(5, 8, 13, 0.85); }

.site-header__inner {
  position: relative;
  display: flex;
  flex-direction: column;
}

/* 6.1 状态播报条 */
.statusbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 18px;
  padding: 7px 0;
  border-bottom: 1px solid rgba(198, 207, 216, 0.28);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grey);
}
.statusbar__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.statusbar__pulse {
  width: 8px;
  height: 8px;
  background: var(--cyan);
  animation: status-pulse 2.4s linear infinite;
}
@keyframes status-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(53, 224, 200, 0.55); }
  70%  { box-shadow: 0 0 0 8px rgba(53, 224, 200, 0); }
  100% { box-shadow: 0 0 0 0 rgba(53, 224, 200, 0); }
}
.statusbar__key { color: var(--grey); }
.statusbar__val { color: var(--paper); }
.statusbar__dot { opacity: 0.5; }
.statusbar__cta {
  padding: 3px 10px;
  color: var(--paper);
  border: 1px solid var(--red);
  background: rgba(216, 35, 42, 0.18);
  letter-spacing: 0.16em;
  transition: background-color var(--step-fast), color var(--step-fast);
}
.statusbar__cta:hover { background: var(--red); color: #fff; }

/* 6.2 品牌牌面 */
.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 24px;
  padding: 14px 0 12px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
}
.brand__mark {
  display: flex;
  align-items: flex-start;
  gap: 4px;
}
.brand__mark i {
  display: block;
  width: 11px;
  height: 17px;
  background: var(--red);
  border: 1px solid var(--ink-deep);
  transform: rotate(-9deg);
}
.brand__mark i:last-child {
  background: var(--yellow);
  transform: rotate(7deg);
}
.brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 88%;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1;
  letter-spacing: -0.03em;
}
.brand__slogan {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--grey);
}
.masthead__tag {
  margin-left: auto;
  padding-left: 12px;
  border-left: 2px solid var(--yellow);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grey);
}

/* 6.3 移动端栏目索引按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 14px;
  background: var(--panel);
  color: var(--paper);
  border: 2px solid var(--line);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  transition: background-color var(--step-fast), color var(--step-fast), border-color var(--step-fast);
}
.nav-toggle:hover { background: var(--red); border-color: var(--red); color: #fff; }
.nav-toggle[aria-expanded="true"] { background: var(--cyan); border-color: var(--cyan); color: var(--ink); }
.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}
.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: currentColor;
}
.nav-toggle__label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; }

/* 6.4 栏目索引（框架式导航） */
.site-nav { border-top: var(--frame); }
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
}
.site-nav__item {
  display: flex;
  flex: 1 1 auto;
  border-right: 1px solid rgba(198, 207, 216, 0.22);
}
.site-nav__item:first-child { border-left: 1px solid rgba(198, 207, 216, 0.22); }
.site-nav__link {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 9px;
  width: 100%;
  padding: 11px 14px;
  color: var(--line);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-bottom: 3px solid transparent;
  transition: background-color var(--step-fast), color var(--step-fast), border-color var(--step-fast);
}
.site-nav__link:hover {
  background: var(--panel);
  color: var(--paper);
  border-bottom-color: var(--yellow);
}
.site-nav__link[aria-current="page"] {
  background: rgba(53, 224, 200, 0.1);
  color: var(--paper);
  border-bottom-color: var(--cyan);
}
.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--grey);
}
.site-nav__link[aria-current="page"] .site-nav__idx { color: var(--cyan); }
.site-nav__text { white-space: nowrap; }

/* 6.5 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 3px;
  background: rgba(198, 207, 216, 0.18);
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.08s linear;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  border-top: var(--frame);
}
.site-footer__stripe {
  height: 8px;
  background: linear-gradient(
    90deg,
    var(--red) 0 18%,
    var(--yellow) 18% 30%,
    var(--cyan) 30% 36%,
    var(--panel) 36% 100%
  );
}
.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr) minmax(0, 1.2fr);
  gap: clamp(28px, 4vw, 48px);
  padding-block: clamp(36px, 5vw, 64px);
}

.footer-brand__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 88%;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  letter-spacing: -0.03em;
}
.footer-brand__slogan {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--yellow);
}
.footer-brand__note {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--grey);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.footer-col__title,
.footer-contact__title {
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(198, 207, 216, 0.28);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer-col__list {
  display: grid;
  gap: 9px;
  margin-top: 14px;
}
.footer-col__link {
  display: inline-block;
  padding-left: 0;
  border-left: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--line);
  transition: color var(--step-fast), padding-left var(--step-fast), border-color var(--step-fast);
}
.footer-col__link:hover {
  padding-left: 8px;
  border-left-color: var(--cyan);
  color: var(--cyan);
}

.footer-contact__list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}
.footer-contact__row { display: grid; gap: 2px; }
.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey);
}
.footer-contact__val {
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
}
.footer-contact__val.mono { font-size: 13px; }

.site-footer__legal {
  display: grid;
  gap: 6px;
  padding-block: 18px 26px;
  border-top: 1px solid rgba(198, 207, 216, 0.22);
  font-size: 12px;
  color: var(--grey);
}
.site-footer__copy {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}
.site-footer__icp {
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--line);
}

/* ---------- 8. 通用组件 ---------- */
/* 8.1 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  background: transparent;
  color: var(--paper);
  border: 2px solid var(--line);
  box-shadow: var(--hard-shadow-sm);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: transform var(--step-fast), box-shadow var(--step-fast),
              background-color var(--step-fast), color var(--step-fast), border-color var(--step-fast);
}
.btn:hover,
.btn:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--hard-shadow);
}
.btn--red { background: var(--red); border-color: var(--red); color: #fff; }
.btn--yellow { background: var(--yellow); border-color: var(--yellow); color: var(--ink); }
.btn--ghost { background: transparent; border-color: var(--line); color: var(--paper); }

/* 8.2 红黄牌语义标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 9px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}
.tag--red { background: var(--red); border-color: var(--red); color: #fff; }
.tag--yellow { background: var(--yellow); border-color: var(--yellow); color: var(--ink); }
.tag--cyan { background: var(--cyan); border-color: var(--cyan); color: var(--ink); }
.tag--grey { background: transparent; border-color: var(--grey); color: var(--grey); }

/* 8.3 面板与纸面卡片 */
.panel {
  padding: clamp(18px, 3vw, 28px);
  background: var(--panel);
  border: var(--frame);
  box-shadow: var(--hard-shadow);
}
.card {
  position: relative;
  padding: clamp(18px, 3vw, 26px);
  background: var(--paper);
  color: var(--ink);
  border: 2px solid var(--ink-deep);
  box-shadow: var(--hard-shadow);
}
.card--ink {
  background: var(--panel);
  color: var(--paper);
  border-color: var(--line);
}
.card__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 88%;
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

/* 8.4 比分牌式指标 */
.metric {
  padding: 14px 16px;
  background: var(--ink-deep);
  border: 2px solid var(--line);
  border-left: 6px solid var(--red);
}
.metric--yellow { border-left-color: var(--yellow); }
.metric--cyan { border-left-color: var(--cyan); }
.metric__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.metric__label {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--grey);
}

/* 8.5 数据表 */
.table-wrap {
  overflow-x: auto;
  background: var(--panel);
  border: var(--frame);
}
.data-table {
  width: 100%;
  min-width: 560px;
  font-size: 14px;
}
.data-table th,
.data-table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(198, 207, 216, 0.22);
}
.data-table thead th {
  background: var(--paper-shade);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.data-table tbody tr:hover { background: rgba(53, 224, 200, 0.08); }
.data-table td.num { text-align: right; }

/* 8.6 可展开内容组 */
.fold {
  margin-bottom: -2px;
  background: var(--panel);
  border: var(--frame);
}
.fold[open] { border-left: 6px solid var(--cyan); }
.fold__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}
.fold__summary::-webkit-details-marker { display: none; }
.fold__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
}
.fold[open] .fold__summary::after { content: "–"; }
.fold__body {
  padding: 0 18px 18px;
  color: var(--line);
  line-height: 1.85;
}
.fold__body p + p { margin-top: 12px; }

/* 8.7 图片容器（页面阶段放图 / CSS 图形） */
.media {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: var(--frame);
  box-shadow: var(--hard-shadow);
}
.media img,
.media svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x5 { aspect-ratio: 4 / 5; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--21x9 { aspect-ratio: 21 / 9; }
.media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 12px;
  background: var(--ink-deep);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}
.media__tag {
  position: absolute;
  top: 10px;
  left: 10px;
}

/* 8.8 网格 */
.grid {
  display: grid;
  gap: clamp(16px, 3vw, 30px);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); }
.grid--sidebar { grid-template-columns: minmax(0, 240px) minmax(0, 1fr); }

/* 8.9 面包屑 */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--grey);
}
.breadcrumbs a { color: var(--line); transition: color var(--step-fast); }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs__sep { opacity: 0.6; }

/* 8.10 显现协议 */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.28s linear, transform 0.28s linear;
}
[data-reveal="in"] {
  opacity: 1;
  transform: none;
}

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1080px) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 148px; }

  .nav-toggle { display: inline-flex; }
  .masthead__tag { display: none; }

  .site-nav {
    display: none;
    max-height: calc(100vh - 150px);
    overflow-y: auto;
    border-top: 1px solid rgba(198, 207, 216, 0.3);
  }
  .site-header[data-open] .site-nav { display: block; }

  .site-nav__list { flex-direction: column; }
  .site-nav__item {
    flex: none;
    border-right: 0;
    border-bottom: 1px solid rgba(198, 207, 216, 0.2);
  }
  .site-nav__item:first-child { border-left: 0; }
  .site-nav__link {
    justify-content: space-between;
    padding: 15px 6px;
    font-size: 17px;
  }

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

  .grid--2,
  .grid--3,
  .grid--split,
  .grid--sidebar { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 620px) {
  body::before { border-width: 2px; }
  .statusbar {
    justify-content: flex-start;
    gap: 6px 12px;
    letter-spacing: 0.1em;
  }
  .statusbar__cta { margin-left: 0; }
  .footer-nav { grid-template-columns: minmax(0, 1fr); }
  .brand__slogan { letter-spacing: 0.22em; }
}

/* ---------- 10. 动效降级 ---------- */
@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;
  }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .scroll-progress__bar { transition: none; }
}