/* ==========================================================================
   华体育赛场 · 共享外壳样式 /assets/site.css
   夜间球场数据指挥中心：深墨蓝底、电光青描边、荧光橙红数据、鎏金权益、奶油纸出版面
   ========================================================================== */

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

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

body,
h1, h2, h3, h4,
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 {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

a { color: inherit; }

input, textarea, select { font: inherit; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-deep: #061A2E;
  --ink-night: #0B2742;
  --cyan: #19E3FF;
  --flame: #FF4D2E;
  --gold: #D8A84E;
  --paper: #F2E8D5;
  --steel: #1B3A57;
  --mist: #A8CBDD;
  --char: #0A0F14;
  --coral: #FFB4A3;

  --line-cyan: rgba(25, 227, 255, 0.18);
  --line-soft: rgba(168, 203, 221, 0.16);
  --line-gold: rgba(216, 168, 78, 0.4);

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

  --gutter: clamp(16px, 4vw, 48px);
  --shell-max: 1280px;
  --radius-hard: 2px;
  --radius-pill: 999px;

  --dur: 260ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-deep);
  background-image:
    linear-gradient(rgba(25, 227, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 227, 255, 0.04) 1px, transparent 1px);
  background-size: 100% 96px, 96px 100%;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(15px, 0.55vw + 13px, 17px);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.04;
}

h1,
.display {
  font-size: clamp(56px, 7vw, 104px);
  line-height: 0.92;
  letter-spacing: -0.03em;
}

h2 { font-size: clamp(36px, 4.2vw, 56px); line-height: 1.02; }
h3 { font-size: clamp(20px, 1.6vw, 28px); line-height: 1.2; }

p { max-width: 72ch; }

.lead {
  font-size: clamp(17px, 1.2vw, 20px);
  line-height: 1.65;
  color: var(--mist);
  max-width: 68ch;
}

.prose { max-width: 70ch; }
.prose p + p { margin-top: 1.1em; }
.prose ul,
.prose ol {
  list-style: disc;
  padding-left: 1.4em;
  margin-top: 1em;
}
.prose li + li { margin-top: 0.5em; }

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 14px;
}

.rule {
  height: 1px;
  border: 0;
  background: var(--line-cyan);
}

.section { padding-block: clamp(48px, 7vw, 104px); }
.section--night { background: var(--ink-night); }
.section--steel { background: var(--steel); }
.section--paper { background: var(--paper); color: var(--ink-deep); }
.section--paper h1,
.section--paper h2,
.section--paper h3 { color: var(--ink-deep); }
.section--paper .lead { color: var(--steel); }
.section--paper .eyebrow { color: var(--flame); }
.section--paper .rule { background: rgba(6, 26, 46, 0.18); }

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

.split {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  grid-template-columns: 1fr;
  align-items: start;
}

.grid {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .split--5-7 { grid-template-columns: 5fr 7fr; }
  .split--4-8 { grid-template-columns: 4fr 8fr; }
}

@media (min-width: 1080px) {
  .grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
}

/* ---------- 5. 通用元素 ---------- */
a { text-decoration-thickness: 1px; text-underline-offset: 3px; }

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

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -80px;
  z-index: 300;
  padding: 12px 20px;
  background: var(--cyan);
  color: var(--ink-deep);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus { top: 14px; }

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

/* 按钮体系 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-hard);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

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

.btn--primary {
  background: var(--flame);
  color: #14060A;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.btn--primary:hover { background: #FF6A44; }

.btn--ghost {
  border-color: rgba(25, 227, 255, 0.5);
  color: var(--cyan);
  background: rgba(25, 227, 255, 0.06);
}

.btn--ghost:hover {
  background: rgba(25, 227, 255, 0.14);
  border-color: var(--cyan);
}

.btn--gold {
  border-color: var(--line-gold);
  color: var(--gold);
  background: linear-gradient(135deg, rgba(216, 168, 78, 0.2), rgba(216, 168, 78, 0.02));
}

.btn--gold:hover { border-color: var(--gold); background: rgba(216, 168, 78, 0.24); }

.btn--copy {
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: 0.1em;
  border-color: var(--line-cyan);
  color: var(--mist);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.breadcrumb__item { color: inherit; text-decoration: none; }
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(168, 203, 221, 0.45);
}
.breadcrumb__item:hover { color: var(--cyan); }
.breadcrumb__item[aria-current="page"] { color: var(--paper); }

/* 图片容器基础规则（页面阶段放占位或图片） */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background:
    linear-gradient(150deg, var(--ink-night), var(--steel));
  border: 1px solid var(--line-cyan);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(135deg, rgba(25, 227, 255, 0.07) 0 1px, transparent 1px 18px);
  pointer-events: none;
}

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

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--wide { aspect-ratio: 21 / 9; }

.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.section--paper .media { border-color: rgba(6, 26, 46, 0.2); }
.section--paper .media__caption { color: var(--steel); }

/* 数据组件 */
.data-figure {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.data-figure__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4vw, 64px);
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--flame);
}

.data-figure__unit {
  margin-left: 0.35em;
  font-size: 0.38em;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.data-figure__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.section--paper .data-figure__label { color: var(--steel); }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1.6;
}

.tag--cyan { color: var(--cyan); }
.tag--flame { color: var(--flame); }
.tag--gold { color: var(--gold); }

/* 显现 */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}

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

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(6, 26, 46, 0.92);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid var(--line-cyan);
}

.header-utility {
  max-height: 56px;
  overflow: hidden;
  background: rgba(10, 15, 20, 0.7);
  border-bottom: 1px solid rgba(25, 227, 255, 0.1);
  transition: max-height 300ms var(--ease), opacity 220ms var(--ease), padding 300ms var(--ease), border-color 220ms var(--ease);
}

.header-utility__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 9px;
}

.header-utility__note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  text-transform: uppercase;
}

.utility-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.utility-nav__link {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.utility-nav__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.site-header[data-scrolled] .header-utility {
  max-height: 0;
  opacity: 0;
  padding-block: 0;
  border-bottom-color: transparent;
}

.header-dock__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  padding-block: 15px;
  transition: padding var(--dur) var(--ease);
}

.site-header[data-scrolled] .header-dock__inner { padding-block: 9px; }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex: none;
}

.brand__mark {
  width: 38px;
  height: 38px;
  flex: none;
  background: linear-gradient(140deg, var(--cyan), var(--flame));
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  box-shadow: inset 0 0 0 1px rgba(25, 227, 255, 0.55);
}

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

.brand__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.05em;
  line-height: 1.1;
  color: var(--paper);
}

.brand__line {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

/* 胶囊导航 */
.site-nav {
  margin-inline: auto;
  padding: 5px;
  background: var(--ink-night);
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__link {
  display: block;
  padding: 9px 15px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.site-nav__link:hover {
  color: var(--paper);
  background: rgba(25, 227, 255, 0.1);
}

.site-nav__link--wide {
  padding-inline: 26px;
  font-weight: 600;
  color: var(--paper);
  background: linear-gradient(90deg, rgba(255, 77, 46, 0.22), rgba(255, 77, 46, 0) 78%);
  box-shadow: inset 2px 0 0 var(--flame);
}

.site-nav__link--wide:hover {
  background: linear-gradient(90deg, rgba(255, 77, 46, 0.32), rgba(255, 77, 46, 0.04) 78%);
}

.site-nav__link[aria-current="page"] {
  color: var(--ink-deep);
  background: var(--cyan);
  font-weight: 600;
  box-shadow: 0 0 0 1px rgba(25, 227, 255, 0.6), 0 6px 18px rgba(25, 227, 255, 0.22);
}

/* CTA */
.header-cta {
  flex: none;
  padding: 11px 20px;
  background: var(--flame);
  color: #14060A;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.header-cta:hover {
  background: #FF6A44;
  transform: translateY(-1px);
}

/* 移动按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex: none;
  background: rgba(11, 39, 66, 0.85);
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-hard);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

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

.nav-toggle__box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 20px;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--flame));
}

/* ---------- 7. 响应式头部 ---------- */
@media (max-width: 1140px) {
  .site-nav__link { padding: 9px 11px; font-size: 13px; }
  .site-nav__link--wide { padding-inline: 18px; }
  .brand__line { display: none; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; margin-left: auto; }

  .header-dock__inner { padding-block: 12px; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 8px);
    margin-inline: 0;
    padding: 10px;
    border-radius: 16px;
    background: var(--ink-deep);
    border: 1px solid rgba(25, 227, 255, 0.24);
    box-shadow: 0 28px 64px rgba(0, 0, 0, 0.6);
    display: none;
  }

  .site-nav[data-open] { display: block; }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .site-nav__link {
    padding: 13px 16px;
    border-radius: 10px;
    font-size: 15px;
  }

  .site-nav__link--wide {
    padding-inline: 16px;
    box-shadow: inset 3px 0 0 var(--flame);
  }

  .header-cta { margin-left: 0; order: 3; }
}

@media (max-width: 620px) {
  .header-utility__inner {
    flex-wrap: wrap;
    gap: 4px 14px;
    padding-block: 7px;
  }

  .header-utility__note { font-size: 10px; }
  .utility-nav { gap: 14px; }
  .utility-nav__link { font-size: 11px; }

  .brand__name { font-size: 17px; }
  .brand__mark { width: 32px; height: 32px; }

  .header-cta {
    font-size: 12px;
    padding: 9px 14px;
  }
}

@media (max-width: 460px) {
  .header-cta { display: none; }
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--ink-deep);
  border-top: 1px solid var(--line-cyan);
}

.footer-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  grid-template-columns: 1fr;
  padding-block: clamp(44px, 6vw, 80px);
}

@media (min-width: 700px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1040px) {
  .footer-grid {
    grid-template-columns: 1.7fr 0.9fr 0.9fr 0.9fr 1.5fr;
    align-items: start;
  }
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 800;
  letter-spacing: 0.03em;
  line-height: 1;
  color: var(--paper);
}

.footer-brand__line {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.footer-brand__cta {
  display: inline-flex;
  align-items: center;
  margin-top: 20px;
  padding: 10px 18px;
  border: 1px solid var(--line-gold);
  color: var(--gold);
  background: linear-gradient(135deg, rgba(216, 168, 78, 0.18), rgba(216, 168, 78, 0.02));
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-brand__cta:hover {
  background: rgba(216, 168, 78, 0.26);
  border-color: var(--gold);
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 16px;
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col__link {
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.footer-col__link:hover {
  color: var(--cyan);
  padding-left: 5px;
}

.footer-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-all;
}

.footer-contact__item + .footer-contact__item { margin-top: 10px; }

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
  padding: 2px 7px;
  border: 1px solid var(--line-soft);
}

.footer-contact__note {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 12px;
  line-height: 1.8;
  color: var(--mist);
}

.copy-btn {
  padding: 3px 9px;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.copy-btn:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(25, 227, 255, 0.1);
}

.copy-btn[data-copied] {
  color: var(--ink-deep);
  background: var(--cyan);
  border-color: var(--cyan);
}

.copy-btn__label { pointer-events: none; }

.footer-bottom {
  background: var(--char);
  border-top: 1px solid rgba(25, 227, 255, 0.12);
}

.footer-bottom__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 18px;
}

.footer-bottom__legal {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.footer-bottom__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-bottom__link {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  text-decoration: none;
}

.footer-bottom__link:hover { color: var(--cyan); }

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-hard);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.to-top:hover {
  background: var(--cyan);
  color: var(--ink-deep);
  border-color: var(--cyan);
}

/* ---------- 9. 减少动态偏好 ---------- */
@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;
  }

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