/* =========================================================
   火博体育站 · 共享样式 /assets/site.css
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 176px;
}

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

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

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

button { font: inherit; color: inherit; background: none; border: 0; }

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

table { border-collapse: collapse; }

:root {
  --ink: #1B1A18;
  --cream: #F8F1E4;
  --paper: #E5D6BE;
  --ember: #E8481C;
  --gold: #F2A93B;
  --forest: #123B33;
  --moss: #2F6B5B;
  --brick: #B53212;
  --umber: #2B211C;
  --stone: #C9BBA6;

  --line: rgba(43, 33, 28, .18);
  --line-soft: rgba(43, 33, 28, .10);
  --line-light: rgba(248, 241, 228, .18);

  --font-display: "Arial Narrow", "Helvetica Neue Condensed", Impact, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 48px);
  --radius: 4px;
}

/* ---------- 基础排版 ---------- */

body {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--cream);
  background-image:
    radial-gradient(circle at 8% 0%, rgba(232, 72, 28, .07), transparent 42%),
    radial-gradient(circle at 94% 4%, rgba(242, 169, 59, .12), transparent 38%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* ---------- 布局辅助 ---------- */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(40px, 7vw, 88px); }
.section--paper { background: var(--paper); }
.section--ink { background: var(--umber); color: var(--cream); }

.grid { display: grid; gap: clamp(14px, 2vw, 24px); }
.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)); }

.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(12px, 1.8vw, 22px);
}
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ---------- 字阶组件 ---------- */

.display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 72px);
  line-height: 1.02;
  letter-spacing: -.015em;
  text-wrap: balance;
}

.heading-2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 40px);
  line-height: 1.12;
  letter-spacing: -.01em;
}

.eyebrow,
.index-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ember);
}
.index-label { color: rgba(43, 33, 28, .55); }

.numeral {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(48px, 9vw, 128px);
  line-height: .9;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
}

.lede {
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: rgba(27, 26, 24, .78);
  max-width: 62ch;
}

.prose { max-width: 68ch; font-size: 16px; line-height: 1.85; }
.prose p + p { margin-top: 14px; }
.prose h3 { font-size: 18px; font-weight: 800; margin-top: 24px; }

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: transparent;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn--ember {
  background: var(--ember);
  border-color: var(--ember);
  color: var(--ink);
}
.btn--ember:hover { background: var(--brick); border-color: var(--brick); color: var(--cream); }

.btn--ink { background: var(--ink); border-color: var(--ink); color: var(--cream); }
.btn--ink:hover { background: var(--forest); border-color: var(--forest); }

.btn--ghost { border-color: rgba(27, 26, 24, .38); }
.btn--ghost:hover { border-color: var(--ember); color: var(--ember); }

.btn--light { border-color: rgba(248, 241, 228, .5); color: var(--cream); }
.btn--light:hover { background: var(--gold); border-color: var(--gold); color: var(--ink); }

.btn--sm { padding: 8px 14px; font-size: 11px; letter-spacing: .14em; }

/* ---------- 标签与面板 ---------- */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid rgba(232, 72, 28, .3);
  border-radius: 999px;
  background: rgba(242, 169, 59, .2);
  color: var(--umber);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  line-height: 1.5;
}
.tag--ink { background: var(--ink); border-color: var(--ink); color: var(--cream); }

.panel {
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--cream);
}
.panel--paper { background: var(--paper); border-color: rgba(43, 33, 28, .12); }
.panel--data {
  background: var(--forest);
  border-color: rgba(248, 241, 228, .16);
  color: var(--cream);
}
.panel--data .lede,
.panel--data .prose { color: rgba(248, 241, 228, .82); }

.tick-rule {
  width: 100%;
  height: 1px;
  border: 0;
  background: repeating-linear-gradient(90deg, rgba(27, 26, 24, .45) 0 8px, transparent 8px 16px);
}
.tick-rule--light {
  background: repeating-linear-gradient(90deg, rgba(248, 241, 228, .42) 0 8px, transparent 8px 16px);
}

/* ---------- 图片容器 ---------- */

.media {
  position: relative;
  overflow: hidden;
  border-radius: 3px;
  background: var(--paper);
}
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--wide { aspect-ratio: 16 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 4 / 5; }
.media--cut { clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%); }
.media__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: rgba(43, 33, 28, .62);
}

/* ---------- 面包屑 ---------- */

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: rgba(43, 33, 28, .6);
}
.crumbs a:hover { color: var(--ember); }
.crumbs__sep { color: var(--stone); }
.crumbs [aria-current="page"] { color: var(--ember); }

/* ---------- 可展开组 ---------- */

.fold { border-top: 1px solid var(--line); }
.fold__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 16px 0;
  text-align: left;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  cursor: pointer;
}
.fold__trigger:hover { color: var(--brick); }
.fold__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  transition: transform .2s ease, background-color .2s ease, color .2s ease;
}
.fold__trigger[aria-expanded="true"] .fold__mark {
  transform: rotate(45deg);
  background: var(--ember);
  border-color: var(--ember);
  color: var(--cream);
}
.fold__panel {
  padding: 0 0 18px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(27, 26, 24, .8);
}
.fold__panel[hidden] { display: none; }

/* ---------- 进入视口显现 ---------- */

.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s ease, transform .5s ease;
}
.has-js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* =========================================================
   页头
   ========================================================= */

.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--cream);
  font-size: 13px;
  letter-spacing: .1em;
  border-radius: 0 0 3px 3px;
  transition: top .18s ease;
}
.skip-link:focus { top: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--cream);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 14px 34px -30px rgba(27, 26, 24, .95);
}

.scroll-progress {
  height: 3px;
  background: rgba(43, 33, 28, .1);
}
.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--ember), var(--gold));
  transform: scaleX(var(--p, 0));
  transform-origin: 0 50%;
  transition: transform .12s linear;
}

.masthead-strip { background: var(--umber); color: var(--cream); }
.masthead-strip__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 32px;
  padding-block: 5px;
}
.strip-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: rgba(248, 241, 228, .6);
}
.strip-mark::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--ember);
}
.strip-list { display: flex; align-items: center; gap: 20px; }
.strip-link {
  padding-bottom: 2px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--gold);
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.strip-link:hover { color: var(--cream); border-bottom-color: var(--ember); }

.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding-block: clamp(9px, 1.3vw, 16px);
}

.masthead__index {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  line-height: 1.6;
  color: rgba(43, 33, 28, .5);
}

.masthead__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.brand__name {
  position: relative;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--ink);
  transition: color .18s ease;
}
.brand__name::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-left: 8px;
  background: var(--ember);
  vertical-align: 6px;
}
.brand__latin {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .46em;
  text-indent: .46em;
  text-transform: uppercase;
  color: var(--ember);
}
.brand:hover .brand__name { color: var(--brick); }

.masthead__line {
  font-size: 11px;
  letter-spacing: .16em;
  color: rgba(43, 33, 28, .58);
}

.masthead__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 13px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  color: var(--ink);
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease;
}
.nav-toggle:hover { background: var(--ink); color: var(--cream); }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: opacity .18s ease, transform .18s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(2.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-2.5px) rotate(-45deg); }
.nav-toggle__label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
}

.site-nav {
  border-top: 1px solid var(--line-soft);
  background: var(--cream);
}
.site-nav__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-track {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(4px, 1.6vw, 20px);
  flex-wrap: wrap;
}
.nav-track a {
  display: inline-block;
  padding: 11px 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--umber);
  border-bottom: 2px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.nav-track a:hover { color: var(--ember); border-bottom-color: var(--gold); }
.nav-track a[aria-current="page"] {
  color: var(--ember);
  font-weight: 800;
  border-bottom-color: var(--ember);
}

.nav-note {
  display: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .22em;
  color: rgba(43, 33, 28, .42);
}
@media (min-width: 1100px) {
  .nav-note {
    display: block;
    position: absolute;
    right: var(--gutter);
    top: 50%;
    transform: translateY(-50%);
  }
}

/* =========================================================
   页脚
   ========================================================= */

.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--umber);
  color: var(--cream);
}
.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--gold) 0 14px, transparent 14px 28px);
}
.site-footer > .shell { padding-block: clamp(34px, 5.5vw, 62px); }

.footer-top {
  display: grid;
  grid-template-columns: minmax(220px, 1.25fr) minmax(0, 2fr);
  gap: clamp(24px, 4vw, 56px);
}

.footer-brand { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.brand--footer { align-items: flex-start; }
.brand--footer .brand__name { color: var(--cream); font-size: clamp(22px, 2.6vw, 30px); }
.brand--footer .brand__name::after { background: var(--gold); }
.brand--footer .brand__latin { color: var(--gold); }
.brand--footer:hover .brand__name { color: var(--gold); }

.footer-tagline {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: rgba(248, 241, 228, .88);
}
.footer-note {
  max-width: 34ch;
  font-size: 12px;
  line-height: 1.8;
  color: rgba(248, 241, 228, .55);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 32px);
}
.footer-col__title {
  padding-bottom: 8px;
  margin-bottom: 12px;
  border-bottom: 1px dashed var(--line-light);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--gold);
}
.footer-list li + li { margin-top: 8px; }
.footer-link {
  font-size: 14px;
  color: rgba(248, 241, 228, .8);
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.footer-link:hover { color: var(--cream); border-bottom-color: var(--gold); }

.footer-contact {
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line-light);
}
.footer-contact__title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .22em;
  color: var(--gold);
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px 24px;
}
.contact-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}
.contact-item--wide { grid-column: 1 / -1; }
.contact-key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: rgba(248, 241, 228, .5);
}
.contact-value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--cream);
  word-break: break-all;
}
.contact-value--address {
  max-width: 42ch;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: .02em;
  color: rgba(248, 241, 228, .82);
  word-break: normal;
}

.copy-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid rgba(248, 241, 228, .28);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: rgba(248, 241, 228, .8);
  cursor: pointer;
  transition: color .18s ease, background-color .18s ease, border-color .18s ease;
}
.copy-chip:hover,
.copy-chip[data-copied="true"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

.contact-note {
  margin-top: 18px;
  max-width: 68ch;
  font-size: 12px;
  line-height: 1.8;
  color: rgba(248, 241, 228, .55);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 24px;
  margin-top: clamp(24px, 3vw, 36px);
  padding-top: 16px;
  border-top: 1px solid var(--line-light);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: rgba(248, 241, 228, .5);
}
.footer-legal { color: rgba(248, 241, 228, .72); }
.footer-fine { flex: 1 1 260px; }
.footer-year { margin-left: auto; }

/* =========================================================
   响应式
   ========================================================= */

@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .col-4, .col-6, .col-8 { grid-column: span 12; }
  .footer-top { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 899px) {
  html { scroll-padding-top: 108px; }

  .nav-toggle { display: inline-flex; }

  .masthead__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
  }
  .masthead__index { display: none; }
  .masthead__brand { align-items: flex-start; text-align: left; }
  .brand { align-items: flex-start; }
  .masthead__line { font-size: 10px; letter-spacing: .12em; }
  .masthead__actions { gap: 8px; }
  .masthead__actions .btn { padding: 10px 14px; font-size: 12px; letter-spacing: .08em; }

  .site-nav { display: none; border-top: 1px solid var(--line); }
  .site-nav[data-open="true"] {
    display: block;
    animation: navReveal .22s ease-out both;
  }
  .site-nav__inner {
    display: block;
    padding-block: 12px 16px;
  }
  .nav-track {
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 6px;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
  }
  .nav-track li { flex: 0 0 auto; scroll-snap-align: start; }
  .nav-track a {
    padding: 8px 14px;
    border: 1px solid rgba(43, 33, 28, .22);
    border-radius: 999px;
    background: rgba(229, 214, 190, .45);
    font-size: 12px;
    letter-spacing: .1em;
  }
  .nav-track a:hover { border-color: var(--ember); }
  .nav-track a[aria-current="page"] {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--cream);
  }

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

@media (max-width: 760px) {
  .masthead-strip { display: none; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-year { margin-left: 0; }
}

@media (max-width: 420px) {
  .nav-toggle__label { display: none; }
  .masthead__actions .btn { padding: 9px 12px; font-size: 11px; }
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
}

/* =========================================================
   降低动态效果
   ========================================================= */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

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

  .scroll-progress__bar { transition: none; }
  .btn:hover { transform: none; }
}