/* ==========================================================================
   博云体育赛事 · 全站共享样式 /assets/site.css
   冰原蓝底 · 雪白面板 · 午夜深色阅读区 · 荧光橙与电光紫数据点
   ========================================================================== */

:root {
  --ice: #DCEFF8;
  --ice-deep: #C3E2F1;
  --snow: #FFFFFF;
  --cream: #FAF3E7;
  --ink: #1F1A16;
  --ink-soft: #514840;
  --midnight: #0B1B2B;
  --midnight-2: #10293E;
  --cold-white: #F2F8FF;
  --orange: #FF5A1F;
  --violet: #7B2FF7;
  --cyan: #79D0E8;

  --line-soft: rgba(31, 26, 22, 0.1);
  --line-cool: rgba(121, 208, 232, 0.32);
  --line-dark: rgba(242, 248, 255, 0.16);

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

  --shell: 1200px;
  --gutter: clamp(1.15rem, 4vw, 3.25rem);
  --header-h: clamp(64px, 6.4vw, 82px);

  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;

  --shadow-raise: 0 18px 44px -22px rgba(11, 27, 43, 0.42);
  --shadow-soft: 0 10px 30px -18px rgba(11, 27, 43, 0.35);

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

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

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

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

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

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

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

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

table { border-collapse: collapse; width: 100%; }

/* ---------- base ---------- */
body {
  padding-top: var(--header-h);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  color: var(--ink);
  background: var(--ice);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body.has-overlay-header { padding-top: 0; }

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

:focus-visible {
  outline: 3px solid var(--violet);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: var(--violet);
  color: var(--cold-white);
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  transform: translateY(-140%);
  padding: 0.75rem 1.25rem;
  background: var(--midnight);
  color: var(--cold-white);
  font-size: 0.9rem;
  font-weight: 700;
  border-bottom-right-radius: var(--radius-sm);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: -3px;
}

/* ---------- layout containers ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow { max-width: 780px; }

.section {
  padding-block: clamp(3rem, 7vw, 6rem);
}

.section--tight { padding-block: clamp(2rem, 4.5vw, 3.5rem); }

.grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 760px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--asym { grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); }
}

/* ---------- typography ---------- */
.display {
  font-size: clamp(2.4rem, 7.6vw, 5.5rem);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.display-em {
  color: var(--orange);
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.05em;
}

.section-title {
  font-size: clamp(1.7rem, 3.6vw, 2.9rem);
  font-weight: 900;
  letter-spacing: -0.04em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 3px;
  background: var(--orange);
  border-radius: 3px;
}

.lede {
  font-size: clamp(1.02rem, 1.4vw, 1.15rem);
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 60ch;
}

.annotation {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--violet);
  text-transform: uppercase;
}

.annotation--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.34em;
  color: var(--cyan);
}

.data-figure {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

/* ---------- panels ---------- */
.panel {
  position: relative;
  padding: clamp(1.4rem, 3vw, 2.5rem);
  background: var(--snow);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.panel--ice { background: var(--ice); border-color: var(--line-cool); }
.panel--cream { background: var(--cream); border-color: rgba(31, 26, 22, 0.14); }

.panel--ink {
  background: var(--midnight);
  color: var(--cold-white);
  border-color: transparent;
}

.panel--ink .lede,
.panel--ink .stat-label { color: rgba(242, 248, 255, 0.72); }
.panel--ink a { color: var(--cyan); }
.panel--ink .stat-value { color: var(--cold-white); }

.panel--lift:hover,
.panel--lift:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-raise);
  border-color: var(--orange);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.4rem;
  border-radius: 999px;
  border: 2px solid transparent;
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: background-color 0.22s var(--ease), color 0.22s var(--ease),
              border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.btn-primary {
  background: var(--orange);
  color: var(--midnight);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--violet);
  color: var(--cold-white);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background: var(--ink);
  color: var(--cold-white);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(242, 248, 255, 0.42);
  color: var(--cold-white);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--midnight);
}

/* ---------- tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.68rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: var(--ice);
  color: var(--midnight);
  border: 1px solid var(--line-cool);
}

.tag--orange { background: var(--orange); color: var(--midnight); border-color: transparent; }
.tag--violet { background: var(--violet); color: var(--cold-white); border-color: transparent; }
.tag--cyan { background: transparent; color: var(--midnight); border-color: var(--cyan); }

/* ---------- stats ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.stat-value--orange { color: var(--orange); }
.stat-value--violet { color: var(--violet); }

.stat-unit {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink-soft);
  margin-left: 0.3rem;
}

.stat-label {
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

/* ---------- cards ---------- */
.card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: clamp(1.2rem, 2.4vw, 1.75rem);
  background: var(--snow);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease), border-color 0.24s var(--ease);
}

.card:hover,
.card:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
  border-color: var(--orange);
}

.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.card-body { color: var(--ink-soft); font-size: 0.96rem; }

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--violet);
}

/* ---------- breadcrumbs ---------- */
.breadcrumbs { padding-block: 1rem 0; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.breadcrumb-link { color: var(--ink-soft); border-bottom: 1px solid transparent; }
.breadcrumb-link:hover,
.breadcrumb-link:focus-visible { color: var(--orange); border-bottom-color: var(--orange); }

.breadcrumb-sep { color: var(--cyan); }

.breadcrumb-item[aria-current="page"] { color: var(--ink); font-weight: 700; }

/* ---------- image frames ---------- */
.img-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  aspect-ratio: 16 / 9;
  background: linear-gradient(146deg, var(--ice) 0%, var(--cyan) 100%);
  border: 1px solid var(--line-cool);
}

.img-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--tall { aspect-ratio: 3 / 4; }

.img-frame--tint::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(198deg, rgba(11, 27, 43, 0.55) 0%, rgba(255, 90, 31, 0.24) 100%);
}

/* ---------- scroll progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 160;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--orange) 0%, var(--violet) 100%);
  pointer-events: none;
}

/* ==========================================================================
   页头
   ========================================================================== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 120;
  background: transparent;
  color: var(--ink);
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease),
              box-shadow 0.3s var(--ease);
}

.site-header.is-scrolled,
.site-header.is-menu-open {
  background: var(--midnight);
  color: var(--cold-white);
  box-shadow: 0 12px 34px -22px rgba(11, 27, 43, 0.9);
}

.header-shell {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.75rem);
  width: 100%;
  max-width: var(--shell);
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 品牌 */
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 1 auto;
  min-width: 0;
}

.brand-glyph {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: clamp(2.1rem, 3vw, 2.6rem);
  height: clamp(2.1rem, 3vw, 2.6rem);
  border-radius: 12px;
  background: var(--midnight);
  color: var(--cold-white);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
}

.site-header.is-scrolled .brand-glyph,
.site-header.is-menu-open .brand-glyph {
  background: var(--orange);
  color: var(--midnight);
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.25;
}

.brand-name {
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.3s var(--ease);
}

.site-header.is-scrolled .brand-tagline,
.site-header.is-menu-open .brand-tagline {
  color: rgba(242, 248, 255, 0.62);
}

/* 导航面板 */
.nav-panel {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1.6vw, 1.5rem);
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.85rem, 1.8vw, 1.75rem);
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.35rem 0.05rem;
  font-size: 0.94rem;
  font-weight: 500;
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.1rem;
  height: 2px;
  border-radius: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.22s var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--orange); }

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--orange);
  font-weight: 700;
}

.site-header.is-scrolled .nav-link,
.site-header.is-menu-open .nav-link { color: rgba(242, 248, 255, 0.82); }

.site-header.is-scrolled .nav-link:hover,
.site-header.is-scrolled .nav-link[aria-current="page"],
.site-header.is-menu-open .nav-link[aria-current="page"] { color: var(--orange); }

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

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  margin-left: auto;
  padding: 0.5rem 0.85rem;
  border: 2px solid currentColor;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  transition: background-color 0.22s var(--ease), color 0.22s var(--ease),
              border-color 0.22s var(--ease);
}

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

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle-bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 移动端导航 ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .nav-panel {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 110;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    width: min(420px, 90vw);
    max-width: 100%;
    margin-left: 0;
    padding: calc(var(--header-h) + 1.5rem) var(--gutter) 2.5rem;
    background: var(--midnight);
    color: var(--cold-white);
    border-left: 1px solid var(--line-dark);
    overflow-y: auto;
    transform: translateX(102%);
    visibility: hidden;
    transition: transform 0.3s var(--ease), visibility 0.3s var(--ease);
  }

  .nav-panel[data-open] {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-list {
    counter-reset: nav;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .nav-link {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
    padding: 0.9rem 0;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--cold-white);
    border-bottom: 1px solid var(--line-dark);
  }

  .nav-link::before {
    counter-increment: nav;
    content: counter(nav, decimal-leading-zero);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    color: var(--cyan);
  }

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

  .nav-link:hover,
  .nav-link:focus-visible,
  .nav-link[aria-current="page"] { color: var(--orange); }

  .nav-cta {
    margin-top: 1.75rem;
    width: 100%;
    padding-block: 0.85rem;
  }
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  margin-top: clamp(2rem, 5vw, 4rem);
  padding-block: clamp(2.75rem, 6vw, 4.5rem) 1.75rem;
  background: var(--midnight);
  color: var(--cold-white);
  border-top: 3px solid var(--orange);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3.25rem);
}

@media (min-width: 760px) {
  .footer-grid { grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.85fr) minmax(0, 0.95fr); }
}

.footer-brand { max-width: 44ch; }

.footer-mark {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--cold-white);
}

.footer-mark::after {
  content: "";
  display: block;
  width: 52px;
  height: 3px;
  margin-top: 0.7rem;
  border-radius: 3px;
  background: var(--orange);
}

.footer-line {
  margin-top: 1rem;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(242, 248, 255, 0.7);
}

.footer-heading {
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.94rem;
}

.footer-links a {
  display: inline-block;
  color: rgba(242, 248, 255, 0.82);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--orange);
  transform: translateX(3px);
}

.footer-links--contact {
  margin-top: 1.5rem;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: rgba(242, 248, 255, 0.78);
}

.footer-key {
  display: inline-block;
  min-width: 3.2rem;
  margin-right: 0.5rem;
  color: var(--cyan);
  letter-spacing: 0.08em;
}

.footer-note {
  margin-top: 1.25rem;
  font-size: 0.82rem;
  line-height: 1.75;
  color: rgba(242, 248, 255, 0.58);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-dark);
  font-size: 0.8rem;
  color: rgba(242, 248, 255, 0.58);
}

.footer-copy,
.footer-meta { font-family: var(--font-mono); letter-spacing: 0.05em; }

/* ---------- 无障碍动效 ---------- */
@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;
  }

  .panel--lift:hover,
  .card:hover { transform: none; }
}

@media (max-width: 420px) {
  .brand-tagline { display: none; }
  .nav-toggle-text { display: none; }
}