/* ==========================================================================
   多宝体育主站 — 共享样式表 /assets/site.css
   视觉体系：夜间战术板 · 教练室分镜墙 · 坐标索引
   ========================================================================== */

/* --- reset ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }

/* --- tokens --------------------------------------------------------------- */
:root {
  --ink: #061813;
  --moss: #0D2A23;
  --pitch: #1D4A3C;
  --lime: #C8FF4D;
  --lava: #FF6A2B;
  --silver: #9FB0AB;
  --bone: #F3F1E7;
  --stone: #4E5A56;
  --clay: #B95A30;

  --line: rgba(159, 176, 171, .20);
  --line-soft: rgba(159, 176, 171, .10);
  --line-strong: rgba(159, 176, 171, .42);
  --line-dark: rgba(6, 24, 19, .14);

  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-h: 74px;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-serif: "Songti SC", "STSong", "Noto Serif SC", Georgia, "Times New Roman", serif;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* --- base ----------------------------------------------------------------- */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--ink);
  color: var(--silver);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

/* 精密网格底纹：固定层，仅在首屏上方可见 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(159, 176, 171, .05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(159, 176, 171, .05) 1px, transparent 1px);
  background-size: 80px 80px;
  -webkit-mask-image: radial-gradient(125% 92% at 50% 0%, #000 28%, transparent 100%);
          mask-image: radial-gradient(125% 92% at 50% 0%, #000 28%, transparent 100%);
}

#main-content {
  position: relative;
  z-index: 1;
  padding-top: var(--header-h);
  flex: 1 0 auto;
}

.site-header, .site-footer { position: relative; z-index: 1; }
.site-header { z-index: 100; }

a { color: inherit; text-decoration: none; }
strong { color: var(--bone); font-weight: 700; }

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

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 300;
  padding: 12px 20px;
  background: var(--lime);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
}

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

.section { padding-block: clamp(56px, 8vw, 110px); }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(24px, 3vw, 40px);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

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

/* --- typography ----------------------------------------------------------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--silver);
}

.display-1 {
  font-size: clamp(2.6rem, 8vw, 6.2rem);
  line-height: .94;
  font-weight: 900;
  letter-spacing: -.035em;
  color: var(--bone);
}
.display-2 {
  font-size: clamp(1.9rem, 4.4vw, 3.2rem);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: -.03em;
  color: var(--bone);
}
.display-3 {
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--bone);
}

.lede {
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  line-height: 1.9;
  color: var(--bone);
}

.prose { max-width: 34em; }
.prose p + p { margin-top: 1.1em; }

.section-num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--lime);
}

/* --- panel (反相阅读区) ---------------------------------------------------- */
.panel {
  background: var(--bone);
  color: #22302B;
  padding-block: clamp(48px, 7vw, 96px);
}
.panel .display-1,
.panel .display-2,
.panel .display-3 { color: #0B1B16; }
.panel .lede { color: #22302B; }
.panel .rule { background: var(--line-dark); }
.panel a { color: #0B1B16; }

/* --- buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .05em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.btn-primary {
  background: var(--lava);
  color: var(--ink);
}
.btn-primary:hover { background: var(--lime); color: var(--ink); }
.btn-ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--bone);
}
.btn-ghost:hover { border-color: var(--lime); color: var(--lime); }

/* --- header --------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color .28s var(--ease), border-color .28s var(--ease);
}
.site-header[data-scrolled] {
  background: var(--moss);
  border-bottom-color: var(--line);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  height: var(--header-h);
  transition: height .28s var(--ease);
}
.site-header[data-scrolled] .header-inner { height: calc(var(--header-h) - 12px); }

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.brand-mark {
  position: relative;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--lime);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
}
.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 10px;
  height: 1px;
  background: var(--lime);
}
.brand-mark::before { left: -11px; }
.brand-mark::after { right: -11px; }

.brand-text { display: block; min-width: 0; }
.brand-name {
  display: block;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--bone);
  white-space: nowrap;
}
.brand-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--silver);
  white-space: nowrap;
}

.site-nav { justify-self: center; }
.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-list a {
  position: relative;
  display: block;
  padding: 10px 13px;
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--silver);
  border-left: 2px solid transparent;
  transition: color .2s var(--ease);
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 4px;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease);
}
.nav-list a:hover { color: var(--bone); }
.nav-list a:hover::after,
.nav-list a:focus-visible::after { transform: scaleX(1); }
.nav-list a[aria-current="page"] {
  color: var(--lime);
  border-left-color: var(--lime);
}
.nav-list a[aria-current="page"]::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  justify-self: end;
}
.ghost-link {
  font-size: 12px;
  color: var(--silver);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.ghost-link:hover { color: var(--lime); border-bottom-color: var(--lime); }

.nav-toggle {
  display: none;
  position: relative;
  width: 46px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line-strong);
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 1px;
  margin: 4px auto;
  background: var(--bone);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}
.nav-toggle[aria-expanded="true"] { border-color: var(--lime); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
  background: var(--lime);
}
.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(-5px) rotate(-45deg);
  background: var(--lime);
}

.scroll-meter {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

/* --- footer --------------------------------------------------------------- */
.site-footer {
  margin-top: clamp(64px, 9vw, 128px);
  background: var(--moss);
  border-top: 1px solid var(--line);
  color: var(--silver);
  font-size: 14px;
  flex: 0 0 auto;
}
.site-footer::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--lime) 0 88px, transparent 88px);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.7fr) minmax(0, 1.15fr);
  gap: clamp(28px, 4vw, 56px);
  padding-block: clamp(44px, 6vw, 72px) clamp(32px, 4vw, 52px);
}

.footer-logo {
  display: inline-block;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--bone);
  transition: color .2s var(--ease);
}
.footer-logo:hover { color: var(--lime); }
.footer-brandline {
  margin-top: 8px;
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--bone);
}
.footer-footnote {
  margin-top: 18px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--silver);
  max-width: 24em;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
}
.footer-col-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--bone);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.footer-list li { margin-bottom: 9px; }
.footer-list a {
  font-size: 13px;
  color: var(--silver);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.footer-list a:hover,
.footer-list a:focus-visible { color: var(--lime); border-bottom-color: var(--lime); }

.contact-list li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13px;
}
.contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--silver);
  padding-top: 2px;
}
.contact-val { color: var(--bone); word-break: break-word; }
.contact-note {
  margin-top: 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--silver);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 18px 26px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--silver);
}
.footer-legal { margin: 0; }
.footer-coord { margin: 0; opacity: .72; }

/* --- content components --------------------------------------------------- */
.data-card {
  position: relative;
  padding: 20px 22px;
  background: var(--moss);
  border: 1px solid var(--line);
}
.data-card::before {
  content: "";
  position: absolute;
  left: -1px; top: -1px;
  width: 16px; height: 16px;
  border-left: 2px solid var(--lime);
  border-top: 2px solid var(--lime);
}
.data-card .value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--lime);
}
.data-card .label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--silver);
}
.panel .data-card {
  background: #FFFFFF;
  border-color: var(--line-dark);
}
.panel .data-card .label { color: #4A5A54; }
.panel .data-card .value { color: #1D4A3C; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.tag-lime { color: var(--lime); border-color: var(--lime); }
.tag-lava { color: var(--lava); border-color: var(--lava); }
.tag-clay { color: var(--clay); border-color: var(--clay); }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--silver);
}
.legend-item { display: inline-flex; align-items: center; gap: 8px; }
.legend-swatch {
  width: 10px; height: 10px;
  border: 1px solid currentColor;
  flex: 0 0 10px;
}
.legend-swatch.is-lime { background: var(--lime); color: var(--lime); }

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--silver);
}
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li::after { content: "/"; color: var(--stone); }
.crumbs li:last-child::after { content: none; }
.crumbs a { color: var(--silver); transition: color .2s var(--ease); }
.crumbs a:hover { color: var(--lime); }
.crumbs [aria-current="page"] { color: var(--bone); }

.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--pitch);
  aspect-ratio: 16 / 10;
}
.media-frame > img,
.media-frame > svg,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame > figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 10px 14px;
  background: linear-gradient(to top, rgba(6, 24, 19, .86), rgba(6, 24, 19, 0));
  color: var(--bone);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
}

.index-rail {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line);
}
.index-rail a {
  display: block;
  margin-left: -1px;
  padding: 8px 0 8px 14px;
  border-left: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--silver);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.index-rail a:hover { color: var(--bone); }
.index-rail a[aria-current="true"] {
  color: var(--lime);
  border-left-color: var(--lime);
}

/* --- tabs ----------------------------------------------------------------- */
.tabs { display: block; }
.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 1px solid var(--line);
}
.tab {
  position: relative;
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--silver);
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.tab:hover { color: var(--bone); }
.tab[aria-selected="true"] {
  color: var(--lime);
  border-bottom-color: var(--lime);
}
.tab[aria-selected="true"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: var(--lime);
}
.tab-panel { padding-top: clamp(20px, 3vw, 32px); }
.tab-panel[hidden] { display: none; }

/* --- reveal --------------------------------------------------------------- */
html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
html[data-js="on"] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* --- responsive ----------------------------------------------------------- */
@media (max-width: 1100px) {
  .ghost-link { display: none; }
  .brand-tag { display: none; }
}

@media (max-width: 1024px) {
  .footer-top { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  :root { --header-h: 62px; }

  .header-inner {
    grid-template-columns: auto auto;
    justify-content: space-between;
    gap: 12px;
  }
  .site-header[data-scrolled] .header-inner { height: var(--header-h); }

  .nav-toggle { display: block; }

  .site-nav {
    position: fixed;
    left: 0; right: 0;
    top: var(--header-h);
    z-index: 90;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    background: var(--moss);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 6px 0 18px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s var(--ease);
  }
  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-inline: var(--gutter);
  }
  .nav-list a {
    padding: 15px 12px;
    font-size: 16px;
    border-left: 2px solid transparent;
    border-bottom: 1px solid var(--line-soft);
  }
  .nav-list a::after { display: none; }
  .nav-list a[aria-current="page"] {
    background: rgba(200, 255, 77, .06);
  }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-3, .span-4, .span-5 { grid-column: span 3; }
  .span-6, .span-7, .span-8, .span-12 { grid-column: span 6; }

  .index-rail { position: static; border-left: 0; flex-direction: row; flex-wrap: wrap; gap: 12px; }
  .index-rail a { border-left: 0; border-bottom: 2px solid transparent; padding: 4px 0; margin-left: 0; }
  .index-rail a[aria-current="true"] { border-left: 0; border-bottom-color: var(--lime); }
}

@media (max-width: 720px) {
  .footer-top { grid-template-columns: 1fr; }
  .footer-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-base { justify-content: flex-start; }
}

@media (max-width: 640px) {
  .span-3, .span-4, .span-5 { grid-column: span 6; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 10px; }
}

@media (max-width: 420px) {
  .footer-columns { grid-template-columns: 1fr; }
  .contact-list li { grid-template-columns: 1fr; gap: 2px; }
}

/* --- reduced motion ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html[data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .scroll-meter { transition: none; }
}