/* /assets/site.css — 球盟会入口 全站共享样式 */

/* ---------- 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; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- Variables ---------- */
:root {
  --c-deep: #0B2B26;
  --c-night: #123A32;
  --c-line: #2E574B;
  --c-pitch: #1F7A4D;
  --c-pitch-dark: #155C39;
  --c-orange: #F26B1D;
  --c-orange-dark: #C24E12;
  --c-yellow: #FFD166;
  --c-white: #F4F7F5;
  --c-mist: #9FB8AE;
  --c-warm: #D9E4DF;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;

  --wrap: 1240px;
  --gap: 24px;
  --radius: 2px;
  --shadow-soft: 0 1px 0 rgba(0,0,0,.35), 0 8px 24px rgba(0,0,0,.22);
  --focus: 0 0 0 2px var(--c-deep), 0 0 0 4px var(--c-orange);
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- Base ---------- */
body {
  background-color: var(--c-deep);
  background-image:
    radial-gradient(120% 70% at 50% -10%, rgba(31,122,77,.34) 0%, rgba(11,43,38,0) 62%),
    linear-gradient(180deg, rgba(18,58,50,.55) 0%, rgba(11,43,38,0) 40%);
  background-repeat: no-repeat;
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  min-height: 100vh;
}
:lang(zh) { word-break: break-word; }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.24; letter-spacing: -.01em; }
h2 { font-size: clamp(22px, 2.4vw, 34px); font-weight: 600; }
h3 { font-size: clamp(18px, 1.6vw, 22px); font-weight: 600; }
p { max-width: 68ch; }
strong { color: var(--c-yellow); font-weight: 600; }

.num, .stat__value, .data-table td, .footer-contact .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

::selection { background: var(--c-orange); color: var(--c-deep); }

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

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 200;
  background: var(--c-orange);
  color: var(--c-deep);
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--radius);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- Layout ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 20px; }
.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gap); }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }
.stack > * + * { margin-top: 20px; }
.rule { height: 1px; background: var(--c-line); border: 0; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(11,43,38,.94);
  border-bottom: 1px solid var(--c-line);
  backdrop-filter: blur(8px);
}
.header-top {
  border-bottom: 1px solid rgba(46,87,75,.7);
  background: linear-gradient(90deg, rgba(18,58,50,.9), rgba(11,43,38,.5));
}
.header-top__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 42px;
  padding-block: 6px;
  flex-wrap: wrap;
}
.brand-line {
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--c-mist);
  text-transform: none;
  max-width: none;
}
.city-switch { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.city-switch__label { font-size: 12px; letter-spacing: .12em; color: var(--c-mist); margin-right: 4px; }
.city-chip {
  font-size: 13px;
  padding: 4px 12px;
  color: var(--c-warm);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.city-chip:hover { border-color: var(--c-pitch); color: var(--c-white); }
.city-chip[aria-pressed="true"] {
  background: var(--c-pitch);
  border-color: var(--c-pitch);
  color: var(--c-white);
}

.header-main__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-block: 14px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark {
  position: relative;
  width: 34px; height: 34px;
  border: 1px solid var(--c-pitch);
  border-radius: 50%;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
}
.brand-mark__line {
  position: absolute; inset: 8px 6px;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}
.brand-mark__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--c-orange);
  box-shadow: 0 0 0 4px rgba(242,107,29,.18);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: .02em;
}
.brand-sub { font-size: 12.5px; color: var(--c-mist); letter-spacing: .06em; }
.nav-layer-note { font-size: 12.5px; color: var(--c-mist); max-width: 34ch; text-align: right; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  color: var(--c-white);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .08em;
}
.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle__bars i { display: block; height: 2px; background: var(--c-orange); }

.nav-bar { background: rgba(18,58,50,.65); border-top: 1px solid var(--c-line); }
.site-nav { display: block; }
.nav-list { display: flex; flex-wrap: wrap; gap: 4px; }
.nav-link {
  display: inline-block;
  position: relative;
  padding: 13px 16px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--c-warm);
  transition: color .2s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 6px;
  height: 2px;
  background: var(--c-orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .22s var(--ease);
}
.nav-link:hover { color: var(--c-white); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--c-white); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); background: var(--c-orange); }

.progress-line {
  position: relative;
  height: 2px;
  background: rgba(46,87,75,.6);
  overflow: hidden;
}
.progress-line__fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--c-pitch), var(--c-orange));
  transition: width .1s linear;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .06em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn--primary { background: var(--c-orange); color: #17110B; border-color: var(--c-orange); }
.btn--primary:hover { background: var(--c-orange-dark); border-color: var(--c-orange-dark); color: var(--c-white); }
.btn--ghost { background: transparent; color: var(--c-white); border-color: var(--c-line); }
.btn--ghost:hover { border-color: var(--c-pitch); color: var(--c-white); background: rgba(31,122,77,.18); }
.btn--quiet { background: transparent; color: var(--c-mist); border-color: transparent; padding-inline: 6px; }
.btn--quiet:hover { color: var(--c-white); }
.btn:active { transform: translateY(1px); }

/* ---------- Sections ---------- */
.section { padding-block: clamp(48px, 7vw, 96px); border-top: 1px solid var(--c-line); }
.section:first-of-type { border-top: 0; }
.section-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.section-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  line-height: .9;
  color: transparent;
  -webkit-text-stroke: 1px var(--c-pitch);
  letter-spacing: -.02em;
}
.section-title { font-size: clamp(22px, 2.6vw, 32px); font-weight: 600; }
.section-note { font-size: 13px; color: var(--c-mist); letter-spacing: .08em; max-width: 44ch; }

/* ---------- Cards ---------- */
.card {
  background: var(--c-night);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-soft);
}
.card--tile {
  background: linear-gradient(160deg, rgba(31,122,77,.20), rgba(18,58,50,.9) 60%);
  position: relative;
}
.card--tile::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(90deg, rgba(46,87,75,.45) 1px, transparent 1px),
    linear-gradient(0deg, rgba(46,87,75,.45) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: .35;
  pointer-events: none;
}
.card--tile > * { position: relative; }
.card--stat { text-align: left; }

/* ---------- Stats ---------- */
.stat { display: grid; gap: 2px; }
.stat__value {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  color: var(--c-yellow);
  line-height: 1.1;
}
.stat__label { font-size: 13px; color: var(--c-mist); letter-spacing: .1em; }

/* ---------- Tabs ---------- */
.tabs { border-bottom: 1px solid var(--c-line); display: flex; gap: 4px; overflow-x: auto; }
.tab {
  position: relative;
  padding: 12px 18px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--c-mist);
  white-space: nowrap;
}
.tab::after {
  content: "";
  position: absolute; left: 12px; right: 12px; bottom: -1px;
  height: 2px; background: var(--c-orange);
  transform: scaleX(0); transform-origin: left center;
  transition: transform .2s var(--ease);
}
.tab[aria-selected="true"] { color: var(--c-white); }
.tab[aria-selected="true"]::after { transform: scaleX(1); }
.tab-panel { padding-top: 22px; animation: fade .24s var(--ease); }
.tab-panel[hidden] { display: none; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

/* ---------- Timeline ---------- */
.timeline { position: relative; padding-left: 26px; }
.timeline::before {
  content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px;
  width: 1px; background: var(--c-line);
}
.timeline-item { position: relative; padding-block: 12px; }
.timeline-dot {
  position: absolute; left: -26px; top: 20px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--c-deep);
  border: 2px solid var(--c-pitch);
}
.timeline-item[aria-current="true"] .timeline-dot { background: var(--c-orange); border-color: var(--c-orange); }

/* ---------- Accordion ---------- */
.accordion { border-top: 1px solid var(--c-line); }
.accordion-item { border-bottom: 1px solid var(--c-line); }
.accordion-trigger {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 16px 4px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-white);
  transition: color .2s var(--ease);
}
.accordion-trigger:hover { color: var(--c-yellow); }
.accordion-trigger::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--c-orange);
  font-size: 20px;
  line-height: 1;
}
.accordion-trigger[aria-expanded="true"]::after { content: "–"; }
.accordion-panel { padding: 0 4px 18px; color: var(--c-warm); }
.accordion-panel[hidden] { display: none; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-line); border-radius: var(--radius); }
.data-table { font-size: 15px; min-width: 560px; }
.data-table caption { text-align: left; padding: 12px 14px; color: var(--c-mist); font-size: 13px; letter-spacing: .08em; }
.data-table th, .data-table td { padding: 12px 14px; border-bottom: 1px solid var(--c-line); text-align: left; }
.data-table thead th {
  background: rgba(31,122,77,.22);
  font-size: 13px; letter-spacing: .1em; color: var(--c-warm); font-weight: 600;
  white-space: nowrap;
}
.data-table tbody tr:nth-child(odd) { background: rgba(18,58,50,.55); }
.data-table tbody tr:hover { background: rgba(31,122,77,.16); }
.data-table button[data-sort] { color: inherit; font: inherit; letter-spacing: inherit; }
.sort-arrow { color: var(--c-orange); font-family: var(--font-mono); margin-left: 6px; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; font-size: 13px; color: var(--c-mist); letter-spacing: .06em; }
.breadcrumb-item + .breadcrumb-item::before { content: "/"; margin-right: 8px; color: var(--c-line); }
.breadcrumb-item a:hover { color: var(--c-white); }

/* ---------- Badges ---------- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12.5px;
  letter-spacing: .1em;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  color: var(--c-mist);
}
.badge--orange { background: rgba(242,107,29,.16); border-color: var(--c-orange); color: var(--c-yellow); }
.badge--green { background: rgba(31,122,77,.2); border-color: var(--c-pitch); color: var(--c-white); }

/* ---------- Map field ---------- */
.map-field {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: #0A241F;
  background-image:
    radial-gradient(80% 60% at 50% 0%, rgba(31,122,77,.35), rgba(11,43,38,0) 70%),
    repeating-linear-gradient(90deg, rgba(46,87,75,.5) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg, rgba(46,87,75,.5) 0 1px, transparent 1px 48px);
}
.map-field__layer { position: relative; z-index: 1; padding: clamp(20px, 3vw, 40px); }
.map-field::after {
  content: "";
  position: absolute; inset: 12% 8%;
  border: 1px solid rgba(46,87,75,.85);
  border-radius: 2px;
  pointer-events: none;
}
.map-field::before {
  content: "";
  position: absolute; left: 50%; top: 12%; bottom: 12%;
  width: 1px; background: rgba(46,87,75,.85);
  pointer-events: none;
}

/* ---------- Media frames (page stage placeholders) ---------- */
.media-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: #0A241F;
  background-image:
    radial-gradient(70% 60% at 50% 20%, rgba(31,122,77,.4), rgba(11,43,38,0) 72%),
    repeating-linear-gradient(45deg, rgba(46,87,75,.35) 0 1px, transparent 1px 22px);
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame img, .media-frame picture { width: 100%; height: 100%; object-fit: cover; }
.media-frame__caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 12px 14px;
  font-size: 13px;
  color: var(--c-warm);
  background: linear-gradient(180deg, rgba(11,43,38,0), rgba(11,43,38,.92));
}

/* ---------- Filter bar ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.filter-chip {
  padding: 7px 15px;
  font-size: 14px;
  letter-spacing: .06em;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  color: var(--c-warm);
  transition: border-color .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
}
.filter-chip:hover { border-color: var(--c-pitch); }
.filter-chip[aria-pressed="true"] { background: var(--c-orange); border-color: var(--c-orange); color: #17110B; font-weight: 600; }
.filter-count { font-size: 13px; color: var(--c-mist); letter-spacing: .1em; }
.filter-count .num { color: var(--c-yellow); font-weight: 700; }
.filter-empty { padding: 24px; border: 1px dashed var(--c-line); color: var(--c-mist); font-size: 14px; }

/* ---------- Reveal / To-top ---------- */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity .32s var(--ease), transform .32s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

.to-top {
  position: fixed;
  right: 18px; bottom: 22px;
  z-index: 80;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  background: var(--c-night);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  color: var(--c-orange);
  font-size: 18px;
  box-shadow: var(--shadow-soft);
  opacity: 0; visibility: hidden;
  transition: opacity .22s var(--ease), visibility .22s var(--ease);
}
.to-top.is-visible { opacity: 1; visibility: visible; }
.to-top:hover { border-color: var(--c-orange); }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: clamp(48px, 7vw, 96px);
  border-top: 1px solid var(--c-line);
  background:
    radial-gradient(90% 120% at 50% 0%, rgba(18,58,50,.9), rgba(11,43,38,.98) 60%),
    var(--c-deep);
  padding-top: clamp(36px, 5vw, 64px);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.5fr;
  gap: 32px 28px;
  padding-bottom: 32px;
}
.footer-brand__name { font-family: var(--font-display); font-size: 22px; font-weight: 700; }
.footer-brand__desc { font-size: 13.5px; color: var(--c-mist); margin-top: 6px; letter-spacing: .06em; }
.footer-shortline {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 2px solid var(--c-orange);
  font-size: 15px;
  color: var(--c-warm);
}
.footer-cta { margin-top: 18px; }
.footer-col__title {
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--c-mist);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}
.footer-links { display: grid; gap: 9px; font-size: 15px; }
.footer-links a { color: var(--c-warm); transition: color .2s var(--ease); }
.footer-links a:hover { color: var(--c-yellow); }
.footer-contact__list { display: grid; gap: 10px; font-size: 14.5px; color: var(--c-warm); }
.footer-contact__list li { display: grid; grid-template-columns: 48px 1fr; gap: 10px; align-items: baseline; }
.footer-contact__key { font-size: 12.5px; letter-spacing: .12em; color: var(--c-mist); }
.footer-contact__list a:hover { color: var(--c-yellow); }
.footer-contact__note { margin-top: 14px; font-size: 13px; color: var(--c-mist); }
.footer-privacy-link { margin-top: 10px; font-size: 14px; }
.footer-privacy-link a { color: var(--c-warm); border-bottom: 1px solid var(--c-line); }
.footer-privacy-link a:hover { color: var(--c-yellow); border-color: var(--c-orange); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-block: 18px 26px;
  border-top: 1px solid var(--c-line);
  font-size: 13px;
  color: var(--c-mist);
  letter-spacing: .06em;
}
.footer-legal__links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-legal__links a:hover { color: var(--c-yellow); }
.footer-legal p { max-width: none; }

/* ---------- Desktop tightening ---------- */
@media (min-width: 1025px) {
  .nav-list { gap: 0; }
}

/* ---------- Tablet ---------- */
@media (max-width: 1024px) {
  body { font-size: 16.5px; }
  :root { --gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .col-3 { grid-column: span 4; }
  .col-9 { grid-column: span 12; }
  .nav-layer-note { display: none; }
}

/* ---------- Mobile ---------- */
@media (max-width: 760px) {
  body { font-size: 16px; }
  .header-top__inner { justify-content: flex-start; }
  .brand-line { font-size: 12px; letter-spacing: .1em; }
  .city-switch__label { display: none; }
  .header-main__inner { padding-block: 12px; }
  .brand-name { font-size: 19px; }
  .brand-sub { font-size: 11.5px; }
  .nav-toggle { display: inline-flex; }

  .nav-bar { border-top: 1px solid var(--c-line); }
  .site-nav {
    display: none;
    padding-block: 6px;
  }
  .site-nav[data-open] { display: block; animation: fade .2s var(--ease); }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-list li + li { border-top: 1px solid rgba(46,87,75,.6); }
  .nav-link { display: block; padding: 14px 4px; letter-spacing: .08em; }
  .nav-link::after { left: 4px; right: auto; width: 28px; bottom: 8px; }

  .grid-12 { grid-template-columns: 1fr; }
  .col-3, .col-4, .col-6, .col-8, .col-9, .col-12 { grid-column: span 1; }

  .section-head { gap: 12px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
  .to-top { right: 12px; bottom: 14px; }
}

/* ---------- Motion preference ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}