/* =========================================================
   01体育 · 站点共享样式 /assets/site.css
   深空黑 + 球场绿 + 信号橙 · 纵向叙事长卷外观基础
   ========================================================= */

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

html {
  margin: 0;
  padding: 0;
  -webkit-text-size-adjust: 100%;
  color-scheme: dark;
  scroll-behavior: smooth;
}

body { margin: 0; }

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

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; padding: 0; }

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }

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

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

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

::selection { background: #2FBF71; color: #07130C; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --ink: #0B0F0E;
  --panel: #141C19;
  --line: #24312B;
  --green: #2FBF71;
  --green-deep: #1B7A4A;
  --orange: #FF7A29;
  --orange-soft: #FFB37A;
  --text: #F2F6F3;
  --text-2: #9FB0A7;
  --mist: #C9D8CF;
  --turf: #0F2A1E;

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --num: "DIN Alternate", "Barlow Semi Condensed", "Arial Narrow", Arial, var(--sans);

  --wrap: 1240px;
  --gutter: 24px;
  --step: 24px;
  --dur: 160ms;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 3. 中文排版与基础文字 ---------- */
body {
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text);
}

p { line-height: 1.7; }

strong { font-weight: 700; color: var(--text); }

a { color: var(--green); transition: color var(--dur) var(--ease); }
a:hover { color: var(--orange-soft); }

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

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -120px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--orange);
  color: #14100C;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus {
  top: 12px;
  color: #14100C;
}

/* ---------- 5. 容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--step);
}

.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
.col-3 { grid-column: span 3; }

@media (max-width: 1023px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-8, .col-6 { grid-column: span 6; }
  .col-4 { grid-column: span 3; }
  .col-3 { grid-column: span 3; }
}

@media (max-width: 639px) {
  .grid-12 { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .col-8, .col-6, .col-4, .col-3 { grid-column: span 1; }
}

/* ---------- 6. 面板与切角 ---------- */
.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 28px;
}

.panel--cut {
  border: 0;
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(
    0 0,
    calc(100% - 22px) 0,
    100% 22px,
    100% 100%,
    22px 100%,
    0 calc(100% - 22px)
  );
}

/* ---------- 7. 章节节奏 ---------- */
.section { padding: 96px 0; }
.section--tight { padding: 64px 0; }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 40px;
}

.section-index {
  font-family: var(--num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(26px, 3.4vw, 42px);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text);
}

.section-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
  max-width: 46em;
}

.lede {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
  max-width: 44em;
}

.ribbon {
  height: 4px;
  width: 100%;
  background: var(--green);
  transform-origin: left center;
}

.ribbon--alert { background: var(--orange); }
.ribbon--muted { background: var(--line); }

/* ---------- 8. 标签与数字 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist);
  background: rgba(201, 216, 207, .07);
  border: 1px solid var(--line);
  white-space: nowrap;
}

.tag--brand {
  color: var(--green);
  border-color: rgba(47, 191, 113, .4);
  background: rgba(47, 191, 113, .1);
}

.tag--alert {
  color: var(--orange);
  border-color: rgba(255, 122, 41, .4);
  background: rgba(255, 122, 41, .1);
}

.stat-num {
  font-family: var(--num);
  font-weight: 800;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.stat-num--brand { color: var(--green); }
.stat-num--alert { color: var(--orange); }

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.btn:hover {
  color: var(--green);
  border-color: var(--green);
}

.btn:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--orange);
}

.btn--primary {
  background: var(--green);
  border-color: var(--green);
  color: #07130C;
}

.btn--primary:hover {
  background: var(--green-deep);
  border-color: var(--green-deep);
  color: var(--text);
}

.btn-quick {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  color: #07130C;
  background: var(--green);
  border: 1px solid var(--green);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.btn-quick:hover {
  background: var(--green-deep);
  border-color: var(--green-deep);
  color: var(--text);
}

.btn-quick:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--orange-soft);
}

/* ---------- 10. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--text-2);
}

.breadcrumb-link { color: var(--text-2); }
.breadcrumb-link:hover { color: var(--green); }

.breadcrumb-sep { color: #3C4C44; }

.breadcrumb-current { color: var(--mist); }

/* ---------- 11. 正文容器 ---------- */
.prose { max-width: 68ch; }

.prose p + p { margin-top: 1.2em; }

.prose h2 {
  margin-top: 2em;
  margin-bottom: .6em;
  font-size: clamp(21px, 2.2vw, 26px);
}

.prose h3 {
  margin-top: 1.6em;
  margin-bottom: .5em;
  font-size: 19px;
}

.prose ul { margin: 1em 0; }

.prose li {
  position: relative;
  padding-left: 24px;
  margin-bottom: .5em;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--green);
}

/* ---------- 12. 媒体容器（供页面阶段放置图片） ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  aspect-ratio: 16 / 9;
}

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

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

.media-frame--edge {
  border: 0;
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(0 0, calc(100% - 32px) 0, 100% 32px, 100% 100%, 0 100%);
}

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  background: rgba(11, 15, 14, .82);
}

/* ---------- 13. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 28px;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 20px var(--gutter);
  transition: padding 200ms var(--ease);
}

.brand-block {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.brand-mark {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

.brand-mark:hover { color: var(--green); }

.brand-season {
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange);
  border: 1px solid rgba(255, 122, 41, .4);
}

.brand-meta {
  flex-basis: 100%;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-2);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 13px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--text);
  border: 1px solid var(--line);
}

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

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle-bars i {
  display: block;
  height: 1.5px;
  width: 100%;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) {
  transform: translateY(4.5px) 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(-4.5px) rotate(-45deg);
}

.site-nav { margin-left: auto; }

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.nav-item { position: relative; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 10px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .03em;
  color: var(--text-2);
  transition: color var(--dur) var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 1px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.nav-link:hover { color: var(--text); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] { color: var(--text); }

.nav-link[aria-current="page"]::after {
  background: var(--orange);
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 12px;
  margin-left: 4px;
}

.site-header[data-compact] .header-inner {
  padding-top: 10px;
  padding-bottom: 10px;
}

.site-header[data-compact] .brand-mark { font-size: 19px; }
.site-header[data-compact] .brand-meta { display: none; }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 120ms linear;
  pointer-events: none;
}

/* 页头：平板与手机 */
@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    margin: 0;
    padding: 8px var(--gutter) 20px;
    background: var(--panel);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    max-height: 72vh;
    overflow-y: auto;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    display: block;
    padding: 15px 2px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
    color: var(--text);
  }

  .nav-link::after {
    left: 2px;
    right: auto;
    width: 24px;
    bottom: 10px;
  }

  .nav-item:last-child .nav-link { border-bottom: 0; }
}

/* 页头：手机端 CTA 变为底部固定条 */
@media (max-width: 640px) {
  .header-actions {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    margin: 0;
    padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px));
    background: var(--ink);
    border-top: 1px solid var(--line);
  }

  .btn-quick {
    width: 100%;
    padding: 13px 18px;
    font-size: 15px;
  }

  body { padding-bottom: 78px; }
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  margin-top: 120px;
  background: var(--turf);
  border-top: 1px solid var(--line);
  color: var(--text-2);
}

.footer-inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 64px var(--gutter) 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px 32px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.footer-mark {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .02em;
  color: var(--text);
}

.footer-mark:hover { color: var(--green); }

.footer-tagline {
  max-width: 24em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
}

.footer-season {
  padding: 4px 9px;
  font-size: 11px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--green);
  border: 1px solid rgba(47, 191, 113, .35);
}

.footer-col-title {
  position: relative;
  margin-bottom: 16px;
  padding-left: 11px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
}

.footer-col-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 12px;
  background: var(--green);
  transform: translateY(-50%);
}

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

.footer-link {
  font-size: 14px;
  color: var(--text-2);
  transition: color var(--dur) var(--ease);
}

.footer-link:hover { color: var(--green); }

.footer-contact {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.footer-contact-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 48px;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-item dt {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-2);
}

.contact-item dd {
  font-size: 15px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.footer-note {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-2);
}

.footer-legal {
  padding-top: 24px;
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--text-2);
}

.footer-legal a {
  color: var(--mist);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-legal a:hover { color: var(--green); }

@media (max-width: 1023px) {
  .site-footer { margin-top: 88px; }

  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

  .footer-brand { grid-column: 1 / -1; }

  .footer-contact { grid-template-columns: minmax(0, 1fr); gap: 16px; }
}

@media (max-width: 639px) {
  .footer-inner { padding: 48px 20px 28px; }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 20px;
  }

  .contact-list { flex-direction: column; gap: 14px; }
}

/* ---------- 15. 显现协议 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .js-reveal [data-reveal] {
    opacity: 0;
    transition: opacity 240ms var(--ease), transform 240ms var(--ease);
  }

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

  .js-reveal [data-reveal="rise"] {
    transform: translateY(12px);
  }

  .js-reveal .ribbon[data-reveal] {
    transform: scaleX(.18);
    transform-origin: left center;
  }

  .js-reveal .ribbon[data-reveal].is-in {
    transform: scaleX(1);
  }
}

/* ---------- 16. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .scroll-progress { transition: none; }
}