/* =========================================================
   九游体育看台 — /assets/site.css
   共享外壳：reset / 变量 / 排版 / 头部 / 页脚 / 通用组件
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--ink);
  color: var(--haze);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.75;
  letter-spacing: .012em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, p, figure, blockquote { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, textarea { font: inherit; }

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

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩 */
  --ink: #0C1511;
  --pitch: #14261C;
  --tier: #1E3A2A;
  --line: #2F5A3F;
  --orange: #FF7A2F;
  --orange-soft: #FFB27A;
  --violet: #6C5CE7;
  --haze: #E9EFE9;
  --mist: #9FB3A4;
  --mist-dim: #6F8A78;

  /* 字体 */
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI",
    Roboto, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "Roboto Mono", "SFMono-Regular",
    Menlo, Consolas, "Courier New", monospace;

  /* 字号阶梯 */
  --step-0: clamp(15px, 0.94rem + 0.16vw, 17px);
  --step-1: clamp(18px, 1.02rem + 0.5vw, 23px);
  --step-2: clamp(25px, 1.35rem + 1.5vw, 40px);
  --step-3: clamp(38px, 1.6rem + 4vw, 88px);
  --step-4: clamp(56px, 1.4rem + 8vw, 136px);

  /* 尺度 */
  --gutter: clamp(18px, 5vw, 64px);
  --shell: 1360px;
  --radius: 2px;
}

/* ---------- 3. 布局容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-body {
  padding-block: clamp(36px, 6vw, 96px);
}

.prose {
  max-width: 38em;
  font-size: var(--step-0);
  line-height: 1.85;
}
.prose p + p { margin-top: 1.05em; }
.prose h2 {
  margin-top: 2.2em;
  font-size: var(--step-1);
  font-weight: 600;
  letter-spacing: -.01em;
}
.prose h3 {
  margin-top: 1.8em;
  font-size: var(--step-0);
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--orange-soft);
}
.prose ul { margin-top: 1em; }
.prose li {
  position: relative;
  padding-left: 20px;
  margin-top: .55em;
}
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 9px;
  height: 1px;
  background: var(--orange);
}
.prose strong { color: var(--haze); font-weight: 800; }

/* ---------- 4. 通用排版 ---------- */
.section {
  position: relative;
  padding-block: clamp(48px, 8vw, 120px);
}
.section__index {
  display: block;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .26em;
  color: var(--orange);
}
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
}
.display-title {
  font-size: var(--step-3);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--haze);
}
.display-title--xl {
  font-size: var(--step-4);
  font-weight: 200;
}
.headline {
  font-size: var(--step-2);
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: -.012em;
}
.lede {
  max-width: 40ch;
  font-size: clamp(16px, 0.7rem + 0.6vw, 19px);
  line-height: 1.8;
  color: var(--mist);
}
.accent-text { color: var(--orange); }
.data-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.divider {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, var(--line), transparent);
}
.slope {
  height: clamp(40px, 7vw, 96px);
  background: linear-gradient(96deg, var(--tier), var(--pitch) 62%, var(--ink));
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 58%);
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--haze);
  background: transparent;
  transition: transform .22s ease, border-color .22s ease,
    color .22s ease, background-color .22s ease;
}
.btn:hover {
  transform: translateY(-2px);
  border-color: var(--orange);
  color: var(--orange-soft);
}
.btn--accent {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
}
.btn--accent:hover {
  background: var(--orange-soft);
  border-color: var(--orange-soft);
  color: var(--ink);
}
.btn--ghost {
  border-color: transparent;
  padding-inline: 4px;
  color: var(--mist);
}
.btn--ghost:hover {
  transform: none;
  color: var(--orange-soft);
}

/* ---------- 6. 标签 / 面板 / 数据 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
  white-space: nowrap;
}
.tag--accent {
  color: var(--orange-soft);
  border-color: rgba(255, 122, 47, .5);
  background: rgba(255, 122, 47, .08);
}
.tag--data {
  color: var(--haze);
  border-color: rgba(108, 92, 231, .55);
  background: rgba(108, 92, 231, .12);
}

.panel {
  position: relative;
  padding: clamp(20px, 3vw, 36px);
  border: 1px solid rgba(47, 90, 63, .6);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(30, 58, 42, .58), rgba(20, 38, 28, .88));
}
.panel::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(47, 90, 63, .32);
  border-radius: 1px;
  pointer-events: none;
}
.panel--flat::before { display: none; }

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 1.4rem + 2vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--haze);
  font-variant-numeric: tabular-nums;
}
.stat__num--accent { color: var(--orange); }
.stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
}

/* ---------- 7. 面包屑 ---------- */
.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}
.crumb a { color: var(--mist); transition: color .2s ease; }
.crumb a:hover { color: var(--orange-soft); }
.crumb__sep { color: var(--line); }
.crumb [aria-current="page"] { color: var(--orange); }

/* ---------- 8. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}
.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)); }

/* ---------- 9. 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(47, 90, 63, .55);
  border-radius: var(--radius);
  background: var(--pitch);
}
.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--banner { aspect-ratio: 21 / 9; }
.media--wide { aspect-ratio: 16 / 9; }
.media--standard { aspect-ratio: 4 / 3; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--mist);
}
.media-stack {
  position: relative;
}
.media-stack::after {
  content: "";
  position: absolute;
  inset: 12px -12px -12px 12px;
  border: 1px solid rgba(47, 90, 63, .4);
  border-radius: var(--radius);
  pointer-events: none;
  z-index: -1;
}

/* ---------- 10. 显现动效协议 ---------- */
[data-reveal-ready] [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .42s ease, transform .42s ease;
}
[data-reveal-ready] [data-reveal].is-in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 11. 无障碍辅助 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 10px;
  left: 16px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--orange);
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .04em;
  border-radius: var(--radius);
  transform: translateY(-220%);
  transition: transform .2s ease;
}
.skip-link:focus {
  transform: translateY(0);
}

/* =========================================================
   12. 头部
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--ink);
  isolation: isolate;
}

/* --- 12.1 上层：品牌 + 联赛索引 --- */
.header-upper {
  height: 46px;
  overflow: hidden;
  background: var(--pitch);
  border-bottom: 1px solid rgba(47, 90, 63, .45);
  transition: height .3s cubic-bezier(.4, 0, .2, 1), opacity .3s ease,
    border-color .3s ease;
}
.site-header[data-condensed="true"] .header-upper {
  height: 0;
  opacity: 0;
  border-bottom-color: transparent;
}
.header-upper__inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.6vw, 40px);
  height: 46px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: 0 0 auto;
}
.brand__mark {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .06em;
  color: var(--haze);
  white-space: nowrap;
}
.brand__mark::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 9px;
  background: var(--orange);
  border-radius: 2px;
  transform: translateY(-1px);
}
.brand__line {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
  white-space: nowrap;
}

.league-strip {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
}
.league-strip::before,
.league-strip::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 26px;
  pointer-events: none;
  z-index: 2;
}
.league-strip::before {
  left: 0;
  background: linear-gradient(90deg, var(--pitch), transparent);
}
.league-strip::after {
  right: 0;
  background: linear-gradient(270deg, var(--pitch), transparent);
}
.league-strip__list {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 4px 26px;
}
.league-strip__list::-webkit-scrollbar { display: none; }

.league-tag {
  display: inline-block;
  padding: 5px 11px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--mist);
  white-space: nowrap;
  transition: color .2s ease, background-color .2s ease;
}
.league-tag:hover {
  color: var(--orange-soft);
  background: rgba(255, 122, 47, .1);
}
.league-tag[aria-current="page"] {
  color: var(--orange);
  background: rgba(255, 122, 47, .12);
}

.header-cta {
  flex: 0 0 auto;
  padding: 8px 17px;
  border-radius: 999px;
  background: var(--orange);
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  white-space: nowrap;
  transition: background-color .22s ease, transform .22s ease;
}
.header-cta:hover {
  background: var(--orange-soft);
  transform: translateY(-1px);
}

/* --- 12.2 下层：栏目导航 --- */
.header-lower {
  position: relative;
  background: linear-gradient(180deg, rgba(20, 38, 28, .6), rgba(12, 21, 17, .94));
  border-bottom: 1px solid rgba(47, 90, 63, .6);
  backdrop-filter: blur(9px);
}
.header-lower__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 64px;
}

.site-nav { flex: 1 1 auto; min-width: 0; }
.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(6px, 1.9vw, 32px);
}
.site-nav__item { flex: 0 0 auto; }

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 21px 2px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--mist);
  transition: color .22s ease;
}
.site-nav__link::before {
  content: attr(data-index);
  display: inline-block;
  margin-right: 7px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--line);
  transform: translateY(-1px);
  transition: color .22s ease;
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 13px;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .26s cubic-bezier(.4, 0, .2, 1);
}
.site-nav__link:hover { color: var(--haze); }
.site-nav__link:hover::before { color: var(--orange); }
.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] {
  color: var(--haze);
  font-weight: 800;
}
.site-nav__link[aria-current="page"]::before { color: var(--orange); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* --- 12.3 汉堡按钮 --- */
.nav-toggle {
  display: none;
  position: relative;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .2s ease;
}
.nav-toggle:hover { border-color: var(--orange); }
.nav-toggle__bar {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--haze);
  transition: transform .25s ease, opacity .2s ease, background-color .2s ease;
}
.nav-toggle__bar:nth-of-type(1) { top: 16px; }
.nav-toggle__bar:nth-of-type(2) { bottom: 16px; }
.site-header[data-open="true"] .nav-toggle { border-color: var(--orange); }
.site-header[data-open="true"] .nav-toggle__bar { background: var(--orange); }
.site-header[data-open="true"] .nav-toggle__bar:nth-of-type(1) {
  transform: translateY(5px) rotate(45deg);
}
.site-header[data-open="true"] .nav-toggle__bar:nth-of-type(2) {
  transform: translateY(-5px) rotate(-45deg);
}

/* --- 12.4 滚动进度 --- */
.scroll-rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
  overflow: hidden;
}
.scroll-rail__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--orange), var(--violet));
}

/* =========================================================
   13. 页脚
   ========================================================= */
.site-footer {
  position: relative;
  background: var(--pitch);
  color: var(--haze);
}

.footer-slope {
  height: clamp(48px, 8vw, 120px);
  background: linear-gradient(92deg, var(--tier) 0%, var(--pitch) 58%, var(--ink) 100%);
  clip-path: polygon(0 100%, 0 44%, 100% 0, 100% 100%);
}

.footer-body {
  padding-block: clamp(32px, 5vw, 68px) clamp(26px, 4vw, 46px);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.35fr;
  gap: clamp(24px, 4vw, 56px);
}

.footer-brand__mark {
  font-size: clamp(22px, 0.9rem + 1.4vw, 32px);
  font-weight: 800;
  letter-spacing: .03em;
  line-height: 1.2;
}
.footer-brand__mark::after {
  content: "";
  display: block;
  width: 34px;
  height: 3px;
  margin-top: 16px;
  background: var(--orange);
}
.footer-brand__line {
  margin-top: 18px;
  max-width: 32ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}
.footer-brand__meta {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist-dim);
}

.footer-col__title {
  position: relative;
  margin-bottom: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
}
.footer-col__title::before {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  margin-bottom: 12px;
  background: var(--line);
}

.footer-links { display: grid; gap: 2px; }
.footer-link {
  display: inline-block;
  padding: 5px 0;
  font-size: 14px;
  color: var(--haze);
  transition: color .2s ease, transform .2s ease;
}
.footer-link::before {
  content: "";
  display: inline-block;
  width: 0;
  height: 1px;
  margin-right: 0;
  background: var(--orange);
  vertical-align: middle;
  transition: width .22s ease, margin-right .22s ease;
}
.footer-link:hover {
  color: var(--orange-soft);
}
.footer-link:hover::before {
  width: 12px;
  margin-right: 8px;
}

.footer-contact { display: grid; gap: 13px; }
.footer-contact__row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  line-height: 1.7;
}
.footer-contact__key {
  flex: 0 0 auto;
  min-width: 38px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--mist-dim);
}
.footer-contact__value {
  color: var(--haze);
  word-break: break-word;
}

.footer-note {
  max-width: 62ch;
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: 20px;
  border-top: 1px dashed rgba(47, 90, 63, .6);
  font-size: 12px;
  line-height: 1.8;
  color: var(--mist);
}

.footer-base {
  background: var(--ink);
  border-top: 1px solid rgba(47, 90, 63, .5);
}
.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  padding-block: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist-dim);
}
.footer-icp { color: var(--mist); }

/* =========================================================
   14. 响应式
   ========================================================= */
@media (max-width: 1080px) {
  .brand__line { display: none; }
  .footer-top { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col--contact { grid-column: 1 / -1; }
  .footer-contact { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 980px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 920px) {
  html { scroll-padding-top: 72px; }

  .header-upper { height: 40px; }
  .header-upper__inner { height: 40px; }
  .header-cta { display: none; }
  .league-strip::before,
  .league-strip::after { display: none; }

  .header-lower__inner { min-height: 58px; }
  .nav-toggle { display: block; }

  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--nav-top, 98px);
    bottom: 0;
    z-index: 55;
    padding: clamp(16px, 5vw, 34px) var(--gutter) 48px;
    overflow-y: auto;
    overscroll-behavior: contain;
    background: linear-gradient(180deg, var(--pitch), var(--ink) 55%);
    border-top: 1px solid rgba(47, 90, 63, .55);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity .28s ease, transform .28s ease, visibility .28s ease;
  }
  .site-header[data-open="true"] .site-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__item { flex: 1 1 auto; }
  .site-nav__link {
    display: block;
    padding: 18px 0;
    font-size: clamp(19px, 5vw, 24px);
    font-weight: 600;
    letter-spacing: .04em;
    border-bottom: 1px solid rgba(47, 90, 63, .38);
    color: var(--haze);
  }
  .site-nav__link::before { font-size: 11px; margin-right: 12px; }
  .site-nav__link::after { bottom: 0; }

  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-col--contact { grid-column: 1 / -1; }
  .footer-contact { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .brand__mark { font-size: 14px; }
  .brand__mark::before { width: 6px; height: 6px; margin-right: 7px; }

  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }

  .display-title { font-size: clamp(34px, 10vw, 56px); }
  .display-title--xl { font-size: clamp(46px, 15vw, 76px); }

  .footer-top { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-base__inner { justify-content: flex-start; }
  .media-stack::after { inset: 8px -8px -8px 8px; }
}

/* =========================================================
   15. 减少动效
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }

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

  .btn:hover,
  .header-cta:hover,
  .footer-link:hover { transform: none; }
}