/* ============================================================
   178体育看台 · 共享外壳样式 /assets/site.css
   分区：reset → 变量 → 排版 → 组件 → 页头 → 页脚 → 响应式
   ============================================================ */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 128px;
}
body, h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd { 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; }
a { color: inherit; text-decoration: none; }
button { background: none; border: 0; cursor: pointer; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.15; }

/* ---------- 变量 ---------- */
:root {
  /* 背景与材质 */
  --ink: #06110F;
  --ink-2: #0B1F1A;
  --ink-3: #0E2A23;
  --glass: rgba(20, 58, 49, 0.55);
  --line: #1F4A40;
  /* 强调 */
  --blade: #35F0D0;
  --blade-dim: #14A88F;
  --flame: #FF5A2B;
  --flame-hi: #FF8A5C;
  --flag: #FFC53D;
  /* 文字 */
  --text: #EAF6F2;
  --text-soft: #CFE4DE;
  --muted: #9FB8B2;
  /* 实色白板 */
  --board: #EDF4F1;
  --board-ink: #06110F;
  --board-muted: #3C5751;
  --board-accent: #0B6B5A;
  --board-flame: #C63A10;
  /* 字族 */
  --font-display: "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto 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;
  /* 尺度 */
  --wrap: 1280px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 2px;
  /* 动效 */
  --dur-h: 160ms;
  --dur-s: 240ms;
  --dur-r: 420ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 560px at 8% -8%, rgba(53, 240, 208, 0.08), transparent 68%),
    radial-gradient(900px 500px at 96% 2%, rgba(255, 90, 43, 0.07), transparent 70%);
  background-repeat: no-repeat;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
p { overflow-wrap: break-word; }
strong { font-weight: 700; color: var(--text); }

/* ---------- 焦点与可达性 ---------- */
:where(a, button, [tabindex], [role="button"]):focus-visible {
  outline: 2px solid var(--blade);
  outline-offset: 2px;
  border-radius: var(--radius);
}
.skip-link {
  position: absolute;
  left: 50%;
  top: 10px;
  z-index: 300;
  transform: translate(-50%, -180%);
  padding: 10px 20px;
  background: var(--blade);
  color: #04100D;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  transition: transform var(--dur-s) var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- 容器与章节 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: clamp(40px, 7vw, 84px); }
.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px 32px;
  margin-bottom: clamp(20px, 3vw, 36px);
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blade);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--blade-dim);
}
.section__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  transform: scaleX(0.96);
  transform-origin: left center;
}
.section__note {
  max-width: 36ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}
.lede {
  max-width: 40ch;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.75;
  color: var(--text-soft);
}
.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.05em;
  white-space: nowrap;
  transition: background-color var(--dur-h) var(--ease),
              color var(--dur-h) var(--ease),
              border-color var(--dur-h) var(--ease);
}
.btn--flame {
  background: var(--flame);
  border-color: var(--flame);
  color: #08130F;
  font-weight: 700;
}
.btn--flame:hover { background: var(--flame-hi); border-color: var(--flame-hi); }
.btn--ghost { color: var(--muted); }
.btn--ghost:hover { color: var(--text); border-color: var(--blade); }
.btn--board {
  background: var(--board);
  border-color: var(--board);
  color: var(--board-ink);
  font-weight: 700;
}
.btn--board:hover { background: #FFFFFF; border-color: var(--blade-dim); }

/* ---------- 面板 / 标签 / 面包屑 / 正文 ---------- */
.panel {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
}
.panel--glass {
  background: var(--glass);
  border-color: rgba(53, 240, 208, 0.22);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.panel--board {
  background: var(--board);
  border-color: var(--board);
  color: var(--board-ink);
}
.panel__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.panel--board .panel__label { color: var(--board-muted); }
.panel__value {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--text);
}
.panel--board .panel__value { color: var(--board-ink); }
.panel__foot {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}
.panel--board .panel__foot { border-top-color: #C9DCD6; color: var(--board-muted); }
.panel--board .mono { color: var(--board-accent); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.chip--blade { color: var(--blade); border-color: var(--blade-dim); }
.chip--flame { color: var(--flame); border-color: var(--flame); }
.chip--flag { color: var(--flag); border-color: var(--flag); }

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.crumbs__link { color: var(--muted); transition: color var(--dur-h) var(--ease); }
.crumbs__link:hover { color: var(--blade); }
.crumbs__sep { opacity: 0.45; }
.crumbs__current { color: var(--blade); }

.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-soft);
}
.prose > * + * { margin-top: 1.2em; }
.prose h2, .prose h3 { color: var(--text); line-height: 1.25; }
.prose a {
  color: var(--blade);
  border-bottom: 1px solid var(--blade-dim);
  transition: border-color var(--dur-h) var(--ease);
}
.prose a:hover { border-bottom-color: var(--blade); }

/* ---------- 网格与分栏 ---------- */
.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.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)); }

.split {
  display: grid;
  gap: clamp(20px, 3vw, 44px);
  grid-template-columns: minmax(0, 1fr);
}
.split__aside { font-size: 14px; line-height: 1.75; color: var(--muted); }
.split__main { min-width: 0; }

/* ---------- 图片占位容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--ink-2);
  background-image:
    linear-gradient(135deg, rgba(53, 240, 208, 0.10), transparent 55%),
    linear-gradient(315deg, rgba(255, 90, 43, 0.10), transparent 55%);
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.45;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(6, 17, 15, 0.22) 0 1px,
    transparent 1px 3px
  );
}
.media > img,
.media > video,
.media > picture > img,
.media > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--wide { aspect-ratio: 16 / 9; }
.media--band { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--portrait { aspect-ratio: 9 / 16; }
.media--square { aspect-ratio: 1 / 1; }
.media__tag {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 2;
  padding: 3px 8px;
  border: 1px solid var(--line);
  background: rgba(6, 17, 15, 0.78);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--blade);
}
.media__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 26px 14px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text);
  background: linear-gradient(180deg, rgba(6, 17, 15, 0) 0%, rgba(6, 17, 15, 0.88) 100%);
}

/* ---------- 视口显现 ---------- */
.reveal { opacity: 1; transform: none; }
.reveal[data-reveal-ready="1"] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-r) var(--ease), transform var(--dur-r) var(--ease);
}
.reveal[data-reveal-ready="1"].is-in { opacity: 1; transform: none; }

/* ============================================================
   页头
   ============================================================ */
.sky-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 17, 15, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.sky-header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(31, 74, 64, 0.65);
  pointer-events: none;
}
.sky-header__progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--blade-dim), var(--blade));
  transition: width 120ms linear;
}

/* 上层窄带 */
.sky-header__top {
  background: rgba(11, 31, 26, 0.62);
  border-bottom: 1px solid rgba(31, 74, 64, 0.7);
}
.sky-header__top-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 9px var(--gutter);
}
.sky-header__brand {
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
}
.sky-header__brand-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text);
  transform: scaleX(0.96);
  transform-origin: left center;
  transition: color var(--dur-h) var(--ease);
}
.sky-header__brand:hover .sky-header__brand-name { color: var(--blade); }
.sky-header__brand-line {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.sky-header__versions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}
.sky-header__version {
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
}
.sky-header__version--on {
  border-color: var(--blade-dim);
  color: var(--blade);
}
.sky-header__note { color: var(--muted); opacity: 0.9; }

/* 下层主栏 */
.sky-header__main-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  border-top: 0;
}
.sky-header__nav { flex: 1 1 auto; min-width: 0; }
.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
}
.nav-list__item { display: block; }
.nav-list__link {
  position: relative;
  display: inline-block;
  padding: 15px 12px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--muted);
  transition: color var(--dur-h) var(--ease);
}
.nav-list__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 7px;
  height: 2px;
  background: var(--blade);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-s) var(--ease), background-color var(--dur-h) var(--ease);
}
.nav-list__link:hover { color: var(--text); }
.nav-list__link:hover::after { transform: scaleX(1); }
.nav-list__link[aria-current="page"] { color: var(--blade); }
.nav-list__link[aria-current="page"]::after { transform: scaleX(1); }

.sky-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

/* 移动折叠按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: color var(--dur-h) var(--ease), border-color var(--dur-h) var(--ease);
}
.nav-toggle:hover { color: var(--text); border-color: var(--blade-dim); }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}
.nav-toggle__bars i {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform var(--dur-s) var(--ease), opacity var(--dur-s) var(--ease);
}
.sky-header[data-open="true"] .nav-toggle { color: var(--blade); border-color: var(--blade); }
.sky-header[data-open="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.sky-header[data-open="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.sky-header[data-open="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ============================================================
   页脚
   ============================================================ */
.stand-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  border-top: 1px solid var(--line);
  background: var(--ink-2);
  color: var(--muted);
}
.stand-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blade) 0%, var(--blade-dim) 42%, var(--flame) 100%);
}
.stand-footer__inner { padding-top: clamp(34px, 6vw, 64px); }
.stand-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.stand-footer__logo {
  display: inline-block;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--blade-dim);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--text);
  transition: color var(--dur-h) var(--ease), border-color var(--dur-h) var(--ease);
}
.stand-footer__logo:hover { color: var(--blade); border-color: var(--blade); }
.stand-footer__tagline {
  max-width: 36ch;
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.75;
}
.stand-footer__note {
  margin-top: 14px;
  padding-left: 10px;
  border-left: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--blade-dim);
}

.stand-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.stand-footer__col-title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blade-dim);
}
.stand-footer__list li + li { margin-top: 9px; }
.stand-footer__list a {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--muted);
  transition: color var(--dur-h) var(--ease);
}
.stand-footer__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--blade);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-s) var(--ease);
}
.stand-footer__list a:hover { color: var(--text); }
.stand-footer__list a:hover::after { transform: scaleX(1); }

.stand-footer__contact {
  padding: 18px;
  border: 1px solid rgba(53, 240, 208, 0.18);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.stand-footer__contact-row { display: flex; flex-direction: column; gap: 3px; }
.stand-footer__contact-row + .stand-footer__contact-row { margin-top: 14px; }
.stand-footer__contact-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--blade-dim);
}
.stand-footer__contact-value {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text);
  overflow-wrap: break-word;
}
.stand-footer__contact-note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

.stand-footer__bottom {
  margin-top: clamp(28px, 5vw, 48px);
  border-top: 1px solid var(--line);
  background: rgba(6, 17, 15, 0.72);
}
.stand-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
}
.stand-footer__legal { color: var(--muted); }
.stand-footer__copy { color: var(--text); }
.stand-footer__badge {
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--blade);
}

/* ============================================================
   响应式
   ============================================================ */
@media (min-width: 900px) {
  .split--5-7 { grid-template-columns: 5fr 7fr; }
  .split--7-5 { grid-template-columns: 7fr 5fr; }
  .split--4-8 { grid-template-columns: 4fr 8fr; }
  .split--3-9 { grid-template-columns: 3fr 9fr; }
}

@media (min-width: 760px) {
  .stand-footer__grid { grid-template-columns: 1.2fr 1.6fr 1fr; gap: 36px; }
}
@media (min-width: 1120px) {
  .stand-footer__grid { grid-template-columns: 1.45fr 1.6fr 1.15fr; gap: 52px; }
}

@media (max-width: 1023px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 899px) {
  html { scroll-padding-top: 96px; }

  .sky-header__nav {
    display: none;
    flex: 1 1 100%;
    order: 3;
    padding-bottom: 12px;
    border-top: 1px solid var(--line);
  }
  .sky-header[data-open="true"] .sky-header__nav { display: block; }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; padding-top: 6px; }
  .nav-list__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 2px;
    border-bottom: 1px solid rgba(31, 74, 64, 0.6);
    font-size: 16px;
  }
  .nav-list__link::after { left: 0; right: auto; width: 28px; bottom: 6px; }

  .sky-header__actions { margin-left: auto; }
  .sky-header__actions .btn--ghost { display: none; }
  .nav-toggle { display: inline-flex; }

  .section__head { align-items: flex-start; }
  .lede, .section__note { max-width: none; }
}

@media (max-width: 767px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .stand-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
  .stand-footer__bottom-inner { justify-content: flex-start; }
}

@media (max-width: 560px) {
  .sky-header__note { display: none; }
  .sky-header__brand-line { display: none; }
  .btn { padding: 10px 15px; font-size: 13px; }
}

/* ---------- 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal[data-reveal-ready="1"] { opacity: 1; transform: none; }
  .sky-header__progress-bar { transition: none; }
}