/* =========================================================
   买球网看台 · 共享样式表 /assets/site.css
   夜间看台基底 + 荧光强调色轨道
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --c-ink: #0B1F1A;
  --c-carbon: #101314;
  --c-slate: #1C2B27;
  --c-deep: #16453A;
  --c-lime: #C8FF3D;
  --c-cyan: #2BE3B0;
  --c-orange: #FF6A1F;
  --c-amber: #F5C542;
  --c-white: #F2F7F4;
  --c-muted: #8FA39B;

  --line: rgba(143, 163, 155, .20);
  --line-strong: rgba(143, 163, 155, .38);

  --font-display: "Oswald", "Archivo Narrow", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --rail: 88px;
  --wrap: 1240px;
  --gutter: clamp(20px, 3.4vw, 46px);

  --r-xl: 26px;
  --r-lg: 18px;
  --r-md: 12px;
  --r-pill: 999px;

  --dur: .22s;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --shadow-soft: 0 24px 60px -40px rgba(0, 0, 0, .95);
}

/* ---------- 2. 重置与基底 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-white);
  background-color: var(--c-ink);
  background-image:
    radial-gradient(120% 85% at 88% -12%, rgba(22, 69, 58, .72), rgba(11, 31, 26, 0) 62%),
    radial-gradient(90% 62% at -12% 104%, rgba(43, 227, 176, .07), rgba(11, 31, 26, 0) 58%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  overflow-x: hidden;
}

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

h1, h2, h3, h4 {
  margin: 0 0 .6em;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: .012em;
}

h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); text-transform: uppercase; }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.1rem, 1.6vw, 1.35rem); }
h4 { font-size: 1rem; }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--c-white); text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }

button { font: inherit; color: inherit; }

::selection { background: var(--c-lime); color: var(--c-carbon); }

:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: 3px;
  border-radius: 6px;
}

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

/* 中文正文与等宽数据 */
.mono,
.data-strip,
.eyebrow,
.crumbs,
.tag,
.footer__title {
  font-family: var(--font-mono);
}

/* ---------- 3. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 12px;
  left: calc(var(--rail) + 14px);
  z-index: 300;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  background: var(--c-lime);
  color: var(--c-carbon);
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .1em;
  transform: translateY(-200%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus { transform: translateY(0); }

/* ---------- 4. 品牌轨道 ---------- */
.site-header { position: relative; z-index: 90; }

.rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail);
  z-index: 120;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 22px 0 20px;
  background: linear-gradient(180deg, #131718 0%, var(--c-carbon) 42%, #0c0f10 100%);
  border-right: 1px solid var(--line);
  overflow: hidden;
}

.rail__brand {
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: .92rem;
  font-weight: 700;
  letter-spacing: .34em;
  padding: 10px 6px;
  border-radius: var(--r-pill);
  color: var(--c-white);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.rail__brand:hover,
.rail__brand:focus-visible {
  color: var(--c-lime);
  background: rgba(200, 255, 61, .08);
}

.rail__rule {
  flex: 0 0 34px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line-strong), transparent);
}

.rail__dots {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.rail__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: block;
  transition: transform var(--dur) var(--ease);
}

.rail__dot--lime { background: var(--c-lime); }
.rail__dot--cyan { background: var(--c-cyan); }
.rail__dot--orange { background: var(--c-orange); }
.rail__dot--amber { background: var(--c-amber); }

.rail__dots:hover .rail__dot { transform: scale(1.35); }

.rail__progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--c-lime), var(--c-cyan) 70%, var(--c-orange));
  transform: scaleY(0);
  transform-origin: top center;
  opacity: .9;
  transition: transform .12s linear;
}

.rail__top {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  writing-mode: vertical-rl;
  padding: 14px 8px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(28, 43, 39, .66);
  color: var(--c-muted);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .22em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition:
    opacity var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    visibility var(--dur) var(--ease);
}

.rail__top::before { content: "↑"; font-size: .82rem; line-height: 1; }

.rail__top[data-shown] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.rail__top:hover,
.rail__top:focus-visible {
  color: var(--c-lime);
  border-color: rgba(200, 255, 61, .55);
}

/* ---------- 5. 悬浮胶囊导航 ---------- */
.topbar {
  position: fixed;
  top: 20px;
  right: clamp(16px, 2.4vw, 34px);
  z-index: 140;
  display: flex;
  align-items: center;
  gap: 10px;
}

.capsule {
  display: block;
  padding: 5px;
  border-radius: var(--r-pill);
  background: rgba(16, 19, 20, .74);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
}

.capsule__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.capsule__link {
  display: block;
  padding: 9px 15px;
  border-radius: var(--r-pill);
  font-size: .88rem;
  letter-spacing: .03em;
  white-space: nowrap;
  color: var(--c-muted);
  transition:
    color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.capsule__link:hover {
  color: var(--c-white);
  background: rgba(22, 69, 58, .9);
  transform: translateY(-2px);
}

.capsule__link[aria-current="page"] {
  color: var(--c-lime);
  background: rgba(200, 255, 61, .12);
  box-shadow: inset 0 0 0 1px rgba(200, 255, 61, .45);
  transform: none;
}

.topbar__cta {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: 12px 20px;
  border-radius: var(--r-pill);
  background: var(--c-lime);
  color: var(--c-carbon);
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  box-shadow: 0 16px 36px -20px rgba(200, 255, 61, .8);
  transition:
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.topbar__cta::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: .55;
}

.topbar__cta:hover,
.topbar__cta:focus-visible {
  background: var(--c-white);
  transform: translateY(-2px);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(28, 43, 39, .92);
  color: var(--c-white);
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .16em;
  cursor: pointer;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible { border-color: rgba(200, 255, 61, .55); color: var(--c-lime); }

.nav-toggle__bars { display: grid; gap: 3px; }

.nav-toggle__bar {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.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); }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 10vw, 148px);
  padding: clamp(44px, 6vw, 82px) 0 34px;
  background: linear-gradient(180deg, rgba(16, 19, 20, .18), var(--c-carbon) 26%);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background-image: repeating-linear-gradient(90deg, rgba(143, 163, 155, .45) 0 1px, transparent 1px 16px);
  opacity: .7;
}

.footer__inner {
  width: min(var(--wrap), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.5fr) repeat(4, minmax(120px, 1fr));
  gap: clamp(24px, 3vw, 46px);
}

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

.footer__logo {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--c-white);
  transition: color var(--dur) var(--ease);
}

.footer__logo:hover { color: var(--c-lime); }

.footer__tagline {
  margin: 0;
  font-size: .88rem;
  letter-spacing: .08em;
  color: var(--c-muted);
}

.footer__swatches { display: flex; gap: 7px; }

.footer__swatch {
  display: block;
  width: 26px;
  height: 5px;
  border-radius: 3px;
}

.footer__swatch--lime { background: var(--c-lime); }
.footer__swatch--cyan { background: var(--c-cyan); }
.footer__swatch--orange { background: var(--c-orange); }
.footer__swatch--amber { background: var(--c-amber); }

.footer__col { min-width: 0; }

.footer__title {
  margin: 0 0 16px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.footer__list { display: grid; gap: 10px; }

.footer__link {
  position: relative;
  display: inline-block;
  font-size: .92rem;
  color: var(--c-muted);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.footer__link:hover,
.footer__link:focus-visible { color: var(--c-white); transform: translateX(3px); }
.footer__link:hover::after { transform: scaleX(1); }

.footer__meta {
  margin-top: clamp(32px, 4vw, 58px);
  padding-top: 24px;
  border-top: 1px dashed var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 30px;
  font-family: var(--font-mono);
  font-size: .74rem;
  line-height: 1.9;
  letter-spacing: .04em;
  color: var(--c-muted);
}

.footer__meta p { margin: 0; }
.footer__contact { max-width: 62ch; color: var(--c-muted); }
.footer__legal { max-width: 46ch; }
.footer__copy { color: var(--c-white); opacity: .72; }

/* ---------- 7. 布局工具 ---------- */
.main { display: block; }

.wrap {
  width: min(var(--wrap), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.wrap--narrow { max-width: 760px; }

.section { padding-block: clamp(48px, 7vw, 104px); }
.section--tight { padding-block: clamp(26px, 3.6vw, 52px); }

.grid { display: grid; gap: clamp(16px, 2vw, 28px); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.stack { display: grid; gap: clamp(14px, 1.6vw, 22px); }
.stack--sm { gap: 8px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: .72rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.note-rail {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--c-muted);
  padding-block: 6px;
}

.data-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem 1.6rem;
  padding: 12px clamp(16px, 2vw, 26px);
  border-top: 1px dashed var(--line);
  border-bottom: 1px dashed var(--line);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.data-strip__num { color: var(--c-lime); }

/* ---------- 8. 通用组件 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin-bottom: clamp(20px, 3vw, 34px);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.crumbs__item {
  color: var(--c-muted);
  transition: color var(--dur) var(--ease);
}

.crumbs__item:hover,
.crumbs__item:focus-visible { color: var(--c-lime); }

.crumbs__sep { color: rgba(143, 163, 155, .5); }
.crumbs__current { color: var(--c-white); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  background: none;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.btn--lime {
  background: var(--c-lime);
  color: var(--c-carbon);
  font-weight: 700;
}

.btn--lime:hover,
.btn--lime:focus-visible { background: var(--c-white); transform: translateY(-2px); }

.btn--cyan {
  background: var(--c-cyan);
  color: var(--c-carbon);
  font-weight: 700;
}

.btn--cyan:hover,
.btn--cyan:focus-visible { background: var(--c-white); transform: translateY(-2px); }

.btn--ghost {
  border-color: var(--line-strong);
  color: var(--c-white);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--c-lime);
  color: var(--c-lime);
  transform: translateY(-2px);
}

.link-sweep {
  position: relative;
  display: inline-block;
  color: var(--c-lime);
}

.link-sweep::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.link-sweep:hover::after,
.link-sweep:focus-visible::after { transform: scaleX(1); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: 4px 11px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  background: rgba(28, 43, 39, .6);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--c-muted);
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.tag--lime { color: var(--c-lime); border-color: rgba(200, 255, 61, .45); background: rgba(200, 255, 61, .08); }
.tag--cyan { color: var(--c-cyan); border-color: rgba(43, 227, 176, .45); background: rgba(43, 227, 176, .08); }
.tag--orange { color: var(--c-orange); border-color: rgba(255, 106, 31, .45); background: rgba(255, 106, 31, .09); }
.tag--amber { color: var(--c-amber); border-color: rgba(245, 197, 66, .45); background: rgba(245, 197, 66, .09); }

.card {
  position: relative;
  padding: clamp(18px, 2.2vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: linear-gradient(160deg, rgba(28, 43, 39, .86), rgba(16, 19, 20, .92));
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}

.card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-lime), var(--c-cyan) 55%, transparent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .26s var(--ease);
}

.card:hover { border-color: var(--line-strong); }
.card:hover::after { transform: scaleX(1); }

/* 图片容器基础规则 */
.figure {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background-color: var(--c-slate);
  background-image:
    linear-gradient(rgba(143, 163, 155, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 155, .07) 1px, transparent 1px);
  background-size: 34px 34px, 34px 34px;
}

.figure > img,
.figure > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure--wide { aspect-ratio: 16 / 9; }
.figure--tall { aspect-ratio: 3 / 4; }
.figure--square { aspect-ratio: 1 / 1; }
.figure--band { aspect-ratio: 21 / 9; }

.figure__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: rgba(16, 19, 20, .74);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--c-white);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

/* ---------- 9. 断点 ---------- */
@media (min-width: 768px) {
  body { padding-left: var(--rail); }
}

@media (max-width: 1023px) {
  .capsule__link { padding: 8px 11px; font-size: .8rem; }
  .topbar__cta { padding: 10px 15px; font-size: .72rem; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 767px) {
  body {
    padding-left: 0;
    padding-top: 52px;
    padding-bottom: 86px;
  }

  .skip-link { left: 14px; top: 60px; }

  .rail {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: 52px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .rail__brand { writing-mode: horizontal-tb; letter-spacing: .22em; font-size: .95rem; padding: 6px 4px; }
  .rail__rule,
  .rail__dots,
  .rail__progress { display: none; }

  .rail__top {
    position: fixed;
    right: 14px;
    bottom: 88px;
    writing-mode: horizontal-tb;
    margin-top: 0;
    padding: 10px 14px;
    font-size: .66rem;
    letter-spacing: .16em;
    background: rgba(16, 19, 20, .9);
    z-index: 150;
  }

  .topbar {
    top: auto;
    left: 14px;
    right: 14px;
    bottom: 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .topbar__cta { display: none; }

  .capsule {
    display: none;
    padding: 10px;
    border-radius: 22px;
    background: rgba(16, 19, 20, .94);
  }

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

  .capsule__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .capsule__link {
    padding: 12px 16px;
    border-radius: var(--r-md);
    font-size: 1rem;
  }

  .capsule__link:hover { transform: none; }

  .nav-toggle { display: inline-flex; align-self: flex-end; }

  .grid--12,
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .footer__grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .footer__meta { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .footer__contact { max-width: 100%; word-break: break-word; }
  .figure__caption { left: 10px; bottom: 10px; font-size: .64rem; }
}

/* ---------- 10. 减动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }

  .rail__progress { transition: none; }
}