/* ============================================================
   完美体育入口 · 共享 Site Kit
   夜场转播控制室 / 赛后数据台 · 框架式侧轨导航
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --ink: #071426;
  --ink-2: #0C2138;
  --ink-3: #102A45;
  --paper: #F4EBDD;
  --paper-2: #E8DEC9;
  --signal: #29F2B0;
  --orange: #FF8A3D;
  --amber: #FFC857;
  --slate: #6C8AA6;
  --line: #A8B8C8;
  --teal-deep: #1E7F6B;
  --brown: #7D5A3C;
  --alert: #B33A3A;

  --font-display: "Barlow Condensed", "DIN Condensed", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --rail-w: 112px;
  --topbar-h: 64px;
  --gutter: clamp(20px, 4vw, 56px);
  --maxw: 1280px;
  --gap: clamp(16px, 2vw, 28px);
  --radius-card: 6px 26px 6px 6px;
  --ease: 160ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 2. reset + 基础排版 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  padding-left: var(--rail-w);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button { font: inherit; color: inherit; }

::selection { background: var(--signal); color: var(--ink); }

h1, h2, h3, h4 {
  margin: 0 0 0.5em;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: 0.01em;
  color: var(--paper);
  text-wrap: balance;
}
h1 { font-size: clamp(38px, 6vw, 72px); }
h2 { font-size: clamp(28px, 4vw, 44px); }
h3 { font-size: clamp(20px, 2.4vw, 26px); }
h4 { font-size: 18px; letter-spacing: 0.04em; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0; padding: 0; }

#main-content {
  display: block;
  scroll-margin-top: calc(var(--topbar-h) + 12px);
}
@media (min-width: 1024px) {
  #main-content { scroll-margin-top: 12px; }
}

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

/* ---------- 3. 工具与文字组件 ---------- */
.visually-hidden {
  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;
}

.display {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 0.94;
  letter-spacing: 0.01em;
  font-size: clamp(44px, 8vw, 128px);
}

.lede {
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.65;
  color: rgba(244, 235, 221, 0.82);
  max-width: 62ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--signal);
}

.index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.mono { font-family: var(--font-mono); letter-spacing: 0.04em; }

.tag {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.5;
  color: var(--slate);
  border: 1px solid rgba(168, 184, 200, 0.4);
  border-radius: 2px;
}
.tag--signal { color: var(--signal); border-color: rgba(41, 242, 176, 0.55); }
.tag--orange { color: var(--orange); border-color: rgba(255, 138, 61, 0.55); }

.link {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 242, 176, 0.45);
  transition: border-color var(--ease), color var(--ease);
}
.link:hover { border-color: var(--signal); }

.band {
  width: 100%;
  height: 4px;
  border-radius: 1px;
  background: var(--signal);
}
.band--orange { background: var(--orange); }
.band--amber { background: var(--amber); }
.band--slate { background: var(--slate); }
.band--teal { background: var(--teal-deep); }

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  padding: 14px 24px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--ease), color var(--ease),
              border-color var(--ease), box-shadow var(--ease);
}
.btn__arrow {
  font-family: var(--font-mono);
  transition: transform var(--ease);
}
.btn:hover .btn__arrow { transform: translateX(4px); }

.btn--primary { background: var(--orange); color: var(--ink); }
.btn--primary:hover { background: var(--amber); }

.btn--signal {
  background: transparent;
  color: var(--signal);
  border-color: rgba(41, 242, 176, 0.55);
}
.btn--signal:hover {
  background: rgba(41, 242, 176, 0.12);
  border-color: var(--signal);
}

.btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(168, 184, 200, 0.45);
}
.btn--ghost:hover {
  border-color: var(--paper);
  background: rgba(244, 235, 221, 0.06);
}

.btn--sm { padding: 9px 16px; font-size: 13px; }

/* ---------- 5. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--slate);
}
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before {
  content: "/";
  color: rgba(168, 184, 200, 0.5);
}
.crumbs a {
  color: rgba(244, 235, 221, 0.72);
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.crumbs a:hover { color: var(--signal); border-color: var(--signal); }
.crumbs [aria-current="page"] { color: var(--signal); }

/* ---------- 6. 布局骨架 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(44px, 6vw, 88px); }

.split {
  display: grid;
  gap: var(--gap);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 900px) {
  .split { grid-template-columns: 5fr 7fr; }
  .split--reverse { grid-template-columns: 7fr 5fr; }
  .split--8-4 { grid-template-columns: 8fr 4fr; }
}

.grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.stack > * + * { margin-top: var(--gap); }

/* ---------- 7. 卡片 / 图片容器 ---------- */
.card {
  position: relative;
  min-width: 0;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--ink-2);
  border: 1px solid rgba(168, 184, 200, 0.18);
  border-radius: var(--radius-card);
  transition: border-color var(--ease), background-color var(--ease),
              transform var(--ease);
}
.card:hover {
  border-color: rgba(41, 242, 176, 0.6);
  background: var(--ink-3);
}
.card--paper {
  background: var(--paper);
  color: #12253B;
  border-color: rgba(125, 90, 60, 0.45);
}
.card--paper h2,
.card--paper h3 { color: var(--ink); }

.media {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid rgba(168, 184, 200, 0.18);
  border-radius: 4px 28px 4px 4px;
  background:
    radial-gradient(120% 90% at 20% 0%, rgba(41, 242, 176, 0.16), transparent 62%),
    radial-gradient(90% 80% at 100% 100%, rgba(255, 138, 61, 0.14), transparent 60%),
    linear-gradient(150deg, #0C2138 0%, #08182C 58%, #071426 100%);
}
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 12px;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}
.media__code {
  position: absolute;
  top: 12px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

/* ---------- 8. 暖纸长文区 ---------- */
.paper {
  background: var(--paper);
  color: #16293F;
}
.paper h1,
.paper h2,
.paper h3,
.paper h4 { color: var(--ink); }
.paper .lede { color: #3A5270; }
.paper .crumbs { color: var(--brown); }
.paper .crumbs a { color: #3A5270; }
.paper .crumbs a:hover { color: var(--teal-deep); }

/* ---------- 9. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--signal);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform 140ms ease;
}
.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--paper);
  outline-offset: 2px;
}

/* ---------- 10. 框架式头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 60;
  width: var(--rail-w);
  background: linear-gradient(180deg, #08182C 0%, var(--ink) 55%, #050F1D 100%);
  border-right: 1px solid rgba(168, 184, 200, 0.18);
}

.rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  height: 100%;
  padding: 20px 6px 14px;
}

.rail__top {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
  color: var(--paper);
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: 2px 16px 2px 2px;
  transition: background-color var(--ease), border-radius var(--ease);
}
.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  background: var(--amber);
  border-radius: 16px 2px 16px 2px;
}
.brand__line {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
  line-height: 1;
}
.brand__sub { display: none; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  background: transparent;
  border: 1px solid rgba(168, 184, 200, 0.35);
  border-radius: 2px;
  color: var(--paper);
  cursor: pointer;
  transition: border-color var(--ease), color var(--ease);
}
.nav-toggle:hover { border-color: var(--signal); color: var(--signal); }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 20px;
}
.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--ease), opacity var(--ease);
}
.nav-toggle__text {
  font-size: 13px;
  letter-spacing: 0.06em;
}
.site-header[data-open] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-nav {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
  min-height: 0;
  padding: 6px 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(168, 184, 200, 0.4) transparent;
}
.site-nav__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 100%;
  list-style: none;
}
.site-nav__item { display: block; width: 100%; }

.nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 100%;
  padding: 8px 2px;
  border-radius: 3px;
  color: rgba(244, 235, 221, 0.8);
  transition: color var(--ease), background-color var(--ease), box-shadow var(--ease);
}
.nav-link__idx {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--slate);
  transition: color var(--ease);
}
.nav-link__label {
  font-size: 13px;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: 0.08em;
  text-align: center;
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--signal);
  background: rgba(41, 242, 176, 0.1);
  box-shadow: inset 2px 0 0 var(--signal);
}
.nav-link:hover .nav-link__idx,
.nav-link:focus-visible .nav-link__idx { color: var(--amber); }

.nav-link[aria-current="page"] {
  color: var(--signal);
  background: rgba(41, 242, 176, 0.14);
  box-shadow: inset 3px 0 0 var(--signal);
}
.nav-link[aria-current="page"] .nav-link__idx { color: var(--amber); }

.rail-cta {
  display: block;
  width: 100%;
  margin-top: auto;
  padding: 12px 6px;
  background: var(--orange);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.06em;
  text-align: center;
  border-radius: 2px;
  transition: background-color var(--ease), box-shadow var(--ease);
}
.rail-cta:hover,
.rail-cta:focus-visible {
  background: var(--amber);
  box-shadow: 0 0 0 2px rgba(255, 138, 61, 0.4);
}

.rail__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.5;
  letter-spacing: 0.06em;
  text-align: center;
  color: var(--slate);
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  height: 3px;
  background: rgba(168, 184, 200, 0.14);
  pointer-events: none;
}
.progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--signal) 0%, var(--amber) 68%, var(--orange) 100%);
}

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--ink-2);
  color: var(--paper);
  border-top: 1px solid rgba(168, 184, 200, 0.16);
}

.footer__signal {
  height: 4px;
  width: 100%;
  background: linear-gradient(
    90deg,
    var(--signal) 0 20%,
    var(--amber) 20% 38%,
    var(--orange) 38% 56%,
    var(--teal-deep) 56% 76%,
    var(--slate) 76% 100%
  );
}

.footer__inner {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(40px, 5vw, 72px) var(--gutter) clamp(32px, 4vw, 52px);
}
@media (min-width: 600px) and (max-width: 899px) {
  .footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
}
@media (min-width: 900px) {
  .footer__inner {
    grid-template-columns: minmax(240px, 1.5fr) repeat(4, minmax(0, 1fr));
    align-items: start;
  }
}

.footer__brand { min-width: 0; }

.footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
}
.footer__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  border-radius: 2px 14px 2px 2px;
  transition: background-color var(--ease);
}
.footer__logo:hover .footer__mark { background: var(--amber); }
.footer__wordmark {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
}
.footer__summary {
  margin: 16px 0 0;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.65;
  color: rgba(244, 235, 221, 0.72);
}
.footer__note {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.footer__col { min-width: 0; }

.footer__col-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal);
}

.footer__list {
  display: grid;
  gap: 10px;
  list-style: none;
}

.footer__link {
  color: rgba(244, 235, 221, 0.78);
  font-size: 14.5px;
  line-height: 1.5;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.footer__link:hover,
.footer__link:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.footer__mail {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(244, 235, 221, 0.55);
  word-break: break-all;
}

.footer__legal { background: var(--paper-2); color: var(--ink); }

.footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 16px var(--gutter);
}

.footer__icp,
.footer__contact {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
}
.footer__icp { color: #12253B; }
.footer__contact { color: #3A5270; }

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  border-radius: 2px;
  transition: background-color var(--ease), color var(--ease);
}
.to-top:hover,
.to-top:focus-visible {
  background: var(--orange);
  color: var(--ink);
}

/* ---------- 12. 响应式：移动 / 平板 ---------- */
@media (max-width: 1023px) {
  body {
    padding-left: 0;
    padding-top: var(--topbar-h);
  }

  .site-header {
    left: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: var(--topbar-h);
    border-right: 0;
    border-bottom: 1px solid rgba(168, 184, 200, 0.2);
  }

  .rail {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    height: 100%;
    padding: 0 clamp(14px, 4vw, 24px);
  }

  .rail__top { width: auto; }

  .brand {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 0;
  }
  .brand__mark {
    width: 34px;
    height: 34px;
    font-size: 12px;
    border-radius: 2px 10px 2px 2px;
  }
  .brand__line {
    writing-mode: horizontal-tb;
    font-size: 15px;
    letter-spacing: 0.12em;
  }
  .brand__sub {
    display: block;
    margin-top: 2px;
    writing-mode: horizontal-tb;
    font-size: 10.5px;
    letter-spacing: 0.12em;
    color: var(--slate);
  }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    z-index: 59;
    display: block;
    width: 100%;
    max-height: calc(100vh - var(--topbar-h));
    max-height: calc(100dvh - var(--topbar-h));
    padding: 10px clamp(14px, 4vw, 24px) 22px;
    overflow-y: auto;
    background: #0B1F35;
    border-bottom: 1px solid rgba(41, 242, 176, 0.3);
    box-shadow: 0 24px 40px rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--ease), transform var(--ease);
  }
  .site-header[data-open] .site-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 14px;
    padding: 14px 6px;
    border-bottom: 1px solid rgba(168, 184, 200, 0.14);
    border-radius: 0;
    box-shadow: none;
  }
  .nav-link:hover,
  .nav-link:focus-visible,
  .nav-link[aria-current="page"] {
    box-shadow: inset 3px 0 0 var(--signal);
  }
  .nav-link__idx { min-width: 24px; font-size: 11px; }
  .nav-link__label { font-size: 15px; letter-spacing: 0.06em; text-align: left; }

  .rail-cta {
    margin-top: 16px;
    padding: 14px;
    font-size: 13px;
  }

  .rail__tag { display: none; }

  .progress { height: 2px; }
}

@media (max-width: 420px) {
  .brand__sub { display: none; }
  .nav-toggle__text { display: none; }
}

@media (max-height: 720px) and (min-width: 1024px) {
  .rail__tag { display: none; }
  .brand__line { font-size: 12.5px; letter-spacing: 0.16em; }
  .nav-link { padding: 6px 2px; }
}

/* ---------- 13. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}