/* =========================================================
   site.css — 完美体育赛事 共享外壳与基础组件
   1. reset  2. tokens  3. 排版  4. 布局  5. 组件
   6. header  7. footer  8. 响应式  9. 动效降级
   ========================================================= */

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

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

body {
  margin: 0;
  padding-top: var(--header-h);
  background-color: var(--ink);
  background-image: linear-gradient(rgba(42, 61, 92, 0.22) 1px, transparent 1px);
  background-size: 100% 88px;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

h1, h2, h3, h4, p, figure, blockquote { margin: 0; }

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

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

/* ---------- 2. tokens ---------- */
:root {
  --ink: #070E1C;
  --panel: #0E1A2E;
  --raise: #172944;
  --paper: #F2F6FA;
  --cyan: #27F0D6;
  --orange: #FF6B2C;
  --purple: #8D7CFF;
  --green: #4FD18B;
  --gold: #E4B45A;
  --mute: #8FA6C4;
  --line: #2A3D5C;

  --shell: 1440px;
  --gutter: clamp(18px, 4.2vw, 56px);
  --header-h: 108px;

  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-label: "Barlow Condensed", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --shadow-hard: 8px 8px 0 0 rgba(3, 8, 17, 0.62);
  --edge: 1px solid var(--line);
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 3. 中文排版 ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3.2rem, 7vw, 7.6rem);
  line-height: 0.94;
  letter-spacing: -0.04em;
  color: var(--paper);
}

.title-lg {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 4vw, 3.4rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.label {
  display: inline-block;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.72rem;
  line-height: 1.4;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mute);
}

.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.82em;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

/* ---------- 4. 布局 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(26px, 4vw, 54px); }

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line);
}

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

/* 让首屏压到透明导航之下 */
.under-nav { margin-top: calc(var(--header-h) * -1); }

/* ---------- 5. 组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  padding: 0.82em 1.35em;
  border: 2px solid var(--cyan);
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  line-height: 1.1;
  text-transform: uppercase;
  box-shadow: 4px 4px 0 0 #04101c;
  transition: transform 0.18s linear, box-shadow 0.18s linear,
              background-color 0.18s linear, color 0.18s linear,
              border-color 0.18s linear;
}
.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 0 #04101c;
}
.btn:active {
  transform: translate(0, 0);
  box-shadow: 2px 2px 0 0 #04101c;
}

.btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--line);
}
.btn--ghost:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.btn--signal {
  background: var(--orange);
  border-color: var(--orange);
  color: #180A03;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  padding: 0.28em 0.68em;
  border: 1px solid var(--line);
  background: rgba(23, 41, 68, 0.6);
  color: var(--mute);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  line-height: 1.5;
  white-space: nowrap;
}
.tag--cyan { color: var(--cyan); border-color: rgba(39, 240, 214, 0.45); }
.tag--orange { color: var(--orange); border-color: rgba(255, 107, 44, 0.45); }
.tag--purple { color: var(--purple); border-color: rgba(141, 124, 255, 0.45); }
.tag--green { color: var(--green); border-color: rgba(79, 209, 139, 0.45); }
.tag--gold { color: var(--gold); border-color: rgba(228, 180, 90, 0.45); }

.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 32px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--line);
  box-shadow: var(--shadow-hard);
}
.panel--raise {
  background: var(--raise);
  border-top-color: var(--cyan);
}

.prose {
  max-width: 720px;
  color: #D9E4F1;
  font-size: 1.04rem;
  line-height: 1.8;
}
.prose p + p { margin-top: 1.05em; }
.prose h2 {
  margin: 1.6em 0 0.5em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.prose strong { color: var(--paper); font-weight: 700; }
.prose ul { margin: 1em 0; padding-left: 1.1em; list-style: square; }
.prose li + li { margin-top: 0.4em; }
.prose li::marker { color: var(--cyan); }
.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(39, 240, 214, 0.42);
}

.breadcrumb {
  padding-block: 14px;
  border-bottom: 1px solid var(--line);
}
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  letter-spacing: 0.12em;
  color: var(--mute);
  text-transform: uppercase;
}
.breadcrumb-item { display: inline-flex; align-items: center; gap: 0.4em; }
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--line);
  margin-right: 0.4em;
}
.breadcrumb-item[aria-current="page"] { color: var(--cyan); }
.breadcrumb-link { color: var(--mute); transition: color 0.18s linear; }
.breadcrumb-link:hover { color: var(--cyan); }

/* 图片容器基础规则（页面阶段放入图片或占位） */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--panel);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.06);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }

.media-caption {
  display: block;
  margin-top: 14px;
  padding-left: 10px;
  border-left: 2px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.7;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.media-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* 滚动显现（页面阶段加 data-reveal） */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.52s var(--ease), transform 0.52s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 6. header ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 16px;
  background: var(--cyan);
  color: var(--ink);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  transform: translateY(-180%);
  transition: transform 0.18s linear;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.18s linear, border-color 0.18s linear,
              box-shadow 0.18s linear;
}
.site-header.is-scrolled {
  background: rgba(7, 14, 28, 0.95);
  border-bottom-color: var(--line);
  box-shadow: 0 12px 34px rgba(2, 6, 14, 0.55);
  backdrop-filter: blur(8px);
}

.header-rail {
  height: 34px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(42, 61, 92, 0.65);
  overflow: hidden;
}
.rail-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}
.rail-status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  white-space: nowrap;
}
.rail-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(39, 240, 214, 0.18);
  animation: rail-pulse 2.4s steps(2, end) infinite;
}
@keyframes rail-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.22; }
}
.rail-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--mute);
  white-space: nowrap;
}
.rail-clock {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
  white-space: nowrap;
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(12px, 2vw, 32px);
  height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  box-shadow: 4px 4px 0 0 var(--cyan);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand-name {
  font-weight: 900;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.brand-tag {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mute);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.4vw, 22px);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 12px;
  font-size: clamp(0.84rem, 0.95vw, 0.95rem);
  font-weight: 500;
  line-height: 1.4;
  color: #C6D4E6;
  transition: color 0.18s linear, transform 0.18s linear;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.18s linear;
}
.nav-link:hover {
  color: var(--paper);
  transform: translateY(-2px);
}
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] {
  color: var(--cyan);
  font-weight: 700;
}
.nav-link[aria-current="page"]::after {
  left: 12px;
  right: auto;
  width: 18px;
  transform: scaleX(1);
}

.nav-cta { flex: 0 0 auto; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  background: rgba(23, 41, 68, 0.72);
  color: var(--paper);
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 0.18s linear, opacity 0.18s linear;
}
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- 7. footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 120px);
  background: var(--ink);
  border-top: 1px solid var(--line);
  color: var(--mute);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background: linear-gradient(
    90deg,
    var(--cyan) 0 22%,
    var(--orange) 22% 32%,
    var(--gold) 32% 40%,
    var(--purple) 40% 46%,
    var(--green) 46% 52%,
    var(--line) 52% 100%
  );
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 1.1fr auto;
  gap: clamp(24px, 4vw, 64px);
  padding-block: clamp(42px, 6vw, 76px) clamp(30px, 4vw, 56px);
}

.footer-brand { min-width: 0; }
.footer-index {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.footer-brandline {
  max-width: 20ch;
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.4vw, 2rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.footer-note {
  max-width: 34ch;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--mute);
}

.footer-nav-title,
.footer-contact-title {
  display: block;
  margin-bottom: 16px;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--paper);
}
.footer-nav-title::before,
.footer-contact-title::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 2px;
  margin-right: 9px;
  vertical-align: middle;
  background: var(--cyan);
}

.footer-links { display: grid; gap: 0; }
.footer-link {
  display: block;
  padding: 7px 0;
  border-bottom: 1px dashed rgba(42, 61, 92, 0.72);
  font-size: 0.92rem;
  color: var(--mute);
  transition: color 0.18s linear, transform 0.18s linear,
              border-color 0.18s linear;
}
.footer-link:hover {
  color: var(--cyan);
  transform: translateX(3px);
  border-bottom-color: rgba(39, 240, 214, 0.5);
}

.footer-contact-item { margin-bottom: 14px; }
.footer-contact-label {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}
.footer-contact-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.65;
  color: #CBD8E8;
  overflow-wrap: anywhere;
}
.footer-contact-value--text {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--mute);
}

.footer-stamp {
  align-self: stretch;
  padding-left: 18px;
  border-left: 1px dashed var(--line);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: rgba(143, 166, 196, 0.7);
}

.footer-legal {
  border-top: 1px solid var(--line);
  padding-block: 18px;
}
.footer-legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: #6F86A6;
}
.footer-legal-item { white-space: nowrap; }

/* ---------- 8. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-stamp { display: none; }
}

@media (max-width: 980px) {
  :root { --header-h: 92px; }

  .header-rail { height: 30px; }
  .rail-meta { display: none; }
  .header-main { height: 62px; }

  .brand {
    position: relative;
    z-index: 140;
    gap: 10px;
  }
  .brand-mark { width: 34px; height: 34px; box-shadow: 3px 3px 0 0 var(--cyan); }
  .brand-name { font-size: 0.98rem; }
  .brand-tag { font-size: 0.6rem; letter-spacing: 0.2em; }

  .nav-toggle {
    display: inline-flex;
    position: relative;
    z-index: 150;
  }

  .primary-nav {
    position: fixed;
    inset: 0;
    z-index: 120;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: calc(var(--header-h) + 26px) var(--gutter) 40px;
    background: var(--ink);
    border-top: 3px solid var(--cyan);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.18s linear, transform 0.18s linear,
                visibility 0.18s linear;
  }
  .primary-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    counter-reset: navi;
  }
  .nav-list > li {
    counter-increment: navi;
    border-bottom: 1px solid var(--line);
  }
  .nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 18px 0;
    font-size: clamp(1.2rem, 4.4vw, 1.7rem);
    font-weight: 700;
    letter-spacing: -0.01em;
    transform: none;
  }
  .nav-link::before {
    content: "0" counter(navi);
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: var(--gold);
  }
  .nav-link::after { display: none; }
  .nav-link:hover { transform: none; color: var(--paper); }
  .nav-link[aria-current="page"]::after {
    display: block;
    position: static;
    width: 18px;
    height: 2px;
    margin-left: auto;
    background: var(--cyan);
    transform: none;
  }

  .nav-cta {
    margin-top: 28px;
    width: 100%;
    padding: 1em;
    font-size: 0.88rem;
  }
}

@media (max-width: 820px) {
  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-legal-inner { flex-direction: column; align-items: flex-start; }
  .footer-stamp { display: none; }
}

/* ---------- 9. 动效降级 ---------- */
@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;
  }
  .rail-dot { animation: none; }
  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .nav-link:hover,
  .footer-link:hover,
  .btn:hover { transform: none; }
}