/* =====================================================================
   星空体育主站 · 共享样式
   路径：/assets/site.css
   职责：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件 / 响应式
   ===================================================================== */

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

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

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ol, ul, pre {
  margin: 0;
}

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

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

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

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

table { border-collapse: collapse; width: 100%; }

input, select, textarea { font: inherit; }

:focus-visible {
  outline: 2px solid #45D0C0;
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 2. 变量 ---------- */
:root {
  --sk-deep:       #040A17;
  --sk-deep-mid:   #071129;
  --sk-panel:      #0A1426;
  --sk-line:       #142339;
  --sk-hover:      #1B3A63;
  --sk-muted:      #8FA9C9;
  --sk-faint:      #5E7796;
  --sk-ink:        #E9EFF8;
  --sk-gold:       #F0C35A;
  --sk-cyan:       #45D0C0;
  --sk-orange:     #FF9440;

  --sk-max:        1180px;
  --sk-gutter:     clamp(16px, 4vw, 40px);
  --sk-radius:     2px;
  --sk-ease:       200ms cubic-bezier(.2, .6, .3, 1);
  --sk-ease-slow:  240ms cubic-bezier(.2, .6, .3, 1);

  --sk-font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --sk-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", "Courier New", monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--sk-font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--sk-ink);
  background-color: var(--sk-deep);
  background-image:
    radial-gradient(circle at 14% 6%, rgba(240, 195, 90, .10), transparent 44%),
    radial-gradient(circle at 88% 2%, rgba(69, 208, 192, .10), transparent 42%),
    radial-gradient(1.4px 1.4px at 22% 26%, rgba(233, 239, 248, .45) 50%, transparent 51%),
    radial-gradient(1px 1px at 66% 14%, rgba(233, 239, 248, .34) 50%, transparent 51%),
    radial-gradient(1px 1px at 88% 42%, rgba(233, 239, 248, .28) 50%, transparent 51%),
    radial-gradient(1.4px 1.4px at 38% 68%, rgba(233, 239, 248, .30) 50%, transparent 51%),
    radial-gradient(1px 1px at 8% 82%, rgba(233, 239, 248, .22) 50%, transparent 51%),
    radial-gradient(1.2px 1.2px at 74% 88%, rgba(233, 239, 248, .26) 50%, transparent 51%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background: rgba(240, 195, 90, .30);
  color: #FFFFFF;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: .01em;
  font-stretch: condensed;
  color: var(--sk-ink);
}

h1 { font-size: clamp(30px, 5.4vw, 54px); }
h2 { font-size: clamp(23px, 3.4vw, 34px); }
h3 { font-size: clamp(18px, 2.2vw, 23px); }

p { line-height: 1.75; }

.sk-mono {
  font-family: var(--sk-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
}

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

.sk-section {
  padding-block: clamp(44px, 7vw, 92px);
  position: relative;
}

.sk-prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--sk-ink);
}

.sk-prose p + p { margin-top: 1.05em; }

.sk-prose h2 {
  margin: 1.7em 0 .55em;
  font-size: clamp(22px, 3vw, 30px);
}

.sk-prose h3 {
  margin: 1.4em 0 .45em;
  color: var(--sk-gold);
  font-size: clamp(17px, 2vw, 20px);
}

.sk-prose ul { max-width: 68ch; }

.sk-prose ul li {
  position: relative;
  padding-left: 20px;
  margin-block: .42em;
}

.sk-prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--sk-cyan);
}

.sk-prose a {
  color: var(--sk-gold);
  border-bottom: 1px solid rgba(240, 195, 90, .35);
  transition: border-color var(--sk-ease), color var(--sk-ease);
}

.sk-prose a:hover { border-bottom-color: var(--sk-gold); }

.sk-prose strong { color: var(--sk-gold); font-weight: 700; }

.sk-link {
  position: relative;
  display: inline-block;
  color: var(--sk-gold);
  transition: color var(--sk-ease);
}

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

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

.sk-eyebrow {
  font-family: var(--sk-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--sk-cyan);
  margin-bottom: 12px;
}

.sk-annot {
  writing-mode: vertical-rl;
  font-family: var(--sk-mono);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--sk-muted);
  text-transform: uppercase;
}

.sk-rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--sk-line), rgba(20, 35, 57, 0));
}

/* ---------- 5. 按钮 ---------- */
.sk-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  background: transparent;
  color: var(--sk-ink);
  font-family: var(--sk-font);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  text-decoration: none;
  cursor: pointer;
  transition: border-color var(--sk-ease), background var(--sk-ease), color var(--sk-ease);
}

.sk-btn:hover,
.sk-btn:focus-visible {
  border-color: var(--sk-gold);
  color: var(--sk-gold);
  background: rgba(240, 195, 90, .07);
}

.sk-btn--gold {
  background: var(--sk-gold);
  border-color: var(--sk-gold);
  color: #08111F;
}

.sk-btn--gold:hover,
.sk-btn--gold:focus-visible {
  background: #F7D283;
  border-color: #F7D283;
  color: #08111F;
}

.sk-btn--ghost {
  border-color: transparent;
  color: var(--sk-muted);
  padding-inline: 10px;
}

.sk-btn--ghost:hover,
.sk-btn--ghost:focus-visible {
  border-color: var(--sk-line);
  color: var(--sk-ink);
  background: var(--sk-panel);
}

/* ---------- 6. 卡片与标签 ---------- */
.sk-card {
  position: relative;
  background: var(--sk-panel);
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  box-shadow: 0 18px 40px -32px rgba(0, 0, 0, .95);
  transition: border-color var(--sk-ease), background var(--sk-ease);
}

.sk-card:hover {
  border-color: rgba(240, 195, 90, .48);
}

.sk-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 20px;
  border-bottom: 1px solid var(--sk-line);
}

.sk-card__head h3,
.sk-card__head h2 { font-size: 17px; }

.sk-card__body { padding: 20px; }

.sk-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  background: var(--sk-panel);
  color: var(--sk-muted);
  font-family: var(--sk-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  cursor: pointer;
  transition: background var(--sk-ease), color var(--sk-ease), border-color var(--sk-ease);
}

.sk-tag:hover {
  background: var(--sk-hover);
  border-color: var(--sk-hover);
  color: var(--sk-ink);
}

.sk-tag[data-active],
.sk-tag[aria-pressed="true"] {
  background: var(--sk-hover);
  border-color: var(--sk-hover);
  color: var(--sk-ink);
}

.sk-tag--accent {
  border-color: rgba(240, 195, 90, .50);
  color: var(--sk-gold);
}

.sk-tag--data {
  border-color: rgba(69, 208, 192, .45);
  color: var(--sk-cyan);
}

/* ---------- 7. 面包屑 ---------- */
.sk-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin-bottom: 22px;
  font-family: var(--sk-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--sk-muted);
}

.sk-breadcrumb li { display: inline-flex; align-items: center; }

.sk-breadcrumb li + li::before {
  content: "›";
  margin-inline: 9px;
  color: var(--sk-line);
}

.sk-breadcrumb a {
  color: var(--sk-muted);
  transition: color var(--sk-ease);
}

.sk-breadcrumb a:hover { color: var(--sk-gold); }

.sk-breadcrumb [aria-current="page"] { color: var(--sk-ink); }

/* ---------- 8. 表格 ---------- */
.sk-table {
  width: 100%;
  font-family: var(--sk-mono);
  font-size: 13px;
  letter-spacing: .01em;
}

.sk-table th,
.sk-table td {
  padding: 11px 12px;
  text-align: left;
  border-bottom: 1px solid var(--sk-line);
  vertical-align: middle;
}

.sk-table thead th {
  color: var(--sk-cyan);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.sk-table tbody tr { transition: background var(--sk-ease); }

.sk-table tbody tr:hover { background: var(--sk-panel); }

.sk-table .is-num,
.sk-table th.is-num,
.sk-table td.is-num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ---------- 9. 图片容器（页面阶段放置图片） ---------- */
.sk-media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  background-image:
    radial-gradient(circle at 78% 16%, rgba(69, 208, 192, .11), transparent 56%),
    radial-gradient(circle at 12% 88%, rgba(240, 195, 90, .09), transparent 58%),
    linear-gradient(155deg, #0A1426 0%, #071129 58%, #040A17 100%);
  box-shadow: 0 24px 52px -36px rgba(0, 0, 0, .95);
}

.sk-media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    112deg,
    rgba(143, 169, 201, .07) 0 1px,
    transparent 1px 52px
  );
}

.sk-media img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sk-media--16x9 { aspect-ratio: 16 / 9; }
.sk-media--4x3  { aspect-ratio: 4 / 3; }
.sk-media--1x1  { aspect-ratio: 1 / 1; }
.sk-media--wide { aspect-ratio: 21 / 9; }

.sk-media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  padding: 10px 14px;
  font-family: var(--sk-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--sk-muted);
  background: linear-gradient(180deg, rgba(4, 10, 23, 0) 0%, rgba(4, 10, 23, .9) 100%);
}

/* ---------- 10. 跳转链接 ---------- */
.sk-skip {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 120;
  padding: 10px 16px;
  border-radius: var(--sk-radius);
  background: var(--sk-gold);
  color: #08111F;
  font-size: 14px;
  font-weight: 700;
  transition: top var(--sk-ease);
}

.sk-skip:focus {
  top: 12px;
}

/* ---------- 11. 页头 ---------- */
.sk-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, #040A17 0%, #071129 100%);
  border-bottom: 1px solid var(--sk-line);
}

.sk-header__brandbar {
  background: rgba(4, 10, 23, .72);
  border-bottom: 1px solid var(--sk-line);
}

.sk-brandbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(12px, 3vw, 32px);
  min-height: 66px;
  padding-block: 10px;
}

.sk-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  transition: opacity var(--sk-ease);
}

.sk-brand:hover { opacity: .88; }

.sk-brand__mark {
  flex: none;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--sk-gold);
  border-radius: var(--sk-radius);
  background: radial-gradient(circle at 30% 22%, rgba(240, 195, 90, .22), rgba(240, 195, 90, 0) 72%);
  color: var(--sk-gold);
  font-size: 15px;
  font-weight: 800;
  line-height: 1;
}

.sk-brand__text { display: block; min-width: 0; }

.sk-brand__name {
  display: block;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .05em;
  font-stretch: condensed;
  color: var(--sk-ink);
  white-space: nowrap;
}

.sk-brand__since {
  display: block;
  font-family: var(--sk-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--sk-muted);
  white-space: nowrap;
}

.sk-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--sk-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--sk-muted);
  min-width: 0;
}

.sk-status__dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sk-cyan);
  box-shadow: 0 0 0 4px rgba(69, 208, 192, .14);
}

.sk-status__label { color: var(--sk-cyan); white-space: nowrap; }
.sk-status__value { color: var(--sk-ink); white-space: nowrap; }
.sk-status__time  { color: var(--sk-faint); white-space: nowrap; }

.sk-navbar {
  position: relative;
  background: rgba(10, 20, 38, .68);
}

.sk-navbar__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 54px;
}

.sk-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.sk-nav__list {
  display: flex;
  align-items: stretch;
  gap: clamp(2px, 1.2vw, 10px);
  overflow-x: auto;
  scrollbar-width: none;
}

.sk-nav__list::-webkit-scrollbar { display: none; }

.sk-nav__link {
  position: relative;
  display: inline-block;
  padding: 17px 12px 16px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--sk-muted);
  white-space: nowrap;
  transition: color var(--sk-ease);
}

.sk-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 9px;
  height: 1px;
  background: var(--sk-gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--sk-ease);
}

.sk-nav__link:hover { color: var(--sk-ink); }
.sk-nav__link:hover::after { transform: scaleX(1); }

.sk-nav__link[aria-current="page"] { color: var(--sk-gold); }
.sk-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.sk-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 13px;
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  color: var(--sk-ink);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  cursor: pointer;
  transition: border-color var(--sk-ease), background var(--sk-ease), color var(--sk-ease);
}

.sk-nav-toggle:hover,
.sk-nav-toggle:focus-visible {
  border-color: var(--sk-gold);
  background: var(--sk-hover);
  color: var(--sk-gold);
}

.sk-nav-toggle__bars {
  position: relative;
  display: inline-block;
  width: 16px;
  height: 10px;
}

.sk-nav-toggle__bars::before,
.sk-nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--sk-ease);
}

.sk-nav-toggle__bars::before { top: 0; }
.sk-nav-toggle__bars::after { bottom: 0; }

.sk-nav-toggle[aria-expanded="true"] .sk-nav-toggle__bars::before {
  transform: translateY(4.25px) rotate(45deg);
}

.sk-nav-toggle[aria-expanded="true"] .sk-nav-toggle__bars::after {
  transform: translateY(-4.25px) rotate(-45deg);
}

.sk-nav-toggle__text { line-height: 1; }

/* 顶部滚动进度 */
.sk-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 80;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--sk-cyan) 0%, var(--sk-gold) 100%);
  pointer-events: none;
}

/* ---------- 12. 页脚 ---------- */
.sk-footer {
  margin-top: clamp(40px, 7vw, 96px);
  border-top: 1px solid var(--sk-line);
  background: linear-gradient(180deg, #040A17 0%, #02060F 100%);
  color: var(--sk-muted);
}

.sk-footer__inner {
  padding-top: clamp(36px, 6vw, 72px);
}

.sk-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  gap: clamp(24px, 4vw, 52px);
}

.sk-footer__col { min-width: 0; }

.sk-footer__col--brand { display: flex; flex-direction: column; gap: 14px; }

.sk-brand--footer { align-self: flex-start; }

.sk-footer__meta {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sk-faint);
  max-width: 34ch;
}

.sk-footer__title {
  margin-bottom: 16px;
  font-family: var(--sk-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--sk-cyan);
}

.sk-footer__list {
  display: grid;
  gap: 11px;
}

.sk-footer__list a {
  font-size: 14px;
  color: var(--sk-muted);
  transition: color var(--sk-ease), padding-left var(--sk-ease);
}

.sk-footer__list a:hover {
  color: var(--sk-gold);
  padding-left: 4px;
}

.sk-footer__list--contact { gap: 14px; }

.sk-footer__label {
  display: block;
  font-family: var(--sk-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--sk-faint);
}

.sk-footer__value {
  display: block;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--sk-ink);
  word-break: break-word;
}

.sk-footer__note {
  margin-top: 16px;
  padding-left: 12px;
  border-left: 1px solid rgba(240, 195, 90, .45);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--sk-muted);
}

.sk-footer__baseline {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 28px;
  margin-top: clamp(28px, 4vw, 52px);
  padding-block: 18px 28px;
  border-top: 1px solid var(--sk-line);
  font-family: var(--sk-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--sk-faint);
}

/* 返回顶部 */
.sk-to-top {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 70;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  background: var(--sk-panel);
  color: var(--sk-gold);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--sk-ease), visibility var(--sk-ease),
              border-color var(--sk-ease), background var(--sk-ease);
}

.sk-to-top[data-visible] {
  opacity: 1;
  visibility: visible;
}

.sk-to-top:hover,
.sk-to-top:focus-visible {
  border-color: var(--sk-gold);
  background: var(--sk-hover);
}

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1024px) {
  .sk-footer__grid {
    grid-template-columns: 1fr 1fr;
    row-gap: clamp(28px, 5vw, 44px);
  }
}

@media (max-width: 860px) {
  body { background-attachment: scroll; }

  .sk-brandbar {
    min-height: 58px;
    flex-wrap: nowrap;
  }

  .sk-status {
    gap: 8px;
    font-size: 11px;
  }

  .sk-status__label,
  .sk-status__time { display: none; }

  .sk-navbar__inner {
    position: relative;
    min-height: 50px;
  }

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

  .sk-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex: none;
    max-height: 0;
    overflow: hidden;
    background: #071129;
    border-bottom: 1px solid var(--sk-line);
    box-shadow: 0 26px 46px -30px rgba(0, 0, 0, .95);
    transition: max-height var(--sk-ease-slow);
  }

  .sk-nav[data-open] {
    max-height: min(72vh, 560px);
    overflow-y: auto;
  }

  .sk-nav__list {
    flex-direction: column;
    gap: 0;
    padding: 6px var(--sk-gutter) 14px;
    overflow: visible;
  }

  .sk-nav__link {
    display: block;
    padding: 14px 2px 13px;
    font-size: 15px;
    border-bottom: 1px solid var(--sk-line);
  }

  .sk-nav li:last-child .sk-nav__link { border-bottom: 0; }

  .sk-nav__link::after {
    left: 2px;
    right: auto;
    bottom: 8px;
    width: 28px;
  }
}

@media (max-width: 640px) {
  .sk-brand__mark { width: 30px; height: 30px; font-size: 14px; }
  .sk-brand__name { font-size: 15.5px; }
  .sk-brand__since { font-size: 10px; letter-spacing: .1em; }

  .sk-footer__grid { grid-template-columns: 1fr; }
  .sk-footer__baseline { font-size: 11px; }
  .sk-card__head { flex-wrap: wrap; }
}

@media (max-width: 400px) {
  .sk-brand__since { display: none; }
}

/* ---------- 14. 无障碍与动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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