/* =========================================================
   买球体育 · Site Kit 共享样式 /assets/site.css
   设计语言：数据叙事 · 控制台面板 · 精密网格
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --color-dark: #0B1F3A;
  --color-dark-deep: #060D1E;
  --color-dark-soft: #13294A;
  --color-gold: #F0B429;
  --color-gold-dark: #C9931A;
  --color-teal: #00C2A8;
  --color-bg-light: #F2F4F7;
  --color-white: #FFFFFF;
  --color-text: #1A202C;
  --color-text-secondary: #4A5568;
  --color-border: #D9E0E8;
  --color-border-dark: rgba(255,255,255,0.14);
  --color-success: #22C55E;
  --color-alert: #EF4444;

  --font-heading: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --font-mono: "SF Mono", Consolas, monospace;

  --container-max: 1200px;
  --container-pad: 24px;
  --header-h: 72px;
  --topbar-h: 36px;
  --header-total: calc(var(--topbar-h) + var(--header-h));
}

/* ---------- 2. Reset 与基础 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-total) + 8px);
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-text);
  background: var(--color-bg-light);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

ul, ol {
  list-style: none;
}

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

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

/* 正文链接 */
.main-content a {
  color: var(--color-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(11,31,58,0.25);
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}
.main-content a:hover {
  color: var(--color-gold-dark);
  text-decoration-color: var(--color-gold);
}

/* ---------- 3. 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-dark);
}

h1 { font-size: 40px; font-weight: 900; letter-spacing: -0.01em; }
h2 { font-size: 28px; font-weight: 900; letter-spacing: -0.005em; }
h3 { font-size: 20px; font-weight: 700; }
p { margin-bottom: 16px; }

.mono {
  font-family: var(--font-mono);
  font-size: 0.875em;
  letter-spacing: 0.03em;
}

.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;
}

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

.main-content {
  display: block;
  min-height: 60vh;
}

/* 页面顶区基类：自动扣除固定页头 */
.hero,
.page-head {
  background: var(--color-dark);
  color: rgba(255,255,255,0.85);
  padding-top: calc(var(--header-total) + 48px);
  padding-bottom: 56px;
}

.hero {
  min-height: calc(100vh - var(--header-total));
  display: flex;
  align-items: center;
}

.page-head {
  padding-bottom: 40px;
}

/* ---------- 5. 聚焦可见 ---------- */
:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

/* ---------- 6. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -48px;
  left: 16px;
  z-index: 2100;
  padding: 10px 18px;
  background: var(--color-gold);
  color: var(--color-dark);
  font-weight: 700;
  font-size: 14px;
  transition: top 0.2s ease;
}
.skip-link:focus-visible {
  top: 12px;
}

/* ---------- 7. 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1500;
  width: 100%;
  height: 3px;
  pointer-events: none;
  background: transparent;
}
.scroll-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-gold), var(--color-teal));
}

/* ---------- 8. 页头 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 100%;
  background-color: transparent;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header[data-scrolled="true"] {
  background-color: var(--color-dark);
  box-shadow: 0 4px 24px rgba(6,13,30,0.28);
}

/* 顶部状态栏 */
.header-topbar {
  background: rgba(6,13,30,0.82);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: var(--topbar-h);
}
.topbar-status {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
  font-size: 12px;
  color: rgba(255,255,255,0.78);
}
.topbar-status-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar-label {
  font-weight: 500;
}
.topbar-meta {
  flex-shrink: 0;
  font-size: 11px;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.06em;
}
.status-dot {
  flex-shrink: 0;
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
}
.status-dot--live {
  background: var(--color-success);
  box-shadow: 0 0 0 3px rgba(34,197,94,0.18);
}

/* 主导航 */
.header-main {
  position: relative;
}
.header-main-inner {
  display: flex;
  align-items: center;
  min-height: var(--header-h);
  gap: 20px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-gold);
  color: var(--color-dark);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
}
.brand-text {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 900;
  color: var(--color-white);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

/* 导航 */
.site-nav {
  margin-left: auto;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-link {
  display: inline-block;
  position: relative;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  transition: color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.3s ease;
}
.nav-link:hover {
  color: var(--color-gold);
}
.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left center;
}
.nav-link[aria-current="page"] {
  color: var(--color-gold);
}

/* 版本徽章 */
.version-badge {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--color-teal);
  border: 1px solid rgba(0,194,168,0.5);
  background: rgba(0,194,168,0.06);
  white-space: nowrap;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid var(--color-border-dark);
  background: transparent;
  padding: 0;
  transition: border-color 0.2s ease;
}
.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-white);
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav-toggle:hover {
  border-color: var(--color-gold);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 9. 页脚 ---------- */
.site-footer {
  background: var(--color-dark-deep);
  color: rgba(255,255,255,0.75);
  border-top: 4px solid var(--color-gold);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.1fr 2.2fr;
  gap: 56px;
  padding-top: 56px;
  padding-bottom: 48px;
}

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

.brand--footer .brand-mark {
  width: 46px;
  height: 46px;
  font-size: 16px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}
.brand--footer .brand-text {
  font-size: 22px;
}

.footer-en {
  font-size: 12px;
  color: rgba(255,255,255,0.45);
}
.footer-slogan {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.6);
  max-width: 32em;
}
.footer-trust {
  padding: 8px 12px;
  font-size: 12px;
  color: rgba(255,255,255,0.45);
  background: rgba(255,255,255,0.04);
  border-left: 2px solid var(--color-teal);
  line-height: 1.6;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.95);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.col-index {
  font-size: 12px;
  color: var(--color-gold);
}

.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-links a:hover {
  color: var(--color-gold);
  padding-left: 4px;
}

.footer-address {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  margin: 12px 0 0;
  line-height: 1.6;
}

.footer-note {
  font-size: 12px;
  line-height: 1.6;
  color: rgba(255,255,255,0.4);
  margin-top: 14px;
}

.footer-bottom {
  background: rgba(0,0,0,0.35);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 16px;
  padding-bottom: 16px;
  font-size: 12px;
  color: rgba(255,255,255,0.42);
}

/* ---------- 10. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 26px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  border: 2px solid var(--color-dark);
  background: transparent;
  color: var(--color-dark);
  cursor: pointer;
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}
.btn:hover {
  background: var(--color-dark);
  color: var(--color-white);
}
.btn--primary {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-dark);
}
.btn--primary:hover {
  background: var(--color-dark);
  border-color: var(--color-dark);
  color: var(--color-gold);
}
.btn--ghost {
  border-color: rgba(255,255,255,0.45);
  color: var(--color-white);
}
.btn--ghost:hover {
  border-color: var(--color-gold);
  background: transparent;
  color: var(--color-gold);
}
.btn--small {
  padding: 7px 16px;
  font-size: 13px;
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 16px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-secondary);
}
.breadcrumbs a {
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}
.breadcrumbs a:hover {
  color: var(--color-gold-dark);
}
.breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: #B0B8C4;
}
.breadcrumbs [aria-current="page"] {
  color: var(--color-text);
}

/* ---------- 12. 栅格 ---------- */
.grid {
  display: grid;
  gap: 24px;
}
.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)); }

/* ---------- 13. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.media-frame::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  z-index: 2;
  width: 44px;
  height: 44px;
  border-top: 3px solid var(--color-gold);
  border-left: 3px solid var(--color-gold);
}
.media-frame::after {
  content: "";
  position: absolute;
  bottom: -1px;
  right: -1px;
  z-index: 2;
  width: 44px;
  height: 44px;
  border-bottom: 3px solid var(--color-teal);
  border-right: 3px solid var(--color-teal);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.media-frame:hover img {
  transform: scale(1.02);
}

/* ---------- 14. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  line-height: 1.6;
  color: var(--color-text-secondary);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 2px;
}
.tag--gold {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-dark);
  font-weight: 700;
}
.tag--teal {
  background: rgba(0,194,168,0.1);
  border-color: rgba(0,194,168,0.45);
  color: #007F6E;
}
.tag--dark {
  background: var(--color-dark);
  border-color: var(--color-dark);
  color: var(--color-white);
}

/* ---------- 15. 面板与数据说明 ---------- */
.data-note {
  display: inline-block;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-gold);
}

.panel {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 24px;
}
.panel--hoverable {
  transition: border-color 0.22s ease, box-shadow 0.22s ease;
}
.panel--hoverable:hover {
  border-color: var(--color-gold);
  box-shadow: 0 6px 20px rgba(11,31,58,0.08);
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1024px) {
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    margin-left: 0;
    background: var(--color-dark);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.32s ease;
    box-shadow: 0 16px 32px rgba(6,13,30,0.3);
  }
  .site-nav[data-open="true"] {
    max-height: 440px;
    border-bottom: 3px solid var(--color-teal);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
  }
  .nav-link {
    display: block;
    padding: 13px 24px;
    font-size: 15px;
    color: rgba(255,255,255,0.85);
    border-left: 3px solid transparent;
  }
  .nav-link::after {
    display: none;
  }
  .nav-link[aria-current="page"] {
    border-left-color: var(--color-gold);
    background: rgba(240,180,41,0.07);
    color: var(--color-gold);
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
    padding-top: 44px;
  }
}

@media (max-width: 640px) {
  .container {
    padding-inline: 16px;
  }

  h1 { font-size: 28px; }
  h2 { font-size: 22px; }
  h3 { font-size: 18px; }

  .hero,
  .page-head {
    padding-top: calc(var(--header-total) + 32px);
    padding-bottom: 40px;
  }

  .topbar-label {
    display: none;
  }
  .topbar-meta {
    display: none;
  }

  .version-badge {
    display: none;
  }
  .header-main-inner {
    gap: 12px;
  }
  .brand-text {
    font-size: 16px;
  }
  .brand-mark {
    width: 32px;
    height: 32px;
    font-size: 12px;
  }

  .footer-columns {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .footer-col:last-child {
    grid-column: 1 / -1;
  }
  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .footer-columns {
    grid-template-columns: 1fr;
  }
  .footer-col:last-child {
    grid-column: auto;
  }
  .footer-top {
    padding-top: 36px;
  }
}

/* ---------- 17. 动效偏好 ---------- */
@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;
  }
  .media-frame:hover img {
    transform: none;
  }
}