/* =========================================================
   欧虎体育 race-ouhuang.com.cn 全站共享样式
   ========================================================= */

/* ---------- CSS 变量 ---------- */
:root {
  --color-bg: #0a1128;
  --color-panel: #131c33;
  --color-primary: #ff4d00;
  --color-accent: #ffd200;
  --color-silver: #c0c5ce;
  --color-text: #f8f9fa;
  --color-text-dim: #b0b7c3;
  --color-success: #00e676;
  --color-danger: #ff1744;
  --color-glass: rgba(255, 255, 255, 0.08);
  --color-border: rgba(192, 197, 206, 0.2);

  --font-headline: Impact, "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: Inter, Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;

  --fs-display: clamp(3rem, 8vw, 6rem);
  --fs-h1: clamp(2rem, 5vw, 3.5rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.5rem);
  --fs-h3: 1.25rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  --header-h: 4.5rem;
  --ticker-h: 2.25rem;
  --container-w: 1200px;
  --radius-sm: 3px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --shadow-micro: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

ul,
ol {
  list-style: none;
}

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

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

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

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--color-text);
  background:
    linear-gradient(rgba(192, 197, 206, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(192, 197, 206, 0.03) 1px, transparent 1px),
    radial-gradient(1200px 500px at 85% -10%, rgba(255, 77, 0, 0.08), transparent 60%),
    radial-gradient(900px 400px at -20% 20%, rgba(255, 210, 0, 0.04), transparent 50%),
    var(--color-bg);
  background-size: 60px 60px, 60px 60px, auto, auto, auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-wrap: balance;
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p {
  margin-bottom: var(--space-4);
}

::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

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

/* ---------- 工具类 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: var(--space-16);
  position: relative;
}

.page-wrap {
  flex: 1 0 auto;
  width: 100%;
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + var(--ticker-h) + var(--space-4));
}

/* ---------- 可访问性 ---------- */
.skip-link {
  position: fixed;
  top: -100%;
  left: var(--space-4);
  z-index: 300;
  padding: var(--space-2) var(--space-6);
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 700;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  transition: top 0.25s var(--ease);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 300;
  background: rgba(192, 197, 206, 0.08);
  pointer-events: none;
}

.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left center;
}

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 17, 40, 0.85);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(135deg, var(--color-primary) 20%, #ff7a1a 100%);
  border-radius: var(--radius-sm);
  font-family: var(--font-headline);
  font-style: italic;
  font-size: 1.125rem;
  color: var(--color-bg);
  transform: skewX(-8deg);
  box-shadow: 0 4px 14px rgba(255, 77, 0, 0.35);
}

.brand-text {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  text-shadow: 0 2px 8px rgba(255, 210, 0, 0.15);
}

/* 主导航 */
.site-nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.site-nav-link {
  display: block;
  position: relative;
  padding: var(--space-2) var(--space-4);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-silver);
  letter-spacing: 0.03em;
  transition: color 0.2s var(--ease);
}

.site-nav-link::after {
  content: "";
  position: absolute;
  left: var(--space-4);
  right: var(--space-4);
  bottom: 0.15rem;
  height: 2px;
  background: var(--color-primary);
  transform: skewX(-30deg) scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s var(--ease);
}

.site-nav-link:hover,
.site-nav-link[aria-current="page"] {
  color: var(--color-text);
}

.site-nav-link:hover::after,
.site-nav-link[aria-current="page"]::after {
  transform: skewX(-30deg) scaleX(1);
}

/* 移动端导航按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.6rem;
  background: var(--color-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-accent);
  border-radius: 2px;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

/* 头部实时信息条 */
.header-ticker {
  position: relative;
  height: var(--ticker-h);
  border-top: 1px solid rgba(192, 197, 206, 0.12);
  background: rgba(19, 28, 51, 0.55);
  font-size: var(--fs-small);
  color: var(--color-text-dim);
}

.header-ticker::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 220px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  pointer-events: none;
}

.ticker-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: 100%;
  white-space: nowrap;
  overflow: hidden;
}

.ticker-clock {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--color-text);
}

.ticker-clock::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: var(--space-2);
  background: var(--color-primary);
  transform: rotate(45deg);
  vertical-align: middle;
}

.ticker-divider {
  width: 1px;
  height: 12px;
  background: var(--color-border);
  flex-shrink: 0;
}

.ticker-live {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-weight: 600;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
  animation: livePulse 1.6s ease-in-out infinite;
}

@keyframes livePulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(255, 77, 0, 0.5);
  }
  50% {
    opacity: 0.6;
    box-shadow: 0 0 0 5px rgba(255, 77, 0, 0);
  }
}

.score-num {
  color: var(--color-primary);
  font-weight: 800;
  font-size: 1.0625rem;
  font-variant-numeric: tabular-nums;
  padding-inline: 2px;
}

.ticker-period {
  margin-left: var(--space-1);
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: 700;
}

.ticker-updated {
  margin-left: auto;
  color: var(--color-text-dim);
}

.ticker-updated::before {
  content: "✓ ";
  color: var(--color-success);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all 0.2s var(--ease);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text);
  box-shadow: 0 4px 18px rgba(255, 77, 0, 0.3);
}

.btn-primary:hover {
  background: #ff6a1a;
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(255, 77, 0, 0.45);
}

.btn-outline {
  background: transparent;
  border-color: rgba(192, 197, 206, 0.4);
  color: var(--color-silver);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  font-size: var(--fs-small);
  color: var(--color-text-dim);
}

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

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: var(--space-2);
  color: rgba(176, 183, 195, 0.4);
}

.breadcrumb-link {
  color: var(--color-silver);
  transition: color 0.2s var(--ease);
}

.breadcrumb-link:hover {
  color: var(--color-accent);
}

.breadcrumb-item[aria-current="page"] {
  color: var(--color-accent);
  font-weight: 600;
}

/* ---------- 页面标题区 ---------- */
.page-heading {
  padding-block: var(--space-12) var(--space-8);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-8);
}

.page-title {
  font-size: var(--fs-h1);
  margin-bottom: var(--space-2);
}

.page-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-dim);
  max-width: 56ch;
}

/* ---------- 编号章节 ---------- */
.chapter {
  position: relative;
  padding-block: var(--space-16);
}

.chapter-num {
  font-family: var(--font-headline);
  font-style: italic;
  font-size: var(--fs-display);
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1px rgba(192, 197, 206, 0.25);
  user-select: none;
}

.chapter-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.chapter-label::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), transparent);
}

/* ---------- 卡片 ---------- */
.glass-panel {
  position: relative;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  padding: 0.2em 0.65em;
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  background: rgba(255, 210, 0, 0.08);
  border: 1px solid rgba(255, 210, 0, 0.3);
  border-radius: 2px;
}

.tag-orange {
  color: var(--color-primary);
  background: rgba(255, 77, 0, 0.08);
  border-color: rgba(255, 77, 0, 0.3);
}

/* ---------- 数据胶囊 ---------- */
.data-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.3rem 0.85rem;
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 99px;
  font-variant-numeric: tabular-nums;
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: var(--space-6);
}

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

/* ---------- 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: linear-gradient(145deg, var(--color-panel), rgba(19, 28, 51, 0.5));
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s var(--ease);
}

.media:hover img {
  transform: scale(1.03);
}

.media-16-9 { aspect-ratio: 16 / 9; }
.media-4-3 { aspect-ratio: 4 / 3; }
.media-1-1 { aspect-ratio: 1 / 1; }

/* ---------- 装饰 ---------- */
.diag-line {
  display: block;
  width: 3.5rem;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  transform: skewX(-25deg);
}

/* ---------- 正文排版 ---------- */
.prose {
  line-height: 1.85;
}

.prose ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: var(--space-4);
}

.prose ol {
  list-style: decimal;
  padding-left: 1.5rem;
  margin-bottom: var(--space-4);
}

.prose li {
  margin-bottom: var(--space-2);
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: auto;
  background:
    linear-gradient(120deg, rgba(255, 77, 0, 0.05) 0%, transparent 35%),
    linear-gradient(180deg, var(--color-bg) 0%, #060a1c 100%);
  border-top: 1px solid var(--color-border);
}

.footer-accent {
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 30%, transparent 70%);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr 1fr;
  gap: var(--space-12);
  padding-block: var(--space-16);
}

.footer-heading {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  position: relative;
}

.footer-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 2rem;
  height: 2px;
  background: var(--color-primary);
  transform: skewX(-30deg);
}

.brand-footer {
  margin-bottom: var(--space-4);
}

.brand-footer .brand-mark {
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  color: var(--color-bg);
  box-shadow: none;
  width: 2.25rem;
  height: 2.25rem;
  font-size: 1rem;
}

.brand-footer .brand-text {
  font-size: 1.375rem;
}

.footer-desc {
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--color-text-dim);
  max-width: 34ch;
  margin-bottom: var(--space-4);
}

.footer-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-small);
  color: var(--color-success);
  border: 1px solid rgba(0, 230, 118, 0.25);
  border-radius: 99px;
  padding: 0.25rem 0.75rem;
  background: rgba(0, 230, 118, 0.06);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  flex-shrink: 0;
}

.footer-links li,
.footer-contact li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  font-size: var(--fs-small);
  color: var(--color-text-dim);
  line-height: 1.6;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.footer-links a:hover {
  color: var(--color-accent);
  padding-left: var(--space-1);
}

.footer-contact li {
  font-size: var(--fs-small);
  color: var(--color-text-dim);
  line-height: 1.7;
}

.contact-label {
  display: inline-block;
  min-width: 1.75rem;
  margin-right: var(--space-2);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent);
}

.footer-note {
  margin-top: var(--space-4);
  font-size: 0.8125rem;
  color: rgba(176, 183, 195, 0.7);
  line-height: 1.6;
  border-left: 2px solid var(--color-primary);
  padding-left: var(--space-3);
}

.footer-icp {
  margin-top: var(--space-4);
  font-size: var(--fs-small);
  color: rgba(176, 183, 195, 0.7);
}

.footer-cert {
  font-size: 0.75rem;
  color: rgba(176, 183, 195, 0.6);
}

.footer-bottom {
  border-top: 1px solid rgba(192, 197, 206, 0.1);
  padding-block: var(--space-3);
  font-size: 0.8125rem;
  color: rgba(176, 183, 195, 0.6);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer-trust {
  margin-top: var(--space-2);
  font-size: 0.75rem;
  color: rgba(176, 183, 195, 0.5);
  line-height: 1.6;
}

/* ---------- 滚动显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 769px) and (max-width: 992px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer-brand-col {
    grid-column: 1 / -1;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--header-h) - var(--ticker-h));
    overflow-y: auto;
    background: rgba(10, 17, 40, 0.96);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .site-nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2) 0 var(--space-6);
  }

  .site-nav-link {
    padding: var(--space-4) var(--space-6);
    border-left: 3px solid transparent;
  }

  .site-nav-link::after {
    display: none;
  }

  .site-nav-link:hover,
  .site-nav-link[aria-current="page"] {
    background: rgba(255, 77, 0, 0.08);
    border-left-color: var(--color-primary);
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 3.75rem;
    --ticker-h: 2rem;
  }

  .header-ticker .ticker-updated {
    display: none;
  }

  .header-ticker::before {
    width: 120px;
  }

  .brand-text {
    font-size: 1.25rem;
  }

  .brand-mark {
    width: 2.25rem;
    height: 2.25rem;
    font-size: 1rem;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    padding-block: var(--space-8);
  }

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

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
}

@media (max-width: 480px) {
  .ticker-period,
  .ticker-divider {
    display: none;
  }

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

  .page-heading {
    padding-top: var(--space-8);
  }
}

/* ---------- 减少动态 ---------- */
@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;
  }

  .live-dot,
  .status-dot {
    animation: none !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .site-nav {
    transition: none;
  }
}