/* ============================================
   博喜体育中国站 · 共享样式
   视觉基调：深海蓝基座 + 电光绿数据 + 活力橙入口
   ============================================ */

/* ---------- 变量 ---------- */
:root {
  --c-blue: #0A1F44;
  --c-ivory: #F5F0E8;
  --c-gray: #7A8B99;
  --c-clay: #C65D3C;
  --c-moss: #3E6B57;
  --c-neon: #39FF14;
  --c-orange: #FF6B35;
  --c-ink: #12181F;
  --c-slate: #2F4F6F;

  --font-heading: Impact, 'Archivo Black', 'Noto Sans SC', sans-serif;
  --font-body: 'JetBrains Mono', 'Noto Sans SC', monospace;

  --container-max: 1200px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 2rem;
  --space-4: 4rem;
  --space-5: 6rem;
  --radius: 2px;
  --stripe-h: 4px;

  accent-color: var(--c-orange);
}

/* ---------- Reset 与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: #2b3542;
  background-color: var(--c-ivory);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.15;
  color: var(--c-blue);
  margin-top: 0;
  margin-bottom: 0.5em;
}
h1 { font-size: clamp(3rem, 8vw, 6rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.5rem; }

p { margin-top: 0; }
ul, ol { margin-top: 0; }

a {
  color: var(--c-blue);
  text-underline-offset: 4px;
}
a:hover {
  color: var(--c-clay);
}

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

address {
  font-style: normal;
}

[id] {
  scroll-margin-top: 2rem;
}

/* ---------- 布局容器 ---------- */
.container {
  width: min(100% - 3rem, var(--container-max));
  margin-inline: auto;
}
.container-narrow {
  width: min(100% - 3rem, 720px);
  margin-inline: auto;
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: var(--space-3);
}
.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)); }

/* ---------- 章节 ---------- */
.section {
  padding-block: var(--space-4);
}
.section + .section {
  border-top: 1px solid rgba(18, 24, 31, 0.08);
}
.section.section-dark {
  border-top: 0;
}
.section-dark {
  background-color: var(--c-blue);
  background-image:
    linear-gradient(rgba(245, 240, 232, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 240, 232, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--c-ivory);
}
.section-dark .section-sub {
  color: rgba(245, 240, 232, 0.65);
}
.section-title {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--c-blue);
}
.section-title::before {
  content: "";
  flex: 0 0 auto;
  width: 0.5em;
  height: 0.5em;
  background: var(--c-orange);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 25% 100%);
}
.section-dark .section-title {
  color: var(--c-ivory);
}
.section-dark .section-title::before {
  background: var(--c-neon);
}
.section-title-light {
  color: var(--c-ivory);
}
.section-sub {
  max-width: 60ch;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--c-gray);
  margin-bottom: 0;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  line-height: 1;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}
.btn-orange {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-ink);
}
.btn-orange:hover,
.btn-orange:focus-visible {
  background: var(--c-blue);
  border-color: var(--c-blue);
  color: var(--c-ivory);
  transform: translateY(-2px);
}
.btn-ghost-light {
  background: transparent;
  border-color: rgba(245, 240, 232, 0.35);
  color: var(--c-ivory);
}
.btn-ghost-light:hover,
.btn-ghost-light:focus-visible {
  border-color: var(--c-ivory);
  background: rgba(245, 240, 232, 0.1);
  color: var(--c-ivory);
}
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
}
.btn-arrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1;
  transition: transform 0.2s;
}
.btn:hover .btn-arrow,
.btn:focus-visible .btn-arrow {
  transform: translateX(3px);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.625rem;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  border-radius: var(--radius);
}
.tag-live { color: var(--c-neon); }
.tag-warn { color: var(--c-orange); }
.tag-neutral { color: var(--c-gray); }
.tag-live::before,
.tag-warn::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
}
.tag-live::before { background: var(--c-neon); }
.tag-warn::before { background: var(--c-orange); }

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  padding: var(--space-3);
  background: var(--c-ivory);
  border: 1px solid rgba(18, 24, 31, 0.08);
  border-top: 3px solid var(--c-orange);
  border-radius: var(--radius);
  box-shadow: 0 2px 8px rgba(10, 31, 68, 0.06);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(10, 31, 68, 0.12);
}
.card-dark {
  background: var(--c-blue);
  border-color: rgba(245, 240, 232, 0.1);
  border-top-color: var(--c-neon);
  color: var(--c-ivory);
}
.card-dark .section-title,
.card-dark .section-sub {
  color: var(--c-ivory);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--c-gray);
}
.breadcrumb li {
  display: inline-flex;
  align-items: center;
}
.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.375rem;
  color: var(--c-gray);
  opacity: 0.6;
}
.breadcrumb a {
  color: var(--c-gray);
  text-decoration: none;
  transition: color 0.2s;
}
.breadcrumb a:hover {
  color: var(--c-orange);
}

/* ---------- 正文排版 ---------- */
.prose {
  max-width: 68ch;
  line-height: 1.75;
}
.prose h2,
.prose h3 {
  margin-top: var(--space-3);
  scroll-margin-top: 2rem;
}
.prose ul,
.prose ol {
  padding-left: 1.25em;
}
.prose blockquote {
  margin-left: 0;
  padding-left: var(--space-2);
  border-left: 4px solid var(--c-neon);
  color: var(--c-gray);
}

/* ---------- 图片占位 ---------- */
.img-frame {
  position: relative;
  overflow: hidden;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: var(--c-slate);
  background-image:
    linear-gradient(rgba(245, 240, 232, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 240, 232, 0.06) 1px, transparent 1px);
  background-size: 16px 16px;
  border-radius: var(--radius);
}
.img-frame::after {
  content: "IMG";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-heading);
  font-size: 2rem;
  letter-spacing: 0.15em;
  color: rgba(245, 240, 232, 0.25);
}
.img-frame img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}
.img-frame-wide {
  aspect-ratio: 16 / 9;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -120%;
  left: 1rem;
  z-index: 1000;
  background: var(--c-orange);
  color: var(--c-ink);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  transition: top 0.2s ease;
}
.skip-link:focus-visible {
  top: 1rem;
}

/* ---------- 页头 ---------- */
.site-header {
  position: relative;
  background-color: var(--c-blue);
  background-image:
    linear-gradient(rgba(245, 240, 232, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 240, 232, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--c-ivory);
}
.site-header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: var(--stripe-h);
  background: linear-gradient(90deg,
    var(--c-orange) 0%, var(--c-orange) 32%,
    var(--c-ink) 32%, var(--c-ink) 68%,
    var(--c-neon) 68%, var(--c-neon) 100%);
  z-index: 2;
}
.site-header .container {
  position: relative;
  z-index: 1;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: var(--space-2);
  border-bottom: 1px solid rgba(245, 240, 232, 0.08);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.25rem 0.75rem;
  text-decoration: none;
  color: var(--c-ivory);
}
.brand:hover,
.brand:focus-visible {
  color: var(--c-ivory);
}
.brand-name {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.brand-accent {
  color: var(--c-orange);
}
.brand-tagline {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  line-height: 1;
  text-transform: uppercase;
  color: var(--c-gray);
  border-left: 1px solid rgba(122, 139, 153, 0.4);
  padding-left: 0.75rem;
  white-space: nowrap;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: var(--c-gray);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}
.meta-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-neon);
  box-shadow: 0 0 6px rgba(57, 255, 20, 0.7);
  animation: pulse-dot 2s ease-in-out infinite;
}
.meta-sep {
  width: 1px;
  height: 14px;
  background: rgba(122, 139, 153, 0.35);
}
.meta-item-text {
  color: rgba(245, 240, 232, 0.75);
}

.header-bottom {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: 0.375rem;
}

.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-item {
  margin: 0;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.875rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  line-height: 1.2;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--c-ivory);
  border-left: 3px solid transparent;
  transition: color 0.2s;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0.875rem;
  right: 0.875rem;
  bottom: 0.25rem;
  height: 2px;
  background: var(--c-neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s;
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-neon);
}
.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}
.nav-link[aria-current="page"] {
  color: var(--c-orange);
}
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c-orange);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.875rem;
  background: transparent;
  border: 1px solid rgba(245, 240, 232, 0.2);
  border-radius: var(--radius);
  color: var(--c-ivory);
  cursor: pointer;
}
.nav-toggle:hover {
  border-color: rgba(245, 240, 232, 0.5);
}
.nav-toggle-line {
  position: relative;
  display: inline-block;
  width: 16px;
  height: 2px;
  background: var(--c-orange);
  transition: background-color 0.2s;
}
.nav-toggle-line::before,
.nav-toggle-line::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--c-ivory);
  transition: transform 0.2s, top 0.2s;
}
.nav-toggle-line::before { top: -5px; }
.nav-toggle-line::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-line {
  background: transparent;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line::before {
  top: 0;
  transform: rotate(45deg);
  background: var(--c-orange);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line::after {
  top: 0;
  transform: rotate(-45deg);
  background: var(--c-orange);
}
.nav-toggle-text {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.header-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-neon));
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 300;
  pointer-events: none;
  transition: transform 0.08s linear;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--space-5);
  background-color: var(--c-ink);
  background-image:
    radial-gradient(ellipse at top right, rgba(10, 31, 68, 0.65), transparent 55%),
    linear-gradient(rgba(245, 240, 232, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 240, 232, 0.025) 1px, transparent 1px);
  background-size: auto, 32px 32px, 32px 32px;
  color: var(--c-ivory);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--stripe-h);
  background: linear-gradient(90deg,
    var(--c-neon) 0%, var(--c-neon) 18%,
    var(--c-ink) 18%, var(--c-ink) 82%,
    var(--c-orange) 82%, var(--c-orange) 100%);
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 1.2fr;
  gap: var(--space-4);
  padding-block: var(--space-4) var(--space-3);
}
.brand-footer {
  margin-bottom: 0.75rem;
}
.footer-note {
  max-width: 42ch;
  font-family: var(--font-body);
  font-size: 0.75rem;
  line-height: 1.75;
  color: var(--c-gray);
  margin-bottom: 0.875rem;
}
.footer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-col {
  font-size: 0.8125rem;
}
.footer-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-ivory);
  margin-bottom: 0.875rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(122, 139, 153, 0.25);
}
.footer-links {
  list-style: none;
  margin: 0 0 var(--space-2);
  padding: 0;
}
.footer-links li {
  margin-bottom: 0.125rem;
}
.footer-links a {
  display: inline-block;
  padding-block: 0.25rem;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  text-decoration: none;
  color: var(--c-gray);
  transition: color 0.2s, padding-left 0.2s;
}
.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--c-orange);
  padding-left: 0.5rem;
}
.footer-address {
  display: grid;
  gap: 0.25rem;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  line-height: 1.6;
  color: var(--c-gray);
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-block: 1rem;
  border-top: 1px solid rgba(245, 240, 232, 0.08);
  font-family: var(--font-body);
  font-size: 0.6875rem;
  color: var(--c-gray);
}

/* ---------- 焦点与可访问性 ---------- */
:focus-visible {
  outline: 3px solid var(--c-neon);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand-col {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .header-top {
    flex-wrap: wrap;
    padding-block: 0.875rem;
  }
  .header-meta {
    display: none;
  }
  .header-bottom {
    flex-wrap: wrap;
    justify-content: flex-end;
  }
  .nav-toggle {
    display: inline-flex;
    order: 0;
  }
  .header-tools {
    order: 1;
  }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    background: var(--c-blue);
    border-top: 1px solid rgba(245, 240, 232, 0.1);
    border-bottom: 1px solid rgba(245, 240, 232, 0.1);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
    z-index: 50;
  }
  .nav[data-open] {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem;
  }
  .nav-link {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
  }
  .nav-link::after {
    display: none;
  }
  .nav-link[aria-current="page"] {
    border-left-color: var(--c-orange);
    background: rgba(255, 107, 53, 0.08);
  }
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .section {
    padding-block: var(--space-3);
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding-block: var(--space-3);
  }
  .footer-brand-col {
    grid-column: auto;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 400px) {
  .brand-tagline {
    display: none;
  }
  .brand-name {
    font-size: 1.375rem;
  }
}

/* ---------- 减弱动效 ---------- */
@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;
  }
  .header-progress {
    display: none;
  }
}