/* ==========================================================================
   大江体育 site.css
   全站共享样式：变量 / 重置 / 排版 / 页头 / 页脚 / 通用组件 / 响应式
   ========================================================================== */

/* ---------- 变量 ---------- */
:root {
  --color-deep: #0A1628;
  --color-mid: #1C3150;
  --color-accent: #FF6B35;
  --color-neon: #39FF14;
  --color-light: #F5F7FA;
  --color-card: #E8EDF5;
  --color-border: #2C3E6B;
  --color-text-primary: #1A2B4C;
  --color-text-secondary: #6B7A93;
  --color-error: #D32F2F;
  --color-rail-text: #A9B7D3;

  --rail-w: 280px;
  --topbar-h: 56px;
  --content-max: 1200px;
  --base-gap: 20px;

  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto Mono", "Consolas", "SF Mono", Menlo, monospace;

  --z-header: 1000;
  --z-nav: 1100;
  --z-progress: 1200;
  --z-skip: 9999;

  --clip-btn: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  --clip-panel: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
  --clip-tag: polygon(5px 0, 100% 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%, 0 5px);
}

/* ---------- 重置与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-light);
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

a:hover {
  color: var(--color-accent);
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text-primary);
}

h1 { font-size: 32px; }
h2 { font-size: 24px; }
h3 { font-size: 20px; }
h4 { font-size: 18px; }

p {
  margin-bottom: 1em;
}

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

/* ---------- 基础组件 ---------- */
.data-num {
  font-family: var(--font-mono);
  font-size: 0.95em;
  font-variant-numeric: tabular-nums;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* ---------- 正文容器 ---------- */
.main-content {
  margin-left: var(--rail-w);
  padding-top: var(--topbar-h);
  min-height: calc(100vh - var(--topbar-h));
}

.page-body,
.page-body-narrow {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 32px 32px 88px;
}

.page-body-narrow {
  max-width: 780px;
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.1;
  color: #fff;
  background: var(--color-accent);
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  clip-path: var(--clip-btn);
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  color: #fff;
  background: #e6511d;
}

.btn-secondary {
  color: var(--color-accent);
  background: transparent;
  border-color: var(--color-accent);
}

.btn-secondary:hover {
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.08);
}

.btn-ghost {
  color: var(--color-text-primary);
  background: transparent;
  border-color: var(--color-border);
}

.btn-ghost:hover {
  color: var(--color-text-primary);
  background: rgba(26, 43, 76, 0.04);
  border-color: var(--color-text-primary);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

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

.breadcrumb-sep {
  color: var(--color-border);
  user-select: none;
}

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

/* ---------- 网格 ---------- */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ---------- 卡片 ---------- */
.card {
  padding: 22px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 3px;
}

.card-cut {
  clip-path: var(--clip-panel);
}

.card-dark {
  background: var(--color-deep);
  color: var(--color-rail-text);
  border-color: rgba(44, 62, 107, 0.6);
}

.card-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
}

.card-value {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-text-primary);
}

.card-dark .card-label {
  color: rgba(169, 183, 211, 0.7);
}

.card-dark .card-value {
  color: #fff;
}

/* 数据行 */
.metric-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  font-size: 14px;
  border-bottom: 1px dotted var(--color-border);
}

.metric-row:last-child {
  border-bottom: none;
}

/* 标签 */
.tag {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.08);
  border: 1px solid rgba(255, 107, 53, 0.22);
  clip-path: var(--clip-tag);
}

.tag-live {
  color: var(--color-neon);
  background: rgba(10, 22, 40, 0.85);
  border-color: rgba(57, 255, 20, 0.4);
}

/* ---------- 标签页 ---------- */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 2px solid var(--color-border);
}

.tab-btn {
  padding: 10px 18px;
  margin-bottom: -2px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
}

.tab-btn:hover {
  color: var(--color-text-primary);
}

.tab-btn[aria-selected="true"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.tab-panel {
  display: none;
}

.tab-panel[data-active] {
  display: block;
}

/* ---------- 数据表 ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--color-card);
}

.data-table th {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  text-align: left;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  border-bottom: 2px solid var(--color-border);
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table .num {
  font-family: var(--font-mono);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ---------- 图片容器（页面阶段放置占位图） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--color-mid);
  border: 1px solid var(--color-border);
  border-radius: 3px;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 22, 40, 0.3) 0%, rgba(10, 22, 40, 0) 60%);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.06);
}

.media-frame-motion::before {
  content: "";
  position: absolute;
  top: 0;
  left: -35%;
  width: 55%;
  height: 100%;
  z-index: 1;
  background: linear-gradient(105deg, transparent, rgba(255, 107, 53, 0.16), transparent);
  transform: skewX(-16deg);
  pointer-events: none;
}

.media-frame-portrait {
  aspect-ratio: 4 / 5;
}

/* ==========================================================================
   页头
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  display: grid;
  grid-template-columns: var(--rail-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  z-index: var(--z-header);
  pointer-events: none;
}

/* 跳过链接 */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: var(--z-skip);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: var(--color-accent);
  border-radius: 2px;
  clip-path: var(--clip-btn);
  transform: translateY(-160%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* 品牌轨道 */
.brand-rail {
  position: relative;
  grid-row: 1 / -1;
  grid-column: 1;
  display: flex;
  flex-direction: column;
  padding: 28px 20px 24px;
  background: var(--color-deep);
  border-right: 1px solid var(--color-border);
  pointer-events: auto;
}

/* 轨道右侧速度线 */
.brand-rail::before {
  content: "";
  position: absolute;
  top: 12%;
  bottom: 12%;
  right: -1px;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--color-accent) 25%, var(--color-accent) 55%, transparent 85%);
  opacity: 0.35;
}

/* 轨道右上切角标记 */
.brand-rail::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, var(--color-deep) 50%, var(--color-accent) 50%);
  opacity: 0.55;
}

.brand-mark {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  padding: 4px 2px 8px;
}

.brand-name {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.2;
  color: #fff;
  transition: color 0.18s ease;
}

.brand-mark:hover .brand-name {
  color: var(--color-accent);
}

.brand-en {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--color-text-secondary);
}

/* 轨道内导航 */
.rail-nav {
  display: flex;
  flex-direction: column;
  flex: 1;
  margin-top: 44px;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  list-style: none;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--color-rail-text);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 3px;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.06);
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: -2px;
}

.nav-link[aria-current="page"] {
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.1);
  border-color: rgba(255, 107, 53, 0.18);
}

.nav-link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 18%;
  bottom: 18%;
  width: 3px;
  background: var(--color-accent);
}

.nav-index {
  display: inline-block;
  width: 26px;
  min-width: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-secondary);
  transition: color 0.18s ease;
}

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

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

/* 轨道底部索引面板 */
.rail-foot {
  margin-top: auto;
  padding: 16px 14px;
  background: var(--color-mid);
  border: 1px solid var(--color-border);
  clip-path: var(--clip-panel);
}

.rail-foot-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.rail-foot-value {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-neon);
}

/* 内容顶栏 */
.content-topbar {
  position: relative;
  grid-row: 1;
  grid-column: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 28px;
  background: rgba(245, 247, 250, 0.92);
  border-bottom: 1px solid var(--color-border);
  pointer-events: auto;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.topbar-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  padding: 4px 10px;
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.08);
  border: 1px solid rgba(255, 107, 53, 0.2);
  clip-path: var(--clip-tag);
  white-space: nowrap;
}

.topbar-pretitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-live {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--color-neon);
  border-radius: 50%;
  box-shadow: 0 0 7px rgba(57, 255, 20, 0.6);
}

/* 移动导航按钮（桌面隐藏） */
.mobile-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.mobile-nav-toggle:hover .toggle-line {
  background: var(--color-accent);
}

.mobile-nav-toggle:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 2px;
}

.toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  margin: 4px auto;
  background: #fff;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease, background-color 0.2s ease;
}

.mobile-nav-toggle[aria-expanded="true"] .toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-nav-toggle[aria-expanded="true"] .toggle-line:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle[aria-expanded="true"] .toggle-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 滚动进度条 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--color-accent);
  z-index: var(--z-progress);
  pointer-events: none;
  transition: width 80ms linear;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  margin-left: var(--rail-w);
  padding-top: 56px;
  background: var(--color-deep);
  color: var(--color-rail-text);
}

.footer-top {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 32px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-brand-mark {
  display: inline-block;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #fff;
  transition: color 0.18s ease;
}

.footer-brand-mark:hover {
  color: var(--color-accent);
}

.footer-slogan {
  margin-top: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
}

.footer-trust {
  margin-top: 12px;
  max-width: 340px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.footer-nav {
  display: flex;
  flex-direction: column;
}

.footer-title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8A9BB8;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-list a,
.footer-link {
  display: inline-block;
  font-size: 14px;
  color: #C5D0E8;
  transition: color 0.18s ease;
}

.footer-nav-list a:hover,
.footer-link:hover {
  color: var(--color-accent);
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.footer-bottom {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 20px 32px 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  border-top: 1px solid rgba(44, 62, 107, 0.7);
}

.footer-copy,
.footer-copy-extra {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 959px) {
  html {
    scroll-behavior: auto;
  }

  /* 页头变成顶部栏 */
  .site-header {
    position: sticky;
    top: 0;
    width: 100%;
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px 0 16px;
    background: var(--color-deep);
    border-bottom: 1px solid var(--color-border);
    pointer-events: auto;
  }

  .brand-rail {
    padding: 0;
    border-right: none;
    background: transparent;
  }

  .brand-rail::before,
  .brand-rail::after {
    display: none;
  }

  .brand-mark {
    padding: 0;
  }

  .brand-name {
    font-size: 20px;
  }

  .brand-en {
    display: none;
  }

  /* 移动端导航默认收起，data-open 时下拉 */
  .rail-nav {
    display: none;
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    margin-top: 0;
    padding: 16px 20px 20px;
    background: var(--color-deep);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
    z-index: var(--z-nav);
  }

  .rail-nav[data-open] {
    display: flex;
    flex-direction: column;
  }

  .nav-list {
    gap: 2px;
  }

  .nav-link {
    padding: 13px 10px;
  }

  .nav-link[aria-current="page"]::before {
    left: 0;
    top: 15%;
    bottom: 15%;
  }

  .rail-foot {
    margin-top: 20px;
  }

  .content-topbar {
    display: none;
  }

  .mobile-nav-toggle {
    display: flex;
  }

  /* 内容区取消左侧距 */
  .main-content {
    margin-left: 0;
    padding-top: 0;
    min-height: auto;
  }

  .page-body,
  .page-body-narrow {
    padding: 24px 20px 64px;
  }

  /* 页脚 */
  .site-footer {
    margin-left: 0;
    padding-top: 40px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    padding: 0 20px 24px;
  }

  .footer-bottom {
    padding: 16px 20px 24px;
  }
}

@media (max-width: 719px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .col-3,
  .col-4,
  .col-5,
  .col-6,
  .col-7,
  .col-8 {
    grid-column: span 12;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .scroll-progress {
    transition: none;
  }
}