/* ==========================================================
   中欧体育KOK — 共享 Site Kit
   路径：/assets/site.css
========================================================== */

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

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

body {
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul,
ol {
  list-style: none;
}

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

/* ---------- CSS 变量 ---------- */
:root {
  --color-primary: #0A1F44;
  --color-accent: #FF6B35;
  --color-bg: #F5EFE6;
  --color-ink: #1A1A2E;
  --color-secondary-bg: #E8EDF2;
  --color-border: #D1D5DB;
  --color-data-blue: #3B82F6;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-white: #FFFFFF;
  --color-primary-soft: rgba(10, 31, 68, 0.08);

  --font-heading: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-number: "JetBrains Mono", "SF Mono", "Roboto Mono", "Cascadia Code", "Consolas", monospace;

  --content-max: 1200px;
  --header-height: 76px;
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 18px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;
  --transition-fast: 200ms ease;
  --transition-base: 300ms ease;
  --shadow-sm: 0 2px 8px rgba(10, 31, 68, 0.08);
  --shadow-md: 0 8px 24px rgba(10, 31, 68, 0.12);
  --shadow-lg: 0 16px 48px rgba(10, 31, 68, 0.18);
}

/* ---------- 通用排版 ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.25;
  color: var(--color-ink);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1em;
}

.small,
.caption {
  font-size: 0.875rem;
  color: #4B5563;
}

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background: #E55520;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
}

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

.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 28px;
  font-size: 1.0625rem;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  margin-bottom: var(--space-xl);
  font-size: 0.875rem;
  color: #6B7280;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.breadcrumb-item {
  position: relative;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: var(--space-sm);
  color: var(--color-border);
  font-family: var(--font-number);
}

.breadcrumb-item a {
  color: var(--color-data-blue);
  transition: color var(--transition-fast);
}

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

.breadcrumb-item[aria-current="page"] {
  color: var(--color-ink);
  font-weight: 700;
}

/* ---------- 章节标题 ---------- */
.section-title {
  position: relative;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 900;
  padding-left: 18px;
  margin-bottom: var(--space-xl);
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 6px;
  background: var(--color-accent);
  border-radius: 3px;
}

/* ---------- 网格与卡片 ---------- */
.grid {
  display: grid;
  gap: var(--space-lg);
}

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

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

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* ---------- 媒体框（页面图片容器） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(10, 31, 68, 0.92) 0%, rgba(10, 31, 68, 0.72) 60%, rgba(232, 237, 242, 0.9) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 24px 24px;
  z-index: 1;
  pointer-events: none;
}

.media-frame::after {
  content: "";
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 40px;
  height: 40px;
  background: var(--color-accent);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  opacity: 0.85;
  z-index: 2;
}

.media-frame img {
  position: relative;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame .frame-label {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 3;
  font-family: var(--font-number);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-white);
  background: rgba(10, 31, 68, 0.72);
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: -48px;
  left: 0;
  z-index: 1000;
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 700;
  font-size: 0.875rem;
  padding: 12px 20px;
  border-radius: 0 0 var(--radius-sm) 0;
  transition: top var(--transition-fast);
}

.skip-link:focus-visible {
  top: 0;
}

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 24px rgba(10, 31, 68, 0.2);
}

/* 滚动进度条 */
.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--color-accent);
  z-index: 600;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* 状态条 */
.header-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 28px;
  padding: 0 var(--space-lg);
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-number);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(232, 237, 242, 0.7);
  max-width: 1400px;
  margin: 0 auto;
}

.header-status-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.header-status-version {
  color: rgba(232, 237, 242, 0.45);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.7);
  animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
  0%,
  100% {
    opacity: 1;
    box-shadow: 0 0 6px rgba(16, 185, 129, 0.5);
  }
  50% {
    opacity: 0.7;
    box-shadow: 0 0 14px rgba(16, 185, 129, 0.85);
  }
}

/* 头部主体 */
.header-main {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  max-width: 1400px;
  margin: 0 auto;
  padding: 12px var(--space-lg);
  position: relative;
}

.header-main::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent) 0%, transparent 100%);
}

/* 品牌 */
.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.5rem;
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 14px;
  height: 14px;
  background: var(--color-primary);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
}

.brand-mark-core {
  letter-spacing: -0.05em;
  line-height: 1;
  transform: translateY(1px);
}

.brand-copy {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.125rem;
  letter-spacing: 0.04em;
  line-height: 1.35;
  color: var(--color-white);
}

.brand-sub {
  font-family: var(--font-number);
  font-size: 0.6875rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(232, 237, 242, 0.55);
}

/* 主导航 */
.site-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(232, 237, 242, 0.75);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-white);
}

.nav-link[aria-current="page"] {
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
}

.nav-index {
  font-family: var(--font-number);
  font-size: 0.6875rem;
  opacity: 0.65;
  letter-spacing: 0.05em;
}

.nav-link[aria-current="page"] .nav-index {
  opacity: 0.95;
}

/* 头部 CTA */
.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-accent);
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.header-cta:hover {
  background: #ff8453;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.4);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: background var(--transition-fast);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.12);
}

.nav-toggle-aria {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 18px;
  height: 18px;
}

.nav-toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--color-primary);
  color: rgba(232, 237, 242, 0.82);
  position: relative;
  margin-top: var(--space-2xl);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--color-accent) 0%, transparent 100%);
}

.site-footer a {
  color: rgba(232, 237, 242, 0.82);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

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

/* 页脚主体 */
.footer-main {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: var(--space-xl);
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-xl);
}

/* 品牌列 */
.footer-brand {
  margin-bottom: var(--space-md);
}

.footer-brand-name {
  display: block;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--color-white);
  letter-spacing: 0.03em;
  margin-bottom: 4px;
}

.footer-brand-slogan {
  display: inline-block;
  font-size: 0.8125rem;
  letter-spacing: 0.22em;
  color: rgba(232, 237, 242, 0.5);
  text-transform: uppercase;
}

.footer-trust {
  margin-top: var(--space-md);
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(232, 237, 242, 0.65);
  max-width: 32ch;
}

/* 链接列 */
.footer-col-title {
  font-family: var(--font-number);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(232, 237, 242, 0.4);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-link-list li,
.footer-contact-list li {
  margin-bottom: 10px;
}

.footer-link-list a {
  font-size: 0.9375rem;
}

.footer-link-list a:hover {
  padding-left: 4px;
}

/* 联系列表 */
.footer-contact-list {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(232, 237, 242, 0.72);
}

.footer-contact-list li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.footer-contact-list li::before {
  content: "›";
  color: var(--color-accent);
  font-family: var(--font-number);
  flex-shrink: 0;
  line-height: 1.6;
}

/* 页脚底部 */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.18);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px var(--space-lg);
  font-family: var(--font-number);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(232, 237, 242, 0.45);
}

/* ---------- 响应式：平板 ---------- */
@media (max-width: 1024px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
}

/* ---------- 响应式：移动端 ---------- */
@media (max-width: 768px) {
  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .header-status {
    padding: 0 var(--space-md);
  }

  .header-main {
    padding: 10px var(--space-md);
    gap: var(--space-sm);
  }

  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 84vw);
    max-width: 100vw;
    background: var(--color-primary);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: 580;
    padding: 72px var(--space-lg) var(--space-lg);
    box-shadow: -24px 0 48px rgba(0, 0, 0, 0.3);
    overflow-y: auto;
    margin-left: 0;
  }

  .site-nav[data-open] {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    padding: 14px 16px;
    font-size: 0.9375rem;
    border-radius: var(--radius-sm);
    border-left: 3px solid transparent;
  }

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

  .nav-index {
    min-width: 24px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    padding-top: var(--space-xl);
    gap: var(--space-lg);
  }

  .footer-brand-col {
    padding-bottom: var(--space-sm);
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
    padding: 14px var(--space-md);
  }
}

/* 遮罩层 */
body.nav-open {
  overflow: hidden;
}

body.nav-open::after {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(10, 31, 68, 0.55);
  z-index: 550;
  backdrop-filter: blur(2px);
}

/* ---------- 焦点可见性 ---------- */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 降低动画 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .status-dot {
    animation: none;
  }

  .scroll-progress {
    transition: none;
  }
}

/* ---------- 数据文本辅助 ---------- */
.data-stat {
  font-family: var(--font-number);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.data-label {
  font-family: var(--font-number);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(10, 31, 68, 0.55);
}

/* ---------- 虚线分隔 ---------- */
.dashed-divider {
  height: 0;
  border: 0;
  border-top: 1px dashed var(--color-border);
  margin: var(--space-xl) 0;
}

/* ---------- 分割区 ---------- */
.panel {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.panel-secondary {
  background: var(--color-secondary-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

/* ---------- 工具性 ---------- */
.text-accent {
  color: var(--color-accent);
}

.text-muted {
  color: #6B7280;
}

.mt-md {
  margin-top: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mb-md {
  margin-bottom: var(--space-md);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

/* ---------- 表格基础（页面可能使用） ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th {
  font-family: var(--font-number);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(10, 31, 68, 0.6);
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--color-border);
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  font-variant-numeric: tabular-nums;
}

.data-table tr:hover td {
  background: rgba(59, 130, 246, 0.04);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-number);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-ink);
  font-weight: 500;
}

.tag-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
}

.tag-blue {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.25);
  color: var(--color-data-blue);
}

.tag-green {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.25);
  color: #0D9668;
}

.tag-yellow {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  color: #B45309;
}