/* ========================================================
   多宝体育 DATA ARENA — 全站共享样式 /assets/site.css
   ======================================================== */

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

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

body {
  background:
    radial-gradient(ellipse at 82% 0%, rgba(0, 200, 255, 0.045), transparent 52%),
    radial-gradient(ellipse at 18% 100%, rgba(57, 255, 136, 0.025), transparent 44%),
    var(--bg-void);
  color: var(--white);
  font-family: var(--font-h);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---------- CSS 变量 ---------- */
:root {
  --bg-void: #0a0e17;
  --bg-card: #111827;
  --bg-elev: #16202f;
  --blue: #00c8ff;
  --green: #39ff88;
  --white: #e5edf5;
  --gray: #8a9db5;
  --yellow: #ffd166;
  --red: #ff3b5c;
  --grid: rgba(0, 200, 255, 0.2);
  --header-h: 56px;
  --rail-w: 88px;
  --radius: 6px;
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --font-h: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-num: 'Roboto Mono', 'SF Mono', 'Menlo', monospace;
  --container-w: 1200px;
}

/* ---------- 中文排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-h);
  font-weight: 800;
  color: var(--white);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(1.875rem, 4.5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.25rem); }
h3 { font-size: 1.125rem; }
h4 { font-size: 1rem; }

p { color: var(--gray); }

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: none;
}

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

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

/* ---------- Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--blue);
  color: var(--bg-void);
  font-weight: 700;
  border-radius: 4px;
  transition: top 0.2s var(--ease);
  box-shadow: 0 4px 16px rgba(0, 200, 255, 0.35);
  font-size: 0.875rem;
}

.skip-link:focus {
  top: 12px;
}

/* ---------- 阅读进度条 ---------- */
.progress-track {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 600;
  pointer-events: none;
  background: transparent;
}

.progress-fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--blue) 0%, var(--green) 100%);
  box-shadow: 0 0 14px rgba(57, 255, 136, 0.4);
  transition: width 80ms linear;
}

/* ---------- 顶栏 ---------- */
.site-header__bar {
  position: sticky;
  top: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  height: var(--header-h);
  padding: 0 14px 0 20px;
  background: var(--bg-void);
  border-bottom: 1px solid var(--grid);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.site-brand__mark {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid var(--blue);
  transform: rotate(45deg);
  border-radius: 1px;
  box-shadow: 0 0 8px rgba(0, 200, 255, 0.4);
  flex-shrink: 0;
}

.site-brand__text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-brand__cn {
  font-size: 1rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 0.08em;
}

.site-brand__tag {
  font-size: 0.5625rem;
  font-family: var(--font-num);
  letter-spacing: 0.24em;
  color: var(--blue);
  text-transform: uppercase;
}

.header-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--gray);
  text-transform: uppercase;
  white-space: nowrap;
}

.header-status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px rgba(57, 255, 136, 0.8);
  animation: pulse-dot 2.2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.82); }
}

/* ---------- 汉堡按钮 ---------- */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 38px;
  height: 38px;
  background: transparent;
  border: 1px solid var(--grid);
  border-radius: 4px;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
  flex-shrink: 0;
}

.nav-toggle:hover {
  border-color: var(--blue);
  background: rgba(0, 200, 255, 0.06);
}

.nav-toggle__bar {
  width: 18px;
  height: 2px;
  background: var(--white);
  border-radius: 1px;
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

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

/* ---------- 侧边导航 / 移动抽屉 ---------- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 500;
  width: 320px;
  max-width: 85vw;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border-right: 1px solid var(--grid);
  transform: translateX(-102%);
  transition: transform 0.28s var(--ease);
}

.site-nav[data-open] {
  transform: translateX(0);
  box-shadow: 16px 0 48px rgba(0, 0, 0, 0.55);
}

.site-nav__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 14px 12px 20px;
  border-bottom: 1px solid var(--grid);
  flex-shrink: 0;
}

.site-nav__label {
  font-family: var(--font-num);
  font-size: 0.625rem;
  letter-spacing: 0.3em;
  color: var(--blue);
  text-transform: uppercase;
}

.nav-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: transparent;
  border: 1px solid var(--grid);
  border-radius: 4px;
  color: var(--white);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.nav-close:hover {
  border-color: var(--blue);
  background: rgba(0, 200, 255, 0.06);
}

.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 8px 0;
  flex: 1;
  overflow-y: auto;
}

.site-nav__item {
  margin: 2px 0;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray);
  border-left: 3px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.site-nav__link:hover {
  color: var(--white);
  background: rgba(0, 200, 255, 0.05);
  border-left-color: var(--blue);
}

.site-nav__link[aria-current="page"] {
  color: var(--white);
  border-left-color: var(--blue);
  background: rgba(0, 200, 255, 0.08);
}

.site-nav__idx {
  font-family: var(--font-num);
  font-size: 0.6875rem;
  color: var(--blue);
  letter-spacing: 0.1em;
  min-width: 34px;
}

.site-nav__name {
  flex: 1;
}

.site-nav__bottom {
  padding: 14px 20px 20px;
  border-top: 1px solid var(--grid);
  flex-shrink: 0;
}

.site-nav__meta {
  display: block;
  font-family: var(--font-num);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  color: var(--gray);
  line-height: 1.6;
}

/* ---------- 桌面端侧轨 ---------- */
@media (min-width: 1024px) {
  .site-nav {
    width: var(--rail-w);
    max-width: none;
    transform: none;
    top: var(--header-h);
    bottom: 0;
    background: transparent;
    border-right: 1px solid var(--grid);
    box-shadow: none;
    transition: none;
    z-index: 200;
  }

  .site-nav[data-open] {
    box-shadow: none;
  }

  .site-nav__top,
  .site-nav__bottom {
    display: none;
  }

  .site-nav__list {
    padding: 24px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .site-nav__item {
    margin: 8px 0;
    width: 100%;
  }

  .site-nav__link {
    flex-direction: column;
    gap: 4px;
    width: 100%;
    padding: 14px 0;
    border-left: none;
    border-bottom: 2px solid transparent;
    text-align: center;
    font-size: 0.8125rem;
  }

  .site-nav__link:hover {
    border-left: none;
    border-bottom-color: var(--blue);
    background: transparent;
  }

  .site-nav__link[aria-current="page"] {
    border-left: none;
    border-bottom-color: var(--blue);
    background: rgba(0, 200, 255, 0.08);
  }

  .site-nav__idx {
    min-width: 0;
    font-size: 0.625rem;
  }

  #main-content,
  .site-footer {
    margin-left: var(--rail-w);
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  background:
    linear-gradient(rgba(0, 200, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 200, 255, 0.025) 1px, transparent 1px),
    var(--bg-card);
  background-size: 44px 44px;
  border-top: 1px solid var(--grid);
  margin-top: 80px;
}

.site-footer::before {
  content: "DATA ARENA / END";
  position: absolute;
  top: 12px;
  right: 20px;
  font-family: var(--font-num);
  font-size: 0.625rem;
  letter-spacing: 0.3em;
  color: rgba(138, 157, 181, 0.5);
  z-index: 1;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 52px 20px 36px;
  position: relative;
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.site-footer__logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 0.06em;
  transition: color 0.2s var(--ease);
}

.site-footer__logo:hover {
  color: var(--blue);
}

.site-footer__tag {
  font-family: var(--font-num);
  font-size: 0.6875rem;
  letter-spacing: 0.3em;
  color: var(--blue);
  text-transform: uppercase;
  margin-top: 4px;
}

.site-footer__desc {
  margin-top: 12px;
  font-size: 0.875rem;
  color: var(--gray);
}

.site-footer__trust {
  margin-top: 18px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--gray);
  max-width: 48ch;
  padding-left: 12px;
  border-left: 2px solid var(--green);
  opacity: 0.85;
}

.site-footer__title {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--grid);
}

.site-footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__links li {
  margin: 8px 0;
}

.site-footer__links a {
  color: var(--white);
  font-size: 0.875rem;
  transition: color 0.2s var(--ease);
}

.site-footer__links a:hover {
  color: var(--blue);
}

.site-footer__address {
  font-style: normal;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--white);
  line-height: 1.6;
}

.site-footer__bottom {
  border-top: 1px solid var(--grid);
  padding: 16px 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: var(--container-w);
  margin: 0 auto;
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--gray);
}

@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
  }
}

@media (min-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 2.2fr 1fr 1fr 1.4fr;
  }
}

/* ---------- 内容容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.content-block {
  max-width: 72ch;
}

.content-block p {
  margin: 0 0 1em;
  line-height: 1.7;
}

.content-block h2,
.content-block h3,
.content-block h4 {
  margin: 1.8em 0 0.6em;
}

/* ---------- Bento 网格 ---------- */
.bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 768px) {
  .bento-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
  }
}

@media (min-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 20px;
  }
}

.bento-card {
  position: relative;
  background: linear-gradient(145deg, #151d2e 0%, var(--bg-card) 100%);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  padding: 20px;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.bento-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 200, 255, 0.5);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35), 0 0 20px rgba(0, 200, 255, 0.05);
}

@media (min-width: 768px) {
  .bento-card--span-3 { grid-column: span 3; }
  .bento-card--span-4 { grid-column: span 4; }
  .bento-card--span-6 { grid-column: span 6; }
  .bento-card--span-8 { grid-column: span 8; }
  .bento-card--span-12 { grid-column: span 12; }
  .bento-card--row-2 { grid-row: span 2; }
  .bento-card--row-3 { grid-row: span 3; }
}

/* ---------- 展签标签 ---------- */
.card__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-num);
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.card__tag::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(0, 200, 255, 0.8);
}

/* ---------- 数据数字与标签 ---------- */
.data-number {
  font-family: var(--font-num);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--green);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.data-number--blue {
  color: var(--blue);
}

.data-number--white {
  color: var(--white);
}

.data-label {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--gray);
  text-transform: uppercase;
}

/* ---------- 章节标题 ---------- */
.section-head {
  position: relative;
  margin: 48px 0 24px;
  display: flex;
  align-items: flex-end;
  gap: 12px;
}

.section-head__title {
  font-size: clamp(1.375rem, 2.5vw, 1.875rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--blue);
}

.section-head__note {
  font-family: var(--font-num);
  font-size: 0.625rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 2px;
}

@media (min-width: 768px) {
  .section-head__note {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    position: absolute;
    right: 0;
    top: -8px;
    font-size: 0.625rem;
  }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.4;
  border-radius: 4px;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  background: transparent;
  color: var(--white);
  font-family: var(--font-h);
}

.btn--primary {
  background: var(--blue);
  color: var(--bg-void);
  border-color: var(--blue);
  box-shadow: 0 0 12px rgba(0, 200, 255, 0.2);
}

.btn--primary:hover {
  background: #33d5ff;
  border-color: #33d5ff;
  box-shadow: 0 0 24px rgba(0, 200, 255, 0.35);
  color: var(--bg-void);
}

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

.btn--ghost:hover {
  border-color: var(--blue);
  color: var(--blue);
  box-shadow: 0 0 12px rgba(0, 200, 255, 0.12);
}

/* ---------- 面包屑 ---------- */
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--gray);
}

.breadcrumb__item:not(:last-child)::after {
  content: "/";
  color: var(--blue);
  font-family: var(--font-num);
  opacity: 0.7;
}

.breadcrumb__link {
  color: var(--gray);
  transition: color 0.2s var(--ease);
}

.breadcrumb__link:hover {
  color: var(--blue);
}

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

/* ---------- 简单分栏 ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }

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

/* ---------- 图片容器 ---------- */
.image-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, #131a2a, #0c1120);
  border-radius: var(--radius);
  border: 1px solid var(--grid);
  display: block;
}

.image-frame > img,
.image-frame > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s var(--ease);
}

.image-frame:hover > img {
  transform: scale(1.03);
}

.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(255, 255, 255, 0.02) 0,
    rgba(255, 255, 255, 0.02) 1px,
    transparent 1px,
    transparent 3px
  );
  pointer-events: none;
  z-index: 1;
}

.image-frame--video {
  aspect-ratio: 16 / 9;
}

.image-frame--portrait {
  aspect-ratio: 3 / 4;
}

.image-frame--square {
  aspect-ratio: 1 / 1;
}

.image-frame--wide {
  aspect-ratio: 21 / 9;
}

.image-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  padding: 18px 14px 10px;
  font-family: var(--font-num);
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
  background: linear-gradient(transparent, rgba(10, 14, 23, 0.88));
  z-index: 2;
}

/* ---------- 响应式辅助 ---------- */
@media (max-width: 640px) {
  .header-status__text {
    display: none;
  }

  .site-header__bar {
    padding-left: 14px;
    padding-right: 12px;
  }
}

@media (min-width: 1400px) {
  :root {
    --container-w: 1280px;
  }
}

/* ---------- 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;
  }

  .header-status__dot {
    animation: none;
  }

  .image-frame:hover > img {
    transform: none;
  }
}