/* ==========================================================================
   云开体育 / 站点共享基础样式
   文件位置：/assets/site.css
   设计系统：数据指挥中心 · 技术蓝图网格
   ========================================================================== */

/* ---------- Reset ---------- */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

[hidden] {
  display: none !important;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg, #0B1D3A);
  background-image:
    radial-gradient(circle at 80% 10%, rgba(42, 92, 170, 0.28), transparent 42%),
    radial-gradient(circle at 8% 75%, rgba(57, 255, 20, 0.05), transparent 38%),
    linear-gradient(rgba(57, 255, 20, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.03) 1px, transparent 1px);
  background-size: auto, auto, 32px 32px, 32px 32px;
  color: var(--color-text, #E0E6ED);
  font-family: var(--font-body, "PingFang SC", "Microsoft YaHei", sans-serif);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

main {
  flex: 1;
}

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

input,
button,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
}

ul,
ol {
  padding-left: 1.4em;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.45em;
  color: var(--color-white, #FFFFFF);
  font-family: var(--font-head, "PingFang SC", "Microsoft YaHei", sans-serif);
  font-weight: 900;
  line-height: 1.25;
}

h1 {
  font-size: clamp(34px, 5vw, 48px);
}

h2 {
  font-size: clamp(26px, 3vw, 34px);
}

h3 {
  font-size: clamp(20px, 2vw, 24px);
}

h4 {
  font-size: 18px;
}

:focus-visible {
  outline: 2px solid var(--color-accent, #39FF14);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- CSS 变量 ---------- */

:root {
  --color-bg: #0B1D3A;
  --color-panel: #1E2A3A;
  --color-panel-2: #162337;
  --color-accent: #39FF14;
  --color-warning: #FF6A00;
  --color-text: #E0E6ED;
  --color-muted: #A0B0C0;
  --color-white: #FFFFFF;
  --gradient-haihe: linear-gradient(135deg, #0B1D3A, #2A5CAA);
  --font-head: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
  --container: 1280px;
  --header-z: 100;
  --overlay-z: 999;
}

/* ---------- 通用布局 ---------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.page {
  padding: 56px 0 72px;
}

.lead {
  max-width: 52em;
  margin-bottom: 24px;
  font-size: 18px;
  line-height: 1.7;
}

/* ---------- 网格 ---------- */

.grid {
  display: grid;
  gap: 24px;
}

.grid--2col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3col {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4col {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 1023px) {
  .grid--4col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .grid--2col,
  .grid--3col,
  .grid--4col {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- 章节标题 ---------- */

.sectionhead {
  margin-bottom: 32px;
}

.sectionhead__kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.sectionhead__kicker::before {
  content: "//";
  color: var(--color-warning);
}

.sectionhead__title {
  margin: 0;
  color: var(--color-white);
  font-family: var(--font-head);
  font-size: 32px;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.sectionhead__title::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 12px;
  background: var(--color-warning);
  transform: translateY(-4px) rotate(45deg);
}

.sectionhead__aside {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: 4px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background: var(--color-white);
  color: var(--color-bg);
}

.btn:active {
  transform: translateY(1px);
}

.btn--outline {
  background: transparent;
  border: 1px solid rgba(224, 230, 237, 0.3);
  color: var(--color-text);
}

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

.btn--warning {
  background: var(--color-warning);
  color: var(--color-bg);
}

.btn--warning:hover {
  background: var(--color-warning);
  opacity: 0.85;
}

/* ---------- 面包屑 ---------- */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--color-muted);
  opacity: 0.45;
}

.breadcrumbs a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.breadcrumbs [aria-current="page"] {
  color: var(--color-text);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--header-z);
  background: rgba(11, 29, 58, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(224, 230, 237, 0.12);
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

.site-header__inner {
  position: relative;
}

.skip-link {
  position: fixed;
  top: -72px;
  left: 16px;
  z-index: 200;
  padding: 12px 20px;
  border-radius: 0 0 4px 4px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 700;
  text-decoration: none;
  transition: top 0.3s ease;
}

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

/* ---------- 刊头 ---------- */

.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 18px 0 10px;
}

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

.masthead__edition {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  white-space: nowrap;
}

.masthead__status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.masthead__led {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.8);
  animation: led-blink 2s ease-in-out infinite;
}

.masthead__controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.masthead__coords {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  white-space: nowrap;
}

/* ---------- 品牌 ---------- */

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-white);
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-decoration: none;
  line-height: 1;
}

.brand:hover {
  color: var(--color-white);
}

.brand__sigil {
  position: relative;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
}

.brand__ring {
  position: absolute;
  inset: 2px;
  border: 1px solid rgba(57, 255, 20, 0.45);
  border-radius: 50%;
}

.brand__ring::before {
  content: "";
  position: absolute;
  inset: -1px;
  border: 1px dashed rgba(57, 255, 20, 0.3);
  border-radius: 50%;
  animation: spin 16s linear infinite;
}

.brand__ring::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(57, 255, 20, 0.2);
  border-radius: 50%;
}

.brand__dot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent);
  transform: translate(-50%, -50%);
}

.brand__name {
  line-height: 1;
}

/* ---------- 主导航 ---------- */

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(224, 230, 237, 0.2);
  border-radius: 4px;
  background: transparent;
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.nav-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.nav-toggle__icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
  height: 14px;
}

.nav-toggle__icon span {
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease, background 0.2s ease;
}

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

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

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

.nav-toggle__label {
  font-size: 14px;
}

.site-nav {
  border-top: 1px solid rgba(224, 230, 237, 0.08);
  margin-top: 6px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.site-nav__list::-webkit-scrollbar {
  display: none;
}

.site-nav__item {
  position: relative;
  flex: 0 0 auto;
}

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 8px;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.site-nav__link:hover {
  color: var(--color-white);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
}

.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  transition: color 0.2s ease;
}

.site-nav__link[aria-current="page"] .site-nav__idx {
  color: var(--color-accent);
}

.site-nav__text {
  white-space: nowrap;
}

/* ---------- Footer ---------- */

.site-footer {
  position: relative;
  margin-top: 80px;
  background: var(--color-bg);
  border-top: 1px solid rgba(224, 230, 237, 0.1);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  width: 120px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-warning));
}

.site-footer__wrap {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.4fr;
  gap: 40px;
  padding-top: 48px;
  padding-bottom: 32px;
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.brand--footer {
  font-size: 24px;
}

.brand--footer .brand__sigil {
  flex-basis: 28px;
  width: 28px;
  height: 28px;
}

.site-footer__claim {
  max-width: 32em;
  font-size: 14px;
  color: var(--color-muted);
}

.site-footer__nav {
  display: flex;
  flex-direction: column;
}

.site-footer__heading {
  margin-bottom: 12px;
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.site-footer__navlist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.site-footer__navlist a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  color: var(--color-muted);
}

.site-footer__contact a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.site-footer__address {
  font-style: normal;
}

.site-footer__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 24px;
  padding-top: 14px;
  padding-bottom: 14px;
  border-top: 1px solid rgba(224, 230, 237, 0.08);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.site-footer__bar p {
  margin: 0;
}

.site-footer__copyright {
  color: var(--color-text);
}

.site-footer__icp {
  letter-spacing: 0.04em;
}

/* ---------- 面板 / 标签 / 媒体占位 ---------- */

.panel {
  position: relative;
  padding: 24px;
  border: 1px solid rgba(224, 230, 237, 0.1);
  border-radius: 6px;
  background: var(--color-panel);
}

.panel--tilt {
  transform: rotate(-1.2deg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.panel--tilt:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
}

.panel__label {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 3px 10px;
  border: 1px solid rgba(224, 230, 237, 0.08);
  border-radius: 999px;
  background: rgba(11, 29, 58, 0.6);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid rgba(224, 230, 237, 0.15);
  border-radius: 999px;
  background: rgba(11, 29, 58, 0.6);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
}

.tag--live::before,
.tag--hot::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
}

.tag--live::before {
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
  animation: led-blink 2s ease-in-out infinite;
}

.tag--hot::before {
  background: var(--color-warning);
  box-shadow: 0 0 8px var(--color-warning);
}

.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(224, 230, 237, 0.12);
  border-radius: 4px;
  background: var(--color-panel);
}

.media-frame--wide {
  aspect-ratio: 16 / 9;
}

.media-frame--card {
  aspect-ratio: 4 / 3;
}

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

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

.media-frame::before {
  content: "";
  position: absolute;
  inset: 10px;
  z-index: 1;
  pointer-events: none;
  border: 1px dashed rgba(57, 255, 20, 0.22);
}

.media-frame::after {
  content: "VIS // 数据可视化";
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--color-muted);
}

/* ---------- 正文排版 ---------- */

.prose {
  max-width: 72ch;
}

.prose p {
  margin-bottom: 1em;
}

.prose a {
  color: var(--color-accent);
  text-underline-offset: 2px;
}

.prose ul,
.prose ol {
  margin-bottom: 1em;
}

.prose li {
  margin-bottom: 0.4em;
}

.prose h2,
.prose h3 {
  margin-top: 1.6em;
}

.prose blockquote {
  margin: 1.5em 0;
  padding: 8px 20px;
  border-left: 3px solid var(--color-accent);
  background: rgba(57, 255, 20, 0.05);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-accent);
}

/* ---------- 标签页 ---------- */

.tabs {
  margin-bottom: 28px;
}

.tabs__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
  border-bottom: 1px solid rgba(224, 230, 237, 0.15);
}

.tabs__btn {
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: 8px 8px 0 0;
  background: none;
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: 15px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.tabs__btn:hover {
  color: var(--color-white);
}

.tabs__btn[aria-selected="true"] {
  background: rgba(57, 255, 20, 0.06);
  border-color: rgba(57, 255, 20, 0.25);
  color: var(--color-accent);
}

.tabs__panel {
  padding: 4px 0 12px;
}

.tabs__panel[hidden] {
  display: none;
}

/* ---------- 滚动进度与返回顶部 ---------- */

[data-scroll-progress] {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--overlay-z);
  height: 3px;
  pointer-events: none;
  background: linear-gradient(90deg, var(--color-accent), var(--color-warning));
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

.backtotop {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(57, 255, 20, 0.4);
  border-radius: 50%;
  background: rgba(11, 29, 58, 0.92);
  color: var(--color-accent);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.backtotop:hover,
.backtotop:focus-visible {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}

.backtotop[hidden] {
  display: none;
}

/* ---------- 动画 ---------- */

@keyframes led-blink {
  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.35;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- 响应式 ---------- */

@media (max-width: 1023px) {
  .site-footer__wrap {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  body {
    font-size: 15px;
  }

  .page {
    padding: 32px 0 56px;
  }

  .masthead {
    grid-template-columns: 1fr auto 1fr;
    padding: 12px 0 8px;
  }

  .masthead__meta {
    display: none;
  }

  .masthead__coords {
    display: none;
  }

  .masthead__controls {
    gap: 0;
  }

  .brand {
    font-size: 24px;
    gap: 10px;
  }

  .brand__sigil {
    flex-basis: 28px;
    width: 28px;
    height: 28px;
  }

  html.js .nav-toggle {
    display: inline-flex;
  }

  html.js .site-nav {
    display: none;
  }

  html.js .site-nav[data-open] {
    display: block;
  }

  .site-nav {
    margin-top: 0;
    border-top: none;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0 16px;
  }

  .site-nav__link {
    justify-content: flex-start;
    padding: 13px 8px;
    border-bottom: 1px solid rgba(224, 230, 237, 0.06);
  }

  .site-nav__item:last-child .site-nav__link {
    border-bottom: none;
  }

  .site-nav__link::after {
    left: 8px;
    right: auto;
    width: 28px;
  }

  .site-footer {
    margin-top: 56px;
  }

  .site-footer__wrap {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 40px;
  }

  .site-footer__bar {
    justify-content: flex-start;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .sectionhead__title {
    font-size: 26px;
  }

  .btn {
    width: 100%;
  }
}

/* ---------- 减少动态偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
}