:root {
  --bg-deep: #0a0e27;
  --bg-card: #10162f;
  --accent: #00d26a;
  --accent-bright: #00e675;
  --gold: #ffb800;
  --electric: #00d0ff;
  --text: #ffffff;
  --text-muted: #b8c0d0;
  --border-trans: rgba(255, 255, 255, 0.12);
  --radius-card: 24px;
  --radius-pill: 999px;
  --font-sans: system-ui, -apple-system, "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --container: 1200px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  background-color: var(--bg-deep);
}

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    radial-gradient(1200px 700px at 85% -10%, rgba(0, 210, 106, 0.07), transparent 60%),
    radial-gradient(900px 600px at -10% 100%, rgba(0, 208, 255, 0.05), transparent 60%);
  background-size: 28px 28px, auto, auto;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.25;
  text-wrap: balance;
  overflow-wrap: break-word;
}

p {
  text-wrap: pretty;
  overflow-wrap: break-word;
}

ul, ol {
  padding: 0;
  list-style: none;
}

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

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

[id] {
  scroll-margin-top: 100px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ===== 容器与网格 ===== */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.container--narrow {
  max-width: 840px;
}

.container--wide {
  max-width: 1440px;
}

.section {
  padding-block: 64px;
}

.section--tight {
  padding-block: 32px;
}

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

.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));
}

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--border-trans), transparent);
  margin: 48px 0;
}

.copy-block {
  max-width: 64ch;
}

.copy-block p + p {
  margin-top: 1em;
}

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

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

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

.btn-primary:hover {
  background: var(--accent-bright);
  color: var(--bg-deep);
}

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

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

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 24px 0 0;
  font-size: 13px;
  color: var(--text-muted);
}

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

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

.breadcrumb__sep {
  opacity: 0.5;
}

/* ===== 章节标题 ===== */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-trans);
}

.section-head__num {
  min-width: 44px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.section-head__title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.section-head__sub {
  margin-left: auto;
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 宣言与目录 ===== */
.manifesto {
  max-width: 840px;
  margin: 0;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.45;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.manifesto__accent {
  color: var(--accent);
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 40px 0;
}

.toc__link {
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--border-trans);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.toc__link:hover {
  color: var(--text);
  border-color: var(--accent);
}

.toc__link[data-active="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-deep);
}

/* ===== 数据卡片与统计 ===== */
.data-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-trans);
  border-radius: var(--radius-card);
  padding: 24px;
}

.data-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 4px;
  background: var(--accent);
  border-radius: 0 4px 4px 0;
}

.data-card::after {
  content: "";
  position: absolute;
  right: -32px;
  bottom: -32px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 210, 106, 0.08), transparent 70%);
  pointer-events: none;
}

.data-card__value {
  display: block;
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.data-card__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.stat-num {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.num-tabular {
  font-variant-numeric: tabular-nums;
}

/* ===== 标签与比分 ===== */
.tag {
  display: inline-block;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  background: var(--bg-card);
  border: 1px solid var(--border-trans);
  color: var(--text-muted);
}

.tag--green {
  border-color: transparent;
  background: rgba(0, 210, 106, 0.12);
  color: var(--accent);
}

.tag--gold {
  border-color: transparent;
  background: rgba(255, 184, 0, 0.12);
  color: var(--gold);
}

.score-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid var(--border-trans);
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--bg-card), rgba(16, 22, 47, 0.4));
  font-size: 13px;
  color: var(--text-muted);
}

.score-strip__live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--accent);
  color: var(--bg-deep);
  border-radius: var(--radius-pill);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.06em;
}

.score-strip__live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--bg-deep);
}

.scoreboard {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-trans);
  border-radius: var(--radius-card);
  padding: 24px;
}

.scoreboard__team {
  font-weight: 800;
  font-size: 18px;
  text-align: center;
}

.scoreboard__score {
  font-size: 32px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.scoreboard__meta {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(0, 210, 106, 0.12);
  color: var(--accent);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.06em;
}

.live-indicator::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: blink 1.2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

/* ===== 图片容器 ===== */
.visual-stage {
  position: relative;
  overflow: hidden;
  min-height: 260px;
  display: flex;
  align-items: flex-end;
  border-radius: 28px;
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(0, 210, 106, 0.08) 55%, var(--bg-card) 100%);
  border: 1px solid var(--border-trans);
}

.visual-stage > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.visual-stage__cap {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 24px;
  font-size: 13px;
  color: var(--text-muted);
  background: linear-gradient(0deg, rgba(10, 14, 39, 0.72), transparent);
}

/* ===== 无障碍跳转 ===== */
.site-skip {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 300;
  padding: 12px 20px;
  background: var(--accent);
  color: var(--bg-deep);
  font-weight: 800;
  border-radius: var(--radius-pill);
  transition: top 0.2s ease;
}

.site-skip:focus {
  top: 16px;
}

/* ===== 滚动进度 ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 250;
  background: linear-gradient(90deg, var(--accent), var(--electric));
  transform: scaleX(0);
  transform-origin: left;
  pointer-events: none;
}

/* ===== 头部 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  justify-content: center;
  padding: 16px 20px;
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  width: min(1200px, 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 12px 8px 22px;
  background: rgba(16, 22, 47, 0.72);
  border: 1px solid var(--border-trans);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  pointer-events: auto;
}

.site-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  white-space: nowrap;
}

.site-brand__logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.site-brand__suffix {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.12em;
}

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

.site-nav__link {
  display: inline-block;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav__link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

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

.site-nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--border-trans);
  border-radius: 50%;
}

.site-nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 99px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.site-nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== 页脚 ===== */
.site-footer {
  margin-top: 80px;
  padding: 64px 24px 32px;
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-card) 100%);
  border-top: 1px solid var(--border-trans);
  color: var(--text-muted);
}

.site-footer__inner {
  max-width: 1200px;
  margin: 0 auto;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px 32px;
}

.site-footer__logo {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

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

.site-footer__about {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.7;
}

.site-footer__head {
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
}

.site-footer__list {
  display: grid;
  gap: 8px;
}

.site-footer__list a {
  color: var(--text-muted);
  font-size: 14px;
  transition: color 0.2s ease;
}

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

.site-footer__meta {
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-muted);
}

.site-footer__legal {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border-trans);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
  font-size: 13px;
}

.site-footer__trust {
  max-width: 640px;
  color: var(--text-muted);
  opacity: 0.8;
}

/* ===== 返回顶部 ===== */
.top-link {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 150;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border-trans);
  background: var(--bg-card);
  color: var(--accent);
  font-size: 20px;
  font-weight: 800;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease, background 0.2s ease;
}

.top-link:hover {
  background: var(--accent);
  color: var(--bg-deep);
}

.top-link.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ===== 渐显动效 ===== */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container {
    padding-inline: 20px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px 24px;
  }
}

@media (max-width: 760px) {
  .section {
    padding-block: 48px;
  }

  .site-header {
    padding: 10px 12px;
  }

  .site-header__inner {
    padding: 6px 6px 6px 18px;
  }

  .site-nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 16px;
    background: rgba(10, 14, 39, 0.97);
    border: 1px solid var(--border-trans);
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
  }

  .site-nav[data-open="true"] {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .site-nav__link {
    display: block;
    padding: 12px 16px;
    font-size: 16px;
    border-radius: 14px;
  }

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

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-head__sub {
    margin-left: 0;
    width: 100%;
  }
}

@media (max-width: 600px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .site-footer {
    padding: 44px 20px 24px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .site-footer__legal {
    flex-direction: column;
    text-align: center;
  }

  .top-link {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
    font-size: 18px;
  }
}

/* ===== 减少动态偏好 ===== */
@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;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .live-indicator::before {
    animation: none;
    opacity: 1;
  }
}