:root {
  --e-purple: #7C3AED;
  --e-green: #22FF88;
  --night: #0A0E1A;
  --metal: #A0AEC0;
  --teal: #0F3A3B;
  --wine: #5C1A3C;
  --indigo: #4C1D95;
  --white: #F2F4F8;
  --text-light: #E2E8F0;
  --text-dark: #1A202C;
  --grad-primary: linear-gradient(135deg, #7C3AED 0%, #4C1D95 100%);
  --shadow-xl: 0 16px 40px rgba(0,0,0,0.55);
  --transition-fast: 180ms cubic-bezier(0.2, 0.9, 0.3, 1);
  --transition-smooth: 320ms cubic-bezier(0.2, 0.9, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--night);
  color: var(--text-light);
  font-family: "Noto Sans SC", "Source Han Sans SC", sans-serif;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

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

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-weight: 900;
  color: var(--white);
  line-height: 1.15;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10000;
  padding: 0.6rem 1rem;
  background: var(--e-green);
  color: var(--night);
  font-weight: 700;
  transform: translateY(-300%);
  transition: transform var(--transition-fast);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--e-green);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: min(1200px, calc(100% - 3rem));
  margin-inline: auto;
}

.page-shell {
  width: min(1200px, calc(100% - 3rem));
  margin-inline: auto;
}

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

.content-prose p {
  margin: 0 0 1.2em;
}

.content-prose h2, .content-prose h3 {
  margin-top: 1.8em;
}

/* ===================== 顶部比分条 ===================== */
.match-ticker {
  position: relative;
  z-index: 100;
  background: var(--night);
  border-bottom: 1px solid rgba(34, 255, 136, 0.35);
  overflow: hidden;
  padding: 0.35rem 0;
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  font-size: 0.875rem;
}

.ticker-track {
  display: flex;
  width: max-content;
  animation: ticker-scroll 28s linear infinite;
  will-change: transform;
}

.match-ticker:hover .ticker-track,
.match-ticker:focus-within .ticker-track {
  animation-play-state: paused;
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 2rem;
  color: var(--text-light);
  white-space: nowrap;
  border-right: 1px solid rgba(160, 174, 192, 0.2);
  transition: color var(--transition-fast);
}

.ticker-item::before {
  content: "⚡";
  color: var(--e-green);
  margin-right: 0.5rem;
  font-size: 0.9em;
}

.ticker-item:hover {
  color: var(--e-green);
}

@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===================== 头部 ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  padding: 0.8rem 0;
  background: rgba(10, 14, 26, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(124, 58, 237, 0.25);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: min(1400px, calc(100% - 3rem));
  margin-inline: auto;
}

.brand-lockup {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--white);
  line-height: 1;
  position: relative;
  padding: 0.3rem 0.6rem 0.3rem 0;
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  background: linear-gradient(90deg, rgba(124,58,237,0.25) 0%, transparent 70%);
}

.brand-mark {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-ver {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--night);
  background: var(--e-green);
  padding: 0.15rem 0.45rem;
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
}

.nav-toggle {
  display: none;
  width: 2.6rem;
  height: 2.6rem;
  flex-direction: column;
  justify-content: center;
  gap: 0.35rem;
  background: rgba(124, 58, 237, 0.2);
  border: 1px solid rgba(124, 58, 237, 0.5);
  clip-path: polygon(10% 0, 100% 0, 90% 100%, 0 100%);
  padding: 0.4rem 0.7rem;
}

.nav-toggle-line {
  display: block;
  height: 2px;
  background: var(--e-green);
  transition: transform var(--transition-fast);
}

body[data-open] .nav-toggle .nav-toggle-line:nth-child(1) {
  transform: translateY(0.35rem) rotate(45deg);
}

body[data-open] .nav-toggle .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

body[data-open] .nav-toggle .nav-toggle-line:nth-child(3) {
  transform: translateY(-0.35rem) rotate(-45deg);
}

.primary-nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-list a {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-light);
  border: 1px solid transparent;
  border-radius: 999px;
  transition: all var(--transition-fast);
}

.nav-list a:hover {
  color: var(--white);
  background: rgba(124, 58, 237, 0.25);
  border-color: rgba(124, 58, 237, 0.4);
}

.nav-list a[aria-current="page"] {
  color: var(--night);
  background: var(--e-green);
  box-shadow: 0 0 12px rgba(34, 255, 136, 0.4);
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(78vw, 320px);
    background: rgba(10, 14, 26, 0.96);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: flex-start;
    padding: 6rem 2rem 2rem;
    transform: translateX(-100%);
    transition: transform var(--transition-smooth);
    border-right: 2px solid var(--e-purple);
    z-index: 600;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    width: 100%;
  }

  .nav-list a {
    display: block;
    width: 100%;
    font-size: 1.2rem;
    border-radius: 8px;
  }

  .nav-toggle {
    position: relative;
    z-index: 700;
  }

  .site-header {
    padding: 0.5rem 0;
  }
}

@media (max-width: 520px) {
  .brand-lockup {
    font-size: 1.1rem;
  }

  .brand-ver {
    display: none;
  }

  .page-shell, .container {
    width: min(100% - 2rem, 1200px);
  }
}

/* ===================== 面包屑 ===================== */
.breadcrumb {
  margin: 1rem 0 0;
}

.crumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  font-size: 0.85rem;
  color: var(--metal);
}

.crumb-list li+li::before {
  content: "→";
  margin-right: 0.4rem;
  color: var(--e-purple);
}

.crumb-list a:hover {
  color: var(--e-green);
}

.crumb-list [aria-current] {
  color: var(--white);
  font-weight: 700;
}

/* ===================== 按钮 ===================== */
.btn-primary,
.btn-ghost,
.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.4rem;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 0;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--grad-primary);
  color: var(--white);
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.btn-primary:hover {
  transform: translateX(4px);
  box-shadow: 0 8px 20px rgba(124, 58, 237, 0.35);
}

.btn-ghost {
  color: var(--text-light);
  border: 1px solid var(--metal);
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

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

.btn-accent {
  background: var(--e-green);
  color: var(--night);
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  font-weight: 700;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.btn-accent:hover {
  box-shadow: 0 0 20px rgba(34, 255, 136, 0.35);
}

/* ===================== 页面基础区 ===================== */
.blueprint-bg {
  position: relative;
  background-color: var(--night);
  background-image:
    linear-gradient(rgba(34, 255, 136, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 255, 136, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(160, 174, 192, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 174, 192, 0.08) 1px, transparent 1px);
  background-size: 80px 80px, 80px 80px, 16px 16px, 16px 16px;
}

.blueprint-bg::before {
  content: "YAXING // DATA FLOW // GRID 01";
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  font-size: 0.65rem;
  color: rgba(34, 255, 136, 0.4);
  letter-spacing: 0.15em;
  pointer-events: none;
}

@media (max-width: 640px) {
  .blueprint-bg { background-size: 60px 60px, 60px 60px, 12px 12px, 12px 12px; }
}

/* 坐标线 */
.grid-line-x,
.grid-line-y {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

.grid-line-x {
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(124, 58, 237, 0.4), transparent);
}

.grid-line-y {
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(34, 255, 136, 0.25), transparent);
}

/* ===================== 资料卡 ===================== */
.data-card {
  position: relative;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(160, 174, 192, 0.25);
  padding: 1.5rem;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.data-card:hover {
  border-color: rgba(124, 58, 237, 0.7);
  transform: translateY(-4px);
}

.card-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--night);
  background: var(--e-green);
  padding: 0.2rem 0.7rem;
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
  text-transform: uppercase;
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
}

.card-tag[data-tone="purple"] {
  background: var(--e-purple);
  color: var(--white);
}

.card-tag[data-tone="wine"] {
  background: var(--wine);
  color: var(--white);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 900;
  margin: 0.8rem 0 0.4rem;
}

.card-meta {
  font-size: 0.85rem;
  color: var(--metal);
}

.card-meta .stat {
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  color: var(--e-green);
}

/* ===================== 数据网格与统计 ===================== */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

@media (max-width: 800px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px) {
  .stat-grid { grid-template-columns: 1fr; }
}

.stat-block {
  background: rgba(124, 58, 237, 0.08);
  border-left: 3px solid var(--e-purple);
  padding: 0.8rem 1rem;
}

.stat-number {
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  font-weight: 700;
  color: var(--e-green);
  font-size: 1.4rem;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--metal);
}

/* ===================== 侧注释 ===================== */
.side-note {
  display: inline-block;
  writing-mode: vertical-rl;
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--metal);
  text-transform: uppercase;
}

.side-note[data-tone="green"] {
  color: var(--e-green);
}

/* ===================== 媒体占位 ===================== */
.media-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(124,58,237,0.15) 0%, rgba(10,14,26,0.9) 100%);
  border: 1px solid rgba(160, 174, 192, 0.3);
  aspect-ratio: 16 / 9;
  min-height: 0;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, transparent 40%, rgba(34, 255, 136, 0.08) 50%, transparent 60%);
  pointer-events: none;
}

.media-label {
  position: absolute;
  left: 0.8rem;
  bottom: 0.6rem;
  font-size: 0.8rem;
  color: var(--text-light);
  background: rgba(10, 14, 26, 0.7);
  padding: 0.2rem 0.8rem;
  border-left: 2px solid var(--e-green);
  font-weight: 700;
  z-index: 2;
}

.media-index {
  position: absolute;
  top: 0.8rem;
  right: 0.8rem;
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  font-size: 0.7rem;
  color: rgba(34, 255, 136, 0.6);
  z-index: 2;
}

/* ===================== 滚动进度 ===================== */
.progress-line {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--e-purple), var(--e-green));
  z-index: 1000;
  pointer-events: none;
}

/* ===================== 返回顶部 ===================== */
.top-link {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 400;
  width: 2.8rem;
  height: 2.8rem;
  background: var(--e-purple);
  color: var(--white);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 0.5rem;
  font-size: 1rem;
  box-shadow: 0 0 12px rgba(124, 58, 237, 0.5);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all var(--transition-fast);
}

.top-link[data-visible="true"] {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.top-link:hover {
  background: var(--e-green);
  color: var(--night);
}

/* ===================== 页脚 ===================== */
.site-footer {
  position: relative;
  background: var(--teal);
  color: var(--text-light);
  border-top: 2px solid rgba(34, 255, 136, 0.3);
  margin-top: 4rem;
  padding: 3rem 0 1.5rem;
  overflow: hidden;
}

.site-footer::before {
  content: "YAXING // SPEED // DATA";
  position: absolute;
  top: 1rem;
  right: 2rem;
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: rgba(34, 255, 136, 0.3);
}

.footer-shell {
  width: min(1200px, calc(100% - 3rem));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
}

.footer-brand .footer-logo {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--white);
  display: inline-block;
  margin-bottom: 0.8rem;
  border-bottom: 2px solid var(--e-green);
}

.footer-slogan {
  font-size: 0.9rem;
  color: rgba(226, 232, 240, 0.75);
  max-width: 34ch;
  margin: 0.8rem 0 0;
}

.footer-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--e-green);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.8rem;
  font-family: "Roboto Mono", "JetBrains Mono", monospace;
}

.footer-links ul,
.footer-contact ul {
  display: grid;
  gap: 0.45rem;
  font-size: 0.9rem;
}

.footer-links a,
.footer-contact a {
  color: var(--text-light);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-links a:hover,
.footer-contact a:hover {
  color: var(--e-green);
  padding-left: 4px;
}

.footer-contact ul li:last-child {
  color: rgba(226, 232, 240, 0.65);
  font-size: 0.85rem;
}

.footer-legal {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(226, 232, 240, 0.15);
  margin-top: 2rem;
  padding-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.78rem;
  color: rgba(226, 232, 240, 0.65);
}

.footer-legal ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.footer-legal a:hover {
  color: var(--e-green);
}

@media (max-width: 800px) {
  .footer-shell {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {
  .footer-shell {
    grid-template-columns: 1fr;
  }
}

/* ===================== 内容通用 ===================== */
.hero-panel,
.grid-2col,
.grid-3col {
  position: relative;
}

.grid-2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.grid-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 800px) {
  .grid-3col { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .grid-2col { grid-template-columns: 1fr; }
}

/* 通用标题 */
.section-title {
  position: relative;
  display: inline-block;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 900;
  padding-left: 1rem;
  margin-bottom: 1rem;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 100%, 0 100%);
  background: linear-gradient(90deg, var(--e-purple) 0%, transparent 100%);
}

.section-title[data-accent="green"] {
  background: linear-gradient(90deg, rgba(34,255,136,0.5) 0%, transparent 100%);
}

/* form 不用，也不加 form 样式 */

/* ===================== 可访问性 & 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;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal[data-revealed="true"] {
  opacity: 1;
  transform: none;
}