/* ============================================================
   6686体育 — 共享 Site Kit
   主题：赛事遥测台 Race Telemetry
   文件：/assets/site.css
   ============================================================ */

/* ---------- Reset & Design Tokens ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}

:root {
  --bg-deep: #0A0E17;
  --bg-panel: #121A2A;
  --accent-primary: #FF6B35;
  --accent-electric: #00E5FF;
  --text-primary: #E8EDF5;
  --text-secondary: #94A3B8;
  --data-success: #4CAF50;
  --data-warning: #FFB020;
  --data-error: #FF4D4F;
  --line-subtle: rgba(255, 255, 255, 0.08);

  --font-display: "Archivo Black", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --fs-hero: clamp(56px, 8vw, 72px);
  --fs-h1: clamp(40px, 5vw, 56px);
  --fs-h2: clamp(28px, 3.5vw, 36px);
  --fs-h3: clamp(20px, 2vw, 24px);
  --fs-body: 16px;
  --fs-caption: 13px;
  --fs-index: 12px;

  --header-height: 76px;
  --container-max: 1280px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;

  --radius: 14px;
  --radius-sm: 6px;
  --skew: -4deg;
}

/* ---------- Base ---------- */
html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin: 0 0 0.4em;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p {
  margin: 0 0 1em;
}

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

:focus-visible {
  outline: 2px solid var(--accent-electric);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: rgba(255, 107, 53, 0.35);
  color: var(--text-primary);
}

/* ---------- Container ---------- */
.site-container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

/* ---------- Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 300;
  display: inline-block;
  background: var(--accent-primary);
  color: var(--bg-deep);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  padding: 14px 20px;
  border-radius: 0 0 8px 8px;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  transition: top 0.2s ease;
}

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

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header[data-scrolled] {
  background: rgba(10, 14, 23, 0.88);
  border-bottom-color: var(--line-subtle);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--accent-electric);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.6);
  z-index: 2;
  border-radius: 0 2px 2px 0;
}

.site-header__inner {
  position: relative;
  z-index: 1;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* Brand */
.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-primary);
  text-decoration: none;
  flex-shrink: 0;
}

.site-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-primary) 0%, #FF8A50 100%);
  color: var(--bg-deep);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 900;
  line-height: 1;
  border-radius: 6px 10px 6px 10px;
  transform: skewX(var(--skew));
}

.site-header__brand-text {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.02em;
  transform: skewX(var(--skew));
  white-space: nowrap;
}

/* Badge */
.site-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--accent-electric);
  border: 1px solid rgba(0, 229, 255, 0.4);
  background: rgba(0, 229, 255, 0.08);
  padding: 2px 7px;
  border-radius: 3px;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

/* Navigation Toggle */
.site-header__toggle {
  display: none;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line-subtle);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-primary);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.site-header__toggle:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
}

.site-header__toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
}

.site-header__toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

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

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

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

.site-header__toggle-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
}

/* Navigation */
.site-header__nav {
  display: flex;
  align-items: center;
}

.site-header__menu {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__item {
  list-style: none;
}

.site-header__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-decoration: none;
  position: relative;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-header__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}

.site-header__link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.site-header__link:hover::after {
  transform: scaleX(1);
}

.site-header__link[aria-current="page"],
.site-header__link[data-scrollspy-active] {
  color: var(--text-primary);
}

.site-header__link[aria-current="page"]::after,
.site-header__link[data-scrollspy-active]::after {
  transform: scaleX(1);
}

.site-header__index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-primary);
  opacity: 0.75;
}

/* ---------- Mobile Header ---------- */
@media (max-width: 960px) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__inner {
    gap: var(--space-2);
  }

  .site-header__nav {
    position: fixed;
    top: var(--header-height);
    left: var(--space-2);
    right: var(--space-2);
    background: rgba(18, 26, 42, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--line-subtle);
    border-radius: 0 0 var(--radius) var(--radius);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.4);
    padding: var(--space-2);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s;
  }

  .site-header__nav[data-open] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-header__menu {
    flex-direction: column;
    align-items: stretch;
  }

  .site-header__link {
    display: flex;
    width: 100%;
    padding: 14px 12px;
    border-radius: 8px;
  }

  .site-header__link::after {
    display: none;
  }

  .site-header__link[aria-current="page"],
  .site-header__link[data-scrollspy-active] {
    background: rgba(255, 107, 53, 0.1);
  }
}

@media (max-width: 480px) {
  .site-header__brand-text {
    font-size: 18px;
  }

  .site-header__logo-mark {
    width: 34px;
    height: 34px;
    font-size: 14px;
  }

  .site-header__toggle-label {
    display: none;
  }
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  margin-top: var(--space-6);
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-panel) 100%);
  border-top: 1px solid var(--line-subtle);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary) 0%, var(--accent-primary) 45%, var(--accent-electric) 100%);
  opacity: 0.9;
}

.site-footer__watermark {
  position: absolute;
  right: 24px;
  bottom: -20px;
  font-family: var(--font-display);
  font-size: clamp(160px, 24vw, 300px);
  line-height: 1;
  color: rgba(255, 255, 255, 0.03);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.site-footer__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: var(--space-4);
  padding-top: var(--space-5);
  padding-bottom: var(--space-5);
}

.site-footer__col--brand {
  padding-right: var(--space-2);
}

.site-footer__col--nav,
.site-footer__col--data,
.site-footer__col--legal {
  display: flex;
  flex-direction: column;
}

.site-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.site-footer__brand-text {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--text-primary);
  transform: skewX(var(--skew));
}

.site-footer__intro {
  margin: var(--space-2) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 40ch;
}

.site-footer__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: var(--space-3);
  padding: 8px 12px;
  background: rgba(76, 175, 80, 0.08);
  border: 1px solid rgba(76, 175, 80, 0.2);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--data-success);
  letter-spacing: 0.02em;
}

.site-footer__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--data-success);
  animation: statusPulse 2.2s ease-out infinite;
}

.site-footer__status-text {
  white-space: nowrap;
}

@keyframes statusPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.45);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(76, 175, 80, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0);
  }
}

.site-footer__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 var(--space-2);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-subtle);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.08em;
}

.site-footer__index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-primary);
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.site-footer__link {
  display: inline-block;
  padding: 3px 0;
  color: var(--text-secondary);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.site-footer__note {
  margin: 0 0 var(--space-2);
  padding-left: 12px;
  border-left: 2px solid var(--accent-electric);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.site-footer__icp {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--line-subtle);
}

.site-footer__contact-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.site-footer__contact-phone {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

.site-footer__bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line-subtle);
  padding: var(--space-2) 0;
  background: rgba(10, 14, 23, 0.4);
}

.site-footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.site-footer__copyright {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

@media (max-width: 960px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4) var(--space-3);
  }
}

@media (max-width: 600px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .site-footer__col--brand {
    padding-right: 0;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- Shared Components ---------- */
.site-section {
  padding-block: var(--space-5);
}

.site-section--tight {
  padding-block: var(--space-4);
}

.site-page-head {
  padding-top: calc(var(--header-height) + var(--space-5));
}

.site-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--accent-primary);
  text-transform: uppercase;
}

.site-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 1px;
  flex-shrink: 0;
}

.site-panel {
  background: var(--bg-panel);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius);
  padding: var(--space-3);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-panel:hover {
  border-color: rgba(0, 229, 255, 0.25);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(0, 229, 255, 0.08);
}

.site-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent-primary);
  color: var(--bg-deep);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  padding: 13px 26px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transform: skewX(var(--skew));
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.25);
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.site-btn:hover {
  background: #FF8248;
  box-shadow: 0 10px 28px rgba(255, 107, 53, 0.35);
  transform: skewX(var(--skew)) translateY(-1px);
}

.site-btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--line-subtle);
  box-shadow: none;
}

.site-btn--ghost:hover {
  background: rgba(0, 229, 255, 0.06);
  border-color: rgba(0, 229, 255, 0.4);
  color: var(--accent-electric);
  box-shadow: none;
  transform: skewX(var(--skew)) translateY(-1px);
}

.site-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 var(--space-3);
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--text-secondary);
}

.site-breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.site-breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--text-secondary);
  opacity: 0.5;
}

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

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

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

.site-grid {
  display: grid;
  gap: var(--space-3);
}

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

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

.site-grid--aside {
  grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
  align-items: start;
}

@media (max-width: 960px) {
  .site-grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-grid--aside {
    grid-template-columns: 1fr;
  }
}

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

.site-divider {
  display: block;
  height: 2px;
  border: none;
  margin: var(--space-4) 0;
  background: linear-gradient(90deg, var(--accent-primary) 0%, transparent 70%);
  border-radius: 1px;
}

/* ---------- Image Containers ---------- */
.site-figure {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 107, 53, 0.06), rgba(0, 229, 255, 0.03)),
    var(--bg-panel);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius);
}

.site-figure::before {
  content: "";
  display: block;
}

.site-figure--wide::before {
  padding-top: 56.25%;
}

.site-figure--square::before {
  padding-top: 100%;
}

.site-figure--portrait::before {
  padding-top: 125%;
}

.site-figure > img,
.site-figure > svg,
.site-figure > video,
.site-figure > canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-figure__caption {
  position: absolute;
  left: var(--space-2);
  bottom: var(--space-2);
  z-index: 1;
  max-width: calc(100% - var(--space-4));
  background: rgba(10, 14, 23, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 5px 10px;
  border-radius: 4px;
  border-left: 2px solid var(--accent-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-primary);
}

/* ---------- Reveal Protocol ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

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

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }

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