/*==============================
  火狐体育 Shared Site Kit CSS
  ==============================*/

:root {
  --color-primary: #FF6B35;
  --color-primary-strong: #FF4500;
  --color-accent: #00BFFF;
  --color-accent-bright: #00E5FF;
  --color-yellow: #FFD700;
  --color-bg: #121212;
  --color-bg-elev: #1E1E1E;
  --color-bg-card: #2A2A2A;
  --color-text: #F5F5F5;
  --color-text-muted: #9E9E9E;
  --color-border: #333;
  --color-white: #FFFFFF;

  --rail-width: 280px;
  --topbar-height: 68px;
  --border-width: 2px;
  --shadow: 0 5px 0 rgba(0, 0, 0, 0.6);

  --font-display: Impact, "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

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

html {
  scroll-behavior: smooth;
  scrollbar-color: var(--color-primary) var(--color-bg-elev);
  scrollbar-width: thin;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(135deg, rgba(255,255,255,0.02) 25%, transparent 25%),
    linear-gradient(225deg, rgba(255,255,255,0.02) 25%, transparent 25%),
    linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
    linear-gradient(315deg, rgba(255,255,255,0.02) 25%, transparent 25%);
  background-size: 16px 16px;
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

ul,
ol {
  list-style: none;
}

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

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

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

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

/*========== Skip Link ==========*/
.skip-link {
  position: fixed;
  top: 10px;
  left: 16px;
  z-index: 100000;
  background: var(--color-primary);
  color: #121212;
  padding: 10px 18px;
  font-weight: 700;
  font-size: 14px;
  border-radius: 4px;
  transform: translateY(-300%);
  transition: transform 0.2s ease;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.6);
}

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

/*========== Main Content ==========*/
#main-content {
  display: block;
  width: 100%;
  min-height: 100vh;
  padding: var(--topbar-height) clamp(16px, 4vw, 48px) 48px;
}

/*========== Header Layout ==========*/
.site-header {
  position: relative;
  display: flex;
  flex-direction: column;
  z-index: 1000;
}

/* Side rail */
.side-rail {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-elev);
  background-image:
    linear-gradient(135deg, rgba(255,107,53,0.04) 25%, transparent 25%),
    linear-gradient(225deg, rgba(255,107,53,0.04) 25%, transparent 25%),
    linear-gradient(45deg, rgba(255,107,53,0.04) 25%, transparent 25%),
    linear-gradient(315deg, rgba(255,107,53,0.04) 25%, transparent 25%);
  background-size: 20px 20px;
  padding: clamp(20px, 3vh, 32px) 16px;
  overflow-y: auto;
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 1px;
  line-height: 1.2;
  text-decoration: none;
  position: relative;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--color-border);
}

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

.brand__mark {
  position: relative;
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
  clip-path: polygon(0 20%, 50% 0, 100% 20%, 75% 100%, 25% 100%);
  box-shadow: 0 0 16px rgba(255, 107, 53, 0.7);
  flex: 0 0 auto;
}

.brand__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 55%;
  width: 6px;
  height: 6px;
  background: var(--color-accent-bright);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 8px var(--color-accent-bright);
}

.brand__name {
  color: inherit;
  text-transform: uppercase;
}

/* Navigation */
.nav-rail {
  margin-top: clamp(24px, 4vh, 48px);
}

.nav-rail__list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-rail__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 4px;
  transition: background-color 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.nav-rail__link:hover {
  background: rgba(255, 107, 53, 0.1);
  border-color: var(--color-primary);
  color: var(--color-white);
  transform: translateX(4px);
}

.nav-rail__link[aria-current="page"] {
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-strong));
  border-color: transparent;
  color: #121212;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.4);
}

.nav-rail__link[aria-current="page"] .nav-rail__index {
  color: #121212;
}

.nav-rail__index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  min-width: 2em;
}

.nav-rail__label {
  line-height: 1;
}

/* Side rail status */
.side-rail__status {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 2px solid var(--color-border);
  padding-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-primary);
  animation: pulse 2s infinite ease-in-out;
}

.status-version {
  margin-left: auto;
  color: var(--color-accent);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* Topbar */
.topbar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  background: linear-gradient(180deg, rgba(18,18,18,0.96), rgba(18,18,18,0.9));
  backdrop-filter: blur(8px);
  z-index: 200;
}

.topbar__route {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.topbar__meta {
  margin-left: auto;
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.topbar__actions {
  display: flex;
  gap: 10px;
}

.topbar__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  background: transparent;
  border: 2px solid var(--color-border);
  border-radius: 2px;
  color: var(--color-text);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: border-color 0.2s, background-color 0.2s, color 0.2s, transform 0.2s;
}

.topbar__btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.topbar__btn--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #121212;
  box-shadow: 0 3px 0 #9a3a12;
}

.topbar__btn--primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #121212;
  box-shadow: 0 3px 0 #0a6f99;
}

.topbar__progress {
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  box-shadow: 0 0 12px rgba(255, 107, 53, 0.8);
  transition: width 0.1s linear;
}

/* Nav Toggle */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  padding: 0;
  position: relative;
  z-index: 1200;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* Overlay */
.rail-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 1050;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s ease;
}

.rail-overlay[hidden] {
  display: block;
}

/*========== Footer ==========*/
.site-footer {
  background-color: var(--color-bg-elev);
  background-image:
    linear-gradient(135deg, rgba(255, 107, 53, 0.05) 25%, transparent 25%),
    linear-gradient(225deg, rgba(255, 107, 53, 0.05) 25%, transparent 25%),
    linear-gradient(45deg, rgba(255, 107, 53, 0.05) 25%, transparent 25%),
    linear-gradient(315deg, rgba(255, 107, 53, 0.05) 25%, transparent 25%);
  background-size: 24px 24px;
  border-top: 3px solid var(--color-primary);
  padding-top: 48px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 48px) 40px;
}

.footer__logo {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--color-white);
  letter-spacing: 1px;
}

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

.footer__tagline {
  margin-top: 8px;
  color: var(--color-text-muted);
  font-size: 14px;
}

.footer__heading {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer__list a {
  color: var(--color-text);
  font-size: 14px;
  transition: color 0.2s, padding-left 0.2s;
}

.footer__list a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}

.footer__contact-line {
  color: var(--color-text-muted);
  font-size: 14px;
  margin-bottom: 6px;
}

.footer__bottom {
  border-top: 2px solid var(--color-border);
  padding: 16px clamp(16px, 4vw, 48px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
}

/*========== Shared Components ==========*/
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  background: transparent;
  border: 2px solid var(--color-primary);
  border-radius: 2px;
  color: var(--color-primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, transform 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--color-primary);
  color: #121212;
}

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

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

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

.card {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
  border-radius: 4px;
  box-shadow: var(--shadow);
  padding: 24px;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.card:hover {
  transform: translateY(-4px) rotate(-0.4deg);
  box-shadow: 0 8px 0 rgba(0, 0, 0, 0.8);
  border-color: var(--color-primary);
}

.card__eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--color-white);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.card p {
  color: var(--color-text-muted);
  font-size: 14px;
}

.l-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 48px);
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

/* Media placeholder */
.media {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
}

.media::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

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

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

.media--wide::before {
  padding-top: 42%;
}

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

/* Scroll reveal */
html.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/*========== Responsive ==========*/
@media (min-width: 1024px) {
  body {
    padding-left: var(--rail-width);
  }

  .site-header {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: var(--rail-width);
    background: var(--color-bg-elev);
    border-right: 3px solid var(--color-primary);
    z-index: 100;
  }

  .side-rail {
    height: 100%;
  }

  .topbar {
    position: fixed;
    top: 0;
    left: var(--rail-width);
    right: 0;
    height: var(--topbar-height);
    padding: 0 24px;
    border-bottom: 2px solid var(--color-border);
  }

  .nav-toggle,
  .rail-overlay {
    display: none;
  }
}

@media (max-width: 1023px) {
  :root {
    --topbar-height: 60px;
  }

  body {
    padding-left: 0;
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--topbar-height);
    background: var(--color-bg-elev);
    border-bottom: 2px solid var(--color-primary);
    z-index: 1000;
  }

  .side-rail {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(320px, 86vw);
    background: var(--color-bg-elev);
    border-right: 3px solid var(--color-primary);
    z-index: 1100;
    transform: translateX(-105%);
    transition: transform 0.28s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

  .site-header[data-rail-open="true"] .side-rail {
    transform: translateX(0);
  }

  .rail-overlay {
    display: block;
  }

  .site-header[data-rail-open="true"] .rail-overlay {
    opacity: 1;
    pointer-events: auto;
  }

  .topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--topbar-height);
    padding: 0 12px;
    gap: 10px;
    border-bottom: 2px solid var(--color-primary);
    z-index: 1000;
  }

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

  .site-header[data-rail-open="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .site-header[data-rail-open="true"] .nav-toggle__bar:nth-child(2) {
    opacity: 0;
  }

  .site-header[data-rail-open="true"] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .topbar__meta {
    display: none;
  }

  .topbar__actions {
    gap: 6px;
  }

  .topbar__btn {
    padding: 7px 10px;
    font-size: 12px;
  }

  .topbar__btn--primary {
    box-shadow: none;
  }

  .topbar__route {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .topbar__btn:first-child {
    display: none;
  }

  #main-content {
    padding-left: 14px;
    padding-right: 14px;
  }
}

@media (max-width: 767px) {
  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

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

  .footer__brand {
    grid-column: auto;
  }

  .footer__bottom {
    justify-content: center;
    text-align: center;
  }
}

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

  html.js-enabled [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .side-rail,
  .rail-overlay,
  .nav-toggle__bar,
  .card,
  .nav-rail__link,
  .btn,
  .topbar__btn,
  .topbar__progress,
  .skip-link {
    transition: none;
  }

  .card:hover,
  .nav-rail__link:hover,
  .btn:hover,
  .topbar__btn:hover {
    transform: none;
  }

  .status-dot {
    animation: none;
  }
}