/* ==========================================
   幻影体育 / huan-sports.com.cn
   全站共享样式 / assets/site.css
   ========================================== */

/* ---- CSS Variables ---- */
:root {
  --color-primary: #0A0F1F;
  --color-primary-alt: #10182F;
  --color-grid: #1A2340;
  --color-accent1: #F7D038;
  --color-accent2: #3DFF9A;
  --color-text-primary: #E5E9F0;
  --color-text-secondary: #A8B0C8;
  --color-text-dim: #5A6A8F;
  --color-surface: #0D1424;
  --color-border: #2A3150;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Rajdhani", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "SFMono-Regular", monospace;
  --header-width: 280px;
  --container-max: 1200px;
  --ease: 200ms ease;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-primary);
  background-color: var(--color-primary);
  background-image:
    linear-gradient(rgba(26, 35, 64, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 35, 64, 0.18) 1px, transparent 1px);
  background-size: 56px 56px;
  min-height: 100vh;
}

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

a {
  color: var(--color-accent1);
  text-decoration: none;
  transition: color var(--ease);
}

a:hover {
  color: var(--color-accent2);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.02em;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }

:focus-visible {
  outline: 2px solid var(--color-accent1);
  outline-offset: 3px;
}

/* ---- Skip Link ---- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 2000;
  padding: 10px 20px;
  background: var(--color-accent1);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition: top var(--ease);
}

.skip-link:focus {
  top: 16px;
  color: var(--color-primary);
}

/* ---- Layout: Main & Page Shell ---- */
.main-content {
  min-height: 60vh;
  padding: 32px 0 64px;
}

.page-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-primary-alt);
  border-bottom: 1px solid var(--color-border);
}

.site-header__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text-primary);
  min-width: 0;
}

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

.brand__glyph {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  background: var(--color-accent1);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% 74%, 74% 100%, 0 100%);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand__domain {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-text-dim);
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 0;
  cursor: pointer;
  padding: 10px;
  transition: border-color var(--ease);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text-primary);
  transition: transform var(--ease), opacity var(--ease), background var(--ease);
}

.nav-toggle:hover {
  border-color: var(--color-accent1);
}

.nav-toggle:hover .nav-toggle__bar {
  background: var(--color-accent1);
}

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

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

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

.header-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
  padding: 0 16px;
  background: var(--color-primary);
  border-top: 1px solid var(--color-border);
}

.header-chapter {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.header-chapter__label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  color: var(--color-text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 2px 5px;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.header-chapter__text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-download-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-accent2);
  white-space: nowrap;
  padding: 4px 10px;
  border: 1px solid rgba(61, 255, 154, 0.3);
  transition: background var(--ease), border-color var(--ease), color var(--ease);
}

.header-download-link:hover {
  color: var(--color-primary);
  background: var(--color-accent2);
  border-color: var(--color-accent2);
}

.header-download-link__icon {
  font-size: 14px;
  line-height: 1;
}

.site-nav {
  position: fixed;
  top: 104px;
  left: 0;
  bottom: 0;
  width: 300px;
  background: var(--color-primary-alt);
  border-right: 1px solid var(--color-border);
  transform: translateX(-100%);
  transition: transform var(--ease);
  display: flex;
  flex-direction: column;
  padding: 16px 0 24px;
  overflow-y: auto;
}

.site-nav[data-open="true"] {
  transform: translateX(0);
  box-shadow: 12px 0 40px rgba(0, 0, 0, 0.5);
}

.nav-list {
  flex: 1;
  counter-reset: nav-index;
}

.nav-item {
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 24px;
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: color var(--ease), background var(--ease);
}

.nav-link::before {
  counter-increment: nav-index;
  content: "0" counter(nav-index);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-dim);
  transition: color var(--ease);
}

.nav-link:hover {
  color: var(--color-text-primary);
  background: rgba(247, 208, 56, 0.05);
}

.nav-link:hover::before {
  color: var(--color-accent1);
}

.nav-link[aria-current="page"] {
  color: var(--color-accent1);
  background: linear-gradient(90deg, rgba(247, 208, 56, 0.1), transparent);
}

.nav-link[aria-current="page"]::before {
  color: var(--color-accent1);
}

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--color-accent1);
  clip-path: polygon(0 0, 100% 30%, 100% 70%, 0 100%);
}

.nav-meta {
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-meta__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-accent2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-meta__version {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-text-dim);
  letter-spacing: 0.08em;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--color-accent2);
  border-radius: 50%;
  animation: status-pulse 2s ease-in-out infinite;
}

@keyframes status-pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(61, 255, 154, 0.5);
  }
  50% {
    opacity: 0.65;
    box-shadow: 0 0 10px 2px rgba(61, 255, 154, 0.25);
  }
}

.header-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(26, 35, 64, 0.6);
  overflow: hidden;
}

.header-progress__bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent1), var(--color-accent2));
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-primary-alt);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 0;
}

.footer-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.footer-column--contact .footer-address {
  gap: 8px;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

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

.footer-links a {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--color-accent1);
}

.footer-trust {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.footer-address {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-address__line {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-dim);
}

.footer-bottom__copyright span {
  color: var(--color-text-secondary);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  color: var(--color-text-primary);
  background: transparent;
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 100%, 10px 100%);
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

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

.btn--primary {
  background: var(--color-accent1);
  border-color: var(--color-accent1);
  color: var(--color-primary);
}

.btn--primary:hover {
  background: #ffe066;
  border-color: #ffe066;
  color: var(--color-primary);
}

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

.btn--ghost:hover {
  border-color: var(--color-accent1);
  color: var(--color-accent1);
}

.btn--accent {
  background: var(--color-accent2);
  border-color: var(--color-accent2);
  color: var(--color-primary);
}

.btn--accent:hover {
  filter: brightness(1.1);
  color: var(--color-primary);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ---- Breadcrumb ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-dim);
  margin-bottom: 24px;
}

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

.breadcrumb a:hover {
  color: var(--color-accent1);
}

.breadcrumb__sep {
  color: var(--color-text-dim);
}

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

/* ---- Grid ---- */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

/* ---- Figure ---- */
.figure {
  position: relative;
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

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

.figure--4x3::before {
  padding-top: 75%;
}

.figure--1x1::before {
  padding-top: 100%;
}

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

.figure__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-dim);
  background:
    linear-gradient(135deg, rgba(26, 35, 64, 0.4), transparent 60%),
    repeating-linear-gradient(45deg, transparent 0 12px, rgba(26, 35, 64, 0.3) 12px 13px);
}

.figure__placeholder::before {
  content: "";
  display: block;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-left-color: var(--color-accent1);
  transform: rotate(45deg);
}

/* ---- Tag ---- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent1);
  background: rgba(247, 208, 56, 0.08);
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

/* ---- Typography Helpers ---- */
.section-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.text-secondary {
  color: var(--color-text-secondary);
}

.mono {
  font-family: var(--font-mono);
}

/* ---- Responsive: Tablet & Mobile ---- */
@media (max-width: 1023px) {
  .main-content {
    padding-top: 120px;
    padding-bottom: 40px;
  }

  .footer-shell {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
}

@media (max-width: 767px) {
  .page-shell {
    padding: 0 16px;
  }

  .footer-shell {
    grid-template-columns: 1fr;
    padding: 0 16px 32px;
    gap: 24px;
  }

  .footer-bottom {
    padding: 12px 16px;
    flex-direction: column;
    text-align: center;
  }

  .section-title {
    font-size: 26px;
  }

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

/* ---- Responsive: Desktop Sidebar ---- */
@media (min-width: 1024px) {
  .site-header {
    right: auto;
    bottom: 0;
    width: var(--header-width);
    height: 100vh;
    border-right: 1px solid var(--color-border);
    border-bottom: none;
    display: flex;
    flex-direction: column;
  }

  .site-header__top {
    flex-direction: column;
    align-items: flex-start;
    height: auto;
    padding: 28px 24px 16px;
    gap: 16px;
  }

  .nav-toggle {
    display: none;
  }

  .header-strip {
    height: auto;
    padding: 0 24px 16px;
    background: transparent;
    border-top: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .site-nav,
  .site-nav[data-open="true"] {
    position: static;
    transform: none;
    box-shadow: none;
    width: auto;
    height: auto;
    border-right: none;
    flex: 1;
    padding: 8px 0 16px;
    overflow-y: auto;
  }

  .nav-link {
    padding: 12px 24px;
  }

  .main-content,
  .site-footer {
    margin-left: var(--header-width);
  }

  .footer-shell {
    grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  }

  .page-shell {
    padding: 0 32px;
  }

  .header-progress {
    right: auto;
    width: 100%;
  }
}

/* ---- Reduced Motion ---- */
@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;
  }

  .status-dot {
    animation: none !important;
    box-shadow: none !important;
  }
}