/* =========================================================
   绿茵体育 · 全站共享样式
   File: /assets/site.css
   ========================================================= */

/* ---------- 1. CSS Variables ---------- */
:root {
  --color-primary: #00C853;
  --color-primary-dark: #1B5E20;
  --color-accent: #76FF03;
  --color-gold: #D4AF37;
  --color-bg: #0B0F0B;
  --color-panel: #122018;
  --color-text: #E0F2E0;
  --color-text-secondary: #9CB39C;
  --color-border: #2E7D32;
  --color-shadow: rgba(0, 0, 0, 0.5);

  --font-headline: 'Oswald', 'Arial Narrow', Impact, 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Roboto Mono', 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', monospace;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  --container-max: 1280px;
  --container-pad: 1.5rem;
  --header-height: 76px;

  --radius-sm: 4px;
  --radius-md: 8px;

  --z-header: 100;
  --z-progress: 150;
  --z-skip: 1000;

  --transition: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ---------- 2. Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(to right, rgba(46, 125, 50, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46, 125, 50, 0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body > main {
  flex: 1;
  width: 100%;
}

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

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

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

ul,
ol {
  list-style: none;
}

address {
  font-style: normal;
}

/* ---------- 3. Typography ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-headline);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--color-text);
  text-transform: none;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

p {
  margin-bottom: var(--space-md);
}

::selection {
  background: var(--color-primary);
  color: var(--color-bg);
}

/* ---------- 4. Layout Utilities ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

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

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

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

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

.btn-ghost:hover {
  background-color: rgba(0, 200, 83, 0.1);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---------- 6. Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: var(--space-md);
  z-index: var(--z-skip);
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition: top var(--transition);
}

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

/* ---------- 7. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(11, 15, 11, 0.94);
  background-image:
    linear-gradient(to right, rgba(46, 125, 50, 0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46, 125, 50, 0.1) 1px, transparent 1px);
  background-size: 24px 24px;
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 55%, var(--color-gold) 100%);
  z-index: 1;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  position: relative;
}

/* ---------- 8. Brand ---------- */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  text-decoration: none;
  flex-shrink: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  filter: drop-shadow(0 0 6px rgba(0, 200, 83, 0.35));
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-headline);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ---------- 9. Navigation ---------- */
.nav-toggle {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.85rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background-color var(--transition), box-shadow var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-link:hover {
  color: var(--color-accent);
  background-color: rgba(118, 255, 3, 0.06);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current='page'] {
  color: var(--color-accent);
  background-color: rgba(0, 200, 83, 0.14);
  box-shadow: inset 0 -2px 0 var(--color-primary);
}

.nav-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 400;
  color: var(--color-primary);
  letter-spacing: 0.06em;
}

.nav-label {
  white-space: nowrap;
}

/* ---------- 10. Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
  z-index: var(--z-progress);
  pointer-events: none;
  transition: width 0.1s linear;
}

/* ---------- 11. Footer ---------- */
.site-footer {
  background-color: var(--color-panel);
  background-image:
    linear-gradient(to right, rgba(46, 125, 50, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46, 125, 50, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  border-top: 2px solid var(--color-primary-dark);
  padding-top: var(--space-xl);
  margin-top: var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-xl) var(--space-lg);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  margin-bottom: var(--space-md);
}

.footer-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.footer-brand-name {
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.footer-trust {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  padding-left: var(--space-md);
  border-left: 2px solid var(--color-primary);
}

.footer-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  opacity: 0.8;
  line-height: 1.6;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.footer-heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 36px;
  height: 2px;
  background: var(--color-primary);
}

.footer-list li {
  margin-bottom: var(--space-xs);
}

.footer-list li::before {
  content: '/';
  font-family: var(--font-mono);
  color: var(--color-primary);
  margin-right: 6px;
  font-size: 0.8rem;
}

.footer-link {
  display: inline-block;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-link:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-address {
  font-style: normal;
  font-size: 0.875rem;
  line-height: 2;
  color: var(--color-text-secondary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: var(--space-lg) 0;
}

.footer-copyright,
.footer-icp {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  opacity: 0.9;
}

/* ---------- 12. Breadcrumbs ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  color: var(--color-border);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

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

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

/* ---------- 13. Panels ---------- */
.panel {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-lg);
  box-shadow: 0 4px 20px var(--color-shadow);
}

.panel-notch {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  transition: box-shadow var(--transition), border-color var(--transition);
}

.panel-notch:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 30px rgba(0, 200, 83, 0.08);
}

/* ---------- 14. Section Index ---------- */
.section-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 0.14em;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.section-index span {
  color: var(--color-primary);
  font-weight: 500;
}

.section-index::before {
  content: '';
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--color-primary);
}

/* ---------- 15. Prose ---------- */
.prose {
  max-width: 72ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
}

.prose h1,
.prose h2,
.prose h3 {
  margin-top: 2em;
  margin-bottom: 0.6em;
}

.prose p {
  margin-bottom: 1.5em;
}

.prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-primary-dark);
}

.prose a:hover {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent);
}

.prose ul {
  list-style: none;
  margin-bottom: 1.5em;
}

.prose ul li {
  padding-left: 1.25rem;
  position: relative;
}

.prose ul li::before {
  content: '/';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-family: var(--font-mono);
}

/* ---------- 16. Image Frame ---------- */
.img-frame {
  position: relative;
  background-color: var(--color-panel);
  background-image:
    linear-gradient(to right, rgba(46, 125, 50, 0.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46, 125, 50, 0.14) 1px, transparent 1px);
  background-size: 20px 20px;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.img-frame img,
.img-frame svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 17. Focus Visible ---------- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 18. Responsive ---------- */
@media (max-width: 1200px) {
  .footer-grid {
    grid-template-columns: 1.2fr 1fr 1fr;
  }

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

@media (max-width: 1023px) {
  :root {
    --header-height: 64px;
    --container-pad: 1rem;
  }

  /* Hide desktop brand text */
  .brand-sub {
    display: none;
  }

  /* Mobile nav toggle */
  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background-color: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition), border-color var(--transition);
    padding: 0;
  }

  .nav-toggle:hover {
    background-color: rgba(0, 200, 83, 0.1);
    border-color: var(--color-primary);
  }

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

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

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

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

  /* Mobile nav panel */
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-panel);
    background-image:
      linear-gradient(to right, rgba(46, 125, 50, 0.08) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(46, 125, 50, 0.08) 1px, transparent 1px);
    background-size: 24px 24px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 12px 24px var(--color-shadow);
    padding: var(--space-md) 0;
  }

  .site-nav[data-open] {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-item {
    border-bottom: 1px solid rgba(46, 125, 50, 0.35);
  }

  .nav-item:last-child {
    border-bottom: none;
  }

  .nav-link {
    padding: 0.85rem var(--container-pad);
    border-radius: 0;
    font-size: 1rem;
    color: var(--color-text);
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current='page'] {
    background-color: rgba(0, 200, 83, 0.14);
    box-shadow: inset 3px 0 0 var(--color-primary);
  }

  .nav-link:hover {
    background-color: rgba(118, 255, 3, 0.06);
  }

  .nav-num {
    font-size: 0.75rem;
  }

  /* Footer adjustments */
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

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

@media (max-width: 767px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .container {
    padding-left: var(--container-pad);
    padding-right: var(--container-pad);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .brand-name {
    font-size: 1.15rem;
  }

  .section-index {
    font-size: 0.75rem;
  }
}

/* ---------- 19. 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;
  }

  .scroll-progress {
    transition: none;
  }

  .nav-bar {
    transition: none;
  }
}