/* ============================================ *
 * 196体育官方网址 | Site Kit | /assets/site.css
 * 速度档案 · 侧边导览布局
 * ============================================ */

/* ---------- 0. Reset & Tokens ---------- */
:root {
  --c-primary: #0A1F44;
  --c-accent: #FF6A00;
  --c-cyan: #00D4FF;
  --c-indigo: #3C2A6E;
  --c-teal: #0F4C52;
  --c-wine: #7D1F2A;
  --c-cream: #FAF7F2;
  --c-ink: #061020;
  --c-gray: #AAB4C0;

  --font-heading: Oswald, Impact, 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: Roboto, 'Noto Sans SC', 'PingFang SC', sans-serif;
  --font-mono: 'Roboto Mono', 'SFMono-Regular', Consolas, monospace;

  --rail-w: 260px;
  --border-w: 3px;
  --shadow-o: 8px;
  --radius: 2px;
  --ease: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--c-primary);
  color: var(--c-cream);
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-wrap: break-word;
}

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

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

ul,
ol {
  list-style-position: inside;
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  text-wrap: balance;
  line-height: 1.15;
}

hr {
  border: none;
  border-top: 2px solid rgba(170, 180, 192, 0.3);
  margin: 32px 0;
}

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

/* ---------- 1. Focus & Accessibility ---------- */
:focus-visible {
  outline: 3px solid var(--c-cyan);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 0;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  padding: 14px 24px;
  background: var(--c-accent);
  color: var(--c-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 0 0 4px 0;
  transition: top 200ms ease;
}

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

@media (min-width: 1024px) {
  body {
    margin-left: var(--rail-w);
  }
}

/* ---------- 2. Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-cyan));
  transform: scaleX(0);
  transform-origin: left center;
  z-index: 2000;
  pointer-events: none;
}

@media (min-width: 1024px) {
  .scroll-progress {
    left: var(--rail-w);
  }
}

/* ---------- 3. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--c-cream);
  background: transparent;
  border: 2px solid var(--c-gray);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--ease), border-color var(--ease),
              color var(--ease), transform 160ms ease, box-shadow var(--ease);
  line-height: 1.4;
}

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

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

.btn-primary {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-primary);
  font-weight: 700;
  box-shadow: 4px 4px 0 rgba(255, 106, 0, 0.3);
}

.btn-primary:hover {
  background: #ff8534;
  border-color: #ff8534;
  box-shadow: 5px 5px 0 rgba(255, 106, 0, 0.42);
}

.btn-outline-cyan {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.btn-outline-cyan:hover {
  background: rgba(0, 212, 255, 0.08);
  border-color: var(--c-cyan);
}

/* ---------- 4. Content Core ---------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 40px);
}

#main-content {
  flex: 1;
  width: 100%;
  padding-top: 40px;
  outline: none;
}

.page-head {
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 3px solid rgba(0, 212, 255, 0.25);
}

.page-title {
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.page-desc {
  font-size: 1.05rem;
  color: var(--c-gray);
  max-width: 680px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 0 0 16px;
  font-size: 0.88rem;
  color: var(--c-gray);
}

.breadcrumb a {
  color: var(--c-cyan);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  margin: 0 2px;
  color: var(--c-gray);
  opacity: 0.65;
}

.breadcrumb-current {
  color: var(--c-cream);
  font-weight: 500;
}

.section {
  padding: clamp(40px, 6vw, 80px) 0;
}

.section-tight {
  padding: 24px 0;
}

.section-title {
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 14px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  background: var(--c-accent);
}

.section-subtitle {
  font-size: 1.02rem;
  color: var(--c-gray);
  max-width: 640px;
}

/* ---------- 5. Cards & Tags ---------- */
.card {
  background: var(--c-cream);
  color: var(--c-primary);
  border: var(--border-w) solid var(--c-ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow-o) var(--shadow-o) 0 rgba(6, 16, 32, 0.35);
  padding: 24px;
  transition: transform var(--ease), box-shadow var(--ease);
}

.card:hover {
  transform: translate(-2px, -2px);
  box-shadow: calc(var(--shadow-o) + 4px) calc(var(--shadow-o) + 4px) 0 rgba(6, 16, 32, 0.45);
}

.card-flat {
  background: transparent;
  color: var(--c-cream);
  border-color: var(--c-gray);
  box-shadow: none;
}

.card-flat:hover {
  box-shadow: none;
  transform: none;
  border-color: var(--c-cyan);
}

.file-card {
  position: relative;
  background: var(--c-cream);
  color: var(--c-primary);
  border: var(--border-w) solid var(--c-ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow-o) var(--shadow-o) 0 rgba(6, 16, 32, 0.35);
  padding: 26px 24px 24px;
}

.file-card::before {
  content: '';
  position: absolute;
  top: -13px;
  left: 20px;
  width: 64px;
  height: 16px;
  background: var(--c-accent);
  border: 3px solid var(--c-ink);
  border-radius: 4px 4px 0 0;
  transform: skewX(-10deg);
}

.file-card-cyan::before {
  background: var(--c-cyan);
}

.file-card-teal::before {
  background: var(--c-teal);
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 2px solid currentColor;
  border-radius: var(--radius);
  color: var(--c-gray);
  line-height: 1.4;
}

.tag-accent { color: var(--c-accent); }
.tag-cyan { color: var(--c-cyan); }
.tag-wine { color: #f0a0a8; }

.slant-label {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--c-accent);
  color: var(--c-primary);
  transform: skewX(-12deg);
  border-radius: var(--radius);
}

.slant-label > * {
  transform: skewX(12deg);
}

.slant-label-cyan {
  background: var(--c-cyan);
  color: var(--c-ink);
}

.slant-label-wine {
  background: var(--c-wine);
  color: var(--c-cream);
}

/* ---------- 6. Table & Image ---------- */
.table-wrap {
  overflow-x: auto;
  border: 3px solid var(--c-ink);
  border-radius: var(--radius);
  background: var(--c-cream);
  color: var(--c-primary);
}

.table-wrap table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

.table-wrap th,
.table-wrap td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(10, 31, 68, 0.15);
  font-size: 0.92rem;
}

.table-wrap th {
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 0.06em;
  background: rgba(10, 31, 68, 0.06);
  white-space: nowrap;
}

.table-wrap tr:last-child td {
  border-bottom: none;
}

.table-wrap .num {
  font-family: var(--font-mono);
  text-align: right;
}

.image-frame {
  position: relative;
  overflow: hidden;
  background: var(--c-teal);
  border: 3px solid var(--c-ink);
  border-radius: var(--radius);
}

.image-frame::before {
  content: '';
  display: block;
  padding-top: 56.25%;
}

.image-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.08) contrast(1.04);
}

.image-frame-4-3::before { padding-top: 75%; }
.image-frame-1-1::before { padding-top: 100%; }
.image-frame-3-4::before { padding-top: 133.34%; }

/* ---------- 7. Color Zone Utilities ---------- */
.bg-indigo {
  background: var(--c-indigo);
}

.bg-teal {
  background: var(--c-teal);
}

.bg-wine {
  background: var(--c-wine);
}

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

/* ---------- 8. Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--rail-w);
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: rgba(6, 16, 32, 0.68);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-right: var(--border-w) solid var(--c-primary);
  z-index: 1000;
  transition: background 400ms ease, box-shadow 400ms ease;
}

.site-header[data-scrolled="true"] {
  background: rgba(6, 16, 32, 0.98);
  box-shadow: 6px 0 24px rgba(0, 0, 0, 0.45);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 4px;
  background: repeating-linear-gradient(
    to bottom,
    var(--c-accent) 0,
    var(--c-accent) 6px,
    transparent 6px,
    transparent 16px
  );
  opacity: 0.6;
  z-index: 2;
  pointer-events: none;
}

.header-bar {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 2px solid rgba(0, 212, 255, 0.22);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--c-cream);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  height: 52px;
  padding: 0 6px;
  background: var(--c-accent);
  color: var(--c-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  border-radius: var(--radius);
  box-shadow: 3px 3px 0 rgba(0, 212, 255, 0.5);
  transform: skewX(-6deg);
}

.brand-body {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.site-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 24px;
  padding: 20px 16px;
  overflow-y: auto;
}

.nav-list {
  list-style: none;
}

.nav-item + .nav-item {
  margin-top: 6px;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  padding: 12px 14px;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 1.02rem;
  letter-spacing: 0.06em;
  color: var(--c-cream);
  border: 2px solid transparent;
  border-radius: var(--radius);
  transition: color var(--ease), background var(--ease),
              border-color var(--ease), transform var(--ease);
}

.nav-link::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 12px;
  background: var(--c-gray);
  transform: skewX(-24deg);
  transition: background var(--ease), transform var(--ease);
  flex-shrink: 0;
}

.nav-link:hover {
  color: var(--c-cyan);
  border-color: rgba(0, 212, 255, 0.28);
  transform: translateX(4px);
}

.nav-link:hover::before {
  background: var(--c-cyan);
  transform: skewX(-24deg) scale(1.15);
}

.nav-link[aria-current="page"] {
  color: var(--c-accent);
  background: rgba(0, 212, 255, 0.07);
  border-color: rgba(0, 212, 255, 0.3);
  font-weight: 600;
}

.nav-link[aria-current="page"]::before {
  background: var(--c-accent);
  box-shadow: 0 0 8px rgba(255, 106, 0, 0.6);
}

.nav-download {
  width: 100%;
  margin-top: auto;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 2px solid rgba(0, 212, 255, 0.3);
  border-radius: var(--radius);
  background: rgba(10, 31, 68, 0.6);
  cursor: pointer;
}

.toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--c-cream);
  transition: transform 200ms ease, opacity 200ms ease, background 200ms ease;
}

.nav-toggle:hover .toggle-bar {
  background: var(--c-cyan);
}

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

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

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

/* ---------- 9. Footer ---------- */
.site-footer {
  background: var(--c-ink);
  border-top: 3px solid var(--c-primary);
  margin-top: auto;
}

.footer-accent {
  height: 6px;
  background: linear-gradient(90deg, var(--c-accent) 0%, var(--c-cyan) 60%, var(--c-accent) 100%);
}

.footer-inner {
  max-width: 1240px;
  margin-inline: auto;
  padding: 48px clamp(16px, 3vw, 40px) 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1.2fr 1.4fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(170, 180, 192, 0.2);
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  color: var(--c-cream);
}

.footer-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--c-accent);
  color: var(--c-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.3rem;
  border-radius: var(--radius);
  box-shadow: 3px 3px 0 rgba(0, 212, 255, 0.35);
  transform: skewX(-6deg);
}

.footer-logo-body {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.footer-logo-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

.footer-logo-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.footer-about {
  color: var(--c-gray);
  font-size: 0.92rem;
  line-height: 1.8;
  max-width: 420px;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-cyan);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(0, 212, 255, 0.25);
}

.footer-links,
.footer-contact-list {
  list-style: none;
}

.footer-links li + li,
.footer-contact-list li + li {
  margin-top: 10px;
}

.footer-links a {
  color: var(--c-gray);
  font-size: 0.92rem;
  transition: color 200ms ease, padding-left 200ms ease;
}

.footer-links a:hover {
  color: var(--c-cyan);
  padding-left: 6px;
}

.footer-contact-list li {
  position: relative;
  padding-left: 18px;
  color: var(--c-gray);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-contact-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 2px;
  background: var(--c-accent);
  transform: skewX(-24deg);
}

.footer-trust {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-top: 24px;
  padding: 16px 20px;
  background: rgba(125, 31, 42, 0.15);
  border-left: 6px solid var(--c-wine);
  border-radius: var(--radius);
}

.trust-badge {
  flex-shrink: 0;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cream);
  background: var(--c-wine);
  padding: 4px 10px;
  border-radius: var(--radius);
}

.trust-text {
  color: rgba(250, 247, 242, 0.75);
  font-size: 0.85rem;
  line-height: 1.7;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px 24px;
  padding-top: 24px;
  margin-top: 24px;
  border-top: 1px solid rgba(170, 180, 192, 0.15);
}

.footer-copyright,
.footer-icp {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--c-gray);
}

/* ---------- 10. Reveal ---------- */
[data-reveal] {
  transition: opacity 500ms ease-out, transform 500ms ease-out;
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal][data-revealed="false"] {
  opacity: 0;
  transform: translateY(28px);
}

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

/* ---------- 11. Responsive ---------- */
@media (max-width: 1023px) {
  body {
    margin-left: 0;
  }

  .site-header {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 3px solid var(--c-primary);
  }

  .site-header::before {
    display: none;
  }

  .header-bar {
    height: 64px;
    padding: 10px 16px;
  }

  .brand-mark {
    min-width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }

  .brand-name {
    font-size: 1rem;
  }

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

  .site-nav {
    position: fixed;
    top: 64px;
    left: 0;
    bottom: 0;
    width: min(320px, 86vw);
    background: var(--c-ink);
    border-right: 3px solid var(--c-accent);
    transform: translateX(-100%);
    transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 899;
    padding: 24px 20px;
  }

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

  .site-nav {
    justify-content: flex-start;
  }

  #main-content {
    padding-top: 88px;
  }
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

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

@media (max-width: 600px) {
  .container {
    padding-inline: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .data-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- 12. 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-behavior: auto !important;
  }

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

  .scroll-progress {
    display: none;
  }
}