/* ==========================================================
   MANBETX 万博体育 — 全站共享样式 /assets/site.css
   视觉概念：战术数据板 / Technical Blueprint
   ========================================================== */

/* ---------- 1. Reset & Variables ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #0B0E14;
  --color-bg-deep: #0F1D36;
  --color-card: #1B3A6B;
  --color-accent: #F5C518;
  --color-status: #39FF88;
  --color-muted: #A0B0C8;
  --color-text: #F0F4F8;
  --gradient-accent: linear-gradient(135deg, #F5C518 0%, #39FF88 100%);

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

  --container-max: 1200px;
  --header-z: 1000;
  --to-top-z: 950;
  --skip-z: 2000;

  --radius: 4px;
  --transition-fast: 0.2s ease;
}

/* ---------- 2. Base ---------- */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(rgba(160, 176, 200, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 176, 200, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  margin: 0 0 0.5em;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

p {
  margin: 0 0 1em;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

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

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

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

button {
  font: inherit;
  cursor: pointer;
}

/* ---------- 3. Container ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.375rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform 0.15s ease;
}

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

.btn--gold:hover {
  background: var(--color-status);
  color: var(--color-bg);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(160, 176, 200, 0.4);
  color: var(--color-muted);
}

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

/* ---------- 5. Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: var(--skip-z);
  padding: 0.625rem 1.25rem;
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 0 0 var(--radius) var(--radius);
  text-decoration: none;
  transition: top 0.2s ease;
}

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

/* ---------- 6. Site Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--header-z);
  background: var(--color-bg-deep);
  border-bottom: 1px solid rgba(245, 197, 24, 0.25);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  z-index: 2;
}

.site-header::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(160, 176, 200, 0.12);
}

.site-header__main {
  position: relative;
  background:
    linear-gradient(rgba(160, 176, 200, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 176, 200, 0.05) 1px, transparent 1px),
    var(--color-bg-deep);
  background-size: 24px 24px, 24px 24px, auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 68px;
}

/* Brand */
.site-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-shrink: 0;
  text-decoration: none;
}

.site-brand__name {
  font-family: var(--font-heading);
  font-size: 1.875rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.site-brand__mark {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-accent);
}

.site-brand__mark::before {
  content: '[';
  color: var(--color-status);
  margin-right: 0.25em;
}

.site-brand__mark::after {
  content: ']';
  color: var(--color-status);
  margin-left: 0.25em;
}

/* Main Nav */
.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.125rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: block;
  position: relative;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--color-muted);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 0.875rem;
  right: 0.875rem;
  bottom: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s ease;
}

.site-nav__link:hover {
  color: var(--color-text);
  background: rgba(245, 197, 24, 0.06);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
}

/* Header Status */
.site-header__status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
  margin-left: 0.25rem;
}

.status-live {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.3125rem 0.625rem;
  border: 1px solid rgba(57, 255, 136, 0.35);
  border-radius: 999px;
  background: rgba(57, 255, 136, 0.07);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-status);
}

.status-live__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-status);
  animation: live-pulse 1.6s ease-in-out infinite;
}

.status-live__meta {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  padding: 0.1875rem 0.375rem;
  border: 1px solid rgba(245, 197, 24, 0.35);
  border-radius: 2px;
  background: rgba(245, 197, 24, 0.06);
}

@keyframes live-pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(57, 255, 136, 0.45);
  }
  50% {
    opacity: 0.55;
    box-shadow: 0 0 0 4px rgba(57, 255, 136, 0);
  }
}

/* Nav Toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: transparent;
  border: 1px solid rgba(160, 176, 200, 0.3);
  border-radius: var(--radius);
  color: var(--color-text);
  line-height: 1;
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 20px;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.nav-toggle__text {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.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);
}

/* Breadcrumb */
.breadcrumb {
  background: rgba(11, 14, 20, 0.72);
  border-top: 1px solid rgba(160, 176, 200, 0.12);
}

.breadcrumb__inner {
  display: flex;
  align-items: center;
  padding-block: 0.375rem;
}

.breadcrumb__sync {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(160, 176, 200, 0.55);
  margin-right: 1rem;
  padding-right: 1rem;
  border-right: 1px solid rgba(160, 176, 200, 0.18);
  white-space: nowrap;
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.breadcrumb__item a {
  color: var(--color-muted);
  text-decoration: none;
}

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

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  margin: 0 0.625rem;
  color: var(--color-accent);
  font-family: var(--font-mono);
  opacity: 0.7;
}

.breadcrumb__item[aria-current="page"] {
  color: var(--color-accent);
  font-weight: 600;
}

/* Scroll Progress */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  z-index: 3;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* ---------- 7. Site Footer ---------- */
.site-footer {
  position: relative;
  margin-top: 3rem;
  background:
    linear-gradient(rgba(160, 176, 200, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 176, 200, 0.04) 1px, transparent 1px),
    var(--color-bg-deep);
  background-size: 24px 24px, 24px 24px, auto;
  border-top: 1px solid rgba(245, 197, 24, 0.25);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.6fr;
  gap: 2.5rem;
  padding-block: 3.5rem 2rem;
}

.site-footer__brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.75rem;
  text-decoration: none;
}

.site-footer__brand-name {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
}

.site-footer__brand-mark {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-accent);
}

.site-footer__brand-mark::before {
  content: '[';
  color: var(--color-status);
  margin-right: 0.25em;
}

.site-footer__brand-mark::after {
  content: ']';
  color: var(--color-status);
  margin-left: 0.25em;
}

.site-footer__desc {
  margin: 1rem 0 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-muted);
}

.site-footer__tags {
  margin: 0;
}

.site-footer__tag {
  display: inline-block;
  margin: 0 0.375rem 0.375rem 0;
  padding: 0.25rem 0.625rem;
  border: 1px solid rgba(245, 197, 24, 0.28);
  border-radius: 999px;
  background: rgba(245, 197, 24, 0.05);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  color: var(--color-muted);
}

.site-footer__heading {
  margin-bottom: 1rem;
  font-size: 0.9375rem;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__list li {
  margin-bottom: 0.625rem;
}

.site-footer__list a {
  color: var(--color-muted);
  text-decoration: none;
  padding: 0.25rem 0;
  transition: color var(--transition-fast), padding-left 0.2s ease;
}

.site-footer__list a:hover {
  color: var(--color-accent);
  padding-left: 0.375rem;
}

.site-footer__contact {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__contact-item {
  display: flex;
  gap: 0.625rem;
  align-items: flex-start;
  padding: 0.5rem 0;
  border-bottom: 1px dashed rgba(160, 176, 200, 0.15);
}

.site-footer__contact-label {
  flex-shrink: 0;
  min-width: 2.5em;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.site-footer__contact-value {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-muted);
  word-break: break-all;
}

.site-footer__bottom {
  border-top: 1px solid rgba(160, 176, 200, 0.15);
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1.125rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.site-footer__copyright,
.site-footer__icp,
.site-footer__notice {
  margin: 0;
}

.site-footer__bottom-inner a {
  color: var(--color-muted);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.site-footer__bottom-inner a:hover {
  color: var(--color-accent);
}

/* ---------- 8. To Top ---------- */
.to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: var(--to-top-z);
  min-width: 3rem;
  height: 3rem;
  padding-inline: 0.625rem;
  border-radius: 6px;
  border: 2px solid var(--color-accent);
  background: rgba(11, 14, 20, 0.92);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s, background 0.2s ease, color 0.2s ease;
}

.to-top--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* ---------- 9. Section Components ---------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.section-label::before {
  content: '//';
  color: var(--color-accent);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.15;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

/* ---------- 10. Media Frame ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--color-card);
  border: 1px solid rgba(160, 176, 200, 0.22);
  border-radius: var(--radius);
}

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

.media-frame--portrait::before {
  padding-top: 133.33%;
}

.media-frame--wide::before {
  padding-top: 41.67%;
}

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

.media-frame__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.5rem;
  background:
    linear-gradient(rgba(160, 176, 200, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 176, 200, 0.1) 1px, transparent 1px),
    rgba(15, 29, 54, 0.6);
  background-size: 20px 20px, 20px 20px, auto;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.media-frame__placeholder::before {
  content: 'IMG SLOT';
  display: block;
}

.media-frame__placeholder::after {
  content: '1200 × 675';
  display: block;
  font-size: 0.625rem;
  opacity: 0.6;
}

/* ---------- 11. Focus & Accessibility ---------- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---------- 12. Responsive ---------- */
@media (max-width: 960px) {
  .site-header__inner {
    min-height: 60px;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    background: var(--color-bg-deep);
    border-top: 1px solid rgba(245, 197, 24, 0.3);
    border-bottom: 1px solid rgba(245, 197, 24, 0.2);
    transition: max-height 0.3s ease, opacity 0.25s ease;
    margin-left: 0;
  }

  .site-header[data-open] .site-nav {
    max-height: 70vh;
    opacity: 1;
    overflow-y: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1rem 1rem;
  }

  .site-nav__item + .site-nav__item {
    border-top: 1px dashed rgba(160, 176, 200, 0.16);
  }

  .site-nav__link {
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border-left: 2px solid transparent;
  }

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

  .site-nav__link:hover {
    background: rgba(245, 197, 24, 0.06);
    border-left-color: var(--color-accent);
  }

  .site-nav__link[aria-current="page"] {
    color: var(--color-accent);
    border-left-color: var(--color-accent);
  }

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

  .site-header__status {
    margin-left: auto;
  }

  .breadcrumb__sync {
    display: none;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding-block: 2.5rem 1.5rem;
  }

  .site-footer__col--brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 600px) {
  .site-brand__name {
    font-size: 1.5rem;
  }

  .site-brand__mark {
    font-size: 0.6875rem;
  }

  .status-live__meta {
    display: none;
  }

  .nav-toggle__text {
    display: none;
  }

  .nav-toggle {
    gap: 0;
    padding: 0.625rem 0.75rem;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    padding-block: 2rem 1rem;
  }

  .site-footer__col--brand {
    grid-column: auto;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: 0.375rem;
    padding-block: 1rem;
  }

  .breadcrumb__item {
    font-size: 0.75rem;
  }

  .breadcrumb__item + .breadcrumb__item::before {
    margin: 0 0.375rem;
  }
}

/* ---------- 13. 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;
  }

  .status-live__dot {
    animation: none;
  }

  .to-top {
    transition: none;
  }
}