/* ==========================================================
   博鱼综合体育app平台 · 全站共享样式 /assets/site.css
   ========================================================== */

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

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

body {
  min-height: 100vh;
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  color: #F2EFE9;
  background: #0A1110;
  font-variant-numeric: tabular-nums;
}

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

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

ul,
ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

p {
  margin: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: 700;
}

button {
  font: inherit;
  border: none;
  background: none;
}

[hidden] {
  display: none !important;
}

::selection {
  background: #D4A853;
  color: #0D1F1C;
}

:focus-visible {
  outline: 2px solid #D4A853;
  outline-offset: 3px;
}

/* ---------- Tokens ---------- */
:root {
  --bg-primary: #0A1110;
  --bg-deep: #0D1F1C;
  --bg-panel: #13211E;
  --gold: #D4A853;
  --gold-soft: rgba(212, 168, 83, 0.35);
  --gold-faint: rgba(212, 168, 83, 0.12);
  --red-accent: #8E2C24;
  --text-main: #F2EFE9;
  --text-muted: #B8B3A7;
  --border-hair: rgba(212, 168, 83, 0.35);
  --font-display: 'Impact', 'Oswald', 'Arial Narrow', sans-serif;
  --font-title: 'Roboto Condensed', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Roboto Mono', 'Consolas', monospace;
  --header-h: 80px;
  --container-w: 1440px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (max-width: 640px) {
  :root {
    --header-h: 64px;
  }
}

/* ---------- Base Typography ---------- */
.display-title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(48px, 8vw, 96px);
  letter-spacing: 1px;
  text-transform: uppercase;
  line-height: 0.95;
  color: var(--text-main);
}

.title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 2rem;
  letter-spacing: 0.5px;
  color: var(--text-main);
}

/* ---------- Layout Utilities ---------- */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.section {
  padding-block: clamp(64px, 10vw, 120px);
}

.section-head {
  display: grid;
  gap: 12px;
  margin-bottom: 48px;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gold);
}

.section-title {
  font-family: var(--font-title);
  font-style: italic;
  font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 3rem);
  text-transform: uppercase;
  color: var(--text-main);
}

.section-desc {
  color: var(--text-muted);
  max-width: 60ch;
}

.has-header-offset {
  padding-top: calc(var(--header-h) + 28px);
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(32px, 5vw, 80px);
}

@media (max-width: 920px) {
  .split {
    grid-template-columns: 1fr;
  }
}

/* ---------- Decorative Patterns ---------- */
.pitch-bg {
  background-image:
    linear-gradient(rgba(212, 168, 83, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 168, 83, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
}

.divider--slash {
  display: block;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--border-hair) 100%);
  position: relative;
}

.divider--slash::after {
  content: '';
  position: absolute;
  right: 0;
  top: -5px;
  width: 10px;
  height: 10px;
  background: var(--gold);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
}

hr {
  border: none;
  height: 1px;
  background: var(--border-hair);
  margin: 40px 0;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

.btn--gold:hover {
  background: #E2BC6B;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 168, 83, 0.25);
}

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

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

.btn--red {
  border-color: rgba(222, 75, 61, 0.55);
  color: #E05949;
  background: transparent;
}

.btn--red:hover {
  background: rgba(142, 44, 36, 0.35);
  border-color: #E05949;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  padding: 24px 0;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb__item {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.breadcrumb__item a {
  color: var(--text-muted);
  transition: color 0.25s ease;
}

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

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  margin-right: 8px;
  color: var(--text-muted);
}

.breadcrumb__item[aria-current='page'] {
  color: var(--gold);
}

/* ---------- Cards / Tags / KV / Table ---------- */
.card {
  background: var(--bg-panel);
  border: 1px solid var(--border-hair);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.card__title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-main);
  margin-bottom: 8px;
}

.card__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 1px;
  color: var(--gold);
}

.card--file {
  position: relative;
  border-left: 3px solid var(--gold);
  padding-top: 32px;
}

.card--file::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  width: 26px;
  height: 26px;
  background: var(--gold);
  clip-path: polygon(0 0, 100% 0, 0 100%);
}

.card--file::after {
  content: attr(data-file);
  position: absolute;
  top: 12px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 1px;
  color: var(--gold);
  opacity: 0.85;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border: 1px solid var(--border-hair);
  color: var(--text-muted);
  background: transparent;
}

.tag--gold {
  color: var(--gold);
  border-color: var(--gold);
}

.tag--red {
  color: #E05949;
  border-color: rgba(222, 75, 61, 0.55);
}

.kv {
  border-top: 1px solid var(--border-hair);
}

.kv__row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(212, 168, 83, 0.12);
}

@media (max-width: 640px) {
  .kv__row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

.kv__key {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gold);
}

.kv__value {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-main);
}

.stat-num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--gold);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-body);
  font-size: 0.9rem;
}

.data-table th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gold);
  padding: 12px;
  border-bottom: 1px solid var(--border-hair);
  text-align: left;
}

.data-table td {
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border-bottom: 1px solid rgba(212, 168, 83, 0.12);
}

.data-table tbody tr {
  transition: background 0.25s ease;
}

.data-table tbody tr:hover {
  background: rgba(212, 168, 83, 0.05);
}

/* ---------- Frame ---------- */
.frame {
  position: relative;
  border: 1px solid var(--border-hair);
  background: linear-gradient(160deg, rgba(13, 31, 28, 0.92), rgba(10, 17, 16, 0.6));
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  padding: clamp(24px, 4vw, 48px);
}

.frame::before,
.frame::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  pointer-events: none;
}

.frame::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--gold);
  border-left: 2px solid var(--gold);
}

.frame::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid var(--gold);
  border-right: 2px solid var(--gold);
}

/* ---------- Tabs ---------- */
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid var(--border-hair);
}

.tabs__tab {
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  padding: 10px 22px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  cursor: pointer;
  position: relative;
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.tabs__tab:hover {
  color: var(--gold);
}

.tabs__tab[aria-selected='true'] {
  color: var(--gold);
  border-color: var(--border-hair);
  background: var(--bg-panel);
}

.tabs__tab[aria-selected='true']::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--gold);
}

.tabs__panel {
  padding: 24px;
  background: var(--bg-panel);
  border: 1px solid var(--border-hair);
  border-top: none;
  animation: tabIn 0.35s var(--ease);
}

@keyframes tabIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Header ---------- */
.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 200;
  background: var(--gold);
  color: var(--bg-deep);
  padding: 10px 20px;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.3s ease;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(10, 17, 16, 0.85) 0%, rgba(10, 17, 16, 0.4) 60%, transparent 100%);
  border-bottom: 1px solid transparent;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.site-header.is-scrolled {
  background: var(--bg-deep);
  border-bottom-color: var(--border-hair);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.site-header__inner {
  max-width: var(--container-w);
  margin-inline: auto;
  height: var(--header-h);
  padding: 0 clamp(16px, 4vw, 48px);
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.site-header__brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: var(--bg-deep);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 1.4rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-header__logo {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 1px;
  color: var(--text-main);
  white-space: nowrap;
}

.site-header__logo-note {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 2px;
  color: var(--gold);
}

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

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-header__nav-link {
  display: block;
  padding: 10px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--text-main);
  position: relative;
  transition: color 0.25s ease;
}

.site-header__nav-link:hover {
  color: var(--gold);
}

.site-header__nav-link::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

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

.site-header__nav-link[aria-current='page'] {
  color: var(--gold);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-header__cta {
  padding: 10px 20px;
  font-size: 0.8rem;
}

.site-header__toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border-hair);
  cursor: pointer;
  position: relative;
  z-index: 110;
}

.site-header__toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--gold);
  margin: 3px auto;
  transition: transform 0.3s var(--ease), opacity 0.3s ease;
}

.site-header__toggle[aria-expanded='true'] .site-header__toggle-bar:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

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

.site-header__toggle[aria-expanded='true'] .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* ---------- Mobile Nav ---------- */
@media (max-width: 920px) {
  .site-header__toggle {
    display: block;
  }

  .site-header__nav {
    margin-left: 0;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-deep);
    border-bottom: 1px solid var(--border-hair);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.45s var(--ease), opacity 0.3s ease, visibility 0.3s;
  }

  .site-header__nav[data-open] {
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 16px clamp(16px, 4vw, 48px) 32px;
    gap: 0;
  }

  .site-header__nav-link {
    width: 100%;
    padding: 14px 8px;
    font-size: 1rem;
    border-bottom: 1px solid rgba(212, 168, 83, 0.12);
  }

  .site-header__nav-link::after {
    display: none;
  }

  .site-header__nav-link[aria-current='page'] {
    color: var(--gold);
    border-bottom-color: var(--gold);
  }
}

@media (max-width: 640px) {
  .site-header__brand-mark {
    width: 36px;
    height: 36px;
    font-size: 1.2rem;
  }

  .site-header__logo {
    font-size: 1.05rem;
  }

  .site-header__cta {
    padding: 8px 14px;
    font-size: 0.72rem;
  }
}

@media (max-width: 420px) {
  .site-header__logo-note {
    display: none;
  }

  .site-header__cta {
    display: none;
  }
}

/* ---------- Footer ---------- */
.site-footer {
  background: linear-gradient(180deg, var(--bg-deep) 0%, #08110F 100%);
  border-top: 1px solid var(--border-hair);
  position: relative;
}

.site-footer__pitch-line {
  height: 4px;
  background: repeating-linear-gradient(90deg, rgba(212, 168, 83, 0.7) 0px, rgba(212, 168, 83, 0.7) 48px, transparent 48px, transparent 80px);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.1fr 1.4fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  padding-block: clamp(48px, 7vw, 80px) clamp(32px, 4vw, 48px);
}

.site-footer__brand-logo {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 1.8rem;
  letter-spacing: 1px;
  color: var(--text-main);
  text-decoration: none;
}

.site-footer__brand-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 2px;
  color: var(--gold);
  margin-top: 6px;
}

.site-footer__trust {
  margin-top: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.9;
  max-width: 40ch;
  border-left: 2px solid var(--gold-soft);
  padding-left: 16px;
}

.site-footer__columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.site-footer__col-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(212, 168, 83, 0.25);
}

.site-footer__col-list {
  display: grid;
  gap: 10px;
}

.site-footer__link {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.25s ease, padding-left 0.25s ease;
  position: relative;
}

.site-footer__link:hover {
  color: var(--gold);
  padding-left: 8px;
}

.site-footer__contact {
  border-left: 1px solid rgba(212, 168, 83, 0.25);
  padding-left: 24px;
}

.site-footer__contact-title {
  border-bottom: none;
}

.site-footer__contact-item {
  font-size: 0.875rem;
  color: var(--text-main);
  line-height: 1.9;
}

.site-footer__contact-label {
  display: inline-block;
  width: 3.2em;
  font-family: var(--font-mono);
  font-size: 0.72em;
  letter-spacing: 1px;
  color: var(--gold);
}

.site-footer__contact-note {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed rgba(212, 168, 83, 0.2);
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.site-footer__meta {
  border-top: 1px solid rgba(212, 168, 83, 0.2);
}

.site-footer__meta-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-block: 18px;
}

.site-footer__copyright {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.site-footer__icp {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 1px;
  color: var(--text-muted);
}

@media (max-width: 1000px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
  }

  .site-footer__contact {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid rgba(212, 168, 83, 0.25);
    padding-top: 28px;
  }
}

@media (max-width: 600px) {
  .site-footer__columns {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

/* ---------- Reveal / Back to Top ---------- */
.js-reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.js-reveal-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  background: var(--bg-deep);
  border: 1px solid var(--gold);
  color: var(--gold);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), background 0.3s var(--ease), visibility 0.3s;
  z-index: 90;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--gold);
  color: var(--bg-deep);
}

.back-to-top__icon {
  display: block;
  width: 0;
  height: 0;
  margin: 15px auto 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 8px solid currentColor;
}

/* ---------- Accessibility ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

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

  .site-header__nav {
    transition: none;
  }
}