/* =========================================================
   OG视讯网投 · 共享样式 /assets/site.css
   深靛基底 · 蓝图网格 · 信号橙锚点 · 电光青状态
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
input, textarea, select { font: inherit; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-950: #0A0F2C;
  --ink-850: #141A3D;
  --ink-750: #1F2751;
  --line-500: #2E3768;
  --paper-50: #F7F5F0;
  --paper-200: #E4E1DA;
  --signal-500: #FF5A1F;
  --ember-400: #FF8A4C;
  --cyan-400: #22D3EE;
  --cyan-700: #0E7490;
  --mint-400: #34D399;
  --amber-400: #FBBF24;
  --text-300: #9AA3C7;
  --text-900: #F7F5F0;

  --grid-line: rgba(46, 55, 104, 0.28);
  --shadow-panel: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-capsule: 0 10px 32px rgba(0, 0, 0, 0.42);

  --radius-pill: 999px;
  --radius-panel: 14px;
  --radius-soft: 10px;

  --header-h: 84px;
  --axis-w: 88px;
  --gutter: 64px;
  --ease: cubic-bezier(.2, .7, .2, 1);

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-narrow: "Archivo Narrow", "Oswald", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--ink-950);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
  color: var(--text-900);
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 17px;
  line-height: 1.9;
  letter-spacing: .01em;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5 { font-weight: 300; line-height: 1.15; letter-spacing: -.01em; }
p { max-width: 68ch; }
::selection { background: rgba(255, 90, 31, .35); color: #fff; }

:focus-visible {
  outline: 2px solid var(--signal-500);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 4. 布局容器 ---------- */
.og-container {
  width: 100%;
  max-width: 1320px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.og-page { padding-top: calc(var(--header-h) + 48px); }

.og-layout {
  display: grid;
  grid-template-columns: var(--axis-w) minmax(0, 1fr);
}
.og-axis {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  align-self: start;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  min-height: 60vh;
  padding-block: 32px;
  border-right: 1px solid var(--line-500);
}
.og-axis__item {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--text-300);
  padding: 6px 2px;
  transition: color .18s var(--ease);
}
.og-axis__item:hover { color: var(--cyan-400); }
.og-axis__item[aria-current="true"] { color: var(--signal-500); }
.og-content { min-width: 0; padding-left: 40px; }

.og-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}
.og-span-4 { grid-column: span 4; }
.og-span-6 { grid-column: span 6; }
.og-span-8 { grid-column: span 8; }
.og-span-12 { grid-column: span 12; }

.og-stack > * + * { margin-top: 20px; }

/* ---------- 5. 标题体系 ---------- */
.og-display {
  font-size: clamp(3rem, 9vw, 7.5rem);
  font-weight: 200;
  line-height: 1.05;
  letter-spacing: -.02em;
}
.og-title {
  font-size: clamp(1.4rem, 2vw, 1.75rem);
  font-weight: 400;
  line-height: 1.35;
}
.og-eyebrow {
  font-family: var(--font-narrow);
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan-400);
  line-height: 1.6;
}
.og-lead {
  max-width: 68ch;
  color: var(--text-300);
  font-size: 17px;
  line-height: 1.9;
}
.og-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-300);
  font-variant-numeric: tabular-nums;
}

.og-section {
  padding-block: 96px;
  border-top: 1px solid var(--line-500);
}
.og-section:first-of-type { border-top: 0; }
.og-section__head {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.og-section__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--signal-500);
  font-variant-numeric: tabular-nums;
}
.og-section__title {
  font-size: clamp(1.75rem, 3.4vw, 2.6rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -.01em;
}

.og-divider {
  height: 1px;
  border: 0;
  background: var(--line-500);
  margin: 0;
}

/* ---------- 6. 面板与标签 ---------- */
.og-panel {
  background: var(--ink-850);
  border: 1px solid var(--line-500);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-panel);
  padding: 28px;
}
.og-panel--paper {
  background: var(--paper-50);
  border-color: var(--paper-200);
  color: #10152F;
}
.og-panel--paper .og-lead,
.og-panel--paper .og-meta { color: #4A5070; }
.og-panel--paper .og-eyebrow { color: var(--cyan-700); }

.og-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 11px;
  border-radius: var(--radius-pill);
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}
.og-tag--signal { color: var(--signal-500); background: rgba(255, 90, 31, .10); }
.og-tag--cyan   { color: var(--cyan-400);   background: rgba(34, 211, 238, .10); }
.og-tag--mint   { color: var(--mint-400);   background: rgba(52, 211, 153, .10); }
.og-tag--amber  { color: var(--amber-400);  background: rgba(251, 191, 36, .10); }
.og-tag--muted  { color: var(--text-300);   background: rgba(154, 163, 199, .08); }

/* ---------- 7. 图像容器（页面阶段放图） ---------- */
.og-img {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line-500);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-panel);
  background:
    radial-gradient(120% 80% at 18% 8%, rgba(34, 211, 238, .18), transparent 62%),
    radial-gradient(90% 70% at 86% 92%, rgba(255, 90, 31, .16), transparent 64%),
    linear-gradient(160deg, var(--ink-850) 0%, var(--ink-950) 100%);
}
.og-img > img,
.og-img > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.og-img::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .42;
  background-image:
    linear-gradient(to right, rgba(46, 55, 104, .55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46, 55, 104, .55) 1px, transparent 1px);
  background-size: 48px 48px;
}
.og-img--plain::after { display: none; }
.og-img--wide { aspect-ratio: 21 / 9; }
.og-img--tall { aspect-ratio: 3 / 4; }
.og-img--square { aspect-ratio: 1 / 1; }
.og-img--thumb { aspect-ratio: 4 / 3; border-radius: var(--radius-soft); }
.og-img__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-300);
}

/* ---------- 8. 按钮 ---------- */
.og-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.og-btn--primary {
  background: var(--signal-500);
  color: #fff;
  border-color: var(--signal-500);
}
.og-btn--primary:hover { background: var(--ember-400); border-color: var(--ember-400); }
.og-btn--quiet {
  border-color: var(--line-500);
  color: var(--text-300);
  background: rgba(31, 39, 81, .45);
}
.og-btn--quiet:hover { color: var(--cyan-400); border-color: var(--cyan-400); }
.og-btn--copy { height: 34px; padding: 0 14px; font-size: 13px; margin-top: 4px; }

/* ---------- 9. 面包屑 ---------- */
.og-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-300);
}
.og-breadcrumb a { transition: color .18s var(--ease); }
.og-breadcrumb a:hover { color: var(--cyan-400); }
.og-breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-500);
}

/* ---------- 10. 跳转链接 ---------- */
.og-skip {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  transform: translateY(-180%);
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: var(--signal-500);
  color: #fff;
  font-size: 14px;
  text-decoration: none;
  transition: transform .2s var(--ease);
}
.og-skip:focus { transform: translateY(0); }

/* ---------- 11. 页头：悬浮胶囊 ---------- */
.og-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan-400), var(--signal-500));
  z-index: 120;
  pointer-events: none;
}

.og-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: flex;
  justify-content: center;
  padding: 14px var(--gutter) 0;
  transition: padding .3s var(--ease);
}
.og-header__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: 1320px;
  padding: 9px 12px 9px 22px;
  border: 1px solid var(--line-500);
  border-radius: var(--radius-pill);
  background: rgba(31, 39, 81, .72);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  box-shadow: var(--shadow-capsule);
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}
.og-header[data-scrolled="true"] { padding-top: 8px; }
.og-header[data-scrolled="true"] .og-header__inner {
  background: rgba(20, 26, 61, .95);
  border-color: rgba(46, 55, 104, .9);
}
.og-header[data-scrolled="true"] .og-nav__link { height: 34px; padding: 0 12px; font-size: 14px; }
.og-header[data-scrolled="true"] .og-brand__sub { opacity: 0; }

.og-brand {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 1px;
  min-width: 0;
  padding-right: 4px;
}
.og-brand__mark {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: .04em;
  line-height: 1.2;
  color: var(--text-900);
  white-space: nowrap;
}
.og-brand__sub {
  font-family: var(--font-narrow);
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: .08em;
  line-height: 1.2;
  color: var(--text-300);
  white-space: nowrap;
  transition: opacity .25s var(--ease);
}

.og-header__current {
  display: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan-400);
  white-space: nowrap;
}
.og-header[data-scrolled="true"] .og-header__current { display: inline-flex; }

.og-nav { display: flex; margin-inline: auto; }
.og-nav__list { display: flex; align-items: center; gap: 2px; }
.og-nav__item { display: flex; }
.og-nav__link {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  color: var(--text-300);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}
.og-nav__link:hover { color: var(--text-900); background: rgba(34, 211, 238, .10); }
.og-nav__link[aria-current="page"] {
  color: var(--signal-500);
  background: rgba(255, 90, 31, .12);
  border-color: rgba(255, 90, 31, .45);
}

.og-header__actions { display: flex; align-items: center; gap: 10px; }

.og-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line-500);
  border-radius: var(--radius-pill);
  color: var(--text-300);
  background: rgba(31, 39, 81, .5);
}
.og-nav-toggle:hover { color: var(--cyan-400); border-color: var(--cyan-400); }
.og-nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 4px; width: 16px; }
.og-nav-toggle__bar {
  display: block;
  height: 1.5px;
  width: 100%;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.og-nav-toggle[aria-expanded="true"] .og-nav-toggle__bar:first-child { transform: translateY(2.75px) rotate(45deg); }
.og-nav-toggle[aria-expanded="true"] .og-nav-toggle__bar:last-child { transform: translateY(-2.75px) rotate(-45deg); }
.og-nav-toggle__label { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; }

/* ---------- 12. 页脚 ---------- */
.og-footer {
  margin-top: 96px;
  border-top: 1px solid var(--line-500);
  background: linear-gradient(180deg, rgba(20, 26, 61, .70) 0%, rgba(10, 15, 44, .96) 100%);
}
.og-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1.5fr;
  gap: 40px 32px;
  padding-block: 64px 40px;
}
.og-footer__brand { display: flex; flex-direction: column; gap: 6px; }
.og-footer__logo {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--text-900);
}
.og-footer__sub {
  font-family: var(--font-narrow);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--text-300);
}
.og-footer__signature {
  margin-top: 14px;
  font-size: 15px;
  color: var(--text-900);
  letter-spacing: .02em;
}
.og-footer__coord {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--line-500);
}
.og-footer__title {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--text-900);
  margin-bottom: 16px;
}
.og-footer__list { display: flex; flex-direction: column; gap: 10px; }
.og-footer__link {
  font-size: 15px;
  color: var(--text-300);
  transition: color .18s var(--ease);
}
.og-footer__link:hover { color: var(--cyan-400); }
.og-footer__contact-body { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.og-footer__line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 15px;
  color: var(--text-300);
  max-width: none;
}
.og-footer__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--line-500);
  min-width: 30px;
  padding-top: 3px;
}
.og-footer__note {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-300);
  max-width: 40ch;
}
.og-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 20px 28px;
  border-top: 1px solid var(--line-500);
}
.og-footer__legal-item {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-300);
  font-variant-numeric: tabular-nums;
  max-width: none;
}

/* ---------- 13. 显现动效 ---------- */
.og-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .42s var(--ease), transform .42s var(--ease);
}
.og-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1180px) {
  :root { --gutter: 40px; }
  .og-footer__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .og-footer__brand,
  .og-footer__contact { grid-column: 1 / -1; }
  .og-footer__contact-body { flex-direction: row; flex-wrap: wrap; gap: 20px 40px; }
}

@media (max-width: 1024px) {
  .og-layout { grid-template-columns: minmax(0, 1fr); }
  .og-axis {
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 20px;
    min-height: 0;
    padding-block: 14px;
    padding-inline: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line-500);
    overflow-x: auto;
  }
  .og-axis__item { writing-mode: horizontal-tb; padding: 4px 0; }
  .og-content { padding-left: 0; }
  .og-section { padding-block: 72px; }
}

@media (max-width: 860px) {
  :root { --gutter: 20px; --header-h: 72px; }
  .og-header { padding: 10px 16px 0; }
  .og-header__inner {
    gap: 10px;
    padding: 8px 10px 8px 16px;
    background: rgba(20, 26, 61, .96);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
  .og-header__current { display: none !important; }
  .og-btn--quiet { display: none; }
  .og-nav-toggle { display: inline-flex; }

  .og-nav {
    position: fixed;
    left: 16px;
    right: 16px;
    bottom: 16px;
    z-index: 95;
    display: block;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding: 18px;
    border: 1px solid var(--line-500);
    border-radius: 20px;
    background: rgba(20, 26, 61, .98);
    box-shadow: 0 18px 48px rgba(0, 0, 0, .55);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(16px);
    transition: opacity .24s var(--ease), transform .24s var(--ease), visibility .24s var(--ease);
  }
  .og-nav[data-open] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }
  .og-nav__list { counter-reset: og-nav; display: grid; gap: 6px; }
  .og-nav__link {
    display: flex;
    justify-content: flex-start;
    gap: 14px;
    height: 52px;
    padding: 0 16px;
    border-radius: 12px;
    font-size: 16px;
  }
  .og-nav__link::before {
    counter-increment: og-nav;
    content: "0" counter(og-nav);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .06em;
    color: var(--line-500);
  }
  .og-nav__link[aria-current="page"]::before { color: var(--signal-500); }

  .og-grid { grid-template-columns: minmax(0, 1fr); }
  .og-span-4, .og-span-6, .og-span-8 { grid-column: span 1; }
  .og-section { padding-block: 56px; }
  .og-section__head { margin-bottom: 28px; }
  .og-panel { padding: 20px; }
  .og-footer { margin-top: 56px; }
  .og-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); padding-block: 48px 32px; }
  .og-footer__contact-body { flex-direction: column; gap: 10px; }
  .og-footer__legal { justify-content: flex-start; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .og-brand__mark { font-size: 15px; }
  .og-brand__sub { display: none; }
  .og-btn--primary { height: 36px; padding: 0 14px; font-size: 13px; }
  .og-footer__grid { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 15. 降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 120ms !important;
    transition-delay: 0ms !important;
  }
  .og-js [data-reveal] { opacity: 1; transform: none; transition-duration: 120ms !important; }
  .og-nav { transition-duration: 120ms !important; }
}