/* ============================================================
   OG视讯网投 / assets/site.css
   共享外壳样式：reset、变量、中文排版、头部、页脚、
   通用按钮、面包屑、正文容器、网格与基础组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body { margin: 0; }

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

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

h1, h2, h3, h4, h5, p, figure { margin: 0; }

::selection {
  background: rgba(51, 225, 218, .28);
  color: #F4F1EA;
}

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色彩 */
  --ink-900: #060B1A;
  --ink-800: #0C1630;
  --cyan-400: #33E1DA;
  --cyan-200: #9AF4EF;
  --magenta-500: #E23D8E;
  --amber-400: #F2B24C;
  --grey-300: #B9C2CF;
  --paper-100: #F4F1EA;
  --moss-500: #4F7A5A;
  --moss-soft: #8FBF9C;
  --clay-500: #B5623F;
  --text-light: #E8EFF7;
  --text-dark: #10182A;

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-ui: "Inter", "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  /* 尺度 */
  --rail-w: 96px;
  --header-h: 64px;
  --max: 1360px;
  --hairline: 1px solid rgba(185, 194, 207, .18);
  --hairline-cyan: 1px solid rgba(51, 225, 218, .28);
  --radius: 2px;
}

@media (min-width: 1024px) {
  :root { --header-h: 76px; }
}

/* ---------- 3. 基线与中文排版 ---------- */
body {
  font-family: var(--font-ui);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  color: var(--text-light);
  background-color: var(--ink-900);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-wrap: break-word;
  word-break: normal;
}

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

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
  border-radius: var(--radius);
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan-400);
  color: var(--ink-900);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  border-radius: var(--radius);
  transform: translateY(-180%);
  transition: transform .2s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--paper-100);
  outline-offset: 2px;
}

/* ---------- 5. 左侧品牌轨道 ---------- */
.rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 80;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  width: var(--rail-w);
  padding: 24px 0 28px;
  background: var(--ink-900);
  border-right: 1px solid rgba(51, 225, 218, .18);
}

.rail__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.rail__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan-400);
  border: 1px solid rgba(51, 225, 218, .65);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.rail__brand:hover .rail__mark {
  color: var(--ink-900);
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

.rail__word {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 13px;
  letter-spacing: .34em;
  color: var(--grey-300);
}

.rail__rule {
  width: 1px;
  height: 56px;
  background: linear-gradient(180deg, var(--cyan-400), rgba(51, 225, 218, 0));
}

.rail__meta {
  margin-top: auto;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: rgba(185, 194, 207, .7);
}

@media (min-width: 1024px) {
  .rail { display: flex; }
}

/* ---------- 6. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: rgba(6, 11, 26, .55);
  border-bottom: 1px solid rgba(185, 194, 207, .14);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: background-color .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.site-header.is-scrolled {
  background: rgba(6, 11, 26, .92);
  border-bottom-color: rgba(51, 225, 218, .55);
  box-shadow: 0 14px 40px rgba(0, 0, 0, .38);
}

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

.header__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: var(--max);
  min-height: var(--header-h);
  margin: 0 auto;
  padding: 0 20px;
}

@media (min-width: 1024px) {
  .header__inner { padding: 0 32px; }
}

.header__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
}

.header__mark {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan-400);
  border: 1px solid rgba(51, 225, 218, .5);
  padding: 3px 7px;
  border-radius: var(--radius);
}

.header__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--text-light);
}

.header__badge {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--ink-900);
  background: var(--cyan-400);
  padding: 2px 6px;
  border-radius: var(--radius);
}

@media (min-width: 1024px) {
  .header__brand { display: none; }
}

/* 顶部滚动进度条 */
.header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan-400), var(--magenta-500) 70%, var(--amber-400));
  pointer-events: none;
}

/* ---------- 7. 主导航 ---------- */
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

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

.site-nav__item { display: block; }

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 10px 12px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--grey-300);
  transition: color .2s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 1px;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s ease;
}

.site-nav__link:hover { color: var(--text-light); }

.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] {
  color: var(--cyan-400);
  font-weight: 700;
}

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

.site-nav__aside {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 18px;
  padding-left: 18px;
  border-left: 1px solid rgba(185, 194, 207, .18);
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}

.btn--solid {
  background: var(--cyan-400);
  color: var(--ink-900);
}

.btn--solid:hover {
  background: var(--cyan-200);
  transform: translateY(-1px);
}

.btn--ghost {
  border-color: rgba(185, 194, 207, .38);
  color: var(--text-light);
}

.btn--ghost:hover {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
  background: rgba(51, 225, 218, .08);
}

/* ---------- 9. 移动菜单按钮 ---------- */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 6px;
  margin-left: 4px;
  color: var(--text-light);
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 1.5px;
  background: currentColor;
  transition: transform .25s ease, opacity .25s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(5.5px) 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(-5.5px) rotate(-45deg);
}

.nav-toggle__text {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--grey-300);
}

@media (min-width: 1024px) {
  .nav-toggle { display: none; }
}

/* ---------- 10. 移动端底部抽屉 ---------- */
@media (max-width: 1023px) {
  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 95;
    display: block;
    max-height: 82vh;
    overflow-y: auto;
    margin-left: 0;
    padding: 22px 20px calc(24px + env(safe-area-inset-bottom, 0px));
    background: rgba(6, 11, 26, .98);
    border-top: 1px solid rgba(51, 225, 218, .45);
    box-shadow: 0 -28px 70px rgba(0, 0, 0, .6);
    transform: translateY(112%);
    visibility: hidden;
    pointer-events: none;
    transition: transform .34s cubic-bezier(.2, .8, .3, 1), visibility .34s ease;
  }

  .site-nav[data-open] {
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
  }

  .site-nav__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 12px;
  }

  .site-nav__link {
    display: block;
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid rgba(185, 194, 207, .14);
  }

  .site-nav__link::after {
    left: 4px;
    right: 4px;
    bottom: 8px;
  }

  .site-nav__aside {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 20px;
    margin-left: 0;
    padding-left: 0;
    border-left: 0;
  }

  .site-nav__aside .btn { width: 100%; }

  html.nav-open { overflow: hidden; }
}

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--ink-800);
  border-top: 1px solid rgba(51, 225, 218, .28);
  color: var(--text-light);
}

.footer__glow {
  position: absolute;
  top: -160px;
  right: -140px;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(226, 61, 142, .22), rgba(226, 61, 142, 0) 68%);
  pointer-events: none;
}

.footer__inner {
  position: relative;
  display: grid;
  gap: 40px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 52px 20px 40px;
}

@media (min-width: 900px) {
  .footer__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.6fr);
    gap: 56px;
    padding: 72px 32px 52px;
  }
}

.footer__brand { min-width: 0; }

.footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.footer__mark {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ink-900);
  background: var(--cyan-400);
  padding: 6px 10px;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.footer__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--text-light);
}

.footer__tagline {
  margin-top: 18px;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.45;
  letter-spacing: .04em;
  color: var(--cyan-200);
}

.footer__summary {
  margin-top: 12px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--grey-300);
}

.footer__contact {
  display: grid;
  gap: 10px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid rgba(185, 194, 207, .16);
}

.footer__contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.65;
}

.footer__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--amber-400);
  border: 1px solid rgba(242, 178, 76, .42);
  border-radius: var(--radius);
  padding: 1px 6px;
  white-space: nowrap;
}

.footer__value {
  color: var(--grey-300);
  overflow-wrap: anywhere;
}

.footer__columns {
  display: grid;
  gap: 30px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.footer__col { min-width: 0; }

.footer__col-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--cyan-400);
}

.footer__list {
  display: grid;
  gap: 9px;
  margin-top: 16px;
}

.footer__list a {
  display: inline-block;
  font-size: 14.5px;
  color: var(--grey-300);
  padding-left: 0;
  border-left: 1px solid transparent;
  transition: color .2s ease, padding-left .2s ease, border-color .2s ease;
}

.footer__list a:hover {
  color: var(--cyan-200);
  padding-left: 8px;
  border-left-color: var(--magenta-500);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 20px 20px 30px;
  border-top: 1px solid rgba(185, 194, 207, .16);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--grey-300);
}

@media (min-width: 900px) {
  .footer__bottom { padding: 22px 32px 34px; }
}

.footer__copy { color: rgba(185, 194, 207, .9); }

.footer__icp {
  color: rgba(185, 194, 207, .72);
}

.footer__hours {
  color: var(--moss-soft);
}

/* ---------- 12. 容器与页面骨架 ---------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

@media (min-width: 900px) {
  .container { padding: 0 32px; }
}

.page-main { padding-top: var(--header-h); }

.page-main--flush { padding-top: 0; }

/* ---------- 13. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--grey-300);
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__link {
  color: var(--grey-300);
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.breadcrumb__link:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.breadcrumb__sep {
  color: rgba(185, 194, 207, .42);
}

.breadcrumb__current {
  color: var(--cyan-200);
}

/* ---------- 14. 小标签与眉题 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .24em;
  color: var(--cyan-400);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  line-height: 1.5;
  color: var(--cyan-400);
  border: 1px solid currentColor;
  border-radius: var(--radius);
}

.tag--magenta { color: var(--magenta-500); }
.tag--amber { color: var(--amber-400); }
.tag--moss { color: var(--moss-soft); }

/* ---------- 15. 面板卡片 ---------- */
.panel {
  padding: 24px;
  background: linear-gradient(180deg, var(--ink-800), rgba(12, 22, 48, .68));
  border: var(--hairline);
  border-radius: var(--radius);
  transition: border-color .24s ease, transform .24s ease, background-color .24s ease;
}

.panel:hover {
  border-color: rgba(51, 225, 218, .6);
  transform: translateY(-2px);
  background: linear-gradient(180deg, #101B38, rgba(12, 22, 48, .8));
}

/* ---------- 16. 长文排版 ---------- */
.prose {
  max-width: 70ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-light);
}

.prose p { margin-top: 1.1em; }

.prose p:first-child { margin-top: 0; }

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: .03em;
  line-height: 1.3;
  margin-top: 2em;
}

.prose h2 { font-size: clamp(1.4rem, 2.4vw, 1.9rem); }
.prose h3 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); }

.prose ul,
.prose ol {
  margin-top: 1em;
  padding-left: 1.2em;
  list-style: disc;
}

.prose ol { list-style: decimal; }

.prose li { margin-top: .5em; }

.prose a {
  color: var(--cyan-400);
  border-bottom: 1px solid rgba(51, 225, 218, .45);
}

.prose a:hover { border-bottom-color: var(--cyan-400); }

.prose blockquote {
  margin: 1.6em 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--clay-500);
  color: var(--grey-300);
}

.prose code {
  font-family: var(--font-mono);
  font-size: .9em;
  padding: 1px 6px;
  background: rgba(51, 225, 218, .1);
  border-radius: var(--radius);
  color: var(--cyan-200);
}

.prose--paper {
  color: var(--text-dark);
  background: var(--paper-100);
  padding: clamp(24px, 4vw, 56px);
  border-radius: var(--radius);
}

.prose--paper a { color: var(--clay-500); border-bottom-color: rgba(181, 98, 63, .5); }
.prose--paper blockquote { color: #3C4658; border-left-color: var(--moss-500); }
.prose--paper code { background: rgba(16, 24, 42, .08); color: #2A3A56; }

/* ---------- 17. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  border: var(--hairline-cyan);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--ink-800), var(--ink-900));
  overflow: hidden;
}

.media-frame__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--grey-300);
  border-bottom: 1px solid rgba(185, 194, 207, .16);
}

.media-frame__bar::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  margin-right: 22px;
  border-radius: 50%;
  background: var(--magenta-500);
  box-shadow: 14px 0 0 var(--amber-400), 28px 0 0 var(--cyan-400);
}

.media-frame__screen {
  position: relative;
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(135deg, rgba(51, 225, 218, .14), rgba(226, 61, 142, .1)),
    var(--ink-900);
}

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

.media-frame__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--grey-300);
}

.media-frame--tilt { transform: rotate(-2.4deg); }

@media (min-width: 900px) and (prefers-reduced-motion: no-preference) {
  .media-frame--tilt { transition: transform .4s ease; }
  .media-frame--tilt:hover { transform: rotate(0deg); }
}

/* ---------- 18. 滚动显现协议 ---------- */
@media (prefers-reduced-motion: no-preference) {
  html.reveal-ready [data-reveal] {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity .42s ease, transform .42s ease;
    transition-delay: var(--reveal-delay, 0ms);
    will-change: opacity, transform;
  }

  html.reveal-ready [data-reveal].is-visible {
    opacity: 1;
    transform: none;
    will-change: auto;
  }
}

/* ---------- 19. 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .panel:hover,
  .btn--solid:hover,
  .footer__list a:hover { transform: none; }
}

/* ---------- 20. 打印友好 ---------- */
@media print {
  .rail,
  .site-header,
  .site-footer,
  .skip-link { display: none !important; }

  body {
    padding-left: 0;
    background: #fff;
    color: #10182A;
  }

  .page-main { padding-top: 0; }
}