/* ==========================================================================
   22bet看台 · 全站共享样式表 /assets/site.css
   深墨绿夜色基底 + 荧光青强调 + 琥珀金数字 + 信号红状态
   ========================================================================== */

:root {
  --ink-950: #05130F;
  --ink-900: #0A211C;
  --ink-800: #0F2E27;
  --ink-700: #1B4A3E;
  --cyan-400: #23F0C8;
  --cyan-200: #9BFFEC;
  --amber-400: #FFC24B;
  --amber-900: #4A3413;
  --signal-500: #FF4D5E;
  --neutral-100: #EAF6F2;
  --neutral-400: #93AEA7;

  --shadow-hard: 8px 8px 0 0 rgba(3, 12, 9, 0.85);
  --shadow-soft: 4px 4px 0 0 rgba(3, 12, 9, 0.7);

  --font-heading: "Archivo Black", "Saira Condensed", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --shell: 1360px;
  --edge: 24px;
  --radius: 0px;
}

/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background-color: var(--ink-950);
  color: var(--neutral-100);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  overflow-x: hidden;
}

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

ul, ol { margin: 0; padding: 0; }

button { font: inherit; }

hr { border: 0; border-top: 1px solid var(--ink-700); margin: 32px 0; }

:focus-visible {
  outline: 3px solid var(--cyan-200);
  outline-offset: 3px;
}

#main-content { scroll-margin-top: 96px; }

/* --------------------------------------------------------------------------
   排版
   -------------------------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 16px;
  font-family: var(--font-heading);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.12;
  color: var(--neutral-100);
}

h1 { font-size: clamp(34px, 6vw, 64px); }
h2 { font-size: clamp(26px, 3.6vw, 36px); }
h3 { font-size: clamp(19px, 2.2vw, 24px); }
h4 { font-size: 18px; letter-spacing: 0; }

p { margin: 0 0 16px; }

a { color: var(--cyan-400); text-decoration: none; }
a:hover { color: var(--cyan-200); }

strong { color: var(--cyan-200); font-weight: 700; }

.eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.lead {
  max-width: 64ch;
  font-size: clamp(17px, 2vw, 19px);
  line-height: 1.7;
  color: var(--neutral-400);
}

.prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--neutral-100);
}
.prose p { margin: 0 0 1.15em; }
.prose ul, .prose ol { margin: 0 0 1.15em; padding-left: 1.4em; }
.prose li { margin: 0 0 0.5em; }
.prose h2 { margin-top: 1.8em; }
.prose h3 { margin-top: 1.5em; }
.prose a { border-bottom: 1px solid var(--ink-700); }
.prose a:hover { border-bottom-color: var(--cyan-400); }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.stat {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--amber-400);
}

/* --------------------------------------------------------------------------
   布局
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-left: var(--edge);
  padding-right: var(--edge);
}

.section { padding: 64px 0; }
.section--tight { padding: 40px 0; }
.section--alt { background-color: var(--ink-900); }
.section--deep { background-color: var(--ink-800); }
.section--edge {
  border-top: 4px solid var(--ink-700);
  border-bottom: 4px solid var(--ink-700);
}
.section--tactical {
  background-color: var(--ink-900);
  background-image:
    linear-gradient(rgba(27, 74, 62, 0.45) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 74, 62, 0.45) 1px, transparent 1px);
  background-size: 48px 48px;
}

.split {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 40px;
  align-items: start;
}
.split--wide-left { grid-template-columns: 7fr 5fr; }

.grid {
  display: grid;
  gap: 24px;
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* --------------------------------------------------------------------------
   面板 / 按钮 / 标签
   -------------------------------------------------------------------------- */

.panel {
  padding: 28px;
  background-color: var(--ink-800);
  border: 4px solid var(--ink-700);
  box-shadow: var(--shadow-hard);
}
.panel > :last-child { margin-bottom: 0; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  border: 3px solid transparent;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}
.btn--primary {
  background-color: var(--cyan-400);
  color: var(--ink-950);
  border-color: var(--ink-950);
  box-shadow: 6px 6px 0 0 var(--ink-700);
}
.btn--primary:hover {
  background-color: var(--cyan-200);
  color: var(--ink-950);
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 0 var(--ink-700);
}
.btn--ghost {
  background-color: transparent;
  color: var(--cyan-200);
  border-color: var(--cyan-400);
}
.btn--ghost:hover {
  background-color: rgba(35, 240, 200, 0.12);
  color: var(--cyan-200);
}
.btn--amber {
  background-color: var(--amber-400);
  color: var(--ink-950);
  border-color: var(--ink-950);
  box-shadow: 6px 6px 0 0 var(--amber-900);
}
.btn--amber:hover {
  color: var(--ink-950);
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 0 var(--amber-900);
}

.tag {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--neutral-400);
  background-color: var(--ink-900);
  border: 2px solid var(--ink-700);
}
.tag--cyan { color: var(--cyan-400); border-color: var(--cyan-400); }
.tag--amber { color: var(--amber-400); border-color: var(--amber-900); }
.tag--red { color: var(--signal-500); border-color: var(--signal-500); }

/* --------------------------------------------------------------------------
   图片容器（供页面阶段放置图片）
   -------------------------------------------------------------------------- */

.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--ink-800);
  border: 4px solid var(--ink-700);
  box-shadow: var(--shadow-hard);
}
.img-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--tall { aspect-ratio: 3 / 4; }
.img-frame--square { aspect-ratio: 1 / 1; }

.img-frame__caption {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--neutral-400);
}

/* --------------------------------------------------------------------------
   面包屑
   -------------------------------------------------------------------------- */

.breadcrumb { padding: 20px 0 0; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--neutral-400);
}
.breadcrumb__item { display: flex; align-items: center; gap: 8px; }
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--ink-700);
}
.breadcrumb__link { color: var(--neutral-400); text-decoration: none; }
.breadcrumb__link:hover { color: var(--cyan-400); }
.breadcrumb__current { color: var(--cyan-400); }

/* --------------------------------------------------------------------------
   头部
   -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 300;
  padding: 12px 20px;
  background-color: var(--cyan-400);
  color: var(--ink-950);
  font-weight: 700;
  text-decoration: none;
  border: 3px solid var(--ink-950);
}
.skip-link:focus {
  left: 12px;
  top: 12px;
  color: var(--ink-950);
}

.site-header {
  position: relative;
  z-index: 100;
  background-color: var(--ink-950);
  border-bottom: 4px solid var(--ink-700);
}

.brand-bar {
  background-color: var(--ink-950);
  border-bottom: 1px solid rgba(27, 74, 62, 0.8);
}

.brand-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--neutral-100);
  text-decoration: none;
}
.brand-lockup:hover { color: var(--neutral-100); }

.brand-lockup__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  background-color: var(--cyan-400);
  color: var(--ink-950);
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -0.02em;
  border: 3px solid var(--ink-950);
  box-shadow: 4px 4px 0 0 var(--ink-700);
}

.brand-lockup__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-lockup__name {
  font-family: var(--font-heading);
  font-size: 21px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--neutral-100);
}

.brand-lockup__line {
  margin-top: 2px;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--neutral-400);
}

.round-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 6px 12px;
  background-color: var(--ink-900);
  border: 2px solid var(--ink-700);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan-200);
  white-space: nowrap;
}

.round-status__dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background-color: var(--signal-500);
  animation: roundPulse 1.8s ease-in-out infinite;
}

@keyframes roundPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.78); }
}

.nav-bar {
  position: sticky;
  top: 0;
  z-index: 120;
  background-color: var(--ink-900);
  box-shadow: 0 6px 0 0 rgba(3, 12, 9, 0.6);
}

.nav-bar__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 58px;
  padding-top: 6px;
  padding-bottom: 6px;
}

.site-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__item { margin: 0; }

.site-nav__link {
  display: inline-block;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--neutral-100);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}
.site-nav__link:hover {
  color: var(--cyan-200);
  background-color: rgba(35, 240, 200, 0.07);
}
.site-nav__link[aria-current="page"] {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.tool-link {
  display: inline-block;
  padding: 9px 16px;
  background-color: var(--cyan-400);
  color: var(--ink-950);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border: 2px solid var(--ink-950);
  box-shadow: 4px 4px 0 0 var(--ink-700);
  white-space: nowrap;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}
.tool-link:hover {
  background-color: var(--cyan-200);
  color: var(--ink-950);
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 0 var(--ink-700);
}

.tool-button {
  padding: 7px 12px;
  background-color: transparent;
  color: var(--neutral-400);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid var(--ink-700);
  white-space: nowrap;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}
.tool-button:hover {
  color: var(--cyan-200);
  border-color: var(--cyan-400);
}
.tool-button[disabled] {
  opacity: 0.42;
  cursor: not-allowed;
}
.tool-button[disabled]:hover {
  color: var(--neutral-400);
  border-color: var(--ink-700);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background-color: var(--ink-800);
  color: var(--neutral-100);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: 2px solid var(--ink-700);
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--cyan-400);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background-color: var(--cyan-400);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */

.site-footer {
  margin-top: 0;
  padding-top: 56px;
  background-color: var(--ink-950);
  border-top: 4px solid var(--ink-700);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px 32px;
  padding-bottom: 8px;
}

.footer-brand__name {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--neutral-100);
}
.footer-brand__name:hover { color: var(--cyan-400); }

.footer-brand__line {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--neutral-400);
}

.footer-contact {
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  font-style: normal;
  font-size: 13px;
  color: var(--neutral-400);
}
.footer-contact__row {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 10px;
  align-items: baseline;
}
.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}
.footer-contact__value { word-break: break-word; }

.footer-note {
  max-width: 44ch;
  margin: 20px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--neutral-400);
}

.footer-col__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.footer-col__list {
  display: grid;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col__link {
  font-size: 14px;
  color: var(--neutral-400);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}
.footer-col__link:hover {
  color: var(--neutral-100);
  border-bottom-color: var(--cyan-400);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: 48px;
  padding-top: 20px;
  padding-bottom: 28px;
  border-top: 1px solid var(--ink-700);
  font-size: 13px;
  color: var(--neutral-400);
}

.footer-legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.footer-copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.footer-bottom__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-bottom__link {
  color: var(--neutral-400);
  text-decoration: none;
}
.footer-bottom__link:hover { color: var(--cyan-400); }

/* --------------------------------------------------------------------------
   返回顶部浮动按钮
   -------------------------------------------------------------------------- */

.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 140;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  background-color: var(--cyan-400);
  color: var(--ink-950);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  border: 3px solid var(--ink-950);
  box-shadow: 5px 5px 0 0 var(--ink-700);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 200ms ease, transform 200ms ease, visibility 200ms ease, background-color 160ms ease;
}
.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.to-top:hover { background-color: var(--cyan-200); }

/* --------------------------------------------------------------------------
   滚动显现
   -------------------------------------------------------------------------- */

.reveal { transition: opacity 260ms ease, transform 260ms ease; }
html.js .reveal {
  opacity: 0;
  transform: translateY(14px);
}
html.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   响应式
   -------------------------------------------------------------------------- */

@media (max-width: 1200px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
}

@media (max-width: 1040px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 980px) {
  .split,
  .split--wide-left { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 900px) {
  .nav-bar__inner {
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

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

  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    padding: 8px 16px 18px;
    background-color: var(--ink-950);
    border-top: 3px solid var(--ink-700);
    border-bottom: 3px solid var(--ink-700);
    box-shadow: 0 10px 0 0 rgba(3, 12, 9, 0.65);
  }

  .site-header[data-open="true"] .site-nav { display: block; }

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

  .site-nav__link {
    display: block;
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--ink-700);
  }
  .site-nav__link[aria-current="page"] {
    border-bottom-color: var(--cyan-400);
    border-bottom-width: 3px;
  }

  .header-tools { margin-left: auto; }
}

@media (max-width: 720px) {
  :root { --edge: 16px; }

  .section { padding: 48px 0; }
  .section--tight { padding: 32px 0; }

  .panel { padding: 20px; box-shadow: 6px 6px 0 0 rgba(3, 12, 9, 0.85); }

  .grid--2 { grid-template-columns: 1fr; }

  .brand-lockup__mark {
    width: 38px;
    height: 38px;
    font-size: 16px;
    box-shadow: 3px 3px 0 0 var(--ink-700);
  }
  .brand-lockup__name { font-size: 18px; }
  .brand-lockup__line { font-size: 11px; }

  .round-status { font-size: 11px; padding: 5px 10px; }

  .img-frame { aspect-ratio: 4 / 3; }
  .img-frame--wide { aspect-ratio: 16 / 9; }

  .footer-bottom { margin-top: 36px; }
  .to-top { right: 14px; bottom: 14px; width: 44px; height: 44px; }
}

@media (max-width: 640px) {
  .brand-bar__inner {
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }

  .tool-button--top { display: none; }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

@media (max-width: 420px) {
  .header-tools { width: 100%; justify-content: flex-start; }
  .tool-link { padding: 8px 12px; font-size: 13px; }
}

/* --------------------------------------------------------------------------
   减弱动效
   -------------------------------------------------------------------------- */

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  html.js .reveal {
    opacity: 1;
    transform: none;
  }

  .to-top { transform: none; }
}