/* ==========================================================================
   bet9十年信誉 · 入口年鉴 —— 全站共享样式 /assets/site.css
   墨底黑档案底 + 经纬网格 + 青海湖蓝主色 + 日落橙锚点
   ========================================================================== */

:root {
  --ink: #0B0E11;
  --ink-2: #141B21;
  --ink-3: #101720;
  --lake: #1E7FC2;
  --lake-soft: #7CC0E6;
  --sunset: #FF7A2F;
  --v-yellow: #F2C230;
  --v-green: #2FA36B;
  --v-red: #D9453D;
  --paper: #F4F1EA;
  --text: #E6E3DB;
  --mist: #9AA6B2;
  --line: #2A323A;

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  --w-max: 1240px;
  --gutter: clamp(18px, 4vw, 56px);
  --gap: 28px;
  --radius-card: 22px 22px 22px 6px;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

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

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

body {
  margin: 0;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(42, 50, 58, .34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 50, 58, .34) 1px, transparent 1px);
  background-size: 76px 76px, 76px 76px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; }
main { display: block; }

::selection { background: var(--lake); color: var(--paper); }

/* ---------- 中文排版 ---------- */
h1, h2, h3, h4 {
  margin: 0 0 .5em;
  font-family: var(--font-display);
  font-weight: 900;
  color: var(--paper);
  line-height: 1.2;
  letter-spacing: .01em;
}
h1 { font-size: clamp(34px, 6vw, 68px); }
h2 { font-size: clamp(24px, 3.6vw, 38px); }
h3 { font-size: 22px; font-weight: 800; }
p { margin: 0 0 1em; max-width: 42em; }
strong { color: var(--paper); font-weight: 800; }

.mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}
.meta {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--mist);
}

/* ---------- 焦点与可达性 ---------- */
:focus-visible {
  outline: 2px solid var(--sunset);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 14px;
  top: -70px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--sunset);
  color: var(--ink);
  font-weight: 800;
  border-radius: 0 0 12px 12px;
  transition: top .18s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section { padding: clamp(44px, 7vw, 84px) 0; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px 18px;
  padding-bottom: 14px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}
.section-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--sunset);
}

.layout-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}
@media (min-width: 900px) {
  .layout-grid { grid-template-columns: repeat(12, 1fr); }
  .span-4 { grid-column: span 4; }
  .span-5 { grid-column: span 5; }
  .span-6 { grid-column: span 6; }
  .span-7 { grid-column: span 7; }
  .span-8 { grid-column: span 8; }
  .span-12 { grid-column: span 12; }
}

/* ---------- 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(11, 14, 17, .94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}
.header-inner {
  position: relative;
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 12px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
}

.header-brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  margin-right: auto;
}
.brand-link {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
}
.brand-mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: .08em;
  color: var(--paper);
}
.brand-sub {
  padding-left: 10px;
  border-left: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--lake-soft);
}
.brand-tagline { display: none; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--ink-2);
  color: var(--paper);
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  transition: background-color .16s var(--ease), border-color .16s var(--ease), transform .16s var(--ease);
}
.nav-toggle:hover { border-color: var(--lake-soft); transform: translateY(-2px); }
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--lake-soft);
  transition: background-color .16s var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--lake-soft);
  transition: transform .18s var(--ease);
}
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }
.nav-toggle-text { white-space: nowrap; }
.nav-toggle[data-open] { background: var(--lake); border-color: var(--lake); color: var(--paper); }
.nav-toggle[data-open] .nav-toggle-bars { background: transparent; }
.nav-toggle[data-open] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); background: var(--paper); }
.nav-toggle[data-open] .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); background: var(--paper); }

.site-nav { display: none; width: 100%; }
.site-nav[data-open] { display: block; }

.nav-list {
  counter-reset: nav;
  display: flex;
  gap: 10px;
  padding: 4px 0 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.nav-list::-webkit-scrollbar { height: 4px; }
.nav-list::-webkit-scrollbar-thumb { background: var(--line); border-radius: 4px; }
.nav-item { counter-increment: nav; flex: 0 0 auto; scroll-snap-align: start; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--ink-2);
  color: var(--text);
  font-size: 15px;
  font-weight: 800;
  white-space: nowrap;
  transition: transform .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease), color .16s var(--ease);
}
.nav-link::before {
  content: counter(nav, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--mist);
}
.nav-link:hover {
  transform: translateY(-2px);
  border-color: var(--lake-soft);
  color: var(--paper);
}
.nav-link[aria-current="page"] {
  background: var(--lake);
  border-color: var(--lake);
  color: var(--paper);
}
.nav-link[aria-current="page"]::before { color: var(--paper); opacity: .8; }

.nav-quick {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 12px 0 4px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
}
.nav-quick-label {
  font-family: var(--font-mono);
  letter-spacing: .18em;
  color: var(--v-yellow);
}
.nav-quick-link {
  color: var(--lake-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.nav-quick-link:hover { color: var(--sunset); border-bottom-color: var(--sunset); }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
}
.scroll-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--lake), var(--sunset));
  transition: transform .12s linear;
}

@media (min-width: 1000px) {
  .header-inner {
    flex-wrap: nowrap;
    align-items: center;
    gap: 30px;
    min-height: 84px;
    padding: 14px var(--gutter);
  }
  .brand-tagline {
    display: block;
    margin: 0;
    font-size: 12.5px;
    letter-spacing: .02em;
    color: var(--mist);
  }
  .nav-toggle { display: none; }
  .site-nav {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    width: auto;
    margin-left: auto;
  }
  .nav-list {
    overflow: visible;
    padding: 0;
    gap: 4px;
  }
  .nav-link {
    border-color: transparent;
    background: transparent;
    border-radius: 10px;
    padding: 8px 11px;
    font-size: 15px;
  }
  .nav-link:hover { background: var(--ink-2); border-color: var(--line); }
  .nav-link[aria-current="page"] { background: var(--lake); border-color: var(--lake); }
  .nav-quick {
    border-top: 0;
    padding: 0;
    gap: 6px 14px;
    font-size: 12px;
  }
}
@media (min-width: 1260px) {
  .site-nav { flex-direction: row; align-items: center; gap: 18px; }
  .nav-quick {
    border-left: 1px solid var(--line);
    padding-left: 18px;
    flex-wrap: nowrap;
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: clamp(64px, 9vw, 110px);
  border-top: 1px solid var(--line);
  background:
    radial-gradient(1100px 320px at 10% -20%, rgba(30, 127, 194, .20), transparent 70%),
    linear-gradient(180deg, #0B0E11 0%, #141B21 100%);
}
.footer-inner {
  width: 100%;
  max-width: var(--w-max);
  margin: 0 auto;
  padding: 52px var(--gutter) 34px;
}
.footer-top { display: grid; gap: 36px; }

.footer-brand { min-width: 0; }
.footer-brand-link {
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-brand-mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  letter-spacing: .08em;
  color: var(--paper);
}
.footer-brand-sub {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--lake-soft);
}
.footer-tagline {
  margin: 14px 0 0;
  max-width: 30ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-grid { display: grid; gap: 26px 20px; grid-template-columns: 1fr; }
.footer-col-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--v-yellow);
}
.footer-links { display: flex; flex-direction: column; gap: 9px; }
.footer-link {
  width: fit-content;
  font-size: 15px;
  color: var(--text);
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.footer-link:hover { color: var(--paper); border-bottom-color: var(--lake); }

.footer-contact {
  margin-top: 38px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 12px;
}
.footer-contact-line {
  margin: 0;
  font-size: 14px;
  color: var(--text);
}
.footer-note {
  margin: 0;
  max-width: 62ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-legal {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 22px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--mist);
}
.footer-icp { color: var(--mist); }
.footer-copy { color: var(--mist); }

@media (min-width: 560px) {
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  .footer-top { grid-template-columns: minmax(240px, 4fr) 8fr; gap: 48px; align-items: start; }
  .footer-contact { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 32px; }
  .footer-copy { margin-left: auto; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--ink-2);
  color: var(--paper);
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  transition: transform .16s var(--ease), background-color .16s var(--ease), border-color .16s var(--ease), color .16s var(--ease);
}
.btn:hover { transform: translateY(-2px); border-color: var(--lake-soft); }
.btn-primary { background: var(--lake); border-color: var(--lake); color: var(--paper); }
.btn-primary:hover { background: #2489CF; border-color: var(--lake-soft); }
.btn-accent { background: var(--sunset); border-color: var(--sunset); color: var(--ink); }
.btn-accent:hover { background: #FF8C4C; border-color: var(--sunset); }
.btn-ghost { background: transparent; color: var(--lake-soft); }
.btn-ghost:hover { background: rgba(30, 127, 194, .12); color: var(--paper); }
.btn-sm { padding: 9px 16px; font-size: 14px; }

/* ---------- 面包屑 ---------- */
.crumbs { padding: 20px 0 0; }
.crumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--mist);
}
.crumbs-item { display: inline-flex; align-items: center; gap: 8px; }
.crumbs-item + .crumbs-item::before { content: "/"; color: var(--line); }
.crumbs-link { color: var(--lake-soft); }
.crumbs-link:hover { color: var(--sunset); }
.crumbs-current { color: var(--mist); }

/* ---------- 卡片与标签 ---------- */
.card {
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}
.card:hover { transform: translateY(-2px); border-color: var(--lake); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}
.tag--lake { color: var(--lake-soft); border-color: rgba(124, 192, 230, .45); }
.tag--yellow { color: var(--v-yellow); border-color: rgba(242, 194, 48, .42); }
.tag--green { color: var(--v-green); border-color: rgba(47, 163, 107, .45); }
.tag--red { color: var(--v-red); border-color: rgba(217, 69, 61, .45); }

/* ---------- 索引条 ---------- */
.index-strip {
  display: flex;
  gap: 12px;
  padding: 6px 2px 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.index-strip::-webkit-scrollbar { height: 4px; }
.index-strip::-webkit-scrollbar-thumb { background: var(--line); border-radius: 4px; }
.index-strip > * { flex: 0 0 auto; scroll-snap-align: start; }
.index-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 15px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--ink-2);
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  transition: transform .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease), color .16s var(--ease);
}
.index-link:hover { transform: translateY(-2px); border-color: var(--lake); color: var(--paper); }
.index-link[data-active] {
  border-color: var(--sunset);
  background: rgba(255, 122, 47, .12);
  color: var(--paper);
}

/* ---------- 对照表 ---------- */
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--ink-2);
  -webkit-overflow-scrolling: touch;
}
.data-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14.5px;
}
.data-table th,
.data-table td {
  padding: 12px 15px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}
.data-table thead th {
  position: sticky;
  top: 0;
  z-index: 3;
  background: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--mist);
}
.data-table th:first-child,
.data-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--ink-3);
}
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover td { background: rgba(30, 127, 194, .10); }
.data-table tbody tr:hover td:first-child { background: #15212D; }

/* ---------- 折叠条目 ---------- */
.fold {
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--ink-2);
}
.fold + .fold { margin-top: 10px; }
.fold summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-weight: 800;
  color: var(--paper);
}
.fold summary::-webkit-details-marker { display: none; }
.fold summary::before {
  content: "＋";
  font-family: var(--font-mono);
  color: var(--sunset);
}
.fold[open] summary::before { content: "－"; }
.fold-body {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 图形容器（页面阶段放入内联 SVG 或图片） ---------- */
.figure-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  border-radius: 20px 20px 20px 6px;
  background-color: var(--ink-2);
  background-image:
    linear-gradient(rgba(42, 50, 58, .55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 50, 58, .55) 1px, transparent 1px);
  background-size: 34px 34px, 34px 34px;
}
.figure-frame img,
.figure-frame svg,
.figure-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure-frame--wide { aspect-ratio: 16 / 9; }
.figure-frame--tall { aspect-ratio: 3 / 4; }
.figure-frame--square { aspect-ratio: 1 / 1; }
.figure-caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--mist);
}
.media-grid { display: grid; gap: 20px; grid-template-columns: 1fr; }

.organic-block {
  position: relative;
  display: block;
  min-height: 120px;
  border-radius: 38% 62% 55% 45% / 48% 42% 58% 52%;
  background: radial-gradient(circle at 32% 28%, rgba(30, 127, 194, .55), rgba(30, 127, 194, 0) 72%);
}

@media (min-width: 720px) {
  .media-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1080px) {
  .media-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .card:hover,
  .btn:hover,
  .nav-link:hover,
  .index-link:hover,
  .nav-toggle:hover { transform: none; }
  .scroll-progress-bar { transition: none; }
}