/* ============================================================
   carnival-fg.com.cn — 共享样式表 /assets/site.css
   深夜电子嘉年华控制台：Bento 骨架 + 霓虹状态色 + 等宽索引
   ============================================================ */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, dl, dd, figure, blockquote { margin: 0; }

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

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

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

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; }

table { width: 100%; border-collapse: collapse; }

/* ---------- 2. CSS 变量 ---------- */
:root {
  --bg-deep: #0B0714;
  --bg-console: #150E24;
  --line: #2A1F45;
  --ink: #E8E6F2;
  --ink-dim: #A79FC4;
  --violet: #6C2BD9;
  --cyan: #00E5FF;
  --orange: #FF6A00;
  --mint: #22D3A6;
  --amber: #FFD166;
  --magenta: #FF4D6D;
  --panel: #F5F3FF;

  --radius: 14px;
  --radius-sm: 9px;
  --gap: 16px;
  --header-h: 56px;
  --dur: 180ms;
  --shell: 1180px;

  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --glow-violet: 0 0 18px rgba(108, 43, 217, .55);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(720px 520px at 12% -8%, rgba(108, 43, 217, .32), transparent 62%),
    radial-gradient(560px 420px at 106% 4%, rgba(0, 229, 255, .16), transparent 60%),
    radial-gradient(680px 520px at 50% 118%, rgba(255, 106, 0, .12), transparent 64%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -.01em;
  text-shadow: var(--glow-violet);
}

h1 { font-size: 28px; }
h2 { font-size: 24px; }
h3 { font-size: 20px; }
h4 { font-size: 17px; }

@media (min-width: 900px) {
  h1 { font-size: 44px; }
  h2 { font-size: 32px; }
  h3 { font-size: 24px; }
  h4 { font-size: 18px; }
}

.mono {
  font-family: var(--font-mono);
  font-size: .92em;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}

.muted { color: var(--ink-dim); }

.lead {
  font-size: 17px;
  max-width: 68ch;
  color: var(--ink);
}

.prose { max-width: 68ch; }
.prose p + p { margin-top: 12px; }
.prose ul { margin-top: 12px; display: grid; gap: 8px; }
.prose li { padding-left: 18px; position: relative; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

::selection { background: var(--violet); color: #fff; }

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

/* ---------- 4. 布局骨架 ---------- */
.shell {
  width: min(var(--shell), calc(100% - 32px));
  margin-inline: auto;
}

#main-content { scroll-margin-top: calc(var(--header-h) + 16px); }

.section { padding: 40px 0; }

@media (min-width: 900px) {
  .section { padding: 56px 0; }
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 8px 20px;
  margin-bottom: 20px;
}

.section-title { font-size: 24px; }

.section-lede {
  color: var(--ink-dim);
  font-size: 14px;
  max-width: 68ch;
}

.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.bento > * { grid-column: span 12; }

.span-3 { grid-column: span 3; }
.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-9 { grid-column: span 9; }
.span-12 { grid-column: span 12; }

@media (max-width: 1024px) {
  .span-3, .span-4, .span-5 { grid-column: span 6; }
  .span-7, .span-8, .span-9 { grid-column: span 12; }
}

@media (max-width: 640px) {
  .span-3, .span-4, .span-5, .span-6 { grid-column: span 12; }
}

.stack { display: grid; gap: 12px; }

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

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

/* ---------- 5. 页头：紧凑命令栏 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 0 0 10px 10px;
  background: var(--violet);
  color: #fff;
  font-size: 14px;
  transition: top var(--dur);
}

.skip-link:focus { top: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--bg-console);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 18px 40px -34px rgba(0, 0, 0, .95);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: var(--header-h);
  padding: 6px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 2px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(140deg, var(--violet), #3A0F8F);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  box-shadow: 0 0 18px rgba(108, 43, 217, .6);
}

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

.brand-name {
  font-size: 17px;
  font-weight: 900;
  letter-spacing: .02em;
  text-shadow: var(--glow-violet);
}

.brand-sub {
  font-size: 11px;
  color: var(--ink-dim);
}

.site-nav {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
}

.nav-item { position: relative; }

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  color: var(--ink-dim);
  font-size: 14px;
  transition: color var(--dur), background var(--dur), border-color var(--dur);
}

.nav-idx {
  font-size: 11px;
  color: rgba(167, 159, 196, .82);
  transition: color var(--dur);
}

.nav-label { display: inline-block; }

.nav-link:hover,
.nav-link:hover .nav-idx {
  color: var(--cyan);
}

.nav-link:hover { background: rgba(0, 229, 255, .07); }

.nav-link[aria-current="page"] {
  color: var(--ink);
  background: rgba(108, 43, 217, .16);
  border-color: rgba(108, 43, 217, .5);
}

.nav-link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  border-radius: 2px;
  background: var(--violet);
  box-shadow: 0 0 10px var(--violet);
}

.nav-cta { white-space: nowrap; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(108, 43, 217, .14);
  color: var(--ink);
  transition: border-color var(--dur), color var(--dur);
}

.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle-bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform var(--dur), opacity var(--dur);
}

.nav-toggle-label { font-size: 11px; color: var(--ink-dim); }

.site-header[data-open] .nav-toggle {
  border-color: var(--cyan);
  color: var(--cyan);
}

.site-header[data-open] .nav-toggle-label { color: var(--cyan); }

.site-header[data-open] .nav-toggle-bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle-bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.header-trace {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  box-shadow: 0 0 12px rgba(0, 229, 255, .7);
  pointer-events: none;
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 14px 16px 18px;
    background: var(--bg-console);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 28px 52px -30px rgba(0, 0, 0, .95);
    max-height: calc(100vh - var(--header-h) - 16px);
    overflow-y: auto;
  }

  .site-header[data-open] .site-nav { display: flex; }

  .nav-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    width: 100%;
  }

  .nav-link {
    padding: 10px 12px;
    border-color: var(--line);
    font-size: 15px;
  }

  .nav-link[aria-current="page"] { border-color: rgba(108, 43, 217, .9); }

  .nav-cta {
    width: 100%;
    justify-content: center;
    margin-top: 4px;
  }
}

@media (max-width: 400px) {
  .nav-list { grid-template-columns: minmax(0, 1fr); }
  .brand-sub { display: none; }
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-top: 60px;
  padding: 36px 0 20px;
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 24px;
}

.footer-brand { max-width: 34ch; }

.footer-brand-name {
  margin-top: 10px;
  font-size: 18px;
  font-weight: 900;
  text-shadow: var(--glow-violet);
}

.footer-brand-note {
  margin-top: 4px;
  font-size: 13px;
  color: var(--ink-dim);
}

.footer-sync {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--cyan);
}

.footer-sync-time { color: inherit; }

.footer-heading {
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ink-dim);
  text-shadow: none;
}

.footer-links {
  display: grid;
  gap: 6px;
  font-size: 14px;
}

.footer-links a {
  color: var(--ink-dim);
  border-bottom: 1px solid transparent;
  transition: color var(--dur), border-color var(--dur);
}

.footer-links a:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.footer-meta {
  display: grid;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-dim);
}

.footer-meta .mono { color: var(--ink); }

.footer-col-contact { max-width: 42ch; }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 20px;
  margin-top: 26px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.footer-legal,
.footer-note {
  font-size: 12px;
  color: var(--ink-dim);
}

@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .footer-inner { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .footer-brand { max-width: none; }
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background var(--dur), border-color var(--dur), color var(--dur), transform var(--dur);
}

.btn-primary {
  background: var(--violet);
  color: #fff;
  box-shadow: 0 12px 28px -16px rgba(108, 43, 217, .95);
}

.btn-primary:hover {
  background: #7C3BED;
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--orange);
  color: #1A0B00;
}

.btn-accent:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- 8. 信息块与文本组件 ---------- */
.panel {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-console);
  transition: border-color var(--dur), transform var(--dur), box-shadow var(--dur);
}

.panel:hover {
  border-color: rgba(0, 229, 255, .75);
  transform: translateY(-2px);
  box-shadow: 0 24px 46px -32px rgba(0, 229, 255, .9);
}

.panel--focus {
  padding: 26px;
  border-color: rgba(108, 43, 217, .6);
  background:
    linear-gradient(160deg, rgba(108, 43, 217, .24), rgba(21, 14, 36, .96) 58%);
}

.panel--cut {
  border-radius: 0;
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 0 100%);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.callout {
  padding: 14px 16px;
  border-left: 3px solid var(--violet);
  border-radius: 0 12px 12px 0;
  background: rgba(108, 43, 217, .1);
  color: var(--ink-dim);
  font-size: 14px;
}

.callout--amber {
  border-color: var(--amber);
  background: rgba(255, 209, 102, .08);
}

.callout--mint {
  border-color: var(--mint);
  background: rgba(34, 211, 166, .08);
}

/* ---------- 9. 索引、表格、面包屑 ---------- */
.index-list { display: grid; gap: 2px; }

.index-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 12px 14px;
  border: 1px solid transparent;
  border-radius: 10px;
  transition: background var(--dur), border-color var(--dur);
}

.index-item:hover {
  background: rgba(108, 43, 217, .12);
  border-color: var(--line);
}

.index-no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.index-mark {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
}

.data-table {
  width: 100%;
  font-size: 14px;
}

.data-table caption {
  padding-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
  text-align: left;
}

.data-table th,
.data-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.data-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--ink-dim);
}

.data-table tbody tr { transition: background var(--dur); }

.data-table tbody tr:hover { background: rgba(0, 229, 255, .06); }

.data-table td.mono { color: var(--cyan); }

.breadcrumb {
  padding: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(167, 159, 196, .5);
}

.breadcrumb a:hover { color: var(--cyan); }

/* ---------- 10. 状态标签与状态点 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-dim);
}

.chip--cyan { border-color: rgba(0, 229, 255, .6); background: rgba(0, 229, 255, .08); color: var(--cyan); }
.chip--violet { border-color: rgba(108, 43, 217, .7); background: rgba(108, 43, 217, .16); color: #C9B4FF; }
.chip--orange { border-color: rgba(255, 106, 0, .6); background: rgba(255, 106, 0, .12); color: #FFB27A; }
.chip--mint { border-color: rgba(34, 211, 166, .6); background: rgba(34, 211, 166, .1); color: var(--mint); }
.chip--amber { border-color: rgba(255, 209, 102, .6); background: rgba(255, 209, 102, .1); color: var(--amber); }
.chip--magenta { border-color: rgba(255, 77, 109, .6); background: rgba(255, 77, 109, .12); color: #FF8AA0; }

.dot {
  display: inline-block;
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-dim);
}

.dot--mint {
  --pulse: 34, 211, 166;
  background: var(--mint);
  animation: dot-pulse 2.4s ease-in-out infinite;
}

.dot--amber {
  --pulse: 255, 209, 102;
  background: var(--amber);
  animation: dot-pulse 2.4s ease-in-out infinite;
}

.dot--magenta {
  background: var(--magenta);
  box-shadow: 0 0 10px rgba(255, 77, 109, .8);
}

@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(var(--pulse), .55); opacity: 1; }
  50% { box-shadow: 0 0 0 7px rgba(var(--pulse), 0); opacity: .75; }
}

/* ---------- 11. 图片容器（页面阶段放置图片） ---------- */
.media-frame {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--bg-console);
  background-image:
    linear-gradient(135deg, rgba(108, 43, 217, .42), rgba(11, 7, 20, .92) 56%, rgba(0, 229, 255, .22)),
    repeating-linear-gradient(45deg, rgba(232, 230, 242, .06) 0 2px, transparent 2px 9px);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame--cut {
  border-radius: 0;
  clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
}

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
  background: linear-gradient(180deg, rgba(11, 7, 20, 0), rgba(11, 7, 20, .88));
}

/* ---------- 12. 显现与动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 220ms ease-out, transform 220ms ease-out;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

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

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

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .panel:hover,
  .btn:hover { transform: none; }
}