/* =========================================================
   万博CN — 共享样式 /assets/site.css
   夜间控制台 · Bento 编辑部 · 锐利直角
   ========================================================= */

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

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

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

ul, ol { padding: 0; }

img, svg, video { max-width: 100%; height: auto; }

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

button { background: none; border: 0; }

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

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩 */
  --ink-900: #0A1622;
  --ink-800: #101F30;
  --ink-700: #16293C;
  --line: #22394F;
  --text: #D7E3EE;
  --muted: #8FA6BB;
  --orange: #FF6B2C;
  --orange-soft: #FF8352;
  --cyan: #35E0D0;
  --amber: #E8B44A;
  --danger: #FF5A6E;
  --on-accent: #0A1622;

  /* 字体三通道 */
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Helvetica Neue", Arial, system-ui, sans-serif;
  --display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Arial Narrow", "Helvetica Neue", system-ui, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  /* 结构 */
  --shell-max: 1280px;
  --pad: 24px;
  --gap: 24px;
  --nav-break: 920px;

  /* 动效 */
  --t-fast: 180ms ease;
  --t-base: 220ms ease;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image:
    linear-gradient(to right, rgba(34, 57, 79, 0.30) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 57, 79, 0.30) 1px, transparent 1px);
  background-size: 120px 120px;
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-stretch: condensed;
  color: #F2F7FB;
}

h1 { font-size: clamp(32px, 4.6vw, 48px); }
h2 { font-size: clamp(24px, 3vw, 32px); }
h3 { font-size: clamp(18px, 2vw, 24px); }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast), border-color var(--t-fast), background-color var(--t-fast);
}

a:hover { color: var(--orange); }

strong, b { font-weight: 700; color: #FFFFFF; }

small { font-size: 12px; }

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 48px 0;
}

::selection {
  background: var(--orange);
  color: var(--on-accent);
}

/* 焦点：始终可见的荧光青外描边 */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 4. 通用排版工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.display-xl {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(48px, 8.5vw, 104px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-stretch: condensed;
}

.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  margin-bottom: 12px;
}

/* ---------- 5. 网格 ---------- */
.grid {
  display: grid;
  gap: var(--gap);
}

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

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

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  border-radius: 0;
}

.btn--primary {
  background: var(--orange);
  color: var(--on-accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--orange-soft);
  color: var(--on-accent);
}

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

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
}

.btn--quiet {
  padding: 0;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.btn--quiet:hover { color: var(--orange); }

/* ---------- 7. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--ink-900);
  border-bottom: 1px solid var(--line);
}

/* 跳过链接 */
.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  display: inline-block;
  padding: 12px 20px;
  background: var(--orange);
  color: var(--on-accent);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: top var(--t-fast);
}

.skip-link:focus {
  top: 8px;
  color: var(--on-accent);
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* 上层：品牌说明 + 期数 + 排查入口 */
.header-upper {
  background: var(--ink-800);
  border-bottom: 1px solid var(--line);
}

.header-upper__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
  padding-block: 6px;
}

.brand-line {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  white-space: nowrap;
}

.brand-line__sep {
  color: var(--orange);
  margin: 0 0.7em;
}

.header-upper__meta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.issue-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}

.issue-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(53, 224, 208, 0.14);
}

.issue-tag__num {
  font-family: var(--mono);
  font-weight: 600;
  color: var(--amber);
}

.cta-check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px;
  border: 1px solid var(--orange);
  color: var(--orange);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  line-height: 1.4;
  white-space: nowrap;
}

.cta-check::after {
  content: "›";
  font-size: 14px;
  line-height: 1;
}

.cta-check:hover,
.cta-check:focus-visible {
  background: var(--orange);
  color: var(--on-accent);
}

/* 下层：品牌 + 六栏目 */
.header-lower {
  background: rgba(10, 22, 34, 0.97);
}

.header-lower__inner {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: var(--gap);
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  align-self: center;
  padding-block: 12px;
  color: var(--text);
}

.brand:hover { color: var(--text); }

.brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: var(--orange);
  color: var(--on-accent);
  font-family: var(--display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1;
}

.brand__text {
  display: flex;
  flex-direction: column;
  font-family: var(--display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.05em;
  line-height: 1.1;
}

.brand__sub {
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.22em;
  color: var(--muted);
}

/* 移动开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  align-self: center;
  padding: 10px 14px;
  border: 1px solid var(--line);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  cursor: pointer;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
}

.nav-toggle__bars span {
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
}

.nav-toggle__label { line-height: 1; }

/* 导航 */
.site-nav {
  margin-inline-start: auto;
}

.site-nav__list {
  display: flex;
  align-items: stretch;
  height: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__item {
  display: flex;
  align-items: stretch;
}

.site-nav__item + .site-nav__item {
  border-left: 1px solid var(--line);
}

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  padding: 0 18px;
  color: var(--text);
  font-size: 15px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 3px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-fast);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--orange);
  background: var(--ink-700);
}

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

.site-nav__link[aria-current="page"] {
  color: var(--orange);
}

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

/* 滚动进度尺 */
.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: transparent;
  pointer-events: none;
}

.scroll-meter__fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transition: width 120ms linear;
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  margin-top: 72px;
  background: var(--ink-800);
  border-top: 1px solid var(--line);
  color: var(--text);
}

.footer__inner {
  display: grid;
  grid-template-columns: minmax(200px, 1.05fr) minmax(0, 1.9fr) minmax(240px, 1.15fr);
  gap: 48px;
  padding-block: 56px 44px;
}

.footer__brand { min-width: 0; }

.brand--footer {
  padding-block: 0;
  margin-bottom: 18px;
}

.footer__tagline {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin: 0 0 10px;
}

.footer__meta {
  font-size: 11px;
  color: var(--line);
  color: #4C6customs;
  margin: 0;
  word-break: break-all;
}

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

.footer__col { min-width: 0; }

.footer__title {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

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

.footer__link {
  display: inline-block;
  font-size: 14px;
  color: var(--text);
  border-bottom: 1px solid transparent;
}

.footer__link:hover,
.footer__link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.footer__contact { min-width: 0; }

.footer__line {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text);
  word-break: break-word;
}

.footer__label {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.footer__line--note {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 2px solid var(--line);
  font-size: 12px;
  color: var(--muted);
}

.footer__bottom {
  background: var(--ink-900);
  border-top: 1px solid var(--line);
}

.footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 18px;
}

.footer__legal,
.footer__copy {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

.footer__notice {
  margin: 0;
  padding-bottom: 22px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.8;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 9. 通用内容组件 ---------- */
/* 正文 */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text);
}

.prose > * + * { margin-top: 0; }

.prose p { margin: 0 0 1.35em; }

.prose h2 {
  margin: 2.2em 0 0.7em;
  padding-top: 0.9em;
  border-top: 1px solid var(--line);
}

.prose h3 { margin: 1.9em 0 0.6em; }

.prose ul,
.prose ol {
  margin: 0 0 1.4em;
  padding-left: 1.3em;
}

.prose li { margin-bottom: 0.5em; }

.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover { color: var(--orange); }

.prose code {
  font-family: var(--mono);
  font-size: 0.88em;
  padding: 2px 6px;
  background: var(--ink-700);
  border: 1px solid var(--line);
}

.prose blockquote {
  margin: 1.6em 0;
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--cyan);
  color: var(--muted);
}

/* 面包屑 */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.crumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.crumbs li + li::before {
  content: "/";
  color: var(--line);
}

.crumbs a:hover,
.crumbs a:focus-visible { color: var(--cyan); }

.crumbs [aria-current="page"] { color: var(--text); }

/* 面板 */
.panel {
  background: var(--ink-700);
  border: 1px solid var(--line);
  padding: 24px;
}

.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.panel__kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* 索引列表 */
.index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.index-list__item { border-bottom: 1px solid var(--line); }

.index-list__link {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 0;
}

.index-list__num {
  flex: 0 0 auto;
  min-width: 2.6em;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.index-list__text {
  font-size: 15px;
  color: var(--text);
}

.index-list__link:hover .index-list__text,
.index-list__link:focus-visible .index-list__text { color: var(--orange); }

.index-list__link:hover .index-list__num,
.index-list__link:focus-visible .index-list__num { color: var(--cyan); }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.6;
  color: var(--muted);
}

.tag--amber {
  color: var(--amber);
  border-color: rgba(232, 180, 74, 0.42);
}

.tag--cyan {
  color: var(--cyan);
  border-color: rgba(53, 224, 208, 0.36);
}

.tag--danger {
  color: var(--danger);
  border-color: rgba(255, 90, 110, 0.42);
}

/* 旁注 */
.note {
  padding: 4px 0 4px 16px;
  border-left: 2px solid var(--cyan);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.note strong { color: var(--text); }

.note--warn {
  border-left-color: var(--danger);
}

/* 图片容器 */
.figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-700);
}

.figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background-color: var(--ink-800);
  background-image:
    repeating-linear-gradient(135deg, rgba(34, 57, 79, 0.55) 0 1px, transparent 1px 12px);
}

.figure__frame > img,
.figure__frame > svg,
.figure__frame > picture {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.figure__cap {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 10. 折叠面板 ---------- */
.accordion {
  border-top: 1px solid var(--line);
}

.accordion__item {
  border-bottom: 1px solid var(--line);
}

.accordion__trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
}

.accordion__trigger:hover,
.accordion__trigger:focus-visible { color: var(--orange); }

.accordion__mark {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
  transition: transform var(--t-base);
}

.accordion__trigger[aria-expanded="true"] .accordion__mark {
  transform: rotate(45deg);
}

.accordion__panel {
  padding: 0 0 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.accordion__panel[hidden] { display: none; }

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1100px) {
  .footer__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
  }

  .footer__contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-7,
  .span-8 { grid-column: span 6; }
  .span-12 { grid-column: 1 / -1; }
}

@media (max-width: var(--nav-break)) {
  .header-lower__inner {
    flex-wrap: wrap;
    gap: 0;
    min-height: 0;
    padding-block: 10px;
  }

  .brand { padding-block: 6px; }

  .nav-toggle {
    display: inline-flex;
    margin-inline-start: auto;
  }

  .site-nav {
    display: none;
    width: 100%;
    margin-inline-start: 0;
    margin-top: 10px;
    border-top: 1px solid var(--line);
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    height: auto;
  }

  .site-nav__item + .site-nav__item {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .site-nav__link {
    padding: 14px 4px 14px 16px;
    font-size: 15px;
  }

  .site-nav__link::after {
    left: 0;
    right: auto;
    top: 0;
    bottom: auto;
    width: 3px;
    height: 100%;
    transform: scaleY(0);
    transform-origin: top center;
  }

  .site-nav__link:hover::after,
  .site-nav__link:focus-visible::after,
  .site-nav__link[aria-current="page"]::after {
    transform: scaleY(1);
  }

  .site-nav__link[aria-current="page"] {
    background: var(--ink-700);
  }
}

@media (max-width: 760px) {
  .footer__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
    padding-block: 44px 36px;
  }

  .footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__contact { grid-column: auto; }
  .site-footer { margin-top: 56px; }
}

@media (max-width: 700px) {
  .grid--12 { grid-template-columns: minmax(0, 1fr); }
  .span-3,
  .span-4,
  .span-5,
  .span-6,
  .span-7,
  .span-8,
  .span-12 { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  :root { --pad: 16px; --gap: 16px; }

  body { font-size: 16px; line-height: 1.75; }

  .prose { max-width: none; font-size: 16px; }

  .panel { padding: 18px; }

  .header-upper__inner { gap: 10px; }

  .brand-line { font-size: 11px; letter-spacing: 0.1em; }

  .cta-check { font-size: 11px; padding: 5px 10px; }

  .footer__bottom-inner { justify-content: flex-start; }
}

@media (max-width: 520px) {
  .issue-tag { display: none; }

  .footer__nav { grid-template-columns: minmax(0, 1fr); }

  .btn { width: 100%; }
}

/* ---------- 12. 减少动效 ---------- */
@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;
    scroll-behavior: auto !important;
  }

  .site-nav__link::after { transition: none; }
  .scroll-meter__fill { transition: none; }
}