:root {
  --km-paper: #edeef3;
  --km-ink: #1d1f2e;
  --km-ink-soft: #4a4d61;
  --km-accent: #9b2c6b;
  --km-accent-deep: #7d2155;
  --km-mint: #8fb3a8;
  --km-mint-wash: #dbe7e3;
  --km-rose-wash: #f1dde8;
  --km-line: #d0d2de;
  --km-surface: #fafafd;
  --km-r-big: 42px;
  --km-r-small: 24px;
  --km-cjk: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  --km-latin: "Dubai", "Segoe UI Semibold", "Tahoma", sans-serif;
  --km-gutter: 16px;
  --km-wide: 1180px;
}

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

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

body {
  margin: 0;
  background: var(--km-paper);
  color: var(--km-ink);
  font-family: var(--km-cjk);
  font-size: 16px;
  line-height: 1.8;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--km-accent); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--km-accent-deep); text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--km-accent); outline-offset: 3px; border-radius: 6px; }

.km-skip {
  position: absolute; left: var(--km-gutter); top: -60px; z-index: 20;
  background: var(--km-ink); color: #fff; padding: 10px 16px; border-radius: 12px;
  min-height: 44px; display: inline-flex; align-items: center;
}
.km-skip:focus { top: 8px; color: #fff; }

/* 页头 */
.km-top { border-bottom: 1px solid var(--km-line); background: var(--km-paper); }
.km-top-in {
  max-width: var(--km-wide); margin: 0 auto; padding: 4px var(--km-gutter) 0;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0 12px; min-height: 64px;
}
.km-top-in .km-nav { flex: 1 1 100%; }
.km-nav ul { margin-left: -12px; }
.km-brand { color: var(--km-ink); display: inline-flex; align-items: center; min-height: 44px; }
.km-brand:hover { color: var(--km-ink); }
.km-mark { display: block; height: 30px; width: auto; }
.km-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 2px 4px; }
.km-nav a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px;
  color: var(--km-ink); text-decoration: none; border-radius: 999px; font-size: 15px;
}
.km-nav a:hover { background: var(--km-surface); }
.km-nav a[aria-current="page"] { box-shadow: inset 0 -3px 0 var(--km-accent); border-radius: 0; }

.km-main { max-width: var(--km-wide); margin: 0 auto; padding: 0 var(--km-gutter) 56px; }

/* 标题通用 */
.km-h1, .km-h2, .km-faq-q, .km-pick-link, .km-list-t {
  line-break: strict; text-wrap: balance; overflow-wrap: break-word;
}
.km-h1 { font-size: 36px; line-height: 1.22; font-weight: 700; margin: 0; letter-spacing: 0; }
.km-h2 {
  font-size: 24px; line-height: 1.4; margin: 48px 0 14px; font-weight: 700;
  display: flex; align-items: baseline; gap: 10px;
}
.km-h2t { min-width: 0; }
.km-seg { display: inline-block; vertical-align: top; }
.km-nw { white-space: nowrap; }
.km-tick {
  flex: none; display: inline-block; width: 22px; height: 14px; position: relative; top: 1px;
  border-bottom: 2px solid var(--km-accent);
  background:
    linear-gradient(var(--km-accent), var(--km-accent)) 0 100% / 2px 14px no-repeat,
    linear-gradient(var(--km-accent), var(--km-accent)) 50% 100% / 2px 8px no-repeat,
    linear-gradient(var(--km-accent), var(--km-accent)) 100% 100% / 2px 14px no-repeat;
}

/* 首屏 */
.km-hero {
  display: grid; gap: 16px; padding: 20px 0 12px;
  grid-template-areas: "h" "card" "pick" "lead" "gauge";
}
.km-hero-l, .km-hero-r { display: contents; }
.km-hero-h { grid-area: h; font-size: 32px; }
.km-h1-seg { display: inline-block; }
.km-hero-lead { grid-area: lead; margin: 0; color: var(--km-ink-soft); max-width: 34em; }
.km-pick {
  grid-area: pick; border-left: 4px solid var(--km-accent); padding: 4px 0 4px 14px;
}
.km-pick-tag { margin: 0; font-size: 13px; color: var(--km-ink-soft); }
.km-pick-link {
  display: inline-flex; align-items: center; min-height: 44px;
  font-size: 18px; font-weight: 700; line-height: 1.45; color: var(--km-ink);
}
.km-pick-why { margin: 0; font-size: 15px; color: var(--km-ink-soft); }

.km-gauge {
  grid-area: gauge; background: var(--km-surface); border: 1px solid var(--km-line);
  border-radius: var(--km-r-big); padding: 22px 20px 16px;
}
.km-frames { display: flex; align-items: flex-end; gap: 0; height: 104px; }
.km-frame {
  display: block; border: 2px solid var(--km-ink); border-radius: 12px; padding: 6px; background: transparent;
}
.km-frame-in { display: block; width: 100%; height: 100%; border: 1px dashed var(--km-mint); border-radius: 6px; }
.km-frame-tall { width: 64px; height: 92px; margin-left: 12%; }
.km-frame-wide { width: 128px; height: 90px; margin-left: auto; margin-right: 10%; border-color: var(--km-accent); }
.km-tape {
  margin-top: 12px; display: flex; height: 64px; border-radius: 14px; overflow: hidden;
  border: 2px solid var(--km-ink);
  background-image:
    repeating-linear-gradient(90deg, var(--km-ink) 0 1px, transparent 1px 10px),
    repeating-linear-gradient(90deg, var(--km-ink) 0 2px, transparent 2px 50px);
  background-size: 100% 10px, 100% 18px;
  background-repeat: no-repeat;
  background-position: 0 0, 0 0;
}
.km-tape-seg {
  display: flex; align-items: flex-end; gap: 6px; padding: 0 10px 8px; font-size: 13px; line-height: 1.3;
}
.km-tape-seg b { font-family: var(--km-cjk); font-size: 18px; }
.km-tape-seg i { font-style: normal; display: inline-block; }
.km-tape-narrow { flex: 0 0 44%; background-color: rgba(143, 179, 168, .35); border-right: 2px solid var(--km-ink); }
.km-tape-wide { flex: 1 1 auto; background-color: rgba(155, 44, 107, .12); color: var(--km-accent-deep); }
.km-tape-foot { position: relative; margin: 6px 0 0; height: 20px; font-family: var(--km-latin); font-size: 13px; color: var(--km-ink-soft); }
.km-tape-foot span { position: absolute; top: 0; white-space: nowrap; }
.km-tape-n1 { right: 56%; padding-right: 6px; }
.km-tape-n2 { left: 44%; padding-left: 6px; }

/* 码卡 */
.km-card {
  grid-area: card; background: var(--km-surface); border: 1px solid var(--km-line);
  border-radius: var(--km-r-small); padding: 16px 18px;
}
.km-card-row { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 12px; }
.km-card-label { font-size: 14px; color: var(--km-ink-soft); }
.km-code {
  font-family: var(--km-latin); font-size: 28px; letter-spacing: 1px; color: var(--km-ink);
  background: none; padding: 0; line-height: 1.2;
}
.km-copy {
  margin-left: auto; min-height: 44px; min-width: 76px; padding: 0 18px; border: 0; border-radius: 999px;
  background: var(--km-accent); color: #fff; font-family: var(--km-cjk); font-size: 15px; cursor: pointer;
}
.km-copy:hover { background: var(--km-accent-deep); }
.km-copy.is-done { background: var(--km-ink); }
.km-card-note { margin: 10px 0 0; font-size: 14px; line-height: 1.65; color: var(--km-ink); }
.km-go {
  display: flex; align-items: center; justify-content: center; text-align: center; min-height: 48px; margin-top: 12px;
  padding: 8px 16px; border-radius: 999px; border: 2px solid var(--km-ink); color: var(--km-ink);
  text-decoration: none; font-weight: 700; line-height: 1.4;
}
.km-go:hover { background: var(--km-ink); color: #fff; }
.km-card-disc { margin: 10px 0 0; font-size: 13px; line-height: 1.65; color: var(--km-ink-soft); }

/* 首页正文区块 */
.km-homebody { max-width: 46em; padding-bottom: 8px; }
.km-homebody p, .km-homebody li { max-width: 38em; }
.km-homebody .km-pair {
  display: grid; gap: 14px; margin: 16px 0;
}
.km-homebody .km-pair > div {
  background: var(--km-surface); border: 1px solid var(--km-line); border-radius: var(--km-r-small); padding: 4px 18px;
}
.km-homebody .km-pair h3 { font-size: 17px; margin: 14px 0 4px; }
.km-homelist-ul { list-style: none; margin: 0; padding: 0; }
.km-homelist-ul li { padding: 12px 0; border-top: 1px solid var(--km-line); }
.km-homelist-ul a { display: inline-flex; align-items: center; min-height: 44px; font-weight: 700; font-size: 17px; }
.km-homelist-d { display: block; color: var(--km-ink-soft); font-size: 15px; }
.km-homelist-more a, .km-after-go a, .km-prose p a { padding: 10px 0; }

/* 面包屑 */
.km-crumbs ol { list-style: none; margin: 0; padding: 12px 0 0; display: flex; flex-wrap: wrap; font-size: 14px; color: var(--km-ink-soft); }
.km-crumbs li + li::before { content: "/"; margin: 0 8px; color: var(--km-line); }
.km-crumbs li { display: inline-flex; align-items: center; }
.km-crumbs li:last-child { min-width: 0; flex: 1 1 0; }
.km-crumbs li:last-child span { display: block; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.km-crumbs a { display: inline-flex; align-items: center; min-height: 44px; color: var(--km-ink-soft); }

/* 列表页 */
.km-listhead { padding: 8px 0 12px; border-bottom: 2px solid var(--km-ink); }
.km-listintro p { max-width: 38em; color: var(--km-ink-soft); }
.km-listcount { margin: 0; font-size: 14px; font-family: var(--km-cjk); }
.km-list { list-style: none; margin: 0; padding: 0; }
.km-list-item { padding: 20px 0; border-bottom: 1px solid var(--km-line); }
.km-list-t { display: inline-flex; align-items: center; min-height: 44px; font-size: 20px; font-weight: 700; color: var(--km-ink); }
.km-list-d { margin: 4px 0; max-width: 38em; }
.km-list-m { margin: 0; font-size: 14px; color: var(--km-ink-soft); }
.km-pager { display: flex; gap: 12px; align-items: center; padding: 20px 0; }
.km-pager-a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px; border: 1px solid var(--km-line); border-radius: 999px; }

/* 文章页 */
.km-arthead { padding: 8px 0 18px; }
.km-h1-art, .km-h1-list, .km-h1-plain { font-size: 30px; }
.km-byline { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 14px; color: var(--km-ink-soft); }
.km-cover { margin: 0 0 24px; background: var(--km-surface); border: 1px solid var(--km-line); border-radius: var(--km-r-big); overflow: hidden; }
.km-cover img { width: 100%; }
@media (min-width: 1000px) { .km-cover { max-width: 860px; } }
.km-cover figcaption { padding: 10px 20px 14px; font-size: 14px; color: var(--km-ink-soft); }
.km-artgrid { display: grid; gap: 24px; }
.km-toc {
  background: var(--km-surface); border: 1px solid var(--km-line); border-radius: var(--km-r-small); padding: 14px 18px;
}
.km-toc-h { margin: 0 0 4px; font-weight: 700; font-size: 15px; }
.km-toc-ol { margin: 0; padding-left: 1.4em; font-size: 15px; }
.km-toc-ol a { display: inline-flex; align-items: center; min-height: 44px; line-height: 1.45; color: var(--km-ink); }
.km-article { min-width: 0; font-size: 17px; }
.km-article > p, .km-article > ul, .km-article > ol, .km-article > blockquote { max-width: 38em; }
.km-article li { margin: 6px 0; }
.km-article strong { font-weight: 700; }
.km-article h3 { font-size: 19px; margin: 28px 0 8px; }
.km-article .km-card { margin: 22px 0; max-width: 34em; border: 2px solid var(--km-ink); }
.km-article .km-card-note { font-size: 15px; }
.km-shot { margin: 24px 0; max-width: 40em; }
.km-shot img { border: 1px solid var(--km-line); border-radius: var(--km-r-small); background: #fff; }
.km-shot-cap { margin-top: 8px; font-size: 14px; line-height: 1.65; color: var(--km-ink-soft); padding-left: 12px; border-left: 3px solid var(--km-mint); }
.km-pair-shots { display: grid; gap: 14px; align-items: start; max-width: 44em; }
.km-pair-shots .km-shot { margin: 0; }
.km-note {
  max-width: 38em; background: var(--km-rose-wash); border-radius: var(--km-r-small); padding: 4px 18px; margin: 20px 0;
}
.km-note p { margin: 12px 0; }
.km-steps { counter-reset: kmstep; list-style: none; padding-left: 0; }
.km-steps > li { counter-increment: kmstep; position: relative; padding-left: 44px; margin: 14px 0; }
.km-steps > li::before {
  content: counter(kmstep); position: absolute; left: 0; top: 2px; width: 30px; height: 30px;
  border: 2px solid var(--km-accent); border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-family: var(--km-latin); font-size: 15px; color: var(--km-accent); line-height: 1;
}

/* 表格 */
.km-tablewrap { margin: 20px 0; overflow-x: auto; border: 1px solid var(--km-line); border-radius: var(--km-r-small); background: var(--km-surface); }
.km-table { border-collapse: collapse; width: 100%; font-size: 15px; line-height: 1.6; }
.km-table th, .km-table td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--km-line); }
.km-table th { background: var(--km-ink); color: #fff; font-weight: 700; white-space: nowrap; }
.km-table tr:last-child td { border-bottom: 0; }
.km-table td:first-child { font-weight: 700; min-width: 5em; }

/* FAQ 与文末 */
.km-faq { max-width: 46em; margin-top: 36px; border-top: 2px solid var(--km-ink); }
.km-faq-item { padding: 6px 0 10px; border-bottom: 1px solid var(--km-line); }
.km-faq-q { font-size: 18px; margin: 14px 0 6px; line-height: 1.5; }
.km-faq-a { margin: 0 0 6px; max-width: 38em; }
.km-after { max-width: 46em; margin-top: 28px; }
.km-tags { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.km-tags-h { font-size: 14px; color: var(--km-ink-soft); margin-right: 4px; }
.km-tag { display: inline-flex; align-items: center; min-height: 34px; padding: 0 12px; border: 1px solid var(--km-line); border-radius: 999px; font-size: 14px; background: var(--km-surface); }
.km-after-go p { max-width: 38em; }

/* 站务页、搜索、404 */
.km-plain { max-width: 46em; }
.km-plainhead { padding: 8px 0 14px; border-bottom: 2px solid var(--km-ink); }
.km-prose { font-size: 16px; }
.km-prose p, .km-prose li { max-width: 38em; }
.km-prose h2 { font-size: 20px; margin: 30px 0 8px; }
.km-plain-side { list-style: none; padding: 16px 0 0; margin: 24px 0 0; border-top: 1px solid var(--km-line); display: flex; flex-wrap: wrap; gap: 0 18px; }
.km-plain-side a { display: inline-flex; align-items: center; min-height: 44px; }
.km-seek-form { margin: 20px 0 8px; }
.km-seek-label { display: block; font-weight: 700; margin-bottom: 6px; }
.km-seek-row { display: flex; gap: 8px; }
.km-seek-input {
  flex: 1 1 auto; min-width: 0; min-height: 48px; padding: 0 16px; font-size: 16px; font-family: var(--km-cjk);
  border: 2px solid var(--km-ink); border-radius: 999px; background: var(--km-surface); color: var(--km-ink);
}
.km-seek-btn { min-height: 48px; padding: 0 20px; border: 0; border-radius: 999px; background: var(--km-accent); color: #fff; font-size: 16px; font-family: var(--km-cjk); cursor: pointer; }
.km-seek-state { color: var(--km-ink-soft); font-size: 15px; }
.km-seek-out { list-style: none; padding: 0; margin: 0; }
.km-seek-hit { border-top: 1px solid var(--km-line); padding: 10px 0; }
.km-seek-hit a { display: inline-flex; align-items: center; min-height: 44px; font-weight: 700; }
.km-seek-hit p { margin: 0; font-size: 15px; color: var(--km-ink-soft); }
.km-lost { padding: 40px 0 20px; }
.km-lost-p { font-size: 17px; max-width: 32em; }
.km-lost-go { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.km-lost-go a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border: 2px solid var(--km-ink); border-radius: 999px; color: var(--km-ink); text-decoration: none; }

/* 页脚 */
.km-foot { border-top: 2px solid var(--km-ink); background: var(--km-surface); }
.km-foot-in { max-width: var(--km-wide); margin: 0 auto; padding: 24px var(--km-gutter) 28px; display: grid; gap: 14px; }
.km-foot-note { margin: 6px 0; font-size: 14px; line-height: 1.7; max-width: 36em; }
.km-foot-note a { display: inline-flex; align-items: center; min-height: 44px; }
.km-foot-links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0 16px; font-size: 14px; }
.km-foot-links a { display: inline-flex; align-items: center; min-height: 44px; color: var(--km-ink); }
.km-foot-year { margin: 0; font-size: 13px; color: var(--km-ink-soft); }
.km-mark-foot { height: 26px; }

/* 手机表格卡片化 */
@media (max-width: 640px) {
  .km-tablewrap.km-cards { border: 0; background: none; overflow: visible; }
  .km-cards .km-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .km-cards .km-table, .km-cards .km-table tbody, .km-cards .km-table tr, .km-cards .km-table td { display: block; width: 100%; }
  .km-cards .km-table tr { background: var(--km-surface); border: 1px solid var(--km-line); border-radius: var(--km-r-small); margin-bottom: 12px; padding: 6px 0; }
  .km-cards .km-table td { border-bottom: 0; padding: 6px 16px; }
  .km-cards .km-table td::before { content: attr(data-km-h); display: block; font-size: 13px; font-weight: 400; color: var(--km-ink-soft); }
}

@media (min-width: 720px) {
  .km-top-in .km-nav { flex: 0 1 auto; }
  .km-nav ul { margin-left: 0; }
  .km-h1-art, .km-h1-list, .km-h1-plain { font-size: 40px; }
  .km-homebody .km-pair { grid-template-columns: 1fr 1fr; }
  .km-pair-shots { grid-template-columns: 1fr 1.25fr; }
  .km-foot-in { grid-template-columns: 1.1fr 1fr; align-items: start; }
  .km-foot-year { grid-column: 1 / -1; }
}

@media (min-width: 1000px) {
  .km-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    grid-template-areas: none;
    column-gap: 56px; padding: 34px 0 28px; align-items: start;
  }
  .km-hero-l, .km-hero-r { display: flex; flex-direction: column; gap: 20px; }
  .km-hero-l > *, .km-hero-r > * { grid-area: auto; }
  .km-hero-h { font-size: 61px; line-height: 1.12; }
  .km-hero-lead { font-size: 17px; }
  .km-gauge { padding: 26px 28px 18px; }
  .km-frames { height: 120px; }
  .km-frame-tall { width: 74px; height: 106px; }
  .km-frame-wide { width: 148px; height: 104px; }
  .km-hero-r .km-card { align-self: stretch; }
  .km-artgrid { grid-template-columns: minmax(0, 1fr) 260px; align-items: start; }
  .km-toc { grid-column: 2; grid-row: 1; position: sticky; top: 16px; }
  .km-article { grid-column: 1; grid-row: 1; }
  .km-h2 { font-size: 27px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}