/* WPS Office 智能办公导航 · 杂志编辑风 */
:root {
  --paper: #F7F3EA;
  --paper-deep: #EFE6D4;
  --ink: #1A1A1A;
  --clay: #C45C26;
  --mute: #5A5348;
  --rule: #1A1A1A;
  --max: 46rem;
  --wide: 64rem;
}

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

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  font-size: 1.0625rem;
  line-height: 1.85;
}

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

a {
  color: var(--clay);
  text-underline-offset: 0.18em;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 3px;
}

.wrap {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
}

.wrap-narrow {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

/* 刊头 */
.masthead {
  padding: 2.25rem 0 1.5rem;
  text-align: center;
  border-bottom: 1px solid var(--rule);
}

.brand {
  margin: 0 0 1.1rem;
  font-size: 1.35rem;
  letter-spacing: 0.22em;
  font-weight: 700;
}

.brand a {
  color: var(--ink);
  text-decoration: none;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem 2.2rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid transparent;
}

.site-nav a:hover,
.site-nav a.is-current {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* 刊头 Hero */
.hero {
  padding: 3.5rem 0 2.5rem;
}

.kicker {
  margin: 0 0 1rem;
  color: var(--clay);
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.hero h1,
.page-title h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(1.7rem, 3.4vw, 2.55rem);
  line-height: 1.35;
  font-weight: 700;
}

.standfirst {
  margin: 0 0 1.5rem;
  font-size: 1.12rem;
  color: var(--mute);
}

.byline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
  margin: 0;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--mute);
  font-size: 0.88rem;
}

/* 长文 */
.essay,
.section {
  padding: 2.4rem 0;
  border-top: 1px solid var(--rule);
}

.essay h2,
.section h2 {
  margin: 1.7rem 0 1.2rem;
  font-size: 1.45rem;
  line-height: 1.4;
}

.essay h2:first-child,
.section h2:first-child {
  margin-top: 0;
}

.essay h3,
.section h3,
.guide h3 {
  margin: 1.8rem 0 0.7rem;
  font-size: 1.12rem;
}

.essay p,
.section p,
.guide p,
.letters p,
.faq p {
  margin: 0 0 1rem;
}

.dropcap::first-letter {
  float: left;
  margin: 0.12em 0.12em 0 0;
  color: var(--clay);
  font-size: 3.4em;
  line-height: 0.8;
  font-weight: 700;
}

.lede-note {
  margin: 1.4rem 0 0;
  padding: 0.9rem 0 0;
  border-top: 1px solid var(--rule);
  color: var(--mute);
  font-size: 0.95rem;
}

/* 平台马赛克：不等宽，不作三列均分卡片 */
.mosaic {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: 0;
  margin-top: 1.4rem;
  border: 1px solid var(--rule);
}

.mosaic article {
  padding: 1.35rem 1.4rem 1.5rem;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: transparent;
}

.mosaic article:nth-child(2n) {
  border-right: 0;
}

.mosaic article.span-full {
  grid-column: 1 / -1;
  border-right: 0;
  background: var(--paper-deep);
}

.mosaic h3 {
  margin: 0.55rem 0 0.55rem;
  font-size: 1.05rem;
}

.tile-icon {
  width: 28px;
  height: 28px;
  color: var(--clay);
}

/* 单栏随笔 */
.essay-single {
  max-width: var(--max);
}

/* 读者来信 */
.letters {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.letter {
  padding: 1.4rem 0 1.6rem;
  border-top: 1px solid var(--rule);
}

.letter:first-child {
  border-top: 0;
}

.letter-meta {
  margin: 0 0 0.6rem;
  color: var(--mute);
  font-size: 0.88rem;
}

.letter blockquote {
  margin: 0;
  padding: 0 0 0 1rem;
  border-left: 2px solid var(--clay);
}

.quote-mark {
  width: 22px;
  height: 22px;
  margin-bottom: 0.55rem;
  color: var(--clay);
}

/* 数据引文 */
.citations {
  margin: 0;
}

.citations blockquote {
  margin: 0 0 1.4rem;
  padding: 1rem 0 1.1rem;
  border-top: 1px solid var(--rule);
}

.citations blockquote:last-child {
  margin-bottom: 0;
}

.citations p {
  margin: 0 0 0.45rem;
  font-size: 1.15rem;
}

.citations footer {
  color: var(--mute);
  font-size: 0.86rem;
}

/* 清单与细表 */
.checklist {
  margin: 0 0 1.2rem;
  padding: 0;
  list-style: none;
  counter-reset: item;
}

.checklist li {
  position: relative;
  margin: 0;
  padding: 0.95rem 0 0.95rem 2.6rem;
  border-bottom: 1px solid var(--rule);
}

.checklist li::before {
  counter-increment: item;
  content: counter(item, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.95rem;
  color: var(--clay);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.fine-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.4rem;
  font-size: 0.95rem;
}

.fine-table th,
.fine-table td {
  padding: 0.55rem 0.45rem;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}

.fine-table th {
  font-weight: 700;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.mosaic-lead {
  max-width: var(--max);
}

/* FAQ 全部展开 */
.faq-list {
  margin: 0;
}

.faq-item {
  padding: 1.1rem 0;
  border-top: 1px solid var(--rule);
}

.faq-item dt {
  margin: 0 0 0.45rem;
  font-weight: 700;
}

.faq-item dd {
  margin: 0;
}

/* CTA */
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.2rem;
  align-items: center;
  margin: 1.4rem 0 0;
}

.cta {
  display: inline-block;
  padding: 0.65rem 1.2rem;
  background: var(--clay);
  color: var(--paper);
  text-decoration: none;
  border: 1px solid var(--clay);
}

.cta:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.cta-line {
  display: inline-block;
  padding: 0.65rem 0;
  color: var(--ink);
}

/* 页脚 */
.site-footer {
  margin-top: 1rem;
  padding: 2rem 0 2.6rem;
  border-top: 2px solid var(--rule);
  font-size: 0.9rem;
  color: var(--mute);
}

.site-footer p {
  margin: 0 0 0.7rem;
}

.safe-line {
  color: var(--ink);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.4rem;
  margin: 1rem 0 1.1rem;
}

@media (max-width: 760px) {
  .mosaic {
    grid-template-columns: 1fr;
  }

  .mosaic article,
  .mosaic article:nth-child(2n) {
    border-right: 0;
  }

  .hero {
    padding-top: 2.4rem;
  }
}

.stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 2rem;
  align-items: start;
  padding: 1.5rem 0 3rem;
}
.dl-rail {
  position: sticky;
  top: 1.2rem;
  border-left: 1px solid var(--rule);
  padding: 0 0 0 1.2rem;
}
.dl-rail-kicker {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.dl-rail-title {
  margin: 0.2rem 0 0.4rem;
  font-weight: 700;
}
.dl-rail-meta {
  margin: 0 0 0.9rem;
  color: var(--mute);
  font-size: 0.92rem;
}
.dl-rail .cta,
.dl-rail .cta-line {
  display: block;
  text-align: center;
  margin: 0 0 0.55rem;
}
.hero-dl {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0 0 1rem;
}
@media (max-width: 900px) {
  .stage { grid-template-columns: 1fr; }
  .dl-rail { position: static; border-left: 0; border-top: 1px solid var(--rule); padding: 1.2rem 0 0; }
}