/* ============================================================
   承古开新 · 国学经典分享
   宣纸为底，笔墨为文，朱砂为印
   ============================================================ */

:root {
  --paper: #f7f3ea;
  --paper-deep: #f0e9da;
  --paper-card: #fbf8f1;
  --ink: #2f2a26;
  --ink-soft: #6d635a;
  --ink-faint: #9a8f83;
  --cinnabar: #9e3b2c;
  --cinnabar-deep: #7c2d21;
  --teal: #43606d;
  --gold: #a98548;
  --hairline: #ddd3bf;
  --font-kai: "Kaiti SC", "STKaiti", KaiTi, "楷体", "BiauKai", "DFKai-SB",
    "Noto Serif SC", "Source Han Serif SC", serif;
  --font-song: "Songti SC", "Noto Serif SC", "Source Han Serif SC", SimSun,
    "宋体", serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-song);
  background: var(--paper);
  color: var(--ink);
  line-height: 2;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--cinnabar-deep); text-decoration: none; }
a:hover { color: var(--cinnabar); }

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

.container {
  width: min(1060px, 100% - 48px);
  margin-inline: auto;
}

/* ---------------- 顶部导航 ---------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 243, 234, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 12px;
  flex-wrap: wrap;
}

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

.brand-text {
  font-family: var(--font-kai);
  font-size: 1.45rem;
  letter-spacing: 0.22em;
  font-weight: 700;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.site-nav a {
  font-family: var(--font-kai);
  font-size: 1.02rem;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  padding: 4px 12px;
  border-radius: 3px;
  position: relative;
}

.site-nav a:hover { color: var(--cinnabar); }

.site-nav a.active {
  color: var(--cinnabar-deep);
  font-weight: 700;
}

.site-nav a.active::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 0;
  height: 2px;
  background: var(--cinnabar);
}

/* ---------------- 印章 ---------------- */

.seal {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  place-items: center;
  background: var(--cinnabar);
  color: #fdf6ec;
  font-family: var(--font-kai);
  font-weight: 700;
  border-radius: 4px;
  box-shadow: inset 0 0 0 2px rgba(253, 246, 236, 0.55),
    0 1px 4px rgba(60, 30, 20, 0.25);
  user-select: none;
  flex: none;
}

.seal span { line-height: 1; }

.seal-sm {
  width: 40px;
  height: 40px;
  font-size: 15px;
}

.seal-lg {
  width: 84px;
  height: 84px;
  font-size: 34px;
  grid-template-columns: 1fr;
  box-shadow: inset 0 0 0 3px rgba(253, 246, 236, 0.55),
    0 2px 8px rgba(60, 30, 20, 0.25);
}

/* ---------------- 首页头图 ---------------- */

.hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, var(--paper-deep) 0%, var(--paper) 100%);
  border-bottom: 1px solid var(--hairline);
  text-align: center;
}

.hero-watermark {
  position: absolute;
  right: -40px;
  top: 50%;
  transform: translateY(-52%);
  font-family: var(--font-kai);
  font-size: clamp(220px, 34vw, 400px);
  line-height: 1;
  color: rgba(47, 42, 38, 0.05);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  padding-block: 88px 96px;
}

.hero-side {
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: var(--font-kai);
  letter-spacing: 0.5em;
  color: var(--ink-faint);
  font-size: 0.95rem;
}

.hero-kicker {
  font-family: var(--font-kai);
  letter-spacing: 0.6em;
  text-indent: 0.6em;
  color: var(--gold);
  font-size: 1rem;
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-kai);
  font-size: clamp(56px, 9vw, 96px);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-indent: 0.18em;
  line-height: 1.25;
}

.hero-sub {
  margin-top: 14px;
  font-family: var(--font-kai);
  font-size: clamp(17px, 2.4vw, 21px);
  letter-spacing: 0.34em;
  text-indent: 0.34em;
  color: var(--ink-soft);
}

.hero-rule {
  width: 72px;
  height: 3px;
  background: var(--cinnabar);
  margin: 30px auto 26px;
}

.hero-quote {
  max-width: 640px;
  margin-inline: auto;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.hero-quote .src {
  display: block;
  margin-top: 4px;
  font-size: 0.88rem;
  color: var(--ink-faint);
  letter-spacing: 0.2em;
}

.hero-actions {
  margin-top: 38px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------------- 按钮 ---------------- */

.btn {
  display: inline-block;
  font-family: var(--font-kai);
  font-size: 1.02rem;
  letter-spacing: 0.22em;
  text-indent: 0.22em;
  padding: 10px 30px;
  border-radius: 3px;
  border: 1px solid var(--cinnabar);
  background: var(--cinnabar);
  color: #fdf6ec;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.btn:hover {
  background: var(--cinnabar-deep);
  border-color: var(--cinnabar-deep);
  color: #fdf6ec;
}

.btn-ghost {
  background: transparent;
  color: var(--cinnabar-deep);
}

.btn-ghost:hover {
  background: rgba(158, 59, 44, 0.08);
  color: var(--cinnabar-deep);
}

/* ---------------- 区块 ---------------- */

.section { padding-block: 72px; }

.section-alt {
  background: var(--paper-deep);
  border-block: 1px solid var(--hairline);
}

.sec-title {
  font-family: var(--font-kai);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-indent: 0.3em;
  text-align: center;
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 14px;
}

.sec-title::before,
.sec-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--hairline);
}

.sec-sub {
  text-align: center;
  color: var(--ink-faint);
  letter-spacing: 0.18em;
  font-size: 0.95rem;
  margin-bottom: 44px;
}

/* ---------------- 首页·缘起 ---------------- */

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.intro-text p {
  margin-bottom: 14px;
  text-align: justify;
}

.intro-text p:last-child { margin-bottom: 0; }

.intro-panel {
  background: var(--paper-card);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 44px 30px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}

/* 装裱内衬 */
.intro-panel::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(158, 59, 44, 0.2);
  border-radius: 4px;
  pointer-events: none;
}

/* 竖排字句：自右向左读 */
.motto-row {
  display: flex;
  flex-direction: row-reverse;
  gap: 30px;
  align-items: flex-start;
}

.motto-col {
  writing-mode: vertical-rl;
  font-family: var(--font-kai);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.5em;
  color: var(--ink);
  line-height: 1.15;
}

.motto-col strong { color: var(--cinnabar-deep); }

.seal-mini {
  width: 46px;
  height: 46px;
  font-size: 15px;
  grid-template-columns: 1fr;
}

.motto-seal {
  align-self: flex-end;
  margin-top: 16px;
}

.motto-src {
  margin-top: 28px;
  font-size: 0.85rem;
  color: var(--ink-faint);
  letter-spacing: 0.2em;
}

/* ---------------- 首页·四部经典卡片 ---------------- */

.classic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.classic-card {
  display: block;
  background: var(--paper-card);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 34px 22px 28px;
  text-align: center;
  color: var(--ink);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.classic-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 26px rgba(60, 50, 35, 0.12);
  border-color: rgba(158, 59, 44, 0.45);
  color: var(--ink);
}

.classic-card .seal { margin: 0 auto 20px; }

.classic-card h3 {
  font-family: var(--font-kai);
  font-size: 1.42rem;
  letter-spacing: 0.24em;
  text-indent: 0.24em;
  margin-bottom: 6px;
}

.classic-card .who {
  font-size: 0.86rem;
  color: var(--ink-faint);
  letter-spacing: 0.12em;
  margin-bottom: 14px;
}

.classic-card .line {
  font-size: 0.94rem;
  color: var(--ink-soft);
  line-height: 1.9;
}

/* ---------------- 首页·今日选读 ---------------- */

.daily-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.daily-card {
  background: var(--paper-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--cinnabar);
  border-radius: 0 6px 6px 0;
  padding: 26px 28px;
}

.daily-card .book {
  font-family: var(--font-kai);
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  color: var(--cinnabar-deep);
  margin-bottom: 8px;
}

.daily-card .text {
  font-family: var(--font-kai);
  font-size: 1.16rem;
  line-height: 2;
}

.daily-card .from {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--ink-faint);
  letter-spacing: 0.14em;
}

/* ---------------- 经典内页 ---------------- */

.page-head {
  background: linear-gradient(180deg, var(--paper-deep) 0%, var(--paper) 100%);
  border-bottom: 1px solid var(--hairline);
  padding-block: 44px 52px;
}

.crumbs {
  font-size: 0.9rem;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
  margin-bottom: 26px;
}

.crumbs a { color: var(--ink-soft); }
.crumbs a:hover { color: var(--cinnabar); }

.classic-title-row {
  display: flex;
  align-items: center;
  gap: 24px;
}

.classic-title-row h1 {
  font-family: var(--font-kai);
  font-size: clamp(38px, 6vw, 54px);
  font-weight: 700;
  letter-spacing: 0.2em;
  line-height: 1.3;
}

.classic-tagline {
  margin-top: 6px;
  font-family: var(--font-kai);
  color: var(--ink-soft);
  letter-spacing: 0.3em;
  font-size: 1.05rem;
}

.prose { max-width: 780px; margin-inline: auto; }

.prose p { margin-bottom: 16px; text-align: justify; }
.prose p:last-child { margin-bottom: 0; }

.prose .meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 18px 0 26px;
}

.prose .meta-chip {
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  color: var(--teal);
  border: 1px solid rgba(67, 96, 109, 0.4);
  border-radius: 999px;
  padding: 2px 14px;
  background: rgba(67, 96, 109, 0.06);
}

/* 选读条目 */

.quote-list {
  max-width: 780px;
  margin-inline: auto;
  display: grid;
  gap: 26px;
}

.quote {
  background: var(--paper-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--cinnabar);
  border-radius: 0 6px 6px 0;
  padding: 30px 32px 26px;
}

.quote .chapter {
  display: inline-block;
  font-family: var(--font-kai);
  font-size: 0.92rem;
  letter-spacing: 0.22em;
  color: var(--cinnabar-deep);
  border-bottom: 1px solid rgba(158, 59, 44, 0.35);
  padding-bottom: 4px;
  margin-bottom: 14px;
}

.quote .original {
  font-family: var(--font-kai);
  font-size: 1.22rem;
  line-height: 2.1;
  margin-bottom: 14px;
}

.quote .translation {
  color: var(--ink-soft);
  font-size: 0.97rem;
  line-height: 2;
  text-align: justify;
}

.quote .note {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--hairline);
  color: var(--ink-faint);
  font-size: 0.88rem;
}

/* 名句撷英 */

.aphorisms {
  list-style: none;
  max-width: 780px;
  margin-inline: auto;
  display: grid;
  gap: 14px;
}

.aphorisms li {
  background: var(--paper-card);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 16px 24px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.aphorisms li p {
  font-family: var(--font-kai);
  font-size: 1.1rem;
}

.aphorisms li span {
  font-size: 0.84rem;
  color: var(--ink-faint);
  letter-spacing: 0.12em;
  white-space: nowrap;
}

/* 上/下一篇 */

.pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-block: 26px 60px;
  flex-wrap: wrap;
}

.pager a {
  font-family: var(--font-kai);
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  border: 1px solid var(--hairline);
  background: var(--paper-card);
  border-radius: 4px;
  padding: 10px 22px;
  transition: border-color 0.2s, color 0.2s;
}

.pager a:hover {
  border-color: var(--cinnabar);
  color: var(--cinnabar-deep);
}

/* ---------------- 关于页 ---------------- */

.about-block { margin-bottom: 30px; }

.about-block h2 {
  font-family: var(--font-kai);
  font-size: 1.35rem;
  letter-spacing: 0.22em;
  color: var(--cinnabar-deep);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.about-block h2::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--cinnabar);
  transform: rotate(45deg);
  flex: none;
}

.about-block p { text-align: justify; margin-bottom: 12px; }
.about-block p:last-child { margin-bottom: 0; }

/* ---------------- 页脚 ---------------- */

.site-footer {
  background: var(--ink);
  color: rgba(247, 243, 234, 0.85);
  margin-top: 40px;
}

.footer-row {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-block: 52px 40px;
}

.footer-brand .seal { margin-bottom: 16px; }

.footer-brand h2 {
  font-family: var(--font-kai);
  font-size: 1.4rem;
  letter-spacing: 0.3em;
  margin-bottom: 10px;
  color: var(--paper);
}

.footer-brand p {
  font-size: 0.92rem;
  color: rgba(247, 243, 234, 0.62);
  line-height: 1.9;
}

.footer-col h3 {
  font-family: var(--font-kai);
  font-size: 1rem;
  letter-spacing: 0.3em;
  color: rgba(247, 243, 234, 0.9);
  margin-bottom: 16px;
}

.footer-col ul { list-style: none; }

.footer-col li { margin-bottom: 8px; }

.footer-col a {
  color: rgba(247, 243, 234, 0.62);
  font-size: 0.94rem;
  letter-spacing: 0.1em;
}

.footer-col a:hover { color: var(--paper); }

.footer-col .plain {
  color: rgba(247, 243, 234, 0.62);
  font-size: 0.94rem;
  letter-spacing: 0.06em;
}

.footer-bottom {
  border-top: 1px solid rgba(247, 243, 234, 0.14);
  padding-block: 20px;
  text-align: center;
  font-size: 0.86rem;
  color: rgba(247, 243, 234, 0.5);
  letter-spacing: 0.1em;
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 900px) {
  .classic-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-row { grid-template-columns: 1fr 1fr; }
  .hero-side { display: none; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .intro-grid, .daily-grid { grid-template-columns: 1fr; }
  .classic-grid { grid-template-columns: 1fr; }
  .footer-row { grid-template-columns: 1fr; gap: 28px; }
  .hero-inner { padding-block: 60px 68px; }
  .section { padding-block: 54px; }
  .quote { padding: 24px 22px 20px; }
  .nav-row { justify-content: center; }
}