:root { color: #23332d; background: #fff; font-family: "PingFang SC", "Microsoft YaHei", sans-serif; }
* { box-sizing: border-box; letter-spacing: 0; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
:focus-visible { outline: 2px solid #a43d33; outline-offset: 4px; }
.skip { position: absolute; left: 14px; top: -80px; z-index: 30; padding: 12px; background: white; }
.skip:focus { top: 10px; }
.site-header { height: 76px; padding: 0 max(5vw, 24px); display: flex; justify-content: space-between; align-items: center; background: white; }
.wordmark { display: inline-flex; align-items: center; gap: 11px; font-weight: 700; font-size: 20px; white-space: nowrap; }
.wordmark small { display: block; font-size: 10px; color: #8c9991; font-weight: 500; }
.seal { width: 34px; height: 34px; display: grid; place-items: center; color: white; background: #a54338; font: bold 22px/1 serif; }
.site-header nav { display: flex; gap: 38px; color: #536059; font-size: 14px; }
.site-header nav a:hover, .header-action:hover, .under-link:hover { color: #a43d33; }
.header-action { font-size: 14px; font-weight: 700; border-bottom: 1px solid #a43d33; padding: 9px 0; }
.hero { position: relative; min-height: min(730px, 76vh); min-height: min(730px, 76svh); background: #18211e url('./assets/hero.png') center center / cover no-repeat; display: flex; align-items: center; color: white; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(11,20,17,.72), rgba(11,20,17,.32) 50%, transparent); }
.hero-content { position: relative; z-index: 1; width: min(600px, 80%); margin-left: max(8vw, 28px); padding: 50px 0 80px; }
.eyebrow { font-size: 13px; color: #9f6256; font-weight: 700; }
.eyebrow.light { color: #e5c1ad; }
h1, h2, p { margin-top: 0; }
h1, h2 { font-family: "Songti SC", "SimSun", serif; font-weight: 600; letter-spacing: 0; }
h1 { font-size: 88px; margin: 26px 0 18px; line-height: 1.1; }
.hero-subtitle { font-size: 30px; font-family: "Songti SC", "SimSun", serif; margin-bottom: 20px; }
.hero-description { max-width: 440px; font-size: 15px; line-height: 2; color: #e1e7df; }
.hero-actions { display: flex; align-items: center; gap: 36px; margin-top: 35px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 28px; min-height: 54px; padding: 0 28px; font-size: 14px; font-weight: 600; white-space: nowrap; }
.button-red { background: #ac4639; color: white; }
.button-red:hover { background: #91392f; }
.text-link { font-size: 14px; border-bottom: 1px solid #d5ded5; padding: 8px 0; }
.hero-index { position: absolute; right: 5vw; bottom: 25px; display: flex; gap: 22px; font-size: 11px; color: #e3e5df; }
.section-wrap { width: min(1180px, 90%); margin-inline: auto; }
.section-number { font-size: 12px; color: #a44538; font-weight: 700; }
.intro { display: grid; grid-template-columns: .32fr .85fr .95fr; gap: 5%; align-items: center; padding-block: 118px; }
.intro .section-number { align-self: start; padding-top: 10px; }
h2 { font-size: 44px; line-height: 1.36; margin: 24px 0 22px; }
.intro-copy > p:not(.eyebrow), .feature-lead > p:not(.eyebrow), .chapters-heading > p { font-size: 15px; line-height: 2; color: #65736a; }
.under-link { display: inline-block; font-size: 14px; font-weight: 700; border-bottom: 1px solid #a43d33; padding: 10px 0; margin-top: 15px; }
.intro-art { min-width: 0; }
.intro-art img { width: 100%; height: auto; object-fit: contain; }
.feature-band { background: #eaf0ec; padding: 100px 0; }
.feature-layout { display: grid; grid-template-columns: .75fr 1.15fr; gap: 8%; align-items: center; }
.feature-lead .eyebrow { margin-top: 60px; }
.feature-visual { min-width: 0; }
.feature-visual img { width: 100%; height: auto; aspect-ratio: 1672 / 941; object-fit: contain; }
.visual-caption { display: block; padding-top: 14px; color: #536059; font-size: 12px; }
.chapters { padding-block: 110px 120px; }
.chapters-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.chapters-heading > p { max-width: 310px; }
.chapter-list { margin-top: 55px; border-top: 1px solid #d8dfda; }
.chapter-list details { border-bottom: 1px solid #d8dfda; }
.chapter-list summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 30px; padding: 26px 8px; font-family: "Songti SC", "SimSun", serif; font-size: 25px; }
.chapter-list summary::-webkit-details-marker { display: none; }
.chapter-no { font: 12px/1 sans-serif; color: #a43d33; min-width: 30px; }
.chapter-arrow { margin-left: auto; color: #a43d33; transition: transform .2s; }
details[open] .chapter-arrow { transform: rotate(45deg); }
.chapter-body { padding: 0 8px 26px 68px; display: flex; align-items: center; justify-content: space-between; gap: 25px; }
.chapter-body p { color: #647269; font-size: 14px; line-height: 1.8; margin: 0; }
.chapter-body a { white-space: nowrap; color: #a43d33; font-size: 13px; }
.closing { background: #203a30; color: white; padding: 90px 0; }
.about { padding-block: 0 90px; }
.about p { color: #65736a; line-height: 2; max-width: 660px; }
.closing .section-number { color: #e3a99b; }
.closing h2 { margin: 26px 0 12px; }
.closing p { color: #cbd8ce; margin-bottom: 30px; }
.footer { min-height: 138px; display: flex; align-items: center; justify-content: space-between; gap: 25px; }
.footer p, .footer a { color: #69786d; font-size: 12px; margin: 0; }
.footer { flex-wrap: wrap; padding-block: 30px; }
.share-area { max-width: 100%; width: 252px; }
.share-area button { font: inherit; font-size: 13px; color: #a43d33; background: none; border: 0; border-bottom: 1px solid currentColor; padding: 8px 0; cursor: pointer; }
.share-area #share-status { min-height: 32px; padding-top: 8px; }
.share-area input { width: 100%; font-size: 12px; padding: 8px; border: 1px solid #69786d; }
@media (max-width: 800px) {
  h1 { font-size: 56px; }
  h2 { font-size: 34px; }
  .hero-subtitle { font-size: 23px; }
  .site-header { height: 64px; }
  .site-header nav { display: none; }
  .wordmark { font-size: 17px; }
  .hero { min-height: 620px; min-height: min(670px, 78svh); background-position: 58% center; }
  .hero-shade { background: linear-gradient(90deg, rgba(10,19,17,.74), rgba(10,19,17,.22)); }
  .hero-content { width: min(480px, 84%); padding: 24px 0 65px; }
  .hero-description { max-width: 320px; }
  .hero-index { display: none; }
  .intro { grid-template-columns: 1fr; gap: 14px; padding-block: 75px; }
  .intro-art { margin-top: 20px; }
  .feature-band { padding: 74px 0; }
  .feature-layout { grid-template-columns: 1fr; gap: 32px; }
  .feature-lead .eyebrow { margin-top: 30px; }
  .chapters { padding-block: 75px; }
  .chapters-heading { display: block; }
  .chapters-heading > p { max-width: 440px; }
  .chapter-body { display: block; }
  .chapter-body a { display: inline-block; margin-top: 15px; }
  .closing { padding: 72px 0; }
  .footer { padding-block: 30px; flex-wrap: wrap; }
}
@media (max-width: 420px) {
  .site-header { padding-inline: 18px; }
  .hero-actions { gap: 20px; }
  .button { min-height: 50px; padding-inline: 18px; gap: 10px; }
  .hero-content { margin-left: 7%; }
  .chapter-list summary { font-size: 21px; gap: 16px; }
  .chapter-body { padding-left: 54px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .chapter-arrow { transition: none; } }