:root {
  --ink: #1b2421;
  --muted: #4d5b56;
  --paper: #f4f0e6;
  --sheet: #fbf8f2;
  --line: #d9d0c2;
  --rail: #14302e;
  --rail-text: #e7f3f0;
  --teal: #0f6e64;
  --teal-deep: #0b534b;
  --sand: #efe4cf;
  --mark: #c4552a;
}
* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.75;
}
a { color: var(--teal-deep); }
a:hover { color: var(--mark); }
img, svg { display: block; }
.shell { display: grid; grid-template-columns: 252px 1fr; min-height: 100vh; }
.rail {
  background: var(--rail);
  color: var(--rail-text);
  padding: 28px 20px;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 700; letter-spacing: 0.04em; font-size: 22px; }
.brand svg { width: 34px; height: 34px; }
.rail nav { display: flex; flex-direction: column; gap: 6px; }
.rail nav a {
  color: var(--rail-text);
  text-decoration: none;
  padding: 10px 12px;
  border-left: 3px solid transparent;
}
.rail nav a[aria-current="page"] { border-left-color: #f0b429; background: rgba(255,255,255,0.06); color: #fff; }
.rail-note { margin-top: auto; font-size: 13px; color: #b7cdc8; }
.rail-dl { text-align: center; font-size: 15px; line-height: 1.35; padding: 10px 8px; word-break: keep-all; }
.nav-toggle { display: none; }
.main { padding: 0 0 40px; }
.hero {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 28px;
  padding: 42px 48px 28px;
  align-items: start;
}
.kicker { font-family: Georgia, "Songti SC", serif; letter-spacing: 0.12em; text-transform: uppercase; font-size: 12px; color: var(--teal); margin: 0 0 8px; }
h1, h2, h3 { font-family: Georgia, "Songti SC", serif; font-weight: 700; line-height: 1.35; color: #13221f; }
h1 { font-size: 38px; margin: 0 0 14px; }
h2 { font-size: 28px; margin: 0 0 12px; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 16px; }
.download-box {
  background: var(--sheet);
  border: 1px solid var(--line);
  padding: 20px;
  box-shadow: 6px 6px 0 var(--sand);
}
.download-box strong { display: block; font-size: 18px; margin-bottom: 8px; }
.btn {
  display: inline-block;
  background: var(--teal);
  color: #fff;
  text-decoration: none;
  padding: 12px 18px;
  border: 0;
  font-weight: 700;
}
.btn:hover { background: var(--teal-deep); color: #fff; }
.btn-line { display: inline-block; margin-top: 10px; }
.wrap { padding: 8px 48px 20px; max-width: 980px; }
section { padding: 22px 0; border-top: 1px solid var(--line); }
.scene-list { display: grid; grid-template-columns: 1fr; gap: 14px; }
.scene {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 14px;
  background: var(--sheet);
  border: 1px solid var(--line);
  padding: 16px;
}
.scene svg { width: 48px; height: 48px; }
table { width: 100%; border-collapse: collapse; background: var(--sheet); font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
th { background: #e7f0ee; }
.quote-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
blockquote { margin: 0; background: var(--sand); padding: 14px 16px; }
blockquote p { margin: 0; }
.faq details, .faq .qa { background: var(--sheet); border: 1px solid var(--line); padding: 12px 14px; margin: 0 0 10px; }
.faq h3 { font-size: 18px; margin: 0 0 6px; }
.site-footer { margin: 20px 48px 0; padding-top: 16px; border-top: 2px solid var(--rail); color: var(--muted); font-size: 14px; }
.site-footer a { margin-right: 14px; }
@media (max-width: 960px) {
  .shell { grid-template-columns: 1fr; }
  .rail { position: relative; height: auto; gap: 12px; padding: 14px 16px; }
  .rail-note { display: none; }
  .rail nav { display: none; }
  .rail nav.is-open { display: flex; }
  .nav-toggle { display: inline-block; background: transparent; color: #fff; border: 1px solid #fff; padding: 6px 10px; }
  .hero, .wrap, .site-footer { padding-left: 18px; padding-right: 18px; }
  .hero { grid-template-columns: 1fr; }
  .quote-grid { grid-template-columns: 1fr; }
  h1 { font-size: 30px; }
}