:root {
  --gv-paper: #fff4d6;
  --gv-ink: #2b2118;
  --gv-teal: #00727a;
  --gv-teal-dk: #005a60;
  --gv-wheat: #e8a33d;
  --gv-wheat-tint: #fbe6b6;
  --gv-line: #f1dfa8;
  --gv-sub: #fffbee;
  --gv-muted: #5e4f3f;
  --gv-r: 3px;
  --gv-r0: 0;
  --gv-cjk: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --gv-latin: Gadugi, Ebrima, "Segoe UI", sans-serif;
  --gv-wrap: 1120px;
}

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

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

body.gv-body {
  margin: 0;
  background: var(--gv-paper);
  color: var(--gv-ink);
  font-family: var(--gv-cjk);
  font-size: 17px;
  line-height: 1.8;
}

.gv-lat { font-family: var(--gv-latin); }

a { color: var(--gv-teal); text-underline-offset: 3px; }
a:hover { color: var(--gv-teal-dk); }

:focus-visible { outline: 3px solid var(--gv-teal); outline-offset: 2px; }

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

code {
  font-family: var(--gv-latin);
  background: var(--gv-sub);
  border: 1px solid var(--gv-line);
  border-radius: var(--gv-r);
  padding: 0 4px;
  font-size: .92em;
  overflow-wrap: anywhere;
}

.gv-skip {
  position: absolute;
  left: 8px;
  top: -60px;
  z-index: 10;
  background: var(--gv-ink);
  color: var(--gv-paper);
  padding: 10px 14px;
  min-height: 44px;
}
.gv-skip:focus { top: 8px; color: var(--gv-paper); }

/* ---------- 页头 ---------- */
.gv-top { border-bottom: 2px solid var(--gv-ink); background: var(--gv-paper); }
.gv-top__in {
  max-width: var(--gv-wrap);
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 64px;
}
.gv-brand { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; }
.gv-mark { display: block; width: 116px; height: auto; }
.gv-mark__word { font-family: var(--gv-latin); font-size: 26px; font-weight: 700; fill: var(--gv-ink); }
.gv-nav__list { list-style: none; margin: 0; padding: 0; display: flex; gap: 2px; }
.gv-nav__a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  color: var(--gv-ink);
  text-decoration: none;
  font-size: 16px;
  border-bottom: 3px solid transparent;
}
.gv-nav__a:hover { color: var(--gv-teal); }
.gv-nav__a.is-on { border-bottom-color: var(--gv-teal); color: var(--gv-teal); }

.gv-main { display: block; }

/* ---------- 首页首屏:对开门 ---------- */
.gv-gate { max-width: var(--gv-wrap); margin: 0 auto; padding: 26px 16px 8px; }
.gv-h1 {
  margin: 0;
  font-size: 45px;
  line-height: 1.22;
  font-weight: 700;
  line-break: strict;
}
.gv-nb { display: inline-block; }
.gv-gate__lede { margin: 10px 0 0; max-width: 48em; color: var(--gv-muted); font-size: 17px; line-height: 1.7; }

.gv-rec {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 18px;
  align-items: baseline;
  margin: 16px 0 18px;
  padding: 10px 0;
  border-top: 1px solid var(--gv-ink);
  border-bottom: 1px solid var(--gv-ink);
  color: var(--gv-ink);
  text-decoration: none;
}
.gv-rec__k { grid-row: 1 / span 2; color: var(--gv-teal); font-size: 14px; font-weight: 700; }
.gv-rec__t { font-size: 18px; font-weight: 700; text-decoration: underline; text-decoration-color: var(--gv-wheat); text-decoration-thickness: 3px; text-underline-offset: 5px; }
.gv-rec__d { font-size: 14px; color: var(--gv-muted); line-height: 1.6; }
.gv-rec:hover .gv-rec__t { color: var(--gv-teal); }

.gv-doors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 2px solid var(--gv-ink);
  border-radius: var(--gv-r0);
  background: var(--gv-ink);
  gap: 3px;
}
.gv-door { position: relative; padding: 20px 26px 22px; display: flex; flex-direction: column; }
.gv-door--self { background: var(--gv-sub); padding-right: 40px; }
.gv-door--firm { background: var(--gv-wheat-tint); padding-left: 40px; }
.gv-door--self::after, .gv-door--firm::before {
  content: "";
  position: absolute;
  top: calc(50% - 24px);
  width: 6px;
  height: 48px;
  border-radius: 3px;
}
.gv-door--self::after { right: 14px; background: var(--gv-teal); }
.gv-door--firm::before { left: 14px; background: var(--gv-ink); }
.gv-door__t { margin: 0 0 6px; font-size: 26px; line-height: 1.3; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.gv-door__tag { font-size: 13px; font-weight: 700; padding: 2px 8px; border-radius: var(--gv-r); line-height: 1.6; }
.gv-door--self .gv-door__tag { background: var(--gv-teal); color: #fff; }
.gv-door--firm .gv-door__tag { background: var(--gv-ink); color: var(--gv-paper); }
.gv-door__p { margin: 0 0 12px; font-size: 16px; line-height: 1.7; }
.gv-door__facts { margin: 0 0 12px; padding: 0; list-style: none; font-size: 15px; line-height: 1.7; }
.gv-door__facts li { padding: 6px 0 6px 16px; border-top: 1px dashed rgba(43, 33, 24, .35); position: relative; }
.gv-door__facts li::before { content: ""; position: absolute; left: 0; top: 17px; width: 7px; height: 2px; background: var(--gv-ink); }
.gv-door__more { margin: auto 0 0; }
.gv-door__more a { display: inline-flex; align-items: center; min-height: 44px; font-weight: 700; }
.gv-door__go { margin: 12px 0 4px; }

/* ---------- 邀请码卡 ---------- */
.gv-slip {
  margin-top: auto;
  background: #fff;
  border: 1px solid var(--gv-ink);
  border-radius: var(--gv-r);
  padding: 14px 16px 12px;
  box-shadow: 4px 4px 0 var(--gv-teal);
}
.gv-slip__label { margin: 0 0 6px; font-size: 14px; color: var(--gv-muted); line-height: 1.5; }
.gv-slip__row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.gv-slip__code {
  background: none;
  border: 0;
  padding: 0;
  font-size: 34px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--gv-ink);
  line-height: 1.2;
}
.gv-copy {
  min-height: 44px;
  min-width: 88px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  background: var(--gv-teal);
  color: #fff;
  font: 700 16px/1 var(--gv-cjk);
  cursor: pointer;
}
.gv-copy:hover { background: var(--gv-teal-dk); }
.gv-copy.is-done { background: var(--gv-ink); }
.gv-slip__gain { margin: 8px 0 4px; font-size: 16px; font-weight: 700; line-height: 1.6; }
.gv-slip__star { text-decoration: none; padding: 0 2px; }
.gv-slip__fn { margin: 6px 0 0; font-size: 13px; line-height: 1.6; color: var(--gv-muted); }
.gv-slip__go {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  margin: 10px 0 6px;
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--gv-wheat);
  color: var(--gv-ink);
  font-weight: 700;
  text-decoration: none;
  border: 2px solid var(--gv-ink);
}
.gv-slip__go:hover { background: #f0b552; color: var(--gv-ink); }
.gv-slip__note { margin: 0; font-size: 13px; line-height: 1.6; color: var(--gv-muted); }
.gv-slip--doc { margin: 26px 0; padding: 18px 20px 14px; box-shadow: 6px 6px 0 var(--gv-wheat); }

/* ---------- 首页下方 ---------- */
.gv-home { max-width: var(--gv-wrap); margin: 0 auto; padding: 18px 16px 48px; }
.gv-home > h2, .gv-home__h2 {
  font-size: 24px;
  line-height: 1.4;
  margin: 34px 0 10px;
  max-width: 34em;
}
.gv-home > h2::before, .gv-home__h2::before {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  background: var(--gv-teal);
  margin-bottom: 12px;
}
.gv-home > p { max-width: 38em; margin: 0 0 14px; }
.gv-home__all a { display: inline-flex; align-items: center; min-height: 44px; font-weight: 700; }

/* ---------- 列表 ---------- */
.gv-rows { list-style: none; margin: 0; padding: 0; max-width: 46em; }
.gv-row { padding: 16px 0; border-top: 1px solid var(--gv-ink); }
.gv-row:last-child { border-bottom: 1px solid var(--gv-ink); }
.gv-row__a { font-size: 20px; font-weight: 700; line-height: 1.5; color: var(--gv-ink); text-decoration-color: var(--gv-wheat); text-decoration-thickness: 3px; }
.gv-row__a:hover { color: var(--gv-teal); }
.gv-row__d { margin: 6px 0 2px; font-size: 16px; line-height: 1.7; }
.gv-row__m { margin: 0; font-size: 14px; color: var(--gv-muted); }

.gv-shelf, .gv-find, .gv-lost, .gv-plain { max-width: 760px; margin: 0 auto; padding: 12px 16px 56px; }
.gv-shelf__intro { max-width: 38em; }
.gv-shelf__n { font-size: 14px; color: var(--gv-muted); margin: 20px 0 6px; }
.gv-pager { display: flex; gap: 16px; align-items: center; margin-top: 18px; flex-wrap: wrap; }
.gv-pager__a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px; border: 1px solid var(--gv-ink); border-radius: 999px; text-decoration: none; }
.gv-pager__n { font-size: 14px; color: var(--gv-muted); }

/* ---------- 面包屑 ---------- */
.gv-crumbs__list { list-style: none; margin: 0; padding: 0; font-size: 14px; line-height: 1.6; color: var(--gv-muted); }
.gv-crumbs__list li { display: inline; }
.gv-crumbs__list li + li::before { content: "/"; margin: 0 8px; color: var(--gv-wheat); font-weight: 700; }
.gv-crumbs__list a { display: inline-flex; align-items: center; min-height: 44px; vertical-align: middle; color: var(--gv-muted); }

/* ---------- 文章 ---------- */
.gv-doc { max-width: 760px; margin: 0 auto; padding: 8px 16px 56px; }
.gv-doc__h1, .gv-plain__h1 {
  font-size: 36px;
  text-wrap: pretty;
  line-height: 1.32;
  margin: 6px 0 12px;
  line-break: strict;
}
.gv-doc__dek { font-size: 18px; line-height: 1.7; color: var(--gv-muted); margin: 0 0 12px; }
.gv-doc__meta, .gv-plain__dt { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0 0 18px; font-size: 14px; color: var(--gv-muted); }
.gv-doc__by { padding-right: 18px; border-right: 1px solid var(--gv-line); }
.gv-cover { margin: 0 0 22px; border: 2px solid var(--gv-ink); background: var(--gv-sub); }
.gv-cover img { display: block; width: 100%; }
.gv-cover__cap { font-size: 14px; color: var(--gv-muted); padding: 8px 12px; border-top: 1px solid var(--gv-ink); line-height: 1.6; }

.gv-toc { border: 2px solid var(--gv-ink); background: var(--gv-sub); padding: 14px 18px 10px; margin: 0 0 30px; }
.gv-toc__t { margin: 0 0 6px; font-weight: 700; font-size: 15px; }
.gv-toc__list { margin: 0; padding: 0 0 0 1.6em; }
.gv-toc__i { padding: 3px 0; line-height: 1.6; font-size: 16px; }
.gv-toc__i a { display: inline; color: var(--gv-ink); }
.gv-toc__i a:hover { color: var(--gv-teal); }
.gv-toc__s { display: inline-block; margin-left: 8px; font-size: 12px; padding: 0 6px; line-height: 1.7; border: 1px solid var(--gv-ink); border-radius: var(--gv-r); vertical-align: 1px; }

.gv-prose { max-width: 38em; }
.gv-prose p { margin: 0 0 16px; }
.gv-prose h2, .gv-faq__t {
  line-break: strict;
  font-size: 26px;
  line-height: 1.4;
  margin: 44px 0 8px;
  padding-top: 18px;
  border-top: 2px solid var(--gv-ink);
  scroll-margin-top: 12px;
}
.gv-prose h3 { font-size: 20px; margin: 28px 0 8px; line-height: 1.5; }
.gv-prose ul, .gv-prose ol { padding-left: 1.4em; margin: 0 0 16px; }
.gv-prose li { margin: 0 0 8px; }
.gv-prose strong { font-weight: 700; background: linear-gradient(transparent 62%, var(--gv-line) 62%); }

.gv-scope { display: flex; align-items: center; gap: 8px; margin: 0 0 16px; font-size: 13px; }
.gv-scope__k { color: var(--gv-muted); }
.gv-scope__v { padding: 1px 10px; border-radius: var(--gv-r); font-weight: 700; border: 1px solid var(--gv-ink); }
.gv-scope--self .gv-scope__v { background: var(--gv-teal); color: #fff; border-color: var(--gv-teal); }
.gv-scope--firm .gv-scope__v { background: var(--gv-wheat); color: var(--gv-ink); }
.gv-scope--both .gv-scope__v { background: transparent; }

.gv-shot { margin: 8px 0 24px; padding: 10px; background: var(--gv-sub); border: 1px solid var(--gv-ink); }
.gv-shot img { display: block; margin: 0 auto; }
.gv-shot--tall img { max-width: 360px; width: 100%; }
.gv-shot__cap { margin-top: 8px; font-size: 14px; line-height: 1.6; color: var(--gv-muted); }

.gv-tbl { overflow-x: auto; margin: 0 0 22px; border: 1px solid var(--gv-ink); }
.gv-tbl table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 15px; line-height: 1.6; }
.gv-tbl th, .gv-tbl td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--gv-line); vertical-align: top; }
.gv-tbl th { background: var(--gv-ink); color: var(--gv-paper); font-weight: 700; }
.gv-tbl tr:last-child td { border-bottom: 0; }

.gv-faq { max-width: 38em; margin-top: 8px; }
.gv-qa { padding: 4px 0 4px 16px; border-left: 4px solid var(--gv-wheat); margin: 0 0 18px; }
.gv-qa__q { font-size: 18px; line-height: 1.55; margin: 0 0 6px; }
.gv-qa__a { margin: 0; }

.gv-next { margin-top: 40px; padding-top: 18px; border-top: 2px solid var(--gv-ink); display: grid; gap: 18px; }
.gv-next__k { margin: 0 0 8px; font-weight: 700; font-size: 15px; }
.gv-chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
a.gv-chip { min-height: 44px; }
.gv-chip { display: inline-flex; align-items: center; min-height: 32px; padding: 0 12px; border: 1px solid var(--gv-ink); border-radius: 999px; font-size: 14px; background: var(--gv-sub); }
.gv-next__list { margin: 0; padding-left: 1.2em; }
.gv-next__list a { display: inline-flex; align-items: center; min-height: 44px; }

.gv-fine { font-size: 13px; color: var(--gv-muted); }

/* ---------- 搜索 / 404 ---------- */
.gv-find__lb { display: block; font-weight: 700; margin: 16px 0 6px; }
.gv-find__row { display: flex; gap: 8px; flex-wrap: wrap; }
.gv-find__in { flex: 1 1 220px; min-height: 46px; padding: 0 12px; font: 16px var(--gv-cjk); border: 2px solid var(--gv-ink); border-radius: var(--gv-r); background: #fff; color: var(--gv-ink); }
.gv-find__btn { min-height: 46px; padding: 0 20px; border: 0; border-radius: 999px; background: var(--gv-teal); color: #fff; font: 700 16px var(--gv-cjk); cursor: pointer; }
.gv-find__st { color: var(--gv-muted); font-size: 15px; }
.gv-find__res { padding-left: 1.4em; }
.gv-find__res li { margin: 0 0 14px; }
.gv-find__res a { font-weight: 700; display: inline-flex; min-height: 44px; align-items: center; }
.gv-find__res p { margin: 0; font-size: 15px; color: var(--gv-muted); }
.gv-lost__code { font-size: 64px; font-weight: 700; margin: 10px 0 0; color: var(--gv-teal); line-height: 1; }
.gv-lost__list a { display: inline-flex; align-items: center; min-height: 44px; }

/* ---------- 页脚 ---------- */
.gv-foot { background: var(--gv-ink); color: var(--gv-paper); margin-top: 24px; }
.gv-foot a { color: var(--gv-paper); }
.gv-foot a:hover { color: var(--gv-wheat); }
.gv-foot :focus-visible { outline-color: var(--gv-wheat); }
.gv-foot__in { max-width: var(--gv-wrap); margin: 0 auto; padding: 28px 16px 24px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 10px 40px; }
.gv-foot .gv-mark__word { fill: var(--gv-paper); }
.gv-foot__say { margin: 8px 0 0; font-size: 14px; line-height: 1.7; max-width: 34em; }
.gv-foot__say a { display: inline-block; padding: 12px 2px; margin: -12px 0; }
.gv-foot__list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.gv-foot__list a { display: inline-flex; align-items: center; min-height: 44px; font-size: 15px; }
.gv-foot__rss, .gv-foot__yr { grid-column: 1 / -1; margin: 0; font-size: 14px; }
.gv-foot__rss a { display: inline-flex; align-items: center; min-height: 44px; }
.gv-foot__yr { color: #d8c9a3; }

/* ---------- 窄屏 ---------- */
@media (max-width: 760px) {
  body.gv-body { font-size: 16px; }
  .gv-top__in { min-height: 56px; padding: 0 12px 0 16px; }
  .gv-mark { width: 96px; }
  .gv-nav__a { padding: 0 9px; font-size: 15px; }
  .gv-gate { padding-top: 16px; }
  .gv-h1 { font-size: 29px; line-height: 1.3; }
  .gv-gate__lede { font-size: 15px; line-height: 1.65; margin-top: 6px; }
  .gv-rec { margin: 10px 0 12px; padding: 7px 0; gap: 2px 0; grid-template-columns: 1fr; }
  .gv-rec__k { grid-row: auto; font-size: 13px; }
  .gv-rec__t { font-size: 16px; line-height: 1.5; }
  .gv-rec__d { display: none; }
  .gv-doors { grid-template-columns: 1fr; }
  .gv-door { padding: 14px 16px 16px; }
  .gv-door--self { padding-right: 16px; }
  .gv-door--firm { padding-left: 16px; }
  .gv-door--self::after, .gv-door--firm::before { display: none; }
  .gv-door__t { font-size: 22px; margin-bottom: 4px; }
  .gv-door__p { font-size: 15px; margin-bottom: 10px; }
  .gv-slip { padding: 10px 12px 10px; }
  .gv-slip__code { font-size: 28px; }
  .gv-slip__gain { margin-top: 6px; font-size: 15px; }
  .gv-doc__h1, .gv-plain__h1 { font-size: 27px; }
  .gv-prose h2, .gv-faq__t { font-size: 21px; margin-top: 36px; }
  .gv-foot__in { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: no-preference) {
  .gv-copy, .gv-slip__go, .gv-nav__a { transition: background-color .15s ease, color .15s ease, border-color .15s ease; }
}