/* RainRoot — 静态版独享视觉：田园手账风（奶油纸底 + 森林绿 + 赤陶点缀 + 衬线标题） */
/* 与原 Fastify/EJS 框架的主题系统完全不同，命名全部语义化、手写，无任何框架痕迹。 */

:root {
  --paper: #faf7f0;
  --paper-2: #f3ecdf;
  --ink: #2c3327;
  --ink-soft: #4a5242;
  --muted: #7a8070;
  --moss: #4a6741;
  --leaf: #6a8f5f;
  --leaf-soft: #e4ecdd;
  --terra: #c96f4a;
  --terra-soft: #f6e3da;
  --sand: #e3d9c4;
  --line: #e6ddc9;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(44, 51, 39, .06), 0 6px 20px rgba(44, 51, 39, .07);
  --font-display: Georgia, 'Times New Roman', 'Songti SC', 'SimSun', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --wrap: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶栏 ---------- */
.site-head {
  position: sticky; top: 0; z-index: 20;
  background: rgba(250, 247, 240, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-head__row { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand__mark { font-size: 22px; }
.brand__name { font-family: var(--font-display); font-size: 22px; font-weight: 700; letter-spacing: .2px; }
.site-nav { display: flex; gap: 22px; margin-left: auto; }
.site-nav a { color: var(--ink-soft); text-decoration: none; font-size: 15px; }
.site-nav a:hover { color: var(--moss); }
.lang-switch {
  padding: 4px 12px; border: 1px solid var(--sand); border-radius: 999px;
  font-size: 13px; color: var(--ink-soft); text-decoration: none; background: #fff;
}
.lang-switch:hover { border-color: var(--moss); color: var(--moss); }

/* ---------- 首屏 hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--paper-2), var(--paper));
  border-bottom: 1px solid var(--line);
  padding: 72px 0 64px;
}
.hero__eyebrow {
  margin: 0 0 8px; font-size: 13px; letter-spacing: 2px; text-transform: uppercase; color: var(--terra);
}
.hero__title {
  margin: 0 0 14px; font-family: var(--font-display); font-size: 46px; line-height: 1.15; font-weight: 700;
}
.hero__sub { max-width: 640px; margin: 0 0 26px; color: var(--ink-soft); font-size: 18px; }
.btn {
  display: inline-block; padding: 12px 24px; border-radius: 999px; text-decoration: none;
  font-size: 15px; font-weight: 600; border: 1px solid transparent;
}
.btn--primary { background: var(--moss); color: #fff; }
.btn--primary:hover { background: #3c5734; }

/* ---------- 区块 ---------- */
.block { padding: 56px 0; }
.block__title {
  margin: 0 0 24px; font-family: var(--font-display); font-size: 28px; font-weight: 700;
}
.muted { color: var(--muted); }

/* 分类卡 */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
.cat-card {
  display: flex; flex-direction: column; gap: 6px; padding: 18px 16px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none; color: var(--ink); transition: transform .15s ease, box-shadow .15s ease;
}
.cat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--sand); }
.cat-card__icon { font-size: 26px; }
.cat-card__name { font-family: var(--font-display); font-weight: 700; font-size: 16px; }
.cat-card__count { font-size: 12px; color: var(--muted); }

/* 指南卡（首页） */
.guide-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 22px; }
.guide-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.guide-card__thumb { display: block; aspect-ratio: 16 / 9; background: var(--leaf-soft); overflow: hidden; }
.guide-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.guide-card__body { padding: 16px 18px 20px; display: flex; flex-direction: column; gap: 8px; }
.guide-card__title { font-family: var(--font-display); font-size: 19px; font-weight: 700; color: var(--ink); text-decoration: none; line-height: 1.3; }
.guide-card__title:hover { color: var(--moss); }
.guide-card__intro { margin: 0; font-size: 14px; color: var(--ink-soft); line-height: 1.55; }

/* ---------- 页面头 ---------- */
.page-head { background: var(--paper-2); border-bottom: 1px solid var(--line); padding: 56px 0; }
.page-head__title { margin: 0 0 10px; font-family: var(--font-display); font-size: 40px; font-weight: 700; }
.page-head__sub { margin: 0; max-width: 680px; color: var(--ink-soft); font-size: 17px; }

/* 分类分组 + 指南列表 */
.cat-group { margin-bottom: 36px; }
.cat-group__title { font-family: var(--font-display); font-size: 22px; font-weight: 700; margin: 0 0 12px; }
.guide-list { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; overflow: hidden; }
.guide-item + .guide-item { border-top: 1px solid var(--line); }
.guide-item a {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 14px 18px; text-decoration: none; color: var(--ink);
}
.guide-item a:hover { background: var(--leaf-soft); }
.guide-item__title { font-weight: 600; }
.guide-item__meta { font-size: 13px; color: var(--muted); white-space: nowrap; }

/* ---------- 文章页 ---------- */
.guide { padding: 40px 0 64px; }
.crumbs { display: flex; gap: 8px; align-items: center; font-size: 14px; color: var(--muted); margin-bottom: 22px; flex-wrap: wrap; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--moss); }
.guide__head { margin-bottom: 32px; }
.guide__cat {
  display: inline-block; padding: 4px 12px; border-radius: 999px; background: var(--terra-soft);
  color: var(--terra); font-size: 13px; font-weight: 600; margin-bottom: 14px;
}
.guide__title { margin: 0 0 12px; font-family: var(--font-display); font-size: 38px; line-height: 1.2; font-weight: 700; }
.guide__meta { margin: 0 0 18px; color: var(--muted); font-size: 14px; }
.guide__intro { margin: 0; font-size: 19px; color: var(--ink-soft); max-width: 760px; }

.guide__layout { display: grid; grid-template-columns: 240px 1fr; gap: 48px; align-items: start; }

.toc { position: sticky; top: 88px; }
.toc__label { margin: 0 0 10px; font-size: 13px; letter-spacing: 1px; text-transform: uppercase; color: var(--muted); }
.toc__list { list-style: none; margin: 0; padding: 0 0 0 2px; border-left: 2px solid var(--line); }
.toc__list li { margin: 0; }
.toc__list a {
  display: block; padding: 6px 14px; color: var(--ink-soft); text-decoration: none; font-size: 14px; line-height: 1.4;
}
.toc__list a:hover { color: var(--moss); background: var(--leaf-soft); }

.guide__content { min-width: 0; }
.sec { margin-bottom: 34px; }
.sec__heading { font-family: var(--font-display); font-size: 24px; font-weight: 700; margin: 0 0 12px; scroll-margin-top: 88px; }
.sec__body { color: var(--ink-soft); }
.sec__body p { margin: 0 0 16px; }

.verdict {
  background: var(--leaf-soft); border: 1px solid #cddcc4; border-left: 4px solid var(--moss);
  border-radius: 10px; padding: 20px 22px; margin-top: 40px;
}
.verdict__label { margin: 0 0 8px; font-size: 13px; letter-spacing: 1px; text-transform: uppercase; color: var(--moss); }
.verdict__text { margin: 0; color: var(--ink); }

.related { margin-top: 56px; padding-top: 40px; border-top: 1px solid var(--line); }
.related__title { font-family: var(--font-display); font-size: 22px; font-weight: 700; margin: 0 0 18px; }
.related__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.related-card {
  display: block; padding: 16px 18px; background: #fff; border: 1px solid var(--line);
  border-radius: 10px; text-decoration: none; color: var(--ink); font-weight: 600; line-height: 1.4;
}
.related-card:hover { border-color: var(--moss); color: var(--moss); }

/* ---------- 页脚 ---------- */
.site-foot { border-top: 1px solid var(--line); background: var(--paper-2); padding: 40px 0; margin-top: 0; }
.site-foot__row { display: flex; flex-direction: column; gap: 12px; }
.site-foot__brand { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 18px; }
.site-foot__nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-foot__nav a { color: var(--ink-soft); text-decoration: none; font-size: 14px; }
.site-foot__nav a:hover { color: var(--moss); }
.site-foot__fine { margin: 0; color: var(--muted); font-size: 13px; }

.prose { max-width: 720px; }

/* ---------- 响应式 ---------- */
@media (max-width: 820px) {
  .hero__title { font-size: 34px; }
  .guide__layout { grid-template-columns: 1fr; }
  .toc { position: static; margin-bottom: 24px; }
  .guide__title { font-size: 30px; }
  .site-head__row { gap: 16px; }
  .site-nav { gap: 14px; }
}