/* ============================================================
   Heylep 单一自适应主题 · 设计系统
   一套 CSS 覆盖 PC / 平板 / 手机，取代原 PC、Mobile 两套独立主题。
   变量同时被 tools 插件复用，保证两个插件视觉一致。
   ============================================================ */

:root {
  --hl-bg: #f7f8f5;
  --hl-surface: #ffffff;
  --hl-surface-alt: #f0f3ee;
  --hl-ink: #18211c;
  --hl-muted: #5d6b63;
  --hl-line: #e1e6df;
  --hl-accent: #16553d;
  --hl-accent-soft: #e9f2ec;
  --hl-accent-ink: #ffffff;
  --hl-warm: #c2643a;
  --hl-warm-soft: #fbf0e9;
  --hl-radius: 14px;
  --hl-radius-sm: 9px;
  --hl-max: 1120px;
  --hl-shadow: 0 1px 2px rgba(24, 33, 28, .05), 0 10px 30px rgba(24, 33, 28, .04);
  --hl-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --hl-serif: "Iowan Old Style", "Palatino Linotype", Georgia, "Times New Roman", serif;
}

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

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

body.hl-body {
  margin: 0;
  background: var(--hl-bg);
  color: var(--hl-ink);
  font-family: var(--hl-font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--hl-accent); text-decoration: none; }
a:hover { color: var(--hl-warm); }
img { max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, p, ul, ol, figure { margin: 0; }
ul, ol { padding-left: 1.25rem; }

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

.hl-visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.hl-wrap { width: 100%; max-width: var(--hl-max); margin: 0 auto; padding: 0 24px; }
.hl-skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--hl-accent); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.hl-skip:focus { left: 0; }

/* ---------------- 通用排版 ---------------- */
.hl-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: var(--hl-accent); margin-bottom: 14px;
}
.hl-eyebrow::before { content: ""; width: 18px; height: 2px; background: var(--hl-warm); }
.hl-serif { font-family: var(--hl-serif); font-weight: 400; letter-spacing: -.02em; }
.hl-section { padding: 72px 0; }
.hl-section-alt { background: var(--hl-surface-alt); }
.hl-section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 24px; flex-wrap: wrap; margin-bottom: 32px;
}
.hl-section-title { font: 400 clamp(26px, 3.4vw, 38px)/1.2 var(--hl-serif); letter-spacing: -.02em; }
.hl-section-desc { color: var(--hl-muted); max-width: 620px; margin-top: 10px; font-size: 15px; }
.hl-link-more { font-size: 14px; font-weight: 600; white-space: nowrap; }
.hl-link-more::after { content: " →"; }

.hl-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 20px; border-radius: var(--hl-radius-sm);
  border: 1px solid transparent; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: background-color .18s, color .18s, border-color .18s, transform .18s;
}
.hl-btn-primary { background: var(--hl-accent); color: var(--hl-accent-ink); }
.hl-btn-primary:hover { background: #0f3f2d; color: #fff; transform: translateY(-1px); }
.hl-btn-ghost { background: transparent; color: var(--hl-accent); border-color: var(--hl-line); }
.hl-btn-ghost:hover { border-color: var(--hl-accent); background: var(--hl-surface); }
.hl-btn-warm { background: var(--hl-warm); color: #fff; }
.hl-btn-warm:hover { background: #a9512d; color: #fff; }
.hl-btn-sm { min-height: 34px; padding: 6px 14px; font-size: 13px; }

.hl-chip, .hl-tag {
  display: inline-flex; align-items: center; padding: 4px 11px;
  border: 1px solid var(--hl-line); border-radius: 999px;
  background: var(--hl-surface); color: var(--hl-muted); font-size: 12px;
}
.hl-chip:hover, .hl-tag:hover { border-color: var(--hl-accent); color: var(--hl-accent); }

/* ---------------- 顶部导航 ---------------- */
.hl-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--hl-line);
  backdrop-filter: saturate(160%) blur(10px);
}
.hl-header-inner { display: flex; align-items: center; gap: 20px; min-height: 68px; }
.hl-logo { display: inline-flex; align-items: center; gap: 10px; color: var(--hl-ink); font-weight: 700; font-size: 19px; letter-spacing: -.03em; flex: none; }
.hl-logo:hover { color: var(--hl-ink); }
.hl-logo-mark {
  display: grid; place-items: center; width: 32px; height: 32px;
  border-radius: 9px; background: var(--hl-accent); color: #fff;
  font: 600 18px/1 var(--hl-serif);
}
.hl-nav { display: flex; align-items: center; gap: 4px; margin-left: 16px; flex: 1 1 auto; min-width: 0; }
.hl-nav-link {
  display: inline-block; padding: 8px 11px; border-radius: 8px;
  color: var(--hl-muted); font-size: 14px; font-weight: 500; white-space: nowrap;
}
.hl-nav-link:hover, .hl-nav-link.is-current { color: var(--hl-accent); background: var(--hl-accent-soft); }
.hl-nav-link.is-tool { color: var(--hl-warm); }
.hl-nav-link.is-tool:hover { background: var(--hl-warm-soft); color: var(--hl-warm); }
.hl-header-actions { display: flex; align-items: center; gap: 10px; flex: none; }
.hl-search { position: relative; display: flex; align-items: center; }
.hl-search-input {
  width: 168px; height: 36px; padding: 0 12px 0 34px;
  border: 1px solid var(--hl-line); border-radius: 999px;
  background: var(--hl-bg); font-size: 13px; outline: none;
}
.hl-search-input:focus { border-color: var(--hl-accent); background: #fff; }
.hl-search svg { position: absolute; left: 12px; color: var(--hl-muted); pointer-events: none; }
/* 前台仅英文：不保留语言切换器样式 */
.hl-menu-toggle {
  display: none; width: 40px; height: 40px; border: 1px solid var(--hl-line);
  border-radius: 9px; background: #fff; cursor: pointer; padding: 0;
}
.hl-menu-toggle span { display: block; width: 18px; height: 2px; margin: 4px auto; background: var(--hl-ink); border-radius: 2px; }

/* ---------------- 首屏 ---------------- */
.hl-hero { padding: 88px 0 76px; border-bottom: 1px solid var(--hl-line); background: var(--hl-surface); }
.hl-hero-inner { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 56px; align-items: center; }
.hl-hero-title { font: 400 clamp(38px, 5.6vw, 64px)/1.08 var(--hl-serif); letter-spacing: -.035em; }
.hl-hero-title em { font-style: normal; color: var(--hl-accent); }
.hl-lede { margin-top: 20px; max-width: 560px; color: var(--hl-muted); font-size: 17px; line-height: 1.75; }
.hl-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hl-hero-note { margin-top: 18px; font-size: 13px; color: var(--hl-muted); }
.hl-hero-aside {
  border: 1px solid var(--hl-line); border-radius: var(--hl-radius);
  background: var(--hl-bg); padding: 26px;
}
.hl-hero-aside-title { font: 400 19px/1.3 var(--hl-serif); margin-bottom: 18px; }
.hl-hero-aside-row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 12px 0; border-top: 1px solid var(--hl-line); font-size: 14px; }
.hl-hero-aside-row:first-of-type { border-top: 0; }
.hl-hero-aside-row span:last-child { font-family: var(--hl-serif); font-size: 20px; color: var(--hl-accent); }
.hl-hero-aside-foot { margin-top: 16px; font-size: 12px; color: var(--hl-muted); }

/* ---------------- 卡片与网格 ---------------- */
.hl-grid { display: grid; gap: 20px; }
.hl-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.hl-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.hl-card {
  display: flex; flex-direction: column; min-height: 100%;
  padding: 24px; border: 1px solid var(--hl-line); border-radius: var(--hl-radius);
  background: var(--hl-surface); transition: border-color .18s, transform .18s, box-shadow .18s;
}
.hl-card:hover { border-color: var(--hl-accent); transform: translateY(-2px); box-shadow: var(--hl-shadow); }
.hl-card-tag { font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--hl-warm); }
.hl-card-title { margin-top: 12px; font: 400 21px/1.3 var(--hl-serif); letter-spacing: -.01em; }
.hl-card-title a { color: var(--hl-ink); }
.hl-card-title a:hover { color: var(--hl-accent); }
.hl-card-desc { margin-top: 10px; color: var(--hl-muted); font-size: 14px; line-height: 1.65; flex: 1 1 auto; }
.hl-card-meta { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--hl-line); color: var(--hl-muted); font-size: 12px; display: flex; gap: 14px; flex-wrap: wrap; }
.hl-pillar-index { font: 400 32px/1 var(--hl-serif); color: var(--hl-accent-soft); }

/* ---------------- 工具入口卡 ---------------- */
.hl-tool {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  gap: 0; overflow: hidden; border: 1px solid var(--hl-line);
  border-radius: var(--hl-radius); background: var(--hl-surface);
  color: var(--hl-ink); transition: border-color .18s, transform .18s, box-shadow .18s;
}
.hl-tool:hover { border-color: var(--hl-accent); transform: translateY(-2px); box-shadow: var(--hl-shadow); color: var(--hl-ink); }
.hl-tool-copy { padding: 34px; }
.hl-tool-badge {
  display: inline-flex; align-items: center; gap: 7px; padding: 4px 11px;
  border-radius: 999px; background: var(--hl-warm-soft); color: var(--hl-warm);
  font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
}
.hl-tool-title { margin-top: 16px; font: 400 clamp(24px, 3vw, 32px)/1.2 var(--hl-serif); letter-spacing: -.02em; }
.hl-tool-desc { margin-top: 12px; color: var(--hl-muted); font-size: 15px; max-width: 460px; }
.hl-tool-cta { display: inline-flex; align-items: center; gap: 8px; margin-top: 24px; font-size: 14px; font-weight: 700; color: var(--hl-accent); }
.hl-tool-cta::after { content: "→"; transition: transform .18s; }
.hl-tool:hover .hl-tool-cta::after { transform: translateX(4px); }
.hl-tool-note { margin-top: 14px; font-size: 12px; color: var(--hl-muted); }
.hl-tool-visual { background: var(--hl-accent-soft); padding: 28px; display: grid; align-content: center; gap: 10px; }
.hl-tool-demo { background: #fff; border: 1px solid var(--hl-line); border-radius: var(--hl-radius-sm); padding: 14px 16px; }
.hl-tool-demo-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 7px 0; font-size: 13px; color: var(--hl-muted); }
.hl-tool-demo-row + .hl-tool-demo-row { border-top: 1px solid var(--hl-line); }
.hl-tool-demo-row strong { font: 400 17px/1.2 var(--hl-serif); color: var(--hl-ink); }
.hl-tool-demo-row.is-result { background: var(--hl-bg); margin: 8px -16px -14px; padding: 14px 16px; border-radius: 0 0 var(--hl-radius-sm) var(--hl-radius-sm); }
.hl-tool-demo-row.is-result strong { color: var(--hl-accent); font-size: 24px; }

/* ---------------- 文章列表 ---------------- */
.hl-with-side { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 36px; align-items: start; }
.hl-main-col { min-width: 0; }
.hl-entry-list { display: grid; gap: 14px; }
.hl-entry {
  display: block; padding: 22px 24px; border: 1px solid var(--hl-line);
  border-radius: var(--hl-radius); background: var(--hl-surface);
  transition: border-color .18s, transform .18s;
}
.hl-entry:hover { border-color: var(--hl-accent); transform: translateY(-1px); }
.hl-entry-kind { font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--hl-warm); }
.hl-entry-title { margin-top: 8px; font: 400 22px/1.3 var(--hl-serif); }
.hl-entry-title a { color: var(--hl-ink); }
.hl-entry-title a:hover { color: var(--hl-accent); }
.hl-entry-summary { margin-top: 8px; color: var(--hl-muted); font-size: 14px; }
.hl-entry-meta { margin-top: 14px; display: flex; gap: 16px; flex-wrap: wrap; color: var(--hl-muted); font-size: 12px; }

/* ---------------- 侧栏 ---------------- */
.hl-side { display: grid; gap: 18px; }
.hl-side-card { padding: 20px; border: 1px solid var(--hl-line); border-radius: var(--hl-radius); background: var(--hl-surface); }
.hl-side-title { font: 400 18px/1.3 var(--hl-serif); margin-bottom: 12px; }
.hl-side-rows { display: grid; }
.hl-side-row { display: block; padding: 11px 0; border-top: 1px solid var(--hl-line); }
.hl-side-row:first-child { border-top: 0; padding-top: 0; }
.hl-side-row-title { font-size: 14px; line-height: 1.45; color: var(--hl-ink); }
.hl-side-row:hover .hl-side-row-title { color: var(--hl-accent); }
.hl-side-row-meta { margin-top: 4px; font-size: 12px; color: var(--hl-muted); }

/* ---------------- 面包屑与分页 ---------------- */
.hl-crumbs { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; font-size: 13px; color: var(--hl-muted); }
.hl-crumbs a { color: var(--hl-muted); }
.hl-crumbs a:hover { color: var(--hl-accent); }
.hl-crumbs-sep { color: var(--hl-line); }
.hl-pagination { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px; margin-top: 32px; }
.hl-pagination .pagination { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 0; }
.hl-pagination .page-item .page-link,
.hl-pagination a, .hl-pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 38px; height: 38px; padding: 0 10px;
  border: 1px solid var(--hl-line); border-radius: var(--hl-radius-sm);
  background: var(--hl-surface); font-size: 13px; color: var(--hl-ink);
}
.hl-pagination .active .page-link, .hl-pagination .active span,
.hl-pagination a:hover { background: var(--hl-accent); border-color: var(--hl-accent); color: #fff; }
.hl-pagination .disabled .page-link { opacity: .45; pointer-events: none; }

/* ---------------- 文章详情 ---------------- */
.hl-article { padding: 36px 40px; border: 1px solid var(--hl-line); border-radius: var(--hl-radius); background: var(--hl-surface); }
.hl-article-head { padding-bottom: 24px; border-bottom: 1px solid var(--hl-line); }
.hl-article-title { font: 400 clamp(28px, 4vw, 44px)/1.16 var(--hl-serif); letter-spacing: -.025em; }
.hl-article-meta { margin-top: 14px; display: flex; gap: 18px; flex-wrap: wrap; color: var(--hl-muted); font-size: 13px; }
.hl-article-body { padding-top: 28px; font-size: 16px; line-height: 1.85; color: #26332c; overflow-wrap: break-word; }
.hl-article-body h2 { margin: 36px 0 14px; font: 400 27px/1.3 var(--hl-serif); letter-spacing: -.015em; }
.hl-article-body h3 { margin: 28px 0 12px; font: 600 19px/1.4 var(--hl-font); }
.hl-article-body h4 { margin: 22px 0 10px; font-size: 16px; font-weight: 700; }
.hl-article-body p { margin: 0 0 18px; }
.hl-article-body ul, .hl-article-body ol { margin: 0 0 20px; padding-left: 1.4rem; }
.hl-article-body li { margin-bottom: 8px; }
.hl-article-body blockquote { margin: 24px 0; padding: 14px 22px; border-left: 3px solid var(--hl-accent); background: var(--hl-accent-soft); color: var(--hl-ink); }
.hl-article-body table { width: 100%; max-width: 100%; margin: 24px 0; border-collapse: collapse; display: block; overflow-x: auto; font-size: 14px; }
.hl-article-body th, .hl-article-body td { padding: 10px 14px; border: 1px solid var(--hl-line); text-align: left; }
.hl-article-body th { background: var(--hl-surface-alt); font-weight: 600; }
.hl-article-body code { padding: 2px 6px; border-radius: 5px; background: var(--hl-surface-alt); font-size: .9em; }
.hl-article-body pre { margin: 22px 0; padding: 18px; border-radius: var(--hl-radius-sm); background: #1d2a23; color: #e8f0ea; overflow-x: auto; }
.hl-article-body pre code { background: none; color: inherit; padding: 0; }
.hl-article-body img { border-radius: var(--hl-radius-sm); }
.hl-article-body hr { margin: 32px 0; border: 0; border-top: 1px solid var(--hl-line); }
.hl-article-foot { margin-top: 32px; }
.hl-article-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.hl-post-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 24px; }
.hl-post-nav-item { padding: 14px 18px; border: 1px solid var(--hl-line); border-radius: var(--hl-radius-sm); background: var(--hl-bg); }
.hl-post-nav-item.is-next { text-align: right; }
.hl-post-nav-label { font-size: 12px; color: var(--hl-muted); }
.hl-post-nav-title { margin-top: 4px; font-size: 14px; font-weight: 600; color: var(--hl-ink); }
.hl-article-related { margin-top: 20px; }

/* ---------------- 专题 / 标签 / 搜索 / 空态 ---------------- */
.hl-topic-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.hl-topic-card { padding: 26px; border: 1px solid var(--hl-line); border-radius: var(--hl-radius); background: var(--hl-surface); }
.hl-topic-card:hover { border-color: var(--hl-accent); }
.hl-topic-title { font: 400 21px/1.3 var(--hl-serif); }
.hl-topic-title a { color: var(--hl-ink); }
.hl-topic-desc { margin-top: 10px; color: var(--hl-muted); font-size: 14px; }
.hl-topic-meta { margin-top: 16px; font-size: 12px; color: var(--hl-muted); }
.hl-tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.hl-tag-cloud a { display: inline-flex; align-items: center; gap: 8px; padding: 8px 15px; border: 1px solid var(--hl-line); border-radius: 999px; background: #fff; font-size: 14px; }
.hl-tag-cloud a:hover { border-color: var(--hl-accent); }
.hl-tag-count { color: var(--hl-muted); font-size: 12px; }
.hl-search-form { display: flex; gap: 10px; max-width: 640px; margin-bottom: 32px; }
.hl-search-form input { flex: 1 1 auto; min-width: 0; height: 48px; padding: 0 16px; border: 1px solid var(--hl-line); border-radius: var(--hl-radius-sm); background: #fff; }
.hl-search-form input:focus { border-color: var(--hl-accent); outline: none; }
.hl-empty { padding: 56px 28px; text-align: center; border: 1px dashed var(--hl-line); border-radius: var(--hl-radius); background: var(--hl-surface); }
.hl-empty-title { font: 400 22px/1.3 var(--hl-serif); }
.hl-empty-desc { margin-top: 8px; color: var(--hl-muted); font-size: 14px; }
.hl-empty .hl-btn { margin-top: 20px; }

/* ---------------- 行动区与页脚 ---------------- */
.hl-cta { padding: 56px 0; background: var(--hl-accent); color: #fff; }
.hl-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap; }
.hl-cta-title { font: 400 clamp(24px, 3vw, 34px)/1.25 var(--hl-serif); }
.hl-cta-desc { margin-top: 10px; color: rgba(255, 255, 255, .78); font-size: 15px; max-width: 560px; }
.hl-cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hl-cta .hl-btn-primary { background: #fff; color: var(--hl-accent); }
.hl-cta .hl-btn-primary:hover { background: var(--hl-accent-soft); color: var(--hl-accent); }
.hl-cta .hl-btn-ghost { color: #fff; border-color: rgba(255, 255, 255, .5); }
.hl-cta .hl-btn-ghost:hover { background: rgba(255, 255, 255, .12); color: #fff; }

.hl-footer { padding: 52px 0 24px; background: #14201a; color: #cdd8d0; }
.hl-footer-inner { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr); gap: 36px; }
.hl-footer-logo { display: inline-flex; align-items: center; gap: 10px; color: #fff; font-size: 19px; font-weight: 700; letter-spacing: -.03em; }
.hl-footer-logo:hover { color: #fff; }
.hl-footer-desc { margin-top: 14px; font-size: 14px; line-height: 1.75; color: #9fb1a6; max-width: 380px; }
.hl-footer-title { color: #fff; font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 14px; }
.hl-footer-links { display: grid; gap: 9px; }
.hl-footer-links a { color: #cdd8d0; font-size: 14px; }
.hl-footer-links a:hover { color: #fff; }
.hl-footer-bottom { margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .12); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12px; color: #8fa196; }

.hl-to-top {
  position: fixed; right: 20px; bottom: 20px; z-index: 40;
  width: 42px; height: 42px; border: 1px solid var(--hl-line); border-radius: 50%;
  background: #fff; color: var(--hl-accent); cursor: pointer;
  box-shadow: var(--hl-shadow); opacity: 0; pointer-events: none; transition: opacity .2s;
}
.hl-to-top.is-visible { opacity: 1; pointer-events: auto; }

/* ---------------- 响应式：一套模板适配所有屏幕 ---------------- */
@media (max-width: 1024px) {
  .hl-hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .hl-hero { padding: 64px 0 56px; }
  .hl-with-side { grid-template-columns: minmax(0, 1fr) 260px; gap: 24px; }
  .hl-grid-3, .hl-topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hl-search-input { width: 130px; }
  .hl-nav { gap: 0; margin-left: 8px; }
  .hl-nav-link { padding: 8px; font-size: 13px; }
}

@media (max-width: 820px) {
  .hl-menu-toggle { display: block; }
  .hl-header-inner { flex-wrap: wrap; min-height: 60px; }
  .hl-logo { margin-right: auto; }
  .hl-nav {
    order: 3; flex: 0 0 100%; margin: 0; display: none;
    flex-direction: column; align-items: stretch; gap: 2px;
    padding: 8px 0 14px; border-top: 1px solid var(--hl-line);
  }
  .hl-nav.is-open { display: flex; }
  .hl-nav-link { padding: 10px 12px; font-size: 15px; }
  .hl-header-actions { gap: 8px; }
  .hl-search { display: none; }
  .hl-with-side { grid-template-columns: 1fr; }
  .hl-side { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hl-tool { grid-template-columns: 1fr; }
  .hl-tool-visual { padding: 20px 24px 24px; }
  .hl-article { padding: 26px 22px; }
  .hl-footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  body.hl-body { font-size: 15px; }
  .hl-wrap { padding: 0 18px; }
  .hl-section { padding: 48px 0; }
  .hl-hero { padding: 48px 0 44px; }
  .hl-hero-title { font-size: clamp(34px, 9vw, 46px); }
  .hl-lede { font-size: 15px; }
  .hl-hero-aside { padding: 20px; }
  .hl-section-head { margin-bottom: 22px; }
  .hl-grid-3, .hl-grid-2, .hl-topic-grid { grid-template-columns: 1fr; }
  .hl-side { grid-template-columns: 1fr; }
  .hl-tool-copy { padding: 24px; }
  .hl-tool-visual { padding: 18px 20px 22px; }
  .hl-card { padding: 20px; }
  .hl-entry { padding: 18px; }
  .hl-entry-title { font-size: 19px; }
  .hl-article { padding: 20px 18px; }
  .hl-article-title { font-size: 28px; }
  .hl-article-body { font-size: 15px; }
  .hl-article-body h2 { font-size: 23px; }
  .hl-post-nav { grid-template-columns: 1fr; }
  .hl-post-nav-item.is-next { text-align: left; }
  .hl-search-form { flex-direction: column; }
  .hl-cta { padding: 40px 0; }
  .hl-cta-actions { width: 100%; }
  .hl-cta-actions .hl-btn { flex: 1 1 auto; }
  .hl-footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .hl-crumbs { font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

@media print {
  .hl-header, .hl-footer, .hl-to-top, .hl-cta, .hl-side, .hl-tool-visual { display: none !important; }
  body.hl-body { background: #fff; }
  .hl-article { border: 0; padding: 0; }
}