/* BLANK Tools 产品壳：只统一导航、页脚、相关工具和移动端菜单。 */
:root {
  --brand-paper: #f8f9f5;
  --brand-ink: #1c302a;
  --brand-muted: #69756f;
  --brand-line: #dce2d9;
  --brand-green: #234a3c;
  --brand-accent: #d66c45;
  --brand-surface: #ffffff;
  --brand-radius-sm: 8px;
  --brand-radius-md: 12px;
  --brand-shell-width: 1200px;
}

.site-header {
  max-width: none;
  min-height: 80px;
  height: auto;
  margin: 0;
  padding: 0 44px;
  background: var(--brand-paper);
  border-bottom: 1px solid var(--brand-line);
  position: relative;
  z-index: 20;
}

.site-header .brand-family { display: flex; align-items: center; min-width: 0; flex-shrink: 0; }
.site-header .brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--brand-ink);
  font-family: "Avenir Next", "Helvetica Neue", sans-serif;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.site-header .brand-mark { color: var(--brand-green); font-size: 23px; line-height: 1; }
.site-header nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(14px, 2vw, 28px);
  margin-left: auto;
  font-family: "Avenir Next", "Helvetica Neue", sans-serif;
  font-size: 12px;
  white-space: nowrap;
}
.site-header nav a { position: relative; padding: 8px 0; color: var(--brand-muted); font-weight: 500; transition: color 180ms ease; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--brand-ink); }
.site-header nav a[aria-current="page"]::after { position: absolute; right: 0; bottom: 0; left: 0; height: 2px; border-radius: 2px; background: var(--brand-accent); content: ""; }
.menu-toggle { display: none; align-items: center; gap: 7px; min-height: 36px; padding: 7px 10px; border: 1px solid var(--brand-line); border-radius: var(--brand-radius-sm); color: var(--brand-ink); background: transparent; font-size: 11px; }
.menu-toggle-icon { font-size: 17px; line-height: 1; }

.brand-footer {
  max-width: none;
  margin-top: 96px;
  padding: 0 44px 28px !important;
  display: block;
  border-top: 1px solid var(--brand-line);
  color: var(--brand-muted);
}
.brand-footer .footer-product, .brand-footer .footer-bottom { width: min(100%, var(--brand-shell-width)); margin: 0 auto; }
.brand-footer .footer-product { display: grid; grid-template-columns: minmax(190px, 0.8fr) minmax(0, 1.2fr); align-items: start; gap: 36px; padding: 32px 0 28px; }
.footer-product strong { color: var(--brand-ink); font-family: "Avenir Next", "Helvetica Neue", sans-serif; font-size: 17px; font-weight: 650; letter-spacing: -0.02em; }
.footer-product p { max-width: 230px; margin: 9px 0 0; font-size: 11px; line-height: 1.7; }
.footer-product nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px 24px; margin: 0; font-size: 11px; }
.footer-product nav a { padding: 4px 0; color: var(--brand-muted); }
.footer-product nav a:hover, .footer-product nav a[aria-current="page"] { color: var(--brand-ink); }
.footer-product nav a[aria-current="page"]::after { bottom: -1px; }
.brand-footer .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 18px; border-top: 1px solid var(--brand-line); font-size: 10px; line-height: 1.7; }

.related-tools { margin-top: 112px; padding-top: 42px; border-top: 1px solid var(--brand-line); }
.related-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: 24px; }
.related-heading .eyebrow { margin-bottom: 12px; }
.related-heading h2 { font-size: 30px; line-height: 1.25; }
.related-heading > p:last-child { max-width: 280px; margin: 0 0 4px; color: var(--brand-muted); font-size: 12px; line-height: 1.8; }
.related-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.related-card { display: flex; min-height: 146px; flex-direction: column; justify-content: space-between; gap: 20px; padding: 20px; border: 1px solid var(--brand-line); border-radius: var(--brand-radius-md); background: rgb(255 255 255 / 0.62); transition: border-color 180ms ease, background 180ms ease, transform 180ms ease; }
.related-card:hover { border-color: #b9c8ba; background: var(--brand-surface); transform: translateY(-2px); }
.related-card strong { color: var(--brand-ink); font-family: "Avenir Next", "Helvetica Neue", sans-serif; font-size: 14px; font-weight: 650; }
.related-card p { margin: 7px 0 0; color: var(--brand-muted); font-size: 11px; line-height: 1.7; }
.related-card span:last-child { color: var(--brand-accent); font-family: "Avenir Next", "Helvetica Neue", sans-serif; font-size: 10px; letter-spacing: 0.04em; }

@media (max-width: 980px) {
  .site-header { padding-inline: 28px; }
  .site-header nav { gap: 14px; }
  .related-heading { display: block; }
  .related-heading > p:last-child { margin-top: 14px; }
}

@media (max-width: 760px) {
  .site-header { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 12px; min-height: 72px; padding: 14px 22px; }
  .site-header .brand { font-size: 17px; }
  .site-header .brand-mark { font-size: 21px; }
  .site-header .brand-family { grid-column: 1; grid-row: 1; }
  .site-header .menu-toggle { grid-column: 2; grid-row: 1; }
  .site-header .locale-switcher { grid-column: 3; grid-row: 1; }
  .menu-toggle { display: inline-flex; }
  .site-header nav { display: none; grid-column: 1 / -1; width: 100%; flex-direction: column; align-items: stretch; gap: 0; margin: 2px 0 0; padding-top: 8px; border-top: 1px solid var(--brand-line); }
  .site-header[data-menu-open="true"] nav { display: flex; }
  .site-header nav a { padding: 11px 0; border-bottom: 1px solid var(--brand-line); }
  .site-header nav a[aria-current="page"]::after { right: auto; width: 24px; }
  .brand-footer { margin-top: 72px; padding-inline: 22px !important; }
  .brand-footer .footer-product { display: block; padding-top: 26px; }
  .footer-product nav { justify-content: flex-start; margin-top: 22px; gap: 8px 18px; }
  .brand-footer .footer-bottom { align-items: flex-start; flex-direction: column; gap: 4px; }
  .related-tools { margin-top: 72px; padding-top: 30px; }
  .related-heading h2 { font-size: 26px; }
  .related-grid { grid-template-columns: 1fr; gap: 10px; }
  .related-card { min-height: 120px; }
}