/* “关于我们”的产业定位与使用边界，三种语言共用。 */
.about-foundations {
    margin: 0;
    background: #fff;
    font-family: "Noto Sans SC", sans-serif;
}

.about-foundations main {
    color: #12283b;
    font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

.about-foundations main *,
.about-foundations main *::before,
.about-foundations main *::after { box-sizing: border-box; }

.about-shell { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.about-foundations .page-header { padding: 160px 0 72px; }
.about-foundations .page-header p { margin: 22px auto 0; line-height: 1.8; }
.about-foundations .about-section { padding: 72px 0; }
.about-section--tinted { background: #f4f8fa; }
.about-section-heading { max-width: 800px; margin-bottom: 32px; }
.about-foundations main h2 { margin: 0 0 18px; color: #12283b; font-size: clamp(1.65rem, 3vw, 2.25rem); line-height: 1.5; }
.about-foundations main h3 { margin: 0 0 14px; color: #12283b; font-size: 1.2rem; line-height: 1.5; }
.about-foundations main p { margin: 0 0 16px; font-size: 1rem; line-height: 1.9; }
.about-foundations main p:last-child { margin-bottom: 0; }
.about-section-heading p, .about-intro p, .about-audience p, .about-boundaries p { color: #4b6071; }
.about-intro { max-width: 900px; }
.about-foundations .about-eyebrow { margin-bottom: 12px; color: #946235; font-size: .875rem; font-weight: 700; letter-spacing: .08em; }
.about-systems { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.about-system { display: flex; flex-direction: column; padding: 32px; border-top: 4px solid #137a98; background: #fff; }
.about-system--technical { border-color: #bd8650; }
.about-system__top { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.about-system__code { color: #0b668f; font-size: 1.6rem; font-weight: 700; letter-spacing: .06em; }
.about-status { padding: 5px 12px; border-radius: 4px; background: #eaf4f7; color: #21566d; font-size: .875rem; }
.about-status--pending { color: #76512e; background: #f7f0e7; }
.about-foundations .about-system__name { color: #536b7a; font-size: .875rem; line-height: 1.6; }
.about-system ul { margin: 8px 0 22px; padding-left: 22px; color: #4b6071; font-size: 1rem; line-height: 1.9; }
.about-system__summary { margin-top: auto !important; padding-top: 18px; border-top: 1px solid #dce6eb; color: #0b668f; font-weight: 600; }
.about-foundations .about-systems-note { margin-top: 24px; color: #405767; }
.about-audiences { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.about-audience { padding: 24px 0 0; border-top: 2px solid #dce6eb; }
.about-progress { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.about-progress article { padding: 24px; border-left: 3px solid #137a98; background: #fff; }
.about-progress article:last-child { border-color: #bd8650; }
.about-foundations .about-progress-note { margin-top: 24px; color: #4b6071; }
.about-boundaries { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 40px; }
.about-boundaries article { padding-top: 22px; border-top: 1px solid #dce6eb; }
.about-content-links { display: flex; gap: 12px 24px; flex-wrap: wrap; margin-top: 26px; }
.about-content-links a { padding: 10px 0; color: #0b668f; font-size: 1rem; text-decoration: underline; text-underline-offset: 5px; }
.about-content-links a:hover { color: #06374e; }
.about-content-links a:focus-visible { outline: 3px solid #137a98; outline-offset: 5px; }

/* 页头、页脚沿用全站缩放；正文抵消缩放，保持阅读字号和响应式宽度。 */
@media (min-width: 1200px) {
    .about-foundations main { zoom: calc(1 / var(--desktop-scale, 1)); }
}

@media (max-width: 1199px) {
    .about-audiences { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 767px) {
    .about-shell { width: calc(100% - 40px); }
    .about-foundations .page-header p { font-size: 1rem; }
    .about-systems, .about-audiences, .about-progress, .about-boundaries { grid-template-columns: 1fr; }
    .about-system { padding: 24px; }
    .about-section-heading { margin-bottom: 24px; }
}