/* 延续官网 VI 的内容层：移动端优先，不改变现有首页组件。 */
/* 现行电池徽章横版原件：保持比例，不重新排字或修改图形。 */
.brand-logo, .footer-brand .brand-logo {
  width: 220px;
  max-width: 60vw;
  height: auto;
}
@media (max-width: 680px) {
  .brand-logo, .footer-brand .brand-logo {
    width: 200px;
    max-width: 60vw;
  }
}
[id] { scroll-margin-top: 104px; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 4px;
}
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 12px; background: white; color: var(--ink); }
.skip-link:focus { top: 12px; }
.page-hero { padding: 116px 0 42px; background: var(--navy); color: white; }
.page-hero h1 { max-width: 880px; margin: 20px 0; font-size: 2.25rem; line-height: 1.3; letter-spacing: 0; color: white; }
.page-hero .lead { max-width: 800px; color: #c6d3e4; font-size: 1.0625rem; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; color: #c6d3e4; font-size: .875rem; }
.breadcrumbs a { text-decoration: underline; text-underline-offset: 4px; }
.page-hero .eyebrow { margin-top: 28px; color: #66d6d0; }
.content-section { padding: 52px 0; }
.content-section.tint { background: var(--panel); }
.content-section h2 { font-size: 1.875rem; line-height: 1.4; margin: 0 0 20px; }
.content-section h3 { font-size: 1.25rem; line-height: 1.5; }
.content-section p, .content-section li { font-size: 1rem; }
.content-intro { max-width: 800px; color: var(--muted); }
.section-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.button.outline { background: white; border-color: var(--line); color: var(--ink); box-shadow: none; }
.page-hero .button.outline { background: transparent; color: white; border-color: #64738a; }
.content-grid { display: grid; gap: 24px; }
.content-card { min-width: 0; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: white; }
.content-card h3 { margin: 12px 0; }
.content-card p { margin: 0 0 16px; color: var(--muted); }
.content-card ul { margin: 0; padding-left: 20px; }
.card-label { color: var(--blue); font-size: .875rem; font-weight: 750; }
.content-card .text-link { min-height: 44px; align-items: center; margin-top: 12px; }
.notice { margin-top: 24px; padding: 20px 24px; border-left: 3px solid var(--teal); background: var(--panel); color: var(--ink); }
.notice p { margin: 0; }
.table-scroll { width: 100%; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
.comparison { width: 100%; min-width: 750px; border-collapse: collapse; font-size: 1rem; text-align: left; }
.comparison caption { padding: 20px; background: var(--panel); font-weight: 750; text-align: left; }
.comparison th, .comparison td { padding: 20px; border-bottom: 1px solid var(--line); vertical-align: top; }
.comparison thead { background: var(--navy); color: white; }
.comparison tbody th { color: var(--blue); min-width: 190px; }
.comparison tr:last-child > * { border-bottom: 0; }
.media-row { display: grid; gap: 32px; align-items: center; }
.media-row figure { margin: 0; }
.media-row img { width: 100%; max-height: 360px; object-fit: contain; border-radius: var(--radius); background: var(--panel); }
.media-row figcaption { margin-top: 10px; font-size: .875rem; color: var(--muted); }
.faq-list { max-width: 920px; }
.faq-list details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq-list summary { padding: 8px 0; min-height: 44px; cursor: pointer; font-size: 1.0625rem; font-weight: 750; }
.faq-list p { color: var(--muted); margin-bottom: 4px; max-width: 800px; }
.article-body { max-width: 820px; }
.article-body section + section { margin-top: 38px; }
.article-body a, .form-note a, .consent-label a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.article-body h2 { font-size: 1.375rem; margin-bottom: 12px; }
.article-body li + li { margin-top: 8px; }
.resource-nav { display: flex; flex-wrap: wrap; gap: 10px; padding: 22px 0 0; }
.resource-nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 16px; border: 1px solid var(--line); border-radius: var(--radius); }
.footer-pages { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 14px; font-size: .875rem; }
.footer-pages a { display: inline-flex; align-items: center; min-height: 44px; }
.footer-pages a:hover { color: white; }
.scene-card .text-link { color: white; text-decoration: underline; text-underline-offset: 5px; min-height: 44px; align-items: center; }
.scene-card div { bottom: 20px; }
.home-resources { background: var(--panel); }
.home-resources .content-grid { margin-top: 30px; }
.form-note { margin: 0; color: var(--muted); font-size: .875rem; line-height: 1.7; }
.inquiry-form input, .inquiry-form select, .inquiry-form textarea { font-size: 1rem; min-width: 0; }
.inquiry-form label { font-size: .9375rem; }
.engineering-fields { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 16px; color: var(--ink); }
.engineering-fields summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; font-weight: 750; }
.engineering-fields[open] summary { margin-bottom: 12px; }
.engineering-fields .form-row { margin-bottom: 16px; }
.consent-label { display: flex; align-items: flex-start; gap: 10px; font-weight: 400; }
.consent-label input { flex: 0 0 20px; width: 20px; height: 20px; min-height: 20px; margin-top: 4px; }
.inquiry-form .form-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.inquiry-form .form-actions .button { flex: 1 1 170px; }
.form-status { margin: 0; color: var(--blue-strong); font-size: .9375rem; min-height: 1.7em; }
.inquiry-form [hidden] { display: none; }
.contact-section .form-note, .contact-section .inquiry-form p { color: var(--muted); }
.contact-section .inquiry-form .form-status { color: var(--blue-strong); }
.legal-date { color: #c6d3e4; font-size: .875rem; }
@media (min-width: 681px) {
  .page-hero { padding: 140px 0 56px; }
  .page-hero h1 { font-size: 3.25rem; }
  .content-section { padding: 72px 0; }
  .content-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .section-actions .button { width: auto; }
}
@media (min-width: 981px) {
  .content-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .content-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .media-row { grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); }
}