/* 原生 details 菜单支持无脚本展开，中英文链接始终可用。 */
.language-switcher {
    display: flex;
    justify-content: flex-end;
    position: relative;
    z-index: 20;
    font-size: 0.875rem;
    line-height: 1.5;
}
.language-menu { position: relative; }
.language-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 42px;
    padding: 0.55rem 0.8rem;
    border: 1px solid var(--divider, #e5e7eb);
    border-radius: 999px;
    background: var(--bg, #fff);
    color: var(--text-main);
    font-weight: 500;
    white-space: nowrap;
    list-style: none;
    cursor: pointer;
    transition: border-color 0.18s ease, background-color 0.18s ease;
}
.language-trigger::-webkit-details-marker { display: none; }
.language-trigger::marker { content: ''; }
.language-trigger:hover,
.language-menu[open] .language-trigger { border-color: var(--primary); }
.language-icon { width: 18px; height: 18px; color: var(--primary); }
.language-chevron { width: 14px; height: 14px; opacity: 0.65; transition: transform 0.18s ease; }
.language-menu[open] .language-chevron { transform: rotate(180deg); }
.language-options {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: min(244px, calc(100vw - 48px));
    padding: 0.45rem;
    border: 1px solid var(--divider, #e5e7eb);
    border-radius: 16px;
    background: var(--bg, #fff);
    color: var(--text-main);
    box-shadow: 0 12px 36px rgb(15 23 42 / 12%), 0 2px 6px rgb(15 23 42 / 4%);
    text-align: left;
}
.language-caption {
    display: block;
    padding: 0.5rem 0.65rem;
    color: var(--text-muted, #6b7280);
    font-size: 0.75rem;
    font-weight: 500;
}
.language-option {
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    width: 100%;
    min-height: 44px;
    padding: 0.65rem;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: inherit;
    font: inherit;
    text-align: left;
    text-decoration: none;
    cursor: pointer;
}
.language-option small {
    display: block;
    margin-top: 0.2rem;
    color: var(--text-muted, #6b7280);
    font-size: 0.75rem;
    font-weight: 400;
}
.language-option:hover { background: var(--card-bg, #f3f4f6); }
.language-option[aria-current="true"],
.language-option[aria-pressed="true"] {
    background: var(--accent, #ecfdf5);
    color: var(--primary-dark);
    font-weight: 600;
}
.language-option[aria-current="true"]::after,
.language-option[aria-pressed="true"]::after {
    content: '';
    flex-shrink: 0;
    width: 6px;
    height: 11px;
    margin: 0 0.3rem 0.25rem 0;
    border: solid currentColor;
    border-width: 0 1.8px 1.8px 0;
    transform: rotate(45deg);
}
.language-note { margin: 0; padding: 0.5rem 0.65rem; font-size: 0.75rem; }
.language-switcher :focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
}
.legal-page .language-switcher { margin-bottom: 1.5rem; }
.landing-page header {
    height: auto;
    min-height: 80px;
    gap: 0.5rem;
    justify-content: space-between;
    padding-block: 0.75rem;
}
/* 英文长标题和链接可自然换行，表格只在自身容器内滚动。 */
h1, h2, h3, p, li, td, th, .intro-card { overflow-wrap: anywhere; }
h2::before { flex-shrink: 0; }
.meta-info, .download-buttons, .footer-links { flex-wrap: wrap; }
.table-container { max-width: 100%; }
.legal-page:lang(en) table { min-width: 680px; }
.legal-page:lang(en) .contact-box a { word-break: break-word; }
/* 正文默认可读，脚本或外部资源失败时不会被入场动画隐藏。 */
[data-reveal], .legal-page section {
    opacity: 1;
    transform: none;
}
@media (max-width: 480px) {
    .language-trigger { padding-inline: 0.65rem; gap: 0.4rem; }
    .legal-page:lang(en) h1 { font-size: 2rem; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
    }
}