:root {
    --sub-bg: #07101d;
    --sub-bg-soft: #0c1626;
    --sub-card: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
    --sub-line: rgba(255,255,255,0.08);
    --sub-text: #f7f9fc;
    --sub-soft: #b7c1d9;
    --sub-muted: #8a96b3;
    --sub-primary: #7c89ff;
    --sub-primary-2: #a26dff;
    --sub-shadow: 0 18px 42px rgba(0,0,0,0.18);
    --sub-focus-ring: 0 0 0 3px rgba(124,137,255,0.22), 0 0 0 1px rgba(167,180,255,0.46);
}

body {
    background:
        radial-gradient(ellipse 70% 28% at 50% 0%, rgba(124, 137, 255, 0.10), transparent 70%),
        linear-gradient(180deg, #07101d 0%, #091322 100%);
    color: var(--sub-text);
}

.nav {
    background: rgba(7, 16, 29, 0.84) !important;
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.05) !important;
}

.nav-link,
.nav-logo,
.nav-lang-btn {
    color: var(--sub-soft) !important;
}

.nav-link:hover,
.nav-link.active,
.nav-logo:hover {
    color: var(--sub-text) !important;
}

.nav-cta {
    background: linear-gradient(135deg, rgba(124,137,255,0.16), rgba(162,109,255,0.12)) !important;
    border: 1px solid rgba(124,137,255,0.22) !important;
    color: var(--sub-text) !important;
}

main,
.legal-page,
.guide-page,
.a11y-page,
.a11y-section {
    color: var(--sub-text);
}

.legal-content,
.a11y-container,
.guide-container,
.guide-main,
.guide-content {
    width: min(calc(100% - 40px), 1120px);
    margin-left: auto;
    margin-right: auto;
}

.legal-header,
.guide-hero,
.a11y-hero {
    background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.025)) !important;
    border: 1px solid var(--sub-line) !important;
    box-shadow: var(--sub-shadow);
    border-radius: 28px;
}

.legal-title,
.a11y-hero-title,
.guide-title,
.guide-hero h1,
.guide-hero-title {
    color: var(--sub-text) !important;
}

.legal-date,
.legal-body,
.legal-body p,
.legal-body li,
.a11y-hero-subtitle,
.a11y-hero-desc,
.a11y-section-subtitle,
.provider-desc,
.provider-models,
.note-box,
.tut-step-content p {
    color: var(--sub-soft) !important;
}

.highlight-box,
.data-flow-visual,
.flow-box,
.storage-table,
.provider-card,
.note-box,
.tutorial-steps,
.url-copy-row,
.copy-config-box,
.a11y-feature-card,
.a11y-scenario-card,
.a11y-promise,
.a11y-feedback,
.footer-company-info {
    background: var(--sub-card) !important;
    border: 1px solid var(--sub-line) !important;
    box-shadow: var(--sub-shadow);
}

.storage-table th,
.storage-table td,
.legal-body table th,
.legal-body table td {
    border-color: rgba(255,255,255,0.08) !important;
}

.storage-table th,
.legal-body table th {
    background: rgba(255,255,255,0.04) !important;
    color: var(--sub-text) !important;
}

.flow-box-title,
.provider-info h3,
.tut-step-content h4,
.a11y-feature-title,
.a11y-section-title,
.a11y-promise h3,
.footer-column h4 {
    color: var(--sub-text) !important;
}

.provider-badges .badge,
.a11y-stat,
.a11y-feature-icon,
.a11y-scenario-icon {
    box-shadow: none;
}

.screenshot-placeholder {
    background: rgba(255,255,255,0.03) !important;
    border: 1px solid rgba(255,255,255,0.08) !important;
    border-radius: 18px !important;
    padding: 10px;
}

.screenshot-placeholder img {
    border-radius: 12px;
}

.copy-btn,
.provider-expand-btn,
.nav-cta,
button {
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}

.copy-btn:hover,
.provider-expand-btn:hover,
.nav-cta:hover,
button:hover {
    transform: translateY(-1px);
}
.copy-btn:active,
.provider-expand-btn:active,
.nav-cta:active,
button:active {
    transform: translateY(0) scale(0.985);
}
.nav-link:focus-visible,
.nav-cta:focus-visible,
.copy-btn:focus-visible,
.provider-expand-btn:focus-visible,
.legal-toc-link:focus-visible,
.a11y-action-links a:focus-visible,
.guide-quick-links a:focus-visible,
.btn:focus-visible {
    box-shadow: var(--sub-focus-ring);
    outline: none;
}

@media (hover: hover) and (pointer: fine) {
    .interactive-surface,
    .interactive-button {
        position: relative;
        isolation: isolate;
    }

    .interactive-surface::before,
    .interactive-button::before {
        content: "";
        position: absolute;
        inset: -1px;
        border-radius: inherit;
        background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
        opacity: 0;
        transition: opacity .18s ease;
        pointer-events: none;
        z-index: 0;
    }

    .interactive-surface > *,
    .interactive-button > * {
        position: relative;
        z-index: 1;
    }

    .interactive-surface:hover::before,
    .interactive-button:hover::before {
        opacity: 1;
    }

    .interactive-surface {
        transition: border-color .18s ease, box-shadow .18s ease, background .18s ease, transform .18s ease;
    }

    .interactive-surface:hover {
        transform: translateY(-3px);
        border-color: rgba(124,137,255,0.24);
        box-shadow: 0 18px 36px rgba(0,0,0,0.2), 0 0 0 1px rgba(124,137,255,0.12) inset;
    }

    .interactive-button {
        overflow: hidden;
    }

    .screenshot-placeholder.interactive-surface:hover,
    .a11y-action-links a.interactive-button:hover,
    .guide-quick-links a.interactive-button:hover {
        box-shadow: 0 16px 30px rgba(0,0,0,0.16), 0 0 0 1px rgba(124,137,255,0.12) inset;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

.a11y-hero {
    background:
        radial-gradient(ellipse 70% 40% at 50% 0%, rgba(124,137,255,0.16), transparent 65%),
        linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.025)) !important;
}

.a11y-stat {
    background: rgba(255,255,255,0.05) !important;
    border: 1px solid rgba(255,255,255,0.08) !important;
}

.footer {
    background: rgba(255,255,255,0.03) !important;
    border-top: 1px solid rgba(255,255,255,0.06) !important;
}

.site-footer-v2 {
    padding: 48px 0 24px;
    background: rgba(255,255,255,0.03) !important;
    border-top: 1px solid rgba(255,255,255,0.06) !important;
}

.footer-grid-v2 {
    display: grid;
    grid-template-columns: minmax(280px, 1.25fr) repeat(4, minmax(120px, 0.6fr));
    gap: 24px;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-blurb {
    max-width: 44ch;
    margin: 0;
    color: var(--sub-soft);
}

.footer-links-v2 {
    display: grid;
    gap: 10px;
    align-content: start;
    color: var(--sub-soft);
}

.footer-links-v2 strong {
    color: var(--sub-text);
    font-size: 0.92rem;
    margin-bottom: 4px;
}

.footer-links-v2 a {
    color: var(--sub-soft);
}

.footer-links-v2 a:hover {
    color: var(--sub-text);
}

.footer-bottom-v2 {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding-top: 18px;
    color: var(--sub-muted);
    font-size: 0.9rem;
}

.footer-company-v2 {
    display: grid;
    gap: 4px;
}

.footer-company-v2 p,
.footer-meta-v2 p {
    margin: 0;
}

.footer-company-v2 strong {
    color: var(--sub-text);
}

.footer-meta-v2 {
    display: grid;
    gap: 4px;
    justify-items: end;
    text-align: right;
}

.footer-brand p,
.footer-links a,
.footer-bottom,
.footer-company-info {
    color: var(--sub-soft) !important;
}

.footer-logo-img {
    box-shadow: 0 12px 28px rgba(124,137,255,0.12);
}

.inline-link,
a {
    text-underline-offset: 3px;
}

@media (max-width: 900px) {
    .legal-content,
    .a11y-container,
    .guide-container,
    .guide-main,
    .guide-content {
        width: min(calc(100% - 28px), 1120px);
    }
}

html, body {
    background: #07101d !important;
}

body {
    color: var(--sub-text) !important;
}

.nav,
.nav.scrolled {
    background: rgba(7, 16, 29, 0.88) !important;
    backdrop-filter: blur(16px) !important;
    -webkit-backdrop-filter: blur(16px) !important;
    border-bottom: 1px solid rgba(255,255,255,0.05) !important;
}

.nav-container,
.nav-links,
.nav-actions,
.nav-lang {
    background: transparent !important;
}

.logo-text,
.nav-logo .logo-text,
.nav-link,
.lang-btn,
.lang-divider {
    color: var(--sub-soft) !important;
}

.nav-link.active,
.nav-link:hover,
.lang-btn.active,
.nav-logo:hover .logo-text {
    color: var(--sub-text) !important;
}

.nav-mobile-toggle {
    border-color: rgba(255,255,255,0.08) !important;
    background: rgba(255,255,255,0.04) !important;
}

.nav-mobile-toggle span {
    background: var(--sub-text) !important;
}

main {
    background: transparent !important;
}

.legal-page,
.guide-page,
.a11y-page {
    background: transparent !important;
}

.legal-content,
.guide-main,
.a11y-container {
    padding-top: 112px;
    padding-bottom: 48px;
}

.legal-header,
.guide-hero,
.a11y-hero,
.a11y-section,
.provider-card,
.highlight-box,
.data-flow-visual,
.a11y-promise,
.a11y-feedback {
    overflow: hidden;
}

.provider-card,
.a11y-feature-card,
.a11y-scenario-card,
.note-box,
.tutorial-steps,
.copy-config-box,
.url-copy-row {
    border-radius: 22px !important;
}

.storage-table,
.legal-body table {
    border-radius: 18px;
    overflow: hidden;
}

.footer-company-info {
    margin-top: 26px !important;
    padding-top: 18px !important;
    border-top: 1px solid rgba(255,255,255,0.08) !important;
    font-size: 0.9rem !important;
    color: var(--sub-soft) !important;
    text-align: left !important;
    background: transparent !important;
    box-shadow: none !important;
}

.footer-company-info p,
.footer-company-info strong {
    color: inherit !important;
}

.footer-company-info strong {
    color: var(--sub-text) !important;
}

.footer-company-title {
    margin-bottom: 8px !important;
}

.footer-company-line {
    margin-bottom: 4px !important;
}

@media (max-width: 900px) {
    .legal-content,
    .guide-main,
    .a11y-container {
        padding-top: 96px;
    }

    .footer-grid-v2,
    .footer-bottom-v2 {
        grid-template-columns: 1fr;
        flex-direction: column;
    }

    .footer-meta-v2 {
        justify-items: start;
        text-align: left;
    }
}

.legal-content {
    max-width: 1180px !important;
}

.legal-header {
    padding: 28px 28px 22px !important;
    margin-bottom: 24px !important;
}

.legal-title {
    font-size: clamp(2rem, 4vw, 2.8rem) !important;
    letter-spacing: -0.04em;
}

.legal-date {
    color: var(--sub-muted) !important;
    font-size: 0.92rem !important;
}

.legal-body {
    font-size: 1rem !important;
    line-height: 1.78 !important;
}

.legal-body h2 {
    margin-top: 34px !important;
    margin-bottom: 14px !important;
    font-size: 1.35rem !important;
    color: var(--sub-text) !important;
}

.legal-body h3 {
    margin-top: 22px !important;
    margin-bottom: 10px !important;
    font-size: 1.08rem !important;
    color: var(--sub-text) !important;
}

.legal-body p,
.legal-body li {
    color: var(--sub-soft) !important;
}

.legal-body ul,
.legal-body ol {
    padding-left: 22px !important;
}

.highlight-box {
    padding: 18px 18px 16px !important;
    border-radius: 20px !important;
}

.data-flow-visual {
    padding: 22px !important;
    border-radius: 22px !important;
}

.flow-diagram {
    gap: 14px !important;
}

.storage-table {
    margin-top: 18px !important;
}

.storage-table th,
.storage-table td {
    padding: 14px 12px !important;
    font-size: 0.92rem !important;
}

.legal-body code,
.url-copy-row code {
    background: rgba(255,255,255,0.06) !important;
    color: var(--sub-text) !important;
    border-radius: 10px !important;
    padding: 2px 8px !important;
}

.legal-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(124,137,255,0.12);
    border: 1px solid rgba(124,137,255,0.2);
    color: var(--sub-text);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.legal-intro {
    margin: 14px 0 0;
    max-width: 72ch;
    color: var(--sub-soft);
    font-size: 1.03rem;
    line-height: 1.75;
}

.legal-header-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.legal-meta-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    color: var(--sub-soft);
    font-size: 0.92rem;
    line-height: 1.35;
}

.legal-meta-pill strong {
    color: var(--sub-text);
    font-weight: 600;
}

.legal-summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: 22px;
}

.legal-summary-card {
    padding: 16px 16px 14px;
    border-radius: 18px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
}

.legal-summary-label {
    color: var(--sub-muted);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.legal-summary-value {
    margin-top: 10px;
    color: var(--sub-text);
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
}

.legal-layout {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.legal-sidebar {
    position: sticky;
    top: 104px;
}

.legal-toc {
    padding: 20px;
    border-radius: 22px;
    background: var(--sub-card);
    border: 1px solid var(--sub-line);
    box-shadow: var(--sub-shadow);
}

.legal-toc-eyebrow {
    margin: 0 0 6px;
    color: var(--sub-muted);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.legal-toc-title {
    margin: 0 0 12px;
    color: var(--sub-text);
    font-size: 1.05rem;
    font-weight: 700;
}

.legal-toc-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.legal-toc-link {
    display: block;
    padding: 10px 12px;
    border-radius: 14px;
    border: 1px solid transparent;
    color: var(--sub-soft) !important;
    font-size: 0.94rem;
    line-height: 1.4;
    text-decoration: none;
}

.legal-toc-link:hover,
.legal-toc-link.active {
    background: rgba(124,137,255,0.12);
    border-color: rgba(124,137,255,0.22);
    color: var(--sub-text) !important;
}

.legal-toc-note {
    margin: 14px 0 0;
    color: var(--sub-muted);
    font-size: 0.88rem;
    line-height: 1.55;
}

.legal-main {
    min-width: 0;
    padding: 30px 32px 28px;
    border-radius: 28px;
    background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: var(--sub-shadow);
}

.legal-body > :first-child {
    margin-top: 0 !important;
}

.legal-body h2 {
    scroll-margin-top: 120px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.legal-body h2:first-of-type {
    padding-top: 0;
    border-top: 0;
}

.legal-body h3 {
    scroll-margin-top: 120px;
}

.legal-body p,
.legal-body li {
    font-size: 1.02rem;
}

.legal-table-wrap {
    overflow-x: auto;
    margin-top: 18px;
    border-radius: 18px;
}

.legal-table-wrap .storage-table,
.legal-table-wrap .legal-body table {
    min-width: 680px;
    margin-top: 0 !important;
}

@media (max-width: 1100px) {
    .legal-summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .legal-layout {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .legal-sidebar {
        position: static;
    }

    .legal-main {
        padding: 24px 24px 22px;
    }
}

@media (max-width: 640px) {
    .legal-header {
        padding: 24px 20px 18px !important;
    }

    .legal-summary-grid {
        grid-template-columns: 1fr;
    }

    .legal-main {
        padding: 20px 18px;
        border-radius: 24px;
    }

    .legal-toc {
        padding: 16px;
        border-radius: 18px;
    }

    .legal-toc-list {
        max-height: 260px;
        overflow: auto;
        padding-right: 4px;
    }

    .legal-body h2 {
        font-size: 1.22rem !important;
    }

    .legal-body p,
    .legal-body li {
        font-size: 0.98rem;
    }
}

/* ============================================
   Light Mode - 自动跟随系统设置
   ============================================ */
@media (prefers-color-scheme: light) {
    :root {
        --sub-bg: #FFFFFF;
        --sub-bg-soft: #F8FAFC;
        --sub-card: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(248,250,252,0.92));
        --sub-line: rgba(0,0,0,0.08);
        --sub-text: #0F172A;
        --sub-soft: #475569;
        --sub-muted: #94A3B8;
        --sub-primary: #6366F1;
        --sub-primary-2: #7C3AED;
        --sub-shadow: 0 12px 28px rgba(0,0,0,0.06);
        --sub-focus-ring: 0 0 0 3px rgba(99,102,241,0.22), 0 0 0 1px rgba(99,102,241,0.48);
    }

    html, body {
        background: #FFFFFF !important;
    }

    body {
        background:
            radial-gradient(ellipse 70% 28% at 50% 0%, rgba(99,102,241,0.05), transparent 70%),
            linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%) !important;
        color: var(--sub-text) !important;
    }

    .nav,
    .nav.scrolled {
        background: rgba(255,255,255,0.88) !important;
        backdrop-filter: blur(16px) !important;
        -webkit-backdrop-filter: blur(16px) !important;
        border-bottom: 1px solid rgba(0,0,0,0.06) !important;
    }

    .nav-container,
    .nav-links,
    .nav-actions,
    .nav-lang {
        background: transparent !important;
    }

    .logo-text,
    .nav-logo .logo-text,
    .nav-link,
    .lang-btn,
    .lang-divider {
        color: var(--sub-soft) !important;
    }

    .nav-link.active,
    .nav-link:hover,
    .lang-btn.active,
    .nav-logo:hover .logo-text {
        color: var(--sub-text) !important;
    }

    .nav-cta {
        background: linear-gradient(135deg, rgba(99,102,241,0.10), rgba(124,99,241,0.06)) !important;
        border: 1px solid rgba(99,102,241,0.20) !important;
        color: var(--sub-text) !important;
    }

    .nav-mobile-toggle {
        border-color: rgba(0,0,0,0.08) !important;
        background: rgba(0,0,0,0.03) !important;
    }

    .nav-mobile-toggle span {
        background: var(--sub-text) !important;
    }

    main {
        background: transparent !important;
    }

    .legal-page,
    .guide-page,
    .a11y-page {
        background: transparent !important;
    }

    .legal-header,
    .guide-hero {
        background: linear-gradient(180deg, rgba(0,0,0,0.02), rgba(0,0,0,0.01)) !important;
        border: 1px solid rgba(0,0,0,0.08) !important;
        box-shadow: var(--sub-shadow);
    }

    .a11y-hero {
        background:
            radial-gradient(ellipse 70% 40% at 50% 0%, rgba(99,102,241,0.06), transparent 65%),
            linear-gradient(180deg, rgba(0,0,0,0.02), rgba(0,0,0,0.01)) !important;
        border: 1px solid rgba(0,0,0,0.08) !important;
        box-shadow: var(--sub-shadow);
    }

    .highlight-box,
    .data-flow-visual,
    .flow-box,
    .storage-table,
    .provider-card,
    .note-box,
    .tutorial-steps,
    .url-copy-row,
    .copy-config-box,
    .a11y-feature-card,
    .a11y-scenario-card,
    .a11y-promise,
    .a11y-feedback {
        background: var(--sub-card) !important;
        border: 1px solid rgba(0,0,0,0.08) !important;
        box-shadow: var(--sub-shadow);
    }

    .storage-table th,
    .storage-table td,
    .legal-body table th,
    .legal-body table td {
        border-color: rgba(0,0,0,0.08) !important;
    }

    .storage-table th,
    .legal-body table th {
        background: rgba(0,0,0,0.03) !important;
    }

    .a11y-stat {
        background: rgba(0,0,0,0.03) !important;
        border: 1px solid rgba(0,0,0,0.08) !important;
    }

    .footer,
    .site-footer-v2 {
        background: rgba(0,0,0,0.02) !important;
        border-top: 1px solid rgba(0,0,0,0.06) !important;
    }

    .footer-grid-v2 {
        border-bottom: 1px solid rgba(0,0,0,0.08);
    }

    .footer-brand p,
    .footer-links a,
    .footer-bottom,
    .footer-company-info {
        color: var(--sub-soft) !important;
    }

    .footer-company-info {
        border-top: 1px solid rgba(0,0,0,0.08) !important;
        background: transparent !important;
    }

    .footer-logo-img {
        box-shadow: 0 12px 28px rgba(99,102,241,0.08);
    }

    .legal-toc {
        background: var(--sub-card);
        border: 1px solid rgba(0,0,0,0.08);
        box-shadow: var(--sub-shadow);
    }

    .legal-toc-link {
        color: var(--sub-soft) !important;
    }

    .legal-toc-link:hover,
    .legal-toc-link.active {
        background: rgba(99,102,241,0.08);
        border-color: rgba(99,102,241,0.18);
        color: var(--sub-text) !important;
    }

    .legal-main {
        background: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(248,250,252,0.92));
        border: 1px solid rgba(0,0,0,0.08);
        box-shadow: var(--sub-shadow);
    }

    .legal-body h2 {
        border-top: 1px solid rgba(0,0,0,0.08);
    }

    .legal-kicker {
        background: rgba(99,102,241,0.08);
        border: 1px solid rgba(99,102,241,0.16);
    }

    .legal-meta-pill {
        background: rgba(0,0,0,0.03);
        border: 1px solid rgba(0,0,0,0.08);
    }

    .legal-summary-card {
        background: rgba(0,0,0,0.02);
        border: 1px solid rgba(0,0,0,0.08);
    }

    .legal-body code,
    .url-copy-row code {
        background: rgba(0,0,0,0.04) !important;
    }

    .screenshot-placeholder {
        background: rgba(0,0,0,0.02) !important;
        border: 1px solid rgba(0,0,0,0.08) !important;
    }

    .provider-badges .badge,
    .a11y-stat,
    .a11y-feature-icon,
    .a11y-scenario-icon {
        box-shadow: none;
    }
}