:root {
    color-scheme: light;
    --bg: #eef3f8;
    --bg-soft: #f6f8fa;
    --surface: #ffffff;
    --surface-muted: #f6f8fa;
    --surface-blue: #e4eef9;
    --surface-blue-strong: #bdd9fa;
    --text: #092344;
    --text-soft: #66707c;
    --text-faint: rgba(102, 112, 124, 0.72);
    --line: rgba(9, 35, 68, 0.08);
    --line-strong: rgba(9, 35, 68, 0.12);
    --accent: #2083ff;
    --accent-strong: #166edb;
    --success: #5cd47e;
    --warning: #feb908;
    --danger: #ff3b6d;
    --shadow-lg: 0 28px 56px rgba(9, 35, 68, 0.08);
    --shadow-md: 0 14px 30px rgba(9, 35, 68, 0.06);
    --shadow-sm: 0 8px 18px rgba(9, 35, 68, 0.04);
    --radius-xl: 24px;
    --radius-lg: 20px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --radius-xs: 10px;
    --max-width: 1240px;
    --transition: 220ms ease;
}
*,
*::before,
*::after {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    min-height: 100vh;
    font-family: "Manrope", "Helvetica Neue", sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #f7faff 0%, #eef3f8 56%, #f4f7fb 100%);
}
body::before,
body::after {
    content: "";
    position: fixed;
    pointer-events: none;
    z-index: -1;
}
body::before {
    top: -40px;
    right: 6%;
    width: 320px;
    height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(189, 217, 250, 0.8), transparent 72%);
    filter: blur(24px);
}
body::after {
    display: none;
}
a {
    color: inherit;
    text-decoration: none;
}
button,
a.button {
    font: inherit;
}
img {
    max-width: 100%;
    display: block;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    padding-top: 16px;
    background: linear-gradient(180deg, rgba(238, 243, 248, 0.92), rgba(238, 243, 248, 0.52) 70%, transparent);
    backdrop-filter: blur(18px);
}
.header-inner,
.page-shell,
.footer-inner,
.footer-meta {
    width: min(calc(100% - 32px), var(--max-width));
    margin: 0 auto;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 14px 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.86);
    box-shadow: var(--shadow-sm);
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}
.brand-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 20px rgba(32, 131, 255, 0.18);
}
.brand-copy {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.brand-name {
    font-size: 0.98rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text);
}
.brand-tagline {
    color: var(--text-faint);
    font-size: 0.79rem;
}
.site-nav,
.language-switch {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px;
    border-radius: 999px;
    background: var(--surface-muted);
}
.site-nav a,
.language-switch button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 36px;
    padding: 0 14px;
    border-radius: 999px;
    border: 0;
    color: var(--text-soft);
    background: transparent;
    cursor: pointer;
    transition:
        background var(--transition),
        color var(--transition),
        transform var(--transition);
}
.site-nav a:hover,
.site-nav a:focus-visible,
.language-switch button:hover,
.language-switch button:focus-visible {
    color: var(--accent);
    background: var(--surface);
}
.language-switch button.is-active {
    color: #ffffff;
    background: var(--accent);
}
.page-shell {
    padding: 28px 0 80px;
}
.home-shell, .legal-shell {
    display: grid;
    gap: 24px;
}
.hero-grid {
    position: relative;
    overflow: hidden;
    display: grid;
    grid-template-columns: minmax(0, 430px) minmax(0, 1fr);
    gap: 24px 32px;
    align-items: start;
    padding: 34px;
}
.hero-grid, .stats-strip, .legal-hero, .legal-toc-card, .legal-entry, .footer-inner {
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.94);
    box-shadow: var(--shadow-md);
}
.hero-grid::before {
    content: "";
    position: absolute;
    top: 22px;
    right: 24px;
    width: 88px;
    height: 8px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(32, 131, 255, 0.24), rgba(32, 131, 255, 0));
}
.hero-grid::after {
    content: none;
}
.hero-copy {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 18px;
    align-content: start;
    min-width: 0;
    padding-top: 4px;
}
.hero-copy-intro {
    display: grid;
    align-content: start;
    gap: 10px;
}
.hero-copy-body {
    display: grid;
    gap: 16px;
    max-width: 32rem;
}
.hero-panel {
    position: relative;
    z-index: 1;
    display: grid;
    align-content: start;
    gap: 14px;
}
.hero-preview {
    padding: 10px;
    border-radius: 20px;
    background: linear-gradient(180deg, rgba(228, 238, 249, 0.84), rgba(246, 248, 250, 0.96));
    border: 1px solid rgba(32, 131, 255, 0.12);
}
.preview-window {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--surface);
    box-shadow: 0 20px 36px rgba(9, 35, 68, 0.08);
}
.preview-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
}
.preview-traffic {
    display: inline-flex;
    gap: 6px;
}
.preview-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.preview-dot-red {
    background: #ff6b86;
}
.preview-dot-yellow {
    background: var(--warning);
}
.preview-dot-green {
    background: var(--success);
}
.preview-toolbar-pill {
    width: 124px;
    height: 12px;
    border-radius: 999px;
    background: var(--surface-muted);
}
.preview-window-body {
    display: grid;
    grid-template-columns: 56px 156px minmax(0, 1fr);
    min-height: 310px;
}
.preview-rail {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 18px 0;
    border-right: 1px solid var(--line);
    background: #fbfcfe;
}
.preview-rail-button {
    width: 36px;
    height: 36px;
    border-radius: 999px;
    background: var(--surface-muted);
}
.preview-rail-button.is-active {
    background: var(--accent);
}
.preview-sidebar {
    display: grid;
    align-content: start;
    gap: 18px;
    padding: 16px;
    border-right: 1px solid var(--line);
    background: var(--surface);
}
.preview-sidebar-group {
    display: grid;
    gap: 10px;
}
.preview-sidebar-label,
.preview-sidebar-item,
.preview-search,
.preview-badge,
.preview-summary-title,
.preview-summary-value,
.preview-row-line,
.preview-status-pill {
    display: block;
    border-radius: 999px;
    background: var(--surface-muted);
}
.preview-sidebar-label {
    width: 60%;
    height: 8px;
}
.preview-sidebar-label.short {
    width: 42%;
}
.preview-sidebar-item {
    height: 34px;
    border-radius: 10px;
}
.preview-sidebar-item.short {
    width: 74%;
}
.preview-sidebar-item.is-active {
    background: var(--surface-blue);
    border: 1px solid rgba(32, 131, 255, 0.15);
}
.preview-main {
    display: grid;
    align-content: start;
    gap: 16px;
    padding: 16px;
    background: var(--surface-muted);
}
.preview-main-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.preview-search {
    width: 58%;
    height: 34px;
    border-radius: 10px;
}
.preview-badge {
    width: 84px;
    height: 34px;
    border-radius: 10px;
    background: var(--surface-blue);
}
.preview-summary {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}
.preview-summary-card {
    display: grid;
    gap: 10px;
    padding: 14px 12px;
    border-radius: 14px;
    background: var(--surface);
    border: 1px solid var(--line);
}
.preview-summary-title {
    width: 62%;
    height: 8px;
}
.preview-summary-value {
    width: 72%;
    height: 14px;
    background: rgba(32, 131, 255, 0.16);
}
.preview-list {
    display: grid;
    gap: 10px;
}
.preview-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface);
}
.preview-row-lines {
    display: grid;
    gap: 8px;
    flex: 1;
}
.preview-row-line {
    height: 8px;
}
.preview-row-line.wide {
    width: 78%;
}
.preview-row-line.mid {
    width: 56%;
}
.preview-row-line.short {
    width: 34%;
}
.preview-status-pill {
    width: 56px;
    height: 24px;
    background: rgba(92, 212, 126, 0.18);
}
.hero-panel-copy {
    display: grid;
    gap: 6px;
    padding: 2px 4px 0;
}
.eyebrow {
    margin: 0;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-faint);
}
.hero-title {
    margin: 0;
    max-width: 12ch;
    font-size: clamp(2rem, 2.7vw, 2.72rem);
    line-height: 1.08;
    letter-spacing: -0.04em;
    font-weight: 800;
    text-wrap: balance;
}
html[lang="zh-CN"] .hero-title {
    max-width: 11ch;
    font-size: clamp(1.76rem, 1.94vw, 2.08rem);
    line-height: 1.16;
    letter-spacing: -0.03em;
}
.hero-description,
.section-head p,
.panel-body,
.legal-summary,
.legal-entry p,
.legal-entry li,
.footer-text {
    color: var(--text-soft);
    line-height: 1.72;
}
.hero-description {
    max-width: 32ch;
    margin: 0;
    font-size: 0.98rem;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 0;
}
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 16px;
    border-radius: 10px;
    border: 1px solid transparent;
    font-size: 0.92rem;
    font-weight: 700;
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background var(--transition),
        color var(--transition),
        border-color var(--transition);
}
.button:hover,
.button:focus-visible {
    transform: translateY(-1px);
}
.button-primary {
    color: #ffffff;
    background: var(--accent);
    box-shadow: 0 10px 20px rgba(32, 131, 255, 0.22);
}
.button-primary:hover,
.button-primary:focus-visible {
    background: var(--accent-strong);
}
.button-secondary {
    color: var(--text);
    background: var(--surface);
    border-color: var(--line-strong);
}
.hero-points,
.legal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.hero-points {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-top: 4px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
}
.hero-points li,
.legal-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface-muted);
    color: var(--text);
    font-size: 0.9rem;
    line-height: 1.45;
}
.hero-points li {
    width: 100%;
    min-width: 0;
    min-height: 0;
    align-items: flex-start;
    padding: 12px 14px;
    border-radius: 12px;
    background: var(--surface-muted);
    font-size: 0.84rem;
    line-height: 1.46;
}
.hero-points li::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    flex: none;
}
.hero-points li::before { margin-top: 5px; }
.panel-kicker {
    margin: 0;
    color: var(--text-faint);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.panel-body {
    margin: 0;
    max-width: 40ch;
    font-size: 0.9rem;
}
.legal-title {
    margin: 0;
    font-size: clamp(1.34rem, 2vw, 1.74rem);
    line-height: 1.22;
    letter-spacing: -0.03em;
    font-weight: 800;
}
.section-head h2,
.compact-head h2 {
    margin: 0;
    font-size: clamp(1.44rem, 2vw, 1.84rem);
    line-height: 1.18;
    letter-spacing: -0.02em;
    font-weight: 700;
}
.section-head h2,
.compact-head h2,
.section-head p:last-child {
    max-width: none;
}
html[lang="zh-CN"] .section-head h2,
html[lang="zh-CN"] .compact-head h2 {
    font-size: clamp(1.28rem, 1.7vw, 1.58rem);
    line-height: 1.24;
}
.stats-strip {
    display: grid;
    gap: 16px;
    padding: 24px 26px;
}
.section-block {
    display: grid;
    gap: 16px;
}
.section-head {
    display: grid;
    gap: 8px;
    max-width: 42rem;
}
.compact-head {
    display: grid;
    gap: 8px;
}
.section-head p:last-child,
.compact-head p:last-child {
    margin-top: 0;
    color: var(--text-faint);
    max-width: 38rem;
    font-size: 0.96rem;
    line-height: 1.66;
}
.stats-grid,
.feature-grid,
.workflow-grid,
.legal-card-grid,
.faq-grid {
    display: grid;
    gap: 16px;
}
.stats-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
.feature-grid,
.legal-card-grid,
.faq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}
.workflow-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
.stat-card,
.feature-card,
.workflow-card,
.legal-link-card,
.faq-card {
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}
.stat-card {
    padding: 20px;
}
.stat-value {
    margin: 0;
    font-size: 1.7rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}
.stat-label {
    margin: 8px 0 0;
    color: var(--text-soft);
    line-height: 1.65;
}
.feature-card,
.workflow-card,
.legal-link-card,
.faq-card {
    display: grid;
    align-content: start;
    gap: 12px;
    height: 100%;
    padding: 22px;
}
.card-index,
.workflow-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--surface-blue);
    color: var(--accent);
    font-size: 0.86rem;
    font-weight: 800;
}
.feature-title,
.workflow-title,
.faq-question,
.legal-link-title {
    margin: 0;
    font-size: 1.08rem;
    line-height: 1.45;
    font-weight: 700;
}
.feature-description,
.workflow-description,
.faq-answer,
.legal-link-body {
    margin: 0;
    color: var(--text-soft);
    line-height: 1.72;
}
.workflow-card {
    background: var(--surface);
}
.legal-link-card {
    background: linear-gradient(180deg, rgba(246, 248, 250, 0.92), rgba(255, 255, 255, 0.98));
}
.site-footer {
    padding: 0 0 32px;
}
.footer-inner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    padding: 22px 24px;
}
.footer-title {
    margin: 0 0 6px;
    font-size: 0.96rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}
.footer-links a {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 0 12px;
    border-radius: 999px;
    color: var(--text-soft);
    background: var(--surface-muted);
}
.footer-links a:hover,
.footer-links a:focus-visible {
    color: var(--accent);
}
.footer-meta {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 14px;
    color: var(--text-faint);
    font-size: 0.88rem;
}
.legal-hero {
    padding: 28px;
}
.legal-summary {
    max-width: 72ch;
    margin: 14px 0 0;
}
.legal-meta {
    margin-top: 18px;
}
.legal-meta-item {
    background: var(--surface-muted);
    font-size: 0.9rem;
}
.legal-layout {
    display: grid;
    grid-template-columns: minmax(240px, 280px) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}
.legal-toc-card {
    position: sticky;
    top: 104px;
    padding: 18px;
}
.toc-title {
    margin: 0 0 12px;
    color: var(--text-faint);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.legal-toc {
    display: grid;
    gap: 8px;
}
.legal-toc a {
    display: block;
    padding: 12px 14px;
    border-radius: 12px;
    color: var(--text-soft);
    background: var(--surface-muted);
    transition:
        color var(--transition),
        background var(--transition),
        transform var(--transition);
}
.legal-toc a:hover,
.legal-toc a:focus-visible {
    color: var(--accent);
    background: var(--surface-blue);
    transform: translateX(2px);
}
.legal-document {
    display: grid;
    gap: 14px;
}
.legal-entry {
    padding: 22px 24px;
    background: rgba(255, 255, 255, 0.92);
}
.legal-entry h2 {
    margin: 0 0 14px;
    font-size: 1.28rem;
    line-height: 1.35;
    font-weight: 800;
}
.legal-entry p,
.legal-entry ul {
    margin: 0;
}
.legal-entry ul {
    padding-left: 20px;
}
.legal-entry li + li,
.legal-entry p + p,
.legal-entry p + ul,
.legal-entry ul + p {
    margin-top: 12px;
}
[data-reveal] {
    opacity: 0;
    transform: translateY(14px);
    transition:
        opacity 460ms ease,
        transform 460ms ease;
}
[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
}
@media (max-width: 1100px) {
    .hero-grid, .legal-layout, .hero-points { grid-template-columns: 1fr; }
    .legal-toc-card { position: static; }
}
@media (max-width: 920px) {
    .header-inner {
        flex-wrap: wrap;
    }
    .site-nav {
        order: 3;
        width: 100%;
        justify-content: space-between;
        overflow-x: auto;
    }
    .stats-strip,
    .section-block,
    .stats-grid,
    .feature-grid,
    .workflow-grid,
    .legal-card-grid,
    .faq-grid,
    .preview-summary {
        grid-template-columns: 1fr;
    }
    .preview-window-body {
        grid-template-columns: 48px 132px minmax(0, 1fr);
    }
}
@media (max-width: 720px) {
    .site-header {
        padding-top: 12px;
    }
    .header-inner,
    .page-shell,
    .footer-inner,
    .footer-meta {
        width: min(calc(100% - 20px), var(--max-width));
    }
    .header-inner,
    .hero-grid,
    .stats-strip,
    .feature-card,
    .workflow-card,
    .legal-link-card,
    .faq-card,
    .legal-hero,
    .legal-toc-card,
    .legal-entry,
    .footer-inner {
        padding-left: 18px;
        padding-right: 18px;
    }
    .page-shell {
        padding: 22px 0 64px;
    }
    .hero-grid, .stats-strip,
    .legal-hero,
    .legal-toc-card,
    .legal-entry,
    .footer-inner {
        padding-top: 18px;
        padding-bottom: 18px;
    }
    .footer-inner,
    .footer-meta {
        flex-direction: column;
    }
    .preview-window-body {
        grid-template-columns: 42px 110px minmax(0, 1fr);
        min-height: 256px;
    }
    .preview-main,
    .preview-sidebar {
        padding: 12px;
    }
    .preview-toolbar {
        padding: 12px;
    }
}
@media (max-width: 560px) {
    .site-nav { gap: 6px; }
    .site-nav a, .language-switch button, .footer-links a { padding: 0 10px; }
    .hero-title { max-width: none; font-size: 1.64rem; }
    html[lang="zh-CN"] .hero-title { font-size: 1.52rem; }
    .section-head h2, .compact-head h2 { max-width: none; font-size: 1.12rem; }
    html[lang="zh-CN"] .section-head h2, html[lang="zh-CN"] .compact-head h2 { font-size: 1.04rem; }
    .preview-window-body {
        grid-template-columns: 1fr;
    }
    .preview-rail {
        flex-direction: row;
        justify-content: center;
        padding: 10px 0;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }
    .preview-sidebar {
        display: none;
    }
}
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    [data-reveal] {
        opacity: 1;
        transform: none;
    }
}