:root {
    --bg: #06070B;
    --bg-raise: #0C0E14;
    --ink: #F4F6F8;
    --muted: #C5CDD8;
    --faint: #8ECAFF;
    --line: rgba(255, 255, 255, 0.14);
    --glass: rgba(255, 255, 255, 0.045);
    --header: 68px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "Segoe UI Mono", Consolas, monospace;
    color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.65;
    background:
        radial-gradient(900px 520px at 88% -8%, rgba(142, 202, 255, 0.16), transparent 58%),
        radial-gradient(720px 480px at -10% 18%, rgba(124, 108, 255, 0.12), transparent 55%),
        var(--bg);
}
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: radial-gradient(ellipse at 50% 20%, #000 20%, transparent 75%);
}
img { max-width: 100%; height: auto; }
a { color: #D7ECFF; }
a:hover { color: #FFFFFF; }
h1, h2, h3 { line-height: 1.2; font-weight: 560; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 5vw, 4.4rem); margin: 0 0 16px; }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.25rem); margin: 0 0 16px; }
h3 { font-size: 1.05rem; margin: 0 0 8px; letter-spacing: 0; }
p { margin: 0 0 14px; }
button, summary, .btn { cursor: pointer; }
:focus-visible { outline: 2px solid #8ECAFF; outline-offset: 3px; }

.skip-link {
    position: absolute;
    left: 16px;
    top: -48px;
    z-index: 30;
    background: #F4F6F8;
    color: #111318;
    padding: 8px 14px;
    border-radius: 8px;
    text-decoration: none;
}
.skip-link:focus { top: 8px; }

.wrap { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    min-height: var(--header);
    background: rgba(6, 7, 11, 0.72);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(18px);
}
.nav {
    min-height: var(--header);
    display: flex;
    align-items: center;
    gap: 20px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    font-weight: 620;
    letter-spacing: -0.02em;
    text-decoration: none;
    white-space: nowrap;
}
.brand:hover { color: #FFFFFF; }
.brand-mark {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, #FFFFFF, #8ECAFF 42%, transparent 70%);
    box-shadow: 0 0 16px rgba(142, 202, 255, 0.8);
}
.nav-list {
    display: flex;
    gap: 4px 18px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.nav-list a {
    color: var(--muted);
    text-decoration: none;
    font-size: 14px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
}
.nav-list a:hover,
.nav-list a[aria-current="page"] { color: #FFFFFF; }
.nav-tools { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    color: var(--ink);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 18px;
    border-radius: 999px;
    border: 1px solid transparent;
    text-decoration: none;
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}
.btn-cta {
    background: #F4F6F8;
    color: #111318;
}
.btn-cta:hover { background: #FFFFFF; color: #111318; }
.btn-ghost {
    background: transparent;
    color: var(--ink);
    border-color: var(--line);
}
.btn-ghost:hover { border-color: rgba(255, 255, 255, 0.4); color: #FFFFFF; }

.glass {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.03));
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16), 0 24px 60px rgba(0, 0, 0, 0.28);
    backdrop-filter: blur(18px);
}

.kicker {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 12px;
    color: var(--faint);
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}
.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #8ECAFF;
    box-shadow: 0 0 0 6px rgba(142, 202, 255, 0.16);
}
.section-lead { max-width: 40rem; color: var(--muted); }

.hero { padding: 56px 0 24px; }
.hero-grid {
    display: grid;
    gap: 36px;
    align-items: center;
}
.hero-lead { max-width: 38rem; color: var(--muted); font-size: 1.05rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 8px 0 28px; }
.hero-metrics {
    display: flex;
    gap: 28px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.hero-metrics strong {
    display: block;
    font-size: 1.6rem;
    letter-spacing: -0.04em;
    font-weight: 560;
}
.hero-metrics .unit { margin-left: 2px; font-size: 0.85rem; color: var(--faint); }
.hero-metrics span { color: var(--muted); font-size: 13px; }

.console {
    padding: 16px 16px 12px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 30px 80px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(22px);
}
.console-bar,
.telemetry li {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.04em;
}
.console-bar { color: var(--muted); padding: 0 4px 8px; }
.orbit-stage { display: grid; place-items: center; min-height: 180px; }
.orbit-svg { width: min(100%, 320px); height: auto; }
.orbit-svg ellipse,
.orbit-svg circle { fill: none; stroke: rgba(142, 202, 255, 0.55); stroke-width: 1; }
.orbit-svg .node { fill: #F4F6F8; stroke: none; }
.telemetry { list-style: none; margin: 0; padding: 4px 4px 0; }
.telemetry li {
    padding: 8px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--muted);
}
.telemetry em { font-style: normal; color: #F4F6F8; }
.console-note { margin: 10px 4px 4px; color: var(--muted); font-size: 12px; }

.band { padding: 72px 0; scroll-margin-top: calc(var(--header) + 12px); }
.band-quiet { background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent); }
.cap-grid, .module-grid, .news-grid {
    display: grid;
    gap: 14px;
}
.cap-card, .module-card, .news-card, .card, .side-card {
    padding: 20px;
    min-width: 0;
}
.cap-card p:last-child,
.module-card p:last-child,
.news-card p:last-child,
.card p:last-child { margin-bottom: 0; }
.cap-icon {
    display: inline-flex;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: #D7ECFF;
    background: rgba(142, 202, 255, 0.08);
    border: 1px solid rgba(142, 202, 255, 0.18);
    margin-bottom: 14px;
}
.cap-kicker, .module-index {
    margin: 0 0 6px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--faint);
}
.module-card { position: relative; }
.module-index { position: absolute; top: 18px; right: 18px; }

.process-grid { display: grid; gap: 32px; align-items: start; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.steps li {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 14px;
    padding: 16px 0;
    border-top: 1px solid var(--line);
}
.steps span {
    font-family: var(--mono);
    color: var(--faint);
    letter-spacing: 0.08em;
}
.steps p { margin: 0; color: var(--muted); }

.faq-wrap { max-width: 760px; }
.faq-list details {
    border-top: 1px solid var(--line);
}
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary {
    min-height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    font-weight: 600;
    list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
    content: "+";
    font-family: var(--mono);
    color: var(--faint);
}
.faq-list details[open] summary::after { content: "–"; }
.faq-list details p { color: var(--muted); }

.meta { color: var(--muted); font-size: 13px; font-family: var(--mono); }
.news-card h3 a, .card h2 a, .related-list a { color: var(--ink); text-decoration: none; }
.news-card h3 a:hover, .card h2 a:hover, .related-list a:hover { color: #D7ECFF; }

.closing { padding-top: 12px; }
.closing-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 28px;
}
.closing-card h2 { margin: 0; }

.layout {
    display: grid;
    gap: 28px;
    padding: 36px 0 64px;
}
.stack { display: grid; gap: 14px; align-content: start; }
.page-head p, .error-page p { color: var(--muted); }
.error-page { padding: 72px 0 96px; }
.article-title { font-size: clamp(1.8rem, 3vw, 2.6rem); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.tag {
    color: var(--muted);
    text-decoration: none;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 13px;
}
.tag:hover { color: #FFFFFF; border-color: rgba(255, 255, 255, 0.35); }
.prose { color: var(--ink); max-width: 68ch; }
.prose h2, .prose h3 { margin-top: 1.4em; }
.prose a { color: #D7ECFF; }
.prose img { border-radius: 12px; }
.share { display: flex; align-items: center; gap: 8px; margin: 28px 0; }
.post-nav, .related-list { display: grid; gap: 12px; }
.post-nav-link {
    display: block;
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--line);
    color: var(--ink);
    text-decoration: none;
}
.post-nav-link span { display: block; color: var(--faint); font-family: var(--mono); font-size: 12px; }
.related-list { list-style: none; margin: 0; padding: 0; }
.related-list li { padding: 12px 0; border-top: 1px solid var(--line); }
.side-card h2 { font-size: 1.25rem; }
.side-card { align-self: start; position: sticky; top: calc(var(--header) + 16px); }

.crumbs { padding-top: 16px; }
.crumbs ol { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; color: var(--muted); font-size: 13px; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs li + li::before { content: "/"; margin-right: 8px; color: rgba(255, 255, 255, 0.35); }

.pagination { display: flex; gap: 8px; list-style: none; padding: 12px 0 0; margin: 0; flex-wrap: wrap; }
.page-link {
    display: inline-flex;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    padding: 0 12px;
    border-radius: 12px;
    border: 1px solid var(--line);
    color: var(--ink);
    text-decoration: none;
}
.page-item.active .page-link { background: #F4F6F8; color: #111318; }

.site-footer {
    border-top: 1px solid var(--line);
    padding: 48px 0 28px;
    background: rgba(0, 0, 0, 0.28);
}
.footer-grid { display: grid; gap: 28px; margin-bottom: 20px; }
.site-footer h2 { font-size: 0.95rem; letter-spacing: 0; }
.site-footer p, .site-footer a { color: var(--muted); }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 0 0 8px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: #FFFFFF; }
.legal { border-top: 1px solid var(--line); padding-top: 16px; font-size: 13px; }
.friend-links-section { border-top: 1px solid var(--line); padding-top: 18px; margin-bottom: 16px; }
.friend-links-section h2 { font-size: 12px; color: var(--muted); letter-spacing: 0.12em; text-transform: uppercase; font-family: var(--mono); }
.friend-links { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.friend-links a { font-size: 14px; }

@media (min-width: 760px) {
    .cap-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .post-nav, .related-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 980px) {
    .hero-grid { grid-template-columns: 1.15fr 0.85fr; }
    .cap-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .module-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .process-grid { grid-template-columns: 0.9fr 1.1fr; }
    .layout { grid-template-columns: minmax(0, 1fr) 280px; align-items: start; }
    .footer-grid { grid-template-columns: 1.4fr 0.8fr 0.8fr; }
}

@media (max-width: 860px) {
    .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
    .nav-panel {
        display: none;
        position: absolute;
        left: 0;
        right: 0;
        top: var(--header);
        background: rgba(8, 9, 14, 0.96);
        border-bottom: 1px solid var(--line);
        padding: 8px 20px 16px;
    }
    .nav-panel.is-open { display: block; }
    .nav-list { flex-direction: column; gap: 0; }
    .hero-metrics { flex-wrap: wrap; }
    .closing-card { flex-direction: column; align-items: flex-start; }
    .side-card { position: static; }
}

@media (max-width: 640px) {
    .wrap { width: min(1160px, calc(100% - 28px)); }
    .hero { padding-top: 32px; }
    .band { padding: 52px 0; }
    .hero-actions .btn, .closing-card .btn, .side-card .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .btn, .status-dot { transition: none; }
    .status-dot { box-shadow: none; }
}