:root {
    color-scheme: dark;
    --bg: #030712;
    --surface: rgba(255, 255, 255, 0.035);
    --surface-strong: rgba(255, 255, 255, 0.065);
    --border: rgba(255, 255, 255, 0.1);
    --text: #f8fafc;
    --muted: #a1a1aa;
    --brand: #818cf8;
    --brand-soft: rgba(99, 102, 241, 0.16);
    --purple: #c084fc;
    --green: #34d399;
    --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 50% 0%, rgba(79, 70, 229, .2), transparent 34rem),
        var(--bg);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid var(--border);
    background: rgba(3, 7, 18, .82);
    backdrop-filter: blur(18px);
}
.nav {
    width: min(var(--max), calc(100% - 32px));
    min-height: 72px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    text-decoration: none;
    white-space: nowrap;
}
.brand img { width: 34px; height: 34px; border-radius: 11px; }
.brand span {
    background: linear-gradient(135deg, #a5b4fc, #818cf8 50%, #c084fc);
    -webkit-background-clip: text;
    color: transparent;
}
.nav-links { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; }
.nav-links a { color: #d4d4d8; font-size: 14px; text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: #fff; }
.nav-links .nav-cta {
    padding: 8px 16px;
    color: #111827;
    background: #fff;
    border-radius: 999px;
    font-weight: 700;
}

.page-shell { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.hero { padding: 96px 0 64px; max-width: 850px; }
.eyebrow {
    margin: 0 0 12px;
    color: var(--brand);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .14em;
    text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.25; letter-spacing: -.025em; }
h1 { margin: 0 0 24px; font-size: clamp(38px, 7vw, 70px); }
h2 { margin: 0 0 18px; font-size: clamp(28px, 4vw, 42px); }
h3 { margin: 0 0 10px; font-size: 21px; }
p { margin: 0 0 18px; }
.lead { color: #d4d4d8; font-size: clamp(18px, 2.5vw, 23px); line-height: 1.75; }
.meta { color: #71717a; font-size: 14px; }
.hero-actions, .card-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 20px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface-strong);
    font-weight: 700;
    text-decoration: none;
}
.button-primary { color: #111827; background: #fff; }

.section { padding: 68px 0; border-top: 1px solid rgba(255,255,255,.065); }
.section-intro { max-width: 720px; margin-bottom: 34px; color: var(--muted); }
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card, .answer-box, .article-body {
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 26px;
}
.card { padding: 28px; }
.card p:last-child { margin-bottom: 0; }
.card-label { color: var(--brand); font-size: 12px; font-weight: 800; letter-spacing: .1em; }
.card-link { color: #c7d2fe; font-weight: 700; text-decoration: none; }
.card-link:hover { color: #fff; }
.answer-box { padding: 28px; margin: 28px 0 40px; background: var(--brand-soft); }
.answer-box p:last-child { margin-bottom: 0; }

.article-layout { display: grid; grid-template-columns: minmax(0, 760px) 260px; gap: 44px; align-items: start; padding-bottom: 80px; }
.article-body { padding: clamp(24px, 5vw, 52px); }
.article-body h2 { margin-top: 54px; }
.article-body h3 { margin-top: 34px; }
.article-body ul, .article-body ol { padding-left: 23px; color: #d4d4d8; }
.article-body li { margin: 8px 0; }
.article-body a { color: #c7d2fe; }
.article-aside { position: sticky; top: 100px; }
.aside-card { padding: 22px; border: 1px solid var(--border); border-radius: 22px; background: var(--surface); }
.aside-card a { display: block; margin: 10px 0; color: #d4d4d8; text-decoration: none; }
.aside-card a:hover { color: #fff; }
.breadcrumb { padding-top: 28px; color: #71717a; font-size: 14px; }
.breadcrumb a { color: #a1a1aa; text-decoration: none; }

.flow { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; counter-reset: steps; }
.flow-five { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.flow-step { position: relative; padding: 22px 18px; border: 1px solid var(--border); border-radius: 20px; background: var(--surface); }
.flow-step::before { counter-increment: steps; content: "0" counter(steps); display: block; margin-bottom: 18px; color: var(--brand); font-size: 12px; font-weight: 800; }
.flow-step:not(:last-child)::after { content: "→"; position: absolute; right: -11px; top: 50%; z-index: 2; color: #71717a; }
.flow-step strong { display: block; line-height: 1.45; }

.faq-list { display: grid; gap: 14px; }
details { border: 1px solid var(--border); border-radius: 20px; background: var(--surface); }
summary { padding: 22px 24px; cursor: pointer; font-size: 18px; font-weight: 750; }
.faq-answer { padding: 0 24px 24px; color: #d4d4d8; }
.faq-answer p:last-child, .faq-answer ul:last-child { margin-bottom: 0; }

.tag { display: inline-flex; padding: 4px 10px; border: 1px solid rgba(129,140,248,.25); border-radius: 999px; color: #c7d2fe; background: rgba(99,102,241,.09); font-size: 12px; }
.note { padding: 20px 22px; border-left: 3px solid var(--green); border-radius: 0 16px 16px 0; background: rgba(52,211,153,.08); color: #d4d4d8; }
.article-visual { margin: 32px 0 44px; padding: clamp(20px, 4vw, 34px); border: 1px solid var(--border); border-radius: 26px; background: linear-gradient(145deg, rgba(99,102,241,.13), rgba(255,255,255,.025)); }
.article-visual figcaption { margin-top: 18px; color: #71717a; font-size: 13px; text-align: center; }
.tool-map { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.tool-node { padding: 22px; border: 1px solid var(--border); border-radius: 20px; background: rgba(3,7,18,.62); }
.tool-node span { display: block; margin-bottom: 10px; color: var(--brand); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.tool-node strong { display: block; margin-bottom: 8px; font-size: 18px; }
.tool-node p { margin: 0; color: var(--muted); font-size: 14px; }
.article-image { display: block; width: 100%; margin: 28px 0 12px; border: 1px solid var(--border); border-radius: 22px; background: #f8fafc; }
.comparison-table { width: 100%; margin: 24px 0; border-collapse: collapse; overflow: hidden; border: 1px solid var(--border); border-radius: 18px; }
.comparison-table th, .comparison-table td { padding: 16px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.comparison-table th { color: #c7d2fe; background: rgba(99,102,241,.09); }
.comparison-table tr:last-child td { border-bottom: 0; }

.site-footer { border-top: 1px solid var(--border); color: #71717a; }
.footer-inner { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; padding: 36px 0; display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-links a { color: #a1a1aa; text-decoration: none; }

@media (max-width: 900px) {
    .nav { padding: 14px 0; align-items: flex-start; }
    .nav-links { justify-content: flex-end; gap: 12px 16px; }
    .article-layout { grid-template-columns: 1fr; }
    .article-aside { position: static; }
    .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .flow-step::after { display: none; }
}
@media (max-width: 680px) {
    .nav { align-items: center; }
    .nav-links a:not(.nav-cta) { display: none; }
    .hero { padding-top: 64px; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .flow { grid-template-columns: 1fr; }
    .tool-map { grid-template-columns: 1fr; }
    .comparison-table, .comparison-table tbody, .comparison-table tr, .comparison-table th, .comparison-table td { display: block; width: 100%; }
    .comparison-table th { border-bottom: 0; }
    .article-body { border-left: 0; border-right: 0; border-radius: 0; }
    .article-layout { width: calc(100% + 32px); margin-left: -16px; gap: 28px; }
    .article-aside { padding: 0 16px; }
}

/* Blog 通用文章结构：在 body 上添加 blog-article 即可启用。 */
body.blog-article {
    line-height: 1.8;
}
.blog-article .site-header {
    z-index: 100;
    background: rgba(3, 7, 18, .82);
    backdrop-filter: blur(10px);
    border-bottom-color: rgba(255,255,255,.065);
}
.blog-article .nav {
    width: auto;
    max-width: 1080px;
    min-height: 0;
    padding: 16px 24px;
}
.blog-article .brand { gap: 8px; font-size: 1.1rem; }
.blog-article .brand img { width: auto; height: 26px; border-radius: 0; }
.blog-article .nav-links { gap: 20px; }
.blog-article .nav-links a { color: #a1a1aa; font-size: .95rem; }
.blog-article .nav-links a:hover,
.blog-article .nav-links a[aria-current="page"] { color: #f8fafc; font-weight: 600; }
.blog-article .nav-links .nav-cta { padding: 8px 18px; color: #111827; background: #fff; font-weight: 500; }

.blog-article .page-shell {
    width: auto;
    max-width: 1040px;
    margin: 0 auto;
    padding: 32px 24px 80px;
}
.blog-article .breadcrumb { padding-top: 0; margin-bottom: 24px; font-size: .875rem; }
.blog-article .hero {
    max-width: none;
    padding: 0 0 32px;
    margin-bottom: 36px;
    border-bottom: 1px solid rgba(255,255,255,.065);
}
.blog-article .hero h1 {
    margin: 16px 0;
    color: #f8fafc;
    font-size: 2.1rem;
    font-weight: 800;
    line-height: 1.35;
    letter-spacing: -.02em;
}
.blog-article .hero .lead { margin-bottom: 16px; color: #a1a1aa; font-size: 1.1rem; line-height: 1.6; }
.blog-article .hero .meta { color: #71717a; font-size: .85rem; }

.blog-article .article-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 48px;
    padding-bottom: 0;
}
.blog-article .article-body { padding: 0; background: transparent; border: 0; border-radius: 0; }
.blog-article .article-body h2 {
    margin: 44px 0 18px;
    padding-bottom: 8px;
    color: #f8fafc;
    border-bottom: 1px solid rgba(255,255,255,.065);
    font-size: 1.45rem;
    font-weight: 700;
}
.blog-article .article-body h3 { margin: 28px 0 12px; color: #f8fafc; font-size: 1.15rem; font-weight: 600; }
.blog-article .article-body p { margin-bottom: 18px; color: #d4d4d8; font-size: 1rem; }
.blog-article .article-body ul,
.blog-article .article-body ol { margin-bottom: 20px; padding-left: 20px; color: #d4d4d8; }
.blog-article .article-body li { margin: 0 0 6px; }
.blog-article .article-body a { color: #f8fafc; font-weight: 600; text-decoration: underline; }

.blog-article .article-visual { margin: 32px 0; padding: 0; background: transparent; border: 0; border-radius: 0; }
.blog-article .article-visual figcaption { margin-top: 18px; color: #71717a; font-size: .8rem; }
.blog-article .tool-map { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.blog-article .tool-node { padding: 20px; border-radius: 12px; }

.blog-article .flow,
.blog-article .flow-five {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 20px;
    background: rgba(255,255,255,.035);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 12px;
}
.blog-article .flow-step {
    position: static;
    padding: 6px 12px;
    color: #f8fafc;
    background: rgba(3,7,18,.62);
    border-radius: 6px;
    font-size: .85rem;
}
.blog-article .flow-step::before { display: none; }
.blog-article .flow-step:not(:last-child)::after {
    content: "→";
    position: static;
    display: inline;
    margin-left: 10px;
    color: #71717a;
}

.blog-article .answer-box {
    margin: 28px 0;
    padding: 20px 24px;
    border-left: 4px solid #818cf8;
    border-radius: 6px;
}
.blog-article .answer-box p { margin: 0; }
.blog-article .answer-box p:first-child { margin-bottom: 6px; }
.blog-article .note { margin: 16px 0; padding: 16px 18px; font-size: .85rem; }
.blog-article .article-body .button {
    min-height: 0;
    padding: 10px 22px;
    color: #f8fafc;
    border-radius: 99px;
    font-size: .9rem;
    text-decoration: none;
}
.blog-article .article-body .button-primary {
    color: #111827;
    background: #fff;
    border-color: #fff;
}
.blog-article .article-aside { top: 90px; }
.blog-article .aside-card { display: flex; flex-direction: column; gap: 16px; padding: 20px; border-radius: 12px; }
.blog-article .aside-card strong { margin-bottom: 4px; }
.blog-article .aside-card a { margin: 0; font-size: .88rem; line-height: 1.5; }

.blog-article .site-footer { margin-top: 60px; padding: 32px 24px; background: rgba(3,7,18,.45); }
.blog-article .footer-inner { width: auto; max-width: 1040px; padding: 0; align-items: center; font-size: .85rem; }

@media (max-width: 840px) {
    .blog-article .article-layout { grid-template-columns: minmax(0, 1fr); }
    .blog-article .article-aside { position: static; }
}
@media (max-width: 680px) {
    .blog-article .page-shell { padding-right: 16px; padding-left: 16px; }
    .blog-article .hero { padding-top: 0; }
    .blog-article .hero h1 { font-size: 1.8rem; }
    .blog-article .article-layout { width: auto; margin-left: 0; }
    .blog-article .article-aside { padding: 0; }
}