:root{--blue:#0b5fff;--grad:linear-gradient(135deg,#0b5fff,#2f80ff 50%,#00b4d8);--text:#1a2332;--muted:#5b6b84;--line:#e6edf7;--bg:#f6f9ff}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);line-height:1.85;background:#fff}
a{color:var(--blue);text-decoration:none}
.container{width:min(820px,calc(100% - 40px));margin:0 auto}
.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;justify-content:space-between;align-items:center;padding:12px 0;width:min(1080px,calc(100% - 40px));margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;color:var(--text)}
.logo i{width:34px;height:34px;border-radius:10px;background:var(--grad);color:#fff;display:grid;place-items:center}
.btn{display:inline-flex;align-items:center;background:var(--grad);color:#fff!important;padding:10px 18px;border-radius:999px;font-weight:800;font-size:14px}
.hero{padding:48px 0 24px;background:var(--bg);border-bottom:1px solid var(--line)}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:14px}
.breadcrumb a{color:var(--muted)}
.hero h1{font-size:clamp(26px,4vw,36px);line-height:1.35;font-weight:900;margin-bottom:12px}
.meta{color:var(--muted);font-size:13.5px}
article{padding:36px 0 60px}
article h2{font-size:22px;margin:32px 0 12px}
article h3{font-size:18px;margin:22px 0 10px}
article p,article li{color:#334;font-size:16px}
article ul,article ol{padding-left:1.3em;margin:10px 0 16px}
article li{margin:6px 0}
article strong{color:#0f172a}
.table-wrap{overflow-x:auto;margin:18px 0}
article table{border-collapse:collapse;width:100%;font-size:14.5px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
article th{background:var(--bg);color:#0f172a;font-weight:800;text-align:left;padding:10px 14px;border-bottom:2px solid var(--line);white-space:nowrap}
article td{padding:9px 14px;border-bottom:1px solid var(--line);color:#334;vertical-align:top}
article tr:last-child td{border-bottom:none}
article tr:hover td{background:#f8fbff}
article img{max-width:100%;border-radius:14px;margin:14px 0;display:block}
.diagram-zoom{margin:18px 0 8px;position:relative}
.diagram-zoom-btn{display:block;width:100%;padding:0;border:0;background:transparent;cursor:zoom-in;position:relative;text-decoration:none}
.diagram-zoom-btn img{margin:0;width:100%;height:auto;border:1px solid var(--line);box-shadow:0 10px 28px rgba(11,95,255,.08);pointer-events:none}
.diagram-hint{margin-top:8px;font-size:13px;color:var(--muted);text-align:center}
.archify-embed{margin:18px 0 22px}
.archify-embed iframe{display:block;width:100%;height:min(82vh,860px);border:1px solid var(--line);border-radius:14px;background:#fff}
.mermaid{background:#f8fbff;border:1px solid var(--line);border-radius:14px;padding:16px;overflow-x:auto;margin:16px 0}
.lightbox{position:fixed;inset:0;z-index:80;background:rgba(6,17,40,.88);display:none;align-items:center;justify-content:center;padding:24px}
.lightbox.open{display:flex}
.lightbox img{max-width:94vw;max-height:86vh;border-radius:12px;transform-origin:center center;cursor:grab;user-select:none}
.lightbox-close{position:fixed;top:16px;right:20px;width:40px;height:40px;border:0;border-radius:999px;background:#fff;color:#0b5fff;font-size:24px;cursor:pointer;z-index:81}
.lightbox-tip{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);color:#dbe7ff;font-size:13px;z-index:81}
article blockquote{background:var(--bg);border-left:4px solid var(--blue);border-radius:0 12px 12px 0;padding:12px 18px;margin:16px 0;color:#3a4a63}
article blockquote p{margin:0}
article pre{background:#0b1526;color:#dbe7ff;border-radius:12px;padding:16px;overflow-x:auto;margin:16px 0;font-size:14px}
article code{font-family:ui-monospace,Consolas,monospace}
article pre code{background:transparent;color:inherit;padding:0;border-radius:0;font-size:13.5px;white-space:pre}
article p code{background:#eef3fc;color:#0b5fff;padding:2px 6px;border-radius:6px;font-size:.9em}
.article-cover{width:min(820px,calc(100% - 40px));margin:-18px auto 0}
.article-cover img{width:100%;height:auto;border-radius:18px;box-shadow:var(--shadow,0 16px 50px rgba(11,95,255,.12));display:block}
.box{background:var(--bg);border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:20px 0}
.cta{margin-top:36px;padding:24px;border-radius:18px;background:linear-gradient(145deg,#061428,#0b4ea8);color:#fff}
.cta h3{color:#fff;margin:0 0 8px;font-size:20px}
.cta p{color:#c7d9f5;margin-bottom:14px}
.cta .btn{background:#fff;color:#0b5fff!important}
.footer{background:#07111f;color:#8fa3bd;padding:24px 0;font-size:13px}
.footer .wrap{width:min(1080px,calc(100% - 40px));margin:0 auto;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.footer a{color:#9fd0ff}
.faq-block{margin:40px 0 10px;padding:22px 24px;background:var(--bg);border:1px solid var(--line);border-radius:16px}
.faq-block h2{margin:0 0 14px;font-size:20px}
.faq-block details{background:#fff;border:1px solid var(--line);border-radius:12px;margin:10px 0;overflow:hidden}
.faq-block summary{cursor:pointer;padding:12px 16px;font-weight:700;font-size:15px;color:#0f172a;list-style:none;position:relative;padding-right:36px}
.faq-block summary::after{content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);color:var(--blue);font-size:18px;font-weight:900}
.faq-block details[open] summary::after{content:"-"}
.faq-block details p{margin:0;padding:0 16px 14px;color:#3a4a63;font-size:14.5px}
.related{margin:36px 0 6px;padding:20px 24px;border:1px solid var(--line);border-radius:16px;background:#fff}
.related h3{margin:0 0 10px;font-size:18px;color:#0f172a}
.related ul{list-style:none;padding:0;margin:0}
.related li{margin:7px 0;padding-left:18px;position:relative}
.related li::before{content:"→";position:absolute;left:0;color:var(--blue);font-weight:900}
.related a{color:#24406b;font-size:15px}
.related a:hover{color:var(--blue)}
.btn-ghost{background:rgba(255,255,255,.14)!important;color:#fff!important;border:1px solid rgba(255,255,255,.4);margin-left:8px}
.dir-cases{display:grid;gap:14px;margin:18px 0}
.dir-case{display:block;border:1px solid var(--line);border-radius:16px;padding:16px 18px;background:#fff;color:inherit}
.dir-case:hover{border-color:#cfe0ff;box-shadow:0 10px 28px rgba(11,95,255,.1)}
.dir-case b{display:block;font-size:16px;color:#0f172a;margin-bottom:4px}
.dir-case p{margin:0;color:var(--muted);font-size:13.5px}
.dir-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.dir-tags i{font-style:normal;padding:3px 10px;border-radius:999px;background:var(--bg);color:var(--blue);font-size:12px;font-weight:700}
.cta-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.discover{margin:8px 0 0;padding:12px 14px;border:1px dashed #cfe0ff;border-radius:12px;background:#f8fbff;font-size:13.5px;color:#3a4a63;display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center}
.discover a{font-weight:800}
.discover .sep{color:#9db0c9}