.col-header{border-bottom:1px solid var(--border);background:#fff;padding:18px 0}.col-header .w{justify-content:space-between;align-items:center;display:flex}.col-header .brand{color:var(--ink);align-items:center;gap:10px;font-size:16px;font-weight:900;display:flex}.col-header .brand-mark{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-radius:8px;justify-content:center;align-items:center;width:30px;height:30px;font-size:14px;font-weight:900;display:flex}.col-header .home-link{color:var(--muted);font-size:13.5px;font-weight:700}.col-header .home-link:hover{color:var(--primary)}.col-wrap{max-width:860px;margin:0 auto;padding:48px 24px 80px}.col-wrap.list{max-width:920px}.col-list-title{letter-spacing:-.01em;margin-bottom:8px;font-size:32px;font-weight:900}.col-list-lead{color:var(--muted);margin-bottom:36px;font-size:15px;line-height:1.8}.col-card{border:1px solid var(--border);background:#fff;border-radius:14px;margin-bottom:16px;padding:24px 26px;transition:transform .2s,box-shadow .2s;display:block}.col-card:hover{border-color:var(--accent-soft);transform:translateY(-2px);box-shadow:0 12px 30px #1e40af14}.col-card .date{color:var(--muted2);letter-spacing:.06em;font-size:12px;font-weight:700}.col-card h3{color:var(--ink);margin:6px 0 8px;font-size:19px;font-weight:900;line-height:1.5}.col-card p{color:var(--muted);font-size:14px;line-height:1.75}.col-article{border:1px solid var(--border);background:#fff;border-radius:16px;padding:48px 56px;box-shadow:0 12px 40px #0f172a0d}.col-meta{color:var(--muted2);letter-spacing:.06em;margin-bottom:12px;font-size:12.5px;font-weight:700}.col-article h1{letter-spacing:-.01em;margin-bottom:28px;font-size:30px;font-weight:900;line-height:1.4}.col-article h2{border-top:none;margin:40px 0 14px;padding-top:8px;font-size:22px;font-weight:900}.col-article h3{margin:28px 0 10px;font-size:18px;font-weight:800}.col-article p{color:var(--ink);margin-bottom:16px;font-size:15.5px;line-height:1.95}.col-article ul,.col-article ol{margin:14px 0 22px;padding-left:24px}.col-article li{color:var(--ink);margin-bottom:6px;font-size:15.5px;line-height:1.85}.col-article strong{color:var(--primary-dark);font-weight:800}.col-article a{color:var(--primary);text-underline-offset:3px;text-decoration:underline;text-decoration-thickness:1px}.col-article a:hover{color:var(--accent)}.col-article hr{border:none;border-top:1px solid var(--border);margin:36px 0}.col-article blockquote{border-left:3px solid var(--accent);background:var(--accent-softer);color:var(--ink);border-radius:0 10px 10px 0;margin:20px 0;padding:14px 22px;font-size:15px}.col-article code{background:var(--bg2);border-radius:4px;padding:2px 6px;font-family:SFMono-Regular,Menlo,Consolas,monospace;font-size:13.5px}.col-article pre{background:var(--bg-dark);color:#e2e8f0;border-radius:10px;margin:20px 0;padding:18px 22px;font-size:13.5px;overflow-x:auto}.col-article pre code{color:inherit;background:0 0;padding:0}.col-back{color:var(--primary);align-items:center;gap:6px;margin-top:32px;font-size:13.5px;font-weight:700;display:inline-flex}.col-back:hover{color:var(--accent)}.col-cta{background:linear-gradient(135deg,var(--bg-dark),var(--bg-dark2));color:#fff;text-align:center;border-radius:14px;margin-top:48px;padding:32px}.col-cta h3{color:#fff;margin-bottom:10px;font-size:20px;font-weight:900}.col-cta p{color:#ffffffb3;margin-bottom:18px;font-size:14px}.col-cta a{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-radius:100px;padding:12px 28px;font-size:14px;font-weight:700;display:inline-block;box-shadow:0 8px 24px #1e40af4d}@media (max-width:760px){.col-article{padding:32px 24px}.col-article h1{font-size:24px}.col-list-title{font-size:26px}}