/* 91wa-blog.cloud content-first theme */
:root{--brand:#6D28D9;--brand-soft:#A78BFA;--ink:#27242D;--muted:#716B78;--deep:#17151C;--paper:#F7F5FA;--panel:#ECE8F2;--accent:#F59E0B;--white:#fff;--line:#dcd6e4;--shadow:0 18px 48px rgba(37,24,52,.10);--radius:22px;--content:1180px;--reading:780px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);line-height:1.75}img{max-width:100%;height:auto;display:block}a{color:var(--brand);text-decoration-thickness:.08em;text-underline-offset:.18em}a:hover{color:#541db0}button,input,textarea{font:inherit}.skip-link{position:fixed;left:16px;top:-90px;z-index:1000;background:var(--deep);color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:16px}.site-header{position:sticky;top:0;z-index:50;background:rgba(247,245,250,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(220,214,228,.88)}.header-inner{width:min(var(--content),calc(100% - 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