:root{--paper:#FFF8F2;--white:#FFFFFF;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--faint:#8A8298;--pink:#E11D8F;--indigo:#6366F1;--cyan:#0891B2;--amber:#D97706;--mint:#059669;--line:rgba(26,18,48,.10);--shadow:0 14px 34px rgba(26,18,48,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.78;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}.locked{overflow:hidden}.masthead{position:fixed;top:0;left:0;right:0;height:72px;background:rgba(255,248,242,.97);border-bottom:1px solid var(--line);z-index:80}.masthead-inner{max-width:1160px;height:100%;margin:auto;padding:0 20px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.square-btn,.search-btn,.close-btn{border:0;background:transparent;color:var(--ink);cursor:pointer}.square-btn{justify-self:start;width:44px;height:44px;font-size:20px;border-radius:12px}.square-btn:hover,.square-btn:focus-visible,.search-btn:hover,.search-btn:focus-visible,.close-btn:hover,.close-btn:focus-visible{outline:2px solid var(--pink);outline-offset:2px}.brand{display:flex;align-items:center;justify-content:center;min-width:120px}.brand-logo{max-height:38px;max-width:190px;object-fit:contain}.brand-text{font-weight:800;font-size:22px;color:var(--ink);letter-spacing:.08em}.mast-actions{justify-self:end;display:flex;align-items:center;gap:10px}.search-btn,.app-link{min-height:44px;display:inline-flex;align-items:center;padding:0 16px;border-radius:999px}.search-btn{font-size:14px}.app-link{background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:#fff;font-weight:700}.chapter-bar{position:fixed;top:72px;left:0;right:0;height:46px;background:#fff;border-bottom:1px solid var(--line);z-index:70;display:flex;align-items:center;justify-content:center;gap:34px}.chapter-bar a{height:46px;display:flex;align-items:center;position:relative;font-size:15px;color:var(--muted)}.chapter-bar a.active{color:var(--ink);font-weight:700}.chapter-bar a.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--pink);border-radius:3px}.site-main{padding-top:118px}.wrap{width:min(1160px,calc(100% - 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@media(max-width:560px){.wrap,.footer-inner{width:min(100% - 32px,1160px)}.hero{padding-top:30px}.vertical-label{display:none}.tag-grid,.steps,.theme-grid,.footer-grid,.preset-links{grid-template-columns:1fr}.shelf-row{grid-template-columns:1fr}.rank-row{grid-template-columns:54px 1fr}.mast-actions{gap:4px}.app-link{font-size:13px}.brand-logo{max-width:150px}.hero h1,.page-head h1{font-size:29px}.section-title{align-items:start;flex-direction:column}.book-menu,.search-card{border-radius:18px}.book-page{padding:16px 18px}.page-head{padding-top:38px}}