:root{--canvas:#efe5d2;--paper:#fffbf4e0;--paper-strong:#fffdf8;--ink:#1f2b38;--muted:#5d6a77;--accent:#b04a26;--accent-deep:#87371f;--teal:#2c746e;--navy:#2e3e4f;--line:#1f2b381f;--line-strong:#1f2b3833;--shadow:0 20px 60px #1f2b3829;--shadow-soft:0 10px 30px #1f2b381f;--radius-lg:2rem;--radius-md:1.25rem;--serif:"DM Serif Display", "Songti SC", "Noto Serif CJK SC", Georgia, serif;--sans:"IBM Plex Sans", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{min-height:100vh;color:var(--ink);font-family:var(--sans);background-blend-mode:screen;background-color:#cfc0a8;background-image:url(/bg-landscape.webp);background-position:50%;background-size:cover;background-attachment:fixed;margin:0;line-height:1.72}::selection{color:#fffaf0;background:var(--accent)}a{color:var(--teal);text-underline-offset:.18em;text-decoration-thickness:.08em}a:hover{color:var(--accent)}img{max-width:100%;height:auto}button,input,select{font:inherit}.site-shell{width:min(1120px,100% - 2rem);margin:0 auto;padding:0 0 4rem}.site-nav{justify-content:space-between;align-items:center;gap:1rem;padding:1rem 0 1.5rem;display:flex}.brand{color:inherit;letter-spacing:.09em;text-transform:uppercase;align-items:center;gap:.8rem;font-size:.82rem;font-weight:700;text-decoration:none;display:inline-flex}.brand-mark{color:#fff9ed;background:var(--navy);width:2.55rem;height:2.55rem;box-shadow:var(--shadow-soft);border-radius:.85rem;place-items:center;display:inline-grid}.nav-links{flex-wrap:wrap;justify-content:flex-end;gap:.55rem;display:flex}.nav-links a{color:var(--muted);border:1px solid #0000;border-radius:999px;padding:.58rem .9rem;font-size:.92rem;font-weight:600;text-decoration:none;transition:color .16s,border-color .16s,background .16s,transform .16s}.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--ink);border-color:var(--line);background:#ffffff8c;transform:translateY(-1px)}.surface{border-radius:var(--radius-lg);background:var(--paper);box-shadow:var(--shadow);backdrop-filter:blur(18px);border:1px solid #18263314}.eyebrow{color:var(--accent);letter-spacing:.12em;text-transform:uppercase;margin:0 0 .6rem;font-size:.76rem;font-weight:700}.display-title,h1,h2,h3{font-family:var(--serif);font-weight:400;line-height:1.12}.display-title{max-width:15ch;margin:0;font-size:clamp(2.75rem,7vw,5.8rem)}.section-title{margin:0;font-size:clamp(2rem,4.5vw,3.5rem)}.lede{max-width:68ch;color:var(--muted);font-size:clamp(1rem,2vw,1.16rem)}.muted{color:var(--muted)}.page-hero{grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:2rem;margin-bottom:1.2rem;padding:clamp(2rem,6vw,4.2rem);display:grid;overflow:hidden}.page-hero:after{content:"";aspect-ratio:1;border:1.2rem solid #c85d3b1f;border-radius:50%;width:clamp(5rem,12vw,9rem)}.page-hero .lede{margin:1rem 0 0}.post-list{gap:1rem;display:grid}.post-card{color:inherit;grid-template-columns:minmax(0,1fr) minmax(14rem,30%);align-items:center;gap:clamp(1.2rem,4vw,2.4rem);padding:clamp(1.35rem,3.5vw,2rem);display:grid}.post-card--no-cover{grid-template-columns:1fr}.post-card h2{margin:.4rem 0 .55rem;font-size:clamp(1.55rem,3vw,2.2rem)}.post-card p{color:var(--muted);margin:0}.post-card img{aspect-ratio:16/9;object-fit:cover;background:var(--canvas);border-radius:1rem;width:100%}.meta-line{color:var(--muted);flex-wrap:wrap;align-items:center;gap:.45rem .8rem;font-size:.82rem;display:flex}.tags{flex-wrap:wrap;gap:.45rem;display:flex}.tag{min-height:1.85rem;color:var(--teal);background:#226d6812;border:1px solid #226d682e;border-radius:999px;align-items:center;padding:.25rem .62rem;font-size:.75rem;font-weight:700;text-decoration:none;display:inline-flex}.tag:hover{color:var(--accent);background:#c85d3b12;border-color:#c85d3b4d}.article-shell{width:min(900px,100% - 2rem);margin:0 auto;padding-bottom:5rem}.article-header{margin-bottom:1rem;padding:clamp(1.6rem,5vw,3.6rem)}.article-header h1{margin:.65rem 0 1rem;font-size:clamp(2rem,5vw,3.2rem)}.article-cover{object-fit:cover;background:var(--canvas);border-radius:1.25rem;width:100%;max-height:31rem;margin-top:1.5rem}.article-grid{grid-template-columns:minmax(0,1fr) 15rem;align-items:start;gap:1rem;display:grid}.article-body{min-width:0;padding:clamp(1.35rem,4vw,3.1rem)}.article-body>:first-child{margin-top:0}.article-body>:last-child{margin-bottom:0}.article-body h2{margin:2.4rem 0 .85rem;scroll-margin-top:1rem;font-size:clamp(1.65rem,4vw,2.3rem)}.article-body h3{margin:1.8rem 0 .65rem;scroll-margin-top:1rem;font-size:clamp(1.3rem,3vw,1.7rem)}.article-body p,.article-body li{overflow-wrap:anywhere}.article-body blockquote{border-left:.28rem solid var(--accent);color:var(--muted);margin:1.5rem 0;padding:.15rem 0 .15rem 1.2rem}.article-body pre{color:#f7efe4;background:#17222d;border-radius:1rem;padding:1.1rem;overflow-x:auto;box-shadow:inset 0 0 0 1px #ffffff0f}.article-body code{color:#9d3f26;background:#c85d3b17;border-radius:.35em;padding:.12em .35em}.article-body pre code{color:inherit;background:0 0;padding:0}.article-body table{border-collapse:collapse;width:100%;display:block;overflow-x:auto}.article-body th,.article-body td{border:1px solid var(--line);text-align:left;padding:.65rem .8rem}.article-body th{background:#263a4c0f}.article-body hr{background:var(--line);border:0;height:1px;margin:2.4rem 0}.article-body input[type=checkbox]{accent-color:var(--teal);margin-right:.45rem}.article-body img{border-radius:.85rem;max-height:38rem;margin:1.5rem auto;display:block}.article-body .katex-display{padding:.35rem 0;overflow:auto hidden}.toc{border-radius:var(--radius-md);padding:1.2rem;position:sticky;top:1rem}.toc strong{letter-spacing:.08em;text-transform:uppercase;margin-bottom:.7rem;font-size:.78rem;display:block}.toc ol{gap:.5rem;margin:0;padding:0;list-style:none;display:grid}.toc a{color:var(--muted);font-size:.84rem;line-height:1.35;text-decoration:none}.toc a:hover{color:var(--accent)}.toc .depth-3{padding-left:.8rem}.article-actions{gap:1rem;margin-top:1rem;display:grid}.prev-next{grid-template-columns:1fr 1fr;gap:.8rem;display:grid}.action-card{color:inherit;padding:1.1rem 1.2rem;text-decoration:none;display:block}.action-card small{color:var(--muted);display:block}.action-card strong{margin-top:.25rem;display:block}.action-card--next{text-align:right}.comments{padding:clamp(1.2rem,4vw,2rem)}.list-panel{padding:clamp(1.35rem,4vw,2.2rem)}.list-panel h1{margin:0;font-size:clamp(2.1rem,5vw,3.5rem)}.list-rows{gap:.7rem;margin-top:1.5rem;display:grid}.list-row{border-top:1px solid var(--line);color:inherit;grid-template-columns:8rem minmax(0,1fr);gap:1rem;padding:1rem 0;text-decoration:none;display:grid}.list-row strong{font-size:1.02rem}.search-input,select{border:1px solid var(--line-strong);width:100%;color:var(--ink);background:var(--paper-strong);border-radius:.85rem;padding:.8rem 1rem}.search-input:focus,select:focus,button:focus-visible,a:focus-visible{outline:2px solid var(--teal);outline-offset:2px}.button{color:#fffaf0;background:var(--navy);cursor:pointer;border:0;border-radius:.8rem;justify-content:center;align-items:center;min-height:2.7rem;padding:.65rem 1rem;display:inline-flex}.button:hover{background:var(--accent-deep)}.empty-state{color:var(--muted);text-align:center;padding:2rem}.diff-line{white-space:pre-wrap;overflow-wrap:anywhere;border-radius:.3rem;padding:.16rem .55rem;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.86rem}.diff-add{background:#d7eadc}.diff-del{background:#f2d5d4}.diff-context{color:var(--muted)}.site-footer{color:var(--muted);justify-content:space-between;gap:1rem;padding:2rem 0 0;font-size:.85rem;display:flex}.site-footer div:last-child{flex-wrap:wrap;justify-content:flex-end;gap:1rem;display:flex}@media (width<=820px){.page-hero{grid-template-columns:1fr}.page-hero:after{display:none}.article-grid{grid-template-columns:1fr}.toc{order:-1;position:static}.post-card{grid-template-columns:1fr}.post-card img{order:-1}}@media (width<=640px){body{background-attachment:scroll}.site-shell,.article-shell{width:min(100% - 1rem,1120px)}.site-nav{flex-direction:column;align-items:flex-start}.nav-links{justify-content:flex-start}.nav-links a{padding:.5rem .7rem}.surface{border-radius:1.35rem}.page-hero,.article-header,.article-body{padding:1.2rem}.prev-next{grid-template-columns:1fr}.action-card--next{text-align:left}.list-row{grid-template-columns:1fr;gap:.2rem}.site-footer{flex-direction:column}.site-footer div:last-child{justify-content:flex-start}}@media (hover:none),(pointer:coarse){body{background-attachment:scroll}}@media (orientation:portrait){body{background-image:url(/bg-portrait.webp)}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}