:root{color-scheme:light;--bg:#f8f8f8;--surface:#ffffff;--ink:#1d1d1f;--muted:#6b6f76;--line:#e5e7eb;--line-strong:#d1d5db;--accent:#2f6feb;--accent-soft:#eef4ff;--code-bg:#f5f5f3;--tag-bg:#f0f1f2;--tag-ink:#687078;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans SC", "Source Han Sans SC", Arial, sans-serif;--font-display:"Iowan Old Style", Georgia, "Times New Roman", "Songti SC", STSong, "Noto Serif CJK SC", "Noto Serif SC", "Source Han Serif SC", serif;--font-reading:"Times New Roman", Times, "Songti SC", STSong, "Noto Serif CJK SC", "Noto Serif SC", "Source Han Serif SC", SimSun, "SimSun-ExtB", "MingLiU", serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;--space-1:8px;--space-2:16px;--space-3:24px;--space-4:32px;--space-5:40px;--space-7:56px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-sans);line-height:1.7}a{color:inherit;text-decoration:none}.container{width:min(1040px,calc(100% - 40px));margin:0 auto}.narrow{width:min(760px,calc(100% - 40px))}.site-header{position:sticky;top:0;z-index:10;background:rgba(248,248,248,.86);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.nav,.footer-inner{display:flex;align-items:center;gap:24px}.nav{justify-content:space-between;min-height:72px}.footer-inner{justify-content:flex-end;text-align:right}.footer-inner p{margin:0}.brand{display:inline-flex;align-items:center;color:var(--ink);font-family:var(--font-display);font-size:clamp(1.18rem,1.7vw,1.45rem);font-weight:500;line-height:1;white-space:nowrap}.brand-lockup{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-1)14px}.nav-tools{width:min(260px,34vw)}nav{display:flex;align-items:center;gap:18px;color:var(--muted);font-size:.95rem}nav a:hover,.text-link:hover,.back-link:hover,.article-body a:hover{color:var(--accent)}.home-hero{font-family:var(--font-sans);padding:clamp(64px,10vw,104px)0 var(--space-5)}.home-page{display:flex;min-height:100svh;flex-direction:column}.home-page #main{display:grid;flex:1}.home-page .home-hero{display:grid;min-height:100%;align-items:center;padding:var(--space-7)0}.kicker{max-width:500px;margin:0 0 var(--space-3);color:#757a82;font-size:clamp(.76rem,.95vw,.82rem);font-weight:460;letter-spacing:0;line-height:1.45}h1,h2,h3{margin:0;line-height:1.18;letter-spacing:0}h1{font-size:clamp(3.5rem,13vw,6.8rem);font-weight:700}.home-hero h1{max-width:600px;font-family:var(--font-display);font-size:clamp(2rem,4.3vw,3rem);font-style:normal;font-weight:500;line-height:1.14}h2{font-size:1.5rem;font-weight:700}h3{font-size:1.12rem;font-weight:650}.hero-copy{display:grid;gap:var(--space-1);max-width:640px;margin:var(--space-3)0 0;color:#6d7279;font-size:clamp(.95rem,1.1vw,1.02rem);font-weight:400;line-height:1.7}.hero-copy p{margin:0}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:var(--space-3)}.button{display:inline-flex;min-height:38px;align-items:center;justify-content:center;padding:0 14px;border:1px solid var(--ink);border-radius:8px;background:var(--ink);color:#fff;font-size:.92rem;font-weight:650}.button:hover{background:#000}.home-hero .button{min-height:auto;padding:0 0 2px;border:0;border-radius:0;background:0 0;color:#25272b;font-size:.96rem;font-weight:560;line-height:1.45;text-decoration:none;box-shadow:inset 0 -1px #9ca0a6}.home-hero .button::after{content:"→";margin-left:4px}.home-hero .button:hover{background:0 0;color:var(--accent);box-shadow:inset 0 -1px currentColor}.button-ghost{border-color:var(--line-strong);background:var(--surface);color:var(--ink)}.button-ghost:hover{border-color:var(--ink);background:var(--surface)}.section{padding:48px 0 82px}.section-head,.page-head .container{margin-bottom:20px}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:18px}.text-link,.back-link{color:var(--muted);font-size:.94rem;font-weight:600}.page-head{padding:70px 0 24px}.page-head h1{max-width:780px;font-size:clamp(2.6rem,8vw,4.5rem)}.archive-head{padding:var(--space-7)0 var(--space-4)}.archive-head h1{font-family:var(--font-display);font-size:clamp(2rem,4.2vw,3rem);font-weight:500;line-height:1.14}.lead{max-width:680px;margin-top:16px;color:var(--muted)}.post-list{display:grid;border-top:1px solid var(--line)}.post-card{border-bottom:1px solid var(--line)}.post-card a{display:grid;gap:8px;padding:20px 0}.archive-section{padding:0 0 82px}.search-field{position:relative;display:block}.search-field::before{position:absolute;top:50%;left:15px;width:10px;height:10px;border:1.5px solid #8b9198;border-radius:999px;content:"";transform:translateY(-58%)}.search-field::after{position:absolute;top:50%;left:25px;width:7px;height:1.5px;background:#8b9198;content:"";transform:translateY(4px)rotate(45deg);transform-origin:left center}.search-field input{width:100%;min-height:44px;padding:0 16px 0 42px;border:1px solid var(--line);border-radius:8px;background:rgba(255,255,255,.42);color:var(--ink);font:inherit;font-size:.95rem;outline:none}.header-search input{min-height:38px;border-color:transparent;background:rgba(255,255,255,.34);font-size:.9rem}.search-field input::placeholder{color:#8a9097}.search-field input:focus{border-color:#b9bec5;background:rgba(255,255,255,.72)}.screen-reader-text{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.archive-list{border-top-color:var(--line-strong)}.archive-card a{grid-template-columns:104px minmax(0,1fr);gap:var(--space-3);padding:var(--space-3)0}.archive-card h2{font-family:var(--font-display);font-size:clamp(1.28rem,2.2vw,1.62rem);font-weight:500;line-height:1.24}.post-entry{display:grid;gap:var(--space-1)}.post-card a:hover h2,.post-card a:hover h3{color:var(--accent)}.post-row{display:grid;grid-template-columns:minmax(0,1fr)auto;gap:18px;align-items:baseline}.post-card time,.article-meta{color:var(--muted);font-size:.9rem;white-space:nowrap}.archive-card time{padding-top:.18em;color:#7b8188;font-size:.82rem;font-variant-numeric:lining-nums tabular-nums;letter-spacing:0}.post-card p{max-width:650px;margin:0;color:var(--muted)}.empty-note{margin:0;padding:20px 0;color:var(--muted)}.search-empty{border-bottom:1px solid var(--line)}.article{padding:62px 0 104px}.article-head{display:grid;gap:14px}.article-head h1{max-width:760px;font-family:var(--font-display);font-size:clamp(2rem,4.2vw,3rem);font-weight:500;line-height:1.14;text-wrap:balance}.article-meta{display:flex;flex-wrap:wrap;gap:10px;color:#747b83;font-family:var(--font-sans);font-size:.9rem;font-variant-numeric:lining-nums tabular-nums;font-weight:400;line-height:1.4}.article-body{max-width:720px;margin-top:48px;color:#17191c;font-family:var(--font-reading);font-size:clamp(1.07rem,1.4vw,1.14rem);font-weight:400;line-height:1.95;letter-spacing:0;overflow-wrap:break-word}.article-body>*:first-child{margin-top:0}.article-body h2,.article-body h3,.article-body h4,.article-body h5,.article-body h6{color:var(--ink);font-family:var(--font-sans);font-weight:680;line-height:1.32;scroll-margin-top:92px;text-wrap:balance}.article-body h2{margin:2.5em 0 .85em;padding-top:.85em;border-top:1px solid var(--line);font-size:clamp(1.55rem,3vw,2rem)}.article-body h3{margin:2.15em 0 .75em;font-size:clamp(1.28rem,2.2vw,1.48rem)}.article-body h4,.article-body h5,.article-body h6{margin:1.85em 0 .65em;font-size:1.04rem}.article-body p{margin:0 0 1.35em;text-align:justify;text-justify:inter-word}.article-body .cjk-text{color:#0d0f12;font-weight:500}.article-body p+p{margin-top:-.25em}.article-body ul,.article-body ol{margin:0 0 1.45em;padding-left:1.45em}.article-body li{margin:.38em 0;padding-left:.15em;text-align:justify;text-justify:inter-word}.article-body li::marker{color:var(--muted)}.article-body li>ul,.article-body li>ol{margin-top:.35em;margin-bottom:.45em}.article-body a{color:var(--accent);text-decoration:underline;text-decoration-thickness:.08em;text-underline-offset:.18em}.article-body strong{color:var(--ink);font-weight:700}.article-body em{font-style:italic;text-emphasis:none}.article-body code{padding:.13em .35em;border:1px solid #e4e2dc;border-radius:5px;background:var(--code-bg);color:#1f2933;font-family:var(--font-mono);font-size:.86em}.article-body blockquote{margin:1.8em 0 1.9em;padding:.1em 0 .1em 1.15em;border-left:1px solid var(--line-strong);color:#545b64;font-size:.98em;line-height:1.86}.article-body blockquote p{margin-bottom:.7em}.article-body blockquote p:last-child{margin-bottom:0}.article-body .editor-note{margin:2em 0 2.1em;padding:1.05em 1.15em 1.1em;border:1px solid var(--line);border-radius:8px;background:#f5f5f3;color:#4d545c;font-family:var(--font-sans);font-size:.9em;line-height:1.62}.article-body .editor-note-title{margin:0 0 .65em;color:var(--ink);font-size:.92rem;font-weight:700}.article-body .editor-note-body>*:last-child{margin-bottom:0}.article-body .editor-note p{margin-bottom:.58em;text-align:left}.article-body .editor-note strong{color:#2f343a;font-weight:650}.article-body pre{overflow-x:auto;margin:1.8em 0;padding:18px 20px;border:1px solid var(--line);border-radius:8px;background:#fbfbfa;box-shadow:inset 0 1px rgba(255,255,255,.75);line-height:1.65}.article-body pre code{padding:0;border:0;background:0 0;font-size:.88rem}.article-body hr{width:72px;height:1px;margin:3em auto;border:0;background:var(--line-strong)}.article-body img{display:block;max-width:100%;height:auto;margin:2em auto;border-radius:8px}.article-body figure{margin:2.2em 0}.article-body figure img{margin:0 auto}.article-body figcaption{margin-top:.7em;color:var(--muted);font-family:var(--font-sans);font-size:.9rem;line-height:1.55;text-align:center}.article-body table{display:block;width:100%;margin:1.8em 0;overflow-x:auto;border-collapse:collapse;font-family:var(--font-sans);font-size:.95rem;line-height:1.55}.article-body th,.article-body td{padding:.72em .85em;border:1px solid var(--line);text-align:left;vertical-align:top}.article-body th{background:#f4f6f8;color:var(--ink);font-weight:650}.article-body tr:nth-child(even) td{background:#fbfbfb}.article-footer{max-width:720px;margin-top:52px}.comments{max-width:720px;margin-top:56px;padding-top:34px;border-top:1px solid var(--line);font-family:var(--font-sans)}.comments h2{margin-bottom:18px;font-family:var(--font-display);font-size:1.42rem;font-weight:500}#cusdis_thread{min-height:720px}#cusdis_thread iframe{width:100%!important;height:720px;border:0}.article-tags{display:flex;flex-wrap:wrap;gap:10px}.article-tags a{display:inline-flex;min-height:28px;align-items:center;padding:0 11px;border:1px solid transparent;border-radius:999px;background:var(--tag-bg);color:var(--tag-ink);font-size:.86rem;font-weight:500;line-height:1}.article-tags a:hover{border-color:var(--line-strong);background:#f5f7f8;color:var(--ink)}.site-footer{border-top:1px solid var(--line);padding:16px 0;color:var(--muted);font-size:.86rem;line-height:1.35}@media(max-width:640px){.container,.narrow{width:min(100% - 28px,1040px)}.section-head{align-items:flex-start;flex-direction:column;gap:10px}.nav{gap:12px;min-height:62px}.brand-lockup{gap:4px 10px}.brand{font-size:clamp(1.1rem,5vw,1.24rem)}.nav-tools{flex:0 1 clamp(96px,34vw,128px);width:clamp(96px,34vw,128px)}.header-search input{min-height:34px;padding-right:10px;padding-left:32px;border-color:var(--line);background:rgba(255,255,255,.24);font-size:.82rem}.header-search::before{left:12px;width:8px;height:8px}.header-search::after{left:20px;width:6px}nav{gap:14px}h1{font-size:clamp(3rem,15vw,4rem)}.home-hero h1{max-width:12ch;font-size:clamp(2rem,9vw,2.55rem);line-height:1.16}.home-hero{padding:var(--space-7)0 var(--space-4)}.kicker{max-width:18rem;margin-bottom:var(--space-3);font-size:.76rem;line-height:1.5}.hero-copy{max-width:21rem;margin-top:var(--space-3);font-size:.96rem;line-height:1.66}.hero-actions{margin-top:var(--space-3)}.home-hero .button{font-size:.94rem}.post-row{grid-template-columns:1fr;gap:6px}.archive-head{padding:var(--space-5)0 var(--space-3)}.archive-section{padding-bottom:var(--space-7)}.archive-card a{grid-template-columns:1fr;gap:6px;padding:var(--space-3)0}.archive-card h2{font-size:clamp(1.24rem,7vw,1.55rem)}.archive-card time{padding-top:0}.article{padding-top:46px}.article-body{margin-top:38px;color:#111315;font-size:1.03rem;font-weight:400;line-height:1.88}.article-body .cjk-text{color:#050607;font-weight:560;text-shadow:.012em 0 0 currentColor}.article-footer{margin-top:42px}.comments{margin-top:46px;padding-top:28px}.article-body h2{margin-top:2.25em}.article-body blockquote{margin:1.55em 0 1.65em;padding-left:.95em}.article-body .editor-note{margin:1.75em 0 1.85em;padding:.95em 1em 1em}.article-body pre{margin-right:-4px;margin-left:-4px;padding:15px}}