:root { color-scheme: light; --paper: #f7f5ef; --ink: #202723; --muted: #55605a; --line: #d5d8d0; --accent: #295443; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif; line-height: 1.8; }
a { color: var(--accent); text-underline-offset: .25em; }
a:hover { color: #172f25; }
a:focus-visible { outline: 3px solid #aa6e1c; outline-offset: 5px; }
.skip-link { position: absolute; left: 1rem; top: -6rem; padding: .6rem; background: white; z-index: 20; }
.skip-link:focus { top: 1rem; }
header { max-width: 1240px; margin: auto; padding: 1.3rem 2rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; border-bottom: 1px solid var(--line); }
header nav { display: flex; gap: 1.5rem; flex-wrap: wrap; font-size: .9rem; }
.brand { font-weight: 750; letter-spacing: .14em; text-decoration: none; color: var(--ink); }
.index, .reading { max-width: 1240px; padding: 4rem 2rem; margin: auto; }
.index > h1 { font-size: clamp(2.2rem, 5vw, 4rem); line-height: 1.25; margin: 1rem 0; letter-spacing: -.03em; font-weight: 650; }
.eyebrow { color: var(--accent); font-size: .75rem; letter-spacing: .14em; font-weight: 700; }
.subtitle { font-size: 1.35rem; color: var(--muted); margin: .5rem 0 1.5rem; }
.intro { max-width: 850px; font-size: 1.05rem; }
.date { color: var(--muted); font-size: .9rem; margin-top: 2rem; }
.paper-cards { margin-top: 3rem; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2.5rem; }
.paper-cards article { border-top: 3px solid var(--accent); padding-top: 1rem; }
.paper-cards h2 { font-size: 1.65rem; line-height: 1.5; margin: .4rem 0; }
.paper-cards p { max-width: 550px; }
[lang="en"] { color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: .7rem 1.4rem; margin: 1.8rem 0; font-size: .92rem; }
.actions a { padding: .25rem 0; font-weight: 650; }
.status { color: var(--muted); max-width: 920px; border-top: 1px solid var(--line); padding-top: 2rem; margin-top: 4rem; }
.paper-title { margin-bottom: 3rem; }
.paper-title h1 { font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.4; margin: .7rem 0; }
.title-group { display: inline-block; }
.paper-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 4rem; }
aside nav { position: sticky; top: 1rem; }
aside h2 { font-size: 1rem; margin-top: 0; }
aside ol { list-style: none; margin: 0; padding: 0; }
aside li { margin-bottom: .65rem; font-size: .88rem; line-height: 1.5; }
aside a { text-decoration: none; }
article h2 { font-size: 1.7rem; line-height: 1.5; margin: 3rem 0 .3rem; color: #111; }
article h3 { font-size: 1.1rem; margin: 0 0 1.5rem; font-weight: 550; }
article p { margin: 0 0 1rem; overflow-wrap: anywhere; }
article p[lang="en"] { margin-bottom: 1.8rem; font-size: .96rem; }
footer { max-width: 1240px; margin: 0 auto; padding: 2rem; border-top: 1px solid var(--line); display: flex; gap: 1rem 2rem; justify-content: space-between; flex-wrap: wrap; color: var(--muted); font-size: .8rem; }
@media (max-width: 800px) { .paper-layout { grid-template-columns: 1fr; gap: 2rem; } aside nav { position: static; border-bottom: 1px solid var(--line); padding-bottom: 1.5rem; } .paper-cards { grid-template-columns: 1fr; } .index, .reading { padding: 2.5rem 1.25rem; } header, footer { padding: 1.25rem; } .brand { font-size: .8rem; } header nav { gap: .8rem; font-size: .8rem; } }
@media print { header, footer, aside, .actions, .skip-link { display: none; } body { background: white; } .reading { padding: 0; } .paper-layout { display: block; } article h2, article h3 { break-after: avoid; } article p { orphans: 3; widows: 3; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }