:root{--r4-paper:#f5f4f2;--r4-paper-deep:#e9e8e5;--r4-tan:#d8d6d2;--r4-dusk-3:#8d8b87;--r4-dusk:#191918;--r4-ivory:#f0efed;--r4-gold:#8f8d89;--r4-ink:#232220;--r4-ink-soft:#5a5955;--r4-noir:#000;--r4-bg:var(--r4-paper);--r4-fg:var(--r4-ink);--r4-sans:"Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--r4-serif:"Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", "SimSun", serif;--r4-mono:"SF Mono", "JetBrains Mono", ui-monospace, "Courier New", monospace;--r4-fs-hero:clamp(26px, 4.6vw, 42px);--r4-fs-h2:clamp(20px, 2.6vw, 28px);--r4-fs-lead:clamp(16px, 1.9vw, 20px);--r4-fs-body:clamp(15px, 1.6vw, 17px);--r4-fs-small:13px;--r4-fs-mono:11px;--r4-track-mid:.2em;--r4-track-slight:.08em;--r4-sp-section:clamp(96px, 16vh, 180px);--r4-sp-block:clamp(40px, 6vh, 72px);--r4-maxw-text:640px;--r4-maxw-wide:1180px;--r4-ease:cubic-bezier(.22, .61, .36, 1);--r4-scrollbar-thumb:#6e6e6c66;--r4-glow-1:#ffffff8c;--r4-glow-2:#f0efed80;--r4-glow-3:#d2d1ce66;--r4-bar-bg:#0e0e0deb;--r4-bar-divider:#f0efed24;--r4-card-border:#58575442;--r4-rule:#23222024;--hl-off-white:#f0f1fa;--hl-white:#fff;--hl-black:#000;--hl-green:#c1ff00;--hl-blue:#1a2ffb;--hl-grey-blue:#2b2e3a;--hl-header:#0016ec;--hl-scroll-track:#0000001a;--hl-shadow:#0000000a;--hl-overlay:#0b0c0ef2;--hl-overlay-shadow:#00000059;--hl-overlay-close:#ffffff1f;--hl-card-bg:#1b1b1f;--hl-card-num:#ffffffc7;--hl-card-tag:#ffffff8f;--hl-nav-bg:#121416;--hl-nav-bar:#34393f}