.rbook{
--paper:#efe4ca;--paper-edge1:#ddcda9;--paper-edge2:#cbb98f;
--ink:#2a2015;--ink-dim:#45372a;--ink-mute:#6a5538;--rule:rgba(74,52,28,.28);
--seal:#a8342a;--seal-ink:#f7ead0;--mark:rgba(168,52,42,.16);
--burn:rgba(122,76,28,.30);--spine:rgba(90,56,22,.10);--spine-deep:rgba(60,34,10,.30);
--plate:#e4d4b2;--plate-grain:.55;--plate-vig:rgba(110,72,30,.38);--label-bg:rgba(246,238,220,.94);
--ow:#3a6537;--ne:#89401f;--en:#5d4294;--lamp:rgba(255,236,190,.22);
--desk-title:#2a2118;--desk-eyebrow:#8f6c35;--desk-glow:rgba(170,120,40,.12);--sheet-shadow:rgba(70,45,15,.38);
--grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .42 0 0 0 0 .3 0 0 0 0 .16 0 0 0 .5 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
--stain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='900' height='900'%3E%3Cfilter id='s'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.006' numOctaves='3' seed='7' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .45 0 0 0 0 .3 0 0 0 0 .12 0 0 0 .9 -.32'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23s)'/%3E%3C/svg%3E");
--sheet-stain:var(--stain);--sheet-grain:var(--grain);--sheet-glow:radial-gradient(ellipse at 18% 6%,rgba(255,250,235,.38),transparent 46%);
background:radial-gradient(1200px 520px at 50% 0,var(--lamp),transparent 70%);
transition:background .8s}
.rbook[data-mode=night]{
--paper:#1c1914;--paper-edge1:#2a251d;--paper-edge2:#14110d;
--ink:#eadfc4;--ink-dim:#c9b996;--ink-mute:#93856a;--rule:rgba(234,223,196,.15);
--seal:#b9422f;--seal-ink:#f5e5c4;--mark:rgba(214,178,106,.2);
--burn:rgba(0,0,0,.62);--spine:rgba(0,0,0,.22);--spine-deep:rgba(0,0,0,.55);
--plate:#0a0c12;--plate-grain:.12;--plate-vig:rgba(0,0,0,.66);--label-bg:rgba(12,13,18,.86);
--ow:#9bc5ab;--ne:#f0a060;--en:#c7a6ff;--lamp:rgba(255,168,80,.08);
--desk-title:#efe3c6;--desk-eyebrow:#b39a6a;--desk-glow:rgba(214,170,90,.18);--sheet-shadow:rgba(0,0,0,.75);
--sheet-stain:radial-gradient(ellipse at 50% 0%,rgba(255,180,90,.07),transparent 60%);
--sheet-grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .55 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
--sheet-glow:radial-gradient(ellipse at 18% 6%,rgba(255,200,130,.05),transparent 46%)}
.rhist__empty{color:var(--text-mute);font-size:15px;margin:0}

/* 书桌：页首 */
.rk-desk{padding:52px 0 40px}
.rk-desk__inner{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.rk-desk__text{min-width:0;max-width:720px}
.rk-desk__eyebrow{font-family:var(--font-display);font-size:12px;letter-spacing:.42em;text-transform:uppercase;color:var(--desk-eyebrow);margin-bottom:14px}
.rk-desk__title{font-family:var(--font-serif);font-weight:700;font-size:clamp(36px,5vw,60px);line-height:1.15;letter-spacing:.16em;color:var(--desk-title);margin:0 0 16px;text-shadow:0 2px 24px var(--desk-glow)}
.rk-desk__lead{font-family:var(--font-serif);font-size:15px;line-height:1.9;color:var(--text-dim);margin:0;max-width:60ch}
.rk-shelf{padding:8px 0 110px}

/* 昼夜开关 */
.rk-toggle{display:inline-flex;align-items:center;flex:none;gap:12px;background:transparent;border:1px solid var(--line);border-radius:999px;padding:5px 16px 5px 5px;color:var(--text);font:inherit;font-family:var(--font-serif);font-size:14px;letter-spacing:.3em;cursor:pointer;transition:border-color .3s,background-color .3s}
.rk-toggle:hover{border-color:var(--edge-line-strong);background:var(--panel)}
.rk-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.rk-toggle__track{position:relative;flex:none;width:56px;height:30px;border-radius:999px;overflow:hidden;background:linear-gradient(180deg,#f8dc9e,#e6a457);box-shadow:inset 0 1px 3px rgba(0,0,0,.35);transition:background .7s}
.rk-toggle__stars{position:absolute;inset:0;opacity:0;transition:opacity .7s;background-image:radial-gradient(1px 1px at 10px 8px,#fff 50%,transparent),radial-gradient(1px 1px at 19px 20px,#fff 50%,transparent),radial-gradient(1.4px 1.4px at 7px 19px,#fff 50%,transparent),radial-gradient(1px 1px at 25px 7px,#fff 50%,transparent),radial-gradient(1px 1px at 15px 13px,#fff 50%,transparent)}
.rk-toggle__orb{position:absolute;top:5px;left:5px;width:20px;height:20px;border-radius:50%;background:#fff7da;box-shadow:0 0 12px 3px rgba(255,212,110,.85);transition:transform .7s cubic-bezier(.65,-.35,.3,1.35),background-color .7s,box-shadow .7s}
.rk-toggle__orb::after{content:"";position:absolute;inset:0;border-radius:50%;background:#1a1f3c;opacity:0;transform:translate(14px,-10px) scale(.3);transition:transform .7s,opacity .5s}
html[data-theme=night] .rk-toggle__track{background:linear-gradient(180deg,#10162c,#272150)}
html[data-theme=night] .rk-toggle__stars{opacity:.9}
html[data-theme=night] .rk-toggle__orb{transform:translateX(26px);background:#ece5cc;box-shadow:0 0 10px 1px rgba(196,206,255,.45)}
html[data-theme=night] .rk-toggle__orb::after{opacity:1;transform:translate(6px,-4px) scale(.9)}
.rk-toggle--sm{padding:3px;gap:0;background:transparent;pointer-events:auto}
.rhs .rk-toggle--sm{border-color:var(--rule)}
.rk-toggle--sm .rk-toggle__track{width:46px;height:24px}
.rk-toggle--sm .rk-toggle__orb{width:16px;height:16px;top:4px;left:4px}
html[data-theme=night] .rk-toggle--sm .rk-toggle__orb{transform:translateX(22px)}

/* 书页 */
.rk-sheet{position:relative;color:var(--ink);background-color:var(--paper);background-image:var(--sheet-glow),radial-gradient(ellipse at 88% 94%,rgba(120,80,30,.1),transparent 55%),var(--sheet-stain),var(--sheet-grain);background-size:auto,auto,900px 900px,220px 220px;border-radius:3px 5px 5px 3px;padding:clamp(28px,5.2vw,72px) clamp(20px,4.6vw,64px) clamp(36px,5vw,72px);font-family:var(--font-serif);box-shadow:0 1px 0 var(--paper-edge1),0 2px 0 var(--paper-edge2),0 3px 0 var(--paper-edge1),0 4px 0 var(--paper-edge2),0 5px 0 var(--paper-edge1),0 6px 0 var(--paper-edge2),0 46px 90px -24px var(--sheet-shadow),0 0 0 1px rgba(0,0,0,.3);transition:background-color .8s,color .8s,box-shadow .8s}
.rk-sheet::before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;box-shadow:inset 0 0 140px var(--burn),inset 0 0 22px var(--burn);transition:box-shadow .8s}
.rk-sheet+.rk-sheet{margin-top:96px}

.rk-title{position:relative;text-align:center;max-width:780px;margin:0 auto clamp(40px,6vw,72px)}
.rk-title__vol{font-size:13px;letter-spacing:.6em;color:var(--seal);margin-bottom:18px}
.rk-title__h{font-weight:700;font-size:clamp(26px,3.8vw,44px);line-height:1.35;letter-spacing:.14em;margin:0 0 12px;color:var(--ink)}
.rk-title__range{font-size:13px;letter-spacing:.12em;color:var(--ink-mute)}
.rk-orn{display:flex;align-items:center;gap:16px;max-width:440px;margin:28px auto;color:var(--ink-mute);font-size:20px;line-height:1}
.rk-orn::before,.rk-orn::after{content:"";flex:1;height:5px;border-block:1px solid var(--rule)}
.rk-preface{text-align:left;max-width:620px;margin:0 auto}
.rk-preface__h{text-align:center;font-size:15px;font-weight:700;letter-spacing:1em;text-indent:1em;color:var(--ink);margin:0 0 12px}
.rk-preface p{font-size:15px;line-height:2.05;color:var(--ink-dim);text-indent:2em;text-align:justify;margin:0}
.rk-stats{display:flex;justify-content:center;flex-wrap:wrap;margin-top:34px;row-gap:16px}
.rk-stat{display:flex;flex-direction:column;align-items:center;gap:6px;padding:0 clamp(16px,3vw,32px)}
.rk-stat+.rk-stat{border-left:1px solid var(--rule)}
.rk-stat b{font-size:28px;font-weight:700;line-height:1;color:var(--ink);letter-spacing:.06em}
.rk-stat span{font-size:12px;letter-spacing:.2em;color:var(--ink-mute)}

/* 跨页：左文右图，中缝 */
.rk-spread{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(48px,7vw,112px);align-items:start}
.rk-spread::before{content:"";position:absolute;top:-36px;bottom:-40px;left:50%;width:110px;transform:translateX(-50%);pointer-events:none;background:linear-gradient(90deg,transparent,var(--spine) 38%,var(--spine-deep) 50%,var(--spine) 62%,transparent)}
.rk-text{min-width:0;order:1}
.rk-day{scroll-margin-top:24px}
.rk-doc .rk-day{scroll-margin-top:calc(var(--nav-h) + 24px)}
.rk-day+.rk-day{margin-top:68px}
.rk-day__head{position:relative;display:flex;align-items:center;gap:18px;padding-bottom:16px;margin-bottom:10px;border-bottom:1px solid var(--rule)}
.rk-day__head::after{content:"";position:absolute;left:0;right:0;bottom:-5px;border-bottom:1px solid var(--rule)}
.rk-seal{flex:none;display:grid;place-items:center;width:54px;height:54px;border-radius:5px;background:var(--seal);color:var(--seal-ink);font-size:28px;font-weight:700;line-height:1;transform:rotate(-6deg);box-shadow:inset 0 0 0 3px var(--seal),inset 0 0 0 4.5px var(--seal-ink);opacity:.9;-webkit-mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='90' height='90'%3E%3Cfilter id='m'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='2' seed='3'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -3 2.5'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23m)'/%3E%3C/svg%3E");mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='90' height='90'%3E%3Cfilter id='m'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='2' seed='3'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -3 2.5'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23m)'/%3E%3C/svg%3E");transition:background-color .8s}
.rk-day:nth-child(even) .rk-seal{transform:rotate(4deg)}
.rk-day__num{font-size:12px;letter-spacing:.4em;color:var(--seal)}
.rk-day__date{font-size:28px;font-weight:700;letter-spacing:.1em;line-height:1.25;margin:3px 0 2px;color:var(--ink)}
.rk-day__heading{font-size:14px;letter-spacing:.06em;color:var(--ink-dim)}

.rk-entry{position:relative;display:grid;grid-template-columns:62px minmax(0,1fr);gap:20px;padding:20px 0}
.rk-entry+.rk-entry{border-top:1px dashed var(--rule)}
.rk-entry.is-linked{cursor:pointer}
.rk-margin{position:relative;display:flex;flex-direction:column;align-items:flex-end;gap:8px;padding-top:4px}
.rk-margin::after{content:"";position:absolute;right:-11px;top:4px;bottom:0;width:2px;border-radius:2px;background:var(--seal);transform:scaleY(0);transform-origin:top;transition:transform .45s}
.rk-entry.is-current .rk-margin::after{transform:scaleY(1)}
.rk-margin__time{font-size:13px;letter-spacing:.04em;color:var(--ink-mute);font-variant-numeric:oldstyle-nums tabular-nums;white-space:nowrap}
.rk-margin__dim{writing-mode:vertical-rl;font-size:11px;letter-spacing:.3em;padding:6px 2px;border:1px solid currentColor;border-radius:2px;line-height:1}
.rk-dim--overworld{color:var(--ow)}.rk-dim--nether{color:var(--ne)}.rk-dim--end{color:var(--en)}
.rk-entry__title{font-size:18px;font-weight:700;line-height:1.6;letter-spacing:.03em;margin:0 0 8px;color:var(--ink)}
.rk-entry__title span{background-image:linear-gradient(transparent 58%,var(--mark) 58%,var(--mark) 92%,transparent 92%);background-repeat:no-repeat;background-size:0% 100%;transition:background-size .6s ease}
.rk-entry:hover .rk-entry__title span,.rk-entry.is-current .rk-entry__title span{background-size:100% 100%}
.rk-p{font-size:15px;line-height:2.05;color:var(--ink-dim);text-indent:2em;text-align:justify;margin:0}
.rk-p+.rk-p{margin-top:4px}
.rk-colophon{margin-top:76px;padding-top:26px;border-top:3px double var(--rule)}
.rk-colophon h4{font-size:15px;font-weight:700;letter-spacing:.4em;color:var(--ink);margin:0 0 12px}
.rk-colophon p{font-size:13px;line-height:1.95;color:var(--ink-mute);text-indent:2em;text-align:justify;margin:0}
.rk-colophon p+p{margin-top:6px}
.rk-finis{margin-top:40px;text-align:center;font-size:13px;letter-spacing:.6em;color:var(--ink-mute)}

/* 插图版 */
.rhs{order:2;position:sticky;top:20px;height:calc(100vh - var(--nav-h) - 40px);min-height:440px;margin:0;background:var(--plate);border:1px solid var(--ink-mute);border-radius:2px;overflow:hidden;isolation:isolate;box-shadow:0 0 0 6px var(--paper),0 0 0 7px var(--rule),0 18px 40px -18px rgba(40,24,8,.45);transition:background-color .8s,box-shadow .8s}
.rk-doc .rhs{top:calc(var(--nav-h) + 20px)}
.rhs.is-failed{display:none}
.rhs__canvas{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:grab;touch-action:pan-y}
.rhs__canvas:active{cursor:grabbing}
.rhs::before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background-image:var(--grain);background-size:220px;mix-blend-mode:multiply;opacity:var(--plate-grain);transition:opacity .8s}
.rhs::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(color-mix(in srgb,var(--plate) 88%,transparent),transparent 24%,transparent 80%,color-mix(in srgb,var(--plate) 85%,transparent)),radial-gradient(125% 95% at 50% 46%,transparent 52%,var(--plate-vig));transition:background .8s}
.rhs__labels{position:absolute;inset:0;z-index:2;pointer-events:none;overflow:hidden}
.rhs__label{position:absolute;left:0;top:0;opacity:0;transition:opacity .35s;font-family:var(--font-serif);font-size:12px;line-height:1;letter-spacing:.04em;padding:6px 9px;color:var(--ink);background:var(--label-bg);border:1px solid var(--rule);border-radius:2px;box-shadow:0 4px 14px -6px rgba(0,0,0,.4);white-space:nowrap;will-change:transform,opacity}
.rhs__label::after{content:"";position:absolute;left:50%;top:100%;width:1px;height:14px;background:linear-gradient(var(--ow),transparent)}
.rhs__label i{font-style:normal;font-size:11px;margin-right:6px;color:var(--ow)}
.rhs__label--nether i{color:var(--ne)}.rhs__label--nether::after{background:linear-gradient(var(--ne),transparent)}
.rhs__label--end i{color:var(--en)}.rhs__label--end::after{background:linear-gradient(var(--en),transparent)}
.rhs__label--dim{background:none;border:none;box-shadow:none;padding:0;color:var(--ink-mute);font-size:13px;letter-spacing:.6em}
.rhs__label--dim::after{display:none}
.rhs__hud{position:absolute;inset:0;z-index:3;pointer-events:none;display:flex;flex-direction:column;justify-content:space-between;padding:20px 22px 14px;font-family:var(--font-serif)}
.rhs__top{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}
.rhs__num{font-size:12px;letter-spacing:.3em;color:var(--seal)}
.rhs__date{font-size:28px;font-weight:700;letter-spacing:.1em;line-height:1.2;margin-top:6px;color:var(--ink)}
.rhs__heading{font-size:13px;letter-spacing:.06em;margin-top:6px;color:var(--ink-dim)}
.rhs__tools{pointer-events:auto}
.rhs__bar{display:grid;gap:6px;pointer-events:auto}
.rhs__seg{appearance:none;-webkit-appearance:none;background:none;border:0;padding:6px 0 0;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:6px;color:var(--ink-mute);font:inherit}
.rhs__track{align-self:stretch;display:block;height:2px;background:var(--rule);position:relative;overflow:hidden}
.rhs__fill{position:absolute;inset:0;background:var(--seal);transform-origin:left;transform:scaleX(var(--fill,0))}
.rhs__seglabel{font-size:12px}
.rhs__seg:hover .rhs__seglabel,.rhs__seg:focus-visible .rhs__seglabel{color:var(--ink)}
.rhs__caption{margin-top:10px;text-align:center;font-size:11px;letter-spacing:.14em;color:var(--ink-mute)}

@media (max-width:980px){
.rk-spread{grid-template-columns:minmax(0,1fr);gap:28px}
.rk-spread::before{display:none}
.rhs,.rk-doc .rhs{order:0;top:0;height:42vh;min-height:250px;max-height:420px;z-index:5;box-shadow:0 0 0 4px var(--paper),0 0 0 5px var(--rule),0 14px 24px -14px rgba(40,24,8,.55)}
.rk-doc .rhs{top:var(--nav-h)}
.rk-day{scroll-margin-top:calc(min(max(42vh,250px),420px) + 20px)}
.rk-doc .rk-day{scroll-margin-top:calc(var(--nav-h) + min(max(42vh,250px),420px) + 20px)}
.rhs__hud{padding:12px 14px 8px}
.rhs__date{font-size:20px}
.rhs__caption{display:none}
}
@media (max-width:640px){
.rk-desk{padding:36px 0 28px}
.rk-sheet{border-radius:3px}
.rk-entry{grid-template-columns:minmax(0,1fr);gap:8px}
.rk-margin{flex-direction:row;align-items:center;justify-content:flex-start;padding-top:0}
.rk-margin::after{right:auto;left:-10px;top:0;bottom:auto;height:100%;max-height:22px}
.rk-margin__dim{writing-mode:horizontal-tb;padding:2px 6px;letter-spacing:.12em}
.rk-day__date{font-size:23px}
.rk-seal{width:46px;height:46px;font-size:24px}
.rk-stat{padding:0 14px}
.rk-stat b{font-size:24px}
}
@media (prefers-reduced-motion:reduce){
.rbook *,.rbook *::before,.rbook *::after{transition:none!important}
}