:root{--paper:#eaeeee;--ink:#303233;--faint:#9fa4a4;--hair:#d6dada;--seal:#b5532e}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;line-height:1.7}
.page{display:none;min-height:100vh}
.page.on{display:block;animation:fadein .5s ease both}
@keyframes fadein{from{opacity:0}to{opacity:1}}
/* 封面 */
.cover{min-height:88vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px 24px 14vh;gap:24px}
.kicker{color:var(--faint);letter-spacing:.52em;font-size:10.5px}
.cover-img img{display:block;width:min(300px,60vw);height:auto;filter:saturate(.92)}
h1{font-family:"Noto Serif SC","Source Han Serif SC",Georgia,serif;font-size:clamp(24px,4vw,34px);font-weight:600;letter-spacing:.4em;margin-right:-.4em}
.sub{color:var(--faint);font-size:12px;letter-spacing:.3em}
.links{display:flex;flex-wrap:wrap;gap:8px 26px;justify-content:center;margin-top:10px}
.enter{color:var(--ink);text-decoration:none;font-size:13px;letter-spacing:.22em;border-bottom:1px solid var(--ink);padding-bottom:3px}
.enter:hover{color:var(--seal);border-color:var(--seal)}
.alt{color:var(--faint);text-decoration:none;font-size:11.5px;letter-spacing:.14em;border-bottom:1px dashed var(--hair);padding-bottom:2px}
.alt:hover{color:var(--ink)}
/* 顶导航（极细） */
.topnav{position:fixed;top:0;left:0;right:0;z-index:20;display:flex;justify-content:center;gap:32px;padding:12px 16px;background:rgba(234,238,238,.93);backdrop-filter:blur(8px);border-bottom:1px solid var(--hair);transition:transform .35s ease,opacity .35s ease}
.topnav a{color:var(--ink);opacity:.6;text-decoration:none;font-size:11.5px;letter-spacing:.26em}
.topnav a:hover{opacity:1;color:var(--seal)}
.topnav.hid{transform:translateY(-101%);opacity:0;pointer-events:none}
.topnav.show{transform:none;opacity:1;pointer-events:auto}
/* 翻阅主版面 */
#flip-body{padding:0 0 60px}
.sl{min-height:94vh;display:flex;align-items:center;padding:7vh 4vw 7vh 7vw;scroll-margin-top:20px}
.sl .gut{flex:0 0 17%;display:flex;flex-direction:column;justify-content:space-between;align-self:stretch;padding:6vh 0 4vh}
.sl .num{font-size:11px;color:var(--faint);letter-spacing:.24em}
.sl .cap{text-align:left}
.sl .cap .dt{font-size:11.5px;color:var(--ink);letter-spacing:.1em;margin-bottom:3px}
.sl .cap .dv{font-size:10.5px;color:var(--faint);letter-spacing:.08em}
.sl figure{flex:1;display:flex;justify-content:flex-start;align-items:center;min-width:0}
.sl img{max-width:100%;max-height:86vh;width:auto;height:auto;display:block;opacity:0;transform:translateY(14px);transition:opacity .8s ease,transform .8s ease;filter:saturate(.96)}
.sl.rv.on img{opacity:1;transform:none}
/* 章节隔页 */
.divider{min-height:52vh;display:flex;align-items:center;padding:0 7vw}
.divider .d-in{border-top:1px solid var(--hair);padding-top:16px;width:100%}
.divider .yr{font-family:"Noto Serif SC",serif;font-size:22px;letter-spacing:.2em}
.divider .mo{font-size:11px;color:var(--faint);letter-spacing:.34em;margin-top:4px}
/* 计数器 */
#counter{position:fixed;bottom:18px;right:24px;font-size:10.5px;color:var(--faint);letter-spacing:.2em;background:rgba(234,238,238,.8);padding:4px 10px;border-radius:99px;z-index:20}
/* 时间轴页（沿用装裱网格） */
.wrap{max-width:1120px;margin:0 auto;padding:70px 24px 90px}
section.month{margin-top:46px}
h2.date{font-family:"Noto Serif SC",serif;font-weight:600;display:flex;align-items:baseline;gap:14px;padding-bottom:8px;border-bottom:1px solid var(--ink)}
h2.date .yr{font-size:26px}
h2.date .md{font-size:14px;letter-spacing:.14em}
h2.date .wk{font-size:11px;color:var(--faint)}
h2.date .cnt{margin-left:auto;font-size:11.5px;color:var(--faint);font-weight:400}
.run{margin-top:24px}
.g-label{font-size:11.5px;color:var(--faint);letter-spacing:.14em;display:flex;align-items:center;gap:10px;margin-bottom:12px}
.g-label i{width:16px;height:1px;background:var(--seal)}
.g-label b{color:var(--ink);font-weight:600}
.jrow{display:flex;gap:12px;margin-bottom:12px}
.ph{overflow:hidden;background:#fff;padding:5px;border:1px solid var(--hair);transition:transform .3s,box-shadow .3s;cursor:default}
.ph:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(60,45,25,.16)}
.ph img{width:100%;height:100%;display:block}
.rv2{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s ease}
.rv2.on{opacity:1;transform:none}
/* 版权页 */
#about-body h2{font-family:"Noto Serif SC",serif;font-size:22px;letter-spacing:.34em;text-align:center;margin:10px 0 26px}
.bio{max-width:620px;margin:0 auto 30px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);padding:24px 8px;font-size:14px}
.bio p{margin-bottom:10px}.bio .note{color:var(--faint);font-size:11.5px}
.rollrow{display:flex;gap:16px;align-items:baseline;padding:11px 6px;border-bottom:1px solid var(--hair);font-size:13px;max-width:640px;margin:0 auto}
.rollrow b{font-weight:600;min-width:190px}
.rollrow span{color:var(--faint);font-size:11.5px}
footer{text-align:center;color:var(--faint);font-size:11px;letter-spacing:.24em;padding:24px;border-top:1px solid var(--hair)}
@media (max-width:760px){
 .sl{flex-direction:column-reverse;align-items:flex-start;padding:6vh 7vw}
 .sl .gut{flex:none;width:100%;flex-direction:row;justify-content:space-between;align-items:flex-end;padding:10px 0 0}
 .sl figure{width:100%;justify-content:flex-end}
 .sl img{max-height:70vh}
}
/* ---- 桌面端：左侧书脊式竖排导航（常驻） ---- */
@media (min-width:761px){
 .topnav{left:30px;right:auto;top:50%;transform:translateY(-50%);writing-mode:vertical-rl;padding:0;gap:28px;opacity:1!important;pointer-events:auto!important;background:none;border-bottom:none;backdrop-filter:none}
 .topnav.hid,.topnav.show{opacity:1!important;pointer-events:auto!important;transform:translateY(-50%)}
 .topnav a{opacity:.4;text-shadow:none;letter-spacing:.34em;padding:2px 0}
 .topnav a:hover{opacity:1;color:var(--seal)}
 .topnav:hover a{opacity:.75}
}

/* ---- 手机紧凑节奏 ---- */
@media (max-width:760px){
 .sl{min-height:0;padding:2.2vh 6vw 2.8vh}
 .sl .gut{padding:8px 0 0}
 .sl figure{margin-top:6px}
 .sl img{max-height:62vh}
 .divider{min-height:0;padding:5vh 7vw 4vh}
}

@media (max-width:760px){
 #flip-body{padding-top:46px}
}

/* ---- 系统深色模式 ---- */
@media (prefers-color-scheme: dark){
 :root{--paper:#1a1713;--ink:#e6ddcd;--faint:#93897a;--hair:#2e2a23;--seal:#c9714b}
 .ph{background:#211d18}
 .topnav{background:rgba(26,23,19,.93)}
}

/* ---- 时间轴灯箱 ---- */
#lb{position:fixed;inset:0;background:rgba(20,17,13,.96);display:none;align-items:center;justify-content:center;flex-direction:column;z-index:99}
#lb.on{display:flex;animation:lbin .25s ease}
@keyframes lbin{from{opacity:0}to{opacity:1}}
#lb img{max-width:92vw;max-height:78vh;box-shadow:0 24px 70px rgba(0,0,0,.55)}
#lb .cap{margin-top:14px;color:#e9e2d4;font-size:13px;letter-spacing:.06em}
#lb .cap span{color:#9a9083;margin:0 8px}
.nav{position:fixed;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;border:1px solid #4a443a;background:rgba(30,26,20,.6);color:#cfc5b2;font-size:19px;cursor:pointer;display:flex;align-items:center;justify-content:center;user-select:none}
.nav:hover{background:rgba(60,52,40,.8)}
#prev{left:18px}#next{right:18px}
#close{position:fixed;top:16px;right:22px;font-size:25px;color:#8b8070;cursor:pointer}#close:hover{color:#e9e2d4}
.hint{margin-top:6px;font-size:10.5px;color:#8b8070;opacity:.7;letter-spacing:.14em}

/* ---- 左侧竖栏（桌面）与底部署名 ---- */
#side{display:none}
#pagefoot{position:fixed;left:22px;bottom:18px;z-index:20;display:flex;align-items:center;gap:12px}
#pagefoot .sig{font-size:10.5px;color:var(--faint);letter-spacing:.14em}
#totop{cursor:pointer;font-size:15px;color:var(--faint);display:flex;align-items:center;transition:opacity .4s ease,color .2s;user-select:none;opacity:0;pointer-events:none}
#totop.on{opacity:1;pointer-events:auto}
#totop:hover{color:var(--seal);border-color:var(--seal)}
@media (min-width:761px){
 #side{display:block;position:fixed;left:22px;top:50%;transform:translateY(-50%);z-index:20;max-height:82vh;overflow-y:auto;scrollbar-width:none;padding-right:8px}
 #side::-webkit-scrollbar{display:none}
 #side a{display:block;color:var(--faint);font-size:11px;letter-spacing:.16em;line-height:2.05;text-decoration:none;text-align:left;transition:color .2s}
 #side a:hover{color:var(--seal)}
 #side a.cur{color:#0f0c0a;font-weight:600}
 #side .grp{margin-bottom:16px}
 #side .h{font-size:9px;letter-spacing:.32em;color:var(--faint);opacity:.7;margin-bottom:4px}
 #side .mo a{font-size:10px;line-height:1.95;opacity:.85}
 .topnav{display:none}
}
@media (max-width:760px){
 #pagefoot{left:16px;bottom:14px}
}

.scrollcue{width:1px;height:46px;background:var(--faint);opacity:.5;margin-top:36px;animation:cue 2.8s ease-in-out infinite;transform-origin:top}
@keyframes cue{0%,100%{transform:scaleY(.5);opacity:.2}50%{transform:scaleY(1);opacity:.65}}

@media (prefers-color-scheme: dark){
 #side a.cur{color:#f7efe1}
}

/* ---- 桌面：工具组分隔线 ---- */
@media (min-width:761px){
 #side .grp.tools{margin-top:10px;padding-top:12px;border-top:1px solid var(--hair)}
}

/* ---- 手机：右缘热条 + 日期抽屉 ---- */
#medge{display:none}
#mdrawer{position:fixed;top:0;right:0;bottom:0;width:148px;background:var(--paper);border-left:1px solid var(--hair);z-index:60;transform:translateX(102%);transition:transform .3s ease;overflow-y:auto;padding:64px 16px 30px;box-shadow:-6px 0 30px rgba(40,30,20,.1)}
#mdrawer.on{transform:none}
#mdrawer .dh{font-size:9px;letter-spacing:.32em;color:var(--faint);opacity:.7;margin-bottom:10px}
#mdrawer a{display:block;color:var(--faint);font-size:12px;letter-spacing:.14em;line-height:2.5;text-decoration:none}
#mdrawer a.cur{color:#0f0c0a;font-weight:600}
@media (max-width:760px){
}
@media (prefers-color-scheme: dark){
 #mdrawer{box-shadow:-6px 0 30px rgba(0,0,0,.4)}
 #mdrawer a.cur{color:#f7efe1}
}

/* ---- 手机：署名气泡 & 日历按钮 & 抽屉分组 ---- */
@media (max-width:760px){
 #pagefoot{background:rgba(234,238,238,.85);backdrop-filter:blur(4px);border-radius:99px;height:26px;padding:0 13px;gap:10px;bottom:16px;left:16px}
 #totop{font-size:14px}
 #counter{right:16px;bottom:16px;height:26px;line-height:26px;padding:0 12px;background:rgba(234,238,238,.85);backdrop-filter:blur(4px)}
 .calBtn{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--ink);opacity:.6;cursor:pointer;display:flex;align-items:center;padding:4px}
 .calBtn:active{opacity:1}
}
@media (prefers-color-scheme: dark){
 #pagefoot{background:rgba(26,23,19,.85)}
 #counter{background:rgba(26,23,19,.85)}
}
#mdrawer .dy{font-size:9px;letter-spacing:.3em;color:var(--faint);opacity:.65;margin:16px 0 4px}
#mdrawer .dy:first-child{margin-top:0}
#mdrawer a.cur{color:#0f0c0a;font-weight:600;background:rgba(60,45,25,.08);border-radius:7px;padding:0 9px;margin:0 -9px}
@media (prefers-color-scheme: dark){
 #mdrawer a.cur{color:#f7efe1;background:rgba(245,240,231,.1)}
}

.subwrap{display:flex;flex-direction:column;align-items:center;gap:8px;margin-top:14px}
.subwrap .sub{margin:0;font-family:"Noto Serif SC","Source Han Serif SC",Georgia,serif;font-size:15px;font-weight:600;letter-spacing:.34em;opacity:1;color:var(--ink)}
.sub2{color:var(--faint);font-size:11px;letter-spacing:.24em}

/* 字距尾补偿：让字形真正居中 */
.cover .kicker{margin-right:-.52em}
.subwrap .sub{margin-right:-.34em}
.sub2{margin-right:-.24em}

/* topnav 字距补偿：三个链接真正居中 */
.topnav a{margin-right:-.26em}

/* 顶栏中项居中：等宽盒子让「时间轴」正落屏中线 */
.topnav a{min-width:3.6em;text-align:center}

/* 顶栏对称补偿：左垫=右尾，字形盒内真居中，「间」字压线 */
.topnav a{margin-right:0;padding-left:.26em}

/* 顶栏终极居中：中项坐标级钉在中线，废弃此前的补偿叠层 */
@media (max-width:760px){
 .topnav a{min-width:0;margin:0;padding-left:.26em}
 .topnav a:nth-child(2){position:absolute;left:50%;transform:translateX(-50%)}
}

/* 顶栏 grid 三轨：1fr auto 1fr —— 中轨坐标级居中，两侧对称外让 */
@media (max-width:760px){
 .topnav{display:grid;grid-template-columns:1fr auto 1fr}
 .topnav a:first-child{justify-self:end}
 .topnav a:last-of-type{justify-self:start}
 .topnav a:nth-child(2){position:static;left:auto;transform:none}
}

/* ---- 手机 kicker 与灯箱修正 ---- */
@media (max-width:760px){
 .kicker{letter-spacing:.3em;line-height:1.9}
 .kicker .kdot{display:none}
 .kicker .yr{display:block;margin-top:3px}
 #lb .nav{top:auto;bottom:64px;transform:none;width:42px;height:42px}
 #lb .hint{display:none}
 #lb img{max-height:68vh}
}

/* ---- 灯箱按钮精修：电脑幽灵化，手机移除 ---- */
.nav{border:none;background:none;box-shadow:none;color:var(--faint);font-size:30px;font-weight:300;opacity:.45;transition:opacity .25s,color .25s}
.nav:hover{opacity:1;color:var(--seal);background:none}
@media (max-width:760px){
 #lb .nav{display:none!important}
}



/* ---- 灯箱零动画 ---- */
#lb.on{animation:none}
#lb.d-next img,#lb.d-prev img,#lb.d-fade img{animation:none}

/* ---- 灯箱手势主权与滑动提示 ---- */
#lb{touch-action:pan-y}
#swipehint{position:fixed;bottom:86px;left:50%;transform:translateX(-50%);color:#cfc5b2;font-size:12px;letter-spacing:.24em;opacity:0;transition:opacity .5s;pointer-events:none;z-index:100}
#swipehint.on{opacity:.85}

/* ---- 封面顶栏避让：按最坏情况（双工具栏）设计，全浏览器统一 ---- */
@media (max-width:760px){
 .cover{padding-top:88px}
}