/* C 宣纸：暖色纸感。米黄纸色 + 暖白玻璃 + 朱砂红点缀，标题和正文用宋体。 */
:root{
  --font-ui:-apple-system,"PingFang SC","Noto Sans CJK SC",sans-serif;
  --font-title:"Songti SC","STSong","Noto Serif CJK SC",serif;
  --font-read:"Songti SC","STSong","Noto Serif CJK SC",serif;
  --r-card:16px; --blur:18px; --sat:140%;
  --bg:#F1E9DA; --blob1:rgba(245,205,160,.70); --blob2:rgba(235,190,180,.55); --blob3:rgba(215,225,190,.55);
  --glass:rgba(255,250,240,.82); --glass-lite:rgba(255,251,243,.60); --glass-solid:#FBF6EC;
  --glass-edge:rgba(255,255,250,.8); --glass-hi:rgba(255,255,255,.9); --glass-lo:rgba(120,90,50,.12);
  --sheen-a:.40; --shadow:rgba(110,80,40,.12);
  --text:#2B2118; --text-2:#5C4D3E; --line:rgba(90,60,30,.12); --track:rgba(90,60,30,.16);
  --accent:#A3361F; --accent-text:#93301B; --on-accent:#FFF8EE; --accent-edge:rgba(255,230,210,.4);
  --tab-on:rgba(163,54,31,.10);
  --adult-text:#8E1F2E; --adult-bg:rgba(250,225,220,.9); --adult-edge:rgba(142,31,46,.25);
  --scrim:rgba(50,35,20,.35); --sw-edge:rgba(90,60,30,.18);
  --fs:18px;
}
html[data-rbg="1"]{--read-bg:#F5EDDC;--read-text:#2E2619;--read-meta:#65594A}
html[data-rbg="2"]{--read-bg:#E2EAD7;--read-text:#212B1D;--read-meta:#4F5B48}
html[data-rbg="3"]{--read-bg:#FBF8F2;--read-text:#2A241C;--read-meta:#625A4E}
.sw[data-rbg="1"]{background:#F5EDDC;color:#2E2619}
.sw[data-rbg="2"]{background:#E2EAD7;color:#212B1D}
.sw[data-rbg="3"]{background:#FBF8F2;color:#2A241C}
.sw-night{background:#1A1612;color:#CDBFA8}
html[data-night="1"]{
  --bg:#17130F; --blob1:rgba(120,70,30,.35); --blob2:rgba(110,40,35,.30); --blob3:rgba(60,70,40,.30);
  --glass:rgba(38,32,25,.86); --glass-lite:rgba(48,40,32,.62); --glass-solid:#2A231C;
  --glass-edge:rgba(255,235,200,.13); --glass-hi:rgba(255,235,200,.16); --glass-lo:rgba(0,0,0,.3);
  --sheen-a:.06; --shadow:rgba(0,0,0,.4);
  --text:#EFE4D2; --text-2:#BCAE98; --line:rgba(255,235,200,.10); --track:rgba(255,235,200,.18);
  --accent:#D9765A; --accent-text:#EB9A80; --on-accent:#1E0E08; --accent-edge:rgba(255,220,200,.25);
  --tab-on:rgba(235,154,128,.10); --tab-on-text:#F8C9B8; --tab-text:#D6C9B4; --bar-sheen:.04;
  --adult-text:#FF9F9F; --adult-bg:rgba(120,30,30,.45); --adult-edge:rgba(255,159,159,.3);
  --scrim:rgba(0,0,0,.5); --sw-edge:rgba(255,235,200,.2);
  --read-bg:#1A1612; --read-text:#CDBFA8; --read-meta:#94887A;
}
/* 封面：低饱和的书封色 + 内衬细框，像精装书 */
:root{--cv-edge:rgba(255,240,220,.35)}
.c1{background:linear-gradient(160deg,#4A5577,#2C3450)}
.c2{background:linear-gradient(160deg,#8A3D30,#55231B)}
.c3{background:linear-gradient(160deg,#4F6F5E,#2C4436)}
.c4{background:linear-gradient(160deg,#8A6A38,#5A4320)}
.c5{background:linear-gradient(160deg,#6A4766,#3F2A3D)}
.c6{background:linear-gradient(160deg,#3D6470,#22404A)}
.cv::before{content:"";position:absolute;inset:5px;border:1px solid rgba(255,240,220,.35);border-radius:4px;pointer-events:none}
.rank .cv::before{inset:3px}