/* B 曜石：深色质感。黑曜石底 + 烟色水晶玻璃 + 香槟金点缀。外框始终深色，白天只是正文变浅。 */
:root{
  --font-ui:-apple-system,"PingFang SC","Noto Sans CJK SC",sans-serif;
  --font-title:var(--font-ui);
  --font-read:-apple-system,"PingFang SC","Noto Sans CJK SC",sans-serif;
  --r-card:18px; --blur:24px; --sat:150%;
  --bg:#0B0B0E; --blob1:rgba(30,90,85,.50); --blob2:rgba(110,30,55,.45); --blob3:rgba(150,115,50,.28);
  --glass:rgba(26,26,31,.86); --glass-lite:rgba(38,38,46,.60); --glass-solid:#1D1D23;
  --glass-edge:rgba(255,255,255,.13); --glass-hi:rgba(255,240,210,.22); --glass-lo:rgba(0,0,0,.35);
  --sheen-a:.07; --shadow:rgba(0,0,0,.45);
  --text:#F2EEE6; --text-2:#B9B3A8; --line:rgba(255,255,255,.09); --track:rgba(255,255,255,.16);
  --accent:#D9B76E; --accent-text:#E3C585; --on-accent:#1A1408; --accent-edge:rgba(255,240,200,.45);
  --tab-on:rgba(217,183,110,.16); --tab-on-text:#EED6A2; --tab-text:#D3CDC2; --bar-sheen:.04;
  --adult-text:#FF9AA8; --adult-bg:rgba(130,25,45,.45); --adult-edge:rgba(255,154,168,.3);
  --scrim:rgba(0,0,0,.55); --sw-edge:rgba(255,255,255,.2);
  --fs:18px;
}
html[data-rbg="1"]{--read-bg:#F4F2EE;--read-text:#1E1C19;--read-meta:#5F5A52}
html[data-rbg="2"]{--read-bg:#E1EBDF;--read-text:#1C281D;--read-meta:#4C5A4D}
html[data-rbg="3"]{--read-bg:#EDE3CF;--read-text:#2B241A;--read-meta:#5E5444}
.sw[data-rbg="1"]{background:#F4F2EE;color:#1E1C19}
.sw[data-rbg="2"]{background:#E1EBDF;color:#1C281D}
.sw[data-rbg="3"]{background:#EDE3CF;color:#2B241A}
.sw-night{background:#000000;color:#A8A39A}
html[data-night="1"]{
  --bg:#000000; --blob1:rgba(20,60,58,.40); --blob2:rgba(80,20,40,.35); --blob3:rgba(110,85,35,.20);
  --text-2:#ADA79C;
  --accent:#C9A862; --accent-text:#D6B878;
  --read-bg:#000000; --read-text:#A8A39A; --read-meta:#7D786F;
}
/* 阅读页的栏和面板压在浅色纸面上，玻璃加深，保证浅色字对比度 */
.reader{--glass-lite:rgba(24,24,29,.88)}
.reader .glass-lite .glass-lite{--glass-lite:rgba(60,60,70,.85)}
/* 封面：宝石色 + 香槟金细框 */
:root{--cv-edge:rgba(217,183,110,.45)}
.c1{background:linear-gradient(160deg,#1F3550,#0C1626)}
.c2{background:linear-gradient(160deg,#4A1A2A,#1E0910)}
.c3{background:linear-gradient(160deg,#173F3A,#081B18)}
.c4{background:linear-gradient(160deg,#4A3A1C,#1C150A)}
.c5{background:linear-gradient(160deg,#30204E,#120B22)}
.c6{background:linear-gradient(160deg,#1C3A4E,#0A1822)}
.cv b{color:#E9D3A0}
.sec-title h2,.nav h1{letter-spacing:1.5px}