/* 笔趣阁 biqugey.cn - 古风书阁版
   四色：朱红 #c8161d × 墨 #1a1a1a × 金 #d4a017 × 宣纸 #f5efe0 */
:root{
  --red:#c8161d;
  --red-d:#a01015;
  --gold:#d4a017;
  --gold-l:#e8c34a;
  --gold-d:#9c7a10;
  --ink:#1a1a1a;
  --paper:#f5efe0;
  --paper-d:#ebe3d0;
  --tx:#5a5042;
  --line:rgba(26,26,26,.14);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.7;-webkit-font-smoothing:antialiased;}
img{display:block;max-width:100%;}
a{color:inherit;}
[id]{scroll-margin-top:84px;}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

.btn{display:inline-flex;align-items:center;justify-content:center;font-weight:700;border-radius:4px;text-decoration:none;transition:.2s;border:none;cursor:pointer;font-size:15px;letter-spacing:1px;}
.btn-pri{background:var(--red);color:#fff;padding:12px 26px;border-bottom:3px solid var(--red-d);}
.btn-pri:hover{background:var(--red-d);}
.btn-line{background:transparent;color:var(--ink);padding:12px 26px;border:2px solid var(--ink);}
.btn-line:hover{background:var(--ink);color:#fff;}
.btn-lg{font-size:16.5px;padding:15px 34px;}
.hd-cta{padding:9px 20px;font-size:14px;}

.hd{position:sticky;top:0;z-index:60;background:rgba(245,239,224,.96);backdrop-filter:blur(8px);border-bottom:2px solid var(--red);}
.hd-in{display:flex;align-items:center;gap:26px;height:66px;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;}
.brand img{width:40px;height:40px;border-radius:50%;border:2px solid var(--gold);}
.brand-t{display:flex;flex-direction:column;line-height:1.25;}
.brand-t strong{font-size:18px;letter-spacing:1px;color:var(--red);}
.brand-t small{font-size:11px;color:var(--gold-d);letter-spacing:1px;}
.nav{display:flex;align-items:center;gap:22px;margin-left:auto;}
.nav a{text-decoration:none;font-size:14px;color:var(--tx);padding:6px 2px;border-bottom:2px solid transparent;transition:.2s;white-space:nowrap;}
.nav a:hover{color:var(--red);}
.nav a.on{color:var(--red);font-weight:700;border-bottom-color:var(--gold);}
.hd-r{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav + .hd-r{margin-left:0;}
.burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;background:var(--ink);border:none;border-radius:4px;cursor:pointer;padding:0 10px;}
.burger span{display:block;height:2px;background:#fff;border-radius:2px;transition:.25s;}
.burger.on span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.on span:nth-child(2){opacity:0;}
.burger.on span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 英雄区：古书展开 */
.hero{padding:66px 0 88px;background:var(--paper);background-image:repeating-linear-gradient(90deg,rgba(200,22,29,.03) 0 1px,transparent 1px 30px);}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;}
.kick{display:inline-flex;align-items:center;gap:9px;font-size:13px;letter-spacing:2.5px;color:var(--red);font-weight:700;margin:0 0 16px;}
.kick i{font-style:normal;background:var(--red);color:var(--gold-l);min-width:22px;height:22px;display:inline-flex;align-items:center;justify-content:center;border-radius:3px;font-size:12.5px;padding:0 5px;}
.hero-l h1{margin:0 0 18px;font-size:56px;line-height:1.1;letter-spacing:3px;color:var(--ink);}
.hero-l h1::after{content:"";display:block;width:80px;height:5px;margin-top:16px;background:linear-gradient(90deg,var(--red) 0 55%,var(--gold) 55% 100%);}
.lead{margin:0 0 26px;font-size:15.5px;color:var(--tx);line-height:1.9;text-align:justify;}
.hero-acts{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:22px;}
.hero-points{list-style:none;display:flex;gap:10px;flex-wrap:wrap;margin:0;padding:0;}
.hero-points li{font-size:13px;color:var(--red);background:#fff;border:1px solid rgba(200,22,29,.3);border-radius:2px;padding:5px 14px;}

.book-open{position:relative;width:min(440px,100%);margin:0 auto;height:460px;}
.bo-spine{position:absolute;top:30px;bottom:30px;left:50%;width:6px;margin-left:-3px;background:linear-gradient(180deg,var(--gold-d),var(--gold),var(--gold-d));z-index:5;border-radius:2px;}
.bo-seal{position:absolute;z-index:10;top:50%;left:50%;transform:translate(-50%,-50%);width:72px;height:72px;border-radius:50%;background:var(--red);display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;box-shadow:0 4px 12px rgba(200,22,29,.4);border:3px solid #fff;}
.bo-seal img{width:30px;height:30px;border-radius:50%;object-fit:cover;}
.bo-seal i{font-style:normal;font-size:11px;font-weight:700;letter-spacing:1px;}
.bo-page{margin:0;position:absolute;width:48%;height:400px;background:#fff;border:1px solid var(--line);border-radius:4px;overflow:hidden;box-shadow:0 12px 28px rgba(26,26,26,.22);}
.bo-page img{width:100%;height:auto;display:block;}
.bo-l{left:0;top:0;transform:perspective(800px) rotateY(-6deg);transform-origin:right center;}
.bo-r{right:0;top:0;transform:perspective(800px) rotateY(6deg);transform-origin:left center;}
.bo-tab{position:absolute;top:0;left:50%;transform:translateX(-50%);background:var(--red);color:#fff;font-size:11px;padding:3px 18px;border-radius:0 0 4px 4px;letter-spacing:2px;z-index:3;}
.bo-r .bo-tab{background:var(--gold);color:var(--ink);}

/* 分类导航带 */
.cate-scroll{padding:60px 0 50px;background:#fff;}
.cate-row{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;max-width:900px;margin:0 auto;}
.cat{display:inline-flex;align-items:center;justify-content:center;min-width:78px;padding:10px 22px;background:var(--paper);border:1.5px solid var(--line);border-radius:4px;font-size:15px;color:var(--ink);font-weight:600;letter-spacing:2px;transition:.2s;cursor:pointer;}
.cat:nth-child(3n+1){border-color:var(--red);color:var(--red);}
.cat:nth-child(3n+2){border-color:var(--gold);color:var(--gold-d);}
.cat:hover{background:var(--ink);color:#fff;border-color:var(--ink);transform:translateY(-2px);}

/* 通用区块 */
.sec{padding:80px 0;background:#fff;}
.sec-ink{background:var(--ink);color:#f0e8d6;}
.sec-paper{background:var(--paper);}
.sec-h{max-width:720px;margin:0 auto 46px;text-align:center;}
.sec-h .kick{justify-content:center;}
.sec-h-light .kick{color:var(--gold-l);}
.sec-h-light .kick i{background:var(--gold-l);color:var(--ink);}
.sec-h h2{margin:0 0 12px;font-size:29px;letter-spacing:1px;line-height:1.35;}
.sec-h-light h2{color:#f0e8d6;}
.sec-h h2::after{content:"";display:block;width:56px;height:4px;margin:14px auto 0;background:linear-gradient(90deg,var(--red),var(--gold));}
.sec-h-light h2::after{background:var(--gold-l);}
.sec-sub{margin:0;font-size:14.5px;color:var(--tx);}
.sec-h-light .sec-sub{color:#b8ad94;}

/* 热门榜单 */
.ranks{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.rk{background:rgba(255,255,255,.06);border:1px solid rgba(212,160,23,.3);border-radius:6px;padding:24px 20px 18px;position:relative;}
.rk::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gold);border-radius:6px 6px 0 0;}
.rk-alt::before{background:var(--red);}
.rk-h{display:flex;align-items:center;gap:12px;margin-bottom:16px;padding-bottom:14px;border-bottom:1px dashed rgba(212,160,23,.3);}
.rk-no{background:var(--red);color:#fff;font-size:11px;font-weight:700;padding:3px 10px;border-radius:2px;letter-spacing:1px;}
.rk-alt .rk-no{background:var(--gold);color:var(--ink);}
.rk-h h3{margin:0;font-size:20px;color:#fff;letter-spacing:1px;}
.rk-list{list-style:none;margin:0;padding:0;}
.rk-list li{display:flex;align-items:center;gap:10px;padding:10px 4px;border-bottom:1px solid rgba(255,255,255,.05);}
.rk-list li:last-child{border-bottom:none;}
.rk-list i{font-style:normal;width:22px;height:22px;border-radius:50%;background:var(--gold);color:var(--ink);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;flex:0 0 auto;}
.rk-list li:nth-child(n+4) i{background:rgba(212,160,23,.3);color:#c8b870;}
.rk-list b{font-size:15px;color:#f0e8d6;flex:1;}
.rk-list span{font-size:12px;color:#8a8070;}
.rk-more{display:inline-block;margin-top:14px;color:var(--gold-l);text-decoration:none;font-size:13px;letter-spacing:.5px;}
.rk-more:hover{color:#fff;}

/* 阅读体验 */
.read-in{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;}
.read-l h2{margin:12px 0;font-size:28px;letter-spacing:1px;}
.read-l h2::after{content:"";display:block;width:56px;height:4px;margin:14px 0 0;background:linear-gradient(90deg,var(--red),var(--gold));}
.r-list{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:12px;}
.r-list li{display:flex;gap:16px;align-items:center;background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--red);border-radius:3px;padding:13px 18px;}
.r-list li:nth-child(even){border-left-color:var(--gold);}
.r-list b{flex:0 0 100px;font-size:14.5px;color:var(--red);letter-spacing:.5px;}
.r-list li:nth-child(even) b{color:var(--gold-d);}
.r-list span{font-size:13.5px;color:var(--tx);}

.phone-mock{max-width:300px;margin:0 auto;}
.pm-screen{background:var(--paper);border:8px solid var(--ink);border-radius:28px;padding:12px 16px 16px;box-shadow:0 16px 34px rgba(26,26,26,.25);}
.pm-status{text-align:center;font-size:12px;color:var(--tx);margin-bottom:10px;}
.pm-chapter{text-align:center;font-size:14px;color:var(--ink);font-weight:700;padding:8px 0;border-bottom:1px solid var(--line);margin-bottom:12px;}
.pm-text p{margin:0 0 12px;font-size:14px;line-height:1.85;color:#4a3f30;text-align:justify;}

/* 界面实拍截图 */
.shot-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;align-items:stretch;}
.sw{margin:0;position:relative;background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;box-shadow:0 10px 22px rgba(26,26,26,.14);transition:transform .25s;}
.sw img{width:100%;height:auto;display:block;}
.sw-tag{position:absolute;top:10px;left:50%;transform:translateX(-50%);background:var(--red);color:#fff;font-size:11px;font-weight:700;letter-spacing:2px;padding:3px 16px;border-radius:2px;z-index:3;}
.sw:nth-child(even) .sw-tag{background:var(--gold);color:var(--ink);}
.sw:hover{transform:translateY(-6px);box-shadow:0 16px 30px rgba(26,26,26,.22);}

/* FAQ 折叠时间线 */
.faq-timeline{max-width:860px;margin:0 auto;position:relative;padding-left:36px;}
.faq-timeline::before{content:"";position:absolute;left:11px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--red),var(--gold));}
.ft{position:relative;margin-bottom:14px;background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;box-shadow:0 8px 18px rgba(26,26,26,.08);}
.ft-dot{position:absolute;left:-31px;top:18px;width:16px;height:16px;border-radius:50%;background:var(--red);border:3px solid #fff;box-shadow:0 0 0 2px var(--red);z-index:2;}
.ft:nth-child(even) .ft-dot{background:var(--gold);box-shadow:0 0 0 2px var(--gold);}
.ft-h{width:100%;display:flex;align-items:center;gap:14px;background:none;border:none;padding:16px 18px;cursor:pointer;text-align:left;font-size:16px;color:var(--ink);font-family:inherit;}
.ft-h:hover b{color:var(--red);}
.ft-no{flex:0 0 auto;background:var(--red);color:#fff;font-size:12px;font-weight:700;padding:3px 10px;border-radius:2px;letter-spacing:1px;}
.ft:nth-child(even) .ft-no{background:var(--gold);color:var(--ink);}
.ft-h b{font-weight:700;letter-spacing:.5px;transition:color .2s;}
.ft-arr{flex:0 0 auto;margin-left:auto;width:9px;height:9px;border-right:2px solid var(--red);border-bottom:2px solid var(--red);transform:rotate(45deg);transition:transform .28s;}
.ft.on .ft-arr{transform:rotate(225deg);}
.ft-b{max-height:0;overflow:hidden;transition:max-height .38s ease;}
.ft.on .ft-b{max-height:420px;}
.ft-b p{margin:0 18px 18px 58px;color:var(--tx);font-size:14.5px;line-height:1.9;text-align:justify;}

/* 读者留言：卷轴 */
.scroll-msgs{display:flex;flex-direction:column;gap:22px;max-width:880px;margin:0 auto;}
.sm{position:relative;background:#fff;border:1px solid var(--line);border-radius:4px;padding:24px 26px 16px;width:88%;max-width:660px;box-shadow:6px 8px 0 rgba(200,22,29,.12);transition:transform .25s;}
.sm-l{margin-right:auto;}
.sm-r{margin-left:auto;box-shadow:-6px 8px 0 rgba(212,160,23,.16);}
.sm-rod{position:absolute;top:-6px;left:0;right:0;height:12px;background:linear-gradient(90deg,var(--red),var(--gold),var(--red));border-radius:4px 4px 0 0;}
.sm-r .sm-rod{background:linear-gradient(90deg,var(--gold),var(--red),var(--gold));}
.sm p{margin:8px 0 12px;color:#4a4032;font-size:14.5px;line-height:1.9;text-align:justify;}
.sm footer{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;padding-top:10px;border-top:1px dashed var(--line);}
.sm footer b{color:var(--red);font-size:14px;}
.sm-r footer b{color:var(--gold-d);}
.sm time{color:#9a8f7a;font-size:12.5px;font-variant-numeric:tabular-nums;}
.sm:hover{transform:translateY(-4px);}

/* 印章封缄下载 */
.dlwrap{background:var(--ink);padding:70px 0 78px;}
.stamp-dl{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--red-d),var(--red));border-radius:6px;padding:44px 50px;display:flex;align-items:center;justify-content:space-between;gap:32px;box-shadow:0 18px 36px rgba(200,22,29,.30);border:2px solid var(--gold);}
.stamp-dl::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--gold-l),rgba(232,195,74,.2),var(--gold-l));}
.sd-l b{display:block;font-size:24px;color:#fff;letter-spacing:1px;}
.sd-l p{margin:9px 0 0;color:rgba(255,255,255,.85);font-size:14.5px;}
.sd-btn{flex:0 0 auto;background:var(--gold);color:var(--ink);font-weight:800;font-size:17px;letter-spacing:2px;text-decoration:none;padding:16px 44px;border-radius:4px;box-shadow:0 5px 0 var(--gold-d);transition:.2s;}
.sd-btn:hover{transform:translateY(3px);box-shadow:0 2px 0 var(--gold-d);}

/* 页脚 */
.ft{background:var(--paper);border-top:3px solid var(--red);padding:40px 0 26px;}
.ft-in{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;}
.ft-links{list-style:none;display:flex;gap:22px;margin:0;padding:0;}
.ft-links a{font-size:13.5px;color:var(--tx);text-decoration:none;}
.ft-links a:hover{color:var(--red);}
.ft-icp{text-align:center;margin-top:22px;}
.ft-icp a{font-size:12.5px;color:#9a8f7a;text-decoration:none;}
.ft-c{text-align:center;font-size:12.5px;color:#9a8f7a;margin-top:6px;}

.backtop{position:fixed;right:22px;bottom:160px;z-index:55;width:46px;height:46px;border-radius:4px;border:none;cursor:pointer;background:var(--red);color:#fff;font-size:19px;opacity:0;visibility:hidden;transform:translateY(14px);transition:.3s;}
.backtop.show{opacity:1;visibility:visible;transform:none;}
.backtop:hover{background:var(--gold);color:var(--ink);}

.rv{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease;}
.rv.vis{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}.rv{opacity:1;transform:none;transition:none;}}

@media (max-width:980px){
  .hero-in,.read-in{grid-template-columns:1fr;gap:44px;}
  .hero-l h1{font-size:46px;}
  .ranks{grid-template-columns:1fr;}
  .shot-wall{grid-template-columns:repeat(2,1fr);}
  .nav{position:absolute;top:66px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:8px 0;display:none;box-shadow:0 18px 30px rgba(26,26,26,.12);}
  .nav.open{display:flex;}
  .nav a{padding:13px 26px;border-bottom:none;}
  .nav a.on{background:var(--paper);}
  .burger{display:flex;}
}
@media (max-width:767px){
  [id]{scroll-margin-top:72px;}
  .hd-in{height:60px;gap:14px;}
  .nav{top:60px;}
  .hd-cta{display:none;}
  .hero{padding:46px 0 66px;}
  .hero-l h1{font-size:40px;}
  .hero-acts .btn{flex:1 1 100%;}
  .book-open{height:auto;display:flex;gap:12px;justify-content:center;}
  .bo-page{position:relative;width:45%;max-width:170px;height:auto;transform:none;margin:0;}
  .bo-l,.bo-r{transform:none;}
  .bo-spine,.bo-seal{display:none;}
  .sec{padding:58px 0;}
  .sec-h{margin-bottom:34px;}
  .sec-h h2{font-size:23px;}
  .cate-scroll{padding:44px 0 36px;}
  .cat{min-width:64px;padding:8px 16px;font-size:14px;}
  .r-list b{flex-basis:80px;}
  .shot-wall{display:flex;overflow-x:auto;flex-wrap:nowrap;gap:12px;padding-bottom:6px;scroll-snap-type:x mandatory;}
  .sw{flex:0 0 auto;width:150px;scroll-snap-align:start;}
  .sw img{width:150px;}
  .faq-timeline{padding-left:28px;}
  .ft-dot{left:-23px;}
  .ft-b p{margin:0 14px 16px 14px;padding-left:0;}
  .sm{width:100%;padding:20px 16px 14px;}
  .stamp-dl{flex-direction:column;align-items:flex-start;padding:34px 26px;}
  .sd-btn{align-self:center;}
  .backtop{bottom:150px;right:16px;width:42px;height:42px;}
  .ft-in{justify-content:center;text-align:center;}
}