/* AO3 aao3.cn - 卷宗藏书票版
   四色：红 #9e1c1c × 金 #b8862d × 墨 #1d1a17 × 白 */
:root{
  --red:#9e1c1c;
  --red-d:#7a1212;
  --gold:#b8862d;
  --gold-l:#d9b45a;
  --gold-d:#8a6420;
  --ink:#1d1a17;
  --ink2:#2a2520;
  --paper:#f5efe0;
  --paper-d:#ebe3d0;
  --tx:#5a5042;
  --line:rgba(29,26,23,.16);
}
*{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：卷宗封面 */
.hero{padding:66px 0 88px;background:var(--paper);background-image:repeating-linear-gradient(45deg,rgba(158,28,28,.03) 0 2px,transparent 2px 14px);}
.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:44px;height:22px;display:inline-flex;align-items:center;justify-content:center;border-radius:3px;font-size:11px;padding:0 6px;letter-spacing:1px;}
.hero-l h1{margin:0 0 18px;font-size:60px;line-height:1;letter-spacing:4px;color:var(--ink);}
.hero-l h1::after{content:"";display:block;width:90px;height:6px;margin-top:18px;background:linear-gradient(90deg,var(--red) 0 55%,var(--gold) 55% 100%);border-radius:0;}
.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(158,28,28,.3);border-radius:2px;padding:5px 14px;}

.dossier{position:relative;width:min(420px,100%);margin:0 auto;padding:20px;}
.dos-spine{position:absolute;top:0;bottom:0;left:-6px;width:14px;background:linear-gradient(90deg,var(--red-d),var(--red));border-radius:3px 0 0 3px;box-shadow:inset -2px 0 0 rgba(0,0,0,.2);}
.dos-label{position:absolute;z-index:6;top:10px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--gold-l);padding:6px 24px;border-radius:2px;letter-spacing:3px;font-size:11px;display:flex;flex-direction:column;align-items:center;line-height:1.5;}
.dos-label i{font-style:normal;color:var(--red);font-size:13px;font-weight:800;}
.dos-label b{font-size:12px;}
.dos-page{margin:0;position:absolute;background:#fff;border:1px solid var(--line);border-radius:4px;overflow:hidden;width:46%;box-shadow:0 8px 18px rgba(29,26,23,.22);}
.dos-page img{width:100%;height:auto;display:block;}
.dp-1{position:relative;width:62%;margin:58px auto 0;z-index:3;border:4px solid #fff;}
.dp-tab{position:absolute;top:0;left:50%;transform:translateX(-50%);background:var(--red);color:#fff;font-size:10px;padding:2px 14px;border-radius:0 0 4px 4px;letter-spacing:1px;z-index:2;}
.dp-2{top:60px;left:8px;transform:rotate(-8deg);z-index:1;}
.dp-2 .dp-tab{background:var(--gold);color:var(--ink);}
.dp-3{top:60px;right:8px;transform:rotate(7deg);z-index:2;}
.dp-3 .dp-tab{background:var(--gold);color:var(--ink);}
.dos-seal{position:absolute;z-index:7;bottom:0;right:30px;width:64px;height:64px;border-radius:50%;background:var(--red);display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;box-shadow:0 4px 10px rgba(158,28,28,.4);border:3px solid #fff;}
.dos-seal img{width:26px;height:26px;border-radius:50%;object-fit:cover;}
.dos-seal i{font-style:normal;font-size:10px;letter-spacing:1px;font-weight:700;}

/* 烫金数字条 */
.goldband{background:linear-gradient(135deg,var(--ink),var(--ink2));padding:36px 0;border-top:3px solid var(--gold);border-bottom:3px solid var(--gold);}
.gb-in{display:flex;justify-content:center;gap:56px;flex-wrap:wrap;}
.gb{display:flex;flex-direction:column;align-items:center;gap:6px;}
.gb-n{font-size:36px;font-weight:800;color:var(--gold-l);letter-spacing:1px;font-family:Georgia,serif;}
.gb-l{font-size:12.5px;color:#9c8f76;letter-spacing:3px;}

/* 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:60px;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;}

/* 四扇门厅 */
.doors{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.door{position:relative;display:block;text-decoration:none;background:#fff;border:2px solid var(--line);border-radius:4px;padding:28px 20px 22px;transition:transform .25s,box-shadow .25s;overflow:hidden;}
.door::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:var(--red);}
.door-alt::before{background:var(--gold);}
.door-no{display:inline-block;background:var(--ink);color:var(--gold-l);font-size:11px;letter-spacing:2px;padding:3px 12px;border-radius:2px;margin-bottom:14px;}
.door-handle{position:absolute;top:50%;right:14px;width:10px;height:10px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 3px rgba(184,134,45,.25);}
.door-t h3{margin:0 0 8px;font-size:18px;color:var(--ink);letter-spacing:1px;}
.door-t p{margin:0;font-size:13px;color:var(--tx);line-height:1.75;}
.door:hover{transform:translateY(-5px);box-shadow:0 12px 24px rgba(158,28,28,.18);}
.door-alt:hover{box-shadow:0 12px 24px rgba(184,134,45,.22);}

/* 双语翻译器 */
.trans-in{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;}
.trans-l h2{margin:12px 0;font-size:28px;letter-spacing:1px;}
.trans-l h2::after{content:"";display:block;width:56px;height:4px;margin:14px 0 0;background:linear-gradient(90deg,var(--red),var(--gold));}
.t-feats{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:12px;}
.t-feats li{display:flex;gap:16px;align-items:center;background:rgba(255,255,255,.06);border:1px solid rgba(184,134,45,.3);border-left:4px solid var(--gold);border-radius:3px;padding:13px 18px;}
.t-feats li:nth-child(even){border-left-color:var(--red);}
.t-feats b{flex:0 0 100px;font-size:14.5px;color:var(--gold-l);letter-spacing:.5px;}
.t-feats li:nth-child(even) b{color:#e89a9a;}
.t-feats span{font-size:13.5px;color:#c8bfa8;}

.t-panel{background:var(--paper);border:2px solid var(--gold);border-radius:6px;overflow:hidden;box-shadow:12px 14px 0 rgba(184,134,45,.15);}
.tp-head{display:flex;align-items:center;gap:10px;background:var(--ink);color:var(--gold-l);padding:10px 16px;font-size:13px;letter-spacing:1px;}
.tp-dot{width:10px;height:10px;border-radius:50%;background:var(--red);}
.tp-row{display:flex;justify-content:space-between;padding:11px 18px;border-bottom:1px dashed var(--line);font-size:13.5px;}
.tp-row label{color:var(--gold-d);font-weight:700;letter-spacing:.5px;}
.tp-row span{color:var(--ink);}
.tp-preview{padding:16px 18px;background:#fff;}
.tp-preview p{margin:0 0 8px;font-size:13px;line-height:1.7;padding:8px 12px;border-radius:3px;}
.tp-en{background:rgba(29,26,23,.05);color:var(--ink);}
.tp-cn{background:rgba(158,28,28,.08);color:var(--red-d);margin-bottom:0 !important;}

/* 卷宗插页截图 */
.dossier-shots{display:flex;flex-wrap:nowrap;justify-content:center;gap:14px;align-items:stretch;overflow-x:auto;padding:6px 4px 10px;}
.ds{margin:0;position:relative;background:#fff;border:1px solid var(--line);border-radius:4px;padding:6px;box-shadow:0 8px 18px rgba(29,26,23,.14);transition:transform .25s;flex:0 0 auto;display:flex;flex-direction:column;}
.ds img{width:auto;max-width:200px;height:auto;display:block;border-radius:2px;flex:1;}
.ds:hover{transform:translateY(-6px);z-index:10;box-shadow:0 14px 28px rgba(29,26,23,.22);}
.ds-sticker{position:absolute;top:-8px;left:50%;transform:translateX(-50%);background:var(--red);color:#fff;font-size:11px;font-weight:700;letter-spacing:2px;padding:3px 14px;border-radius:2px;z-index:3;white-space:nowrap;}
.ds-st-gold{background:var(--gold);color:var(--ink);}

/* 卷宗问答 FAQ */
.dossier-faq{display:grid;grid-template-columns:280px 1fr;gap:0;background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;box-shadow:0 18px 36px rgba(29,26,23,.12);}
.df-list{background:var(--ink);padding:14px 0;}
.df-btn{width:100%;display:flex;align-items:center;gap:12px;background:none;border:none;padding:14px 22px;cursor:pointer;text-align:left;color:#b8ad94;font-size:15px;font-family:inherit;border-left:3px solid transparent;transition:.2s;}
.df-btn:hover{color:#fff;background:rgba(255,255,255,.04);}
.df-btn.on{color:var(--gold-l);background:rgba(184,134,45,.1);border-left-color:var(--gold);font-weight:700;}
.df-no{flex:0 0 auto;background:var(--red);color:#fff;font-size:11px;font-weight:700;padding:3px 9px;border-radius:2px;letter-spacing:1px;}
.df-btn.on .df-no{background:var(--gold);color:var(--ink);}
.df-body{padding:30px 36px;position:relative;background:var(--paper);}
.df-body::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--red) 0 50%,var(--gold) 50% 100%);}
.df-pane{display:none;}
.df-pane.on{display:block;}
.df-pane h3{margin:0 0 14px;font-size:21px;color:var(--ink);letter-spacing:.5px;}
.df-pane h3::after{content:"";display:block;width:40px;height:3px;margin-top:10px;background:var(--red);}
.df-pane p{margin:0;color:var(--tx);font-size:14.5px;line-height:1.95;text-align:justify;}

/* 读者来信：信封 */
.envelopes{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.env{position:relative;background:#fff;border:1px solid var(--line);border-radius:4px;padding:40px 22px 18px;margin-top:14px;box-shadow:0 10px 22px rgba(29,26,23,.12);transition:transform .25s;}
.env::before{content:"";position:absolute;top:0;left:0;right:0;height:34px;background:var(--red);border-radius:4px 4px 0 0;}
.env-gold::before{background:var(--gold);}
.env-flap{position:absolute;top:0;left:0;right:0;height:34px;background:inherit;clip-path:polygon(0 0,100% 0,50% 100%);z-index:2;}
.env::before,.env-flap{background:var(--red);}
.env-gold::before,.env-gold .env-flap{background:var(--gold);}
.env-stamp{position:absolute;top:7px;right:16px;z-index:3;background:#fff;color:var(--red);font-size:11px;font-weight:800;letter-spacing:2px;padding:3px 10px;border-radius:2px;border:1px dashed var(--red);}
.env-gold .env-stamp{color:var(--gold-d);border-color:var(--gold-d);}
.env p{margin:0 0 14px;color:#4a4032;font-size:14px;line-height:1.85;text-align:justify;}
.env footer{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;padding-top:10px;border-top:1px dashed var(--line);}
.env footer b{color:var(--red);font-size:13.5px;}
.env-gold footer b{color:var(--gold-d);}
.env time{color:#9a8f7a;font-size:12px;font-variant-numeric:tabular-nums;}
.env:hover{transform:translateY(-4px);}

/* 蜡封下载 */
.dlwrap{background:var(--ink);padding:70px 0 78px;}
.wax-seal{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(158,28,28,.30);border:2px solid var(--gold);}
.wax-seal::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--gold-l),rgba(217,180,90,.2),var(--gold-l));}
.ws-l b{display:block;font-size:24px;color:#fff;letter-spacing:1px;}
.ws-l p{margin:9px 0 0;color:rgba(255,255,255,.85);font-size:14.5px;}
.ws-btn{flex:0 0 auto;position:relative;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;}
.ws-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,.trans-in{grid-template-columns:1fr;gap:44px;}
  .hero-l h1{font-size:46px;}
  .doors{grid-template-columns:repeat(2,1fr);}
  .envelopes{grid-template-columns:repeat(2,1fr);}
  .dossier-faq{grid-template-columns: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(29,26,23,.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%;}
  .dossier{padding:16px 10px;}
  .gb-in{gap:26px;}
  .gb-n{font-size:28px;}
  .sec{padding:58px 0;}
  .sec-h{margin-bottom:34px;}
  .sec-h h2{font-size:23px;}
  .doors{grid-template-columns:1fr;}
  .door-handle{display:none;}
  .t-feats b{flex-basis:80px;}
  .dossier-shots{gap:12px;justify-content:flex-start;}
  .ds img{max-width:160px;}
  .df-list{padding:8px 0;}
  .df-btn{padding:12px 16px;font-size:14px;}
  .df-body{padding:22px 18px;}
  .envelopes{grid-template-columns:1fr;}
  .wax-seal{flex-direction:column;align-items:flex-start;padding:34px 26px;}
  .ws-btn{align-self:center;}
  .backtop{bottom:150px;right:16px;width:42px;height:42px;}
  .ft-in{justify-content:center;text-align:center;}
}