:root{
  --bg:#f7f7f9; --card:#fff; --line:#ececf0;
  --acc:#ff5a1f; --acc2:#ff8a3d;
  --txt:#1a1a1a; --dim:#9a9aa5;
  --radius:14px;
  --tabh:58px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue",Arial,sans-serif}
.hidden{display:none!important}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{text-decoration:none;color:inherit}

/* 顶部搜索 */
.top{position:sticky;top:0;z-index:30;background:#fff;padding:calc(10px + env(safe-area-inset-top)) 14px 10px;
  border-bottom:1px solid var(--line)}
.search{display:flex;align-items:center;gap:8px;background:#f2f2f5;border-radius:20px;padding:9px 14px}
.search .ico{font-size:14px;opacity:.5}
.search input{flex:1;border:0;background:transparent;font-size:15px;outline:none;color:var(--txt)}
.qclear{color:#9a9aa5;font-size:14px;padding:2px 4px}

/* 面板 */
main{padding:14px 12px calc(var(--tabh) + 34px + env(safe-area-inset-bottom))}
.pane-hd{display:flex;align-items:baseline;justify-content:space-between;margin:2px 2px 14px}
.pane-hd h2{font-size:18px;margin:0;font-weight:800;letter-spacing:.5px}
.reshuffle{font-size:13px;color:var(--acc);font-weight:600;padding:4px 2px}
.cnum{font-size:12px;color:var(--dim)}

/* 书籍网格（三列） */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px 12px}
@media(min-width:640px){.grid{grid-template-columns:repeat(5,1fr)}}
@media(min-width:1000px){.grid{grid-template-columns:repeat(7,1fr)}}

.book{display:block;position:relative}
.cover{aspect-ratio:3/4;border-radius:10px;overflow:hidden;position:relative;
  box-shadow:0 4px 12px #00000014;display:flex;align-items:center;justify-content:center}
.cover .ph{width:100%;height:100%;display:flex;align-items:center;justify-content:center;
  padding:8px;text-align:center;font-size:15px;font-weight:700;line-height:1.3;
  color:#ffffffdd;letter-spacing:.5px;overflow:hidden}
.btitle{font-size:13px;line-height:1.35;margin-top:7px;color:var(--txt);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.bauthor{font-size:11px;color:var(--dim);margin-top:3px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 卡片右上角「上架」小按钮 */
.addbtn{position:absolute;top:6px;right:6px;width:26px;height:26px;border-radius:50%;
  background:#00000073;color:#fff;font-size:16px;line-height:1;
  display:flex;align-items:center;justify-content:center;backdrop-filter:blur(4px);
  border:1px solid #ffffff33;z-index:2}
.addbtn.on{background:linear-gradient(135deg,var(--acc),var(--acc2));border-color:transparent;font-size:13px}

/* 状态 / 更多 */
.status{text-align:center;color:var(--dim);font-size:13px;padding:26px 0}
.status:empty{display:none}
.more{display:block;margin:18px auto 0;padding:10px 26px;border-radius:20px;
  background:#fff;border:1px solid var(--line);font-size:14px;color:#555}

/* 全部分类列表 */
.clslist{background:#fff;border-radius:var(--radius);overflow:hidden}
.cls{display:flex;align-items:center;gap:10px;padding:16px 16px;
  border-bottom:1px solid #f4f4f7;font-size:16px}
.cls:last-child{border-bottom:0}
.cls:active{background:#fafafa}
.cls .cn{flex:1;font-weight:600}
.cls .cc{font-size:12px;color:var(--dim)}
.cls .ar{color:#c8c8cf;font-size:18px}

/* 分类页顶栏 */
.catbar{display:flex;align-items:center;gap:10px;margin:0 2px 16px}
.cback{width:32px;height:32px;border-radius:50%;background:#fff;border:1px solid var(--line);
  font-size:20px;line-height:1;display:flex;align-items:center;justify-content:center}
.catbar b{font-size:17px}
.catbar .cnum{margin-left:auto}

/* 书架空状态 */
.empty-state{text-align:center;padding:56px 24px;color:var(--dim)}
.empty-state .es-ico{font-size:44px;margin-bottom:14px;opacity:.7}
.empty-state p{margin:0 0 6px;font-size:15px;color:#555;font-weight:600}
.empty-state .es-sub{font-size:13px;color:var(--dim);font-weight:400;
  line-height:1.6;margin-bottom:20px}
.btn-main.slim{display:inline-block;flex:none;padding:12px 26px;font-size:14px}

/* 历史列表 */
.histlist{display:flex;flex-direction:column;gap:10px}
.hitem{display:flex;align-items:center;gap:12px;background:#fff;border-radius:12px;padding:10px}
.hitem:active{background:#fafafa}
.hc{width:48px;height:64px;border-radius:7px;overflow:hidden;flex:0 0 48px}
.hc .ph{width:100%;height:100%;display:flex;align-items:center;justify-content:center;
  font-size:11px;font-weight:700;color:#ffffffdd;padding:3px;text-align:center;line-height:1.2}
.hi{flex:1;min-width:0}
.hn{font-size:14.5px;font-weight:600;line-height:1.35;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.hm{font-size:12px;color:var(--dim);margin-top:5px}
.hgo{font-size:13px;color:var(--acc);font-weight:700;padding:8px 10px;white-space:nowrap}

/* 详情 */
.detail{position:fixed;inset:0;z-index:60;background:var(--bg);overflow-y:auto;
  padding:calc(56px + env(safe-area-inset-top)) 18px calc(30px + env(safe-area-inset-bottom))}
.dback{position:fixed;top:calc(10px + env(safe-area-inset-top));left:12px;z-index:61;
  width:38px;height:38px;border-radius:50%;background:#ffffffcc;backdrop-filter:blur(8px);
  font-size:22px;line-height:1;display:flex;align-items:center;justify-content:center}
.dhead{display:flex;gap:14px;margin-bottom:18px}
.dcover{width:104px;height:139px;border-radius:10px;flex:0 0 104px;overflow:hidden;
  box-shadow:0 8px 20px #0000001f;display:flex;align-items:center;justify-content:center}
.dcover .ph{width:100%;height:100%;display:flex;align-items:center;justify-content:center;
  padding:8px;text-align:center;font-size:16px;font-weight:700;color:#ffffffdd}
.dinfo h1{font-size:19px;margin:0 0 10px;line-height:1.35}
.dtags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.dtag{font-size:11px;padding:3px 9px;border-radius:10px;background:#fff3ec;color:#e85a25}
.dmeta{font-size:12px;color:var(--dim)}
.dsummary{font-size:14px;line-height:1.75;color:#4a4a52;background:#fff;
  border-radius:var(--radius);padding:14px;margin:0 0 20px}
.dact{display:flex;gap:10px}
.btn-main{flex:1;text-align:center;padding:14px;border-radius:12px;font-weight:700;
  color:#fff;background:linear-gradient(135deg,var(--acc),var(--acc2));
  box-shadow:0 6px 18px #ff5a1f33}
.btn-ghost{padding:14px 18px;border-radius:12px;background:#fff;border:1px solid var(--line);
  color:#666;font-size:14px;white-space:nowrap}
.btn-ghost.on{color:var(--acc);border-color:#ffd4c2;background:#fff7f3;font-weight:600}

/* 底部导航 */
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:50;display:flex;
  background:#fffffff2;backdrop-filter:blur(14px);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom)}
.tb{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:var(--tabh);color:#8b8b96;font-size:11px}
.tb i{font-size:17px;font-style:normal;line-height:1}
.tb.on{color:var(--acc);font-weight:700}
.tb.on i{transform:translateY(-1px)}

/* 轻提示 */
.toast{position:fixed;left:50%;bottom:calc(var(--tabh) + 26px);transform:translate(-50%,10px);
  background:#000000d9;color:#fff;font-size:13px;padding:9px 18px;border-radius:20px;
  opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:80}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- 全部分类：左栏 + 右侧书单 ---------- */
.split{display:flex;gap:12px;align-items:flex-start}
.sidebar{flex:0 0 96px;width:96px;position:sticky;top:52px;
  max-height:calc(100vh - 170px);overflow-y:auto;-webkit-overflow-scrolling:touch;
  background:#fff;border-radius:12px;padding:6px 0;scrollbar-width:none}
.sidebar::-webkit-scrollbar{display:none}
.sitem{padding:11px 10px;font-size:13px;line-height:1.3;color:#5a5a66;
  display:flex;flex-direction:column;gap:2px;position:relative;border-radius:8px;margin:0 5px}
.sitem span{font-size:10px;color:#c0c0c8}
.sitem.on{background:#fff3ec;color:var(--acc);font-weight:700}
.sitem.on span{color:#e7a184}
.scontent{flex:1;min-width:0}
.catbar{display:flex;align-items:baseline;gap:8px;margin:0 2px 12px}
.catbar b{font-size:16px;font-weight:800}
.catbar .cnum{margin-left:auto;font-size:12px;color:var(--dim)}
.grid.narrow{grid-template-columns:repeat(2,1fr);gap:14px 10px}
@media(min-width:560px){.grid.narrow{grid-template-columns:repeat(4,1fr)}}
@media(min-width:900px){.grid.narrow{grid-template-columns:repeat(6,1fr)}}
.grid.narrow .cover .ph{font-size:13px}
.grid.narrow .btitle{font-size:12.5px}

/* ---------- 账号同步 ---------- */
.syncbar{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:11px 14px;margin:0 2px 14px}
.syncbar #syncMsg{flex:1;font-size:12.5px;color:var(--dim)}
.syncbtn{font-size:13px;font-weight:700;color:var(--acc);white-space:nowrap}
.syncbar.on #syncMsg{color:var(--txt)}
.mask2{position:fixed;inset:0;background:#0007;z-index:90}
.modal{position:fixed;left:20px;right:20px;top:50%;transform:translateY(-50%);z-index:91;
  background:#fff;border-radius:18px;padding:22px 20px 18px;box-shadow:0 20px 50px #00000033}
.modal h3{margin:0 0 8px;font-size:17px}
.modal .msub{font-size:12.5px;color:var(--dim);line-height:1.6;margin:0 0 14px}
.modal input{width:100%;padding:12px 14px;margin-bottom:10px;border-radius:10px;
  border:1px solid var(--line);background:#fafafa;font-size:15px;outline:none}
.modal input:focus{border-color:var(--acc);background:#fff}
.modal .lerr{color:#e5484d;font-size:12.5px;min-height:16px;margin:0 0 8px}
.modal .mact{display:flex;gap:10px}
.modal .mact .btn-main{flex:1}

/* 真封面盖在占位色块上，取不到就露出底色 */
.cover{position:relative}
.cover .cv{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.hc{position:relative}
.hc .cv{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.dcover{position:relative}
.dcover .cv{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.dtag.plain{background:#f2f2f5;color:#6b6b76}