/* 易学课程总目录 · 共用样式 */
:root{--ink:#1c1409;--gold:#8a6a3a;--gold-l:#b8945f;--line:#e6dccb;
  --bg:#fbf8f2;--card:#fff;--muted:#8d7a60}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Microsoft YaHei','PingFang SC',-apple-system,sans-serif;
  color:var(--ink);background:var(--bg);font-size:14px;line-height:1.6;
  -webkit-text-size-adjust:100%}
a{color:inherit;text-decoration:none}

/* ---------- 顶部 ---------- */
.hero{background:linear-gradient(150deg,#3a2716,#241a10 60%,#1b120b);
  color:#f2e8d8;padding:38px 0 26px}
.in{max-width:1080px;margin:0 auto;padding:0 20px}
.hero .brand{font-size:11px;letter-spacing:.42em;color:var(--gold-l);margin-bottom:12px}
.hero h1{font-size:30px;letter-spacing:.1em;font-weight:700;line-height:1.35}
.hero .sub{font-size:13px;color:#c4b39a;margin-top:8px;letter-spacing:.04em}
.stats{display:flex;flex-wrap:wrap;gap:26px;margin-top:18px}
.stats b{display:block;font-size:22px;color:var(--gold-l);font-family:Georgia,serif}
.stats div{font-size:11px;color:#a3907a}

/* ---------- 字母导航 ---------- */
.alpha{position:sticky;top:0;z-index:30;background:#fffdf8f2;
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
  box-shadow:0 2px 10px #0000000a}
.alpha .in{display:flex;gap:0;overflow-x:auto;scrollbar-width:none;padding:0 12px}
.alpha .in::-webkit-scrollbar{display:none}
.alpha a{flex:none;padding:12px 9px;font-size:13px;font-weight:700;
  color:#a8987f;letter-spacing:.05em;border-bottom:2px solid transparent}
.alpha a.on{color:var(--gold);border-bottom-color:var(--gold)}
.alpha a:hover{color:var(--ink)}
.alpha .off{flex:none;padding:12px 9px;font-size:13px;font-weight:700;
  color:#d9cdb8;letter-spacing:.05em;cursor:default}

main{max-width:1080px;margin:0 auto;padding:22px 20px 70px}

/* ---------- 首页 ---------- */
.search{position:relative;margin:-26px 0 26px;z-index:20}
.search input{width:100%;padding:15px 20px;border-radius:10px;border:1px solid var(--line);
  background:#fff;font-size:15px;outline:none;font-family:inherit;
  box-shadow:0 6px 24px #0000000f;color:var(--ink)}
.search input:focus{border-color:var(--gold-l);box-shadow:0 6px 24px #8a6a3a26}
.hits{margin-top:8px;background:#fff;border:1px solid var(--line);border-radius:10px;
  overflow:hidden;box-shadow:0 8px 28px #00000014;display:none}
.hits.on{display:block}
.hits a{display:block;padding:11px 16px;border-bottom:1px solid #f2ece1;font-size:13.5px}
.hits a:last-child{border-bottom:none}
.hits a:hover{background:#fbf6ec}
.hits .t{color:var(--gold);font-weight:700;margin-right:8px}
.hits .c{color:var(--muted);font-size:12px}
.hits .empty{padding:14px 16px;color:var(--muted);font-size:13px}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.lc{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 16px;
  transition:.15s}
.lc:hover{border-color:var(--gold-l);box-shadow:0 6px 18px #8a6a3a1a;transform:translateY(-1px)}
.lc b{font-size:20px;font-family:Georgia,serif;color:var(--gold)}
.lc .n{font-size:11px;color:var(--muted);margin-left:6px}
.lc p{font-size:12.5px;color:#5c4a35;margin-top:6px;line-height:1.7}

/* ---------- 讲者索引 ---------- */
.idx{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;
  margin-top:26px}
.idx h2{font-size:12px;letter-spacing:.24em;color:var(--gold);margin-bottom:10px}
.idx .row{display:flex;gap:8px;padding:4px 0;border-bottom:1px dotted #f0e8da}
.idx .row:last-child{border-bottom:none}
.idx .row>b{flex:none;width:16px;font-family:Georgia,serif;color:var(--gold);font-size:13px}
.idx .ns{display:flex;flex-wrap:wrap;gap:2px 12px}
.idx .ns a{font-size:13px;color:#3a2e1f;white-space:nowrap}
.idx .ns a:hover{color:var(--gold)}
.idx .ns i{font-style:normal;color:#c0b09a;font-size:10.5px;margin-left:2px}

/* ---------- 字母页 ---------- */
.lhead{display:flex;align-items:baseline;gap:14px;margin:6px 0 16px;
  border-bottom:2px solid var(--ink);padding-bottom:8px}
.lhead h2{font-size:32px;font-family:Georgia,serif;letter-spacing:.04em}
.lhead span{font-size:13px;color:var(--muted)}

.tc{background:#fff;border:1px solid var(--line);border-radius:10px;
  padding:16px 18px;margin-bottom:14px;scroll-margin-top:56px}
.tc-h{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;
  border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:10px}
.tc-h h3{font-size:17px;color:var(--gold);letter-spacing:.03em}
.tc-h .no{font-size:10px;font-weight:700;color:#fff;background:var(--gold);
  padding:2px 7px;border-radius:9px;letter-spacing:.08em}
.tc-h .meta{margin-left:auto;font-size:12px;color:var(--muted);display:flex;gap:14px}
.tc-h .meta b{color:var(--ink);font-size:14px}

.co{margin-bottom:12px;padding-left:10px;border-left:2px solid #f0e8da}
.co-h{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.co-h h4{font-size:14px;font-weight:700;color:#2a2014}
.co-h .n{font-size:11px;color:var(--muted);white-space:nowrap}
.its{list-style:none;margin-top:5px}
.its li{font-size:12.5px;color:#6b5f4f;line-height:1.75;padding-left:12px;
  text-indent:-12px;word-break:break-all}
.its li::before{content:'·';color:#c0b09a;margin-right:5px}
.its li.dir::before{content:'▸';color:var(--gold-l)}
.more{display:inline-block;margin-top:5px;font-size:12px;color:var(--gold);
  cursor:pointer;border-bottom:1px dashed var(--gold-l)}
.empty{font-size:12.5px;color:#b8a891;font-style:italic}

footer{background:#241a10;color:#a3907a;padding:24px 0;font-size:12px;line-height:1.9}
footer b{color:#d8c5a8}

/* ---------- 购买入口 ---------- */
.hcta{display:inline-block;margin-top:20px;padding:10px 22px;border-radius:999px;
  background:var(--gold-l);color:#241a10;font-size:13px;font-weight:700;
  letter-spacing:.1em;transition:.15s;border:none;font-family:inherit;cursor:pointer}
.hcta:hover{background:#d6b482;transform:translateY(-1px)}

.fab{position:fixed;right:18px;bottom:18px;z-index:60;border:none;cursor:pointer;
  display:flex;align-items:center;gap:7px;padding:12px 19px;border-radius:999px;
  background:linear-gradient(140deg,#8a6a3a,#664b25);color:#fff;font-size:14px;
  font-weight:700;font-family:inherit;letter-spacing:.07em;
  box-shadow:0 8px 26px #6d512966;transition:.15s}
.fab:hover{transform:translateY(-2px);box-shadow:0 12px 30px #6d512980}
.fab i{font-style:normal;font-size:15px}

.buy-s{flex:none;padding:3px 10px;border-radius:6px;cursor:pointer;font-family:inherit;
  border:1px solid var(--gold-l);background:#fdf8ef;color:var(--gold);
  font-size:11.5px;font-weight:700;letter-spacing:.1em;transition:.15s}
.buy-s:hover{background:var(--gold);color:#fff;border-color:var(--gold)}

/* ---------- 购买面板 ---------- */
.mask{position:fixed;inset:0;background:#1c1409a6;z-index:80;opacity:0;
  pointer-events:none;transition:.18s;backdrop-filter:blur(2px)}
.mask.on{opacity:1;pointer-events:auto}
.panel{position:fixed;z-index:90;left:50%;top:50%;width:min(382px,calc(100vw - 30px));
  background:#fff;border-radius:14px;padding:26px 24px 22px;
  transform:translate(-50%,-46%) scale(.97);opacity:0;pointer-events:none;
  transition:.2s;box-shadow:0 24px 70px #0000004d}
.panel.on{opacity:1;pointer-events:auto;transform:translate(-50%,-50%) scale(1)}
.panel .x{position:absolute;right:11px;top:9px;border:none;background:none;
  font-size:22px;line-height:1;color:#c0b09a;cursor:pointer;padding:4px 9px;font-family:inherit}
.panel .x:hover{color:var(--ink)}
.panel h3{font-size:17px;letter-spacing:.05em;padding-right:26px}
.panel .sub{font-size:12px;color:var(--muted);margin:5px 0 16px;line-height:1.75}
.qr{display:block;width:180px;height:180px;margin:0 auto 14px;background:#fff;
  border:1px solid var(--line);border-radius:8px;object-fit:contain}

/* 通道卡片：QQ / 微信 / 闲鱼 并列，谁都能当主入口 */
.chan{display:flex;flex-direction:column;gap:9px}
.ci{display:block;border:1px solid var(--line);border-radius:10px;
  padding:12px 14px;background:#fdfaf4;transition:.15s}
a.ci:hover{border-color:var(--gold-l);background:#fdf6e9;
  box-shadow:0 4px 16px #8a6a3a1f;transform:translateY(-1px)}
.ci-h{display:flex;align-items:baseline;gap:8px;margin-bottom:7px}
.ci-h b{font-size:14px;color:var(--ink);letter-spacing:.05em}
.ci-h span{font-size:11px;color:#a3907a}
.ci-b{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.ci-b .num{font-size:17.5px;font-weight:700;color:var(--gold);letter-spacing:.05em}
.cbtn{border:1px solid var(--gold-l);background:#fff;color:var(--gold);
  font-size:12px;font-weight:700;padding:4px 14px;border-radius:6px;
  cursor:pointer;font-family:inherit;transition:.15s}
.cbtn:hover{background:var(--gold);color:#fff}
.ci .note{font-size:11.5px;color:#8d7a60;line-height:1.7}
.ci-go{margin-left:auto;font-size:12.5px;font-weight:700;color:var(--gold);
  white-space:nowrap}
.ci-go.muted{color:#b8a68a;font-weight:400;font-size:11.5px}

.wxrow{display:flex;align-items:center;justify-content:center;gap:9px;
  font-size:12.5px;color:#6b5f4f;margin-bottom:14px}
.wxrow b{font-size:15px;color:var(--ink);letter-spacing:.04em}
.wxrow button{border:1px solid var(--line);background:#fbf6ec;color:var(--gold);
  font-size:11.5px;padding:3px 9px;border-radius:5px;cursor:pointer;font-family:inherit}
.wxrow button:hover{background:#f5ecdb}
.pbtn{display:block;width:100%;text-align:center;padding:11px;border-radius:8px;
  font-size:14px;font-weight:700;margin-top:8px;border:1px solid transparent;
  font-family:inherit;cursor:pointer}
.pbtn.p{background:var(--gold);color:#fff}
.pbtn.p:hover{background:#77592e}
.pbtn.s{background:#fff;color:var(--gold);border-color:var(--gold-l)}
.pbtn.s:hover{background:#fdf8ef}
.tip{font-size:11.5px;color:#a3907a;line-height:1.85;margin-top:15px;
  border-top:1px dashed var(--line);padding-top:12px}
.tiplink{display:block;margin-top:7px;font-size:11px;color:#b09b7c;
  text-decoration:underline;text-underline-offset:3px}
.tiplink:hover{color:var(--gold)}

/* ---------- 购买说明页 ---------- */
.bwrap{max-width:720px;margin:0 auto}
.bwrap h2{font-size:24px;letter-spacing:.05em;margin-bottom:8px}
.bwrap .lead{font-size:13.5px;color:#6b5f4f;line-height:1.95;margin-bottom:26px}
.step{display:flex;gap:15px;padding:16px 0;border-bottom:1px dotted var(--line)}
.step .k{flex:none;width:27px;height:27px;border-radius:50%;background:var(--gold);
  color:#fff;font-size:13px;font-weight:700;text-align:center;line-height:27px;
  font-family:Georgia,serif}
.step h4{font-size:14.5px;margin-bottom:4px}
.step p{font-size:13px;color:#5c4a35;line-height:1.85}
.box{background:#fff;border:1px solid var(--line);border-radius:10px;
  padding:18px 20px;margin:26px 0}
.box h3{font-size:12px;letter-spacing:.24em;color:var(--gold);margin-bottom:10px}
.box p{font-size:13px;color:#5c4a35;line-height:1.9}
.faq dt{font-size:13.5px;font-weight:700;margin-top:15px;color:#2a2014}
.faq dd{font-size:13px;color:#5c4a35;line-height:1.85;margin-top:3px}

.term{display:flex;gap:13px;padding:17px 0;border-bottom:1px dotted var(--line)}
.term:last-child{border-bottom:none}
.term .tn{flex:none;width:22px;text-align:right;font-family:Georgia,serif;
  font-size:15px;font-weight:700;color:var(--gold);line-height:1.55}
.term h4{font-size:14px;margin-bottom:5px;letter-spacing:.02em}
.term p{font-size:13px;color:#5c4a35;line-height:1.95;text-align:justify}

/* ---------- 手机 ---------- */
@media (max-width:720px){
  .hero{padding:28px 0 20px}
  .hero h1{font-size:23px}
  .stats{gap:18px}.stats b{font-size:19px}
  main{padding:16px 14px 60px}
  .in{padding:0 14px}
  .search{margin:-22px 0 20px}
  .cards{grid-template-columns:1fr 1fr;gap:9px}
  .lc{padding:11px 12px}
  .lc b{font-size:17px}
  .tc{padding:13px 14px;border-radius:8px}
  .tc-h h3{font-size:15.5px}
  .tc-h .meta{margin-left:0;width:100%;gap:12px}
  .its li{font-size:12px}
  .alpha .in{padding:0 8px}
  .alpha a{padding:11px 8px;font-size:12.5px}
  .alpha::after{content:'';position:absolute;right:0;top:0;bottom:0;width:34px;
    background:linear-gradient(90deg,#fffdf800,#fffdf8 72%);pointer-events:none}
  .idx{padding:13px 14px}
  .fab{right:12px;bottom:14px;padding:11px 16px;font-size:13px}
  .buy-s{font-size:11px;padding:3px 8px;letter-spacing:.04em}
  .panel{padding:22px 18px 18px}
  .qr{width:160px;height:160px}
  .bwrap h2{font-size:20px}
}