/* ============================================================
 * BetoFree 共用样式 —— 浅色极简（Claude 风），黑白配
 * ============================================================ */
:root{
  --bg:#faf9f5; --surface:#ffffff; --ink:#1f1e1c; --sub:#6b6a63;
  --border:#e7e4db; --hover:#f2f0e9; --line-strong:#d8d4c8;
}
:root[data-theme="dark"]{
  --bg:#1a1917; --surface:#242320; --ink:#ecebe6; --sub:#9c988e;
  --border:#37342e; --hover:#2a2925; --line-strong:#4c473e;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  -webkit-font-smoothing:antialiased;line-height:1.6}
a{color:inherit}
.serif{font-family:Georgia,"Times New Roman",serif;font-weight:500}

/* ---- 顶部导航 ---- */
.nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  padding:18px 32px;border-bottom:1px solid var(--border);
  background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px)}
.nav .logo{font-weight:600;font-size:16px;letter-spacing:-.02em;text-decoration:none;color:var(--ink)}
.nav .logo b{font-weight:600}
.nav .links{display:flex;gap:26px}
.nav .links a{color:var(--sub);text-decoration:none;font-size:14px;transition:color .15s}
.nav .links a:hover,.nav .links a.on{color:var(--ink)}
.nav .right{display:flex;align-items:center;gap:20px}
.theme-btn{width:34px;height:34px;border-radius:8px;border:1px solid var(--border);background:transparent;
  color:var(--sub);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:.15s;flex-shrink:0}
.theme-btn:hover{color:var(--ink);border-color:var(--line-strong);background:var(--surface)}
.theme-btn svg{width:16px;height:16px}

/* ---- 通用容器 ---- */
.wrap{max-width:960px;margin:0 auto;padding:0 32px}

/* ---- 按钮 ---- */
.btn{display:inline-flex;align-items:center;gap:7px;text-decoration:none;font-size:14px;font-weight:500;
  padding:10px 20px;border-radius:8px;cursor:pointer;font-family:inherit;border:1px solid var(--border);
  color:var(--ink);background:transparent;transition:.15s}
.btn:hover{background:var(--surface);border-color:var(--line-strong)}
.btn.solid{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn.solid:hover{opacity:.85;background:var(--ink)}
.btn svg{width:14px;height:14px;flex-shrink:0}


/* ---- 返回链接（悬浮，适配电脑/手机） ---- */
.back-link{position:fixed;top:78px;z-index:2147483000;
  display:inline-flex;align-items:center;gap:5px;font-size:12.5px;font-weight:500;color:#fff;text-decoration:none;
  padding:7px 13px;border-radius:999px;border:none;transition:.15s;
  background:rgba(25,25,25,.72);backdrop-filter:blur(4px);box-shadow:0 2px 8px rgba(0,0,0,.2)}
.back-link:hover{background:rgba(45,45,45,.85)}
@media (min-width:1024px){
  .back-link{left:calc(50% - 480px + 12px)} /* 与 .wrap 左对齐 */
}
@media (max-width:1023px){
  .back-link{left:12px}
}
/* ---- 页面头部 ---- */
.page-head{padding:56px 0 34px}
.page-head .eyebrow{font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--sub);margin-bottom:14px}
.page-head h1{font-family:Georgia,serif;font-weight:500;font-size:clamp(28px,4vw,38px);letter-spacing:-.02em;line-height:1.25}
.page-head p{color:var(--sub);font-size:15px;margin-top:12px;max-width:560px}

/* ---- 区块标题 ---- */
.sec-head{display:flex;align-items:baseline;justify-content:space-between;
  margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.sec-head .label{font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--sub)}
.sec-head a{font-size:13px;color:var(--sub);text-decoration:none}
.sec-head a:hover{color:var(--ink)}

/* ---- 卡片网格 ---- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}
.card{border:1px solid var(--border);border-radius:12px;padding:22px;text-decoration:none;color:inherit;
  display:flex;flex-direction:column;gap:9px;transition:background .15s,border-color .15s;min-height:150px}
.card:hover{background:var(--surface);border-color:var(--line-strong)}
.card .cat{font-size:11px;font-weight:600;letter-spacing:.03em;color:var(--sub);
  border:1px solid var(--border);border-radius:6px;padding:2px 8px;align-self:flex-start}
.card h3{font-size:15.5px;font-weight:600;letter-spacing:-.01em}
.card p{font-size:13px;color:var(--sub);line-height:1.6;flex:1}
.card .actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:2px}
.card .mini{font-size:12.5px;font-weight:500;padding:6px 12px;border-radius:7px;border:1px solid var(--border);
  text-decoration:none;color:var(--ink);transition:.15s}
.card .mini:hover{background:var(--hover)}
.card .mini.solid{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.card.soon{border-style:dashed;align-items:center;justify-content:center;text-align:center;color:var(--sub)}
.card.soon span{font-size:13px}

/* ---- 空态 ---- */
.empty{color:var(--sub);font-size:14px;padding:40px 0;text-align:center;
  border:1px dashed var(--border);border-radius:12px}

/* ---- 页脚 ---- */
.footer{border-top:1px solid var(--border);margin-top:70px;padding:26px 0;
  display:flex;flex-direction:column;gap:8px;color:var(--sub);font-size:13px}
.footer .row1{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer a{color:var(--sub);text-decoration:none}
.footer a:hover{color:var(--ink)}
.footer .flinks{display:flex;gap:20px}
.footer .icp{font-size:11.5px;color:var(--sub);border-top:1px solid var(--border);padding-top:10px;margin-top:2px;text-align:center}
.footer .icp a{color:var(--sub)}
/* 预留：公安备案加在 .icp 旁，如：<span class="beian"><a href="...">豫公网安备 xxxx号</a></span>
.footer .beian{font-size:11.5px;color:var(--sub)} */


/* ---- 手机端：汉堡菜单 ---- */
.menu-btn{display:none;width:34px;height:34px;border-radius:8px;border:1px solid var(--border);background:transparent;
  color:var(--sub);cursor:pointer;align-items:center;justify-content:center;transition:.15s;flex-shrink:0}
.menu-btn:hover{color:var(--ink);border-color:var(--line-strong);background:var(--surface)}
.menu-btn svg{width:16px;height:16px}
@media (max-width:640px){
  .nav{padding:14px 20px}
  .menu-btn{display:inline-flex}
  .nav .links{display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--bg);border-bottom:1px solid var(--border);
    flex-direction:column;padding:6px 0;gap:0;z-index:30;
    box-shadow:0 8px 20px rgba(0,0,0,.08)}
  .nav .links.open{display:flex}
  .nav .links a{padding:12px 28px;font-size:15px;border-bottom:1px solid var(--border)}
  .nav .links a:last-child{border-bottom:none}
  .wrap{padding:0 20px}
}
@media (max-width:640px){
  .nav{padding:16px 20px}
  .nav .links{gap:18px}
  .wrap{padding:0 20px}
}

/* ---- 反馈页面 ---- */
.fb-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding-bottom:60px}
.fb-panel{border:1px solid var(--border);border-radius:12px;padding:22px;background:var(--surface)}
.fb-panel h3{font-size:15px;font-weight:600;margin-bottom:14px;letter-spacing:-.01em}
.fb-panel label{display:block;font-size:13px;color:var(--sub);margin-bottom:5px;margin-top:14px}
.fb-panel label:first-of-type{margin-top:0}
.fb-panel select,.fb-panel input[type="text"],.fb-panel textarea{width:100%;padding:9px 12px;font-size:13.5px;font-family:inherit;
  border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--ink);
  transition:border-color .15s;resize:vertical}
.fb-panel select:focus,.fb-panel input:focus,.fb-panel textarea:focus{outline:none;border-color:var(--line-strong)}
.fb-panel textarea{min-height:140px;line-height:1.6}
.fb-rule{font-size:12.5px;color:var(--sub);white-space:pre-wrap;line-height:1.7;
  background:var(--bg);border-radius:8px;padding:12px 14px;border:1px solid var(--border)}
.fb-out{font-size:12.5px;color:var(--ink);white-space:pre-wrap;line-height:1.7;
  background:var(--bg);border-radius:8px;padding:12px 14px;border:1px solid var(--border);min-height:120px;max-height:260px;overflow:auto}
.fb-actions{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.fb-tip{font-size:12px;color:var(--sub);margin-top:10px;line-height:1.5}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--hover)}
.mono{font-family:"SF Mono","Cascadia Code","Consolas",monospace;font-size:.92em}

@media (max-width:700px){
  .fb-grid{grid-template-columns:1fr}
  .fb-panel{padding:18px}
}