/* FeedLite · 轻反馈 —— 简洁、克制的基础视觉基调 */
:root{
  --fg:#1f2329; --muted:#6b7280; --line:#e5e7eb; --line-strong:#d7dbe0;
  --bg:#f5f6f8; --card:#ffffff; --brand:#0057B8; --brand-600:#004a9e; --brand-soft:#e8f0f9;
  /* 顶栏品牌图标：与官网首页同一枚应用图标（内联，离线预览也能显示） */
  --icon-mark:url("data:image/png;base64,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");
  --ok:#0f9d58; --ok-soft:#e9f7ef; --warn:#b7791f; --warn-soft:#fff8e6;
  --danger:#d93025; --danger-soft:#fdecea; --shadow:0 1px 3px rgba(16,24,40,.06);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"HarmonyOS Sans SC","HarmonyOS Sans","PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
  font-size:15.5px; line-height:1.75; letter-spacing:.01em;
}
.wrap{max-width:880px; margin:0 auto; padding:0 16px}
a{color:var(--brand); text-decoration:none}
a:hover{text-decoration:underline}
h1{font-size:23px; margin:0 0 8px; font-weight:700}
h2{font-size:17px; margin:0 0 12px; font-weight:700}
p{margin:8px 0}
.muted{color:var(--muted)}
.small{font-size:13px}
.dot{color:var(--line-strong); padding:0 2px}

/* ---------- 顶栏（与官网首页同一套导航样式） / 页脚 ---------- */
.topbar{
  position:sticky; top:0; z-index:20;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar .wrap{display:flex; align-items:center; gap:14px; height:64px}
.topbar .brand-mini{display:flex; align-items:center; gap:10px; font-weight:700; font-size:17px; color:var(--fg); min-width:0}
.topbar .brand-mini:hover{text-decoration:none; color:var(--fg)}
.topbar .brand-text{overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.topbar .logo-mark{
  width:30px; height:30px; flex:none; display:block; border-radius:8px;
  background-image:var(--icon-mark); background-size:cover; background-position:center;
  box-shadow:var(--shadow);
}
.topbar .spacer{flex:1}
.topbar .navlink{color:var(--muted); font-size:14.5px; padding:8px 10px; border-radius:8px; white-space:nowrap}
.topbar .navlink:hover{color:var(--brand); background:var(--brand-soft); text-decoration:none}
.topbar .btn-mini{
  flex:none; font-size:14.5px; font-weight:600; color:#fff; background:var(--brand);
  padding:9px 18px; border-radius:999px; white-space:nowrap;
  box-shadow:0 4px 14px -4px rgba(0,87,184,.55);
}
.topbar .btn-mini:hover{background:var(--brand-600); color:#fff; text-decoration:none}
.hide-sm{display:inline-block}
@media (max-width:640px){
  .hide-sm{display:none}
  .topbar .wrap{gap:10px}
  .topbar .brand-mini{font-size:15.5px; gap:9px}
  .topbar .logo-mark{width:28px; height:28px}
}
main.wrap{padding-top:24px; padding-bottom:40px; min-height:60vh}
.foot{border-top:1px solid var(--line); background:var(--card); padding:22px 0 34px; margin-top:40px}
.foot p{margin:4px 0; text-align:center; font-size:13px; color:var(--muted)}
.foot a{color:var(--muted); text-decoration:underline}
/* 版权句 + 管理后台入口：同一行居中，窄屏自动换行 */
.foot-line{display:flex; flex-wrap:wrap; align-items:center; justify-content:center; gap:0 6px}
.foot-line .dot{padding:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-block; border:1px solid var(--line-strong); background:var(--card);
  color:var(--fg); border-radius:9px; padding:8px 16px; font-size:14.5px;
  cursor:pointer; line-height:1.4; font-family:inherit;
}
.btn:hover{border-color:var(--brand); color:var(--brand); text-decoration:none}
.btn.primary{background:var(--brand); border-color:var(--brand); color:#fff; font-weight:600}
.btn.primary:hover{background:var(--brand-600); color:#fff}

/* ---------- 页头 ---------- */
.page-head{display:flex; align-items:flex-start; gap:16px; margin:6px 0 18px}
.page-head .btn{margin-left:auto; flex:none; margin-top:4px}
.page-head h1{margin-bottom:4px}
.page-head .muted{font-size:14px; margin:0}

/* ---------- 筛选 ---------- */
.filters{margin-bottom:16px}
.chips{display:flex; flex-wrap:wrap; gap:8px; margin-bottom:12px}
.chip{
  padding:5px 13px; border-radius:999px; background:var(--card);
  border:1px solid var(--line); font-size:13.5px; color:var(--fg);
}
.chip:hover{border-color:var(--brand); color:var(--brand); text-decoration:none}
.chip.on{background:var(--brand); border-color:var(--brand); color:#fff; font-weight:600}
.filter-row{display:flex; flex-wrap:wrap; gap:8px}
.filter-row select,.filter-row input[type=search]{
  border:1px solid var(--line-strong); border-radius:9px; padding:8px 10px;
  font-size:14px; background:var(--card); color:var(--fg); font-family:inherit;
}
.filter-row input[type=search]{flex:1; min-width:160px}

/* ---------- 列表 ---------- */
.list{display:flex; flex-direction:column; gap:12px}
.item{
  display:block; background:var(--card); border:1px solid var(--line);
  border-radius:13px; padding:15px 17px; box-shadow:var(--shadow); color:inherit;
}
.item:hover{border-color:var(--brand); text-decoration:none; box-shadow:0 3px 12px rgba(0,87,184,.10)}
.item-top{display:flex; align-items:center; flex-wrap:wrap; gap:8px}
.item-title{font-weight:600; font-size:16px; flex:1; min-width:160px}
.item-ex{color:var(--muted); font-size:14px; margin:8px 0 8px; word-break:break-word}
.item-meta{display:flex; flex-wrap:wrap; align-items:center; gap:6px; font-size:13px; color:var(--muted)}
.item-meta .who{color:#3a424d; font-weight:600}
/* 问题编号：便于按 id 逐条跟进与引用 */
.item-id{
  flex:none; font-size:12.5px; font-weight:600; color:var(--muted);
  font-variant-numeric:tabular-nums; letter-spacing:.02em;
  border:1px solid var(--line); border-radius:6px; padding:0 7px; line-height:1.9;
}

/* ---------- 徽标 ---------- */
.badge{
  display:inline-block; font-size:12px; line-height:1.6; padding:1px 9px;
  border-radius:999px; background:var(--brand-soft); color:var(--brand);
  font-weight:600; white-space:nowrap;
}
.badge.st{background:#f1f3f5; color:#5b636e}
.badge.st-open{background:var(--warn-soft); color:var(--warn)}
.badge.st-doing{background:var(--brand-soft); color:var(--brand)}
.badge.st-resolved{background:var(--ok-soft); color:var(--ok)}
.badge.st-closed{background:#f1f3f5; color:#8a929c}
.badge.official{background:var(--brand); color:#fff}

/* ---------- 分页 ---------- */
.pager{display:flex; align-items:center; gap:12px; margin:22px 0 0; justify-content:center}
.pager-info{font-size:13.5px; color:var(--muted)}

/* ---------- 空态 ---------- */
.empty{
  background:var(--card); border:1px dashed var(--line-strong); border-radius:13px;
  padding:34px 20px; text-align:center; color:var(--muted);
}
.empty.small{padding:20px}

/* ---------- 面包屑 ---------- */
.crumbs{margin:4px 0 14px; font-size:14px}

/* ---------- 主题 / 回复 ---------- */
.subject{background:var(--card); border:1px solid var(--line); border-radius:14px; padding:20px 22px; box-shadow:var(--shadow)}
.subject-title{font-size:21px; margin:0; flex:1; min-width:200px}
.subject-body{margin-top:14px; white-space:normal; word-break:break-word; line-height:1.85}
.subject-body br{content:""}

.replies{margin-top:22px}
.reply{
  background:var(--card); border:1px solid var(--line); border-left:3px solid var(--line-strong);
  border-radius:11px; padding:13px 16px; margin-bottom:11px;
}
.reply.admin{border-left-color:var(--brand); background:linear-gradient(180deg,var(--brand-soft),var(--card) 42%)}
.reply-head{display:flex; align-items:center; gap:8px; font-size:13px; color:var(--muted); margin-bottom:6px}
.reply-head .who{font-weight:600; color:#3a424d; font-size:14px}
.reply-body{word-break:break-word; line-height:1.8}

/* ---------- 表单 ---------- */
.narrow{max-width:640px}
.card-form{background:var(--card); border:1px solid var(--line); border-radius:14px; padding:20px 22px; box-shadow:var(--shadow); margin-top:14px}
.field{display:block; margin-bottom:16px}
.field > span{display:block; font-size:14px; font-weight:600; margin-bottom:6px}
.field .req{color:var(--danger)}
.field .hint{font-style:normal; font-weight:400; font-size:12.5px; color:var(--muted); margin-left:6px}
.field input[type=text],.field input[type=email],.field input[type=tel],
.field input[type=password],.field textarea,.field select{
  width:100%; border:1px solid var(--line-strong); border-radius:9px;
  padding:9px 12px; font-size:15px; font-family:inherit; background:var(--card);
  color:var(--fg); line-height:1.6;
}
.field textarea{resize:vertical; min-height:110px}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none; border-color:var(--brand); box-shadow:0 0 0 3px var(--brand-soft);
}
.row2{display:grid; grid-template-columns:1fr 1fr; gap:14px}
@media (max-width:560px){ .row2{grid-template-columns:1fr} }

.captcha{margin:18px 0 0; padding:14px 16px; background:#fafbfc; border:1px solid var(--line); border-radius:11px}
.captcha .field{margin-bottom:0}
.captcha-line{display:flex; align-items:center; gap:10px; flex-wrap:wrap}
.captcha-line .c-q{
  flex:1; min-width:200px; font-weight:600; color:var(--brand);
  background:var(--brand-soft); border-radius:8px; padding:8px 12px;
}
.captcha-line input{flex:none; width:110px}
.captcha-line .reload{font-size:13.5px; white-space:nowrap}

.form-actions{margin-top:20px}
.form-actions .btn{padding:10px 26px; font-size:15px}
.admin-pw{margin-top:6px}
.admin-status{margin-bottom:16px}

/* 蜜罐字段：对用户不可见，但保留在 DOM 中诱捕机器人 */
.hp-field{position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden}

/* ---------- 提示条 ---------- */
.flash{border-radius:10px; padding:11px 15px; font-size:14px; margin:0 0 16px}
.flash.error{background:var(--danger-soft); border:1px solid #f6c6c1; color:#9c2b21}
.flash.ok{background:var(--ok-soft); border:1px solid #bfe5cd; color:#0b6b3d}

/* ---------- 附件上传（浏览器直传 OSS） ---------- */
.uploader-box{
  margin:18px 0 0; padding:14px 16px; background:#fafbfc;
  border:1px solid var(--line); border-radius:11px;
}
.uploader{border-radius:10px; transition:background .15s, box-shadow .15s}
.uploader + .uploader{margin-top:14px; padding-top:14px; border-top:1px dashed var(--line)}
.uploader.dragging{background:var(--brand-soft); box-shadow:0 0 0 2px var(--brand) inset}
.up-head{display:flex; align-items:center; gap:10px; flex-wrap:wrap}
.up-title{font-size:14px; font-weight:600}
.up-head .btn{margin-left:auto; padding:6px 14px; font-size:13.5px; flex:none}
.up-file{display:none}
.up-list{display:flex; flex-wrap:wrap; gap:9px; margin-top:10px}
.up-list:empty{display:none}
.up-item{
  position:relative; display:flex; gap:10px; align-items:center; width:100%;
  padding:8px 10px; border:1px solid var(--line); border-radius:10px; background:var(--card);
}
.up-thumb{
  width:52px; height:52px; flex:none; border-radius:8px; overflow:hidden; background:#eef1f4;
  display:flex; align-items:center; justify-content:center;
}
.up-thumb img{width:100%; height:100%; object-fit:cover; display:block}
.up-thumb-video{font-size:10px; font-weight:700; color:var(--muted); letter-spacing:.08em}
.up-info{flex:1; min-width:0}
.up-name{font-size:13.5px; font-weight:600; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.up-state{font-size:12.5px; color:var(--muted); word-break:break-word}
.up-bar{height:4px; border-radius:2px; background:#e6eaee; overflow:hidden; margin-top:5px}
.up-bar i{display:block; height:100%; width:0; background:var(--brand); transition:width .2s}
.up-item.done .up-bar{display:none}
.up-item.fail{border-color:#f6c6c1; background:var(--danger-soft)}
.up-item.fail .up-state{color:var(--danger)}
.up-del{
  flex:none; border:1px solid var(--line-strong); background:var(--card); color:var(--muted);
  border-radius:7px; padding:5px 10px; font-size:12.5px; cursor:pointer; font-family:inherit;
}
.up-del:hover{border-color:var(--danger); color:var(--danger)}
.up-del:disabled{opacity:.45; cursor:default}

/* ---------- 附件展示 ---------- */
/* align-items:flex-start —— 否则同行里有视频（多了标题栏）时，图片盒子会被拉伸，底部留白 */
.atts{display:flex; flex-wrap:wrap; align-items:flex-start; gap:10px; margin-top:14px}
.atts .att{
  margin:0; max-width:100%; border:1px solid var(--line); border-radius:11px;
  overflow:hidden; background:var(--card);
}
.atts .att-image img{display:block; width:220px; height:auto; max-height:200px; object-fit:cover}
.atts.compact .att-image img{width:150px; max-height:140px}
.atts .att-video{flex:1 1 320px; max-width:440px}
.atts .att-video video{display:block; width:100%; max-height:330px; background:#000}
.att-video-ph{
  width:360px; max-width:100%; height:200px; background:#11161c; color:#8b97a5;
  display:flex; align-items:center; justify-content:center; font-size:13px;
}
.atts figcaption{
  display:flex; gap:8px; align-items:center; padding:6px 9px; font-size:12px; color:var(--muted);
}
.atts .att-name{overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.atts .att-size{margin-left:auto; flex:none}
.thumbs{display:flex; gap:8px; margin:0 0 8px}
.thumbs img{
  width:78px; height:78px; object-fit:cover; display:block;
  border-radius:9px; border:1px solid var(--line);
}
.att-tag{color:var(--brand); font-weight:600}

/* ---------- 附件灯箱（点击放大 + 左右切换） ---------- */
.atts .att-image .att-lb{display:block; line-height:0; cursor:zoom-in}
.atts .att-image .att-lb:focus-visible{outline:2px solid var(--brand); outline-offset:2px}
.att-zoom{
  flex:none; border:1px solid var(--line-strong); background:var(--card); color:var(--muted);
  border-radius:6px; padding:2px 9px; font-size:12px; line-height:1.6; cursor:pointer; font-family:inherit;
}
.att-zoom:hover{border-color:var(--brand); color:var(--brand)}

html.lb-open,body.lb-open{overflow:hidden}
.lb{
  position:fixed; inset:0; z-index:1000; background:rgba(12,14,17,.94);
  display:flex; flex-direction:column; animation:lb-in .16s ease-out;
}
.lb[hidden]{display:none}
@keyframes lb-in{from{opacity:0} to{opacity:1}}
.lb-stage{flex:1; min-height:0; position:relative}
.lb-media{
  position:absolute; inset:0; z-index:1; padding:48px 62px;
  display:flex; align-items:center; justify-content:center;
}
.lb-media img,.lb-media video{
  display:block; max-width:100%; max-height:100%; border-radius:6px;
  box-shadow:0 10px 44px rgba(0,0,0,.55);
}
.lb-media video{background:#000; width:auto}
.lb-media.loading::after{
  content:''; position:absolute; width:26px; height:26px; border-radius:50%;
  border:3px solid rgba(255,255,255,.26); border-top-color:#fff;
  animation:lb-spin .8s linear infinite;
}
@keyframes lb-spin{to{transform:rotate(360deg)}}
.lb-nav{
  position:absolute; top:50%; transform:translateY(-50%); z-index:2;
  width:46px; height:46px; padding:0 0 3px; border:0; border-radius:50%; cursor:pointer;
  background:rgba(255,255,255,.14); color:#fff; font-size:26px; line-height:1;
  display:flex; align-items:center; justify-content:center; font-family:inherit;
}
.lb-nav:hover{background:rgba(255,255,255,.32)}
.lb-nav[hidden]{display:none}
.lb-prev{left:14px}
.lb-next{right:14px}
.lb-x{
  position:absolute; top:14px; right:14px; z-index:3;
  width:40px; height:40px; border:0; border-radius:50%; cursor:pointer;
  background:rgba(255,255,255,.14); color:#fff; font-size:17px; font-family:inherit;
}
.lb-x:hover{background:rgba(255,255,255,.32)}
.lb-bar{
  flex:none; display:flex; align-items:center; gap:10px; flex-wrap:wrap;
  padding:10px 18px 16px; color:#e9edf2; font-size:13.5px;
}
.lb-name{font-weight:600; max-width:58vw; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.lb-meta{color:#9aa4b0; white-space:nowrap}
.lb-orig{margin-left:auto; color:#9ec5ff; white-space:nowrap}
.lb-orig[hidden]{display:none}
@media (max-width:560px){
  .lb-media{padding:40px 10px}
  .lb-nav{width:38px; height:38px; font-size:22px}
  .lb-prev{left:6px} .lb-next{right:6px}
  .lb-name{max-width:44vw}
}

/* ---------- 深色模式 ---------- */
@media (prefers-color-scheme: dark){
  :root{
    --fg:#e6e8eb; --muted:#9aa2ad; --line:#2c3138; --line-strong:#3a4149;
    --bg:#15181c; --card:#1c2024; --brand:#5aa2ff; --brand-soft:#1e2a3d;
    --ok:#4ec98a; --ok-soft:#16301f; --warn:#e2b559; --warn-soft:#2a2517;
    --danger:#ff8a80; --danger-soft:#33191a; --shadow:0 1px 3px rgba(0,0,0,.35);
  }
  .item-meta .who,.reply-head .who{color:#cfd4da}
  .field > span{color:#e6e8eb}
  .captcha{background:#21262b}
  .uploader-box{background:#21262b}
  .up-thumb{background:#2c3138}
  .up-bar{background:#2c3138}
  .up-item.fail{border-color:#5a2a2a}
  .badge.st{background:#242a30; color:#a8b0ba}
  .badge.st-closed{background:#242a30; color:#8a929c}
  .topbar{background:rgba(21,24,28,.82)}
  .topbar .navlink:hover{background:var(--brand-soft)}
  .btn:hover{border-color:var(--brand)}
  .reply.admin{background:linear-gradient(180deg,var(--brand-soft),var(--card) 42%)}
  .flash.error{background:var(--danger-soft); border-color:#5a2a2a; color:#ffb4ab}
  .flash.ok{background:var(--ok-soft); border-color:#26503a; color:#9fe3bd}
}

/* ---- 管理后台 ---- */
.tabs{display:flex; flex-wrap:wrap; gap:8px; margin:16px 0 4px; border-bottom:1px solid var(--line); padding-bottom:10px}
.tab{padding:7px 14px; border-radius:999px; font-size:14px; color:var(--muted); background:var(--card); border:1px solid var(--line)}
.tab:hover{color:var(--brand); border-color:var(--brand)}
.tab.on{background:var(--brand); border-color:var(--brand); color:#fff}
.grid2{display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:12px 16px; margin:12px 0}
.grid2 .field{margin:0}
.check{display:flex; align-items:center; gap:8px; font-size:14px; color:var(--muted); margin:8px 0}
.check input{width:16px; height:16px}
.btn.danger{border-color:#e08b84; color:#c0392b}
.btn.danger:hover{background:#fdecea}
.filters{display:flex; flex-wrap:wrap; gap:8px; margin:18px 0 4px}
.filters input[type=text]{flex:1 1 220px; min-width:180px}
.filters select{max-width:160px}
@media (max-width:640px){
  .grid2{grid-template-columns:1fr}
  .filters input[type=text],.filters select{width:100%; max-width:none}
}