/* Karhow Blog v5：浅蓝→白渐变 + 干净留白 */
:root{
  --bg1:#e9f1ff; --bg2:#f7faff;
  --card:#ffffff; --soft:#f4f7fd; --line:#e6ecf8;
  --ink:#0f172a; --mut:#6b7793;
  --brand:#2f6bff; --brand-2:#5b8cff; --brand-soft:#eff5ff; --brand-line:#dbe7ff;
  --brand-ink:#ffffff;
  --ok:#12b76a; --warn:#d97706;
  --radius:18px; --sp:20px;
  --shadow:0 8px 26px rgba(23,52,116,.07);
  --shadow-lg:0 24px 60px rgba(15,23,42,.22);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:linear-gradient(180deg,var(--bg1) 0%,var(--bg2) 46%,#fff 78%) no-repeat;
  background-attachment:fixed;
  color:var(--ink); min-height:100vh;
  font:15px/1.65 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
}
body.modal-open{overflow:hidden}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.page{max-width:1000px;margin:0 auto;padding:26px 20px 60px}

/* ---------- 顶部导航 ---------- */
.nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.84);
  backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px);
  border-bottom:1px solid var(--line)}
.nav-inner{max-width:1000px;margin:0 auto;padding:11px 20px;display:flex;align-items:center;gap:22px}
.logo{display:inline-flex;align-items:center;gap:7px;font-size:18px;font-weight:750;
  letter-spacing:-.015em;color:var(--ink);white-space:nowrap}
.logo em{font-style:normal;color:var(--brand)}
.logo-mark{font-size:18px;line-height:1}
.navlinks{display:flex;gap:6px;align-items:center}
.navlinks a{color:var(--mut);font-size:14px;font-weight:500;padding:6px 11px;border-radius:9px}
.navlinks a:hover{background:var(--brand-soft);color:var(--brand);text-decoration:none}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px;position:relative}

.btn-login{background:var(--brand);color:var(--brand-ink);border:0;border-radius:999px;
  padding:9px 18px;font-size:13.5px;font-weight:600;cursor:pointer;white-space:nowrap}
.btn-login:hover{filter:brightness(1.07)}

.usermenu{position:relative}
.user-btn{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:4px 12px 4px 4px;cursor:pointer;color:var(--ink);
  font-size:13.5px;font-weight:600;font-family:inherit}
.user-btn:hover{border-color:var(--brand-line)}
.caret{color:var(--mut);font-size:11px}
.dropdown{position:absolute;right:0;top:calc(100% + 9px);min-width:178px;background:#fff;
  border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);padding:6px;
  display:flex;flex-direction:column;z-index:40}
.dropdown .mail{margin:2px 0 4px;padding:7px 12px 3px;font-size:11.5px;color:var(--mut);
  border-bottom:1px solid var(--line);word-break:break-all}
.dropdown button{background:transparent;border:0;color:var(--ink);text-align:left;
  font-family:inherit;font-size:14px;font-weight:500;border-radius:10px;padding:9px 12px;cursor:pointer}
.dropdown button:hover{background:var(--brand-soft);color:var(--brand)}

/* ---------- 公告 ---------- */
.notice{display:flex;align-items:flex-start;gap:11px;background:#fff;border:1px solid var(--brand-line);
  border-radius:15px;padding:13px 16px;margin:14px 0 30px;box-shadow:var(--shadow)}
.notice-tag{flex:0 0 auto;background:var(--brand);color:#fff;border-radius:7px;padding:2px 9px;
  font-size:11.5px;font-weight:600;letter-spacing:.04em;margin-top:1px}
.notice-txt{margin:0;font-size:13.5px;color:#3a4661}

/* ---------- 首屏 ---------- */
.hero{text-align:center;padding:16px 0 8px}
.hero-title{
  margin:0;font-size:clamp(19px,2.7vw,30px);font-weight:750;letter-spacing:-.018em;
  line-height:1.32;color:#12245c;
  background:linear-gradient(175deg,#12245c 12%,#2f6bff 88%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.askbox{max-width:720px;margin:20px auto 0;background:#fff;border:1px solid var(--line);
  border-radius:22px;padding:14px 16px 12px;box-shadow:0 12px 34px rgba(23,52,116,.09);
  text-align:left;transition:border-color .18s,box-shadow .18s}
.askbox:focus-within{border-color:var(--brand-line);box-shadow:0 14px 40px rgba(47,107,255,.16)}
.askbox textarea{width:100%;border:0;background:transparent;color:var(--ink);outline:none;
  resize:none;font-family:inherit;font-size:16px;line-height:1.6;padding:4px 2px;min-height:60px}
.askbox textarea::placeholder{color:#9aa5bd}
.askbox-foot{display:flex;align-items:center;gap:8px;margin-top:8px}
.pill{border:1px solid var(--brand-line);background:var(--brand-soft);color:var(--brand);
  border-radius:999px;padding:6px 13px;font-family:inherit;font-size:12.5px;font-weight:500;
  cursor:pointer;white-space:nowrap}
.pill:hover{background:#e4efff}
.send-btn{margin-left:auto;width:40px;height:40px;flex:0 0 auto;border:0;border-radius:50%;
  background:linear-gradient(180deg,#4c86ff,#2f6bff);color:#fff;font-size:19px;font-weight:700;
  line-height:1;cursor:pointer;box-shadow:0 5px 14px rgba(47,107,255,.34)}
.send-btn:hover{filter:brightness(1.07)}
.send-btn:disabled{opacity:.5;cursor:default}
.hero-note{margin:12px 0 0;font-size:12.5px;color:var(--mut)}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:24px}
.cta{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:12px 20px;font-family:inherit;font-size:14px;font-weight:600;
  color:var(--ink);cursor:pointer;box-shadow:var(--shadow)}
.cta:hover{border-color:var(--brand-line);color:var(--brand)}
.cta span{font-size:16px;line-height:1}

/* ---------- 卡片 ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:var(--sp);margin:26px 0;box-shadow:var(--shadow)}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}
.card-head h2{font-size:15px;font-weight:650;margin:0;letter-spacing:.02em}
.badge{font-size:12px;color:var(--mut);background:var(--soft);border-radius:999px;padding:2px 10px;white-space:nowrap}
.note{color:var(--mut);font-size:12px;margin:8px 0 0}
.hint{color:var(--mut);font-size:13px;margin:8px 0}
.about-p{margin:10px 0 0;font-size:14px;color:#3a4661}

/* ---------- 表单 ---------- */
input,textarea,button{font-family:inherit;font-size:14.5px}
input,textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:12px;
  background:var(--soft);color:var(--ink);outline:none}
input:focus,textarea:focus{border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 3px rgba(47,107,255,.13)}
textarea{resize:vertical;min-height:76px}
button{border:0;border-radius:12px;padding:10px 18px;cursor:pointer;font-weight:600;
  background:var(--brand);color:var(--brand-ink)}
button:hover{filter:brightness(1.06)}
button:disabled{opacity:.5;cursor:default}
.stack{display:flex;flex-direction:column;gap:10px}
.stack button[type=submit]{width:100%;padding:12px;font-size:15px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:6px}

/* ---------- 聊天 ---------- */
.chat{height:380px;overflow:auto;padding:6px 2px 2px;scroll-behavior:smooth}
.msg{display:flex;gap:10px;margin-bottom:14px;align-items:flex-start}
.msg .av{flex:0 0 30px;width:30px;height:30px;border-radius:10px;display:grid;
  place-items:center;font-size:16px;background:var(--soft);color:var(--mut);overflow:hidden;line-height:1}
.msg .av img{width:100%;height:100%;object-fit:cover;display:block}
.msg .bd{max-width:78%}
.msg .who{font-size:11.5px;color:var(--mut);margin-bottom:3px}
.msg .txt{padding:10px 14px;border-radius:14px;background:var(--soft);
  white-space:pre-wrap;word-break:break-word}
.msg.me{flex-direction:row-reverse}
.msg.me .bd{text-align:right}
.msg.me .txt{background:var(--brand);color:var(--brand-ink);display:inline-block;text-align:left}
.msg.me .av{background:var(--brand-soft);color:var(--brand)}
.dots::after{content:"···";letter-spacing:2px}

/* ---------- 留言墙 ---------- */
.wall{margin-top:16px}
.item{padding:12px 0;border-top:1px solid var(--line)}
.item:first-child{border-top:0}
.item .hd{display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.item .nm{font-weight:650;font-size:13.5px}
.item .tm{font-size:12px;color:var(--mut);white-space:nowrap}
.item .tx{margin-top:5px;white-space:pre-wrap;word-break:break-word}
.item .meta{font-size:11.5px;color:var(--mut);margin-top:5px}

/* 留言下的评论 */
.cmts{margin-top:9px}
.cmt-list{padding-left:10px;border-left:2px solid var(--brand-line)}
.cmt{display:flex;gap:6px;align-items:baseline;font-size:12.5px;color:#3a4661;
  padding:3px 0;flex-wrap:wrap}
.cmt .cnm{font-weight:650;color:var(--brand);white-space:nowrap}
.cmt .ctx{flex:1 1 auto;word-break:break-word;white-space:pre-wrap}
.cmt .ctm{font-size:11px;color:var(--mut);white-space:nowrap}
.cbar{display:flex;align-items:center;gap:8px;margin-top:7px}
.ccnt{font-size:11.5px;color:var(--mut)}
.cbtn{background:transparent;border:0;color:var(--brand);font-family:inherit;font-size:12.5px;
  font-weight:600;cursor:pointer;padding:2px 0}
.cbtn:hover{text-decoration:underline}
.cmtform{display:flex;gap:8px;margin-top:7px}
.cmtform input{flex:1 1 auto;border:1px solid var(--line);border-radius:11px;background:#fff;
  color:var(--ink);font-family:inherit;font-size:13px;padding:8px 11px;outline:none}
.cmtform input:focus{border-color:var(--brand-line);box-shadow:0 0 0 3px var(--brand-soft)}
.cmtform button{flex:0 0 auto;border:0;border-radius:11px;background:var(--brand);
  color:var(--brand-ink);font-family:inherit;font-size:13px;font-weight:600;padding:0 15px;
  cursor:pointer}
.cmtform button:disabled{opacity:.55;cursor:default}
.more{display:block;margin:14px auto 2px;background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:9px 20px;font-family:inherit;font-size:13px;font-weight:600;
  color:var(--ink);cursor:pointer;box-shadow:var(--shadow)}
.more:hover{border-color:var(--brand-line);color:var(--brand)}

/* ---------- 来访 ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(112px,1fr));gap:10px;margin:14px 0 16px}
.stat{background:var(--soft);border-radius:12px;padding:11px 13px}
.stat b{display:block;font-size:19px;font-weight:650}
.stat span{font-size:12px;color:var(--mut)}
.tbl{width:100%;border-collapse:collapse;font-size:13px}
.tbl th,.tbl td{padding:8px 10px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{color:var(--mut);font-weight:500;font-size:12px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px}
.scroll{max-height:520px;overflow:auto}
footer{color:var(--mut);font-size:12.5px;text-align:center;margin-top:30px}

/* ---------- 头像 ---------- */
.avatar{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;
  background:var(--soft);font-size:17px;overflow:hidden;flex:0 0 auto;line-height:1}
.avatar.sm{width:28px;height:28px;font-size:15px}
.avatar img{width:100%;height:100%;object-fit:cover;display:block}
.emoji-pick{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.emoji-pick button.emoji{background:#fff;border:1px solid var(--line);font-size:22px;
  padding:6px 10px;border-radius:12px;line-height:1;cursor:pointer}
.emoji-pick button.emoji.on{border-color:var(--brand);background:var(--brand-soft)}

/* ---------- 弹窗 ---------- */
.modal{position:fixed;inset:0;z-index:60;display:flex;align-items:center;justify-content:center;padding:18px}
.modal-mask{position:absolute;inset:0;background:rgba(15,23,42,.42);
  backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px)}
.modal-card{position:relative;z-index:1;width:min(420px,100%);max-height:88vh;overflow:auto;
  background:#fff;border-radius:20px;padding:24px;box-shadow:var(--shadow-lg)}
.modal-x{position:absolute;top:9px;right:11px;background:transparent;border:0;color:var(--mut);
  font-size:23px;line-height:1;padding:4px 9px;cursor:pointer;font-weight:400}
.modal-x:hover{color:var(--ink)}
.modal-title{margin:0 0 15px;font-size:19px;font-weight:700;letter-spacing:-.01em}
.tabs{display:flex;gap:5px;background:var(--soft);border-radius:13px;padding:4px;margin:0 0 16px}
.tabs button{flex:1;background:transparent;color:var(--mut);border:0;border-radius:10px;
  padding:9px 0;font-size:14px;font-weight:600;cursor:pointer}
.tabs button.on{background:#fff;color:var(--brand);box-shadow:0 1px 4px rgba(15,23,42,.08)}
.warnbox{color:var(--warn);border:1px solid var(--warn);border-radius:11px;padding:9px 12px;font-size:13px}

/* ---------- 响应式 ---------- */
@media (max-width:720px){
  .navlinks{display:none}
  .nav-inner{gap:12px}
  .page{padding:14px 14px 44px}
  .hero{padding:6px 0}
  .askbox{border-radius:19px;padding:12px 13px 10px}
  .pill{padding:6px 10px;font-size:11.5px}
  .chat{height:300px}
  .card{padding:16px;margin:18px 0}
  .cta{padding:11px 16px;font-size:13px}
  .modal-card{padding:20px}
}

/* 输入框搬进对话卡片后（微信式：上面对话框、下面输入框） */
#chatform.in-chat{margin:12px 0 0;box-shadow:none;background:var(--soft);
  border-radius:16px;padding:10px 12px 8px}
#chatform.in-chat textarea{min-height:44px;font-size:15px;padding:4px 2px}
#chatform.in-chat .askbox-foot{margin-top:2px}

/* 关键修复：作者样式里的 display:flex/grid 会盖掉浏览器默认的 [hidden]{display:none}，
   #userMenu / 弹窗 / #chatCard 等都会藏不住。这条必须放最后。 */
[hidden]{display:none !important}