:root{--blue:#3b6dff;--blue-d:#2a55d8;--ink:#1b2742;--bg:#eef1f8;--card:#fff;--line:#e6eaf2;--mut:#8a93a6;--hot:#ff5a5a;--ok:#2bb673}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased}
.wrap{max-width:1000px;margin:0 auto;padding:0 14px}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:none;color:var(--blue-d)}

/* 头部 */
.site-header{background:linear-gradient(135deg,#16223d,#27407a);color:#fff;position:sticky;top:0;z-index:50;box-shadow:0 2px 12px rgba(0,0,0,.18)}
.nav{max-width:1000px;margin:0 auto;padding:10px 14px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.logo a{color:#fff;font-size:20px;font-weight:800;white-space:nowrap;display:flex;align-items:center;gap:8px}
.logo .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,#5b8bff,#9b6bff);box-shadow:0 0 8px #5b8bff}
.logo span{color:#8fb0ff;font-weight:600;font-size:13px;margin-left:2px}
.nav nav{display:flex;gap:6px;flex:1 1 auto;flex-wrap:wrap;min-width:0}
.nav nav a{padding:6px 12px;border-radius:8px;color:#cdd6ee;font-size:14px;transition:.15s}
.nav nav a:hover{background:rgba(255,255,255,.1);color:#fff}
.nav-acct{display:flex;gap:10px;align-items:center;flex-shrink:0;white-space:nowrap;margin-left:auto}
.nav-acct a{padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600}
.site-link{display:inline-flex;align-items:center;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);color:#fff!important;padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600;white-space:nowrap;transition:.15s}
.site-link:hover{background:#fff;color:#27407a!important}
.nav-acct a:first-child{color:#cdd6ee}
.btn-login{background:rgba(255,255,255,.14);color:#fff!important}
.btn-reg{background:#fff;color:var(--blue)!important}
.nav-user{color:#9fd0ff;font-size:13px;background:rgba(255,255,255,.08);padding:4px 12px;border-radius:16px}

/* hero */
.hero{background:linear-gradient(120deg,#3b6dff,#7a5bff);color:#fff;border-radius:18px;padding:38px 26px;margin:20px 0;text-align:center;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;right:-60px;top:-60px;width:200px;height:200px;background:rgba(255,255,255,.12);border-radius:50%}
.hero:after{content:"";position:absolute;left:-40px;bottom:-50px;width:160px;height:160px;background:rgba(255,255,255,.08);border-radius:50%}
.hero h2{font-size:27px;margin-bottom:8px;position:relative}
.hero p{opacity:.92;margin-bottom:18px;position:relative}
.hero .stats{display:flex;justify-content:center;gap:26px;margin-bottom:20px;position:relative;flex-wrap:wrap}
.hero .stat{text-align:center}
.hero .stat b{display:block;font-size:22px}
.hero .stat span{font-size:12px;opacity:.85}
.cta{display:inline-block;background:#fff;color:var(--blue);padding:12px 30px;border-radius:30px;font-weight:700;cursor:pointer;border:none;font-family:inherit;font-size:15px;transition:.15s;position:relative}
.cta:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.2)}

/* 标题 */
.section-title{font-size:18px;margin:24px 0 12px;padding-left:12px;border-left:4px solid var(--blue);position:relative}
/* 标签云 */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 6px}
.tag-chip{display:inline-block;padding:6px 14px;border:1px solid var(--line);border-radius:20px;background:var(--card);color:var(--ink);font-size:13px;text-decoration:none;transition:.15s}
.tag-chip:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-1px)}
.tag-chip.active{background:var(--blue);color:#fff;border-color:var(--blue)}
.tag-chip.clear{background:#fff3e0;color:#b26a00;border-color:#ffd9a0}
/* 官方群二维码 */
.qr-wrap{text-align:center;padding:6px 0}
.qr-wrap img{width:160px;height:160px;object-fit:cover;border:1px solid var(--line);border-radius:10px;background:#fff}
.qr-text{font-weight:700;margin:10px 0 2px;color:var(--ink)}
.qr-note{font-size:12px;color:var(--mut);line-height:1.5}
.qr-tip{font-size:12px;color:var(--mut);margin-top:8px;line-height:1.5}
/* 列表项标签 */
.t-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.t-tag{font-size:11px;background:#eaf1ff;color:var(--blue);border:1px solid #cdd9ff;padding:1px 8px;border-radius:8px}
.sub-title{font-size:15px;margin:18px 0 8px;color:var(--ink)}

/* 版块 */
.board-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.board-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;display:block;color:inherit;transition:.18s;position:relative;overflow:hidden}
.board-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(var(--blue),#7a5bff);opacity:.85}
.board-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(59,109,255,.14);border-color:#cdd9ff}
.board-card h3{font-size:17px;margin-bottom:6px;color:var(--ink)}
.board-card p{color:var(--mut);font-size:13px;margin-bottom:10px;min-height:38px}
.board-card .cnt{display:inline-block;font-size:12px;color:var(--blue);background:#eef3ff;padding:3px 10px;border-radius:12px;font-weight:600}

/* 帖子列表 */
.t-list{list-style:none;background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.t-item{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line);transition:.12s}
.t-item:last-child{border-bottom:none}
.t-item:hover{background:#f7f9ff}
.t-item a{font-size:15px;font-weight:600;color:var(--ink);flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.t-item a:hover{color:var(--blue)}
.t-badge{font-size:11px;background:#fff0f0;color:var(--hot);border:1px solid #ffd6d6;padding:1px 7px;border-radius:8px;margin-right:4px;font-weight:700}
.t-badge.top{background:#eaf1ff;color:var(--blue);border-color:#cdd9ff}
.t-badge.ess{background:#fff7e6;color:#d98a00;border-color:#ffe1a8}
.avatar{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;color:#fff;font-size:12px;font-weight:700;vertical-align:middle;margin-right:4px}
.t-meta .lv{font-size:11px;color:#d98a00;background:#fff7e6;border:1px solid #ffe1a8;padding:0 6px;border-radius:8px}
.nav-search{display:flex;align-items:center}
.nav-search input{padding:6px 12px;border:1px solid rgba(255,255,255,.25);border-radius:18px;background:rgba(255,255,255,.12);color:#fff;font-size:13px;width:150px;font-family:inherit}
.nav-search input::placeholder{color:#b9c4e0}
.nav-search input:focus{outline:none;background:rgba(255,255,255,.2);border-color:#fff}
.admin-box button.top-thread,.admin-box button.ess-thread{background:#fff;color:var(--blue);border:1px solid #cdd9ff;padding:4px 10px;font-size:12px;font-weight:600}
.admin-box button.del-thread{background:#fff;color:#e25555;border:1px solid #f0c5c5;padding:4px 10px;font-size:12px}
.t-meta{font-size:12px;color:var(--mut);white-space:nowrap;display:flex;gap:8px;align-items:center}
.t-meta .views{color:#9aa3b5}
.empty{color:var(--mut);padding:24px;text-align:center}

/* 详情 */
.thread{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;margin-top:16px}
.thread-title{font-size:23px;margin-bottom:10px;line-height:1.4}
.thread-meta{color:var(--mut);font-size:13px;margin-bottom:16px;padding-bottom:14px;border-bottom:1px solid var(--line);display:flex;gap:14px;flex-wrap:wrap}
.thread-body{font-size:15px;word-break:break-word;line-height:1.8}
.thread-body img{max-width:100%;height:auto;border-radius:8px;margin:8px 0}
.thread-body p{margin:8px 0}
.reply{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-top:12px;background:#fbfcff}
.reply .r-head{display:flex;justify-content:space-between;font-size:13px;color:var(--mut);margin-bottom:8px;align-items:center;gap:8px}
.reply .r-head b{color:var(--ink)}
.reply .op{font-size:11px;background:#eaf1ff;color:var(--blue);border:1px solid #cdd9ff;padding:0 7px;border-radius:8px;font-weight:700}
.home-grid{display:grid;grid-template-columns:1fr 300px;gap:18px;align-items:start}
.home-main{min-width:0}
.aside .box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:16px}
.aside h3{font-size:15px;margin-bottom:10px;padding-left:10px;border-left:3px solid var(--blue)}
.hot-item{display:block;padding:8px 0;border-bottom:1px solid var(--line);font-size:13px;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hot-item:last-child{border-bottom:none}
.hot-item:hover{color:var(--blue)}
.hot-item .n{color:var(--hot);font-weight:700;margin-right:6px}
.rel-box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.reply .r-body{font-size:14px;word-break:break-word;line-height:1.75}
.reply .r-body img{max-width:100%;height:auto;border-radius:8px;margin:8px 0}
.reply.hist{background:#f6f8fa;border-style:dashed}
.reply .hist-tag{font-size:11px;background:#fff3e0;color:#b26a00;border:1px solid #ffd9a0;padding:0 7px;border-radius:8px;font-weight:700}
.hist-sep{margin-top:18px;padding-top:14px;border-top:1px dashed var(--line);font-size:13px;color:var(--mut);text-align:center}

/* 表单 */
.post-form,.auth-form,.reply-form{max-width:680px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;margin-top:14px;display:flex;flex-direction:column;gap:12px}
.post-form input,.post-form select,.post-form textarea,.auth-form input,.reply-form textarea{padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-family:inherit;font-size:14px;width:100%;transition:.15s;background:#fbfcff}
.post-form input:focus,.post-form textarea:focus,.auth-form input:focus,.reply-form textarea:focus{border-color:var(--blue);outline:none;background:#fff;box-shadow:0 0 0 3px rgba(59,109,255,.12)}
.post-form textarea{min-height:220px;resize:vertical;line-height:1.7}
.reply-form{margin-top:18px}
.reply-form textarea{min-height:90px;resize:vertical}
/* 富文本编辑器 */
.ed{border:1px solid var(--line);border-radius:10px;background:#fff;overflow:hidden;margin:4px 0}
.ed-bar{display:flex;flex-wrap:wrap;gap:4px;padding:8px;background:#f4f6fc;border-bottom:1px solid var(--line)}
.ed-btn{background:#fff;border:1px solid #dfe5f2;border-radius:7px;padding:5px 11px;cursor:pointer;font-size:13px;font-weight:600;color:#3a4a6b;font-family:inherit;min-width:34px}
.ed-btn:hover{background:#eaf0ff;border-color:var(--blue)}
.ed-btn[data-cmd="bold"]{font-weight:800}
.ed-btn[data-cmd="italic"]{font-style:italic}
.ed-btn[data-cmd="underline"]{text-decoration:underline}
.ed-area{min-height:200px;padding:14px;font-size:15px;line-height:1.75;outline:none;word-break:break-word}
.ed-area:empty:before{content:attr(data-ph);color:#aab2c4}
.ed-area img{max-width:100%;border-radius:8px;margin:6px 0}
.ed-area p{margin:6px 0}
.reply-form .ed-area{min-height:90px}
.ed-foot{display:flex;justify-content:space-between;align-items:center;margin-top:8px}
.ed-count{font-size:12px;color:var(--mut)}
.emoji-pal{display:none;flex-wrap:wrap;gap:4px;padding:8px;background:#f4f6fc;border-top:1px solid var(--line)}
.emoji-pal span{cursor:pointer;font-size:20px;padding:2px 4px;border-radius:6px}
.emoji-pal span:hover{background:#eaf0ff}
.mention-box{display:none;position:absolute;z-index:20;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 20px rgba(0,0,0,.12);max-height:180px;overflow:auto;min-width:140px}
.mention-box div{padding:8px 12px;cursor:pointer;font-size:14px}
.mention-box div:hover{background:#eaf0ff}
.ed{position:relative}.ed-bar{position:relative;z-index:2}
.board-desc{color:var(--mut);font-size:14px;margin-bottom:12px}

/* 按钮 */
.cta,.post-form button,.auth-form button,.reply-form button,.admin-box button{background:linear-gradient(135deg,var(--blue),#5b7bff);color:#fff;border:none;border-radius:10px;padding:12px 28px;cursor:pointer;font-family:inherit;font-weight:700;font-size:15px;transition:.15s}
.cta:hover,.post-form button:hover,.auth-form button:hover,.reply-form button:hover,.admin-box button:hover{box-shadow:0 8px 20px rgba(59,109,255,.3);transform:translateY(-1px)}

/* 分页 */
.pager{display:flex;gap:8px;margin:18px 0;flex-wrap:wrap}
.pager a{padding:7px 13px;border:1px solid var(--line);border-radius:9px;color:var(--ink);font-size:13px;background:#fff}
.pager a.cur{background:var(--blue);color:#fff;border-color:var(--blue)}

/* 后台 */
.admin-box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin:14px 0}
.admin-box form{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.admin-box input{padding:9px 12px;border:1px solid var(--line);border-radius:9px;font-family:inherit;flex:1;min-width:160px;background:#fbfcff}
.admin-box ul{list-style:none}
.admin-box li{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}

/* 删除按钮 */
.del{background:#fff!important;color:#e25555!important;border:1px solid #f0c5c5!important;border-radius:7px;padding:4px 12px;cursor:pointer;font-size:12px;font-weight:600}
.del:hover{background:#fff5f5!important}

/* 页脚 */
.site-footer{background:linear-gradient(135deg,#16223d,#27407a);color:#cdd6ee;margin-top:46px;padding:34px 0}
.foot-cols{max-width:1000px;margin:0 auto;padding:0 14px;display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:22px}
.foot-cols h4{color:#fff;font-size:15px;margin-bottom:12px}
.foot-cols a,.foot-cols span{display:block;color:#aeb9d6;font-size:13px;margin-bottom:7px}
.foot-cols a:hover{color:#fff}
.copyright{text-align:center;color:#8a93a6;font-size:12px;margin-top:22px}

/* 弹窗 */
.alert-mask{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.45);display:none;align-items:center;justify-content:center;z-index:99999;padding:20px}
.alert-mask.show{display:flex}
.alert-box{background:#fff;border-radius:16px;padding:26px;max-width:330px;width:90%;text-align:center;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.alert-box p{margin-bottom:18px;font-size:15px}
.alert-box button{background:var(--blue);color:#fff;border:none;border-radius:24px;padding:10px 30px;cursor:pointer;font-family:inherit;font-weight:700;font-size:15px}

/* 移动端 */
@media(max-width:860px){
  .home-grid{grid-template-columns:1fr}
  .aside{order:2}
}
@media(max-width:720px){
  .nav{flex-wrap:wrap;align-items:flex-start;gap:8px 12px;padding:10px 0;max-width:100%}
  .nav .logo{order:1;flex:1 1 auto;font-size:18px;min-width:0}
  .nav .nav-acct{order:2;flex:0 0 auto;margin-left:auto}
  .nav nav{order:3;flex:0 0 100%;width:100%;gap:4px;font-size:13px;overflow-x:auto;padding-bottom:4px;-webkit-overflow-scrolling:touch}
  .nav nav a{padding:6px 10px;white-space:nowrap}
  .nav-search{order:4;flex:0 0 100%;width:100%}
  .nav-search input{width:100%}
  .hero{padding:24px 16px}
  .hero h2{font-size:21px}
  .hero .stats{gap:14px}
  .board-grid{grid-template-columns:1fr}
  .thread-title{font-size:19px}
  .t-item{flex-wrap:wrap;gap:6px 12px}
  .t-item a{flex:1 1 100%}
  .t-meta{width:100%;flex-wrap:wrap}
  .home-main .section-title{font-size:17px}
  .aside .box{padding:14px}
}