:root{
  --main:#1f7a5a;
  --main-dk:#155e45;
  --main-lt:#e6f3ee;
  --gold:#d9a441;
  --ink:#1e2a26;
  --sub:#5c6b64;
  --line:#d9e4de;
  --bg:#f2f5f3;
  --white:#ffffff;
  --hot:#d64545;
  --maxw:1240px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
  font-size:14px;
  line-height:1.7;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;height:auto}
ul,ol{list-style:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

.topbar{background:#20302a;color:#9db3aa;font-size:12px;border-bottom:1px solid #2c4038}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:36px}
.topbar a{color:#9db3aa}
.topbar a:hover{color:#fff}
.topbar .tb-l{display:flex;gap:18px}
.topbar .tb-r{display:flex;gap:18px}

.site-head{background:var(--white);border-bottom:1px solid var(--line)}
.head-main .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:88px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:46px;height:46px;background:linear-gradient(135deg,var(--main),var(--gold));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:700;border-radius:50% 12px 50% 12px;
}
.brand-txt b{display:block;font-size:22px;letter-spacing:2px;color:var(--main)}
.brand-txt span{display:block;font-size:11px;color:var(--sub);letter-spacing:3px}
.search{display:flex;flex:1;max-width:460px;margin-left:auto}
.search input{
  flex:1;height:42px;border:2px solid var(--main);border-right:none;
  padding:0 14px;font-size:13px;outline:none;border-radius:4px 0 0 4px;
}
.search button{
  width:86px;height:42px;background:var(--main);color:#fff;border:none;
  font-size:14px;cursor:pointer;border-radius:0 4px 4px 0;
}
.search button:hover{background:var(--main-dk)}
.head-cta{
  display:inline-block;background:var(--gold);color:#fff;
  padding:10px 22px;font-size:13px;border-radius:4px;
}
.head-cta:hover{opacity:.9}

.nav-main{background:var(--main)}
.nav-main .wrap{display:flex;align-items:center;height:48px;gap:0}
.nav-main a{
  color:#fff;font-size:15px;padding:0 24px;height:48px;
  display:inline-flex;align-items:center;
}
.nav-main a:hover{background:var(--main-dk)}
.nav-main a.on{background:var(--main-dk);font-weight:700}
.menu-toggle{display:none}

/* community status bar */
.status-bar{
  background:var(--white);border-bottom:1px solid var(--line);
}
.status-bar .wrap{
  display:flex;flex-wrap:wrap;gap:0;align-items:stretch;
}
.status-bar .item{
  flex:1;min-width:140px;padding:12px 16px;border-right:1px solid var(--line);
  display:flex;flex-direction:column;justify-content:center;
}
.status-bar .item:last-child{border-right:none}
.status-bar .item b{
  font-size:18px;color:var(--main);font-weight:700;line-height:1.3;
}
.status-bar .item span{
  font-size:12px;color:var(--sub);
}
.status-bar .item.gold b{color:var(--gold)}

/* layout */
.forum-layout{
  display:grid;grid-template-columns:240px 1fr 300px;gap:20px;
  padding:20px 0;
  align-items:start;
}

/* left board tree */
.tree{background:var(--white);border:1px solid var(--line);border-radius:6px;overflow:hidden}
.tree-head{
  padding:12px 16px;font-size:14px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--main),var(--main-dk));
}
.tree ul{padding:8px 0}
.tree li a{
  display:flex;align-items:center;gap:8px;
  padding:9px 16px;font-size:13.5px;color:var(--ink);
  border-left:3px solid transparent;
}
.tree li a:hover{background:#f4f9f6;color:var(--main);border-left-color:var(--gold)}
.tree li a i{
  width:6px;height:6px;background:var(--main);border-radius:50%;flex-shrink:0;
}
.tree li a em{
  font-style:normal;margin-left:auto;font-size:11px;color:#fff;
  background:var(--hot);padding:1px 6px;border-radius:8px;
}

.tree-box{
  background:var(--white);border:1px solid var(--line);border-radius:6px;
  margin-top:16px;overflow:hidden;
}
.tree-box h3{
  padding:10px 16px;font-size:13.5px;color:var(--main);
  border-bottom:1px solid var(--line);background:#fbfdfc;
}
.tree-box .body{padding:12px 16px;font-size:12.5px;color:var(--sub);line-height:1.9}
.tree-box .body b{color:var(--main)}

/* focus strip */
.focus{
  display:grid;grid-template-columns:1.6fr 1fr;gap:12px;
  background:var(--white);padding:12px;border:1px solid var(--line);border-radius:6px;
}
.focus-main{
  position:relative;overflow:hidden;height:300px;background:#dbe8e2;border-radius:4px;display:block;
}
.focus-main img{width:100%;height:100%;object-fit:cover;display:block}
.focus-main .cap{
  position:absolute;left:0;right:0;bottom:0;
  background:linear-gradient(transparent,rgba(32,48,42,.9));
  color:#fff;padding:48px 20px 16px;
}
.focus-main .cap h3{font-size:19px;line-height:1.4;font-weight:700}
.focus-main .cap .m{font-size:12px;opacity:.85;margin-top:6px}
.focus-side{display:flex;flex-direction:column;gap:12px}
.focus-side a{
  position:relative;flex:1;overflow:hidden;background:#dbe8e2;
  border-radius:4px;display:block;
}
.focus-side a img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.focus-side a .cap{
  position:relative;z-index:2;height:100%;display:flex;align-items:flex-end;
  background:linear-gradient(transparent,rgba(32,48,42,.85));
  color:#fff;padding:12px 14px;
}
.focus-side a .cap h4{
  font-size:13.5px;line-height:1.4;font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}

/* board cards */
.section-title{
  display:flex;align-items:center;justify-content:space-between;
  margin:20px 0 12px;padding-bottom:8px;border-bottom:2px solid var(--main);
}
.section-title h2{font-size:17px;color:var(--main);font-weight:700}
.section-title .more{font-size:12px;color:var(--sub)}
.section-title .more:hover{color:var(--main)}

.board-cards{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;
}
.board-card{
  background:var(--white);border:1px solid var(--line);border-radius:6px;
  padding:16px;display:block;position:relative;
  transition:box-shadow .3s,border-color .3s,transform .3s;
}
.board-card:hover{
  box-shadow:0 8px 22px rgba(31,122,90,.14);border-color:#bcd8cc;transform:translateY(-2px);
}
.board-card .bc-icon{
  width:44px;height:44px;border-radius:50%;flex-shrink:0;
  background:var(--main-lt);color:var(--main);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:700;margin-bottom:10px;
}
.board-card h3{font-size:15px;font-weight:700;color:var(--ink)}
.board-card p{
  font-size:12.5px;color:var(--sub);margin-top:6px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.board-card .stat{
  margin-top:10px;font-size:12px;color:var(--sub);
  display:flex;gap:14px;border-top:1px dashed var(--line);padding-top:10px;
}
.board-card .stat b{color:var(--main)}

/* thread stream */
.thread-box{
  background:var(--white);border:1px solid var(--line);border-radius:6px;margin-top:20px;overflow:hidden;
}
.thread-box .box-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;height:48px;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#f6faf8,#fff);
}
.thread-box .box-head h2{
  font-size:16px;font-weight:700;position:relative;padding-left:14px;color:var(--main);
}
.thread-box .box-head h2::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:16px;background:var(--gold);border-radius:1px;
}
.thread-box .box-head .more{font-size:12px;color:var(--sub)}
.thread-box .box-head .more:hover{color:var(--main)}

.thread-stream{padding:4px 0}
.thread-stream li{
  display:flex;gap:12px;padding:14px 16px;border-bottom:1px solid var(--line);
  align-items:flex-start;
}
.thread-stream li:last-child{border-bottom:none}
.thread-stream li:hover{background:#fbfdfc}
.ts-avatar{
  width:42px;height:42px;flex-shrink:0;border-radius:50%;
  background:linear-gradient(135deg,var(--main),var(--gold));
  color:#fff;font-size:15px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.ts-main{flex:1;min-width:0}
.ts-main h4{
  font-size:14.5px;line-height:1.5;font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.ts-main h4 a:hover{color:var(--main)}
.ts-main .ts-meta{font-size:12px;color:#9aa9a2;margin-top:5px}
.ts-main .ts-meta span{margin-right:14px}
.ts-tag{
  flex-shrink:0;font-size:11px;color:#fff;background:var(--main);
  padding:2px 8px;border-radius:3px;line-height:1.7;margin-top:2px;
}
.ts-tag.hot{background:var(--hot)}
.ts-tag.gold{background:var(--gold)}
.ts-thumb{
  width:78px;height:58px;flex-shrink:0;overflow:hidden;background:#dbe8e2;border-radius:4px;
}
.ts-thumb img{width:100%;height:100%;object-fit:cover}

/* grid news */
.grid-news{display:grid;grid-template-columns:repeat(2,1fr);gap:0}
.grid-news .gi{
  padding:16px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:block;
}
.grid-news .gi:nth-child(2n){border-right:none}
.grid-news .gi img{width:100%;height:140px;object-fit:cover;background:#dbe8e2;border-radius:4px}
.grid-news .gi h3{font-size:14.5px;line-height:1.5;margin-top:10px;font-weight:600}
.grid-news .gi h3 a:hover{color:var(--main)}
.grid-news .gi .m{font-size:12px;color:#9aa9a2;margin-top:8px}

/* right side */
.side-box{
  background:var(--white);border:1px solid var(--line);border-radius:6px;
  margin-bottom:16px;overflow:hidden;
}
.side-box .box-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 14px;height:44px;border-bottom:1px solid var(--line);
  background:#fbfdfc;
}
.side-box .box-head h2{
  font-size:14px;font-weight:700;color:var(--main);
}
.side-box .box-head .more{font-size:12px;color:var(--sub)}
.side-box .box-head .more:hover{color:var(--main)}

.rank-list{padding:6px 14px 12px}
.rank-list li{
  display:flex;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line);
}
.rank-list li:last-child{border-bottom:none}
.rank-list .no{
  width:20px;height:20px;flex-shrink:0;background:#eef4f1;color:var(--sub);
  font-size:12px;display:flex;align-items:center;justify-content:center;
  border-radius:3px;font-weight:700;
}
.rank-list li:nth-child(1) .no{background:var(--hot);color:#fff}
.rank-list li:nth-child(2) .no{background:var(--gold);color:#fff}
.rank-list li:nth-child(3) .no{background:#8fc9b4;color:#fff}
.rank-list .rt{font-size:13px;line-height:1.55;flex:1}
.rank-list .rt a{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rank-list .rt a:hover{color:var(--main)}

.user-list{padding:10px 14px 14px;display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.user-list a{text-align:center;font-size:12px;color:var(--sub);display:block}
.user-list a i{
  display:block;width:38px;height:38px;margin:0 auto 6px;border-radius:50%;
  background:linear-gradient(135deg,var(--main),var(--gold));color:#fff;
  font-style:normal;font-size:14px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.user-list a span{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.user-list a:hover{color:var(--main)}

.tag-cloud{padding:12px 14px}
.tag-cloud a{
  display:inline-block;padding:4px 11px;margin:0 7px 7px 0;
  background:var(--bg);border:1px solid var(--line);
  font-size:12px;color:var(--sub);border-radius:4px;
}
.tag-cloud a:hover{background:var(--main);border-color:var(--main);color:#fff}

/* footer */
.site-foot{background:#20302a;color:#8b9d94;margin-top:36px;padding:44px 0 0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.foot-brand b{display:block;color:#fff;font-size:20px;letter-spacing:2px;margin-bottom:12px}
.foot-brand p{font-size:12.5px;line-height:1.9;max-width:30em}
.foot-col h4{color:#fff;font-size:13px;margin-bottom:14px;font-weight:600}
.foot-col li{margin-bottom:9px}
.foot-col a{font-size:12.5px;color:#8b9d94}
.foot-col a:hover{color:#fff}
.foot-bottom{
  margin-top:36px;border-top:1px solid #2c4038;padding:18px 0;
  text-align:center;font-size:12px;color:#5c6b64;
}

/* list page */
.crumb{font-size:12px;color:var(--sub);padding:14px 0}
.crumb a{color:var(--sub)}
.crumb a:hover{color:var(--main)}
.list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.list-grid .li{
  background:var(--white);border:1px solid var(--line);border-radius:6px;display:block;overflow:hidden;
  transition:box-shadow .3s,border-color .3s;
}
.list-grid .li:hover{box-shadow:0 6px 20px rgba(31,122,90,.12);border-color:#bcd8cc}
.list-grid .li img{width:100%;height:170px;object-fit:cover;background:#dbe8e2}
.list-grid .li .body{padding:14px}
.list-grid .li .cat{font-size:12px;color:var(--main);margin-bottom:6px}
.list-grid .li h3{font-size:15px;line-height:1.5;font-weight:600;min-height:44px}
.list-grid .li h3 a:hover{color:var(--main)}
.list-grid .li p{
  font-size:12.5px;color:var(--sub);margin-top:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.list-grid .li .m{font-size:12px;color:#9aa9a2;margin-top:10px}

.pager{display:flex;justify-content:center;gap:8px;padding:34px 0}
.pager a,.pager span{
  min-width:36px;height:36px;padding:0 12px;background:#fff;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;color:var(--sub);border-radius:4px;
}
.pager a:hover{border-color:var(--main);color:var(--main)}

/* article page */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:24px;padding:20px 0;align-items:start}
.article-box{background:#fff;border:1px solid var(--line);border-radius:6px;padding:34px 40px 40px}
.article-box h1{font-size:26px;line-height:1.5;font-weight:700}
.article-meta{
  font-size:12.5px;color:var(--sub);margin-top:14px;
  padding-bottom:18px;border-bottom:1px solid var(--line);
}
.article-meta span{margin-right:18px}
.article-body{font-size:15.5px;line-height:2;color:#2a2f3a;margin-top:24px}
.article-body p{margin-bottom:20px}
.article-body h2{
  font-size:19px;margin:32px 0 16px;font-weight:700;
  padding-left:12px;border-left:4px solid var(--main);color:var(--main-dk);
}
.article-body h3{font-size:16px;margin:26px 0 12px;font-weight:700}
.article-body img{margin:20px 0;border-radius:4px}
.article-body blockquote{
  background:var(--main-lt);border-left:4px solid var(--main);
  padding:14px 18px;margin:22px 0;color:var(--main-dk);font-size:14.5px;border-radius:0 4px 4px 0;
}
.article-nav{
  margin-top:36px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:13px;color:var(--sub);
}
.article-nav a:hover{color:var(--main)}

@media(max-width:1240px){
  .forum-layout{grid-template-columns:220px 1fr 280px}
  .board-cards{grid-template-columns:repeat(2,1fr)}
  .list-grid{grid-template-columns:repeat(2,1fr)}
  .article-layout{grid-template-columns:1fr 260px}
  .article-box{padding:28px 26px 32px}
  .foot-grid{grid-template-columns:1.4fr 1fr 1fr}
  .foot-grid .foot-col:last-child{grid-column:span 3}
}

@media(max-width:1024px){
  .forum-layout{grid-template-columns:1fr 1fr}
  .tree{order:2}
  .main-col{order:1;grid-column:span 2}
  .side{order:3;grid-column:span 2}
}

@media(max-width:768px){
  .topbar{display:none}
  .head-main .wrap{height:auto;padding:12px 20px;flex-wrap:wrap;gap:12px}
  .search{order:3;width:100%;max-width:100%;margin-left:0}
  .head-cta{display:none}
  .menu-toggle{
    display:block;width:38px;height:38px;background:var(--main);border:none;
    cursor:pointer;border-radius:4px;position:relative;
  }
  .menu-toggle span{
    position:absolute;left:10px;right:10px;height:2px;background:#fff;
  }
  .menu-toggle span:nth-child(1){top:12px}
  .menu-toggle span:nth-child(2){top:18px}
  .menu-toggle span:nth-child(3){top:24px}
  .nav-main .wrap{height:auto;flex-direction:column;align-items:stretch;display:none}
  .nav-main .wrap.open{display:flex}
  .nav-main a{padding:14px 20px;height:auto;border-bottom:1px solid rgba(255,255,255,.12)}
  .status-bar .item{min-width:50%;flex:1 1 50%;border-bottom:1px solid var(--line)}
  .forum-layout{grid-template-columns:1fr;padding:16px 0}
  .main-col{order:1;grid-column:auto}
  .tree{order:2;grid-column:auto}
  .side{order:3;grid-column:auto}
  .focus{grid-template-columns:1fr;padding:10px}
  .focus-main{height:200px}
  .focus-main .cap{padding:28px 14px 12px}
  .focus-main .cap h3{font-size:15px}
  .focus-side{flex-direction:row}
  .focus-side a{min-height:90px}
  .focus-side a .cap h4{font-size:12px}
  .board-cards{grid-template-columns:1fr}
  .ts-thumb{display:none}
  .grid-news{grid-template-columns:1fr}
  .grid-news .gi{border-right:none}
  .list-grid{grid-template-columns:1fr}
  .article-layout{grid-template-columns:1fr;padding:16px 0}
  .article-box{padding:20px 16px 26px}
  .article-box h1{font-size:19px}
  .article-body{font-size:15px}
  .user-list{grid-template-columns:repeat(4,1fr)}
  .site-foot{padding:30px 0 0}
  .foot-grid{grid-template-columns:1fr 1fr;gap:22px}
  .foot-grid .foot-brand{grid-column:span 2}
  .foot-grid .foot-col:last-child{grid-column:span 2}
}