:root{
  --green:#4a7c3f;
  --green-deep:#3d6b34;
  --green-dark:#2f4a2a;
  --gold:#d9a441;
  --gold-deep:#c08f2e;
  --blue:#5b9bc9;
  --blue-deep:#4a86ad;
  --bg:#faf9f4;
  --line:#e5e2d8;
  --text:#333;
  --muted:#888;
}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.7;}
a{color:var(--green);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;}

/* 顶部导航 */
.nav{display:flex;align-items:center;justify-content:space-between;padding:10px 28px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;}
.brand{display:flex;align-items:center;gap:12px;}
.brand:hover{text-decoration:none;}
.brand img{width:44px;height:44px;flex-shrink:0;object-fit:contain;display:block;}
.brand>span{display:flex;flex-direction:column;justify-content:center;line-height:1.15;}
.brand .name{display:block;font-weight:700;color:var(--green-dark);font-size:17px;line-height:1.15;letter-spacing:.02em;}
.brand .sub{display:block;font-size:10px;color:#9aa392;letter-spacing:.16em;margin-top:3px;font-weight:500;}
.nav-links{display:flex;align-items:center;gap:22px;}
.nav-links a{color:#555;font-size:14px;}
.nav-links a:hover{color:var(--green);text-decoration:none;}
.nav-links a.active{color:var(--green-deep);font-weight:700;}
.nav-links a.lang{background:transparent;border:1.5px solid var(--green);color:var(--green-deep);padding:3px 16px;border-radius:20px;font-size:12px;font-weight:600;line-height:1.5;}
.nav-links a.lang:hover{background:var(--green);color:#fff;text-decoration:none;}

/* Hero */
.hero{background:linear-gradient(135deg,var(--green-deep),var(--green));color:#fff;padding:60px max(calc((100% - 1080px)/2 + 28px), 28px);position:relative;overflow:hidden;}
.hero h1{font-size:34px;margin-bottom:12px;}
.hero p{font-size:16px;color:#e4efe0;max-width:560px;}
.hero .btns{margin-top:24px;display:flex;gap:14px;}
.btn{display:inline-block;padding:10px 24px;border-radius:24px;font-size:14px;font-weight:600;}
.btn-gold{background:var(--gold);color:#3d2e10;}
.btn-gold:hover{background:#e7b657;text-decoration:none;}
.btn-ghost{border:1px solid #fff;color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.12);text-decoration:none;}
.hero .deco{position:absolute;right:-30px;bottom:-40px;width:240px;height:240px;border-radius:50%;background:rgba(255,255,255,.08);}
.hero .deco2{position:absolute;right:120px;top:-30px;width:140px;height:140px;border-radius:50%;background:rgba(123,179,216,.25);}

/* 区块 */
.section{padding:48px 28px;max-width:1080px;margin:0 auto;}
.section h2{font-size:22px;color:var(--green-dark);margin-bottom:20px;display:flex;align-items:center;gap:10px;}
.section h2::before{content:"";width:6px;height:22px;background:var(--gold);border-radius:3px;display:inline-block;}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px;position:relative;}
.card::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;border-radius:10px 10px 0 0;}
.card.g::before{background:var(--green);}
.card.g .t{color:var(--green);}
.card.y::before{background:var(--gold);}
.card.y .t{color:var(--gold-deep);}
.card.b::before{background:var(--blue);}
.card.b .t{color:var(--blue-deep);}
.card .t{font-size:16px;font-weight:700;margin-bottom:8px;}
.card p{font-size:13px;color:#666;}

/* 成员 logo 墙 */
.members{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;}
.member{background:#fff;border:1px solid var(--line);border-radius:8px;height:110px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#aaa;font-size:12px;text-align:center;padding:10px;gap:6px;transition:border-color .2s, box-shadow .2s;}
.member img{max-width:86%;max-height:52px;object-fit:contain;}
.member .mname{font-size:11px;color:#444;font-weight:600;line-height:1.35;}
.member .mrole{font-size:10px;color:#999;}
.member:hover{border-color:var(--green);box-shadow:0 2px 10px rgba(74,124,63,.14);text-decoration:none;}
.member.placeholder{border-style:dashed;color:#c2c2b8;font-size:11px;}

/* 工具产品卡片 */
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.tool-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px 20px;transition:border-color .2s, box-shadow .2s;display:flex;flex-direction:column;gap:8px;}
.tool-card:hover{border-color:var(--green);box-shadow:0 2px 12px rgba(74,124,63,.14);text-decoration:none;}
.tool-card .tag-line{font-size:11px;color:var(--gold-deep);font-weight:600;letter-spacing:.05em;}
.tool-card .t{font-size:16px;font-weight:700;color:#333;}
.tool-card p{font-size:13px;color:#666;flex:1;}
.tool-card .go{font-size:13px;color:var(--green-deep, #4a7c3f);font-weight:600;}
@media(max-width:900px){.tools-grid{grid-template-columns:1fr;}}

/* 新闻列表 */
.news-item{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-bottom:1px solid var(--line);}
.news-item .dot{width:10px;height:10px;border-radius:50%;background:var(--gold);margin-top:8px;flex-shrink:0;}
.news-item .date{font-size:12px;color:var(--muted);}
.news-item .title{font-size:15px;font-weight:600;color:#333;}

/* 研究列表 */
.research-list{list-style:none;}
.research-list li{padding:14px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;align-items:center;}
.research-list .meta{font-size:12px;color:var(--muted);}
.tag{display:inline-block;background:#eef3ec;color:var(--green);font-size:11px;padding:2px 10px;border-radius:12px;}

/* 伙伴动态机构标题（醒目 + 跳转官网） */
.partner-head{display:inline-flex;align-items:center;gap:8px;font-size:16px;font-weight:700;color:var(--green-dark);background:#eef3ec;border-left:4px solid var(--green);padding:9px 16px;border-radius:6px;margin:28px 0 10px;text-decoration:none;transition:background .2s,color .2s;}
.partner-head:hover{background:var(--green);color:#fff;}
.partner-head:hover .ext{color:#fff;}
.partner-head .ext{font-size:11px;color:var(--green);font-weight:400;transition:color .2s;}

/* 页脚 */
.footer{background:var(--green-dark);color:#c9d8c4;padding:28px;text-align:center;font-size:13px;margin-top:40px;}

/* 通用内容 */
.prose{max-width:760px;}
.prose p{margin-bottom:16px;color:#444;}
.prose h3{color:var(--green-dark);margin:24px 0 10px;font-size:17px;}
.breadcrumb{font-size:12px;color:var(--muted);margin-bottom:14px;}

@media (max-width:760px){
  .cards{grid-template-columns:1fr;}
  .members{grid-template-columns:repeat(2,1fr);}
  .nav-links{gap:12px;font-size:12px;}
  .hero h1{font-size:26px;}
}