:root{--primary:#FF4400;--primary-dark:#E63900;--bg:#F5F5F5;--surface:#FFF;--text:#333;--text2:#666;--text3:#999;--border:#E8E8E8;--radius:8px;--shadow:0 2px 8px rgba(0,0,0,.08)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{text-decoration:none;color:inherit}
/* 顶部栏 */
.topbar{background:#333;color:#ccc;font-size:12px;padding:6px 0}
.topbar-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center}
.topbar a{color:#ccc;margin-left:16px}
.topbar a:hover{color:#fff}
/* 顶部用户菜单（统一登录/用户入口） */
.topbar-right{display:flex;align-items:center;gap:16px}
.topbar-login{color:#ccc;cursor:pointer;margin:0}
.topbar-login:hover{color:#fff}
.user-menu-wrap{position:relative}
.user-menu-trigger{color:#ccc;cursor:pointer;display:inline-flex;align-items:center;gap:4px;margin:0}
.user-menu-trigger:hover{color:#fff}
.caret{font-size:10px}
.user-menu{position:absolute;right:0;top:28px;background:#fff;border:1px solid var(--border);border-radius:6px;box-shadow:0 8px 24px rgba(0,0,0,.15);min-width:120px;z-index:500;overflow:hidden}
.user-menu-item{padding:10px 16px;font-size:14px;color:var(--text);cursor:pointer}
.user-menu-item:hover{background:#FFF7E6;color:var(--primary)}
/* 头部 */
.header{background:#fff;padding:20px 0;border-bottom:2px solid var(--primary)}
.header-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:40px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:44px;height:44px;background:var(--primary);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;font-weight:800}
.logo-text{font-size:26px;font-weight:700;color:var(--primary)}
.search-box{flex:1;max-width:560px;display:flex}
.search-box input{flex:1;height:42px;padding:0 16px;border:2px solid var(--primary);border-right:none;border-radius:4px 0 0 4px;font-size:15px;outline:none}
.search-box button{width:90px;height:42px;background:var(--primary);color:#fff;border:none;border-radius:0 4px 4px 0;font-size:16px;cursor:pointer}
.search-box button:hover{background:var(--primary-dark)}
/* 分类导航 */
.cat-nav{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:90}
.cat-nav-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex}
.cat-item{padding:14px 24px;font-size:15px;color:var(--text);cursor:pointer;border-bottom:2px solid transparent;transition:.2s}
.cat-item:hover{color:var(--primary)}
.cat-item.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}
/* 主内容 */
.main{max-width:1200px;margin:0 auto;padding:24px 20px}
/* Banner */
.banner{border-radius:var(--radius);overflow:hidden;margin-bottom:28px;height:340px;background:linear-gradient(135deg,#667eea,#764ba2);position:relative;display:flex;align-items:center}
.banner-text{padding-left:60px;color:#fff;z-index:1}
.banner-title{font-size:38px;font-weight:700;margin-bottom:12px}
.banner-desc{font-size:16px;opacity:.9;margin-bottom:28px}
.banner-btn{padding:14px 36px;background:#fff;color:var(--primary);border:none;border-radius:4px;font-size:16px;font-weight:600;cursor:pointer}
.banner-btn:hover{background:#f5f5f5}
.banner-deco{position:absolute;right:80px;top:50%;transform:translateY(-50%);width:260px;height:260px;background:rgba(255,255,255,.08);border-radius:50%}
/* 区块 */
.section{margin-bottom:32px}
.section-hd{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.section-title{font-size:22px;font-weight:700}
.section-more{color:var(--text3);font-size:14px;cursor:pointer}
.section-more:hover{color:var(--primary)}
.about-box{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;font-size:15px;color:var(--text2);line-height:1.9}
/* 企业卡片 */
.ent-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.ent-card{background:#fff;border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);cursor:pointer;transition:.3s;text-align:center}
.ent-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.ent-logo{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);margin:0 auto 14px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:24px;font-weight:700}
.ent-logo img{width:100%;height:100%;border-radius:50%;object-fit:cover}
.ent-name{font-size:15px;font-weight:600;margin-bottom:8px}
.ent-desc{font-size:12px;color:var(--text3);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;height:36px}
.ent-cert{display:inline-block;font-size:11px;padding:2px 8px;background:#f6ffed;color:#52C41A;border-radius:4px;margin-top:10px}
/* 产品卡片 */
.product-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.product-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);cursor:pointer;transition:.3s}
.product-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.product-cover{width:100%;aspect-ratio:1;overflow:hidden;background:#f5f5f5}
.product-cover img{width:100%;height:100%;object-fit:cover;transition:.3s}
.product-card:hover .product-cover img{transform:scale(1.05)}
.product-info{padding:12px}
.product-title{font-size:14px;color:var(--text);margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:38px}
.product-ent{font-size:12px;color:var(--text3)}
/* 消息列表（后台会话复用） */
.msg-list{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
.msg-item{padding:16px 20px;border-bottom:1px solid #f0f0f0;cursor:pointer;display:flex;align-items:center;gap:14px;transition:.2s}
.msg-item:hover{background:#FAFAFA}
.msg-item.active{background:#FFF7E6}
.msg-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.msg-avatar img{width:100%;height:100%;border-radius:50%;object-fit:cover}
.msg-info{flex:1;min-width:0}
.msg-name{font-size:14px;font-weight:500;margin-bottom:4px}
.msg-last{font-size:13px;color:var(--text3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.msg-time{font-size:12px;color:#ccc;flex-shrink:0}
/* 个人主页（资料编辑复用） */
.profile-hd{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:var(--radius);padding:44px;text-align:center;color:#fff;margin-bottom:24px}
.profile-avatar{width:100px;height:100px;border-radius:50%;border:4px solid rgba(255,255,255,.8);margin:0 auto 16px;overflow:hidden;background:#667eea;display:flex;align-items:center;justify-content:center;color:#fff;font-size:36px}
.profile-avatar img{width:100%;height:100%;border-radius:50%;object-fit:cover}
.profile-name{font-size:24px;font-weight:700;margin-bottom:8px}
.profile-sig{font-size:14px;opacity:.8;margin-bottom:20px}
.profile-stats{display:flex;justify-content:center;gap:48px}
.profile-stat-num{font-size:28px;font-weight:700}
.profile-stat-label{font-size:13px;opacity:.7}
/* Toast */
.toast{position:fixed;bottom:40px;left:50%;transform:translateX(-50%);background:rgba(0,0,0,.75);color:#fff;padding:12px 24px;border-radius:4px;font-size:14px;z-index:2000;display:none;max-width:80vw;text-align:center}
.toast.show{display:block;animation:fadeToast 2s ease}
@keyframes fadeToast{0%{opacity:0}10%{opacity:1}90%{opacity:1}100%{opacity:0}}
/* 空状态 */
.empty{text-align:center;padding:60px;color:var(--text3)}
.empty-icon{font-size:48px;margin-bottom:12px}
/* 聊天气泡 */
.bubble{max-width:60%;padding:12px 16px;border-radius:8px;margin-bottom:12px;line-height:1.5;font-size:14px;word-break:break-word}
.bubble-self{background:var(--primary);color:#fff;margin-left:auto}
.bubble-other{background:#f0f0f0;color:var(--text);margin-right:auto}
.bubble-risk{font-size:12px;color:#FAAD14;margin-top:6px;padding:6px 10px;background:#FFFBE6;border-radius:4px;border:1px solid #FFE58F}

/* ============ 详情视图 ============ */
.detail-back{margin-bottom:18px;color:var(--text2);cursor:pointer;font-size:14px;display:inline-block}
.detail-back:hover{color:var(--primary)}
.detail-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;margin-bottom:28px}
.pd-gallery{display:flex;flex-direction:column;gap:12px;margin-bottom:20px}
.pd-cover{width:100%;max-height:420px;object-fit:contain;background:#f5f5f5;border-radius:8px}
.pd-ph{width:100%;height:300px;display:flex;align-items:center;justify-content:center;font-size:80px;background:#f5f5f5;border-radius:8px}
.pd-thumbs{display:flex;gap:8px;flex-wrap:wrap}
.pd-thumb{width:64px;height:64px;object-fit:cover;border-radius:6px;border:1px solid var(--border);cursor:pointer}
.pd-title{font-size:26px;font-weight:700;margin-bottom:12px}
.pd-ent{color:var(--primary);cursor:pointer;font-size:14px;margin-bottom:12px}
.pd-ent:hover{text-decoration:underline}
.pd-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.tag{font-size:12px;padding:3px 10px;background:#FFF7E6;color:var(--primary);border-radius:4px}
.pd-desc{font-size:15px;color:var(--text);line-height:1.8;white-space:pre-wrap;word-break:break-word}
.pd-meta{margin-top:16px;font-size:13px;color:var(--text3)}
.ent-detail-hd{display:flex;align-items:center;gap:16px;margin-bottom:18px}
.ent-logo.lg{width:80px;height:80px;font-size:32px;margin:0}

/* ============ 登录（全屏 SPA 视图） ============ */
.page-login{position:fixed;inset:0;z-index:1000;background:linear-gradient(135deg,#FF4400,#FF7A45);overflow:auto;padding:24px}
.login-card{display:flex;max-width:880px;width:100%;margin:auto;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.25);min-height:480px}
.login-brand{flex:1;background:linear-gradient(135deg,#FF4400,#FF7A45);color:#fff;padding:48px 40px;display:flex;flex-direction:column;justify-content:center;gap:14px}
.login-brand .logo-icon{width:56px;height:56px;font-size:26px}
.login-brand-title{font-size:30px;font-weight:800}
.login-brand-sub{font-size:15px;opacity:.9}
.login-back{margin-top:auto;color:#fff;opacity:.85;cursor:pointer;font-size:14px;align-self:flex-start}
.login-back:hover{opacity:1;text-decoration:underline}
.login-form{flex:1;padding:48px 40px;display:flex;flex-direction:column;justify-content:center}
.login-tabs{display:flex;gap:8px;margin-bottom:20px}
.login-tab{flex:1;text-align:center;padding:10px;cursor:pointer;border:1px solid var(--border);border-radius:6px;font-size:15px;color:var(--text2)}
.login-tab.active{color:var(--primary);border-color:var(--primary);background:#FFF7E6;font-weight:600}
.login-form input{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:6px;font-size:15px;margin-bottom:14px;outline:none}
.login-form input:focus{border-color:var(--primary)}
.captcha-row{display:flex;gap:8px;margin-bottom:14px}
.captcha-img{width:110px;height:42px;border:1px solid var(--border);border-radius:6px;cursor:pointer;flex-shrink:0;background:#f5f5f5}
.captcha-input{flex:1;padding:12px 14px;border:1px solid var(--border);border-radius:6px;font-size:15px;outline:none}
.captcha-input:focus{border-color:var(--primary)}
.btn-refresh{padding:0 12px;background:#f5f5f5;border:1px solid var(--border);border-radius:6px;cursor:pointer;font-size:13px;color:var(--text2);flex-shrink:0}
.btn-refresh:hover{color:var(--primary)}
.input-row{display:flex;gap:8px;margin-bottom:14px}
.input-row input{flex:1;margin-bottom:0}
.btn-code{padding:0 16px;background:#f5f5f5;border:1px solid var(--border);border-radius:6px;cursor:pointer;font-size:14px;color:var(--primary);white-space:nowrap;flex-shrink:0}
.btn-code:hover{background:#FFF7E6}
.btn-code:disabled{color:var(--text3);cursor:not-allowed;background:#f5f5f5}
.login-tip{text-align:center;font-size:12px;color:var(--text3);margin-top:10px}

/* ============ 后台 ============ */
.dash{display:flex;gap:24px;align-items:flex-start}
.dash-side{width:200px;flex-shrink:0;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;position:sticky;top:80px}
.dash-tab{padding:16px 20px;font-size:15px;color:var(--text);cursor:pointer;border-left:3px solid transparent}
.dash-tab:hover{background:#FFF7E6}
.dash-tab.active{color:var(--primary);border-left-color:var(--primary);background:#FFF7E6;font-weight:600}
.dash-tab.dash-logout{color:var(--text3);border-top:1px solid var(--border)}
.dash-main{flex:1;min-width:0;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}
.dash-hd{font-size:20px;font-weight:700;margin-bottom:22px}
.form-row{display:flex;align-items:flex-start;gap:16px;margin-bottom:18px}
.form-row label{width:80px;flex-shrink:0;font-size:14px;color:var(--text2);padding-top:10px}
.form-input{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:6px;font-size:14px;outline:none;font-family:inherit}
.form-input:focus{border-color:var(--primary)}
.avatar-edit{display:flex;align-items:center;gap:16px}
.profile-avatar.sm{width:64px;height:64px;font-size:22px;margin:0}
.avatar-btn{font-size:13px;color:var(--primary);cursor:pointer;border:1px solid var(--primary);padding:6px 14px;border-radius:6px;background:#FFF7E6}
.avatar-btn:hover{background:#FFE7D6}
.btn-primary{width:100%;padding:14px;background:var(--primary);color:#fff;border:none;border-radius:4px;font-size:15px;font-weight:500;cursor:pointer;margin-top:8px}
.btn-primary:hover{background:var(--primary-dark)}
.btn-primary.sm{width:auto;padding:10px 22px;margin-top:0}
/* 消息面板 */
.msg-panel{display:flex;border:1px solid var(--border);border-radius:8px;overflow:hidden;min-height:420px}
.conv-list{width:300px;flex-shrink:0;border-right:1px solid var(--border);overflow:auto;max-height:520px}
.chat-box{flex:1;display:flex;flex-direction:column;min-width:0}
.chat-hd{padding:14px 18px;border-bottom:1px solid var(--border);font-weight:600;font-size:15px}
.chat-msgs{flex:1;padding:18px;overflow:auto;background:#FAFAFA;max-height:440px}
.chat-input{display:flex;gap:8px;padding:14px 18px;border-top:1px solid var(--border)}
.chat-input .form-input{margin:0}

/* ============ 响应式基础 ============ */
@media(max-width:1100px) and (min-width:769px){
  .product-grid{grid-template-columns:repeat(4,1fr)}
}
@media(max-width:768px){
  .header-inner{flex-wrap:wrap;gap:12px}
  .search-box{order:3;max-width:none;width:100%}
  .cat-item{padding:12px 14px;font-size:14px}
  .banner{height:240px}
  .banner-text{padding-left:24px}
  .banner-title{font-size:26px}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .ent-grid{grid-template-columns:repeat(2,1fr)}
  .login-card{flex-direction:column;min-height:auto}
  .login-brand{padding:32px 24px}
  .login-form{padding:32px 24px}
  .dash{flex-direction:column}
  .dash-side{width:100%;position:static;display:flex;overflow:auto}
  .dash-tab{flex:1;text-align:center;border-left:none;border-bottom:3px solid transparent}
  .dash-tab.active{border-left:none;border-bottom-color:var(--primary)}
  .dash-main{padding:20px}
  .msg-panel{flex-direction:column}
  .conv-list{width:100%;border-right:none;border-bottom:1px solid var(--border);max-height:200px}
  .form-row{flex-direction:column;gap:6px}
  .form-row label{width:auto;padding-top:0}
}