:root{
  --primary:#1e88e5;
  --primary-dark:#1565c0;
  --primary-light:#64b5f6;
  --accent:#00acc1;
  --success:#43a047;
  --warning:#fb8c00;
  --danger:#e53935;
  --dark:#263238;
  --gray:#607d8b;
  --bg:#f4f7fa;
  --border:#e3e8ee;
  --text:#37474f;
  --radius:8px;
  --shadow:0 2px 12px rgba(30,136,229,.08);
  --shadow-lg:0 8px 30px rgba(30,136,229,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",Helvetica,Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;font-size:14px}
a{color:var(--primary);text-decoration:none;transition:.2s}
a:hover{color:var(--primary-dark)}
img{max-width:100%}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.text-center{text-align:center}
.text-right{text-align:right}
.text-muted{color:var(--gray)}
.text-danger{color:var(--danger)}
.text-success{color:var(--success)}
.text-primary{color:var(--primary)}
.mt-1{margin-top:10px}.mt-2{margin-top:20px}.mt-3{margin-top:30px}
.mb-1{margin-bottom:10px}.mb-2{margin-bottom:20px}.mb-3{margin-bottom:30px}
.pull-right{float:right}
.hidden{display:none}

/* Header */
.site-header{background:#fff;box-shadow:var(--shadow);position:relative}
.header-top{background:var(--dark);color:#cfd8dc;font-size:12px;padding:6px 0}
.header-top a{color:#cfd8dc}
.header-top .container{display:flex;justify-content:space-between;align-items:center}
.header-main{padding:14px 0}
.header-main .container{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;color:var(--primary)}
.logo .logo-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px}
.main-nav{display:flex;gap:6px}
.main-nav a{padding:8px 16px;color:var(--text);border-radius:var(--radius);font-weight:500}
.main-nav a:hover,.main-nav a.active{background:var(--primary);color:#fff}
.header-user{display:flex;align-items:center;gap:12px}
.btn{display:inline-block;padding:8px 18px;border:none;border-radius:var(--radius);cursor:pointer;font-size:14px;font-weight:500;transition:.2s;line-height:1.4}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-outline{background:transparent;border:1px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-success{background:var(--success);color:#fff}
.btn-danger{background:var(--danger);color:#fff}
.btn-warning{background:var(--warning);color:#fff}
.btn-sm{padding:4px 12px;font-size:12px}
.btn-lg{padding:12px 28px;font-size:16px}
.btn-block{display:block;width:100%}

/* Hero */
.hero{background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 50%,var(--accent) 100%);color:#fff;padding:60px 0;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;right:-100px;top:-100px;width:400px;height:400px;background:rgba(255,255,255,.08);border-radius:50%}
.hero::after{content:"";position:absolute;left:-50px;bottom:-80px;width:250px;height:250px;background:rgba(255,255,255,.06);border-radius:50%}
.hero h1{font-size:42px;font-weight:700;margin-bottom:16px;position:relative}
.hero p{font-size:18px;opacity:.9;margin-bottom:28px;position:relative;max-width:600px}
.hero .hero-actions{position:relative;display:flex;gap:16px}
.hero .btn-primary{background:#fff;color:var(--primary)}
.hero .btn-primary:hover{background:#e3f2fd}
.hero .btn-outline{border-color:#fff;color:#fff}
.hero .btn-outline:hover{background:#fff;color:var(--primary)}
.hero-stats{display:flex;gap:40px;margin-top:40px;position:relative}
.hero-stats .stat-num{font-size:32px;font-weight:700}
.hero-stats .stat-label{font-size:13px;opacity:.8}

/* Section */
.section{padding:50px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:28px;color:var(--dark);font-weight:700}
.section-title p{color:var(--gray);margin-top:8px}
.section-title::after{content:"";display:block;width:50px;height:3px;background:var(--primary);margin:12px auto 0;border-radius:2px}

/* Cards */
.card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:.2s}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.card-body{padding:20px}
.card-header{padding:16px 20px;border-bottom:1px solid var(--border);font-weight:600;display:flex;justify-content:space-between;align-items:center}

/* Product grid */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.product-card .card-body{padding:16px}
.product-tag{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;color:#fff;margin-bottom:8px}
.tag-guarantee{background:var(--success)}
.tag-free{background:var(--accent)}
.product-title{font-size:15px;font-weight:600;color:var(--dark);margin-bottom:8px;height:44px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.product-price{color:var(--danger);font-size:20px;font-weight:700}
.product-price small{font-size:12px;color:var(--gray);font-weight:400;text-decoration:line-through;margin-left:6px}
.product-meta{display:flex;justify-content:space-between;color:var(--gray);font-size:12px;margin-top:10px;padding-top:10px;border-top:1px solid var(--border)}

/* Category nav */
.category-bar{background:#fff;border-radius:var(--radius);padding:12px 20px;box-shadow:var(--shadow);margin-bottom:24px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.trade-rules{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:24px}
.trade-rules:has(> :only-child){grid-template-columns:1fr}
.rule-card{border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}
.rule-card.rule-guarantee{background:linear-gradient(135deg,#e8f5e9,#f1f8e9);border-left:4px solid var(--success)}
.rule-card.rule-free{background:linear-gradient(135deg,#e3f2fd,#e0f7fa);border-left:4px solid var(--accent)}
.rule-head{font-weight:700;font-size:15px;margin-bottom:10px;color:var(--dark)}
.rule-card ul{list-style:none;padding:0;margin:0}
.rule-card li{font-size:13px;color:var(--text);line-height:1.9;padding-left:18px;position:relative}
.rule-card li::before{content:"✓";position:absolute;left:0;color:var(--success);font-weight:700}
.rule-free li::before{color:var(--accent)}
.order-flow{display:flex;align-items:center;gap:4px;margin:10px 0;padding:10px 0}
.order-flow .flow-step{display:flex;align-items:center;gap:4px;font-size:12px;color:var(--gray)}
.order-flow .flow-dot{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;background:var(--bg);color:var(--gray)}
.order-flow .flow-step.done .flow-dot{background:var(--success);color:#fff}
.order-flow .flow-step.current .flow-dot{background:var(--primary);color:#fff}
.order-flow .flow-step.done .flow-label{color:var(--text)}
.order-flow .flow-step.current .flow-label{color:var(--primary);font-weight:600}
.order-flow .flow-line{width:24px;height:2px;background:var(--border)}
.order-flow .flow-step.done+.flow-line{background:var(--success)}
.category-bar a{padding:6px 14px;border-radius:20px;color:var(--text);font-size:13px}
.category-bar a.active,.category-bar a:hover{background:var(--primary);color:#fff}

/* Features */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-item{text-align:center;padding:24px}
.feature-icon{width:64px;height:64px;margin:0 auto 16px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:28px;color:#fff}
.feature-item h3{font-size:18px;margin-bottom:8px;color:var(--dark)}
.feature-item p{color:var(--gray);font-size:13px}

/* Footer */
.site-footer{background:var(--dark);color:#b0bec5;padding:40px 0 20px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-grid h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-grid a{color:#b0bec5;display:block;margin-bottom:8px;font-size:13px}
.footer-grid a:hover{color:var(--primary-light)}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid #37474f;font-size:12px}

/* Form */
.form-group{margin-bottom:18px}
.form-label{display:block;margin-bottom:6px;font-weight:500;color:var(--dark)}
.form-control{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;transition:.2s;background:#fff}
.form-control:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(30,136,229,.1)}
textarea.form-control{min-height:100px;resize:vertical}
.form-row{display:flex;gap:16px}
.form-row .form-group{flex:1}
.form-hint{color:var(--gray);font-size:12px;margin-top:4px}
.form-error{color:var(--danger);font-size:12px;margin-top:4px}

/* Auth */
.auth-wrap{min-height:calc(100vh - 200px);display:flex;align-items:center;justify-content:center;padding:40px 0}
.auth-box{width:420px;max-width:100%}
.auth-box .card-body{padding:32px}
.auth-box h2{text-align:center;margin-bottom:24px;color:var(--dark)}
.auth-footer{text-align:center;margin-top:16px;color:var(--gray);font-size:13px}

/* Alert */
.alert{padding:12px 16px;border-radius:var(--radius);margin-bottom:16px;font-size:13px}
.alert-success{background:#e8f5e9;color:#2e7d32;border:1px solid #c8e6c9}
.alert-danger{background:#fbe9e7;color:#c62828;border:1px solid #ffccbc}
.alert-warning{background:#fff3e0;color:#e65100;border:1px solid #ffe0b2}
.alert-info{background:#e3f2fd;color:#1565c0;border:1px solid #bbdefb}

/* Table */
.table{width:100%;border-collapse:collapse;background:#fff}
.table th,.table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);font-size:13px}
.table th{background:var(--bg);font-weight:600;color:var(--dark)}
.table tr:hover{background:#f8fafd}

/* Badge */
.badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:500}
.badge-primary{background:#e3f2fd;color:var(--primary)}
.badge-success{background:#e8f5e9;color:var(--success)}
.badge-warning{background:#fff3e0;color:var(--warning)}
.badge-danger{background:#fbe9e7;color:var(--danger)}
.badge-gray{background:#eceff1;color:var(--gray)}

/* Pagination */
.pagination{display:flex;justify-content:center;gap:6px;margin-top:24px}
.pagination a,.pagination span{padding:6px 12px;border:1px solid var(--border);border-radius:var(--radius);color:var(--text)}
.pagination a:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.pagination .active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* User panel */
.user-layout{display:grid;grid-template-columns:220px 1fr;gap:24px;margin-top:24px}
.user-sidebar{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px 0;height:fit-content}
.user-sidebar .user-info{padding:0 20px 20px;border-bottom:1px solid var(--border);text-align:center}
.user-avatar{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700;margin:0 auto 10px}
.user-sidebar a{display:block;padding:10px 20px;color:var(--text)}
.user-sidebar a:hover,.user-sidebar a.active{background:var(--primary);color:#fff}
.user-content{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;min-height:400px}

/* Chat */
.chat-layout{display:grid;grid-template-columns:260px 1fr;gap:0;height:600px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.chat-sidebar{border-right:1px solid var(--border);overflow-y:auto}
.chat-sidebar .chat-item{padding:14px 16px;border-bottom:1px solid var(--border);cursor:pointer;display:flex;align-items:center;gap:10px}
.chat-sidebar .chat-item:hover,.chat-sidebar .chat-item.active{background:var(--bg)}
.chat-main{display:flex;flex-direction:column}
.chat-header{padding:14px 20px;border-bottom:1px solid var(--border);font-weight:600}
.chat-messages{flex:1;overflow-y:auto;padding:20px;background:var(--bg)}
.chat-msg{margin-bottom:14px;max-width:70%}
.chat-msg .msg-bubble{padding:10px 14px;border-radius:12px;display:inline-block}
.chat-msg.out .msg-bubble{background:var(--primary);color:#fff}
.chat-msg.in .msg-bubble{background:#fff;box-shadow:var(--shadow)}
.chat-msg .msg-time{font-size:11px;color:var(--gray);margin-top:4px}
.chat-msg.out{text-align:right}
.chat-input{padding:14px 20px;border-top:1px solid var(--border);display:flex;gap:10px}
.chat-input input{flex:1}

/* Misc */
.breadcrumb{padding:16px 0;color:var(--gray);font-size:13px}
.breadcrumb a{color:var(--gray)}
.breadcrumb a:hover{color:var(--primary)}
.empty{text-align:center;padding:60px 20px;color:var(--gray)}
.empty .empty-icon{font-size:48px;margin-bottom:16px;opacity:.4}
.stat-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;text-align:center}
.stat-card .stat-value{font-size:28px;font-weight:700;color:var(--primary)}
.stat-card .stat-label{color:var(--gray);font-size:13px;margin-top:4px}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:24px}
@media(max-width:992px){.product-grid{grid-template-columns:repeat(2,1fr)}.features{grid-template-columns:repeat(2,1fr)}.user-layout{grid-template-columns:1fr}.chat-layout{grid-template-columns:1fr;height:auto}}

/* 汉堡菜单按钮 */
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;border:none;background:none;cursor:pointer;padding:0}
.nav-toggle span{display:block;width:24px;height:3px;background:var(--primary);border-radius:2px;transition:.3s}
.nav-toggle.active span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

@media(max-width:768px){
  .header-top{display:none}
  .nav-toggle{display:flex}
  .header-main .container{flex-wrap:wrap}
  .main-nav{
    display:none;
    flex-direction:column;
    width:100%;
    order:3;
    margin-top:12px;
    gap:0;
  }
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 16px;border-radius:0;border-bottom:1px solid #f0f0f0}
  .main-nav a:hover,.main-nav a.active{background:var(--primary);color:#fff}
  .header-user{order:2}
  .header-user .btn-sm{padding:4px 10px;font-size:12px}
  .logo{font-size:18px}
  .logo .logo-icon{width:32px;height:32px;font-size:16px}
  .footer-grid{grid-template-columns:1fr !important}
  .user-sidebar{position:relative !important}
  .forum-aside,.forum-aside-right,.topic-aside{position:relative !important;top:auto !important}
  .table{display:block;overflow-x:auto;white-space:nowrap}
  .table th,.table td{padding:8px 10px}
}
@media(max-width:600px){.product-grid{grid-template-columns:1fr}.features{grid-template-columns:1fr}.hero h1{font-size:28px}.stat-grid{grid-template-columns:repeat(2,1fr)}.hero-stats{gap:20px}.hero-stats .stat-num{font-size:24px}.footer-grid{grid-template-columns:1fr}.trade-rules{grid-template-columns:1fr}.trade-detail-grid{grid-template-columns:1fr !important}}

/* ==================== 论坛 V2EX/掘金风格 ==================== */
.forum-hero{background:linear-gradient(135deg,#1565c0,#1e88e5 55%,#00acc1);color:#fff;padding:36px 0;position:relative;overflow:hidden}
.forum-hero::before{content:"";position:absolute;right:-100px;top:-100px;width:350px;height:350px;background:rgba(255,255,255,.07);border-radius:50%}
.forum-hero .container{display:flex;justify-content:space-between;align-items:center;position:relative}
.fh-left h1{font-size:28px;margin-bottom:4px}
.fh-left p{opacity:.85;font-size:14px}
.fh-stats{display:flex;gap:20px;margin-top:16px;font-size:13px;opacity:.9}
.fh-stats b{font-size:18px;font-weight:700;margin-right:3px}
.fh-search{display:flex;gap:6px;background:rgba(255,255,255,.15);border-radius:24px;padding:6px 6px 6px 16px;backdrop-filter:blur(4px)}
.fh-search input{background:transparent;border:none;color:#fff;outline:none;font-size:14px;width:200px}
.fh-search input::placeholder{color:rgba(255,255,255,.7)}
.fh-search button{background:#fff;border:none;width:32px;height:32px;border-radius:50%;cursor:pointer;font-size:14px}
.forum-layout{display:grid;grid-template-columns:200px 1fr 260px;gap:20px;margin-top:24px;align-items:start}
.forum-aside{position:sticky;top:80px}
.aside-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:16px}
.aside-title{font-size:14px;font-weight:700;color:var(--dark);margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.aside-nav{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:6px;color:var(--text);font-size:13px;margin-bottom:2px;transition:.15s}
.aside-nav em{margin-left:auto;font-style:normal;background:var(--bg);color:var(--gray);font-size:11px;padding:0 6px;border-radius:8px}
.aside-nav:hover,.aside-nav.active{background:var(--primary);color:#fff}
.aside-nav.active em,.aside-nav:hover em{background:rgba(255,255,255,.25);color:#fff}
.checkin-card .checkin-done{text-align:center;color:var(--success);font-weight:600;margin-bottom:8px}
.checkin-info{text-align:center;font-size:12px;color:var(--gray);margin-top:8px}
.checkin-info b{color:var(--primary)}
.forum-content{min-width:0}
.forum-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.forum-tabs{display:flex;gap:6px;background:#fff;border-radius:var(--radius);padding:4px;box-shadow:var(--shadow)}
.ftab{padding:6px 18px;border-radius:6px;font-size:13px;color:var(--text);font-weight:500}
.ftab.active{background:var(--primary);color:#fff}
.ftab:hover:not(.active){background:var(--bg)}
.post-form{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:16px}
.post-form .pf-row{display:flex;gap:10px;margin-bottom:12px}
.post-form select,.post-form input,.post-form textarea{width:100%;padding:10px;border:1px solid var(--border);border-radius:6px;font-size:14px;font-family:inherit}
.post-form .pf-row select{max-width:160px}
.post-form textarea{resize:vertical;margin-bottom:12px}
.pf-images{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.pf-img-item{position:relative;width:80px;height:80px}
.pf-img-item img{width:100%;height:100%;object-fit:cover;border-radius:6px}
.pf-img-item span{position:absolute;top:-6px;right:-6px;background:var(--danger);color:#fff;width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:12px}
.pf-bottom{display:flex;justify-content:space-between;align-items:center}
.topic-list{display:flex;flex-direction:column;gap:12px}
.topic-card{display:flex;gap:16px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px;transition:.2s}
.topic-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-1px)}
.tc-main{flex:1;min-width:0}
.tc-meta{display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap}
.topic-tag{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:500}
.tag-top{background:#e53935;color:#fff}
.tag-essence{background:#fb8c00;color:#fff}
.tag-cat{background:#e3f2fd;color:var(--primary)}
.tc-title{font-size:16px;font-weight:600;margin-bottom:6px;line-height:1.4}
.tc-title a{color:var(--dark)}
.tc-title a:hover{color:var(--primary)}
.tc-summary{font-size:13px;color:var(--gray);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:10px}
.tc-images{display:flex;gap:8px;margin-bottom:10px}
.tc-img{width:120px;height:90px;object-fit:cover;border-radius:6px;cursor:pointer}
.tc-footer{display:flex;align-items:center;gap:16px;font-size:12px;color:var(--gray)}
.tc-author{display:flex;align-items:center;gap:6px;color:var(--text)}
.tc-author:hover{color:var(--primary)}
.tc-avatar{width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700}
.tc-stats{display:flex;gap:12px;margin-left:auto}
.tc-reply-count{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:var(--bg);color:var(--primary);font-weight:700;font-size:14px;flex-shrink:0}
.hot-item{display:flex;align-items:center;gap:8px;padding:8px 4px;font-size:13px;color:var(--text);border-bottom:1px solid var(--border)}
.hot-item:last-child{border-bottom:none}
.hot-item:hover{color:var(--primary)}
.hot-rank{width:20px;height:20px;border-radius:4px;background:var(--bg);color:var(--gray);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;flex-shrink:0}
.hot-rank.top{background:var(--primary);color:#fff}
.hot-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.active-user{display:flex;align-items:center;gap:10px;padding:8px 4px;border-bottom:1px solid var(--border)}
.active-user:last-child{border-bottom:none}
.au-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex-shrink:0}
.au-info{flex:1;overflow:hidden}
.au-name{display:block;font-size:13px;color:var(--text);font-weight:500}
.au-stat{display:block;font-size:11px;color:var(--gray)}
.au-points{background:#fff3e0;color:var(--warning);font-size:11px;padding:2px 6px;border-radius:8px;font-weight:600}
.aside-tip p{font-size:12px;color:var(--gray);line-height:1.8;margin:0}
.search-header{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:16px}
.search-header h2{font-size:18px;margin-bottom:6px}
.search-header p{font-size:13px;color:var(--gray);margin-bottom:12px}
.search-box{display:flex;gap:8px}
.search-box input{flex:1;padding:8px 12px;border:1px solid var(--border);border-radius:6px}
.search-box button{padding:8px 16px;background:var(--primary);color:#fff;border:none;border-radius:6px;cursor:pointer}
.topic-layout{display:grid;grid-template-columns:1fr 260px;gap:20px;margin-top:24px;align-items:start}
.topic-main{min-width:0}
.topic-detail-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-bottom:20px}
.td-meta{display:flex;gap:6px;margin-bottom:12px}
.td-title{font-size:22px;font-weight:700;color:var(--dark);margin-bottom:16px;line-height:1.4}
.td-info{display:flex;align-items:center;gap:16px;font-size:13px;color:var(--gray);padding-bottom:16px;border-bottom:1px solid var(--border);margin-bottom:16px}
.td-author{display:flex;align-items:center;gap:8px;color:var(--text)}
.td-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.td-content{font-size:15px;line-height:1.8;color:var(--text);white-space:pre-wrap;word-break:break-word}
.td-images{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}
.td-img{max-width:300px;border-radius:8px;cursor:pointer;transition:.2s}
.td-img:hover{opacity:.9}
.td-actions{display:flex;align-items:center;gap:12px;margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}
.td-action{display:flex;align-items:center;gap:6px;padding:8px 16px;border:1px solid var(--border);border-radius:20px;background:#fff;color:var(--text);font-size:13px;cursor:pointer;transition:.15s}
.td-action:hover{border-color:var(--primary);color:var(--primary)}
.td-action.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.td-action.danger:hover{border-color:var(--danger);color:var(--danger)}
.reply-section{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.reply-title{font-size:16px;font-weight:600;margin-bottom:16px}
.reply-item{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--border)}
.reply-floor{width:28px;height:28px;border-radius:50%;background:var(--bg);color:var(--gray);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0}
.reply-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}
.reply-body{flex:1}
.reply-head{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.reply-name{font-weight:600;color:var(--text);font-size:13px}
.reply-time{color:var(--gray);font-size:12px}
.reply-content{font-size:14px;line-height:1.7;color:var(--text);white-space:pre-wrap}
.reply-form{margin-top:20px;padding-top:20px;border-top:1px solid var(--border)}
.reply-form form{display:flex;gap:14px}
.rf-right{flex:1}
.rf-right textarea{width:100%;padding:10px;border:1px solid var(--border);border-radius:6px;resize:vertical;margin-bottom:10px;font-family:inherit}
.topic-aside{position:sticky;top:80px}
.author-card{display:flex;align-items:center;gap:12px;padding:8px 0;color:var(--text)}
.ac-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700}
.ac-info{flex:1}
.ac-name{display:block;font-weight:600}
.ac-stat{display:block;font-size:12px;color:var(--gray)}
.profile-banner{display:flex;align-items:center;gap:20px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-top:24px}
.pb-avatar{width:72px;height:72px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:700;flex-shrink:0}
.pb-info{flex:1}
.pb-info h2{font-size:20px;margin-bottom:6px}
.pb-stat{font-size:13px;color:var(--gray);margin-bottom:4px}
.pb-meta{font-size:12px;color:var(--gray)}
.profile-tabs{display:flex;gap:8px;margin-top:16px;margin-bottom:16px}
.ptab{padding:8px 20px;border-radius:6px;background:#fff;box-shadow:var(--shadow);color:var(--text);font-size:14px}
.ptab.active{background:var(--primary);color:#fff}
#imgViewer{display:none;position:fixed;inset:0;background:rgba(0,0,0,.8);z-index:9999;align-items:center;justify-content:center;cursor:pointer}
#imgViewer img{max-width:90%;max-height:90%;border-radius:8px}
@media(max-width:992px){.forum-layout{grid-template-columns:1fr}.forum-aside,.forum-aside-right{position:static}.topic-layout{grid-template-columns:1fr}.topic-aside{position:static}}
@media(max-width:600px){.forum-hero .container{flex-direction:column;gap:16px}.fh-search input{width:140px}.topic-card{flex-direction:column}.tc-reply-count{align-self:flex-end}.profile-banner{flex-wrap:wrap}}