/* ============================================================
   美国华人汇 — 完整样式 v2.0 (1:1还原 + SEO + 性能)
   ============================================================ */

/* === Reset === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;background:#F0F2F5;color:#1F2937;line-height:1.6;min-height:100vh;display:flex;flex-direction:column}
a{color:#2563EB;text-decoration:none}a:hover{color:#1D4ED8}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit;cursor:pointer}
.req{color:#DC2626}

/* ============ 顶部导航 ============ */
.hdr{background:linear-gradient(135deg,#0F2B4C 0%,#1A3F6F 40%,#2563EB 75%,#6D28D9 100%);color:#fff;padding:0 20px;position:sticky;top:0;z-index:1000;box-shadow:0 2px 8px rgba(0,0,0,.2)}
.hdr-in{max-width:1200px;margin:0 auto;display:flex;align-items:center;height:54px;gap:14px}
.hdr-logo{font-size:20px;font-weight:800;color:#fff!important;white-space:nowrap;flex-shrink:0}
.hdr-slogan{font-size:12px;color:rgba(255,255,255,.6);flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hdr-nav{display:flex;align-items:center;gap:4px;flex-shrink:0}
.hdr-link{color:rgba(255,255,255,.85)!important;font-size:13px;padding:6px 10px;border-radius:4px;transition:background .15s;white-space:nowrap}
.hdr-link:hover,.hdr-link.active{background:rgba(255,255,255,.15);color:#fff!important}
.hdr-post{background:rgba(255,255,255,.2)!important;font-weight:600}
.hdr-post:hover{background:rgba(255,255,255,.3)!important}
.hdr-auth{display:flex;align-items:center;gap:8px;font-size:13px}
.hdr-auth a{color:rgba(255,255,255,.85)!important;font-size:13px}
.nav-username{color:#FDE68A!important;font-weight:600}
.nav-admin-link{color:#93C5FD!important}
.nav-logout{color:rgba(255,255,255,.6)!important;cursor:pointer}
.nav-logout:hover{color:#FCA5A5!important}
.hdr-menu{display:none;background:none;border:none;color:#fff;font-size:24px}

/* ============ 汇率条 ============ */
.rate-strip{background:linear-gradient(90deg,#0D2137,#1A3F6F);color:#FDE68A;padding:6px 20px;font-size:13px;text-align:center}
.rate-strip-in{max-width:1200px;margin:0 auto}

/* ============ 搜索条 ============ */
.search-strip{background:#fff;padding:14px 20px;border-bottom:1px solid #E5E7EB}
.search-strip-in{max-width:1200px;margin:0 auto;display:flex;gap:8px}
.search-ipt{flex:1;padding:10px 16px;border:2px solid #D1D5DB;border-radius:8px;font-size:15px;outline:none;transition:border-color .2s}
.search-ipt:focus{border-color:#2563EB;box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.search-btn{padding:10px 28px;background:#2563EB;color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:600;white-space:nowrap;transition:background .15s}
.search-btn:hover{background:#1D4ED8}

/* ============ 公告条 ============ */
.ann-strip{background:#FFF8E1;padding:8px 20px;border-bottom:1px solid #FFE082}
.ann-strip-in{max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:12px;font-size:13px}
.ann-tag{background:#F59E0B;color:#fff;padding:2px 10px;border-radius:4px;font-weight:700;font-size:12px;flex-shrink:0}
.ann-txt{color:#92400E;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ann-post{color:#2563EB!important;font-weight:700;flex-shrink:0;white-space:nowrap}

/* ============ 分类网格 5列 ============ */
.cat-sec{background:#fff;padding:20px;border-bottom:1px solid #E5E7EB}
.cat-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.cat-card{display:flex;flex-direction:column;align-items:center;text-align:center;padding:16px 8px 12px;border-radius:10px;background:#F9FAFB;border:1px solid #F3F4F6;text-decoration:none!important;color:#1F2937!important;transition:all .2s}
.cat-card:hover{background:#fff;box-shadow:0 4px 16px rgba(0,0,0,.1);transform:translateY(-2px);border-color:#D1D5DB}
.cat-ic{font-size:32px;line-height:1;margin-bottom:6px}
.cat-nm{font-size:14px;font-weight:700;margin-bottom:6px}
.cat-sub{display:flex;flex-wrap:wrap;justify-content:center;gap:2px 8px}
.cat-sub span{font-size:11px;color:#9CA3AF;line-height:1.6;white-space:nowrap}

/* ============ 广告横幅 ============ */
.ad-bar{background:linear-gradient(90deg,#FEF3C7,#FDE68A,#FEF3C7);padding:8px 20px;text-align:center;font-size:13px;color:#92400E;border-bottom:1px solid #F59E0B;overflow:hidden}
.ad-bar-in{white-space:nowrap;animation:adScroll 22s linear infinite}
@keyframes adScroll{0%{transform:translateX(100%)}100%{transform:translateX(-100%)}}

/* ============ 主区域 ============ */
.main{flex:1;padding:20px}
.main-in{max-width:1200px;margin:0 auto}
.home-sec{margin-bottom:20px}

/* Section Bar */
.sec-bar{display:flex;align-items:center;justify-content:space-between;padding:10px 0;margin-bottom:8px;border-bottom:2px solid #1E40AF}
.sec-title{font-size:16px;font-weight:700;color:#1E40AF}
.sec-more{font-size:13px;color:#6B7280}.sec-more:hover{color:#2563EB}

/* ★好趣推荐 横向3列 */
.fun-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.fun-card{background:#fff;border-radius:8px;padding:14px 16px;box-shadow:0 1px 4px rgba(0,0,0,.06);border-left:3px solid #0277BD;text-decoration:none!important;color:#1F2937!important;transition:box-shadow .2s}
.fun-card:hover{box-shadow:0 4px 12px rgba(0,0,0,.12)}
.fun-card-tt{font-size:14px;font-weight:500;line-height:1.5;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.fun-card-mt{font-size:11px;color:#9CA3AF}

/* 全部最新 */
.latest-box{background:#fff;border-radius:10px;box-shadow:0 1px 4px rgba(0,0,0,.06);overflow:hidden}
.latest-card{display:flex;gap:14px;padding:16px;border-bottom:1px solid #F3F4F6;text-decoration:none!important;color:inherit!important;transition:background .15s}
.latest-card:hover{background:#F9FAFB}.latest-card:last-child{border-bottom:none}
.latest-card-body{flex:1;min-width:0}
.latest-card-cat{display:inline-block;font-size:12px;font-weight:600;padding:2px 8px;border-radius:3px;margin-bottom:6px}
.latest-card-title{font-size:15px;font-weight:600;color:#1F2937;margin-bottom:4px;line-height:1.4}
.latest-card-price{font-size:15px;font-weight:700;color:#DC2626;margin-bottom:4px}
.latest-card-desc{font-size:13px;color:#6B7280;line-height:1.5;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.latest-card-footer{display:flex;gap:12px;font-size:12px;color:#9CA3AF}
.latest-thumb{width:120px;height:90px;border-radius:6px;overflow:hidden;flex-shrink:0;background:#F3F4F6}
.latest-thumb img{width:100%;height:100%;object-fit:cover}
.pin-badge{display:inline-block;background:#FEF3C7;color:#D97706;font-size:11px;padding:1px 6px;border-radius:3px;font-weight:500;margin-right:4px}

/* 双列布局 */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}
.col-l,.col-r{display:flex;flex-direction:column;gap:16px}

/* 矩阵块 */
.mx-blk{background:#fff;border-radius:10px;box-shadow:0 1px 4px rgba(0,0,0,.06);overflow:hidden}
.mx-hd{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-left:4px solid #E5E7EB;background:#FAFAFA;border-bottom:1px solid #F3F4F6}
.mx-tt{font-size:14px;font-weight:600;color:#1F2937}
.mx-more{font-size:12px;color:#6B7280}.mx-more:hover{color:#2563EB}
.mx-list{padding:0}
.mx-item{display:flex;justify-content:space-between;align-items:center;padding:9px 14px;border-bottom:1px solid #F9FAFB;text-decoration:none!important;color:#1F2937!important;transition:background .15s;gap:8px}
.mx-item:last-child{border-bottom:none}.mx-item:hover{background:#F9FAFB}
.mx-item-body{flex:1;min-width:0;overflow:hidden}
.mx-item-tt{font-size:13px;line-height:1.4;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mx-item-mt{font-size:11px;color:#9CA3AF;margin-top:2px}
.mx-item-price{font-size:13px;font-weight:700;color:#DC2626;white-space:nowrap;flex-shrink:0}

/* ============ 信息列表页 ============ */
.pg-title{font-size:22px;font-weight:700;margin-bottom:16px;color:#1F2937}
.ls-card{background:#fff;border-radius:10px;box-shadow:0 1px 4px rgba(0,0,0,.06);margin-bottom:12px;overflow:hidden;transition:box-shadow .2s}
.ls-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.1)}
.ls-card>a{display:flex;padding:14px;text-decoration:none!important;color:inherit!important;gap:14px}
.ls-img{width:120px;height:90px;border-radius:6px;overflow:hidden;flex-shrink:0;background:#F3F4F6}
.ls-img img{width:100%;height:100%;object-fit:cover}
.ls-info{flex:1;min-width:0;overflow:hidden}
.ls-title{font-size:15px;font-weight:600;color:#1F2937;margin-bottom:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ls-price{font-size:15px;font-weight:700;color:#DC2626;margin-bottom:4px}
.ls-meta{display:flex;gap:12px;font-size:12px;color:#9CA3AF;margin-bottom:6px;flex-wrap:wrap}
.ls-cat{font-weight:600}
.ls-desc{font-size:13px;color:#6B7280;line-height:1.5;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}

/* ============ 详情页 ============ */
.dt-wrap{background:#fff;border-radius:12px;padding:24px;box-shadow:0 1px 4px rgba(0,0,0,.06);margin-bottom:20px}
.dt-title{font-size:22px;font-weight:700;color:#1F2937;margin-bottom:12px;line-height:1.4}
.dt-meta{display:flex;gap:16px;font-size:13px;color:#6B7280;margin-bottom:20px;flex-wrap:wrap;padding-bottom:16px;border-bottom:1px solid #F3F4F6}
.dt-price{font-size:20px;font-weight:700;color:#DC2626;margin-bottom:16px}
.dt-imgs{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px;margin-bottom:20px}
.dt-img{border-radius:8px;overflow:hidden;cursor:pointer;aspect-ratio:4/3;background:#F3F4F6}
.dt-img img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.dt-img:hover img{transform:scale(1.05)}
.dt-body{font-size:15px;line-height:1.8;color:#374151;margin-bottom:20px;white-space:pre-wrap;word-break:break-word}
.dt-contact{background:#F0FDF4;border:1px solid #BBF7D0;border-radius:10px;padding:16px;margin-bottom:20px}
.dt-contact h3{font-size:15px;margin-bottom:10px;color:#166534}
.dt-contact p{font-size:14px;color:#374151;margin-bottom:4px}

/* 图片预览 */
.img-ov{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.88);z-index:9999;display:flex;align-items:center;justify-content:center;cursor:pointer}
.img-ov img{max-width:92%;max-height:92%;object-fit:contain;border-radius:4px}
.img-ov-close{position:absolute;top:20px;right:30px;font-size:36px;color:#fff;cursor:pointer}

/* ============ 评论区 ============ */
.cmt-wrap{background:#fff;border-radius:12px;padding:24px;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.cmt-wrap h3{font-size:17px;font-weight:600;margin-bottom:16px}
.cmt-form textarea{width:100%;padding:12px;border:1px solid #D1D5DB;border-radius:8px;font-size:14px;font-family:inherit;resize:vertical;outline:none;margin-bottom:4px}
.cmt-form textarea:focus{border-color:#2563EB;box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.cmt-item{padding:12px 0;border-bottom:1px solid #F3F4F6}
.cmt-item:last-child{border-bottom:none}
.cmt-head{display:flex;justify-content:space-between;margin-bottom:6px}
.cmt-author{font-size:13px;font-weight:600}
.cmt-time{font-size:12px;color:#9CA3AF}
.cmt-body{font-size:14px;color:#374151;line-height:1.6}
.login-hint{padding:12px;background:#FEF3C7;border-radius:8px;font-size:13px;color:#92400E;margin-bottom:16px}

/* ============ 认证页 ============ */
.auth-card{max-width:420px;margin:60px auto;background:#fff;border-radius:12px;padding:32px;box-shadow:0 4px 20px rgba(0,0,0,.08)}
.auth-title{font-size:22px;font-weight:700;text-align:center;margin-bottom:24px}
.auth-field{margin-bottom:16px}
.auth-field label{display:block;font-size:13px;font-weight:500;color:#374151;margin-bottom:6px}
.auth-field input{width:100%;padding:10px 14px;border:1px solid #D1D5DB;border-radius:8px;font-size:15px;outline:none}
.auth-field input:focus{border-color:#2563EB;box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.auth-error{color:#DC2626;font-size:13px;min-height:20px;margin-bottom:8px}
.auth-link{text-align:center;font-size:13px;color:#6B7280;margin-top:16px}

/* 验证码 */
.captcha-row .captcha-wrap{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.captcha-q{display:inline-block;padding:8px 16px;background:#EFF6FF;border:1px solid #BFDBFE;border-radius:6px;font-size:16px;font-weight:700;color:#1E40AF;letter-spacing:2px;min-width:120px;text-align:center}
.captcha-refresh{background:none;border:1px solid #D1D5DB;border-radius:6px;padding:6px 10px;font-size:16px;cursor:pointer}
.captcha-refresh:hover{background:#F3F4F6}

/* ============ 发布表单 ============ */
.form-box{max-width:720px;margin:0 auto;background:#fff;border-radius:12px;padding:28px;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.form-title{font-size:20px;font-weight:700;margin-bottom:20px}
.fg{margin-bottom:16px}
.fg label{display:block;font-size:13px;font-weight:500;color:#374151;margin-bottom:6px}
.fi,.fi-sel,.fi-ta{width:100%;padding:10px 14px;border:1px solid #D1D5DB;border-radius:8px;font-size:14px;font-family:inherit;outline:none;background:#fff}
.fi:focus,.fi-sel:focus,.fi-ta:focus{border-color:#2563EB;box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.fi-ta{resize:vertical;min-height:100px}
.fg-row{display:flex;gap:12px}
.fg-half{flex:1}
.form-sec-title{font-size:15px;font-weight:600;margin:20px 0 12px;padding-top:16px;border-top:1px solid #F3F4F6}
.form-hint{font-size:13px;min-height:20px;margin-bottom:8px;color:#DC2626}
.form-note{font-size:13px;color:#6B7280;margin-top:12px;text-align:center}
.upload-btn{padding:8px 20px;background:#F3F4F6;border:2px dashed #D1D5DB;border-radius:8px;font-size:14px;color:#6B7280}
.upload-btn:hover{background:#E5E7EB;border-color:#9CA3AF}
.upload-grid{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.up-img{width:80px;height:80px;border-radius:6px;overflow:hidden;position:relative;border:1px solid #E5E7EB}
.up-img img{width:100%;height:100%;object-fit:cover}
.up-img-rm{position:absolute;top:2px;right:2px;width:20px;height:20px;background:rgba(220,38,38,.85);color:#fff;border:none;border-radius:50%;font-size:14px;line-height:20px;text-align:center;padding:0}

/* ============ 通用按钮 ============ */
.submit-btn{display:block;width:100%;padding:12px;background:linear-gradient(135deg,#2563EB,#7C3AED);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600}
.submit-btn:hover{opacity:.92}
.submit-btn:disabled{opacity:.5;cursor:not-allowed}

/* ============ 分页 ============ */
.pagi{display:flex;justify-content:center;align-items:center;gap:6px;padding:20px 0}
.pagi-btn{padding:6px 12px;background:#fff;border:1px solid #D1D5DB;border-radius:6px;font-size:13px;text-decoration:none!important;color:#374151!important}
.pagi-btn:hover{background:#F3F4F6}
.pagi-act{background:#2563EB!important;color:#fff!important;border-color:#2563EB!important}
.pagi-info{font-size:13px;color:#6B7280}

/* ============ 状态 ============ */
.ld{padding:30px;text-align:center;color:#6B7280;font-size:14px}
.empty{padding:30px;text-align:center;color:#9CA3AF;font-size:14px}
.err{padding:30px;text-align:center;color:#DC2626;font-size:14px}

/* ============ 管理后台 ============ */
.adm-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-bottom:20px}
.stat-card{background:#fff;border-radius:10px;padding:16px;text-align:center;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.stat-warn{background:#FEF3C7}
.stat-num{font-size:28px;font-weight:700;color:#1F2937}
.stat-label{font-size:13px;color:#6B7280;margin-top:4px}
.adm-tabs{display:flex;gap:4px;margin-bottom:16px;border-bottom:2px solid #E5E7EB;overflow-x:auto}
.adm-tab{padding:10px 20px;background:none;border:none;font-size:14px;font-weight:500;color:#6B7280;border-bottom:2px solid transparent;margin-bottom:-2px;white-space:nowrap}
.adm-tab.active{color:#1D4ED8;border-bottom-color:#1D4ED8}
.adm-content{background:#fff;border-radius:10px;padding:16px;box-shadow:0 1px 4px rgba(0,0,0,.06);overflow-x:auto}
.tbl-wrap{overflow-x:auto}
.tbl{width:100%;border-collapse:collapse;font-size:13px;min-width:700px}
.tbl th{background:#F9FAFB;padding:10px 12px;text-align:left;font-weight:600;border-bottom:2px solid #E5E7EB;white-space:nowrap}
.tbl td{padding:10px 12px;border-bottom:1px solid #F3F4F6;vertical-align:middle}
.tbl tr:hover{background:#F9FAFB}
.act-btns{display:flex;gap:4px;flex-wrap:wrap}
.btn-sm{padding:4px 10px;border:1px solid #D1D5DB;border-radius:4px;font-size:12px;background:#fff;white-space:nowrap}
.btn-ok{color:#059669!important;border-color:#A7F3D0!important;background:#F0FDF4!important}
.btn-warn{color:#D97706!important;border-color:#FDE68A!important;background:#FFFBEB!important}
.btn-pin{color:#7C3AED!important;border-color:#DDD6FE!important;background:#F5F3FF!important}
.btn-del{color:#DC2626!important;border-color:#FECACA!important;background:#FEF2F2!important}
.st-ok{color:#059669;font-weight:500}
.st-wait{color:#D97706;font-weight:500}
.st-no{color:#DC2626;font-weight:500}

/* ============ 底部 ============ */
.ftr{background:#1F2937;color:#9CA3AF;padding:20px;text-align:center;font-size:13px;margin-top:auto}
.ftr a{color:#93C5FD}

/* ============ 响应式 ============ */
@media(max-width:768px){
  .hdr-in{height:auto;padding:10px 0;flex-wrap:wrap;justify-content:center}
  .hdr-slogan{display:none}
  .hdr-nav{display:none;flex-direction:column;width:100%;gap:2px;padding:8px 0;border-top:1px solid rgba(255,255,255,.1)}
  .hdr-nav.open{display:flex}
  .hdr-link{text-align:center;padding:10px}
  .hdr-menu{display:block;position:absolute;right:16px;top:14px}
  .hdr-in{position:relative}
  .search-strip-in{flex-direction:column}
  .ann-strip-in{flex-wrap:wrap;gap:6px;justify-content:center}
  .cat-grid{grid-template-columns:repeat(3,1fr);gap:8px}
  .cat-sub{display:none}
  .cat-ic{font-size:24px}
  .cat-nm{font-size:12px}
  .fun-grid{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr}
  .fg-row{flex-direction:column;gap:0}
  .latest-card{flex-direction:column}
  .latest-thumb{width:100%;height:180px}
  .ls-card>a{flex-direction:column}
  .ls-img{width:100%;height:180px}
  .dt-wrap{padding:16px}
  .auth-card{margin:30px 16px;padding:24px 20px}
}
@media(max-width:480px){
  .cat-grid{grid-template-columns:repeat(3,1fr);gap:6px}
  .cat-ic{font-size:22px}
}