/* ============================================
   Mobile CSS - China Coal Info (dzdp.net)
   Responsive Mobile-First Design
   ============================================ */

/* Reset & Base */
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html{font-size:16px;-webkit-text-size-adjust:100%;}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;font-size:14px;color:#333;background:#f5f6fa;line-height:1.6;overflow-x:hidden;}
a{text-decoration:none;color:#333;}
a:active{color:#e8551e;}
img{max-width:100%;display:block;}
ul,ol{list-style:none;}
input,select,textarea,button{font-family:inherit;font-size:inherit;border:none;outline:none;-webkit-appearance:none;}
button{cursor:pointer;}

/* Variables */
:root{
  --primary:#1a56a8;
  --primary-dark:#1447a0;
  --accent:#e8551e;
  --accent-dark:#d44818;
  --success:#2da84e;
  --danger:#d4262a;
  --bg:#f5f6fa;
  --card-bg:#fff;
  --border:#e8e8e8;
  --text-primary:#333;
  --text-secondary:#666;
  --text-light:#999;
  --radius:8px;
  --nav-height:48px;
  --header-height:52px;
}

/* Container */
.m-container{max-width:750px;margin:0 auto;padding:0 12px;}
.m-page{max-width:750px;margin:0 auto;min-height:100vh;background:var(--bg);padding-bottom:60px;}

/* Sticky Header */
.m-header{
  position:sticky;top:0;z-index:100;
  background:linear-gradient(135deg,#1a56a8 0%,#1447a0 100%);
  color:#fff;height:var(--header-height);
  display:flex;align-items:center;padding:0 12px;
  box-shadow:0 2px 8px rgba(0,0,0,0.15);
}
.m-header .m-logo{font-size:18px;font-weight:bold;color:#fff;white-space:nowrap;}
.m-header .m-search-bar{
  flex:1;margin:0 12px;height:36px;
  background:rgba(255,255,255,0.2);border-radius:18px;
  display:flex;align-items:center;padding:0 14px;
}
.m-header .m-search-bar input{
  flex:1;background:transparent;color:#fff;font-size:13px;
}
.m-header .m-search-bar input::placeholder{color:rgba(255,255,255,0.6);}
.m-header .m-search-bar .m-search-icon{font-size:16px;color:rgba(255,255,255,0.8);margin-right:6px;}
.m-header .m-search-bar button{background:transparent;color:#fff;font-size:13px;}
.m-header .m-back{
  font-size:22px;color:#fff;padding:0 4px;
  display:flex;align-items:center;cursor:pointer;
}

/* Search Bar Variant (pages without logo) */
.m-header-search{
  position:sticky;top:0;z-index:100;
  background:#fff;height:var(--header-height);
  display:flex;align-items:center;padding:0 12px;gap:10px;
  border-bottom:1px solid var(--border);
}
.m-header-search .m-back{color:#333;font-size:22px;}
.m-header-search .m-title{flex:1;font-size:17px;font-weight:bold;color:#333;text-align:center;}
.m-header-search .m-search-bar{
  flex:1;height:34px;background:#f0f0f0;border-radius:17px;
  display:flex;align-items:center;padding:0 12px;
}
.m-header-search .m-search-bar input{flex:1;background:transparent;font-size:13px;color:#333;}

/* Section Title */
.m-section{margin-bottom:12px;background:#fff;border-radius:var(--radius);overflow:hidden;}
.m-section-hd{
  display:flex;justify-content:space-between;align-items:center;
  padding:12px 14px;border-bottom:1px solid var(--border);
}
.m-section-hd h2{font-size:15px;font-weight:bold;color:#333;display:flex;align-items:center;}
.m-section-hd h2::before{content:'';display:inline-block;width:3px;height:14px;background:var(--accent);border-radius:2px;margin-right:8px;}
.m-section-hd .m-more{font-size:12px;color:var(--text-light);}

/* Cards */
.m-card{
  background:#fff;border-radius:var(--radius);
  padding:12px 14px;margin-bottom:10px;
  box-shadow:0 1px 3px rgba(0,0,0,0.04);
  transition:box-shadow 0.2s;
}
.m-card:active{box-shadow:0 1px 6px rgba(0,0,0,0.1);}

/* Supply/Buy List Card */
.m-info-card{display:block;padding:12px 14px;background:#fff;border-bottom:1px solid #f0f0f0;}
.m-info-card:active{background:#f9f9f9;}
.m-info-card .m-card-top{display:flex;align-items:center;gap:6px;margin-bottom:8px;}
.m-cate-tag{
  background:var(--primary);color:#fff;font-size:11px;
  padding:2px 6px;border-radius:3px;flex-shrink:0;
}
.m-cate-tag-orange{background:var(--accent);}
.m-cate-tag-green{background:var(--success);}
.m-card-title{
  flex:1;font-size:14px;font-weight:600;color:#333;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.m-card-title:active{color:var(--accent);}
.m-tag-hot{background:var(--accent);color:#fff;font-size:10px;padding:1px 4px;border-radius:2px;}
.m-tag-verify{background:var(--success);color:#fff;font-size:10px;padding:1px 4px;border-radius:2px;}
.m-tag-urgent{background:var(--danger);color:#fff;font-size:10px;padding:1px 4px;border-radius:2px;}
.m-card-info{display:flex;flex-wrap:wrap;gap:4px 12px;margin-bottom:6px;}
.m-card-info .m-info-item{font-size:12px;color:var(--text-secondary);}
.m-card-info .m-info-item em{color:#333;font-style:normal;font-weight:600;}
.m-card-bottom{display:flex;justify-content:space-between;align-items:center;}
.m-card-price{font-size:16px;color:var(--accent);font-weight:bold;}
.m-card-price em{font-size:11px;font-weight:normal;color:var(--text-light);}
.m-card-meta{display:flex;gap:8px;font-size:11px;color:var(--text-light);}
.m-card-meta .m-location{color:var(--text-secondary);}

/* Price List */
.m-price-item{
  display:flex;justify-content:space-between;align-items:center;
  padding:12px 14px;border-bottom:1px solid #f0f0f0;background:#fff;
}
.m-price-item:active{background:#f9f9f9;}
.m-price-left{flex:1;}
.m-price-cate{font-size:12px;color:var(--text-secondary);margin-bottom:2px;}
.m-price-origin{font-size:11px;color:var(--text-light);}
.m-price-right{text-align:right;}
.m-price-val{font-size:15px;color:var(--accent);font-weight:bold;}
.m-price-trend{font-size:11px;}
.m-trend-up{color:var(--danger);}
.m-trend-down{color:var(--success);}
.m-trend-flat{color:var(--text-light);}
.m-price-date{font-size:10px;color:var(--text-light);margin-top:2px;}

/* News List */
.m-news-item{
  display:flex;align-items:center;padding:12px 14px;
  border-bottom:1px solid #f0f0f0;background:#fff;
}
.m-news-item:active{background:#f9f9f9;}
.m-news-item .m-news-title{
  flex:1;font-size:14px;color:#333;line-height:1.5;
  overflow:hidden;text-overflow:ellipsis;display:-webkit-box;
  -webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.m-news-item .m-news-date{font-size:11px;color:var(--text-light);flex-shrink:0;margin-left:8px;}

/* Detail Page */
.m-detail-header{background:#fff;padding:14px;margin-bottom:10px;}
.m-detail-title{font-size:18px;font-weight:bold;color:#333;line-height:1.5;margin-bottom:10px;}
.m-detail-meta{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:12px;color:var(--text-light);}
.m-detail-meta span{display:flex;align-items:center;gap:2px;}

.m-detail-section{background:#fff;margin-bottom:10px;border-radius:var(--radius);overflow:hidden;}
.m-detail-section .m-section-hd{padding:10px 14px;background:#f8f8f8;}
.m-detail-section .m-section-bd{padding:12px 14px;}

/* Detail Params Grid */
.m-params-grid{display:flex;flex-wrap:wrap;}
.m-param-cell{
  width:50%;padding:8px 0;display:flex;align-items:center;
  border-bottom:1px solid #f5f5f5;
}
.m-param-cell:nth-child(odd){padding-right:8px;}
.m-param-cell:nth-child(even){padding-left:8px;border-left:1px solid #f5f5f5;}
.m-param-label{font-size:12px;color:var(--text-light);width:70px;flex-shrink:0;text-align:right;margin-right:8px;}
.m-param-value{font-size:13px;color:#333;font-weight:600;flex:1;}
.m-param-value.m-price-text{color:var(--accent);}

/* Price Highlight */
.m-price-highlight{
  display:flex;align-items:center;justify-content:space-between;
  margin:10px 0;padding:12px 14px;
  background:linear-gradient(135deg,#fff5f0 0%,#ffe8d5 100%);
  border-radius:var(--radius);
}
.m-price-highlight .m-ph-label{font-size:13px;color:#666;}
.m-price-highlight .m-ph-value{display:flex;align-items:baseline;gap:3px;}
.m-price-highlight .m-ph-num{font-size:24px;color:var(--accent);font-weight:bold;}
.m-price-highlight .m-ph-unit{font-size:12px;color:var(--text-light);}

/* Call Button */
.m-call-btn{
  display:flex;align-items:center;justify-content:center;gap:6px;
  width:100%;height:44px;background:var(--accent);color:#fff;
  border-radius:22px;font-size:15px;font-weight:bold;margin:10px 0;
}
.m-call-btn:active{background:var(--accent-dark);}

/* Content */
.m-content{padding:10px 0;font-size:14px;line-height:1.8;color:#555;word-break:break-all;}
.m-content img{max-width:100%;height:auto;border-radius:4px;margin:8px 0;}
.m-content p{margin-bottom:10px;}
.m-content h3{font-size:16px;margin:15px 0 8px;}

/* News Nav */
.m-news-nav{padding:10px 0;border-top:1px solid var(--border);margin-top:10px;}
.m-news-nav a,.m-news-nav span{display:block;font-size:13px;color:#555;padding:4px 0;}
.m-news-nav a:active{color:var(--primary);}

/* Related */
.m-related-list li{padding:8px 0;border-bottom:1px solid #f5f5f5;}
.m-related-list li:last-child{border-bottom:none;}
.m-related-list li a{display:flex;justify-content:space-between;align-items:center;}
.m-related-list .m-rel-title{flex:1;font-size:13px;color:#555;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-right:8px;}
.m-related-list .m-rel-price{font-size:12px;color:var(--accent);font-weight:bold;flex-shrink:0;}

/* Filter Bar */
.m-filter{
  display:flex;align-items:center;gap:8px;
  padding:10px 12px;background:#fff;border-bottom:1px solid var(--border);
  overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:nowrap;
}
.m-filter::-webkit-scrollbar{display:none;}
.m-filter-item{
  display:inline-flex;align-items:center;gap:3px;
  padding:5px 12px;background:#f5f5f5;border-radius:16px;
  font-size:12px;color:#666;flex-shrink:0;
}
.m-filter-item:active,.m-filter-item.m-active{background:var(--primary);color:#fff;}
.m-filter-item select{
  background:transparent;border:none;font-size:12px;color:inherit;
  -webkit-appearance:none;padding-right:14px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23999' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right center;
}
.m-filter-item select option{color:#333;}

/* Search Form */
.m-search-form{display:flex;gap:8px;padding:10px 12px;background:#fff;}
.m-search-form input{
  flex:1;height:36px;padding:0 12px;
  border:1px solid var(--border);border-radius:18px;font-size:13px;
}
.m-search-form input:focus{border-color:var(--primary);}
.m-search-form button{
  height:36px;padding:0 20px;background:var(--primary);
  color:#fff;border-radius:18px;font-size:13px;
}

/* Pagination */
.m-pagination{display:flex;justify-content:center;align-items:center;gap:6px;padding:15px 0;}
.m-pagination a,.m-pagination span{
  display:flex;align-items:center;justify-content:center;
  min-width:34px;height:34px;padding:0 8px;
  border:1px solid var(--border);border-radius:4px;
  font-size:13px;color:#555;
}
.m-pagination .current{background:var(--primary);color:#fff;border-color:var(--primary);}
.m-pagination .disabled{color:#ccc;background:#f9f9f9;}

/* Empty */
.m-empty{text-align:center;padding:40px 20px;color:var(--text-light);font-size:14px;}
.m-empty a{color:var(--accent);}

/* Breadcrumb */
.m-breadcrumb{padding:8px 14px;font-size:12px;color:var(--text-light);background:#fff;border-bottom:1px solid var(--border);}
.m-breadcrumb a{color:var(--primary);}

/* Form */
.m-form{background:#fff;border-radius:var(--radius);overflow:hidden;}
.m-form-group{
  display:flex;align-items:flex-start;padding:12px 14px;
  border-bottom:1px solid #f5f5f5;
}
.m-form-group:last-child{border-bottom:none;}
.m-form-label{
  width:85px;flex-shrink:0;font-size:14px;color:#666;
  padding-top:8px;line-height:1.5;
}
.m-form-label .m-required{color:var(--danger);}
.m-form-control{flex:1;}
.m-form-control input,.m-form-control select,.m-form-control textarea{
  width:100%;padding:8px 0;font-size:14px;color:#333;
  border:none;background:transparent;
}
.m-form-control input::placeholder,.m-form-control textarea::placeholder{color:#ccc;}
.m-form-control select{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23999' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right center;padding-right:20px;
}
.m-form-control textarea{min-height:80px;line-height:1.6;}
.m-form-group-column{flex-direction:column;}
.m-form-group-column .m-form-label{width:auto;padding-top:0;margin-bottom:6px;}

/* Buttons */
.m-btn{
  display:flex;align-items:center;justify-content:center;
  height:44px;border-radius:22px;font-size:15px;font-weight:600;
  width:100%;border:none;
}
.m-btn-primary{background:var(--primary);color:#fff;}
.m-btn-primary:active{background:var(--primary-dark);}
.m-btn-accent{background:var(--accent);color:#fff;}
.m-btn-accent:active{background:var(--accent-dark);}
.m-btn-outline{background:#fff;color:var(--primary);border:1px solid var(--primary);}
.m-btn-block{display:block;width:100%;text-align:center;height:44px;line-height:44px;border-radius:22px;font-size:15px;font-weight:600;}
.m-btn-block.m-btn-primary{background:var(--primary);color:#fff;}
.m-btn-block.m-btn-accent{background:var(--accent);color:#fff;}

/* Member Center */
.m-member-header{
  background:linear-gradient(135deg,#1a56a8 0%,#1447a0 100%);
  padding:20px 16px;color:#fff;
}
.m-member-header .m-member-info{display:flex;align-items:center;gap:12px;}
.m-member-avatar{
  width:50px;height:50px;border-radius:50%;
  background:rgba(255,255,255,0.2);display:flex;
  align-items:center;justify-content:center;font-size:20px;color:#fff;
  border:2px solid rgba(255,255,255,0.3);
}
.m-member-name{font-size:17px;font-weight:bold;margin-bottom:2px;}
.m-member-type{font-size:12px;color:rgba(255,255,255,0.7);}
.m-member-stats{display:flex;justify-content:space-around;margin-top:16px;padding-top:16px;border-top:1px solid rgba(255,255,255,0.15);}
.m-member-stat{text-align:center;}
.m-member-stat .m-stat-num{font-size:20px;font-weight:bold;}
.m-member-stat .m-stat-label{font-size:11px;color:rgba(255,255,255,0.7);margin-top:2px;}

.m-menu-list{background:#fff;border-radius:var(--radius);overflow:hidden;margin-bottom:10px;}
.m-menu-item{
  display:flex;align-items:center;padding:14px;
  border-bottom:1px solid #f5f5f5;
}
.m-menu-item:last-child{border-bottom:none;}
.m-menu-item:active{background:#f9f9f9;}
.m-menu-icon{width:28px;text-align:center;font-size:18px;margin-right:10px;}
.m-menu-text{flex:1;font-size:14px;color:#333;}
.m-menu-arrow{color:#ccc;font-size:14px;}

.m-recent-section{margin-bottom:10px;}
.m-recent-section .m-section-hd{padding:10px 14px;}

/* Login/Register */
.m-auth-page{padding:20px 16px;}
.m-auth-logo{text-align:center;margin-bottom:30px;}
.m-auth-logo h1{font-size:22px;color:var(--primary);margin-bottom:4px;}
.m-auth-logo p{font-size:13px;color:var(--text-light);}
.m-auth-form{background:#fff;border-radius:var(--radius);padding:20px 16px;margin-bottom:16px;}
.m-auth-form .m-form-group{border-bottom:1px solid #f5f5f5;padding:10px 0;}
.m-auth-form .m-form-group:last-child{border-bottom:none;}
.m-auth-form .m-form-label{width:75px;}
.m-auth-form .m-form-control input{font-size:15px;padding:8px 0;}
.m-auth-links{display:flex;justify-content:space-between;font-size:13px;}
.m-auth-links a{color:var(--primary);}
.m-auth-type-toggle{display:flex;gap:10px;margin-bottom:16px;}
.m-auth-type-btn{
  flex:1;text-align:center;padding:8px;
  border:1px solid var(--border);border-radius:6px;
  font-size:13px;color:#666;
}
.m-auth-type-btn.m-active{background:var(--primary);color:#fff;border-color:var(--primary);}

/* Bottom Tab Bar */
.m-tabbar{
  position:fixed;bottom:0;left:0;right:0;
  max-width:750px;margin:0 auto;
  display:flex;background:#fff;height:var(--nav-height);
  border-top:1px solid var(--border);z-index:200;
  box-shadow:0 -1px 6px rgba(0,0,0,0.05);
}
.m-tabbar-item{
  flex:1;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:2px;
  color:var(--text-light);font-size:10px;
}
.m-tabbar-item.m-active{color:var(--primary);}
.m-tabbar-icon{font-size:20px;line-height:1;}

/* Publish Button Floating */
.m-fab{
  position:fixed;bottom:60px;right:16px;z-index:150;
  display:flex;flex-direction:column;gap:8px;
}
.m-fab-btn{
  display:flex;align-items:center;justify-content:center;
  width:48px;height:48px;border-radius:50%;
  font-size:24px;color:#fff;box-shadow:0 2px 10px rgba(0,0,0,0.2);
}
.m-fab-supply{background:var(--accent);}
.m-fab-buy{background:var(--primary);}

/* Toast */
.m-toast{
  position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);
  background:rgba(0,0,0,0.75);color:#fff;padding:12px 20px;
  border-radius:8px;font-size:14px;z-index:9999;
  max-width:80%;text-align:center;
  display:none;
}
.m-toast.m-show{display:block;animation:m-fade-in 0.2s;}

/* Cate Navigation Grid */
.m-cate-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:1px;background:#f0f0f0;border-radius:var(--radius);
  overflow:hidden;margin-bottom:12px;
}
.m-cate-grid-item{
  background:#fff;padding:14px 6px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:4px;
}
.m-cate-grid-item:active{background:#f9f9f9;}
.m-cate-grid-icon{font-size:24px;}
.m-cate-grid-text{font-size:12px;color:#666;}

/* Quick Actions */
.m-quick-actions{
  display:grid;grid-template-columns:1fr 1fr;gap:10px;
  margin-bottom:12px;
}
.m-quick-action{
  display:flex;align-items:center;gap:10px;
  padding:14px;border-radius:var(--radius);color:#fff;
}
.m-quick-action:active{opacity:0.85;}
.m-quick-action-supply{background:linear-gradient(135deg,#e8551e 0%,#d44818 100%);}
.m-quick-action-buy{background:linear-gradient(135deg,#1a56a8 0%,#1447a0 100%);}
.m-quick-action .m-qa-icon{font-size:24px;}
.m-quick-action .m-qa-text{font-size:14px;font-weight:bold;}
.m-quick-action .m-qa-sub{font-size:11px;opacity:0.8;}

/* Animations */
@keyframes m-fade-in{from{opacity:0;}to{opacity:1;}}
@keyframes m-slide-up{from{transform:translateY(10px);opacity:0;}to{transform:translateY(0);opacity:1;}}

.m-fade-in{animation:m-fade-in 0.3s;}
.m-slide-up{animation:m-slide-up 0.3s;}

/* Responsive */
@media (min-width:750px){
  .m-tabbar{border-left:1px solid var(--border);border-right:1px solid var(--border);}
}