/* ============================================================
 *  现代模板覆盖层 · 「青墨」主题
 *  专利交易平台的现代视觉：青瓷墨蓝主色 + 暖米底 + 琥珀点缀
 *  覆盖 classic style.css 的基础类，并强化 PC/手机自适应。
 * ============================================================ */

:root{
  --mk-teal:#0e4a5e;        /* 青瓷墨蓝（主色） */
  --mk-teal-2:#16707f;      /* 青绿（辅助/渐变） */
  --mk-teal-deep:#0b3b4d;   /* 黛（深） */
  --mk-teal-soft:#e6f0f2;   /* 青蓝浅底 */
  --mk-amber:#e8a33d;       /* 琥珀（CTA/强调） */
  --mk-amber-2:#d18a1f;
  --mk-amber-soft:#fdf4e3;
  --mk-bg:#f6f5f1;          /* 暖米灰底 */
  --mk-ink:#1c2430;         /* 墨黛文字 */
  --mk-muted:#64707c;
  --mk-line:#e6e4de;        /* 暖线 */
  --mk-white:#ffffff;
  --mk-radius:14px;
  --mk-shadow:0 2px 12px rgba(14,74,94,.08);
  --mk-shadow-hover:0 16px 40px rgba(14,74,94,.16);
  /* 兼容 classic 金色变量（modern 覆盖层也需可用，避免 btn-wx 等失色） */
  --gold:#e8a33d;
  --gold-2:#d18a1f;
  --gold-light:#fdf4e3;
  --gold-soft:#fdf4e3;
}

/* ═══════════════ 全局底色 ═══════════════ */
body{
  background:var(--mk-bg);
  color:var(--mk-ink);
  -webkit-font-smoothing:antialiased;
}
.container{max-width:1200px}

/* ═══════════════ 顶部导航 ═══════════════ */
.site-header.modern-header{
  background:#fff;
  border-bottom:1px solid var(--mk-line);
  box-shadow:0 1px 0 rgba(14,74,94,.04),0 6px 24px rgba(14,74,94,.05);
  color:var(--mk-ink);
  backdrop-filter:saturate(180%) blur(10px);
}
.modern-header .header-inner{height:68px;gap:24px}
.modern-logo{color:var(--mk-ink);font-size:21px;font-weight:800;letter-spacing:.5px}
.modern-logo .logo-mark{
  background:linear-gradient(135deg,var(--mk-teal),var(--mk-teal-2));
  color:#fff;border-radius:10px;
}
.modern-nav a{color:var(--mk-muted);font-size:15px;font-weight:500;padding:8px 14px;border-radius:9px;transition:.2s}
.modern-nav a:hover{color:var(--mk-teal);background:var(--mk-teal-soft)}
.modern-nav a.active{color:var(--mk-teal);font-weight:700;background:var(--mk-teal-soft)}
.modern-cta{
  background:var(--mk-amber);color:#fff;font-weight:700;
  box-shadow:0 4px 16px rgba(232,163,61,.35);
}
.modern-cta:hover{background:var(--mk-amber-2)}
.cart-ico{background:var(--mk-teal-soft);color:var(--mk-teal)}
.cart-ico:hover{background:var(--mk-teal);color:#fff}
.cart-ico svg{fill:currentColor}
.cart-badge{background:var(--mk-amber);color:#fff;border-color:#fff}
.menu-toggle{color:var(--mk-ink)}

/* ═══════════════ Hero ═══════════════ */
.hero.modern-hero{
  background:
    radial-gradient(900px 420px at 82% -20%,rgba(255,255,255,.14),transparent 55%),
    radial-gradient(700px 400px at 8% 120%,rgba(22,112,127,.5),transparent 60%),
    linear-gradient(150deg,var(--mk-teal-deep) 0%,var(--mk-teal) 55%,var(--mk-teal-2) 100%);
  color:#fff;padding:58px 0 62px;position:relative;overflow:hidden;
}
.hero.modern-hero::after{
  content:"";position:absolute;right:-120px;bottom:-120px;width:340px;height:340px;
  border:1px solid rgba(255,255,255,.14);border-radius:50%;
  box-shadow:0 0 0 48px rgba(255,255,255,.04),0 0 0 96px rgba(255,255,255,.03);
  pointer-events:none;
}
.hero.modern-hero .container{position:relative;z-index:1}
.hero.modern-hero h1{font-size:34px;font-weight:800;letter-spacing:.5px;margin-bottom:12px}
.hero.modern-hero p{font-size:16px;opacity:.92;margin-bottom:28px;font-weight:400}
.modern-search{
  background:#fff;border-radius:16px;overflow:hidden;
  box-shadow:0 16px 44px rgba(11,59,77,.28);max-width:600px;
  transition:box-shadow .25s ease;
}
.modern-search:focus-within{box-shadow:0 20px 52px rgba(11,59,77,.38)}
.modern-search input{padding:16px 24px;font-size:16px;color:var(--mk-ink)}
.modern-search input::placeholder{color:#9aa5ad}
.modern-search button{
  background:var(--mk-amber);color:#fff;padding:0 36px;font-weight:700;font-size:16px;
  letter-spacing:2px;transition:.2s;
}
.modern-search button:hover{background:var(--mk-amber-2)}

/* ═══════════════ 快速标签 ═══════════════ */
.modern-quick{margin:22px 0}
.modern-quick .quick-tag{
  background:#fff;color:var(--mk-teal);border:1px solid var(--mk-line);
  box-shadow:var(--mk-shadow);border-radius:999px;padding:9px 20px;font-size:14px;
  transition:.2s;
}
.modern-quick .quick-tag:hover{background:var(--mk-teal);color:#fff;border-color:var(--mk-teal)}

/* ═══════════════ 区块标题 ═══════════════ */
.modern-section .section-head{margin-bottom:20px}
.modern-section .section-head h2{font-size:22px;font-weight:800;color:var(--mk-ink);padding-left:14px}
.modern-section .section-head h2::before{width:4px;background:var(--mk-amber);border-radius:2px}
.modern-section .section-head .more{color:var(--mk-teal);font-weight:600;font-size:14px}
.modern-section .section-head .more:hover{color:var(--mk-amber)}

/* ═══════════════ 专利卡片 ═══════════════ */
.modern-card{
  background:#fff;border:1px solid var(--mk-line);border-radius:16px;
  box-shadow:var(--mk-shadow);transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
  overflow:hidden;
}
.modern-card:hover{
  transform:translateY(-5px);box-shadow:var(--mk-shadow-hover);
  border-color:#cfe0e6;
}
.modern-card .card-img{aspect-ratio:4/2.4;background:var(--mk-teal-soft)}
.modern-card .card-tag{
  background:var(--mk-teal);color:#fff;border-radius:6px;
  padding:3px 10px;font-size:12px;font-weight:700;letter-spacing:.3px;
}
.modern-card .card-tag.type-fm{background:#2d6a4f}
.modern-card .card-tag.type-sy{background:var(--mk-teal)}
.modern-card .card-tag.type-wg{background:#8a7b4d}
.modern-card .card-body{padding:14px 14px 14px}
.modern-card .card-title{font-size:15px;font-weight:600;color:var(--mk-ink);line-height:1.5}
.modern-card .card-no{color:var(--mk-muted);font-size:12px}
/* 4列卡片按钮横排，间距紧凑 */
.modern-grid .card-actions{gap:8px}
.modern-grid .card-btn{font-size:12.5px;padding:6px 8px;white-space:nowrap}
.modern-card .status-badge{background:var(--mk-teal-soft);color:var(--mk-teal)}
.modern-card .status-badge.status-ok{background:#e5f2e9;color:#2d6a4f}
.modern-card .gx-badge{background:var(--mk-amber-soft);color:var(--mk-amber-2)}
.modern-card .card-btn{border-radius:999px;font-size:13px;font-weight:600}
.modern-card .card-btn.buy{
  background:linear-gradient(135deg,var(--mk-amber),var(--mk-amber-2));color:#fff;
  box-shadow:0 4px 12px rgba(232,163,61,.3);
}
.modern-card .card-btn.buy:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(232,163,61,.4)}
.modern-card .card-btn.ask{background:var(--mk-teal-soft);color:var(--mk-teal);border:1px solid transparent}
.modern-card .card-btn.ask:hover{background:var(--mk-teal);color:#fff}
/* 卡片角标 */
.modern-card .card-badge.gao{background:var(--mk-teal)}
.modern-card .card-badge.special{background:var(--mk-amber)}
.modern-card .card-badge.deposit{background:#c0392b}

/* ═══════════════ 保障四宫格 ═══════════════ */
.modern-guarantee{margin:36px 0}
.modern-guarantee .g-item{
  background:#fff;border:1px solid var(--mk-line);border-radius:16px;
  box-shadow:var(--mk-shadow);padding:24px 18px;transition:.25s;
}
.modern-guarantee .g-item:hover{transform:translateY(-3px);box-shadow:var(--mk-shadow-hover)}
.modern-guarantee .g-item .ico{
  width:52px;height:52px;margin:0 auto 12px;display:flex;align-items:center;justify-content:center;
  font-size:24px;border-radius:14px;background:var(--mk-teal-soft);
}
.modern-guarantee .g-item h3{font-size:15px;font-weight:700;color:var(--mk-ink)}
.modern-guarantee .g-item p{font-size:12px;color:var(--mk-muted);line-height:1.6}

/* ═══════════════ 需求表单 ═══════════════ */
.modern-lead{
  background:#fff;border:1px solid var(--mk-line);border-radius:20px;
  box-shadow:var(--mk-shadow);padding:32px 34px;position:relative;overflow:hidden;
}
.modern-lead::before{
  content:"";position:absolute;left:0;top:0;right:0;height:5px;
  background:linear-gradient(90deg,var(--mk-teal),var(--mk-teal-2),var(--mk-amber));
}
.modern-lead .lead-left h2{font-size:22px;font-weight:800;color:var(--mk-ink)}
.modern-lead .lead-left p{color:var(--mk-muted)}
.modern-lead .lead-features span{background:var(--mk-teal-soft);color:var(--mk-teal);font-weight:600}
.modern-lead .lead-form input{
  background:#fff;border:1px solid var(--mk-line);border-radius:10px;padding:13px 15px;
  transition:.2s;color:var(--mk-ink);
}
.modern-lead .lead-form input:focus{border-color:var(--mk-teal);box-shadow:0 0 0 3px rgba(14,74,94,.1)}
.modern-lead .lead-form .submit{
  background:linear-gradient(135deg,var(--mk-teal),var(--mk-teal-2));color:#fff;
  font-weight:700;border-radius:10px;
}
.modern-lead .lead-form .submit:hover{background:linear-gradient(135deg,var(--mk-teal-deep),var(--mk-teal))}
.modern-lead .form-error{font-size:13px;min-height:18px}

/* ═══════════════ 列表页头部 ═══════════════ */
.modern-list-head{
  background:linear-gradient(150deg,var(--mk-teal-deep),var(--mk-teal) 60%,var(--mk-teal-2));
  color:#fff;padding:36px 0;margin-bottom:24px;position:relative;overflow:hidden;
}
.modern-list-head::after{
  content:"";position:absolute;left:-60px;bottom:-80px;width:220px;height:220px;border:1px solid rgba(255,255,255,.12);border-radius:50%;
}
.modern-list-head h1{font-size:25px;font-weight:800;margin-bottom:6px;position:relative;z-index:1}
.modern-list-sub{font-size:14px;opacity:.9;position:relative;z-index:1}
.modern-list-sub b{font-size:17px;color:var(--mk-amber)}

/* ═══════════════ 列表页：左侧筛选 + 右侧网格 ═══════════════ */
.modern-list-wrap{display:grid;grid-template-columns:248px 1fr;gap:24px;padding-bottom:48px;align-items:start}
/* 左侧筛选栏：限制最大高度不超过视口，超出内部滚动，避免底部够不到 */
.modern-filter-side{position:sticky;top:84px;display:flex;flex-direction:column;gap:9px;max-height:calc(100vh - 104px);overflow-y:auto;padding-right:4px;scrollbar-width:thin}
.mfilter-box{
  background:#fff;border:1px solid var(--mk-line);border-radius:14px;padding:12px 13px;
  box-shadow:var(--mk-shadow);flex-shrink:0;
}
.mfilter-box h3{font-size:13px;font-weight:700;color:var(--mk-ink);margin-bottom:8px;display:flex;align-items:center;gap:8px}
.mfilter-box h3::after{content:"";flex:1;height:1px;background:var(--mk-line)}
.mfilter-input{width:100%;padding:8px 11px;border:1px solid var(--mk-line);border-radius:9px;font-size:13px;outline:none;margin-bottom:7px;transition:.2s;background:#fff}
.mfilter-input:focus{border-color:var(--mk-teal);box-shadow:0 0 0 3px rgba(14,74,94,.1)}
.mfilter-btn{width:100%;padding:8px;background:var(--mk-teal);color:#fff;border:none;border-radius:9px;font-size:13px;font-weight:700;cursor:pointer;transition:.2s}
.mfilter-btn:hover{background:var(--mk-teal-2)}
.mfilter-list{list-style:none}
.mfilter-list li{margin:2px 0}
.mfilter-list a{display:block;padding:6px 11px;border-radius:8px;font-size:13px;color:var(--mk-muted);transition:.18s;border:1px solid transparent}
.mfilter-list a:hover{background:var(--mk-teal-soft);color:var(--mk-teal)}
.mfilter-list a.on{background:var(--mk-teal);color:#fff;font-weight:700;border-color:var(--mk-teal)}

/* 右侧列表区 */
.modern-list-main{min-width:0}
.modern-result-bar{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  background:#fff;border:1px solid var(--mk-line);border-radius:12px;padding:13px 18px;
  margin-bottom:18px;font-size:14px;color:var(--mk-muted);flex-wrap:wrap;
}
.modern-result-count b{color:var(--mk-amber);font-size:17px;font-weight:800}
.modern-empty{background:#fff;border:1px solid var(--mk-line);border-radius:16px;padding:64px;text-align:center;color:#a2a9b0}
.modern-pagination{display:flex;justify-content:center;align-items:center;gap:12px;margin-top:28px}
.mpg{
  padding:10px 22px;background:#fff;border:1px solid var(--mk-line);border-radius:10px;
  font-size:14px;color:var(--mk-teal);transition:.2s;font-weight:600;
}
.mpg:hover{border-color:var(--mk-teal);background:var(--mk-teal-soft)}
.mpg-info{font-size:14px;color:var(--mk-muted)}
.modern-grid{grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:1180px){.modern-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:900px){.modern-grid{grid-template-columns:repeat(2,1fr)}}
.modern-lead-inline{margin-top:28px}

/* ═══════════════ 页脚 ═══════════════ */
.modern-footer{background:var(--mk-teal-deep);color:#cdd9de}
.modern-footer .foot-links a{color:#eef2f4}
.modern-footer .disclaimer{color:#9fb2b9}
.modern-footer .copyright{color:#8aa0a8}

/* ═══════════════ 吸底栏 ═══════════════ */
.sticky-bar .s-buy{background:var(--mk-teal)}
.sticky-bar .s-call{background:var(--mk-teal-soft);color:var(--mk-teal)}
.sticky-bar .s-wx{background:#e5f3e9;color:#1f9d55}

/* ═══════════════ 弹窗 ═══════════════ */
.modal{border-top:4px solid var(--mk-teal)}
.modal .submit{background:linear-gradient(135deg,var(--mk-teal),var(--mk-teal-2))}
.modal .submit:hover{background:linear-gradient(135deg,var(--mk-teal-deep),var(--mk-teal))}
.modal .field input:focus,.modal .field textarea:focus{border-color:var(--mk-teal);box-shadow:0 0 0 3px rgba(14,74,94,.1)}
.modal .alt a{color:var(--mk-teal)}
.modal .wx-box .wxid{color:var(--mk-teal)}

/* ═══════════════ 面包屑 ═══════════════ */
.modern-bread a:hover{color:var(--mk-teal)}

/* ═══════════════ 响应式 ═══════════════ */
/* 平板：卡片两列，筛选栏横向 */
@media (max-width:1024px){
  .modern-list-wrap{grid-template-columns:1fr}
  .modern-filter-side{position:static;flex-direction:row;flex-wrap:wrap;gap:12px}
  .mfilter-box{flex:1;min-width:170px}
  .modern-grid{grid-template-columns:repeat(3,1fr);gap:14px}
  .modern-guarantee{grid-template-columns:repeat(2,1fr)}
  .modern-mfilter{display:none}
}
@media (max-width:900px){
  .modern-grid{grid-template-columns:repeat(2,1fr)}
}
/* 手机 */
@media (max-width:768px){
  .modern-header .header-inner{height:60px}
  .modern-nav a{padding:12px 16px;font-size:16px}
  .hero.modern-hero{padding:40px 0 44px}
  .hero.modern-hero h1{font-size:24px}
  .hero.modern-hero p{font-size:15px}
  .modern-search{border-radius:12px}
  .modern-search input{padding:14px 18px;font-size:15px}
  .modern-search button{padding:0 24px;font-size:15px;letter-spacing:1px}
  .modern-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .modern-section .section-head h2{font-size:19px}
  .modern-guarantee{gap:10px;margin:26px 0}
  .modern-guarantee .g-item{padding:18px 14px}
  .modern-lead{padding:22px 18px;border-radius:16px}
  .modern-lead .lead-left h2{font-size:19px}
  .modern-list-head{padding:28px 0}
  .modern-list-head h1{font-size:21px}
  .modern-filter-side{gap:10px}
  .mfilter-box{min-width:calc(50% - 6px)}
  .modern-result-bar{font-size:13px}
  /* 手机端隐藏PC筛选栏，显示移动筛选 */
  .modern-filter-side{display:none}
  .modern-mfilter{display:block}
}
@media (max-width:420px){
  .hero.modern-hero h1{font-size:21px}
  .modern-grid{gap:9px}
  .modern-card .card-title{font-size:14px}
  .modern-quick .quick-tag{font-size:13px;padding:8px 15px}
  .mfilter-box{min-width:100%}
  .mmf-sel-btn{font-size:13px;padding:10px 12px}
}

/* ═══════════════ 移动端筛选（modern-mfilter）下拉选择器 ════════════════ */
.modern-mfilter{background:#fff;border:1px solid var(--mk-line);border-radius:16px;padding:14px;margin-bottom:14px;box-shadow:var(--mk-shadow)}
.modern-mfilter-search{display:flex;gap:8px;margin-bottom:12px}
.modern-mfilter-search input{flex:1;border:1px solid var(--mk-line);border-radius:10px;padding:11px 14px;font-size:14px;outline:none;background:#fff;transition:.2s}
.modern-mfilter-search input:focus{border-color:var(--mk-teal);box-shadow:0 0 0 3px rgba(14,74,94,.1)}
.mmf-btn{flex-shrink:0;background:var(--mk-teal);color:#fff;border:none;border-radius:10px;font-size:14px;font-weight:700;padding:0 22px;letter-spacing:1px;transition:.2s}
.mmf-btn:hover{background:var(--mk-teal-2)}

/* 三个下拉选择器横排 */
.mmf-selects{display:flex;gap:8px}
.mmf-sel-wrap{flex:1;position:relative}
.mmf-sel-btn{
  width:100%;background:#fff;border:1px solid var(--mk-line);border-radius:10px;
  padding:10px 12px;font-size:14px;color:var(--mk-muted);font-weight:500;
  cursor:pointer;transition:.2s;display:flex;align-items:center;justify-content:center;gap:6px;
}
.mmf-sel-btn:hover{border-color:var(--mk-teal);color:var(--mk-teal)}
/* 已选中状态：深色底白字 */
.mmf-sel-btn.selected{background:var(--mk-teal);color:#fff;border-color:var(--mk-teal);font-weight:700}
.mmf-sel-txt{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:160px}
/* 下拉箭头 */
.mmf-arrow{
  width:0;height:0;border-left:4.5px solid transparent;border-right:4.5px solid transparent;
  border-top:5px solid currentColor;flex-shrink:0;transition:transform .25s ease;
}
.mmf-sel-wrap.open .mmf-arrow{transform:rotate(180deg)}

/* 下拉面板 */
.mmf-dropdown{
  display:none;position:absolute;top:calc(100% + 6px);left:0;right:0;
  background:#fff;border:1px solid var(--mk-line);border-radius:12px;
  box-shadow:0 8px 28px rgba(14,74,94,.15);z-index:50;
  padding:6px;min-width:120px;
}
.mmf-sel-wrap.open .mmf-dropdown{display:block}
.mmf-d-item{
  display:block;padding:11px 14px;font-size:14px;color:var(--mk-ink);
  border-radius:8px;transition:.15s;font-weight:500;
}
.mmf-d-item:hover{background:var(--mk-teal-soft);color:var(--mk-teal)}
.mmf-d-item.on{background:var(--mk-teal);color:#fff;font-weight:700}

/* PC end hide mobile filter */
@media (min-width:769px){.modern-mfilter{display:none}}