/* ===== 姐姐的亚欧非漫游指南 · 样式（紫色 × 浅蓝 · 风景主题） ===== */
:root{
  --bg:#f5f2fc;--bg-grad:linear-gradient(180deg,#f5f2fc 0%,#e9f1fb 100%);
  --card:#ffffff;--primary:#7c3aed;--primary-2:#a855f7;--secondary:#3b82f6;--secondary-2:#7dd3fc;
  --danger:#ef4444;--text:#2d2a3d;--text-light:#8a86a0;--border:#e4ddf3;
  --shadow:0 6px 24px rgba(124,58,237,0.10);--radius:16px;
  --visited-bg:#e6f4ff;--chip-hover:#f3eeff;
  --header-grad:linear-gradient(135deg,rgba(88,28,135,0.78),rgba(37,99,235,0.62));
  --sticky-bg:rgba(255,255,255,0.92);
  --hero-h:300px;
}
html[data-theme="dark"]{
  --bg:#151326;--bg-grad:linear-gradient(180deg,#151326 0%,#131b33 100%);
  --card:#1e1b35;--primary:#a78bfa;--primary-2:#c4b5fd;--secondary:#60a5fa;--secondary-2:#38bdf8;
  --danger:#f87171;--text:#e8e6f5;--text-light:#9a94b8;--border:#322e52;
  --shadow:0 6px 24px rgba(0,0,0,0.4);
  --visited-bg:#123050;--chip-hover:#2a2645;
  --header-grad:linear-gradient(135deg,rgba(46,16,101,0.85),rgba(23,37,84,0.7));
  --sticky-bg:rgba(30,27,53,0.94);
}
*{box-sizing:border-box;}
body{background:var(--bg);background-image:var(--bg-grad);background-attachment:fixed;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.6;margin:0;padding-bottom:76px;}
.container{max-width:900px;margin:0 auto;padding:16px;}

/* ---------- Hero 风景轮播 ---------- */
.hero{position:relative;min-height:var(--hero-h);border-radius:var(--radius);overflow:hidden;margin-bottom:20px;box-shadow:var(--shadow);}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1.6s ease;transform:scale(1.05);}
.hero-bg.show{opacity:1;transform:scale(1);}
.hero::before{content:"";position:absolute;inset:0;background:var(--header-grad);z-index:1;}
.hero-content{position:relative;z-index:2;min-height:var(--hero-h);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:white;padding:32px 20px;}
.hero-content h1{margin:0 0 8px;font-size:1.9rem;text-shadow:0 2px 12px rgba(0,0,0,0.35);}
.hero-content p{margin:0;font-size:0.95rem;opacity:0.95;text-shadow:0 1px 8px rgba(0,0,0,0.35);}
#themeToggle{position:absolute;top:14px;right:14px;z-index:3;background:rgba(255,255,255,0.22);border:1px solid rgba(255,255,255,0.35);border-radius:50%;width:42px;height:42px;cursor:pointer;font-size:1.1rem;backdrop-filter:blur(4px);}

/* ---------- Tabs ---------- */
.tabs{display:flex;gap:8px;overflow-x:auto;padding:4px;margin-bottom:16px;}
.tab-btn{flex-shrink:0;padding:10px 18px;border:none;background:var(--card);border-radius:24px;cursor:pointer;font-size:0.9rem;font-weight:600;color:var(--text);box-shadow:var(--shadow);white-space:nowrap;border:1px solid var(--border);transition:all .2s;}
.tab-btn:hover{border-color:var(--primary);color:var(--primary);}
.tab-btn.active{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:white;border-color:transparent;}

/* ---------- 筛选按钮 ---------- */
.filter-btn{padding:6px 14px;border:1px solid var(--border);background:var(--card);border-radius:20px;cursor:pointer;font-size:0.85rem;color:var(--text);transition:all .2s;}
.filter-btn:hover{border-color:var(--secondary);color:var(--secondary);}
.filter-btn.active{background:linear-gradient(135deg,var(--secondary),var(--secondary-2));color:white;border-color:transparent;font-weight:600;}

.section{display:none;}.section.active{display:block;animation:fadeIn 0.3s;}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:translateY(0);}}
.card{background:var(--card);border-radius:var(--radius);padding:16px;margin-bottom:12px;box-shadow:var(--shadow);border:1px solid var(--border);}

/* ---------- 区域标题（真实风景背景） ---------- */
.region-title{font-size:1.15rem;font-weight:700;margin:18px 0 10px;padding:16px 18px;border-radius:14px;color:#fff;text-shadow:0 2px 8px rgba(0,0,0,0.55);background-size:cover;background-position:center;box-shadow:var(--shadow);position:relative;overflow:hidden;}
.region-title::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(88,28,135,0.55),rgba(37,99,235,0.45));}
.region-title span{position:relative;z-index:1;}
.region-title[data-region="出发地"]{background-image:url('https://images.unsplash.com/photo-1470071459604-3b5ec3a7fe05?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="中亚"]{background-image:url('https://images.unsplash.com/photo-1501785888041-af3ef285b470?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="高加索"]{background-image:url('https://images.unsplash.com/photo-1519681393784-d120267933ba?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="土耳其"]{background-image:url('https://images.unsplash.com/photo-1539635278303-d4002c07eae3?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="巴尔干"]{background-image:url('https://images.unsplash.com/photo-1507525428034-b723cf961d3e?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="欧洲"]{background-image:url('https://images.unsplash.com/photo-1533105079780-92b9be482077?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="北非"]{background-image:url('https://images.unsplash.com/photo-1537996194471-e657df975ab4?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="中东"]{background-image:url('https://images.unsplash.com/photo-1518684079-3c830dcef090?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="东北亚"]{background-image:url('https://images.unsplash.com/photo-1519451241324-20b4ea2c4220?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="东非"]{background-image:url('https://images.unsplash.com/photo-1516426122078-c23e76319801?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="南非"]{background-image:url('https://images.unsplash.com/photo-1547471080-7cc2caa01a7e?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="南亚"]{background-image:url('https://images.unsplash.com/photo-1548013146-72479768bada?w=1400&q=80&fm=jpg&fit=crop');}
.region-title[data-region="东南亚"]{background-image:url('https://images.unsplash.com/photo-1524231757912-21f4fe3a7200?w=1400&q=80&fm=jpg&fit=crop');}

/* ---------- 城市网格 ---------- */
.city-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px;}
.city-chip{padding:10px;border-radius:12px;background:var(--card);border:2px solid var(--border);cursor:pointer;text-align:center;font-size:0.85rem;font-weight:600;transition:all .2s;}
.city-chip:hover{background:var(--chip-hover);border-color:var(--primary-2);transform:translateY(-2px);box-shadow:var(--shadow);}
.city-chip.selected{border-color:var(--secondary);background:var(--visited-bg);color:var(--secondary);}

/* ---------- 标签 ---------- */
.tag{display:inline-block;padding:4px 10px;border-radius:20px;font-size:0.75rem;font-weight:600;margin-right:6px;}
.visa-free{background:#d4edda;color:#155724;}.visa-landing{background:#fff3cd;color:#856404;}
.visa-evisa{background:#cce5ff;color:#004085;}.visa-schengen{background:#e2d4f0;color:#4a148c;}
.visa-hard{background:#f8d7da;color:#721c24;}
.trek-box{background:linear-gradient(135deg,#e6f4ff,#dbeafe);border-radius:12px;padding:12px;margin:8px 0;border-left:4px solid var(--secondary);}
.check-item{display:flex;align-items:center;padding:8px 12px;background:var(--card);border-radius:10px;margin-bottom:6px;border:1px solid var(--border);cursor:pointer;transition:background .15s;}
.check-item:hover{background:var(--chip-hover);}
.check-item.checked{opacity:0.6;text-decoration:line-through;background:var(--chip-hover);}
.trip-summary{background:var(--header-grad);color:white;border-radius:var(--radius);padding:20px;margin-bottom:16px;text-align:center;box-shadow:var(--shadow);}
.timeline{position:relative;padding-left:24px;}.timeline::before{content:"";position:absolute;left:8px;top:0;bottom:0;width:2px;background:linear-gradient(180deg,var(--primary),var(--secondary));}
.timeline-item{position:relative;margin-bottom:16px;padding-left:16px;}
.timeline-item::before{content:"";position:absolute;left:-20px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--primary);border:2px solid var(--card);}
.sticky-bar{position:sticky;bottom:0;background:var(--sticky-bg);backdrop-filter:blur(10px);padding:12px 16px;border-top:1px solid var(--border);display:flex;gap:8px;justify-content:center;z-index:100;}
.btn{padding:10px 20px;border:none;border-radius:24px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:white;font-weight:600;cursor:pointer;font-size:0.9rem;box-shadow:var(--shadow);transition:filter .2s;}
.btn:hover{filter:brightness(1.1);}
.btn.small{padding:6px 12px;font-size:0.8rem;}
.tips-table{width:100%;border-collapse:collapse;font-size:0.88rem;}
.tips-table th{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;padding:10px;text-align:left;}
.tips-table td{padding:10px;border-bottom:1px solid var(--border);}
.tips-table tr:hover td{background:var(--chip-hover);}
.visit-btn{background:none;border:1px solid var(--border);border-radius:14px;padding:4px 10px;cursor:pointer;font-size:0.75rem;color:var(--text-light);flex-shrink:0;}
.visit-btn:hover{border-color:var(--secondary);color:var(--secondary);}
.visit-btn.visited{background:var(--visited-bg);color:var(--secondary);border-color:var(--secondary);font-weight:700;}
.visa-table{width:100%;border-collapse:collapse;}
.visa-table th{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;padding:10px;text-align:left;}
.visa-table td{padding:10px;border-bottom:1px solid var(--border);}

@media print{
  :root,html[data-theme="dark"]{
    --bg:#fff;--card:#fff;--primary:#7c3aed;--secondary:#3b82f6;--danger:#ef4444;
    --text:#000;--text-light:#555;--border:#ccc;--shadow:none;
  }
  .tabs,.sticky-bar,.filter-btns,.btn,#citySearch,#themeToggle,input,select,.visit-btn,.hero-bg{display:none!important;}
  .section{display:block!important;page-break-inside:avoid;}
  .card,.city-detail{box-shadow:none;border:1px solid #ccc;}
  .hero{min-height:0;padding:10px;}
  .hero::before{display:none;}
  .region-title{color:#000;text-shadow:none;background:#eee!important;padding:8px;}
  body{background:#fff;color:#000;padding-bottom:0;}
}