/* 城市漫游记 - style.css */
:root{--primary:#2563eb;--primary-light:#60a5fa;--primary-dark:#1d4ed8;--accent:#f59e0b;--bg:#f8fafc;--white:#fff;--text:#1e293b;--text-light:#64748b;--border:#e2e8f0;--radius:12px;--shadow:0 1px 3px rgba(0,0,0,.08);--shadow-md:0 4px 12px rgba(0,0,0,.1)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;color:var(--text);background:var(--bg);line-height:1.6}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto}
h1,h2,h3,h4{line-height:1.3}
h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1.1rem}
.container{max-width:1200px;margin:0 auto;padding:0 16px}

/* Navbar */
.site-header{position:sticky;top:0;left:0;right:0;background:var(--white);border-bottom:1px solid var(--border);z-index:100;padding:0 16px;height:60px;display:flex;align-items:center;box-shadow:var(--shadow)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;width:100%}
.site-header .logo{font-size:1.25rem;font-weight:700;color:var(--primary);white-space:nowrap}
.main-nav{display:flex;gap:20px}
.main-nav a{color:var(--text-light);font-size:.9rem}
.main-nav a:hover,.main-nav a.active{color:var(--primary)}
.menu-toggle{display:none;background:none;border:none;cursor:pointer}

/* Hero */
.hero{background:linear-gradient(135deg,#1e40af,#7c3aed);padding:40px 0 30px 0;text-align:center;color:var(--white)}
.hero-small{padding:30px 0 20px 0}
.hero h1{font-size:2.5rem;margin-bottom:8px}
.hero p{font-size:1.1rem;opacity:.95;margin-bottom:24px}
.hero-inner{position:relative;z-index:2;max-width:1200px;width:100%;margin:0 auto;padding:20px 16px;text-align:center}
.hero h1{font-size:2.5rem;margin-bottom:8px;text-shadow:0 2px 8px rgba(0,0,0,0.3)}
.hero p{font-size:1.1rem;opacity:.95;margin-bottom:24px;text-shadow:0 1px 4px rgba(0,0,0,0.3)}
.search-box{display:flex;max-width:560px;width:100%;background:var(--white);border-radius:50px;overflow:hidden;box-shadow:var(--shadow-md);margin:0 auto}
.search-box input{flex:1;border:none;padding:14px 20px;font-size:1rem;outline:none}
.search-box button{background:var(--primary);color:var(--white);border:none;padding:14px 28px;cursor:pointer;font-size:1rem}
.search-box button:hover{background:var(--primary-dark)}
.hero-tags-wrapper{max-width:1200px;margin:16px auto 0 auto}.hero-tags-wrapper .tag-chips{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.tag-chip{background:rgba(0,0,0,0.3);backdrop-filter:blur(10px);color:var(--white);padding:6px 16px;border-radius:20px;font-size:.85rem;cursor:pointer;transition:background .2s;border:1px solid rgba(255,255,255,0.2)}
.tag-chip:hover,.tag-chip.active{background:rgba(0,0,0,0.5);border-color:rgba(255,255,255,0.4)}

/* Section */
.section{padding:40px 0}
.section-title{font-size:1.5rem;margin-bottom:24px;display:flex;align-items:center;gap:8px}
.section-title .icon{font-size:1.3rem}

/* City Cards Grid */
.city-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.city-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.city-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.city-card .cover{width:100%;height:180px;object-fit:cover;background:#e2e8f0}
.city-card .info{padding:16px}
.city-card .city-name{font-size:1.15rem;font-weight:600;margin-bottom:4px}
.city-card .province{color:var(--text-light);font-size:.85rem;margin-bottom:8px}
.city-card .desc{color:var(--text-light);font-size:.85rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:10px}
.city-card .meta{display:flex;justify-content:space-between;align-items:center;font-size:.85rem}
.city-card .budget{color:var(--accent);font-weight:600}
.city-card .rating{color:#f59e0b}
.city-card .tags{display:flex;gap:4px;flex-wrap:wrap;margin-bottom:8px}

/* 广告卡片 */
.city-card.ad-card{background:#f1f5f9;cursor:default;grid-column:span 2}
.city-card.ad-card:hover{transform:none;box-shadow:var(--shadow)}
.city-card.ad-card .ad-container{width:100%;height:100%;min-height:280px;display:flex;align-items:center;justify-content:center;padding:20px}
.city-card.ad-card .ad-container img{max-width:100%;height:auto;border-radius:8px}
.city-card.ad-card .ad-placeholder{color:var(--text-light);font-size:.9rem;text-align:center}

/* Region Section */
.region-section{margin-bottom:32px}
.region-title{font-size:1.2rem;font-weight:600;margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--primary)}

/* Filter Bar */
.filter-bar{display:flex;gap:12px;margin-bottom:24px;flex-wrap:wrap;align-items:center}
.filter-bar .search-input{flex:1;min-width:200px;padding:10px 16px;border:1px solid var(--border);border-radius:8px;font-size:.9rem;outline:none}
.filter-bar .search-input:focus{border-color:var(--primary)}
.filter-bar select{padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:.9rem;background:var(--white)}

/* City Detail */
.city-detail{margin-top:10px}
.city-banner{width:100%;height:450px;object-fit:cover;background:linear-gradient(135deg,#1e40af,#7c3aed)}

/* Banner Carousel (城市详情页轮播) */
.banner-carousel{position:relative;width:100%;height:450px;overflow:hidden;background:#000}
.banner-carousel .carousel-inner{position:relative;width:100%;height:100%}
/* 大图切割成小方块 - 使用background-image */
.banner-carousel .carousel-item{
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:100%;
  opacity:0;
  transition:opacity .5s ease-in-out;
  background-size: 200% 200%; /* 2x2切割 */
  background-repeat: no-repeat;
  background-color: #1a1a1a;
}
.banner-carousel .carousel-item.active{opacity:1;z-index:1}
.banner-carousel .carousel-dots{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:2}
.banner-carousel .carousel-dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;transition:all .3s}
.banner-carousel .carousel-dot.active{background:#fff;width:30px;border-radius:5px}

/* 轮播控制按钮 */
.carousel-control{position:absolute;top:50%;transform:translateY(-50%);background:rgba(0,0,0,.3);color:#fff;border:none;width:50px;height:50px;border-radius:50%;font-size:24px;cursor:pointer;z-index:10;transition:all .3s;opacity:0;pointer-events:none}
.banner-carousel:hover .carousel-control{opacity:1;pointer-events:auto}
.carousel-control:hover{background:rgba(0,0,0,.5);transform:translateY(-50%) scale(1.1)}
.carousel-control.prev{left:20px}
.carousel-control.next{right:20px}

/* 轮播指示器 */
.carousel-indicators{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:10}
.indicator{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;transition:all .3s;border:2px solid rgba(255,255,255,.3)}
.indicator:hover{background:rgba(255,255,255,.8)}
.indicator.active{background:#fff;border-color:#fff;width:30px;border-radius:5px}

/* 懒加载区域 */
.lazy-section{min-height:200px;position:relative}
.lazy-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:300px;padding:60px 20px}
.lazy-spinner{width:40px;height:40px;border:3px solid #e2e8f0;border-top-color:#3b82f6;border-radius:50%;animation:lazy-spin 0.8s linear infinite;margin-bottom:16px}
@keyframes lazy-spin{to{transform:rotate(360deg)}}
.lazy-placeholder p{color:#64748b;font-size:1rem}
.lazy-content{animation:lazy-fade-in 0.5s ease-out}
@keyframes lazy-fade-in{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}

.city-header{background:var(--white);padding:24px;margin-top:-80px;position:relative;border-radius:var(--radius) var(--radius) 0 0;margin-left:20px;margin-right:20px;box-shadow:var(--shadow);z-index:10}
.city-header h1{font-size:1.8rem;margin-bottom:8px}
.city-header .subtitle{color:var(--text-light);margin-bottom:12px}
.city-header .quick-info{display:flex;gap:24px;flex-wrap:wrap;font-size:.9rem;color:var(--text-light)}
.city-header .quick-info span{display:flex;align-items:center;gap:4px}
/* 城市特色标签 */
.city-header .city-tags{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px}
.city-header .city-tags .city-tag{background:linear-gradient(135deg,var(--primary-light) 0%,var(--primary) 100%);color:#fff;padding:6px 14px;border-radius:20px;font-size:.85rem;font-weight:500;box-shadow:0 2px 8px rgba(59,130,246,.2);transition:all .2s}
.city-header .city-tags .city-tag:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(59,130,246,.3)}
/* 城市点赞按钮 */
.like-btn,.favorite-btn{background:var(--bg);border:1px solid var(--border);border-radius:20px;padding:4px 12px;display:flex;align-items:center;gap:4px;cursor:pointer;transition:all .2s;font-size:.85rem;color:var(--text-light)}
.like-btn:hover,.favorite-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.like-btn.liked,.favorite-btn.favorited{background:#fee2e2;color:#ef4444;border-color:#ef4444}
.like-btn .like-icon,.favorite-btn .favorite-icon{font-size:1rem}
.like-btn .like-count{font-weight:600}
.breadcrumb{padding:6px 0;font-size:.85rem;color:var(--text-light)}
.breadcrumb a{color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}
.detail-layout{display:grid;grid-template-columns:1fr 300px;gap:24px;padding:24px 0}
.detail-content .section{background:var(--white);border-radius:var(--radius);padding:24px;margin-bottom:16px;box-shadow:var(--shadow)}
.detail-content h3{margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.detail-content p,.detail-content li{margin-bottom:8px;color:var(--text-light);line-height:1.8}
.detail-content ul{padding-left:20px}
.attraction-card{display:flex;gap:16px;padding:12px 0;border-bottom:1px solid var(--border)}
.attraction-card:last-child{border-bottom:none}
.attraction-card .rank{font-size:1.5rem;font-weight:700;color:var(--primary);min-width:32px}
.food-card{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--border)}
.food-card:last-child{border-bottom:none}
.sidebar .widget{background:var(--white);border-radius:var(--radius);padding:20px;margin-bottom:16px;box-shadow:var(--shadow)}
.sidebar h4{margin-bottom:12px}

/* 吃住行Tab */
.travel-tabs{display:flex;gap:8px;margin-bottom:16px;border-bottom:1px solid var(--border);padding-bottom:0}
.travel-tab{background:none;border:none;padding:10px 20px;cursor:pointer;font-size:.95rem;color:var(--text-light);border-bottom:2px solid transparent;transition:all .2s}
.travel-tab:hover{color:var(--primary)}
.travel-tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}
.travel-content{display:none}
.travel-content-active{display:block;animation:fadeIn .3s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* Pagination */
.pagination{display:flex;justify-content:center;align-items:center;gap:8px;padding:24px 0;flex-wrap:wrap}
.pagination-btn{padding:8px 14px;border:1px solid var(--border);border-radius:8px;font-size:.9rem;cursor:pointer;transition:all .2s;text-decoration:none;color:var(--text);background:var(--white);display:inline-block;min-width:40px;text-align:center}
.pagination-btn:hover{background:var(--bg);border-color:var(--primary);color:var(--primary);transform:translateY(-1px);box-shadow:0 2px 4px rgba(0,0,0,.1)}
.pagination-btn.active{background:var(--primary);color:var(--white);border-color:var(--primary);cursor:default}
.pagination-btn.active:hover{background:var(--primary);transform:none;box-shadow:none}
.pagination-ellipsis{padding:8px 4px;color:var(--text-light);font-size:.9rem;user-select:none}
.pagination-info{padding:8px 14px;color:var(--text-light);font-size:.9rem;margin-left:16px}

/* Footer */
.site-footer{background:#1e293b;color:#cbd5e1;padding:40px 0 20px;margin-top:40px}
.footer-content{display:flex;gap:40px;justify-content:space-between;align-items:flex-start;margin-bottom:24px;flex-wrap:wrap}
.footer-left{flex:1;min-width:0;max-width:600px}
.footer-right{flex:0 0 340px}
.footer-brand{margin-bottom:20px}
.footer-logo{font-size:1.2rem;font-weight:700;color:var(--white);margin-bottom:4px}
.footer-desc{color:#94a3b8;font-size:.9rem}
.footer-links{display:flex;gap:48px;flex-wrap:wrap}
.footer-col{min-width:120px}
.footer-col h4{color:var(--white);margin-bottom:8px;font-size:.9rem}
.footer-col a{color:#94a3b8;display:block;font-size:.85rem;padding:3px 0}
.footer-col a:hover{color:var(--white)}

/* 热门城市多列布局 */
.hot-cities-wrapper{display:flex;gap:24px;flex-wrap:wrap}
.hot-cities-col{min-width:100px;flex:1}
.hot-cities-col a{color:#94a3b8;display:block;font-size:.85rem;padding:3px 0}
.ai-upgrade-footer{background:rgba(255,255,255,.05);border-radius:12px;padding:16px;display:flex;gap:12px;width:100%}
.ai-upgrade-footer .ai-icon{font-size:2rem;flex-shrink:0}
.ai-upgrade-footer .ai-content h4{color:var(--white);margin:0 0 8px;font-size:.95rem}
.ai-upgrade-footer .ai-content p{color:#94a3b8;margin:4px 0;font-size:.8rem;line-height:1.4}
.ai-upgrade-footer .ai-features{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.ai-upgrade-footer .ai-feature{background:rgba(255,255,255,.1);color:#e2e8f0;padding:4px 10px;border-radius:10px;font-size:.75rem}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid #334155;font-size:.85rem}

/* Loading */
.loading{text-align:center;padding:40px;color:var(--text-light)}
.loading::after{content:'';display:inline-block;width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite;margin-left:8px}
@keyframes spin{to{transform:rotate(360deg)}}

/* Modal */
.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:200;display:flex;align-items:center;justify-content:center}
.modal{background:var(--white);border-radius:var(--radius);padding:24px;max-width:500px;width:90%;box-shadow:var(--shadow-md)}

/* Rating */
.rating{color:#f59e0b;font-size:.9rem}
.tag-sm{background:#eff6ff;color:var(--primary);padding:3px 10px;border-radius:12px;font-size:.75rem;display:inline-block;margin-right:4px}

/* 智能升级宣传语 */
.ai-upgrade-banner{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:16px 20px;border-radius:var(--radius);margin-bottom:24px;display:flex;align-items:center;gap:16px;box-shadow:var(--shadow-md)}
.ai-upgrade-banner .icon{font-size:2rem}
.ai-upgrade-banner .content h4{margin:0 0 4px;font-size:1.1rem}
.ai-upgrade-banner .content p{margin:0;font-size:.9rem;opacity:.9}
.ai-upgrade-banner .content .feature{display:inline-block;background:rgba(255,255,255,.2);padding:4px 10px;border-radius:12px;font-size:.8rem;margin-top:8px;margin-right:4px}

/* Responsive */
@media(max-width:1024px){.detail-layout{grid-template-columns:1fr}.sidebar{display:none}}
@media(max-width:640px){.hero{height:300px}.hero h1{font-size:1.6rem}.hero-inner{padding:20px 12px}.search-box{max-width:100%}.hero-inner .tag-chips{max-width:100%}.city-grid{grid-template-columns:1fr}.city-card.ad-card{grid-column:span 1}.navbar .nav-links{display:none}.city-header{margin-top:-40px;padding:16px;margin-left:10px;margin-right:10px}.city-banner{height:250px}.breadcrumb{padding:4px 0}}

/* 用户导航样式 */
.nav-divider{color:var(--border);margin:0 4px}
.user-info{color:var(--text);font-size:.9rem;font-weight:500;display:flex;align-items:center;gap:4px}
.logout-btn{color:#ef4444;font-size:.9rem}
.logout-btn:hover{color:#dc2626}

/* 城市标签页（外层主标签） */
.city-tabs-nav{display:flex;gap:4px;margin:20px 0;background:#f1f5f9;padding:6px;border-radius:10px;overflow-x:auto}
.city-tab{flex:1;min-width:100px;background:none;border:none;padding:10px 16px;cursor:pointer;font-size:.9rem;color:var(--text-light);border-radius:8px;transition:all .2s;white-space:nowrap;font-weight:500;text-align:center}
.city-tab:hover{background:rgba(37,99,235,.1);color:var(--primary)}
.city-tab.active{background:var(--white);color:var(--primary);box-shadow:0 1px 2px rgba(0,0,0,.1)}
.city-tabs-content{background:var(--white);border-radius:var(--radius);padding:20px;margin-bottom:16px;box-shadow:var(--shadow);min-height:200px}
.city-tab-pane{display:none}
.city-tab-pane.active{display:block;animation:fadeIn .3s ease}
.city-tab-pane p{color:var(--text-light);line-height:1.8;margin-bottom:12px}