*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:#f5f5f5;color:#333;min-height:100vh;line-height:1.6}
a{color:#1890ff;text-decoration:none}
a:hover{color:#40a9ff;text-decoration:underline}
img{max-width:100%}
main{min-height:70vh;padding:20px;max-width:1200px;margin:0 auto}

/* Navigation */
.top-nav{background:#fff;border-bottom:2px solid #1890ff;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,0.06)}
.nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 20px;height:56px}
.nav-logo{font-size:1.3rem;font-weight:700;color:#1890ff;text-decoration:none!important}
.nav-links{display:flex;gap:4px;flex-wrap:wrap}
.nav-link{color:#666;text-decoration:none;padding:6px 14px;border-radius:4px;font-size:0.9rem;transition:all .2s}
.nav-link:hover,.nav-link.active{color:#1890ff;background:#e6f7ff;text-decoration:none}

/* Footer */
footer{text-align:center;padding:30px 20px;color:#999;font-size:0.85rem;border-top:1px solid #e8e8e8;background:#fff;margin-top:40px}
footer a{color:#999;margin:0 8px}

/* Breadcrumb */
.breadcrumb{font-size:0.85rem;color:#999;margin-bottom:16px}
.breadcrumb a{color:#999}
.breadcrumb a:hover{color:#1890ff}

/* Page Header */
.page-header{margin-bottom:24px;background:#fff;padding:24px;border-radius:8px;box-shadow:0 1px 4px rgba(0,0,0,0.06)}
.page-header h1{font-size:1.6rem;color:#333;margin-bottom:8px}
.page-header p{color:#888;font-size:0.95rem}

/* Hero / Big Clock */
.hero{text-align:center;padding:40px 20px 30px;background:#fff;border-radius:8px;margin-bottom:20px;box-shadow:0 1px 4px rgba(0,0,0,0.06)}
.hero h1{font-size:2rem;color:#333;margin-bottom:10px}
.hero-subtitle{color:#888;font-size:1.05rem;margin-bottom:24px}
.search-box{position:relative;max-width:500px;margin:0 auto}
.search-box input{width:100%;padding:12px 18px;border:1px solid #d9d9d9;border-radius:6px;background:#fff;color:#333;font-size:0.95rem;outline:none;transition:border-color .2s}
.search-box input:focus{border-color:#1890ff;box-shadow:0 0 0 2px rgba(24,144,255,0.2)}
.search-results{position:absolute;top:100%;left:0;right:0;background:#fff;border:1px solid #e8e8e8;border-radius:0 0 6px 6px;max-height:400px;overflow-y:auto;z-index:50;margin-top:4px;box-shadow:0 4px 12px rgba(0,0,0,0.1)}
.sr-item{display:block;padding:10px 18px;color:#555;text-decoration:none;border-bottom:1px solid #f0f0f0;transition:background .15s}
.sr-item:hover{background:#f0f7ff;color:#1890ff;text-decoration:none}
.sr-item strong{color:#333}
.sr-meta{font-size:0.8rem;color:#aaa;margin-left:8px}

/* Home Content */
.home-content{padding:0}
.featured-section,.links-section{margin-bottom:30px}
.featured-section h2,.links-section h2{font-size:1.2rem;color:#333;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid #1890ff;display:inline-block}

/* Featured Grid */
.featured-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.featured-card{background:#fff;border:1px solid #e8e8e8;border-radius:8px;padding:14px;display:flex;align-items:center;gap:10px;text-decoration:none;transition:all .2s;box-shadow:0 1px 3px rgba(0,0,0,0.04)}
.featured-card:hover{border-color:#1890ff;background:#f0f7ff;text-decoration:none;transform:translateY(-2px);box-shadow:0 4px 12px rgba(24,144,255,0.15)}
.fc-flag{font-size:1.6rem}
.fc-info{display:flex;flex-direction:column}
.fc-city{font-size:0.95rem;color:#333;font-weight:600}
.fc-time{font-size:0.9rem;color:#f5222d;font-family:'Courier New',monospace;font-weight:600}
.fc-country{font-size:0.75rem;color:#999}

/* Popular Links */
.popular-links{display:flex;flex-wrap:wrap;gap:8px}
.pop-link{padding:6px 14px;background:#fff;border:1px solid #e8e8e8;border-radius:16px;color:#555;font-size:0.85rem;text-decoration:none;transition:all .2s}
.pop-link:hover{border-color:#1890ff;color:#1890ff;background:#f0f7ff;text-decoration:none}

/* Continent & Country Grids */
.continent-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px}
.cont-card{background:#fff;border:1px solid #e8e8e8;border-radius:8px;padding:24px;text-align:center;text-decoration:none;font-size:1rem;color:#555;transition:all .2s;box-shadow:0 1px 3px rgba(0,0,0,0.04)}
.cont-card:hover{border-color:#1890ff;background:#f0f7ff;transform:translateY(-2px);text-decoration:none;color:#1890ff;box-shadow:0 4px 12px rgba(24,144,255,0.15)}
.cc-icon{font-size:2rem;margin-bottom:8px}

.country-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.cntry-card{background:#fff;border:1px solid #e8e8e8;border-radius:8px;padding:12px 14px;display:flex;align-items:center;gap:10px;text-decoration:none;transition:all .2s;box-shadow:0 1px 3px rgba(0,0,0,0.04)}
.cntry-card:hover{border-color:#1890ff;background:#f0f7ff;text-decoration:none}
.cc-flag{font-size:1.6rem}
.cc-info{display:flex;flex-direction:column}
.cc-name{color:#333;font-weight:600;font-size:0.95rem}
.cc-capital{color:#999;font-size:0.8rem}

/* Country Page */
.country-hero{background:linear-gradient(135deg,#1890ff 0%,#096dd9 100%);border-radius:8px;padding:28px;margin-bottom:24px;box-shadow:0 4px 16px rgba(24,144,255,0.25);display:grid;grid-template-columns:1fr 1fr;gap:24px}
.country-hero-main{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#fff}
.country-hero-label{font-size:1.5rem;font-weight:700;margin-bottom:6px}
.country-hero-city{font-size:1rem;opacity:0.9;margin-bottom:16px}
.country-hero .big-clock{width:auto;height:auto}
.country-hero .digital-time{color:#fff;font-size:2.4rem;margin-top:0;text-shadow:0 2px 8px rgba(0,0,0,0.2);letter-spacing:1px}
.country-hero-date{font-size:1rem;margin-top:12px;opacity:0.95}
.country-hero-info{background:#fff;border-radius:8px;padding:18px;display:flex;flex-direction:column;justify-content:center;gap:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)}
.country-hero-info .info-row{display:flex;justify-content:space-between;align-items:center;padding:6px 0;border-bottom:1px solid #f0f0f0}
.country-hero-info .info-row:last-child{border-bottom:none}
.country-hero-info .info-label{color:#888;font-size:0.85rem}
.country-hero-info .info-value{color:#333;font-weight:600;font-size:0.9rem}

/* City State Groups */
.country-state-group{margin-bottom:20px;background:#fff;border-radius:8px;padding:16px;box-shadow:0 1px 3px rgba(0,0,0,0.04)}
.country-state-group h2{font-size:1.05rem;color:#333;margin-bottom:12px;padding:8px 12px;background:#f0f7ff;border-radius:4px;border-left:3px solid #1890ff}
.city-link-grid{display:flex;flex-wrap:wrap;gap:6px}
.city-link-item{display:inline-block;padding:5px 12px;background:#fafafa;border:1px solid #e8e8e8;border-radius:4px;color:#555;font-size:0.85rem;text-decoration:none;transition:all .15s}
.city-link-item:hover{background:#1890ff;color:#fff;border-color:#1890ff;text-decoration:none}
.city-link-item small{color:#bbb;margin-left:4px;font-size:0.75rem}
.city-link-item:hover small{color:rgba(255,255,255,0.8)}

/* City Detail Page */
.city-page{padding:0}
.city-hero{background:#fff;border:1px solid #e8e8e8;border-radius:8px;padding:28px;margin-bottom:20px;text-align:center;box-shadow:0 1px 4px rgba(0,0,0,0.06)}
.city-hero h1{font-size:1.6rem;color:#333;margin-bottom:14px}
.city-clock-large{display:flex;justify-content:center;margin:6px 0 10px 0}
.big-clock{width:auto;height:auto;position:relative;display:inline-block}
.digital-time{font-size:2.2rem;color:#f5222d;font-family:'Courier New','Consolas',monospace;margin-top:0;text-align:center;font-weight:700;letter-spacing:1px}
.city-meta{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:8px;text-align:left;margin-top:16px}
.meta-item{background:#fafafa;padding:10px 14px;border-radius:6px;display:flex;justify-content:space-between;align-items:center;border:1px solid #f0f0f0}
.meta-label{color:#888;font-size:0.85rem}
.meta-value{color:#333;font-weight:500;font-size:0.9rem}
.meta-highlight{color:#f5222d!important;font-weight:600}

/* Info Card */
.info-card{background:#fff;border-radius:8px;padding:20px;margin-bottom:20px;box-shadow:0 1px 4px rgba(0,0,0,0.06)}
.info-card h2{font-size:1.1rem;color:#333;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid #1890ff;display:inline-block}
.info-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:10px}
.info-row{display:flex;justify-content:space-between;padding:8px 12px;background:#fafafa;border-radius:4px}
.info-row .label{color:#888;font-size:0.85rem}
.info-row .value{color:#333;font-weight:500;font-size:0.9rem}

/* Sunrise/Sunset */
.sun-info{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;text-align:center}
.sun-item{background:#f0f7ff;padding:16px;border-radius:8px}
.sun-item .sun-label{color:#888;font-size:0.85rem;margin-bottom:6px}
.sun-item .sun-value{color:#1890ff;font-size:1.3rem;font-weight:600;font-family:'Courier New',monospace}

/* Nearby Cities */
.same-country-grid{display:flex;flex-wrap:wrap;gap:6px}
.sc-item{display:inline-block;padding:5px 12px;background:#fafafa;border:1px solid #e8e8e8;border-radius:4px;color:#555;font-size:0.85rem;text-decoration:none;transition:all .15s}
.sc-item:hover{background:#1890ff;color:#fff;border-color:#1890ff;text-decoration:none}
.sc-item small{color:#bbb;margin-left:4px;font-size:0.75rem}
.sc-item:hover small{color:rgba(255,255,255,0.8)}

/* Diff Compare Grid */
.diff-compare-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px}
.diff-card{background:#fff;border:1px solid #e8e8e8;border-radius:8px;padding:12px 14px;text-decoration:none;transition:all .2s;display:flex;justify-content:space-between;align-items:center;box-shadow:0 1px 3px rgba(0,0,0,0.04)}
.diff-card:hover{border-color:#1890ff;background:#f0f7ff;text-decoration:none}
.dc-city{color:#333;font-weight:600;font-size:0.9rem}
.dc-country{color:#999;font-size:0.75rem;flex:1;margin:0 10px}
.dc-hours{color:#f5222d;font-weight:700;font-size:0.9rem;white-space:nowrap}

/* Diff Page */
.diff-page{padding:0}
.diff-page h1{font-size:1.5rem;color:#333;margin-bottom:20px;text-align:center}
.diff-display{text-align:center;padding:24px;background:#fff;border:1px solid #e8e8e8;border-radius:8px;margin-bottom:20px;box-shadow:0 1px 4px rgba(0,0,0,0.06)}
.diff-big{font-size:2.2rem;color:#f5222d;font-weight:700}
.diff-sub{color:#666;margin-top:8px;font-size:1rem}
.diff-clocks{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin-bottom:20px}
.diff-city-card{background:#fff;border:1px solid #e8e8e8;border-radius:8px;padding:20px;text-align:center;box-shadow:0 1px 4px rgba(0,0,0,0.06)}
.diff-city-card h2{color:#333;font-size:1.15rem;margin-bottom:14px}
.diff-city-card h2 small{color:#999;font-size:0.85rem;margin-left:6px}
.diff-city-card .big-clock{margin:0 auto 14px}

/* 24h Table */
.hour-table{width:100%;border-collapse:collapse;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 1px 4px rgba(0,0,0,0.06)}
.hour-table th{background:#1890ff;color:#fff;padding:10px 12px;font-size:0.9rem;text-align:center}
.hour-table td{padding:8px 12px;text-align:center;border-bottom:1px solid #f0f0f0;font-size:0.85rem;color:#555}
.hour-table tr:nth-child(even){background:#fafafa}
.hour-table tr:hover{background:#f0f7ff}

/* Timezone Compare */
.tz-compare{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}
.tz-group{background:#fff;border-radius:8px;padding:16px;box-shadow:0 1px 4px rgba(0,0,0,0.06)}
.tz-group h3{font-size:1rem;color:#333;margin-bottom:12px;padding-bottom:8px;border-bottom:2px solid #1890ff}
.tz-item{display:flex;justify-content:space-between;padding:8px 10px;background:#fafafa;border-radius:4px;margin-bottom:6px}
.tz-item .tz-name{color:#555;font-size:0.85rem}
.tz-item .tz-time{color:#f5222d;font-family:'Courier New',monospace;font-size:0.85rem;font-weight:600}

/* Tabs */
.tabs{display:flex;gap:0;margin-bottom:20px;border-bottom:2px solid #e8e8e8}
.tab-item{padding:10px 20px;cursor:pointer;color:#666;font-size:0.9rem;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .2s}
.tab-item:hover{color:#1890ff}
.tab-item.active{color:#1890ff;border-bottom-color:#1890ff;font-weight:600}
.tab-content{display:none}
.tab-content.active{display:block}

/* Landmark */
.landmark-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.lm-card{background:#fff;border:1px solid #e8e8e8;border-radius:8px;padding:18px;text-decoration:none;transition:all .2s;box-shadow:0 1px 3px rgba(0,0,0,0.04)}
.lm-card:hover{border-color:#1890ff;background:#f0f7ff;text-decoration:none;transform:translateY(-2px)}
.lm-card h3{color:#333;font-size:1rem;margin-bottom:6px}
.lm-card p{color:#888;font-size:0.85rem}
.lm-cont{display:inline-block;padding:2px 8px;background:#e6f7ff;border-radius:4px;font-size:0.75rem;color:#1890ff;margin-top:8px}
.lm-loc{font-size:0.8rem;color:#999;font-weight:normal}
.lm-desc{color:#666;font-size:0.9rem;max-width:600px;margin:0 auto 20px;line-height:1.6}

/* Buttons */
.btn{display:inline-block;padding:10px 24px;background:#1890ff;color:#fff;border-radius:6px;text-decoration:none;font-weight:500;transition:background .2s}
.btn:hover{background:#40a9ff;color:#fff;text-decoration:none}

/* Error */
.error-page{text-align:center;padding:80px 20px}
.error-page h1{font-size:4rem;color:#ccc}
.error-page p{font-size:1.1rem;color:#999;margin:10px 0 30px}

/* Responsive */
@media(max-width:768px){
  .nav-links{display:none}
  .hero h1{font-size:1.5rem}
  .country-hero{grid-template-columns:1fr;padding:20px}
  .country-hero .big-clock{width:160px;height:160px}
  .diff-big{font-size:1.6rem}
  .tz-compare{grid-template-columns:1fr}
  .country-grid,.continent-grid{grid-template-columns:1fr 1fr}
  main{padding:12px}
}
@media(max-width:480px){
  .featured-grid{grid-template-columns:1fr}
  .country-grid,.continent-grid{grid-template-columns:1fr}
}