/*
Theme Name: 新世界导航
Theme URI: https://newstart.icu
Description: 一款基于 Glassmorphism 风格的导航主题，支持分类管理、多搜索引擎、暗色模式、背景自定义。
Author: 新世界
Author URI: https://newstart.icu
Version: 4.0.0
Requires at least: 5.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: explorer-nav
Tags: one-column, custom-background, custom-colors, custom-logo, custom-menu, featured-images, theme-options
*/

/* ===== RESET & VARIABLES ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f5f5f7;--fg:#1d1d1f;
  --card:rgba(255,255,255,0.72);--card-solid:#fff;
  --muted:#f0f0f2;--muted-fg:#86868b;
  --accent:rgba(240,240,242,0.8);
  --border:rgba(229,229,231,0.5);
  --primary:#667eea;--primary-fg:#fff;
  --sidebar-w:200px;--header-h:56px;
  --radius:14px;--radius-sm:10px;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.04),0 1px 2px rgba(0,0,0,0.06);
  --shadow-md:0 4px 6px -1px rgba(0,0,0,0.07),0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg:0 10px 15px -3px rgba(0,0,0,0.08),0 4px 6px -4px rgba(0,0,0,0.04);
  --glass-blur:blur(16px) saturate(180%)
}
.dark{
  --bg:#0a0a0f;--fg:#e5e5e7;
  --card:rgba(20,20,32,0.72);--card-solid:#141420;
  --muted:#1c1c2e;--muted-fg:#9898a0;
  --accent:rgba(28,28,46,0.8);
  --border:rgba(42,42,60,0.6);
  --shadow-sm:0 1px 3px rgba(0,0,0,0.2),0 1px 2px rgba(0,0,0,0.3);
  --shadow-md:0 4px 6px -1px rgba(0,0,0,0.25),0 2px 4px -2px rgba(0,0,0,0.2);
  --shadow-lg:0 10px 15px -3px rgba(0,0,0,0.3),0 4px 6px -4px rgba(0,0,0,0.2)
}
html{scroll-behavior:smooth;overflow-x:hidden;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,'PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--fg);-webkit-tap-highlight-color:transparent;overflow-x:hidden;min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:color .2s}
img{max-width:100%;height:auto;display:block}
button{cursor:pointer;font:inherit;border:none;background:none}
input,textarea,select{font:inherit}
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(128,128,128,0.2);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:rgba(128,128,128,0.35)}

#page{min-height:100vh;display:flex;flex-direction:column;background:var(--bg)}

/* ===== Header ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:50;height:var(--header-h);transition:all .3s;background:transparent;padding-top:env(safe-area-inset-top)}
.header.scrolled{background:var(--card);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--shadow-sm);border-bottom:1px solid var(--border)}
.header-inner{max-width:1320px;margin:0 auto;padding:0 16px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:center;gap:8px;cursor:pointer;flex-shrink:0;text-decoration:none}
.logo-icon{width:32px;height:32px;border-radius:var(--radius-sm);background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.logo-icon svg{width:18px;height:18px;color:#fff}
.logo-text{font-size:16px;font-weight:700;letter-spacing:-.02em;color:var(--fg);white-space:nowrap}
.header-actions{display:flex;align-items:center;gap:4px;flex-shrink:0}
.header-btn{width:36px;height:36px;border-radius:8px;color:var(--muted-fg);transition:all .2s;display:flex;align-items:center;justify-content:center}
.header-btn:hover{background:var(--accent);color:var(--fg)}
.header-btn svg{width:18px;height:18px}

/* ===== Search Banner ===== */
.search-banner{margin-top:var(--header-h)}
.search-hero{position:relative;overflow:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;height:300px}
.particles{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.search-content{position:relative;z-index:10;width:100%;max-width:660px;padding:0 20px}
.search-greeting{text-align:center;margin-bottom:16px}
.search-greeting h1{color:#fff;font-size:30px;font-weight:700;margin-bottom:4px;text-shadow:0 1px 4px rgba(0,0,0,0.1)}
.search-greeting p{color:rgba(255,255,255,0.7);font-size:13px}
.search-box{display:flex;align-items:center;background:rgba(255,255,255,0.95);border-radius:9999px;box-shadow:0 8px 24px rgba(0,0,0,0.15);overflow:hidden}
.dark .search-box{background:rgba(20,20,32,0.95)}
.search-box-inner{position:relative;flex:1;display:flex;align-items:center}
.search-box-inner svg{position:absolute;left:16px;width:18px;height:18px;color:#9ca3af;pointer-events:none}
.search-box input{width:100%;padding:16px 16px 16px 46px;background:transparent;font-size:15px;color:var(--fg);outline:none;border:none}
.search-box input::placeholder{color:var(--muted-fg)}
.search-btn{margin:4px;padding:10px 24px;border-radius:9999px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:14px;font-weight:500;flex-shrink:0;transition:opacity .2s}
.search-btn:hover{opacity:.9}

/* Engine pills */
.engine-pills{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:14px}
.engine-pill{padding:5px 12px;border-radius:9999px;font-size:13px;transition:all .2s;white-space:nowrap;display:inline-flex;align-items:center;gap:5px;background:rgba(255,255,255,0.15);color:rgba(255,255,255,0.8);border:none;cursor:pointer;font:inherit}
.engine-pill:hover{background:rgba(255,255,255,0.25);color:#fff}
.engine-pill.active{background:#fff;color:#667eea;font-weight:500;box-shadow:0 2px 6px rgba(0,0,0,0.1)}
.engine-pill img{width:14px;height:14px;border-radius:2px}

/* Hot searches */
.hot-searches{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:12px}
.hot-searches .label{color:rgba(255,255,255,0.6);font-size:12px;display:flex;align-items:center}
.hot-tag{font-size:12px;padding:3px 10px;border-radius:9999px;color:rgba(255,255,255,0.8);background:rgba(255,255,255,0.12);transition:all .2s;cursor:pointer}
.hot-tag:hover{background:rgba(255,255,255,0.22);color:#fff}

/* Particles */
@keyframes float-particle{0%,100%{transform:translateY(0) translateX(0);opacity:0}10%{opacity:var(--po,0.3)}90%{opacity:var(--po,0.3)}50%{transform:translateY(-80px) translateX(30px)}}
.particle{position:absolute;border-radius:50%;background:white;animation:float-particle var(--dur,6s) ease-in-out infinite;animation-delay:var(--del,0s)}

/* ===== Main Layout ===== */
.site-main{flex:1;max-width:1320px;margin:0 auto;width:100%;padding:24px 16px}
.main-layout{display:flex;gap:20px}

/* Desktop Sidebar */
.cat-sidebar{width:var(--sidebar-w);flex-shrink:0}
.cat-sidebar-inner{position:sticky;top:calc(var(--header-h) + 20px);background:var(--card);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border-radius:var(--radius);padding:14px 10px;border:1px solid var(--border);box-shadow:var(--shadow-sm);max-height:calc(100vh - var(--header-h) - 40px);overflow-y:auto}
.cat-sidebar-title{font-size:11px;font-weight:600;color:var(--muted-fg);margin-bottom:8px;padding:0 12px;text-transform:uppercase;letter-spacing:.05em}
.cat-list{display:flex;flex-direction:column;gap:2px}
.cat-btn{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;font-size:14px;transition:all .2s;text-align:left;color:var(--fg);opacity:.65;width:100%;border:none;background:none}
.cat-btn:hover{opacity:1;background:var(--accent)}
.cat-btn.active{opacity:1;background:rgba(102,126,234,0.1);color:var(--primary);font-weight:500}
.dark .cat-btn.active{background:rgba(102,126,234,0.15)}
.cat-btn svg{width:16px;height:16px;flex-shrink:0;color:var(--muted-fg)}
.cat-btn.active svg{color:var(--primary)}
.cat-count{margin-left:auto;font-size:11px;color:var(--muted-fg);background:var(--muted);padding:1px 6px;border-radius:9999px;line-height:1.4}
.cat-btn.active .cat-count{background:rgba(102,126,234,0.15);color:var(--primary)}

/* Content Area */
.content-area{flex:1;min-width:0}

/* Category Section */
.cat-section{margin-bottom:36px}
.cat-section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.cat-section-title{display:flex;align-items:center;gap:10px}
.cat-section-dot{width:4px;height:20px;border-radius:2px}
.cat-section-title h2{font-size:18px;font-weight:700;color:var(--fg)}

/* Site Grid */
.site-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}

/* Site Card */
.site-card{background:var(--card);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--border);border-radius:var(--radius);padding:14px;display:flex;align-items:center;gap:12px;cursor:pointer;transition:transform .25s,box-shadow .25s,border-color .25s}
.site-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(102,126,234,0.12);border-color:rgba(102,126,234,0.3)}
.dark .site-card:hover{box-shadow:0 8px 24px rgba(102,126,234,0.08);border-color:rgba(102,126,234,0.2)}
.site-card-icon{width:42px;height:42px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden;position:relative}
.site-card-icon img{width:24px;height:24px;object-fit:contain;position:absolute;transition:opacity .2s}
.site-card-icon .letter{font-size:18px;font-weight:700;transition:opacity .2s}
.site-card-info{min-width:0;flex:1}
.site-card-title{font-size:14px;font-weight:600;color:var(--fg);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;transition:color .2s}
.site-card:hover .site-card-title{color:var(--primary)}
.site-card-desc{font-size:12px;color:var(--muted-fg);margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* Section reveal */
.section-reveal{opacity:0;transform:translateY(16px);transition:opacity .6s cubic-bezier(.16,1,.3,1),transform .6s cubic-bezier(.16,1,.3,1)}
.section-reveal.visible{opacity:1;transform:translateY(0)}

/* ===== Footer ===== */
.site-footer{margin-top:auto;border-top:1px solid var(--border);background:var(--card);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur)}
.footer-inner{max-width:1320px;margin:0 auto;padding:32px 20px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.footer-copy{font-size:13px;color:var(--muted-fg)}
.footer-made{font-size:12px;color:var(--muted-fg);display:flex;align-items:center;gap:5px}
.footer-made .heart{color:#f87171}

/* Back to top */
.back-to-top{position:fixed;bottom:28px;right:28px;z-index:50;width:42px;height:42px;border-radius:50%;background:var(--card-solid);border:1px solid var(--border);box-shadow:var(--shadow-md);color:var(--fg);opacity:0;transform:scale(.8) translateY(8px);transition:all .3s cubic-bezier(.16,1,.3,1);display:flex;align-items:center;justify-content:center}
.back-to-top.show{opacity:1;transform:scale(1) translateY(0)}
.back-to-top:hover{background:var(--accent);border-color:rgba(102,126,234,0.3);color:var(--primary)}
.back-to-top svg{width:18px;height:18px}

/* Mobile tabs */
.mobile-tabs{display:none}
.mobile-tabs-inner{overflow-x:auto;-webkit-overflow-scrolling:touch;display:flex;gap:8px;padding:2px 0 10px 0}
.mobile-tab{display:flex;align-items:center;gap:5px;padding:8px 14px;border-radius:8px;font-size:12px;font-weight:500;white-space:nowrap;flex-shrink:0;background:var(--card);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);color:var(--muted-fg);border:1px solid var(--border);transition:all .2s}
.mobile-tab:hover{color:var(--fg);border-color:rgba(102,126,234,0.2)}
.mobile-tab.active{background:var(--primary);color:#fff;box-shadow:0 2px 8px rgba(102,126,234,0.3);border-color:transparent}
.mobile-tab svg{width:14px;height:14px}

/* BG Settings Panel */
.bg-panel{position:fixed;top:var(--header-h);right:16px;z-index:100;width:320px;max-height:calc(100vh - 80px);overflow-y:auto;background:var(--card-solid);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:20px;opacity:0;transform:translateY(-8px);transition:opacity .25s,transform .25s;display:none}
.bg-panel.open{display:block;opacity:1;transform:translateY(0)}
.bg-panel-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.bg-panel-header h3{font-size:15px;font-weight:600;color:var(--fg)}
.bg-panel-desc{font-size:12px;color:var(--muted-fg);margin-bottom:12px}
.bg-presets{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:16px}
.bg-preset-btn{height:48px;border-radius:10px;border:2px solid var(--border);cursor:pointer;transition:all .2s;font-size:11px;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,0.3);font-weight:500}
.bg-preset-btn:hover{transform:scale(1.03);border-color:var(--primary)}
.bg-reset-btn{width:100%;padding:8px;border-radius:8px;font-size:13px;color:var(--muted-fg);border:1px solid var(--border);background:var(--muted);transition:all .2s;margin-top:12px}

/* Empty state */
.empty-state{text-align:center;padding:48px 20px;color:var(--muted-fg)}

/* ===== RESPONSIVE ===== */
@media(max-width:1023px){
  .cat-sidebar{display:none}
  .mobile-tabs{display:block;width:100%}
  .main-layout{flex-direction:column}
  .site-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:767px){
  :root{--header-h:48px;--radius:12px}
  .search-hero{height:240px}
  .search-greeting h1{font-size:22px}
  .search-greeting p{font-size:12px}
  .search-box input{padding:12px 12px 12px 40px;font-size:14px}
  .search-btn{padding:8px 16px;font-size:13px}
  .engine-pill{padding:4px 10px;font-size:12px}
  .hot-searches{display:none}
  .site-main{padding:16px 10px}
  .site-grid{grid-template-columns:repeat(2,1fr);gap:8px}
  .site-card{padding:10px;gap:10px}
  .site-card-icon{width:38px;height:38px}
  .site-card-icon img{width:20px;height:20px}
  .site-card-icon .letter{font-size:16px}
  .site-card-desc{display:none}
  .cat-section{margin-bottom:24px}
  .cat-section-title h2{font-size:16px}
  .footer-inner{padding:24px 16px;gap:10px}
  .back-to-top{bottom:20px;right:20px;width:38px;height:38px}
  .bg-panel{width:calc(100vw - 32px);right:16px}
}
@media(min-width:768px){.site-main{padding:28px 20px}}
@media(min-width:1024px){.site-main{padding:32px 24px}}