/* ===== 全局变量 ===== */
:root {
  --primary: #4F46E5;
  --primary-dark: #3730A3;
  --primary-light: #EEF2FF;
  --text: #1F2937;
  --text-2: #6B7280;
  --text-3: #9CA3AF;
  --border: #E5E7EB;
  --bg: #F9FAFB;
  --white: #FFFFFF;
  --radius: 12px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.03);
  --hot: #EF4444;
  --new: #10B981;
}

/* ===== 重置 ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;color:var(--text);background:var(--bg);line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}
ul,ol{list-style:none}
input,textarea,select,button{font-family:inherit}

/* ===== 容器 ===== */
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== Header ===== */
.site-header{background:var(--white);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:var(--shadow)}
.header-inner{display:flex;align-items:center;gap:24px;height:60px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--text);flex-shrink:0}
.logo-icon{width:36px;height:36px;border-radius:8px}
.logo-text{background:linear-gradient(135deg,var(--primary),#7C3AED);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.main-nav{display:flex;align-items:center;gap:2px;flex:1;overflow-x:auto;scrollbar-width:none}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{padding:6px 12px;border-radius:var(--radius-sm);font-size:14px;color:var(--text-2);white-space:nowrap;transition:all .2s}
.main-nav a:hover{background:var(--primary-light);color:var(--primary)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:4px;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text);border-radius:2px;transition:.3s}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,#4F46E5 0%,#7C3AED 100%);color:#fff;padding:48px 0 40px}
.hero-title{font-size:2rem;font-weight:800;text-align:center;margin-bottom:10px}
.hero-sub{text-align:center;opacity:.9;margin-bottom:24px;font-size:1rem}
.tool-search-bar{max-width:600px;margin:0 auto;display:flex;background:#fff;border-radius:50px;overflow:hidden;box-shadow:0 4px 24px rgba(0,0,0,.15)}
.tool-search-bar input{flex:1;border:none;outline:none;padding:14px 20px;font-size:16px;color:var(--text);background:transparent}
.tool-search-bar button{background:var(--primary);border:none;padding:0 24px;cursor:pointer;color:#fff;transition:.2s;display:flex;align-items:center}
.tool-search-bar button:hover{background:var(--primary-dark)}
.tool-search-bar button svg{width:20px;height:20px}

/* ===== 主内容区域 ===== */
.main-content{padding:32px 0 48px}

/* ===== 分区 ===== */
.section{margin-bottom:36px}
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.section-title{display:flex;align-items:center;gap:8px;font-size:1.1rem;font-weight:700;color:var(--text)}
.section-title svg{width:20px;height:20px;color:var(--primary)}
.tool-count{background:var(--primary-light);color:var(--primary);font-size:12px;font-weight:600;padding:2px 8px;border-radius:20px}
.see-all{font-size:14px;color:var(--primary);font-weight:500;transition:.2s}
.see-all:hover{color:var(--primary-dark)}

/* ===== 工具卡片网格 ===== */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.tool-card{display:flex;align-items:center;gap:12px;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;transition:all .2s;position:relative;cursor:pointer}
.tool-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-1px)}
.tool-card .tool-icon{width:40px;height:40px;flex-shrink:0;color:var(--primary);background:var(--primary-light);border-radius:8px;display:flex;align-items:center;justify-content:center;padding:8px}
.tool-card .tool-icon svg{width:100%;height:100%}
.tool-card .tool-info{min-width:0}
.tool-card .tool-info h3{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:2px}
.tool-card .tool-info p{font-size:12px;color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.4}

/* badge */
.badge-hot,.badge-new{position:absolute;top:8px;right:8px;font-size:10px;font-weight:700;padding:2px 6px;border-radius:20px}
.badge-hot{background:#FEE2E2;color:var(--hot)}
.badge-new{background:#D1FAE5;color:var(--new)}

/* ===== 面包屑 ===== */
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-2);margin-bottom:20px;padding:12px 0;border-bottom:1px solid var(--border)}
.breadcrumb a{color:var(--text-2);transition:.2s}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--text-3)}

/* ===== 分类页 ===== */
.page-header{display:flex;align-items:center;gap:16px;margin-bottom:28px;background:var(--white);padding:24px;border-radius:var(--radius);border:1px solid var(--border)}
.page-icon{width:56px;height:56px;background:var(--primary-light);color:var(--primary);border-radius:12px;display:flex;align-items:center;justify-content:center;padding:12px;flex-shrink:0}
.page-icon svg{width:100%;height:100%}
.page-header h1{font-size:1.4rem;font-weight:800;margin-bottom:4px}
.page-header p{color:var(--text-2);font-size:14px}

/* ===== 工具页 ===== */
.tool-page .main-content{padding:24px 0 48px}
.tool-page-layout{display:grid;grid-template-columns:1fr 240px;gap:24px;align-items:start}
.tool-header{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:20px}
.tool-header h1{font-size:1.5rem;font-weight:800;margin-bottom:6px}
.tool-subtitle{color:var(--text-2);font-size:15px;margin-bottom:12px}
.tool-meta{display:flex;align-items:center;gap:16px;font-size:13px;color:var(--text-2)}
.tool-meta-cat a{color:var(--primary)}
.tool-meta-views{display:flex;align-items:center;gap:4px}
.tool-workspace{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:24px;min-height:300px}
.tool-description{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-top:20px}
.tool-description h2{font-size:1.1rem;font-weight:700;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.tool-desc-content{font-size:14px;color:var(--text-2);line-height:1.9}

/* 侧边栏 */
.tool-sidebar{position:sticky;top:80px}
.sidebar-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.sidebar-title{font-size:14px;font-weight:700;margin-bottom:14px;color:var(--text)}
.related-list{display:flex;flex-direction:column;gap:2px}
.related-list li a{display:block;padding:7px 10px;border-radius:6px;font-size:13px;color:var(--text-2);transition:.2s}
.related-list li a:hover{background:var(--primary-light);color:var(--primary)}
.see-all-link{display:block;text-align:center;margin-top:12px;padding:8px;border-radius:6px;font-size:13px;color:var(--primary);border:1px solid var(--primary-light);transition:.2s}
.see-all-link:hover{background:var(--primary-light)}

/* ===== 工具通用样式 ===== */
.tool-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.tool-label{font-size:13px;font-weight:600;color:var(--text);margin-bottom:6px;display:flex;align-items:center;justify-content:space-between}
.tool-textarea{width:100%;border:1px solid var(--border);border-radius:8px;padding:12px;font-size:13px;font-family:'SFMono-Regular','Consolas',monospace;resize:vertical;min-height:200px;outline:none;transition:.2s;line-height:1.6}
.tool-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.08)}
.tool-input{width:100%;border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:14px;outline:none;transition:.2s}
.tool-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.08)}
.tool-actions{display:flex;gap:8px;margin:12px 0;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;border:1px solid transparent}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:var(--bg);color:var(--text);border-color:var(--border)}
.btn-secondary:hover{background:var(--border)}
.btn-ghost{background:transparent;color:var(--text-2);border-color:var(--border)}
.btn-ghost:hover{background:var(--bg)}
.btn-danger{background:#EF4444;color:#fff;border-color:#EF4444}
.btn-sm{padding:5px 12px;font-size:13px;border-radius:6px}
.btn-block{width:100%;justify-content:center}
.copy-btn{font-size:12px;padding:3px 10px;background:var(--primary-light);color:var(--primary);border:none;border-radius:4px;cursor:pointer;transition:.2s}
.copy-btn:hover{background:var(--primary);color:#fff}
.tool-result{background:#F8FAFC;border:1px solid var(--border);border-radius:8px;padding:12px;font-size:13px;font-family:monospace;min-height:60px;word-break:break-all;white-space:pre-wrap}
.tool-error{color:#EF4444;font-size:13px;margin-top:6px}
.tool-success{color:#10B981;font-size:13px;margin-top:6px}
.tool-tip{font-size:12px;color:var(--text-3);margin-top:6px}

/* 选项组 */
.tool-options{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:12px;align-items:center}
.tool-options label{font-size:13px;display:flex;align-items:center;gap:4px;cursor:pointer}
.tool-options select,.tool-options input[type=number]{border:1px solid var(--border);border-radius:6px;padding:4px 8px;font-size:13px;outline:none}

/* ===== 搜索结果 ===== */
.search-result-wrap{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:200;overflow-y:auto;padding:80px 0 40px}
.search-result-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;font-weight:600}
.search-result-header button{background:none;border:1px solid var(--border);border-radius:6px;padding:4px 12px;cursor:pointer;font-size:13px;color:#fff}

/* ===== 404页面 ===== */
.error-page{text-align:center;padding:80px 0}
.error-code{font-size:120px;font-weight:900;line-height:1;background:linear-gradient(135deg,var(--primary),#7C3AED);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:16px}
.error-title{font-size:1.5rem;font-weight:700;margin-bottom:12px}
.error-desc{color:var(--text-2);margin-bottom:24px}
.error-actions{margin-bottom:40px}
.error-suggest p{color:var(--text-2);font-size:14px;margin-bottom:8px}

/* ===== Footer ===== */
.site-footer{background:var(--text);color:#9CA3AF;padding:48px 0 24px;margin-top:auto}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand .logo{color:#fff;margin-bottom:12px;display:inline-flex}
.footer-brand .logo-text{-webkit-text-fill-color:#fff;background:none}
.footer-desc{font-size:13px;line-height:1.7;max-width:280px}
.footer-links h3{color:#fff;font-size:14px;font-weight:600;margin-bottom:14px}
.footer-links ul{display:flex;flex-direction:column;gap:8px}
.footer-links ul a{font-size:13px;transition:.2s}
.footer-links ul a:hover{color:#fff}
.beian{margin-top:12px;font-size:12px}
.beian a{color:inherit}
.beian a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;font-size:13px;text-align:center}

/* ===== 响应式 ===== */
@media (max-width:900px) {
  .tool-page-layout{grid-template-columns:1fr}
  .tool-sidebar{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px) {
  .hero-title{font-size:1.5rem}
  .tool-grid{grid-template-columns:1fr 1fr}
  .main-nav{display:none}
  .main-nav.open{display:flex;flex-direction:column;position:fixed;top:60px;left:0;right:0;background:#fff;padding:12px;border-bottom:1px solid var(--border);z-index:99}
  .nav-toggle{display:flex}
  .tool-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:480px) {
  .tool-grid{grid-template-columns:1fr}
}