/* ===== JZ百宝箱 共享样式 ===== */
:root {
    --bg-dark: #0a1628;
    --bg-card: rgba(255,255,255,0.03);
    --border-color: rgba(255,255,255,0.1);
    --accent-blue: #3b82f6;
    --accent-purple: #818cf8;
    --gradient-gold: linear-gradient(135deg, #f59e0b, #d97706);
    --gradient-blue: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --text-primary: #fff;
    --text-secondary: rgba(255,255,255,0.6);
    --text-muted: rgba(255,255,255,0.4);
    --input-bg: rgba(255,255,255,0.05);
    --input-border: rgba(255,255,255,0.15);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #16213e 0%, #1e3a8a 50%, #16213e 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    position: relative;
}
/* 蓝色+金色径向发光 — 跟官网 body::before 一致 */
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
}
/* 网格线 — 跟官网 body::after 一致 */
body::after {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px, 50px 50px;
}

/* ===== 顶部导航栏 ===== */
.tools-nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(22, 33, 62, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 2rem;
    height: 70px;
    display: flex; align-items: center; justify-content: space-between;
}
.tools-nav .nav-brand {
    display: flex; align-items: center; gap: 12px; text-decoration: none; color: #fff;
}
.tools-nav .nav-brand img { height: 40px; }
.tools-nav .nav-brand .brand-text { display: flex; flex-direction: column; }
.tools-nav .nav-brand .brand-name { font-size: 1.1rem; font-weight: 700; }
.tools-nav .nav-brand .brand-sub { font-size: 0.7rem; color: var(--text-secondary); letter-spacing: 1px; }
.tools-nav .nav-links { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.tools-nav .nav-links a {
    color: var(--text-secondary); text-decoration: none; padding: 8px 16px;
    border-radius: 8px; font-size: 0.95rem; font-weight: 500; transition: all 0.3s;
    white-space: nowrap;
}
.tools-nav .nav-links a:hover, .tools-nav .nav-links a.active {
    color: #fff; background: rgba(59,130,246,0.15);
}
.tools-nav .back-home {
    background: var(--gradient-blue); color: #fff; padding: 8px 18px;
    border-radius: 8px; text-decoration: none; font-size: 0.85rem; font-weight: 500;
    transition: all 0.3s; white-space: nowrap;
}
.tools-nav .back-home:hover { transform: translateY(-1px); box-shadow: 0 4px 15px rgba(59,130,246,0.3); }

/* ===== 主内容区 ===== */
.tools-main {
    padding-top: 90px; padding-bottom: 2rem;
    min-height: calc(100vh - 200px);
    max-width: 1200px; margin: 0 auto; padding-left: 2rem; padding-right: 2rem;
    position: relative; z-index: 1;
}

/* ===== 工具页面标题 ===== */
.tools-page-header {
    text-align: center; margin-bottom: 2rem;
}
.tools-page-header h1 {
    font-size: 2rem; font-weight: 700; margin-bottom: 0.5rem;
    background: var(--gradient-blue); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.tools-page-header p { color: var(--text-secondary); font-size: 0.95rem; }

/* ===== 卡片 ===== */
.tool-card {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: 12px; padding: 1.5rem; margin-bottom: 1.5rem;
    transition: all 0.3s;
}
.tool-card:hover { border-color: rgba(59,130,246,0.3); }
.tool-card h3 {
    font-size: 1.1rem; font-weight: 600; margin-bottom: 1rem;
    display: flex; align-items: center; gap: 8px;
}
.tool-card h3 i { color: var(--accent-blue); }

/* ===== 表单元素 ===== */
.form-group { margin-bottom: 1rem; }
.form-group label {
    display: block; font-size: 0.85rem; color: var(--text-secondary);
    margin-bottom: 0.3rem; font-weight: 500;
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 10px 14px;
    background: var(--input-bg); border: 1px solid var(--input-border);
    border-radius: 8px; color: #fff; font-size: 0.9rem;
    transition: border-color 0.3s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.form-group select option { background: #1e293b; color: #fff; }
.form-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 150px; }

/* ===== 按钮 ===== */
.btn {
    padding: 10px 24px; border-radius: 8px; border: none;
    font-size: 0.9rem; font-weight: 500; cursor: pointer;
    transition: all 0.3s; display: inline-flex; align-items: center; gap: 6px;
}
.btn-primary { background: var(--gradient-blue); color: #fff; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 15px rgba(59,130,246,0.3); }
.btn-success { background: linear-gradient(135deg, #10b981, #059669); color: #fff; }
.btn-warning { background: var(--gradient-gold); color: #fff; }
.btn-danger { background: linear-gradient(135deg, #ef4444, #dc2626); color: #fff; }
.btn-outline {
    background: transparent; border: 1px solid var(--border-color); color: var(--text-secondary);
}
.btn-outline:hover { border-color: var(--accent-blue); color: #fff; }

/* ===== 结果展示 ===== */
.result-box {
    background: rgba(59,130,246,0.08); border: 1px solid rgba(59,130,246,0.2);
    border-radius: 10px; padding: 1.2rem; margin-top: 1rem;
}
.result-box .result-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.3rem; }
.result-box .result-value {
    font-size: 1.5rem; font-weight: 700; color: var(--accent-blue);
}
.result-box .result-unit { font-size: 0.85rem; color: var(--text-secondary); }

/* ===== 表格 ===== */
.data-table {
    width: 100%; border-collapse: collapse; font-size: 0.85rem;
}
.data-table th {
    background: rgba(59,130,246,0.1); padding: 10px 12px; text-align: left;
    font-weight: 600; color: var(--accent-blue); border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}
.data-table td {
    padding: 8px 12px; border-bottom: 1px solid rgba(255,255,255,0.05);
    color: var(--text-secondary);
}
.data-table tr:hover td { background: rgba(255,255,255,0.02); color: #fff; }
.data-table .highlight { color: var(--accent-blue); font-weight: 600; }

/* ===== Tab 标签 ===== */
.tab-nav { display: flex; gap: 4px; margin-bottom: 1rem; flex-wrap: wrap; }
.tab-btn {
    padding: 8px 18px; border-radius: 8px 8px 0 0; border: 1px solid var(--border-color);
    border-bottom: none; background: transparent; color: var(--text-secondary);
    cursor: pointer; font-size: 0.85rem; transition: all 0.3s;
}
.tab-btn.active { background: var(--bg-card); color: #fff; border-color: var(--accent-blue); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ===== 网格布局 ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .tools-nav { padding: 0 1rem; }
    .tools-nav .nav-links { display: none; }
    .tools-main { padding-left: 1rem; padding-right: 1rem; }
}

/* ===== 页脚 ===== */
.tools-footer {
    background: rgba(10,15,30,0.8); border-top: 1px solid var(--border-color);
    padding: 2rem; text-align: center; color: var(--text-muted); font-size: 0.85rem;
}
.tools-footer a { color: var(--accent-blue); text-decoration: none; }
.tools-footer a:hover { text-decoration: underline; }

/* ===== 工具提示 ===== */
.tooltip { position: relative; cursor: help; border-bottom: 1px dashed var(--text-muted); }
.tooltip:hover::after {
    content: attr(data-tip); position: absolute; bottom: 100%; left: 50%;
    transform: translateX(-50%); background: #1e293b; color: #fff;
    padding: 6px 12px; border-radius: 6px; font-size: 0.8rem;
    white-space: nowrap; z-index: 100; border: 1px solid var(--border-color);
}

/* ===== 首页卡片 ===== */
.tool-index-card {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: 12px; padding: 1.5rem; transition: all 0.3s;
    text-decoration: none; display: block; color: #fff;
}
.tool-index-card:hover {
    border-color: rgba(59,130,246,0.4); transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}
.tool-index-card .card-icon {
    width: 50px; height: 50px; border-radius: 12px; display: flex;
    align-items: center; justify-content: center; margin-bottom: 1rem;
    font-size: 1.3rem;
}
.tool-index-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.3rem; }
.tool-index-card p { font-size: 0.8rem; color: var(--text-secondary); margin: 0; }

/* ===== 通知/警告 ===== */
.alert {
    padding: 12px 16px; border-radius: 8px; margin-bottom: 1rem; font-size: 0.85rem;
}
.alert-info { background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.2); color: var(--accent-blue); }
.alert-warning { background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.2); color: var(--warning); }
.alert-success { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.2); color: var(--success); }

/* ===== 面包屑 ===== */
.breadcrumb {
    display: flex; gap: 0.5rem; margin-bottom: 1.5rem; font-size: 0.85rem;
    color: var(--text-muted);
}
.breadcrumb a { color: var(--accent-blue); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }