/* =====================================================================
   历路行 · 在线工具箱 — 统一组件库
   与官网首页同源设计语言：深色科技风 + 天蓝点缀 + 毛玻璃 + 主题切换
   规划：变量 → 基础 → 导航 → 横幅 → 布局 → 卡片 → 表单 → 按钮 → 工具页
   组件 → 反馈 → 打印。扩展新工具时直接复用，勿覆盖既有规则。
   ===================================================================== */

/* ---------- 1. 主题变量（与官网 index.php 完全同源） ---------- */
:root {
    --bg-primary: #020617;                       /* 深夜蓝底 */
    --bg-secondary: #0f172a;                     /* 卡面深蓝 */
    --text-main: #f8fafc;                        /* 主文字 */
    --text-sub: #94a3b8;                         /* 次级文字 */
    --accent: #38bdf8;                           /* 天蓝强调 */
    --accent-glow: rgba(56, 189, 248, 0.4);      /* 强调光晕 */
    --nav-bg: rgba(2, 6, 23, 0.8);               /* 毛玻璃导航底 */
    --card-bg: rgba(30, 41, 59, 0.5);            /* 半透明卡面 */
    --border: rgba(255, 255, 255, 0.1);          /* 细边框 */
    --radius: 16px;                              /* 卡片圆角 */
    --radius-sm: 10px;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
    --success: #34d399;
    --danger: #f87171;
    --warning: #fbbf24;
}
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-main: #0f172a;
    --text-sub: #64748b;
    --accent: #0284c7;
    --accent-glow: rgba(2, 132, 199, 0.2);
    --nav-bg: rgba(248, 250, 252, 0.95);
    --card-bg: #ffffff;
    --border: rgba(0, 0, 0, 0.08);
    --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

/* ---------- 2. 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'PingFang SC', 'Inter', 'Microsoft YaHei', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ---------- 3. 顶部导航（官网同款毛玻璃） ---------- */
.navbar {
    position: sticky; top: 0; z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    max-width: 1200px; margin: 0 auto; padding: 0 20px;
    height: 64px; display: flex; align-items: center; justify-content: space-between;
    gap: 12px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 18px; letter-spacing: 1px; }
.nav-logo .logo-icon {
    width: 34px; height: 34px; border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), #818cf8);
    color: #fff; display: flex; align-items: center; justify-content: center;
    font-size: 15px; box-shadow: 0 4px 14px var(--accent-glow);
}
.nav-logo .logo-text {
    background: linear-gradient(to right, var(--accent), #818cf8);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-right { display: flex; align-items: center; gap: 8px; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a {
    padding: 7px 14px; border-radius: 9px; font-size: 14px;
    color: var(--text-sub); font-weight: 500; transition: all 0.3s; opacity: 0.85;
}
.nav-links a:hover { opacity: 1; color: var(--accent); background: rgba(56, 189, 248, 0.08); }
.nav-links a.active { color: var(--accent); font-weight: 600; opacity: 1; }

/* 主题切换（官网同款胶囊开关） */
.theme-toggle {
    cursor: pointer; width: 54px; height: 28px;
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: 20px; position: relative;
    display: flex; align-items: center; padding: 0 4px;
    transition: background-color 0.4s ease, border-color 0.4s ease;
}
.theme-toggle .toggle-ball {
    width: 20px; height: 20px; background: var(--accent); border-radius: 50%;
    transition: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 10px;
}
[data-theme="light"] .theme-toggle .toggle-ball { transform: translateX(24px); }

/* ---------- 4. 页头横幅（深蓝渐变，继承官网按钮风格） ---------- */
.page-banner {
    background: linear-gradient(135deg, #0c4a6e 0%, #0369a1 50%, #38bdf8 100%);
    color: #fff; padding: 42px 20px 38px; position: relative; overflow: hidden;
}
.page-banner::after {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(600px 200px at 85% 0%, rgba(255,255,255,0.15), transparent 60%);
    pointer-events: none;
}
.page-banner .inner { max-width: 1200px; margin: 0 auto; position: relative; }
.page-banner h1 { font-size: 26px; font-weight: 900; letter-spacing: 1px; }
.page-banner p { margin-top: 8px; font-size: 14px; opacity: 0.85; }
.page-banner .crumbs { font-size: 12.5px; opacity: 0.7; margin-bottom: 8px; display: inline-flex; align-items: center; gap: 6px; }
.page-banner .crumbs a:hover { text-decoration: underline; }

/* ---------- 5. 主体布局 ---------- */
.main { max-width: 1200px; width: 100%; margin: 0 auto; padding: 30px 20px 70px; flex: 1; }

/* ---------- 6. 分类与工具卡片（入口页） ---------- */
.cat-section { margin-bottom: 42px; }
.cat-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.cat-head .cat-icon {
    width: 36px; height: 36px; border-radius: var(--radius-sm);
    background: var(--accent-glow); color: var(--accent);
    display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.cat-head h2 { font-size: 19px; font-weight: 800; }
.cat-head .cat-count {
    font-size: 12px; color: var(--text-sub);
    background: var(--bg-secondary); border: 1px solid var(--border);
    padding: 2px 10px; border-radius: 20px;
}
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}
.tool-card {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 18px 16px;
    display: flex; flex-direction: column; gap: 7px;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background-color 0.4s ease;
    overflow: hidden;
}
.tool-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--accent), #818cf8);
    opacity: 0; transition: opacity 0.25s;
}
.tool-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 15px 35px var(--accent-glow);
}
.tool-card:hover::before { opacity: 1; }
.tool-card h3 { font-size: 15.5px; font-weight: 700; display: flex; align-items: center; gap: 9px; }
.tool-card h3 .t-ico {
    color: var(--accent); font-size: 15px; width: 20px; text-align: center;
    flex-shrink: 0;
}
.tool-card p { font-size: 13px; color: var(--text-sub); flex: 1; }
.tool-card .go {
    margin-top: 4px; font-size: 12.5px; color: var(--accent);
    display: inline-flex; align-items: center; gap: 5px; font-weight: 600;
}
.tool-card .go i { transition: transform 0.25s; }
.tool-card:hover .go i { transform: translateX(3px); }

/* 搜索框（入口页顶部） */
.search-bar { position: relative; max-width: 460px; margin: 0 auto 34px; }
.search-bar i {
    position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
    color: var(--text-sub); font-size: 14px;
}
.search-bar input {
    width: 100%; padding: 12px 18px 12px 40px;
    border-radius: 50px; border: 1px solid var(--border);
    background: var(--card-bg); color: var(--text-main); font-size: 14px;
    outline: none; transition: border-color 0.25s, box-shadow 0.25s;
}
.search-bar input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.search-bar input::placeholder { color: var(--text-sub); }

/* ---------- 7. 表单组件（全站统一，固定完整） ---------- */
.field { margin-bottom: 16px; }
.field label {
    display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 7px; color: var(--text-main);
}
.field label .hint { font-weight: 400; color: var(--text-sub); font-size: 12px; margin-left: 6px; }
.input, .select, textarea.input {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-main);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.25s, box-shadow 0.25s;
}
.input:focus, .select:focus, textarea.input:focus {
    border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.input::placeholder, textarea.input::placeholder { color: var(--text-sub); }
.select { appearance: none; -webkit-appearance: none; cursor: pointer; padding-right: 34px; }
.select-wrap { position: relative; display: inline-block; width: 100%; }
.select-wrap::after {
    content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
    position: absolute; right: 13px; top: 50%; transform: translateY(-50%);
    font-size: 11px; color: var(--text-sub); pointer-events: none;
}
textarea.input { resize: vertical; min-height: 130px; line-height: 1.6; }
textarea.code {
    font-family: 'JetBrains Mono', 'Cascadia Code', Consolas, monospace;
    font-size: 13px; tab-size: 2;
}
input[type="range"] {
    -webkit-appearance: none; appearance: none;
    width: 100%; height: 5px; border-radius: 3px;
    background: var(--border); outline: none; margin: 10px 0;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 16px; height: 16px; border-radius: 50%;
    background: var(--accent); cursor: pointer;
    box-shadow: 0 0 0 4px var(--accent-glow);
    transition: transform 0.2s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
input[type="color"] {
    -webkit-appearance: none; appearance: none;
    width: 42px; height: 34px; border: none; border-radius: 8px;
    background: none; cursor: pointer; padding: 0;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch { border: 1px solid var(--border); border-radius: 8px; }
input[type="file"] { display: none; }
input[type="checkbox"], input[type="radio"] { accent-color: var(--accent); width: 15px; height: 15px; cursor: pointer; }
.check-line { display: flex; align-items: center; gap: 8px; font-size: 13.5px; cursor: pointer; }

/* ---------- 8. 按钮体系 ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 11px 24px; border-radius: 50px; border: none;
    font-size: 14px; font-weight: 600; font-family: inherit;
    cursor: pointer; transition: all 0.3s; text-decoration: none; line-height: 1.4;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
    background: var(--accent); color: #fff;
    box-shadow: 0 10px 25px var(--accent-glow);
}
.btn-primary:hover { transform: scale(1.04); box-shadow: 0 14px 32px var(--accent-glow); }
.btn-ghost {
    background: transparent; color: var(--text-main);
    border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; transform: scale(1.04); }
.btn-sm { padding: 7px 16px; font-size: 12.5px; }
.btn-lg { padding: 14px 34px; font-size: 15px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0; }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; transform: none !important; }

/* ---------- 9. 工具页通用组件 ---------- */
/* 工具主体容器 */
.tool-body { flex: 1; width: 100%; }
.tool-frame {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px clamp(16px, 4vw, 44px);
    max-width: 1200px; margin: 0 auto;
}
.tool-intro {
    font-size: 13.5px; color: var(--text-sub); margin-bottom: 22px;
    padding-bottom: 16px; border-bottom: 1px dashed var(--border);
    line-height: 1.8;
}

/* 双栏工作区（输入区 + 结果区） */
.work-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.work-grid.single { grid-template-columns: 1fr; }
.work-grid > div { min-width: 0; }

/* 上传拖拽区 */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 44px 20px; text-align: center; cursor: pointer;
    color: var(--text-sub); transition: all 0.25s; background: rgba(56, 189, 248, 0.02);
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent); color: var(--accent);
    background: rgba(56, 189, 248, 0.06);
}
.upload-zone i { font-size: 36px; margin-bottom: 12px; display: block; opacity: 0.7; }
.upload-zone.dragover { border-style: solid; }
.upload-zone p { font-size: 14px; }
.upload-zone .sub { font-size: 12px; margin-top: 6px; opacity: 0.7; }

/* 结果输出区 */
.result-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px; font-size: 13.5px;
    overflow: auto; max-height: 480px;
    font-family: 'JetBrains Mono', 'Cascadia Code', Consolas, monospace;
}
.result-box.plain { font-family: inherit; }

/* 状态徽标与统计行 */
.stat-row {
    display: flex; flex-wrap: wrap; gap: 10px 22px;
    font-size: 12.5px; color: var(--text-sub);
    padding: 10px 14px; border-radius: var(--radius-sm);
    background: var(--bg-secondary); border: 1px solid var(--border);
    margin-bottom: 16px;
}
.stat-row b { color: var(--accent); font-weight: 700; }
.stat-row .sep { opacity: 0.35; }

/* 标签页 */
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--border); margin-bottom: 20px; flex-wrap: wrap; }
.tabs button {
    padding: 9px 18px; background: none; border: none; cursor: pointer;
    font-size: 13.5px; font-family: inherit; color: var(--text-sub);
    border-bottom: 2px solid transparent; margin-bottom: -1px; transition: all 0.25s;
    font-weight: 500;
}
.tabs button:hover { color: var(--text-main); }
.tabs button.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 700; }

/* 选项行（工具页配置项集合） */
.opt-row {
    display: flex; flex-wrap: wrap; gap: 14px 24px; align-items: center;
    padding: 14px 16px; border-radius: var(--radius-sm);
    background: var(--bg-secondary); border: 1px solid var(--border);
    margin-bottom: 18px;
}
.opt-row .opt { display: flex; align-items: center; gap: 8px; font-size: 13.5px; }
.opt-row .opt b { font-weight: 600; }

/* 预览画布/图片区 */
.preview-area {
    background:
        linear-gradient(45deg, var(--bg-secondary) 25%, transparent 25%, transparent 75%, var(--bg-secondary) 75%),
        linear-gradient(45deg, var(--bg-secondary) 25%, transparent 25%, transparent 75%, var(--bg-secondary) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 18px; text-align: center; overflow: auto;
}
.preview-area img, .preview-area canvas { max-width: 100%; border-radius: 6px; }
.preview-area .placeholder { color: var(--text-sub); font-size: 13px; padding: 40px 0; }

/* 复制提示浮动层 */
.copy-toast {
    position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%) translateY(20px);
    background: var(--bg-secondary); color: var(--text-main);
    border: 1px solid var(--accent); border-radius: 50px;
    padding: 10px 24px; font-size: 13.5px; z-index: 9999;
    opacity: 0; pointer-events: none; transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}
.copy-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 10. 页脚 ---------- */
.footer {
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
    padding: 26px 20px; text-align: center;
    font-size: 13px; color: var(--text-sub);
}
.footer a { color: var(--accent); }
.footer a:hover { text-decoration: underline; }

/* ---------- 11. 响应式与打印 ---------- */
@media (max-width: 900px) {
    .work-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .nav-logo span.logo-text { display: none; }
    .nav-links a { padding: 7px 9px; font-size: 13px; }
    .tool-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
    .page-banner { padding: 28px 16px; }
    .page-banner h1 { font-size: 20px; }
    .tool-frame { padding: 22px 14px; }
    .btn { padding: 10px 18px; }
    .search-bar { margin-bottom: 24px; }
}
@media (hover: none) and (pointer: coarse) {
    .tool-card:hover { transform: none; box-shadow: none; }
    .btn-primary:hover, .btn-danger:hover { transform: none; }
}
@media print {
    .navbar, .footer, .page-banner, .copy-toast { display: none !important; }
    body { background: #fff; color: #000; }
    .tool-frame { border: none; box-shadow: none; padding: 0; }
}