/* ============================================================
   在线工具箱 - 全站样式（自研实现，低饱和扁平风格，PC/移动端响应式）
   ============================================================ */
:root{
  --bg:#f6f7f9; --card:#ffffff; --text:#2b3340; --muted:#7b8594;
  --line:#e7eaf0; --primary:#5b7cfa; --primary-soft:#e9edff;
  --ok:#2f9e6e; --warn:#c98a1b; --err:#d0544c;
  --radius:12px; --radius-s:8px;
  --shadow:0 1px 2px rgba(28,36,54,.04),0 4px 14px rgba(28,36,54,.06);
  --cat-image:#e8f1fb; --cat-dev:#efeafd; --cat-text:#e9f6ec; --cat-query:#fdf3e6;
  --cat-doc:#e6f4f4; --cat-audio:#fdeef2; --cat-music:#fdecf2; --cat-video:#fdecea;
  --cat-other:#eef1f4; --cat-ops:#e3f4fb; --cat-academic:#fbf1e2; --cat-design:#eef0fc;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;
  background:var(--bg); color:var(--text); font-size:15px; line-height:1.6;
}
a{color:var(--primary); text-decoration:none}
.container{max-width:1180px; margin:0 auto; padding:0 16px}

/* ---------- 顶栏 ---------- */
.site-header{background:#fff; border-bottom:1px solid var(--line); position:sticky; top:0; z-index:50}
.header-inner{display:flex; align-items:center; gap:16px; height:56px}
.logo{font-size:18px; font-weight:700; color:var(--text); display:flex; align-items:center; gap:8px}
.logo-ico{font-size:22px}
.ico{width:22px; height:22px; display:block}
.logo-ico .ico{color:var(--primary)}
.nav-toggle .ico{width:18px; height:18px; color:var(--muted); display:block}
.title-ico{width:19px; height:19px; color:var(--primary); display:block}
.hot-ico{color:#ef5b3d}
/* ---------- 原创 SVG 图标系统 ---------- */
.tool-icon .t-ico{width:26px; height:26px; display:block}
.tool-card[data-cat="image"] .t-ico{color:#2f6fe0}
.tool-card[data-cat="dev"] .t-ico{color:#6a4fe0}
.tool-card[data-cat="text"] .t-ico{color:#2c9668}
.tool-card[data-cat="query"] .t-ico{color:#c26a02}
.tool-card[data-cat="doc"] .t-ico{color:#0c8f8f}
.tool-card[data-cat="audio"] .t-ico{color:#c93d63}
.tool-card[data-cat="music"] .t-ico{color:#d13a89}
.tool-card[data-cat="video"] .t-ico{color:#df4a2c}
.tool-card[data-cat="other"] .t-ico{color:#4e5a6a}
.tool-card[data-cat="ops"] .t-ico{color:#0a72a0}
.tool-card[data-cat="academic"] .t-ico{color:#ad6f16}
.tool-card[data-cat="design"] .t-ico{color:#8a4fd8}
.h-ico{width:26px; height:26px; color:var(--primary); vertical-align:-5px; margin-right:4px}
.site-nav{display:flex; gap:4px; margin-left:auto; flex-wrap:wrap}
.site-nav a{color:var(--muted); padding:6px 10px; border-radius:8px; font-size:14px}
.site-nav a:hover{color:var(--primary); background:var(--primary-soft)}
.nav-toggle{display:none; background:none; border:1px solid var(--line); border-radius:8px; font-size:18px; padding:4px 10px; cursor:pointer}

/* ---------- 首页 Hero ---------- */
.hero{text-align:center; padding:44px 0 8px}
.hero h1{font-size:30px; margin:0 0 8px}
.hero-sub{color:var(--muted); margin:0 0 22px}
.hero-search{max-width:520px; margin:0 auto}
.hero-search input{
  width:100%; padding:12px 16px; border:1px solid var(--line); border-radius:999px;
  font-size:15px; background:#fff; outline:none; box-shadow:var(--shadow);
}
.hero-search input:focus{border-color:var(--primary)}
.quick-nav{display:flex; gap:10px; justify-content:center; flex-wrap:wrap; margin-top:18px}
.quick-nav a{font-size:13px; color:var(--muted); background:#fff; border:1px solid var(--line); border-radius:999px; padding:5px 14px}
.quick-nav a:hover{color:var(--primary); border-color:var(--primary)}

/* ---------- 分类小节 ---------- */
.hot-section{margin-top:34px}
.section-title{font-size:19px; font-weight:700; margin:30px 0 14px; display:flex; align-items:center; gap:8px}
.section-count{font-size:12px; color:var(--muted); font-weight:400; background:#fff; border:1px solid var(--line); border-radius:999px; padding:1px 10px}

/* ---------- 工具卡片 ---------- */
.tool-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:14px}
.tool-card{
  display:flex; align-items:flex-start; gap:12px; background:var(--card); border:1px solid var(--line);
  border-radius:var(--radius); padding:14px; box-shadow:var(--shadow);
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease; color:var(--text);
}
.tool-card:hover{transform:translateY(-3px); box-shadow:0 6px 22px rgba(28,36,54,.10); border-color:var(--primary)}
.tool-icon{
  width:44px; height:44px; flex:0 0 44px; border-radius:10px; display:flex; align-items:center; justify-content:center;
  font-size:24px; background:#eef1f4;
}
.tool-card[data-cat="image"] .tool-icon{background:var(--cat-image)}
.tool-card[data-cat="dev"] .tool-icon{background:var(--cat-dev)}
.tool-card[data-cat="text"] .tool-icon{background:var(--cat-text)}
.tool-card[data-cat="query"] .tool-icon{background:var(--cat-query)}
.tool-card[data-cat="doc"] .tool-icon{background:var(--cat-doc)}
.tool-card[data-cat="audio"] .tool-icon{background:var(--cat-audio)}
.tool-card[data-cat="music"] .tool-icon{background:var(--cat-music)}
.tool-card[data-cat="video"] .tool-icon{background:var(--cat-video)}
.tool-card[data-cat="other"] .tool-icon{background:var(--cat-other)}
.tool-card[data-cat="ops"] .tool-icon{background:var(--cat-ops)}
.tool-card[data-cat="academic"] .tool-icon{background:var(--cat-academic)}
.tool-card[data-cat="design"] .tool-icon{background:var(--cat-design)}
.tool-meta{display:flex; flex-direction:column; gap:4px; min-width:0; flex:1}
.tool-name{font-weight:600; font-size:15px; display:flex; align-items:center; gap:6px; flex-wrap:wrap}
.tool-desc{color:var(--muted); font-size:12.5px; line-height:1.5; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden}
.tool-cat{color:var(--primary); font-size:11.5px; background:var(--primary-soft); border-radius:999px; padding:1px 9px; align-self:flex-start}
.tool-go{margin-left:auto; align-self:center; color:var(--muted); font-size:13px; white-space:nowrap}
.tool-card:hover .tool-go{color:var(--primary)}
.api-tag{font-style:normal; font-size:10.5px; color:#8a6d1a; background:#fdf3d7; border:1px solid #f2e2ac; border-radius:6px; padding:0 5px}

/* ---------- 筛选条 ---------- */
.filter-bar{display:flex; gap:8px; flex-wrap:wrap; margin:26px 0 6px; position:sticky; top:56px; z-index:40; background:var(--bg); padding:10px 0}
.chip{font-size:13px; border:1px solid var(--line); background:#fff; color:var(--muted); border-radius:999px; padding:5px 14px; cursor:pointer}
.chip:hover{color:var(--primary); border-color:var(--primary)}
.chip.active{background:var(--primary); border-color:var(--primary); color:#fff}
.cat-section.hidden{display:none}

/* ---------- 工具页通用 ---------- */
.main{padding-bottom:60px}
.tool-header{padding:26px 0 10px}
.crumb{font-size:12.5px; color:var(--muted); margin-bottom:10px; display:flex; gap:6px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.tool-header h1{font-size:26px; margin:0 0 8px}
.tool-sub{color:var(--muted); margin:0 0 4px}
.api-note{color:#8a6d1a; font-size:13px}
.tool-body{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:20px; box-shadow:var(--shadow)}
.tool-body.center{text-align:center}

/* ---------- 表单控件 ---------- */
label{font-size:13.5px; color:var(--text); font-weight:500; display:block; margin:12px 0 6px}
input[type=text],input[type=number],input[type=url],input[type=search],input[type=password],
select,textarea{
  width:100%; padding:9px 12px; border:1px solid var(--line); border-radius:var(--radius-s);
  font-size:14px; background:#fbfcfe; outline:none; font-family:inherit;
}
input:focus,select:focus,textarea:focus{border-color:var(--primary); background:#fff}
textarea{resize:vertical; min-height:120px; line-height:1.55}
.field-row{display:flex; gap:12px; flex-wrap:wrap}
.field-row>div{flex:1; min-width:160px}
.btn{
  display:inline-block; background:var(--primary); color:#fff; border:none; border-radius:var(--radius-s);
  padding:9px 20px; font-size:14px; cursor:pointer; transition:opacity .15s;
}
.btn:hover{opacity:.88}
.btn.secondary{background:#fff; color:var(--text); border:1px solid var(--line)}
.btn.success{background:var(--ok)}
.btn.danger{background:var(--err)}
.btn.block{width:100%; text-align:center}
.btn:disabled{opacity:.5; cursor:not-allowed}
.actions{display:flex; gap:10px; flex-wrap:wrap; margin-top:14px}
.result{margin-top:16px}
.result-box{
  background:#f8fafc; border:1px solid var(--line); border-radius:var(--radius-s);
  padding:12px 14px; font-size:13.5px; white-space:pre-wrap; word-break:break-all;
  max-height:420px; overflow:auto; font-family:Consolas,"Courier New",monospace;
}
.result-img{max-width:100%; max-height:480px; border-radius:8px; border:1px solid var(--line); display:block; margin:12px 0}
.tip{font-size:12.5px; color:var(--muted); margin-top:8px}
.banner{border-radius:var(--radius-s); padding:10px 14px; margin:12px 0; font-size:13.5px; display:none}
.banner.show{display:block}
.banner.warn{background:#fdf6e6; border:1px solid #f0e0b8; color:#8a6d1a}
.banner.ok{background:#e9f6ec; border:1px solid #c6e6d1; color:#2f6e4e}
.banner.err{background:#fdecea; border:1px solid #f2c6c2; color:#a04842}
.code-area{font-family:Consolas,"Courier New",monospace; font-size:13px}

/* 上传控件 */
.drop-zone{
  border:2px dashed var(--line); border-radius:var(--radius); padding:30px 16px; text-align:center;
  color:var(--muted); cursor:pointer; transition:border-color .15s, background .15s; background:#fbfcfe;
}
.drop-zone:hover,.drop-zone.over{border-color:var(--primary); background:var(--primary-soft)}
.drop-zone input[type=file]{display:none}

/* 表格 */
.tool-table{width:100%; border-collapse:collapse; font-size:13.5px; background:#fff}
.tool-table th,.tool-table td{border:1px solid var(--line); padding:7px 10px; text-align:left; vertical-align:top}
.tool-table th{background:#f4f6fa; font-weight:600; position:sticky; top:106px}
.tool-table tr:nth-child(even) td{background:#fafbfd}

/* 弹层/面板 */
.panel{border:1px solid var(--line); border-radius:var(--radius-s); padding:14px; margin-top:12px; background:#fbfcfe}
.muted{color:var(--muted)}
.small{font-size:12.5px}
.mt12{margin-top:12px}.mt16{margin-top:16px}

/* ---------- 响应式 ---------- */
@media (max-width:760px){
  .site-nav{display:none; position:absolute; top:56px; left:0; right:0; background:#fff; border-bottom:1px solid var(--line); flex-direction:column; padding:10px 16px; gap:2px}
  .site-nav.open{display:flex}
  .nav-toggle{display:block; margin-left:auto}
  .tool-grid{grid-template-columns:repeat(auto-fill,minmax(100%,1fr))}
  .hero{padding-top:30px}
  .hero h1{font-size:24px}
  .filter-bar{top:56px}
  .tool-table th{position:static}
}
@media (max-width:480px){
  .tool-grid{grid-template-columns:1fr}
  .container{padding:0 12px}
  .tool-card{padding:12px}
}