/* ===== 百转 站点样式 ===== */
:root{
  --bg:#0f1226; --bg2:#1a1f3c;
  --primary:#6d5efc; --primary2:#00c2ff;
  --accent:#ff5c8a; --accent2:#ffb020;
  --text:#1d2230; --muted:#6b7280; --line:#e7e9f2;
  --card:#ffffff; --soft:#f6f7fb; --ok:#16a34a; --err:#dc2626;
  --shadow:0 10px 30px rgba(20,24,60,.10); --radius:16px;
  --pagebg:#f4f6fc;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Segoe UI",system-ui,-apple-system,"Microsoft YaHei","PingFang SC",Roboto,Helvetica,Arial,sans-serif;
  color:var(--text); background:var(--pagebg,#f4f6fc); line-height:1.6; min-height:100vh;
  transition:background .3s,color .3s;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* 顶栏 */
header.top{
  position:sticky; top:0; z-index:50; backdrop-filter:saturate(1.2) blur(8px);
  background:linear-gradient(120deg,var(--bg),var(--bg2)); color:#fff;
  box-shadow:0 4px 18px rgba(10,12,40,.18);
}
.top-inner{max-width:1180px;margin:0 auto;display:flex;align-items:center;gap:18px;padding:12px 18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:.3px}
.brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--primary2));display:grid;place-items:center;font-size:18px;box-shadow:0 4px 12px rgba(109,94,252,.5)}
nav.main{display:flex;gap:6px;flex:1}
nav.main .menu{position:relative}
nav.main .menu>button{
  background:transparent;color:#eaf; border:0; cursor:pointer; padding:8px 14px; border-radius:10px;
  font-size:15px; font-weight:600; display:flex;align-items:center;gap:6px;
}
nav.main .menu>button:hover{background:rgba(255,255,255,.12)}
nav.main .menu>button .caret{font-size:10px;opacity:.7}
nav.main .drop{
  position:absolute;top:42px;left:0;min-width:230px;background:#fff;color:var(--text);
  border-radius:14px;box-shadow:var(--shadow);padding:8px;display:none;grid-template-columns:1fr 1fr;gap:2px;
  border:1px solid var(--line);
}
nav.main .menu:hover .drop{display:grid}
nav.main .drop a{padding:9px 12px;border-radius:10px;font-size:14px;font-weight:500}
nav.main .drop a:hover{background:var(--soft);color:var(--primary)}
.ls{margin-left:auto;display:flex;align-items:center;gap:6px}
.ls select{background:#fff;color:var(--text);border:1px solid var(--line);border-radius:10px;padding:7px 10px;font-size:14px;cursor:pointer}
.ls .flag{font-size:14px}

/* 首页 */
.hero{max-width:1180px;margin:0 auto;padding:46px 18px 14px;text-align:center}
.hero h1{font-size:40px;line-height:1.15;margin:0 0 12px;background:linear-gradient(120deg,var(--primary),var(--primary2),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:17px;color:var(--muted);max-width:680px;margin:0 auto 8px}
.badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:18px 0 6px}
.badge{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:13px;color:var(--muted);box-shadow:var(--shadow)}
.badge b{color:var(--primary)}

.cats{max-width:1180px;margin:24px auto;padding:0 18px}
.cat{margin-bottom:34px}
.cat h2{font-size:22px;margin:0 0 4px;display:flex;align-items:center;gap:10px}
.cat h2 .dot{width:12px;height:12px;border-radius:4px}
.cat .sub{color:var(--muted);font-size:14px;margin:0 0 16px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.tool-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;
  box-shadow:var(--shadow);transition:.18s transform,.18s box-shadow,.18s border-color;position:relative;overflow:hidden;
}
.tool-card:hover{transform:translateY(-4px);box-shadow:0 16px 38px rgba(20,24,60,.16);border-color:var(--primary)}
.tool-card .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:22px;font-weight:800;color:#fff;margin-bottom:12px}
.tool-card h3{margin:0 0 6px;font-size:17px}
.tool-card p{margin:0;font-size:13px;color:var(--muted);min-height:38px}

/* 工具页 */
main.tool{max-width:880px;margin:0 auto;padding:26px 18px 60px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:10px}
.crumbs b{color:var(--text)}
main.tool h1{font-size:30px;margin:0 0 8px}
.lead{color:var(--muted);margin:0 0 22px;font-size:16px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
#dropZone{
  border:2px dashed var(--line);border-radius:14px;padding:30px;text-align:center;cursor:pointer;
  transition:.15s;background:var(--soft);
}
#dropZone:hover,#dropZone.drag{border-color:var(--primary);background:#eef0ff}
#dropZone .big{font-size:17px;font-weight:600}
#dropZone .small{color:var(--muted);font-size:13px;margin-top:6px}
.filelist{margin:14px 0 0;display:none}
.filelist.show{display:block}
.filelist .fi{display:flex;align-items:center;gap:10px;background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin-bottom:8px}
.filelist .fi .nm{flex:1;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.filelist .fi .rm{cursor:pointer;color:var(--err);font-weight:700;border:0;background:none}
.filelist .fi .sz{color:var(--muted);font-size:12px}

.opts{margin:18px 0}
.opt{margin-bottom:16px}
.opt>label{display:block;font-weight:600;font-size:14px;margin-bottom:7px}
.opt .row{display:flex;gap:10px;flex-wrap:wrap}
.seg{display:flex;gap:8px;flex-wrap:wrap}
.seg label{display:inline-flex;align-items:center;gap:6px;background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:8px 12px;cursor:pointer;font-size:14px}
.seg label input{accent-color:var(--primary)}
.opt input[type=text],.opt input[type=number]{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:14px}
.opt input[type=range]{width:100%}
.opt input[type=color]{width:46px;height:38px;border:1px solid var(--line);border-radius:10px;background:none;cursor:pointer}
.hint{color:var(--muted);font-size:12px;margin-top:5px}

#runBtn{
  width:100%;border:0;cursor:pointer;color:#fff;font-weight:700;font-size:16px;padding:14px;border-radius:12px;
  background:linear-gradient(120deg,var(--primary),var(--primary2));box-shadow:0 8px 22px rgba(109,94,252,.4);
  transition:.15s;
}
#runBtn:disabled{opacity:.6;cursor:wait}
#runBtn:hover:not(:disabled){filter:brightness(1.05)}

#status{margin-top:18px;display:none}
#status.show{display:block}
.bar{height:10px;background:var(--soft);border-radius:999px;overflow:hidden;border:1px solid var(--line)}
.bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--primary),var(--primary2));transition:.2s width}
#status .txt{font-size:13px;color:var(--muted);margin-top:8px}
#status.err .txt{color:var(--err)}

#result{margin-top:18px;display:none}
#result.show{display:block}
#result .ok{background:#ecfdf3;border:1px solid #b7ebc8;color:#0a7c3e;border-radius:12px;padding:16px;display:flex;align-items:center;gap:14px}
#result .ok .dl{margin-left:auto;background:var(--ok);color:#fff;border:0;border-radius:10px;padding:10px 16px;font-weight:700;cursor:pointer}
#result .again{margin-top:12px;background:none;border:1px solid var(--line);border-radius:10px;padding:9px 14px;cursor:pointer;font-size:14px}

.privacy{margin-top:18px;background:#eef0ff;border:1px solid #dfe3ff;color:#3a3f6b;border-radius:12px;padding:12px 14px;font-size:13px;display:flex;gap:8px;align-items:flex-start}

.related{margin-top:34px}
.related h2{font-size:19px;margin:0 0 12px}
.related ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:10px}
.related li a{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;font-size:14px;font-weight:500;box-shadow:var(--shadow)}
.related li a:hover{border-color:var(--primary);color:var(--primary)}

footer.foot{background:var(--bg);color:#cdd2f0;padding:26px 18px;text-align:center;font-size:13px}
footer.foot a{color:#9fb0ff}

/* 根跳转页 */
.gate{max-width:560px;margin:14vh auto;text-align:center;padding:0 20px}
.gate h1{font-size:30px;margin-bottom:8px}
.gate p{color:var(--muted)}
.gate .links{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:22px}
.gate .links a{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 16px;font-weight:600;box-shadow:var(--shadow)}

@media(max-width:720px){
  nav.main{display:none}
  .hero h1{font-size:30px}
  .top-inner{flex-wrap:wrap}
}

/* 全格式互转 nav 链接 */
nav.main .formats-link{color:#fff;font-weight:600;font-size:14px;padding:8px 12px;border-radius:9px;background:rgba(255,138,0,.20);border:1px solid rgba(255,138,0,.55);white-space:nowrap}
nav.main .formats-link:hover{background:rgba(255,138,0,.34)}
/* 矩阵表 */
.matrix-wrap{overflow-x:auto}
.fmt-table{border-collapse:collapse;width:100%;min-width:700px;background:var(--card);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.fmt-table th,.fmt-table td{border:1px solid var(--line);padding:10px 12px;text-align:center;font-size:14px}
.fmt-table thead th{background:linear-gradient(120deg,var(--bg),var(--bg2));color:#fff}
.fmt-table tbody th{background:var(--soft);font-weight:700}
.fmt-table td a{color:var(--primary);font-weight:600}
.fmt-table td a:hover{text-decoration:underline}
.fmt-table td.self{color:var(--muted)}
.fmt-table td.no{color:#c4c8d6}

/* ===== 多主题（data-theme 覆盖 CSS 变量） ===== */
html[data-theme="dark"]{
  --pagebg:#0f1226; --bg:#0b0e1f; --bg2:#161b3a; --card:#161b33; --soft:#1c2244;
  --text:#e8ebf7; --muted:#9aa3c4; --line:#2a3157;
  --primary:#7c6dff; --primary2:#22d3ee; --accent:#ff6b9d; --accent2:#ffc24b;
}
html[data-theme="fresh"]{
  --pagebg:#eafaf4; --bg:#065f46; --bg2:#0e7490; --card:#ffffff; --soft:#f0fdf9;
  --text:#0f2e26; --muted:#5b7a72; --line:#d6efe6;
  --primary:#10b981; --primary2:#22d3ee; --accent:#f59e0b; --accent2:#34d399;
}
html[data-theme="sunset"]{
  --pagebg:#fff6ee; --bg:#7c2d12; --bg2:#be123c; --card:#ffffff; --soft:#fff3ea;
  --text:#3a2418; --muted:#8a6b54; --line:#ffe2cf;
  --primary:#ff8a00; --primary2:#ff5c8a; --accent:#ffb020; --accent2:#ff7a59;
}
html[data-theme="minimal"]{
  --pagebg:#f8fafc; --bg:#1e293b; --bg2:#334155; --card:#ffffff; --soft:#f1f5f9;
  --text:#1e293b; --muted:#64748b; --line:#e2e8f0;
  --primary:#64748b; --primary2:#94a3b8; --accent:#0ea5e9; --accent2:#38bdf8;
}

/* ===== 广告位（前台运行时填充） ===== */
.ad-slot{display:none}
.ad-slot.show{display:block;position:relative;margin:18px 0;background:var(--soft);border:1px dashed var(--line);border-radius:12px;padding:18px;text-align:center}
.ad-slot .ad-tag{position:absolute;top:-9px;left:10px;font-size:10px;background:#cbd5e1;color:#475569;padding:1px 6px;border-radius:6px;letter-spacing:.5px}
.ad-slot a{display:inline-block;color:var(--primary);font-weight:600}

/* ===== 主题切换器（悬浮，用户选择记忆在 localStorage） ===== */
.theme-switch{position:fixed;left:14px;bottom:14px;z-index:60;background:var(--card);border:1px solid var(--line);border-radius:999px;box-shadow:var(--shadow);padding:6px 12px;display:flex;align-items:center;gap:8px}
.theme-switch .ts-label{font-size:12px;color:var(--muted)}
.theme-switch .ts-dot{width:20px;height:20px;border-radius:50%;border:2px solid transparent;cursor:pointer;outline:none;padding:0}
.theme-switch .ts-dot.active{border-color:var(--text)}
@media(max-width:720px){ .theme-switch{left:8px;bottom:8px;padding:5px 8px} .theme-switch .ts-label{display:none} }