:root{
  --bg:#0B0B12;
  --card:#14141F;
  --footer:#0E0E17;
  --card-border:rgba(255,255,255,0.07);
  --line:rgba(255,255,255,0.07);
  --text:#F5F5F7;
  --text-2:#A6A6BD;
  --text-3:#9999B2;
  --text-4:#808099;
  --chip:#C7C7D9;
  --purple:#8B5CF6;
  --green:#22C55E;
  --brown:#B08D57;
  --pi:#E5E7EB;
  --g-purple:rgba(139,92,246,.14);
  --g-green:rgba(34,197,94,.14);
  --g-brown:rgba(176,141,87,.14);
  --g-pi:rgba(229,231,235,.12);
  --border-soft:rgba(255,255,255,.07);
  --nav-bg:rgba(11,11,18,.92);
  --radius:18px;
  --shadow:0 12px 24px rgba(0,0,0,.35);
  --field-bg:#1A1A26;
  --pre-bg:#0D0D15;
  --danger:#F87171;
}
:root[data-theme="light"]{
  --bg:#FAFAFB;
  --card:#FFFFFF;
  --footer:#F2F2F5;
  --card-border:rgba(0,0,0,.08);
  --line:rgba(0,0,0,.08);
  --text:#1A1A24;
  --text-2:#4A4A5E;
  --text-3:#66667E;
  --text-4:#8A8AA0;
  --chip:#3A3A4A;
  --border-soft:rgba(0,0,0,.08);
  --nav-bg:rgba(255,255,255,.92);
  --pi:#111827;
  --g-pi:rgba(17,24,39,.12);
  --field-bg:#F7F7FA;
  --pre-bg:#F4F4F7;
  --danger:#DC2626;
  --shadow:0 12px 24px rgba(0,0,0,.08);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);color:var(--text);
  font-family:"Noto Sans SC","Inter",sans-serif;
  -webkit-font-smoothing:antialiased;line-height:1.6;overflow-x:hidden;
}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}
.wrap{width:1200px;max-width:calc(100% - 64px);margin:0 auto;}

/* ===== accent theme ===== */
.accent-purple{--accent:var(--purple);--g-accent:var(--g-purple);}
.accent-brown{--accent:var(--brown);--g-accent:var(--g-brown);}
.accent-green{--accent:var(--green);--g-accent:var(--g-green);}
.accent-pi{--accent:var(--pi);--g-accent:var(--g-pi);}

/* ===== Navbar ===== */
.nav{position:sticky;top:0;z-index:50;background:var(--nav-bg);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);}
.nav-inner{height:76px;display:flex;align-items:center;justify-content:space-between;}
.logo{display:flex;align-items:center;gap:10px;font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:20px;color:var(--text);}
.logo-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,#8B5CF6,#B08D57);color:#fff;display:flex;align-items:center;justify-content:center;}
.nav-links{display:flex;align-items:center;gap:32px;font-size:15px;font-weight:500;color:var(--text-2);}
.nav-links a:hover{color:var(--text);transition:color .2s;}
.nav-right{display:flex;align-items:center;gap:14px;}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--text-2);cursor:pointer;transition:color .2s,border-color .2s;}
.theme-toggle:hover{color:var(--text);border-color:var(--purple);}
.theme-toggle svg{display:none;}
.theme-toggle[data-theme-now="dark"] .icon-moon{display:block;}
.theme-toggle[data-theme-now="light"] .icon-sun{display:block;}
.nav-cta{background:var(--purple);color:#fff;font-family:"Inter";font-weight:600;font-size:15px;padding:10px 20px;border-radius:10px;}
.nav-cta:hover{filter:brightness(1.1);transition:filter .2s;}

/* ===== Breadcrumb ===== */
.breadcrumb{padding:24px 0 0;font-size:13px;color:var(--text-3);}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--text);}
.breadcrumb span{color:var(--text-4);margin:0 8px;}

/* ===== 工具页头 ===== */
.tool-hero{display:flex;justify-content:center;padding:72px 0 8px;}
.tool-head{display:flex;flex-direction:column;align-items:center;text-align:center;gap:14px;}
.kicker{font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase;}
.kicker.purple{color:var(--purple);}
.kicker.brown{color:var(--brown);}
.kicker.green{color:var(--green);}
.kicker.pi{color:var(--pi);}
.tool-title{font-size:40px;font-weight:700;color:var(--text);letter-spacing:-.01em;}
.tool-sub{font-size:16px;color:var(--text-2);max-width:560px;line-height:1.8;}

.tool-main{padding:40px 0 120px;}

/* ===== 工具广场 ===== */
.tools-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:1000px;margin:0 auto;}
.tool-card{display:flex;flex-direction:column;gap:12px;background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;transition:border-color .2s,transform .2s;}
.tool-card:hover{border-color:var(--accent);transform:translateY(-3px);}
.tool-icon{width:46px;height:46px;border-radius:13px;background:var(--g-accent);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:19px;font-family:"JetBrains Mono","SFMono-Regular",Consolas,monospace;font-weight:700;}
.tool-card h2{font-size:20px;font-weight:700;color:var(--text);}
.tool-card p{font-size:14px;color:var(--text-3);line-height:1.7;}
.tool-go{display:inline-flex;align-items:center;gap:6px;margin-top:auto;font-size:14px;font-weight:600;color:var(--accent);}
.tool-go .arrow{font-family:"Inter";font-weight:600;}

/* ===== 工具面板 ===== */
.tool-panel{max-width:920px;margin:0 auto;display:flex;flex-direction:column;gap:22px;background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px;}
.field{display:flex;flex-direction:column;gap:8px;min-width:0;}
.field label{font-size:13px;font-weight:600;color:var(--text-2);}
.field-row{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:end;}
.field.grow{min-width:0;}
input[type="text"],input[type="number"],input[type="date"],textarea,select{
  background:var(--field-bg);border:1px solid var(--line);color:var(--text);
  border-radius:10px;padding:10px 14px;font-size:14px;outline:none;transition:border-color .2s;
  font-family:"JetBrains Mono","SFMono-Regular",Consolas,monospace;
}
input:focus,textarea:focus,select:focus{border-color:var(--accent);}
textarea{resize:vertical;min-height:170px;line-height:1.7;}
textarea[readonly]{cursor:default;}
select{font-family:"Noto Sans SC","Inter",sans-serif;cursor:pointer;}
input[type="color"]{width:48px;height:48px;border:1px solid var(--line);border-radius:10px;padding:4px;background:var(--field-bg);cursor:pointer;}
input[type="range"]{width:100%;accent-color:var(--accent);}
.range-row{display:flex;align-items:center;gap:14px;}
.range-row label{flex:none;width:64px;font-size:13px;font-weight:600;color:var(--text-2);}
.range-row output{flex:none;width:72px;text-align:right;font-family:"JetBrains Mono",Consolas,monospace;font-size:13px;color:var(--text-2);}

.btn-row{display:flex;gap:10px;flex-wrap:wrap;}
.tbtn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:var(--field-bg);color:var(--text-2);font-size:14px;font-weight:500;padding:9px 18px;border-radius:10px;cursor:pointer;transition:color .2s,border-color .2s,filter .2s;font-family:"Noto Sans SC","Inter",sans-serif;}
.tbtn:hover{color:var(--text);border-color:var(--accent);}
.tbtn.primary{background:var(--purple);border-color:var(--purple);color:#fff;}
.tbtn.primary:hover{filter:brightness(1.1);color:#fff;}
.tbtn:disabled{opacity:.5;cursor:not-allowed;}

.input-copy{position:relative;display:flex;align-items:stretch;gap:8px;}
.input-copy input,.input-copy textarea{flex:1;min-width:0;}
.input-copy .tbtn{flex:none;}

.swatch{height:110px;border-radius:14px;border:1px solid var(--line);}

.code-out{background:var(--pre-bg);border:1px solid var(--line);border-radius:12px;padding:16px 18px;font-family:"JetBrains Mono","SFMono-Regular",Consolas,monospace;font-size:13px;color:var(--text);line-height:1.7;overflow-x:auto;white-space:pre-wrap;word-break:break-all;}

.status{font-size:13px;color:var(--text-3);min-height:18px;line-height:1.7;}
.status.ok{color:var(--green);}
.status.err{color:var(--danger);}

.disclaimer{display:flex;gap:12px;align-items:flex-start;padding:14px 18px;border-radius:12px;border:1px solid rgba(217,119,87,.4);background:rgba(217,119,87,.08);color:#F5A97F;font-size:13.5px;line-height:1.7;}
.disclaimer b{color:#F5A97F;flex:none;}

/* ===== 阴影生成器 ===== */
.shadow-stage{height:260px;border-radius:14px;border:1px dashed var(--line);background:var(--pre-bg);display:flex;align-items:center;justify-content:center;}
.shadow-box{width:190px;height:120px;border-radius:14px;background:linear-gradient(135deg,#8B5CF6,#22C55E);}
.checks-row{display:flex;align-items:center;gap:10px;}
.checks-row input[type="checkbox"]{accent-color:var(--accent);width:18px;height:18px;}
.checks-row label{font-size:14px;color:var(--text-2);}
.presets-row{display:flex;gap:8px;flex-wrap:wrap;}

/* ===== 身份证生成器 ===== */
.id-out{font-family:"JetBrains Mono",Consolas,monospace;font-size:26px;font-weight:700;letter-spacing:.08em;color:var(--text);text-align:center;padding:22px;background:var(--pre-bg);border:1px solid var(--line);border-radius:14px;word-break:break-all;}
.id-info{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;}
.id-info span{font-size:13px;color:var(--text-2);background:var(--border-soft);border:1px solid var(--line);padding:6px 12px;border-radius:999px;}
.radio-row{display:flex;gap:18px;}
.radio-row label{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);cursor:pointer;}
.radio-row input{accent-color:var(--accent);width:16px;height:16px;}

/* ===== 图片转 Base64 ===== */
.tool-sub-title{font-size:16px;font-weight:700;color:var(--text);padding-top:6px;}
.tool-divider{height:1px;background:var(--line);}
.drop-zone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:36px 20px;border:1px dashed var(--line);border-radius:14px;background:var(--field-bg);cursor:pointer;transition:border-color .2s,background .2s;text-align:center;}
.drop-zone p{font-size:14px;color:var(--text-3);}
.drop-zone.over{border-color:var(--accent);background:var(--g-accent);}
.img-preview{display:flex;flex-direction:column;gap:10px;}
.img-preview img{max-width:100%;max-height:280px;border-radius:12px;border:1px solid var(--line);background:repeating-conic-gradient(var(--card) 0% 25%,var(--field-bg) 0% 50%) 50%/16px 16px;}
.img-meta{font-size:12.5px;color:var(--text-3);}

/* ===== URL 编码解码 ===== */
.mode-hint{font-size:12.5px;color:var(--text-3);min-height:18px;line-height:1.7;}

/* ===== Footer ===== */
.footer{background:var(--footer);border-top:1px solid var(--line);}
.footer-inner{width:1200px;max-width:calc(100% - 64px);margin:0 auto;padding:72px 0 40px;display:flex;flex-direction:column;gap:40px;}
.footer-top{display:flex;justify-content:space-between;gap:48px;flex-wrap:wrap;}
.footer-brand{width:400px;max-width:100%;display:flex;flex-direction:column;gap:16px;}
.footer-brand .logo{font-size:19px;}
.footer-brand p{font-size:14px;color:var(--text-3);max-width:320px;}
.link-cols{display:flex;gap:72px;flex-wrap:wrap;}
.link-col{display:flex;flex-direction:column;gap:14px;}
.link-col b{font-size:15px;font-weight:700;color:var(--text);}
.link-col a{font-size:14px;color:var(--text-4);}
.link-col a:hover{color:var(--text-2);transition:color .2s;}
.footer-divider{height:1px;background:var(--line);}
.footer-bottom{display:flex;justify-content:center;font-size:13px;color:var(--text-4);}

/* ===== Responsive ===== */
@media(max-width:1024px){.nav-links{display:none;}}
@media(max-width:680px){
  .tool-title{font-size:30px;}
  .tools-grid{grid-template-columns:1fr;}
  .field-row{grid-template-columns:1fr;}
  .tool-panel{padding:22px 18px;}
  .id-out{font-size:18px;}
}