/* ===== 财算工具箱 全局样式 ===== */
:root{
  --ink:#16181d; --ink-2:#3b4048; --muted:#7a818d;
  --brand:#1d4ed8; --brand-dark:#1e40af; --brand-soft:#eff4ff;
  --gold:#b8860b;
  --line:#e6e9ef; --bg:#f6f7fa; --card:#ffffff;
  --ok:#0f9d58; --danger:#d93025;
  --radius:14px; --shadow:0 2px 12px rgba(22,24,29,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink); background:var(--bg); line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:1080px;margin:0 auto;padding:0 18px}

/* ===== 顶部导航 ===== */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{display:flex;align-items:center;gap:9px;font-size:19px;font-weight:800;color:var(--ink)}
.logo:hover{text-decoration:none}
.logo-badge{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--brand),#4f7cff);
  color:#fff;display:grid;place-items:center;font-size:17px}
.logo small{font-size:11px;color:var(--muted);font-weight:500;display:block;line-height:1.2}
.nav-links{display:flex;gap:22px;font-size:14.5px}
.nav-links a{color:var(--ink-2)}
.nav-links a:hover{color:var(--brand);text-decoration:none}
@media(max-width:720px){.nav-links a:nth-child(n+3){display:none}}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,#10204f 0%,#1d4ed8 100%);color:#fff;padding:54px 0 48px}
.hero h1{font-size:32px;line-height:1.3;margin-bottom:12px}
.hero p{font-size:16px;opacity:.92;max-width:640px}
.hero .badges{margin-top:18px;display:flex;gap:10px;flex-wrap:wrap}
.hero .badges span{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
  padding:5px 13px;border-radius:999px;font-size:13px}

/* ===== 广告位 ===== */
.ad-slot{margin:26px auto;display:flex;align-items:center;justify-content:center;
  border:1px dashed #c9d1de;background:repeating-linear-gradient(45deg,#fbfcfe,#fbfcfe 10px,#f4f6fa 10px,#f4f6fa 20px);
  border-radius:10px;color:#9aa3b1;font-size:13px;min-height:90px;max-width:100%;overflow:hidden}
.ad-slot .ad-label{position:relative}
.ad-slot .ad-label::before{content:"广告 · ";letter-spacing:1px}
.ad-slot[data-size="leaderboard"]{height:90px}
.ad-slot[data-size="rect"]{width:300px;height:250px;max-width:100%}
.ad-slot[data-size="mobile"]{display:none}
.ad-slot ins{display:block}
@media(max-width:720px){
  .ad-slot[data-size="leaderboard"]{display:none}
  .ad-slot[data-size="mobile"]{display:flex;height:100px}
}

/* ===== 卡片网格 ===== */
.section{padding:40px 0}
.section h2{font-size:23px;margin-bottom:6px}
.section .sub{color:var(--muted);font-size:14.5px;margin-bottom:24px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.grid{grid-template-columns:1fr}}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;display:block;color:var(--ink)}
.tool-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(29,78,216,.12);text-decoration:none}
.tool-card .ico{width:42px;height:42px;border-radius:11px;background:var(--brand-soft);color:var(--brand);
  display:grid;place-items:center;font-size:21px;margin-bottom:13px;font-weight:700}
.tool-card h3{font-size:17px;margin-bottom:6px}
.tool-card p{font-size:13.5px;color:var(--muted);line-height:1.6}
.tool-card .go{margin-top:12px;font-size:13.5px;color:var(--brand);font-weight:600}

/* 内容条 */
.richtext{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;margin-top:26px}
.richtext h2{font-size:19px;margin:18px 0 8px}
.richtext h2:first-child{margin-top:0}
.richtext p,.richtext li{color:var(--ink-2);font-size:15px}
.richtext ul{padding-left:22px;margin:8px 0}

/* ===== 工具页布局 ===== */
.crumb{font-size:13px;color:var(--muted);padding:16px 0 0}
.tool-head{padding:18px 0 6px}
.tool-head h1{font-size:26px}
.tool-head p{color:var(--muted);font-size:14.5px;margin-top:4px}
.tool-layout{display:grid;grid-template-columns:1fr 306px;gap:22px;margin:20px 0 10px;align-items:start}
@media(max-width:900px){.tool-layout{grid-template-columns:1fr}}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.side .ad-slot{margin:0 0 18px;width:300px}
@media(max-width:900px){.side{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}.side .ad-slot{margin:0}}

/* 表单 */
.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:14px;font-weight:600;margin-bottom:6px;color:var(--ink-2)}
.form-row .hint{font-weight:400;color:var(--muted);font-size:12.5px}
input[type=number],select{width:100%;padding:10px 12px;border:1px solid #d3d8e0;border-radius:9px;
  font-size:15px;font-family:inherit;background:#fff;color:var(--ink)}
input[type=number]:focus,select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,78,216,.12)}
.input-suffix{position:relative}
.input-suffix input{padding-right:46px}
.input-suffix .unit{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:13.5px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:480px){.two-col{grid-template-columns:1fr}}
.btn{display:inline-block;width:100%;padding:12px;border:none;border-radius:10px;
  background:var(--brand);color:#fff;font-size:16px;font-weight:700;cursor:pointer;font-family:inherit}
.btn:hover{background:var(--brand-dark)}
.btn.secondary{background:#eef1f6;color:var(--ink-2);margin-top:10px}
.btn.secondary:hover{background:#e2e7ef}
.radio-row{display:flex;gap:10px}
.radio-row label{flex:1;border:1px solid #d3d8e0;border-radius:9px;padding:9px;text-align:center;
  font-size:14px;cursor:pointer;margin:0;font-weight:500}
.radio-row input{display:none}
.radio-row input:checked + span{color:var(--brand);font-weight:700}
.radio-row label:has(input:checked){border-color:var(--brand);background:var(--brand-soft)}

/* 结果 */
.result-box{margin-top:20px;border-top:1px dashed var(--line);padding-top:18px;display:none}
.result-box.show{display:block}
.result-main{background:linear-gradient(135deg,#f0f5ff,#e8f0fe);border-radius:12px;padding:18px 20px;margin-bottom:14px}
.result-main .k{font-size:13.5px;color:var(--muted)}
.result-main .v{font-size:30px;font-weight:800;color:var(--brand-dark);line-height:1.3}
.result-main .v small{font-size:14px;font-weight:500;color:var(--muted)}
.kv-list{display:grid;grid-template-columns:1fr 1fr;gap:8px 18px}
.kv-list .kv{display:flex;justify-content:space-between;border-bottom:1px dashed var(--line);padding:7px 0;font-size:14.5px}
.kv .k{color:var(--muted)}
.kv .v{font-weight:700;font-variant-numeric:tabular-nums}
.note{margin-top:14px;font-size:12.5px;color:var(--muted);background:#fafbfc;border:1px solid var(--line);
  border-radius:8px;padding:9px 12px}

/* 明细表 */
.table-wrap{margin-top:16px;max-height:360px;overflow:auto;border:1px solid var(--line);border-radius:9px}
table.schedule{width:100%;border-collapse:collapse;font-size:13.5px;font-variant-numeric:tabular-nums}
table.schedule th{position:sticky;top:0;background:#f2f5fa;padding:9px 10px;text-align:right;font-weight:600;color:var(--ink-2)}
table.schedule th:first-child,table.schedule td:first-child{text-align:center}
table.schedule td{padding:8px 10px;text-align:right;border-top:1px solid #eef0f4;color:var(--ink-2)}
table.schedule tr:hover td{background:#f8faff}

/* 相关工具 */
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}
@media(max-width:560px){.related{grid-template-columns:1fr}}
.related a{background:#f7f9fc;border:1px solid var(--line);border-radius:10px;padding:12px 14px;
  font-size:14px;color:var(--ink-2)}
.related a:hover{border-color:var(--brand);text-decoration:none;color:var(--brand)}

/* FAQ */
.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:0 16px;margin-top:10px}
.faq summary{padding:13px 0;cursor:pointer;font-weight:600;font-size:15px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--muted);font-size:18px}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 0 13px;font-size:14px;color:var(--ink-2)}

/* ===== 页脚 ===== */
.site-footer{background:#14171d;color:#9aa3b1;margin-top:50px;padding:34px 0 26px;font-size:13.5px}
.footer-grid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px}
.site-footer a{color:#c4cbd6}
.site-footer .fcol b{color:#eef1f6;display:block;margin-bottom:8px;font-size:14px}
.site-footer .fcol a{display:block;padding:3px 0}
.site-footer .copy{border-top:1px solid #262b34;margin-top:22px;padding-top:16px;font-size:12.5px;color:#6b7280}