/* ============================================================
   全站样式 · 设计 token 沿用原站主色 #2456e6
   ============================================================ */
:root{
  --primary:#2456e6; --primary-dark:#1c46c8; --primary-soft:#eef3ff;
  --bg:#f5f7fa; --card:#fff; --border:#e4e9f0; --text:#1a2333; --muted:#6b7a90;
  --accent:#0e9f6e; --warn:#b45309; --danger:#d64545;
  --shadow:0 1px 3px rgba(20,35,60,.06),0 8px 24px rgba(20,35,60,.08);
  --radius:10px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  background:var(--bg); color:var(--text); font-size:14px; line-height:1.65;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:1280px;margin:0 auto;padding:0 20px}

/* ---------------- 页头导航 ---------------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.hd{display:flex;align-items:center;gap:20px;height:62px}
.logo{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:600;color:var(--text);white-space:nowrap}
.logo:hover{text-decoration:none}
.logo i{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,#2456e6,#7aa5ff);
  color:#fff;display:grid;place-items:center;font-style:normal;font-size:14px;font-weight:600}
.logo small{display:block;font-size:11px;color:var(--muted);font-weight:400;line-height:1.2}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto;list-style:none}
.nav>li{position:relative}
.nav>li>a{display:block;padding:8px 12px;border-radius:8px;color:var(--text);font-size:14px}
.nav>li>a:hover,.nav>li.on>a{background:var(--primary-soft);color:var(--primary);text-decoration:none}
.dropdown{position:absolute;top:calc(100% + 6px);left:0;min-width:196px;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:0 12px 32px rgba(20,35,60,.14);padding:6px;
  opacity:0;visibility:hidden;transform:translateY(4px);transition:.16s}
.nav>li:hover .dropdown,.nav>li:focus-within .dropdown{opacity:1;visibility:visible;transform:none}
.dropdown a{display:block;padding:7px 10px;border-radius:7px;color:var(--muted);font-size:13px}
.dropdown a:hover{background:var(--primary-soft);color:var(--primary);text-decoration:none}
.nav-toggle{display:none;margin-left:auto;border:1px solid var(--border);background:#fff;border-radius:8px;
  padding:6px 10px;font-size:13px;cursor:pointer;color:var(--text);font-family:inherit}
@media(max-width:900px){
  .nav{display:none}
  .nav.open{display:flex;flex-direction:column;align-items:stretch;position:absolute;top:62px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--border);padding:10px 16px;gap:0;box-shadow:var(--shadow)}
  .nav.open>li>a{padding:10px 8px}
  .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;
    padding:0 0 8px 16px;min-width:0}
  .nav-toggle{display:block}
}

/* ---------------- 通用区块 ---------------- */
.crumb{padding:14px 0 0;font-size:12.5px;color:var(--muted)}
.crumb a{color:var(--muted)}
.crumb span{margin:0 6px;color:#b9c2d2}
.page-head{padding:16px 0 22px}
.page-head h1{font-size:26px;line-height:1.35;font-weight:600;letter-spacing:-.2px}
.page-head p{color:var(--muted);margin-top:8px;max-width:760px}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.tag{font-size:12px;color:var(--primary);background:var(--primary-soft);border-radius:999px;padding:3px 10px}

.section{padding:34px 0}
.section>h2{font-size:18px;font-weight:600;margin-bottom:6px}
.section>p.sub{color:var(--muted);margin-bottom:18px}

/* 卡片网格 */
.grid{display:grid;gap:14px}
.grid.col2{grid-template-columns:repeat(2,1fr)}
.grid.col3{grid-template-columns:repeat(3,1fr)}
.grid.col4{grid-template-columns:repeat(4,1fr)}
@media(max-width:980px){.grid.col4{grid-template-columns:repeat(2,1fr)}.grid.col3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid.col2,.grid.col3,.grid.col4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;
  transition:.16s;display:block;color:inherit}
.card:hover{border-color:#c3d0ec;box-shadow:var(--shadow);text-decoration:none;transform:translateY(-1px)}
.card .ico{width:36px;height:36px;border-radius:10px;background:var(--primary-soft);color:var(--primary);
  display:grid;place-items:center;font-size:16px;margin-bottom:10px}
.card h3{font-size:15px;font-weight:600;margin-bottom:4px}
.card p{font-size:12.5px;color:var(--muted);line-height:1.6}
.card .badge{display:inline-block;font-size:11px;border-radius:4px;padding:1px 6px;margin-left:6px;
  background:#eaf3de;color:#3b6d11;vertical-align:1px;font-weight:400}
.card .badge.soon{background:#f1efe8;color:#5f5e5a}

/* Hero */
.hero{padding:44px 0 30px;background:#fff;border-bottom:1px solid var(--border)}
.hero h1{font-size:30px;line-height:1.35;font-weight:600;letter-spacing:-.3px;max-width:760px}
.hero p{color:var(--muted);margin-top:12px;max-width:700px;font-size:14.5px}
.hero .tagline{font-size:16px;font-weight:500;color:var(--text);line-height:1.7;max-width:820px;margin-top:14px}
.hero .en{font-size:12.5px;color:var(--muted);letter-spacing:.2px;margin-top:8px;max-width:820px}
.hero .btns{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--border);
  background:#fff;border-radius:8px;padding:9px 16px;font-size:13.5px;cursor:pointer;color:var(--text);
  font-family:inherit;transition:.15s;white-space:nowrap}
.btn:hover{border-color:var(--primary);color:var(--primary);text-decoration:none}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-dark);color:#fff}
.btn.sm{padding:6px 12px;font-size:12.5px}
.btn:disabled{opacity:.6;cursor:not-allowed}

/* 正文排版（说明/FAQ/参考页） */
.prose{max-width:820px}
.prose h2{font-size:18px;font-weight:600;margin:26px 0 10px}
.prose h3{font-size:15px;font-weight:600;margin:18px 0 8px}
.prose p{margin:8px 0;color:#2b3648}
.prose ul,.prose ol{margin:8px 0 8px 20px;color:#2b3648}
.prose li{margin:4px 0}
.prose table{width:100%;border-collapse:collapse;font-size:13px;margin:12px 0;background:#fff}
.prose th,.prose td{border:1px solid var(--border);padding:8px 10px;text-align:left}
.prose th{background:#f8fafc;font-weight:500;color:var(--muted)}
.faq{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:4px 18px;margin-top:14px}
.faq details{border-bottom:1px solid var(--border);padding:12px 0}
.faq details:last-child{border-bottom:none}
.faq summary{cursor:pointer;font-size:14px;font-weight:500;list-style:none;position:relative;padding-right:20px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:2px;top:0;color:var(--muted);font-size:16px}
.faq details[open] summary::after{content:"–"}
.faq details p{font-size:13px;color:var(--muted);margin-top:8px}
.note{background:#fff8ec;border:1px solid #f5dfb8;color:var(--warn);border-radius:var(--radius);
  padding:12px 14px;font-size:12.5px;line-height:1.7;margin:16px 0}

/* 正文区右侧栏：宽屏下把 .prose 原本空掉的右半边用「本页目录 + 相关工具」填上 */
.prose-aside{display:none;font-size:12.5px}
.prose-aside .side-box{background:#fff;border:1px solid var(--border);border-radius:10px;
  padding:14px 16px;margin-bottom:12px}
.prose-aside h4{font-size:12px;color:var(--text);font-weight:600;margin-bottom:7px;
  letter-spacing:.3px}
.prose-aside a{display:block;padding:4px 0;color:var(--muted);font-size:12.5px;line-height:1.55}
.prose-aside a:hover{color:var(--primary);text-decoration:none}
.prose-aside .side-tip{background:var(--primary-soft);border:1px solid #d3e0ff;color:#3b4a6b;
  border-radius:10px;padding:12px 14px;font-size:12px;line-height:1.75}
@media(min-width:1000px){
  .section.prose.has-aside{display:grid;grid-template-columns:minmax(0,1fr) 258px;
    column-gap:36px;align-items:start;max-width:none}
  .section.prose.has-aside>*:not(.prose-aside){grid-column:1;min-width:0;max-width:900px}
  .section.prose.has-aside>.prose-aside{display:block;grid-column:2;grid-row:1 / span 999;
    position:sticky;top:78px;align-self:start}
}

/* 页脚 */
.site-footer{background:#fff;border-top:1px solid var(--border);margin-top:40px;padding:30px 0 24px;font-size:12.5px;color:var(--muted)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px}
@media(max-width:780px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot-grid h4{font-size:13px;color:var(--text);font-weight:600;margin-bottom:8px}
.foot-grid a{display:block;color:var(--muted);padding:3px 0}
.foot-bottom{border-top:1px solid var(--border);margin-top:22px;padding-top:16px;display:flex;
  justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12px}

/* ---------------- 工具页布局 ---------------- */
/* 工具区限宽居中：宽度 = .container 内容宽（1280 - 左右各 20 padding = 1240），
   保证工具区左右边界与面包屑、标题、正文、页脚严格对齐 */
.tool-wrap{display:grid;grid-template-columns:392px 1fr;
  max-width:1240px;margin:14px auto 0;
  border:1px solid var(--border);border-radius:12px;
  background:var(--card);box-shadow:var(--shadow)}
@media(max-width:1080px){.tool-wrap{grid-template-columns:340px 1fr}}
@media(max-width:860px){.tool-wrap{grid-template-columns:1fr;border-radius:10px;margin:10px 12px 0}}
.tool-panel{border-right:1px solid var(--border);background:var(--card);border-radius:11px 0 0 11px}
@media(max-width:860px){.tool-panel{border-right:none;border-bottom:1px solid var(--border);border-radius:10px 10px 0 0}}
.tool-panel-inner{padding:18px 18px 22px}
.tool-stage{background:#eef1f7;padding:20px;overflow:auto;min-height:400px;border-radius:0 11px 11px 0}
@media(max-width:860px){.tool-stage{padding:12px;overflow-x:auto;border-radius:0 0 10px 10px}}

/* 单证页：左右两栏等高，各自独立上下滑动。左表单长、右 A4 纸固定高，
   不再出现「一栏已经到底、另一栏还在跟着整页滚」的不对称感 */
@media(min-width:861px){
  .doc-tool-wrap{height:calc(100vh - 92px);min-height:620px;max-height:1000px}
  .doc-tool-wrap>.tool-panel,.doc-tool-wrap>.tool-stage{overflow-y:auto;min-height:0}
  .doc-tool-wrap>.tool-panel::-webkit-scrollbar,
  .doc-tool-wrap>.tool-stage::-webkit-scrollbar{width:10px;height:10px}
  .doc-tool-wrap>.tool-panel::-webkit-scrollbar-thumb,
  .doc-tool-wrap>.tool-stage::-webkit-scrollbar-thumb{background:#c2cde3;border-radius:8px;
    border:2px solid transparent;background-clip:padding-box}
  .doc-tool-wrap>.tool-panel::-webkit-scrollbar-thumb:hover,
  .doc-tool-wrap>.tool-stage::-webkit-scrollbar-thumb:hover{background:#9db0d6;background-clip:padding-box}
  /* 导出时临时放开高度与裁剪，保证整张 A4 被完整渲染 */
  .doc-tool-wrap.exporting{height:auto!important;max-height:none!important}
  .doc-tool-wrap.exporting>.tool-panel,.doc-tool-wrap.exporting>.tool-stage{overflow:visible!important}
}

.pf-block{margin-bottom:18px}
.pf-title{font-size:11.5px;letter-spacing:.6px;text-transform:uppercase;color:var(--primary-dark);
  font-weight:600;margin-bottom:9px;display:flex;align-items:center;gap:8px}
.pf-title::after{content:"";flex:1;height:1px;background:var(--border)}
.pf-row{display:flex;gap:9px}
.pf-row>*{flex:1;min-width:0}
.pf-field{margin-bottom:9px}
.pf-field label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
.pf-field input,.pf-field select,.pf-field textarea{width:100%;padding:7px 10px;border:1px solid var(--border);
  border-radius:8px;font-size:13px;font-family:inherit;background:#fbfcfe;color:var(--text);outline:none}
.pf-field textarea{resize:vertical;min-height:58px}
.pf-field input:focus,.pf-field select:focus,.pf-field textarea:focus{border-color:var(--primary);background:#fff}

.logo-box{border:1.5px dashed #c3cde4;border-radius:10px;padding:12px;display:flex;align-items:center;
  gap:12px;background:#fbfcfe}
.logo-thumb{width:54px;height:54px;border-radius:8px;border:1px solid var(--border);flex-shrink:0;
  background:#eef1f8 center/contain no-repeat;display:grid;place-items:center;font-size:11px;color:#aab3c8}
.logo-actions{display:flex;flex-direction:column;gap:5px;font-size:11.5px;color:var(--muted)}
.mini-btn{border:1px solid var(--border);background:#fff;border-radius:6px;padding:3px 9px;
  font-size:12px;cursor:pointer;color:var(--text);width:fit-content;font-family:inherit}
.mini-btn:hover{border-color:var(--primary);color:var(--primary)}

.item-card{position:relative;border:1px solid var(--border);border-radius:10px;padding:11px;margin-bottom:9px;background:#fbfcfe}
.item-del{position:absolute;top:7px;right:7px;width:22px;height:22px;border:none;background:#fff0f0;
  color:var(--danger);border-radius:6px;cursor:pointer;font-size:13px;line-height:1}
.item-del:hover{background:#ffe0e0}
.pf-add{width:100%;padding:8px;border:1.5px dashed #c3cde4;border-radius:10px;background:transparent;
  color:var(--primary);font-size:13px;cursor:pointer;font-family:inherit}
.pf-add:hover{background:var(--primary-soft);border-color:var(--primary)}
.pf-actions{display:flex;gap:9px;padding-top:6px}
.pf-actions .btn{flex:1}

/* ---------------- A4 纸张 ---------------- */
.paper{width:794px;min-height:1123px;background:#fff;box-shadow:0 10px 34px rgba(20,35,60,.13);
  padding:48px 52px;position:relative;overflow:hidden;margin:0 auto;font-size:13px}
.paper.exporting{box-shadow:none}
.paper .topbar{position:absolute;top:0;left:0;right:0;height:7px;
  background:linear-gradient(90deg,#2456e6,#7aa5ff,#bfd1ff)}
.p-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:30px}
.p-logo{max-height:66px;max-width:210px;object-fit:contain}
.p-logo-ph{width:180px;height:58px;border-radius:9px;background:var(--primary-soft);
  border:1.5px dashed #c3cde4;display:grid;place-items:center;color:#9aa6c0;font-size:12.5px}
.p-title-block{text-align:right}
.p-title{font-size:27px;font-weight:600;color:var(--primary-dark);letter-spacing:2px;line-height:1.2}
.p-sub{font-size:12.5px;color:var(--muted);letter-spacing:3px;margin-top:3px}
.p-meta{text-align:right;margin-top:10px;font-size:12px;line-height:1.75}
.p-meta b{color:var(--primary-dark);font-weight:500}
.p-parties{display:flex;gap:14px;margin-bottom:22px}
.party{flex:1;border-radius:11px;padding:14px 16px;background:#f8faff;border:1px solid var(--border)}
.party.seller{background:var(--primary-soft);border-color:#d3e0ff}
.party-tag{display:inline-block;font-size:10px;letter-spacing:1px;color:#fff;background:var(--primary);
  border-radius:4px;padding:2px 7px;margin-bottom:8px}
.party.buyer .party-tag{background:#3a4560}
.party-name{font-size:14px;font-weight:600;margin-bottom:5px;word-break:break-word}
.party-lines{font-size:11.5px;color:var(--muted);line-height:1.7;white-space:pre-line;word-break:break-word}
table.p-items{width:100%;border-collapse:collapse;font-size:12px}
.p-items thead th{background:var(--primary-dark);color:#fff;text-align:left;padding:8px 10px;
  font-weight:500;font-size:11.5px}
.p-items thead th:first-child{border-radius:7px 0 0 7px}
.p-items thead th:last-child{border-radius:0 7px 7px 0}
.p-items td{padding:8px 10px;border-bottom:1px solid var(--border);vertical-align:top;word-break:break-word}
.p-items tr:nth-child(even) td{background:#fafbfe}
.p-items .r{text-align:right;white-space:nowrap}
.c-strong{font-weight:500}
.c-sub{color:var(--muted);font-size:11px;white-space:pre-line;margin-top:2px}
.p-empty td{text-align:center;color:#b0b8cc;padding:20px}
.p-bottom{display:flex;gap:22px;margin-top:22px}
.p-notes{flex:1.25;min-width:0}
.p-totals{flex:1}
.notes-block{margin-bottom:14px}
.notes-block h4{font-size:10.5px;letter-spacing:1.2px;color:var(--primary-dark);text-transform:uppercase;
  margin-bottom:5px;border-bottom:2px solid var(--primary-soft);padding-bottom:4px;font-weight:600}
.notes-block .val{font-size:11.5px;line-height:1.7;white-space:pre-line;word-break:break-all}
.totals-table{width:100%;border-collapse:collapse;font-size:12.5px}
.totals-table td{padding:6px 12px}
.totals-table .lbl{color:var(--muted)}
.totals-table .amt{text-align:right;font-weight:500;white-space:nowrap}
.totals-table tr.grand td{background:var(--primary-dark);color:#fff;font-size:15px;font-weight:600}
.totals-table tr.grand td:first-child{border-radius:7px 0 0 7px}
.totals-table tr.grand td:last-child{border-radius:0 7px 7px 0}
.p-words{font-size:11px;color:var(--muted);margin-top:8px;line-height:1.6}
.p-sign{display:flex;justify-content:space-between;margin-top:40px}
.sign-box{width:230px;text-align:center}
.sign-line{border-top:1px solid #c3cde4;margin-top:52px;padding-top:7px;font-size:11.5px;color:var(--muted)}
.p-foot{margin-top:34px;padding-top:12px;border-top:1px solid var(--border);font-size:10px;
  color:#a0a8bc;text-align:center;letter-spacing:.3px}

/* 提示 */
#toast{position:fixed;left:50%;bottom:32px;transform:translate(-50%,12px);background:#1c2333;color:#fff;
  padding:10px 18px;border-radius:9px;font-size:13px;box-shadow:0 8px 24px rgba(0,0,0,.22);
  opacity:0;pointer-events:none;transition:.22s;z-index:9999;max-width:80vw;text-align:center}
#toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------------- 打印 ---------------- */
/* ---------------- 通用计算工具（录入在上、结果在下） ---------------- */
.tk-shell{max-width:1240px;margin:14px auto 0;background:#fff;border:1px solid var(--border);
  border-radius:12px;box-shadow:var(--shadow);overflow:hidden}
.tk-panel{padding:18px 20px 20px}
.tk-result{background:#eef1f7;border-top:1px solid var(--border);padding:18px 20px 22px}
.tk-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.tk-head h2{font-size:14px;font-weight:600;color:var(--text)}
.tk-sub{font-size:12px;color:var(--muted)}
.tk-row{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end;margin-bottom:10px}
.tk-field{display:flex;flex-direction:column;gap:4px;min-width:0;flex:1 1 130px}
.tk-field.grow2{flex:2 1 240px}
.tk-field label{font-size:11.5px;color:var(--muted)}
.tk-field input,.tk-field select{width:100%;border:1px solid var(--border);border-radius:8px;
  padding:7px 9px;font-size:13px;color:var(--text);background:#fff;outline:none}
.tk-field input:focus,.tk-field select:focus{border-color:var(--primary)}
.tk-sep{height:1px;background:var(--border);margin:14px 0}
.tk-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.tk-grid.cols4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:900px){.tk-grid.cols4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.tk-grid.cols4{grid-template-columns:1fr}}
.tk-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:14px 16px;
  box-shadow:var(--shadow);min-height:98px}
.tk-card .k{font-size:12px;color:var(--muted)}
.tk-card .v{font-size:23px;font-weight:600;color:var(--primary);line-height:1.25;margin-top:4px}
.tk-card .v small{font-size:12px;font-weight:400;color:var(--muted);margin-left:3px}
.tk-card .f{font-size:11.5px;color:var(--muted);margin-top:6px;line-height:1.5}
.tk-card.hot{border-color:var(--primary);background:#f6f9ff}
.tk-note{margin-top:14px;font-size:12px;color:var(--muted);line-height:1.8;background:#fff;
  border:1px dashed var(--border);border-radius:10px;padding:11px 14px}
.tk-table{width:100%;border-collapse:collapse;font-size:12.5px;background:#fff;margin-top:12px}
.tk-table th,.tk-table td{border:1px solid var(--border);padding:7px 10px;text-align:left}
.tk-table th{background:#f5f8ff;color:var(--muted);font-weight:500}
.tk-banner{background:#fff;border:1px solid var(--primary);border-left:4px solid var(--primary);
  border-radius:10px;padding:12px 16px;margin-bottom:14px;font-size:13px;line-height:1.7}
.tk-banner b{color:var(--primary)}
.tk-pal{display:flex;flex-wrap:wrap;gap:2px;background:#e8eefb;border:2px solid #b8c8e8;
  border-radius:6px;padding:6px;margin-top:12px;max-width:340px}
.tk-pal i{background:var(--primary);opacity:.72;border-radius:2px;display:block}
@media(max-width:900px){.tk-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.tk-grid{grid-template-columns:1fr}.tk-panel,.tk-result{padding:14px}}

@media print{
  .site-header,.site-footer,.tool-panel,.page-head,.crumb,.section,.no-print,.prose-aside{display:none!important}
  .tool-wrap{display:block;border:none;border-radius:0;box-shadow:none;max-width:none;margin:0}
  .doc-tool-wrap{height:auto!important;min-height:0!important;max-height:none!important}
  .tool-stage,.doc-tool-wrap>.tool-stage{padding:0;background:#fff;overflow:visible;border-radius:0}
  .paper{box-shadow:none;width:100%;min-height:auto;padding:14mm}
  @page{size:A4;margin:0}
}