/* tools-calcs shared — competitor-inspired white cards + accent bars */
:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --link: #2563eb;
  --accent-dca: #f5b800;
  --accent-pos: #3b82f6;
  --accent-liq: #f43f5e;
  --green: #059669;
  --red: #dc2626;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);
  --font: "PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{font-size:16px}
body{
  margin:0;font-family:var(--font);background:var(--bg);color:var(--text);
  line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:24px 16px 48px}
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-bottom:28px;flex-wrap:wrap;
}
.topbar .brand{font-weight:700;font-size:1.05rem;color:var(--text)}
.topbar nav{display:flex;gap:14px;flex-wrap:wrap;font-size:.9rem}
.topbar nav a{color:var(--muted)}
.topbar nav a.active,.topbar nav a:hover{color:var(--link)}

.hero h1{margin:0 0 8px;font-size:1.75rem;font-weight:800;letter-spacing:-.02em}
.hero p{margin:0;color:var(--muted);font-size:.95rem;max-width:720px}

/* portal cards */
.tool-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:28px;width:100%;
}
@media(max-width:820px){.tool-grid{grid-template-columns:1fr}}
.tool-card,a.tool-card{
  background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
  overflow:hidden;display:flex;flex-direction:column;border:1px solid var(--border);
  transition:transform .15s ease,box-shadow .15s ease;
  text-decoration:none;color:inherit;min-width:0;
}
a.tool-card:hover{text-decoration:none;color:inherit}
.tool-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.08)}
.tool-card .accent{height:5px;width:100%}
.tool-card.dca .accent{background:var(--accent-dca)}
.tool-card.pos .accent{background:var(--accent-pos)}
.tool-card.liq .accent{background:var(--accent-liq)}
.tool-card .body{padding:20px 22px 22px;flex:1;display:flex;flex-direction:column}
.tool-card .icon{font-size:1.6rem;margin-bottom:10px;line-height:1}
.tool-card h2{margin:0 0 8px;font-size:1.15rem;font-weight:700}
.tool-card.dca h2{color:#1d4ed8}
.tool-card p{margin:0 0 16px;color:var(--muted);font-size:.9rem;flex:1}
.tool-card .cta{font-size:.9rem;font-weight:600;color:var(--link)}

/* calculator layout */
.calc-layout{
  display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px;align-items:start;
}
@media(max-width:860px){.calc-layout{grid-template-columns:1fr}}
.panel{
  background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
  border:1px solid var(--border);overflow:hidden;
}
.panel .accent{height:5px}
.panel.dca .accent{background:var(--accent-dca)}
.panel.pos .accent{background:var(--accent-pos)}
.panel.liq .accent{background:var(--accent-liq)}
.panel .inner{padding:22px 24px 26px}
.panel h2{margin:0 0 16px;font-size:1.1rem}

.field{margin-bottom:14px}
.field label{
  display:block;font-size:.82rem;font-weight:600;color:var(--muted);margin-bottom:5px;
}
.field input,.field select{
  width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;
  font-size:.95rem;font-family:inherit;background:#fff;color:var(--text);
}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--link);box-shadow:0 0 0 3px rgba(37,99,235,.12);
}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hint{font-size:.78rem;color:var(--muted);margin-top:4px}

.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
button.primary{
  appearance:none;border:none;background:var(--link);color:#fff;
  padding:11px 20px;border-radius:8px;font-size:.95rem;font-weight:600;
  font-family:inherit;cursor:pointer;
}
button.primary:hover{background:#1d4ed8}
button.ghost{
  appearance:none;border:1px solid var(--border);background:#fff;color:var(--text);
  padding:11px 16px;border-radius:8px;font-size:.9rem;font-family:inherit;cursor:pointer;
}
button.ghost:hover{background:var(--bg)}

.metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.metric{
  background:var(--bg);border-radius:10px;padding:14px 16px;border:1px solid var(--border);
}
.metric .label{font-size:.75rem;color:var(--muted);margin-bottom:4px}
.metric .value{font-size:1.2rem;font-weight:700;font-variant-numeric:tabular-nums}
.metric .value.pos{color:var(--green)}
.metric .value.neg{color:var(--red)}
.note{
  margin-top:16px;padding:12px 14px;background:#fffbeb;border:1px solid #fde68a;
  border-radius:8px;font-size:.8rem;color:#92400e;line-height:1.5;
}
.warn{
  margin-top:12px;padding:12px 14px;background:#fef2f2;border:1px solid #fecaca;
  border-radius:8px;font-size:.8rem;color:#991b1b;
}

.table-wrap{overflow-x:auto;margin-top:16px}
table.curve{
  width:100%;border-collapse:collapse;font-size:.85rem;font-variant-numeric:tabular-nums;
}
table.curve th,table.curve td{
  padding:8px 10px;text-align:right;border-bottom:1px solid var(--border);
}
table.curve th{color:var(--muted);font-weight:600;font-size:.75rem;text-align:right}
table.curve th:first-child,table.curve td:first-child{text-align:left}
table.curve tr:hover td{background:#f9fafb}

.footer-note{
  margin-top:36px;padding-top:16px;border-top:1px solid var(--border);
  font-size:.78rem;color:var(--muted);text-align:center;
}
.seg{display:flex;gap:0;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.seg button{
  flex:1;appearance:none;border:none;background:#fff;padding:10px;font-family:inherit;
  font-size:.9rem;cursor:pointer;color:var(--muted);border-right:1px solid var(--border);
}
.seg button:last-child{border-right:none}
.seg button.on{background:var(--link);color:#fff;font-weight:600}
.badge{
  display:inline-block;font-size:.7rem;padding:2px 8px;border-radius:999px;
  background:#eff6ff;color:#1d4ed8;font-weight:600;margin-left:8px;vertical-align:middle;
}