:root {
  --navy: #102c52;
  --ink: #162f50;
  --muted: #60738b;
  --line: #dce4ee;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  color: var(--ink);
  background: #f5f7fa;
  color-scheme: light;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 280px; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }
.topbar { background: #fff; border-top: 5px solid var(--navy); border-bottom: 1px solid var(--line); }
.header-inner { max-width: 1240px; margin: 0 auto; padding: 22px 40px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 24px; min-width: 0; }
.company-logo { width: 88px; height: 74px; object-fit: contain; flex-shrink: 0; }
.brand span { border-left: 1px solid var(--line); padding-left: 24px; font-size: 25px; font-weight: 700; letter-spacing: 1px; }
time { color: var(--muted); font-size: 13px; white-space: nowrap; }
.shell { max-width: 1240px; margin: 0 auto; padding: 62px 40px 72px; }
.page-heading { display: flex; align-items: center; gap: 14px; margin-bottom: 30px; }
.heading-line { width: 4px; height: 26px; border-radius: 2px; background: var(--navy); }
h1 { margin: 0; font-size: 28px; font-weight: 650; letter-spacing: 1px; }
.tool-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.tool-card { display: flex; flex-direction: column; min-width: 0; padding: 32px 28px 24px; background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--navy); border-radius: 8px; transition: border-color .18s, box-shadow .18s, transform .18s; }
.tool-card:hover { border-color: var(--navy); box-shadow: 0 12px 28px #102c5210; transform: translateY(-3px); }
.tool-icon { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 10px; background: var(--navy); color: #fff; }
.tool-icon svg { width: 29px; height: 29px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.tool-card h2 { margin: 28px 0 12px; font-size: 21px; font-weight: 700; line-height: 1.5; }
.tool-card p { margin: 0 0 36px; color: var(--muted); font-size: 13px; line-height: 1.9; }
.card-bottom { margin-top: auto; border-top: 1px solid var(--line); padding-top: 20px; display: flex; align-items: center; justify-content: space-between; color: var(--navy); font-size: 14px; font-weight: 650; }
.card-bottom > span:last-child { font-size: 21px; }
.tool-card[aria-disabled="true"] { opacity: .55; cursor: not-allowed; }
.notice { padding: 16px; margin-top: 22px; border: 1px solid var(--line); background: #fff; color: #9d342c; font-size: 14px; }
:focus-visible { outline: 3px solid #497fbd; outline-offset: 5px; }
.skip-link { position: fixed; top: 12px; left: 12px; padding: 12px; background: #fff; border: 1px solid var(--navy); transform: translateY(-160%); z-index: 10; }
.skip-link:focus { transform: translateY(0); }
@media (max-width: 980px) {
  .header-inner { padding: 18px 28px; }
  .brand { gap: 16px; }
  .brand span { font-size: 22px; padding-left: 16px; }
  .shell { padding: 40px 28px 56px; }
  .tool-grid { gap: 16px; }
  .tool-card { padding: 26px 20px 20px; }
  .tool-card h2 { font-size: 18px; }
}
@media (max-width: 720px) {
  .header-inner { padding: 16px 20px; }
  .company-logo { width: 62px; height: 54px; }
  .brand { gap: 12px; }
  .brand span { padding-left: 12px; font-size: 19px; letter-spacing: 0; }
  time { display: none; }
  .shell { padding: 30px 20px 40px; }
  h1 { font-size: 24px; }
  .page-heading { margin-bottom: 22px; }
  .tool-grid { grid-template-columns: 1fr; }
  .tool-card { padding: 24px; }
  .tool-card h2 { margin-top: 20px; font-size: 21px; }
  .tool-card p { margin-bottom: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .tool-card { transition: none; }
  .tool-card:hover { transform: none; }
}