:root {
  --ink: #1d2733;
  --muted: #667085;
  --line: #d7dee8;
  --paper: #ffffff;
  --bg: #f4f6f8;
  --green: #176b55;
  --blue: #285e8f;
  --amber: #a45f16;
  --soft: #eef5f2;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 max(20px, calc((100vw - 1120px) / 2));
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: #fff;
  background: var(--green);
  border-radius: 8px;
}

.nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.workspace,
.tool-section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px 20px 0;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 24px;
  align-items: stretch;
}

.intro,
.summary-panel,
.tool-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.intro {
  padding: 34px;
  min-height: 270px;
}

.summary-panel {
  padding: 24px;
  background: var(--soft);
}

.summary-panel strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.summary-panel p,
.plain-list,
.lead,
.form-note,
.notice,
.doc-page p {
  color: var(--muted);
}

.plain-list {
  display: grid;
  gap: 8px;
  margin: 16px 0 0;
  padding-left: 20px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1.18;
  letter-spacing: 0;
}

h1 {
  max-width: 760px;
  font-size: 38px;
}

h2 {
  font-size: 26px;
}

.lead {
  max-width: 760px;
  margin: 18px 0 0;
  font-size: 17px;
}

.section-head {
  margin-bottom: 14px;
}

.tool-panel {
  padding: 24px;
}

label {
  display: block;
  color: var(--ink);
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  margin-top: 8px;
  padding: 13px 14px;
  color: var(--ink);
  background: #fbfcfe;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(23, 107, 85, 0.18);
  border-color: var(--green);
}

.form-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}

button {
  min-height: 42px;
  padding: 0 16px;
  color: #fff;
  background: var(--green);
  border: 1px solid var(--green);
  border-radius: 8px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

button.ghost {
  color: var(--ink);
  background: #fff;
  border-color: var(--line);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.result-grid div {
  min-height: 78px;
  padding: 14px;
  background: #f8fbfa;
  border: 1px solid #d9e7e2;
  border-radius: 8px;
}

.result-grid span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.result-grid strong {
  display: block;
  margin-top: 4px;
  color: var(--green);
  font-size: 24px;
}

.record-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.record-list li {
  display: grid;
  gap: 4px;
  padding: 14px;
  background: #f9fbfe;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.record-list a {
  color: var(--blue);
  overflow-wrap: anywhere;
}

.record-list small {
  color: var(--muted);
}

.notice {
  margin: 16px 0 0;
  padding: 16px;
  background: #fff8ed;
  border: 1px solid #efd9bb;
  border-radius: 8px;
}

.form-note {
  margin: 10px 0 0;
  font-size: 13px;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  padding: 32px 20px 42px;
  color: var(--muted);
  font-size: 13px;
}

.doc-page {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 72px;
}

.doc-page h1 {
  margin-bottom: 24px;
}

.doc-page h2 {
  margin: 28px 0 10px;
  font-size: 22px;
}

.doc-page p {
  margin: 0 0 14px;
}

@media (max-width: 860px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 14px 18px;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
    gap: 18px;
    padding-bottom: 2px;
  }

  .workspace,
  .form-grid,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .intro,
  .tool-panel,
  .summary-panel {
    padding: 22px;
  }

  h1 {
    font-size: 30px;
  }

  h2 {
    font-size: 23px;
  }
}