:root {
  --ink: #172024;
  --muted: #607077;
  --line: #dfe7e6;
  --paper: #f7faf7;
  --card: #ffffff;
  --accent: #f2c94c;
  --accent-strong: #d9a600;
  --green: #168a5b;
  --green-soft: #e8f6ef;
  --blue-soft: #edf4f8;
  --danger-soft: #fff0ea;
  --shadow: 0 20px 60px rgba(23, 32, 36, 0.09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.72;
}

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

a:hover {
  color: var(--green);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(23, 32, 36, 0.1);
  background: rgba(247, 250, 247, 0.92);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 24px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 2px solid var(--ink);
  background: var(--accent);
  box-shadow: 4px 4px 0 var(--ink);
  font-size: 15px;
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a {
  padding: 6px 0;
}

.nav-links .button {
  padding: 8px 14px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  border-radius: 6px;
}

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 24px 32px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 40px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
}

.eyebrow::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--green);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.18;
  letter-spacing: 0;
}

h1 {
  max-width: 780px;
  font-size: clamp(38px, 5.4vw, 68px);
  font-weight: 900;
}

h2 {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 900;
}

h3 {
  font-size: 21px;
  font-weight: 850;
}

p {
  margin: 0;
}

.lead {
  max-width: 680px;
  margin-top: 22px;
  color: #39484d;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 7px;
  font-weight: 850;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.primary-button {
  border: 2px solid var(--ink);
  background: var(--accent);
  box-shadow: 5px 5px 0 var(--ink);
}

.secondary-button {
  border: 1px solid var(--line);
  background: #fff;
}

.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-2px);
}

.search-card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  box-shadow: var(--shadow);
}

.search-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 16px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  font-weight: 800;
}

.search-dot {
  width: 15px;
  height: 15px;
  border: 3px solid var(--ink);
  border-radius: 999px;
}

.result-item {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdfb;
}

.result-title {
  color: #244fd4;
  font-size: 18px;
  font-weight: 850;
}

.result-url {
  margin-top: 6px;
  color: var(--green);
  font-size: 13px;
}

.result-text {
  margin-top: 8px;
  color: #526066;
  font-size: 14px;
}

.result-badge {
  display: inline-flex;
  margin-top: 12px;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green);
  font-size: 12px;
  font-weight: 850;
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 54px 24px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
}

.section-header p {
  max-width: 560px;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 230px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
}

.card-tag {
  align-self: flex-start;
  margin-bottom: 14px;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--blue-soft);
  color: #335a68;
  font-size: 12px;
  font-weight: 850;
}

.card p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 15px;
}

.card-link {
  margin-top: auto;
  padding-top: 20px;
  color: var(--green);
  font-weight: 850;
}

.notice {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(260px, 0.35fr);
  gap: 24px;
  align-items: center;
  padding: 28px;
  border: 1px solid #f0cbb9;
  border-radius: 8px;
  background: var(--danger-soft);
}

.notice p {
  margin-top: 10px;
  color: #704a3d;
}

.check-list,
.article-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.check-list li,
.article-list li {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.tools-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.44fr);
  gap: 28px;
  align-items: end;
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 24px 18px;
}

.tools-hero h1 {
  font-size: clamp(42px, 6vw, 76px);
}

.ticker-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 18px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(242, 201, 76, 0.22), rgba(22, 138, 91, 0.12)),
    #fff;
  box-shadow: 5px 5px 0 var(--ink);
}

.ticker-strip span {
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid rgba(23, 32, 36, 0.14);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.82);
  font-family: Consolas, "Courier New", monospace;
  font-weight: 900;
}

.tools-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px 24px 42px;
}

.tool-panel {
  display: grid;
  gap: 20px;
  align-content: start;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 14px 44px rgba(23, 32, 36, 0.06);
}

.tool-panel-header {
  display: grid;
  gap: 8px;
}

.tool-panel-header p,
.tool-note {
  color: var(--muted);
  font-size: 14px;
}

.tool-kicker {
  color: var(--green);
  font-family: Consolas, "Courier New", monospace;
  font-size: 13px;
  font-weight: 900;
}

.calculator-grid,
.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.calculator-grid label {
  display: grid;
  gap: 6px;
  color: #3d4b50;
  font-size: 13px;
  font-weight: 850;
}

.calculator-grid input,
.calculator-grid select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid #cbd7d5;
  border-radius: 7px;
  background: #fbfdfb;
  color: var(--ink);
  font: inherit;
}

.calculator-grid input:focus,
.calculator-grid select:focus {
  outline: 3px solid rgba(242, 201, 76, 0.42);
  border-color: var(--ink);
}

.result-grid output {
  min-height: 94px;
  padding: 14px;
  border: 1px solid rgba(22, 138, 91, 0.18);
  border-radius: 8px;
  background: var(--green-soft);
}

.result-grid span {
  display: block;
  color: #426057;
  font-size: 12px;
  font-weight: 850;
}

.result-grid strong {
  display: block;
  margin-top: 8px;
  overflow-wrap: anywhere;
  font-family: Consolas, "Courier New", monospace;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.1;
}

.tool-note {
  padding: 12px 14px;
  border-left: 4px solid var(--accent);
  background: #fff9df;
}

.calculator-page-hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 58px 24px 16px;
}

.calculator-page-hero h1 {
  font-size: clamp(38px, 5.6vw, 72px);
}

.single-tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  align-items: start;
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 24px 54px;
}

.single-tool-card {
  border: 2px solid rgba(23, 32, 36, 0.14);
  box-shadow: 6px 6px 0 rgba(23, 32, 36, 0.12);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 34px;
  align-items: start;
}

.article {
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.article h1 {
  font-size: clamp(34px, 4.6vw, 54px);
}

.article h2 {
  margin-top: 38px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
  font-size: 28px;
}

.article h3 {
  margin-top: 24px;
}

.article p,
.article li {
  color: #405056;
}

.article p {
  margin-top: 14px;
}

.article ul,
.article ol {
  padding-left: 22px;
}

.article li + li {
  margin-top: 8px;
}

.aside {
  position: sticky;
  top: 86px;
  display: grid;
  gap: 14px;
}

.aside-box {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.aside-box p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.disclosure {
  border-left: 5px solid var(--accent);
  background: #fff9df;
}

.footer {
  margin-top: 48px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 30px 24px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 880px) {
  .hero-grid,
  .tools-hero,
  .tools-layout,
  .single-tool-layout,
  .article-layout,
  .notice {
    grid-template-columns: 1fr;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .section-header {
    display: block;
  }

  .section-header p {
    margin-top: 10px;
  }

  .aside {
    position: static;
  }
}

@media (max-width: 640px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    gap: 10px;
  }

  .hero {
    padding-top: 42px;
  }

  .article {
    padding: 24px;
  }

  .footer-inner {
    flex-direction: column;
  }

  .calculator-grid,
  .result-grid,
  .ticker-strip {
    grid-template-columns: 1fr;
  }
}