:root {
  --bg: #f4f1ea;
  --paper: #fffdf8;
  --paper-muted: #fbf7ef;
  --ink: #22272a;
  --ink-soft: #59636a;
  --ink-faint: #768087;
  --line: #ddd4c5;
  --line-strong: #c8b89f;
  --blue: #24566f;
  --blue-dark: #16394b;
  --green: #287463;
  --gold: #b7791f;
  --red: #9d2f2f;
  --shadow: 0 22px 60px rgba(29, 35, 37, 0.11);
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.72;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

h1,
h2,
h3,
p,
ol,
ul,
blockquote {
  margin-top: 0;
  letter-spacing: 0;
}

main {
  overflow: hidden;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  color: #ffffff;
  background:
    linear-gradient(115deg, rgba(16, 45, 59, 0.96), rgba(36, 86, 111, 0.9)),
    radial-gradient(circle at 80% 12%, rgba(183, 121, 31, 0.35), transparent 32%);
}

.topbar {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  font-weight: 900;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-size: 14px;
  font-weight: 750;
}

.hero-grid {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  min-height: 640px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 430px);
  gap: 48px;
  align-items: center;
  padding: 58px 0 78px;
}

.hero-copy {
  max-width: 780px;
}

.eyebrow,
.kicker {
  color: var(--gold);
  font-size: 14px;
  line-height: 1.3;
  font-weight: 900;
}

.hero .eyebrow {
  color: #f4c674;
  margin-bottom: 18px;
}

.hero h1 {
  max-width: 850px;
  margin-bottom: 22px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.04;
}

.lead {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 20px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 34px;
}

.primary-action,
.secondary-action {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  padding: 0 18px;
  text-decoration: none;
  font-weight: 900;
}

.primary-action {
  background: #ffffff;
  color: var(--blue-dark);
}

.secondary-action {
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.32);
}

.summary-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 18px 60px rgba(8, 24, 30, 0.26);
  backdrop-filter: blur(14px);
}

.summary-card h2 {
  margin-bottom: 12px;
  font-size: 26px;
}

.summary-card p,
.summary-card li {
  color: rgba(255, 255, 255, 0.86);
}

.summary-card ol {
  padding-left: 22px;
  margin-bottom: 18px;
}

.summary-note {
  margin-bottom: 0;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  font-weight: 800;
}

.content-band {
  background: var(--paper-muted);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro-layout {
  display: grid;
  grid-template-columns: 0.86fr 1fr;
  gap: 18px;
  padding: 34px 0;
}

.notice,
.distinction-card,
.step-card,
.plain-panel,
.qa-grid article,
.check-table,
.warning {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.notice {
  padding: 22px;
  border-left: 5px solid var(--green);
}

.notice span {
  display: block;
  color: var(--green);
  font-weight: 900;
  margin-bottom: 8px;
}

.notice p,
.distinction-card p,
.plain-panel p,
.qa-grid p,
.warning p {
  color: var(--ink-soft);
}

.distinction-card {
  padding: 24px;
}

.distinction-card h2,
.plain-panel h2,
.warning h2 {
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 28px;
  line-height: 1.16;
}

.section {
  padding: 72px 0;
}

.section-header {
  max-width: 770px;
  margin-bottom: 28px;
}

.section-header h2 {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.12;
}

.section-header p:last-child {
  color: var(--ink-soft);
  font-size: 17px;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.step-card {
  padding: 28px;
}

.step-number {
  width: fit-content;
  margin-bottom: 18px;
  padding: 5px 10px;
  border-radius: 6px;
  background: rgba(36, 86, 111, 0.1);
  color: var(--blue);
  font-weight: 900;
}

.step-card h3 {
  margin-bottom: 12px;
  font-size: 26px;
  line-height: 1.2;
}

.step-card p {
  color: var(--ink-soft);
}

.takeaway {
  margin-top: 18px;
  padding: 15px;
  border-radius: 6px;
  background: rgba(40, 116, 99, 0.1);
  color: #205c4f;
  font-weight: 800;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

th,
td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th:last-child,
td:last-child {
  border-right: 0;
}

thead th {
  background: #ece3d3;
  color: var(--ink);
  font-weight: 900;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody td:first-child {
  color: var(--ink);
  font-weight: 900;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
  gap: 18px;
}

.plain-panel {
  padding: 28px;
}

.accent-panel {
  background: #f7efe0;
  border-color: var(--line-strong);
}

blockquote {
  margin-bottom: 0;
  padding-left: 18px;
  border-left: 5px solid var(--gold);
  color: var(--blue-dark);
  font-size: 22px;
  font-weight: 900;
  line-height: 1.55;
}

.qa-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.qa-grid article {
  padding: 22px;
}

.qa-grid h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.25;
}

.check-table {
  margin-top: 22px;
  padding: 24px;
}

.check-table h3 {
  margin-bottom: 16px;
  font-size: 24px;
}

.check-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.check-list div {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper-muted);
}

.check-list strong,
.check-list span {
  display: block;
}

.check-list strong {
  color: var(--ink);
}

.check-list span {
  margin-top: 4px;
  color: var(--ink-soft);
  font-size: 14px;
}

.warning {
  display: grid;
  grid-template-columns: minmax(220px, 0.35fr) 1fr;
  gap: 24px;
  padding: 28px;
  border-color: rgba(157, 47, 47, 0.35);
}

.warning .kicker {
  color: var(--red);
}

.warning p {
  margin-bottom: 0;
}

.footer {
  padding: 54px 0;
  background: #18252b;
  color: #ffffff;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) 1fr;
  gap: 32px;
}

.footer h2 {
  margin-bottom: 10px;
}

.footer p {
  color: rgba(255, 255, 255, 0.72);
}

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

.footer a {
  color: #f4c674;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

@media (max-width: 900px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero-grid,
  .intro-layout,
  .step-grid,
  .split,
  .qa-grid,
  .check-list,
  .warning,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    min-height: auto;
    padding: 40px 0 54px;
  }

  .summary-card,
  .step-card,
  .plain-panel {
    padding: 22px;
  }

  .section {
    padding: 54px 0;
  }
}

@media (max-width: 560px) {
  .container,
  .topbar,
  .hero-grid {
    width: min(100% - 28px, 1120px);
  }

  .nav-links a {
    flex: 1 1 calc(50% - 8px);
    justify-content: center;
  }

  .hero h1 {
    font-size: 38px;
  }

  .lead {
    font-size: 17px;
  }

  .hero-actions a {
    width: 100%;
  }

  .distinction-card h2,
  .plain-panel h2,
  .warning h2 {
    font-size: 24px;
  }

  blockquote {
    font-size: 19px;
  }
}