:root {
  --qmp-green: #20a866;
  --qmp-green-dark: #087447;
  --qmp-ink: #132338;
  --qmp-muted: #607083;
  --qmp-line: #dfe8e3;
  --qmp-soft: #f4f8f6;
  --qmp-warm: #fff8e8;
  --qmp-white: #fff;
  --qmp-shadow: 0 18px 48px rgba(20, 62, 44, .10);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--qmp-ink);
  background: var(--qmp-white);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--qmp-green-dark);
  text-underline-offset: 3px;
}

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(19, 35, 56, .08);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(14px);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  text-decoration: none;
}

.brand img {
  display: block;
  width: 142px;
  max-height: 44px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 23px;
  font-size: 15px;
}

.site-nav a {
  color: #2c3b4e;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav .nav-cta {
  padding: 9px 17px;
  border-radius: 8px;
  color: #fff;
  background: var(--qmp-green);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 20px 78px;
  color: #fff;
  background:
    radial-gradient(circle at 85% 14%, rgba(76, 225, 151, .25), transparent 32%),
    radial-gradient(circle at 10% 85%, rgba(255, 202, 71, .13), transparent 31%),
    linear-gradient(135deg, #0c2d25 0%, #0e6140 52%, #0f8050 100%);
}

.hero::after {
  position: absolute;
  right: -90px;
  bottom: -170px;
  width: 420px;
  height: 420px;
  border: 1px solid rgba(255, 255, 255, .13);
  border-radius: 50%;
  content: "";
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(1120px, 100%);
  margin: 0 auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  margin: 0 0 18px;
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, .28);
  border-radius: 99px;
  color: #dff8eb;
  background: rgba(255, 255, 255, .08);
  font-size: 14px;
  letter-spacing: .05em;
}

.hero h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(38px, 6vw, 66px);
  line-height: 1.16;
  letter-spacing: -.025em;
}

.hero-lead {
  max-width: 820px;
  margin: 24px 0 0;
  color: #e8f7f0;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.85;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  margin-top: 28px;
  gap: 12px 24px;
  color: #ccebdc;
  font-size: 14px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  margin-top: 32px;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 20px;
  border: 1px solid rgba(255, 255, 255, .45);
  border-radius: 9px;
  color: #fff;
  text-decoration: none;
  font-weight: 650;
}

.button.primary {
  border-color: #fff;
  color: #0c6942;
  background: #fff;
}

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

.section {
  padding: 76px 0;
}

.section.soft {
  background: var(--qmp-soft);
}

.section-title {
  max-width: 800px;
  margin: 0 0 34px;
}

.section-title.center {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-title h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.25;
  letter-spacing: -.02em;
}

.section-title p {
  margin: 0;
  color: var(--qmp-muted);
  font-size: 17px;
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.fact-card,
.content-card,
.case-card,
.faq-item,
.source-card {
  border: 1px solid var(--qmp-line);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 7px 25px rgba(24, 73, 51, .045);
}

.fact-card {
  padding: 27px;
}

.fact-value {
  display: block;
  margin-bottom: 7px;
  color: var(--qmp-green-dark);
  font-size: clamp(31px, 4vw, 43px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.035em;
}

.fact-label {
  display: block;
  margin-bottom: 12px;
  font-size: 17px;
  font-weight: 700;
}

.fact-card p,
.content-card p,
.case-card p,
.faq-item p,
.source-card p {
  margin: 0;
  color: var(--qmp-muted);
}

.callout {
  margin-top: 18px;
  padding: 19px 22px;
  border-left: 4px solid #e9ad2c;
  border-radius: 8px;
  color: #594413;
  background: var(--qmp-warm);
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.content-card {
  padding: 30px;
}

.content-card h3,
.case-card h2,
.case-card h3,
.source-card h3 {
  margin: 0 0 13px;
  line-height: 1.35;
}

.clean-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.clean-list li {
  position: relative;
  margin-top: 10px;
  padding-left: 24px;
  color: #4c5d70;
}

.clean-list li::before {
  position: absolute;
  top: .68em;
  left: 2px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--qmp-green);
  content: "";
}

.definition-table {
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--qmp-line);
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 14px;
  background: #fff;
}

.definition-table th,
.definition-table td {
  padding: 17px 20px;
  border-bottom: 1px solid var(--qmp-line);
  text-align: left;
  vertical-align: top;
}

.definition-table th {
  width: 25%;
  color: #213449;
  background: #f7faf8;
}

.definition-table tr:last-child th,
.definition-table tr:last-child td {
  border-bottom: 0;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 24px 26px;
}

.faq-item h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.case-card {
  position: relative;
  overflow: hidden;
  padding: 30px;
}

.case-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--qmp-green), #64d397);
  content: "";
}

.case-index,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 3px 10px;
  border-radius: 99px;
  color: #087447;
  background: #e9f7f0;
  font-size: 13px;
  font-weight: 700;
}

.case-card h2 {
  margin-top: 14px;
  font-size: 24px;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 16px;
  gap: 7px;
}

.case-card dl {
  margin: 20px 0 0;
}

.case-card dt {
  margin-top: 14px;
  font-weight: 750;
}

.case-card dd {
  margin: 4px 0 0;
  color: var(--qmp-muted);
}

.case-sources {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--qmp-line);
  font-size: 14px;
}

.case-sources a {
  margin-right: 12px;
}

.source-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.source-card {
  padding: 24px;
}

.source-grade {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--qmp-green-dark);
  font-weight: 800;
}

.cta-band {
  padding: 46px 0;
  color: #fff;
  background: #102c24;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  gap: 30px;
}

.cta-inner h2 {
  margin: 0 0 7px;
  font-size: 29px;
}

.cta-inner p {
  margin: 0;
  color: #c9dfd5;
}

.site-footer {
  padding: 36px 20px;
  color: #aebbb6;
  background: #0b1d18;
  font-size: 14px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, 100%);
  margin: 0 auto;
  gap: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 20px;
}

.footer-links a {
  color: #d0ded8;
  text-decoration: none;
}

.small-note {
  color: var(--qmp-muted);
  font-size: 14px;
}

@media (max-width: 900px) {
  .nav-shell {
    min-height: 66px;
  }

  .site-nav a:not(.nav-cta) {
    display: none;
  }

  .fact-grid,
  .source-grid {
    grid-template-columns: 1fr;
  }

  .two-col,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 65px;
  }

  .cta-inner,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

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

@media (max-width: 620px) {
  .nav-shell,
  .page-shell,
  .cta-inner {
    width: min(100% - 28px, 1120px);
  }

  .brand img {
    width: 122px;
  }

  .site-nav .nav-cta {
    padding: 8px 12px;
    font-size: 14px;
  }

  .hero {
    padding-right: 14px;
    padding-left: 14px;
  }

  .section {
    padding: 58px 0;
  }

  .definition-table,
  .definition-table tbody,
  .definition-table tr,
  .definition-table th,
  .definition-table td {
    display: block;
    width: 100%;
  }

  .definition-table th {
    padding-bottom: 6px;
    border-bottom: 0;
  }

  .definition-table td {
    padding-top: 6px;
  }
}