:root {
  --ink: #163126;
  --muted: #64736b;
  --green: #245642;
  --green-2: #6da77a;
  --pale: #edf6e8;
  --cream: #fbf4e7;
  --line: #dfe8dc;
  --white: #fffefa;
  --shadow: 0 24px 70px rgba(31, 62, 45, .14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(174, 211, 158, .28), transparent 32rem),
    linear-gradient(180deg, #fbfff8 0%, #fffefa 38%, #f6faf2 100%);
  line-height: 1.65;
}

img {
  display: block;
  max-width: 100%;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 254, 250, .86);
  border-bottom: 1px solid rgba(220, 232, 217, .85);
  backdrop-filter: blur(18px);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0;
}

.brand img {
  border-radius: 12px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #385348;
  font-size: 15px;
}

.nav-menu a {
  padding: 9px 14px;
  border-radius: 999px;
}

.nav-menu a:hover {
  background: var(--pale);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 14px;
  font: inherit;
}

.hero {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 56px 0 44px;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, .98fr);
  gap: 44px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(44px, 7vw, 78px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.35;
  letter-spacing: 0;
}

.definition {
  max-width: 720px;
  margin-bottom: 22px;
  color: #334b40;
  font-size: 18px;
}

.lead-summary {
  display: grid;
  gap: 12px;
  margin: 0 0 24px;
  padding: 20px;
  background: rgba(255, 255, 255, .72);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 16px 40px rgba(35, 73, 51, .08);
}

.lead-summary p {
  margin: 0;
  color: #435a50;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid var(--green);
}

.btn.primary {
  color: #fff;
  background: var(--green);
}

.btn.ghost {
  color: var(--green);
  background: rgba(255, 255, 255, .76);
}

.hero-visual {
  position: relative;
  min-height: 560px;
  display: grid;
  align-items: end;
  padding: 34px 24px;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 64px 16px 84px;
  border-radius: 44px;
  background: linear-gradient(145deg, rgba(231, 243, 222, .9), rgba(251, 244, 231, .86));
  border: 1px solid rgba(213, 229, 204, .9);
  box-shadow: var(--shadow);
}

.hero-product {
  position: absolute;
  z-index: 1;
  filter: drop-shadow(0 26px 32px rgba(33, 62, 45, .18));
}

.hero-product.shampoo {
  width: 58%;
  left: 3%;
  bottom: 78px;
}

.hero-product.mask {
  width: 48%;
  right: 1%;
  bottom: 36px;
}

.hero-stats {
  position: relative;
  z-index: 2;
  align-self: end;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: auto;
}

.hero-stats article,
.metric-grid article {
  padding: 18px;
  border: 1px solid rgba(222, 232, 219, .95);
  border-radius: 18px;
  background: rgba(255, 255, 255, .88);
  box-shadow: 0 14px 34px rgba(31, 62, 45, .1);
}

.hero-stats strong,
.metric-grid strong {
  display: block;
  margin-bottom: 4px;
  color: var(--green);
  font-size: 26px;
  line-height: 1.1;
}

.hero-stats span,
.metric-grid span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 70px 0;
}

.section-head {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-head > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.product-card {
  overflow: hidden;
  display: grid;
  grid-template-columns: .82fr 1fr;
  min-height: 620px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, .82);
  box-shadow: var(--shadow);
}

.product-media {
  display: grid;
  place-items: center;
  padding: 30px 18px;
}

.product-media.green {
  background: linear-gradient(180deg, #edf8e8, #dfeeda);
}

.product-media.beige {
  background: linear-gradient(180deg, #fff5e4, #eaf1df);
}

.product-media img {
  width: min(92%, 300px);
}

.product-body {
  padding: 34px 30px;
}

.tag {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--green);
  background: var(--pale);
  font-size: 13px;
  font-weight: 800;
}

.position {
  color: #435a50;
}

.price-row {
  display: grid;
  gap: 2px;
  margin: 20px 0;
  padding: 16px;
  border-radius: 18px;
  background: #f7fbf4;
}

.price-row strong {
  font-size: 26px;
  color: var(--green);
}

.price-row span {
  color: var(--muted);
}

.fact-list {
  margin: 0;
  padding-left: 20px;
  color: #40564b;
}

.fact-list li + li {
  margin-top: 10px;
}

.fact-list b {
  color: var(--green);
}

.science-grid,
.audience-grid,
.safety-layout,
.faq-list {
  display: grid;
  gap: 18px;
}

.science-grid {
  grid-template-columns: repeat(3, 1fr);
}

.science-grid article,
.audience-grid article,
.safety-layout article,
.faq-list article,
.promise-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, .78);
  box-shadow: 0 18px 46px rgba(31, 62, 45, .08);
}

.number {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--green-2);
  font-size: 14px;
  font-weight: 900;
}

.science-grid p,
.audience-grid p,
.safety-layout p,
.faq-list p,
.promise-card p {
  margin-bottom: 0;
  color: #4b5d54;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
}

caption {
  padding: 18px 20px 0;
  color: var(--muted);
  text-align: left;
}

th,
td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--green);
  background: #f3f8ef;
}

td {
  color: #40564b;
}

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

.audience-grid {
  grid-template-columns: repeat(4, 1fr);
}

.safety-layout {
  grid-template-columns: repeat(3, 1fr);
}

.promise-card {
  padding: clamp(28px, 5vw, 52px);
  background:
    linear-gradient(135deg, rgba(36, 86, 66, .94), rgba(62, 111, 82, .92)),
    var(--green);
  color: #fff;
}

.promise-card .eyebrow,
.promise-card p {
  color: rgba(255, 255, 255, .82);
}

.promise-card h2 {
  max-width: 850px;
}

.faq-list {
  grid-template-columns: repeat(2, 1fr);
}

.footer {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 40px 0 54px;
  display: flex;
  justify-content: space-between;
  gap: 28px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer-brand {
  margin-bottom: 10px;
  color: var(--ink);
}

.footer p {
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: flex-start;
}

.footer-links a {
  padding: 8px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
}

@media (max-width: 1040px) {
  .hero,
  .product-grid,
  .science-grid,
  .safety-layout,
  .faq-list {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 520px;
  }

  .product-card {
    min-height: 0;
  }

  .metric-grid,
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .nav {
    width: min(100% - 28px, 1180px);
    min-height: 64px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-menu {
    position: absolute;
    top: 64px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: rgba(255, 254, 250, .98);
    box-shadow: var(--shadow);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .hero,
  .section,
  .footer {
    width: min(100% - 28px, 1180px);
  }

  .hero {
    padding: 38px 0 28px;
    gap: 20px;
  }

  .definition {
    font-size: 16px;
  }

  .lead-summary {
    padding: 16px;
    border-radius: 20px;
  }

  .hero-visual {
    min-height: 430px;
    padding: 20px 10px;
  }

  .hero-visual::before {
    inset: 42px 4px 84px;
    border-radius: 30px;
  }

  .hero-product.shampoo {
    width: 62%;
    left: -8%;
    bottom: 90px;
  }

  .hero-product.mask {
    width: 54%;
    right: -8%;
    bottom: 76px;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
  }

  .hero-stats article {
    padding: 12px 10px;
    border-radius: 14px;
  }

  .hero-stats strong {
    font-size: 20px;
  }

  .product-card {
    grid-template-columns: 1fr;
    border-radius: 22px;
  }

  .product-media {
    padding: 20px;
  }

  .product-media img {
    width: min(74%, 260px);
  }

  .product-body {
    padding: 24px 20px;
  }

  .metric-grid,
  .audience-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 50px 0;
  }

  .footer {
    display: grid;
  }
}

@media (max-width: 420px) {
  .hero-actions {
    display: grid;
  }

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

  .hero-visual {
    min-height: 530px;
  }

  .hero-product.shampoo {
    width: 74%;
    left: -10%;
    bottom: 190px;
  }

  .hero-product.mask {
    width: 64%;
    right: -10%;
    bottom: 164px;
  }
}