:root {
  --ink: #0b2d33;
  --muted: #53727a;
  --teal: #0c8f94;
  --green: #36c98f;
  --blue: #1677c8;
  --pale: #eaf9f7;
  --line: rgba(11, 45, 51, 0.11);
  --shadow: 0 22px 60px rgba(20, 88, 105, 0.16);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  background:
    radial-gradient(circle at 8% 8%, rgba(54, 201, 143, 0.22), transparent 28rem),
    linear-gradient(180deg, #f6fffe 0%, #eefbf8 42%, #ffffff 100%);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1180px, calc(100% - 32px));
  margin: 14px auto 0;
  padding: 12px 14px 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 16px 42px rgba(18, 86, 95, 0.12);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 36px;
  border-radius: var(--radius);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0;
  background: linear-gradient(135deg, #0e8aa0, #34bd8a);
}

.brand-text {
  color: #285963;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #315f67;
  font-size: 14px;
  font-weight: 700;
}

.site-nav a {
  padding: 8px 10px;
  border-radius: var(--radius);
}

.site-nav a:hover {
  background: rgba(12, 143, 148, 0.09);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(340px, 0.86fr);
  gap: 34px;
  align-items: start;
  width: min(1180px, calc(100% - 32px));
  min-height: calc(100svh - 88px);
  margin: 0 auto;
  padding: 28px 0 30px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.bubble,
.molecule {
  position: absolute;
  border-radius: 999px;
}

.bubble-one {
  width: 260px;
  height: 260px;
  right: 16%;
  top: 6%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.95), rgba(54, 201, 143, 0.12) 62%, transparent 70%);
}

.bubble-two {
  width: 160px;
  height: 160px;
  left: -38px;
  bottom: 8%;
  background: radial-gradient(circle, rgba(22, 119, 200, 0.16), transparent 70%);
}

.molecule {
  width: 82px;
  height: 82px;
  border: 1px solid rgba(12, 143, 148, 0.22);
}

.molecule::before,
.molecule::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 6px rgba(54, 201, 143, 0.14);
}

.molecule::before {
  left: -6px;
  top: 16px;
}

.molecule::after {
  right: 6px;
  bottom: -4px;
}

.molecule-one {
  left: 42%;
  top: 14%;
}

.molecule-two {
  right: 2%;
  bottom: 18%;
  transform: scale(0.7);
}

.hero-content,
.hero-visual {
  position: relative;
  z-index: 1;
}

.hero-content {
  padding-top: 18px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 760px;
  margin: 0;
  color: #062b31;
  font-size: clamp(42px, 6.2vw, 82px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  color: #092f36;
  font-size: clamp(28px, 3.4vw, 46px);
  line-height: 1.16;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  color: #0d3b42;
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: 0;
}

.subtitle {
  margin: 14px 0 0;
  color: #116e7b;
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 800;
}

.lead {
  max-width: 700px;
  margin: 16px 0 0;
  color: #315b63;
  font-size: 18px;
}

.summary {
  max-width: 710px;
  margin-top: 18px;
  padding: 14px 18px;
  border: 1px solid rgba(12, 143, 148, 0.16);
  border-radius: var(--radius);
  color: #254f57;
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 12px 32px rgba(12, 143, 148, 0.08);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-weight: 800;
}

.button.primary {
  color: #fff;
  background: linear-gradient(135deg, #087b91, #21b982);
  box-shadow: 0 16px 34px rgba(11, 143, 137, 0.25);
}

.button.secondary {
  color: #0e6672;
  border: 1px solid rgba(12, 143, 148, 0.22);
  background: #fff;
}

.claim-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  max-width: 700px;
  margin-top: 22px;
}

.claim-grid span {
  padding: 10px 12px;
  border: 1px solid rgba(12, 143, 148, 0.14);
  border-radius: var(--radius);
  color: #155b63;
  font-size: 14px;
  font-weight: 800;
  text-align: center;
  background: rgba(255, 255, 255, 0.72);
}

.hero-visual {
  min-height: 500px;
  padding: 0 66px 0 38px;
  display: grid;
  place-items: center;
  overflow: visible;
}

.product-card {
  position: relative;
  width: min(390px, 100%);
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(238, 255, 251, 0.8)),
    radial-gradient(circle at 50% 0%, rgba(54, 201, 143, 0.2), transparent 60%);
  box-shadow: var(--shadow);
}

.product-card::after {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: 16px;
  height: 30px;
  border-radius: 50%;
  background: rgba(8, 71, 78, 0.14);
  filter: blur(14px);
}

.product-card img {
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 28px 34px rgba(13, 72, 76, 0.2));
}

.floating-note {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: var(--radius);
  color: #145f67;
  font-size: 14px;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 16px 34px rgba(20, 88, 105, 0.14);
  backdrop-filter: blur(14px);
}

.note-top {
  top: 74px;
  right: 0;
}

.note-bottom {
  left: 0;
  bottom: 76px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 6px rgba(54, 201, 143, 0.16);
}

.section {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 78px 0;
}

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

.section-heading p:last-child,
.ingredient-copy p,
.usage-content p,
.site-footer p {
  color: var(--muted);
}

.intro-band {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: 28px;
  align-items: center;
  padding: 34px;
  border: 1px solid rgba(12, 143, 148, 0.13);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(232, 250, 247, 0.92));
  box-shadow: 0 18px 46px rgba(20, 88, 105, 0.1);
}

.intro-band .section-heading {
  margin-bottom: 0;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.metrics article {
  min-height: 132px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.76);
}

.metrics strong {
  display: block;
  color: #087b91;
  font-size: 26px;
  line-height: 1.1;
}

.metrics span {
  display: block;
  margin-top: 10px;
  color: #4e6f76;
  font-size: 14px;
  font-weight: 700;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.benefit-card,
.reviews article,
.audience-grid article,
.ingredient-panel,
.notice,
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 14px 38px rgba(20, 88, 105, 0.09);
}

.benefit-card {
  min-height: 270px;
  padding: 22px;
}

.benefit-card p,
.reviews p,
.audience-grid li,
.faq-answer p,
.steps li {
  color: var(--muted);
}

.icon {
  position: relative;
  width: 54px;
  height: 54px;
  margin-bottom: 20px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(22, 119, 200, 0.14), rgba(54, 201, 143, 0.22));
}

.icon::before,
.icon::after {
  content: "";
  position: absolute;
}

.scalp-icon::before {
  width: 30px;
  height: 22px;
  left: 12px;
  top: 16px;
  border: 3px solid #0c8f94;
  border-top: 0;
  border-radius: 0 0 22px 22px;
}

.calm-icon::before {
  width: 24px;
  height: 24px;
  left: 15px;
  top: 15px;
  border-radius: 50%;
  background: conic-gradient(from 45deg, #1677c8, #36c98f, #1677c8);
}

.oil-icon::before {
  width: 22px;
  height: 30px;
  left: 16px;
  top: 10px;
  border-radius: 22px 22px 22px 6px;
  background: #0c8f94;
  transform: rotate(45deg);
}

.barrier-icon::before {
  width: 30px;
  height: 34px;
  left: 12px;
  top: 10px;
  border-radius: 18px 18px 14px 14px;
  background: linear-gradient(180deg, #1677c8, #36c98f);
  clip-path: polygon(50% 0, 92% 16%, 82% 82%, 50% 100%, 18% 82%, 8% 16%);
}

.ingredient-section,
.usage-section,
.audience-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.95fr);
  gap: 28px;
  align-items: center;
}

.ingredient-copy {
  max-width: 720px;
}

.ingredient-panel {
  padding: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(236, 252, 249, 0.92)),
    radial-gradient(circle at 80% 16%, rgba(22, 119, 200, 0.16), transparent 15rem);
}

.compound {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.compound span {
  display: inline-grid;
  place-items: center;
  min-width: 72px;
  height: 72px;
  padding: 0 12px;
  border-radius: 999px;
  color: #fff;
  font-weight: 900;
  background: linear-gradient(135deg, #1677c8, #1bb58c);
  box-shadow: 0 12px 28px rgba(12, 143, 148, 0.2);
}

.compound i {
  width: 42px;
  height: 2px;
  background: rgba(12, 143, 148, 0.35);
}

.ingredient-panel ul,
.audience-grid ul {
  margin: 0;
  padding-left: 20px;
}

.ingredient-panel li + li,
.audience-grid li + li {
  margin-top: 12px;
}

.usage-section {
  align-items: stretch;
}

.usage-visual {
  display: grid;
  align-items: center;
  min-height: 520px;
  padding: 28px;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(10, 137, 160, 0.88), rgba(50, 194, 139, 0.78)),
    radial-gradient(circle at 25% 20%, rgba(255, 255, 255, 0.45), transparent 16rem);
  box-shadow: var(--shadow);
}

.usage-visual img {
  border-radius: var(--radius);
  box-shadow: 0 22px 50px rgba(6, 43, 49, 0.22);
}

.usage-content {
  padding: 8px 0;
}

.steps {
  display: grid;
  gap: 12px;
  margin: 24px 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
}

.steps span {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  color: #fff;
  font-weight: 900;
  background: linear-gradient(135deg, #087b91, #21b982);
}

.notice {
  padding: 20px;
  background: #fffdf8;
}

.notice h3 {
  color: #6c4a00;
}

.audience-grid {
  align-items: stretch;
}

.audience-grid article {
  padding: 26px;
}

.caution-card {
  background: linear-gradient(180deg, #ffffff, #fff8ee);
}

.reviews {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.reviews article {
  padding: 22px;
}

.stars {
  color: #0c8f94;
  font-size: 16px;
  letter-spacing: 0;
}

.reviews span {
  color: #2c6a72;
  font-size: 14px;
  font-weight: 800;
}

.faq-section {
  max-width: 940px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  overflow: hidden;
}

.faq-item button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 18px 20px;
  border: 0;
  color: #0d3b42;
  font: inherit;
  font-weight: 850;
  text-align: left;
  background: transparent;
  cursor: pointer;
}

.faq-item button b {
  position: relative;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(12, 143, 148, 0.12);
}

.faq-item button b::before,
.faq-item button b::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  width: 10px;
  height: 2px;
  background: #0c8f94;
}

.faq-item button b::after {
  transform: rotate(90deg);
}

.faq-item button[aria-expanded="true"] b::after {
  transform: rotate(0);
}

.faq-answer {
  padding: 0 20px 18px;
}

.faq-answer p {
  margin: 0;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 24px;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto 28px;
  padding: 30px;
  border-radius: var(--radius);
  color: #d9fffb;
  background: linear-gradient(135deg, #06343b, #075866);
}

.site-footer strong {
  font-size: 26px;
  letter-spacing: 0;
}

.site-footer p {
  margin: 8px 0 0;
  color: rgba(229, 255, 251, 0.78);
}

.disclaimer {
  align-self: center;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero,
  .intro-band,
  .ingredient-section,
  .usage-section,
  .audience-grid,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 54px;
  }

  .hero-visual {
    min-height: auto;
  }

  .card-grid,
  .reviews {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 640px) {
  .site-header,
  .hero,
  .section,
  .site-footer {
    width: min(100% - 24px, 1180px);
  }

  .hero {
    gap: 28px;
    min-height: auto;
  }

  h1 {
    font-size: 40px;
  }

  .lead {
    font-size: 16px;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .claim-grid,
  .card-grid,
  .reviews {
    grid-template-columns: 1fr;
  }

  .intro-band {
    padding: 22px;
  }

  .section {
    padding: 56px 0;
  }

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

  .compound {
    flex-wrap: wrap;
  }

  .compound i {
    width: 28px;
  }

  .usage-visual {
    min-height: auto;
    padding: 16px;
  }

  .floating-note {
    position: static;
    margin-top: 10px;
  }
}