:root {
  --ink: #0a2530;
  --muted: #4e6a70;
  --aqua: #45d8ce;
  --mint: #9df5d2;
  --ice: #dff9ff;
  --blue: #72c9ff;
  --deep: #106c78;
  --white: #ffffff;
  --glass: rgba(255, 255, 255, 0.58);
  --line: rgba(255, 255, 255, 0.7);
  --shadow: 0 26px 80px rgba(10, 97, 120, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 18% 10%, rgba(157, 245, 210, 0.75), transparent 27rem),
    radial-gradient(circle at 82% 2%, rgba(114, 201, 255, 0.6), transparent 24rem),
    linear-gradient(135deg, #edfffb 0%, #dff9ff 42%, #f7fffd 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.28) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.75), transparent 70%);
}

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

p {
  line-height: 1.75;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 16px 22px 0;
}

.nav {
  width: min(1160px, 100%);
  margin: 0 auto;
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 16px;
  border: 1px solid rgba(255,255,255,0.76);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(22px);
  box-shadow: 0 16px 50px rgba(30, 135, 150, 0.12);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 54px;
  height: 38px;
  border-radius: 16px;
  color: #ffffff;
  font-weight: 900;
  letter-spacing: 0;
  background: linear-gradient(135deg, #11b8b7, #1595d3);
  box-shadow: 0 10px 24px rgba(17, 154, 185, 0.28);
}

.brand-text {
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 10px 12px;
  border-radius: 999px;
  color: #244d57;
  font-size: 14px;
}

.nav-links a:hover {
  background: rgba(71, 209, 202, 0.16);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: rgba(18, 172, 185, 0.12);
  padding: 11px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--deep);
  border-radius: 2px;
}

.section-shell {
  width: min(1160px, calc(100% - 44px));
  margin: 0 auto;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  align-items: center;
  min-height: auto;
  padding: 28px 0 44px;
  gap: 36px;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.eyebrow {
  margin: 0 0 12px;
  color: #087c8b;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  font-size: clamp(38px, 4.7vw, 62px);
  line-height: 1.08;
  color: #062833;
}

.nowrap {
  white-space: nowrap;
}

h2 {
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.08;
  color: #082b35;
}

h3 {
  font-size: 20px;
  line-height: 1.25;
}

.hero-lead {
  max-width: 660px;
  margin: 24px 0 18px;
  color: #315c65;
  font-size: clamp(17px, 2vw, 22px);
}

.summary-card {
  width: min(620px, 100%);
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255,255,255,0.56);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.summary-card strong {
  display: block;
  margin-bottom: 4px;
  color: #0b7684;
}

.summary-card p {
  margin: 0;
  color: #315c65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid transparent;
}

.btn.primary {
  color: #ffffff;
  background: linear-gradient(135deg, #0eb9b3, #168ed2);
  box-shadow: 0 18px 34px rgba(20, 148, 183, 0.28);
}

.btn.secondary {
  color: #0d6574;
  border-color: rgba(13, 137, 151, 0.18);
  background: rgba(255,255,255,0.56);
  backdrop-filter: blur(12px);
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 500px;
  border-radius: 56px;
  background:
    radial-gradient(circle at 50% 75%, rgba(255,255,255,0.92), transparent 10rem),
    linear-gradient(155deg, rgba(231,253,255,0.78), rgba(82,205,222,0.38));
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.72), 0 28px 70px rgba(25, 132, 158, 0.16);
}

.hero-visual::before,
.hero-visual::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.74);
}

.hero-visual::before {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(255,255,255,0.25), transparent 65%);
}

.hero-visual::after {
  width: 760px;
  height: 760px;
  opacity: 0.55;
}

.water-rings {
  position: absolute;
  bottom: 70px;
  width: 390px;
  height: 120px;
  border-radius: 50%;
  background:
    radial-gradient(ellipse, transparent 28%, rgba(255,255,255,0.78) 29%, transparent 31%),
    radial-gradient(ellipse, transparent 52%, rgba(91,213,220,0.32) 53%, transparent 55%),
    radial-gradient(ellipse, rgba(58,195,207,0.18), transparent 68%);
  transform: rotate(-3deg);
}

.iceberg {
  position: absolute;
  bottom: 32px;
  width: 190px;
  height: 150px;
  background: linear-gradient(140deg, rgba(255,255,255,0.92), rgba(176,241,255,0.52));
  clip-path: polygon(0 82%, 18% 40%, 31% 64%, 48% 14%, 68% 70%, 84% 28%, 100% 82%, 100% 100%, 0 100%);
  filter: drop-shadow(0 22px 28px rgba(32, 130, 150, 0.12));
}

.iceberg-left {
  left: 28px;
}

.iceberg-right {
  right: 12px;
  width: 230px;
  height: 175px;
  opacity: 0.82;
}

.product-bottle {
  position: relative;
  z-index: 2;
  width: 250px;
  height: 520px;
  display: grid;
  justify-items: center;
  align-content: start;
  filter: drop-shadow(0 34px 42px rgba(7, 75, 91, 0.34));
  transform: scale(0.9);
}

.pump-head {
  width: 134px;
  height: 36px;
  border-radius: 18px 28px 12px 12px;
  background: linear-gradient(180deg, #ffffff, #dff7fb);
  box-shadow: inset 0 -7px 12px rgba(30, 126, 147, 0.14), 0 2px 0 rgba(18, 121, 143, 0.1);
  transform: translateX(18px);
}

.pump-head::before {
  content: "";
  position: absolute;
  width: 86px;
  height: 16px;
  right: -52px;
  top: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, #efffff, #bfeffa);
}

.pump-neck {
  width: 42px;
  height: 36px;
  background: linear-gradient(90deg, #e8fbff, #ffffff, #d3f3f8);
  box-shadow: inset -5px 0 8px rgba(28, 129, 151, 0.12);
}

.bottle-cap {
  width: 150px;
  height: 54px;
  border-radius: 32px 32px 14px 14px;
  background: linear-gradient(180deg, #ffffff, #e5f9fd);
  border: 1px solid rgba(88, 173, 190, 0.18);
  border-bottom-color: rgba(64, 161, 181, 0.22);
}

.bottle-body {
  position: relative;
  width: 226px;
  height: 380px;
  margin-top: -4px;
  border-radius: 56px 56px 40px 40px;
  background:
    linear-gradient(100deg, rgba(255,255,255,0.98) 0 16%, rgba(198,239,247,0.52) 17% 27%, transparent 28%),
    linear-gradient(145deg, #ffffff 0%, #f8feff 42%, #caedf2 100%);
  border: 1px solid rgba(69, 154, 172, 0.28);
  box-shadow:
    inset -24px -18px 40px rgba(22, 122, 141, 0.16),
    inset 18px 12px 30px rgba(255,255,255,0.94),
    0 0 0 6px rgba(255,255,255,0.16);
}

.label {
  position: absolute;
  inset: 72px 28px auto;
  min-height: 190px;
  border-radius: 32px;
  padding: 28px 20px;
  text-align: center;
  background: linear-gradient(160deg, rgba(214,255,247,0.95), rgba(174,225,249,0.82));
  border: 1px solid rgba(75, 165, 184, 0.22);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.9), 0 12px 24px rgba(36, 137, 158, 0.12);
}

.label-brand {
  display: block;
  font-size: 34px;
  font-weight: 950;
  color: #0a7f91;
}

.label-line {
  display: block;
  width: 58px;
  height: 2px;
  margin: 12px auto 14px;
  background: linear-gradient(90deg, transparent, #10b8b3, transparent);
}

.label-title {
  display: block;
  font-size: 23px;
  line-height: 1.25;
  font-weight: 900;
  color: #14363f;
}

.label-sub {
  display: block;
  margin-top: 12px;
  color: #217783;
  font-size: 11px;
}

.bottle-shadow {
  width: 240px;
  height: 42px;
  margin-top: 18px;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(6, 88, 102, 0.24), transparent 68%);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 28px;
  margin-bottom: 92px;
}

.stats article,
.glass-card,
.audience-grid article,
.steps article,
.review-grid article,
.faq-list article,
.science-panel,
.showcase,
.final-cta {
  border: 1px solid rgba(255,255,255,0.76);
  background: var(--glass);
  backdrop-filter: blur(22px);
  box-shadow: var(--shadow);
}

.stats article {
  padding: 22px;
  border-radius: 24px;
}

.stats strong,
.stats span {
  display: block;
}

.stats strong {
  font-size: 22px;
  color: #0a6876;
}

.stats span {
  margin-top: 8px;
  color: var(--muted);
}

.benefits,
.science,
.specs,
.audience,
.routine,
.showcase,
.reviews,
.faq,
.final-cta {
  margin-bottom: 108px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading p,
.section-intro {
  color: var(--muted);
  font-size: 17px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.glass-card {
  position: relative;
  min-height: 270px;
  padding: 28px;
  border-radius: 30px;
  overflow: hidden;
}

.glass-card::after {
  content: "";
  position: absolute;
  inset: auto -40px -60px auto;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.72), transparent 67%);
}

.glass-card p,
.audience-grid p,
.steps p,
.review-grid p,
.faq-list p,
.showcase p,
.final-cta p,
.ingredient-list p {
  color: var(--muted);
}

.icon-drop,
.icon-snow,
.icon-mint,
.icon-volume {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 22px;
  border-radius: 20px;
  background: linear-gradient(140deg, #ffffff, rgba(126, 231, 229, 0.45));
}

.icon-drop::before {
  content: "";
  width: 20px;
  height: 28px;
  border-radius: 60% 60% 70% 70%;
  background: linear-gradient(#24d4cf, #128ec4);
  transform: rotate(12deg);
}

.icon-snow::before {
  content: "*";
  color: #1596c7;
  font-size: 34px;
  line-height: 1;
}

.icon-mint::before {
  content: "";
  width: 30px;
  height: 20px;
  border-radius: 70% 30% 70% 30%;
  background: linear-gradient(135deg, #8bf5bd, #18bcb7);
  transform: rotate(-22deg);
}

.icon-volume::before {
  content: "";
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 8px solid #19b9c0;
  border-top-color: transparent;
}

.science-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 36px;
  padding: 42px;
  border-radius: 40px;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.68), rgba(205,250,255,0.44)),
    radial-gradient(circle at 80% 10%, rgba(71,216,206,0.24), transparent 18rem);
}

.ingredient-list {
  display: grid;
  gap: 16px;
}

.ingredient-list article {
  padding: 22px;
  border-radius: 24px;
  background: rgba(255,255,255,0.5);
  border: 1px solid rgba(255,255,255,0.7);
}

.spec-table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(255,255,255,0.76);
  border-radius: 30px;
  background: var(--glass);
  backdrop-filter: blur(22px);
  box-shadow: var(--shadow);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

.spec-table th,
.spec-table td {
  padding: 18px 22px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(255,255,255,0.66);
}

.spec-table th {
  color: #0a6876;
  font-size: 15px;
}

.spec-table td {
  color: var(--muted);
  line-height: 1.7;
}

.spec-table td:first-child {
  color: #082b35;
  font-weight: 800;
}

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

.audience-grid,
.steps,
.review-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

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

.audience-grid article,
.steps article,
.review-grid article {
  padding: 24px;
  border-radius: 28px;
}

.steps span {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 20px;
  border-radius: 50%;
  color: #ffffff;
  font-weight: 900;
  background: linear-gradient(135deg, #16c0b7, #168ed2);
}

.showcase {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 36px;
  align-items: center;
  padding: 44px;
  border-radius: 40px;
}

.mini-display {
  position: relative;
  min-height: 350px;
  display: grid;
  grid-template-columns: 210px 1fr;
  align-items: center;
  gap: 26px;
  padding: 28px;
  border-radius: 32px;
  background:
    radial-gradient(circle at 25% 74%, rgba(255,255,255,0.8), transparent 9rem),
    linear-gradient(150deg, rgba(77,214,207,0.24), rgba(116,203,255,0.22));
  overflow: hidden;
}

.mini-display::before {
  content: "";
  position: absolute;
  inset: 42px;
  border: 1px solid rgba(255,255,255,0.58);
  border-radius: 50%;
  transform: scaleX(1.25);
}

.mini-bottle {
  position: relative;
  z-index: 1;
  width: 178px;
  height: 292px;
  margin: 0 auto;
  padding-top: 92px;
  border-radius: 42px 42px 32px 32px;
  text-align: center;
  background:
    linear-gradient(100deg, rgba(255,255,255,0.96) 0 22%, rgba(255,255,255,0.46) 23% 32%, transparent 33%),
    linear-gradient(145deg, #ffffff, #dff6fa);
  box-shadow: 0 28px 38px rgba(20, 112, 130, 0.18), inset -18px -12px 28px rgba(24, 140, 155, 0.08);
}

.mini-bottle::before {
  content: "";
  position: absolute;
  top: -58px;
  left: 50%;
  width: 118px;
  height: 66px;
  border-radius: 24px 24px 12px 12px;
  background: linear-gradient(#ffffff, #e5f9fd);
  transform: translateX(-50%);
}

.mini-bottle span {
  display: block;
  color: #0a7f91;
  font-weight: 950;
  font-size: 30px;
}

.mini-bottle strong {
  display: block;
  margin-top: 18px;
  font-size: 22px;
  line-height: 1.25;
}

.display-note {
  position: relative;
  z-index: 1;
}

.review-grid article p {
  margin-top: 0;
  font-size: 17px;
}

.review-grid strong {
  color: #0b7481;
}

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

.faq-list article {
  padding: 24px 28px;
  border-radius: 26px;
}

.faq-list p {
  margin-bottom: 0;
}

.final-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 44px;
  border-radius: 40px;
  background:
    radial-gradient(circle at 92% 20%, rgba(255,255,255,0.7), transparent 15rem),
    linear-gradient(135deg, rgba(201,255,239,0.68), rgba(203,239,255,0.62));
}

.final-cta div {
  max-width: 760px;
}

.site-footer {
  width: min(1160px, calc(100% - 44px));
  margin: 0 auto;
  padding: 0 0 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: #3e626a;
}

.site-footer p {
  margin: 6px 0 0;
}

.site-footer a {
  font-weight: 800;
  color: #0b7684;
}

@media (max-width: 980px) {
  .hero,
  .science-panel,
  .showcase {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 46px;
  }

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

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

@media (max-width: 760px) {
  .site-header {
    padding: 10px 12px 0;
  }

  .nav {
    border-radius: 22px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 8px);
    left: 12px;
    right: 12px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border-radius: 22px;
    background: rgba(255,255,255,0.9);
    box-shadow: 0 18px 40px rgba(20, 112, 130, 0.16);
  }

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

  .nav-links a {
    padding: 13px 14px;
  }

  .brand-text {
    display: none;
  }

  .section-shell,
  .site-footer {
    width: min(100% - 28px, 1160px);
  }

  h1 {
    font-size: clamp(34px, 9.5vw, 48px);
  }

  .nowrap {
    white-space: normal;
  }

  .hero {
    gap: 24px;
    padding-bottom: 46px;
  }

  .hero-visual {
    min-height: 500px;
    border-radius: 36px;
  }

  .product-bottle {
    transform: scale(0.84);
  }

  .stats,
  .card-grid,
  .audience-grid,
  .steps,
  .review-grid,
  .mini-display {
    grid-template-columns: 1fr;
  }

  .stats,
  .benefits,
  .science,
  .specs,
  .audience,
  .routine,
  .showcase,
  .reviews,
  .faq,
  .final-cta {
    margin-bottom: 70px;
  }

  .science-panel,
  .showcase,
  .final-cta {
    padding: 26px;
    border-radius: 30px;
  }

  .mini-display {
    padding-top: 86px;
  }

  .display-note {
    text-align: center;
  }

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

  .btn {
    width: 100%;
  }
}

@media (max-width: 430px) {
  .hero-actions {
    flex-direction: column;
  }

  .summary-card {
    padding: 16px;
  }

  .hero-visual {
    min-height: 450px;
  }

  .product-bottle {
    transform: scale(0.75);
  }

  .iceberg-left {
    left: -44px;
  }

  .iceberg-right {
    right: -72px;
  }
}