:root {
  --green-950: #061d15;
  --green-900: #08271d;
  --green-800: #0d3a2b;
  --green-700: #15533d;
  --gold: #d7aa4a;
  --gold-soft: #f1d586;
  --ivory: #fff7e8;
  --paper: #f8eedb;
  --red: #c31824;
  --ink: #161512;
  --muted: #6c6254;
  --line: rgba(215, 170, 74, 0.28);
  --shadow: 0 28px 80px rgba(2, 19, 13, 0.26);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, Arial, "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin-top: 0; overflow-wrap: anywhere; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: clamp(16px, 2.5vw, 34px);
  align-items: center;
  min-height: 76px;
  padding: 12px clamp(18px, 5vw, 72px);
  color: var(--ivory);
  background: rgba(4, 32, 23, 0.94);
  border-bottom: 1px solid rgba(215, 170, 74, 0.35);
  backdrop-filter: blur(18px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: max-content;
}
.brand-logo {
  width: 52px;
  height: 52px;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid rgba(215, 170, 74, 0.55);
  background: #fff;
}
.brand strong {
  display: block;
  font-size: 1.15rem;
  line-height: 1;
  letter-spacing: 0;
}
.brand small {
  display: block;
  margin-top: 4px;
  color: rgba(255, 247, 232, 0.72);
  font-size: 0.72rem;
}
.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 2.5vw, 32px);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}
.nav-links a {
  position: relative;
  padding: 16px 0;
  color: rgba(255, 247, 232, 0.78);
}
.nav-links a:hover,
.nav-links a.active { color: #fff; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 7px;
  height: 2px;
  background: var(--gold);
}
.language {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: rgba(255, 247, 232, 0.86);
  font-size: 0.85rem;
}
.language select {
  border: 0;
  border-radius: 999px;
  padding: 10px 28px 10px 14px;
  color: var(--green-900);
  background: var(--ivory);
  font-weight: 800;
}
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(215, 170, 74, 0.45);
  border-radius: 8px;
  color: var(--ivory);
  background: rgba(255, 255, 255, 0.06);
  font-size: 1.25rem;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 1fr);
  gap: clamp(30px, 4vw, 68px);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: clamp(46px, 7vw, 88px) clamp(20px, 5vw, 78px);
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 80% 20%, rgba(215, 170, 74, 0.22), transparent 24%),
    radial-gradient(circle at 30% 80%, rgba(195, 24, 36, 0.17), transparent 28%),
    linear-gradient(115deg, rgba(4, 24, 18, 0.97) 0%, rgba(8, 43, 31, 0.95) 42%, rgba(10, 59, 42, 0.86) 100%);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(215, 170, 74, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(215, 170, 74, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 75% 40%, #000, transparent 62%);
}
.hero-copy,
.hero-visual { position: relative; z-index: 1; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  color: var(--gold-soft);
  font-size: 0.88rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}
.eyebrow::before,
.eyebrow::after {
  content: "";
  width: 42px;
  height: 1px;
  background: var(--gold);
}
.hero h1 {
  max-width: 860px;
  margin-bottom: 22px;
  font-size: clamp(2.9rem, 5vw, 4.85rem);
  line-height: 1.02;
  font-weight: 950;
  letter-spacing: 0;
}
.hero h1 span { display: block; }
.hero h1 .gold {
  color: var(--gold-soft);
  text-shadow: 0 10px 32px rgba(215, 170, 74, 0.2);
}
.lead,
.section-lead,
.page-hero p,
.science-band p,
.about-section p,
.quality-section p {
  color: rgba(255, 247, 232, 0.82);
  font-size: clamp(1rem, 1.35vw, 1.18rem);
  line-height: 1.68;
}
.lead { max-width: 720px; margin-bottom: 26px; }
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 8px;
  padding: 0 22px;
  border: 1px solid transparent;
  font-weight: 900;
}
.btn.primary {
  color: #221507;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold));
  box-shadow: 0 16px 34px rgba(215, 170, 74, 0.24);
}
.btn.secondary {
  color: var(--ivory);
  border-color: rgba(215, 170, 74, 0.45);
  background: rgba(255, 247, 232, 0.06);
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(130px, 1fr));
  gap: 12px;
  max-width: 860px;
}
.trust-card {
  min-height: 98px;
  padding: 16px 14px;
  border: 1px solid rgba(215, 170, 74, 0.3);
  border-radius: 8px;
  background: rgba(255, 247, 232, 0.065);
  backdrop-filter: blur(14px);
}
.trust-card span {
  display: block;
  width: 26px;
  height: 26px;
  margin-bottom: 10px;
  border: 2px solid var(--gold);
  border-radius: 50%;
}
.trust-card strong {
  display: block;
  color: var(--ivory);
  font-size: 0.86rem;
  line-height: 1.2;
}
.trust-card small {
  display: block;
  margin-top: 5px;
  color: rgba(255, 247, 232, 0.65);
  line-height: 1.35;
}
.hero-visual {
  min-height: 520px;
  display: grid;
  place-items: center;
}
.hero-visual img {
  width: min(100%, 760px);
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.premium-seal {
  position: absolute;
  right: 3%;
  bottom: 12%;
  display: grid;
  place-items: center;
  width: 142px;
  height: 142px;
  border: 1px solid rgba(215, 170, 74, 0.85);
  border-radius: 50%;
  color: var(--gold-soft);
  background: rgba(6, 29, 21, 0.78);
  box-shadow: 0 0 34px rgba(215, 170, 74, 0.28);
  text-align: center;
  font-weight: 950;
  line-height: 1.14;
}

.band,
.page-section {
  padding: clamp(58px, 7vw, 96px) clamp(20px, 5vw, 78px);
}
.benefits {
  background: linear-gradient(110deg, #fff9ed, #ead39f);
  border-top: 1px solid rgba(215, 170, 74, 0.42);
  border-bottom: 1px solid rgba(215, 170, 74, 0.42);
}
.benefits h2,
.product-section h2,
.quality-section h2,
.about-section h2,
.page-hero h1,
.science-band h2 {
  font-size: clamp(2.05rem, 3.8vw, 4rem);
  line-height: 1.05;
  letter-spacing: 0;
}
.benefit-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 26px;
}
.benefit-grid article {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  min-height: 120px;
  padding-right: 16px;
  border-right: 1px solid rgba(21, 83, 61, 0.24);
}
.benefit-grid i {
  grid-row: 1 / 3;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 3px solid var(--green-700);
  box-shadow: inset 0 0 0 8px rgba(215, 170, 74, 0.18);
}
.benefit-grid h3 { margin-bottom: 6px; color: var(--green-900); font-size: 1.3rem; }
.benefit-grid p { grid-column: 2; color: #4f4739; line-height: 1.45; }

.science-band,
.quality-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(30px, 6vw, 76px);
  align-items: center;
  padding: clamp(60px, 8vw, 104px) clamp(20px, 5vw, 78px);
  color: #fff;
  background:
    radial-gradient(circle at 20% 20%, rgba(215, 170, 74, 0.18), transparent 26%),
    linear-gradient(135deg, var(--green-950), var(--green-800));
}
.science-art img {
  width: min(100%, 560px);
  border-radius: 8px;
  border: 1px solid rgba(215, 170, 74, 0.24);
  box-shadow: var(--shadow);
}
.mini-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0;
}
.mini-badges span {
  display: inline-grid;
  place-items: center;
  min-width: 66px;
  min-height: 44px;
  border: 1px solid rgba(215, 170, 74, 0.5);
  border-radius: 999px;
  color: var(--gold-soft);
  font-weight: 900;
}

.product-section,
.about-section,
.media-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.82fr);
  gap: clamp(30px, 5vw, 70px);
  align-items: center;
  background: var(--ivory);
}
.product-section .eyebrow,
.about-section .eyebrow,
.page-hero .eyebrow { color: var(--green-700); }
.product-section .eyebrow::before,
.product-section .eyebrow::after,
.about-section .eyebrow::before,
.about-section .eyebrow::after,
.page-hero .eyebrow::before,
.page-hero .eyebrow::after { background: var(--gold); }
.product-section h2,
.about-section h2 { color: var(--green-900); }
.product-section p,
.about-section p,
.page-hero p { color: var(--muted); }
.spec-grid,
.pillar-grid,
.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 26px 0;
}
.spec-grid article,
.pillar-grid article,
.detail-grid article {
  min-height: 112px;
  padding: 20px;
  border: 1px solid rgba(21, 83, 61, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}
.spec-grid strong,
.pillar-grid h3,
.detail-grid h2 { display: block; color: var(--green-800); margin-bottom: 8px; font-size: 1.1rem; }
.spec-grid span,
.detail-grid p,
.pillar-grid p { color: var(--muted); line-height: 1.55; }
.product-card {
  display: grid;
  grid-template-columns: 0.78fr 1fr;
  gap: 18px;
  align-items: end;
  padding: 24px;
  border-radius: 8px;
  border: 1px solid rgba(215, 170, 74, 0.34);
  background: linear-gradient(145deg, #fff, #f3e2bf);
  box-shadow: 0 20px 54px rgba(22, 21, 18, 0.1);
}
.product-card img {
  width: 100%;
  height: 360px;
  object-fit: contain;
}
.disclaimer {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.section-head {
  max-width: 780px;
}
.quality-section {
  display: block;
}
.doc-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 30px 0;
}
.doc-card {
  min-height: 148px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 18px;
  border: 1px solid rgba(215, 170, 74, 0.32);
  border-radius: 8px;
  background: rgba(255, 247, 232, 0.08);
}
.doc-card strong { color: var(--ivory); }
.doc-card span { color: rgba(255, 247, 232, 0.68); line-height: 1.4; }
.doc-card em { color: var(--gold-soft); font-style: normal; font-weight: 900; }

.about-section {
  background: linear-gradient(135deg, #fff8eb, #f1dfb7);
}
.page-hero {
  padding: clamp(72px, 9vw, 124px) clamp(20px, 5vw, 78px);
  color: var(--ivory);
  background:
    radial-gradient(circle at 70% 20%, rgba(215, 170, 74, 0.24), transparent 28%),
    linear-gradient(135deg, var(--green-950), var(--green-700));
}
.page-hero .eyebrow { color: var(--gold-soft); }
.page-hero p { max-width: 880px; color: rgba(255, 247, 232, 0.82); }
.detail-grid {
  grid-template-columns: repeat(3, 1fr);
  background: var(--paper);
}
.media-split {
  background: var(--ivory);
}
.media-split img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid rgba(21, 83, 61, 0.13);
}

.faq-section {
  background: #fffaf0;
}
.faq-section .section-head h2 { color: var(--green-900); }
.faq-list {
  max-width: 980px;
  display: grid;
  gap: 12px;
}
details {
  border: 1px solid rgba(21, 83, 61, 0.14);
  border-radius: 8px;
  background: #fff;
}
summary {
  cursor: pointer;
  padding: 20px;
  color: var(--green-900);
  font-weight: 900;
}
details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
  line-height: 1.58;
}
footer {
  display: grid;
  grid-template-columns: 0.7fr 1fr;
  gap: 24px;
  padding: 34px clamp(20px, 5vw, 78px);
  color: rgba(255, 247, 232, 0.72);
  background: var(--green-950);
}
footer strong { color: #fff; font-size: 1.2rem; }
footer p { margin: 6px 0 0; line-height: 1.55; }

@media (max-width: 1060px) {
  .site-header {
    grid-template-columns: auto auto 1fr;
  }
  .menu-toggle {
    display: inline-grid;
    place-items: center;
    order: 3;
    justify-self: end;
  }
  .language { justify-self: end; }
  .nav-links {
    position: absolute;
    left: 16px;
    right: 16px;
    top: calc(100% + 8px);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
    border: 1px solid rgba(215, 170, 74, 0.3);
    border-radius: 8px;
    background: rgba(4, 32, 23, 0.98);
  }
  .nav-open .nav-links { display: flex; }
  .nav-links a { padding: 13px 10px; }
  .hero,
  .science-band,
  .product-section,
  .about-section,
  .media-split {
    grid-template-columns: 1fr;
  }
  .hero-visual { min-height: auto; }
  .benefit-grid,
  .doc-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .site-header {
    grid-template-columns: auto auto;
    padding: 10px 16px;
  }
  .brand-logo { width: 44px; height: 44px; }
  .language {
    grid-column: 1 / -1;
    justify-self: stretch;
  }
  .language select { flex: 1; }
  .menu-toggle { grid-column: 2; grid-row: 1; }
  .hero {
    min-height: auto;
    padding: 38px 18px 48px;
  }
  .hero h1 {
    font-size: clamp(2.45rem, 12vw, 3.8rem);
  }
  .benefit-grid article {
    border-right: 0;
    min-height: auto;
  }
  .lead { font-size: 1rem; }
  .cta-row .btn { width: 100%; }
  .trust-grid,
  .benefit-grid,
  .spec-grid,
  .pillar-grid,
  .doc-grid {
    grid-template-columns: 1fr;
  }
  .premium-seal {
    width: 110px;
    height: 110px;
    right: 10px;
    bottom: 8px;
    font-size: 0.8rem;
  }
  .product-card {
    grid-template-columns: 1fr 1fr;
    padding: 14px;
  }
  .product-card img { height: 230px; }
  footer { grid-template-columns: 1fr; }
}