/* ===================================================
   AMERIGROUP 礼锦生 – Light Sky Blue Theme
   =================================================== */

/* ── CSS Variables ── */
:root {
  --bg:      #EDF7FF;
  --bg2:     #FFFFFF;
  --bg3:     #D5ECFA;
  --text:    #0C2A4A;
  --text2:   #2E5070;
  --text3:   #5A7A98;
  --blue1:   #0070BB;
  --blue2:   #0099DD;
  --accent:  #00BBEE;
  --sky:     #87CEEB;
  --white:   #FFFFFF;
  --card:    rgba(255,255,255,0.92);
  --glass:   rgba(255,255,255,0.65);
  --glass2:  rgba(255,255,255,0.88);
  --border:  rgba(0,140,200,0.22);
  --border2: rgba(0,140,200,0.12);
  --shadow:  0 8px 40px rgba(0,100,180,0.1);
  --shadow2: 0 4px 20px rgba(0,100,180,0.08);
  --radius:  16px;
  --radius2: 24px;
  --trans:   all .35s cubic-bezier(.4,0,.2,1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Open Sans', 'Noto Sans SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a   { text-decoration: none; color: inherit; }
ul  { list-style: none; }
button { cursor: pointer; border: none; background: none; }

/* ── Bilingual ── */
[data-lang="en"] .cn { display: none !important; }
[data-lang="cn"] .en { display: none !important; }

/* ── Container / Section ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; position: relative; }

/* ── Bubble Layer (injected by JS into every section) ── */
.bubble-layer {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.bubble-layer .bl {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%,
    rgba(255,255,255,0.6), rgba(135,206,235,0.25));
  border: 1.5px solid rgba(100,190,240,0.35);
  animation: bl-rise var(--d,8s) ease-in var(--dl,0s) infinite;
  bottom: -80px;
}
@keyframes bl-rise {
  0%   { transform: translateX(0) scale(0.6); opacity: 0; }
  8%   { opacity: 0.85; }
  88%  { opacity: 0.5; }
  100% { transform: translateX(var(--dx,10px)) scale(1.1); opacity: 0;
         bottom: 110%; }
}
/* All sections need relative positioning for the bubble layer */
.about, .science, .benefits, .products, .research, .contact { position: relative; }
/* content inside sections must be above bubbles */
.about .container, .science .container, .benefits .container,
.products .container, .research .container, .contact .container { position: relative; z-index: 1; }

/* ═══════════════════════════════════════════════
   NAVBAR
   ═══════════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: var(--trans);
}
.navbar.scrolled {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  box-shadow: 0 4px 24px rgba(0,100,180,0.1);
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.nav-logo {
  height: 44px; width: auto;
  border-radius: 8px;
  object-fit: contain;
  background: rgba(255,255,255,0.9);
  padding: 4px;
  box-shadow: 0 2px 8px rgba(0,100,180,0.15);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-en {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: .8rem;
  letter-spacing: 2px;
  color: var(--white);
}
.navbar.scrolled .brand-en { color: var(--blue1); }
.brand-cn {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
}
.navbar.scrolled .brand-cn { color: var(--text); }
.nav-menu { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.nav-link {
  font-size: .875rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  color: rgba(255,255,255,0.9);
  transition: var(--trans);
  white-space: nowrap;
}
.navbar.scrolled .nav-link { color: var(--text2); }
.nav-link:hover {
  color: var(--white);
  background: rgba(255,255,255,0.15);
}
.navbar.scrolled .nav-link:hover { color: var(--blue1); background: rgba(0,130,200,0.08); }
.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1.5px solid rgba(255,255,255,0.4);
  border-radius: 20px;
  font-size: .8rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  background: rgba(255,255,255,0.12);
  transition: var(--trans);
  letter-spacing: .5px;
}
.lang-toggle:hover { border-color: var(--white); color: var(--white); background: rgba(255,255,255,0.2); }
.navbar.scrolled .lang-toggle {
  border-color: var(--border);
  color: var(--text2);
  background: transparent;
}
.navbar.scrolled .lang-toggle:hover { border-color: var(--blue2); color: var(--blue1); }
.lang-toggle .divider { opacity: .4; }
[data-lang="en"] .lang-toggle .l-en,
[data-lang="en"] .navbar.scrolled .lang-toggle .l-en { color: var(--accent); }
[data-lang="cn"] .lang-toggle .l-cn,
[data-lang="cn"] .navbar.scrolled .lang-toggle .l-cn { color: var(--accent); }
.navbar.scrolled [data-lang="en"] .l-en { color: var(--blue1) !important; }
.navbar.scrolled [data-lang="cn"] .l-cn { color: var(--blue1) !important; }

/* Hamburger */
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--white); border-radius: 2px; transition: var(--trans);
}
.navbar.scrolled .hamburger span { background: var(--text); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ═══════════════════════════════════════════════
   HERO  (keeps sky-blue canvas bg, white text)
   ═══════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-canvas { position: absolute; inset: 0; z-index: 0; }
#bubbleCanvas { width: 100%; height: 100%; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(150deg,
    rgba(0,80,160,0.75) 0%,
    rgba(0,130,200,0.55) 45%,
    rgba(80,190,240,0.35) 100%);
  z-index: 1;
}
.hero-content {
  position: relative; z-index: 2;
  text-align: center;
  padding: 120px 24px 80px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border: 1.5px solid rgba(255,255,255,0.45);
  border-radius: 30px;
  font-size: .8rem;
  font-weight: 600;
  color: var(--white);
  background: rgba(255,255,255,0.15);
  letter-spacing: .5px;
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}
.hero-title {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  color: var(--white);
  text-shadow: 0 2px 24px rgba(0,50,120,0.35);
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(90deg, #fff 0%, #bbe4ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-title .cn { font-family: 'Noto Sans SC', sans-serif; font-size: clamp(2rem, 5vw, 3.5rem); }
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.85);
  margin-bottom: 40px;
  line-height: 1.8;
}
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 56px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: .95rem;
  transition: var(--trans);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue1), var(--blue2));
  color: var(--white);
  box-shadow: 0 6px 24px rgba(0,130,200,0.4);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 32px rgba(0,130,200,0.5); }
.btn-ghost {
  border: 2px solid rgba(255,255,255,0.6);
  color: var(--white);
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { border-color: var(--white); background: rgba(255,255,255,0.22); transform: translateY(-3px); }
.btn-outline { border: 1.5px solid var(--blue2); color: var(--blue2); }
.btn-outline:hover { background: var(--blue2); color: var(--white); transform: translateY(-3px); }
.btn-full { width: 100%; justify-content: center; }

/* Hero stats */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  background: rgba(255,255,255,0.18);
  backdrop-filter: blur(20px);
  border: 1.5px solid rgba(255,255,255,0.35);
  border-radius: var(--radius2);
  padding: 24px 40px;
  max-width: 680px;
  margin: 0 auto;
  box-shadow: 0 8px 32px rgba(0,80,160,0.2);
}
.h-stat { text-align: center; padding: 0 32px; }
.h-num {
  display: block;
  font-family: 'Montserrat', sans-serif;
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--white);
}
.h-lbl { font-size: .75rem; color: rgba(255,255,255,0.75); letter-spacing: .5px; display: block; margin-top: 4px; }
.h-divider { width: 1px; height: 48px; background: rgba(255,255,255,0.3); }

/* Scroll cue */
.scroll-cue {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(255,255,255,0.55);
  font-size: .9rem;
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%,100%{ transform: translateX(-50%) translateY(0); }
  50%     { transform: translateX(-50%) translateY(8px); }
}

/* ─ Reveal animations ─ */
.fade-up { opacity: 0; transform: translateY(28px); transition: opacity .65s ease, transform .65s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up:nth-child(2) { transition-delay: .1s; }
.fade-up:nth-child(3) { transition-delay: .2s; }
.fade-up:nth-child(4) { transition-delay: .3s; }
.fade-up:nth-child(5) { transition-delay: .4s; }
.reveal { opacity: 0; transform: translateY(36px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ═══════════════════════════════════════════════
   SECTION HEADERS  (light bg – dark text)
   ═══════════════════════════════════════════════ */
.section-header { text-align: center; margin-bottom: 64px; }
.sec-tag {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--blue1);
  padding: 6px 16px;
  border: 1.5px solid rgba(0,140,200,0.3);
  border-radius: 20px;
  margin-bottom: 14px;
  background: rgba(0,140,200,0.06);
}
.sec-title {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-size: clamp(1.8rem, 3.5vw, 2.7rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 18px;
}
.sec-desc { font-size: 1.02rem; color: var(--text2); max-width: 700px; margin: 0 auto; }

/* ═══════════════════════════════════════════════
   ABOUT  (white bg)
   ═══════════════════════════════════════════════ */
.about { background: var(--bg2); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-visual { display: flex; flex-direction: column; align-items: center; gap: 32px; }

.molecule-ring {
  position: relative;
  width: 260px; height: 260px;
  background: radial-gradient(circle, rgba(0,160,230,0.1), transparent 70%);
  border-radius: 50%;
  border: 1.5px solid rgba(0,160,230,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 60px rgba(0,150,220,0.15), 0 0 0 8px rgba(0,160,230,0.05);
}
.mol-svg { width: 200px; height: 200px; }
.mol-o  { animation: pulse-o 3s ease-in-out infinite; }
.mol-h1 { animation: pulse-h 3s ease-in-out infinite .5s; }
.mol-h2 { animation: pulse-h 3s ease-in-out infinite 1s; }
@keyframes pulse-o { 0%,100%{ r:55;opacity:.9; } 50%{ r:61;opacity:1; } }
@keyframes pulse-h { 0%,100%{ r:34;opacity:.9; } 50%{ r:37;opacity:1; } }
.mol-label {
  position: absolute; bottom: -14px; left: 50%; transform: translateX(-50%);
  font-family: 'Montserrat', sans-serif; font-size: .7rem; font-weight: 700;
  letter-spacing: 3px; color: var(--blue2); white-space: nowrap;
}
.about-badge-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; width: 100%; }
.a-badge {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: rgba(0,150,220,0.04);
  font-size: .85rem; font-weight: 600;
  color: var(--text2);
  transition: var(--trans);
}
.a-badge:hover { border-color: var(--blue2); background: rgba(0,150,220,0.08); color: var(--text); }
.a-badge i { color: var(--blue2); font-size: 1rem; }

.about-content .sec-tag { margin-bottom: 10px; }
.about-text { color: var(--text2); margin-bottom: 16px; font-size: .97rem; }
.about-text strong { color: var(--blue1); }
.check-list { display: flex; flex-direction: column; gap: 11px; margin: 22px 0 26px; }
.check-list li { display: flex; align-items: center; gap: 12px; font-size: .92rem; color: var(--text2); }
.check-list i { color: var(--blue2); font-size: 1rem; flex-shrink: 0; }
.offices { display: flex; flex-wrap: wrap; gap: 10px; }
.office-chip {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  font-size: .78rem; color: var(--text3);
  background: rgba(0,150,220,0.04);
}
.office-chip i { color: var(--blue2); font-size: .75rem; }

/* ═══════════════════════════════════════════════
   SCIENCE  (light sky-blue bg)
   ═══════════════════════════════════════════════ */
.science { background: var(--bg3); overflow: hidden; }
.science-bg-wrap { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.science-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 65% 40%, rgba(100,190,255,0.35), transparent 55%);
}
.science .container { position: relative; z-index: 1; }
.science .section-header { margin-bottom: 52px; }
.science-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 52px; }
.sci-card {
  padding: 34px 26px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius2);
  background: var(--card);
  backdrop-filter: blur(10px);
  transition: var(--trans);
  box-shadow: var(--shadow2);
}
.sci-card:hover {
  border-color: var(--blue2);
  box-shadow: var(--shadow);
  transform: translateY(-6px);
}
.sci-icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--blue1), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: var(--white);
  margin-bottom: 18px;
  box-shadow: 0 6px 20px rgba(0,130,200,0.28);
}
.sci-card h3 {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-size: 1rem; font-weight: 700;
  margin-bottom: 10px; color: var(--text);
}
.sci-card p { font-size: .87rem; color: var(--text2); line-height: 1.75; }
.sci-quote {
  border-left: 3px solid var(--blue2);
  padding: 22px 30px;
  background: rgba(0,140,200,0.07);
  border-radius: 0 var(--radius) var(--radius) 0;
  max-width: 780px; margin: 0 auto;
}
.sci-quote p {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-size: 1.05rem; font-weight: 600;
  font-style: italic; color: var(--text);
  margin-bottom: 10px;
}
.sci-quote p.cn { font-size: .98rem; }
.sci-quote cite { font-size: .8rem; color: var(--blue1); letter-spacing: .5px; }

/* ═══════════════════════════════════════════════
   BENEFITS  (very light blue bg)
   ═══════════════════════════════════════════════ */
.benefits { background: var(--bg); }
.benefits-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.ben-card {
  padding: 30px 24px;
  border: 1.5px solid var(--border2);
  border-radius: var(--radius2);
  background: var(--card);
  transition: var(--trans);
  position: relative; overflow: hidden;
  box-shadow: var(--shadow2);
}
.ben-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--blue2), transparent);
  opacity: 0; transition: var(--trans);
}
.ben-card:hover {
  border-color: var(--blue2);
  box-shadow: 0 10px 36px rgba(0,120,200,0.14);
  transform: translateY(-5px);
}
.ben-card:hover::before { opacity: 1; }
.ben-icon {
  width: 50px; height: 50px;
  border-radius: 14px;
  background: rgba(0,140,210,0.1);
  border: 1.5px solid rgba(0,140,210,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem;
  color: var(--blue2);
  margin-bottom: 16px;
}
.ben-card h3 {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-size: .98rem; font-weight: 700;
  margin-bottom: 9px; color: var(--text);
}
.ben-card p { font-size: .85rem; color: var(--text2); line-height: 1.75; }

/* ═══════════════════════════════════════════════
   STATS BAND  (deep blue – white text)
   ═══════════════════════════════════════════════ */
.stats-band {
  background: linear-gradient(135deg, #005AA0, #0088CC);
  padding: 56px 0; overflow: hidden;
  position: relative;
}
.stats-band .bubble-layer .bl {
  background: radial-gradient(circle at 35% 35%, rgba(255,255,255,0.3), rgba(255,255,255,0.05));
  border-color: rgba(255,255,255,0.25);
}
.stats-row { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; }
.st-item { text-align: center; padding: 16px 48px; }
.st-num {
  display: block;
  font-family: 'Montserrat', sans-serif;
  font-size: 2.5rem; font-weight: 800;
  color: var(--white);
}
.st-suffix { font-size: 1.6rem; font-weight: 800; color: #B8E8FF; }
.st-lbl { font-size: .75rem; color: rgba(255,255,255,0.75); letter-spacing: .5px; display: block; margin-top: 6px; }
.st-div { width: 1px; height: 60px; background: rgba(255,255,255,0.25); }

/* ═══════════════════════════════════════════════
   PRODUCTS  (white bg)
   ═══════════════════════════════════════════════ */
.products { background: var(--bg2); }
.product-layout { display: grid; grid-template-columns: 1fr 1.1fr; gap: 80px; align-items: center; }
.product-bottle-wrap { display: flex; justify-content: center; }
.bottle-scene { position: relative; width: 200px; display: flex; flex-direction: column; align-items: center; }
.bottle-glow {
  position: absolute; top: 15%; left: 50%; transform: translateX(-50%);
  width: 150px; height: 300px;
  background: radial-gradient(ellipse, rgba(0,160,230,0.2), transparent 70%);
  filter: blur(22px); pointer-events: none;
}
.bottle { display: flex; flex-direction: column; align-items: center; width: 120px; }
.bottle-cap {
  width: 44px; height: 28px;
  background: linear-gradient(180deg, #4AABDA, #1A80C0);
  border-radius: 6px 6px 0 0;
  border: 1.5px solid rgba(0,140,200,0.4); border-bottom: none;
}
.bottle-neck {
  width: 52px; height: 30px;
  background: linear-gradient(180deg, rgba(180,230,255,0.4), rgba(140,200,240,0.25));
  border: 1.5px solid rgba(0,160,220,0.35);
  border-radius: 2px;
}
.bottle-body {
  width: 120px; height: 260px;
  border: 1.5px solid rgba(0,160,220,0.35);
  border-radius: 16px;
  background: linear-gradient(160deg,
    rgba(200,235,255,0.5) 0%,
    rgba(160,215,245,0.35) 40%,
    rgba(200,235,255,0.25) 100%);
  position: relative; overflow: hidden;
  backdrop-filter: blur(4px);
  box-shadow: inset 0 0 20px rgba(0,160,220,0.1);
}
.bottle-label {
  position: absolute; inset: 24px 12px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 6px;
  background: rgba(255,255,255,0.85);
  border-radius: 10px;
  border: 1px solid rgba(0,160,220,0.2);
  padding: 12px 8px;
  box-shadow: 0 2px 10px rgba(0,100,180,0.08);
}
.lbl-logo { width: 56px; height: auto; border-radius: 6px; }
.lbl-brand {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 1rem; font-weight: 700;
  color: var(--text); letter-spacing: 2px;
}
.lbl-sub { font-size: .52rem; color: var(--text3); text-align: center; letter-spacing: .5px; }
.lbl-h2 {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.1rem; font-weight: 800;
  color: var(--blue1); letter-spacing: 1px;
}
.bottle-base {
  width: 120px; height: 18px;
  background: linear-gradient(180deg, #4AABDA, #1A80C0);
  border-radius: 0 0 12px 12px;
  border: 1.5px solid rgba(0,140,200,0.4); border-top: none;
}
.water-fill {
  position: absolute; bottom: 0; left: 0; right: 0; height: 65%;
  background: linear-gradient(180deg, rgba(100,200,255,0.25), rgba(0,140,220,0.45));
  overflow: hidden;
}
.bub {
  position: absolute; bottom: -10px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: rgba(200,240,255,0.8);
  animation: rise 3s ease-in infinite;
}
.bub-lg { width: 10px; height: 10px; }
@keyframes rise { 0%{ bottom:-10px;opacity:.8; } 100%{ bottom:105%;opacity:0; } }

.product-details h3 {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-size: 1.35rem; font-weight: 800;
  margin-bottom: 14px; color: var(--text);
}
.product-details > p { color: var(--text2); margin-bottom: 26px; }
.spec-table { margin-bottom: 22px; }
.spec-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 11px 0;
  border-bottom: 1px solid rgba(0,140,200,0.1);
  font-size: .9rem; gap: 12px;
}
.spec-row:last-child { border-bottom: none; }
.spec-k { color: var(--text3); flex: 1; }
.spec-v { color: var(--blue1); font-weight: 600; font-family: 'Montserrat', sans-serif; }
.product-features { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.pf-tag {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  background: rgba(0,140,210,0.07);
  border: 1.5px solid rgba(0,140,210,0.2);
  border-radius: 20px;
  font-size: .78rem; font-weight: 600; color: var(--blue1);
}

/* ═══════════════════════════════════════════════
   RESEARCH  (light bg)
   ═══════════════════════════════════════════════ */
.research { background: var(--bg); }
.research-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 52px; }
.res-card {
  display: flex; flex-direction: column;
  padding: 26px 22px;
  border: 1.5px solid var(--border2);
  border-radius: var(--radius2);
  background: var(--card);
  transition: var(--trans);
  box-shadow: var(--shadow2);
}
.res-card:hover {
  border-color: var(--blue2);
  box-shadow: var(--shadow);
  transform: translateY(-5px);
}
.res-header { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; color: var(--blue2); font-size: 1.2rem; }
.res-src { font-size: .7rem; font-weight: 700; letter-spacing: 1px; color: var(--text3); text-transform: uppercase; }
.res-body { flex: 1; }
.res-body h4 {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-size: .93rem; font-weight: 700;
  margin-bottom: 7px; color: var(--text);
}
.res-body p { font-size: .82rem; color: var(--text2); line-height: 1.7; }
.res-read {
  display: flex; align-items: center; gap: 8px;
  margin-top: 14px; font-size: .8rem; font-weight: 600;
  color: var(--blue1); transition: var(--trans);
}
.res-card:hover .res-read { gap: 12px; }
.journals-band {
  padding: 34px 38px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius2);
  background: var(--card);
  text-align: center;
  box-shadow: var(--shadow2);
}
.journals-title { font-size: .84rem; color: var(--text2); margin-bottom: 14px; }
.journals-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.j-chip {
  padding: 8px 18px;
  border: 1.5px solid rgba(0,140,200,0.25);
  border-radius: 20px;
  font-size: .78rem; font-weight: 600;
  color: var(--blue1);
  background: rgba(0,140,200,0.05);
  transition: var(--trans);
}
.j-chip:hover { border-color: var(--blue2); color: var(--blue2); background: rgba(0,140,200,0.1); }

/* ═══════════════════════════════════════════════
   CONTACT  (light sky-blue bg)
   ═══════════════════════════════════════════════ */
.contact { background: var(--bg3); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: start; }
.contact-info .sec-title { margin-top: 10px; }
.contact-info > p { color: var(--text2); margin: 14px 0 26px; }
.contact-offices { display: flex; flex-direction: column; gap: 14px; margin-bottom: 26px; }
.c-office { display: flex; align-items: flex-start; gap: 14px; }
.c-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: rgba(0,140,210,0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--blue2); flex-shrink: 0;
}
.c-office strong { color: var(--text); display: block; margin-bottom: 2px; font-size: .92rem; }
.c-office span { color: var(--text3); font-size: .84rem; }
.contact-links { display: flex; flex-wrap: wrap; gap: 12px; }
.c-link {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  font-size: .84rem; font-weight: 600;
  color: var(--text2);
  background: var(--card);
  transition: var(--trans);
}
.c-link:hover { border-color: var(--blue2); color: var(--blue1); box-shadow: var(--shadow2); }
.contact-form {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius2);
  padding: 34px 30px;
  box-shadow: var(--shadow);
}
.form-group { margin-bottom: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group label {
  display: block; font-size: .78rem; font-weight: 600;
  color: var(--text2); letter-spacing: .5px; margin-bottom: 7px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(0,140,200,0.04);
  border: 1.5px solid rgba(0,140,200,0.18);
  border-radius: 10px;
  color: var(--text);
  font-size: .9rem; font-family: inherit;
  transition: var(--trans); outline: none; appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text3); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue2);
  background: rgba(0,140,200,0.06);
  box-shadow: 0 0 0 3px rgba(0,140,200,0.1);
}
.form-group select option { background: var(--bg2); color: var(--text); }
.form-note { text-align: center; font-size: .75rem; color: var(--text3); margin-top: 10px; }

/* ═══════════════════════════════════════════════
   FOOTER  (light blue bg)
   ═══════════════════════════════════════════════ */
.footer-top {
  background: #C8E8F8;
  border-top: 1.5px solid rgba(0,140,200,0.2);
  padding: 68px 0 44px;
}
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 48px; }
.f-brand { display: flex; flex-direction: column; gap: 14px; }
.f-logo { height: 48px; width: auto; border-radius: 8px; object-fit: contain; background: var(--white); padding: 4px; box-shadow: var(--shadow2); }
.f-name { font-family: 'Montserrat', 'Noto Sans SC', sans-serif; }
.f-name strong { font-size: .85rem; letter-spacing: 2px; color: var(--blue1); }
.f-name span { font-size: .8rem; color: var(--text2); display: block; margin-top: 4px; }
.f-desc { font-size: .82rem; color: var(--text2); line-height: 1.7; }
.f-col h5 {
  font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
  font-size: .72rem; font-weight: 700;
  letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--text3); margin-bottom: 14px;
}
.f-col ul { display: flex; flex-direction: column; gap: 10px; }
.f-col ul li a { font-size: .84rem; color: var(--text2); transition: var(--trans); }
.f-col ul li a:hover { color: var(--blue1); padding-left: 4px; }
.footer-bottom {
  background: #B4D8EE;
  padding: 18px 0;
  text-align: center;
  border-top: 1px solid rgba(0,140,200,0.15);
}
.footer-bottom p { font-size: .78rem; color: var(--text2); line-height: 1.8; }
.footer-bottom .disclaimer { font-size: .7rem; color: var(--text3); margin-top: 4px; }

/* ═══════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .about-grid     { grid-template-columns: 1fr; gap: 48px; }
  .about-visual   { flex-direction: row; flex-wrap: wrap; justify-content: center; }
  .product-layout { grid-template-columns: 1fr; gap: 48px; }
  .product-bottle-wrap { display: none; }
  .science-cards  { grid-template-columns: 1fr 1fr; }
  .benefits-grid  { grid-template-columns: 1fr 1fr; }
  .research-grid  { grid-template-columns: 1fr 1fr; }
  .footer-grid    { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .nav-menu {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.98);
    flex-direction: column; justify-content: center; align-items: center;
    gap: 22px;
    transform: translateX(100%);
    transition: transform .4s cubic-bezier(.4,0,.2,1);
    z-index: 999;
  }
  .nav-menu .nav-link { color: var(--text); font-size: 1.1rem; padding: 12px 24px; }
  .nav-menu.open { transform: translateX(0); }
  .hamburger { display: flex; z-index: 1001; }
  .hero-stats { flex-direction: column; padding: 20px; gap: 14px; }
  .h-divider  { width: 60%; height: 1px; }
  .science-cards { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .research-grid { grid-template-columns: 1fr; }
  .contact-grid  { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid   { grid-template-columns: 1fr; }
  .stats-row     { gap: 20px; }
  .st-item       { padding: 12px 24px; }
  .st-div        { display: none; }
  .form-row      { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 1.9rem; }
  .hero-cta   { flex-direction: column; align-items: center; }
  .btn        { width: 100%; justify-content: center; }
}