/* ========================================
   Polytrend New Material — International
   Brand Colors: Green #0F4C3A / #1D8C6E / #4A8C7A
   ======================================== */

:root {
  --color-primary: #0F4C3A;
  --color-primary-light: #1D8C6E;
  --color-accent: #4A8C7A;
  --color-blue: #1A5F9E;
  --color-blue-light: #3B82F6;
  --color-blue-bg: #EBF2FC;
  --color-bg-blue: #F0F5FC;
  --color-bg: #FFFFFF;
  --color-bg-light: #F5F7F5;
  --color-bg-cream: #FAFBFA;
  --color-bg-dark: #0A2E24;
  --color-text: #1A1A1A;
  --color-text-muted: #5C6B65;
  --color-text-light: #8A9A93;
  --color-border: #E2E7E4;
  --color-border-light: #EEF1EF;
  --color-white: #FFFFFF;
  
  --font-sans: "Helvetica Neue", Arial, "Hiragino Sans", "Microsoft YaHei", sans-serif;
  --container: 1160px;
  --radius: 6px;
  --radius-lg: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
}

h1 { font-size: 3rem; letter-spacing: -0.02em; }
h2 { font-size: 2.2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

p { color: var(--color-text-muted); }
a { color: var(--color-primary-light); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-primary); }

/* ========================================
   LAYOUT
   ======================================== */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary-light);
  margin-bottom: 12px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.section-subtitle {
  margin-top: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  text-transform: none;
}

/* Alternating backgrounds */
.section-alt {
  background: var(--color-bg-light);
}

.section-blue {
  background: var(--color-bg-blue);
}

.section-blue .section-label {
  color: var(--color-blue-light);
}

.section-dark {
  background: var(--color-bg-dark);
  color: var(--color-white);
}

.section-dark h2,
.section-dark h3,
.section-dark .section-label { color: var(--color-white); }
.section-dark p { color: rgba(255,255,255,0.75); }

/* ========================================
   NAVIGATION
   ======================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  transition: all 0.3s;
}

.nav.scrolled {
  box-shadow: 0 1px 20px rgba(0,0,0,0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-primary);
  letter-spacing: 0.03em;
}

.nav-logo svg { height: 36px; width: auto; }

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--color-primary); }

.nav-cta {
  background: var(--color-primary);
  color: var(--color-white) !important;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  transition: background 0.2s;
}

.nav-cta:hover { background: var(--color-primary-light); }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: 0.3s;
  border-radius: 2px;
}

/* ========================================
   HERO
   ======================================== */

.hero {
  min-height: 75vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, #0A2E24 0%, #0F4C3A 35%, #1D8C6E 60%, #1A5F9E 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.06) 0%, transparent 60%);
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 80px,
      rgba(255,255,255,0.015) 80px,
      rgba(255,255,255,0.015) 81px
    );
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  animation: float 20s infinite ease-in-out;
}

.hero-particle:nth-child(1) { width: 300px; height: 300px; top: -50px; right: -50px; animation-delay: 0s; }
.hero-particle:nth-child(2) { width: 200px; height: 200px; bottom: -30px; left: 10%; animation-delay: -7s; }
.hero-particle:nth-child(3) { width: 120px; height: 120px; top: 30%; left: 60%; animation-delay: -14s; }

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 10px) scale(0.95); }
}

/* --- Hero chemical elements --- */
.hero-chemicals {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

.hero-chemicals .chem {
  position: absolute;
  opacity: 0.65;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.25));
}

/* Erlenmeyer flask — bottom right */
.chem-flask {
  width: 140px;
  height: auto;
  bottom: 8%;
  right: 8%;
  animation: chem-float 18s ease-in-out infinite;
}

/* Molecular ring — top right */
.chem-ring {
  width: 160px;
  height: auto;
  top: 12%;
  right: 18%;
  animation: chem-float 22s ease-in-out infinite;
  animation-delay: -8s;
}

/* Bond structure — bottom left */
.chem-bond {
  width: 220px;
  height: auto;
  bottom: 18%;
  left: 3%;
  animation: chem-float 20s ease-in-out infinite;
  animation-delay: -4s;
}

/* Si-O-Si orbital — top left */
.chem-siosi {
  width: 130px;
  height: auto;
  top: 6%;
  left: 6%;
  animation: chem-float 24s ease-in-out infinite;
  animation-delay: -12s;
}

/* Test tube — bottom center */
.chem-tube {
  width: 70px;
  height: auto;
  bottom: 12%;
  left: 42%;
  animation: chem-float 19s ease-in-out infinite;
  animation-delay: -6s;
}

@keyframes chem-float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(8px, -12px) rotate(1deg); }
  50% { transform: translate(-6px, -4px) rotate(-0.5deg); }
  75% { transform: translate(4px, 8px) rotate(0.5deg); }
}

.hero .container {
  position: relative;
  z-index: 2;
  padding-top: 60px;
}

.hero-content {
  max-width: 680px;
}

/* Hero layout: product image left + text right (row-reverse keeps HTML order) */
.hero-layout {
  display: flex;
  flex-direction: row-reverse;
  align-items: stretch;
  gap: 56px;
}

/* Outer product column stretches to full text-column height; the visible
   card inside is absolutely positioned so its top aligns with the h1
   title's vertical middle and its bottom aligns with the primary
   button's vertical middle. */
.hero-product {
  position: relative;
  flex-shrink: 0;
  width: 340px;
  align-self: stretch;
}

/* Visible glass card — top at ~h1 middle (88px), bottom at ~button middle
   (15px from text-column bottom). Fine-tune these two values to shift. */
.hero-product-card {
  position: absolute;
  top: 88px;
  bottom: 15px;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  box-sizing: border-box;
  background: linear-gradient(160deg, rgba(255,255,255,0.10) 0%, rgba(255,255,255,0.04) 100%);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.10);
}

.hero-product-card img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  filter: drop-shadow(0 18px 36px rgba(0,0,0,0.45));
}

.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.9);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
  border: 1px solid rgba(255,255,255,0.15);
}

.hero h1 {
  color: var(--color-white);
  font-size: 2.8rem;
  line-height: 1.15;
  margin-bottom: 18px;
}

.hero h1 span {
  color: #5CD4A8;
}

.hero p {
  color: rgba(255,255,255,0.78);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--color-white);
  color: var(--color-primary);
}

.btn-primary:hover {
  background: #E8F5EF;
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.5);
}

/* ========================================
   ABOUT
   ======================================== */

.about-photo {
  position: relative;
  margin: 0 auto 48px;
  max-width: 960px;
  aspect-ratio: 16/7;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}

.about-photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

.about-text-centered {
  max-width: 700px;
  margin: 0 auto 20px;
  text-align: center;
}

.about-text-centered .lead {
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: 20px;
  font-weight: 500;
}

.about-text-centered p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 18px;
}

/* Three pillars */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}

.pillar {
  padding: 20px;
  border-left: 3px solid var(--color-primary-light);
  background: var(--color-bg-cream);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.pillar h4 {
  font-size: 0.95rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.pillar p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ========================================
   ABOUT PAGE — Company & Culture
   ======================================== */

.nav-links a.active { color: var(--color-primary); }

/* Page hero (centered, distinct from homepage product hero) */
.page-hero {
  position: relative;
  padding: 140px 0 90px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  text-align: center;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  right: -80px; bottom: -80px;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: rgba(92,212,168,0.12);
}
.page-hero::before {
  content: "";
  position: absolute;
  left: -60px; top: -60px;
  width: 240px; height: 240px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero-label {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(255,255,255,0.15);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 22px;
}
.page-hero h1 {
  color: #fff;
  font-size: 3.1rem;
  margin-bottom: 18px;
}
.page-hero .page-hero-tag {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.92);
  font-weight: 500;
  max-width: 760px;
  margin: 0 auto 14px;
}
.page-hero p.page-hero-sub {
  color: rgba(255,255,255,0.78);
  max-width: 680px;
  margin: 0 auto;
  font-size: 1rem;
}

/* Purpose — four themes */
.purpose-lead {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--color-text);
  font-weight: 500;
}
.purpose-lead .em {
  color: var(--color-primary);
  font-weight: 700;
}
.theme-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 44px;
}
.theme-card {
  position: relative;
  padding: 30px 28px 28px 30px;
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px rgba(15,76,58,0.05);
  overflow: hidden;
}
.theme-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--color-primary-light);
}
.theme-num {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.16;
  margin-bottom: 6px;
}
.theme-card h3 {
  color: var(--color-primary);
  margin-bottom: 10px;
  font-size: 1.2rem;
}
.theme-tag {
  display: block;
  font-style: italic;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 12px;
  font-size: 0.95rem;
  line-height: 1.5;
}
.theme-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* Culture values */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 44px;
}
.culture-card {
  padding: 26px 24px;
  background: var(--color-bg-cream);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-align: left;
}
.culture-icon {
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px;
  background: rgba(29,140,110,0.12);
  color: var(--color-primary-light);
  margin-bottom: 14px;
}
.culture-card h4 {
  color: var(--color-primary);
  margin-bottom: 6px;
  font-size: 1.02rem;
}
.culture-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* About page responsive */
@media (max-width: 768px) {
  .page-hero { padding: 110px 0 60px; }
  .page-hero h1 { font-size: 2.1rem; }
  .theme-grid { grid-template-columns: 1fr; }
  .culture-grid { grid-template-columns: 1fr; }
}

/* ========================================
   FEATURED PRODUCT — Focus Areas
   ======================================== */

/* ---- Focus Showcase: left nav + center content + right image ---- */
.focus-showcase {
  display: grid;
  grid-template-columns: 260px 1fr 280px;
  gap: 0;
  margin-bottom: 60px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  min-height: 420px;
}

/* --- Left nav --- */
.focus-nav {
  background: var(--color-bg-light);
  padding: 24px 0;
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* Carousel arrows — hidden on desktop, visible on narrow */
.focus-nav-arrow { display: none; }

.focus-nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 24px;
  border: none;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
  position: relative;
  width: 100%;
}

.focus-nav-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: transparent;
  border-radius: 0 3px 3px 0;
  transition: background 0.2s;
}

.focus-nav-item:hover {
  background: rgba(15, 76, 58, 0.05);
}

.focus-nav-item.active {
  background: var(--color-white);
}

.focus-nav-item.active::before {
  background: var(--color-primary-light);
}

.focus-nav-num {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-light);
  letter-spacing: 0.04em;
  min-width: 22px;
  transition: color 0.2s;
}

.focus-nav-item.active .focus-nav-num {
  color: var(--color-primary-light);
}

.focus-nav-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.focus-nav-text strong {
  font-size: 0.9rem;
  color: var(--color-text);
  transition: color 0.2s;
}

.focus-nav-item.active .focus-nav-text strong {
  color: var(--color-primary);
}

.focus-nav-text small {
  font-size: 0.72rem;
  color: var(--color-text-light);
  line-height: 1.3;
}

/* --- Center content --- */
.focus-content {
  padding: 40px 36px;
  overflow-y: auto;
  position: relative;
}

.focus-panel {
  animation: focusFadeIn 0.3s ease;
}

@keyframes focusFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.focus-panel-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  margin-bottom: 18px;
}

.focus-panel h3 {
  font-size: 1.3rem;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.focus-panel .focus-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  line-height: 1.5;
}

.focus-panel .focus-list {
  list-style: none;
  display: grid;
  gap: 10px;
}

.focus-panel .focus-list li {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  padding-left: 18px;
  position: relative;
}

.focus-panel .focus-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary-light);
}

.focus-panel .focus-list li strong {
  color: var(--color-text);
}

.focus-panel .focus-vs {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-light);
  display: grid;
  gap: 4px;
}

.focus-panel .focus-vs .vs-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.focus-panel .focus-vs .vs-check {
  font-size: 0.8rem;
  color: var(--color-primary-light);
  font-weight: 600;
}

.focus-panel .focus-vs .vs-cross {
  font-size: 0.8rem;
  color: #CC5555;
  font-weight: 600;
}

.focus-panel .focus-substrates {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.focus-panel .focus-substrates span {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-primary);
  background: #EEF5F1;
  padding: 4px 12px;
  border-radius: 12px;
}

/* ---- TDS Info Panel ---- */
.tds-info-box {
  background: var(--color-bg-light);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 20px 0;
  display: grid;
  gap: 10px;
}

.tds-info-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
}

.tds-info-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.tds-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.tds-value {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary);
  text-align: right;
}

.tds-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--color-primary);
  color: #fff;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
  margin-top: 4px;
}

.tds-download-btn:hover {
  background: var(--color-primary-light);
  color: #fff;
  transform: translateY(-1px);
}

/* Download row: side-by-side TDS + SGS */
.download-row {
  display: flex;
  gap: 12px;
  margin-top: 4px;
  flex-wrap: wrap;
}

.sgs-toggle-btn {
  border: 1px solid var(--color-primary);
  background: transparent !important;
  color: var(--color-primary) !important;
  cursor: pointer;
}

.sgs-toggle-btn:hover {
  background: rgba(29,158,117,0.08) !important;
  color: var(--color-primary-light) !important;
}

.sgs-arrow {
  transition: transform 0.25s ease;
  margin-left: 2px;
}

.sgs-toggle-btn[aria-expanded="true"] .sgs-arrow {
  transform: rotate(180deg);
}

/* SGS dropdown */
.sgs-dropdown {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, margin 0.35s ease;
  margin-top: 0;
  border-radius: var(--radius-lg);
  background: #F7F9F8;
  border: 1px solid transparent;
}

.sgs-dropdown.open {
  max-height: 300px;
  margin-top: 12px;
  border-color: var(--color-border-light);
}

.sgs-dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  text-decoration: none;
  color: var(--color-text);
  transition: background 0.15s;
  border-bottom: 1px solid var(--color-border-light);
}

.sgs-dropdown-item:last-child {
  border-bottom: none;
}

.sgs-dropdown-item:hover {
  background: #EEF3F0;
}

.sgs-dropdown-item svg {
  flex-shrink: 0;
  color: var(--color-primary);
}

.sgs-dropdown-item div {
  flex: 1;
}

.sgs-dropdown-item strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.sgs-dropdown-item small {
  display: block;
  font-size: 0.72rem;
  color: var(--color-text-light);
  margin-top: 2px;
}

.sgs-dl-icon {
  font-size: 1.1rem;
  color: var(--color-primary);
  flex-shrink: 0;
}

.tds-note {
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin-top: 14px;
  line-height: 1.5;
}

/* Inline comparison table inside focus panel */
.focus-panel-table {
  padding: 0;
}

.comparison-table-inline {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  font-size: 0.82rem;
}

.comparison-table-inline th,
.comparison-table-inline td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.comparison-table-inline thead th {
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.comparison-table-inline thead th:first-child { background: #0A2E24; }

.comparison-table-inline tbody td {
  background: var(--color-white);
  color: var(--color-text-muted);
}

.comparison-table-inline tbody tr.highlight td {
  background: #F5FAF8;
}

.comparison-table-inline .check-mark { color: var(--color-primary-light); font-weight: 700; }
.comparison-table-inline .cross-mark { color: #CC5555; }

/* --- Right image --- */
.focus-image {
  background: var(--color-bg-light);
  border-left: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
}

.focus-image-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--color-text-light);
  text-align: center;
  width: 100%;
  height: 100%;
}

.focus-image-inner svg {
  opacity: 0.5;
}

.focus-image-inner .focus-panel-svg {
  opacity: 1;
  width: 100%;
  max-width: 360px;
  height: auto;
}

/* Diagram SVGs — fill the full panel without max-width cap */
.focus-image-inner .focus-panel-svg.focus-diagram {
  max-width: none;
  width: 100%;
  height: auto;
  max-height: 100%;
}

.focus-image-inner p {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.08em;
}

.focus-image-inner span {
  font-size: 0.72rem;
  color: var(--color-text-light);
}

.focus-panel-image {
  display: block;
  max-width: 100%;
  max-height: 100%;
  border-radius: var(--radius);
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}

.focus-panel-image.focus-panel-product {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  object-position: center;
  border-radius: 0;
  box-shadow: none;
}

.focus-image.has-product-image {
  padding: 10px;
  background: transparent;
  border-left: none;
}

.focus-panel-svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 360px;
  margin: 0 auto;
}

.focus-panel-icon-vs {
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
}

/* ========================================
   TECHNOLOGY & R&D
   ======================================== */

.tech-carousel {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
}

.tech-track {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.tech-track-inner {
  display: flex;
  transition: transform 0.4s ease;
}

.tech-slide {
  flex: 0 0 100%;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  gap: 0;
  overflow: hidden;
}

.tech-slide-img {
  flex: 0 0 300px;
  background: linear-gradient(135deg, #F0F5FC 0%, #E8F0F8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  border-right: 1px solid var(--color-border-light);
}

.tech-slide-img svg {
  width: 100%;
  height: auto;
  max-height: 200px;
}

.tech-slide-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tech-slide-body {
  flex: 1;
  padding: 48px 56px;
  min-width: 0;
}

.tech-slide-body h3 {
  color: var(--color-blue);
  margin-bottom: 12px;
}

.tech-slide-body .tech-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--color-blue-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-blue);
}

.tech-slide-body ul {
  list-style: none;
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.tech-slide-body ul li {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding-left: 16px;
  position: relative;
}

.tech-slide-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-blue-light);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.carousel-btn:hover {
  background: var(--color-blue);
  color: var(--color-white);
  border-color: var(--color-blue);
}

.carousel-prev { left: -22px; }
.carousel-next { right: -22px; }

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
}

.carousel-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  padding: 0;
}

.carousel-dots .dot.active {
  background: var(--color-blue);
  width: 28px;
  border-radius: 5px;
}

/* ========================================
   COOPERATION PROCESS
   ======================================== */

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(10% - 28px);
  right: calc(10% - 28px);
  height: 1.5px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  opacity: 0.35;
}

.process-step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-white);
  border: 2px solid var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
  position: relative;
  z-index: 1;
}

.process-step h4 {
  font-size: 0.95rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.process-step p {
  font-size: 0.8rem;
}

.process-step:nth-child(even) .step-number {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: var(--color-white);
}

.process-step:nth-child(even) h4 {
  color: var(--color-primary-light);
}

/* ========================================
   TIMELINE
   ======================================== */

/* ========================================
   OUR JOURNEY — Molecular structure lines
   ======================================== */
#history {
  position: relative;
  overflow: hidden;
}

/* Repeating molecular-network pattern */
#history::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.20;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200' viewBox='0 0 200 200'%3E%3Cdefs%3E%3ClinearGradient id='g' x1='0%25' y1='0%25' x2='100%25' y2='100%25'%3E%3Cstop offset='0%25' stop-color='%235CD4A8'/%3E%3Cstop offset='100%25' stop-color='%231D8C6E'/%3E%3C/linearGradient%3E%3C/defs%3E%3Cg fill='none' stroke='url(%23g)' stroke-width='0.6' opacity='0.6'%3E%3C!-- hex ring top-left --%3E%3Cpolygon points='50,20 90,43 90,89 50,112 10,89 10,43'/%3E%3C!-- connecting bonds --%3E%3Cline x1='90' y1='43' x2='130' y2='20'/%3E%3Cline x1='90' y1='89' x2='140' y2='120'/%3E%3Cline x1='50' y1='112' x2='50' y2='148'/%3E%3Cline x1='10' y1='89' x2='-20' y2='120'/%3E%3C!-- hex ring bottom-right --%3E%3Cpolygon points='140,60 170,78 170,114 140,132 110,114 110,78'/%3E%3C!-- extending bond --%3E%3Cline x1='170' y1='78' x2='210' y2='50'/%3E%3Cline x1='170' y1='114' x2='210' y2='140'/%3E%3C!-- isolated nodes (atoms) --%3E%3Ccircle cx='50' cy='20' r='2' fill='%235CD4A8'/%3E%3Ccircle cx='90' cy='43' r='2' fill='%235CD4A8'/%3E%3Ccircle cx='90' cy='89' r='2' fill='%231D8C6E'/%3E%3Ccircle cx='50' cy='112' r='2' fill='%231D8C6E'/%3E%3Ccircle cx='10' cy='43' r='2' fill='%235CD4A8'/%3E%3Ccircle cx='10' cy='89' r='2' fill='%231D8C6E'/%3E%3Ccircle cx='50' cy='148' r='2' fill='%231D8C6E'/%3E%3Ccircle cx='140' cy='60' r='2' fill='%235CD4A8'/%3E%3Ccircle cx='170' cy='78' r='2' fill='%235CD4A8'/%3E%3Ccircle cx='170' cy='114' r='2' fill='%231D8C6E'/%3E%3Ccircle cx='140' cy='132' r='2' fill='%235CD4A8'/%3E%3Ccircle cx='110' cy='78' r='2' fill='%231D8C6E'/%3E%3Ccircle cx='110' cy='114' r='2' fill='%235CD4A8'/%3E%3Ccircle cx='130' cy='20' r='2' fill='%235CD4A8'/%3E%3Ccircle cx='140' cy='120' r='2' fill='%231D8C6E'/%3E%3C/g%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 200px;
}

/* Ensure content layers above the background effects */
#history .container {
  position: relative;
  z-index: 1;
}

/* ========================================
   TIMELINE
   ======================================== */

.timeline {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(to bottom, 
    transparent,
    rgba(255,255,255,0.15) 5%,
    rgba(255,255,255,0.25) 50%,
    rgba(255,255,255,0.15) 95%,
    transparent
  );
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  margin-bottom: 6px;
  position: relative;
}

/* — Connector line: dot → card edge — */
.timeline-item::after {
  content: '';
  position: absolute;
  top: 19px;
  height: 1px;
  background: rgba(92,212,168,0.4);
  z-index: 0;
}

/* Odd: content on left → line from content right edge to center dot */
.timeline-item:nth-child(odd)::after {
  left: 44%;
  width: 6%;
}

/* Even: spacer on left → line from center dot to content left edge */
.timeline-item:nth-child(even)::after {
  left: 50%;
  width: 6%;
}

.timeline-content {
  width: 44%;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 16px 20px;
  transition: all 0.25s ease;
  position: relative;
  z-index: 1;
  cursor: pointer;
}

.timeline-content:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.16);
  transform: translateY(-2px);
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 14px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #5CD4A8;
  box-shadow: 0 0 10px rgba(92,212,168,0.5);
  border: 2px solid var(--color-bg-dark);
  transform: translateX(-50%);
  z-index: 2;
  transition: box-shadow 0.25s ease;
}

.timeline-item:hover .timeline-dot {
  box-shadow: 0 0 18px rgba(92,212,168,0.8);
}

.timeline .spacer {
  width: 56%;
}

.timeline-year {
  font-size: 0.68rem;
  font-weight: 700;
  color: #5CD4A8;
  letter-spacing: 0.1em;
  margin-bottom: 3px;
  text-transform: uppercase;
}

.timeline-content h4 {
  color: var(--color-white);
  font-size: 0.88rem;
  font-weight: 600;
  margin: 0;
}

.timeline-content p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.3s ease, margin-top 0.3s ease;
}

.timeline-content:hover p {
  max-height: 200px;
  opacity: 1;
  margin-top: 8px;
}

@media (max-width: 768px) {
  /* Vertical line anchors to left */
  .timeline::before { left: 24px; }

  /* Hide all spacers */
  .timeline .spacer { display: none; }

  /* Uniform layout: push content to the right of dot+line */
  .timeline-item {
    padding-left: 56px;
    min-height: 36px;
  }

  /* Dot sits on the vertical line */
  .timeline-dot {
    left: 24px;
    top: 14px;
  }

  /* Content fills available width */
  .timeline-content {
    width: 100%;
  }

  /* Horizontal connector line — from dot (24px) to content edge (56px) */
  .timeline-item::after,
  .timeline-item:nth-child(odd)::after,
  .timeline-item:nth-child(even)::after {
    left: 24px;
    width: 32px;
    top: 19px;
  }

  /* Descriptions hidden by default (same as desktop) */
  .timeline-content p {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
  }

  /* Expanded via tap (JS toggles .expanded class) */
  .timeline-content.expanded p {
    max-height: 200px;
    opacity: 1;
    margin-top: 8px;
  }
}

@media (max-width: 640px) {
  .timeline { max-width: 100%; }
  .timeline-content { padding: 14px; }
}

/* ========================================
   CONTACT
   ======================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h3 {
  color: var(--color-text);
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.contact-details {
  list-style: none;
  display: grid;
  gap: 16px;
  margin-bottom: 32px;
}

.contact-details li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  font-size: 0.9rem;
}

.contact-details .contact-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-white);
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 0.85rem;
  font-weight: 600;
  transition: background 0.2s, transform 0.2s;
}

.social-link:hover {
  background: var(--color-primary-light);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* Contact form */
.contact-form {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  transition: border-color 0.2s;
  background: var(--color-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-blue-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.btn-submit {
  width: 100%;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 14px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background 0.2s;
}

.btn-submit:hover { background: var(--color-primary-light); }

/* Anti-spam: honeypot trap (hidden off-screen, bots still fill it) */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Anti-spam: visual captcha */
.captcha-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.captcha-input {
  flex: 1 1 auto;
  min-width: 0;
  width: auto;
  text-transform: uppercase;
  letter-spacing: 4px;
  font-weight: 600;
}

.captcha-canvas {
  flex: 0 0 auto;
  display: block;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #f3f7f5;
  cursor: pointer;
}

.captcha-refresh {
  flex: 0 0 auto;
  width: 40px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
  color: var(--color-primary);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.captcha-refresh:hover {
  background: #f3f7f5;
  border-color: var(--color-primary);
}

.captcha-hint {
  display: block;
  margin-top: 6px;
  font-size: 0.78rem;
  color: #6b7280;
}

@media (max-width: 480px) {
  .captcha-row { flex-wrap: wrap; }
  .captcha-input { flex: 1 1 100%; }
  .captcha-canvas { flex: 0 0 auto; }
  .captcha-refresh { height: 46px; }
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  background: #071E17;
  color: rgba(255,255,255,0.6);
  padding: 48px 0;
  font-size: 0.85rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand p {
  color: rgba(255,255,255,0.5);
  margin-top: 12px;
  max-width: 320px;
}

.footer-links h4 {
  color: var(--color-white);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.footer-links ul {
  list-style: none;
  display: grid;
  gap: 8px;
}

.footer-links a {
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
}

.footer-links a:hover { color: var(--color-white); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: rgba(255,255,255,0.4);
  font-size: 0.8rem;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 960px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.7rem; }
  
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .hero-layout { flex-direction: column; align-items: flex-start; }
  .hero-product { display: none; }
  
  .focus-showcase { grid-template-columns: 1fr; }
  .focus-nav { flex-direction: row; padding: 0; gap: 0; border-right: none; border-bottom: 1px solid var(--color-border-light); position: relative; }
  .focus-nav-track { display: flex; flex-direction: row; overflow-x: auto; overflow-y: hidden; padding: 8px 36px; gap: 0; scroll-behavior: smooth; }
  .focus-nav-track::-webkit-scrollbar { display: none; }
  .focus-nav-track { scrollbar-width: none; }
  .focus-nav-item { flex: 0 0 calc(100% / 3); min-width: 0; padding: 8px 4px; white-space: normal; flex-shrink: 0; }
  .focus-nav-item .focus-nav-text { display: flex; flex-direction: column; align-items: center; text-align: center; }
  .focus-nav-item .focus-nav-text small { display: none; }
  .focus-nav-item .focus-nav-text strong { font-size: 0.7rem; line-height: 1.15; white-space: normal; }
  .focus-nav-num { font-size: 0.7rem; }
  .focus-nav-item::before { top: auto; bottom: 0; left: 4px; right: 4px; width: auto; height: 1px; border-radius: 0; }
  .focus-nav-arrow { display: flex; align-items: center; justify-content: center; position: absolute; top: 0; bottom: 0; width: 36px; border: none; background: var(--color-bg-light); color: var(--color-text-muted); font-size: 1.4rem; cursor: pointer; z-index: 2; transition: color 0.2s; }
  .focus-nav-arrow:hover { color: var(--color-primary); }
  .focus-nav-prev { left: 0; }
  .focus-nav-next { right: 0; }
  .focus-image { border-left: none; border-top: 1px solid var(--color-border-light); }
  .focus-image.has-product-image { border-top: none; display: flex; align-items: center; justify-content: center; }
  .focus-panel-image { max-width: 260px; max-height: 320px; }
  .focus-panel-image.focus-panel-product { width: auto; height: auto; max-width: 260px; max-height: 320px; }
  .tech-slide-img img { max-width: 260px; max-height: 320px; object-fit: contain; }
  .focus-panel-svg { max-width: 210px; max-height: 210px; margin: 0 auto; }
  .focus-image-inner .focus-panel-svg.focus-diagram { max-width: 210px; max-height: 210px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  
  .process-steps { grid-template-columns: 1fr; gap: 24px; }
  .process-steps::before { display: none; }
  .process-step { display: flex; align-items: center; gap: 16px; text-align: left; }
  .step-number { margin: 0; }
  
  .about-photo { margin-bottom: 32px; border-radius: var(--radius); aspect-ratio: 16/9; }
  .about-text-centered { max-width: 100%; text-align: left; }
  
  .pillars { grid-template-columns: 1fr; }
  
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  }
  .nav-toggle { display: block; }
  
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 60px 0; }
  .app-grid { grid-template-columns: 1fr; }
  .focus-panel-image { max-width: 200px; max-height: 260px; }
  .focus-panel-image.focus-panel-product { max-width: 200px; max-height: 260px; }
  .tech-slide-img img { max-width: 200px; max-height: 260px; object-fit: contain; }
  .focus-panel-svg { max-width: 168px; max-height: 168px; }
  .focus-image-inner .focus-panel-svg.focus-diagram { max-width: 168px; max-height: 168px; }
  .focus-panel { padding: 0; }
  .hero { min-height: auto; padding: 80px 0 60px; }
  .chem-flask { width: 90px; bottom: 4%; right: 4%; }
  .chem-ring { width: 100px; top: 6%; right: 8%; }
  .chem-bond { width: 150px; bottom: 10%; }
  .chem-siosi { width: 80px; top: 3%; left: 3%; }
  .chem-tube { width: 50px; bottom: 8%; left: 35%; }
  .tech-slide { flex-direction: column; }
  .tech-slide-img { flex: 0 0 120px; border-right: none; border-bottom: 1px solid var(--color-border-light); }
  .tech-slide-body { padding: 32px 24px; }
  .carousel-prev { left: -8px; }
  .carousel-next { right: -8px; }
}

/* ========================================
   FLOATING SIDEBAR
   ======================================== */
.float-sidebar {
  position: fixed;
  right: 24px;
  bottom: 80px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* — Shared button — */
.float-btn {
  width: 50px;
  height: 50px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0A2E24;
  color: #5CD4A8;
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
  transition: background 0.2s, color 0.2s, transform 0.2s;
  padding: 0;
}

.float-btn:hover {
  background: #1D9E75;
  color: #fff;
  transform: scale(1.05);
}

/* — Each item group — */
.float-item {
  position: relative;
}

/* — Popup (phone / wechat) — */
.float-popup {
  position: absolute;
  right: 62px;
  top: 50%;
  transform: translateY(-50%);
  background: #fff;
  border-radius: 12px;
  padding: 16px 18px;
  white-space: nowrap;
  box-shadow: 0 8px 32px rgba(0,0,0,0.14);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  pointer-events: none;
}

/* Arrow pointing right */
.float-popup::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 10px;
  height: 10px;
  background: #fff;
  border-radius: 2px;
}

.float-item:hover .float-popup {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.float-popup-label {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.float-popup-value {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.15s;
  letter-spacing: 0.3px;
}

.float-popup-value:hover {
  color: var(--color-primary);
}

.float-popup-sub {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-light);
  margin-top: 2px;
}

/* — WeChat QR — */
.float-wechat-popup {
  padding: 14px 14px 10px 14px;
}

.float-qr-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.float-qr-box {
  width: 120px;
  height: 120px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-border-light);
}

.float-qr-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #fff;
}

/* — Back to top visibility — */
.float-btn-top {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s, background 0.2s, color 0.2s, transform 0.2s;
}

.float-btn-top.visible {
  opacity: 1;
  visibility: visible;
}

/* — Mobile: tap to open, hide hover — */
@media (max-width: 768px) {
  .float-sidebar {
    right: 12px;
    bottom: 24px;
    gap: 6px;
  }
  /* Disable hover expansion, use JS tap instead */
  .float-item:hover .float-popup { opacity: 0; visibility: hidden; pointer-events: none; }
  .float-item.open .float-popup { opacity: 1; visibility: visible; pointer-events: auto; }

  /* Keep popup inside viewport — align bottom to button bottom, expand upward */
  .float-popup {
    top: auto;
    bottom: 0;
    transform: none;
  }
  .float-popup::after {
    top: auto;
    bottom: 20px;
    transform: rotate(45deg);
  }
}