/* =============================================
   JSH filterwater — Main Stylesheet
   Clean, modern, professional design
   ============================================= */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1a2433;
  background: #fff;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- CSS Variables --- */
:root {
  /* Primary: 深海军蓝 */
  --blue:        #0d3b6e;
  --blue-dark:   #082a52;
  --blue-light:  #1a5496;
  /* Accent: 金色 / 琥珀 */
  --cyan:        #c8960a;
  --cyan-light:  #f5d06a;
  /* Logo Green (用于 hover/accent 点缀) */
  --green:       #2e9e4f;
  --green-light: #4dc97a;
  /* Neutrals */
  --white:       #ffffff;
  --gray-50:     #f5f7fa;
  --gray-100:    #eaecf0;
  --gray-200:    #d1d8e4;
  --gray-400:    #8a97b0;
  --gray-600:    #4a5568;
  --gray-700:    #2d3748;
  --gray-900:    #0d1b2e;
  --radius:      10px;
  --shadow:      0 4px 24px rgba(13,59,110,.10);
  --shadow-lg:   0 12px 40px rgba(13,59,110,.18);
  --transition:  .22s ease;
  --container:   1200px;
}

/* --- Layout --- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-light { background: var(--gray-50); }
.section-blue { background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 60%, var(--blue-light) 100%); color: #fff; }

/* --- Typography --- */
h1,h2,h3,h4,h5 { line-height: 1.25; font-weight: 700; color: var(--gray-900); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.4rem); }
p { color: var(--gray-600); }

/* --- Section Header --- */
.section-header { text-align: center; max-width: 720px; margin: 0 auto 3rem; }
.section-header h2 { margin-bottom: .75rem; }
.section-header p { font-size: 1.1rem; }
.section-header.light h2,
.section-header.light p { color: rgba(255,255,255,.95); }

.section-badge {
  display: inline-block;
  background: rgba(13,59,110,.08);
  color: var(--blue);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .3rem .9rem;
  border-radius: 100px;
  margin-bottom: .9rem;
}
.section-badge-light {
  display: inline-block;
  background: rgba(255,255,255,.2);
  color: #fff;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .3rem .9rem;
  border-radius: 100px;
  margin-bottom: .9rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .65rem 1.6rem;
  border-radius: var(--radius);
  font-size: .95rem; font-weight: 600;
  cursor: pointer; border: 2px solid transparent;
  transition: all var(--transition);
  text-decoration: none !important;
  white-space: nowrap;
}
.btn-lg { padding: .85rem 2.2rem; font-size: 1.05rem; }
.btn-block { width: 100%; }
.btn-primary { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn-primary:hover { background: var(--blue-dark); border-color: var(--blue-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(13,59,110,.3); }
.btn-secondary { background: transparent; color: var(--blue); border-color: var(--blue); }
.btn-secondary:hover { background: var(--blue); color: #fff; }
.btn-white { background: #fff; color: var(--blue); border-color: #fff; }
.btn-white:hover { background: var(--gray-100); transform: translateY(-2px); }
.btn-outline-white { background: transparent; color: #fff; border-color: rgba(255,255,255,.7); }
.btn-outline-white:hover { background: rgba(255,255,255,.15); border-color: #fff; }
.btn-whatsapp { background: #25d366; color: #fff; border-color: #25d366; margin-top: .5rem; }
.btn-whatsapp:hover { background: #1ebe5d; }

/* ===================== HEADER ===================== */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: 0 2px 16px rgba(13,59,110,.08);
  transition: all var(--transition);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
/* Logo 自适应：限制高度，不超出 header */
.logo {
  display: flex;
  align-items: center;
  height: 68px;
  overflow: hidden;
  padding: 8px 0;
}
.logo img {
  height: 100%;
  max-height: 52px;
  width: auto;
  object-fit: contain;
  display: block;
}
.logo:hover { text-decoration: none; }
.main-nav ul { display: flex; list-style: none; gap: .25rem; }
.main-nav a {
  display: block; padding: .5rem 1rem;
  color: var(--gray-700); font-weight: 500; font-size: .95rem;
  border-radius: 8px;
  transition: all var(--transition);
}
.main-nav a:hover { background: var(--gray-100); color: var(--blue); text-decoration: none; }
.nav-cta { background: var(--blue) !important; color: #fff !important; padding: .5rem 1.2rem !important; }
.nav-cta:hover { background: var(--blue-dark) !important; }
.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  background: none; border: none; cursor: pointer; padding: .4rem; width: 40px; height: 40px;
}
.nav-toggle span { display: block; height: 2px; background: var(--gray-700); border-radius: 2px; transition: all var(--transition); }

/* ===================== HERO ===================== */
.hero {
  position: relative; min-height: 92vh;
  background: linear-gradient(135deg, #061828 0%, var(--blue-dark) 30%, var(--blue) 65%, #1a5496 100%);
  background-size: cover; background-position: center;
  display: flex; align-items: center; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(6,24,40,.45) 0%, rgba(13,59,110,.25) 70%, rgba(26,84,150,.15) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  color: #fff; padding: 100px 24px 80px;
  max-width: var(--container);
}
.hero-badge {
  display: inline-block;
  background: rgba(200,150,10,.25); backdrop-filter: blur(8px);
  color: var(--cyan-light); font-size: .8rem; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  padding: .35rem 1rem; border-radius: 100px; border: 1px solid rgba(200,150,10,.4);
  margin-bottom: 1.5rem;
}
.hero-content h1 { font-size: clamp(2.2rem, 6vw, 4rem); color: #fff; margin-bottom: 1.25rem; max-width: 800px; }
.hero-content > p { font-size: clamp(1rem, 2.5vw, 1.25rem); color: rgba(255,255,255,.88); max-width: 600px; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3.5rem; }
.hero-stats {
  display: flex; gap: 2.5rem; flex-wrap: wrap;
  padding-top: 2rem; border-top: 1px solid rgba(255,255,255,.15);
}
.hero-stats .stat { text-align: center; }
.hero-stats .stat strong { display: block; font-size: 2rem; font-weight: 800; color: var(--cyan-light); }
.hero-stats .stat span { font-size: .85rem; color: rgba(255,255,255,.75); }
.hero-scroll-hint {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,.6);
  animation: bounce 2s infinite;
}
@keyframes bounce { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }

/* ===================== FEATURES GRID ===================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 2rem;
  transition: all var(--transition);
}
.feature-card:hover { border-color: var(--blue); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.feature-icon { color: var(--blue); margin-bottom: 1rem; }
.feature-icon-emoji { font-size: 2rem; margin-bottom: .75rem; }
.feature-card h3 { margin-bottom: .5rem; font-size: 1.1rem; }
.feature-card p { font-size: .92rem; }

/* ===================== PRODUCTS GRID ===================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}
.product-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: all var(--transition);
  box-shadow: var(--shadow);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--cyan); }
.product-icon {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-light) 100%);
  padding: 2.5rem 2rem;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}
.product-body { padding: 2rem; display: flex; flex-direction: column; flex: 1; }
.product-body h3 { margin-bottom: .75rem; font-size: 1.35rem; }
.product-body p { flex: 1; margin-bottom: 1.5rem; font-size: .95rem; }

/* Products detail page */
.products-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
}
.product-detail-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 2rem;
  transition: all var(--transition);
}
.product-detail-card:hover { border-color: var(--blue); box-shadow: var(--shadow); }
.pdc-header { display: flex; align-items: flex-start; gap: 1rem; margin-bottom: 1.5rem; }
.pdc-emoji { font-size: 3rem; line-height: 1; }
.pdc-header h2 { font-size: 1.4rem; margin-bottom: .5rem; }
.pdc-header p { font-size: .95rem; }

/* ===================== Product Images ===================== */
.product-cover-image {
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 1.5rem;
  background: #f8f9fa;
  border: 1px solid var(--gray-200);
}
.product-cover-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
}
.product-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}
.gallery-item {
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color var(--transition), transform var(--transition);
  background: #f8f9fa;
  aspect-ratio: 4/3;
}
.gallery-item:hover {
  border-color: var(--blue);
  transform: scale(1.02);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.9);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 8px;
  cursor: default;
}
.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  color: #fff;
  font-size: 3rem;
  cursor: pointer;
  line-height: 1;
  transition: opacity var(--transition);
}
.lightbox-close:hover { opacity: .7; }

/* ===================== Product Card Image ===================== */
.pdc-image {
  margin: -2rem -2rem 1.5rem;
  background: linear-gradient(135deg, var(--blue-light), var(--blue));
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 180px;
  overflow: hidden;
}
.pdc-image img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.pdc-image .pdc-emoji {
  color: rgba(255,255,255,.8);
  font-size: 4rem;
}

/* ===================== APPLICATIONS ===================== */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
}
.app-item {
  display: flex; flex-direction: column; align-items: center; gap: .75rem;
  padding: 1.75rem 1rem;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 16px;
  text-align: center; color: #fff;
  transition: all var(--transition);
}
.app-item:hover { background: rgba(255,255,255,.2); transform: translateY(-4px); }
.app-item span { font-weight: 600; font-size: .95rem; }

/* ===================== FAQ ===================== */
.faq-list { max-width: 840px; margin: 0 auto; }
.faq-container { max-width: 840px; }
.faq-item {
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  margin-bottom: .75rem;
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item[open] { box-shadow: var(--shadow); border-color: var(--blue); }
.faq-item summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: 600; font-size: .98rem; color: var(--gray-900);
  display: flex; align-items: center; justify-content: space-between;
  list-style: none; user-select: none;
  transition: background var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.4rem; font-weight: 300; color: var(--blue);
  transition: transform var(--transition);
  flex-shrink: 0; margin-left: 1rem;
}
.faq-item[open] summary::after { content: '−'; }
.faq-item[open] summary { background: var(--gray-50); }
.faq-answer {
  padding: 0 1.5rem 1.5rem;
  color: var(--gray-600); font-size: .95rem; line-height: 1.8;
}
.faq-cta {
  margin-top: 3rem;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
}
.faq-cta h3 { margin-bottom: .5rem; }
.faq-cta p { margin-bottom: 1.5rem; }

/* ===================== CTA ===================== */
.cta-section { padding: 60px 0; }
.cta-box {
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 60%, var(--blue-light) 100%);
  border-radius: 24px;
  padding: 4rem 3rem;
  text-align: center; color: #fff;
}
.cta-box h2 { color: #fff; font-size: clamp(1.5rem, 4vw, 2.2rem); margin-bottom: 1rem; }
.cta-box p { color: rgba(255,255,255,.88); font-size: 1.1rem; max-width: 560px; margin: 0 auto 2rem; }
.cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ===================== PAGE BANNER ===================== */
.page-banner {
  position: relative;
  background: linear-gradient(135deg, #061828 0%, var(--blue-dark) 40%, var(--blue) 100%);
  background-size: cover; background-position: center;
  padding: 100px 0 80px;
  color: #fff;
}
.page-banner-sm { padding: 70px 0 50px; }
.page-banner-overlay {
  position: absolute; inset: 0;
  background: rgba(6,24,40,.5);
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 { color: #fff; margin-bottom: .75rem; }
.page-banner > .container > p { color: rgba(255,255,255,.88); font-size: 1.15rem; margin-bottom: 1.25rem; }
.breadcrumb { display: flex; list-style: none; gap: .5rem; flex-wrap: wrap; }
.breadcrumb li { color: rgba(255,255,255,.7); font-size: .9rem; }
.breadcrumb li::after { content: '/'; margin-left: .5rem; }
.breadcrumb li:last-child::after { display: none; }
.breadcrumb a { color: rgba(255,255,255,.85); }
.breadcrumb a:hover { color: #fff; }

/* ===================== PRODUCT DETAIL PAGE ===================== */
.product-intro { display: grid; grid-template-columns: 1fr 360px; gap: 3rem; }
.product-intro-text h3 { color: var(--blue); margin: 1.5rem 0 .75rem; }
.product-intro-text p { margin-bottom: 1rem; }
.quick-contact-box {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 2rem;
  position: sticky; top: 96px;
}
.quick-contact-box h3 { margin-bottom: .5rem; font-size: 1.2rem; }
.quick-contact-box p { font-size: .9rem; margin-bottom: 1.5rem; }

/* ===================== SPECS TABLE ===================== */
.table-responsive { overflow-x: auto; border-radius: 12px; border: 1px solid var(--gray-200); }
.specs-table, .comparison-table {
  width: 100%; border-collapse: collapse;
  font-size: .9rem;
}
.specs-table th, .comparison-table th {
  background: var(--blue); color: #fff;
  padding: 1rem 1.2rem; text-align: left; font-weight: 600;
}
.specs-table td, .comparison-table td {
  padding: .9rem 1.2rem;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}
.specs-table tr:last-child td, .comparison-table tr:last-child td { border-bottom: none; }
.specs-table tr:nth-child(even) td, .comparison-table tr:nth-child(even) td { background: var(--gray-50); }
.specs-note { margin-top: 1rem; font-size: .85rem; color: var(--gray-400); text-align: center; }

/* ===================== ABOUT PAGE ===================== */
.about-grid { display: grid; grid-template-columns: 1fr 340px; gap: 4rem; align-items: start; }
.about-text p { margin-bottom: 1rem; }
.about-stats-panel {
  background: linear-gradient(135deg, var(--blue-dark), var(--blue));
  border-radius: 20px; padding: 2rem;
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem;
  position: sticky; top: 96px;
}
.about-stat { text-align: center; color: #fff; }
.about-stat strong { display: block; font-size: 2rem; font-weight: 800; color: var(--cyan-light); }
.about-stat span { font-size: .85rem; color: rgba(255,255,255,.75); }
.values-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
.value-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: 16px; padding: 2rem;
  transition: all var(--transition);
}
.value-card:hover { border-color: var(--blue); box-shadow: var(--shadow); transform: translateY(-3px); }
.value-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.value-card h3 { margin-bottom: .5rem; }

/* ===================== CONTACT PAGE ===================== */
.contact-grid { display: grid; grid-template-columns: 1fr 380px; gap: 3rem; }
.contact-form-wrap h2 { margin-bottom: .5rem; }
.contact-form-wrap > p { margin-bottom: 2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 500; font-size: .9rem; color: var(--gray-700); margin-bottom: .4rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: .75rem 1rem;
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  font-size: .95rem; font-family: inherit;
  color: var(--gray-900);
  transition: border-color var(--transition);
  background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(30,140,58,.1);
}
.form-message { margin-top: 1rem; padding: .9rem 1rem; border-radius: 8px; font-weight: 500; }
.form-message.success { background: #dcfce7; color: #166534; border: 1px solid #86efac; }
.form-message.error   { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }

.contact-info-card {
  background: var(--blue-dark);
  color: #fff;
  border-radius: 16px; padding: 2rem;
  margin-bottom: 1.5rem;
}
.contact-info-card h3 { color: #fff; margin-bottom: 1.5rem; }
.ci-item { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 1.25rem; }
.ci-item svg { color: var(--cyan-light); flex-shrink: 0; margin-top: 2px; }
.ci-item strong { display: block; font-size: .85rem; color: rgba(255,255,255,.6); margin-bottom: .15rem; }
.ci-item a, .ci-item span { color: rgba(255,255,255,.9); font-size: .95rem; }
.ci-item a:hover { color: var(--cyan-light); }

.response-promise {
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: 12px; padding: 1.5rem;
  display: flex; gap: 1rem; align-items: flex-start;
}
.rp-icon { font-size: 2rem; flex-shrink: 0; }
.response-promise strong { display: block; margin-bottom: .25rem; }
.response-promise p { font-size: .9rem; margin: 0; }

/* ===================== FOOTER ===================== */
.site-footer { background: var(--gray-900); color: var(--gray-400); padding: 60px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.footer-logo { font-size: 1.4rem; font-weight: 800; color: #fff; display: block; margin-bottom: .75rem; }
.footer-brand p { font-size: .9rem; line-height: 1.7; }
.footer-social { display: flex; gap: .75rem; margin-top: 1.25rem; }
.footer-social a { color: var(--gray-400); transition: color var(--transition); }
.footer-social a:hover { color: var(--cyan-light); }
/* Footer Logo 适配深色背景：白色圆角背景 */
.footer-logo-img img {
  background: #fff;
  border-radius: 10px;
  padding: 4px 8px;
  filter: none !important;
  height: 48px;
  width: auto;
  object-fit: contain;
}
.footer-links h4 { color: #fff; font-size: .95rem; margin-bottom: 1rem; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: .5rem; }
.footer-links a { color: var(--gray-400); font-size: .9rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--cyan-light); text-decoration: none; }
.footer-contact h4 { color: #fff; font-size: .95rem; margin-bottom: 1rem; }
.footer-contact p { display: flex; align-items: center; gap: .6rem; font-size: .9rem; margin-bottom: .75rem; }
.footer-contact svg { color: var(--cyan-light); flex-shrink: 0; }
.footer-contact a { color: var(--gray-400); }
.footer-contact a:hover { color: var(--cyan-light); }
.footer-bottom {
  padding: 1.5rem 0;
  text-align: center;
  font-size: .85rem;
}

/* ===================== WHATSAPP FLOAT ===================== */
.whatsapp-float {
  position: fixed; bottom: 28px; right: 28px; z-index: 999;
  width: 58px; height: 58px;
  background: #25d366;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  box-shadow: 0 6px 24px rgba(37,211,102,.4);
  transition: all var(--transition);
  animation: pulse-green 2.5s infinite;
}
.whatsapp-float:hover { transform: scale(1.12); box-shadow: 0 8px 28px rgba(37,211,102,.55); text-decoration: none; }
@keyframes pulse-green {
  0%,100% { box-shadow: 0 6px 24px rgba(37,211,102,.4); }
  50% { box-shadow: 0 6px 32px rgba(37,211,102,.7), 0 0 0 12px rgba(37,211,102,.1); }
}

/* ===================== ADMIN INLINE HINT ===================== */
.text-center { text-align: center; }

/* ===================== 404 ===================== */
.page-404 { text-align: center; padding: 120px 24px; }
.page-404 h1 { font-size: 6rem; color: var(--gray-200); }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-intro { grid-template-columns: 1fr; }
  .quick-contact-box { position: static; }
  .about-grid { grid-template-columns: 1fr; }
  .about-stats-panel { position: static; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .main-nav {
    display: none;
    position: absolute; top: 76px; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 8px 24px rgba(0,0,0,.1);
    padding: 1rem;
    z-index: 999;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav a { padding: .75rem 1rem; }
  .nav-toggle { display: flex; }
  .hero { min-height: 80vh; }
  .hero-stats { gap: 1.5rem; }
  .hero-stats .stat strong { font-size: 1.5rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .form-row { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .products-detail-grid { grid-template-columns: 1fr; }
  .cta-box { padding: 2.5rem 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .features-grid { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: 1fr; }
  .about-stats-panel { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-content { padding: 80px 16px 60px; }
  .apps-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { gap: 1rem; }
  .about-stats-panel { grid-template-columns: 1fr 1fr; }
  .whatsapp-float { bottom: 16px; right: 16px; width: 52px; height: 52px; }
}

/* ===================== HOW IT WORKS ===================== */
.how-it-works-diagram {
  margin: 2rem 0 3rem;
  display: flex; justify-content: center;
}
.hiw-membrane-box {
  width: 100%; max-width: 720px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.hiw-membrane-inner { padding: 1.5rem 2rem; }
.ro-membrane-svg { width: 100%; height: auto; display: block; }
.hiw-diagram-caption {
  text-align: center; font-size: .85rem; color: var(--gray-400);
  margin-top: .75rem;
}
.process-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
.process-step-card {
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: 14px; padding: 1.5rem 1.25rem;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.process-step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.ps-num {
  display: inline-block;
  background: var(--blue); color: #fff;
  font-size: .75rem; font-weight: 700;
  width: 28px; height: 28px; line-height: 28px;
  border-radius: 50%; margin-bottom: .75rem;
}
.ps-icon {
  color: var(--blue); margin-bottom: .75rem;
  display: flex; justify-content: center;
}
.process-step-card strong {
  display: block; font-size: .95rem; margin-bottom: .4rem; color: var(--gray-900);
}
.process-step-card p { font-size: .82rem; color: var(--gray-600); margin: 0; }

/* ===================== SUB-PRODUCTS GRID ===================== */
.sub-products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.sub-product-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 16px; padding: 2rem;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex; flex-direction: column;
}
.sub-product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.sp-image {
  margin: -2rem -2rem 1rem;
  overflow: hidden;
  background: linear-gradient(135deg, var(--blue-light), var(--blue));
  border-radius: 14px 14px 0 0;
}
.sp-image img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  display: block;
}
.sp-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 1rem; gap: .75rem;
}
.sp-header h3 { font-size: 1.1rem; color: var(--blue); margin: 0; }
.sp-capacity-badge {
  background: #e8f4fd; color: var(--blue);
  font-size: .75rem; font-weight: 700;
  padding: .25rem .75rem; border-radius: 20px;
  white-space: nowrap; flex-shrink: 0;
}
.sp-desc { font-size: .9rem; color: var(--gray-600); margin-bottom: 1.25rem; }
.sp-features {
  list-style: none; margin-bottom: 1.5rem; flex: 1;
}
.sp-features li {
  display: flex; align-items: flex-start; gap: .5rem;
  font-size: .88rem; color: var(--gray-700); margin-bottom: .5rem;
}
.sp-features li svg { flex-shrink: 0; margin-top: 2px; }
.sp-specs-mini {
  display: grid; grid-template-columns: 1fr 1fr; gap: .4rem;
  background: var(--gray-50); border-radius: 10px;
  padding: .9rem; margin-bottom: 1.5rem;
}
.sp-spec-item { font-size: .8rem; }
.sp-spec-label { display: block; color: var(--gray-400); }
.sp-spec-val { font-weight: 600; color: var(--gray-900); }
.sp-actions {
  display: flex; gap: .75rem; margin-top: auto;
}
.sp-actions .btn { flex: 1; text-align: center; }

/* ===================== FEATURE CHECKMARK GRID ===================== */
.features-check-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.feature-check-item {
  display: flex; align-items: flex-start; gap: .75rem;
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: 10px; padding: 1rem 1.25rem;
  font-size: .92rem; color: var(--gray-700);
}
.feature-check-item svg { flex-shrink: 0; margin-top: 2px; }

/* ===================== SPECS KV GRID ===================== */
.specs-kv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  overflow: hidden;
}
.spec-kv-item {
  padding: .9rem 1.25rem;
  background: #fff;
  border-right: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}
.spec-kv-item:nth-child(even) { background: var(--gray-50); }
.spec-kv-label {
  font-size: .78rem; color: var(--gray-400);
  text-transform: uppercase; letter-spacing: .04em;
  margin-bottom: .25rem;
}
.spec-kv-value { font-weight: 700; color: var(--blue); font-size: .95rem; }

/* ===================== CONTACT PERSON INFO ===================== */
.contact-person-info {
  display: flex; align-items: center; gap: 1rem;
  background: var(--blue-dark); color: #fff;
  border-radius: 12px; padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.cp-avatar { flex-shrink: 0; }
.cp-avatar svg { display: block; }
.cp-details { font-size: .9rem; }
.cp-details strong { display: block; color: #fff; margin-bottom: .15rem; }
.cp-phone, .cp-email {
  color: var(--cyan-light);
  word-break: break-all;
}
.cp-phone:hover, .cp-email:hover { color: #fff; }

/* ===================== PRODUCT RICH CONTENT ===================== */
.product-rich-content h2 { margin: 0 0 1rem; font-size: 1.6rem; }
.product-rich-content h3 { color: var(--blue); margin: 2rem 0 .75rem; font-size: 1.2rem; }
.product-rich-content h4 { color: var(--gray-900); margin: 1.5rem 0 .5rem; font-size: 1rem; }
.product-rich-content p { margin-bottom: .9rem; color: var(--gray-700); }
.product-rich-content ul.challenge-list { list-style: none; margin-bottom: 1rem; }
.product-rich-content ul.challenge-list li {
  padding: .6rem 0 .6rem 1.5rem; border-bottom: 1px solid var(--gray-100);
  position: relative; font-size: .92rem;
}
.product-rich-content ul.challenge-list li::before {
  content: '▸'; color: var(--blue); position: absolute; left: 0;
}
.product-rich-content .process-steps {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
  gap: 1rem; margin: 1.5rem 0;
}
.product-rich-content .process-step {
  background: var(--gray-50); border: 1px solid var(--gray-200);
  border-radius: 10px; padding: 1rem; font-size: .88rem;
}
.product-rich-content .process-step .step-num {
  display: inline-block;
  background: var(--blue); color: #fff;
  font-size: .7rem; font-weight: 700;
  width: 24px; height: 24px; line-height: 24px; text-align: center;
  border-radius: 50%; margin-bottom: .5rem;
}
.product-rich-content .process-step strong {
  display: block; margin-bottom: .25rem; color: var(--blue);
}
.product-rich-content .process-step p { margin: 0; color: var(--gray-600); }

/* Responsive additions */
@media (max-width: 1024px) {
  .sub-products-grid { grid-template-columns: 1fr; }
  .process-steps-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .sp-header { flex-direction: column; }
  .sp-actions { flex-direction: column; }
  .process-steps-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
  .specs-kv-grid { grid-template-columns: 1fr 1fr; }
}