/* ===================================================
   STYLE.CSS - Nước & Đá Sạch Minh Phương Landing Page
   Màu chủ đạo: Xanh dương, Xanh ngọc, Trắng
   =================================================== */

/* ===== CSS VARIABLES (Design Tokens) ===== */
:root {
  /* Màu chính */
  --primary: #0ea5e9;       /* Sky blue */
  --primary-dark: #0284c7;
  --primary-deeper: #0369a1;
  --accent: #06b6d4;        /* Cyan */
  --accent-light: #22d3ee;
  --accent-glow: #67e8f9;

  /* Gradient */
  --grad-primary: linear-gradient(135deg, #0ea5e9, #06b6d4);
  --grad-hero: linear-gradient(160deg, #082f49 0%, #0c4a6e 40%, #0369a1 100%);
  --grad-section: linear-gradient(180deg, #f0f9ff 0%, #e0f2fe 100%);
  --grad-dark: linear-gradient(135deg, #0c1a2e 0%, #0a2540 50%, #062b4a 100%);
  --grad-text: linear-gradient(90deg, #38bdf8, #22d3ee, #06b6d4);

  /* Màu nền */
  --bg-white: #ffffff;
  --bg-light: #f0f9ff;
  --bg-card: #ffffff;
  --bg-dark: #082f49;

  /* Màu chữ */
  --text-dark: #0c2340;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-light: #cbd5e1;

  /* Border */
  --border: #bae6fd;
  --border-light: #e0f2fe;

  /* Shadow */
  --shadow-sm: 0 1px 3px rgba(14, 165, 233, 0.1);
  --shadow-md: 0 4px 20px rgba(14, 165, 233, 0.15);
  --shadow-lg: 0 10px 40px rgba(14, 165, 233, 0.2);
  --shadow-glow: 0 0 30px rgba(6, 182, 212, 0.3);

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Font */
  --font-main: 'Be Vietnam Pro', 'Inter', sans-serif;

  /* Spacing */
  --section-py: 96px;
  --container-max: 1200px;
  --container-px: 24px;

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

ul {
  list-style: none;
}

/* ===== CONTAINER ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-px);
}

/* ===== TEXT GRADIENT ===== */
.text-gradient {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-main);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
  text-align: center;
}

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(14, 165, 233, 0.5);
  filter: brightness(1.05);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  transform: translateY(-2px);
}

.btn-outline-sm {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  border: 2px solid var(--primary);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-main);
  transition: var(--transition);
  cursor: pointer;
}

.btn-outline-sm:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

.btn-full {
  width: 100%;
  justify-content: center;
  padding: 16px;
  font-size: 16px;
}

/* ===== SECTION COMMON ===== */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(14, 165, 233, 0.08);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  border: 1px solid rgba(14, 165, 233, 0.2);
}

.section-title {
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(8, 47, 73, 0.97);
  backdrop-filter: blur(20px);
  padding: 10px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.navbar__inner {
  display: flex;
  align-items: center;
  gap: 32px;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-icon {
  font-size: 28px;
  filter: drop-shadow(0 0 10px rgba(6, 182, 212, 0.6));
  animation: floatLogo 3s ease-in-out infinite;
}

@keyframes floatLogo {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-brand {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.logo-sub {
  font-size: 11px;
  color: var(--accent-glow);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  padding: 8px 16px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-full);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
  color: var(--accent-glow);
  background: rgba(6, 182, 212, 0.1);
}

.navbar__cta {
  font-size: 14px;
  padding: 10px 22px;
  flex-shrink: 0;
}

.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}

.navbar__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 16px 24px 24px;
  background: rgba(8, 47, 73, 0.98);
  border-top: 1px solid rgba(255,255,255,0.1);
}

.mobile-menu.open {
  display: flex;
}

.mobile-nav-link {
  padding: 12px 16px;
  color: rgba(255,255,255,0.85);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.mobile-nav-link:hover {
  color: #fff;
  background: rgba(255,255,255,0.08);
}

.mobile-cta {
  margin-top: 12px;
  justify-content: center;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(8, 20, 40, 0.88) 0%,
    rgba(8, 47, 73, 0.82) 50%,
    rgba(3, 105, 161, 0.65) 100%
  );
}

/* Hiệu ứng bong bóng nước */
.hero__bubbles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.bubble {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(125, 211, 252, 0.4), rgba(6, 182, 212, 0.1));
  border: 1px solid rgba(125, 211, 252, 0.2);
  animation: floatBubble linear infinite;
}

.bubble:nth-child(1) { width: 60px; height: 60px; left: 10%; animation-duration: 8s; animation-delay: 0s; bottom: -60px; }
.bubble:nth-child(2) { width: 30px; height: 30px; left: 25%; animation-duration: 10s; animation-delay: 2s; bottom: -30px; }
.bubble:nth-child(3) { width: 80px; height: 80px; left: 40%; animation-duration: 12s; animation-delay: 1s; bottom: -80px; }
.bubble:nth-child(4) { width: 20px; height: 20px; left: 55%; animation-duration: 7s; animation-delay: 3s; bottom: -20px; }
.bubble:nth-child(5) { width: 50px; height: 50px; left: 70%; animation-duration: 9s; animation-delay: 0.5s; bottom: -50px; }
.bubble:nth-child(6) { width: 35px; height: 35px; left: 80%; animation-duration: 11s; animation-delay: 2.5s; bottom: -35px; }
.bubble:nth-child(7) { width: 70px; height: 70px; left: 90%; animation-duration: 13s; animation-delay: 1.5s; bottom: -70px; }
.bubble:nth-child(8) { width: 25px; height: 25px; left: 5%; animation-duration: 6s; animation-delay: 4s; bottom: -25px; }

@keyframes floatBubble {
  0% { transform: translateY(0) rotate(0deg); opacity: 0.6; }
  100% { transform: translateY(-110vh) rotate(360deg); opacity: 0; }
}

.hero__content {
  position: relative;
  z-index: 2;
  padding: 120px var(--container-px) 80px;
  text-align: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6, 182, 212, 0.15);
  border: 1px solid rgba(6, 182, 212, 0.4);
  color: var(--accent-glow);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 28px;
  backdrop-filter: blur(8px);
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22d3ee;
  animation: pulseDot 1.5s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero__title {
  font-size: clamp(36px, 6vw, 76px);
  font-weight: 900;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero__subtitle {
  font-size: clamp(16px, 2vw, 19px);
  color: rgba(255, 255, 255, 0.85);
  max-width: 620px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero__stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 24px 40px;
  max-width: 720px;
  margin: 0 auto;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 32px;
}

.stat-number {
  font-size: 34px;
  font-weight: 900;
  color: #fff;
  line-height: 1;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 500;
  margin-top: 4px;
  text-align: center;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.15);
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.scroll-dot {
  width: 30px;
  height: 50px;
  border: 2px solid rgba(255,255,255,0.4);
  border-radius: 15px;
  position: relative;
}

.scroll-dot::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background: rgba(255,255,255,0.8);
  border-radius: 50%;
  animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
  0% { top: 8px; opacity: 1; }
  100% { top: 28px; opacity: 0; }
}

/* ===== TICKER BAR ===== */
.ticker-bar {
  background: var(--grad-primary);
  padding: 14px 0;
  overflow: hidden;
  position: relative;
}

.ticker-inner {
  display: flex;
  gap: 40px;
  white-space: nowrap;
  animation: ticker 30s linear infinite;
  width: max-content;
}

.ticker-inner span {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}

.ticker-sep {
  color: rgba(255,255,255,0.5) !important;
}

@keyframes ticker {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ===== USP SECTION ===== */
.usp-section {
  padding: 80px 0;
  background: var(--bg-light);
}

.usp-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.usp-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.usp-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-primary);
  opacity: 0;
  transition: var(--transition);
}

.usp-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border);
}

.usp-card:hover::before {
  opacity: 1;
}

.usp-icon {
  font-size: 44px;
  margin-bottom: 16px;
  display: block;
}

.usp-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.usp-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===== ABOUT SECTION ===== */
.about-section {
  padding: var(--section-py) 0;
  background: var(--bg-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-image-col {
  position: relative;
}

.about-img-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: visible;
}

.about-img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.about-badge-float {
  position: absolute;
  bottom: -24px;
  right: -24px;
  background: #fff;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
  border: 1px solid var(--border-light);
  z-index: 2;
}

.badge-icon {
  font-size: 28px;
}

.about-badge-float strong {
  display: block;
  font-size: 14px;
  color: var(--text-dark);
  font-weight: 700;
}

.about-badge-float small {
  font-size: 12px;
  color: var(--text-muted);
}

.about-content-col {
  padding-right: 20px;
}

.about-desc {
  color: var(--text-body);
  font-size: 16px;
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-points {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 28px 0 36px;
}

.about-point {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text-body);
  font-weight: 500;
}

.point-check {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--grad-primary);
  border-radius: 50%;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ===== PRODUCTS SECTION ===== */
.products-section {
  padding: var(--section-py) 0;
  background: var(--grad-section);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border);
}

.product-img-wrap {
  position: relative;
  height: 220px;
  overflow: hidden;
  background: linear-gradient(135deg, #e0f2fe, #bae6fd);
}

.product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.product-card:hover .product-img {
  transform: scale(1.06);
}

.product-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: linear-gradient(135deg, #f59e0b, #f97316);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
}

.product-badge--blue {
  background: var(--grad-primary);
}

.product-info {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-category {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.product-name {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 10px;
  line-height: 1.3;
}

.product-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.product-specs {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.product-specs li {
  font-size: 13px;
  color: var(--text-body);
  display: flex;
  align-items: center;
  gap: 6px;
}

.product-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

/* ===== PROCESS SECTION ===== */
.process-section {
  padding: var(--section-py) 0;
  position: relative;
  overflow: hidden;
  background: var(--grad-dark);
}

.process-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(6, 182, 212, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(14, 165, 233, 0.08) 0%, transparent 70%);
}

.process-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  position: relative;
  z-index: 1;
}

.process-step {
  flex: 1;
  text-align: center;
  padding: 36px 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
}

.process-step:hover {
  background: rgba(6, 182, 212, 0.08);
  border-color: rgba(6, 182, 212, 0.3);
  transform: translateY(-4px);
}

.step-number {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
  opacity: 0.7;
}

.step-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.step-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
  line-height: 1.3;
}

.step-desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
}

.process-arrow {
  font-size: 24px;
  color: var(--accent);
  align-self: center;
  padding: 0 8px;
  flex-shrink: 0;
  opacity: 0.5;
}

/* ===== CERTIFICATIONS ===== */
.cert-section {
  padding: var(--section-py) 0;
  background: var(--bg-white);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-bottom: 64px;
}

.cert-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  border: 2px solid var(--border-light);
  transition: var(--transition);
}

.cert-card:hover {
  border-color: var(--primary);
  background: rgba(14, 165, 233, 0.04);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.cert-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.cert-card h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.cert-card p {
  font-size: 12px;
  color: var(--text-muted);
}

/* Partners marquee */
.partners-section {
  margin-bottom: 64px;
}

.partners-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  text-align: center;
  margin-bottom: 28px;
}

.partners-scroll {
  overflow: hidden;
  position: relative;
}

.partners-scroll::before,
.partners-scroll::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 80px;
  z-index: 2;
}

.partners-scroll::before {
  left: 0;
  background: linear-gradient(to right, var(--bg-white), transparent);
}

.partners-scroll::after {
  right: 0;
  background: linear-gradient(to left, var(--bg-white), transparent);
}

.partners-inner {
  display: flex;
  gap: 20px;
  width: max-content;
  animation: partnerScroll 20s linear infinite;
}

@keyframes partnerScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.partner-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  white-space: nowrap;
  flex-shrink: 0;
  transition: var(--transition);
}

.partner-item:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

.testimonial-stars {
  color: #f59e0b;
  font-size: 18px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 15px;
  color: var(--text-body);
  font-style: italic;
  line-height: 1.7;
  margin-bottom: 20px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  background: var(--grad-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.testimonial-author strong {
  display: block;
  font-size: 14px;
  color: var(--text-dark);
  font-weight: 700;
}

.testimonial-author small {
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== CONTACT SECTION ===== */
.contact-section {
  padding: var(--section-py) 0;
  background: linear-gradient(180deg, #f0f9ff 0%, #e0f2fe 100%);
}

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

/* Form */
.contact-form {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
}

.form-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 28px;
}

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

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 15px;
  color: var(--text-body);
  background: var(--bg-light);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.1);
}

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

.form-note {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 12px;
}

/* Hotline box */
.hotline-box {
  background: var(--grad-dark);
  border-radius: var(--radius-xl);
  padding: 36px;
  text-align: center;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}

.hotline-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(6, 182, 212, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.hotline-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-glow);
  margin-bottom: 10px;
}

.hotline-number {
  display: block;
  font-size: 42px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  text-shadow: 0 0 30px rgba(6, 182, 212, 0.5);
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: var(--transition);
}

.hotline-number:hover {
  filter: brightness(1.2);
}

.hotline-sub {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 24px;
}

.contact-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.contact-btn {
  flex: 1;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  background: rgba(255,255,255,0.1);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
  transition: var(--transition);
  text-align: center;
  font-family: var(--font-main);
  cursor: pointer;
}

.contact-btn:hover {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.4);
}

.contact-btn--zalo {
  background: rgba(6, 182, 212, 0.2);
  border-color: rgba(6, 182, 212, 0.4);
}

/* Info cards */
.info-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.info-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg-white);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.info-card:hover {
  border-color: var(--border);
  transform: translateX(4px);
}

.info-icon {
  font-size: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}

.info-content strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.info-content p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.map-wrapper {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid var(--border-light);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-dark);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
  margin-bottom: 24px;
}

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

.social-link {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: var(--transition);
}

.social-link:hover {
  background: rgba(14, 165, 233, 0.2);
  border-color: rgba(14, 165, 233, 0.4);
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  transition: var(--transition);
  display: inline-block;
}

.footer-col ul li a:hover {
  color: var(--accent-glow);
  transform: translateX(4px);
}

.footer-contact ul li {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

/* Icon emoji cố định chiều rộng để căn đều */
.footer-icon {
  display: inline-block;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
  font-style: normal;
}

.footer-contact a {
  color: var(--accent-glow);
}

.footer-contact a:hover {
  text-decoration: none;
  opacity: 0.85;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}

/* ===== FLOATING CTA ===== */
.floating-cta {
  position: fixed;
  bottom: 32px;
  right: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.float-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: var(--transition);
  cursor: pointer;
}

.float-btn--call {
  background: linear-gradient(135deg, #10b981, #059669);
  animation: pulse 2s ease-in-out infinite;
}

.float-btn--zalo {
  background: var(--grad-primary);
}

.float-btn:hover {
  transform: scale(1.12);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); }
  50% { box-shadow: 0 0 0 12px rgba(16, 185, 129, 0); }
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(120px);
  background: var(--text-dark);
  color: #fff;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 500;
  z-index: 9999;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* ===== SCROLL ANIMATIONS ===== */
.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== PRODUCTS GRID 5 CỘT ===== */
.products-grid--5 {
  grid-template-columns: repeat(5, 1fr);
}

/* ===== BADGE GREEN (bình 7.5L) ===== */
.product-badge--green {
  background: linear-gradient(135deg, #10b981, #059669);
}

/* ===== CONTACT DIRECT (không dùng form) ===== */
.contact-direct {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* Hotline box toàn chiều rộng */
.hotline-box--wide {
  text-align: center;
  padding: 52px 40px;
  background: var(--grad-dark);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.hotline-box--wide::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(6, 182, 212, 0.12) 0%, transparent 65%);
  pointer-events: none;
}

.hotline-box--wide .hotline-label {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.15em;
  color: var(--accent-glow);
  margin-bottom: 14px;
}

.hotline-box--wide .hotline-number {
  font-size: 64px;
  margin-bottom: 12px;
  display: block;
}

.hotline-box--wide .hotline-sub {
  font-size: 17px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 32px;
}

/* Nút liên hệ to hơn */
.contact-actions--center {
  justify-content: center;
  gap: 20px;
}

.contact-btn--big {
  padding: 16px 40px;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius-full);
  flex: 0 1 220px;
}

/* Info cards dạng ngang (4 cột) */
.info-cards--row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  flex-direction: unset;
}

.info-cards--row .info-card {
  flex-direction: column;
  text-align: center;
  align-items: center;
}

.info-cards--row .info-icon {
  font-size: 28px;
  margin-bottom: 10px;
  margin-top: 0;
}

/* Map toàn chiều rộng */
.map-wrapper--wide {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid var(--border-light);
  width: 100%;
}

/* ===== WELCOME POPUP ===== */
.welcome-popup {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.welcome-popup.active {
  opacity: 1;
  visibility: visible;
}

.welcome-popup__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 20, 40, 0.88);
  backdrop-filter: blur(8px);
  cursor: pointer;
}

.welcome-popup__box {
  position: relative;
  z-index: 1;
  background: linear-gradient(160deg, #0c1a2e 0%, #0a2540 60%, #062b4a 100%);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-xl);
  padding: 44px 40px 36px;
  max-width: 520px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 60px rgba(6, 182, 212, 0.15);
  transform: translateY(30px) scale(0.96);
  transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-align: center;
  overflow: hidden;
}

.welcome-popup__box::before {
  content: '';
  position: absolute;
  top: -60px;
  left: -60px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.welcome-popup__box::after {
  content: '';
  position: absolute;
  bottom: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.welcome-popup.active .welcome-popup__box {
  transform: translateY(0) scale(1);
}

.popup-close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.6);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  z-index: 2;
  line-height: 1;
}

.popup-close:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  transform: rotate(90deg);
}

.popup-badge {
  display: inline-block;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
  animation: popupBadgePulse 1.5s ease-in-out infinite;
}

@keyframes popupBadgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.5); }
  50% { box-shadow: 0 0 0 8px rgba(245, 158, 11, 0); }
}

.popup-title {
  font-size: 30px;
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.popup-sub {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 24px;
  line-height: 1.6;
}

.popup-highlights {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
  text-align: left;
}

.popup-hl {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(6, 182, 212, 0.15);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.4;
}

.popup-hl strong {
  color: var(--accent-glow);
}

.popup-cta {
  margin-bottom: 12px;
  font-size: 16px;
  padding: 16px;
  letter-spacing: 0.02em;
}

.popup-btn-zalo {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-glow);
  border: 1.5px solid rgba(6, 182, 212, 0.4);
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-main);
  cursor: pointer;
  transition: var(--transition);
  padding: 14px;
  text-align: center;
}

.popup-btn-zalo:hover {
  background: rgba(6, 182, 212, 0.25);
  border-color: rgba(6, 182, 212, 0.6);
}

.popup-note {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  margin-top: 14px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
  .usp-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid--5 { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(3, 1fr); }
  .about-grid { gap: 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .info-cards--row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  :root { --section-py: 64px; }

  .navbar__nav, .navbar__cta { display: none; }
  .navbar__hamburger { display: flex; }

  /* Sửa tiêu đề hero không bị tràn */
  .hero__title {
    font-size: clamp(28px, 8vw, 48px);
    word-break: keep-all;
    overflow-wrap: break-word;
  }
  .hero__stats { padding: 20px 24px; }
  .stat-item { padding: 8px 16px; }
  .stat-number { font-size: 26px; }

  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-content-col { padding-right: 0; }
  .about-badge-float { bottom: 16px; right: 16px; }

  .process-steps {
    flex-wrap: wrap;
    gap: 16px;
  }

  .process-step { min-width: 45%; flex: 0 0 calc(50% - 8px); }
  .process-arrow { display: none; }

  .testimonials-grid { grid-template-columns: 1fr; gap: 16px; }

  .contact-grid { grid-template-columns: 1fr; gap: 40px; }

  /* Sửa nút gọi/zalo không bị tròn */
  .contact-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .contact-btn--big {
    flex: 1 1 auto;
    min-width: 140px;
    padding: 14px 20px;
    font-size: 15px;
    border-radius: var(--radius-full);
  }

  /* Info cards 2 cột trên tablet */
  .info-cards--row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  :root { --section-py: 48px; --container-px: 16px; }

  /* Hero */
  .hero__content { padding: 100px 16px 60px; }
  .hero__title {
    font-size: clamp(26px, 9vw, 40px);
    letter-spacing: -0.01em;
  }
  .hero__subtitle {
    font-size: 15px;
    padding: 0 4px;
  }
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  /* Stats 2x2 thay vì scroll ngang */
  .hero__stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 16px;
    overflow-x: unset;
  }
  .stat-divider { display: none; }
  .stat-item {
    min-width: unset;
    padding: 12px 8px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .stat-item:nth-child(1),
  .stat-item:nth-child(3) {
    border-right: 1px solid rgba(255,255,255,0.08);
  }
  .stat-number { font-size: 24px; }

  /* Lưới sản phẩm */
  .usp-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .products-grid--5 { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }

  /* Info cards 1 cột trên mobile */
  .info-cards--row {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .info-cards--row .info-card {
    flex-direction: row;
    text-align: left;
    align-items: flex-start;
  }
  .info-cards--row .info-icon {
    margin-bottom: 0;
    margin-top: 2px;
  }

  /* Hotline & nút liên hệ */
  .contact-form { padding: 24px; }
  .hotline-box { padding: 28px 20px; }
  .hotline-box--wide { padding: 36px 20px; }
  .hotline-number { font-size: 32px; }
  .hotline-box--wide .hotline-number { font-size: 36px; }
  .contact-actions--center {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .contact-btn--big {
    flex: 1 1 auto;
    width: 100%;
    padding: 16px 20px;
    font-size: 16px;
    border-radius: var(--radius-full);
    text-align: center;
  }

  /* Quy trình */
  .process-step { min-width: 100%; flex: 0 0 100%; }

  /* Footer */
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  /* Popup */
  .welcome-popup__box { padding: 36px 20px 28px; }
  .popup-title { font-size: 24px; }

  /* QR Zalo trên mobile */
  .zalo-qr-wrap { display: none; }
}

/* ===== ZALO QR CODE ===== */
.zalo-qr-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.zalo-qr-img {
  width: 480px;
  object-fit: contain;
  border-radius: 16px;
  border: 3px solid rgba(6, 182, 212, 0.5);
  background: #fff;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.25);
  transition: var(--transition);
}

.zalo-qr-img:hover {
  transform: scale(1.05);
  box-shadow: 0 0 30px rgba(6, 182, 212, 0.45);
  border-color: rgba(6, 182, 212, 0.8);
}

.zalo-qr-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
  letter-spacing: 0.02em;
}