/* =========================================================
   Landing Huawei Salud para Net-Trust
   Estilo inspirado en net-trust.cl:
   navegación superior, secciones SERVICIOS / NOSOTROS /
   PRODUCTOS / ALIANZAS / CONTACTO, paleta azul-cian + rojo.
   Fuente: Arial. Sin emojis.
   ========================================================= */

:root {
  --nt-blue: #0098bd;
  --nt-blue-dark: #006f8f;
  --nt-red: #b5162b;
  --nt-red-dark: #8f1021;
  --black: #07090d;
  --dark: #141821;
  --gray: #5c6472;
  --light: #f3f6f8;
  --white: #ffffff;
  --border: #dce4ea;
  --shadow: 0 18px 45px rgba(8, 20, 30, 0.12);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
}

button,
input,
select,
textarea {
  font-family: Arial, Helvetica, sans-serif;
}

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

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

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}

.top-line {
  background: var(--black);
  color: var(--white);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.top-line-content {
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.nav {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: flex;
  align-items: center;
}

.brand-logo-nettrust {
  width: 170px;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--dark);
}

.nav-links a {
  position: relative;
  padding: 28px 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 22px;
  width: 0;
  height: 2px;
  background: var(--nt-blue);
  transition: width 0.2s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

.menu-btn {
  display: none;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--dark);
  padding: 10px 14px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  cursor: pointer;
}

/* Hero */

.hero {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    linear-gradient(110deg, rgba(7, 9, 13, 0.94) 0%, rgba(7, 9, 13, 0.86) 45%, rgba(0, 152, 189, 0.62) 100%),
    linear-gradient(135deg, #071016 0%, #102a35 42%, #041015 100%);
  color: var(--white);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 82% 22%, rgba(181, 22, 43, 0.55), transparent 24%),
    radial-gradient(circle at 68% 78%, rgba(0, 152, 189, 0.38), transparent 30%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.12;
  background:
    linear-gradient(90deg, transparent 24%, rgba(255, 255, 255, 0.25) 25%, transparent 26%),
    linear-gradient(0deg, transparent 24%, rgba(255, 255, 255, 0.25) 25%, transparent 26%);
  background-size: 58px 58px;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
  gap: 56px;
  padding: 95px 0;
}

.hero-kicker,
.section-label {
  color: var(--nt-blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.04;
  letter-spacing: -1.4px;
  margin-bottom: 22px;
}

.hero-description {
  max-width: 730px;
  color: #e9eef2;
  font-size: 19px;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 22px;
  border: 2px solid transparent;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  transition: 0.2s ease;
}

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

.btn-primary:hover {
  background: var(--nt-red-dark);
  border-color: var(--nt-red-dark);
}

.btn-outline {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.05);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
}

.alliance-card {
  background: rgba(255, 255, 255, 0.94);
  color: var(--dark);
  padding: 36px;
  box-shadow: var(--shadow);
  border-top: 5px solid var(--nt-blue);
}

.alliance-logos {
  display: grid;
  grid-template-columns: 1fr 1px 0.7fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 28px;
}

.alliance-logo-nettrust {
  width: 210px;
  max-height: 105px;
  object-fit: contain;
}

.alliance-logo-huawei {
  width: 125px;
  max-height: 130px;
  object-fit: contain;
  margin-left: auto;
}

.alliance-divider {
  width: 1px;
  height: 110px;
  background: var(--border);
}

.alliance-card h2 {
  font-size: 25px;
  line-height: 1.22;
  margin-bottom: 22px;
}

.alliance-list {
  display: grid;
  gap: 12px;
}

.alliance-list div {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  align-items: center;
  padding: 14px;
  background: var(--light);
  border-left: 4px solid var(--nt-red);
}

.alliance-list strong {
  color: var(--nt-blue);
  font-size: 20px;
}

.alliance-list span {
  color: var(--gray);
  font-size: 14px;
  font-weight: 700;
}

/* General sections */

section {
  padding: 86px 0;
}

.section-light {
  background: var(--light);
}

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

.section-intro {
  padding: 72px 0;
}

.section-center {
  max-width: 850px;
  margin: 0 auto;
  text-align: center;
}

.section-center p:not(.section-label) {
  color: var(--gray);
  font-size: 18px;
}

h2 {
  font-size: clamp(30px, 3.4vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
}

.section-title-row {
  display: grid;
  grid-template-columns: 1fr 0.82fr;
  gap: 42px;
  align-items: end;
  margin-bottom: 42px;
}

.section-title-row > p {
  color: var(--gray);
  font-size: 17px;
}

.title-row-dark > p {
  color: #cbd5e1;
}

.section-copy {
  color: var(--gray);
  font-size: 17px;
  margin-bottom: 28px;
}

/* Services */

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.service-card {
  background: var(--white);
  box-shadow: var(--shadow);
}

.service-image {
  min-height: 210px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #d8edf3, #ffffff);
}

.service-image::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(0, 152, 189, 0.82), rgba(8, 10, 14, 0.85)),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.24) 0 1px, transparent 1px 14px);
}

.service-image::after {
  content: "";
  position: absolute;
  left: 34px;
  right: 34px;
  top: 50%;
  height: 4px;
  background: var(--white);
  box-shadow:
    0 24px 0 rgba(255,255,255,0.7),
    0 -24px 0 rgba(255,255,255,0.7);
}

.service-security::before {
  background:
    linear-gradient(135deg, rgba(181, 22, 43, 0.84), rgba(8, 10, 14, 0.88)),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.24) 0 1px, transparent 1px 14px);
}

.service-monitoring::before {
  background:
    linear-gradient(135deg, rgba(0, 111, 143, 0.86), rgba(20, 24, 33, 0.92)),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.24) 0 1px, transparent 1px 14px);
}

.service-body {
  padding: 28px;
}

.service-number {
  display: inline-block;
  color: var(--nt-red);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

.service-body h3 {
  font-size: 21px;
  margin-bottom: 10px;
}

.service-body p {
  color: var(--gray);
}

/* Architecture */

.architecture-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  align-items: center;
}

.architecture-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.architecture-tags span {
  border: 1px solid var(--border);
  padding: 9px 13px;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--nt-blue-dark);
  background: var(--white);
}

.architecture-panel {
  background: var(--white);
  box-shadow: var(--shadow);
  border-top: 5px solid var(--nt-red);
  padding: 28px;
}

.architecture-layer {
  border: 1px solid var(--border);
  padding: 18px;
  margin-bottom: 12px;
}

.architecture-layer:last-child {
  margin-bottom: 0;
}

.architecture-layer strong {
  display: block;
  color: var(--dark);
  margin-bottom: 4px;
}

.architecture-layer span {
  display: block;
  color: var(--gray);
  font-size: 14px;
}

.layer-dark {
  background: var(--dark);
  border-color: var(--dark);
}

.layer-dark strong,
.layer-dark span {
  color: var(--white);
}

/* Products */

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.product-card {
  min-height: 280px;
  padding: 28px;
  background: #111823;
  border: 1px solid rgba(255,255,255,0.12);
  border-top: 4px solid var(--nt-blue);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  border-top-color: var(--nt-red);
}

.product-card span {
  display: block;
  color: var(--nt-blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}

.product-card h3 {
  font-size: 21px;
  line-height: 1.22;
  margin-bottom: 14px;
}

.product-card p {
  color: #cbd5e1;
  font-size: 15px;
}

/* Alliance section */

.alliance-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 44px;
  align-items: center;
}

.alliance-text p:not(.section-label) {
  color: var(--gray);
  font-size: 17px;
}

.logo-panel {
  min-height: 290px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1fr 1px 0.85fr;
  align-items: center;
  gap: 28px;
  padding: 36px;
  background: var(--white);
}

.panel-logo-nettrust {
  max-width: 265px;
  margin: 0 auto;
}

.panel-logo-huawei {
  max-width: 205px;
  margin: 0 auto;
}

.logo-panel-divider {
  width: 1px;
  height: 190px;
  background: var(--border);
}

/* Use cases */

.usecase-wrapper {
  display: grid;
  gap: 36px;
}

.usecase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.usecase-grid article {
  background: var(--white);
  padding: 26px;
  border-bottom: 4px solid var(--nt-blue);
  box-shadow: 0 12px 28px rgba(8, 20, 30, 0.08);
}

.usecase-grid strong {
  color: var(--nt-red);
  font-size: 20px;
}

.usecase-grid h3 {
  font-size: 19px;
  line-height: 1.22;
  margin: 12px 0 10px;
}

.usecase-grid p {
  color: var(--gray);
  font-size: 14px;
}

/* Contact */

.contact-grid {
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 44px;
  align-items: start;
}

.contact-copy p:not(.section-label) {
  color: var(--gray);
  font-size: 17px;
}

.contact-data {
  margin-top: 26px;
  display: grid;
  gap: 12px;
}

.contact-data div {
  padding: 18px;
  background: var(--light);
  border-left: 4px solid var(--nt-red);
}

.contact-data strong {
  display: block;
  color: var(--dark);
  margin-bottom: 3px;
}

.contact-data span {
  color: var(--gray);
}

.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 30px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

label {
  display: grid;
  gap: 7px;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--dark);
  text-transform: uppercase;
}

label.full {
  grid-column: 1 / -1;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  padding: 14px;
  font-size: 15px;
  color: var(--dark);
  background: var(--white);
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--nt-blue);
  box-shadow: 0 0 0 3px rgba(0, 152, 189, 0.12);
}

textarea {
  min-height: 130px;
  resize: vertical;
}

.submit-btn {
  margin-top: 18px;
  width: 100%;
  border: none;
  background: var(--nt-red);
  color: var(--white);
  min-height: 50px;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.submit-btn:hover {
  background: var(--nt-red-dark);
}

/* Footer */

.site-footer {
  background: var(--black);
  color: #cbd5e1;
  padding: 34px 0;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-logo {
  width: 150px;
  margin-bottom: 10px;
}

.footer-grid strong {
  display: block;
  color: var(--white);
}

.footer-grid span {
  display: block;
}

.help-button {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 1200;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: var(--nt-red);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.08em;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
}

/* Responsive */

@media (max-width: 1050px) {
  .hero-grid,
  .architecture-grid,
  .alliance-section,
  .contact-grid,
  .section-title-row {
    grid-template-columns: 1fr;
  }

  .service-grid,
  .product-grid,
  .usecase-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .nav-links {
    gap: 18px;
    font-size: 12px;
  }
}

@media (max-width: 820px) {
  .top-line-content {
    justify-content: center;
    text-align: center;
  }

  .top-line-content span:last-child {
    display: none;
  }

  .nav {
    min-height: 78px;
  }

  .brand-logo-nettrust {
    width: 145px;
  }

  .menu-btn {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 110px;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 18px 4%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    padding: 14px 0;
  }

  .nav-links a::after {
    bottom: 8px;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid {
    padding: 72px 0;
  }

  .alliance-logos,
  .logo-panel {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .alliance-divider,
  .logo-panel-divider {
    width: 100%;
    height: 1px;
  }

  .alliance-logo-huawei,
  .alliance-logo-nettrust {
    margin: 0 auto;
  }
}

@media (max-width: 620px) {
  section {
    padding: 64px 0;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero-description {
    font-size: 17px;
  }

  .service-grid,
  .product-grid,
  .usecase-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .alliance-card,
  .architecture-panel,
  .contact-form,
  .logo-panel {
    padding: 24px;
  }

  .help-button {
    right: 16px;
    bottom: 16px;
    width: 60px;
    height: 60px;
  }
}