/* =============================================
   HONG KONG HUXIU TECHNOLOGY INNOVATION LIMITED
   Shared Stylesheet
   ============================================= */

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

:root {
  --primary: #0f2b5b;
  --primary-dark: #0a1f44;
  --accent: #2f80ed;
  --accent-light: #eaf2fd;
  --text: #1c2430;
  --text-light: #5c6675;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --border: #e3e8ef;
  --success: #27ae60;
  --danger: #e74c3c;
  --radius: 12px;
  --shadow: 0 6px 24px rgba(15, 43, 91, 0.08);
  --shadow-lg: 0 14px 40px rgba(15, 43, 91, 0.14);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto,
    "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

/* ---------- Top bar ---------- */
.topbar {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.8rem;
  padding: 7px 0;
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.topbar a {
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand .logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.brand-name {
  font-weight: 700;
  color: var(--primary);
  font-size: 1.02rem;
  line-height: 1.25;
}

.brand-name small {
  display: block;
  font-weight: 500;
  color: var(--text-light);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary);
  margin: 5px 0;
  border-radius: 2px;
  transition: transform 0.2s;
}

/* ---------- Hero ---------- */
.hero {
  background:
    linear-gradient(120deg, rgba(10, 31, 68, 0.92), rgba(15, 43, 91, 0.78)),
    url("../images/B0GJS1MTH9.PT05.jpg") center / cover no-repeat;
  color: #fff;
  padding: 120px 0 100px;
}

.hero-inner {
  max-width: 640px;
}

.hero h1 {
  font-size: 2.8rem;
  line-height: 1.2;
  margin-bottom: 18px;
}

.hero h1 span {
  color: #7fb2ff;
}

.hero p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 30px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: #2568cf;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(47, 128, 237, 0.35);
}

.btn-outline {
  border: 2px solid #fff;
  color: #fff;
  margin-left: 12px;
}

.btn-outline:hover {
  background: #fff;
  color: var(--primary);
}

.btn-dark {
  background: var(--primary);
  color: #fff;
}

.btn-dark:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ---------- Sections ---------- */
.section {
  padding: 80px 0;
}

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

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

.section-head h2 {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 10px;
}

.section-head p {
  color: var(--text-light);
}

/* ---------- Feature cards ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  transition: transform 0.25s, box-shadow 0.25s;
}

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

.feature-card .icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 1.12rem;
  color: var(--primary);
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-light);
  font-size: 0.93rem;
}

/* ---------- Product gallery ---------- */
.product-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.product-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.product-gallery img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.25s;
}

.product-gallery img:hover {
  transform: scale(1.03);
}

.product-gallery img:first-child {
  grid-column: 1 / -1;
  height: 300px;
}

/* ---------- Spec table ---------- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.spec-table th {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  width: 200px;
}

.spec-table tr:last-child th,
.spec-table tr:last-child td {
  border-bottom: none;
}

/* ---------- Steps / instructions ---------- */
.steps {
  counter-reset: step;
  display: grid;
  gap: 18px;
}

.step {
  counter-increment: step;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 26px 22px 78px;
  position: relative;
  box-shadow: var(--shadow);
}

.step::before {
  content: counter(step);
  position: absolute;
  left: 22px;
  top: 22px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step h3 {
  color: var(--primary);
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.step p {
  color: var(--text-light);
  font-size: 0.95rem;
}

.note-box {
  background: var(--accent-light);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 18px 22px;
  margin: 20px 0;
  color: #1f3a63;
  font-size: 0.95rem;
}

.warn-box {
  background: #fdf0ef;
  border-left: 4px solid var(--danger);
  border-radius: 8px;
  padding: 18px 22px;
  margin: 20px 0;
  color: #7a2e25;
  font-size: 0.95rem;
}

/* ---------- Brand story ---------- */
.story-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 56px;
}

.story-block.reverse {
  direction: rtl;
}

.story-block.reverse > * {
  direction: ltr;
}

.story-block img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.story-text h2 {
  color: var(--primary);
  font-size: 1.6rem;
  margin-bottom: 14px;
}

.story-text p {
  color: var(--text-light);
  margin-bottom: 12px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.value-item {
  text-align: center;
  padding: 28px 20px;
}

.value-item .icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.value-item h4 {
  color: var(--primary);
  margin-bottom: 6px;
}

.value-item p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.contact-info-item .icon {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  border-radius: 12px;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.contact-info-item h4 {
  color: var(--primary);
  font-size: 1rem;
}

.contact-info-item p {
  color: var(--text-light);
  font-size: 0.93rem;
}

.contact-form {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.contact-form label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin: 16px 0 6px;
  color: var(--primary);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47, 128, 237, 0.15);
}

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

.contact-form .btn {
  margin-top: 20px;
  width: 100%;
  text-align: center;
  border: none;
  cursor: pointer;
}

/* ---------- Map / location ---------- */
.map-placeholder {
  background: var(--accent-light);
  border-radius: var(--radius);
  padding: 60px 20px;
  text-align: center;
  color: var(--accent);
  font-weight: 600;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 24px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-grid h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 14px;
}

.footer-grid p,
.footer-grid li {
  font-size: 0.9rem;
}

.footer-grid ul {
  list-style: none;
}

.footer-grid a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-grid a:hover {
  color: #fff;
}

.footer-grid li {
  margin-bottom: 8px;
}

.footer-brand {
  font-weight: 700;
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.footer-bottom {
  padding-top: 20px;
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- Page banner ---------- */
.page-banner {
  background: linear-gradient(120deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 64px 0;
  text-align: center;
}

.page-banner h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.page-banner p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin: 0 auto;
}

.breadcrumb {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 12px;
}

.breadcrumb a {
  color: #7fb2ff;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .feature-grid,
  .values-grid {
    grid-template-columns: 1fr 1fr;
  }

  .product-showcase,
  .story-block,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .story-block.reverse {
    direction: ltr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 4%;
    box-shadow: 0 18px 30px rgba(15, 43, 91, 0.12);
    display: none;
  }

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

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 14px 6px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links a:hover,
  .nav-links a.active {
    border-bottom: 1px solid var(--accent);
  }

  .hero {
    padding: 90px 0 80px;
  }

  .hero h1 {
    font-size: 2rem;
  }
}

@media (max-width: 560px) {
  .feature-grid,
  .values-grid,
  .product-gallery {
    grid-template-columns: 1fr;
  }

  .product-gallery img:first-child {
    height: 240px;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  .btn-outline {
    margin-left: 0;
    margin-top: 12px;
  }

  .spec-table th {
    width: 120px;
  }

  .section {
    padding: 56px 0;
  }
}