/* ============================================================
   Yancheng Beigong — Landing Page Styles
   Industrial Minimalist • Indonesian Market
   ============================================================ */

/* ---------- Local Fonts (Inter) ---------- */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url('../fonts/inter-latin.woff2') format('woff2-variations'),
       url('../fonts/inter-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url('../fonts/inter-latin-ext.woff2') format('woff2-variations'),
       url('../fonts/inter-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF,
    U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020,
    U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #0b4d6e;
  --color-primary-dark: #073650;
  --color-accent: #ff8a1f;
  --color-accent-dark: #e47510;
  --color-bg: #ffffff;
  --color-bg-alt: #f4f6f8;
  --color-text: #1f2933;
  --color-text-muted: #52606d;
  --color-border: #e1e6eb;
  --max-width: 1200px;
  --radius: 12px;
  --shadow-sm: 0 2px 8px rgba(11, 77, 110, 0.08);
  --shadow-md: 0 8px 24px rgba(11, 77, 110, 0.12);
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-accent);
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
}

.btn-lg {
  padding: 14px 30px;
  font-size: 1rem;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
}

.brand:hover {
  color: var(--color-text);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
}

.brand-text small {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.main-nav ul {
  display: flex;
  gap: 6px;
}

.main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 6px;
}

.main-nav a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

.header-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  line-height: 1.2;
}

.header-email {
  padding: 7px 16px;
  font-size: 0.85rem;
  gap: 6px;
}

.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-primary);
}

.header-phone:hover {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2.5px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 55%, #145e85 100%);
  z-index: 0;
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255, 138, 31, 0.25) 0, transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.08) 0, transparent 40%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('../image/hero.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.22;
  mix-blend-mode: overlay;
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: 80px 24px;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(255, 138, 31, 0.18);
  border: 1px solid rgba(255, 138, 31, 0.5);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}

.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-lead {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 32px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.hero-stats li {
  display: flex;
  flex-direction: column;
}

.hero-stats strong {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
}

.hero-stats span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 6px;
}

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

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

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  font-weight: 800;
  color: var(--color-primary-dark);
  line-height: 1.2;
  margin-bottom: 14px;
}

.section-sub {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: center;
}

.about-media img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.about-copy h2 {
  font-size: clamp(1.6rem, 2.8vw, 2.1rem);
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 18px;
  line-height: 1.25;
}

.about-copy p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.about-copy strong {
  color: var(--color-text);
}

.about-points {
  margin-top: 28px;
  display: grid;
  gap: 18px;
}

.point {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.point-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.point h4 {
  font-size: 1rem;
  color: var(--color-primary-dark);
  margin-bottom: 2px;
}

.point p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* ---------- Product Grid ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.product-featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 0;
}

.product {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.product:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-alt);
}

.product-featured .product-image {
  aspect-ratio: auto;
  height: 100%;
  min-height: 280px;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product:hover .product-image img {
  transform: scale(1.05);
}

.badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 999px;
  letter-spacing: 0.03em;
}

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

.product-featured .product-body {
  padding: 36px;
  justify-content: center;
}

.product-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
  line-height: 1.3;
}

.product-featured .product-body h3 {
  font-size: 1.5rem;
}

.product-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.product-apps {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.product-apps li {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-primary);
  background: rgba(11, 77, 110, 0.08);
  padding: 5px 12px;
  border-radius: 999px;
}

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

.feature {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  border-radius: 16px;
  background: rgba(255, 138, 31, 0.1);
  color: var(--color-accent);
  display: grid;
  place-items: center;
}

.feature h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.feature p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* ---------- Contact ---------- */
.contact-wrap {
  max-width: 1000px;
}

.contact-split {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}

.contact-media img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.contact-info h2 {
  font-size: clamp(1.6rem, 2.8vw, 2.1rem);
  font-weight: 800;
  color: var(--color-primary-dark);
  line-height: 1.25;
  margin: 10px 0 14px;
}

.contact-info .section-sub {
  text-align: left;
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  color: inherit;
}

a.contact-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
  color: inherit;
}

.contact-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--color-primary);
  color: #fff;
  display: grid;
  place-items: center;
}

.contact-card h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.contact-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.contact-hint {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.contact-cta {
  text-align: center;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding: 56px 24px 40px;
}

.footer-brand .brand {
  color: #fff;
  margin-bottom: 14px;
}

.footer-brand .brand-text strong {
  color: #fff;
}

.footer-brand .brand-text small {
  color: rgba(255, 255, 255, 0.6);
}

.footer-tag {
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 360px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-col ul {
  display: grid;
  gap: 10px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.92rem;
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-col li {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.92rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px 0;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
}

/* ---------- Reveal Animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ============================================================
   Responsive — Tablet (≤960px)
   ============================================================ */
@media (max-width: 960px) {
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 12px 24px 20px;
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.35s ease, opacity 0.35s ease;
    pointer-events: none;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 4px;
  }

  .main-nav a {
    padding: 12px 10px;
    border-bottom: 1px solid var(--color-border);
  }

  .main-nav li:last-child a {
    border-bottom: none;
  }

  .header-contact {
    display: none;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .product-featured {
    grid-template-columns: 1fr;
  }

  .product-featured .product-image {
    min-height: 220px;
  }

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

/* ============================================================
   Responsive — Mobile (≤720px)
   ============================================================ */
@media (max-width: 720px) {
  .section {
    padding: 56px 0;
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    padding: 56px 24px;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stats strong {
    font-size: 1.5rem;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .features {
    grid-template-columns: 1fr;
  }

  .contact-cards {
    grid-template-columns: 1fr;
  }

  .contact-split {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 36px;
  }

  .contact-info .section-sub {
    text-align: center;
  }

  .contact-info {
    text-align: center;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 24px 32px;
  }

  .product-featured .product-body {
    padding: 24px;
  }

  .hero-actions .btn {
    width: 100%;
  }
}