/* ===== K&W World Engineering ===== */
:root {
  --navy: #0b1526;
  --navy-2: #101f38;
  --amber: #f5a623;
  --amber-dark: #d98c0a;
  --text: #1c2533;
  --muted: #5b6a80;
  --light: #f6f8fb;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(11, 21, 38, .12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Inter', system-ui, sans-serif; color: var(--text); background: var(--white); line-height: 1.6; }
img { max-width: 100%; display: block; }
a { color: var(--amber-dark); text-decoration: none; }
h1, h2, h3 { font-family: 'Archivo', 'Inter', sans-serif; line-height: 1.15; }

.container { width: min(1140px, 92%); margin: 0 auto; }

/* ===== Buttons ===== */
.btn { display: inline-block; padding: .9rem 1.7rem; border-radius: 999px; font-weight: 700; font-size: .95rem; transition: transform .2s, box-shadow .2s, background .2s; }
.btn:hover { transform: translateY(-2px); }
.btn-amber { background: var(--amber); color: var(--navy); box-shadow: 0 6px 20px rgba(245, 166, 35, .4); }
.btn-amber:hover { background: #ffb838; }
.btn-ghost { border: 2px solid rgba(255,255,255,.5); color: var(--white); }
.btn-ghost:hover { border-color: var(--amber); color: var(--amber); }
.btn-sm { padding: .55rem 1.2rem; font-size: .85rem; }

/* ===== Nav ===== */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; transition: background .3s, box-shadow .3s; }
.nav.scrolled { background: rgba(11, 21, 38, .96); box-shadow: 0 2px 20px rgba(0,0,0,.35); backdrop-filter: blur(8px); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; padding: .8rem 0; }
.brand { display: flex; align-items: center; gap: .65rem; color: var(--white); font-family: 'Archivo'; font-weight: 800; font-size: 1.05rem; letter-spacing: .3px; }
.brand img { width: 42px; height: 42px; border-radius: 50%; border: 2px solid var(--amber); }
.brand em { font-style: normal; color: var(--amber); }
.nav-links { display: flex; align-items: center; gap: 1.6rem; }
.nav-links a { color: rgba(255,255,255,.85); font-weight: 600; font-size: .92rem; }
.nav-links a:hover { color: var(--amber); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; }
.nav-toggle span { display: block; width: 26px; height: 3px; background: var(--white); margin: 5px 0; border-radius: 2px; transition: .3s; }

/* ===== Hero ===== */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; color: var(--white); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; transform: scale(1.05); animation: heroZoom 18s ease-in-out infinite alternate; }
@keyframes heroZoom { to { transform: scale(1.15); } }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(100deg, rgba(11,21,38,.95) 20%, rgba(11,21,38,.75) 55%, rgba(11,21,38,.45)); }
.hero-content { position: relative; padding: 8rem 0 4rem; max-width: 720px; }
.hero-kicker { color: var(--amber); font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; font-size: .8rem; margin-bottom: 1rem; }
.hero h1 { font-size: clamp(2.2rem, 5.4vw, 3.9rem); font-weight: 900; margin-bottom: .8rem; }
.hero h1 .amber { color: var(--amber); }
.hero-zh { font-size: 1.05rem; color: rgba(255,255,255,.85); margin-bottom: .6rem; font-weight: 500; }
.hero-sub { color: rgba(255,255,255,.75); max-width: 560px; margin-bottom: 1.8rem; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.6rem; }
.hero-badges { display: flex; gap: 2.2rem; flex-wrap: wrap; }
.hero-badges div { border-left: 3px solid var(--amber); padding-left: .9rem; }
.hero-badges strong { display: block; font-size: .95rem; }
.hero-badges span { font-size: .8rem; color: rgba(255,255,255,.65); }

/* ===== Stats ===== */
.stats { background: var(--navy); color: var(--white); padding: 2.6rem 0; border-top: 1px solid rgba(255,255,255,.08); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; text-align: center; }
.stat-num, .stat-plus { font-family: 'Archivo'; font-size: 2.6rem; font-weight: 900; color: var(--amber); }
.stats-grid p { font-size: .85rem; color: rgba(255,255,255,.7); margin-top: .2rem; }

/* ===== Sections ===== */
.section { padding: 5.5rem 0; }
.section-dark { background: var(--navy); color: var(--white); }
.section-kicker { color: var(--amber-dark); font-weight: 800; text-transform: uppercase; letter-spacing: 2px; font-size: .78rem; margin-bottom: .5rem; }
.section-dark .section-kicker { color: var(--amber); }
.section h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); font-weight: 900; margin-bottom: .9rem; }
.section-sub { color: var(--muted); max-width: 640px; margin-bottom: 2.6rem; }
.section-dark .section-sub, .section-dark p { color: rgba(255,255,255,.75); }

/* ===== Service cards ===== */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.3rem; }
.card { background: var(--light); border: 1px solid #e7ecf3; border-radius: var(--radius); padding: 1.7rem 1.4rem; transition: transform .25s, box-shadow .25s, border-color .25s; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--amber); }
.card-icon { font-size: 1.9rem; margin-bottom: .8rem; }
.card h3 { font-size: 1.02rem; margin-bottom: .5rem; }
.card p { font-size: .86rem; color: var(--muted); }

/* ===== Split (Why us) ===== */
.split { display: grid; grid-template-columns: 1.1fr 1fr; gap: 3.5rem; align-items: center; }
.split-text h2 { margin-bottom: 1.1rem; }
.split-text > p { margin-bottom: 1.4rem; }
.checks { list-style: none; margin-bottom: 1.8rem; }
.checks li { padding-left: 1.9rem; position: relative; margin-bottom: .65rem; font-size: .95rem; }
.checks li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--amber); font-weight: 900; font-size: 1.05rem; }
.split-media { position: relative; }
.split-img-main { border-radius: var(--radius); box-shadow: 0 20px 50px rgba(0,0,0,.45); }
.split-img-float { position: absolute; width: 52%; bottom: -2.2rem; left: -2.4rem; border-radius: var(--radius); border: 5px solid var(--navy); box-shadow: 0 16px 40px rgba(0,0,0,.5); }

/* ===== Gallery ===== */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.gallery figure { border-radius: var(--radius); overflow: hidden; background: var(--navy); position: relative; }
.gallery img { aspect-ratio: 3 / 4; object-fit: cover; width: 100%; transition: transform .4s, opacity .4s; }
.gallery figure:hover img { transform: scale(1.06); opacity: .35; }
.gallery figcaption { position: absolute; inset: auto 0 0 0; padding: 1rem; color: var(--white); background: linear-gradient(transparent, rgba(11,21,38,.92)); }
.gallery figcaption strong { display: block; font-size: .92rem; }
.gallery figcaption span { font-size: .78rem; color: rgba(255,255,255,.75); }
.locations { margin-top: 2.4rem; }
.locations > p { font-weight: 700; margin-bottom: .8rem; }
.chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.chips span { background: var(--light); border: 1px solid #e2e8f1; padding: .35rem .9rem; border-radius: 999px; font-size: .82rem; color: var(--muted); }

/* ===== Steps ===== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.step { background: var(--navy-2); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); padding: 1.8rem 1.4rem; }
.step span { font-family: 'Archivo'; font-size: 2rem; font-weight: 900; color: var(--amber); display: block; margin-bottom: .6rem; }
.step h3 { font-size: 1.05rem; margin-bottom: .5rem; }
.step p { font-size: .86rem; }

/* ===== Map ===== */
.map-wrap { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.map-wrap iframe { width: 100%; height: 420px; border: 0; display: block; }

/* ===== Contact ===== */
.section-contact { background: linear-gradient(160deg, var(--light), #eef2f8); }
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.3rem; margin-bottom: 2.2rem; }
.contact-card { display: flex; gap: 1rem; align-items: flex-start; background: var(--white); border: 1px solid #e7ecf3; border-radius: var(--radius); padding: 1.5rem; color: var(--text); transition: transform .25s, box-shadow .25s; }
.contact-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.cc-icon { font-size: 1.7rem; }
.contact-card strong { display: block; font-size: 1.05rem; }
.contact-card span { display: block; font-size: .92rem; color: var(--muted); }
.contact-card em { font-style: normal; font-size: .78rem; color: var(--amber-dark); font-weight: 700; }
.socials { display: flex; gap: 1rem; flex-wrap: wrap; }
.socials a { background: var(--navy); color: var(--white); padding: .55rem 1.3rem; border-radius: 999px; font-size: .85rem; font-weight: 600; transition: background .2s; }
.socials a:hover { background: var(--amber); color: var(--navy); }

/* ===== Footer ===== */
.footer { background: var(--navy); color: rgba(255,255,255,.7); padding: 2.2rem 0; font-size: .85rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
.footer strong { color: var(--white); }

/* ===== WhatsApp float ===== */
.wa-float { position: fixed; right: 1.4rem; bottom: 1.4rem; z-index: 90; width: 58px; height: 58px; border-radius: 50%; background: #25d366; display: flex; align-items: center; justify-content: center; box-shadow: 0 8px 24px rgba(37, 211, 102, .5); animation: waPulse 2.4s infinite; }
@keyframes waPulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.08); } }

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 980px) {
  .cards, .steps, .gallery { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 4rem; }
  .split-img-float { left: auto; right: -.5rem; }
}
@media (max-width: 680px) {
  .nav-toggle { display: block; }
  .nav-links { position: fixed; inset: 0 0 auto 0; top: 62px; background: rgba(11,21,38,.98); flex-direction: column; padding: 1.6rem; gap: 1.2rem; display: none; }
  .nav-links.open { display: flex; }
  .nav { background: rgba(11,21,38,.96); }
  .cards, .steps, .gallery { grid-template-columns: 1fr; }
  .gallery img { aspect-ratio: 4 / 3; }
  .footer-inner { flex-direction: column; }
}