/*
Theme Name: Panrui Screw
Theme URI: https://panruiscrew.com
Author: Panrui
Author URI: https://panruiscrew.com
Description: High-end, bright industrial screw compressor theme built for Panrui. Light-blue primary palette, B2B product catalog, lead generation and SEO-ready.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: panrui-screw
Tags: business, e-commerce, custom-menu, featured-images, block-styles, wide-blocks, custom-logo
*/

:root {
  --pr-violet: #0ea5e9;
  --pr-violet-dark: #0369a1;
  --pr-violet-deep: #0b3a5c;
  --pr-violet-soft: #e8f5fd;
  --pr-lavender: #7dd3fc;
  --pr-gold: #f5b941;
  --pr-cyan: #38bdf8;
  --pr-ink: #14263b;
  --pr-slate: #5b6474;
  --pr-mist: #f5fafd;
  --pr-white: #ffffff;
  --pr-line: #e1eef7;
  --pr-shadow: 0 20px 60px rgba(2, 55, 90, 0.12);
  --pr-shadow-sm: 0 10px 30px rgba(3, 105, 161, 0.10);
  --pr-radius: 18px;
  --pr-radius-sm: 12px;
  --pr-container: 1240px;
  --pr-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--pr-font);
  color: var(--pr-ink);
  background: var(--pr-white);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--pr-violet); text-decoration: none; }
a:hover { color: var(--pr-violet-dark); }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 16px;
  line-height: 1.2;
  color: var(--pr-ink);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(40px, 6vw, 72px); }
h2 { font-size: clamp(30px, 4vw, 46px); }
h3 { font-size: clamp(22px, 2.6vw, 30px); }
h4 { font-size: 20px; }

p { margin: 0 0 18px; }

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

.section { padding: 88px 0; }
.section-head { max-width: 760px; margin: 0 auto 48px; text-align: center; }
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--pr-violet-soft);
  color: var(--pr-violet-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-head p { color: var(--pr-slate); margin: 14px auto 0; max-width: 620px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 26px;
  border-radius: 999px;
  border: 2px solid transparent;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--pr-violet); color: #fff; box-shadow: 0 14px 30px rgba(14, 165, 233, 0.28); }
.btn-primary:hover { background: var(--pr-violet-dark); color: #fff; }
.btn-light { background: #fff; color: var(--pr-violet-dark); border-color: #fff; }
.btn-light:hover { background: var(--pr-violet-soft); border-color: var(--pr-violet-soft); }
.btn-outline { background: transparent; color: var(--pr-violet-dark); border-color: var(--pr-violet); }
.btn-outline:hover { background: var(--pr-violet); color: #fff; }
.btn-gold { background: var(--pr-gold); color: var(--pr-ink); }
.btn-gold:hover { background: #f0a71b; color: var(--pr-ink); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 9999;
  background: #fff; color: var(--pr-violet-dark); padding: 10px 16px; border-radius: 8px;
}
.skip-link:focus { left: 16px; top: 16px; }

/* Header */
.site-topbar {
  background: var(--pr-violet-deep);
  color: #fff;
  font-size: 13px;
  padding: 8px 0;
}
.site-topbar .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.topbar-links { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.topbar-links a { color: #dbeafe; }
.topbar-links a:hover { color: #fff; }
.topbar-social { display: flex; gap: 12px; }
.topbar-social a { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: rgba(255,255,255,.12); color: #fff; }
.topbar-social a:hover { background: var(--pr-gold); color: var(--pr-ink); }

.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--pr-line);
  backdrop-filter: blur(14px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 78px; gap: 20px; }
.site-brand { display: inline-flex; align-items: center; gap: 10px; }
.site-brand img { max-height: 52px; width: auto; }
.site-title { font-size: 22px; font-weight: 900; letter-spacing: -0.03em; color: var(--pr-ink); margin: 0; }
.site-title span { color: var(--pr-violet); }

.main-navigation ul {
  list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 4px;
}
.main-navigation li { position: relative; }
.main-navigation a {
  display: block; padding: 12px 13px; color: var(--pr-ink); font-weight: 700; font-size: 15px; border-radius: 999px;
}
.main-navigation a:hover, .main-navigation .current-menu-item > a { color: var(--pr-violet); background: var(--pr-violet-soft); }
.main-navigation .sub-menu {
  display: none; position: absolute; left: 0; top: calc(100% + 6px); min-width: 230px;
  background: #fff; border: 1px solid var(--pr-line); border-radius: 14px; box-shadow: var(--pr-shadow); padding: 8px;
}
.main-navigation li:hover > .sub-menu, .main-navigation li:focus-within > .sub-menu { display: block; }
.main-navigation .sub-menu li { width: 100%; }
.main-navigation .sub-menu a { padding: 10px 12px; border-radius: 9px; font-size: 14px; }

.header-cta { display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; width: 46px; height: 46px; border: 0; border-radius: 12px; background: var(--pr-violet-soft); color: var(--pr-violet-dark); font-size: 22px; cursor: pointer; }

/* Hero */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background: linear-gradient(120deg, #0b3a5c 0%, #0ea5e9 55%, #38bdf8 100%);
}
.hero::after {
  content: ""; position: absolute; inset: auto -8% -40% 40%; width: 620px; height: 620px;
  background: radial-gradient(circle, rgba(56,189,248,.34), transparent 68%);
}
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto auto; width: 540px; height: 540px;
  background: radial-gradient(circle, rgba(56,189,248,.32), transparent 66%);
}
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 48px; min-height: 680px; padding: 80px 0; }
.hero-copy { max-width: 690px; }
.hero h1 { color: #fff; margin-bottom: 22px; }
.hero p.lead { color: #e6f4fc; font-size: 19px; margin-bottom: 30px; max-width: 620px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px 20px; margin-top: 34px; color: #fff; font-weight: 700; }
.hero-points span { display: inline-flex; align-items: center; gap: 8px; }
.hero-visual { display: flex; justify-content: center; }
.hero-visual img { max-height: 520px; width: auto; border-radius: 28px; box-shadow: 0 30px 80px rgba(0,0,0,.25); }
.hero-badge {
  position: absolute; right: 26px; bottom: 24px; z-index: 2; background: #fff; color: var(--pr-violet-dark);
  border-radius: 16px; padding: 14px 18px; box-shadow: var(--pr-shadow); max-width: 260px;
}
.hero-badge strong { display: block; font-size: 20px; }

/* Stats */
.stats { background: var(--pr-mist); border-top: 1px solid var(--pr-line); border-bottom: 1px solid var(--pr-line); padding: 30px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-number { font-size: 34px; font-weight: 900; color: var(--pr-violet); letter-spacing: -0.03em; }
.stat-label { color: var(--pr-slate); font-weight: 700; }

/* Generic grids */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

.card {
  position: relative; background: #fff; border: 1px solid var(--pr-line); border-radius: var(--pr-radius);
  overflow: hidden; box-shadow: var(--pr-shadow-sm); transition: transform .22s ease, box-shadow .22s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--pr-shadow); }
.card-media { aspect-ratio: 4/3; overflow: hidden; background: var(--pr-mist); }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.card:hover .card-media img { transform: scale(1.06); }
.card-body { padding: 20px 20px 24px; }
.card-title { font-size: 19px; margin-bottom: 10px; }
.card-title a { color: var(--pr-ink); }
.card-title a:hover { color: var(--pr-violet); }
.card-text { color: var(--pr-slate); font-size: 15px; margin: 0 0 16px; }
.card-link { font-weight: 800; font-size: 14px; }

/* Product cards */
.product-card .card-media { background: #fff; }
.product-tag { position: absolute; top: 14px; left: 14px; z-index: 2; background: var(--pr-gold); color: var(--pr-ink); font-size: 12px; font-weight: 800; padding: 6px 10px; border-radius: 999px; }

/* Split */
.split { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 60px; }
.split-media { position: relative; }
.split-media img { border-radius: var(--pr-radius); box-shadow: var(--pr-shadow); }
.split-media .floating-card { position: absolute; left: -24px; bottom: 26px; background: #fff; border-radius: 16px; padding: 18px 20px; box-shadow: var(--pr-shadow); display: flex; align-items: center; gap: 14px; }
.check-list { list-style: none; padding: 0; margin: 22px 0 28px; display: grid; gap: 12px; }
.check-list li { display: flex; gap: 10px; align-items: flex-start; font-weight: 600; }
.check-list li::before { content: "✓"; flex: 0 0 auto; width: 24px; height: 24px; display: grid; place-items: center; border-radius: 50%; background: var(--pr-violet-soft); color: var(--pr-violet-dark); font-weight: 900; }

/* Industry tiles */
.industry-card { text-align: center; padding: 26px 16px; }
.industry-icon { width: 58px; height: 58px; display: grid; place-items: center; margin: 0 auto 16px; border-radius: 18px; background: var(--pr-violet-soft); color: var(--pr-violet-dark); font-size: 26px; }
.industry-card h3 { font-size: 17px; margin: 0; }

/* Why us */
.why-us { background: var(--pr-violet-deep); color: #fff; position: relative; overflow: hidden; }
.why-us::before { content: ""; position: absolute; inset: -50% -10% auto auto; width: 620px; height: 620px; background: radial-gradient(circle, rgba(56,189,248,.45), transparent 65%); }
.why-us .container { position: relative; z-index: 1; }
.why-us h2, .why-us h3 { color: #fff; }
.why-item { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14); border-radius: var(--pr-radius); padding: 28px; backdrop-filter: blur(8px); }
.why-item h3 { font-size: 20px; }
.why-item p { color: #dbeafe; margin: 0; }

/* CTA band */
.cta-band {
  background: linear-gradient(120deg, var(--pr-violet), var(--pr-violet-dark));
  color: #fff; border-radius: 28px; padding: 46px; display: grid; grid-template-columns: 1.2fr .8fr; align-items: center; gap: 30px;
}
.cta-band h2 { color: #fff; margin-bottom: 8px; }
.cta-band p { color: #e6f4fc; margin: 0; }
.cta-band .btn { justify-self: end; }

/* FAQ */
.faq-list { max-width: 860px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--pr-line); border-radius: var(--pr-radius-sm); background: #fff; overflow: hidden; }
.faq-question { width: 100%; border: 0; background: #fff; padding: 20px 24px; text-align: left; font-size: 17px; font-weight: 800; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px; color: var(--pr-ink); }
.faq-question::after { content: "+"; font-size: 26px; color: var(--pr-violet); }
.faq-item.open .faq-question::after { content: "–"; }
.faq-answer { display: none; padding: 0 24px 22px; color: var(--pr-slate); }
.faq-item.open .faq-answer { display: block; }

/* Forms */
.lead-form { background: #fff; border: 1px solid var(--pr-line); border-radius: var(--pr-radius); padding: 26px; box-shadow: var(--pr-shadow-sm); }
.lead-form input, .lead-form textarea, .lead-form select {
  width: 100%; border: 1px solid var(--pr-line); background: var(--pr-mist); border-radius: 12px;
  padding: 13px 14px; font: inherit; color: var(--pr-ink); margin-bottom: 12px;
}
.lead-form input:focus, .lead-form textarea:focus, .lead-form select:focus { outline: 3px solid rgba(14,165,233,.20); border-color: var(--pr-violet); }
.lead-form button { width: 100%; }
.contact-lines { display: grid; gap: 14px; margin-top: 20px; }
.contact-lines a { color: var(--pr-ink); font-weight: 700; }

/* Page hero */
.page-hero { background: linear-gradient(120deg, var(--pr-violet-deep), var(--pr-violet)); color: #fff; padding: 76px 0; text-align: center; }
.page-hero h1 { color: #fff; }
.breadcrumbs { color: #dbeafe; font-size: 14px; margin-top: 10px; }
.breadcrumbs a { color: #fff; }

/* Footer */
.site-footer { background: #0b3a5c; color: #cfe4f5; }
.footer-main { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.2fr; gap: 40px; padding: 70px 0 48px; }
.footer-main h4 { color: #fff; margin-bottom: 18px; font-size: 17px; }
.footer-main ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-main a { color: #cfe4f5; }
.footer-main a:hover { color: var(--pr-gold); }
.footer-about p { color: #9fc6e8; }
.footer-social { display: flex; gap: 10px; margin-top: 22px; }
.footer-social a { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; background: rgba(255,255,255,.08); color: #fff; }
.footer-social a:hover { background: var(--pr-gold); color: var(--pr-ink); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.10); padding: 20px 0; font-size: 14px; color: #8fb6d6; }
.footer-bottom .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-bottom a { color: #cfe4f5; }

/* Single / archive */
.entry-content { max-width: 840px; margin: 0 auto; }
.entry-content h2, .entry-content h3 { margin-top: 34px; }
.post-meta { color: var(--pr-slate); font-size: 14px; margin-bottom: 18px; }
.product-single { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.product-gallery img { border-radius: var(--pr-radius); }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 20px; }
.spec-table th, .spec-table td { padding: 12px 14px; border: 1px solid var(--pr-line); text-align: left; }
.spec-table th { background: var(--pr-violet-soft); color: var(--pr-violet-dark); }

/* Mobile */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; min-height: auto; text-align: center; }
  .hero-copy, .hero p.lead { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-points { justify-content: center; }
  .split, .product-single, .cta-band, .footer-main { grid-template-columns: 1fr; }
  .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .header-cta .btn { display: none; }
  .nav-toggle { display: grid; place-items: center; }
  .main-navigation { position: fixed; inset: 0; background: #fff; padding: 100px 24px 24px; display: none; z-index: 999; overflow-y: auto; }
  .main-navigation.active { display: block; }
  .main-navigation ul { flex-direction: column; align-items: stretch; gap: 4px; }
  .main-navigation .sub-menu { display: none; position: static; box-shadow: none; border: 0; padding-left: 12px; }
  .main-navigation li.open > .sub-menu { display: block; }
}
@media (max-width: 640px) {
  .grid-3, .grid-4, .grid-5, .grid-2, .stats-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .hero-inner { padding: 56px 0; }
  .site-topbar .topbar-links { justify-content: center; }
  .cta-band .btn { justify-self: stretch; }
}


/* Optimization: trust, stories, quick quote and floating inquiry */
.trust-signals { background: #fff; }
.trust-grid { align-items: stretch; }
.trust-item { background: #fff; border: 1px solid var(--pr-line); border-radius: var(--pr-radius); padding: 30px 26px; box-shadow: var(--pr-shadow-sm); transition: transform .22s ease, box-shadow .22s ease; }
.trust-item:hover { transform: translateY(-6px); box-shadow: var(--pr-shadow); }
.trust-item h3 { font-size: 20px; margin-top: 18px; }
.trust-item p { color: var(--pr-slate); margin: 0; }

.section-actions { text-align: center; margin-top: 36px; }
.story-card .card-body { min-height: 210px; display: flex; flex-direction: column; }
.story-card .card-text { flex: 1; }

.quick-quote { background: linear-gradient(120deg, var(--pr-violet-soft), #ffffff 68%); }
.quick-quote-grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 48px; align-items: center; }
.quick-quote-copy h2 { margin-bottom: 16px; }
.quick-quote-form .lead-form { padding: 30px; }

.floating-whatsapp { position: fixed; right: 22px; bottom: 22px; z-index: 1200; width: 58px; height: 58px; display: grid; place-items: center; border-radius: 50%; background: #25d366; color: #fff; font-size: 30px; box-shadow: 0 16px 40px rgba(0,0,0,.22); transition: transform .2s ease, box-shadow .2s ease; }
.floating-whatsapp:hover { transform: translateY(-4px) scale(1.04); color: #fff; box-shadow: 0 20px 50px rgba(0,0,0,.28); }

@media (max-width: 900px) {
  .quick-quote-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .floating-whatsapp { right: 16px; bottom: 16px; width: 52px; height: 52px; font-size: 27px; }
}