/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
.spa-section { scroll-margin-top: 70px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #2d3748;
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
h1, h2, h3, h4, p { margin: 0; }

:root {
  --color-primary: #1a4d8c;
  --color-primary-dark: #103765;
  --color-accent: #f5a623;
  --color-bg: #f5f7fa;
  --color-text: #2d3748;
  --color-text-muted: #8a94a6;
  --color-border: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(15, 35, 70, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 35, 70, 0.10);
  --shadow-lg: 0 16px 48px rgba(15, 35, 70, 0.16);
  --radius: 6px;
  --container: 1200px;
}

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

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  background: transparent;
  transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
  padding: 12px 0;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; flex-direction: column; line-height: 1.1; color: #fff; transition: color 0.3s; }
.brand-cn { font-size: 22px; font-weight: 700; letter-spacing: 1px; }
.brand-en { font-size: 11px; letter-spacing: 2px; opacity: 0.75; margin-top: 2px; }
.site-header.is-scrolled .brand { color: var(--color-primary); }

.main-nav { display: flex; gap: 36px; }
.main-nav a {
  position: relative;
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  padding: 8px 0;
  transition: color 0.2s;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 0;
  width: 0; height: 2px;
  background: var(--color-accent);
  transition: width 0.25s, left 0.25s;
}
.main-nav a:hover::after,
.main-nav a.active::after { width: 100%; left: 0; }
.site-header.is-scrolled .main-nav a { color: var(--color-text); }
.site-header.is-scrolled .main-nav a:hover,
.site-header.is-scrolled .main-nav a.active { color: var(--color-primary); }

.nav-toggle {
  display: none;
  width: 32px; height: 32px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s, background 0.3s;
}
.site-header.is-scrolled .nav-toggle span { background: var(--color-primary); }
body.menu-open .nav-toggle span { background: var(--color-primary); }
body.menu-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.menu-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
.mobile-nav {
  position: fixed;
  top: 0; right: 0;
  width: 280px;
  height: 100vh;
  background: #fff;
  z-index: 99;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(.4,.2,.2,1);
  padding: 80px 32px 32px;
  box-shadow: var(--shadow-lg);
}
body.menu-open .mobile-nav { transform: translateX(0); }
.mobile-nav a {
  display: block;
  padding: 16px 0;
  font-size: 17px;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}
.mobile-nav a.active { color: var(--color-primary); font-weight: 600; }
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 98;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
body.menu-open .nav-overlay { opacity: 1; pointer-events: auto; }

/* ============================================================
   Hero (homepage swiper)
   ============================================================ */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 560px;
  max-height: 800px;
}
.hero .swiper, .hero .swiper-wrapper, .hero .swiper-slide { height: 100%; }
.hero .swiper-slide {
  position: relative;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
}
.hero .swiper-slide::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(15,30,55,0.7) 0%, rgba(15,30,55,0.35) 60%, rgba(15,30,55,0.15) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  color: #fff;
  width: 100%;
}
.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(245,166,35,0.15);
  border: 1px solid rgba(245,166,35,0.5);
  color: var(--color-accent);
  font-size: 13px;
  letter-spacing: 3px;
  border-radius: 30px;
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: 2px;
  line-height: 1.15;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.35);
}
.hero-sub {
  font-size: clamp(14px, 1.5vw, 18px);
  opacity: 0.9;
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  border-radius: 4px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.hero-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(245,166,35,0.4); }
.hero .swiper-button-prev,
.hero .swiper-button-next {
  color: rgba(255,255,255,0.7);
}
.hero .swiper-button-prev:hover,
.hero .swiper-button-next:hover { color: #fff; }
.hero .swiper-pagination-bullet { background: #fff; opacity: 0.5; }
.hero .swiper-pagination-bullet-active { opacity: 1; background: var(--color-accent); width: 28px; border-radius: 4px; }

/* ============================================================
   Inner Banner (about / products / contact)
   ============================================================ */
.inner-banner {
  position: relative;
  height: 360px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 0;
}
.inner-banner::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(15,30,55,0.65) 0%, rgba(15,30,55,0.45) 100%);
}
.inner-banner-content {
  position: relative;
  z-index: 2;
  color: #fff;
  text-align: center;
}
.inner-banner-content .en {
  font-size: 14px;
  letter-spacing: 6px;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 12px;
}
.inner-banner-content .cn {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: 4px;
}
.inner-banner-content .cn::after {
  content: "";
  display: block;
  width: 50px;
  height: 3px;
  background: var(--color-accent);
  margin: 20px auto 0;
}

/* ============================================================
   Section title
   ============================================================ */
.section { padding: 90px 0; }
.section.bg-gray { background: var(--color-bg); }
.section-title { text-align: center; margin-bottom: 60px; }
.section-title .en {
  font-size: 13px;
  letter-spacing: 6px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  font-weight: 500;
}
.section-title .cn {
  font-size: 34px;
  font-weight: 700;
  color: var(--color-text);
  margin-top: 6px;
  position: relative;
  display: inline-block;
}
.section-title .cn::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background: var(--color-primary);
  margin: 16px auto 0;
}

/* ============================================================
   Intro section (homepage)
   ============================================================ */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.intro-left .en {
  font-size: 80px;
  font-weight: 800;
  color: rgba(26, 77, 140, 0.08);
  letter-spacing: 8px;
  line-height: 1;
  margin-bottom: -20px;
}
.intro-left h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}
.intro-left .divider {
  width: 50px;
  height: 3px;
  background: var(--color-primary);
  margin: 20px 0 28px;
}
.intro-left p {
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 16px;
}
.intro-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}
.intro-stat .num {
  font-size: 38px;
  font-weight: 800;
  color: var(--color-primary);
  font-feature-settings: "tnum";
}
.intro-stat .num small { font-size: 24px; color: var(--color-accent); }
.intro-stat .label {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 4px;
}
.intro-right {
  position: relative;
}
.intro-right img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.intro-right::before {
  content: "";
  position: absolute;
  inset: 24px -24px -24px 24px;
  border: 3px solid var(--color-primary);
  border-radius: var(--radius);
  z-index: -1;
}

/* ============================================================
   Equipment swiper (homepage)
   ============================================================ */
.equip-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.equip-swiper { padding: 0 0 60px; position: relative; }
.equip-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
  cursor: pointer;
}
.equip-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.equip-card .img {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.equip-card .img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.equip-card:hover .img img { transform: scale(1.06); }
.equip-card .body { padding: 22px 22px 26px; }
.equip-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}
.equip-card p {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.7;
  min-height: 44px;
}
.equip-card .more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 500;
}
.equip-swiper .swiper-button-prev,
.equip-swiper .swiper-button-next {
  color: var(--color-primary);
  top: 40%;
}
.equip-swiper .swiper-pagination { bottom: 10px; }
.equip-swiper .swiper-pagination-bullet-active { background: var(--color-primary); }

/* ============================================================
   Advantages
   ============================================================ */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.advantage-card {
  background: #fff;
  padding: 40px 28px;
  border-radius: var(--radius);
  text-align: left;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid var(--color-border);
}
.advantage-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.advantage-card .num {
  font-size: 56px;
  font-weight: 800;
  color: rgba(26, 77, 140, 0.10);
  line-height: 1;
  margin-bottom: 16px;
  transition: color 0.3s;
}
.advantage-card:hover .num { color: rgba(245, 166, 35, 0.30); }
.advantage-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}
.advantage-card p {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================================
   Factory environment grid
   ============================================================ */
.env-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.env-grid.cols-6 { grid-template-columns: repeat(3, 1fr); }
.env-card {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: var(--radius);
  cursor: pointer;
  background: #000;
}
.env-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s, opacity 0.3s;
}
.env-card:hover img { transform: scale(1.08); opacity: 0.7; }
.env-card .label {
  position: absolute;
  inset: auto 0 0 0;
  padding: 20px 16px 14px;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.7) 100%);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1px;
}

/* ============================================================
   Parts cards (homepage)
   ============================================================ */
.parts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.parts-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
}
.parts-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.parts-card .img { aspect-ratio: 4/3; overflow: hidden; }
.parts-card .img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.parts-card:hover .img img { transform: scale(1.06); }
.parts-card .body { padding: 20px 24px 24px; }
.parts-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.parts-card p { font-size: 13px; color: var(--color-text-muted); }

/* ============================================================
   About page
   ============================================================ */
.about-intro { display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center; }
.about-intro img { border-radius: var(--radius); box-shadow: var(--shadow-md); }
.about-intro h2 { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.about-intro .divider { width: 40px; height: 3px; background: var(--color-primary); margin: 18px 0 24px; }
.about-intro p { color: var(--color-text-muted); font-size: 15px; line-height: 1.9; margin-bottom: 14px; }

.philosophy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.philo-card {
  display: flex;
  gap: 24px;
  align-items: center;
  padding: 36px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
}
.philo-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.philo-icon {
  width: 64px; height: 64px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(26, 77, 140, 0.08);
  color: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}
.philo-icon svg { width: 32px; height: 32px; }
.philo-card h3 { font-size: 19px; font-weight: 600; margin-bottom: 6px; }
.philo-card p { color: var(--color-text-muted); font-size: 14px; }

/* ============================================================
   Products page
   ============================================================ */
.product-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 50px;
}
.product-tab {
  padding: 10px 24px;
  border: 1px solid var(--color-border);
  border-radius: 30px;
  font-size: 14px;
  color: var(--color-text);
  background: #fff;
  transition: all 0.2s;
}
.product-tab:hover { color: var(--color-primary); border-color: var(--color-primary); }
.product-tab.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
  cursor: pointer;
  border: 1px solid var(--color-border);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.product-card .img {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #f5f7fa;
}
.product-card .img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s;
}
.product-card:hover .img img { transform: scale(1.06); }
.product-card .body { padding: 20px 22px 24px; }
.product-card .cat {
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--color-primary);
  text-transform: uppercase;
  font-weight: 500;
}
.product-card h3 { font-size: 17px; font-weight: 600; margin: 6px 0 8px; }
.product-card p { font-size: 13px; color: var(--color-text-muted); line-height: 1.7; min-height: 44px; }
.product-card .view {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 500;
}

/* ============================================================
   Product showcase (single hero image + info)
   ============================================================ */
.product-showcase {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 50px;
  align-items: center;
}
.showcase-main {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  cursor: zoom-in;
}
.showcase-main img {
  width: 100%;
  display: block;
  transition: transform 0.5s;
}
.showcase-main:hover img { transform: scale(1.03); }
.showcase-info h3 { font-size: 26px; font-weight: 700; margin-bottom: 8px; }
.showcase-info .divider { width: 40px; height: 3px; background: var(--color-primary); margin: 18px 0 24px; }
.showcase-info p { font-size: 15px; color: var(--color-text-muted); line-height: 1.8; margin-bottom: 16px; }
.showcase-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 24px;
}
.showcase-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}
.showcase-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}
.showcase-note {
  font-size: 13px !important;
  color: var(--color-text-muted) !important;
  padding: 14px 18px;
  background: var(--color-bg);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
  cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 4px;
  cursor: default;
}
.lightbox-close {
  position: absolute;
  top: 24px; right: 24px;
  width: 44px; height: 44px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  color: #fff;
  font-size: 28px;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s;
}
.lightbox-close:hover { background: rgba(255,255,255,0.2); }

/* ============================================================
   Contact page
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}
.contact-card {
  background: #fff;
  padding: 40px 32px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid var(--color-border);
}
.contact-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.contact-icon {
  width: 64px; height: 64px;
  background: rgba(26, 77, 140, 0.08);
  color: var(--color-primary);
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex;
  align-items: center; justify-content: center;
}
.contact-icon svg { width: 28px; height: 28px; }
.contact-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.contact-card p { color: var(--color-text-muted); font-size: 15px; word-break: break-all; }

.contact-form-wrap {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 50px;
  background: #fff;
  padding: 50px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.contact-form .field { margin-bottom: 20px; }
.contact-form label {
  display: block;
  font-size: 13px;
  color: var(--color-text);
  margin-bottom: 6px;
  font-weight: 500;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.2s, background 0.2s;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
}
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-form .submit-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: var(--color-primary);
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  border-radius: 4px;
  transition: background 0.2s, transform 0.2s;
}
.contact-form .submit-btn:hover { background: var(--color-primary-dark); transform: translateY(-2px); }
.form-msg {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 4px;
  font-size: 14px;
  display: none;
}
.form-msg.show { display: block; }
.form-msg.success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.form-msg.error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

.contact-aside h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 20px;
}
.contact-aside .qr-box {
  width: 180px; height: 180px;
  background: var(--color-bg);
  border: 1px dashed var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 13px;
  margin: 16px 0 24px;
}
.contact-aside p { font-size: 14px; color: var(--color-text-muted); line-height: 1.8; }

.map-placeholder {
  margin-top: 60px;
  height: 360px;
  background: linear-gradient(135deg, #e2e8f0 0%, #f5f7fa 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 14px;
  letter-spacing: 2px;
  position: relative;
  overflow: hidden;
}
.map-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26,77,140,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26,77,140,0.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
.map-placeholder span { position: relative; z-index: 1; padding: 10px 24px; background: rgba(255,255,255,0.7); border-radius: 30px; }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: #1a2535;
  color: rgba(255,255,255,0.7);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1.5fr 0.8fr;
  gap: 50px;
  padding-bottom: 50px;
}
.footer-brand .brand { color: #fff; margin-bottom: 24px; }
.footer-form p { font-size: 13px; color: rgba(255,255,255,0.55); margin-bottom: 12px; line-height: 1.7; }
.footer-form-row { display: flex; gap: 0; }
.footer-form input {
  flex: 1;
  padding: 12px 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-right: none;
  border-radius: 4px 0 0 4px;
  color: #fff;
  font-size: 13px;
}
.footer-form input::placeholder { color: rgba(255,255,255,0.4); }
.footer-form input:focus { outline: none; border-color: var(--color-accent); }
.footer-form button {
  padding: 0 22px;
  background: var(--color-accent);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  border-radius: 0 4px 4px 0;
}
.footer-contact h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}
.footer-contact h4::after {
  content: "";
  position: absolute; left: 0; bottom: 0;
  width: 32px; height: 2px;
  background: var(--color-accent);
}
.footer-contact-row { display: flex; gap: 28px; margin-bottom: 14px; flex-wrap: wrap; }
.footer-contact-item { font-size: 13px; line-height: 1.6; }
.footer-contact-item .key { color: rgba(255,255,255,0.45); margin-bottom: 2px; }
.footer-contact-item .val { color: rgba(255,255,255,0.85); }
.footer-qr {
  text-align: center;
}
.footer-qr .box {
  width: 130px; height: 130px;
  background: rgba(255,255,255,0.08);
  border: 1px dashed rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.45);
  font-size: 12px;
  margin: 0 auto 10px;
}
.footer-qr p { font-size: 12px; color: rgba(255,255,255,0.55); }

.footer-link {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  transition: color 0.2s;
  position: relative;
  padding-right: 16px;
}
.footer-link::after {
  content: "";
  position: absolute;
  right: 8px; top: 50%;
  width: 1px; height: 12px;
  background: rgba(255,255,255,0.15);
  transform: translateY(-50%);
}
.footer-link:last-child { padding-right: 0; }
.footer-link:last-child::after { display: none; }
.footer-link:hover, .footer-link.active { color: var(--color-accent); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--color-accent); }

/* ============================================================
   Floating side bar
   ============================================================ */
.float-bar {
  position: fixed;
  right: 16px;
  bottom: 80px;
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.float-bar a, .float-bar button {
  width: 48px; height: 48px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md);
  transition: background 0.2s, transform 0.2s;
}
.float-bar a:hover, .float-bar button:hover { background: var(--color-accent); transform: translateY(-2px); }
.float-bar svg { width: 22px; height: 22px; }

/* ============================================================
   Scroll reveal
   ============================================================ */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1023px) {
  .intro-grid, .about-intro, .contact-form-wrap, .product-showcase { grid-template-columns: 1fr; gap: 40px; }
  .equip-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid, .product-grid, .env-grid, .env-grid.cols-6, .contact-grid, .parts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .philosophy { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-qr { grid-column: span 2; display: flex; gap: 32px; align-items: center; }
  .footer-qr .box { margin: 0; }
  .intro-right::before { display: none; }
}

@media (max-width: 767px) {
  .container { padding: 0 16px; }
  .section { padding: 60px 0; }
  .section-title { margin-bottom: 40px; }
  .section-title .cn { font-size: 26px; }

  .main-nav { display: none; }
  .nav-toggle { display: flex; }

  .hero { height: 70vh; min-height: 460px; }

  .inner-banner { height: 240px; }

  .equip-grid,
  .advantage-grid, .product-grid, .env-grid, .env-grid.cols-6, .contact-grid, .parts-grid {
    grid-template-columns: 1fr;
  }
  .showcase-list { grid-template-columns: 1fr; }
  .intro-stats { grid-template-columns: 1fr; gap: 16px; text-align: center; }
  .intro-left .en { font-size: 50px; }
  .intro-left h2 { font-size: 24px; }

  .contact-form-wrap { padding: 28px; }
  .footer-grid { grid-template-columns: 1fr; gap: 40px; padding-bottom: 32px; }
  .footer-qr { grid-column: auto; flex-direction: column; gap: 8px; }
  .footer-qr .box { margin: 0 auto 10px; }
  .float-bar { right: 12px; bottom: 12px; }
}