:root {
  --c-primary-dark: #0a2540;
  --c-primary: #0d3b66;
  --c-primary-mid: #1565c0;
  --c-accent: #00bcd4;
  --c-accent-light: #48cae4;
  --c-white: #ffffff;
  --c-bg: #f0f6fc;
  --c-bg2: #e8f0f6;
  --c-text: #1a2a3e;
  --c-text-muted: #5a7088;
  --c-border: #d0dce8;
  --shadow-sm: 0 2px 10px rgba(10,37,64,0.08);
  --shadow-md: 0 6px 24px rgba(10,37,64,0.12);
  --shadow-lg: 0 16px 48px rgba(10,37,64,0.16);
  --radius: 10px;
  --max-w: 1200px;
  --header-h: 72px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: "Microsoft YaHei", "PingFang SC", -apple-system, sans-serif; color: var(--c-text); line-height: 1.7; background: var(--c-white); overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-h); z-index: 1000;
  background: rgba(10,37,64,0.85);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background .4s ease, box-shadow .4s ease;
}
.site-header.scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: var(--shadow-md);
  border-bottom: 1px solid var(--c-border);
}
.header-inner {
  max-width: var(--max-w); margin: 0 auto;
  height: 100%; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo-area { display: flex; align-items: center; gap: 12px; cursor: pointer; }
.logo-area img { height: 40px; width: auto; }
.logo-text { display: flex; flex-direction: column; align-items: center; text-align: center; line-height: 1.2; }
.logo-text .cn { font-size: 18px; font-weight: 700; color: #fff; letter-spacing: 1px; transition: color .4s; }
.logo-text .en { font-size: 10px; color: var(--c-accent-light); letter-spacing: 2px; text-transform: uppercase; transition: color .4s; }
.site-header.scrolled .logo-text .cn { color: var(--c-primary-dark); }
.site-header.scrolled .logo-text .en { color: var(--c-primary-mid); }
.nav-area { display: flex; align-items: center; gap: 4px; }
.nav-area a {
  padding: 8px 16px; font-size: 15px; color: rgba(255,255,255,0.85);
  border-radius: 6px; transition: all .3s; font-weight: 500;
}
.nav-area a:hover, .nav-area a.active {
  color: var(--c-accent); background: rgba(0,188,212,0.1);
}
.site-header.scrolled .nav-area a { color: var(--c-text); }
.site-header.scrolled .nav-area a:hover, .site-header.scrolled .nav-area a.active {
  color: var(--c-primary-mid); background: rgba(21,101,192,0.08);
}
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: all .3s; }
.site-header.scrolled .nav-toggle span { background: var(--c-primary-dark); }
.header-right { display: flex; align-items: center; gap: 12px; }
.lang-toggle {
  padding: 6px 14px; font-size: 13px; font-weight: 600;
  color: rgba(255,255,255,0.9); border: 1px solid rgba(255,255,255,0.3);
  border-radius: 20px; transition: all .3s; white-space: nowrap; cursor: pointer;
}
.lang-toggle:hover { color: var(--c-accent); border-color: var(--c-accent); background: rgba(0,188,212,0.1); }
.site-header.scrolled .lang-toggle { color: var(--c-primary); border-color: rgba(13,59,102,0.3); }
.site-header.scrolled .lang-toggle:hover { color: var(--c-accent); border-color: var(--c-accent); }

/* Hero */
.hero { position: relative; height: 92vh; min-height: 580px; max-height: 940px; overflow: hidden; background: var(--c-primary-dark); }
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
  position: absolute; inset: 0; opacity: 0;
  background-size: cover; background-position: center; background-repeat: no-repeat;
  transition: opacity 1.2s ease-in-out;
  transform: scale(1.05);
}
.hero-slide.active { opacity: 1; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(10,37,64,0.75) 0%, rgba(13,59,102,0.6) 50%, rgba(21,101,192,0.4) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  max-width: var(--max-w); margin: 0 auto;
  padding: 0 24px; height: 100%;
  display: flex; flex-direction: column; justify-content: center;
  color: #fff;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 18px;
  background: rgba(0,188,212,0.15); border: 1px solid rgba(0,188,212,0.4);
  border-radius: 20px; font-size: 13px; color: var(--c-accent-light);
  letter-spacing: 1px; width: fit-content; margin-bottom: 24px;
}
.hero h1 { font-size: 52px; font-weight: 800; line-height: 1.3; margin-bottom: 20px; max-width: 700px; }
.hero h1 .accent { color: var(--c-accent); }
.hero-sub { font-size: 17px; line-height: 1.8; color: rgba(255,255,255,0.8); max-width: 600px; margin-bottom: 36px; }
.hero-btns { display: flex; gap: 16px; }
.btn {
  padding: 14px 36px; border-radius: 8px; font-size: 15px; font-weight: 600;
  transition: all .3s; cursor: pointer; border: none; display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary { background: linear-gradient(135deg, var(--c-accent), var(--c-primary-mid)); color: #fff; box-shadow: 0 4px 20px rgba(0,188,212,0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 28px rgba(0,188,212,0.45); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.4); }
.btn-outline:hover { border-color: var(--c-accent); background: rgba(0,188,212,0.1); }
.hero-dots { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 3; }
.hero-dots .dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.3); cursor: pointer; transition: all .3s; }
.hero-dots .dot.active { background: var(--c-accent); width: 30px; border-radius: 5px; }
.hero-scroll { position: absolute; bottom: 20px; right: 24px; color: rgba(255,255,255,0.5); font-size: 12px; z-index: 3; writing-mode: vertical-rl; letter-spacing: 2px; }
.hero-scroll .arrow { display: block; text-align: center; margin-top: 8px; animation: bounce 2s infinite; }
@keyframes bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(8px); } }

/* Sub Page Banner */
.page-banner {
  position: relative;
  min-height: 360px;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--c-primary-dark) 0%, var(--c-primary) 50%, var(--c-primary-mid) 100%);
  overflow: hidden;
  margin-top: var(--header-h);
}
.page-banner::before {
  content: ''; position: absolute; top: -30%; right: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0,188,212,0.12), transparent 70%);
  border-radius: 50%;
}
.page-banner::after {
  content: ''; position: absolute; bottom: -20%; left: -10%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,188,212,0.08), transparent 70%);
  border-radius: 50%;
}
.page-banner-content { position: relative; z-index: 1; }
.page-banner h1 { font-size: 40px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.page-banner .breadcrumb { font-size: 14px; color: rgba(255,255,255,0.6); }
.page-banner .breadcrumb a { color: rgba(255,255,255,0.6); transition: color .3s; }
.page-banner .breadcrumb a:hover { color: var(--c-accent-light); }

/* Stats Bar */
.stats-bar { background: var(--c-primary-dark); padding: 48px 0; }
.stats-inner { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; text-align: center; }
.stat-item .stat-num { font-size: 42px; font-weight: 800; color: var(--c-accent-light); line-height: 1; margin-bottom: 8px; }
.stat-item .stat-num .unit { font-size: 18px; font-weight: 400; }
.stat-item .stat-label { font-size: 14px; color: rgba(255,255,255,0.6); letter-spacing: 1px; }

/* Section Common */
.section { padding: 80px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head .eyebrow { font-size: 14px; color: var(--c-accent); letter-spacing: 3px; text-transform: uppercase; font-weight: 600; margin-bottom: 12px; }
.section-head h2 { font-size: 36px; font-weight: 700; color: var(--c-primary-dark); margin-bottom: 16px; }
.section-head h2::after { content: ''; display: block; width: 60px; height: 3px; background: linear-gradient(90deg, var(--c-primary-mid), var(--c-accent)); margin: 12px auto 0; border-radius: 2px; }
.section-head p { font-size: 16px; color: var(--c-text-muted); max-width: 700px; margin: 0 auto; }

/* About */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-text p { font-size: 15px; line-height: 2; color: var(--c-text-muted); margin-bottom: 16px; text-indent: 2em; }
.about-text p strong { color: var(--c-text); }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }
.about-feature { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--c-text); }
.about-feature .check { width: 22px; height: 22px; background: var(--c-accent); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 12px; flex-shrink: 0; }
.about-image { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-image img { width: 100%; height: 400px; object-fit: cover; }
.about-badge { position: absolute; bottom: 20px; left: 20px; right: 20px; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); padding: 16px 20px; border-radius: 8px; display: flex; align-items: center; gap: 16px; }
.about-badge .badge-num { font-size: 28px; font-weight: 800; color: var(--c-primary-mid); }
.about-badge .badge-text { font-size: 13px; color: var(--c-text-muted); }

/* Article (sub-page content) */
.article { padding: 80px 0; }
.article-body { max-width: 900px; margin: 0 auto; font-size: 16px; line-height: 2; color: var(--c-text-muted); }
.article-body p { margin-bottom: 20px; text-indent: 2em; }
.article-body p strong { color: var(--c-text); }
.article-body img { width: 100%; border-radius: var(--radius); margin: 24px 0; box-shadow: var(--shadow-sm); }
.article-body h3 { font-size: 22px; color: var(--c-primary-dark); margin: 32px 0 16px; font-weight: 700; }
.article-body ul { list-style: none; margin: 16px 0; padding-left: 0; }
.article-body ul li { padding: 8px 0 8px 28px; position: relative; font-size: 15px; color: var(--c-text-muted); }
.article-body ul li::before { content: ''; position: absolute; left: 0; top: 16px; width: 8px; height: 8px; background: var(--c-accent); border-radius: 50%; }

/* Features (service page) */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: #fff; padding: 32px 24px; border-radius: var(--radius); border: 1px solid var(--c-border); transition: all .3s; }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--c-accent); }
.feature-icon { width: 56px; height: 56px; background: linear-gradient(135deg, var(--c-primary), var(--c-primary-mid)); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: #fff; margin-bottom: 20px; }
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h3 { font-size: 18px; color: var(--c-primary-dark); margin-bottom: 12px; font-weight: 600; }
.feature-card p { font-size: 14px; color: var(--c-text-muted); line-height: 1.8; }

.about-content h3 { font-size: 22px; color: var(--c-primary-dark); margin-bottom: 16px; font-weight: 700; }
.about-content p { font-size: 15px; line-height: 2; color: var(--c-text-muted); margin-bottom: 16px; }
.about-content ul, .about-content ol { margin: 16px 0 16px 20px; padding-left: 0; }
.about-content li { padding: 8px 0 8px 28px; position: relative; font-size: 15px; color: var(--c-text-muted); }
.about-content ul li::before, .about-content ol li::before { content: ''; position: absolute; left: 0; top: 16px; width: 8px; height: 8px; background: var(--c-accent); border-radius: 50%; }
.about-img { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-img img { width: 100%; height: 400px; object-fit: cover; }
.img-caption { font-size: 13px; color: var(--c-text-muted); text-align: center; margin-top: 12px; font-style: italic; }

.contact-card { background: #fff; padding: 40px; border-radius: var(--radius); border: 1px solid var(--c-border); box-shadow: var(--shadow-sm); }
.contact-card h3 { font-size: 22px; color: var(--c-primary-dark); margin-bottom: 24px; font-weight: 700; }
.contact-card p { font-size: 15px; color: var(--c-text-muted); margin-bottom: 14px; }
.contact-card p strong { color: var(--c-text); }


/* Products */
.products-section { background: var(--c-bg); }
.product-category { margin-bottom: 48px; }
.product-category:last-child { margin-bottom: 0; }
.category-title {
  font-size: 22px; font-weight: 700; color: var(--c-primary-dark);
  margin-bottom: 24px; padding-bottom: 12px;
  border-bottom: 2px solid var(--c-accent); display: inline-block;
}
.products-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: all .4s; cursor: pointer;
  border: 1px solid var(--c-border);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--c-accent); }
.product-card .product-img { height: 200px; overflow: hidden; background: var(--c-bg2); }
.product-card .product-img img { width: 100%; height: 100%; object-fit: contain; padding: 16px; transition: transform .4s; }
.product-card:hover .product-img img { transform: scale(1.08); }
.product-card .product-info { padding: 20px; }
.product-card .product-cat { font-size: 12px; color: var(--c-accent); letter-spacing: 1px; margin-bottom: 6px; }
.product-card h3 { font-size: 17px; font-weight: 600; color: var(--c-text); margin-bottom: 8px; }
.product-card p { font-size: 13px; color: var(--c-text-muted); line-height: 1.6; }
.product-card .product-more { margin-top: 12px; font-size: 13px; color: var(--c-primary-mid); font-weight: 500; display: inline-flex; align-items: center; gap: 4px; transition: gap .3s; }
.product-card:hover .product-more { gap: 10px; }

/* Advantages */
.adv-section { background: linear-gradient(135deg, var(--c-primary-dark) 0%, var(--c-primary) 100%); color: #fff; position: relative; overflow: hidden; }
.adv-section::before { content: ''; position: absolute; top: -50%; right: -10%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(0,188,212,0.08), transparent 70%); border-radius: 50%; }
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; z-index: 1; }
.adv-card { text-align: center; padding: 32px 20px; border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.1); transition: all .4s; }
.adv-card:hover { background: rgba(0,188,212,0.08); border-color: rgba(0,188,212,0.3); transform: translateY(-6px); }
.adv-icon { width: 64px; height: 64px; margin: 0 auto 20px; background: linear-gradient(135deg, rgba(21,101,192,0.3), rgba(0,188,212,0.3)); border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 30px; }
.adv-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 12px; }
.adv-card p { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 1.6; }

/* News */
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.news-item { display: flex; gap: 20px; padding: 20px; border-radius: var(--radius); border: 1px solid var(--c-border); background: #fff; transition: all .3s; }
.news-item:hover { box-shadow: var(--shadow-md); border-color: var(--c-accent); transform: translateX(4px); }
.news-date { flex-shrink: 0; width: 70px; text-align: center; }
.news-date .day { font-size: 32px; font-weight: 800; color: var(--c-primary-mid); line-height: 1; }
.news-date .month { font-size: 12px; color: var(--c-text-muted); margin-top: 4px; }
.news-content h3 { font-size: 16px; font-weight: 600; color: var(--c-text); margin-bottom: 8px; transition: color .3s; }
.news-item:hover .news-content h3 { color: var(--c-primary-mid); }
.news-content p { font-size: 13px; color: var(--c-text-muted); line-height: 1.6; }
.news-list { max-width: 900px; margin: 0 auto; }
.news-list-item { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; border-bottom: 1px solid var(--c-border); transition: all .3s; }
.news-list-item:hover { background: var(--c-bg); padding-left: 32px; }
.news-list-item .news-title { font-size: 16px; color: var(--c-text); transition: color .3s; }
.news-list-item:hover .news-title { color: var(--c-primary-mid); }
.news-list-item .news-date-text { font-size: 14px; color: var(--c-text-muted); flex-shrink: 0; margin-left: 20px; }
.news-tag { flex-shrink: 0; font-size: 12px; padding: 3px 10px; border-radius: 4px; margin-right: 14px; font-weight: 600; letter-spacing: .5px; }
.news-tag展会 { background: rgba(0,188,212,.12); color: var(--c-accent); }
.news-tag公司 { background: rgba(21,101,192,.12); color: var(--c-primary-mid); }

/* CTA */
.cta-banner { background: linear-gradient(135deg, var(--c-primary), var(--c-primary-mid)); padding: 60px 0; text-align: center; position: relative; overflow: hidden; }
.cta-banner::before { content: ''; position: absolute; top: -30px; left: -30px; width: 200px; height: 200px; background: radial-gradient(circle, rgba(0,188,212,0.15), transparent 70%); border-radius: 50%; }
.cta-banner::after { content: ''; position: absolute; bottom: -40px; right: -20px; width: 300px; height: 300px; background: radial-gradient(circle, rgba(0,188,212,0.1), transparent 70%); border-radius: 50%; }
.cta-banner h2 { font-size: 30px; font-weight: 700; color: #fff; margin-bottom: 12px; position: relative; z-index: 1; }
.cta-banner p { font-size: 16px; color: rgba(255,255,255,0.7); margin-bottom: 32px; position: relative; z-index: 1; }
.cta-banner .btn { position: relative; z-index: 1; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: stretch; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-icon { width: 48px; height: 48px; background: linear-gradient(135deg, var(--c-primary), var(--c-primary-mid)); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; color: #fff; flex-shrink: 0; }
.contact-item .ci-label { font-size: 13px; color: var(--c-text-muted); margin-bottom: 2px; }
.contact-item .ci-value { font-size: 16px; color: var(--c-text); font-weight: 500; }
.contact-map { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); min-height: 320px; }
.contact-map iframe { width: 100%; height: 100%; min-height: 320px; border: 0; }

/* Form (Message page) */
.form-section { padding: 80px 0; }
.form-wrap { max-width: 700px; margin: 0 auto; background: #fff; padding: 48px; border-radius: var(--radius); box-shadow: var(--shadow-md); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; color: var(--c-text); margin-bottom: 6px; font-weight: 500; }
.form-group label .required { color: #d63031; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px; border: 1px solid var(--c-border); border-radius: 8px;
  font-size: 15px; color: var(--c-text); font-family: inherit; transition: border-color .3s, box-shadow .3s;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(0,188,212,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-radio-group { display: flex; gap: 24px; align-items: center; }
.form-radio-group label { display: flex; align-items: center; gap: 6px; margin: 0; cursor: pointer; font-weight: 400; }
.form-radio-group input[type="radio"] { width: auto; }
.form-submit { width: 100%; padding: 16px; font-size: 16px; margin-top: 8px; }

/* Footer */
.site-footer { background: linear-gradient(135deg, var(--c-primary-dark) 0%, #071528 100%); color: rgba(255,255,255,0.55); padding: 64px 0 0; }
.footer-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .flogo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand .flogo img { height: 36px; }
.footer-brand .flogo span { font-size: 16px; color: #fff; font-weight: 700; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-bottom: 16px; }
.footer-col h4 { font-size: 15px; color: #fff; margin-bottom: 20px; font-weight: 600; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.55); transition: color .3s; }
.footer-col ul li a:hover { color: var(--c-accent-light); }
.footer-bottom { padding: 24px 0; text-align: center; font-size: 13px; }
.footer-bottom a { color: rgba(255,255,255,0.55); transition: color .3s; }
.footer-bottom a:hover { color: var(--c-accent-light); }

/* Reveal Animation */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 968px) {
  .nav-area { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(10,37,64,0.97); flex-direction: column; padding: 16px; gap: 0; }
  .nav-area.open { display: flex; }
  .nav-area a { padding: 12px 16px; width: 100%; border-bottom: 1px solid rgba(255,255,255,0.08); border-radius: 0; }
  .nav-toggle { display: flex; }
  .lang-toggle { padding: 4px 10px; font-size: 12px; }
  .hero { height: 70vh; min-height: 400px; max-height: 600px; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 15px; }
  .stats-inner { grid-template-columns: repeat(2,1fr); gap: 32px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr 1fr; }
  .adv-grid { grid-template-columns: repeat(2,1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .section-head h2, .page-banner h1 { font-size: 28px; }
  .form-row { grid-template-columns: 1fr; }
  .form-wrap { padding: 24px; }
}
@media (max-width: 600px) {
  .products-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
}

/* ===== 禁止复制下载 ===== */
body {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
/* 输入框和文本域允许选择 */
input, textarea, select {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}
/* 图片禁止拖拽 */
img {
  -webkit-user-drag: none;
  -webkit-touch-callout: none;
  pointer-events: auto;
}
/* 禁用打印 */
@media print {
  body { display: none; }
}