/* === 深圳越千电子材料有限公司 - Apple Style CSS === */

:root {
  --blue: #0071e3;
  --blue-light: #2997ff;
  --blue-dark: #005bb5;
  --gray-50: #f5f5f7;
  --gray-100: #e8e8ed;
  --gray-200: #d2d2d7;
  --gray-300: #a1a1a6;
  --gray-400: #86868b;
  --gray-500: #6e6e73;
  --gray-600: #515154;
  --gray-700: #3a3a3c;
  --gray-800: #1d1d1f;
  --white: #ffffff;
  --black: #000000;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.1), 0 4px 8px rgba(0,0,0,.04);
  --shadow-xl: 0 20px 48px rgba(0,0,0,.12), 0 8px 16px rgba(0,0,0,.04);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --transition: all .3s cubic-bezier(.4,0,.2,1);
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--blue); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--blue-light); }
img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 900px; margin: 0 auto; padding: 0 24px; }

/* === Navigation === */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.82); backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0,0,0,.08);
  transition: var(--transition);
}
.nav-scrolled { background: rgba(255,255,255,.96); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 52px; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo img { height: 38px; image-rendering: auto; }
.nav-logo-text { font-size: 1.25rem; font-weight: 600; color: var(--gray-800); letter-spacing: -.01em; }
.nav-links { display: flex; list-style: none; gap: 4px; }
.nav-links > li { position: relative; }
.nav-links > li > a {
  display: block; padding: 8px 14px; font-size: .85rem; color: var(--gray-600);
  border-radius: 20px; transition: var(--transition); white-space: nowrap;
}
.nav-links > li > a:hover { color: var(--blue); background: rgba(0,113,227,.06); }
.nav-links > li > a.active { color: var(--blue); }

.nav-dropdown { display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  background: var(--white); border-radius: var(--radius-lg); padding: 8px 0;
  box-shadow: var(--shadow-lg); min-width: 180px; border: 1px solid rgba(0,0,0,.06); }
.nav-links > li:hover .nav-dropdown { display: block; }
.nav-dropdown a { display: block; padding: 8px 20px; font-size: .85rem; color: var(--gray-600); white-space: nowrap; }
.nav-dropdown a:hover { color: var(--blue); background: rgba(0,113,227,.04); }

.nav-mobile-btn { display: none; background: none; border: none; font-size: 1.4rem; cursor: pointer; color: var(--gray-600); padding: 4px; }

@media (max-width: 1024px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: fixed; top: 52px; left: 0; right: 0;
    background: var(--white); padding: 12px 24px; box-shadow: var(--shadow-lg); gap: 0; }
  .nav-links > li > a { padding: 12px 0; font-size: 1rem; border-bottom: 1px solid var(--gray-100); border-radius: 0; }
  .nav-dropdown { display: none !important; }
  .nav-mobile-btn { display: block; }
}

/* === Hero Section === */
.hero {
  margin-top: 52px; min-height: 520px; display: flex; align-items: center;
  background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 50%, #dce6f0 100%);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -30%; right: -10%; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,113,227,.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-content { max-width: 600px; position: relative; z-index: 2; }
.hero-tag { display: inline-block; padding: 6px 16px; background: rgba(0,113,227,.1); color: var(--blue);
  border-radius: 20px; font-size: .8rem; font-weight: 600; margin-bottom: 20px; }
.hero h1 { font-size: 3rem; font-weight: 700; letter-spacing: -.03em; line-height: 1.15; margin-bottom: 16px; }
.hero p { font-size: 1.2rem; color: var(--gray-500); line-height: 1.7; margin-bottom: 32px; max-width: 520px; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px;
  background: var(--blue); color: var(--white); border: none; border-radius: 50px;
  font-size: .95rem; font-weight: 500; cursor: pointer; transition: var(--transition);
}
.btn-primary:hover { background: var(--blue-light); color: var(--white); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline {
  display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px;
  background: transparent; color: var(--blue); border: 1.5px solid var(--blue);
  border-radius: 50px; font-size: .95rem; font-weight: 500; cursor: pointer; transition: var(--transition);
}
.btn-outline:hover { background: rgba(0,113,227,.06); transform: translateY(-1px); }

@media (max-width: 768px) {
  .hero { min-height: 400px; padding: 60px 0; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
}

/* === Sections === */
.section { padding: 80px 0; }
.section-gray { background: var(--gray-50); }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 2.2rem; font-weight: 700; letter-spacing: -.02em; margin-bottom: 12px; }
.section-title p { color: var(--gray-400); font-size: 1.05rem; max-width: 500px; margin: 0 auto; }

/* === Brand Cards === */
.brand-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.brand-card {
  background: var(--white); border-radius: var(--radius-lg); padding: 32px 24px;
  text-align: center; box-shadow: var(--shadow-sm); transition: var(--transition);
  border: 1px solid transparent; cursor: pointer;
}
.brand-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(0,113,227,.2); }
.brand-card img { height: 48px; margin: 0 auto 16px; object-fit: contain; }
.brand-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 6px; }
.brand-card p { font-size: .85rem; color: var(--gray-400); line-height: 1.5; }

@media (max-width: 768px) { .brand-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .brand-grid { grid-template-columns: 1fr; } }

/* === Product Cards === */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  background: var(--white); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-sm); transition: var(--transition); border: 1px solid rgba(0,0,0,.04);
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.product-card-image { height: 200px; background: var(--gray-50); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.product-card-image img { max-height: 140px; object-fit: contain; }
.product-card-body { padding: 20px; }
.product-card-brand { font-size: .75rem; color: var(--blue); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 6px; }
.product-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.product-card p { font-size: .85rem; color: var(--gray-400); line-height: 1.5; }

@media (max-width: 768px) { .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .product-grid { grid-template-columns: 1fr; } }

/* === Solution Cards === */
.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card {
  background: var(--white); border-radius: var(--radius-lg); padding: 32px;
  box-shadow: var(--shadow-sm); transition: var(--transition); text-align: center; border: 1px solid transparent;
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(0,113,227,.15); }
.solution-icon { width: 56px; height: 56px; margin: 0 auto 20px; background: rgba(0,113,227,.08); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; }
.solution-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.solution-card p { font-size: .85rem; color: var(--gray-400); }

@media (max-width: 768px) { .solution-grid { grid-template-columns: 1fr; } }

/* === News Grid === */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card { display: flex; gap: 20px; padding: 20px; background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); transition: var(--transition); }
.news-card:hover { box-shadow: var(--shadow-md); }
.news-card-date { min-width: 60px; text-align: center; }
.news-card-date .day { font-size: 1.8rem; font-weight: 700; color: var(--blue); line-height: 1; }
.news-card-date .month { font-size: .75rem; color: var(--gray-400); margin-top: 4px; }
.news-card-content h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.news-card-content p { font-size: .85rem; color: var(--gray-400); line-height: 1.5; margin-bottom: 8px; }
.news-card-meta { font-size: .75rem; color: var(--gray-300); }

@media (max-width: 768px) { .news-grid { grid-template-columns: 1fr; } }

/* === Page Banner === */
.page-banner { margin-top: 52px; padding: 60px 0; background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%); text-align: center; }
.page-banner h1 { font-size: 2.5rem; font-weight: 700; letter-spacing: -.02em; margin-bottom: 8px; }
.page-banner p { color: var(--gray-400); font-size: 1rem; }

/* === About Page === */
.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-text h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 20px; letter-spacing: -.02em; }
.about-text p { color: var(--gray-500); line-height: 1.8; margin-bottom: 16px; }
.about-text .stats-row { display: flex; gap: 32px; margin-top: 24px; }
.stat-item { text-align: center; }
.stat-item .num { font-size: 2rem; font-weight: 700; color: var(--blue); display: block; }
.stat-item .label { font-size: .8rem; color: var(--gray-400); margin-top: 4px; }
.about-image img { border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); }

@media (max-width: 768px) { .about-content { grid-template-columns: 1fr; gap: 32px; } }

/* === Contact Page === */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.contact-info-item { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 28px; }
.contact-info-icon { width: 44px; height: 44px; background: rgba(0,113,227,.08); border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 1.1rem; }
.contact-info-text h4 { font-size: .95rem; font-weight: 600; margin-bottom: 4px; }
.contact-info-text p { font-size: .85rem; color: var(--gray-400); }
.contact-form { background: var(--white); padding: 36px; border-radius: var(--radius-xl); box-shadow: var(--shadow-md); }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: .85rem; font-weight: 500; margin-bottom: 6px; color: var(--gray-600); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px; border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm); font-size: .9rem; font-family: var(--font-sans);
  transition: var(--transition); background: var(--white); color: var(--gray-800);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(0,113,227,.1); }
.form-group textarea { min-height: 120px; resize: vertical; }

@media (max-width: 768px) { .contact-grid { grid-template-columns: 1fr; } }

/* === Footer === */
.footer { background: var(--gray-800); color: var(--gray-300); padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; }
.footer h4 { color: var(--white); font-size: .9rem; font-weight: 600; margin-bottom: 16px; }
.footer a { color: var(--gray-300); font-size: .85rem; display: block; margin-bottom: 8px; transition: var(--transition); }
.footer a:hover { color: var(--white); }
.footer-about p { font-size: .85rem; line-height: 1.7; }
.footer-bottom { margin-top: 36px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.08); text-align: center; font-size: .8rem; color: var(--gray-400); }

@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }

/* === FAQ === */
.faq-item { border-bottom: 1px solid var(--gray-100); padding: 18px 0; cursor: pointer; }
.faq-question { font-size: 1rem; font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .3s ease, padding .3s ease; }
.faq-answer.open { max-height: 500px; padding-top: 12px; }
.faq-answer p { font-size: .9rem; color: var(--gray-500); line-height: 1.8; }

/* === Video Card === */
.video-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.video-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); }
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.video-card video { width: 100%; aspect-ratio: 16/9; background: #000; }
.video-card-body { padding: 16px 20px; }
.video-card-body h3 { font-size: .95rem; font-weight: 600; }
.video-card-body p { font-size: .8rem; color: var(--gray-400); margin-top: 4px; }

@media (max-width: 768px) { .video-grid { grid-template-columns: 1fr; } }

/* === Case Card === */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.case-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-card-image { height: 220px; background: var(--gray-50); overflow: hidden; display: flex; align-items: center; justify-content: center; }
.case-card-image img { width: 100%; height: 100%; object-fit: cover; }
.case-card-body { padding: 20px; }
.case-tag { display: inline-block; padding: 3px 12px; background: rgba(0,113,227,.08); color: var(--blue); border-radius: 12px; font-size: .75rem; margin-bottom: 10px; }
.case-card-body h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.case-card-body p { font-size: .85rem; color: var(--gray-400); line-height: 1.5; }

@media (max-width: 768px) { .case-grid { grid-template-columns: 1fr; } }

/* === Breadcrumb === */
.breadcrumb { display: flex; gap: 8px; align-items: center; font-size: .85rem; color: var(--gray-400); margin-bottom: 32px; flex-wrap: wrap; }
.breadcrumb a { color: var(--gray-400); }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb span { color: var(--gray-500); }

/* === Filter Bar === */
.filter-bar { display: flex; gap: 10px; margin-bottom: 32px; flex-wrap: wrap; }
.filter-tag { padding: 8px 18px; border-radius: 20px; border: 1.5px solid var(--gray-200); background: var(--white); font-size: .85rem; color: var(--gray-500); cursor: pointer; transition: var(--transition); }
.filter-tag:hover, .filter-tag.active { border-color: var(--blue); color: var(--blue); background: rgba(0,113,227,.04); }

/* === Article Detail === */
.article-detail { max-width: 800px; margin: 0 auto; }
.article-detail h1 { font-size: 2rem; font-weight: 700; margin-bottom: 16px; letter-spacing: -.02em; }
.article-meta { color: var(--gray-400); font-size: .85rem; margin-bottom: 32px; padding-bottom: 20px; border-bottom: 1px solid var(--gray-100); }
.article-body { font-size: 1rem; line-height: 1.9; color: var(--gray-700); }
.article-body p { margin-bottom: 16px; }
.article-body img { border-radius: var(--radius); margin: 24px 0; }

/* === Product Detail === */
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.product-detail-image { background: var(--gray-50); border-radius: var(--radius-xl); display: flex; align-items: center; justify-content: center; min-height: 300px; padding: 40px; }
.product-detail-image img { max-height: 260px; }
.product-detail-info h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: 8px; }
.product-detail-info .brand-tag { display: inline-block; padding: 4px 14px; background: rgba(0,113,227,.08); color: var(--blue); border-radius: 12px; font-size: .8rem; font-weight: 600; margin-bottom: 16px; }
.product-detail-info .desc { color: var(--gray-500); line-height: 1.8; margin-bottom: 24px; }
.product-meta { display: flex; gap: 24px; flex-wrap: wrap; margin-bottom: 24px; }
.product-meta-item { display: flex; flex-direction: column; }
.product-meta-item .label { font-size: .75rem; color: var(--gray-400); text-transform: uppercase; letter-spacing: .05em; }
.product-meta-item .value { font-size: .9rem; font-weight: 500; }

@media (max-width: 768px) { .product-detail-grid { grid-template-columns: 1fr; } }

/* === Utility === */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-32 { margin-bottom: 32px; }
.p-0 { padding: 0; }