:root {
  --color-primary: #0ea5a4;
  --color-primary-dark: #0d9488;
  --color-primary-light: #14b8b6;
  --color-primary-50: #f0fdfa;
  --color-primary-100: #ccfbf1;
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-text-lighter: #9ca3af;
  --color-bg: #ffffff;
  --color-bg-alt: #f9fafb;
  --color-bg-alt2: #f3f4f6;
  --color-border: #e5e7eb;
  --color-white: #ffffff;
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --header-h: 64px;
  --max-w: 1200px;
  --transition: 200ms ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-stack); color: var(--color-text); background: var(--color-bg); line-height: 1.6; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
a { color: var(--color-primary-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
/* Header */
.site-header { position: sticky; top: 0; z-index: 100; height: var(--header-h); background: rgba(255,255,255,0.95); backdrop-filter: blur(8px); border-bottom: 1px solid var(--color-border); }
.site-header .container { height: 100%; display: flex; align-items: center; gap: 48px; }
.site-header .main-nav { margin-left: 0; }
.header-contact { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.header-phone { font-size: 14px; font-weight: 600; color: var(--color-primary-dark); white-space: nowrap; }
.btn-sm { padding: 6px 16px; font-size: 13px; }
.site-logo { display: flex; align-items: center; }
.site-logo img { height: 40px; width: auto; }
.site-logo .site-name { font-size: 18px; font-weight: 700; color: var(--color-primary-dark); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-text); border-radius: 2px; transition: var(--transition); }
.nav-toggle span + span { margin-top: 5px; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.main-nav ul { display: flex; gap: 28px; }
.main-nav a { font-size: 15px; color: var(--color-text); font-weight: 500; padding: 4px 0; position: relative; }
.main-nav a:hover { color: var(--color-primary-dark); }
.main-nav a.active { color: var(--color-primary-dark); border-bottom: 2px solid var(--color-primary); padding-bottom: 2px; }
.main-nav a.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 2px; background: var(--color-primary); border-radius: 2px; }
/* Hero */
.hero { background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%); color: var(--color-white); padding: 80px 0 100px; text-align: center; }
.hero h1 { font-size: 2.5rem; font-weight: 700; line-height: 1.3; margin-bottom: 20px; }
.hero p { font-size: 1.15rem; opacity: 0.92; max-width: 640px; margin: 0 auto 32px; }
.hero .cert-line { font-size: 0.9rem; opacity: 0.75; margin-top: -16px; margin-bottom: 28px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-cta .btn { min-width: 140px; }
/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 24px; border-radius: var(--radius-md); font-size: 15px; font-weight: 600; cursor: pointer; border: 2px solid transparent; transition: all var(--transition); text-align: center; }
.btn-primary { background: var(--color-white); color: var(--color-primary-dark); }
.btn-primary:hover { background: var(--color-primary-50); color: var(--color-primary-dark); }
.btn-outline { background: transparent; border-color: rgba(255,255,255,0.5); color: var(--color-white); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: white; }
.btn-light-primary { background: var(--color-primary); color: var(--color-white); }
.btn-light-primary:hover { background: var(--color-primary-dark); }
.btn-light-outline { background: transparent; border-color: var(--color-primary); color: var(--color-primary-dark); }
.btn-light-outline:hover { background: var(--color-primary-50); }
/* Page header */
.page-header { background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%); color: var(--color-white); padding: 52px 0; text-align: center; }
.page-header h1 { font-size: 2rem; font-weight: 700; margin-bottom: 10px; }
.page-header p { font-size: 1.05rem; opacity: 0.88; max-width: 580px; margin: 0 auto; }
/* Sections */
.section { padding: 64px 0; }
.section--alt { background: var(--color-bg-alt); }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 1.75rem; font-weight: 700; color: var(--color-text); margin-bottom: 8px; }
.section-title p { color: var(--color-text-light); font-size: 1.05rem; }
.section-title::after { content: ""; display: block; width: 40px; height: 3px; background: var(--color-primary); margin: 12px auto 0; border-radius: 2px; }
/* Business cards */
.biz-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 28px; }
.biz-card { background: var(--color-white); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 32px 28px; text-align: center; transition: box-shadow var(--transition), border-color var(--transition); }
.biz-card:hover { box-shadow: var(--shadow-lg); border-color: var(--color-primary-100); }
.biz-card .biz-icon { width: 56px; height: 56px; border-radius: var(--radius-md); background: var(--color-primary-50); display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; }
.biz-card .biz-icon svg { width: 28px; height: 28px; }
.biz-card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 10px; }
.biz-card p { color: var(--color-text-light); font-size: 0.95rem; }
/* Highlights */
.highlights { display: flex; justify-content: center; gap: 56px; flex-wrap: wrap; }
.highlight { text-align: center; }
.highlight .num { font-size: 2.25rem; font-weight: 700; color: var(--color-primary-dark); line-height: 1; }
.highlight .label { color: var(--color-text-light); font-size: 0.95rem; margin-top: 8px; }
/* Timeline */
.timeline { max-width: 760px; margin: 0 auto; position: relative; }
.timeline::before { content: ""; position: absolute; left: 11px; top: 0; bottom: -8px; width: 2px; background: var(--color-primary-100); }
.timeline-item { position: relative; padding: 0 0 28px 44px; }
.timeline-item::before { content: ""; position: absolute; left: 4px; top: 4px; width: 16px; height: 16px; border-radius: 50%; background: var(--color-white); border: 3px solid var(--color-primary); }
.timeline-item .year { font-size: 1.1rem; font-weight: 700; color: var(--color-primary-dark); margin-bottom: 4px; }
.timeline-item .title { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.timeline-item p { color: var(--color-text-light); font-size: 0.92rem; }
/* Compliance */
.compliance-banner { background: var(--color-primary-50); border: 1px solid var(--color-primary-100); border-radius: var(--radius-md); padding: 12px 24px; text-align: center; font-size: 0.88rem; color: var(--color-primary-dark); margin-bottom: 28px; }
.compliance-banner strong { font-weight: 600; }
/* Products */
.biz-block { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; padding: 48px 0; border-bottom: 1px solid var(--color-border); }
.biz-block:last-child { border-bottom: none; }
.biz-block:nth-child(even) .biz-block-text { order: 2; }
.biz-block.qr-row .biz-block-text { order: 0; }
.biz-block.text-only { grid-template-columns: 1fr; }
.biz-block-visual { display: flex; align-items: center; justify-content: center; overflow: hidden; border-radius: var(--radius-lg); }
.biz-block-visual.has-grad { height: 280px; background: linear-gradient(135deg, var(--color-primary-50), var(--color-primary-100)); }
.biz-block-visual svg { width: 80px; height: 80px; opacity: 0.5; }
.biz-block-visual.qr-wrapper { height: auto; flex-direction: column; gap: 12px; }
.biz-block-visual img.qr-code-img { width: 240px; height: 240px; object-fit: contain; border-radius: 12px; box-shadow: 0 2px 12px rgba(0,0,0,.08); }
.biz-block-visual .qr-label { font-size: .82rem; color: var(--color-text-light); margin-top: 0; }
.biz-block-text h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 14px; }
.biz-block-text p { color: var(--color-text-light); margin-bottom: 12px; line-height: 1.7; }
.biz-block-text .tag-list { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.biz-block-text .tag { font-size: 0.82rem; padding: 4px 12px; border-radius: var(--radius-sm); background: var(--color-primary-50); color: var(--color-primary-dark); font-weight: 500; }
/* Qualifications */
.qual-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 28px; }
.qual-card { background: var(--color-white); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; transition: box-shadow var(--transition); }
.qual-card:hover { box-shadow: var(--shadow-md); }
.qual-card-img { height: 220px; display: flex; align-items: center; justify-content: center; background: var(--color-bg-alt2); border-bottom: 1px solid var(--color-border); position: relative; }
.qual-card-img img { max-height: 200px; object-fit: contain; border-radius: 4px; }
.qual-card-img .qual-badge { position: absolute; top: 12px; right: 12px; background: var(--color-primary); color: var(--color-white); font-size: 0.75rem; padding: 3px 10px; border-radius: var(--radius-sm); font-weight: 600; }
.qual-card-body { padding: 24px; }
.qual-card-body h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 12px; }
.qual-card-body .qual-row { display: flex; justify-content: space-between; align-items: center; padding: 8px 0; border-bottom: 1px dashed var(--color-border); font-size: 0.92rem; }
.qual-card-body .qual-row:last-of-type { border-bottom: none; }
.qual-card-body .qual-row .qlabel { color: var(--color-text-light); font-weight: 500; }
.qual-card-body .qual-row .qval { color: var(--color-text); font-weight: 600; }
.qual-card-body .qual-link { margin-top: 14px; }
/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-list { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-item .contact-icon { width: 44px; height: 44px; border-radius: var(--radius-md); flex-shrink: 0; background: var(--color-primary-50); display: flex; align-items: center; justify-content: center; }
.contact-item .contact-icon svg { width: 22px; height: 22px; }
.contact-item h4 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.contact-item p { color: var(--color-text-light); font-size: 0.95rem; }
.contact-map { height: 360px; border-radius: var(--radius-lg); border: 1px solid var(--color-border); background: var(--color-bg-alt2); overflow: hidden; }
.contact-map img { width: 100%; height: 100%; object-fit: cover; display: block; }
/* Join */
.value-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.value-card { text-align: center; padding: 28px 20px; }
.value-card .value-icon { width: 48px; height: 48px; margin: 0 auto 14px; border-radius: var(--radius-md); background: var(--color-primary-50); display: flex; align-items: center; justify-content: center; }
.value-card .value-icon svg { width: 24px; height: 24px; }
.value-card h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.value-card p { color: var(--color-text-light); font-size: 0.9rem; }
.dir-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; }
.dir-item { padding: 24px 20px; border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-white); transition: border-color var(--transition); }
.dir-item:hover { border-color: var(--color-primary); }
.dir-item h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.dir-item p { color: var(--color-text-light); font-size: 0.9rem; }
.join-cta { text-align: center; margin-top: 56px; }
.join-cta .join-email { display: inline-block; margin-top: 16px; font-size: 1.15rem; font-weight: 600; color: var(--color-primary-dark); }
/* Legal / Privacy */
.legal-content { max-width: 820px; margin: 0 auto; }
.legal-content h2 { font-size: 1.25rem; font-weight: 700; color: var(--color-primary-dark); margin: 36px 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--color-border); }
.legal-content h2:first-child { margin-top: 0; }
.legal-content h3 { font-size: 1.05rem; font-weight: 600; margin: 20px 0 8px; }
.legal-content p { color: var(--color-text); margin-bottom: 12px; line-height: 1.8; }
.legal-content ul { margin: 0 0 16px 20px; list-style: disc; }
.legal-content ul li { margin-bottom: 6px; line-height: 1.7; }
.legal-content .updated-date { color: var(--color-text-light); font-size: 0.9rem; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--color-border); }
/* Footer */
 .site-footer { background: #1f2937; color: #d1d5db; }
/* Product showcase grid */
.product-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 24px; }
.product-cat { grid-column: 1 / -1; display: flex; align-items: center; gap: 10px; margin-top: 24px; }
.product-cat:first-child { margin-top: 0; }
.product-cat::before { content: ""; width: 4px; height: 16px; border-radius: 2px; background: linear-gradient(180deg, var(--color-primary-light), var(--color-primary-dark)); flex-shrink: 0; }
.product-cat .cat-name { font-size: 1.05rem; font-weight: 700; color: var(--color-text); }
.product-cat .cat-count { font-size: 0.78rem; color: var(--color-text-lighter); font-weight: 400; }
.product-card { display: flex; flex-direction: column; background: var(--color-white); border: 1px solid var(--color-border); border-radius: 12px; overflow: hidden; transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-primary-100); }
.product-card-img { position: relative; aspect-ratio: 1 / 1; display: flex; align-items: center; justify-content: center; background: var(--color-white); border-bottom: 1px solid var(--color-bg-alt2); padding: 20px; }
.product-card-img img { max-width: 100%; max-height: 100%; object-fit: contain; transition: transform 300ms ease; }
.product-card:hover .product-card-img img { transform: scale(1.06); }
.product-card-img .product-tag { position: absolute; top: 10px; left: 10px; font-size: 0.72rem; padding: 3px 8px; border-radius: var(--radius-sm); background: var(--color-primary-50); color: var(--color-primary-dark); border: 1px solid var(--color-primary-100); font-weight: 500; line-height: 1.4; }
.product-card-body { padding: 14px 16px 16px; display: flex; flex-direction: column; flex: 1; text-align: left; }
.product-card-body h4 { font-size: 0.95rem; font-weight: 600; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-card-body .brand { font-size: 0.78rem; color: var(--color-text-lighter); margin-top: 4px; }
.product-card-desc { font-size: 0.8rem; color: var(--color-text-light); line-height: 1.55; margin-top: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.products-intro { text-align: center; color: var(--color-text-light); margin: -16px auto 32px; max-width: 680px; line-height: 1.7; }
.disclaimer-note { margin-top: 36px; padding: 16px 20px; background: var(--color-primary-50); border-left: 3px solid var(--color-primary); border-radius: var(--radius-sm); color: var(--color-text-light); font-size: 0.84rem; line-height: 1.6; }
.site-footer .footer-main { padding: 48px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand img { height: 32px; margin-bottom: 14px; filter: brightness(0) invert(1); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: #9ca3af; max-width: 300px; }
.footer-col h4 { color: #f3f4f6; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
.footer-col a { display: block; color: #9ca3af; font-size: 0.9rem; padding: 4px 0; }
.footer-col a:hover { color: var(--color-white); }
.footer-bar { border-top: 1px solid #374151; padding: 18px 0; font-size: 0.85rem; }
.footer-bar .footer-meta { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.footer-bar a { color: #9ca3af; margin: 0 4px; }
.footer-bar a:hover { color: var(--color-white); }
/* Responsive */
@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 768px) {
  .hero h1 { font-size: 1.8rem; }
  .hero p { font-size: 1rem; }
  .section { padding: 48px 0; }
  .section-title h2 { font-size: 1.4rem; }
  .page-header h1 { font-size: 1.5rem; }
  .page-header p { font-size: 0.95rem; }
  .nav-toggle { display: flex; flex-direction: column; justify-content: center; gap: 0; }
  .nav-toggle { margin-left: auto; }
  .header-contact { display: none; }
  .site-header { backdrop-filter: none; -webkit-backdrop-filter: none; }
  .main-nav { position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0; background: #ffffff; flex-direction: column; align-items: flex-start; border-top: 1px solid var(--color-border); padding: 16px 24px; gap: 4px; transform: translateX(100%); transition: transform var(--transition); pointer-events: none; display: flex; z-index: 200; box-shadow: var(--shadow-md); }
  .main-nav.open { transform: translateX(0); pointer-events: auto; }
  .main-nav ul { flex-direction: column; width: 100%; gap: 0; }
  .main-nav li { width: 100%; }
  .main-nav a { display: block; padding: 12px 0; border-bottom: 1px solid var(--color-border); }
  .main-nav a.active { border-bottom-color: var(--color-primary); }
  .biz-block, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
  .biz-block:nth-child(even) .biz-block-text { order: 0; }
  .biz-block-visual.has-grad { height: 200px; }
  .product-list { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
  .product-card-img { padding: 14px; }
  .product-card-body { padding: 12px 12px 14px; }
  .product-cat .cat-name { font-size: 0.98rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bar .footer-meta { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero { padding: 56px 0 72px; }
  .hero-cta { flex-direction: column; align-items: center; }
  .hero-cta .btn { width: 100%; }
  .highlights { gap: 28px; }
}