:root {
  --bg: #050a17;
  --bg-soft: #0a1226;
  --card: #0e1a33;
  --border: #1b2c52;
  --text: #e6edf7;
  --muted: #90a6cc;
  --accent: #3b82f6;
  --accent-dark: #2563eb;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: var(--bg); color: var(--text); font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif; line-height: 1.6; }
a { color: var(--accent); text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.topbar { background: linear-gradient(90deg, #1e3a8a, #2563eb); color: #eaf2ff; text-align: center; font-size: .8rem; padding: 7px 12px; font-weight: 600; }
.nav { background: rgba(7,13,26,.9); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50; backdrop-filter: blur(8px); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { font-size: 1.35rem; font-weight: 800; color: var(--text); letter-spacing: 1px; }
.brand span { display: block; font-size: .62rem; color: var(--accent); font-weight: 600; letter-spacing: 3px; }
.nav-links { display: flex; gap: 22px; margin-left: auto; }
.nav-links a { color: var(--muted); font-size: .92rem; font-weight: 500; }
.nav-links a:hover { color: var(--accent); }
.btn { display: inline-block; padding: 12px 26px; border-radius: 8px; font-weight: 600; font-size: .95rem; border: 1px solid transparent; cursor: pointer; }
.btn-primary { background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-outline { border-color: var(--accent); color: var(--accent); }
.btn-outline:hover { background: rgba(59,130,246,.12); }
.btn-ghost { border-color: var(--border); color: var(--text); }
.btn-sm { padding: 8px 16px; font-size: .85rem; }
.nav-cta { margin-left: 8px; }
.hero { padding: 90px 0 70px; background: radial-gradient(1200px 500px at 70% -10%, rgba(59,130,246,.16), transparent), var(--bg); }
.hero-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.eyebrow { color: var(--accent); font-size: .8rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; }
.hero h1 { font-size: 3rem; line-height: 1.15; margin: 14px 0 18px; }
.hero h1 em { color: var(--accent); font-style: normal; }
.hero p { color: var(--muted); max-width: 560px; }
.hero-actions { display: flex; gap: 14px; margin: 26px 0; flex-wrap: wrap; }
.hero-checks { display: grid; grid-template-columns: repeat(2, minmax(0, 220px)); gap: 10px; color: var(--muted); font-size: .9rem; }
.hero-checks .check { color: var(--accent); margin-right: 8px; }
.hero-panel { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 28px; }
.hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 20px; }
.stat b { display: block; font-size: 1.7rem; color: var(--accent); }
.stat span { color: var(--muted); font-size: .8rem; }
.vial { text-align: center; padding: 18px 0 6px; }
.vial .vial-icon { font-size: 3rem; }
section { padding: 72px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 42px; }
.section-head h2 { font-size: 2rem; margin: 10px 0 12px; }
.section-head p { color: var(--muted); }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 22px; }
.product-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 18px; display: flex; flex-direction: column; transition: transform .15s, border-color .15s; }
.product-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.product-thumb { position: relative; border-radius: 10px; background: var(--bg-soft); height: 170px; display: flex; align-items: center; justify-content: center; overflow: hidden; margin-bottom: 14px; }
.product-thumb img { height: 100%; width: 100%; object-fit: cover; }
.product-placeholder { font-size: 2.4rem; font-weight: 800; color: var(--accent); opacity: .6; }
.purity-badge { position: absolute; top: 10px; left: 10px; background: rgba(59,130,246,.16); color: var(--accent); font-size: .7rem; font-weight: 700; padding: 3px 9px; border-radius: 99px; }
.product-card h3 { font-size: 1.05rem; margin-bottom: 6px; }
.product-card p { color: var(--muted); font-size: .85rem; flex: 1; }
.product-card-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 14px; }
.price { color: var(--accent); font-weight: 700; }
.center-link { text-align: center; margin-top: 34px; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.feature-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 26px; }
.feature-card h3 { font-size: 1.05rem; margin: 12px 0 8px; color: var(--accent); }
.feature-card p { color: var(--muted); font-size: .92rem; }
.coa-panel { background: var(--card); border: 1px solid var(--border); border-radius: 16px; max-width: 720px; margin: 0 auto; padding: 30px; }
.coa-panel .meta { color: var(--muted); font-size: .8rem; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: .92rem; }
.spec-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
.spec-table td:first-child { color: var(--muted); width: 42%; }
.pass { color: var(--accent); font-weight: 700; }
.case-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
.case-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 26px; display: flex; flex-direction: column; }
.case-card .field { color: var(--accent); font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; }
.case-card h3 { margin: 10px 0 6px; font-size: 1.08rem; }
.case-card .inst { color: var(--muted); font-size: .8rem; margin-bottom: 10px; }
.case-card p { color: var(--muted); font-size: .9rem; flex: 1; }
.case-card .prod { margin-top: 14px; font-size: .82rem; color: var(--text); }
.solutions-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); gap: 22px; }
.solution-card { display: block; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 26px; color: var(--text); }
.solution-card:hover { border-color: var(--accent); }
.solution-card h3 { color: var(--accent); margin-bottom: 8px; }
.solution-card p { color: var(--muted); font-size: .92rem; margin-bottom: 10px; }
.team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 22px; }
.team-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 24px; text-align: center; }
.team-avatar { width: 84px; height: 84px; border-radius: 50%; background: linear-gradient(135deg, #3b82f6, #1e3a8a); margin: 0 auto 14px; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; font-weight: 800; color: #eaf2ff; }
.team-card img { width: 84px; height: 84px; border-radius: 50%; object-fit: cover; margin: 0 auto 14px; }
.team-card h3 { font-size: 1rem; }
.team-card .role { color: var(--accent); font-size: .82rem; margin-bottom: 8px; }
.team-card p { color: var(--muted); font-size: .85rem; }
.cta-band { background: linear-gradient(120deg, rgba(59,130,246,.15), rgba(30,64,175,.18)); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.cta-band .inner { text-align: center; max-width: 620px; margin: 0 auto; }
.cta-band h2 { font-size: 1.9rem; margin: 10px 0 12px; }
.cta-band p { color: var(--muted); margin-bottom: 24px; }
.breadcrumb { color: var(--muted); font-size: .85rem; padding: 22px 0 0; }
.shop-layout { display: grid; grid-template-columns: 250px 1fr; gap: 30px; padding: 30px 0 60px; }
.filter-box { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px; position: sticky; top: 84px; height: fit-content; }
.filter-box h4 { font-size: .85rem; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); margin-bottom: 10px; }
.filter-list a { display: flex; justify-content: space-between; color: var(--muted); padding: 8px 10px; border-radius: 8px; font-size: .92rem; }
.filter-list a.active, .filter-list a:hover { background: rgba(59,130,246,.12); color: var(--accent); }
.shop-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; gap: 12px; flex-wrap: wrap; }
.shop-head select { background: var(--bg-soft); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }
.pager { margin-top: 34px; text-align: center; }
.pager a, .pager span { display: inline-block; padding: 7px 13px; margin: 0 4px; border-radius: 8px; border: 1px solid var(--border); color: var(--muted); font-size: .9rem; }
.pager .current { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 700; }
.pager a:hover { color: var(--accent); border-color: var(--accent); }
.pager .disabled { opacity: .4; }
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; padding: 34px 0 60px; }
.pd-gallery { background: var(--card); border: 1px solid var(--border); border-radius: 16px; height: 380px; display: flex; align-items: center; justify-content: center; }
.pd-gallery img { max-height: 100%; border-radius: 16px; object-fit: cover; }
.pd-gallery .vial-icon { font-size: 5rem; }
.pd-info h1 { font-size: 2.1rem; margin: 8px 0 12px; }
.pd-badges { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.pd-badges span { background: var(--card); border: 1px solid var(--border); color: var(--muted); border-radius: 99px; padding: 4px 12px; font-size: .78rem; }
.pd-price { font-size: 1.9rem; color: var(--accent); font-weight: 800; margin-bottom: 14px; }
.variant-label { font-size: .85rem; color: var(--muted); margin-bottom: 8px; }
.variants { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; }
.variants button { background: var(--bg-soft); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 9px 14px; font-size: .86rem; cursor: pointer; }
.variants button.active { border-color: var(--accent); color: var(--accent); background: rgba(59,130,246,.12); }
.pd-actions { display: flex; gap: 12px; margin-bottom: 24px; flex-wrap: wrap; }
.pd-desc { color: var(--muted); }
.faq-item { border-bottom: 1px solid var(--border); padding: 14px 0; }
.faq-item b { display: block; margin-bottom: 5px; }
.faq-item p { color: var(--muted); font-size: .9rem; }
.disclaimer-box { margin-top: 26px; border: 1px dashed var(--border); border-radius: 12px; padding: 16px; color: var(--muted); font-size: .84rem; }
.form-page { max-width: 680px; margin: 0 auto; padding: 50px 0 80px; }
.form-page h1 { margin-bottom: 10px; }
.form-page > p { color: var(--muted); margin-bottom: 30px; }
.form-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 30px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: 6px; }
.field input, .field textarea { width: 100%; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 11px 12px; font-size: .95rem; font-family: inherit; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.error { color: #f87171; font-size: .8rem; margin-top: 4px; }
.alert-success { background: rgba(59,130,246,.14); border: 1px solid var(--accent); color: #93c5fd; border-radius: 10px; padding: 14px 16px; margin-bottom: 20px; }
.page-content { max-width: 800px; margin: 0 auto; padding: 50px 0 80px; }
.page-content h1 { margin-bottom: 18px; }
.page-content .body { color: var(--muted); }
.page-content .body h2 { color: var(--text); margin: 22px 0 10px; font-size: 1.3rem; }
.page-content .body p { margin-bottom: 12px; }
.footer { border-top: 1px solid var(--border); background: var(--bg-soft); padding: 54px 0 0; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr; gap: 30px; }
.footer p { color: var(--muted); font-size: .88rem; margin-top: 10px; }
.footer h4 { font-size: .9rem; margin-bottom: 12px; }
.footer ul li { margin-bottom: 8px; }
.footer ul a { color: var(--muted); font-size: .88rem; }
.footer ul a:hover { color: var(--accent); }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.badges span { border: 1px solid var(--border); color: var(--muted); font-size: .72rem; padding: 3px 10px; border-radius: 99px; }
.footer-bottom { border-top: 1px solid var(--border); margin-top: 40px; padding: 18px 20px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: var(--muted); font-size: .8rem; }
/* ---------- 语言切换器 ---------- */
.lang-switcher { display: flex; gap: 4px; margin-left: 12px; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 99px; padding: 3px; }
.lang-switcher a { color: var(--muted); font-size: .78rem; font-weight: 600; padding: 3px 10px; border-radius: 99px; }
.lang-switcher a.active { background: var(--accent); color: #fff; }
.lang-switcher a:hover:not(.active) { color: var(--accent); }

/* ---------- 页脚公司信息 ---------- */
.footer-company { font-size: .8rem; margin-top: 12px !important; max-width: 420px; }
.footer-company a { color: var(--accent); font-weight: 600; }

/* ---------- 汉堡菜单 ---------- */
.menu-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text); font-size: 1.1rem; width: 40px; height: 40px; border-radius: 8px; cursor: pointer; margin-left: 8px; align-items: center; justify-content: center; padding: 0; }
.menu-toggle i { line-height: 1; }

/* ---------- 平板 / 小屏（≤1024px） ---------- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .hero h1 { font-size: 2.5rem; }
}

/* ---------- 导航折叠（≤960px，修复 901-960 顶部布局崩溃） ---------- */
@media (max-width: 960px) {
  .menu-toggle { display: inline-flex; }
  .nav-inner { flex-wrap: wrap; height: auto; padding-top: 10px; padding-bottom: 10px; position: relative; }
  .nav-cta { display: none; }
  .nav-links { display: none; order: 3; width: 100%; flex-direction: column; gap: 0; margin: 10px -20px -10px; background: var(--bg-soft); border-top: 1px solid var(--border); padding: 6px 0; }
  .nav-links li a { display: block; padding: 12px 20px; border-bottom: 1px solid var(--border); font-size: 1rem; }
  .nav-links li:last-child a { border-bottom: none; }
  body.nav-open .nav-links { display: flex; }
  .lang-switcher { margin-left: auto; }
}

/* ---------- 移动端（≤900px） ---------- */
@media (max-width: 900px) {
  section { padding: 44px 0; }
  .hero { padding: 56px 0 44px; }
  .section-head { margin-bottom: 28px; }

  /* 导航：汉堡下拉菜单 */
  .menu-toggle { display: inline-flex; }
  .nav-inner { flex-wrap: wrap; height: auto; padding-top: 10px; padding-bottom: 10px; position: relative; }
  .nav-cta { display: none; }
  .nav-links { display: none; order: 3; width: 100%; flex-direction: column; gap: 0; margin: 10px -20px -10px; background: var(--bg-soft); border-top: 1px solid var(--border); padding: 6px 0; }
  .nav-links li a { display: block; padding: 12px 20px; border-bottom: 1px solid var(--border); font-size: 1rem; }
  .nav-links li:last-child a { border-bottom: none; }
  body.nav-open .nav-links { display: flex; }
  .lang-switcher { margin-left: auto; }

  /* 首页 */
  .hero-grid, .product-detail, .shop-layout { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2.1rem; }
  .hero p { font-size: .95rem; }
  .hero-actions .btn { padding: 11px 20px; }
  .hero-checks { grid-template-columns: 1fr; gap: 6px; }
  .hero-panel { padding: 20px; }
  .hero-stats { gap: 12px; }
  .stat b { font-size: 1.4rem; }
  .vial .vial-icon { font-size: 2.4rem; }

  .product-grid { grid-template-columns: repeat(auto-fill, minmax(min(100%, 160px), 1fr)); gap: 14px; }
  .product-card { padding: 12px; }
  .product-card h3 { font-size: .95rem; }
  .product-card p { font-size: .8rem; }
  .product-card-foot { flex-direction: column; align-items: flex-start; gap: 8px; }
  .product-card-foot .btn { align-self: stretch; text-align: center; }

  .section-head h2 { font-size: 1.5rem; }
  .feature-grid, .case-grid, .solutions-grid { grid-template-columns: 1fr; gap: 16px; }

  /* 详情页 */
  .product-detail { gap: 24px; padding-bottom: 40px; }
  .pd-gallery { height: 260px; }
  .pd-info h1 { font-size: 1.6rem; }
  .pd-price { font-size: 1.5rem; }
  .pd-actions .btn { flex: 1; text-align: center; padding: 12px 10px; }

  /* 商店 */
  .filter-box { position: static; }
  .shop-head { flex-direction: column; align-items: flex-start; gap: 10px; }

  /* 表单 */
  .form-page { padding: 30px 0 50px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .form-card { padding: 20px; }

  /* COA */
  .coa-search { flex-wrap: wrap; }
  .coa-search input { min-width: 0; flex: 1 1 160px; }
  .coa-stats { gap: 12px; }
  .coa-stat { padding: 10px 18px; }
  .coa-stat b { font-size: 1.2rem; }

  /* 页脚 */
  .footer { padding-top: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 22px; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: 6px; text-align: left; }
}

/* ---------- 小屏手机（≤480px） ---------- */
@media (max-width: 480px) {
  .topbar { font-size: .7rem; padding: 6px 10px; }
  .container { padding: 0 14px; }
  .brand { font-size: 1.1rem; }
  .brand span { font-size: .55rem; letter-spacing: 2px; }
  .nav-cta { display: none; }
  .hero h1 { font-size: 1.7rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { text-align: center; }
  .hero-checks { font-size: .85rem; }
  .section-head h2 { font-size: 1.3rem; }
  .section-head p { font-size: .9rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band h2 { font-size: 1.4rem; }
  .team-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .coa-search { flex-direction: column; }
  .coa-search .btn { width: 100%; }
  .pager a, .pager span { padding: 6px 10px; font-size: .85rem; }
  .pd-actions { flex-direction: column; }
  .coa-status-col { display: none; }
  .coa-table td, .coa-table th { padding: 10px 8px; }
  .coa-table .btn { white-space: nowrap; }
  .coa-name { font-size: .92rem; }
  .coa-spec { font-size: .8rem; }
}

.page-list { margin: 0 0 14px 20px; color: var(--muted); }
.page-list li { margin-bottom: 6px; list-style: disc; }

.coa-stats { display: flex; gap: 20px; justify-content: center; margin-bottom: 28px; }
.coa-stat { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 14px 30px; text-align: center; }
.coa-stat b { display: block; font-size: 1.6rem; color: var(--accent); }
.coa-stat span { color: var(--muted); font-size: .8rem; }
.coa-search { display: flex; gap: 10px; max-width: 560px; margin: 0 auto 26px; }
.coa-search input { flex: 1; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 10px 14px; }
.coa-search input:focus { outline: none; border-color: var(--accent); }
.coa-table-wrap { overflow-x: auto; }
.coa-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.coa-table th { text-align: left; color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: 1px; padding: 12px 14px; border-bottom: 1px solid var(--border); }
.coa-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); }
.coa-table tr:hover td { background: rgba(59,130,246,.05); }
.coa-status { background: rgba(59,130,246,.14); color: var(--accent); font-size: .75rem; padding: 3px 10px; border-radius: 99px; }

.coa-name { font-weight: 700; font-size: 1rem; }
.coa-spec { color: var(--muted); font-size: .88rem; }

.vial-icon i { vertical-align: middle; }
.menu-toggle i { pointer-events: none; }

.filter-check { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 8px; cursor: pointer; color: var(--muted); font-size: .92rem; }
.filter-check:hover { background: rgba(59,130,246,.08); color: var(--text); }
.filter-check input { accent-color: var(--accent); width: 15px; height: 15px; cursor: pointer; }
.filter-check:has(input:checked) { color: var(--accent); background: rgba(59,130,246,.1); }

.body-html ul, .body-html ol { margin: 0 0 14px 20px; color: var(--muted); }
.body-html li { margin-bottom: 6px; }
.body-html a { color: var(--accent); }
.body-html strong { color: var(--text); }

.case-filter { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 34px; }
.case-filter button { background: var(--bg-soft); border: 1px solid var(--border); color: var(--muted); padding: 9px 18px; border-radius: 99px; font-size: .88rem; cursor: pointer; }
.case-filter button:hover { color: var(--accent); border-color: var(--accent); }
.case-filter button.active { background: var(--accent); border-color: var(--accent); color: #04211d; font-weight: 600; }
.stats-band { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; padding: 10px 0 30px; }
.stats-band .coa-stat { min-width: 200px; }

/* 案例页卡片：正文撑满剩余空间，Product 行与按钮底部对齐 */
#case-list .case-card p { flex: 1; }
#case-list .case-card .prod { margin-top: auto; }