:root {
  --ink: #1a1033;
  --ink-2: #2f2350;
  --muted: #6b6480;
  --line: #e8e4f0;
  --bg: #f7f5fb;
  --white: #fff;
  --accent: #340d6e;
  --accent-2: #5b21b6;
  --max: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Inter", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

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

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.nav { display: flex; align-items: center; gap: 28px; height: 72px; }
.brand { display: inline-flex; align-items: center; font-weight: 800; letter-spacing: .1em; font-size: 19px; }

.nav-links { display: flex; gap: 22px; margin-left: auto; font-size: 14.5px; font-weight: 500; color: var(--ink-2); }
.nav-links a { padding: 6px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover { border-color: var(--accent); }
.nav-cta {
  background: var(--accent); color: #fff; padding: 10px 18px; border-radius: 8px;
  font-weight: 600; font-size: 14px;
}
.nav-cta:hover { background: var(--accent-2); }

.dropdown { position: relative; }
.dropdown-menu {
  position: absolute; top: 100%; left: -12px; min-width: 300px;
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 18px 40px rgba(12,26,38,.12); padding: 8px;
  display: none; grid-template-columns: 1fr 1fr; gap: 2px;
}
.dropdown:hover .dropdown-menu { display: grid; }
.dropdown-menu a { padding: 8px 10px; border-radius: 6px; font-size: 13.5px; color: var(--ink-2); }
.dropdown-menu a:hover { background: var(--bg); }

/* ---------- hero ---------- */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background: linear-gradient(120deg, #170a33 0%, #2a1155 48%, #3d1673 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(circle at 78% 18%, rgba(147,110,255,.30), transparent 45%),
                    radial-gradient(circle at 12% 82%, rgba(56,140,255,.22), transparent 46%);
}
.hero-inner { position: relative; z-index: 2; padding: 96px 0 104px; max-width: 760px; }
.eyebrow { color: var(--accent); font-weight: 700; letter-spacing: .18em; font-size: 12.5px; text-transform: uppercase; }
.hero h1 { font-size: 46px; line-height: 1.14; margin: 16px 0 18px; letter-spacing: -.02em; font-weight: 800; }
.hero p { color: #c9d8e3; font-size: 17px; max-width: 620px; margin: 0 0 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 13px 24px; border-radius: 8px; font-weight: 600; font-size: 15px; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-2); color: #fff; }
.btn-ghost { border: 1px solid rgba(255,255,255,.35); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }

/* ---------- stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border-top: 1px solid var(--line); }
.stat { background: #fff; padding: 26px 22px; }
.stat b { display: block; font-size: 30px; letter-spacing: -.02em; }
.stat small { color: var(--muted); font-size: 13px; }

/* ---------- sections ---------- */
section { padding: 76px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
.section-head h2 { font-size: 30px; margin: 0; letter-spacing: -.02em; }
.section-head p { margin: 8px 0 0; color: var(--muted); max-width: 560px; }
.more { color: var(--accent-2); font-weight: 600; font-size: 14px; white-space: nowrap; }

.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.cat-card {
  border: 1px solid var(--line); border-radius: 12px; padding: 20px;
  background: #fff; transition: .18s ease;
}
.cat-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 14px 30px rgba(12,26,38,.07); }
.cat-card h3 { margin: 0 0 6px; font-size: 15.5px; }
.cat-card p { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.5; }

.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.prod-card { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #fff; transition: .18s; }
.prod-card:hover { box-shadow: 0 16px 36px rgba(12,26,38,.09); transform: translateY(-2px); }
.prod-card .thumb { aspect-ratio: 4/3; background: var(--bg); overflow: hidden; }
.prod-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.prod-card .body { padding: 16px 18px 20px; }
.prod-card h3 { font-size: 15.5px; margin: 0 0 8px; line-height: 1.4; }
.prod-card p { margin: 0; color: var(--muted); font-size: 13px; }

.cta-band { background: var(--ink); color: #fff; }
.cta-band .wrap { display: flex; align-items: center; gap: 30px; justify-content: space-between; flex-wrap: wrap; }
.cta-band h2 { font-size: 27px; margin: 0 0 6px; }
.cta-band p { margin: 0; color: #a9bece; }

/* ---------- product detail ---------- */
.product-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 46px; align-items: start; }
.gallery-main { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: var(--bg); }
.gallery-thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.gallery-thumbs img { width: 84px; height: 64px; object-fit: cover; border-radius: 8px; border: 1px solid var(--line); cursor: pointer; }
.spec-list { list-style: none; padding: 0; margin: 18px 0 0; }
.spec-list li { padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.spec-list li b { color: var(--ink-2); }

/* ---------- prose ---------- */
.prose { max-width: 780px; }
.prose h2 { font-size: 24px; margin: 34px 0 12px; }
.prose p { margin: 0 0 16px; color: #2a3d4d; }
.prose ul { padding-left: 20px; color: #2a3d4d; }

/* ---------- footer ---------- */
.site-footer { background: #170a33; color: #8ea6b8; padding: 56px 0 30px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 34px; }
.site-footer h4 { color: #fff; font-size: 14px; margin: 0 0 14px; letter-spacing: .06em; text-transform: uppercase; }
.site-footer a:hover { color: var(--accent); }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 40px; padding-top: 20px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

@media (max-width: 900px) {
  .hero h1 { font-size: 32px; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .product-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
}

/* 产品图：统一容器高度 + 完整显示，避免小图撑出大片空白 */
.gallery-main {
  display: flex; align-items: center; justify-content: center;
  height: 520px; padding: 18px; background: #fff;
}
.gallery-main img { width: 100%; height: 100%; object-fit: contain; }
.gallery-thumbs img { width: 84px; height: 64px; object-fit: contain; background: #fff; }
.p-title { font-size: 32px; line-height: 1.25; margin: 0 0 14px; letter-spacing: -.01em; }
.p-desc { color: var(--muted); font-size: 15.5px; margin: 0 0 22px; }
.crumbs { background: var(--bg); padding: 18px 0; border-bottom: 1px solid var(--line); font-size: 13.5px; color: var(--muted); }
.actions { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
.btn-outline { border: 1px solid var(--line); }
@media (max-width: 900px) { .gallery-main { height: 320px; } }

/* 手机端页脚改单列，避免公司全称被挤成碎行 */
@media (max-width: 700px) {
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .site-footer p { max-width: none !important; }
}

/* 联系表单 */
.contact-form { display: grid; gap: 12px; background: var(--bg); padding: 24px; border-radius: 14px; max-width: 520px; }
.contact-form label { display: grid; gap: 6px; font-size: 13.5px; color: var(--ink-2); font-weight: 600; }
.contact-form input, .contact-form textarea {
  padding: 11px 12px; border: 1px solid var(--line); border-radius: 8px; font: inherit; font-weight: 400; background: #fff;
}
.contact-form button { justify-self: start; border: 0; cursor: pointer; }

/* ---------- 中文站专用 ---------- */
.brand img { height: 44px; width: auto; }
.hero h1 { font-size: 44px; letter-spacing: 0; }
.hero p { font-size: 16.5px; }
.section-head h2 { font-size: 28px; letter-spacing: 0; }
.cat-card h3 { font-size: 16px; }
.prod-card h3 { font-size: 15.5px; }
.p-title { letter-spacing: 0; }
.brand { letter-spacing: 0; }
.eyebrow { letter-spacing: .08em; }
@media (max-width: 900px) { .brand img { height: 34px; } .hero h1 { font-size: 30px; } }

/* 中文站：hero 内文字配色修正 */
.hero .eyebrow { color: #c9a4ff; }
.hero h1 { font-size: 40px; }
@media (max-width: 900px) { .hero h1 { font-size: 27px; } }

/* 产品参数表 */
.spec-table { width: 100%; border-collapse: collapse; margin: 18px 0 0; font-size: 14.5px; }
.spec-table th, .spec-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec-table th { width: 32%; color: var(--ink-2); font-weight: 600; background: var(--bg); }
.spec-table tr:first-child th { border-top-left-radius: 8px; }

/* 合作伙伴 */
.pchips { display: flex; flex-wrap: wrap; gap: 12px; }
.pchip { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px 22px; font-size: 14.5px; color: var(--ink-2); font-weight: 600; }

/* 导航下拉项与普通导航项对齐（原「产品中心」偏高 2px） */
.nav-links .dropdown { display: flex; align-items: center; }
.nav-links .dropdown > a { display: inline-flex; align-items: center; }

/* 首屏不再叠加 section 的上下内边距 */
.hero { padding: 0; }