:root {
  --steel: #374151;
  --steel-dark: #1f2937;
  --blue: #2563eb;
  --blue-light: #3b82f6;
  --yellow: #f59e0b;
  --bg: #eef2f8;          /* 主背景：浅蓝灰 */
  --bg-2: #e4ebf4;        /* 交替区块 */
  --card: #ffffff;
  --card-2: #f8fafc;
  --line: rgba(100, 116, 139, 0.18);
  --text: #1f2937;
  --text-dim: #5b6b80;
  --mono: "SF Mono", "Roboto Mono", Consolas, "Courier New", monospace;
  --radius: 10px;
  --header-h: 72px;
  --shadow: 0 6px 20px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 14px 34px rgba(37, 99, 235, 0.14);
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }

/* 科技感全局背景：淡蓝光晕 + 细网格纹理 */
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(1100px 520px at 50% -140px, rgba(37, 99, 235, 0.12), transparent 62%),
    radial-gradient(900px 500px at 105% 30%, rgba(59, 130, 246, 0.06), transparent 60%),
    var(--bg);
  color: var(--text);
  font-size: clamp(14px, 1.1vw, 17px);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.5), transparent 60%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.5), transparent 60%);
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

/* 顶部导航：白色底 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.05);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong {
  font-size: 19px;
  letter-spacing: 2px;
  color: var(--steel-dark);
}
.brand-text small {
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--text-dim);
  font-family: var(--mono);
}

.main-nav { display: flex; gap: clamp(14px, 2.2vw, 30px); }
.main-nav a {
  position: relative;
  font-size: 15px;
  color: var(--text-dim);
  padding: 6px 2px;
  transition: color 0.2s;
  white-space: nowrap;
  font-weight: 500;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--blue);
  transition: width 0.25s;
}
.main-nav a:hover, .main-nav a.active { color: var(--blue); }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  padding: 10px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--steel-dark);
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero：横屏铺满大图 + 内容垂直居中上下排列 */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #0f172a;
  text-align: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    180deg,
    rgba(10, 16, 30, 0.72) 0%,
    rgba(10, 16, 30, 0.52) 45%,
    rgba(10, 16, 30, 0.8) 100%
  );
}
.hero-content {
  position: relative;
  z-index: 2;
  width: min(860px, 92%);
  padding: 64px 0 20px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #93c5fd;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 3px;
  margin-bottom: 18px;
}
.eyebrow-line { width: 34px; height: 2px; background: var(--blue-light); }
.hero h1 {
  font-size: clamp(32px, 5vw, 58px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 2px;
  color: #ffffff;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}
.hero h1 .accent { color: #60a5fa; }
.hero-desc {
  margin: 22px auto 30px;
  max-width: 42em;
  color: #dbe3ef;
  font-size: clamp(14px, 1.25vw, 17px);
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 26px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}
.btn-primary:hover {
  background: var(--blue-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(37, 99, 235, 0.35);
}
.btn-ghost {
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}
.btn-ghost:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}
.btn-outline-dark {
  border-color: rgba(51, 65, 85, 0.45);
  color: var(--steel-dark);
}
.btn-outline-dark:hover {
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-2px);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 30px;
}
.hero-tags li {
  font-size: 12.5px;
  color: #dbe3ef;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-left: 3px solid var(--blue-light);
  background: rgba(255, 255, 255, 0.08);
  padding: 5px 12px;
  letter-spacing: 1px;
  backdrop-filter: blur(3px);
}

/* Hero 底部数据条（玻璃拟态） */
.hero-stats {
  position: relative;
  z-index: 2;
  margin-top: clamp(28px, 4vw, 48px);
  padding-bottom: 64px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  width: min(1000px, 92%);
}
.hs-item {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: var(--radius);
  padding: 16px 12px;
  backdrop-filter: blur(6px);
  transition: transform 0.25s, border-color 0.25s;
}
.hs-item:hover {
  transform: translateY(-4px);
  border-color: rgba(96, 165, 250, 0.6);
}
.hs-num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 700;
  color: #fff;
  text-shadow: 0 0 18px rgba(96, 165, 250, 0.35);
}
.hs-num .hs-unit { font-size: 0.55em; color: #93c5fd; font-weight: 600; }
.hs-label {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  color: #c3cfe0;
  letter-spacing: 1px;
}

/* 数据面板：深色科技风 */
.data-panel {
  padding: clamp(44px, 6vw, 72px) 0;
  background:
    linear-gradient(rgba(148, 163, 184, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.06) 1px, transparent 1px),
    linear-gradient(135deg, #101a30 0%, #0b1220 55%, #132240 100%);
  background-size: 40px 40px, 40px 40px, 100% 100%;
  border-top: 1px solid rgba(59, 130, 246, 0.25);
  border-bottom: 1px solid rgba(59, 130, 246, 0.25);
}
.data-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}
.data-card {
  position: relative;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: var(--radius);
  padding: 22px 16px 18px;
  text-align: center;
  overflow: hidden;
  backdrop-filter: blur(4px);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s, background 0.25s;
}
.data-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--blue-light), transparent);
}
.data-card:hover {
  transform: translateY(-6px);
  border-color: rgba(96, 165, 250, 0.55);
  background: rgba(37, 99, 235, 0.12);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.45);
}
.dc-num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(24px, 2.6vw, 34px);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  text-shadow: 0 0 20px rgba(96, 165, 250, 0.4);
}
.dc-num .dc-unit { font-size: 0.5em; color: #93c5fd; font-weight: 600; }
.dc-label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: #aebfd6;
  letter-spacing: 1px;
}

/* 通用区块 */
.section { padding: clamp(56px, 7vw, 92px) 0; }
.section-head { text-align: center; margin-bottom: clamp(32px, 4vw, 52px); }
.section-kicker {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 5px;
  color: var(--blue);
  margin-bottom: 10px;
}
.section-head h2 {
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 800;
  color: var(--steel-dark);
  letter-spacing: 2px;
}
.section-head h2::after {
  content: "";
  display: block;
  width: 64px; height: 4px;
  margin: 14px auto 0;
  background: linear-gradient(90deg, var(--blue) 0%, transparent 120%);
}
.section-sub {
  margin-top: 16px;
  color: var(--text-dim);
  font-size: clamp(13px, 1.15vw, 16px);
}

/* 页头横幅（二级页面） */
.page-head {
  position: relative;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: #0f172a;
}
.page-head img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-head::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(10,16,30,0.72), rgba(10,16,30,0.6));
}
.page-head-inner {
  position: relative;
  z-index: 2;
  padding: 48px 0;
}
.page-head .ph-kicker {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 5px;
  color: #93c5fd;
  margin-bottom: 10px;
}
.page-head h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  color: #fff;
  letter-spacing: 3px;
}
.page-head p {
  margin-top: 12px;
  color: #dbe3ef;
  font-size: clamp(13px, 1.2vw, 16px);
}
.crumbs {
  margin-top: 14px;
  font-size: 12.5px;
  color: #93c5fd;
  letter-spacing: 1px;
}
.crumbs a:hover { text-decoration: underline; }

/* 产品中心 */
.products { background: var(--bg); }

.series-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: clamp(36px, 5vw, 56px);
}
.series-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 22px;
  box-shadow: var(--shadow);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
  display: flex;
  flex-direction: column;
}
.series-card:hover {
  transform: translateY(-8px);
  border-color: rgba(59, 130, 246, 0.55);
  box-shadow: var(--shadow-hover);
}
.series-icon {
  width: 56px; height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  margin-bottom: 16px;
}
.series-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--steel-dark);
  margin-bottom: 10px;
  letter-spacing: 1px;
}
.series-card p {
  font-size: 13.5px;
  color: var(--text-dim);
  margin-bottom: 14px;
  flex: 1;
}
.series-card ul li {
  position: relative;
  font-size: 13px;
  color: var(--text);
  padding: 6px 0 6px 20px;
  border-top: 1px dashed rgba(100, 116, 139, 0.25);
}
.series-card ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 13px;
  width: 9px; height: 9px;
  background: var(--blue);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.section-cta { text-align: center; margin-top: 34px; }

/* 产品技术资料大图墙（放大显示） */
.gallery-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
}
.gallery-head h3 { font-size: 20px; font-weight: 700; color: var(--steel-dark); }
.gallery-head span {
  font-size: 12px;
  color: var(--text-dim);
  font-family: var(--mono);
  letter-spacing: 1px;
}
.gallery-sec { background: var(--bg-2); }
.product-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.gallery-item {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
  cursor: zoom-in;
  box-shadow: var(--shadow);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
  aspect-ratio: 3 / 2;
}
.gallery-item:hover {
  transform: translateY(-6px) scale(1.01);
  border-color: rgba(59, 130, 246, 0.6);
  box-shadow: var(--shadow-hover);
}
.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.gallery-item:hover img { transform: scale(1.04); }
.gallery-item figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 26px 16px 12px;
  background: linear-gradient(0deg, rgba(10, 16, 30, 0.88), transparent);
  font-size: 14px;
  color: #fff;
  letter-spacing: 1px;
}
.gallery-item figcaption small {
  display: block;
  color: #93c5fd;
  font-family: var(--mono);
  font-size: 11px;
  margin-bottom: 2px;
}
.gallery-item .zoom-hint {
  position: absolute;
  top: 12px; right: 12px;
  width: 34px; height: 34px;
  border: 1px solid rgba(255,255,255,0.45);
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: rgba(10, 16, 30, 0.5);
  opacity: 0;
  transition: opacity 0.2s;
}
.gallery-item:hover .zoom-hint { opacity: 1; }
.gallery-noscript { text-align: center; color: var(--text-dim); padding: 30px 0; }

/* 车间实力 */
.workshop { background: var(--bg-2); }
.workshop-banner {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 26px;
  aspect-ratio: 21 / 8;
  min-height: 220px;
  box-shadow: var(--shadow);
}
.workshop-banner img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.workshop-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10,16,30,0.5), transparent 45%, transparent 65%, rgba(10,16,30,0.35));
}
.banner-badge {
  position: absolute;
  left: 22px; bottom: 18px;
  z-index: 2;
  padding: 8px 16px;
  background: rgba(10, 15, 26, 0.85);
  border-left: 3px solid var(--blue);
  font-size: 14px;
  letter-spacing: 2px;
  color: #fff;
}
.workshop-layout {
  display: flex;
  gap: 22px;
  align-items: stretch;
}
.workshop-photos,
.workshop-list { flex: 1 1 0; min-width: 0; }
.workshop-photos {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 14px;
  height: 100%;
  min-height: 440px;
}
.workshop-photos figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}
.workshop-photos figure:first-child {
  grid-row: 1 / -1;
}
.workshop-photos img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.workshop-photos figure:hover img { transform: scale(1.04); }

.workshop-list {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: var(--shadow);
}
.workshop-list h3 {
  font-size: 20px;
  color: var(--steel-dark);
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.cap-list li {
  display: flex;
  gap: 16px;
  padding: 15px 0;
  border-top: 1px solid var(--line);
}
.cap-list li:first-child { border-top: none; }
.cap-list li > span {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--blue);
  line-height: 1.3;
  min-width: 34px;
}
.cap-list strong { display: block; font-size: 15px; color: var(--steel-dark); margin-bottom: 3px; }
.cap-list small { font-size: 12.5px; color: var(--text-dim); }

/* 关于我们：公司简介 */
.about-intro { background: var(--bg); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 4vw, 48px);
  align-items: center;
}
.about-photo {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.about-photo img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.about-copy h3 {
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--steel-dark);
  line-height: 1.5;
  margin-bottom: 16px;
}
.about-copy h3 span { color: var(--blue); }
.about-copy p {
  color: var(--text-dim);
  font-size: 15px;
  margin-bottom: 14px;
  text-align: justify;
}
.about-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 18px 0 24px;
}
.about-points li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 12px;
  box-shadow: var(--shadow);
}
.about-points li::before {
  content: "✓";
  flex: none;
  color: var(--blue);
  font-weight: 700;
}

/* 荣誉资质 */
.honor { background: var(--bg-2); }
.honor-block { margin-bottom: clamp(44px, 6vw, 64px); }
.honor-block:last-child { margin-bottom: 0; }
.honor-block-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}
.honor-block-title h3 { font-size: 22px; color: var(--steel-dark); letter-spacing: 1px; }
.hb-tag {
  padding: 4px 14px;
  background: var(--blue);
  color: #fff;
  font-size: 13px;
  letter-spacing: 2px;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}
.hb-tag-person { background: var(--yellow); color: #111; }

.honor-certs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}
.cert-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
  box-shadow: var(--shadow);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.cert-card:hover {
  transform: translateY(-6px);
  border-color: rgba(59, 130, 246, 0.55);
  box-shadow: var(--shadow-hover);
}
.cert-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: #f4f6f8;
  padding: 12px;
  border-bottom: 1px solid var(--line);
  box-sizing: border-box;
}
.cert-card figcaption {
  padding: 12px 14px;
  font-size: 14px;
  color: var(--steel-dark);
  letter-spacing: 1px;
  text-align: center;
  font-weight: 600;
}
.cert-card figcaption::before {
  content: "●";
  color: var(--blue);
  font-size: 10px;
  margin-right: 8px;
  vertical-align: middle;
}

.honor-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px 18px;
}
.honor-list li {
  position: relative;
  padding: 9px 12px 9px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 13.5px;
  color: var(--text);
  transition: background 0.2s, border-color 0.2s;
}
.honor-list li:hover {
  background: rgba(37, 99, 235, 0.06);
  border-color: rgba(59, 130, 246, 0.45);
}
.honor-list li::before {
  content: "";
  position: absolute;
  left: 6px; top: 15px;
  width: 5px; height: 5px;
  background: var(--blue);
}

/* 应用领域 */
.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.app-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  background: var(--card);
  box-shadow: var(--shadow);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.app-card:hover {
  transform: translateY(-6px);
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: var(--shadow-hover);
}
.app-icon { color: var(--blue); font-size: 13px; }
.app-card h3 {
  font-size: 17px;
  color: var(--steel-dark);
  margin: 10px 0 8px;
  letter-spacing: 1px;
}
.app-card p { font-size: 13.5px; color: var(--text-dim); }

/* 服务与售后 */
.service { background: var(--bg-2); }
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.service-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 22px;
  background: var(--card);
  box-shadow: var(--shadow);
  transition: transform 0.25s, border-color 0.25s;
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(59, 130, 246, 0.55);
  box-shadow: var(--shadow-hover);
}
.sc-step {
  display: inline-block;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--blue);
  border: 1px solid rgba(59, 130, 246, 0.4);
  padding: 4px 10px;
  margin-bottom: 14px;
}
.service-card h3 { font-size: 17px; color: var(--steel-dark); margin-bottom: 8px; letter-spacing: 1px; }
.service-card p { font-size: 13.5px; color: var(--text-dim); }

/* CTA 横幅（二级页面底部） */
.cta-banner {
  position: relative;
  background: linear-gradient(120deg, #1d4ed8 0%, #2563eb 55%, #3b82f6 100%);
  border-radius: var(--radius);
  padding: clamp(32px, 4vw, 52px);
  text-align: center;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(37, 99, 235, 0.25);
}
.cta-banner::after {
  content: "";
  position: absolute;
  right: -60px; top: -60px;
  width: 240px; height: 240px;
  border: 30px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}
.cta-banner h3 {
  font-size: clamp(20px, 2.6vw, 30px);
  color: #fff;
  letter-spacing: 2px;
  margin-bottom: 10px;
}
.cta-banner p { color: #dbe3ef; font-size: 14.5px; margin-bottom: 22px; }
.cta-banner .btn-ghost { border-color: rgba(255,255,255,0.7); }

/* 联系我们 */
.contact { background: var(--bg); }
.contact-grid {
  max-width: 960px;
  margin: 0 auto;
}

/* 通用信息块 */
.ci-block {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--blue);
  border-radius: var(--radius);
  padding: 26px 28px;
  box-shadow: var(--shadow);
}
.ci-title {
  font-size: 18px;
  color: var(--steel-dark);
  letter-spacing: 1px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 10px;
}
.ci-title::before {
  content: "";
  width: 4px; height: 16px;
  background: var(--blue);
  border-radius: 2px;
}

/* 联系方式列表 */
.ci-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px 28px;
}
.ci-list li { display: flex; gap: 12px; align-items: flex-start; }
.ci-ico {
  flex: none;
  width: 38px; height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  background: rgba(37, 99, 235, 0.1);
  border-radius: 8px;
}
.ci-list strong { display: block; color: var(--steel-dark); font-size: 14.5px; margin-bottom: 4px; font-weight: 700; }
.ci-list p { font-size: 13.5px; color: var(--text-dim); line-height: 1.65; }
.ci-list a { color: var(--blue); font-weight: 600; }
.ci-list a:hover { text-decoration: underline; }
.ci-list li.ci-wide { grid-column: span 3; }

/* 联系我们响应式 */
@media (max-width: 900px) {
  .ci-list { grid-template-columns: 1fr; }
  .ci-list li.ci-wide { grid-column: span 1; }
}

/* 页脚（保留深色形成对比） */
.site-footer {
  background: #0f172a;
  border-top: 1px solid rgba(148, 163, 184, 0.14);
  padding: clamp(40px, 5vw, 60px) 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 34px;
}
.footer-brand strong {
  font-size: 18px;
  color: #fff;
  letter-spacing: 1px;
}
.footer-brand p {
  margin-top: 10px;
  font-size: 13.5px;
  color: #94a3b8;
  max-width: 30em;
}
.footer-nav h4, .footer-contact h4 {
  font-size: 14px;
  color: #fff;
  letter-spacing: 2px;
  margin-bottom: 14px;
}
.footer-nav a {
  display: block;
  font-size: 13.5px;
  color: #94a3b8;
  padding: 5px 0;
  transition: color 0.2s, padding-left 0.2s;
}
.footer-nav a:hover { color: #60a5fa; padding-left: 6px; }
.footer-contact p { font-size: 13.5px; color: #94a3b8; padding: 4px 0; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid rgba(148, 163, 184, 0.14);
  padding: 18px 0;
  font-size: 12.5px;
  color: #64748b;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(4, 8, 14, 0.94);
  padding: 4vh 3vw;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 92vw;
  max-height: 84vh;
  border: 1px solid rgba(59, 130, 246, 0.4);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}
.lb-close {
  position: absolute;
  top: 20px; right: 24px;
  width: 46px; height: 46px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 4px;
  background: rgba(15, 23, 42, 0.8);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s;
}
.lb-close:hover { background: var(--blue); border-color: var(--blue); }
.lb-caption {
  position: absolute;
  bottom: 3vh;
  font-size: 14px;
  color: #94a3b8;
  letter-spacing: 1px;
}

@media (max-width: 1024px) {
  .data-grid { grid-template-columns: repeat(3, 1fr); }
  .series-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .honor-list { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --header-h: 62px; }

  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: #ffffff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.12);
    padding: 10px 6%;
    transform: translateY(-140%);
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
    pointer-events: none;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .main-nav a {
    display: block;
    padding: 15px 6px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
    min-height: 48px;
    line-height: 1.4;
  }
  .main-nav a::after { display: none; }

  .hero { min-height: calc(100vh - var(--header-h)); }
  .hero-content { padding-top: 48px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); padding-bottom: 48px; }
  .data-grid { grid-template-columns: repeat(2, 1fr); }
  .workshop-layout { flex-direction: column; }
  .workshop-banner { aspect-ratio: 16 / 9; }
  .about-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .gallery-head { flex-direction: column; gap: 6px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .br-desktop { display: none; }
}

@media (max-width: 480px) {
  .series-grid, .product-gallery, .service-grid,
  .honor-certs, .honor-list, .app-grid { grid-template-columns: 1fr; }
  .about-points { grid-template-columns: 1fr; }
  .hero-tags li { font-size: 11.5px; }
  .data-card { padding: 18px 10px 14px; }
}

/* 滚动条（桌面） */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: #eef2f7; }
::-webkit-scrollbar-thumb { background: #c3cfe0; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* 无障碍：减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* 钣金加工 */
.dept-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.dept-intro-grid h2 {
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 800;
  color: var(--steel-dark);
  margin-bottom: 16px;
}
.dept-intro-grid p { color: var(--text-dim); margin-bottom: 14px; }
.dept-intro-img img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.dept-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(20px, 2.6vw, 32px);
}
.dept-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.25s, box-shadow 0.25s;
}
.dept-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.dept-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}
.dept-card-body { padding: 20px 22px 24px; }
.dept-step {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #fff;
  background: var(--blue);
  border-radius: 4px;
  padding: 3px 9px;
  margin-bottom: 10px;
}
.dept-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--steel-dark);
  margin-bottom: 8px;
}
.dept-card-body p { color: var(--text-dim); font-size: 14.5px; }
.dept-contact-bar {
  margin-top: 34px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border-radius: var(--radius);
  padding: 26px 30px;
  text-align: center;
  color: #e2e8f0;
}
.dept-contact-bar strong { color: #fff; }
.dept-contact-bar .dept-tel {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: #93c5fd;
  margin-top: 8px;
}
.feat-panel {
  margin-top: 30px;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow);
}
.feat-panel h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--steel-dark);
  margin-bottom: 12px;
}
.feat-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 10px;
  color: var(--text-dim);
  font-size: 14.5px;
}
.feat-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--blue);
  border-radius: 2px;
}
.adv-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.adv-list li {
  display: flex;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.adv-list li span {
  flex: none;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--blue);
}
.adv-list li p { color: var(--text-dim); font-size: 14.5px; }
.casting-extra { margin-top: clamp(20px, 2.6vw, 32px); }
.spec-text { display: grid; gap: 22px; }
.figure-grid { display: grid; gap: 20px; max-width: 1020px; margin-inline: auto; }
.figure-grid.col-2 { grid-template-columns: repeat(2, 1fr); max-width: 760px; }
.figure-grid.col-3 { grid-template-columns: repeat(3, 1fr); max-width: 1020px; }
.figure-grid.col-4 { grid-template-columns: repeat(4, 1fr); max-width: 1080px; }
.figure-item {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.figure-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
  box-shadow: var(--shadow);
}
.figure-item figcaption { margin-top: auto; padding-top: 10px; }
.figure-caption {
  margin-top: 10px;
}
.figure-caption strong {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--steel-dark);
}
.figure-caption span {
  display: block;
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--text-dim);
}
.figure-panel { margin-top: 26px; }
.line-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(16px, 2vw, 24px);
  max-width: 1160px;
  margin-inline: auto;
}
.line-panel { display: flex; flex-direction: column; min-height: 0; }
.line-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--steel-dark);
  margin-bottom: 6px;
}
.line-subtitle {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.line-imgs {
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  min-height: 0;
}
.line-imgs > * {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.line-imgs img,
.line-right-top img {
  flex: 1 1 auto;
  width: 100%;
  height: 100%;
  min-height: 120px;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
  box-shadow: var(--shadow);
}
.line-img-cap {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-dim);
}
.line-right-top img { flex: 1 1 auto; }
.line-desc {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}
.line-media {
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 16px;
  align-items: stretch;
  min-height: 0;
}
.line-media img {
  width: 100%;
  height: 100%;
  min-height: 160px;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
  box-shadow: var(--shadow);
}
.line-media-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.line-media-text p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}
.line-media-text p:last-child { margin-bottom: 0; }
.line-media-text strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--steel-dark);
  margin-bottom: 4px;
}
.line-media-text span { display: block; color: var(--text-dim); }
.spec-item {
  padding-left: 18px;
  border-left: 3px solid var(--blue);
}
.spec-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--steel-dark);
  margin-bottom: 6px;
}
.spec-item p { color: var(--text-dim); font-size: 14.5px; }
@media (max-width: 1080px) {
  .figure-grid.col-3, .figure-grid.col-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .line-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .dept-intro-grid, .dept-grid, .adv-list { grid-template-columns: 1fr; }
  .figure-grid.col-2, .figure-grid.col-3, .figure-grid.col-4 { grid-template-columns: 1fr; }
  .line-media { grid-template-columns: 1fr; }
}