:root {
  color-scheme: light;
  --color-primary: #0b5cad;
  --color-primary-deep: #062f5c;
  --color-primary-dark: #04203f;
  --color-primary-soft: #e8f1fa;
  --color-accent: #17a974;
  --color-background: #f4f7fb;
  --color-surface: #ffffff;
  --color-text: #16233a;
  --color-muted-text: #5a6b85;
  --color-border: #dce4ef;
  --color-focus: #0b66ff;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", ui-sans-serif, system-ui, sans-serif;
  --font-display: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", ui-sans-serif, system-ui, sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --space-unit: 0.25rem;
  --content-width: 76rem;
  --shadow-card: 0 6px 24px rgba(6, 47, 92, 0.08);
  --shadow-lift: 0 14px 40px rgba(6, 47, 92, 0.16);
}

* { box-sizing: border-box; }

html {
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-body);
  scroll-behavior: smooth;
}

body { margin: 0; min-height: 100dvh; }

img { max-width: 100%; display: block; }

button, input, select, textarea { font: inherit; }

a { color: var(--color-primary); }

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.skip-link {
  left: 1rem;
  position: fixed;
  top: 1rem;
  transform: translateY(-200%);
  z-index: 200;
  background: var(--color-surface);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
}

.skip-link:focus { transform: translateY(0); }

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* ========== 布局工具 ========== */
.container {
  width: min(100% - 3rem, var(--content-width));
  margin-inline: auto;
}

.section { padding-block: 6rem; }
.section--tight { padding-block: 4rem; }
.section--surface { background: var(--color-surface); }

.section-head {
  max-width: 46rem;
  margin-bottom: 3rem;
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-eyebrow::before {
  content: "";
  width: 2rem;
  height: 3px;
  border-radius: 2px;
  background: var(--color-accent);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.2vw, 2.25rem);
  line-height: 1.25;
  margin: 0.75rem 0 0;
  color: var(--color-text);
}

.section-desc {
  color: var(--color-muted-text);
  line-height: 1.8;
  margin: 1rem 0 0;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  background: #094d91;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
  background: transparent;
}

.btn--ghost:hover { background: rgba(255, 255, 255, 0.12); }

.btn--outline {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn--outline:hover { background: var(--color-primary-soft); }

/* ========== 顶部信息条 ========== */
.topbar {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.8125rem;
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 0.5rem;
  flex-wrap: wrap;
}

.topbar a {
  color: inherit;
  text-decoration: none;
}

.topbar a:hover { color: #fff; }

.topbar-group {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.topbar-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}

/* ========== 主导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-primary-deep);
  box-shadow: 0 2px 16px rgba(4, 32, 63, 0.35);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 0.9rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo {
  height: 44px;
  width: auto;
}

.brand-text {
  color: #fff;
  line-height: 1.3;
}

.brand-text strong {
  display: block;
  font-size: 1.0625rem;
  letter-spacing: 0.02em;
}

.brand-text span {
  font-size: 0.6875rem;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-sm);
  color: #fff;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-size: 1.125rem;
  line-height: 1;
}

.site-nav ul {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: block;
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-sm);
  position: relative;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.site-nav a[aria-current="page"] {
  color: #fff;
  font-weight: 700;
}

.site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 1.1rem;
  right: 1.1rem;
  bottom: 0.2rem;
  height: 3px;
  border-radius: 2px;
  background: var(--color-accent);
}

/* ========== Hero 轮播 ========== */
.hero {
  position: relative;
  background: var(--color-primary-dark);
  overflow: hidden;
}

.hero-slides {
  position: relative;
  aspect-ratio: 1920 / 650;
  max-height: 78vh;
  margin-inline: auto;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.7s ease;
  pointer-events: none;
}

.hero-slide[data-active="true"] {
  opacity: 1;
  pointer-events: auto;
  position: relative;
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-dots {
  position: absolute;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%);
  display: flex;
  gap: 0.6rem;
  z-index: 5;
}

.hero-dot {
  width: 2.4rem;
  height: 4px;
  border: none;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.45);
  cursor: pointer;
  padding: 0;
  transition: background 0.25s ease;
}

.hero-dot[aria-pressed="true"] { background: #fff; }

.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: rgba(4, 32, 63, 0.35);
  color: #fff;
  font-size: 1.25rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

.hero-arrow:hover { background: rgba(4, 32, 63, 0.7); }
.hero-arrow--prev { left: 2rem; }
.hero-arrow--next { right: 2rem; }

/* ========== 数据统计带 ========== */
.stats-band {
  background: linear-gradient(120deg, var(--color-primary-deep), var(--color-primary));
  color: #fff;
  position: relative;
  overflow: hidden;
}

.stats-band::after {
  content: "";
  position: absolute;
  right: -6rem;
  top: -6rem;
  width: 22rem;
  height: 22rem;
  border-radius: 50%;
  border: 3rem solid rgba(255, 255, 255, 0.06);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding-block: 3.5rem;
  position: relative;
  z-index: 1;
}

.stat { text-align: center; }

.stat-value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.6vw, 2.75rem);
  font-weight: 800;
  line-height: 1.1;
}

.stat-value small {
  font-size: 0.55em;
  font-weight: 600;
  margin-left: 0.15rem;
}

.stat-label {
  margin-top: 0.5rem;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.9375rem;
}

/* ========== 斜切简介区 ========== */
.split-section {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 4rem;
  align-items: center;
}

.slash-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lift);
}

.slash-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.slash-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(11, 92, 173, 0.25), transparent 55%);
}

.check-list {
  list-style: none;
  margin: 1.75rem 0 2rem;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.check-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  line-height: 1.7;
  color: var(--color-muted-text);
}

.check-list li::before {
  content: "✓";
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 800;
  display: grid;
  place-items: center;
  margin-top: 0.15rem;
}

/* ========== 卡片与网格 ========== */
.grid {
  display: grid;
  gap: 1.75rem;
}

.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift);
}

.card-body { padding: 1.5rem; }

.card-title {
  margin: 0;
  font-size: 1.125rem;
  font-family: var(--font-display);
}

.card-text {
  color: var(--color-muted-text);
  line-height: 1.75;
  font-size: 0.9375rem;
  margin: 0.6rem 0 0;
}

/* ========== 清洁用品主题动效 ========== */
.product-series-section {
  position: relative;
  overflow: hidden;
}

.product-series-section::before {
  content: "";
  position: absolute;
  width: 34rem;
  height: 34rem;
  right: -12rem;
  top: -17rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(23, 169, 116, 0.09), rgba(23, 169, 116, 0) 68%);
  pointer-events: none;
}

.series-intro {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(21rem, 27rem);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  margin-bottom: 3rem;
}

.series-intro .section-head { margin-bottom: 0; }

.cleaning-motion {
  position: relative;
  min-height: 15rem;
  isolation: isolate;
}

.cleaning-motion::before {
  content: "";
  position: absolute;
  inset: 1.7rem 0 0;
  z-index: -1;
  border-radius: 52% 48% 43% 57% / 48% 38% 62% 52%;
  background:
    radial-gradient(circle at 72% 22%, rgba(23, 169, 116, 0.17), transparent 30%),
    radial-gradient(circle at 24% 76%, rgba(11, 92, 173, 0.14), transparent 38%),
    #f5f9fd;
  box-shadow: inset 0 0 0 1px rgba(11, 92, 173, 0.06);
  transform: rotate(-2deg);
}

.cleaning-motion__label {
  position: absolute;
  top: 1.25rem;
  right: 1.35rem;
  z-index: 2;
  color: rgba(6, 47, 92, 0.56);
  font-size: 0.625rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.cleaning-motion__scene {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.cleaning-motion.is-active .cleaning-motion__scene {
  animation: cleaning-scene-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.cleaning-motion__orbit {
  fill: none;
  stroke: rgba(11, 92, 173, 0.13);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 8 11;
  animation: cleaning-orbit 9s linear infinite;
  animation-play-state: paused;
}

.cleaning-motion__shadow {
  fill: rgba(6, 47, 92, 0.1);
  transform-box: fill-box;
  transform-origin: center;
  animation: cleaning-shadow-pulse 3.8s ease-in-out infinite;
  animation-play-state: paused;
}

.cleaning-supply,
.cleaning-supply__pump,
.cleaning-supply__trigger,
.cleaning-spray-drop,
.cleaning-spark {
  transform-box: fill-box;
  transform-origin: center;
}

.cleaning-supply--bottle {
  transform-origin: center bottom;
  animation: cleaning-bottle-bob 3.8s ease-in-out infinite;
  animation-play-state: paused;
}

.cleaning-supply__pump {
  transform-origin: center bottom;
  animation: cleaning-pump 3.8s ease-in-out infinite;
  animation-play-state: paused;
}

.cleaning-supply--spray {
  transform-origin: center bottom;
  animation: cleaning-spray-bob 3.2s ease-in-out 0.35s infinite;
  animation-play-state: paused;
}

.cleaning-supply__trigger {
  transform-origin: left center;
  animation: cleaning-trigger 3.2s ease-in-out infinite;
  animation-play-state: paused;
}

.cleaning-supply--sponge {
  transform-origin: center bottom;
  animation: cleaning-sponge-bounce 2.8s cubic-bezier(0.45, 0, 0.55, 1) 0.2s infinite;
  animation-play-state: paused;
}

.cleaning-supply--brush {
  transform-origin: 80% 80%;
  animation: cleaning-brush-sweep 3.4s ease-in-out 0.5s infinite;
  animation-play-state: paused;
}

.cleaning-spray-drop {
  fill: #63c8ed;
  opacity: 0;
  animation: cleaning-droplet 3.2s ease-out infinite;
  animation-play-state: paused;
}

.cleaning-spray-drop--2 { animation-delay: 0.12s; }
.cleaning-spray-drop--3 { animation-delay: 0.24s; }

.cleaning-spark {
  fill: none;
  stroke: #17a974;
  stroke-width: 3;
  stroke-linecap: round;
  opacity: 0;
  animation: cleaning-sparkle 2.7s ease-in-out infinite;
  animation-play-state: paused;
}

.cleaning-spark--2 { animation-delay: 0.7s; }
.cleaning-spark--3 { animation-delay: 1.35s; }

.cleaning-motion.is-active .cleaning-motion__orbit,
.cleaning-motion.is-active .cleaning-motion__shadow,
.cleaning-motion.is-active .cleaning-supply,
.cleaning-motion.is-active .cleaning-supply__pump,
.cleaning-motion.is-active .cleaning-supply__trigger,
.cleaning-motion.is-active .cleaning-spray-drop,
.cleaning-motion.is-active .cleaning-spark {
  animation-play-state: running;
}

@keyframes cleaning-scene-in {
  from { opacity: 0; transform: translate3d(0, 1.25rem, 0) scale(0.97); }
  to { opacity: 1; transform: translate3d(0, 0, 0) scale(1); }
}

@keyframes cleaning-orbit {
  to { stroke-dashoffset: -76; }
}

@keyframes cleaning-shadow-pulse {
  0%, 100% { opacity: 0.72; transform: scaleX(0.96); }
  50% { opacity: 1; transform: scaleX(1.04); }
}

@keyframes cleaning-bottle-bob {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(-1deg); }
  50% { transform: translate3d(0, -7px, 0) rotate(1deg); }
}

@keyframes cleaning-pump {
  0%, 18%, 30%, 100% { transform: translateY(0); }
  23% { transform: translateY(4px); }
}

@keyframes cleaning-spray-bob {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(1deg); }
  48% { transform: translate3d(0, -9px, 0) rotate(-1.5deg); }
}

@keyframes cleaning-trigger {
  0%, 14%, 30%, 100% { transform: rotate(0); }
  20%, 24% { transform: rotate(12deg); }
}

@keyframes cleaning-droplet {
  0%, 14% { opacity: 0; transform: translate3d(-5px, 2px, 0) scale(0.65); }
  21% { opacity: 0.9; }
  40% { opacity: 0; transform: translate3d(25px, -9px, 0) scale(1); }
  100% { opacity: 0; }
}

@keyframes cleaning-sponge-bounce {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0); }
  48% { transform: translate3d(0, -8px, 0) rotate(-2deg); }
  56% { transform: translate3d(0, -2px, 0) rotate(1deg); }
}

@keyframes cleaning-brush-sweep {
  0%, 100% { transform: translate3d(-7px, 0, 0) rotate(-2deg); }
  50% { transform: translate3d(8px, -3px, 0) rotate(3deg); }
}

@keyframes cleaning-sparkle {
  0%, 16%, 54%, 100% { opacity: 0; transform: scale(0.5) rotate(0); }
  27%, 42% { opacity: 0.92; transform: scale(1) rotate(45deg); }
}

/* 产品系列卡 */
.series-card {
  position: relative;
  display: block;
  text-decoration: none;
  color: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-card);
}

.series-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.series-card:hover img { transform: scale(1.06); }

.series-card-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.75rem;
  background: linear-gradient(180deg, transparent 30%, rgba(4, 32, 63, 0.88));
}

.series-card-overlay h3 {
  margin: 0;
  font-size: 1.25rem;
}

.series-card-overlay p {
  margin: 0.4rem 0 0;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
}

.series-card-tag {
  position: absolute;
  top: 1.25rem;
  left: 1.25rem;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  letter-spacing: 0.06em;
}

/* 产品卡 */
.product-media {
  position: relative;
  display: block;
  overflow: hidden;
  background: #fff;
}

.product-card img {
  aspect-ratio: 1;
  object-fit: cover;
  width: 100%;
  background: #fff;
  transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1), filter 0.35s ease;
}

.product-media__shine {
  position: absolute;
  inset: -35% auto -35% -55%;
  width: 28%;
  pointer-events: none;
  opacity: 0;
  transform: skewX(-18deg);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.7), transparent);
}

.product-card:hover img,
.product-card:focus-visible img {
  transform: scale(1.045) translateY(-2px);
  filter: saturate(1.04);
}

.product-card:hover .product-media__shine,
.product-card:focus-visible .product-media__shine {
  animation: product-clean-shine 0.85s ease-out both;
}

@keyframes product-clean-shine {
  0% { left: -55%; opacity: 0; }
  20% { opacity: 0.75; }
  100% { left: 125%; opacity: 0; }
}

.product-card .card-body { padding: 1.25rem 1.5rem 1.5rem; }

.product-cat {
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.08em;
}

/* 新闻卡 */
.news-card {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
  align-items: center;
  text-decoration: none;
  color: inherit;
}

.news-date {
  text-align: center;
  border-right: 1px solid var(--color-border);
  padding-right: 1.5rem;
}

.news-date strong {
  display: block;
  font-size: 1.9rem;
  font-family: var(--font-display);
  color: var(--color-primary);
  line-height: 1.1;
}

.news-date span {
  color: var(--color-muted-text);
  font-size: 0.8125rem;
}

.news-card h3 {
  margin: 0;
  font-size: 1.0625rem;
  transition: color 0.2s ease;
}

.news-card:hover h3 { color: var(--color-primary); }

.news-card p {
  margin: 0.4rem 0 0;
  color: var(--color-muted-text);
  font-size: 0.875rem;
  line-height: 1.7;
}

.news-tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-accent);
  background: rgba(23, 169, 116, 0.1);
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  margin-right: 0.5rem;
  vertical-align: 0.1em;
}

/* ========== 页头横幅（内页） ========== */
.page-banner {
  position: relative;
  background: linear-gradient(115deg, var(--color-primary-dark) 0%, var(--color-primary-deep) 55%, var(--color-primary) 100%);
  color: #fff;
  padding-block: 5.5rem;
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  right: -4rem;
  bottom: -8rem;
  width: 26rem;
  height: 26rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
}

.page-banner::after {
  content: "";
  position: absolute;
  right: 12rem;
  top: -6rem;
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  border: 1.5rem solid rgba(255, 255, 255, 0.06);
}

.page-banner h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-family: var(--font-display);
  position: relative;
  z-index: 1;
}

.breadcrumb {
  margin-top: 0.85rem;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.75);
  position: relative;
  z-index: 1;
}

.breadcrumb a { color: inherit; text-decoration: none; }
.breadcrumb a:hover { color: #fff; }

/* ========== 资质徽章 ========== */
.cert-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.cert-item {
  display: flex;
  gap: 1rem;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.cert-icon {
  flex-shrink: 0;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 1.4rem;
}

.cert-item strong { display: block; font-size: 1rem; }
.cert-item span { color: var(--color-muted-text); font-size: 0.8125rem; }

/* ========== CTA 带 ========== */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary-deep), var(--color-primary));
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}

.cta-band::after {
  content: "";
  position: absolute;
  left: -5rem;
  bottom: -9rem;
  width: 20rem;
  height: 20rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}

.cta-band h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
}

.cta-band p {
  margin: 0.6rem 0 0;
  color: rgba(255, 255, 255, 0.8);
}

.cta-phone {
  font-size: 1.75rem;
  font-weight: 800;
  color: #fff;
  text-decoration: none;
  white-space: nowrap;
}

/* ========== 时间轴 ========== */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.55rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: var(--color-border);
}

.timeline li {
  position: relative;
  padding-left: 2.5rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35rem;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  background: var(--color-surface);
  border: 4px solid var(--color-primary);
}

.timeline strong {
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 1.125rem;
}

.timeline p {
  margin: 0.35rem 0 0;
  color: var(--color-muted-text);
  line-height: 1.75;
}

/* ========== 品牌矩阵 ========== */
.brand-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.brand-item {
  text-align: center;
  padding: 2.25rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.brand-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lift);
}

.brand-item-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary-deep);
}

.brand-item p {
  color: var(--color-muted-text);
  font-size: 0.875rem;
  line-height: 1.7;
  margin: 0.75rem 0 0;
}

/* ========== OEM 步骤 ========== */
.steps-flow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1.25rem;
  counter-reset: step;
}

.step-item {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.25rem 1.5rem;
  text-align: center;
  counter-increment: step;
}

.step-item::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.9;
}

.step-item:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -1.05rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-accent);
  font-weight: 800;
  z-index: 2;
}

.step-item h3 {
  margin: 0.75rem 0 0;
  font-size: 1rem;
}

.step-item p {
  margin: 0.5rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-muted-text);
  line-height: 1.65;
}

/* ========== 表单 ========== */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-field { display: grid; gap: 0.5rem; }
.form-field--full { grid-column: 1 / -1; }

.form-field label {
  font-weight: 600;
  font-size: 0.875rem;
}

.form-field input,
.form-field textarea {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  background: var(--color-surface);
  color: var(--color-text);
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--color-primary);
  outline: 3px solid rgba(11, 102, 255, 0.2);
}

.form-success {
  display: none;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  background: rgba(23, 169, 116, 0.12);
  color: #0d7a53;
  font-weight: 600;
}

.form-success[data-state="complete"] { display: block; }

/* ========== 联系信息卡 ========== */
.contact-item {
  display: flex;
  gap: 1.1rem;
  align-items: flex-start;
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.contact-item .cert-icon { font-size: 1.25rem; }

.contact-item strong { display: block; margin-bottom: 0.25rem; }
.contact-item p { margin: 0; color: var(--color-muted-text); line-height: 1.7; font-size: 0.9375rem; }
.contact-item a { color: var(--color-muted-text); text-decoration: none; }
.contact-item a:hover { color: var(--color-primary); }

/* ========== 筛选 Tab ========== */
.filter-tabs {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.filter-tab {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-muted-text);
  border-radius: 999px;
  padding: 0.6rem 1.4rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all 0.2s ease;
}

.filter-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-tab[aria-pressed="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.75);
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 3rem;
  padding-block: 4rem 3rem;
}

.footer-brand img { height: 40px; margin-bottom: 1rem; }

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.8;
  margin: 0;
}

.footer-col h3 {
  color: #fff;
  font-size: 1rem;
  margin: 0 0 1.25rem;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
  font-size: 0.875rem;
}

.footer-col a {
  color: inherit;
  text-decoration: none;
}

.footer-col a:hover { color: #fff; }

.footer-contact li {
  display: flex;
  gap: 0.6rem;
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-block: 1.25rem;
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: rgba(255, 255, 255, 0.55);
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: 0.5rem 1rem;
  flex-wrap: wrap;
}

.footer-legal-item:empty { display: none; }

.footer-bottom a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-bottom a:hover { color: #fff; }

/* ========== 响应式 ========== */
@media (max-width: 1100px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .series-intro { grid-template-columns: minmax(0, 1fr) minmax(19rem, 23rem); gap: 2.5rem; }
  .brand-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-flow { grid-template-columns: repeat(3, 1fr); }
  .step-item:not(:last-child)::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .topbar-group:first-child .topbar-item:first-child { display: none; }
}

@media (max-width: 900px) {
  .split-section { grid-template-columns: 1fr; gap: 2.5rem; }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .cert-list { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding-block: 4rem; }
  .series-intro { grid-template-columns: 1fr; gap: 1.5rem; margin-bottom: 2.25rem; }
  .series-intro .section-head { margin-inline: auto; text-align: center; }
  .cleaning-motion { width: min(100%, 29rem); min-height: 0; margin-inline: auto; }
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--color-primary-deep);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding: 0.75rem 1.5rem 1.25rem;
  }
  .site-nav[data-open="true"] { display: block; }
  .site-nav ul { flex-direction: column; gap: 0; }
  .site-nav a { padding: 0.85rem 0.5rem; border-radius: 0; }
  .site-nav a[aria-current="page"]::after { left: 0.5rem; right: auto; width: 2.5rem; }
  .grid--4, .grid--3, .grid--2, .form-grid { grid-template-columns: 1fr; }
  .steps-flow { grid-template-columns: 1fr; }
  .brand-grid { grid-template-columns: 1fr; }
  .news-card { grid-template-columns: 1fr; gap: 0.75rem; }
  .news-date { border-right: none; border-bottom: 1px solid var(--color-border); padding: 0 0 0.75rem; text-align: left; display: flex; gap: 0.75rem; align-items: baseline; }
  .cta-band { padding: 2.25rem; }
  .hero-arrow { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .topbar-inner { justify-content: center; }
  .topbar-group:first-child { display: none; }
}

/* ========== 新闻缩略图卡片 ========== */
.news-thumb-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.card-media {
  overflow: hidden;
  position: relative;
}

.news-thumb {
  aspect-ratio: 3 / 2;
  object-fit: cover;
  width: 100%;
  transition: transform 0.5s ease;
}

.news-thumb-card:hover .news-thumb { transform: scale(1.06); }

.news-thumb-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(6, 47, 92, 0.85);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  letter-spacing: 0.05em;
  backdrop-filter: blur(4px);
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-muted-text);
  margin-bottom: 0.6rem;
}

.news-thumb-card h3 {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.5;
  transition: color 0.2s ease;
}

.news-thumb-card:hover h3 { color: var(--color-primary); }

.news-thumb-card p {
  margin: 0.5rem 0 0;
  color: var(--color-muted-text);
  font-size: 0.875rem;
  line-height: 1.7;
}

.news-more-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1rem;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.875rem;
}

.news-more-link .icon { width: 1rem; height: 1rem; transition: transform 0.2s ease; }
.news-thumb-card:hover .news-more-link .icon { transform: translateX(4px); }

/* ========== 新闻列表大卡 ========== */
.news-list-card {
  display: grid;
  grid-template-columns: 19rem 1fr;
  text-decoration: none;
  color: inherit;
  align-items: stretch;
}

.news-list-card .card-media { height: 100%; }

.news-list-card .news-thumb {
  aspect-ratio: auto;
  height: 100%;
  min-height: 12rem;
}

.news-list-card .card-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.75rem 2rem;
}

.news-list-card h3 {
  font-size: 1.1875rem;
}

/* ========== 文章详情页 ========== */
.article-container {
  max-width: 54rem;
  margin-inline: auto;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--color-muted-text);
  font-size: 0.875rem;
}

.article-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lift);
  margin: 2.25rem 0;
}

.article-cover img {
  width: 100%;
  aspect-ratio: 21 / 10;
  object-fit: cover;
}

.article-body {
  min-width: 0;
  overflow-wrap: anywhere;
}

.article-body img,
.article-body video,
.article-body iframe {
  max-width: 100%;
}

.article-body img { display: inline; }

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1.75rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}

.article-nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 600;
  max-width: 48%;
}

.article-nav a span {
  color: var(--color-muted-text);
  font-weight: 400;
  font-size: 0.875rem;
  display: block;
}

.article-nav .icon { width: 1.1rem; height: 1.1rem; flex-shrink: 0; }

@media (max-width: 768px) {
  .news-list-card { grid-template-columns: 1fr; }
  .news-list-card .news-thumb { aspect-ratio: 16 / 9; min-height: 0; }
  .article-nav a { max-width: 100%; }
}

/* ========== 导航二级下拉菜单 ========== */
.has-sub { position: relative; }

/* 悬停桥接区，防止鼠标移向下拉时断开 */
.has-sub::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 0.6rem;
}

.nav-caret {
  width: 0.8rem;
  height: 0.8rem;
  margin-left: 0.3rem;
  vertical-align: -0.08em;
  transition: transform 0.2s ease;
}

.has-sub:hover .nav-caret,
.has-sub:focus-within .nav-caret { transform: rotate(180deg); }

.submenu {
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 50%;
  transform: translateX(-50%) translateY(0.5rem);
  min-width: 13.5rem;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lift);
  border: 1px solid var(--color-border);
  padding: 0.5rem;
  flex-direction: column;
  gap: 0.125rem;
  list-style: none;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: 300;
}

.submenu::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: #fff;
  border-left: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
}

.has-sub:hover .submenu,
.has-sub:focus-within .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  display: flex;
}

.site-nav .submenu a {
  color: var(--color-text);
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  font-size: 0.875rem;
}

.site-nav .submenu a:hover {
  background: var(--color-surface);
  color: var(--color-primary);
}

.site-nav .submenu a::after { display: none; }

/* 移动端：二级菜单静态展开 */
@media (max-width: 768px) {
  .has-sub::after { display: none; }
  .nav-caret { display: none; }
  .submenu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    display: flex;
    background: rgba(255, 255, 255, 0.06);
    border: none;
    box-shadow: none;
    border-radius: var(--radius-sm);
    margin: 0.25rem 0 0.5rem;
    padding: 0.35rem 0.5rem;
  }
  .submenu::before { display: none; }
  .site-nav .submenu a {
    color: rgba(255, 255, 255, 0.78);
    padding: 0.6rem 0.5rem 0.6rem 1.5rem;
    font-size: 0.875rem;
  }
  .site-nav .submenu a:hover { background: rgba(255, 255, 255, 0.1); color: #fff; }
}

/* ========== 产品卡可点击（进入产品详情） ========== */
a.product-card {
  text-decoration: none;
  color: inherit;
}

.product-card .card-title { transition: color 0.2s ease; }

a.product-card:hover .card-title { color: var(--color-primary); }

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.8125rem;
}

.product-link .icon { width: 0.9rem; height: 0.9rem; transition: transform 0.2s ease; }
a.product-card:hover .product-link .icon { transform: translateX(3px); }

/* ========== 产品详情图集 ========== */
.product-detail-layout { align-items: start; }

.product-gallery { min-width: 0; }

.product-gallery-main {
  background: #f4f7fb;
  box-shadow: 0 18px 48px rgba(15, 46, 82, 0.12);
}

.product-gallery-main::before { pointer-events: none; }

.product-gallery-main img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: #f4f7fb;
}

.product-gallery-thumbs {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  padding: 0.2rem 0 0.35rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.product-gallery-thumb {
  flex: 0 0 5.25rem;
  width: 5.25rem;
  height: 5.25rem;
  padding: 0.25rem;
  border: 2px solid transparent;
  border-radius: 0.65rem;
  background: #fff;
  cursor: pointer;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.product-gallery-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-gallery-thumb:hover { transform: translateY(-2px); }

.product-gallery-thumb.is-active {
  border-color: var(--color-primary);
  box-shadow: 0 8px 20px rgba(11, 92, 173, 0.14);
}

.product-gallery-thumb:focus-visible {
  outline: 3px solid rgba(11, 92, 173, 0.25);
  outline-offset: 2px;
}

.product-gallery.has-single-image .product-gallery-thumbs { display: none; }

.product-detail-copy { padding-top: 1rem; }
.product-detail-action { margin-top: 1.75rem; }

@media (max-width: 768px) {
  .product-gallery-thumb {
    flex-basis: 4.5rem;
    width: 4.5rem;
    height: 4.5rem;
  }
  .product-detail-copy { padding-top: 0; }
}

/* ========== 线性图标（Lucide 风格 SVG） ========== */
.icon {
  width: 1em;
  height: 1em;
  flex-shrink: 0;
}

.cert-icon .icon { width: 1.5rem; height: 1.5rem; }

.topbar-item .icon { width: 0.875rem; height: 0.875rem; opacity: 0.85; }

.footer-contact .icon { width: 1rem; height: 1rem; margin-top: 0.22rem; opacity: 0.75; }

.cta-phone {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.cta-phone .icon { width: 1.5rem; height: 1.5rem; }

.contact-item .cert-icon .icon { width: 1.4rem; height: 1.4rem; }

.form-success .icon {
  width: 1.15rem;
  height: 1.15rem;
  vertical-align: -0.22em;
  margin-right: 0.4rem;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}