/* 亚强机械 — 蓝色工业风 */
:root {
  --blue-950: #051525;
  --blue-900: #0a2540;
  --blue-800: #0d3a5c;
  --blue-700: #145a8a;
  --blue-600: #1a73b5;
  --blue-500: #2d8fd4;
  --blue-400: #5dade2;
  --steel: #8ba4b8;
  --steel-light: #c5d4e0;
  --white: #f4f8fb;
  --text: #1a2d3d;
  --text-muted: #5a7085;
  --border: rgba(45, 143, 212, 0.2);
  --shadow: 0 12px 40px rgba(5, 21, 37, 0.25);
  --radius: 4px;
  --container: min(1120px, 92vw);
  --header-h: 72px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
}

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

a {
  color: var(--blue-600);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--blue-500);
}

.container {
  width: var(--container);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(5, 21, 37, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.08em;
}

.logo:hover {
  color: var(--blue-400);
}

.logo-text {
  line-height: 1;
  display: inline-flex;
  align-items: center;
}

.logo-mark {
  display: block;
  flex-shrink: 0;
  height: calc(var(--header-h) * 0.62);
  width: auto;
  object-fit: contain;
  object-position: center center;
  /* 光学对齐：略下移，使 YQ 中心线与「亚强机械」文字中心对齐 */
  position: relative;
  top: 0.06em;
  border: none;
  outline: none;
  box-shadow: none;
  filter: none;
  -webkit-filter: none;
  background: none;
}

.site-nav {
  display: flex;
  gap: 0.85rem;
  align-items: center;
}

.site-nav > a,
.site-nav .nav-parent {
  color: var(--steel-light);
  font-size: 0.82rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}

.site-nav > a:hover,
.site-nav > a.active,
.site-nav .nav-parent:hover,
.site-nav .nav-parent.active {
  color: var(--white);
}

.site-nav > a.active::after,
.site-nav .nav-parent.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--blue-500);
}

.nav-item.has-dropdown {
  position: relative;
}

.nav-item.has-dropdown .nav-parent {
  padding-right: 14px;
}

.nav-item.has-dropdown .nav-parent::before {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  margin-top: -2px;
  border: 4px solid transparent;
  border-top-color: var(--steel);
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 9rem;
  list-style: none;
  margin: 0;
  padding: 0.35rem 0;
  background: var(--blue-900);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 200;
}

.nav-item.has-dropdown::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 12px;
}

.nav-item.has-dropdown:hover .nav-dropdown,
.nav-item.has-dropdown:focus-within .nav-dropdown,
.nav-item.has-dropdown.open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: 0.55rem 1.25rem;
  color: var(--steel-light);
  font-size: 0.9rem;
  white-space: nowrap;
}

.nav-dropdown a:hover,
.nav-dropdown a.active {
  color: var(--white);
  background: rgba(45, 143, 212, 0.12);
}

.nav-dropdown a.active::after {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
}

/* Hero */
.hero {
  position: relative;
  min-height: 92vh;
  padding-top: var(--header-h);
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: var(--white);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(5, 21, 37, 0.97) 0%, rgba(10, 37, 64, 0.85) 45%, rgba(20, 90, 138, 0.5) 100%),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 80px,
      rgba(93, 173, 226, 0.03) 80px,
      rgba(93, 173, 226, 0.03) 81px
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 80px,
      rgba(93, 173, 226, 0.03) 80px,
      rgba(93, 173, 226, 0.03) 81px
    ),
    linear-gradient(160deg, var(--blue-950), var(--blue-800));
}

/* Hero carousel */
.hero-with-carousel .hero-carousel {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.carousel-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
  pointer-events: none;
}

.carousel-slide.is-active {
  opacity: 1;
  pointer-events: auto;
}

.carousel-slide-bg {
  width: 100%;
  height: 100%;
  background-color: #051525;
  background-image: url("../images/home/hero-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.carousel-slide-bg-2 {
  background-color: #051525;
  background-image: url("../images/home/hero-2.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.carousel-slide-bg-3 {
  background-color: #051525;
  background-image: url("../images/home/hero-3.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.carousel-dots {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
  z-index: 3;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.carousel-dot.is-active {
  background: var(--blue-400);
  border-color: var(--blue-400);
  transform: scale(1.15);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius);
  background: rgba(5, 21, 37, 0.45);
  color: var(--white);
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.carousel-btn:hover {
  background: rgba(26, 115, 181, 0.55);
  border-color: var(--blue-400);
}

.carousel-prev {
  left: max(1rem, calc((100% - var(--container)) / 2 - 3rem));
}

.carousel-next {
  right: max(1rem, calc((100% - var(--container)) / 2 - 3rem));
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-bg-overlay {
  z-index: 1;
  /* 深蓝品牌蒙版：融合工厂实拍色调 + 文字区压暗，保证标题/按钮清晰可读 */
  background:
    linear-gradient(
      105deg,
      rgba(5, 21, 37, 0.9) 0%,
      rgba(8, 32, 56, 0.82) 28%,
      rgba(13, 58, 92, 0.58) 58%,
      rgba(20, 90, 138, 0.32) 100%
    ),
    linear-gradient(
      180deg,
      rgba(5, 21, 37, 0.45) 0%,
      rgba(10, 37, 64, 0.22) 42%,
      rgba(5, 21, 37, 0.62) 100%
    );
}

.hero-content,
.hero-stats {
  position: relative;
  z-index: 2;
}

.hero-bg::after {
  content: "";
  position: absolute;
  right: -10%;
  top: 20%;
  width: 55%;
  height: 60%;
  background: radial-gradient(ellipse, rgba(45, 143, 212, 0.15), transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 4rem 0 2rem;
}

.hero-tag {
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  color: var(--blue-400);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  font-weight: 700;
  margin: 0 0 1rem;
  letter-spacing: 0.12em;
}

.hero-sub {
  max-width: 40rem;
  font-size: 1.1rem;
  color: var(--steel-light);
  font-weight: 300;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

.stat {
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 2rem;
  color: var(--blue-400);
  font-weight: 600;
}

.stat span {
  font-size: 0.9rem;
  color: var(--steel);
}

.section-home-intro {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.home-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: stretch;
}

.home-video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  min-height: 0;
  background: var(--blue-950);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  align-self: stretch;
}

.home-video-placeholder {
  width: 100%;
  height: 100%;
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, var(--blue-900), var(--blue-800));
  border: 1px dashed rgba(93, 173, 226, 0.35);
  color: var(--steel);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-align: center;
  padding: 1.5rem;
  box-sizing: border-box;
}

/* 16:9 容器内铺满，消除上下黑边 */
.home-video-wrap iframe,
.home-video-wrap video,
.home-video-wrap .home-bilibili-player {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.home-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: linear-gradient(145deg, var(--blue-900), var(--blue-800));
}

.home-video.video-missing {
  min-height: 280px;
}

.home-video-hint {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.home-video-hint code {
  font-size: 0.8rem;
}

.home-intro-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-self: stretch;
  height: auto;
  min-height: 100%;
  box-sizing: border-box;
  padding: 1.25rem 0.5rem 1.25rem 0.25rem;
  gap: 0.15rem;
}

.home-intro-text h2 {
  margin: 0 0 1.15rem;
  color: var(--blue-900);
  font-size: clamp(1.6rem, 2.5vw, 2rem);
}

.home-intro-slogan {
  margin: 0 0 1.35rem;
  color: #0f5b9c;
  font-weight: 700;
  font-size: 1.2em;
  line-height: 1.7;
}

.home-intro-text p {
  color: var(--text-muted);
  margin: 0 0 1.35rem;
  line-height: 1.9;
}

.home-intro-list {
  margin: 0.25rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--text-muted);
  line-height: 1.9;
}

.home-intro-list li {
  position: relative;
  padding-left: 1.1rem;
  margin-bottom: 0.65rem;
}

.home-intro-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--blue-600);
  font-weight: 700;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s, border-color 0.2s;
  font-family: inherit;
}

.btn-primary {
  background: var(--blue-500);
  color: var(--white);
  border-color: var(--blue-500);
}

.btn-primary:hover {
  background: var(--blue-600);
  border-color: var(--blue-600);
  color: var(--white);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn-outline:hover {
  border-color: var(--blue-400);
  color: var(--blue-400);
}

.btn-light {
  background: var(--white);
  color: var(--blue-800);
  border-color: var(--white);
}

.btn-light:hover {
  background: var(--steel-light);
  color: var(--blue-900);
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: linear-gradient(180deg, #eef4f9 0%, var(--white) 100%);
}

.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--blue-600);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.section-head {
  text-align: center;
  max-width: 36rem;
  margin: 0 auto 3rem;
}

.section-head h2,
.section h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  color: var(--blue-900);
  margin: 0 0 0.75rem;
}

.section-head p {
  color: var(--text-muted);
  margin: 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  gap: 2rem 3rem;
  align-items: start;
}

.grid-2 .section-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  margin: 0;
  padding-top: 0.5rem;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  margin-top: 1rem;
}

.link-arrow::after {
  content: "→";
  transition: transform 0.2s;
}

.link-arrow:hover::after {
  transform: translateX(4px);
}

.about-card {
  background: var(--blue-900);
  color: var(--white);
  padding: 2rem;
  border-radius: var(--radius);
  border-left: 4px solid var(--blue-500);
  box-shadow: var(--shadow);
}

.about-card h3 {
  margin-top: 0;
  font-size: 1.15rem;
}

.about-card ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--steel-light);
}

/* Products grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.product-card {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 2rem;
  border-radius: var(--radius);
  transition: box-shadow 0.25s, border-color 0.25s;
}

.product-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--blue-400);
}

.product-icon {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--blue-500);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.product-card h3 {
  margin: 0 0 0.75rem;
  color: var(--blue-900);
}

.product-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.product-card a {
  font-size: 0.9rem;
  font-weight: 500;
}

/* CTA */
.section-cta {
  background: linear-gradient(135deg, var(--blue-800), var(--blue-950));
  color: var(--white);
  padding: 4rem 0;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.cta-inner h2 {
  color: var(--white);
  margin-bottom: 0.5rem;
}

.cta-inner p {
  margin: 0;
  color: var(--steel-light);
}

/* Page hero (inner pages) */
.page-hero {
  padding: calc(var(--header-h) + 3rem) 0 3rem;
  background: linear-gradient(180deg, var(--blue-950), var(--blue-800));
  color: var(--white);
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--steel);
  margin-bottom: 1rem;
}

.breadcrumb a {
  color: var(--blue-400);
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin: 0 0 0.5rem;
  letter-spacing: 0.06em;
}

.page-lead {
  color: var(--steel-light);
  margin: 0;
  max-width: 40rem;
}

.content-block {
  max-width: 48rem;
}

.content-block p {
  color: var(--text-muted);
}

.content-block code {
  font-size: 0.9em;
  background: #e8f0f7;
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.text-center {
  text-align: center;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.value-item {
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
}

.value-item h3 {
  color: var(--blue-700);
  margin-top: 0;
}

.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 2px solid var(--blue-400);
  padding-left: 1.5rem;
}

.timeline li {
  position: relative;
  padding-bottom: 1.5rem;
  color: var(--text-muted);
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -1.65rem;
  top: 0.45rem;
  width: 10px;
  height: 10px;
  background: var(--blue-500);
  border-radius: 50%;
}

.timeline span {
  display: inline-block;
  font-weight: 600;
  color: var(--blue-700);
  min-width: 3.5rem;
  margin-right: 0.5rem;
}

/* Product detail */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.product-detail.reverse {
  direction: rtl;
}

.product-detail.reverse > * {
  direction: ltr;
}

.product-detail-text ul {
  color: var(--text-muted);
}

.placeholder-image {
  aspect-ratio: 4/3;
  background: linear-gradient(145deg, var(--blue-900), var(--blue-700));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--steel);
  font-size: 0.9rem;
  border: 1px dashed var(--border);
}

/* Certificates */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.cert-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(10, 37, 64, 0.06);
}

.cert-thumb {
  height: 160px;
  background: linear-gradient(135deg, #dceaf5, #b8d4ea);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-700);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.cert-card h3 {
  margin: 1rem 1.25rem 0.5rem;
  color: var(--blue-900);
}

.cert-card p {
  margin: 0.25rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.cert-card p:last-child {
  margin-bottom: 1.25rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1.5rem;
  margin: 0 0 2rem;
}

.contact-info dt {
  font-weight: 600;
  color: var(--blue-800);
}

.contact-info dd {
  margin: 0;
  color: var(--text-muted);
}

.map-placeholder {
  aspect-ratio: 16/10;
  background: var(--blue-900);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--steel);
  font-size: 0.9rem;
  text-align: center;
  padding: 1rem;
}

.contact-page-hero.page-hero {
  padding: 2rem 0 2.5rem;
}

.contact-craft-banner {
  padding: calc(var(--header-h) + 2.5rem) 0 2.5rem;
  background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-800) 55%, var(--blue-700) 100%);
  color: var(--white);
  border-bottom: 1px solid var(--border);
}

.contact-craft-lead {
  margin: 0 0 1rem;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.contact-craft-text {
  margin: 0;
  max-width: 48rem;
  color: var(--steel-light);
  font-weight: 300;
  line-height: 1.85;
}

.contact-info-simple h2 {
  margin-top: 0;
}

.contact-simple-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.contact-simple-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 1.05rem;
  color: var(--text);
}

.contact-simple-list li:last-child {
  border-bottom: none;
}

.contact-simple-label {
  min-width: 3rem;
  font-weight: 600;
  color: var(--blue-800);
}

.contact-map-wrap {
  min-height: 0;
}

.contact-map-preview-link {
  display: block;
  flex: 1 1 auto;
  height: 12.5rem;
  min-height: 12.5rem;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--blue-950);
}

.contact-map-preview-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}

.contact-map-caption {
  margin: 0.5rem 0 0;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.contact-map-iframe {
  width: 100%;
  height: 12.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--blue-950);
}

.contact-map-links {
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.contact-page-grid {
  align-items: start;
}

body:not(.story-page) .contact-page-grid .contact-info-simple {
  padding: 0.85rem 1.5rem;
  height: fit-content;
}

body:not(.story-page) .contact-page-grid .contact-map-wrap {
  padding: 0.85rem 1.5rem;
  display: flex;
  flex-direction: column;
  height: 100%;
  box-sizing: border-box;
}

.contact-page-grid .contact-map-iframe {
  width: 100%;
  flex: 1 1 auto;
  height: 12.5rem;
  min-height: 12.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--blue-950);
}

.contact-page-grid .contact-map-preview-link {
  flex: 1 1 auto;
  height: 12.5rem;
  min-height: 12.5rem;
}

.section-tech-list {
  padding-top: 2rem;
}

.tech-list-heading {
  font-size: 1.35rem;
  color: var(--blue-900);
  margin: 0 0 1.5rem;
}

.tech-article-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.tech-article-card {
  padding: 1.5rem 1.75rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-left: 4px solid var(--blue-500);
  box-shadow: 0 4px 20px rgba(5, 21, 37, 0.06);
}

.tech-article-card h3 {
  margin: 0.5rem 0 0.75rem;
  font-size: 1.15rem;
}

.tech-article-card h3 a {
  color: var(--blue-900);
}

.tech-article-card h3 a:hover {
  color: var(--blue-600);
}

.tech-article-card p {
  margin: 0 0 0.75rem;
  color: var(--text-muted);
}

.tech-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.tech-article-tag {
  padding: 0.15rem 0.55rem;
  background: rgba(45, 143, 212, 0.12);
  color: var(--blue-700);
  border-radius: 2px;
  font-weight: 500;
}

.tech-empty {
  color: var(--text-muted);
}

.tech-article-meta-line {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0 0 0.5rem;
}

.tech-article-body {
  max-width: 42rem;
}

.contact-form-wrap h2 {
  margin-top: 0;
}

.form-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.contact-form label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--blue-900);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--blue-500);
}

.contact-form button {
  width: 100%;
  margin-top: 0.5rem;
}

/* Footer */
.site-footer {
  background: var(--blue-950);
  color: var(--steel);
  padding: 3rem 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.footer-brand strong {
  display: block;
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.footer-grid h4 {
  color: var(--white);
  font-size: 0.95rem;
  margin: 0 0 1rem;
}

.footer-grid p {
  margin: 0 0 0.35rem;
  color: var(--steel);
  font-size: 0.9rem;
}

.footer-grid a {
  display: block;
  color: var(--steel);
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.footer-grid a:hover {
  color: var(--blue-400);
}

.footer-bottom {
  padding: 1.25rem 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.footer-bottom a {
  color: var(--steel);
}

.footer-bottom a:hover {
  color: var(--blue-400);
}

main {
  min-height: 50vh;
}

/* 产品页左侧副导航（与主导航一致） */
.layout-with-sidebar {
  display: flex;
  padding-top: var(--header-h);
  align-items: stretch;
  min-height: calc(100vh - var(--header-h));
}

.sub-nav {
  width: 240px;
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--blue-950) 0%, var(--blue-900) 100%);
  border-right: 1px solid var(--border);
  padding: 1.75rem 0 2rem;
  position: sticky;
  top: var(--header-h);
  align-self: flex-start;
  max-height: calc(100vh - var(--header-h));
  overflow-y: auto;
}

.sub-nav-title {
  margin: 0 1.5rem 1rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--steel);
  text-transform: uppercase;
}

.sub-nav > a,
.sub-nav-parent {
  display: block;
  padding: 0.65rem 1.5rem;
  color: var(--steel-light);
  font-size: 0.95rem;
  font-weight: 500;
  border-left: 3px solid transparent;
}

.sub-nav-child {
  display: block;
  padding: 0.5rem 1.5rem 0.5rem 2.25rem;
  color: var(--steel);
  font-size: 0.88rem;
  border-left: 3px solid transparent;
}

.sub-nav > a:hover,
.sub-nav-parent:hover,
.sub-nav-child:hover {
  color: var(--white);
  background: rgba(45, 143, 212, 0.08);
}

.sub-nav > a.active,
.sub-nav-parent.active,
.sub-nav-child.active {
  color: var(--white);
  border-left-color: var(--blue-500);
  background: rgba(45, 143, 212, 0.12);
}

.sub-nav-group {
  margin-bottom: 0.25rem;
}

.sidebar-main {
  flex: 1;
  min-width: 0;
}

.sidebar-main .page-hero-compact {
  padding-top: 2.5rem;
  padding-bottom: 2rem;
}

.sidebar-main .page-hero-compact .container {
  width: min(900px, 88vw);
  margin-inline: auto;
}

.sidebar-main .section .container {
  width: min(900px, 88vw);
  margin-inline: auto;
}

.section-home-links {
  padding-bottom: 4rem;
}

/* Responsive */
@media (max-width: 900px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-2 .section-label {
    writing-mode: horizontal-tb;
    transform: none;
  }

  .product-grid,
  .values-grid {
    grid-template-columns: 1fr;
  }

  .product-detail,
  .product-detail.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .cert-grid,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .home-intro-grid {
    grid-template-columns: 1fr;
  }

  .home-intro-text {
    min-height: 0;
    height: auto;
  }

  .carousel-prev,
  .carousel-next {
    display: none;
  }

  .layout-with-sidebar {
    flex-direction: column;
  }

  .sub-nav {
    width: 100%;
    position: static;
    max-height: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    padding: 1rem 0;
  }

  .sub-nav-title {
    width: 100%;
  }

  .sub-nav-group {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--blue-950);
    flex-direction: column;
    padding: 1.5rem;
    gap: 0;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s, opacity 0.3s;
  }

  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav > a,
  .site-nav .nav-parent {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border);
    width: 100%;
  }

  .nav-item.has-dropdown {
    width: 100%;
    border-bottom: 1px solid var(--border);
  }

  .nav-item.has-dropdown .nav-parent {
    display: block;
    width: 100%;
  }

  .nav-dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    border: none;
    box-shadow: none;
    background: rgba(0, 0, 0, 0.2);
    display: none;
    padding-left: 0.5rem;
  }

  .nav-item.has-dropdown.open .nav-dropdown {
    display: block;
  }

  .nav-item.has-dropdown::after {
    display: none;
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ========== 合作模式单页 ========== */
.coop-banner {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
  color: var(--white);
}

.coop-banner-media {
  position: absolute;
  inset: 0;
  background:
    url("images/coop/banner.jpg") center / cover no-repeat,
    linear-gradient(135deg, #0a0e14 0%, #1a2330 40%, #2a3544 100%);
  background-size: cover;
  background-position: center right;
  filter: contrast(1.05);
}

.coop-banner-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(8, 12, 18, 0.72) 0%, rgba(8, 12, 18, 0.45) 42%, rgba(8, 12, 18, 0.28) 100%),
    linear-gradient(180deg, rgba(5, 10, 16, 0.35) 0%, transparent 30%, rgba(5, 10, 16, 0.45) 100%);
  pointer-events: none;
}

.coop-banner-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
  padding-left: 36%;
  padding-right: 8%;
  box-sizing: border-box;
}

.coop-banner-title {
  margin: 0;
  max-width: 12em;
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 0.12em;
  text-align: left;
  color: #fff;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
}

.coop-mode-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.coop-mode-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-top: 3px solid var(--blue-500);
  padding: 2rem 1.75rem;
  box-shadow: 0 8px 28px rgba(5, 21, 37, 0.08);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  will-change: transform;
}

.coop-mode-card:hover {
  transform: scale(1.045);
  box-shadow: 0 16px 40px rgba(5, 21, 37, 0.16);
}

.coop-mode-tag {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--blue-600);
}

.coop-mode-card h3 {
  margin: 0 0 0.85rem;
  font-size: 1.25rem;
  color: var(--blue-900);
}

.coop-mode-card > p:last-child {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.75;
}

.coop-process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.coop-process-card {
  text-align: center;
  padding: 1.75rem 1rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.coop-process-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--blue-600), var(--blue-800));
  color: var(--white);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.coop-process-line1,
.coop-process-line2 {
  margin: 0;
  color: var(--blue-900);
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.55;
}

.coop-process-line2 {
  color: var(--text-muted);
  font-weight: 400;
}

.coop-scenes {
  overflow: hidden;
  padding-bottom: 2.5rem;
}

body.coop-page .coop-modes,
body.coop-page .coop-process,
body.coop-page .coop-scenes {
  padding-top: 2.25rem;
  padding-bottom: 2.25rem;
}

/* 仅拉开顶部 banner 与三大合作模式的间距 */
body.coop-page .coop-modes {
  padding-top: 4.75rem;
}

body.coop-page .coop-scenes {
  padding-bottom: 2.5rem;
}

body.coop-page .coop-modes .section-head,
body.coop-page .coop-process .section-head,
body.coop-page .coop-scenes .section-head {
  margin-bottom: 1.25rem;
}

.coop-marquee {
  overflow: hidden;
  width: 100%;
  margin-top: 0.5rem;
  mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
}

.coop-marquee-track {
  display: flex;
  gap: 1.15rem;
  width: max-content;
  will-change: transform;
}

.coop-scene-card {
  flex: 0 0 200px;
  width: 200px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 6px 22px rgba(5, 21, 37, 0.07);
  pointer-events: none;
  user-select: none;
}

.coop-scene-img {
  aspect-ratio: 1 / 1;
  background-color: #0a2540;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.coop-scene-img-1 {
  background-image: url("../images/coop/scene-full.png");
}

.coop-scene-img-2 {
  background-image: url("../images/coop/scene-mine.png");
}

.coop-scene-img-3 {
  background-image: url("../images/coop/scene-params.png");
}

.coop-scene-img-4 {
  background-image: url("../images/coop/scene-custom.png");
}

.coop-scene-line {
  margin: 0;
  padding: 0 0.75rem;
  text-align: center;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text);
}

.coop-scene-line:first-of-type {
  margin-top: 0.7rem;
}

.coop-scene-line:last-child {
  margin-bottom: 0.75rem;
}

/* 合作模式页：三大合作模式 / 服务流程滚动渐入；定制服务场景不加动画 */
body.coop-page .coop-modes .coop-reveal,
body.coop-page .coop-process .coop-reveal {
  opacity: 0;
  transform: translate3d(0, 20px, 0);
  transition:
    opacity 0.45s ease,
    transform 0.45s ease;
  will-change: opacity, transform;
}

body.coop-page .coop-modes .coop-reveal.is-inview,
body.coop-page .coop-process .coop-reveal.is-inview {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  will-change: auto;
}

@media (prefers-reduced-motion: reduce) {
  body.coop-page .coop-modes .coop-reveal,
  body.coop-page .coop-process .coop-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media (max-width: 900px) {
  .coop-mode-grid {
    grid-template-columns: 1fr;
  }

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

  .coop-banner-content {
    padding-left: 10%;
    padding-right: 8%;
  }
}

@media (max-width: 600px) {
  .coop-banner {
    min-height: 85vh;
  }

  .coop-banner-title {
    max-width: none;
  }

  .coop-process-grid {
    grid-template-columns: 1fr;
  }

  .coop-scene-card {
    flex-basis: 170px;
    width: 170px;
  }
}

/* ========== 支重轮产品页 ========== */
.zcl-product-section {
  padding-top: 2.5rem;
}

.zcl-align-block {
  max-width: 52rem;
}

.zcl-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.85rem;
  margin: 0;
  align-items: stretch;
}

.zcl-overview {
  margin-top: 1.5rem;
  margin-bottom: 2.5rem;
}

.zcl-thumb {
  aspect-ratio: 1;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background-size: cover;
  background-position: center;
  transition: transform 0.3s ease;
  cursor: default;
}

.zcl-thumb:hover {
  transform: scale(1.06);
  z-index: 1;
}

.zcl-thumb-1 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.zcl-thumb-2 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-2.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.zcl-thumb-3 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-3.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.zcl-thumb-4 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-4.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.zcl-overview h2 {
  margin-top: 0;
}

.zcl-feature-heading {
  margin-bottom: 1.25rem;
}

.zcl-feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.15rem;
  margin-bottom: 2.5rem;
}

.zcl-feature-card {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.25rem;
  align-items: stretch;
  min-height: 140px;
  padding: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 18px rgba(5, 21, 37, 0.06);
}

.zcl-feature-img {
  width: 140px;
  min-height: 140px;
  height: 100%;
  background-size: cover;
  background-position: center;
}

.zcl-feature-img-1 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/craft-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.zcl-feature-img-2 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/craft-2.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.zcl-feature-img-3 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/craft-3.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.zcl-feature-img-4 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/craft-4.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.zcl-feature-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.15rem 1.25rem 1.15rem 0;
}

.zcl-feature-text h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  color: var(--blue-900);
}

.zcl-feature-text p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ========== 品牌故事单页 ========== */
.story-page {
  background: #0a0e14;
}

.story-hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr minmax(320px, 38%);
  padding-top: var(--header-h);
  overflow: hidden;
}

.story-hero-visual {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  background: #2a323c;
  overflow: hidden;
}

.story-carousel {
  position: absolute;
  inset: 0;
}

.story-carousel-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.story-carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.55s ease;
  pointer-events: none;
}

.story-carousel-slide.is-active {
  opacity: 1;
  pointer-events: auto;
}

.story-carousel-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, #3a424c 0%, #2a323c 50%, #1e252e 100%);
  color: rgba(255, 255, 255, 0.35);
  font-size: 1rem;
  letter-spacing: 0.2em;
}

.story-carousel-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}

.story-carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius);
  background: rgba(8, 12, 18, 0.45);
  color: #fff;
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.story-carousel-btn:hover {
  background: rgba(26, 115, 181, 0.55);
  border-color: var(--blue-400);
}

.story-carousel-prev {
  left: 1rem;
}

.story-carousel-next {
  right: 1rem;
}

.story-carousel-dots {
  position: absolute;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 0.5rem;
}

.story-carousel-dot {
  width: 9px;
  height: 9px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.story-carousel-dot.is-active {
  background: var(--blue-400);
  border-color: var(--blue-400);
}

.story-hero-panel {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - var(--header-h));
  max-height: calc(100vh - var(--header-h));
  overflow-y: auto;
  padding: 2.75rem 2.25rem 2.5rem;
  background: linear-gradient(180deg, rgba(10, 37, 64, 0.88) 0%, rgba(13, 58, 92, 0.82) 48%, rgba(20, 90, 138, 0.78) 100%);
  backdrop-filter: blur(18px) saturate(1.15);
  -webkit-backdrop-filter: blur(18px) saturate(1.15);
  border-left: 1px solid rgba(93, 173, 226, 0.18);
  box-shadow: -24px 0 60px rgba(5, 21, 37, 0.35);
  color: #fff;
}

.story-panel-title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.85rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: #f4f7fb;
  text-align: left;
  line-height: 1.25;
}

.story-panel-lead {
  margin: 0 0 2.25rem;
  font-size: 0.95rem;
  font-weight: 300;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
}

.story-axis {
  list-style: none;
  margin: 0;
  padding: 0 0 0 0.35rem;
  border-left: 1px solid rgba(93, 173, 226, 0.28);
}

.story-axis-item {
  position: relative;
  padding: 0 0 1.65rem 1.35rem;
}

.story-axis-item:last-child {
  padding-bottom: 0;
}

.story-axis-item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 0.45rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #9fd4f5;
  box-shadow: 0 0 0 3px rgba(159, 212, 245, 0.25);
}

.story-axis-year {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #9fd4f5;
  line-height: 1.2;
}

.story-axis-content h2 {
  margin: 0 0 0.45rem;
  font-size: 0.98rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: 0.04em;
  line-height: 1.45;
}

.story-axis-content p {
  margin: 0;
  font-size: 0.84rem;
  font-weight: 300;
  line-height: 1.95;
  color: rgba(255, 255, 255, 0.48);
}

.story-axis-content strong {
  color: #9fd4f5;
  font-weight: 700;
}

@media (max-width: 900px) {
  .story-hero {
    grid-template-columns: 1fr;
  }

  .story-hero-visual {
    min-height: 42vh;
  }

  .story-hero-panel {
    min-height: auto;
    max-height: none;
  }

  .coop-banner-content {
    padding-left: 10%;
    padding-right: 8%;
  }
}

@media (max-width: 768px) {
  .zcl-thumbs {
    grid-template-columns: repeat(2, 1fr);
  }

  .zcl-feature-card {
    grid-template-columns: 110px 1fr;
    min-height: 110px;
  }

  .zcl-feature-img {
    width: 110px;
    min-height: 110px;
  }

  .coop-banner {
    min-height: 85vh;
  }

  .coop-banner-title {
    font-size: clamp(1.7rem, 7vw, 2.4rem);
    letter-spacing: 0.08em;
  }
}

/* ========== 支重轮主页：吨位选型 / 样板实拍 / 规格说明 ========== */
body.zcl-page {
  background: #e8edf2 !important;
  background-image: none !important;
}

body.zcl-page .sidebar-main {
  background: #e8edf2;
}

.tonnage-section {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}

.tonnage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.tonnage-card {
  background: #fff;
  border: 1px solid #d7dee6;
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(26, 45, 61, 0.06);
  padding: 1.4rem 1.35rem 1.5rem;
}

.tonnage-card h2,
.tonnage-card h3 {
  margin: 0 0 0.9rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--blue-800);
  letter-spacing: 0.02em;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid #e3e8ee;
}

.tonnage-card p {
  margin: 0 0 0.7rem;
  font-size: 0.92rem;
  line-height: 1.75;
  color: #4a5d6e;
}

.tonnage-card p:last-child {
  margin-bottom: 0;
}

.tonnage-card p span {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--blue-600);
}

.zcl-sample-section {
  padding-top: 1.5rem;
  padding-bottom: 2.5rem;
}

.zcl-sample-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
  max-width: 52rem;
  margin: 0 auto;
}

.zcl-sample-item {
  margin: 0;
  background: #fff;
  border: 1px solid #d7dee6;
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(26, 45, 61, 0.06);
  overflow: hidden;
}

.zcl-sample-img {
  aspect-ratio: 4 / 3;
  background-size: cover;
  background-position: center;
}

.zcl-sample-img-1 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/sample-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.zcl-sample-img-2 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/sample-2.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

/* 产品成品：1:1 图居中放入 4:3 框，object-fit:contain，不拉伸不裁切 */
body.zcl-page .zcl-sample-contain {
  background-image: none !important;
  background-color: #f5f7fa;
  display: flex;
  align-items: center;
  justify-content: center;
}

body.zcl-page .zcl-sample-contain img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
  display: block;
}

.zcl-sample-img-3 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/sample-3.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

.zcl-sample-caption {
  margin: 1rem auto 0;
  max-width: 52rem;
  text-align: center;
  font-size: 0.88rem;
  color: #5a7085;
  line-height: 1.7;
}

.zcl-spec-section {
  padding-top: 1.5rem;
  padding-bottom: 3.5rem;
}

.zcl-spec-card {
  background: #fff;
  border: 1px solid #d7dee6;
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(26, 45, 61, 0.06);
  padding: 1.6rem 1.75rem;
}

.zcl-spec-card p {
  margin: 0 0 1rem;
  color: #4a5d6e;
  line-height: 1.85;
  font-size: 0.98rem;
}

.zcl-spec-card p:last-child {
  margin-bottom: 0;
}

.zcl-spec-card a {
  color: var(--blue-600);
  font-weight: 500;
}

.zcl-spec-cta {
  margin: 1.5rem 0 0;
}

@media (max-width: 640px) {
  .tonnage-grid,
  .zcl-sample-grid {
    grid-template-columns: 1fr;
  }
}

/* 导向轮页：沿用支重轮版式，图片资源路径区分 */
body.dxl-page .zcl-thumb-1 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.dxl-page .zcl-thumb-2 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-2.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.dxl-page .zcl-thumb-3 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-3.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.dxl-page .zcl-thumb-4 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-4.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.dxl-page .zcl-feature-img-1 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/craft-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.dxl-page .zcl-feature-img-2 {
  background-color: #f5f7fa;
  background-image: url("../images/daoxianglun/craft-2.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.dxl-page .zcl-feature-img-3 {
  background-color: #f5f7fa;
  background-image: url("../images/daoxianglun/craft-3.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.dxl-page .zcl-feature-img-4 {
  background-color: #f5f7fa;
  background-image: url("../images/daoxianglun/craft-4.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.dxl-page .zcl-sample-img-1,
body.dxl-page .zcl-sample-img-2,
body.dxl-page .zcl-sample-img-3 {
  background-image: none;
  background-color: #f5f7fa;
}

/* 托轮页：沿用支重轮版式，图片资源路径区分 */
body.tl-page .zcl-thumb-1 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.tl-page .zcl-thumb-2 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-2.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.tl-page .zcl-thumb-3 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-3.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.tl-page .zcl-thumb-4 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-4.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.tl-page .zcl-feature-img-1 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/craft-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.tl-page .zcl-feature-img-2 {
  background-color: #f5f7fa;
  background-image: url("../images/tuolun/craft-2.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.tl-page .zcl-feature-img-3 {
  background-color: #f5f7fa;
  background-image: url("../images/tuolun/craft-3.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.tl-page .zcl-feature-img-4 {
  background-color: #f5f7fa;
  background-image: url("../images/tuolun/craft-4.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.tl-page .zcl-sample-grid-2 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 40rem;
}

body.tl-page .zcl-sample-img-1,
body.tl-page .zcl-sample-img-2 {
  background-image: none;
  background-color: #f5f7fa;
}

body.tl-page .zcl-sample-img-3 {
  display: none;
}

/* 驱动轮页：沿用支重轮版式，图片资源路径区分 */
body.qdl-page .zcl-thumb-1 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.qdl-page .zcl-thumb-2 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-2.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.qdl-page .zcl-thumb-3 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-3.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.qdl-page .zcl-thumb-4 {
  background-color: #0a2540;
  background-image: url("../images/product-thumbs/thumb-4.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.qdl-page .zcl-feature-img-1 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/craft-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.qdl-page .zcl-feature-img-2 {
  background-image:
    linear-gradient(160deg, rgba(5, 21, 37, 0.25), rgba(13, 58, 92, 0.45)),
    url("images/qudonglun/craft-2.jpg"),
    linear-gradient(160deg, #051525, #145a8a);
}

body.qdl-page .zcl-feature-img-3 {
  background-image:
    linear-gradient(160deg, rgba(5, 21, 37, 0.22), rgba(45, 143, 212, 0.35)),
    url("images/qudonglun/craft-3.jpg"),
    linear-gradient(200deg, #0a2540, #2d8fd4);
}

body.qdl-page .zcl-feature-img-4 {
  background-color: #f5f7fa;
  background-image: url("../images/qudonglun/craft-4.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.qdl-page .zcl-sample-img-1,
body.qdl-page .zcl-sample-img-2,
body.qdl-page .zcl-sample-img-3 {
  background-image: none;
  background-color: #f5f7fa;
}

/* 张紧装置页：沿用支重轮版式，图片资源路径区分 */
body.zj-page .zcl-thumb-1 {
  background-color: #0a2540;
  background-image: url("../images/zhangjin/thumb-1.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.zj-page .zcl-thumb-2 {
  background-color: #0a2540;
  background-image: url("../images/zhangjin/thumb-2.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.zj-page .zcl-thumb-3 {
  background-color: #0a2540;
  background-image: url("../images/zhangjin/thumb-3.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.zj-page .zcl-thumb-4 {
  background-color: #0a2540;
  background-image: url("../images/zhangjin/thumb-4.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.zj-page .zcl-feature-img-1 {
  background-color: #0a2540;
  background-image: url("../images/zhichenglun/craft-1.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}

body.zj-page .zcl-feature-img-2 {
  background-color: #f5f7fa;
  background-image: url("../images/zhangjin/craft-2.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.zj-page .zcl-feature-img-3 {
  background-color: #f5f7fa;
  background-image: url("../images/zhangjin/craft-3.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.zj-page .zcl-feature-img-4 {
  background-color: #f5f7fa;
  background-image: url("../images/zhangjin/craft-4.png");
  background-size: contain;
  background-position: center center;
  background-repeat: no-repeat;
}

body.zj-page .zcl-sample-grid-2 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 40rem;
}

body.zj-page .zcl-sample-img-1,
body.zj-page .zcl-sample-img-2 {
  background-image: none;
  background-color: #f5f7fa;
}

body.zj-page .zcl-sample-img-3 {
  display: none;
}

/* ========== 工业商务质感美化（品牌故事页 .story-page 完全排除） ========== */
body:not(.story-page) {
  background-color: #f8f9fa;
  background-image: linear-gradient(180deg, #f8f9fa 0%, #f3f5f7 50%, #f8f9fa 100%);
  background-attachment: scroll;
}

body:not(.story-page) main,
body:not(.story-page) .sidebar-main {
  background: transparent;
}

body:not(.story-page) .section {
  position: relative;
}

body:not(.story-page) .section + .section::before,
body:not(.story-page) .section-home-intro + .section::before,
body:not(.story-page) .page-hero + .section::before,
body:not(.story-page) .hero + .section::before {
  content: "";
  display: block;
  height: 1px;
  margin: 0 auto 0;
  max-width: var(--container);
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(45, 143, 212, 0.16) 20%,
    rgba(45, 143, 212, 0.22) 50%,
    rgba(45, 143, 212, 0.16) 80%,
    transparent 100%
  );
}

body:not(.story-page) .section-alt {
  background: linear-gradient(180deg, rgba(238, 244, 249, 0.92) 0%, rgba(244, 248, 251, 0.88) 100%);
}

body:not(.story-page) .product-card,
body:not(.story-page) .coop-mode-card,
body:not(.story-page) .coop-process-card,
body:not(.story-page) .tech-article-card,
body:not(.story-page) .zcl-feature-card,
body:not(.story-page) .contact-info-simple,
body:not(.story-page) .contact-map-wrap,
body:not(.story-page) .home-video-wrap,
body:not(.story-page) .home-intro-text {
  border-radius: 6px;
  box-shadow: 0 6px 22px rgba(5, 21, 37, 0.07);
}

body:not(.story-page) .product-card,
body:not(.story-page) .coop-mode-card,
body:not(.story-page) .coop-process-card,
body:not(.story-page) .tech-article-card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(45, 143, 212, 0.14);
}

body:not(.story-page) .product-card:hover,
body:not(.story-page) .tech-article-card:hover {
  box-shadow: 0 10px 28px rgba(5, 21, 37, 0.11);
  border-color: rgba(45, 143, 212, 0.28);
}

body:not(.story-page) .contact-info-simple,
body:not(.story-page) .contact-map-wrap {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(45, 143, 212, 0.14);
  padding: 1.5rem 1.6rem;
}

body:not(.story-page) .home-intro-text {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(45, 143, 212, 0.12);
  padding: 1.5rem 1.6rem;
}

body:not(.story-page) .zcl-feature-card {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 6px 22px rgba(5, 21, 37, 0.07);
}

body:not(.story-page) .section-head h2::before,
body:not(.story-page) .tech-list-heading::before,
body:not(.story-page) .content-block > h2::before,
body:not(.story-page) .zcl-feature-heading::before,
body:not(.story-page) .zcl-overview h2::before,
body:not(.story-page) .contact-info-simple > h2::before,
body:not(.story-page) .home-intro-text > h2::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 0.85em;
  margin-right: 0.55rem;
  background: linear-gradient(180deg, var(--blue-500), var(--blue-700));
  border-radius: 1px;
  vertical-align: -0.06em;
}

body:not(.story-page) .page-hero {
  background: linear-gradient(180deg, var(--blue-950) 0%, var(--blue-800) 100%);
}

/* ========== 首页五板块：独立深蓝工业氛围 + 滚动显现（仅 .home-page） ========== */
body.home-page .home-atmosphere {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 5.25rem 0;
  background-color: #e9f0f6;
}

body.home-page main > section.section.home-atmosphere::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 1;
  display: block;
  height: auto;
  max-width: none;
  margin: 0;
  background: none;
}

body.home-page .home-atmosphere::after {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  top: 0;
  height: 1px;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(13, 58, 92, 0.08) 20%,
    rgba(26, 115, 181, 0.22) 50%,
    rgba(13, 58, 92, 0.08) 80%,
    transparent 100%
  );
}

body.home-page #products.home-atmosphere::after {
  display: none;
}

body.home-page .home-atmosphere > .container {
  position: relative;
  z-index: 2;
}

/* 五板块共用：淡淡工厂实拍衬托 + 半透明深蓝蒙版（局部区块，不抢卡片） */
body.home-page section.home-atm-products,
body.home-page section.home-atm-brand,
body.home-page section.home-atm-tech,
body.home-page section.home-atm-coop,
body.home-page section.home-atm-contact {
  background-color: #dce8f2;
}

/* 产品入口：新图1 */
body.home-page main > section.section.home-atmosphere.home-atm-products::before {
  opacity: 1;
  background-image:
    linear-gradient(
      165deg,
      rgba(5, 21, 37, 0.72) 0%,
      rgba(10, 37, 64, 0.66) 42%,
      rgba(13, 58, 92, 0.6) 100%
    ),
    linear-gradient(180deg, rgba(236, 242, 248, 0.5) 0%, rgba(236, 242, 248, 0.36) 100%),
    url("../images/home/hero-1.png");
  background-size: auto, auto, cover;
  background-position: center center;
  background-repeat: no-repeat;
}

/* 品牌故事：新图2 */
body.home-page main > section.section.home-atmosphere.home-atm-brand::before {
  opacity: 1;
  background-image:
    linear-gradient(
      195deg,
      rgba(5, 21, 37, 0.74) 0%,
      rgba(8, 32, 56, 0.68) 45%,
      rgba(20, 90, 138, 0.55) 100%
    ),
    linear-gradient(180deg, rgba(236, 242, 248, 0.48) 0%, rgba(236, 242, 248, 0.34) 100%),
    url("../images/home/hero-2.png");
  background-size: auto, auto, cover;
  background-position: center 40%;
  background-repeat: no-repeat;
}

/* 技术干货：新图3 */
body.home-page main > section.section.home-atmosphere.home-atm-tech::before {
  opacity: 1;
  background-image:
    linear-gradient(
      180deg,
      rgba(5, 21, 37, 0.73) 0%,
      rgba(10, 37, 64, 0.66) 50%,
      rgba(13, 58, 92, 0.58) 100%
    ),
    linear-gradient(180deg, rgba(236, 242, 248, 0.5) 0%, rgba(236, 242, 248, 0.35) 100%),
    url("../images/home/hero-3.png");
  background-size: auto, auto, cover;
  background-position: center center;
  background-repeat: no-repeat;
}

/* 合作模式：循环新图1 */
body.home-page main > section.section.home-atmosphere.home-atm-coop::before {
  opacity: 1;
  background-image:
    linear-gradient(
      210deg,
      rgba(5, 21, 37, 0.73) 0%,
      rgba(10, 37, 64, 0.67) 48%,
      rgba(13, 58, 92, 0.58) 100%
    ),
    linear-gradient(180deg, rgba(236, 242, 248, 0.48) 0%, rgba(236, 242, 248, 0.34) 100%),
    url("../images/home/hero-1.png");
  background-size: auto, auto, cover;
  background-position: center 45%;
  background-repeat: no-repeat;
}

/* 联系我们：循环新图2 */
body.home-page main > section.section.home-atmosphere.home-atm-contact::before {
  opacity: 1;
  background-image:
    linear-gradient(
      175deg,
      rgba(5, 21, 37, 0.74) 0%,
      rgba(10, 37, 64, 0.67) 48%,
      rgba(13, 58, 92, 0.6) 100%
    ),
    linear-gradient(180deg, rgba(236, 242, 248, 0.5) 0%, rgba(236, 242, 248, 0.36) 100%),
    url("../images/home/hero-2.png");
  background-size: auto, auto, cover;
  background-position: center center;
  background-repeat: no-repeat;
}

/* 板块间柔和过渡，避免连成一整块 */
body.home-page .home-atmosphere + .home-atmosphere {
  box-shadow: inset 0 28px 40px -36px rgba(5, 21, 37, 0.12);
}

/* 五板块实拍背景：标题区提亮，卡片保持浅色突出 */
body.home-page section.home-atm-products .section-head h2,
body.home-page section.home-atm-brand .section-head h2,
body.home-page section.home-atm-tech .section-head h2,
body.home-page section.home-atm-coop .section-head h2,
body.home-page section.home-atm-contact .section-head h2 {
  color: #f4f8fc;
}

body.home-page section.home-atm-products .section-head p,
body.home-page section.home-atm-brand .section-head p,
body.home-page section.home-atm-tech .section-head p,
body.home-page section.home-atm-coop .section-head p,
body.home-page section.home-atm-contact .section-head p {
  color: rgba(232, 240, 248, 0.88);
}

body.home-page section.home-atm-products .section-label,
body.home-page section.home-atm-brand .section-label,
body.home-page section.home-atm-tech .section-label,
body.home-page section.home-atm-coop .section-label,
body.home-page section.home-atm-contact .section-label {
  color: #7ec8f0;
}

body.home-page section.home-atm-brand .link-arrow,
body.home-page section.home-atm-coop .link-arrow {
  color: #9fd4f5;
}

body.home-page section.home-atm-products .section-head h2::before,
body.home-page section.home-atm-brand .section-head h2::before,
body.home-page section.home-atm-tech .section-head h2::before,
body.home-page section.home-atm-coop .section-head h2::before,
body.home-page section.home-atm-contact .section-head h2::before {
  background: linear-gradient(180deg, #5dade2, #2d8fd4);
}

body.home-page .home-atmosphere .product-card {
  background: rgba(255, 255, 255, 0.97);
  border: 1px solid rgba(26, 115, 181, 0.14);
  box-shadow:
    0 4px 16px rgba(5, 21, 37, 0.06),
    0 1px 0 rgba(255, 255, 255, 0.8) inset;
}

body.home-page .home-atmosphere .product-card:hover {
  box-shadow:
    0 10px 26px rgba(5, 21, 37, 0.1),
    0 1px 0 rgba(255, 255, 255, 0.85) inset;
  border-color: rgba(26, 115, 181, 0.28);
}

/* 五板块滚动入场：轻微缩放 + 淡入，仅播放一次（Banner/走进亚强不加） */
body.home-page .home-atmosphere .home-reveal {
  opacity: 0;
  transform: scale(0.97) translate3d(0, 16px, 0);
  transition:
    opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: opacity, transform;
}

body.home-page .home-atmosphere .home-reveal.is-inview {
  opacity: 1;
  transform: scale(1) translate3d(0, 0, 0);
  will-change: auto;
}

@media (prefers-reduced-motion: reduce) {
  body.home-page .home-atmosphere .home-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

body.home-page .section-home-intro + .home-atmosphere {
  box-shadow: inset 0 32px 48px -40px rgba(5, 21, 37, 0.14);
}

/* ========== 产品子页滚动入场（仅 body.zcl-page） ========== */
body.zcl-page.zcl-reveal-ready .zcl-reveal:not(.is-inview) {
  opacity: 0;
  transform: translate3d(0, 20px, 0);
}

body.zcl-page .zcl-reveal {
  transition:
    opacity 0.45s ease,
    transform 0.45s ease;
}

body.zcl-page .zcl-reveal.is-inview {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* 支重轮/导向轮/托轮/张紧：四条优势同步入场，无依次延迟；驱动轮不套用 */
body.zcl-page:not(.qdl-page) .zcl-feature-card.zcl-reveal {
  transition-delay: 0s;
}

body.zcl-page .tonnage-card.zcl-reveal:nth-child(1) { transition-delay: 0s; }
body.zcl-page .tonnage-card.zcl-reveal:nth-child(2) { transition-delay: 0.12s; }
body.zcl-page .tonnage-card.zcl-reveal:nth-child(3) { transition-delay: 0.24s; }
body.zcl-page .tonnage-card.zcl-reveal:nth-child(4) { transition-delay: 0.36s; }
body.zcl-page .tonnage-card.zcl-reveal:nth-child(5) { transition-delay: 0.48s; }
body.zcl-page .tonnage-card.zcl-reveal:nth-child(6) { transition-delay: 0.6s; }
body.zcl-page .tonnage-card.zcl-reveal:nth-child(7) { transition-delay: 0.72s; }

@media (prefers-reduced-motion: reduce) {
  body.zcl-page .zcl-reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}