:root {
  --bg: #F7FAFA;
  --bg-secondary: #EEF2F2;
  --bg-cloud: #EEF2F2;
  --bg-cloud2: #EEF2F2;
  --bg-card: #FFFFFF;
  --text: #384448;
  --text2: #384448;
  --text3: #708086;
  --brand-primary: #2B6777;
  --brand-light: #2B6777;
  --brand-dark: #1F4E5C;
  --brand-accent: #E6701A;
  --brand-eco: #2B6777;
  --brand-bright: #E6701A;
  --brand-cloud: #EEF2F2;
  --brand-pale: #EEF2F2;
  --cta: #E6701A;
  --cta-dark: #C85A0E;
  --brand-glow: rgba(43, 103, 119, 0.12);
  --accent: #2B6777;
  --accent-dark: #1F4E5C;
  --border: #D3DEE1;
  --border-brand: rgba(43, 103, 119, 0.22);
  --shadow: 0 4px 24px rgba(24, 36, 56, 0.06);
  --shadow-lg: 0 16px 48px rgba(24, 36, 56, 0.10);
  --radius: 4px;
  --radius-sm: 4px;
  --container: 1200px;
  --header-h: 72px;
  --font-sans: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 15px;
  padding-top: var(--header-h);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--brand-primary);
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  color: var(--brand-dark);
}

::selection {
  background: var(--brand-primary);
  color: #fff;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 0 0 rgba(43, 103, 119, 0.3); }
  50% { box-shadow: 0 0 0 15px rgba(43, 103, 119, 0); }
}

@keyframes numberGrow {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .hero::after,
  .hero-bg::after,
  .cta-strip::before {
    animation: none;
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.8s ease forwards;
}

.animate-fadeIn {
  animation: fadeIn 1s ease forwards;
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

.section-hidden {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease;
}

.section-visible {
  opacity: 1;
  transform: translateY(0);
}

.site-header {
  position: fixed;
  top: 0;
  left: 24px;
  right: 24px;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  border-radius: 0;
  z-index: 1000;
  transition: top 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease, border-radius 0.3s ease;
}

.site-header .logo,
.site-header .site-nav a,
.site-header .nav-toggle {
  text-shadow: 0 1px 10px rgba(24, 36, 56, 0.45);
}

.site-header.scrolled .logo,
.site-header.scrolled .site-nav a,
.site-header.scrolled .nav-toggle {
  text-shadow: none;
}

.site-header.scrolled {
  top: 0;
  border-radius: 0 0 4px 4px;
  background: #2B6777;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 24px rgba(24, 36, 56, 0.18);
}

/* 内页首屏无深色 Banner：导航默认主色实底，避免白字悬浮浅底不可见 */
.site-header.header-solid {
  top: 0;
  border-radius: 0 0 4px 4px;
  background: #2B6777;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 24px rgba(24, 36, 56, 0.18);
}
.site-header.header-solid .logo,
.site-header.header-solid .site-nav a,
.site-header.header-solid .nav-toggle {
  text-shadow: none;
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  line-height: 1.2;
  color: #fff;
  flex-shrink: 0;
}

.logo-img {
  height: 60px;
  width: auto;
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

.logo-mark-img {
  height: 36px;
  width: auto;
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

.logo-mark {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  color: #fff;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo:hover {
  color: #fff;
}

.logo-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 2px;
  font-family: var(--font-sans);
  color: #fff;
}

.logo-tag {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  color: #fff;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: #fff;
  margin: 6px 0;
  transition: 0.3s;
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: 24px;
}

.site-nav a {
  display: block;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  letter-spacing: 1.5px;
  position: relative;
}

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

.site-nav a:hover,
.site-nav a.active {
  color: #E6701A;
}

.site-nav a:hover::after,
.site-nav a.active::after {
  width: 60%;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: var(--cta);
  color: #fff;
  border: 1px solid var(--cta);
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.3s ease;
}

.header-cta:hover {
  background: #C85A0E;
  color: #fff;
  border-color: #C85A0E;
}

/* 移动端底部常驻悬浮询价按钮(导航 CTA 删除后保障转化入口) */
.mobile-cta { display: none; }
@media (max-width: 768px) {
  .mobile-cta {
    display: block;
    position: fixed;
    bottom: 20px;
    left: 16px;
    right: 16px;
    z-index: 999;
    padding: 14px;
    background: var(--cta);
    color: #fff;
    text-align: center;
    border-radius: 4px;
    font-weight: 600;
    font-size: 15px;
    box-shadow: 0 6px 20px rgba(24, 36, 56, 0.25);
    transition: background 0.3s ease, color 0.3s ease;
  }
  .mobile-cta:hover { background: #C85A0E; color: #fff; }
  body { padding-bottom: 80px; }
}

.hero {
  position: relative;
  height: 100vh;
  /* 抵消 body padding-top，让 Hero 视频顶到 top:0，
     透明导航悬浮在视频画面上（仅首页 .hero 生效） */
  margin-top: calc(-1 * var(--header-h));
  display: flex;
  align-items: center;
  color: #fff;
  background: #182438;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: rgba(24, 36, 56, 0.42);
  z-index: 1;
}

.hero::after {
  display: none;
}

.hero-bg::after {
  display: none;
}

.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  background: #182438;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.hero-img.loaded {
  opacity: 1;
}

.card img,
.gallery-item img,
.showcase-card img,
.article-cover,
.intro-image img,
.feature-card img,
.product-card img,
.strength-img img,
.quote-image,
.hero-img {
  filter: saturate(0.78) contrast(1.06) brightness(0.97) hue-rotate(-6deg);
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding: 80px 80px 80px 10%;
  text-align: left;
  width: 100%;
  max-width: 1400px;
}

.hero-badge {
  display: inline-block;
  padding: 8px 26px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 30px;
  font-size: 12px;
  letter-spacing: 3px;
  margin-bottom: 32px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  text-transform: uppercase;
  backdrop-filter: blur(6px);
}

.hero h1 {
  font-size: clamp(42px, 8vw, 72px);
  font-weight: 800;
  line-height: 1.15;
  color: #FFFFFF;
  margin-bottom: 36px;
  letter-spacing: 1px;
  font-family: var(--font-sans);
}

.hero h1 span {
  color: #fff;
}

.hero-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.88);
  max-width: 680px;
  margin: 0;
  line-height: 1.9;
  letter-spacing: 0.3px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 0.3px;
  position: relative;
}

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

.btn-primary:hover {
  background: var(--cta-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(230, 112, 26, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--brand-primary);
  border: 1px solid var(--brand-primary);
}

.btn-outline:hover {
  background: #EEF2F2;
  color: var(--brand-primary);
  border-color: var(--brand-primary);
}

.hero .btn-outline,
.cta-strip .btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.72);
}

.hero .btn-outline:hover,
.cta-strip .btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.85);
}

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

.btn-green:hover {
  background: var(--cta-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(230, 112, 26, 0.35);
}

.page-hero {
  background: #2B6777;
  color: #fff;
  margin-top: calc(-1 * var(--header-h));
  padding: 144px 40px 80px;
  text-align: center;
  position: relative;
}

.page-hero::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background: var(--brand-bright);
}

.page-hero h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  font-family: var(--font-sans);
  letter-spacing: 1px;
}

.page-hero p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 40px 0;
  font-size: 13px;
  color: var(--text3);
}

.breadcrumb a {
  color: var(--text2);
}

.breadcrumb a:hover {
  color: var(--brand-primary);
}

.breadcrumb span {
  margin: 0 8px;
  color: var(--brand-primary);
}

.section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}

.section-gap {
  padding: 64px 0;
}

/* 首页数据模块紧接 Hero,上下内边距收紧 */
body.home main > .section-gap:first-of-type { padding: 24px 0 32px; }

.section-dark {
  background: var(--bg);
}

.section-gray,
.section-cloud {
  background: var(--bg-cloud);
}

.sec-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  text-align: center;
  font-family: var(--font-sans);
  letter-spacing: 0.5px;
  position: relative;
  color: var(--brand-primary);
}

.sec-title::after {
  display: none;
}

.sec-sub {
  color: var(--text3);
  font-size: 15px;
  text-align: center;
  margin-bottom: 50px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.9;
}

.sec-en {
  font-size: 13px;
  color: var(--text3);
  letter-spacing: 3px;
  text-transform: uppercase;
  text-align: center;
  margin-top: 8px;
  font-weight: 500;
}

.sec-title-left {
  text-align: left;
  display: flex;
  align-items: center;
  gap: 16px;
}

.sec-title-left .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--brand-primary);
  color: var(--brand-primary);
  font-size: 16px;
  font-weight: 600;
  flex-shrink: 0;
  font-family: var(--font-sans);
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px;
  margin: 20px 0;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.card:hover {
  border-color: var(--border-brand);
  box-shadow: 0 8px 30px rgba(43, 103, 119, 0.1);
}

.card-flat {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.grid4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* ===== 板块重构:数据 / 核心实力 / 技术(AquaMaof 错落开放式)===== */
.stats-flex {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 48px;
}
.stat-item {
  flex: none;
  min-width: 150px;
  text-align: center;
  padding: 6px 8px;
}
.stat-item + .stat-item {
  border-left: none;
}
.stat-item .stat-num {
  font-size: 62px;
  font-weight: 800;
  color: var(--brand-primary);
  line-height: 1.1;
  font-family: var(--font-sans);
  letter-spacing: 1px;
  margin-bottom: 10px;
}
/* 字间距微调：平衡 4 组数据视觉宽度 */
.stat-item:nth-child(1) .stat-num { letter-spacing: 2px; }
.stat-item:nth-child(4) .stat-num { letter-spacing: 5px; }
.stat-item .stat-num span {
  font-size: 32px;
  font-weight: 600;
  margin-left: 4px;
  opacity: 0.9;
}
.stat-item .stat-label {
  font-size: 11px;
  color: #708086;
  font-weight: 600;
  letter-spacing: 1.5px;
}
.stat-item .stat-desc {
  font-size: 10px;
  color: var(--text3);
  margin-top: 4px;
  letter-spacing: 0.5px;
}

.strength-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: stretch;
}
.strength-img {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  min-height: 440px;
}
.strength-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  transition: transform 0.6s ease;
}
.strength-img:hover img {
  transform: scale(1.04);
}
.strength-badge {
  position: absolute;
  left: 20px;
  bottom: 20px;
  right: 20px;
  background: rgba(24, 36, 56, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: #fff;
  padding: 16px 20px;
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.6;
  z-index: 2;
}
.strength-badge a {
  color: #E6701A;
  font-weight: 600;
}
.strength-side {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.side-item {
  padding: 28px 0;
  border-top: 1px solid var(--border);
}
.side-item:first-child {
  border-top: none;
  padding-top: 0;
}
.side-item:last-child {
  padding-bottom: 0;
}
.side-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  font-family: var(--font-sans);
}
.side-item p {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.8;
}
.side-item a {
  display: inline-block;
  margin-top: 12px;
  font-size: 13px;
  font-weight: 600;
  color: #E6701A;
  transition: color 0.3s ease;
}
.side-item a:hover { color: #C85A0E; }

.tech-open {
  display: flex;
  flex-direction: row;
  gap: 24px;
  align-items: stretch;
}
.tech-item {
  flex: 1;
  padding: 36px 28px;
  background: var(--bg-card);
  border: 1px solid rgba(211, 222, 225, 0.5);
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.tech-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(43, 103, 119, 0.12);
  border-color: var(--brand-primary);
}
.tech-icon {
  width: 44px;
  height: 44px;
  color: var(--brand-primary);
  margin-bottom: 20px;
}
.tech-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  font-family: var(--font-sans);
}
.tech-item p {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.8;
}

.stat-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--brand-bright);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.stat-card:hover {
  border-color: var(--border-brand);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(43, 103, 119, 0.12);
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-num {
  font-size: 48px;
  font-weight: 800;
  color: var(--brand-primary);
  line-height: 1.1;
  font-family: var(--font-sans);
  margin-bottom: 12px;
}

.stat-num.green { color: var(--brand-primary); }
.stat-num.red { color: #E6701A; }
.stat-num.amber { color: var(--cta); }

.stat-label {
  font-size: 14px;
  color: var(--text);
  margin-top: 8px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.stat-desc {
  font-size: 12px;
  color: var(--text3);
  margin-top: 6px;
  letter-spacing: 0.5px;
}

.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  letter-spacing: 0.5px;
}

.t-red { background: rgba(230, 112, 26, 0.08); color: #E6701A; }
.t-amber { background: rgba(230, 112, 26, 0.1); color: var(--cta-dark); }
.t-green { background: rgba(43, 103, 119, 0.08); color: var(--brand-primary); }
.t-blue { background: rgba(43, 103, 119, 0.1); color: var(--brand-eco); }

.hl-box {
  background: rgba(43, 103, 119, 0.04);
  border-left: 8px solid var(--brand-primary);
  padding: 56px 48px;
  border-radius: 0 4px 4px 0;
  margin: 20px 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text2);
}

.hl-box-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--brand-primary);
  letter-spacing: 2px;
  margin: 0 0 14px;
  font-family: var(--font-sans);
}

.hl-box strong {
  color: var(--brand-primary);
}

.green-box {
  background: rgba(43, 103, 119, 0.06);
  border-left: 4px solid var(--brand-eco);
  padding: 24px 28px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-size: 15px;
  color: var(--text2);
}

.warn-box {
  background: rgba(230, 112, 26, 0.07);
  border-left: 4px solid var(--cta);
  padding: 24px 28px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-size: 15px;
  color: var(--text2);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 16px 0;
}

th {
  background: var(--bg-cloud);
  font-weight: 600;
  text-align: left;
  padding: 16px 20px;
  border-bottom: 2px solid var(--border-brand);
  font-size: 13px;
  color: var(--brand-primary);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  color: var(--text2);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(43, 103, 119, 0.03);
}

.tl {
  position: relative;
  padding-left: 40px;
  margin: 20px 0;
}

.tl::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border);
}

.tl-item {
  position: relative;
  margin-bottom: 32px;
}

.tl-dot {
  position: absolute;
  left: -34px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--brand-primary);
  background: var(--bg);
}

.tl-item h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--brand-primary);
}

.tl-item p {
  font-size: 14px;
  color: var(--text2);
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.4s ease;
  position: relative;
}

.feature-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(43, 103, 119, 0.06);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.feature-card:hover {
  border-color: var(--border-brand);
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.feature-card:hover::after {
  opacity: 1;
}

.feature-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.feature-card:hover img {
  transform: scale(1.05);
}

.feature-card-body {
  padding: 28px;
  position: relative;
  z-index: 1;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  font-family: var(--font-sans);
  letter-spacing: 0.3px;
  color: var(--text);
}

.feature-card p {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.8;
}

.feature-card a {
  display: inline-block;
  margin-top: 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.faq-item {
  border: 1px solid #D3DEE1;
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  background: transparent;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: #D3DEE1;
}

.faq-q {
  width: 100%;
  text-align: left;
  padding: 36px 48px;
  background: none;
  border: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: inherit;
  transition: color 0.3s ease, background 0.3s ease;
}

.faq-q:hover {
  color: var(--brand-primary);
  background: rgba(43, 103, 119, 0.03);
}

.faq-q::after {
  content: "";
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--brand-primary);
  border-bottom: 1.5px solid var(--brand-primary);
  transform: rotate(45deg);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.open .faq-q::after {
  transform: rotate(-135deg);
}

.faq-item.open .faq-q {
  color: var(--brand-primary);
  background: rgba(43, 103, 119, 0.04);
}

.faq-a {
  display: none;
  padding: 0 48px 44px;
  font-size: 14px;
  color: var(--text2);
  line-height: 1.9;
}

.faq-item.open .faq-a {
  display: block;
}

.news-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

.news-item:last-child {
  border-bottom: none;
}

.news-item:hover {
  padding-left: 10px;
}

.news-thumb {
  width: 220px;
  height: 140px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  transition: transform 0.4s ease;
}

.news-item:hover .news-thumb {
  transform: scale(1.03);
}

.news-meta {
  font-size: 12px;
  color: var(--brand-primary);
  margin-bottom: 10px;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.news-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  font-family: var(--font-sans);
}

.news-item h3 a {
  color: var(--text);
}

.news-item h3 a:hover {
  color: var(--brand-primary);
}

.news-excerpt {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.8;
}

.article-header {
  margin-bottom: 32px;
}

.article-meta {
  font-size: 13px;
  color: var(--brand-primary);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.article-cover {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 36px;
  background: #e8eef0;
}

.article-body {
  font-size: 17px;
  color: var(--text2);
  line-height: 1.95;
  max-width: 760px;
}

.article-body h2 {
  font-size: 22px;
  color: var(--text);
  margin: 32px 0 16px;
  font-family: var(--font-sans);
  letter-spacing: 0.3px;
}

.article-body p {
  margin: 0 0 22px;
  text-align: justify;
  text-justify: inter-ideograph;
}

.article-body .news-figure {
  margin: 28px 0 32px;
  padding: 0;
}

.article-body .news-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  background: #e8eef0;
}

.article-body .news-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: #708086;
  text-align: center;
  line-height: 1.6;
}

.news-card-cover {
  image-rendering: auto;
}

.article-body .news-source {
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid rgba(43, 103, 119, 0.15);
  font-size: 13px;
  color: #708086;
  line-height: 1.6;
}

.article-body .news-source a {
  color: var(--brand-primary);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text2);
  letter-spacing: 0.3px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  background: var(--bg-card);
  color: var(--text);
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(43, 103, 119, 0.1);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-error {
  font-size: 12px;
  color: #E6701A;
  margin-top: 6px;
  display: none;
}

.form-group.invalid .form-error {
  display: block;
}

.form-group.invalid input,
.form-group.invalid textarea {
  border-color: #E6701A;
}

.form-success {
  display: none;
  padding: 20px 24px;
  background: rgba(43, 103, 119, 0.08);
  border: 1px solid rgba(43, 103, 119, 0.25);
  border-radius: var(--radius-sm);
  color: var(--brand-primary);
  font-size: 14px;
  margin-top: 20px;
}

.form-success.show {
  display: block;
}

.contact-info-item {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.contact-info-item:last-child {
  border-bottom: none;
}

.contact-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1px solid var(--border-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
  color: var(--brand-primary);
  transition: all 0.3s ease;
}

.contact-info-item:hover .contact-icon {
  background: var(--brand-primary);
  color: #fff;
}

.cta-strip {
  background: #2B6777;
  color: #fff;
  padding: 100px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-strip::before {
  display: none;
}

.cta-strip::after {
  display: none;
}

.cta-strip > * {
  position: relative;
  z-index: 1;
}

.cta-strip h2 {
  font-size: 32px;
  margin-bottom: 16px;
  font-family: var(--font-sans);
  letter-spacing: 0.5px;
  position: relative;
  z-index: 1;
}

.cta-strip p {
  font-size: 15px;
  opacity: 0.9;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.site-footer {
  background: #2B6777;
  color: rgba(255, 255, 255, 0.9);
  padding: 60px 40px 30px;
  margin-top: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2.5fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand .logo-name {
  color: #fff;
  font-size: 20px;
  margin-bottom: 12px;
  font-family: var(--font-sans);
  letter-spacing: 2px;
}

.footer-logo {
  height: 72px;
  width: auto;
  display: block;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 2;
  margin-bottom: 16px;
}

.footer-brand a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  transition: color 0.3s ease;
  font-weight: 500;
}

.footer-brand a:hover {
  color: #E6701A;
}

.footer-col h4 {
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  margin-bottom: 20px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-weight: 600;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  transition: color 0.3s ease;
}

.footer-col a:hover {
  color: #E6701A;
}

.footer-bottom a {
  color: inherit;
  text-decoration: none;
  opacity: 0.9;
}
.footer-bottom a:hover {
  opacity: 1;
  text-decoration: underline;
}
.footer-bottom {
  max-width: var(--container);
  margin: 40px auto 0;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.72);
  letter-spacing: 0.5px;
}

.back-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: #E6701A;
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 18px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s ease;
  z-index: 999;
  box-shadow: 0 4px 20px rgba(230, 112, 26, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-top.show {
  opacity: 1;
  visibility: visible;
}

.back-top:hover {
  background: #C85A0E;
  transform: translateY(-4px);
}

.product-card {
  text-align: center;
  padding: 20px 10px;
  background: transparent;
  border: 1px solid rgba(211, 222, 225, 0.5);
  border-radius: 4px;
  transition: all 0.3s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(43, 103, 119, 0.12);
}

.product-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  background: var(--bg-secondary);
  filter: saturate(0.68) contrast(1.05) brightness(0.95) hue-rotate(-10deg);
}

.product-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  font-family: var(--font-sans);
  letter-spacing: 0.3px;
  color: var(--text);
}

.product-card p {
  font-size: 14px;
  color: var(--text2);
}

.img-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 20px 0;
}

.img-grid img {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: all 0.4s ease;
}

.img-grid img:hover {
  border-color: var(--border-brand);
  transform: scale(1.02);
}

.img-grid.single {
  grid-template-columns: 1fr;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.content-img {
  width: 100%;
  border-radius: var(--radius-sm);
  margin: 20px 0;
  border: 1px solid var(--border);
}

.number-animate {
  display: inline-block;
  animation: numberGrow 0.8s ease forwards;
}

.section-number {
  font-family: var(--font-sans);
  font-size: 120px;
  font-weight: 700;
  color: rgba(43, 103, 119, 0.06);
  line-height: 1;
  position: absolute;
  top: -20px;
  right: 40px;
  z-index: 0;
}

@media (max-width: 1200px) {
  .grid4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .section-number {
    font-size: 80px;
  }
}

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

  .grid3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-nav a {
    padding: 10px 14px;
    font-size: 13px;
  }
}

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

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #1F4E5C;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    box-shadow: var(--shadow-lg);
  }

  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 8px;
  }

  .site-nav a {
    padding: 14px 20px;
    font-size: 14px;
  }
  /* 移动端导航恢复通栏,不悬浮(避免窄屏悬浮条挤压汉堡菜单) */
  .site-header,
  .site-header.scrolled,
  .site-header.header-solid {
    top: 0;
    left: 0;
    right: 0;
    border-radius: 0;
  }

  .header-cta {
    padding: 8px 14px;
    font-size: 12px;
  }

  .logo-tag {
    display: none;
  }

  .logo-img {
    height: 51px;
  }

  .logo-mark-img {
    height: 32px;
  }

  .logo-name {
    font-size: 16px;
  }

  .logo-tag {
    font-size: 8px;
    letter-spacing: 1px;
  }

  .grid2,
  .grid3 {
    grid-template-columns: 1fr;
  }

  .news-item {
    flex-direction: column;
  }

  .news-thumb {
    width: 100%;
    height: 200px;
  }

  .hero {
    height: 100vh;
  }

  .stats-flex {
    flex-wrap: wrap;
  }
  .stat-item {
    flex: 1 1 45%;
  }
  .stat-item + .stat-item {
    border-left: none;
    border-top: none;
  }
  .stat-item .stat-num {
    font-size: 42px;
  }
  .stat-item:first-child .stat-num {
    font-size: 49px;
  }
  .strength-layout {
    grid-template-columns: 1fr;
  }
  .strength-img {
    min-height: 280px;
  }
  .tech-open {
    flex-direction: column;
  }
  .tech-item {
    padding: 28px;
  }

  .hero-inner {
    padding: 80px 24px;
    max-width: 100%;
  }

  .hero h1 {
    font-size: clamp(32px, 6vw, 52px);
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .img-grid {
    grid-template-columns: 1fr;
  }

  .section-gap {
    padding: 60px 0;
  }

  .section-number {
    display: none;
  }
}

@media (max-width: 480px) {
  .grid4 {
    grid-template-columns: 1fr;
  }

  .btn {
    padding: 14px 28px;
    font-size: 12px;
  }

  .header-inner,
  .section,
  .breadcrumb {
    padding-left: 20px;
    padding-right: 20px;
  }
}

/* ===== 首页高端化升级（方案A）：首屏CTA / 编辑式板块头 / 深浅节奏 ===== */

/* 首屏：CTA 左对齐 + 滚动提示 */
.hero-actions {
  justify-content: flex-start;
  margin-top: 44px;
}

.hero-badge {
  margin-bottom: 28px;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
}

.hero-scroll:hover {
  color: #fff;
}

.hero-scroll::after {
  content: "";
  width: 1px;
  height: 48px;
  background: rgba(255, 255, 255, 0.45);
  animation: scrollLine 2.2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  45% { transform: scaleY(1); transform-origin: top; }
  55% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* 全宽色带系统：深色宣言带 + 浅灰节奏带 */
.band-dark,
.band-gray {
  padding: 88px 40px;
}

.band-inner {
  max-width: var(--container);
  margin: 0 auto;
}

.band-dark {
  background: #182438;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.band-gray {
  background: var(--bg-cloud);
}

/* 深色数据带：白字 + 橙色单位点睛 */
.band-dark .stat-item .stat-num {
  color: #FFFFFF;
}

.band-dark .stat-item .stat-num span {
  color: var(--brand-accent);
  opacity: 1;
}

.band-dark .stat-item .stat-label {
  color: rgba(255, 255, 255, 0.85);
}

.band-dark .stat-item .stat-desc {
  color: rgba(255, 255, 255, 0.45);
}

/* 编辑式板块头（首页专用，左对齐） */
.sec-head {
  margin-bottom: 48px;
}

.sec-head-en {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text3);
  font-weight: 500;
  margin-bottom: 16px;
}

.sec-head-en::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--brand-accent);
  flex-shrink: 0;
}

.sec-head-title {
  font-size: 38px;
  font-weight: 700;
  color: var(--brand-primary);
  letter-spacing: 0.5px;
  line-height: 1.25;
  margin-bottom: 14px;
  font-family: var(--font-sans);
}

.sec-head-sub {
  color: var(--text3);
  font-size: 15px;
  max-width: 640px;
  line-height: 1.9;
}

/* 产品卡片：白卡出血大图 + 左对齐文本 */
.product-card {
  text-align: left;
  padding: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.product-card img {
  height: 300px;
  border-radius: 0;
  margin-bottom: 0;
  transition: transform 0.6s ease;
}

.product-card:hover img {
  transform: scale(1.05);
}

.product-card-body {
  padding: 24px 28px 28px;
}

.product-card h3 {
  font-size: 19px;
  margin-bottom: 6px;
}

.product-card .product-en {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 10px;
}

.product-card .product-desc {
  font-size: 13px;
  color: var(--text2);
}

/* 技术卡片编号 */
.tech-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--brand-accent);
  margin-bottom: 18px;
  font-family: var(--font-sans);
}

@media (max-width: 768px) {
  .band-dark,
  .band-gray {
    padding: 64px 20px;
  }

  .sec-head {
    margin-bottom: 36px;
  }

  .sec-head-title {
    font-size: 28px;
  }

  .hero-actions {
    margin-top: 36px;
  }

  .hero-scroll {
    display: none;
  }

  .hero-badge {
    padding: 7px 18px;
    letter-spacing: 2px;
  }

  .product-card img {
    height: 220px;
  }
}
@media (max-width: 768px) {
  .band-dark .stats-flex {
    gap: 24px;
  }
}
/* ===== 内页 page-hero 编辑式升级（方案A推广） ===== */
.page-hero {
  text-align: left;
  padding: 160px 40px 88px;
}

.page-hero::before {
  display: none;
}

.page-hero h1,
.page-hero p {
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
}

.page-hero h1 {
  font-size: 40px;
  position: relative;
  padding-bottom: 22px;
  margin-bottom: 20px;
}

.page-hero h1::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  background: var(--brand-bright);
}

.page-hero p {
  max-width: var(--container);
}

/* 深色板块上的编辑式板块头 */
.sec-head-dark .sec-head-title {
  color: #FFFFFF;
}

.sec-head-dark .sec-head-sub {
  color: rgba(255, 255, 255, 0.6);
}

.sec-head-dark .sec-head-en {
  color: rgba(255, 255, 255, 0.55);
}

@media (max-width: 768px) {
  .page-hero {
    padding: 120px 20px 64px;
  }

  .page-hero h1 {
    font-size: 30px;
  }
}