/* 全站通用样式 */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #000000;
  background: #f9f9f9;
  overflow-x: hidden;
}

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

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

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: #f9f9f9;
  color: #000000;
}

.page::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: none;
  opacity: 0;
  z-index: -1;
}

.page-inner {
  width: 100%;
  margin: 0 auto;
  padding: 0 40px 40px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* 导航条 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.navbar-inner {
  width: 100%;
  margin: 0 auto;
  padding: 14px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
}

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: #020617;
  box-shadow: none;
}

.brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.brand-text-main {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #e5e7eb;
}

.brand-text-sub {
  font-size: 13px;
  color: #9ca3af;
}

.brand-english {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: #2D6A4F;
  margin-left: 8px;
  padding-left: 12px;
  border-left: 2px solid rgba(45, 106, 79, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
  color: #000000;
}

.nav-link {
  position: relative;
  padding: 6px 10px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: 0.18s ease;
}

.nav-link span.label {
  opacity: 0.9;
}

.nav-link span.dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: #000000;
  opacity: 0;
  transform: scale(0.6);
  transition: 0.18s ease;
}

.nav-link:hover {
  background: rgba(0, 0, 0, 0.05);
  color: #000000;
}

.nav-link.active {
  background: rgba(0, 0, 0, 0.1);
  color: #000000;
  box-shadow: none;
}

.nav-link.active span.dot {
  opacity: 1;
  transform: scale(1);
}

.nav-cta {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  font-size: 13px;
  color: #000000;
  background: #ffffff;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  cursor: pointer;
  transition: 0.18s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.nav-cta:hover {
  border-color: rgba(0, 0, 0, 0.3);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-1px);
}

.nav-cta span.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #000000;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
}

.nav-toggle {
  display: none;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  background: #ffffff;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: #000000;
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: inherit;
  background: #000000;
}

.nav-toggle span::before {
  top: -5px;
}

.nav-toggle span::after {
  top: 5px;
}

/* 大图 hero 区域 */
.hero-banner {
  position: relative;
  height: 85vh;
  min-height: 600px;
  background: url('assets/images/drone-imager.jpg') no-repeat center center;
  background-size: cover;
  border-radius: 0;
  margin: 0;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: none;
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.5) 0%,
    rgba(255, 255, 255, 0.1) 40%,
    rgba(255, 255, 255, 0.1) 60%,
    rgba(255, 255, 255, 0.5) 100%
  );
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 40px 20px;
}

.hero-english-title {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 800;
  font-family: 'Helvetica Neue', 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #000000;
  margin-bottom: 28px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  line-height: 1.2;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
  display: inline-block;
  text-shadow: 0 1px 3px rgba(255, 255, 255, 0.8);
  position: relative;
  z-index: 3;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.hero-banner-title {
  font-size: clamp(48px, 8vw, 72px);
  font-weight: 700;
  color: #000000;
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}

.hero-banner-subtitle {
  font-size: clamp(16px, 3vw, 20px);
  color: #333333;
  margin-bottom: 32px;
  line-height: 1.8;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-banner-actions {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
}

/* 业务网格布局 - 用于首页核心业务两列居中 */
.business-grid {
  display: flex;
  gap: 48px;
  margin-top: 48px;
  justify-content: center;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  padding: 0 40px;
}

.business-card {
  background: #ffffff;
  border-radius: 28px;
  padding: 44px 40px;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  flex: 1;
  max-width: 640px;
}

.business-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.business-card-content {
  padding: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.business-title {
  font-size: 26px;
  font-weight: 600;
  color: #000000;
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.business-desc {
  font-size: 16px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 24px;
  flex: 1;
}

.business-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.business-tag {
  font-size: 14px;
  color: #666666;
  background: #f5f5f5;
  padding: 8px 16px;
  border-radius: 16px;
  font-weight: 500;
}

/* 解决方案网格布局 - 用于 solutions.html 两列居中 */
.solutions-grid {
  display: flex;
  gap: 32px;
  justify-content: center;
  margin-top: 48px;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  padding: 0 40px;
}

.solutions-grid .product-card {
  width: calc(50% - 16px);
  max-width: 640px;
  max-height: 650px;
  overflow: hidden;
}

.solutions-grid .product-image {
  height: 320px;
}

.solutions-grid .product-title {
  font-size: 26px;
  margin: 28px 32px 18px;
}

.solutions-grid .product-desc {
  font-size: 15px;
  margin: 0 32px 20px;
  line-height: 1.65;
}

.solutions-grid .product-features {
  margin: 0 32px 28px;
  gap: 8px;
}

.solutions-grid .product-features .pill {
  padding: 7px 14px;
  font-size: 13px;
}

/* 核心能力卡片 - 用于 about.html 公司简介区域 */
.capabilities-grid {
  display: flex;
  gap: 20px;
  margin-top: 24px;
}

.capability-card {
  flex: 1;
  padding: 20px;
  background: #ffffff;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.capability-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.mission-vision-card {
  padding: 32px;
  border-radius: 16px;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.04);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.mission-vision-card .feature-title {
  font-size: 20px;
  font-weight: 600;
  color: #000000;
  margin-bottom: 16px;
}

.mission-vision-card p {
  line-height: 1.8;
}

.capability-icon {
  width: 40px;
  height: 40px;
  background: #2D6A4F;
  border-radius: 8px;
  margin-bottom: 12px;
}

.capability-title {
  font-size: 16px;
  font-weight: 600;
  color: #000000;
  margin-bottom: 8px;
}

.capability-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.5;
  margin: 0;
}

/* 关于我们页面简介区域新样式 */
.about-intro-content {
  margin-top: 40px;
}

.about-intro-text {
  max-width: 900px;
  margin: 0 auto 48px;
}

.intro-paragraph {
  font-size: 18px;
  line-height: 1.9;
  color: #111827;
  text-align: center;
  margin: 0;
  padding: 36px 40px;
  background: linear-gradient(135deg, #ffffff 0%, #fafafa 100%);
  border-left: 4px solid #111827;
  border-radius: 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  max-width: 900px;
  margin: 0 auto;
}

.company-name {
  font-weight: 700;
  color: #111827;
  position: relative;
  display: inline-block;
  padding: 0 4px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.stat-card {
  background: #ffffff;
  border-radius: 16px;
  padding: 0;
  text-align: center;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.stat-image {
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
  margin-bottom: 20px;
}

.stat-value {
  font-size: 20px;
  font-weight: 700;
  color: #0D47A1;
  margin: 0 24px 12px;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 16px;
  font-weight: 600;
  color: #000000;
  margin: 0 24px 8px;
}

.stat-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.5;
  margin: 0 24px 24px;
}

/* 产品网格 */
.product-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: center;
  margin-top: 48px;
  width: 100%;
}

.product-card {
  background: #ffffff;
  border-radius: 28px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  flex: 0 0 calc(50% - 16px);
  max-width: 640px;
  max-height: 650px;
}

.product-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
}

.product-image {
  height: 320px;
  background-color: #f5f7fa;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: 0;
}

.product-title {
  font-size: 26px;
  font-weight: 600;
  color: #000000;
  margin: 28px 32px 18px;
  letter-spacing: -0.01em;
}

.product-desc {
  font-size: 15px;
  color: #666666;
  margin: 0 32px 20px;
  line-height: 1.65;
  flex: 1;
}

.product-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 32px 28px;
}

.product-features .pill {
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  color: #666666;
  background: #f5f5f5;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

/* 案例卡片 */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.case-card {
  padding: 28px;
  border-radius: 24px;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
}

.case-title {
  font-size: 20px;
  font-weight: 600;
  color: #000000;
  margin-bottom: 12px;
}

.case-desc {
  font-size: 14px;
  color: #666666;
  margin-bottom: 16px;
  line-height: 1.7;
}

.case-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.case-features .pill {
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 13px;
  color: #666666;
  background: #f5f5f5;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

/* 联系信息 */
.contact-info {
  margin-top: 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-icon {
  font-size: 24px;
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-label {
  font-size: 14px;
  color: #666666;
  margin-bottom: 4px;
}

.contact-value {
  font-size: 16px;
  color: #000000;
  line-height: 1.4;
}

.contact-note {
  margin-top: 24px;
  font-size: 14px;
  color: #666666;
  line-height: 1.5;
}

/* 常见问题 */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.faq-item {
  padding: 24px;
  border-radius: 12px;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.faq-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.06);
}

.faq-question {
  font-size: 16px;
  font-weight: 600;
  color: #000000;
  margin-bottom: 12px;
}

.faq-answer {
  font-size: 14px;
  color: #666666;
  line-height: 1.5;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px 4px 4px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.6);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.95);
  margin-bottom: 16px;
}

.eyebrow-pill {
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  background: linear-gradient(120deg, #22c55e, #22d3ee);
  color: #020617;
  font-weight: 600;
}

.eyebrow-text {
  font-size: 12px;
  color: #e5e7eb;
}

.hero-title {
  font-size: clamp(32px, 5vw, 40px);
  line-height: 1.12;
  letter-spacing: 0.02em;
  margin-bottom: 18px;
}

.hero-title span.highlight {
  color: #38bdf8;
}

.hero-subtitle {
  font-size: 15px;
  line-height: 1.7;
  color: #9ca3af;
  max-width: 560px;
  margin-bottom: 24px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 22px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-badge {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  font-size: 11px;
  color: #d1d5db;
  background: rgba(15, 23, 42, 0.9);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.btn-primary {
  padding: 12px 24px;
  border-radius: 999px;
  border: none;
  background: #000000;
  color: #ffffff;
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: 0.18s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  background: #333333;
}

.btn-ghost {
  padding: 11px 20px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  font-size: 13px;
  color: #000000;
  background: transparent;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: 0.18s ease;
}

.btn-ghost:hover {
  background: rgba(0, 0, 0, 0.05);
  border-color: rgba(0, 0, 0, 0.3);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 11px;
  color: #9ca3af;
  margin-top: 16px;
}

.hero-stats span strong {
  color: #e5e7eb;
}

.hero-visual {
  position: relative;
  min-height: 260px;
}

.card-orbit {
  position: absolute;
  inset: 0;
  border-radius: 28px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.96), transparent),
    rgba(15, 23, 42, 0.97);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.9);
  overflow: hidden;
  padding: 18px 18px 18px 20px;
}

.card-orbit-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.card-orbit-title {
  font-size: 13px;
  color: #e5e7eb;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.card-orbit-title span.sub {
  font-size: 11px;
  color: #9ca3af;
}

.card-orbit-chip {
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 11px;
  background: rgba(15, 23, 42, 0.96);
  border: 1px solid rgba(148, 163, 184, 0.8);
  color: #cbd5f5;
}

.card-orbit-body {
  display: grid;
  grid-template-columns: 1.6fr 1.3fr;
  gap: 18px;
  align-items: center;
}

.waveform {
  position: relative;
  height: 110px;
  border-radius: 16px;
  background: radial-gradient(circle at 10% 0%, rgba(59, 130, 246, 0.35), transparent),
    radial-gradient(circle at 90% 100%, rgba(45, 212, 191, 0.45), transparent),
    rgba(15, 23, 42, 1);
  overflow: hidden;
  padding: 10px 10px 14px;
}

.waveform-grid {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: linear-gradient(
      rgba(51, 65, 85, 0.9) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      rgba(51, 65, 85, 0.9) 1px,
      transparent 1px
    );
  background-size: 20px 14px;
}

.waveform-bars {
  position: relative;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 100%;
}

.waveform-bar {
  flex: 1;
  border-radius: 999px;
  background: linear-gradient(180deg, #22c55e, #22d3ee);
  opacity: 0.8;
}

.waveform-bar.alt {
  background: linear-gradient(180deg, #60a5fa, #a855f7);
}

.waveform-footer {
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  color: #9ca3af;
}

.metric-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.metric-item {
  padding: 8px 10px;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(55, 65, 81, 0.9);
}

.metric-name {
  font-size: 11px;
  color: #cbd5f5;
}

.metric-desc {
  font-size: 10px;
  color: #9ca3af;
  margin-top: 4px;
}

.metric-value {
  margin-top: 6px;
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: #a7f3d0;
}

.metric-value span.dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: radial-gradient(circle, #22c55e, transparent);
  box-shadow: 0 0 12px rgba(45, 212, 191, 0.9);
}

.section {
  margin-top: 32px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.section-title {
  font-size: 18px;
  color: #e5e7eb;
}

.section-subtitle {
  font-size: 13px;
  color: #9ca3af;
}

.section-tag {
  font-size: 11px;
  color: #9ca3af;
}

.section-badge {
  display: inline-block;
  background: transparent;
  color: #666666;
  font-size: 16px;
  padding: 0;
  margin-left: 16px;
  vertical-align: middle;
  font-weight: 400;
  max-width: 600px;
  line-height: 1.6;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.feature-card {
  padding: 32px 28px;
  border-radius: 12px;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.04);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.04);
}

.feature-title {
  font-size: 20px;
  font-weight: 600;
  color: #000000;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: 16px;
  color: #666666;
  line-height: 1.8;
}

/* 合作方式步骤样式 */
.cooperation-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 32px;
}

.step-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #333333;
  flex-shrink: 0;
  font-weight: 600;
}

.step-content {
  flex: 1;
}

.step-title {
  font-size: 17px;
  font-weight: 600;
  color: #000000;
  margin-bottom: 10px;
}

.step-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin: 0;
}

/* 通用 section 布局 */
.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: stretch;
  margin-top: 24px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.kpi-card {
  padding: 16px;
  border-radius: 12px;
  background: #f9fafb;
  border: none;
  box-shadow: none;
  transition: transform 0.2s ease;
}

.kpi-card:hover {
  transform: translateY(-2px);
}

.kpi-label {
  font-size: 11px;
  color: #666666;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kpi-value {
  font-size: 16px;
  font-weight: 700;
  color: #000000;
  margin-bottom: 4px;
}

.kpi-extra {
  font-size: 10px;
  color: #666666;
}

.list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.list-item {
  display: flex;
  gap: 12px;
  font-size: 14px;
  color: #000000;
  line-height: 1.4;
}

.list-item span.dot {
  margin-top: 6px;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: #000000;
  flex-shrink: 0;
}

.list-item small {
  display: block;
  font-size: 12px;
  color: #666666;
  margin-top: 4px;
  line-height: 1.3;
}

/* 产品/解决方案卡片 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.card {
  padding: 14px 14px 16px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(51, 65, 85, 1);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.95);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.card-title {
  font-size: 14px;
  color: #e5e7eb;
}

.card-tag {
  font-size: 11px;
  color: #22c55e;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(22, 163, 74, 0.15);
}

.card-body {
  font-size: 12px;
  color: #9ca3af;
  line-height: 1.7;
  margin-bottom: 10px;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: #6b7280;
}

.pill {
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid rgba(55, 65, 81, 0.9);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
  gap: 28px;
  margin-top: 22px;
}

.contact-card {
  padding: 40px;
  border-radius: 24px;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
}

.contact-row {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 8px;
  font-size: 12px;
  color: #cbd5f5;
  padding: 6px 0;
  border-bottom: 1px dashed rgba(55, 65, 81, 0.9);
}

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

.contact-label {
  color: #9ca3af;
}

.contact-note {
  margin-top: 10px;
  font-size: 11px;
  color: #9ca3af;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field-label {
  font-size: 12px;
  color: #e5e7eb;
}

.field-label span {
  color: #f97316;
}

.field-input,
.field-textarea {
  background: rgba(15, 23, 42, 0.92);
  border-radius: 10px;
  border: 1px solid rgba(51, 65, 85, 1);
  padding: 8px 9px;
  font-size: 13px;
  color: #e5e7eb;
  outline: none;
  transition: 0.16s ease;
}

.field-input::placeholder,
.field-textarea::placeholder {
  color: #6b7280;
}

.field-input:focus,
.field-textarea:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.9);
}

.field-textarea {
  min-height: 96px;
  resize: vertical;
}

.form-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 4px;
  font-size: 11px;
  color: #6b7280;
}

.form-status {
  min-height: 16px;
}

.footer {
  padding: 18px 40px 24px;
  width: 100%;
  margin: 0 auto;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: 11px;
  color: #666666;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-links a {
  color: #666666;
}

.footer-links a:hover {
  color: #000000;
}

/* 响应式 */
@media (max-width: 900px) {
  .hero-banner {
    height: 60vh;
    min-height: 400px;
    border-radius: 0;
    margin: 0;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
  }

  .hero-english-title {
    font-size: clamp(24px, 7vw, 40px);
    margin-bottom: 24px;
    letter-spacing: 0.15em;
    padding: 10px 20px;
  }

  .hero-banner-title {
    font-size: clamp(36px, 6vw, 48px);
  }

  .hero-banner-subtitle {
    font-size: clamp(14px, 2vw, 16px);
    line-height: 1.7;
  }

  .product-grid {
    gap: 32px;
    padding: 0;
  }

  .product-card {
    flex: 0 0 calc(50% - 16px);
    max-width: none;
    max-height: none;
  }

  .product-image {
    height: 280px;
  }

  .product-title {
    font-size: 24px;
    margin: 26px 30px 16px;
  }

  .product-desc {
    font-size: 14px;
    margin: 0 30px 18px;
    line-height: 1.65;
  }

  .product-features {
    margin: 0 30px 24px;
    gap: 8px;
  }

  .product-features .pill {
    padding: 6px 12px;
    font-size: 12px;
  }

  .two-col {
    grid-template-columns: minmax(0, 1fr);
  }

  .kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .business-grid,
  .solutions-grid {
    flex-direction: column;
    align-items: center;
    gap: 24px;
    width: 100%;
    margin-left: 0;
    padding: 0 16px;
  }

  .business-card,
  .solutions-grid .product-card {
    width: 100%;
    max-width: none;
    padding: 28px 24px;
  }

  .business-card,
  .solutions-grid .product-card {
    width: 100%;
    max-width: none;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-badge {
    margin-left: 0;
    margin-top: 12px;
    font-size: 15px;
    max-width: none;
  }
}

@media (max-width: 720px) {
  .navbar-inner {
    padding-inline: 16px;
  }

  .brand-text-sub {
    display: none;
  }

  .brand-english {
    font-size: 18px;
    letter-spacing: 2px;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-mobile-open .nav-links {
  position: absolute;
  left: 0;
  right: 0;
  top: 52px;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  padding: 8px 18px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

  .nav-mobile-open .navbar-inner {
    padding-bottom: 10px;
  }

  .hero-banner {
    height: 50vh;
    min-height: 300px;
    border-radius: 0;
    margin: 0;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
  }

  .hero-english-title {
    font-size: clamp(20px, 6vw, 32px);
    margin-bottom: 16px;
    letter-spacing: 0.12em;
  }

  .hero-banner-title {
    font-size: clamp(28px, 5vw, 36px);
  }

  .hero-banner-actions {
    flex-direction: column;
    align-items: center;
  }

  .product-grid,
  .feature-grid,
  .card-grid,
  .kpi-grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding: 0 16px;
  }

  .product-card {
    flex: 0 0 100%;
    width: 100%;
  }

  .product-image,
  .business-card-image {
    height: 260px;
  }

  .product-title {
    font-size: 22px;
    margin: 24px 28px 16px;
  }

  .product-desc {
    font-size: 14px;
    margin: 0 28px 18px;
    line-height: 1.65;
  }

  .product-features {
    margin: 0 28px 24px;
    gap: 8px;
  }

  .product-features .pill {
    padding: 6px 12px;
    font-size: 12px;
  }

  .business-title {
    font-size: 22px;
  }

  .business-card-content {
    padding: 24px 24px 28px;
  }

  .intro-paragraph {
    font-size: 16px;
    padding: 24px 28px;
  }

  .about-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .case-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .cooperation-step {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .step-icon {
    margin-bottom: 12px;
  }
}

/* ------------------------------
   Light theme overrides (极简白色主题)
   说明：保留原有类名，通过覆盖实现快速换肤
------------------------------ */
:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: rgba(17, 24, 39, 0.12);
  --shadow: 0 12px 30px rgba(17, 24, 39, 0.08);
  --shadow-soft: 0 6px 16px rgba(17, 24, 39, 0.08);
  --primary: #111827;
  --primary-hover: #0b1220;
}

body {
  background: var(--bg);
  color: var(--text);
}

.page {
  background: var(--bg);
  color: var(--text);
}

.navbar {
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
}

.navbar-inner {
  width: 100%;
  padding: 14px 40px;
}

.page-inner {
  width: 100%;
  padding: 0 40px 72px;
}

.section {
  margin-top: 64px;
}

.brand-text-main {
  color: var(--text);
  text-transform: none;
  letter-spacing: -0.01em;
  font-weight: 650;
}

.brand-text-sub {
  color: var(--muted);
}

.brand-logo {
  background: var(--surface);
  border: 1px solid var(--border);
}

.nav-links {
  color: var(--text);
  gap: 14px;
  font-size: 13px;
}

.nav-link {
  color: var(--text);
}

.nav-link span.dot {
  background: var(--text);
}

.nav-link:hover {
  background: rgba(17, 24, 39, 0.06);
}

.nav-link.active {
  background: rgba(17, 24, 39, 0.1);
  color: var(--text);
}

.nav-cta {
  background: var(--primary);
  color: #ffffff;
  border: 1px solid var(--primary);
}

.nav-cta:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  box-shadow: none;
}

.eyebrow {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
  margin-bottom: 14px;
}

.eyebrow-pill {
  background: rgba(17, 24, 39, 0.08);
  color: var(--text);
}

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

.hero {
  grid-template-columns: 1fr;
  gap: 22px;
  padding: 88px 0 26px;
}

.hero-visual {
  display: none;
}

.hero-title {
  color: var(--text);
  letter-spacing: -0.02em;
  font-size: clamp(44px, 6vw, 72px);
  line-height: 1.06;
}

.hero-title span.highlight {
  color: var(--text);
  font-weight: 700;
}

.hero-subtitle {
  color: var(--muted);
  max-width: 720px;
  font-size: 16px;
}

.hero-badge {
  background: rgba(17, 24, 39, 0.04);
  border: 1px solid rgba(17, 24, 39, 0.08);
  color: var(--text);
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: var(--shadow);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: rgba(17, 24, 39, 0.04);
}

.section-title {
  color: var(--text);
}

.section-subtitle,
.section-tag {
  color: var(--muted);
}

.feature-card,
.card,
.kpi-card,
.contact-card,
.metric-item {
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}

.feature-desc,
.card-body,
.kpi-label,
.contact-label,
.contact-note,
.metric-desc {
  color: var(--muted);
}

.card-tag {
  color: var(--text);
  background: rgba(17, 24, 39, 0.06);
}

.pill {
  border: 1px solid rgba(17, 24, 39, 0.12);
}

.field-input,
.field-textarea {
  background: #ffffff;
  border: 1px solid rgba(17, 24, 39, 0.14);
  color: var(--text);
}

.field-input:focus,
.field-textarea:focus {
  border-color: rgba(17, 24, 39, 0.35);
  box-shadow: 0 0 0 4px rgba(17, 24, 39, 0.08);
}

.footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
}

.footer-links a {
  color: var(--muted);
}

.footer-links a:hover {
  color: var(--text);
}

/* 产品详情页 */
.product-detail {
  margin-top: 40px;
}

.product-detail-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}

/* 图片轮播 */
.product-gallery {
  position: sticky;
  top: 100px;
}

.gallery-main {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 24px;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  margin-bottom: 16px;
}

.gallery-image {
  width: 100%;
  height: 100%;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  background-color: #ffffff;
}

.gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.2s ease;
  color: var(--text);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.gallery-nav:hover {
  background: #ffffff;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  transform: translateY(-50%) scale(1.05);
}

.gallery-prev {
  left: 16px;
}

.gallery-next {
  right: 16px;
}

.gallery-thumbnails {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.thumbnail {
  aspect-ratio: 4 / 3;
  border-radius: 12px;
  background-size: cover;
  background-position: center;
  background-color: #ffffff;
  border: 2px solid transparent;
  cursor: pointer;
  transition: 0.2s ease;
  box-shadow: var(--shadow-soft);
}

.thumbnail:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.thumbnail.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.15);
}

/* 产品信息 */
.product-info {
  padding-top: 20px;
}

.product-detail-title {
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.product-detail-subtitle {
  font-size: 16px;
  color: var(--muted);
  margin-bottom: 24px;
}

.product-detail-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 32px;
}

.product-detail-desc p {
  margin: 0;
}

/* 核心特性 */
.product-specs {
  margin-bottom: 32px;
}

.specs-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}

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

.specs-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

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

.spec-content strong {
  display: block;
  font-size: 16px;
  color: var(--text);
  margin-bottom: 6px;
  font-weight: 600;
}

.spec-content p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
}

/* 操作按钮 */
.product-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-large {
  padding: 14px 28px;
  font-size: 15px;
}

/* 技术参数 */
.product-tech-specs {
  margin-top: 64px;
  padding: 40px;
  background: var(--surface);
  border-radius: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}

.tech-specs-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.tech-spec-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  background: rgba(17, 24, 39, 0.04);
  border-radius: 12px;
}

.tech-spec-label {
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
}

.tech-spec-value {
  font-size: 16px;
  color: var(--text);
  font-weight: 600;
}

/* 应用场景 */
.product-applications {
  margin-top: 64px;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.application-card {
  padding: 24px;
  background: var(--surface);
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  text-align: center;
  transition: 0.2s ease;
}

.application-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.application-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.application-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.application-card p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  margin: 0;
}

/* 产品卡片链接 */
.product-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
  height: 100%;
}

.product-card-link:hover {
  color: inherit;
}

/* 响应式 */
@media (max-width: 900px) {
  .product-detail-container {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .product-gallery {
    position: relative;
    top: 0;
  }

  .tech-specs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .application-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .tech-specs-grid {
    grid-template-columns: 1fr;
  }

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

  .product-actions {
    flex-direction: column;
  }

  .btn-large {
    width: 100%;
    justify-content: center;
  }
}

/* 产品详情页页脚美化 */
.site-footer {
  margin-top: 80px;
  background: linear-gradient(180deg, #f9f9f9 0%, #ffffff 100%);
  border-top: 1px solid var(--border);
}

.footer-inner {
  width: min(1320px, 100%);
  margin: 0 auto;
  padding: 48px 28px 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.footer-icon {
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-contact-item p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}

.footer-contact-item a {
  color: var(--muted);
  text-decoration: none;
  transition: 0.2s ease;
}

.footer-contact-item a:hover {
  color: var(--primary);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links li {
  margin: 0;
}

.footer-links a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: 0.2s ease;
  display: inline-block;
}

.footer-links a:hover {
  color: var(--primary);
  transform: translateX(4px);
}

.footer-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 0;
}

.footer-bottom-inner {
  width: min(1320px, 100%);
  margin: 0 auto;
  padding: 0 28px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  text-align: center;
}

/* 响应式 */
@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .site-footer {
    margin-top: 60px;
  }

  .footer-inner {
    padding: 36px 20px 24px;
  }

  .footer-bottom {
    padding: 20px 0;
  }
}

/* 产品详情页导航栏美化 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

.header-inner {
  width: min(1320px, 100%);
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-logo {
  flex-shrink: 0;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.02em;
  transition: 0.2s ease;
}

.site-logo:hover {
  color: var(--primary);
}

.logo-text {
  font-weight: 700;
  background: linear-gradient(135deg, var(--text) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-grow: 1;
  justify-content: flex-end;
}

.site-nav a {
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  transition: all 0.2s ease;
  position: relative;
  background: transparent;
}

.site-nav a::before {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.2s ease;
}

.site-nav a:hover {
  color: var(--text);
  background: rgba(17, 24, 39, 0.04);
}

.site-nav a:hover::before {
  width: 60%;
}

.site-nav a.active {
  color: var(--text);
  background: rgba(17, 24, 39, 0.06);
  font-weight: 600;
}

.site-nav a.active::before {
  width: 80%;
  bottom: 6px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--border);
  cursor: pointer;
  padding: 10px;
  transition: 0.2s ease;
}

.nav-toggle:hover {
  background: rgba(17, 24, 39, 0.05);
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  position: relative;
  transition: 0.2s ease;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.2s ease;
}

.nav-toggle span::before {
  top: -8px;
}

.nav-toggle span::after {
  top: 8px;
}

/* 响应式 */
@media (max-width: 900px) {
  .site-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 4px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
  }

  .site-nav.active {
    transform: translateX(0);
  }

  .site-nav a {
    width: 100%;
    padding: 16px 20px;
    border-radius: 12px;
    font-size: 16px;
    justify-content: flex-start;
  }

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

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .header-inner {
    padding: 12px 20px;
  }

  .logo-text {
    font-size: 17px;
  }
}

@media (max-width: 600px) {
  .site-nav {
    top: 60px;
  }

  .header-inner {
    padding: 10px 16px;
  }

  .nav-toggle {
    width: 36px;
    height: 36px;
  }
}

/* 移动端优化 - 确保手机端正常显示 */
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }
  
  body {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
  }
  
  .page-inner {
    padding: 0 16px 32px;
    width: 100%;
  }
  
  .navbar-inner {
    padding: 12px 16px;
    width: 100%;
  }
  
  .brand-logo {
    width: 42px;
    height: 42px;
    border-radius: 21px;
  }
  
  .brand-text-main {
    font-size: 18px;
  }
  
  .section {
    margin-top: 40px;
  }
  
  .section-title {
    font-size: 24px;
    word-break: keep-all;
    white-space: nowrap;
  }
  
  .section-subtitle {
    font-size: 14px;
  }
  
  .business-grid {
    flex-direction: column;
    gap: 16px;
  }
  
  .business-card {
    width: 100%;
    max-width: none;
    padding: 24px 20px;
  }
  
  .business-icon {
    font-size: 28px;
  }
  
  .business-title {
    font-size: 18px;
  }
  
  .business-desc {
    font-size: 13px;
  }
  
  .business-tag {
    font-size: 11px;
    padding: 4px 10px;
  }
  
  .solutions-grid {
    flex-direction: column;
    gap: 16px;
  }
  
  .solutions-grid .product-card {
    width: 100%;
    max-width: none;
  }
  
  .capabilities-grid {
    flex-direction: column;
    gap: 16px;
  }
  
  .capability-card {
    width: 100%;
  }
  
  .about-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .stat-card {
    padding: 0;
  }
  
  .stat-image {
    height: 140px;
  }
  
  .stat-value {
    font-size: 18px;
    margin: 0 20px 10px;
  }
  
  .stat-label {
    font-size: 15px;
    margin: 0 20px 6px;
  }
  
  .stat-desc {
    font-size: 13px;
    margin: 0 20px 20px;
  }
  
  .product-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .product-image {
    height: 180px;
  }
  
  .product-title {
    font-size: 17px;
    margin: 16px;
  }
  
  .product-desc {
    font-size: 14px;
    margin: 0 16px 16px;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .feature-card {
    padding: 20px;
  }
  
  .feature-title {
    font-size: 18px;
  }
  
  .feature-desc {
    font-size: 14px;
  }
  
  .hero-banner {
    height: 45vh;
    min-height: 280px;
    margin: 16px 0;
    border-radius: 12px;
  }
  
  .hero-banner-actions {
    gap: 12px;
  }
  
  .btn-primary,
  .btn-ghost {
    padding: 10px 20px;
    font-size: 14px;
  }
  
  .two-col {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .kpi-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .kpi-card {
    padding: 16px;
  }
  
  .kpi-label {
    font-size: 12px;
  }
  
  .kpi-value {
    font-size: 24px;
  }
  
  .kpi-extra {
    font-size: 12px;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 12px;
  }
  
  .footer-links a {
    font-size: 13px;
  }
}

/* 小屏幕手机优化 */
@media (max-width: 480px) {
  html {
    font-size: 15px;
  }
  
  .brand-logo {
    width: 38px;
    height: 38px;
    border-radius: 19px;
  }
  
  .brand-text-main {
    font-size: 16px;
  }
  
  .hero-banner {
    height: 40vh;
    min-height: 240px;
  }
  
  .product-image {
    height: 160px;
  }
  
  .btn-primary,
  .btn-ghost {
    padding: 8px 16px;
    font-size: 13px;
  }
}

/* 平板优化 */
@media (min-width: 769px) and (max-width: 1024px) {
  .page-inner {
    padding: 0 24px 48px;
  }
  
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-banner {
    height: 55vh;
    min-height: 380px;
  }
  
  .business-grid,
  .solutions-grid {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .business-grid .feature-card,
  .solutions-grid .product-card {
    width: calc(50% - 12px);
    max-width: none;
  }
  
  .capabilities-grid {
    flex-wrap: wrap;
  }
  
  .capability-card {
    flex: 1 1 calc(33.333% - 14px);
    min-width: calc(33.333% - 14px);
  }
  
  .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  
  .stat-card {
    padding: 0;
  }
  
  .stat-image {
    height: 160px;
  }
  
  .stat-value {
    font-size: 19px;
    margin: 0 22px 11px;
  }
  
  .stat-label {
    font-size: 15px;
    margin: 0 22px 7px;
  }
  
  .stat-desc {
    font-size: 13px;
    margin: 0 22px 22px;
  }
}

/* 桌面端优化 */
@media (min-width: 1025px) {
  .page-inner {
    max-width: 1280px;
  }
  
  .navbar-inner {
    max-width: 1280px;
  }
  
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}