:root {
  --bg-base: #0d1025;
  --bg-deep: #060818;
  --bg-light: #1a1f3e;
  --text-primary: #ffffff;
  --text-secondary: #c5cae3;
  --text-muted: #7a82a6;
  --accent-blue: #4F8CFF;
  --accent-cyan: #00D4FF;
  --accent-red: #E63946;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow-glow: 0 8px 32px rgba(79, 140, 255, 0.18);
}

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

html { scroll-behavior: smooth; }

/* ====== 背景光斑层 ====== */
.bg-glow {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(79, 140, 255, 0.20), transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 30%, rgba(0, 212, 255, 0.10), transparent 60%),
    radial-gradient(ellipse 50% 40% at 10% 80%, rgba(79, 140, 255, 0.08), transparent 60%);
  will-change: transform;
}

body {
  font-family: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: #0d1025;
  background-image: none;
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ====== 导航 ====== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 90px;
  background: rgba(13, 16, 37, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}
.nav .container {
  padding: 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  font-weight: 800;
  font-size: 14px;
  letter-spacing: -0.5px;
  color: #fff;
  box-shadow: 0 4px 16px rgba(79, 140, 255, 0.4);
}
.logo-mark span:nth-child(2) { color: var(--accent-red); }
.logo-img {
  height: 36px;
  width: auto;
}
.footer-logo-img {
  height: 40px;
  width: auto;
  opacity: 0.85;
}
.nav-contact {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  font-family: "Manrope", -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: -0.3px;
}
.nav-contact-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-contact-icon {
  width: 20px;
  height: 20px;
}
.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
}
.nav-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-cta {
  padding: 8px 18px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  color: #fff;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(79, 140, 255, 0.4);
}

/* ====== 通用板块 ====== */
section {
  padding: 120px 0;
  position: relative;
}
.section-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.section-title {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.section-title .gradient {
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 760px;
  line-height: 1.7;
}
.section-header {
  margin-bottom: 64px;
}

/* ====== Hero ====== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 160px 0 120px;
  position: relative;
  overflow: hidden;
}
.hero-video {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 0;
  pointer-events: none;
}
.hero-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(13, 16, 37, 0.65);
  z-index: 1;
  pointer-events: none;
}
.hero-bg-img {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.25;
  z-index: 0;
  pointer-events: none;
}
.hero::before {
  content: '';
  position: absolute;
  top: 20%; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(79, 140, 255, 0.15) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
}
.hero h1 {
  font-size: 96px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 28px;
}
.hero h1 .gradient {
  background: linear-gradient(90deg, #fff 0%, var(--accent-cyan) 50%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 50px;
  color: var(--text-secondary);
  max-width: 820px;
  margin: 0 auto 40px;
  line-height: 1.6;
  white-space: nowrap;
}
.hero-tags {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  padding: 16px 32px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  font-size: 16px;
  letter-spacing: 1px;
  color: var(--text-primary);
  backdrop-filter: blur(10px);
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}
.hero-tag:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3), 0 0 40px rgba(0, 212, 255, 0.1);
  transform: translateY(-2px) scale(1.04);
  background: rgba(0, 212, 255, 0.08);
}
.tag-arrow {
  display: inline-block;
  margin-left: 12px;
  font-size: 18px;
  opacity: 0.4;
  transition: all 0.3s ease;
}
.hero-tag:hover .tag-arrow {
  opacity: 1;
  transform: translateX(3px);
}
.site-footer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  padding: 20px 90px 24px;
  font-size: 14px;
  color: #9ea4be;
  border-top: 1px solid var(--glass-border);
}
.site-footer p {
  margin: 0;
}
.hero-tag .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  margin-right: 8px;
  vertical-align: middle;
  box-shadow: 0 0 8px var(--accent-cyan);
}
.hero-cta {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  padding: 16px 32px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  color: #fff;
  box-shadow: 0 8px 28px rgba(79, 140, 255, 0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(79, 140, 255, 0.5);
}
.btn-ghost {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-cyan);
}
.btn-arrow {
  font-size: 18px;
  transition: transform 0.2s;
}
.btn:hover .btn-arrow { transform: translateX(4px); }

/* ====== 关于道致 ====== */
#about {
  position: relative;
  background:
    linear-gradient(180deg, rgba(13, 16, 37, 0.92) 0%, rgba(13, 16, 37, 0.88) 50%, rgba(13, 16, 37, 0.95) 100%),
    url('../assets/dzybg.png') center/cover no-repeat;
  overflow: hidden;
}
/* 点阵网格纹理 */
#about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(0, 212, 255, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.6) 15%, rgba(0,0,0,0.8) 50%, rgba(0,0,0,0.6) 85%, transparent 100%);
}
#about .container {
  position: relative;
  z-index: 1;
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-text p {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.about-text strong {
  color: var(--text-primary);
  font-weight: 600;
}
.about-highlight {
  background: linear-gradient(135deg, rgba(79, 140, 255, 0.1), rgba(0, 212, 255, 0.05));
  border-left: 3px solid var(--accent-cyan);
  padding: 20px 24px;
  border-radius: 0 12px 12px 0;
  margin-top: 28px;
  font-size: 16px;
  color: var(--text-primary);
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.stat-card {
  padding: 28px 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  transition: all 0.3s;
}
.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}
.stat-num {
  font-size: 36px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* ====== 关于道致 · 荣誉与资质合并区 ====== */
.about-honor {
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  position: relative;
}
.honor-mini-block h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}
.honor-mini-tag {
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  padding: 3px 8px;
  border-radius: 4px;
  background: linear-gradient(135deg, rgba(79, 140, 255, 0.15), rgba(0, 212, 255, 0.15));
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 212, 255, 0.25);
}
.honor-mini-block .honor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.honor-mini-block .honor-list li {
  padding: 8px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  backdrop-filter: blur(10px);
  margin: 0;
  transition: all 0.3s;
}
.honor-mini-block .honor-list li::before {
  content: none;
}
.honor-mini-block .honor-list li:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  transform: translateY(-2px);
}
.stat-plus {
  font-size: 0.7em;
  font-weight: 700;
  opacity: 0.85;
  margin-left: 1px;
}

/* ====== 两大核心业务 ====== */
.business-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.business-card {
  padding: 48px 40px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
}
.business-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
}
.business-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}
.business-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--accent-cyan);
  border-radius: 100px;
  font-size: 12px;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.business-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}
.business-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.business-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}
.business-points {
  list-style: none;
}
.business-points li {
  padding: 8px 0;
  color: var(--text-secondary);
  font-size: 14px;
  position: relative;
  padding-left: 20px;
}
.business-points li::before {
  content: '';
  position: absolute;
  left: 0; top: 16px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}
.business-flywheel {
  margin-top: 48px;
  padding: 36px 40px;
  background: linear-gradient(135deg, rgba(79, 140, 255, 0.08), rgba(0, 212, 255, 0.04));
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  text-align: center;
}
.business-flywheel h4 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--accent-cyan);
}
.business-flywheel p {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 720px;
  margin: 0 auto;
}

/* ====== 研发端产品矩阵 ====== */
.rd-section {
  background: linear-gradient(180deg, transparent, rgba(79, 140, 255, 0.03), transparent);
}
.rd-hero-card {
  padding: 40px 36px;
  background: linear-gradient(135deg, rgba(79, 140, 255, 0.1), rgba(0, 212, 255, 0.05));
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  margin-bottom: 48px;
  text-align: center;
}
.rd-hero-card h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}
.rd-hero-card p {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 640px;
  margin: 0 auto;
}
.rd-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.rd-card {
  padding: 28px 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  transition: all 0.3s;
  position: relative;
}
.rd-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}
.rd-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
}
.rd-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}
.rd-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.rd-line {
  margin-top: 48px;
  padding: 32px 36px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  text-align: center;
}
.rd-line h4 {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.rd-line p {
  font-size: 20px;
  font-weight: 600;
  background: linear-gradient(90deg, #fff, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ====== 4 阶段闭环 ====== */
.loop-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.loop-step {
  padding: 32px 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  position: relative;
  transition: all 0.3s;
}
.loop-step:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}
.loop-step-num {
  display: inline-block;
  width: 32px; height: 32px;
  line-height: 32px;
  text-align: center;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  color: #fff;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
}
.loop-step-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}
.loop-step-models {
  font-size: 13px;
  color: var(--accent-cyan);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.loop-step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.loop-quote {
  padding: 40px 36px;
  background: linear-gradient(135deg, rgba(79, 140, 255, 0.08), rgba(0, 212, 255, 0.03));
  border-left: 3px solid var(--accent-cyan);
  border-radius: 0 16px 16px 0;
  text-align: center;
}
.loop-quote p {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-primary);
}
.loop-quote .hl {
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ====== 生产端产品矩阵 ====== */
.prod-section {
  background: linear-gradient(180deg, transparent, rgba(0, 212, 255, 0.03), transparent);
}
.prod-hero {
  padding: 36px 32px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(79, 140, 255, 0.05));
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  margin-bottom: 48px;
  text-align: center;
}
.prod-hero h3 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 12px;
}
.prod-hero p {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 700px;
  margin: 0 auto;
}
.prod-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}
.prod-card {
  padding: 36px 32px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  backdrop-filter: blur(10px);
  position: relative;
  transition: all 0.3s;
}
.prod-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}
.prod-num {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 100px;
  color: var(--accent-cyan);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.prod-card h4 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}
.prod-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}
.prod-model {
  margin-top: 24px;
  padding: 32px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  text-align: center;
}
.prod-model h4 {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.prod-model p {
  font-size: 18px;
  color: var(--text-primary);
  line-height: 1.7;
}
.prod-model strong {
  color: var(--accent-cyan);
}

/* ====== 4 能力 + 4 机制 ====== */
.capability-section {
  background: linear-gradient(180deg, transparent, rgba(79, 140, 255, 0.03), transparent);
}
.cap-block {
  margin-bottom: 64px;
}
.cap-block-title {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}
.cap-block-title h3 {
  font-size: 28px;
  font-weight: 700;
}
.cap-block-title .bar {
  width: 4px; height: 28px;
  background: linear-gradient(180deg, var(--accent-blue), var(--accent-cyan));
  border-radius: 2px;
}
.cap-block-title .label {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 1px;
}
.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.cap-card {
  padding: 28px 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  transition: all 0.3s;
}
.cap-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}
.cap-num {
  display: inline-block;
  padding: 4px 10px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  color: #fff;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 14px;
}
.cap-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.cap-tag {
  font-size: 12px;
  color: var(--accent-cyan);
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.cap-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ====== 3 大应用领域 ====== */
.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.app-card {
  padding: 48px 36px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  backdrop-filter: blur(10px);
  text-align: center;
  transition: all 0.3s;
}
.app-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}
.app-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px; height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(79, 140, 255, 0.15), rgba(0, 212, 255, 0.08));
  border: 1px solid var(--glass-border);
  margin-bottom: 20px;
  font-size: 28px;
}
.app-name {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}
.app-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.app-note {
  margin-top: 32px;
  padding: 20px 28px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
}

/* ====== 合作方式 ====== */
.honor-list {
  list-style: none;
}
.honor-list li {
  padding: 12px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.2s;
}
.honor-list li:hover {
  border-color: var(--accent-cyan);
  transform: translateX(4px);
}
.honor-list li::before {
  content: '◆';
  color: var(--accent-cyan);
  font-size: 9px;
}
.patent-item {
  padding: 18px 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  text-align: center;
  transition: all 0.3s;
}
.patent-item:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}
.patent-num {
  font-size: 26px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 6px;
}
.patent-label {
  font-size: 12px;
  color: var(--text-muted);
}
.coop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}
.coop-card {
  padding: 36px 28px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  backdrop-filter: blur(10px);
  text-align: center;
  transition: all 0.3s;
}
.coop-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}
.coop-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--accent-cyan);
  border-radius: 100px;
  font-size: 12px;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.coop-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}
.coop-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.coop-note {
  padding: 20px 28px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}
.coop-note strong {
  color: var(--text-primary);
}

/* ====== CTA ====== */
.cta-section {
  background: linear-gradient(180deg, transparent, rgba(79, 140, 255, 0.05), transparent);
}
.cta-card {
  padding: 80px 60px;
  background: linear-gradient(135deg, rgba(79, 140, 255, 0.12), rgba(0, 212, 255, 0.06));
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 28px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  top: -50%; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(79, 140, 255, 0.15) 0%, transparent 60%);
  pointer-events: none;
}
.cta-card > * { position: relative; z-index: 1; }
.cta-card h2 {
  font-size: 44px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.2;
}
.cta-card p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 40px;
}
.cta-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ====== 底部 ====== */
.footer-inner {
  max-width: 720px;
  margin: 0 auto;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 20px;
  font-weight: 700;
}
.footer-info {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 20px;
}
.footer-info .sep { margin: 0 10px; }
.footer-copy {
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.5px;
}

/* ====== 4 大研发与生产平台 ====== */
.platform-section {
  position: relative;
}
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.platform-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 32px 26px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: transform 0.4s, border-color 0.4s, box-shadow 0.4s;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.platform-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(79,140,255,0.4), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}
.platform-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.35);
  box-shadow: 0 12px 40px rgba(79, 140, 255, 0.22);
}
.platform-card:hover::before {
  opacity: 1;
}
.platform-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(79,140,255,0.15), rgba(0,212,255,0.10));
  border: 1px solid rgba(0, 212, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: #00D4FF;
}
.platform-icon svg {
  width: 26px;
  height: 26px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.platform-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--accent-cyan);
  margin-bottom: 8px;
  font-family: "SF Mono", "Monaco", monospace;
}
.platform-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.platform-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 18px;
}
.platform-points {
  list-style: none;
  padding: 0;
  margin: 0;
}
.platform-points li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.platform-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4F8CFF, #00D4FF);
}
.platform-points li:last-child {
  margin-bottom: 0;
}
.platform-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding: 10px 20px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 8px;
  color: var(--accent-cyan);
  font-size: 13px;
  font-weight: 600;
  transition: all 0.25s;
}
.platform-btn:hover {
  background: rgba(0, 212, 255, 0.2);
  border-color: var(--accent-cyan);
  box-shadow: 0 4px 16px rgba(0, 212, 255, 0.2);
}
.platform-btn span {
  transition: transform 0.2s;
}
.platform-btn:hover span {
  transform: translateX(3px);
}

/* ====== 滚动动画（由 GSAP ScrollTrigger 驱动） ====== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
}

/* ====== 通用渐变文字 ====== */
.gradient {
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ====== 响应式 ====== */
@media (max-width: 1024px) {
  .rd-grid, .cap-grid { grid-template-columns: 1fr 1fr; }
  .loop-grid { grid-template-columns: 1fr 1fr; }
  .app-grid, .coop-grid { grid-template-columns: 1fr; }
  .about-grid, .business-grid, .prod-grid { grid-template-columns: 1fr; gap: 40px; }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .hero-tags {
    display: grid;
    grid-template-columns: auto auto;
    justify-content: center;
  }
}
@media (max-width: 720px) {
  section { padding: 80px 0; }
  .container { padding: 0 20px; }
  .nav { padding: 14px 20px; }
  .nav-links { display: none; }
  .nav-contact { font-size: 15px; gap: 14px; }
  .nav-contact-item { gap: 4px; }
  .nav-contact-icon { width: 16px; height: 16px; }
  .logo-img { height: 28px; }
  .hero { padding: 140px 0 80px; min-height: 100vh; }
  .hero h1 { font-size: 44px; }
  .hero-subtitle { font-size: 28px; white-space: normal; }
  .hero-tags { display: flex; flex-direction: column; align-items: center; gap: 14px; }
  .hero-tag { width: 100%; justify-content: center; }
  .site-footer { flex-direction: column; text-align: center; padding: 16px 20px; gap: 4px; }
  .hero-tag { padding: 16px 32px; font-size: 16px; width: 100%; justify-content: center; }
  .section-title { font-size: 30px; }
  .rd-grid, .cap-grid, .loop-grid { grid-template-columns: 1fr; }
  .cta-card { padding: 50px 28px; }
  .cta-card h2 { font-size: 28px; }
  .about-stats { grid-template-columns: 1fr 1fr; }
}