/* ═══════════════════════════════════════════
   咿吖科技 - iYa Tech 官网样式
   ═══════════════════════════════════════════ */

/* ── 基础重置 ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #080d18;
  --bg-secondary: #0c1322;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(0, 212, 255, 0.12);
  --border-hover: rgba(0, 212, 255, 0.3);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.15);
  --accent-glow: rgba(0, 212, 255, 0.4);
  --purple: #7c3aed;
  --purple-dim: rgba(124, 58, 237, 0.15);
  --gradient-cyan: linear-gradient(135deg, #00d4ff, #0088ff);
  --gradient-purple: linear-gradient(135deg, #7c3aed, #a855f7);
  --gradient-hero: linear-gradient(135deg, #00d4ff 0%, #0088ff 50%, #7c3aed 100%);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
  --radius: 10px;
  --radius-lg: 16px;
  --max-width: 1200px;
  --header-height: 72px;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── 粒子背景 ── */
#particles-js {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ── 页面包装 ── */
.page-wrapper {
  position: relative;
  z-index: 1;
}

/* ── 导航栏 ── */
.navbar {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(8, 13, 24, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background 0.3s, border-color 0.3s;
}

.navbar.scrolled {
  background: rgba(8, 13, 24, 0.95);
  border-bottom-color: rgba(0, 212, 255, 0.25);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 1px;
  text-shadow: 0 0 12px var(--accent-glow);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  transition: color 0.2s;
  padding: 0.4rem 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-primary);
  transition: 0.3s;
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--header-height) + 2rem) 1.5rem 4rem;
  position: relative;
}

.hero-content {
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1.2rem;
  border: 1px solid var(--border-hover);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 2rem;
  background: var(--accent-dim);
}

.hero h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1.5rem;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── 按钮 ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.8rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.3s;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: var(--gradient-cyan);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 136, 255, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 28px rgba(0, 136, 255, 0.5);
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  color: #fff;
}

/* ── 通用区块 ── */
.section {
  padding: 5rem 1.5rem;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-label {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
  display: block;
}

.section-header h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: #fff;
  margin-bottom: 0.8rem;
  letter-spacing: 1px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

/* ── 业务卡片网格 ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.35s;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--gradient-cyan);
  opacity: 0;
  transition: opacity 0.35s;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

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

.card-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1.2rem;
  background: var(--accent-dim);
  color: var(--accent);
}

.card-icon.purple {
  background: var(--purple-dim);
  color: var(--purple);
}

.card h3 {
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: 0.6rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ── 优势区块 ── */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.advantage-item {
  text-align: center;
  padding: 2rem 1.2rem;
  border-radius: var(--radius);
  transition: 0.3s;
}

.advantage-item:hover {
  background: var(--bg-card);
}

.advantage-num {
  font-family: 'Orbitron', sans-serif;
  font-size: 2.2rem;
  font-weight: 700;
  background: var(--gradient-cyan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.advantage-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ── 关于页 ── */
.about-hero {
  padding: calc(var(--header-height) + 4rem) 1.5rem 3rem;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.about-hero h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: #fff;
  margin-bottom: 1rem;
}

.about-hero .subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.info-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
}

.info-item .label {
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.info-item .value {
  color: #fff;
  font-size: 0.95rem;
}

.license-block {
  max-width: var(--max-width);
  margin: 3rem auto 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.license-block h3 {
  color: #fff;
  margin-bottom: 1.2rem;
  font-size: 1.1rem;
}

.license-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.license-grid .item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.license-grid .item .label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.license-grid .item .value {
  color: var(--text-primary);
  font-size: 0.92rem;
}

/* ── 产品页 ── */
.product-section {
  padding: calc(var(--header-height) + 4rem) 1.5rem 3rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.product-section h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: #fff;
  text-align: center;
  margin-bottom: 0.75rem;
}

.product-section > .subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 3.5rem;
}

.product-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
}

.product-card:last-child {
  border-bottom: none;
}

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

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

.product-badge {
  display: inline-block;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.72rem;
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

.product-badge.cyan {
  background: var(--accent-dim);
  color: var(--accent);
}

.product-badge.purple {
  background: var(--purple-dim);
  color: var(--purple);
}

.product-info h2 {
  font-size: 1.6rem;
  color: #fff;
  margin-bottom: 0.8rem;
}

.product-info .desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 1.2rem;
}

.product-info .features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.product-info .features li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding-left: 1.4rem;
  position: relative;
}

.product-info .features li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.product-visual {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Orbitron', sans-serif;
  color: var(--text-muted);
  font-size: 1.2rem;
  letter-spacing: 2px;
}

/* ── 联系页 ── */
.contact-hero {
  padding: calc(var(--header-height) + 4rem) 1.5rem 3rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.contact-hero h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: #fff;
  text-align: center;
  margin-bottom: 0.75rem;
}

.contact-hero > .subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 3rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.contact-form h3 {
  color: #fff;
  font-size: 1.15rem;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: #fff;
  font-size: 0.92rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.contact-info-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-info-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.contact-info-text .label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.contact-info-text .value {
  color: #fff;
  font-size: 0.92rem;
}

/* ── 底部 ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
  z-index: 1;
}

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

.footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}

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

.footer-copy {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.footer-copy a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-copy a:hover {
  color: var(--accent);
}

/* ── 响应式 ── */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(8, 13, 24, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1.2rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .product-card {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .product-card.reverse {
    direction: ltr;
  }

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

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

/* ── 动画 ── */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.bg-glow-1, .bg-glow-2 {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  z-index: 0;
  pointer-events: none;
  opacity: 0.12;
}

.bg-glow-1 {
  width: 500px; height: 500px;
  background: var(--accent);
  top: -10%; right: -15%;
}

.bg-glow-2 {
  width: 400px; height: 400px;
  background: var(--purple);
  bottom: -10%; left: -10%;
}

/* ── Stats 行（信任条） ── */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  max-width: var(--max-width);
  margin: -2rem auto 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
}

.stat-cell {
  padding: 1.6rem 1.2rem;
  text-align: center;
  border-right: 1px solid var(--border);
}

.stat-cell:last-child { border-right: none; }

.stat-value {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-cyan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
  margin-bottom: 0.3rem;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  letter-spacing: 1px;
}

/* ── 二级 Hero（子页用） ── */
.page-hero {
  padding: calc(var(--header-height) + 5rem) 1.5rem 3rem;
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2rem, 4.5vw, 3rem);
  color: #fff;
  margin-bottom: 1rem;
  letter-spacing: 1px;
  line-height: 1.25;
}

.page-hero .lead {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ── 价值主张三栏 ── */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.value-item {
  padding: 1.5rem;
  border-left: 2px solid var(--accent);
}

.value-item.purple { border-left-color: var(--purple); }

.value-item h4 {
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.value-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ── 产品大卡（强化版） ── */
.product-block {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
}

.product-block:last-child { border-bottom: none; }

.product-block-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.product-block.reverse .product-block-grid {
  grid-template-columns: 1fr 1.1fr;
}

.product-block.reverse .product-block-grid > :first-child {
  order: 2;
}

.product-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.72rem;
  padding: 0.35rem 0.9rem;
  border-radius: 4px;
  letter-spacing: 2px;
  margin-bottom: 1.2rem;
}

.product-eyebrow.cyan {
  background: var(--accent-dim);
  color: var(--accent);
}

.product-eyebrow.purple {
  background: var(--purple-dim);
  color: var(--purple);
}

.product-block-grid h2 {
  font-size: 2rem;
  color: #fff;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.product-block-grid .tagline {
  color: var(--accent);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.product-block-grid .desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.product-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.product-feature-list li {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  color: var(--text-primary);
  font-size: 0.92rem;
}

.product-feature-list li .check {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  margin-top: 2px;
}

.product-feature-list.purple li .check {
  background: var(--purple-dim);
  color: var(--purple);
}

.product-visual-card {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(124, 58, 237, 0.06)),
    var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: 'Orbitron', sans-serif;
  color: var(--text-muted);
  font-size: 1.1rem;
  letter-spacing: 2px;
  position: relative;
  overflow: hidden;
}

.product-visual-card::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 200px; height: 200px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--gradient-cyan);
  opacity: 0.08;
  filter: blur(40px);
}

.product-visual-card.purple::before {
  background: var(--gradient-purple);
}

.product-visual-card span {
  position: relative;
  z-index: 1;
}

.use-case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.use-case-tags .tag {
  padding: 0.25rem 0.7rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* ── 关于页：故事 + 价值 ── */
.story-section {
  max-width: 760px;
  margin: 0 auto;
}

.story-section .lead {
  font-size: 1.15rem;
  color: #fff;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-weight: 300;
}

.story-section p {
  color: var(--text-secondary);
  line-height: 1.9;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.values-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: var(--max-width);
  margin: 3rem auto 0;
}

.value-card {
  text-align: left;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: 0.3s;
}

.value-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.value-card-icon {
  font-size: 1.6rem;
  margin-bottom: 0.8rem;
}

.value-card h4 {
  color: #fff;
  margin-bottom: 0.4rem;
  font-size: 1rem;
}

.value-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  margin: 0;
}

/* ── 二维码展示卡 ── */
.qr-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  max-width: 600px;
  margin: 2rem auto;
  transition: 0.3s;
}

.qr-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.qr-card img {
  width: 140px;
  height: 140px;
  border-radius: 8px;
  background: #fff;
  padding: 8px;
  flex-shrink: 0;
}

.qr-card-content h4 {
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.qr-card-content p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
}

/* ── 联系页布局 ── */
.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.contact-methods {
  display: grid;
  gap: 1rem;
}

.contact-method {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: 0.3s;
}

.contact-method:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
}

.contact-method-icon {
  width: 42px; height: 42px;
  border-radius: 10px;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-method-body .label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
  letter-spacing: 0.5px;
}

.contact-method-body .value {
  color: #fff;
  font-size: 0.95rem;
}

.contact-qr-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  margin-top: 1.5rem;
}

.contact-qr-block img {
  width: 180px;
  height: 180px;
  border-radius: 8px;
  background: #fff;
  padding: 8px;
  margin-bottom: 1rem;
}

.contact-qr-block h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.contact-qr-block p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ── 表单升级 ── */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* ── 响应式 ── */
@media (max-width: 900px) {
  .stats-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-cell:nth-child(2) { border-right: none; }
  .stat-cell:nth-child(1),
  .stat-cell:nth-child(2) {
    border-bottom: 1px solid var(--border);
  }
  .value-grid,
  .values-row {
    grid-template-columns: 1fr;
  }
  .product-block-grid,
  .product-block.reverse .product-block-grid {
    grid-template-columns: 1fr;
  }
  .product-block.reverse .product-block-grid > :first-child {
    order: 0;
  }
  .contact-layout {
    grid-template-columns: 1fr;
  }
  .qr-card {
    flex-direction: column;
    text-align: center;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(8, 13, 24, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1.2rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }
}