/* ============================================
   艺速图文快印 — Apple 风格设计
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f7;
  --bg-dark: #342c2a;
  --text-primary: #342c2a;
  --text-secondary: #8c8886;
  --text-tertiary: #7a7572;
  --text-dark-bg: #f5f5f7;
  --text-dark-secondary: #b5b0ac;
  --accent: #1e99d5;
  --accent-hover: #1a8ac2;
  --accent-light: rgba(30, 153, 213, 0.1);
  --accent-glow: rgba(30, 153, 213, 0.4);
  --accent-alt: #d4147b;
  --accent-gold: #f0cb24;
  --border: rgba(0, 0, 0, 0.08);
  --border-dark: rgba(255, 255, 255, 0.12);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 40px 100px rgba(0, 0, 0, 0.15);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 36px;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-smooth: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-spring: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
}

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

ul { list-style: none; }

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

/* ---------- 导航栏 ---------- */
.nav-logo {
  padding: 6px 12px;
  border-radius: 10px;
  transition: background var(--transition-smooth);
}

.nav:not(.scrolled) .nav-logo {
  background: #ffffff;
}

.nav.scrolled .nav-logo {
  background: transparent;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
}
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 24px;
  transition: var(--transition-smooth);
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.nav.scrolled .nav-logo {
  color: var(--text-primary);
}

.nav:not(.scrolled) .nav-logo {
  color: #fff;
}

.logo-mark {
  background: var(--accent);
  color: #fff;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.logo-text {
  letter-spacing: 0.01em;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-link {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0;
  transition: color var(--transition-fast);
  position: relative;
}

.nav:not(.scrolled) .nav-link {
  color: #fff;
}

.nav:not(.scrolled) .nav-link:hover {
  color: #fff;
}

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

.nav.scrolled .nav-link:hover {
  color: var(--accent);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: currentColor;
  transition: width var(--transition-smooth);
}

.nav-link:hover::after {
  width: 100%;
}

/* 导航栏 CTA 按钮 */
.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  background: var(--accent);
  color: #fff;
  border-radius: 980px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-smooth);
  box-shadow: 0 2px 8px var(--accent-glow);
  white-space: nowrap;
  margin-left: 8px;
}

.btn-nav-cta:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 16px var(--accent-glow);
  transform: translateY(-1px);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: #fff;
  transition: var(--transition-smooth);
  border-radius: 1px;
}

.nav.scrolled .nav-toggle span {
  background: var(--text-primary);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(4.5px, 4.5px);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4.5px, -4.5px);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg-dark);
}

.hero-bg {
  position: absolute;
  inset: 0;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 50%, rgba(30, 153, 213, 0.25) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(212, 20, 123, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 50% 0%, rgba(240, 203, 36, 0.1) 0%, transparent 70%);
}

.hero-particles span {
  position: absolute;
  display: block;
  border-radius: 50%;
  animation: float 20s infinite ease-in-out;
}

.hero-particles span:nth-child(1) {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 70%);
  top: 20%; left: 10%;
  animation-delay: 0s;
}

.hero-particles span:nth-child(2) {
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(30,153,213,0.06) 0%, transparent 70%);
  top: 60%; left: 70%;
  animation-delay: -5s;
}

.hero-particles span:nth-child(3) {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(212,20,123,0.04) 0%, transparent 70%);
  top: 70%; left: 30%;
  animation-delay: -10s;
}

.hero-particles span:nth-child(4) {
  width: 250px; height: 250px;
  background: radial-gradient(circle, rgba(255,255,255,0.02) 0%, transparent 70%);
  top: 10%; left: 60%;
  animation-delay: -15s;
}

.hero-particles span:nth-child(5) {
  width: 150px; height: 150px;
  background: radial-gradient(circle, rgba(240,203,36,0.06) 0%, transparent 70%);
  top: 50%; left: 45%;
  animation-delay: -8s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -40px) scale(1.05); }
  50% { transform: translate(-20px, -20px) scale(0.95); }
  75% { transform: translate(-30px, 30px) scale(1.02); }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
  max-width: 860px;
  color: #fff;
}

.hero-eyebrow {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(40px, 7vw, 80px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}

.hero-title .text-accent {
  background: linear-gradient(135deg, #1e99d5 0%, #d4147b 60%, #f0cb24 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: clamp(16px, 2.2vw, 20px);
  color: rgba(255, 255, 255, 0.55);
  font-weight: 400;
  margin-bottom: 48px;
  line-height: 1.6;
}

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

.footer-logo-img {
  height: 40px;
  width: auto;
  display: block;
}

/* 滚动指示器 */
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.3);
  font-size: 11px;
  letter-spacing: 0.05em;
  z-index: 2;
  animation: fadeInUp 1s 1.5s both;
}

.scroll-dot {
  animation: scrollDot 2s infinite ease-in-out;
}

@keyframes scrollDot {
  0%, 100% { transform: translateY(0); opacity: 0.4; }
  50% { transform: translateY(6px); opacity: 1; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0;
  transition: all var(--transition-smooth);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-block {
  width: 100%;
}

/* ---------- Section 通用 ---------- */
.section {
  padding: 120px 24px;
  background: var(--bg-primary);
}

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

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

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  padding: 6px 14px;
  background: var(--accent-light);
  border-radius: 20px;
}

.section-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

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

.text-accent {
  color: var(--accent);
}

.section-sub {
  font-size: 19px;
  color: var(--text-secondary);
  margin-bottom: 60px;
  max-width: 560px;
}

/* ---------- 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-top: 48px;
}

.about-lead {
  font-size: 22px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.about-text p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 16px;
}

.about-stats {
  display: flex;
  gap: 48px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* 视觉卡片 */
.about-visual {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

.visual-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 32px 20px;
  text-align: center;
  transition: transform var(--transition-spring), box-shadow var(--transition-smooth);
}

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

.visual-card:first-child {
  margin-top: 40px;
}

.visual-card:last-child {
  margin-top: 80px;
}

.visual-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  color: var(--accent);
}

.visual-icon svg {
  width: 100%;
  height: 100%;
}

.visual-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-tertiary);
}

/* ---------- 服务项目 ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.service-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: all var(--transition-spring);
  cursor: default;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--accent);
}

.service-icon svg {
  width: 100%;
  height: 100%;
}

.service-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.service-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- 产品中心 ---------- */
.product-category {
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
}

.product-category:first-of-type {
  border-top: 1px solid var(--border);
}

.product-cat-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 40px;
}

.product-cat-icon {
  width: 56px;
  height: 56px;
  background: var(--accent-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}

.product-cat-icon svg {
  width: 32px;
  height: 32px;
}

.product-cat-header h3 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.product-cat-header p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.product-card {
  display: block;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-spring);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.product-card-img {
  aspect-ratio: 4/3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  transition: transform var(--transition-spring);
}

/* 产品卡片背景图片 */
.product-card-img img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-spring);
}

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

/* 暗色遮罩 — 确保白色文字可读 */
.product-card-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  z-index: 0;
  transition: background var(--transition-smooth);
}

.product-card:hover .product-card-img::before {
  background: rgba(0, 0, 0, 0.25);
}

.product-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  transition: background var(--transition-smooth);
}

.product-card:hover .product-card-img::after {
  background: rgba(0,0,0,0.1);
}

.product-card-title {
  position: relative;
  z-index: 1;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  text-align: center;
  letter-spacing: -0.01em;
  text-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.product-card-sub {
  position: relative;
  z-index: 1;
  font-size: 11px;
  color: rgba(255,255,255,0.8);
  text-align: center;
  margin-top: 4px;
  text-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

.product-card-info {
  display: none;
}

/* 更多品类 */
.product-more-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
}

.product-more-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition-spring);
}

.product-more-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background: var(--bg-primary);
}

.product-more-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: var(--accent);
}

.product-more-icon svg {
  width: 100%;
  height: 100%;
}

.product-more-card h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.product-more-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.product-cta {
  text-align: center;
  margin-top: 48px;
  padding-top: 24px;
}

/* 产品响应式 */
@media (max-width: 1200px) {
  .product-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 768px) {
  .product-category {
    padding: 40px 0;
  }

  .product-cat-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .product-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

  .product-card-title {
    font-size: 14px;
  }

  .product-card-sub {
    font-size: 10px;
  }

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

@media (max-width: 480px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

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

/* ---------- 订购须知 ---------- */
.order-flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  margin-bottom: 64px;
  flex-wrap: wrap;
}

.order-step {
  flex: 1;
  min-width: 200px;
  max-width: 280px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 24px 28px;
  text-align: center;
  transition: all var(--transition-spring);
  position: relative;
}

.order-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.order-step-number {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 980px;
  letter-spacing: 0.02em;
}

.order-step-icon {
  width: 56px;
  height: 56px;
  margin: 4px auto 16px;
  color: var(--accent);
}

.order-step-icon svg {
  width: 100%;
  height: 100%;
}

.order-step h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.order-step p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.order-step-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--accent);
  padding: 0 16px;
  margin-top: 40px;
  opacity: 0.5;
}

/* 订购详细信息 */
.order-details {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.order-detail-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  transition: all var(--transition-smooth);
}

.order-detail-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 0, 0, 0.12);
}

.order-detail-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.order-detail-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.order-detail-card li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.order-detail-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}

.order-detail-card li strong {
  color: var(--text-primary);
  font-weight: 600;
}

.order-cta {
  text-align: center;
  padding: 32px 0 16px;
}

.order-cta p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* 响应式：订购须知 */
@media (max-width: 768px) {
  .order-flow {
    flex-direction: column;
    align-items: center;
    gap: 32px;
  }

  .order-step {
    max-width: 100%;
  }

  .order-step-arrow {
    transform: rotate(90deg);
    margin-top: 0;
    padding: 0;
  }

  .order-details {
    grid-template-columns: 1fr;
  }

  .order-detail-card {
    padding: 20px 24px;
  }
}

/* ---------- 设备展示 ---------- */
.equipment-showcase {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  margin-top: 48px;
}

.equip-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-spring), box-shadow var(--transition-smooth);
}

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

.equip-featured {
  background: linear-gradient(135deg, #2a2321 0%, #342c2a 50%, #1e2328 100%);
  color: #fff;
}

.equip-featured .equip-model {
  color: #fff;
}

.equip-featured .equip-specs .spec-value {
  color: #fff;
}

.equip-featured .equip-specs .spec-name {
  color: rgba(255,255,255,0.55);
}

.equip-featured p {
  color: rgba(255,255,255,0.65);
}

.equip-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--accent);
  color: #fff;
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.equip-model {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.equip-specs {
  display: flex;
  gap: 32px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.equip-featured .equip-specs {
  border-color: rgba(255,255,255,0.12);
}

.spec {
  display: flex;
  flex-direction: column;
}

.spec-value {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.spec-name {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.equip-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- 优势 ---------- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(0,0,0,0.06);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 48px;
}

.advantage-item {
  background: var(--bg-primary);
  padding: 48px 32px;
  transition: background var(--transition-fast);
  position: relative;
}

.advantage-item:hover {
  background: rgba(0, 113, 227, 0.03);
}

.advantage-number {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.advantage-item h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.advantage-item p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- 联系我们 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  margin-top: 48px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}

.contact-icon svg {
  width: 22px;
  height: 22px;
}

.contact-item h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.contact-item p {
  font-size: 15px;
  color: var(--text-secondary);
}

.contact-item-wechat .wechat-qr {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-top: 8px;
  object-fit: cover;
}

/* 表单 */
.contact-form {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5l5 5 5-5' stroke='%2386868b' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 18px center;
  padding-right: 44px;
  cursor: pointer;
}

.form-group select:invalid {
  color: var(--text-secondary);
}

.btn-block {
  margin-top: 8px;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--bg-secondary);
  padding: 80px 24px 40px;
  border-top: 1px solid var(--border);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 64px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.01em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a,
.footer-col li {
  font-size: 13px;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  cursor: pointer;
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  font-size: 12px;
  color: var(--text-tertiary);
  text-align: center;
}

.footer-bottom .icp {
  margin-top: 6px;
}

.footer-bottom .icp a {
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ---------- 动画 ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.5s; }

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

/* 滚动出现 */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .equipment-showcase {
    grid-template-columns: 1fr;
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(29, 29, 31, 0.98);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    flex-direction: column;
    padding: 100px 40px;
    gap: 32px;
    transition: right var(--transition-spring);
  }

  .nav-links.active {
    right: 0;
  }

  .nav-links .nav-link {
    color: #fff !important;
    font-size: 20px;
    font-weight: 500;
  }

  .nav-toggle {
    display: flex;
    z-index: 1001;
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-desc {
    font-size: 16px;
  }

  .section {
    padding: 80px 20px;
  }

  .section-title {
    font-size: 30px;
  }

  .about-stats {
    flex-wrap: wrap;
    gap: 32px;
  }

  .about-visual {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .visual-card {
    padding: 20px 12px;
  }

  .visual-card:first-child,
  .visual-card:last-child {
    margin-top: 0;
  }

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

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

  .footer-links {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
  }

  .btn-outline {
    display: none;
  }

  .about-visual {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
  }

  .equip-specs {
    flex-wrap: wrap;
    gap: 20px;
  }

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