/* =====================================================
   括号(云南)信息技术有限公司 官网样式
   Design: Dark Tech Aesthetic + Glassmorphism + Neon
   ===================================================== */

/* ============ CSS 变量 / Design Tokens ============ */
:root {
  /* 主色 - 电光蓝 */
  --clr-primary: #00d4ff;
  --clr-primary-dim: rgba(0,212,255,0.15);
  --clr-primary-mid: rgba(0,212,255,0.4);

  /* 强调色 - 紫蓝渐变 */
  --clr-accent: #7c3aed;
  --clr-accent-2: #a855f7;

  /* 背景 */
  --clr-bg: #030712;
  --clr-bg-2: #0d1117;
  --clr-bg-3: #111827;
  --clr-surface: rgba(17,24,39,0.8);
  --clr-surface-2: rgba(31,41,55,0.6);

  /* 文字 */
  --clr-text: #f1f5f9;
  --clr-text-dim: #94a3b8;
  --clr-text-muted: #64748b;

  /* 边框 */
  --clr-border: rgba(255,255,255,0.08);
  --clr-border-glow: rgba(0,212,255,0.3);

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #00d4ff, #7c3aed);
  --gradient-1: linear-gradient(135deg, #00d4ff, #0ea5e9);
  --gradient-2: linear-gradient(135deg, #7c3aed, #a855f7);
  --gradient-3: linear-gradient(135deg, #10b981, #06b6d4);
  --gradient-4: linear-gradient(135deg, #f59e0b, #ef4444);

  /* 字体 */
  --font-sans: 'Noto Sans SC', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* 间距 */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* 圆角 */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;

  /* 过渡 */
  --ease-fast: 150ms ease;
  --ease-normal: 300ms ease;
  --ease-slow: 600ms cubic-bezier(0.33, 1, 0.68, 1);

  /* 阴影 */
  --shadow-glow: 0 0 30px rgba(0,212,255,0.2);
  --shadow-glow-strong: 0 0 60px rgba(0,212,255,0.3);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ============ 粒子画布 ============ */
#particleCanvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ============ 容器 ============ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ============ 辅助类 ============ */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============ 导航栏 ============ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: background var(--ease-normal), backdrop-filter var(--ease-normal);
}

.navbar.scrolled {
  background: rgba(3,7,18,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--clr-border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 2px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  transition: filter var(--ease-fast);
}

.nav-logo:hover { filter: brightness(1.2); }

.nav-logo-img {
  height: 44px;
  width: auto;
  max-width: 180px;
  display: block;
  object-fit: contain;
  transition: opacity var(--ease-fast), transform var(--ease-fast);
}

.nav-logo:hover .nav-logo-img {
  opacity: 0.85;
  transform: scale(1.03);
}

.footer-logo-link {
  display: inline-block;
  margin-bottom: 0.75rem;
}

.footer-logo-img {
  height: 52px;
  width: auto;
  max-width: 220px;
  display: block;
  object-fit: contain;
}

.logo-bracket {
  color: var(--clr-primary);
  font-size: 1.5rem;
  line-height: 1;
}

.logo-text {
  color: var(--clr-text);
  padding: 0 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--clr-text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: color var(--ease-fast), background var(--ease-fast);
}

.nav-link:hover {
  color: var(--clr-primary);
  background: var(--clr-primary-dim);
}

.nav-cta {
  margin-left: 0.5rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform var(--ease-normal), opacity var(--ease-normal);
}

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--clr-border);
  background: rgba(3,7,18,0.95);
}

.nav-mobile .nav-link {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--clr-border);
}

.nav-mobile .btn {
  margin-top: 1rem;
  text-align: center;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--ease-normal);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #000;
  font-weight: 700;
}

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

.btn-glow {
  animation: glowPulse 3s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0,212,255,0.2); }
  50% { box-shadow: 0 0 40px rgba(0,212,255,0.5), 0 0 80px rgba(124,58,237,0.3); }
}

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

.btn-ghost:hover {
  color: var(--clr-primary);
  border-color: var(--clr-primary);
  background: var(--clr-primary-dim);
}

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

.btn .arrow {
  display: inline-block;
  transition: transform var(--ease-fast);
}

.btn:hover .arrow { transform: translateX(4px); }

/* ============ Section 通用 ============ */
.section {
  position: relative;
  z-index: 1;
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--clr-primary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--clr-text-dim);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 5rem;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black, transparent);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 2rem 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--clr-primary);
  margin-bottom: 1.5rem;
  animation: fadeInDown 0.8s ease;
}

.badge-dot {
  width: 8px; height: 8px;
  background: var(--clr-primary);
  border-radius: 50%;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease 0.1s both;
}

.title-line {
  display: block;
}

.hero-title em {
  font-style: normal;
  color: var(--clr-primary);
}

.hero-description {
  font-size: 1.1rem;
  color: var(--clr-text-dim);
  max-width: 580px;
  margin-bottom: 2rem;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--clr-primary);
  line-height: 1;
}

.stat-unit {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-primary);
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  margin-top: 0.25rem;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--clr-border);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--clr-text-muted);
  font-size: 0.75rem;
  animation: fadeIn 1s ease 1s both;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--clr-primary), transparent);
  animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============ 服务卡片 ============ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.service-card {
  position: relative;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  transition: transform var(--ease-normal), border-color var(--ease-normal), box-shadow var(--ease-normal);
  cursor: default;
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.service-card:hover,
.service-card:focus {
  transform: translateY(-6px);
  border-color: var(--clr-border-glow);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  outline: none;
}

.service-card.featured {
  border-color: rgba(0,212,255,0.3);
  background: linear-gradient(135deg, rgba(0,212,255,0.05), rgba(124,58,237,0.08));
}

.featured-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--gradient-primary);
  color: #000;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  letter-spacing: 0.05em;
}

.service-icon {
  width: 52px;
  height: 52px;
  color: var(--clr-primary);
  margin-bottom: 1rem;
}

.service-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--clr-text-muted);
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.service-card p {
  color: var(--clr-text-dim);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}

.service-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.service-features li {
  font-size: 0.85rem;
  color: var(--clr-text-dim);
  padding-left: 1rem;
  position: relative;
}

.service-features li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--clr-primary);
}

.card-border-glow {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--ease-normal);
  background: radial-gradient(400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(0,212,255,0.08), transparent 60%);
}

.service-card:hover .card-border-glow { opacity: 1; }

/* ============ 案例卡片 ============ */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.case-card {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: default;
  transition: transform var(--ease-normal), border-color var(--ease-normal), box-shadow var(--ease-normal);
  backdrop-filter: blur(10px);
}

.case-card:hover, .case-card:focus {
  transform: translateY(-6px);
  border-color: var(--clr-border-glow);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  outline: none;
}

.case-image {
  height: 180px;
  overflow: hidden;
}

.case-img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.case-img-placeholder[data-color="1"] {
  background: linear-gradient(135deg, #0d1f3a 0%, #0a2a1a 100%);
}

.case-img-placeholder[data-color="2"] {
  background: linear-gradient(135deg, #1a0d3a 0%, #2a0a3a 100%);
}

.case-img-placeholder[data-color="3"] {
  background: linear-gradient(135deg, #1a0d0d 0%, #2a1a0a 100%);
}

.case-mock-ui {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mock-bar {
  height: 8px;
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
  width: 60%;
}

.mock-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 60px;
  padding: 0 4px;
}

.mock-bar-v {
  flex: 1;
  background: linear-gradient(to top, rgba(0,212,255,0.5), rgba(0,212,255,0.1));
  border-radius: 3px 3px 0 0;
  min-height: 8px;
}

.mock-grid {
  display: flex;
  gap: 6px;
}

.mock-card {
  flex: 1;
  height: 28px;
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,0.08);
}

.mock-phone {
  display: flex;
  justify-content: center;
}

.mock-phone-inner {
  width: 80px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px;
  background: rgba(255,255,255,0.05);
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
}

.mock-p-row {
  height: 6px;
  background: rgba(124,58,237,0.4);
  border-radius: 3px;
}

.mock-p-row.short { width: 60%; }

.mock-p-btn {
  height: 16px;
  background: rgba(124,58,237,0.6);
  border-radius: 4px;
}

.mock-table { display: flex; flex-direction: column; gap: 4px; }

.mock-t-row {
  height: 10px;
  background: rgba(255,255,255,0.06);
  border-radius: 3px;
}

.mock-t-row.header {
  height: 14px;
  background: rgba(245,158,11,0.3);
}

.case-info {
  padding: 1.5rem;
}

.case-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  background: var(--clr-primary-dim);
  color: var(--clr-primary);
  border: 1px solid rgba(0,212,255,0.2);
}

.case-info h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.case-info p {
  font-size: 0.88rem;
  color: var(--clr-text-dim);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.case-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

/* ============ 技术栈 ============ */
.tech-stack {
  background: linear-gradient(180deg, var(--clr-bg) 0%, var(--clr-bg-2) 50%, var(--clr-bg) 100%);
}

.tech-categories {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.tech-category {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  transition: border-color var(--ease-normal);
}

.tech-category:hover {
  border-color: rgba(0,212,255,0.2);
}

.tech-cat-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--clr-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--clr-border);
}

.tech-items {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tech-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--clr-text-dim);
  padding: 0.4rem 0;
  transition: color var(--ease-fast);
}

.tech-item:hover { color: var(--clr-text); }

.tech-icon {
  font-size: 1rem;
  width: 24px;
  text-align: center;
}

.tech-skills {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.skill-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.skill-pct {
  font-family: var(--font-mono);
  color: var(--clr-primary);
}

.skill-bg {
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 100px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  width: 0;
  background: var(--gradient-primary);
  border-radius: 100px;
  transition: width 1.5s cubic-bezier(0.33, 1, 0.68, 1);
}

/* ============ 流程 ============ */
.process {
  background: var(--clr-bg-2);
}

.process-timeline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.process-step {
  flex: 1;
  min-width: 160px;
  max-width: 200px;
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--ease-normal), transform var(--ease-normal);
}

.process-step:hover {
  border-color: var(--clr-border-glow);
  transform: translateY(-4px);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--clr-text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.step-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: block;
}

.process-step h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.process-step p {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  line-height: 1.5;
}

.process-arrow {
  font-size: 1.5rem;
  color: var(--clr-primary);
  opacity: 0.5;
  flex-shrink: 0;
}

/* ============ 关于我们 ============ */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-desc {
  color: var(--clr-text-dim);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.about-desc strong {
  color: var(--clr-primary);
  font-family: var(--font-mono);
}

.about-badges {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.about-badge {
  padding: 0.4rem 1rem;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--clr-text-dim);
}

.team-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.team-card {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
  transition: border-color var(--ease-normal), transform var(--ease-normal);
}

.team-card:hover {
  border-color: var(--clr-border-glow);
  transform: translateY(-4px);
}

.team-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: white;
  margin: 0 auto 0.75rem;
}

.team-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.team-card span {
  font-size: 0.75rem;
  color: var(--clr-primary);
  display: block;
  margin-bottom: 0.5rem;
}

.team-card p {
  font-size: 0.78rem;
  color: var(--clr-text-muted);
  line-height: 1.5;
}

.team-intro-box {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  height: 100%;
}

.team-intro-box p {
  color: var(--clr-text-dim);
  font-size: 0.95rem;
  line-height: 1.8;
}

.team-contact-link {
  color: var(--clr-primary);
  text-decoration: none;
  font-weight: 600;
  transition: opacity var(--ease-fast);
}

.team-contact-link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

/* ============ 评价 ============ */
.testimonials {
  background: var(--clr-bg-3);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.testimonial-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  backdrop-filter: blur(10px);
  transition: border-color var(--ease-normal), transform var(--ease-normal);
}

.testimonial-card:hover {
  border-color: rgba(0,212,255,0.2);
  transform: translateY(-4px);
}

.testimonial-stars {
  color: #f59e0b;
  font-size: 1rem;
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

.testimonial-card p {
  font-size: 0.9rem;
  color: var(--clr-text-dim);
  font-style: italic;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.testimonial-card footer {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.t-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #000;
  flex-shrink: 0;
}

.testimonial-card cite {
  display: block;
  font-style: normal;
  font-weight: 600;
  font-size: 0.9rem;
}

.testimonial-card span {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

/* ============ 联系 ============ */
.contact {
  background: var(--clr-bg);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: start;
}

.contact-desc {
  color: var(--clr-text-dim);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.ci-icon {
  font-size: 1.25rem;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--clr-primary-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-item strong {
  display: block;
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  margin-bottom: 0.2rem;
}

.contact-info-item span,
.contact-info-item a {
  font-size: 0.95rem;
  color: var(--clr-text-dim);
  text-decoration: none;
}

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

/* 表单 */
.contact-form {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  backdrop-filter: blur(10px);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--clr-text-dim);
}

.form-group label span {
  color: var(--clr-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  color: var(--clr-text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: border-color var(--ease-fast), box-shadow var(--ease-fast);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--clr-text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

.form-group select {
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-group select option {
  background: var(--clr-bg-3);
  color: var(--clr-text);
}

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

.form-success {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius-md);
  color: #10b981;
  font-size: 0.9rem;
  text-align: center;
}

/* ============ Footer ============ */
.footer {
  background: var(--clr-bg-2);
  border-top: 1px solid var(--clr-border);
  padding: 3rem 0 1.5rem;
  position: relative;
  z-index: 1;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.footer-logo {
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 0.5rem;
}

.footer-col a,
.footer-col span {
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  text-decoration: none;
  transition: color var(--ease-fast);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--clr-border);
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

/* ============ 返回顶部 ============ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 999;
  width: 48px;
  height: 48px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border-glow);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  cursor: pointer;
  transition: all var(--ease-normal);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-glow);
}

.back-to-top:hover {
  background: var(--clr-primary-dim);
  transform: translateY(-4px);
}

/* ============ 动画关键帧 ============ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

.animate-in {
  animation: fadeInUp 0.7s cubic-bezier(0.33, 1, 0.68, 1) both;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .about-layout { gap: 2.5rem; }
  .contact-layout { gap: 2.5rem; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-mobile.open { display: flex; }

  .hero-title { font-size: 2.5rem; }

  .services-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .tech-categories { grid-template-columns: 1fr 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }

  .about-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .form-row { grid-template-columns: 1fr; }

  .process-timeline {
    flex-direction: column;
    align-items: stretch;
  }

  .process-step { max-width: 100%; }
  .process-arrow {
    transform: rotate(90deg);
    align-self: center;
  }

  .footer-top { grid-template-columns: 1fr; gap: 2rem; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .hero-stats { gap: 1rem; }
  .stat-number { font-size: 1.5rem; }

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

@media (max-width: 480px) {
  .section { padding: 3rem 0; }
  .tech-categories { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .footer-links { grid-template-columns: 1fr; }
}

/* ============ 减少动画偏好 ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .hero-bg-grid, #particleCanvas { display: none; }
}