/* ===========================
   汉思智能官网 - 主样式文件
   =========================== */

:root {
  --primary: #002FA7;
  --primary-dark: #001D6E;
  --primary-light: #0045D9;
  --primary-bg: rgba(0,47,167,0.05);
  --purple: #2D3748;
  --green: #10B981;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-card: #FFFFFF;
  --card-bg: #FFFFFF;
  --card-border: rgba(0,0,0,0.08);
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --gradient-1: linear-gradient(135deg, #002FA7 0%, #0045D9 100%);
  --gradient-2: linear-gradient(135deg, #002FA7 0%, #475569 100%);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 2px 16px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 24px rgba(0,47,167,0.12);
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 15px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img { max-width: 100%; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.gradient-text {
  background: var(--gradient-1);
  -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: 100;
  padding: 20px 0;
  transition: var(--transition);
  background: rgba(255,255,255,0.95);
}

.navbar.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  padding: 14px 0;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo-company-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  line-height: 1.4;
  max-width: 200px;
}

.logo-text-group {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-en {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.logo-cn {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-secondary);
}

.logo-en {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.logo-icon {
  width: 38px; height: 38px;
  background: var(--gradient-1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 800;
  color: white;
  letter-spacing: -1px;
}

.logo-accent { color: rgba(255,255,255,0.7); }
.logo-text { color: var(--text-primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: 6px;
  transition: var(--transition);
}

.nav-links a:hover { color: var(--text-primary); background: rgba(0,47,167,0.06); }

.nav-links a.active {
  color: var(--primary);
  background: var(--primary-bg);
}

.btn-nav {
  background: var(--gradient-1) !important;
  color: white !important;
  padding: 10px 24px !important;
  border-radius: 6px !important;
  font-weight: 600 !important;
  font-size: 14px;
}
.btn-nav:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,47,167,0.25); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  width: 24px; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===========================
   Hero
   =========================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 140px 0 100px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,47,167,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,47,167,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.08;
  animation: glow-pulse 8s ease-in-out infinite;
}
.glow1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #002FA7, transparent 70%);
  top: -80px; left: -80px;
}
.glow2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #475569, transparent 70%);
  bottom: -40px; right: -40px;
  animation-delay: -4s;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.2; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(79,127,255,0.12);
  border: 1px solid rgba(79,127,255,0.3);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 13px;
  color: #88AAFF;
  font-weight: 500;
  margin-bottom: 28px;
}

.badge-dot {
  width: 7px; height: 7px;
  background: var(--primary);
  border-radius: 50%;
  animation: dot-blink 2s ease-in-out infinite;
}
@keyframes dot-blink { 0%,100%{opacity:1;} 50%{opacity:0.3;} }

.hero-title {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.hero-desc {
  font-size: clamp(15px, 1.8vw, 18px);
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto 40px;
}

.pc-br { display: block; }

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-1);
  color: white;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 26px;
  border-radius: 8px;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,47,167,0.25);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0,47,167,0.35); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 15px;
  padding: 12px 26px;
  border-radius: 8px;
  transition: var(--transition);
}
.btn-ghost:hover { background: var(--primary-bg); border-color: var(--primary); }

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 20px 40px;
  max-width: 680px;
  margin: 0 auto;
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 32px;
}

.stat-num {
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.stat-num em { font-style: normal; font-size: 18px; }

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

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

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 11px;
  animation: scroll-bounce 2.5s ease-in-out infinite;
}
.scroll-line {
  width: 1px; height: 36px;
  background: linear-gradient(to bottom, var(--primary), transparent);
}
@keyframes scroll-bounce {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ===========================
   Partners
   =========================== */
.partners {
  padding: 48px 0;
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
  background: var(--bg-secondary);
}

.partners-label {
  text-align: center;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 1px;
  margin-bottom: 28px;
}

.partners-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 56px;
  flex-wrap: wrap;
}

.partner-item {
  opacity: 0.75;
  transition: var(--transition);
}
.partner-item:hover { opacity: 1; transform: translateY(-2px); }

/* ===========================
   通用 Section
   =========================== */
section {
  padding: 120px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 72px;
}

.section-tag {
  display: inline-block;
  background: var(--primary-bg);
  border: 1px solid rgba(0,47,167,0.15);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.section-tag.light {
  background: rgba(0,0,0,0.04);
  border-color: rgba(0,0,0,0.08);
  color: var(--text-secondary);
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 580px;
  margin: 0 auto;
}

/* ===========================
   Products
   =========================== */
.products {
  background: var(--bg-secondary);
}

.products-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

.product-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 36px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-1);
  opacity: 0;
  transition: var(--transition);
}

.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(79,127,255,0.25); }
.product-card:hover::before { opacity: 1; }

.product-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.product-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-badge {
  background: rgba(79,127,255,0.12);
  border: 1px solid rgba(79,127,255,0.3);
  color: #88AAFF;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
}
.badge-purple {
  background: rgba(123,47,247,0.12);
  border-color: rgba(123,47,247,0.3);
  color: #BB86FC;
}

.product-name {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 6px;
}

.product-tagline {
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.product-desc {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 24px;
}

.product-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 32px;
}

.product-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.feat-dot {
  width: 6px; height: 6px;
  background: var(--primary);
  border-radius: 50%;
  flex-shrink: 0;
}
.feat-purple { background: var(--purple-light); }

.btn-product {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(79,127,255,0.12);
  border: 1px solid rgba(79,127,255,0.25);
  color: #88AAFF;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 8px;
  transition: var(--transition);
}
.btn-product:hover { background: var(--primary); border-color: var(--primary); color: white; }
.btn-product-purple {
  background: rgba(123,47,247,0.12);
  border-color: rgba(123,47,247,0.25);
  color: #BB86FC;
}
.btn-product-purple:hover { background: var(--purple); border-color: var(--purple); color: white; }

.product-compare {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--card-border);
}

.compare-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 24px;
  background: var(--card-bg);
  transition: var(--transition);
}
.compare-item:hover { background: rgba(79,127,255,0.05); }

.compare-icon { font-size: 24px; }
.compare-item h4 { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.compare-item p { font-size: 12px; color: var(--text-muted); }

/* ===========================
   Solutions
   =========================== */
.solutions { background: var(--bg-primary); }

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.solution-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.solution-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0,47,167,0.2);
  box-shadow: var(--shadow-hover);
}

.solution-num {
  font-size: 48px;
  font-weight: 900;
  color: var(--primary-bg);
  position: absolute;
  top: 20px; right: 24px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.solution-icon {
  width: 56px; height: 56px;
  background: var(--primary-bg);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 20px;
}

.solution-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 12px; letter-spacing: -0.3px; }
.solution-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 20px; }

.solution-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.solution-tags span {
  background: var(--primary-bg);
  border: 1px solid rgba(0,47,167,0.12);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 100px;
}

.solution-cta {
  background: var(--gradient-1);
  border-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
}
.solution-cta:hover { transform: translateY(-4px); box-shadow: 0 20px 60px rgba(79,127,255,0.4); }

.solution-cta-inner {
  text-align: center;
}
.solution-cta-inner h3 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.4;
  color: white !important;
}
.solution-cta-inner p {
  font-size: 15px;
  opacity: 0.95;
  margin-bottom: 24px;
  line-height: 1.6;
  color: white !important;
}

.btn-white {
  display: inline-block;
  background: white;
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: 8px;
  transition: var(--transition);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.25); }

/* ===========================
   Process
   =========================== */
.process {
  background: var(--dark-2);
  padding: 80px 0;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  padding: 0 20px;
}

.step-num {
  width: 56px; height: 56px;
  background: var(--gradient-1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
  color: white;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
  box-shadow: 0 8px 24px rgba(79,127,255,0.35);
}

.step-line {
  position: absolute;
  top: 28px;
  left: calc(50% + 28px);
  right: calc(-50% + 28px);
  height: 1px;
  background: linear-gradient(to right, var(--primary), rgba(79,127,255,0.2));
}
.process-step:last-child .step-line { display: none; }

.step-content h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.step-content p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ===========================
   Cases
   =========================== */
.cases { background: var(--dark); }

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  box-shadow: var(--shadow);
}
.case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,47,167,0.2);
  box-shadow: var(--shadow-hover);
}

.case-industry {
  display: inline-block;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.2);
  color: #10B981;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 14px;
}

.case-card h4 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.case-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 24px; }

.case-metrics {
  display: flex;
  gap: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--card-border);
}

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

.metric-num {
  font-size: 24px;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-label {
  font-size: 11px;
  color: var(--text-muted);
}

/* ===========================
   About
   =========================== */
.about { background: var(--dark-2); }

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-title {
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
  margin-top: 16px;
}

.about-desc {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-values {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.value-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.value-item:hover { background: rgba(79,127,255,0.05); border-color: rgba(79,127,255,0.2); }

.value-icon { font-size: 22px; flex-shrink: 0; }
.value-item h5 { font-size: 14px; font-weight: 700; margin-bottom: 3px; }
.value-item p { font-size: 12px; color: var(--text-muted); }

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-card-stack {
  position: relative;
  width: 300px;
  height: 320px;
}

.about-card {
  position: absolute;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  width: 220px;
  transition: var(--transition);
  cursor: default;
  box-shadow: var(--shadow);
}
.about-card:hover { transform: translateY(-4px) scale(1.02); box-shadow: var(--shadow-hover); }

.ac1 { top: 0; left: 0; border-left: 3px solid var(--primary); }
.ac2 { top: 100px; left: 80px; border-left: 3px solid var(--text-secondary); }
.ac3 { top: 200px; left: 40px; border-left: 3px solid var(--green); }

.ac-icon { font-size: 28px; margin-bottom: 8px; }
.about-card > div:nth-child(2) { font-size: 16px; font-weight: 700; margin-bottom: 3px; }
.ac-sub { font-size: 12px; color: var(--text-muted); }

/* ===========================
   Contact
   =========================== */
.contact {
  background: var(--dark-3);
  padding: 100px 0;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-title {
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  margin-top: 16px;
  letter-spacing: -0.5px;
}

.contact-desc {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 36px;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
}

.ci-icon {
  width: 44px; height: 44px;
  background: rgba(79,127,255,0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.ci-label { font-size: 12px; color: var(--text-muted); margin-bottom: 3px; }
.ci-value { font-size: 15px; font-weight: 600; }

/* Form */
.contact-form-wrap {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 36px;
}

.contact-form h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--card-border);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(0,0,0,0.03);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  padding: 11px 15px;
  transition: var(--transition);
  outline: none;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  background: rgba(0,47,167,0.04);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}
.form-group select option {
  background: var(--dark-3);
  color: var(--text-primary);
}

.btn-submit {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--gradient-1);
  color: white;
  font-size: 15px;
  font-weight: 600;
  padding: 13px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 8px 24px rgba(79,127,255,0.3);
  margin-top: 8px;
  font-family: inherit;
}
.btn-submit:hover { transform: translateY(-2px); box-shadow: 0 12px 36px rgba(79,127,255,0.45); }

.form-privacy {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
}
.form-privacy a { color: var(--primary); }

/* ===========================
   Footer
   =========================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--card-border);
  padding: 72px 0 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 60px;
  padding-bottom: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.footer-logo-img {
  height: 36px;
  width: auto;
  display: block;
  object-fit: contain;
}

.footer-slogan {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

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

.social-btn {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 6px;
  transition: var(--transition);
}
.social-btn:hover { background: rgba(79,127,255,0.1); border-color: rgba(79,127,255,0.3); color: var(--primary); }

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.footer-col h5 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--text-secondary); transform: translateX(3px); }

.footer-bottom {
  border-top: 1px solid var(--card-border);
  padding: 20px 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary); }

/* ===========================
   Back to Top
   =========================== */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px; height: 44px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 50%;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  z-index: 99;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { background: var(--primary); border-color: var(--primary); color: white; transform: translateY(-3px); }

/* ===========================
   响应式
   =========================== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: 1fr 1fr; }
  .solutions-grid { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: 1fr 1fr; gap: 40px; }
  .step-line { display: none; }
  .process-step:nth-child(1), .process-step:nth-child(3) { align-items: flex-start; text-align: left; }
  .process-step:nth-child(2), .process-step:nth-child(4) { align-items: flex-start; text-align: left; }
  .about-inner { grid-template-columns: 1fr; gap: 48px; }
  .about-visual { display: none; }
  .contact-inner { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: fixed; top: 70px; left: 0; right: 0; background: rgba(255,255,255,0.98); border-bottom: 1px solid var(--card-border); padding: 20px; gap: 6px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: 12px 16px; border-radius: 8px; }
  .hamburger span { background: var(--text-primary); }
  .hamburger { display: flex; }

  .hero { padding: 110px 0 60px; }
  .hero-title { font-size: 32px; }
  .hero-desc { font-size: 15px; }
  .pc-br { display: none; }
  .hero-stats { padding: 16px 20px; gap: 0; }
  .stat-item { padding: 0 16px; }
  .stat-num { font-size: 24px; }

  section { padding: 80px 0; }

  .products-grid { grid-template-columns: 1fr; }
  .product-compare { grid-template-columns: 1fr 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; gap: 32px; }
  .process-step { align-items: flex-start; text-align: left; }
  .footer-inner { grid-template-columns: 1fr; gap: 48px; }
  .footer-links { grid-template-columns: repeat(3, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .footer-bottom .container { flex-direction: column; gap: 8px; text-align: center; }

  section { padding: 64px 0; }
  .back-top { bottom: 20px; right: 20px; }
}

@media (max-width: 480px) {
  .hero-stats { flex-direction: column; gap: 12px; }
  .stat-divider { width: 40px; height: 1px; }
  .product-compare { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
}