/* ===== VARIABLES ===== */
:root {
  --blue: #1E5AF5;
  --blue-dark: #1040C0;
  --blue-light: #E8F0FE;
  --orange: #FF7A00;
  --orange-light: #FFF3E0;
  --green: #10B981;
  --green-light: #ECFDF5;
  --dark: #0F172A;
  --gray: #475569;
  --gray-light: #F1F5F9;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, var(--blue) 0%, var(--orange) 100%);
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.25);
}

/* ===== RESET ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--dark);
  line-height: 1.6;
  background: var(--white);
  overflow-x: hidden;
}
html { scroll-behavior: smooth; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* ===== HEADER ===== */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: all 0.3s ease;
}
header.scrolled { box-shadow: var(--shadow-md); }
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo img { height: 72px; width: auto; }
.logo-text { font-size: 22px; font-weight: 900; color: var(--dark); }
.logo-text em {
  font-style: normal;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
nav { display: flex; gap: 28px; align-items: center; }
nav .nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--gray);
  transition: color 0.2s;
  position: relative;
}
nav .nav-link:hover, nav .nav-link.active { color: var(--blue); }
nav .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  border-radius: 1px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
}
.btn-primary {
  background: var(--gradient);
  color: white;
  box-shadow: 0 4px 14px rgba(30,90,245,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(30,90,245,0.45); }
.btn-outline {
  background: transparent;
  color: var(--blue);
  border: 2px solid var(--blue);
}
.btn-outline:hover { background: var(--blue); color: white; }
.btn-white {
  background: white;
  color: var(--blue);
  box-shadow: var(--shadow-md);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-sm { padding: 8px 18px; font-size: 13px; }
.btn-lg { padding: 14px 32px; font-size: 16px; }
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== CONTAINER ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== SECTION COMMON ===== */
section { padding: 80px 0; }
.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.section-label.orange { color: var(--orange); }
.section-title {
  font-size: 36px;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 16px;
  color: var(--gray);
  max-width: 600px;
  line-height: 1.7;
}
.gt {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #F8FAFF 0%, #FFFFFF 100%);
  padding-top: 72px;
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}
.hero-badge span {
  width: 8px; height: 8px;
  background: var(--orange);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
.hero h1 { font-size: 48px; font-weight: 900; line-height: 1.15; margin-bottom: 20px; letter-spacing: -0.5px; }
.hero-sub { font-size: 17px; color: var(--gray); line-height: 1.7; margin-bottom: 32px; max-width: 520px; }
.hero-btns { display: flex; gap: 16px; margin-bottom: 48px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; }
.hero-stat-num { font-size: 28px; font-weight: 900; color: var(--blue); }
.hero-stat-label { font-size: 13px; color: var(--gray); }

/* Hero Card */
.hero-visual { position: relative; }
.hero-card {
  background: white;
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow-xl);
  position: relative;
}
.hero-card-title { font-size: 16px; font-weight: 700; margin-bottom: 24px; }
.hero-card-path { display: flex; align-items: center; gap: 12px; padding: 10px 0; }
.hero-card-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}
.hero-card-dot.blue { background: var(--blue); }
.hero-card-dot.orange { background: var(--orange); }
.hero-card-dot.green { background: var(--green); }
.hero-card-line strong { display: block; font-size: 14px; color: var(--dark); }
.hero-card-line span { display: block; font-size: 12px; color: var(--gray); }
.hero-card-connector {
  width: 2px;
  height: 16px;
  background: linear-gradient(180deg, var(--blue), var(--orange));
  opacity: 0.2;
  margin-left: 5px;
}
.hero-float {
  position: absolute;
  padding: 10px 18px;
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  font-weight: 600;
  animation: float 3s ease-in-out infinite;
}
.hero-float.f1 { top: 90px; right: -10px; animation-delay: 0s; }
.hero-float.f2 { bottom: 60px; left: -10px; animation-delay: 1.5s; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ===== REVERSE PATH ===== */
.reverse-path { margin-top: 32px; max-width: 700px; margin-left: auto; margin-right: auto; }
.reverse-step { display: flex; gap: 14px; align-items: flex-start; position: relative; }
.reverse-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 23px;
  top: 44px;
  bottom: -12px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue), var(--orange));
  opacity: 0.3;
}
.reverse-icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.reverse-icon.ri1 { background: #FDF2F8; }
.reverse-icon.ri2 { background: var(--orange-light); }
.reverse-icon.ri3 { background: var(--green-light); }
.reverse-icon.ri4 { background: var(--blue-light); }
.reverse-icon.ri5 { background: var(--gray-light); }
.reverse-body { padding-bottom: 20px; }
.reverse-body h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.reverse-body p { font-size: 13px; color: var(--gray); line-height: 1.5; }
.reverse-arrow { text-align: center; color: var(--blue); font-size: 16px; padding: 4px 0; opacity: 0.4; }

/* ===== PRODUCT CARDS ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.product-card {
  background: #fff;
  border-radius: 16px;
  padding: 28px 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.product-card.featured {
  border: 2px solid var(--blue);
  box-shadow: 0 8px 30px rgba(30,90,245,0.12);
}
.product-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient);
  color: #fff;
  padding: 4px 16px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}
.product-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 14px;
}
.product-icon.p1 { background: var(--blue-light); }
.product-icon.p2 { background: var(--orange-light); }
.product-icon.p3 { background: var(--green-light); }
.product-icon.p4 { background: #FDF2F8; }
.product-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.product-price { margin-bottom: 12px; color: var(--gray); font-size: 13px; }
.product-price strong { font-size: 28px; font-weight: 900; color: var(--blue); }
.product-price strong small { font-size: 14px; font-weight: 600; }
.product-tag-line {
  font-size: 12px;
  color: var(--gray);
  margin-bottom: 14px;
  padding: 6px 10px;
  background: var(--gray-light);
  border-radius: 6px;
  line-height: 1.5;
}
.product-includes { flex: 1; margin-bottom: 20px; }
.product-includes li {
  list-style: none;
  font-size: 13px;
  color: var(--dark);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
  border-bottom: 1px solid #F1F5F9;
}
.product-includes li:last-child { border-bottom: none; }
.product-includes li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 700;
  font-size: 12px;
}
.product-includes .highlight {
  background: var(--blue-light);
  color: var(--blue);
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 600;
}
.product-card .btn { width: 100%; justify-content: center; }

/* ===== CASE STUDIES ===== */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.case-card {
  background: #fff;
  border-radius: 16px;
  padding: 0;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  transition: all 0.3s;
  overflow: hidden;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-top { padding: 20px 20px 14px; border-bottom: 1px solid #F1F5F9; }
.case-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.case-avatar.av1 { background: var(--gradient); }
.case-avatar.av2 { background: linear-gradient(135deg, #F59E0B, #EF4444); }
.case-avatar.av3 { background: linear-gradient(135deg, #8B5CF6, #EC4899); }
.case-avatar.av4 { background: linear-gradient(135deg, #06B6D4, #3B82F6); }
.case-avatar.av5 { background: linear-gradient(135deg, #10B981, #059669); }
.case-avatar.av6 { background: linear-gradient(135deg, #F97316, #EAB308); }
.case-name { font-weight: 700; font-size: 15px; margin-bottom: 2px; }
.case-bg { font-size: 12px; color: var(--gray); margin-bottom: 6px; }
.case-result { font-size: 13px; font-weight: 700; }
.case-result.blue { color: var(--blue); }
.case-result.orange { color: var(--orange); }
.case-result.green { color: var(--green); }
.case-body { padding: 16px 20px 20px; }
.case-body h5 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.case-body p { font-size: 13px; color: var(--gray); line-height: 1.6; margin-bottom: 12px; }
.case-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.case-tag {
  font-size: 11px;
  padding: 3px 8px;
  background: var(--gray-light);
  border-radius: 4px;
  color: var(--gray);
}

/* ===== WHY US ===== */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px; }
.why-card {
  text-align: center;
  padding: 32px 20px;
}
.why-icon {
  width: 64px; height: 64px;
  border-radius: 16px;
  background: var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 16px;
}
.why-card h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.why-card p { font-size: 13px; color: var(--gray); line-height: 1.6; }

/* ===== OVERVIEW (业务全景) ===== */
.overview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.overview-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  transition: all 0.3s;
  position: relative;
}
.overview-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.overview-card.primary {
  border: 2px solid var(--blue);
  box-shadow: 0 8px 30px rgba(30,90,245,0.08);
}
.overview-badge {
  position: absolute;
  top: -12px;
  left: 24px;
  background: var(--gradient);
  color: #fff;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
}
.overview-icon { font-size: 36px; margin-bottom: 16px; }
.overview-icon.o1 { color: var(--blue); }
.overview-icon.o2 { color: var(--orange); }
.overview-icon.o3 { color: var(--green); }
.overview-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.overview-card p { font-size: 14px; color: var(--gray); line-height: 1.6; margin-bottom: 16px; }
.overview-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s;
}
.overview-link:hover { gap: 8px; }

/* ===== PROCESS ===== */
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px; }
.process-step { text-align: center; position: relative; }
.process-num {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--gradient);
  color: white;
  font-size: 20px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.process-step h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.process-step p { font-size: 13px; color: var(--gray); line-height: 1.6; }

/* ===== CTA ===== */
.cta {
  background: var(--gradient);
  padding: 80px 24px;
  text-align: center;
  color: white;
}
.cta h2 { font-size: 32px; font-weight: 900; margin-bottom: 12px; }
.cta p { font-size: 16px; opacity: 0.85; margin-bottom: 32px; }

/* ===== WECHAT MODAL ===== */
.wechat-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.wechat-modal.show { opacity: 1; pointer-events: all; }
.wechat-modal-inner {
  background: white;
  border-radius: 20px;
  padding: 40px;
  text-align: center;
  max-width: 360px;
  width: 90%;
  position: relative;
  box-shadow: var(--shadow-xl);
}
.wechat-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--gray);
}
.wechat-qr {
  width: 260px;
  margin: 0 auto;
}

/* ===== COMPANY LOGOS ===== */
.company-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.company-logo-card {
  background: white;
  border: 1px solid #E8ECF4;
  border-radius: 12px;
  padding: 18px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  cursor: default;
}
.company-logo-card:hover {
  border-color: var(--blue);
  box-shadow: 0 4px 16px rgba(30,90,245,0.1);
  transform: translateY(-2px);
}
.company-logo-icon {
  font-size: 28px;
  margin-bottom: 8px;
  line-height: 1;
  text-align: center;
}
.company-logo-text {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-align: center;
  white-space: nowrap;
}
@media (max-width: 1024px) {
  .company-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 768px) {
  .company-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .company-logo-card { padding: 14px 8px; }
  .company-logo-text { font-size: 13px; }
}

/* ===== FOOTER ===== */
footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 64px 24px 32px;
}
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo-text { font-size: 22px; font-weight: 900; color: white; margin-bottom: 16px; }
.footer-brand .logo-text em {
  font-style: normal;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 320px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: white; margin-bottom: 16px; }
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  padding: 4px 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: white; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 40px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .overview-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  section { padding: 60px 0; }
  .hero h1 { font-size: 32px; }
  .hero-stats { gap: 24px; }
  .section-title { font-size: 28px; }
  nav { display: none; }
  nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    padding: 24px;
    box-shadow: var(--shadow-lg);
    gap: 16px;
  }
  .mobile-toggle { display: flex; }
  .product-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
  .hero-float { display: none; }
}