/* ============================================
   正和工业 — Brand Design System
   Primary Orange: #F18631
   Dark Gray:      #2D3847
   Accent Blue:    #1267FA
   ============================================ */

:root {
  --c-orange: #F18631;
  --c-orange-dark: #D97320;
  --c-orange-light: #FCEADC;
  --c-orange-glow: rgba(241, 134, 49, .15);
  --c-dark: #2D3847;
  --c-dark-deeper: #1A2332;
  --c-dark-soft: #44546A;
  --c-blue: #1267FA;
  --c-bg: #F7F8FA;
  --c-bg-warm: #FCEADC;
  --c-white: #FFFFFF;
  --c-text: #2D3847;
  --c-text-light: #6B7B8D;
  --c-border: #E2E6EB;
  --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', Helvetica, Arial, sans-serif;
  --max-w: 1200px;
  --nav-h: 72px;
  --radius: 4px;
  --shadow-sm: 0 2px 8px rgba(45, 56, 71, .06);
  --shadow-md: 0 8px 32px rgba(45, 56, 71, .1);
  --shadow-lg: 0 16px 48px rgba(45, 56, 71, .12);
  --transition: .3s cubic-bezier(.4, 0, .2, 1);
}

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; scroll-padding-top: var(--nav-h); }
body { font-family: var(--font); color: var(--c-text); background: var(--c-white); line-height: 1.7; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.text-accent { color: var(--c-orange); }

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}
.navbar.scrolled {
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}
.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
}
.nav-logo { display: flex; align-items: center; }
.logo-img { height: 40px; width: auto; transition: filter var(--transition); }
.navbar:not(.scrolled) .logo-img { filter: brightness(0) invert(1); }
.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-white);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.navbar.scrolled .nav-link { color: var(--c-text); }
.nav-link:hover { color: var(--c-orange); }
.nav-link--platform {
  background: var(--c-blue);
  color: var(--c-white) !important;
  padding: 8px 16px;
  font-size: 13px;
}
.nav-link--platform:hover { background: #0B5AD9; color: var(--c-white) !important; }
.nav-link--cta {
  background: var(--c-orange);
  color: var(--c-white) !important;
  padding: 8px 20px;
}
.nav-link--cta:hover { background: var(--c-orange-dark); color: var(--c-white) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-white);
  transition: all var(--transition);
}
.navbar.scrolled .nav-toggle span { background: var(--c-dark); }

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-dark-deeper);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-wave {
  position: absolute;
  width: 200%;
  height: 300px;
  border-radius: 40%;
  opacity: .08;
}
.hero-wave--1 {
  bottom: -100px;
  left: -50%;
  background: var(--c-orange);
  animation: heroWave 18s ease-in-out infinite;
}
.hero-wave--2 {
  bottom: -140px;
  left: -50%;
  background: var(--c-orange);
  opacity: .05;
  animation: heroWave 22s ease-in-out infinite reverse;
}
.hero-wave--3 {
  top: -80px;
  right: -60%;
  background: var(--c-orange);
  opacity: .04;
  animation: heroWave 25s ease-in-out infinite;
}
@keyframes heroWave {
  0%, 100% { transform: translateX(0) rotate(0deg); }
  50% { transform: translateX(3%) rotate(2deg); }
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
}
.hero-platform-card {
  width: min(920px, 100%);
  margin: 0 auto 28px;
  padding: 16px 18px;
  text-align: left;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, .18);
  backdrop-filter: blur(10px);
}
.hero-platform-card__badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--c-blue);
  background: rgba(18, 103, 250, .14);
  border-radius: 999px;
}
.hero-platform-card__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.hero-platform-card__text strong {
  display: block;
  margin-bottom: 4px;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-white);
}
.hero-platform-card__text span {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.72);
}
.hero-sub {
  font-size: 14px;
  letter-spacing: 6px;
  color: rgba(255,255,255,.5);
  margin-bottom: 24px;
  font-weight: 300;
}
.hero-title {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900;
  color: var(--c-white);
  line-height: 1.3;
  margin-bottom: 20px;
}
.hero-title .text-accent {
  background: linear-gradient(135deg, var(--c-orange), #FFB347);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: clamp(14px, 2vw, 18px);
  color: rgba(255,255,255,.6);
  margin-bottom: 40px;
  font-weight: 300;
  letter-spacing: 2px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  padding: 14px 36px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  font-family: var(--font);
}
.btn-primary {
  background: var(--c-orange);
  color: var(--c-white);
  box-shadow: 0 4px 20px rgba(241, 134, 49, .35);
}
.btn-primary:hover {
  background: var(--c-orange-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(241, 134, 49, .4);
}
.btn-outline {
  background: transparent;
  color: var(--c-white);
  border: 1.5px solid rgba(255,255,255,.3);
}
.btn-outline:hover {
  border-color: var(--c-orange);
  color: var(--c-orange);
  transform: translateY(-2px);
}
.btn-platform {
  background: var(--c-blue);
  color: var(--c-white);
  box-shadow: 0 4px 20px rgba(18, 103, 250, .3);
}
.btn-platform:hover {
  background: #0B5AD9;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(18, 103, 250, .4);
  color: var(--c-white);
}
.btn-m9m {
  background: var(--c-white);
  color: var(--c-dark);
  white-space: nowrap;
}
.btn-m9m:hover {
  color: var(--c-blue);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 255, 255, .14);
}
.btn-outline-dark {
  background: transparent;
  color: var(--c-dark);
  border: 1.5px solid var(--c-border);
}
.btn-outline-dark:hover {
  border-color: var(--c-blue);
  color: var(--c-blue);
  transform: translateY(-2px);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.3);
  font-size: 12px;
  letter-spacing: 2px;
}
.scroll-dot { animation: scrollDot 2s ease-in-out infinite; }
@keyframes scrollDot {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(8px); opacity: .3; }
}

/* Fade-up entrance */
.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp .8s ease forwards;
}
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   SECTION COMMON
   ============================================ */
.section {
  padding: 100px 0;
}
.section:nth-child(even) {
  background: var(--c-bg);
}
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 4px;
  color: var(--c-orange);
  font-weight: 500;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 16px;
}
.section-line {
  width: 48px;
  height: 3px;
  background: var(--c-orange);
  margin: 0 auto 20px;
  border-radius: 2px;
}
.section-desc {
  font-size: 16px;
  color: var(--c-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .8s ease, transform .8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   ABOUT / STATS
   ============================================ */
.about-content { max-width: 800px; margin: 0 auto 56px; }
.about-lead {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 16px;
  line-height: 1.8;
  color: var(--c-dark);
}
.about-text p { color: var(--c-text-light); line-height: 1.9; margin-bottom: 12px; }
.about-text strong { color: var(--c-orange); font-weight: 600; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  text-align: center;
  padding: 40px 20px;
  background: var(--c-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border-bottom: 3px solid transparent;
  transition: all var(--transition);
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--c-orange);
}
.stat-number {
  font-size: 48px;
  font-weight: 900;
  color: var(--c-orange);
  line-height: 1;
  display: inline-block;
  vertical-align: baseline;
}
.stat-suffix {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-orange);
  display: inline-block;
  vertical-align: baseline;
  margin-left: 2px;
}
.stat-label {
  font-size: 14px;
  color: var(--c-text-light);
  margin-top: 12px;
  display: block;
}

/* ============================================
   PLATFORM SHOWCASE
   ============================================ */
.platform-section {
  background: linear-gradient(135deg, var(--c-dark-deeper) 0%, #1A2B42 100%) !important;
  position: relative;
  overflow: hidden;
}
.platform-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 40px 40px;
}
.platform-section .section-tag { color: var(--c-blue); }
.platform-section .section-title { color: var(--c-white); }
.platform-section .section-line { background: var(--c-blue); }

.platform-showcase {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 56px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.platform-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--c-blue);
  background: rgba(18, 103, 250, .12);
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
}
.platform-info h3 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 16px;
  line-height: 1.4;
}
.platform-lead {
  font-size: 15px;
  color: rgba(255,255,255,.6);
  line-height: 1.8;
  margin-bottom: 28px;
}
.platform-features {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 36px;
}
.platform-feat {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.platform-feat svg {
  color: var(--c-blue);
  flex-shrink: 0;
  margin-top: 2px;
}
.platform-feat strong {
  display: block;
  font-size: 14px;
  color: var(--c-white);
  margin-bottom: 2px;
}
.platform-feat span {
  font-size: 13px;
  color: rgba(255,255,255,.45);
  line-height: 1.5;
}
.platform-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.platform-actions .btn { padding: 12px 24px; font-size: 14px; }
.platform-actions .btn-outline-dark {
  color: rgba(255,255,255,.6);
  border-color: rgba(255,255,255,.15);
}
.platform-actions .btn-outline-dark:hover {
  color: var(--c-blue);
  border-color: var(--c-blue);
}

/* Platform screen mockup */
.platform-visual { display: flex; justify-content: center; }
.platform-screen {
  width: 100%;
  max-width: 400px;
  background: var(--c-dark);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,.4), 0 0 0 1px rgba(255,255,255,.06);
}
.screen-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: rgba(255,255,255,.04);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.screen-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,.12);
}
.screen-dot:first-child { background: #FF5F56; }
.screen-dot:nth-child(2) { background: #FFBD2E; }
.screen-dot:nth-child(3) { background: #27CA40; }
.screen-url {
  margin-left: auto;
  font-size: 11px;
  color: rgba(255,255,255,.3);
  letter-spacing: .5px;
}
.screen-body {
  padding: 40px 32px;
  text-align: center;
}
.screen-logo {
  font-size: 36px;
  font-weight: 900;
  color: var(--c-blue);
  margin-bottom: 4px;
}
.screen-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-white);
  margin-bottom: 8px;
}
.screen-tagline {
  font-size: 12px;
  color: rgba(255,255,255,.35);
  letter-spacing: 2px;
  margin-bottom: 28px;
}
.screen-cards {
  display: flex;
  gap: 10px;
  justify-content: center;
}
.screen-card-mini {
  padding: 12px 14px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 8px;
  font-size: 12px;
  color: rgba(255,255,255,.6);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex: 1;
  transition: all var(--transition);
}
.screen-card-mini:hover {
  background: rgba(18, 103, 250, .1);
  border-color: rgba(18, 103, 250, .3);
}
.screen-card-mini span { font-size: 20px; }

/* ============================================
   TIMELINE
   ============================================ */
.timeline-section { background: var(--c-dark-deeper) !important; padding: 100px 0; }
.timeline-section .section-tag { color: var(--c-orange); }
.timeline-section .section-title { color: var(--c-white); }
.timeline-section .section-line { background: var(--c-orange); }

.timeline {
  position: relative;
  display: flex;
  justify-content: space-between;
  padding: 40px 0 0;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--c-orange) transparent;
}
.timeline-track {
  position: absolute;
  top: 58px;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(255,255,255,.1);
}
.timeline-item {
  flex: 0 0 auto;
  width: 140px;
  text-align: center;
  position: relative;
}
.timeline-year {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-orange);
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.timeline-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-orange);
  margin: 0 auto 20px;
  position: relative;
  z-index: 2;
  box-shadow: 0 0 0 4px rgba(241, 134, 49, .2);
}
.timeline-card h4 {
  font-size: 14px;
  color: var(--c-white);
  margin-bottom: 6px;
  font-weight: 600;
}
.timeline-card p {
  font-size: 12px;
  color: rgba(255,255,255,.5);
  line-height: 1.6;
}

/* ============================================
   SERVICES
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: var(--c-white);
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: var(--shadow-sm);
  border-bottom: 3px solid transparent;
  transition: all var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--c-orange);
}
.service-icon {
  width: 56px;
  height: 56px;
  color: var(--c-orange);
  margin-bottom: 20px;
}
.service-icon svg { width: 100%; height: 100%; }
.service-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--c-dark);
}
.service-card p {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.7;
}

/* ============================================
   SERVICE TIERS
   ============================================ */
.tiers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}
.tier-card {
  background: var(--c-white);
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: var(--shadow-sm);
  border-top: 4px solid var(--c-border);
  transition: all var(--transition);
  position: relative;
}
.tier-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.tier-card--1 { border-top-color: var(--c-text-light); }
.tier-card--2 {
  border-top-color: var(--c-orange);
  transform: scale(1.03);
  box-shadow: var(--shadow-md);
}
.tier-card--2:hover { transform: scale(1.03) translateY(-4px); }
.tier-card--3 { border-top-color: var(--c-dark); }

.tier-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--c-text-light);
  margin-bottom: 12px;
}
.tier-card--2 .tier-badge { color: var(--c-orange); }
.tier-popular {
  position: absolute;
  top: 16px;
  right: 20px;
  background: var(--c-orange);
  color: var(--c-white);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 2px;
}
.tier-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--c-dark);
}
.tier-features li {
  position: relative;
  padding: 8px 0 8px 22px;
  font-size: 14px;
  color: var(--c-text-light);
  border-bottom: 1px solid var(--c-border);
}
.tier-features li:last-child { border-bottom: none; }
.tier-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-orange-light);
  border: 2px solid var(--c-orange);
}

/* ============================================
   INDUSTRIES
   ============================================ */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.industry-card {
  text-align: center;
  padding: 36px 20px;
  background: var(--c-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border-bottom: 3px solid transparent;
}
.industry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--c-orange);
}
.industry-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: var(--c-orange);
}
.industry-icon svg { width: 100%; height: 100%; }
.industry-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--c-dark);
}
.industry-card p {
  font-size: 13px;
  color: var(--c-text-light);
}

/* ============================================
   CASES
   ============================================ */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--c-white);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--c-border);
  transition: all var(--transition);
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--c-orange);
}
.case-card--featured {
  border-left-color: var(--c-orange);
  background: linear-gradient(135deg, var(--c-white), var(--c-orange-light));
}
.case-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--c-orange);
  background: var(--c-orange-glow);
  padding: 3px 10px;
  border-radius: 2px;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.case-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 10px;
}
.case-desc {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}
.case-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.case-highlights span {
  font-size: 12px;
  color: var(--c-dark-soft);
  background: var(--c-bg);
  padding: 4px 10px;
  border-radius: 2px;
}

/* ============================================
   ADVANTAGES
   ============================================ */
/* advantages uses default section alternation */
.advantages-table {
  max-width: 960px;
  margin: 0 auto 48px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.adv-row {
  display: grid;
  grid-template-columns: 140px 1fr 1fr;
  border-bottom: 1px solid var(--c-border);
}
.adv-row:last-child { border-bottom: none; }
.adv-row--header {
  background: var(--c-dark);
  color: var(--c-white);
  font-weight: 600;
  font-size: 14px;
}
.adv-row--header .adv-cell { padding: 16px 20px; }
.adv-cell {
  padding: 14px 20px;
  font-size: 14px;
  display: flex;
  align-items: center;
}
.adv-cell--label {
  font-weight: 600;
  color: var(--c-dark);
  background: var(--c-bg);
  font-size: 13px;
}
.adv-cell--old {
  background: var(--c-white);
  color: var(--c-text-light);
}
.adv-cell--new {
  background: var(--c-orange-light);
  color: var(--c-dark);
  font-weight: 500;
}
.adv-row--header .adv-cell--old { background: transparent; }
.adv-row--header .adv-cell--new { background: var(--c-orange); color: var(--c-white); }

.adv-summary {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  max-width: 960px;
  margin: 0 auto;
}
.adv-summary-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--c-dark);
  font-size: 14px;
  font-weight: 500;
}
.adv-summary-item svg { color: var(--c-orange); flex-shrink: 0; }

/* ============================================
   CONTACT
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.contact-item {
  display: flex;
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--c-border);
}
.contact-item:last-child { border-bottom: none; }
.contact-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-orange-light);
  border-radius: var(--radius);
  color: var(--c-orange);
  flex-shrink: 0;
}
.contact-item h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-dark);
  margin-bottom: 4px;
}
.contact-item p {
  font-size: 14px;
  color: var(--c-text-light);
}
.contact-item a { color: var(--c-blue); }
.contact-item a:hover { text-decoration: underline; }
.contact-note {
  font-size: 12px;
  color: var(--c-text-light);
  margin-left: 4px;
}

.map-placeholder {
  width: 100%;
  height: 360px;
  background: var(--c-dark-deeper);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.4);
  gap: 12px;
}
.map-placeholder p {
  font-size: 18px;
  font-weight: 600;
  color: rgba(255,255,255,.7);
}
.map-placeholder span {
  font-size: 12px;
  letter-spacing: 4px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--c-dark-deeper);
  color: rgba(255,255,255,.6);
  padding: 64px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-logo { height: 36px; margin-bottom: 12px; filter: brightness(0) invert(1); }
.footer-brand p { font-size: 13px; line-height: 1.6; }
.footer-links h5,
.footer-contact h5 {
  font-size: 14px;
  color: var(--c-white);
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-links a {
  display: block;
  font-size: 13px;
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--c-orange); }
.footer-contact p {
  font-size: 13px;
  line-height: 1.8;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 12px;
  color: rgba(255,255,255,.3);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .platform-showcase { grid-template-columns: 1fr; gap: 40px; }
  .platform-visual { order: -1; }
  .platform-screen { max-width: 360px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .tiers-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .tier-card--2 { transform: none; }
  .tier-card--2:hover { transform: translateY(-4px); }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-table { overflow-x: auto; }
  .footer-top { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  .section { padding: 72px 0; }
  .section-header { margin-bottom: 40px; }

  /* Nav mobile */
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--c-white);
    flex-direction: column;
    padding: 80px 24px 24px;
    gap: 0;
    box-shadow: var(--shadow-lg);
    transition: right var(--transition);
  }
  .nav-menu.open { right: 0; }
  .nav-link {
    color: var(--c-dark) !important;
    padding: 14px 0;
    border-bottom: 1px solid var(--c-border);
    width: 100%;
  }
  .nav-link--cta {
    margin-top: 12px;
    border-bottom: none;
    text-align: center;
  }

  /* Hero */
  .hero-title { font-size: 28px; }
  .hero-desc { font-size: 14px; letter-spacing: 1px; }
  .btn { padding: 12px 28px; font-size: 14px; }
  .hero-platform-card {
    padding: 14px;
    margin-bottom: 22px;
  }
  .hero-platform-card__content {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-platform-card__text strong {
    font-size: 17px;
  }
  .hero-platform-card__text span {
    font-size: 13px;
  }
  .btn-m9m {
    width: 100%;
    justify-content: center;
  }

  /* Platform */
  .platform-actions { flex-direction: column; }
  .platform-actions .btn { text-align: center; }
  .screen-cards { flex-direction: column; gap: 8px; }
  .screen-body { padding: 28px 20px; }

  /* Stats */
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-number { font-size: 36px; }

  /* Timeline horizontal scroll */
  .timeline { gap: 0; padding-bottom: 16px; }
  .timeline-item { width: 120px; }

  /* Services */
  .services-grid { grid-template-columns: 1fr; }
  .service-card { padding: 28px 24px; }

  /* Industries */
  .industries-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }

  /* Cases */
  .cases-grid { grid-template-columns: 1fr; }

  /* Advantages table → stacked */
  .adv-row { grid-template-columns: 1fr; }
  .adv-row--header { display: none; }
  .adv-cell--label {
    font-size: 14px;
    font-weight: 700;
    padding: 12px 20px 4px;
    background: var(--c-white);
  }
  .adv-cell--old::before { content: '传统：'; font-weight: 600; color: var(--c-text-light); }
  .adv-cell--new::before { content: '正和：'; font-weight: 600; color: var(--c-orange); }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .map-placeholder { height: 240px; }

  /* Footer */
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 4px; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-card { padding: 28px 12px; }
  .stat-number { font-size: 32px; }
  .industries-grid { grid-template-columns: 1fr 1fr; }
  .adv-summary { flex-direction: column; gap: 16px; align-items: flex-start; padding: 0 16px; }
}