*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #2C3E50;
  --primary-dark: #1a2735;
  --accent: #E87722;
  --accent-light: #f4a261;
  --bg-light: #f7f8fa;
  --bg-white: #ffffff;
  --text-dark: #2c2c2c;
  --text-body: #4a4a4a;
  --text-muted: #7a8a9a;
  --border-light: #e8ecf0;
  --shadow-sm: 0 2px 8px rgba(44,62,80,0.08);
  --shadow-md: 0 4px 20px rgba(44,62,80,0.12);
  --shadow-lg: 0 8px 40px rgba(44,62,80,0.15);
}
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-body);
  line-height: 1.8;
  background: var(--bg-white);
  overflow-x: hidden;
}

/* Hero Section */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #34495e 100%);
  padding: 80px 0 60px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(232,119,34,0.15) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(232,119,34,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 48px;
  position: relative;
  z-index: 2;
}
.hero-text { flex: 1; }
.hero-text h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 20px;
}
.hero-text h1 span { color: var(--accent); }
.hero-text p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.78);
  line-height: 1.9;
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-img {
  flex: 0 0 500px;
  position: relative;
}
.hero-img img {
  width: 500px;
  height: 375px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  display: block;
}
.hero-img::after {
  content: '';
  position: absolute;
  top: 16px;
  left: 16px;
  right: -16px;
  bottom: -16px;
  border: 2px solid var(--accent);
  border-radius: 8px;
  z-index: -1;
}

/* Section common */
.section {
  padding: 72px 0;
}
.section-alt {
  background: var(--bg-light);
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-header {
  text-align: center;
  margin-bottom: 52px;
}
.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}
.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}
.section-header p {
  font-size: 1rem;
  color: var(--text-muted);
  margin-top: 16px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* Intro grid */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.intro-grid img {
  width: 600px;
  height: 450px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  display: block;
}
.intro-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
}
.intro-content p {
  margin-bottom: 16px;
  font-size: 0.98rem;
}

/* Feature cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--bg-white);
  border-radius: 10px;
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
  transform: scaleY(0);
  transition: transform 0.3s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.feature-card:hover::before {
  transform: scaleY(1);
}
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 0.93rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* Process section */
.process-steps {
  display: flex;
  gap: 0;
  position: relative;
  counter-reset: step;
}
.process-step {
  flex: 1;
  text-align: center;
  padding: 32px 20px;
  position: relative;
  counter-increment: step;
}
.process-step::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
  border-radius: 50%;
  margin: 0 auto 16px;
}
.process-step h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
}
.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 55px;
  right: -2px;
  width: calc(100% - 48px);
  height: 2px;
  background: var(--border-light);
  z-index: 0;
}

/* Two-col image text */
.dual-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.dual-layout.reverse { direction: rtl; }
.dual-layout.reverse > * { direction: ltr; }
.dual-layout img {
  width: 600px;
  height: 450px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  display: block;
}
.dual-content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
}
.dual-content p {
  font-size: 0.96rem;
  margin-bottom: 14px;
}

/* List style */
.tech-list {
  list-style: none;
  padding: 0;
}
.tech-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 14px;
  font-size: 0.95rem;
  line-height: 1.75;
}
.tech-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 2px;
  transform: rotate(45deg);
}

/* Image gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.gallery-item {
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.gallery-item img {
  width: 600px;
  height: 450px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.gallery-item:hover img {
  transform: scale(1.05);
}
.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(44,62,80,0.85));
  padding: 24px 16px 14px;
  color: #fff;
  font-size: 0.88rem;
  font-weight: 500;
}

/* CTA band */
.cta-band {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 56px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  border: 2px solid rgba(232,119,34,0.2);
  border-radius: 50%;
}
.cta-band h2 {
  font-size: 1.8rem;
  color: #fff;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-band p {
  color: rgba(255,255,255,0.75);
  font-size: 1rem;
  margin-bottom: 28px;
}
.cta-btn {
  display: inline-block;
  padding: 14px 42px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.3s ease, transform 0.2s ease;
  letter-spacing: 0.03em;
}
.cta-btn:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
}

/* Advantage blocks */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.advantage-block {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: var(--bg-white);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: box-shadow 0.3s ease;
}
.advantage-block:hover {
  box-shadow: var(--shadow-md);
}
.advantage-num {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
}
.advantage-block h3 {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
}
.advantage-block p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 3-col process image */
.triple-img {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 40px 0;
}
.triple-img img {
  width: 600px;
  height: 450px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  display: block;
}

/* Animation */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in {
  opacity: 0;
  animation: fadeUp 0.6s ease forwards;
}
.animate-in:nth-child(2) { animation-delay: 0.1s; }
.animate-in:nth-child(3) { animation-delay: 0.2s; }
.animate-in:nth-child(4) { animation-delay: 0.3s; }
.animate-in:nth-child(5) { animation-delay: 0.4s; }
.animate-in:nth-child(6) { animation-delay: 0.5s; }

/* Responsive */
@media (max-width: 1024px) {
  .hero-inner { flex-direction: column; text-align: center; }
  .hero-img { flex: none; max-width: 100%; }
  .hero-img img { width: 100%; height: auto; }
  .hero-img::after { display: none; }
  .hero-text p { margin-left: auto; margin-right: auto; }
  .intro-grid, .dual-layout { grid-template-columns: 1fr; gap: 32px; }
  .intro-grid img, .dual-layout img { width: 100%; height: auto; }
  .dual-layout.reverse { direction: ltr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { flex-wrap: wrap; }
  .process-step { flex: 1 1 45%; min-width: 200px; }
  .process-step:not(:last-child)::after { display: none; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-item img { width: 100%; height: auto; }
}
@media (max-width: 640px) {
  .hero { padding: 48px 0 40px; }
  .hero-text h1 { font-size: 1.65rem; }
  .section { padding: 48px 0; }
  .section-header h2 { font-size: 1.5rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .advantage-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .process-step { flex: 1 1 100%; }
  .triple-img { grid-template-columns: 1fr; }
  .triple-img img { width: 100%; height: auto; }
  .intro-grid img, .dual-layout img { width: 100%; height: auto; }
}

        .kuang-nav {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #fff;
            border-bottom: 2px solid #E87722;
            box-shadow: 0 2px 12px rgba(0,0,0,0.06);
        }

        .kuang-nav-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 60px;
            padding: 0 24px;
        }

        .kuang-nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }

        .kuang-nav-brand-icon {
            width: 36px;
            height: 36px;
            background: #E87722;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 18px;
        }

        .kuang-nav-brand-text {
            font-size: 17px;
            font-weight: 700;
            color: #2C3E50;
        }

        .kuang-nav-links {
            display: flex;
            align-items: center;
            gap: 2px;
            list-style: none;
        }

        .kuang-nav-links a {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: #3d4a5a;
            text-decoration: none;
            border-radius: 6px;
            transition: color 0.2s, background 0.2s;
            white-space: nowrap;
        }

        .kuang-nav-links a:hover,
        .kuang-nav-links a.kuang-active {
            color: #E87722;
            background: rgba(232,119,34,0.07);
        }

        .kuang-nav-phone {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: #E87722;
            text-decoration: none;
            flex-shrink: 0;
            transition: opacity 0.2s;
        }

        .kuang-nav-phone:hover { opacity: 0.75; }

        .kuang-hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            cursor: pointer;
            border: none;
            background: transparent;
            gap: 5px;
            -webkit-tap-highlight-color: transparent;
        }

        .kuang-hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: #2C3E50;
            border-radius: 2px;
            transition: transform 0.3s, opacity 0.3s;
        }

        .kuang-hamburger.kuang-open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
        .kuang-hamburger.kuang-open span:nth-child(2) { opacity: 0; }
        .kuang-hamburger.kuang-open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

        .kuang-mobile-menu {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 2px solid #E87722;
            box-shadow: 0 8px 24px rgba(0,0,0,0.1);
            z-index: 999;
            padding: 8px 0;
            transform: translateY(-8px);
            opacity: 0;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .kuang-mobile-menu.kuang-show {
            display: block;
            transform: translateY(0);
            opacity: 1;
        }

        .kuang-mobile-menu a {
            display: block;
            padding: 12px 24px;
            font-size: 16px;
            font-weight: 500;
            color: #3d4a5a;
            text-decoration: none;
            border-left: 3px solid transparent;
            transition: all 0.2s;
        }

        .kuang-mobile-menu a:hover,
        .kuang-mobile-menu a.kuang-active {
            color: #E87722;
            background: rgba(232,119,34,0.05);
            border-left-color: #E87722;
        }

        .kuang-mobile-menu .kuang-mob-phone {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 14px 24px;
            font-size: 16px;
            font-weight: 600;
            color: #E87722;
            text-decoration: none;
            border-top: 1px solid #eee;
            margin-top: 4px;
        }


        .kuang-footer {
            background: #1a2332;
            color: #c0c8d4;
        }

        .kuang-footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 44px 24px 0;
        }

        .kuang-footer-top {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .kuang-footer-brand {
            flex: 1 1 260px;
            min-width: 220px;
        }

        .kuang-footer-brand-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .kuang-footer-brand-icon {
            width: 36px;
            height: 36px;
            background: #E87722;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 17px;
            flex-shrink: 0;
        }

        .kuang-footer-brand-name {
            font-size: 18px;
            font-weight: 700;
            color: #e8ecf0;
        }

        .kuang-footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #7a8a9a;
            margin-bottom: 14px;
        }

        .kuang-footer-contact {
            display: flex;
            flex-direction: column;
        }

        .kuang-footer-contact a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #E87722;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 6px;
            transition: opacity 0.2s;
        }

        .kuang-footer-contact a:hover { opacity: 0.75; }

        .kuang-footer-nav {
            flex: 0 1 170px;
            min-width: 140px;
        }

        .kuang-footer-nav h3 {
            font-size: 14px;
            font-weight: 600;
            color: #e8ecf0;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .kuang-footer-nav ul { list-style: none; }

        .kuang-footer-nav ul li { margin-bottom: 10px; }

        .kuang-footer-nav ul li a {
            font-size: 14px;
            color: #7a8a9a;
            text-decoration: none;
            transition: color 0.2s, transform 0.2s;
            display: inline-block;
        }

        .kuang-footer-nav ul li a:hover {
            color: #E87722;
            transform: translateX(3px);
        }


        .kuang-footer-news {
            flex: 1 1 320px;
            min-width: 260px;
        }

        .kuang-footer-news h3 {
            font-size: 14px;
            font-weight: 600;
            color: #e8ecf0;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .kuang-news-list {
            display: flex;
            flex-direction: column;
        }

        .kuang-news-list a {
            display: block;
            padding: 9px 14px 9px 24px;
            font-size: 14px;
            color: #7a8a9a;
            text-decoration: none;
            border-radius: 5px;
            position: relative;
            line-height: 1.5;
            transition: color 0.2s, background 0.2s;
        }

        .kuang-news-list a::before {
            content: "";
            position: absolute;
            left: 10px;
            top: 50%;
            transform: translateY(-50%);
            width: 5px;
            height: 5px;
            background: #3a4a5e;
            border-radius: 50%;
            transition: background 0.2s;
        }

        .kuang-news-list a:hover {
            color: #E87722;
            background: rgba(232,119,34,0.06);
        }

        .kuang-news-list a:hover::before { background: #E87722; }

        .kuang-news-list a + a {
            border-top: 1px solid rgba(255,255,255,0.04);
        }


        .kuang-footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            padding: 18px 0 22px;
        }

        .kuang-footer-bottom p {
            font-size: 13px;
            color: #4e5a6a;
            margin: 0;
        }

        .kuang-footer-bottom-links {
            display: flex;
            gap: 18px;
        }

        .kuang-footer-bottom-links a {
            font-size: 13px;
            color: #4e5a6a;
            text-decoration: none;
            transition: color 0.2s;
        }

        .kuang-footer-bottom-links a:hover { color: #E87722; }


        .kuang-back-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            background: #E87722;
            color: #fff;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(232,119,34,0.35);
            opacity: 0;
            transform: translateY(12px);
            transition: all 0.3s ease;
            z-index: 800;
            -webkit-tap-highlight-color: transparent;
        }

        .kuang-back-top.kuang-visible {
            opacity: 1;
            transform: translateY(0);
        }

        .kuang-back-top:hover {
            background: #d06a1a;
            transform: translateY(-2px);
        }


        @media (max-width: 1024px) {
            .kuang-footer-top { gap: 32px; }
        }

        @media (max-width: 768px) {
            .kuang-nav-links { display: none; }
            .kuang-nav-phone { display: none; }
            .kuang-hamburger { display: flex; }
            .kuang-footer-inner { padding: 32px 20px 0; }
            .kuang-footer-top { flex-direction: column; gap: 28px; }
            .kuang-footer-brand,
            .kuang-footer-nav,
            .kuang-footer-news { flex: 1 1 100%; min-width: 0; }
            .kuang-footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 480px) {
            .kuang-nav-inner { padding: 0 14px; height: 54px; }
            .kuang-nav-brand-text { font-size: 15px; }
            .kuang-nav-brand-icon { width: 30px; height: 30px; font-size: 15px; border-radius: 6px; }
            .kuang-mobile-menu { top: 54px; }
            .kuang-footer-inner { padding: 26px 14px 0; }
            .kuang-news-list a { font-size: 13px; padding: 8px 10px 8px 20px; }
            .kuang-news-list a::before { left: 6px; width: 4px; height: 4px; }
            .kuang-back-top { width: 38px; height: 38px; bottom: 16px; right: 14px; border-radius: 8px; }
        }