*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #2C3E50;
  --primary-dark: #1a2733;
  --accent: #E87722;
  --accent-light: #f5944d;
  --bg: #f4f5f7;
  --surface: #ffffff;
  --text: #2C3E50;
  --text-light: #5a6a7a;
  --border: #dde2e8;
  --shadow: rgba(44, 62, 80, 0.08);
}
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.35; font-weight: 700; }
img { display: block; width: 100%; height: auto; }
a { color: var(--accent); text-decoration: none; }

/* Hero */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #34495e 100%);
  color: #fff;
  padding: 80px 24px 70px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%; 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: 0; left: 0; right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light), var(--accent));
}
.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 50px;
}
.hero-text { flex: 1; min-width: 0; }
.hero-text h1 {
  font-size: 2.4rem;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  position: relative;
}
.hero-text h1 span {
  display: inline-block;
  color: var(--accent);
  border-bottom: 3px solid var(--accent);
  padding-bottom: 4px;
}
.hero-text p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.78);
  max-width: 540px;
  margin-bottom: 28px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232,119,34,0.18);
  border: 1px solid rgba(232,119,34,0.4);
  color: #ffb876;
  padding: 8px 18px;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 600;
}
.hero-img {
  flex: 0 0 400px;
  height: 300px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.hero-img img { width: 100%; height: 100%; object-fit: cover; }

/* Container */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Section */
.section {
  padding: 64px 0;
}
.section + .section {
  border-top: 1px solid var(--border);
}

/* Intro grid */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.intro-grid.reverse .intro-img { order: -1; }
.intro-img {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 8px 32px var(--shadow);
  transition: transform 0.3s ease;
}
.intro-img:hover { transform: translateY(-4px); }
.intro-img img { width: 100%; height: auto; }
.intro-content h2 {
  font-size: 1.65rem;
  margin-bottom: 16px;
  color: var(--primary);
  position: relative;
  padding-left: 16px;
}
.intro-content h2::before {
  content: '';
  position: absolute;
  left: 0; top: 4px; bottom: 4px;
  width: 4px;
  background: var(--accent);
  border-radius: 2px;
}
.intro-content p {
  color: var(--text-light);
  margin-bottom: 14px;
  font-size: 0.98rem;
}

/* Equipment cards */
.equip-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 36px;
}
.equip-card {
  background: var(--surface);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 20px var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.equip-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(44,62,80,0.14);
}
.equip-card-img {
  height: 220px;
  overflow: hidden;
  position: relative;
}
.equip-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.equip-card:hover .equip-card-img img { transform: scale(1.05); }
.equip-card-img .label {
  position: absolute;
  top: 14px; left: 14px;
  background: var(--accent);
  color: #fff;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.equip-card-body {
  padding: 24px;
}
.equip-card-body h3 {
  font-size: 1.18rem;
  margin-bottom: 10px;
  color: var(--primary);
}
.equip-card-body p {
  font-size: 0.92rem;
  color: var(--text-light);
}

/* Key points list */
.keypoints {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}
.keypoint {
  background: var(--surface);
  border-radius: 10px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 4px 16px var(--shadow);
  transition: transform 0.3s ease;
  border-bottom: 3px solid transparent;
}
.keypoint:hover {
  transform: translateY(-4px);
  border-bottom-color: var(--accent);
}
.keypoint-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 800;
}
.keypoint h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--primary);
}
.keypoint p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.65;
}

/* CTA banner */
.cta-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 12px;
  padding: 52px 48px;
  display: flex;
  align-items: center;
  gap: 48px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 260px; height: 260px;
  background: radial-gradient(circle, rgba(232,119,34,0.2) 0%, transparent 70%);
  border-radius: 50%;
}
.cta-banner-img {
  flex: 0 0 320px;
  height: 240px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}
.cta-banner-img img { width: 100%; height: 100%; object-fit: cover; }
.cta-banner-text { flex: 1; position: relative; z-index: 1; }
.cta-banner-text h2 {
  font-size: 1.75rem;
  margin-bottom: 14px;
}
.cta-banner-text p {
  color: rgba(255,255,255,0.78);
  font-size: 0.98rem;
  margin-bottom: 24px;
}
.btn-accent {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 13px 32px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: background 0.25s ease, letter-spacing 0.3s ease;
  letter-spacing: 0.02em;
}
.btn-accent:hover {
  background: var(--accent-light);
  letter-spacing: 0.08em;
  color: #fff;
}

/* Comparison table */
.comp-table-wrap {
  margin-top: 36px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.comp-table {
  width: 100%;
  min-width: 700px;
  border-collapse: collapse;
  background: var(--surface);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 20px var(--shadow);
}
.comp-table thead th {
  background: var(--primary);
  color: #fff;
  padding: 16px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}
.comp-table tbody td {
  padding: 14px 18px;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-light);
}
.comp-table tbody tr:last-child td { border-bottom: none; }
.comp-table tbody tr:nth-child(even) { background: #f8f9fb; }
.comp-table tbody tr:hover { background: #eef2f7; }
.tag-good {
  display: inline-block;
  background: #e8f8ef;
  color: #1a9d55;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}
.tag-mid {
  display: inline-block;
  background: #fff7e6;
  color: #c97a10;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}
.tag-low {
  display: inline-block;
  background: #fde8e8;
  color: #c0392b;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* Full-width image band */
.img-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 36px;
}
.img-band-item {
  border-radius: 8px;
  overflow: hidden;
  height: 220px;
  box-shadow: 0 4px 16px var(--shadow);
  transition: transform 0.3s ease;
}
.img-band-item:hover { transform: scale(1.02); }
.img-band-item img { width: 100%; height: 100%; object-fit: cover; }

/* Two-col text with image sidebar */
.text-img-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  align-items: start;
  margin-top: 32px;
}
.text-img-row .side-img {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 8px 28px var(--shadow);
  position: sticky;
  top: 80px;
}

/* Section headings */
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-head h2 {
  font-size: 1.85rem;
  color: var(--primary);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}
.section-head h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}
.section-head p {
  color: var(--text-light);
  font-size: 1rem;
  max-width: 680px;
  margin: 16px auto 0;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner { flex-direction: column; gap: 28px; text-align: center; }
  .hero-img { flex: none; width: 100%; max-width: 460px; height: 240px; }
  .hero-text p { margin-left: auto; margin-right: auto; }
  .intro-grid { grid-template-columns: 1fr; gap: 28px; }
  .intro-grid.reverse .intro-img { order: 0; }
  .equip-grid { grid-template-columns: 1fr; }
  .keypoints { grid-template-columns: 1fr; }
  .cta-banner { flex-direction: column; padding: 36px 24px; gap: 24px; }
  .cta-banner-img { flex: none; width: 100%; height: 200px; }
  .img-band { grid-template-columns: 1fr; }
  .img-band-item { height: 200px; }
  .text-img-row { grid-template-columns: 1fr; }
  .text-img-row .side-img { position: static; }
  .section-head h2 { font-size: 1.45rem; }
  .hero-text h1 { font-size: 1.65rem; }
}
@media (max-width: 480px) {
  .hero { padding: 50px 16px 44px; }
  .container { padding: 0 16px; }
  .section { padding: 44px 0; }
  .equip-card-body { padding: 18px; }
}

        .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; }
        }