/* ============ Reset & Base ============ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #002978;
  --primary-dark: #001a4d;
  --primary-light: #1a3f8f;
  --accent: #b30101;
  --accent-dark: #8a0101;
  --text-dark: #222;
  --text-gray: #666;
  --text-light: #999;
  --bg-light: #f6f8fc;
  --bg-white: #ffffff;
  --border: #e5e7eb;
  --shadow-sm: 0 2px 8px rgba(0, 41, 120, 0.06);
  --shadow-md: 0 6px 20px rgba(0, 41, 120, 0.1);
  --shadow-lg: 0 12px 40px rgba(0, 41, 120, 0.15);
  --radius: 8px;
  --radius-lg: 14px;
  --transition: all 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text-dark);
  line-height: 1.7;
  background: var(--bg-white);
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ Navbar - 蓝色头部 ============ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: #ffffff;
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 14px rgba(0, 41, 120, 0.1);
  transition: var(--transition);
  border-bottom: 1px solid rgba(0, 41, 120, 0.08);
}

.navbar.scrolled {
  background: #ffffff;
  box-shadow: 0 4px 20px rgba(0, 41, 120, 0.18);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
}

.logo-img {
  height: 48px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  display: block;
}

.logo-text {
  color: var(--primary);
}

.logo-mark {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #b30101, #ff6b6b);
  color: #fff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 4px 14px rgba(179, 1, 1, 0.45);
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-dark);
  border-radius: 6px;
  transition: var(--transition);
  cursor: pointer;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
  background: rgba(0, 41, 120, 0.06);
  box-shadow: inset 0 -2px 0 var(--accent);
}

.nav-link.external::after {
  content: "↗";
  margin-left: 4px;
  font-size: 12px;
  opacity: 0.7;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  margin-left: 10px;
  background: var(--accent);
  color: #fff !important;
  border-radius: 6px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(179, 1, 1, 0.25);
}

.nav-cta:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(179, 1, 1, 0.35);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 28px;
  color: var(--primary);
  cursor: pointer;
  padding: 4px 8px;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  margin-top: 80px;
  padding: 100px 0 120px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 60%, #001233 100%);
  overflow: hidden;
  color: #fff;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(179, 1, 1, 0.35) 0%, transparent 65%);
  border-radius: 50%;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -180px;
  left: -80px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(26, 63, 143, 0.5) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 1px;
  margin-bottom: 28px;
  backdrop-filter: blur(6px);
}

.hero-tag .dot {
  width: 8px;
  height: 8px;
  background: #ff5a5f;
  border-radius: 50%;
  box-shadow: 0 0 12px #ff5a5f;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: 48px;
  line-height: 1.25;
  font-weight: 800;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.hero h1 .accent {
  background: linear-gradient(90deg, #ffd6d6, #ff7a7a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 38px;
  max-width: 540px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 22px rgba(179, 1, 1, 0.35);
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(179, 1, 1, 0.45);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.45);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  transform: translateY(-2px);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.hero-stat .num {
  font-size: 34px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 8px;
}

.hero-stat .num small {
  font-size: 16px;
  font-weight: 500;
  margin-left: 4px;
  color: rgba(255, 255, 255, 0.7);
}

.hero-stat .label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.5px;
}

.hero-visual {
  position: relative;
}

.hero-card {
  position: relative;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent 50%);
  pointer-events: none;
}

.card-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(179, 1, 1, 0.25);
  border: 1px solid rgba(255, 120, 120, 0.4);
  color: #ffd2d2;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 22px;
}

.hero-card h3 {
  font-size: 22px;
  margin-bottom: 10px;
}

.hero-card p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  margin-bottom: 26px;
}

.card-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.card-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.88);
}

.card-feature .icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), #ff6b6b);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.float-card {
  position: absolute;
  background: #fff;
  color: var(--text-dark);
  padding: 16px 20px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: float 4s ease-in-out infinite;
}

.float-card.top {
  top: -30px;
  right: -20px;
  animation-delay: 0s;
}

.float-card.bottom {
  bottom: -30px;
  left: -20px;
  animation-delay: 2s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.float-card .ic {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(0, 41, 120, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.float-card .t {
  font-size: 13px;
  font-weight: 600;
}

.float-card .d {
  font-size: 11px;
  color: var(--text-gray);
}

/* ============ Section Common ============ */
.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--bg-light);
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px;
}

.section-eyebrow {
  display: inline-block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-title {
  font-size: 38px;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.25;
  margin-bottom: 18px;
}

.section-title .hl {
  color: var(--primary);
}

.section-desc {
  font-size: 16px;
  color: var(--text-gray);
  line-height: 1.8;
}

/* ============ 检测能力 Testing ============ */
.testing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.testing-card {
  position: relative;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border);
  overflow: hidden;
}

.testing-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.testing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.testing-card:hover::before {
  transform: scaleX(1);
}

.testing-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(0,41,120,0.1), rgba(0,41,120,0.04));
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin-bottom: 24px;
  transition: var(--transition);
}

.testing-card:hover .testing-icon {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  transform: rotate(-4deg) scale(1.05);
}

.testing-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-dark);
}

.testing-card p {
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.75;
  margin-bottom: 20px;
}

.testing-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.testing-list li {
  font-size: 13px;
  color: var(--text-gray);
  display: flex;
  align-items: center;
  gap: 8px;
}

.testing-list li::before {
  content: "✓";
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background: rgba(179, 1, 1, 0.1);
  color: var(--accent);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.testing-more {
  margin-top: 50px;
  text-align: center;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 18px;
}

.tag {
  padding: 8px 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-gray);
  transition: var(--transition);
  cursor: default;
}

.tag:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0, 41, 120, 0.04);
}

/* ============ 认证 Certification ============ */
.cert-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.cert-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4/5;
}

.cert-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cert-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0, 41, 120, 0.6) 100%);
}

.cert-image-badge {
  position: absolute;
  left: 24px;
  bottom: 24px;
  right: 24px;
  z-index: 2;
  color: #fff;
}

.cert-image-badge h4 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.cert-image-badge p {
  font-size: 13px;
  opacity: 0.88;
}

.cert-content .section-head {
  text-align: left;
  margin: 0 0 36px;
}

.cert-accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.cert-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.cert-item.open {
  border-color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 41, 120, 0.1);
}

.cert-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
}

.cert-head-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.cert-head .ic {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(179,1,1,0.12), rgba(179,1,1,0.04));
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.cert-head h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.cert-head span {
  font-size: 12px;
  color: var(--text-light);
}

.cert-arrow {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--bg-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-weight: 700;
}

.cert-item.open .cert-arrow {
  background: var(--primary);
  color: #fff;
  transform: rotate(180deg);
}

.cert-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.cert-item.open .cert-body {
  max-height: 320px;
}

.cert-body-inner {
  padding: 4px 24px 24px 84px;
}

.cert-body-inner p {
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 14px;
}

.cert-body-inner ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.cert-body-inner li {
  font-size: 12.5px;
  padding: 6px 14px;
  background: var(--bg-light);
  color: var(--text-dark);
  border-radius: 6px;
}

/* ============ 品牌影像 Brand ============ */
.brand-showcase {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  grid-template-rows: 220px 220px;
  gap: 20px;
}

.brand-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
}

.brand-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0, 41, 120, 0.85) 100%);
  transition: var(--transition);
}

.brand-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.brand-item:hover::after {
  background: linear-gradient(180deg, rgba(0, 41, 120, 0.25) 0%, rgba(0, 41, 120, 0.9) 100%);
}

.brand-item.big {
  grid-row: span 2;
}

.brand-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.brand-item:hover img {
  transform: scale(1.06);
}

.brand-caption {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 20px;
  z-index: 2;
  color: #fff;
}

.brand-caption h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

.brand-item.big .brand-caption h4 {
  font-size: 24px;
}

.brand-caption p {
  font-size: 13px;
  opacity: 0.85;
}

.brand-stats {
  margin-top: 70px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  padding: 44px 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-lg);
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.brand-stat {
  text-align: center;
}

.brand-stat .n {
  font-size: 42px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 10px;
  background: linear-gradient(90deg, #fff, #ffd2d2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-stat .l {
  font-size: 14px;
  opacity: 0.8;
  letter-spacing: 0.5px;
}

/* ============ 报告证书管理系统 CTA Section ============ */
.system-section {
  padding: 90px 0;
  background: linear-gradient(135deg, #f6f8fc 0%, #eef2fb 100%);
}

.system-card {
  position: relative;
  background: #fff;
  border-radius: 22px;
  padding: 70px 60px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 50px;
  align-items: center;
}

.system-card::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, rgba(179, 1, 1, 0.12), transparent 70%);
  border-radius: 50%;
}

.system-card::after {
  content: "";
  position: absolute;
  bottom: -120px;
  left: -80px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 41, 120, 0.12), transparent 70%);
  border-radius: 50%;
}

.system-left {
  position: relative;
  z-index: 2;
}

.system-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(179, 1, 1, 0.1);
  color: var(--accent);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 22px;
}

.system-card h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.25;
  margin-bottom: 18px;
}

.system-card h2 .hl {
  color: var(--primary);
}

.system-card p {
  font-size: 16px;
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 32px;
}

.system-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 36px;
}

.system-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-dark);
  font-weight: 500;
}

.system-feature .ic {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 8px;
  background: rgba(0, 41, 120, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.system-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-dark {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 22px rgba(0, 41, 120, 0.25);
}

.btn-dark:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 41, 120, 0.35);
}

.btn-ghost {
  background: #fff;
  color: var(--primary);
  border: 1.5px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--primary);
  background: rgba(0, 41, 120, 0.04);
  transform: translateY(-2px);
}

.system-right {
  position: relative;
  z-index: 2;
}

/* 右侧改为一张整图（地址写死；换图直接替换 public/static/index/images/asd.jpg 即可） */
.system-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  box-shadow: 0 20px 50px rgba(0, 41, 120, 0.18);
}

.system-mockup {
  position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 18px;
  padding: 26px;
  color: #fff;
  box-shadow: 0 20px 50px rgba(0, 41, 120, 0.3);
}

.mockup-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  margin-bottom: 20px;
}

.mockup-head h5 {
  font-size: 15px;
  font-weight: 700;
}

.mockup-status {
  font-size: 12px;
  padding: 4px 12px;
  background: rgba(76, 217, 100, 0.2);
  border: 1px solid rgba(120, 255, 140, 0.35);
  color: #a8f0b5;
  border-radius: 999px;
}

.mockup-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.mockup-item {
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
}

.mockup-item .n {
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 6px;
}

.mockup-item .l {
  font-size: 12px;
  opacity: 0.75;
}

.mockup-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mockup-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  font-size: 12.5px;
}

.mockup-list-item .lv {
  color: rgba(255, 255, 255, 0.85);
}

.mockup-list-item .rs {
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.mockup-list-item .rs.ok {
  background: rgba(76, 217, 100, 0.2);
  color: #a8f0b5;
}

.mockup-list-item .rs.warn {
  background: rgba(255, 193, 7, 0.2);
  color: #ffe58a;
}

/* ============ Footer ============ */
.footer {
  background: linear-gradient(180deg, #001a4d 0%, #001233 100%);
  color: rgba(255, 255, 255, 0.75);
  padding-top: 80px;
}

.footer-top {
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1.8fr 1.8fr 1fr;
  gap: 40px;
}

.footer-brand h3 {
  font-size: 22px;
  color: #fff;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-logo-img {
  height: 40px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
}

.footer-brand .logo-mark {
  background: linear-gradient(135deg, var(--accent), #ff6b6b);
  box-shadow: 0 4px 16px rgba(179, 1, 1, 0.4);
}

.footer-brand p {
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 22px;
}

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

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-3px);
}

.footer-col h4 {
  font-size: 15px;
  color: #fff;
  font-weight: 700;
  margin-bottom: 22px;
  padding-bottom: 12px;
  position: relative;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 2px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul.col-2 {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.footer-col ul.col-2 li {
  width: calc(50% - 12px);
}

.footer-col ul.col-2 li a {
  font-size: 13px;
}

.footer-col li a {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.6);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.footer-col li a::before {
  content: "›";
  color: var(--accent);
  font-weight: 700;
  opacity: 0;
  transform: translateX(-6px);
  transition: var(--transition);
}

.footer-col li a:hover {
  color: #fff;
  padding-left: 6px;
}

.footer-col li a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-contact .item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.footer-contact .ic {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 10px;
  background: rgba(179, 1, 1, 0.18);
  color: #ff8a8a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}

.footer-contact .text .t {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 4px;
  letter-spacing: 0.5px;
}

.footer-contact .text .v {
  font-size: 14px;
  color: #fff;
  font-weight: 600;
  line-height: 1.5;
}

.footer-qr {
  text-align: center;
}

.qr-box {
  width: 118px;
  height: 118px;
  margin: 0 auto 14px;
  background: #fff;
  border-radius: 12px;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.25);
}

.qr-box-inner {
  width: 100%;
  height: 100%;
  background:
    linear-gradient(45deg, #222 25%, transparent 25%),
    linear-gradient(-45deg, #222 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #222 75%),
    linear-gradient(-45deg, transparent 75%, #222 75%);
  background-size: 10px 10px;
  background-position: 0 0, 0 5px, 5px -5px, -5px 0;
  border-radius: 4px;
  position: relative;
}

.qr-box-inner::before,
.qr-box-inner::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 28px;
  background: #222;
  border-radius: 4px;
}

.qr-box-inner::before {
  top: 4px;
  left: 4px;
  box-shadow: inset 0 0 0 4px #fff;
}

.qr-box-inner::after {
  top: 4px;
  right: 4px;
  box-shadow: inset 0 0 0 4px #fff;
}

.footer-qr p {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.55);
}

.footer-qr .qr-title {
  font-size: 13px;
  color: #fff;
  font-weight: 600;
  margin-bottom: 4px;
}

.footer-middle {
  padding: 36px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-partners {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px 36px;
}

.footer-partners span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.38);
  letter-spacing: 1px;
}

.footer-partners .partner {
  padding: 8px 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  transition: var(--transition);
  letter-spacing: 0.5px;
  background: rgba(255, 255, 255, 0.02);
}

.footer-partners .partner:hover {
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.45);
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.footer-bottom-links a {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.45);
  transition: var(--transition);
}

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

.footer-bottom-links .sep {
  width: 1px;
  height: 12px;
  background: rgba(255, 255, 255, 0.15);
}

/* ============ Back to top ============ */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 999;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 8px 22px rgba(0, 41, 120, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: var(--transition);
}

.to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  background: var(--accent);
  box-shadow: 0 10px 26px rgba(179, 1, 1, 0.4);
  transform: translateY(-4px);
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .testing-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-qr { grid-column: span 3; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 38px; }
  .cert-layout { grid-template-columns: 1fr; gap: 40px; }
  .system-card { grid-template-columns: 1fr; padding: 50px 36px; }
  .brand-stats { grid-template-columns: repeat(2, 1fr); gap: 24px; padding: 36px 24px; }
  .brand-showcase { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .brand-item.big { grid-row: auto; grid-column: span 2; height: 260px; }
}

@media (max-width: 768px) {
  .navbar-inner { height: 68px; }
  .logo-img { height: 40px; }
  .nav-menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    align-items: stretch;
    padding: 18px 16px;
    gap: 6px;
    box-shadow: 0 12px 30px rgba(0, 41, 120, 0.18);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border-top: 1px solid var(--border);
  }
  .nav-menu .nav-link {
    color: var(--text-dark);
    padding: 14px 16px;
    border-radius: 8px;
    font-size: 16px;
  }
  .nav-menu .nav-link:hover,
  .nav-menu .nav-link.active {
    background: rgba(0, 41, 120, 0.06);
    color: var(--primary);
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .mobile-toggle { display: block; }
  .nav-cta { margin: 10px 0 0; text-align: center; justify-content: center; }

  .hero { margin-top: 68px; padding: 60px 0 80px; }
  .hero h1 { font-size: 30px; }
  .hero-desc { font-size: 15px; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .hero-stat .num { font-size: 24px; }

  .section { padding: 70px 0; }
  .section-title { font-size: 28px; }
  .section-head { margin-bottom: 40px; }

  .testing-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .footer-qr { grid-column: auto; }
  .footer-brand { grid-column: span 2; }

  .system-card { padding: 40px 24px; }
  .system-card h2 { font-size: 26px; }
  .system-features { grid-template-columns: 1fr; }

  .brand-showcase { grid-template-columns: 1fr; }
  .brand-item.big { grid-column: auto; height: 240px; }
  .brand-item { height: 220px; }
  .brand-stats { grid-template-columns: repeat(2, 1fr); }
  .brand-stat .n { font-size: 32px; }

  .cert-body-inner { padding-left: 24px; }

  .footer-top { padding-bottom: 36px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-middle { padding: 26px 0; }
}

@media (max-width: 480px) {
  .hero-stats { grid-template-columns: 1fr; text-align: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .card-features { grid-template-columns: 1fr; }
  .float-card { display: none; }
}

/* ======================================================
   V2 新增模块样式（参考正泰官网风格）
   ====================================================== */

/* ============ Banner 轮播 ============ */
.banner {
  position: relative;
  margin-top: 80px;
}

.banner-slider {
  position: relative;
  width: 100%;
  height: 560px;
  overflow: hidden;
  /* 高度由 main.js 按 Banner 图片真实比例设置，保证图片完整显示且不留上下白块 */
  transition: height 0.5s ease;
}

.banner-slide {
  position: absolute;
  inset: 0;
  /* 图片完整展示：contain 不裁切，留白处用浅色底 */
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  background-color: #f2f4f8;
  opacity: 0;
  transition: opacity 0.9s ease;
  display: flex;
  align-items: center;
}

.banner-slide.active {
  opacity: 1;
  z-index: 2;
}

/* 首页 Banner 文字内容块（container banner-inner）：按需求整体隐藏 */
.banner-inner {
  display: none;
  max-width: 760px;
  color: #fff;
  padding: 0 24px;
}

.banner-tag {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(179, 1, 1, 0.2);
  border: 1px solid rgba(255, 140, 140, 0.4);
  color: #ffd0d0;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 24px;
  backdrop-filter: blur(6px);
}

.banner-title {
  font-size: 52px;
  line-height: 1.2;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.banner-title span {
  background: linear-gradient(90deg, #ffd6d6, #ff7a7a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.banner-sub {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.78);
  letter-spacing: 2.5px;
  margin-bottom: 38px;
  font-weight: 500;
}

.banner-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.banner-arrow {
  position: absolute;
  top: 50%; /* 外框高度随图片比例变化，箭头改为垂直居中 */
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 32px;
  line-height: 1;
  font-weight: 300;
  z-index: 10;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.banner-arrow:hover {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 8px 22px rgba(179, 1, 1, 0.4);
}

.banner-arrow.prev { left: 28px; }
.banner-arrow.next { right: 28px; }

.banner-dots {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.banner-dots .dot {
  width: 36px;
  height: 4px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.35);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: var(--transition);
}

.banner-dots .dot.active {
  background: #fff;
  width: 52px;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.5);
}

/* Banner 下方 8 个分类快捷入口 */
.banner-cats {
  background: #fff;
  position: relative;
  z-index: 5;
}

.banner-cats-list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
}

.banner-cats-list li a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 22px 12px;
  color: var(--text-dark);
  font-size: 15px;
  font-weight: 500;
  border-right: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}

.banner-cats-list li .cat-ico {
  font-size: 36px;
  line-height: 1;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}

/* 上传的图片图标：统一高度，宽度按比例自适应（宽图有上限，避免撑破格子） */
.banner-cats-list li .cat-ico img {
  height: 36px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  display: block;
}

.banner-cats-list li .cat-txt {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--text-dark);
}

.banner-cats-list li a:hover {
  background: var(--bg-light);
}

.banner-cats-list li a:hover .cat-ico {
  transform: translateY(-4px) scale(1.1);
}

.banner-cats-list li a:hover .cat-txt {
  color: var(--accent);
}

/* ============ 认证（新品推荐风格 横向滑动） ============ */
.new-slider {
  position: relative;
}

.new-slider-track {
  display: flex;
  gap: 28px;
  overflow-x: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
  padding: 16px 4px 28px;
  scroll-snap-type: x mandatory;
}

.new-slider-track::-webkit-scrollbar { display: none; }

.new-card {
  flex: 0 0 calc(33.333% - 19px);
  min-width: 0;
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
}

.new-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.new-card-img {
  position: relative;
  height: 260px;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.new-card-img::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.15) 100%);
  transition: transform 0.6s ease;
}

.new-card:hover .new-card-img { background-size: 108% auto; }

.new-card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--primary);
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
  letter-spacing: 0.5px;
  z-index: 2;
}

.new-card-caption {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 20px;
  color: #fff;
  z-index: 2;
}

.new-card-caption h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.new-card-caption p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.6;
}

.new-card-foot {
  padding: 20px 22px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.new-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

.new-card-tags span {
  padding: 4px 10px;
  background: var(--bg-light);
  color: var(--text-gray);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 13px;
}

.new-arrow {
  position: absolute;
  top: 45%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 26px;
  line-height: 1;
  font-weight: 300;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  z-index: 5;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.new-arrow:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-50%) scale(1.08);
}

.new-arrow.prev { left: -20px; }
.new-arrow.next { right: -20px; }

/* ============ 检测能力（产品中心风格 卡片网格） ============ */
.section-more {
  text-align: center;
  margin-top: 50px;
}

.btn-border {
  border: 1.5px solid var(--primary);
  color: var(--primary);
  background: transparent;
}

.btn-border:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.product-img {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--bg-light);
}

.product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s ease;
}

.product-card:hover .product-img img {
  transform: scale(1.08);
}

.product-info {
  padding: 22px 22px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-info h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.product-info p {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.7;
  margin-bottom: 18px;
  flex: 1;
}

.product-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
}

.product-link {
  font-size: 13px;
  color: var(--text-gray);
  transition: var(--transition);
}

.product-link:hover {
  color: var(--primary);
}

.product-buy {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  background: var(--accent);
  color: #fff !important;
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 600;
  box-shadow: 0 3px 10px rgba(179, 1, 1, 0.25);
  transition: var(--transition);
}

.product-buy:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 5px 14px rgba(179, 1, 1, 0.35);
}

/* ============ 品牌影像（视频中心风格） ============ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.video-card {
  display: block;
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.video-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.video-card:hover .video-thumb img {
  transform: scale(1.08);
}

.video-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 41, 120, 0.18);
  transition: var(--transition);
}

.video-card:hover .video-play {
  background: rgba(179, 1, 1, 0.3);
}

.play-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.96);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  padding-left: 6px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  transition: var(--transition);
}

.video-card:hover .play-icon {
  background: #fff;
  transform: scale(1.12);
  color: var(--accent);
}

.video-duration {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 4px 10px;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  z-index: 3;
}

.video-info {
  padding: 20px 22px 24px;
}

.video-info h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.5;
  margin-bottom: 10px;
  transition: var(--transition);
}

.video-card:hover .video-info h4 {
  color: var(--primary);
}

.video-info p {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.6;
}

/* ============ 解决方案（仿参考站：智慧生活解决方案 风格） ============ */
.solution-section {
  background: #f5f6fa;
  padding: 72px 0 88px;
}

.solution-head {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 44px;
}

.solution-bar {
  display: inline-block;
  width: 4px;
  height: 36px;
  background: var(--accent);
  border-radius: 2px;
}

.solution-title {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: 4px;
  margin: 0;
}

.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.solution-card {
  position: relative;
  display: block;
  height: 440px;
  border-radius: 12px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  text-decoration: none;
  transition: transform 0.5s ease, box-shadow 0.5s ease;
  box-shadow: 0 4px 16px rgba(0, 41, 120, 0.12);
}

.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(0, 41, 120, 0.25);
}

.solution-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.08) 40%, rgba(0, 0, 0, 0.72) 100%);
  transition: background 0.5s ease;
}

.solution-card:hover .solution-mask {
  background: linear-gradient(180deg, rgba(0, 41, 120, 0.15) 30%, rgba(0, 41, 120, 0.85) 100%);
}

.solution-body {
  position: absolute;
  left: 32px;
  right: 32px;
  bottom: 32px;
  color: #fff;
  z-index: 2;
}

.solution-card-title {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: 1px;
  color: #fff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  transition: color 0.3s ease;
}

.solution-card-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
  margin: 0 0 20px;
  line-height: 1.6;
  max-width: 90%;
}

.solution-btn {
  display: inline-block;
  padding: 10px 26px;
  border: 1.5px solid var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 6px;
  background: transparent;
  transition: var(--transition);
  letter-spacing: 1px;
}

.solution-card:hover .solution-btn {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 4px 14px rgba(179, 1, 1, 0.4);
}

/* 左右两大卡可自定义大小差异（参考站左大右小也可等大，这里等大更好看） */
.solution-card-lg,
.solution-card-sm {
  height: 440px;
}

/* ============ V2 响应式适配 ============ */
@media (max-width: 1200px) {
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .new-card { flex: 0 0 calc(50% - 14px); }
  .banner-cats-list { grid-template-columns: repeat(6, 1fr); }
}

@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .banner-slider { height: 480px; }
  .banner-title { font-size: 40px; }
  .banner-arrow { width: 44px; height: 44px; font-size: 26px; }
  .banner-arrow.prev { left: 14px; }
  .banner-arrow.next { right: 14px; }
  .new-arrow.prev { left: -4px; }
  .new-arrow.next { right: -4px; }
}

@media (max-width: 768px) {
  .banner { margin-top: 68px; }
  .banner-slider { height: 420px; }
  .banner-title { font-size: 30px; }
  .banner-sub { font-size: 13px; margin-bottom: 28px; }
  .banner-arrow { width: 40px; height: 40px; font-size: 22px; }
  .banner-arrow.prev { left: 10px; }
  .banner-arrow.next { right: 10px; }
  .banner-dots .dot { width: 24px; }
  .banner-dots .dot.active { width: 40px; }

  .banner-cats-list { grid-template-columns: repeat(3, 1fr); }
  .banner-cats-list li a { padding: 14px 6px; font-size: 13px; gap: 6px; }
  .banner-cats-list li .cat-ico { font-size: 28px; height: 28px; }
  .banner-cats-list li .cat-ico img { height: 28px; width: auto; max-width: 96px; }
  .banner-cats-list li .cat-txt { font-size: 13px; }
  .banner-cats-list li:nth-child(3n) a { border-right: none; }

  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .video-grid { grid-template-columns: 1fr; gap: 20px; }

  .new-card { flex: 0 0 86%; }
  .new-arrow { display: none; }

  .new-card-img { height: 220px; }
  .new-card-foot { padding: 16px; }

  .solution-section { padding: 56px 0 64px; }
  .solution-title { font-size: 26px; letter-spacing: 2px; }
  .solution-bar { height: 28px; }
  .solution-grid { grid-template-columns: 1fr; gap: 18px; }
  .solution-card,
  .solution-card-lg,
  .solution-card-sm { height: 260px; }
  .solution-body { left: 22px; right: 22px; bottom: 22px; }
  .solution-card-title { font-size: 20px; margin-bottom: 8px; }
  .solution-card-desc { font-size: 13px; margin-bottom: 14px; }
  .solution-btn { padding: 8px 20px; font-size: 13px; }
}

@media (max-width: 480px) {
  .banner-slider { height: 380px; }
  .banner-title { font-size: 24px; }
  .banner-tag { font-size: 11px; padding: 6px 14px; margin-bottom: 16px; }
  .banner-btns .btn { padding: 10px 18px; font-size: 13px; }

  .banner-cats-list { grid-template-columns: repeat(2, 1fr); }
  .banner-cats-list li:nth-child(2n) a { border-right: none; }

  .product-grid { grid-template-columns: 1fr; }
  .new-card { flex: 0 0 92%; }

  .play-icon { width: 52px; height: 52px; font-size: 18px; }
}