/* =============================================
   宇浩智联 - 官网样式
   统一 #4632CD 蓝色系 · 大图轮播 · 科技营销
   ============================================= */

:root {
  --primary: #4632CD;
  --primary-dark: #3527a3;
  --primary-deeper: #261d7a;
  --primary-deep: #1a1458;
  --primary-light: #6e5de8;
  --primary-lighter: #988cf2;
  --primary-soft: rgba(70, 50, 205, 0.08);
  --primary-glow: rgba(70, 50, 205, 0.25);
  --accent: #00d4e8;
  --accent-soft: rgba(0, 212, 232, 0.12);
  --white: #ffffff;
  --gray-50: #f4f3fc;
  --gray-100: #eae8f9;
  --gray-200: #d4d1f0;
  --gray-500: #8b87b0;
  --gray-700: #4b4780;
  --gray-900: #1c1850;
  --font: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow: 0 4px 24px rgba(70, 50, 205, 0.08);
  --shadow-lg: 0 16px 48px rgba(70, 50, 205, 0.14);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
html { scroll-behavior: smooth; scroll-padding-top: 45vh; }
body {
  font-family: var(--font);
  background-color: var(--primary-deep);
  background-image: url('../image/bg.jpg');
  background-size: cover;
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
.container { width: min(1300px, calc(100% - 100px)); margin: 0 auto; }
.section { padding: 60px 0; }

/* 白色区块 */
.section-white {
  background: var(--white);
  color: var(--gray-900);
}
.section-white .section-label { color: var(--primary); }
.section-white .section-desc { color: var(--gray-500); }
.section-white h2 { color: var(--gray-900); }
.section-white h3 { color: var(--gray-900); }
.section-white p { color: var(--gray-500); }

/* 浅蓝区块 */
.section-gray {
  background: var(--gray-50);
  color: var(--gray-900);
}
.section-gray .section-label { color: var(--primary); }
.section-gray .section-desc { color: var(--gray-500); }
.section-gray h2 { color: var(--gray-900); }
.section-gray h3 { color: var(--gray-900); }
.section-gray p { color: var(--gray-500); }

/* 主色深蓝区块 */
.section-dark {
  background: var(--primary-deeper);
  color: var(--white);
}
.section-dark .section-label { color: var(--accent); }
.section-dark .section-desc { color: rgba(255,255,255,0.6); }
.section-dark h2 { color: var(--white); }
.section-dark h3 { color: var(--white); }

/* --- 导航 --- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(70, 50, 205, 0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  transition: var(--transition);
}
.header.scrolled {
  background: rgba(53, 39, 163, 0.97);
  box-shadow: 0 4px 30px rgba(0,0,0,0.15);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.logo img { width: 60px; height: 60px; object-fit: contain; border-radius: 8px; }
.logo-text strong { display: block; font-size: 1rem; color: #fff; }
.logo-text span { display: block; font-size: 0.72rem; color: rgba(255,255,255,0.6); font-weight: 400; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.75);
  transition: var(--transition);
  font-weight: 500;
}
.nav a:hover,
.nav a.active {
  color: #fff;
  background: rgba(255,255,255,0.15);
}
.menu-btn { display: none; width: 38px; height: 38px; flex-direction: column; justify-content: center; gap: 5px; }
.menu-btn span { display: block; height: 2.5px; background: #fff; border-radius: 10px; transition: var(--transition); }
.menu-btn.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-btn.open span:nth-child(2) { opacity: 0; }
.menu-btn.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- 轮播 --- */
.hero-slider {
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  z-index: 1;
  height: calc(45vh - 68px);
  min-height: 200px;
  overflow: hidden;
  background: var(--primary-deeper);
}

.hero-slider + .section {
  margin-top: calc(43vh + 10px);
  padding-top: 24px;
  padding-bottom: 24px;
}

@media (max-width: 980px) {
  .hero-slider + .section {
    margin-top: 268px;
  }
}

@media (max-width: 720px) {
  .hero-slider + .section {
    margin-top: 268px;
  }
}
.slider-wrapper { width: 100%; height: 100%;   position: relative; }
.slide {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr;
  place-items: center;
  gap: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
  pointer-events: none;
}
.slide.active { opacity: 1; pointer-events: auto; }

.slide-img {
  width: calc(100%);
  height: calc(100%-80px);
margin-top: -10px;
  object-fit: contain;

  background: var(--primary-deeper);
}

/* 右侧文字区 */
.slide-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px 48px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-deeper));
}
.slide-tag {
  display: inline-block;
  width: fit-content;
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  border: 1px solid rgba(0, 212, 232, 0.3);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.slide-text h1 {
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  line-height: 1.22;
  margin-bottom: 14px;
  font-weight: 800;
}
.slide-text > p {
  font-size: 0.93rem;
  line-height: 1.7;
  opacity: 0.7;
  margin-bottom: 20px;
  max-width: 440px;
}
.slide-btns { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 26px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--accent);
  color: var(--primary-deeper);
  font-weight: 700;
}
.btn-primary:hover {
  background: #00e0f5;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 212, 232, 0.4);
}
.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.35);
  color: #fff;
  background: transparent;
}
.btn-outline:hover {
  border-color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.06);
}

.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  z-index: 10;
}
.slider-arrow:hover { background: rgba(255,255,255,0.25); }
.slider-arrow.prev { left: 8px; }
.slider-arrow.next { right: 8px; }

.slider-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 10;
}
.slider-dots span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: var(--transition);
}
.slider-dots span.active { background: var(--accent); transform: scale(1.5); box-shadow: 0 0 6px rgba(0,212,232,0.5); }

.slider-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}
.slider-scroll span {
  display: block;
  width: 22px; height: 34px;
  border: 2px solid rgba(255,255,255,0.35);
  border-radius: 20px;
  position: relative;
}
.slider-scroll span::after {
  content: '';
  position: absolute;
  top: 5px; left: 50%;
  transform: translateX(-50%);
  width: 3px; height: 7px;
  background: #fff;
  border-radius: 10px;
  animation: scrollDot 2s ease-in-out infinite;
}
@keyframes scrollDot {
  0%, 100% { top: 5px; opacity: 0.4; }
  50% { top: 15px; opacity: 1; }
}

/* --- 通用标题 --- */
.section-head { text-align: center; max-width: 100%; margin: 0 auto 56px; }
.section-intro {
  display: grid;
  grid-template-columns: 3fr 7fr;
  gap: 20px;
  align-items: center;
  text-align: left;
  margin-top: 20px;
}
.section-intro-img img {
  width: 100%;
  max-width: 480px;
  object-fit: contain;
  margin: 0 auto;
}

@media (max-width: 720px) {
  .section-intro { grid-template-columns: 1fr; text-align: center; }
  .section-intro-img img { max-width: 120px; }
}
.section-label {
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  font-weight: 700;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.section-head.light .section-label { color: var(--accent); }
.section-head h2 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  margin-bottom: 14px;
  font-weight: 800;
}
.section-desc { font-size: 1.02rem; }

/* --- 关于我们 --- */
.about-grid {
  display: grid;
  grid-template-columns: 0.45fr 1.55fr;
  gap: 30px;
  align-items: start;
}
.about-images {
  position: sticky;
  top: 100px;
}
.about-img-main {
  position: relative;
  height: 320px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  padding: 10px;
  background: var(--white);
}
.about-slide-img {
  position: absolute;
  inset: 10px;
  width: calc(100% - 20px);
  height: calc(100% - 20px);
  object-fit: contain;
  border-radius: calc(var(--radius-lg) - 4px);
  opacity: 0;
  transition: opacity 0.8s ease;
}
.about-slide-img.active {
  opacity: 1;
  position: relative;
  inset: auto;
}

.about-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 10px;
}
.about-dots span {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gray-200);
  cursor: pointer;
  transition: var(--transition);
}
.about-dots span.active {
  background: var(--primary);
  transform: scale(1.3);
}
.about-img-badge {
  position: absolute;
  bottom: 24px; right: -16px;
  background: var(--white);
  border-radius: var(--radius);
  padding: 16px 24px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  border: 2px solid var(--primary-soft);
}
.about-img-badge strong {
  display: block;
  font-size: 2rem;
  color: var(--primary);
  line-height: 1;
}
.about-img-badge span { font-size: 0.8rem; color: var(--gray-500); }

.about-text .section-label { margin-bottom: 8px; }
.about-text h3 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin-bottom: 8px;
  font-weight: 800;
  color: var(--gray-900);
}
.about-subtitle {
  font-size: 0.95rem;
  color: var(--primary);
  margin-bottom: 12px;
  font-weight: 600;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-soft);
}
.about-text > p {
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 10px;
  font-size: 0.9rem;
}
.about-text > p strong {
  color: var(--gray-900);
  font-size: 0.98rem;
}

.about-points {
  display: grid;
  gap: 6px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--gray-100);
}
.about-point {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius);
  transition: var(--transition);
  border-left: 3px solid transparent;
}
.about-point:hover {
  background: var(--gray-50);
  border-left-color: var(--primary);
}
.point-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--primary);
}
.point-icon svg { width: 20px; height: 20px; }
.about-point strong { display: block; font-size: 0.95rem; margin-bottom: 2px; color: var(--gray-900); }
.about-point span { font-size: 0.85rem; color: var(--gray-500); }

/* --- 产品展示（子页面） --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.product-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.product-img { height: 240px; overflow: hidden; }
.product-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.product-card:hover .product-img img { transform: scale(1.05); }
.product-info { padding: 22px; }
.product-info h3 { font-size: 1.1rem; margin-bottom: 8px; font-weight: 700; color: var(--gray-900); }
.product-info p { color: var(--gray-500); line-height: 1.7; font-size: 0.92rem; }

/* --- 解决方案 --- */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.solution-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.solution-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}
.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.solution-card:hover::before { opacity: 1; }
.sc-icon { margin-bottom: 22px; }
.sc-icon svg { width: 52px; height: 52px; }
.solution-card h3 { font-size: 1.2rem; margin-bottom: 10px; font-weight: 700; color: var(--gray-900); }
.solution-card p { color: var(--gray-500); line-height: 1.72; font-size: 0.93rem; }

/* --- 服务详情 --- */
.service-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  margin-bottom: 24px;
}
.service-card:last-child { margin-bottom: 0; }
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.svc-img {
  height: 100%;
  min-height: 220px;
  overflow: hidden;
  position: relative;
}
.svc-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(70,50,205,0.08));
}
.svc-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.service-card:hover .svc-img img { transform: scale(1.05); }
.svc-icon {
  margin-bottom: 12px;
}
.svc-icon img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}
.svc-text {
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.svc-text h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  font-weight: 700;
  color: var(--gray-900);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-soft);
}
.svc-text p {
  color: var(--gray-500);
  line-height: 1.78;
  font-size: 0.92rem;
}

.card-wide {
  grid-template-columns: 3fr 1fr;
}
@media (max-width: 720px) {
  .service-card, .card-wide { grid-template-columns: 1fr; }
  .svc-img { height: 200px; min-height: auto; }
}

/* --- 核心优势 --- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-bottom: 64px;
}
.adv-card {
  background: var(--primary-deep);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
}
.adv-card:hover {
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.2);
}
.adv-num {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--primary-lighter);
  opacity: 0.8;
  display: block;
  line-height: 1;
  margin-bottom: 16px;
}
.adv-card h3 { font-size: 1.15rem; margin-bottom: 10px; font-weight: 700; }
.adv-card p { color: rgba(255,255,255,0.55); line-height: 1.7; font-size: 0.92rem; }

/* --- 数据统计 --- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  text-align: center;
  padding-top: 56px;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.stat strong {
  display: block;
  font-size: 3rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 6px;
}
.stat strong span { color: var(--accent); }
.stat > span { color: rgba(255,255,255,0.5); font-size: 0.9rem; }

/* --- 成功案例 --- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}
.case-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.case-img { height: 220px; overflow: hidden; }
.case-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.case-card:hover .case-img img { transform: scale(1.05); }
.case-info { padding: 24px; }
.case-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 10px;
  font-weight: 600;
}
.case-info h3 { font-size: 1.12rem; margin-bottom: 8px; font-weight: 700; color: var(--gray-900); }
.case-info p { color: var(--gray-500); line-height: 1.7; font-size: 0.92rem; }

/* --- 合作伙伴 --- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}
.partner {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.partner:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.partner-icon { color: var(--primary); font-size: 1.3rem; }
.partner strong { font-size: 0.95rem; color: var(--gray-900); }

/* --- 新闻 --- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.news-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}
.news-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.news-date {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 12px;
}
.news-card h3 { font-size: 1.1rem; margin-bottom: 8px; font-weight: 700; line-height: 1.4; color: var(--gray-900); }
.news-card p { color: var(--gray-500); line-height: 1.7; font-size: 0.93rem; }

/* --- 联系我们 --- */
.contact-section { padding: 100px 0; }
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr;
  gap: 64px;
  align-items: center;
}
.contact-left .section-label { margin-bottom: 12px; }
.contact-left h2 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  line-height: 1.15;
  margin-bottom: 18px;
  font-weight: 800;
}
.contact-left > p {
  color: rgba(255,255,255,0.55);
  line-height: 1.8;
  margin-bottom: 28px;
}
.contact-items { display: grid; gap: 12px; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--primary-deep);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 16px 20px;
  transition: var(--transition);
}
.contact-item:hover { border-color: rgba(255,255,255,0.2); }
.contact-item svg { color: var(--accent); flex-shrink: 0; }
.contact-item strong { display: block; font-size: 0.8rem; color: rgba(255,255,255,0.45); margin-bottom: 2px; }
.contact-item span { font-weight: 500; }
.contact-qr {
  text-align: center;
  background: var(--primary-deep);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
}
.contact-qr img {
  width: min(220px, 100%);
  margin: 0 auto 16px;
  border-radius: var(--radius);
}
.contact-qr p { color: rgba(255,255,255,0.5); font-size: 0.9rem; }

/* --- 页脚 --- */
.footer {
  background: var(--primary-dark);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-left { display: flex; align-items: center; gap: 24px; }
.footer-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; color: #fff; }
.footer-left p { color: rgba(255,255,255,0.55); font-size: 0.84rem; }
.footer-legal { display: flex; flex-direction: column; gap: 4px; }
.footer-legal a { color: rgba(255,255,255,0.55); transition: var(--transition); }
.footer-legal a:hover { color: #fff; }
.footer-nav { display: flex; gap: 24px; }
.footer-nav a { color: rgba(255,255,255,0.6); font-size: 0.88rem; transition: var(--transition); }
.footer-nav a:hover { color: #fff; }

/* --- 响应式 --- */
@media (max-width: 980px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .slide { grid-template-columns: 1fr; }
  .slide-text { padding: 28px; }
  .hero-slider { height: 200px; min-height: auto; }
  .about-img-badge { right: 16px; bottom: 16px; }
  .footer-inner { flex-direction: column; text-align: center; }
}

/* 导航的窄屏切换断点。
   8 个菜单项内联排开需要约 915px 内容宽度（logo 208 + 导航 706），
   而 .container 宽度是 (视口 - 100px)，因此视口低于 1080px 时
   内联会挤压成竖排文字，必须改用汉堡菜单。
   注意：这个断点比上面的 980px 更宽，是刻意为之。 */
@media (max-width: 1080px) {
  /* 菜单展开时遮罩 z-index 为 99，会盖住头部导致汉堡按钮点不到。
     按钮本身设计为展开后变成 ✕（见 .menu-btn.open），所以必须抬到遮罩之上。 */
  .menu-btn { display: flex; position: relative; z-index: 101; }
  .logo { position: relative; z-index: 101; }
  .nav {
    /* 重要：祖先 .header 带 filter / backdrop-filter，会为 fixed 后代
       创建新的包含块，导致 position:fixed 相对 .header 定位而不是视口。
       所以这里不能用 inset:0 —— 那样高度只有 .header 的 68px，
       菜单会溢出到屏幕外。必须显式用 top/left/right + 100vh 才能铺满。 */
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 100vh;
    overflow-y: auto;
    background: rgba(53, 39, 163, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
  }
  .nav.open { opacity: 1; visibility: visible; }
  .nav a { font-size: 1.05rem; padding: 12px 20px; }
}

@media (max-width: 720px) {
  .container { width: min(100%, calc(100% -20px)); }
  .section { padding: 30px 0; }

  .slide { grid-template-columns: 1fr; }
  .slide-text { padding: 20px; }
  .hero-slider { height: 200px; min-height: auto; }
  .slide-text h1 { font-size: 1.6rem; }
  .slider-arrow { width: 36px; height: 36px; font-size: 1rem; }
  .slider-arrow.prev { left: 10px; }
  .slider-arrow.next { right: 10px; }
  .slider-dots { bottom: 80px; }
  .section-head { text-align: left; margin-bottom: 36px; }
  .section-head h2 { font-size: 1.6rem; }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stat strong { font-size: 2.2rem; }
  .cases-grid, .news-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
  .btn { width: 100%; justify-content: center; }
  .slide-btns { flex-direction: column; }
  .footer-left { flex-direction: column; gap: 8px; }
  .footer-nav { flex-wrap: wrap; justify-content: center; gap: 14px; }
}

@media (max-width: 480px) {
  .slide-text h1 { font-size: 1.4rem; }
  .stats-row { gap: 16px; }
}

/* =============================================
   全页背景图（白底）· 内容模块全透明 · 深色文字
   ============================================= */
.section-white, .section-gray, .section-dark {
  background: transparent;
  color: #111;
}
.section-white h2, .section-gray h2, .section-dark h2,
.section-white h3, .section-gray h3, .section-dark h3 {
  color: #111;
}
.section-white p, .section-gray p, .section-dark p {
  color: #444;
}
.section-white .section-label, .section-gray .section-label, .section-dark .section-label,
.section-head.light .section-label {
  color: var(--primary);
}
.section-white .section-desc, .section-gray .section-desc, .section-dark .section-desc {
  color: #555;
}

/* 卡片统一全透明 + 深色文字 */
.product-card, .solution-card, .service-card, .case-card, .partner, .news-card,
.adv-card, .contact-item, .contact-qr {
  background: transparent;
  border: 1px solid rgba(0, 0, 0, 0.12);
}
.product-info h3, .solution-card h3, .service-card .svc-text h3,
.case-info h3, .partner strong, .news-card h3, .adv-card h3 {
  color: #111;
}
.product-info p, .solution-card p, .service-card .svc-text p,
.case-info p, .news-card p, .adv-card p {
  color: #444;
}
.service-card .svc-text h3 {
  border-bottom-color: rgba(0, 0, 0, 0.12);
}
.adv-num { color: var(--primary); opacity: 0.9; }

/* 数据统计 */
.stat strong { color: #111; }
.stat strong span { color: var(--primary); }
.stat > span { color: #555; }

/* 关于我们 */
.about-img-main { background: transparent; box-shadow: none; }
.about-img-badge { background: transparent; border-color: rgba(0, 0, 0, 0.12); box-shadow: none; }
.about-img-badge strong { color: var(--primary); }
.about-img-badge span { color: #666; }
.about-text h3 { color: #111; }
.about-subtitle { color: var(--primary); border-bottom-color: rgba(0, 0, 0, 0.12); }
.about-text > p { color: #444; }
.about-text > p strong { color: #111; }
.about-point strong { color: #111; }
.about-point span { color: #666; }
.about-point:hover { background: transparent; }
.about-dots span { background: rgba(0, 0, 0, 0.25); }
.about-dots span.active { background: var(--primary); }

/* 案例标签 */
.case-tag { color: var(--primary); background: var(--primary-soft); }

/* 联系我们（深色区块转浅底深字） */
.contact-left > p { color: #555; }
.contact-item svg { color: var(--primary); }
.contact-item strong { color: #777; }
.contact-item span { color: #111; }
.contact-qr p { color: #666; }

/* --- 常见问题 FAQ --- */
.faq-list {
  display: grid;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}
.faq-item {
  background: transparent;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
}
.faq-item h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #111;
  margin-bottom: 8px;
}
.faq-item p {
  color: #444;
  font-size: 0.95rem;
  line-height: 1.7;
}