/* ============================================
   陕西瑞泉水处理 - 汉中站 样式
   设计风格：简约大气、行业专业
   主色：深海蓝 #0A4D7A
   强调：活力橙 #F59E0B
   ============================================ */

/* ---------- 基础重置 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #0A4D7A;
  --color-primary-dark: #053a5c;
  --color-primary-light: #1565a0;
  --color-accent: #F59E0B;
  --color-accent-dark: #d97706;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f9fc;
  --color-bg-soft: #e8f4fa;
  --color-text: #1a2a3a;
  --color-text-light: #4a5568;
  --color-text-muted: #6b7785;
  --color-border: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(10, 77, 122, 0.04);
  --shadow-md: 0 4px 12px rgba(10, 77, 122, 0.08);
  --shadow-lg: 0 10px 30px rgba(10, 77, 122, 0.12);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1280px;
  --header-h: 110px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-accent);
}

ul, ol {
  list-style: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 15px;
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(245, 158, 11, 0.4);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(4px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
}

.header-top {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  padding: 6px 0;
}

.header-top-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.header-top-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-top-links {
  display: flex;
  gap: 16px;
}

.header-top-links a {
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
}

.header-top-links a:hover {
  color: #fff;
}

.nav-wrap {
  background: #fff;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  font-weight: 700;
  text-decoration: none;
  color: var(--color-primary);
  white-space: nowrap;
  flex-shrink: 0;
}

.logo-main {
  font-size: 24px;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--color-primary);
}

.logo-divider {
  font-size: 24px;
  font-weight: 300;
  color: var(--color-text-muted);
  margin: 0 12px;
}

.logo-sub {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.3px;
}

.main-nav {
  flex: 1;
}

.main-nav ul {
  display: flex;
  justify-content: flex-end;
  gap: 4px;
  flex-wrap: wrap;
}

.main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 6px;
  transition: all var(--transition);
}

.main-nav a:hover {
  color: var(--color-primary);
  background: var(--color-bg-soft);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  width: 40px;
  height: 40px;
  justify-content: center;
  align-items: center;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

.menu-toggle.is-open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- Banner ---------- */
.banner {
  position: relative;
  margin-top: var(--header-h);
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}

.banner-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, #0A4D7A 0%, #1565a0 50%, #1e88c7 100%);
  z-index: -2;
}

.banner-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(245, 158, 11, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(30, 136, 199, 0.6) 0%, transparent 60%);
}

.banner-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.4;
}

.banner-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 0%, rgba(5, 58, 92, 0.4) 100%);
  z-index: -1;
}

.banner-inner {
  position: relative;
  padding: 80px 24px 100px;
  z-index: 1;
}

.banner-content {
  max-width: 900px;
  color: #fff;
  animation: fadeUp 0.8s ease-out;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.banner-eyebrow {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(245, 158, 11, 0.2);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fcd9a3;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.banner-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 16px;
  letter-spacing: -1px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.banner-subtitle {
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 24px;
  color: rgba(255, 255, 255, 0.95);
}

.banner-desc {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  max-width: 760px;
  margin-bottom: 36px;
}

.banner-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.banner-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.banner-tags li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.95);
}

.banner-tags li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: bold;
}

.banner-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 50px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 15px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
  z-index: 2;
  animation: bounceDown 2s ease-in-out infinite;
}

.banner-scroll span {
  width: 3px;
  height: 8px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 2px;
}

@keyframes bounceDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---------- 通用 section ---------- */
.section {
  padding: 80px 0;
}

.section:nth-of-type(even) {
  background: var(--color-bg-alt);
}

.section-head {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 56px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 12px;
}

.section-sub {
  font-size: 16px;
  color: var(--color-text-muted);
}

/* ---------- 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 56px;
  align-items: start;
}

.about-text p {
  margin-bottom: 16px;
  color: var(--color-text-light);
  font-size: 15px;
}

.about-text strong {
  color: var(--color-primary);
  font-weight: 600;
}

.about-list {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.about-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text-light);
  font-size: 14.5px;
}

.about-list .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.about-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  transition: all var(--transition);
}

.about-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.about-card-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
  line-height: 1;
}

.about-card-num small {
  font-size: 16px;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-left: 4px;
}

.about-card-label {
  font-size: 14px;
  color: var(--color-text-light);
}

/* ---------- 优势 ---------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.adv-item {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.adv-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.4s ease;
}

.adv-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.adv-item:hover::before {
  transform: scaleY(1);
}

.adv-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-soft);
  color: var(--color-primary);
  border-radius: 12px;
  margin-bottom: 20px;
}

.adv-icon svg {
  width: 32px;
  height: 32px;
}

.adv-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.adv-item p {
  color: var(--color-text-light);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 产品中心 ---------- */
.prod-tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.prod-tab {
  padding: 12px 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition);
}

.prod-tab:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.prod-tab.is-active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(10, 77, 122, 0.25);
}

.prod-panel {
  display: none;
  animation: fadePanel 0.4s ease;
}

.prod-panel.is-active {
  display: block;
}

@keyframes fadePanel {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.prod-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.prod-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.prod-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.prod-img-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-bg-soft);
  position: relative;
}

.prod-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.prod-img-wrap::after {
  content: "🔍";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.prod-card:hover .prod-img-wrap::after {
  opacity: 1;
}

.prod-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  padding: 16px 16px 8px;
  line-height: 1.4;
  min-height: 56px;
}

.prod-card p {
  font-size: 13.5px;
  color: var(--color-text-light);
  line-height: 1.65;
  padding: 0 16px 16px;
  flex: 1;
}

/* ---------- 服务流程 ---------- */
.flow-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}

.flow-item {
  background: #fff;
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
  position: relative;
  transition: all var(--transition);
}

.flow-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.flow-num {
  display: inline-block;
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary);
  background: var(--color-bg-soft);
  width: 64px;
  height: 64px;
  line-height: 64px;
  border-radius: 50%;
  margin-bottom: 16px;
  font-family: Georgia, serif;
}

.flow-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.flow-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ---------- 应用领域 ---------- */
.ind-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.ind-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
  cursor: default;
}

.ind-item:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-item[open] {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: all var(--transition);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 24px;
  font-weight: 300;
  color: var(--color-primary);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  color: var(--color-primary);
  background: var(--color-bg-soft);
}

.faq-body {
  padding: 0 24px 20px;
  color: var(--color-text-light);
  font-size: 14.5px;
  line-height: 1.8;
  animation: slideDown 0.3s ease;
}

.faq-body p {
  margin: 0;
}

.faq-body strong {
  color: var(--color-primary);
}

.faq-body a {
  color: var(--color-accent-dark);
  font-weight: 500;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 联系方式 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: start;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.contact-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px 32px;
}

.info-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.info-label {
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 1px;
}

.info-value {
  font-size: 15px;
  color: var(--color-text);
  font-weight: 500;
  word-break: break-all;
}

.info-value a {
  color: var(--color-text);
}

.info-value a:hover {
  color: var(--color-primary);
}

.info-phone a {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 18px;
}

.info-phone a:hover {
  color: var(--color-accent-dark);
}

.contact-qr {
  text-align: center;
  background: var(--color-bg-soft);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.contact-qr img {
  width: 200px;
  height: 200px;
  object-fit: contain;
  background: #fff;
  border-radius: 8px;
  padding: 8px;
  box-shadow: var(--shadow-sm);
}

.contact-qr p {
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-text-light);
  font-weight: 500;
}

/* ---------- 友情链接 ---------- */
.links {
  padding: 56px 0;
  background: #fff;
}

.links .container {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
}

.link-group h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-primary);
}

.link-group ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.link-group a {
  display: inline-block;
  padding: 6px 14px;
  background: var(--color-bg-alt);
  border-radius: 6px;
  font-size: 14px;
  color: var(--color-text-light);
  transition: all var(--transition);
}

.link-group a:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

.link-group a.current {
  background: var(--color-primary);
  color: #fff;
}

/* ---------- 底部 ---------- */
.site-footer {
  background: #0a2236;
  color: rgba(255, 255, 255, 0.7);
  padding: 32px 0;
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  text-align: center;
}

.footer-inner > * {
  margin: 0;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.85);
}

.site-footer a:hover {
  color: var(--color-accent);
}

/* ---------- Lightbox 图片放大 ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 40px;
  flex-direction: column;
}

.lightbox.is-open {
  display: flex;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.lightbox-img {
  max-width: 90%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox-caption {
  color: #fff;
  margin-top: 16px;
  font-size: 15px;
  text-align: center;
  max-width: 80%;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 300;
  transition: all var(--transition);
}

.lightbox-close:hover {
  background: var(--color-accent);
  transform: rotate(90deg);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .prod-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .adv-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .flow-list {
    grid-template-columns: repeat(2, 1fr);
  }
  .ind-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .links .container {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    padding: 32px;
    gap: 32px;
  }
  .contact-info {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }
  .header-top {
    display: none;
  }
  .nav-inner {
    height: 60px;
  }
  .logo-main, .logo-divider, .logo-sub {
    font-size: 18px;
  }
  .logo-divider {
    margin: 0 8px;
  }
  .menu-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }
  .main-nav.is-open {
    max-height: 600px;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 12px 0;
  }
  .main-nav a {
    padding: 14px 24px;
    border-radius: 0;
    border-bottom: 1px solid var(--color-border);
  }
  .banner {
    min-height: 500px;
  }
  .banner-inner {
    padding: 60px 24px 80px;
  }
  .banner-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .banner-actions .btn {
    justify-content: center;
  }
  .section {
    padding: 56px 0;
  }
  .prod-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
  .adv-grid {
    grid-template-columns: 1fr;
  }
  .flow-list {
    grid-template-columns: 1fr;
  }
  .ind-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-grid {
    padding: 24px;
  }
  .about-cards {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-inner {
    flex-direction: column;
    gap: 6px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .banner-title {
    font-size: 32px;
  }
  .banner-subtitle {
    font-size: 16px;
  }
  .prod-grid {
    grid-template-columns: 1fr;
  }
  .prod-card h3 {
    min-height: auto;
  }
  .ind-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .ind-item {
    padding: 16px 8px;
    font-size: 14px;
  }
  .about-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .prod-tab {
    padding: 10px 18px;
    font-size: 14px;
  }
  .lightbox-close {
    top: 12px;
    right: 12px;
  }
}

/* ---------- 滚动行为 & 动画 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}