/* 瑞泉水处理 - 河北地区共享基础样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", "Noto Sans CJK SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: #2b2f36;
  background: #ffffff;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--rq-primary, #1a73e8); }
ul, ol { list-style: none; }
button, input, select, textarea { font: inherit; outline: none; }

:root {
  --rq-primary: #1a73e8;
  --rq-primary-dark: #1456b8;
  --rq-accent: #ff6b35;
  --rq-text: #2b2f36;
  --rq-text-soft: #5b6470;
  --rq-bg: #ffffff;
  --rq-bg-soft: #f5f8fc;
  --rq-border: #e6ebf2;
  --rq-shadow: 0 8px 28px rgba(15, 35, 75, .08);
  --rq-radius: 10px;
  --rq-radius-sm: 6px;
  --rq-container: 1240px;
  --rq-header-h: 64px;
}

/* 顶部条 */
.rq-topbar {
  background: linear-gradient(90deg, var(--rq-primary) 0%, var(--rq-primary-dark) 100%);
  color: #fff;
  font-size: 13px;
  height: 36px;
  display: flex;
  align-items: center;
}
.rq-topbar .rq-container {
  display: flex; justify-content: space-between; align-items: center; width: 100%;
}
.rq-topbar a { color: #fff; opacity: .9; }
.rq-topbar a:hover { opacity: 1; color: #fff; }
.rq-topbar-info span { margin-right: 18px; }
.rq-topbar-info i { margin-right: 4px; }

/* 导航+Banner 一体 */
.rq-header {
  position: relative;
  background: #fff;
  z-index: 50;
  border-bottom: 1px solid var(--rq-border);
}
.rq-nav {
  height: var(--rq-header-h);
  display: flex; align-items: center;
  position: sticky; top: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(160%) blur(8px);
  -webkit-backdrop-filter: saturate(160%) blur(8px);
  z-index: 60;
  border-bottom: 1px solid var(--rq-border);
}
.rq-nav .rq-container {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
}
.rq-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700;
  white-space: nowrap;
}
.rq-logo-mark {
  width: 38px; height: 38px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--rq-primary) 0%, var(--rq-primary-dark) 100%);
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-size: 18px; font-weight: 800;
  box-shadow: 0 4px 10px rgba(20, 86, 184, .25);
}
.rq-logo-text {
  display: flex; flex-direction: column; line-height: 1.15;
}
.rq-logo-name {
  font-size: 19px;
  color: var(--rq-text);
  letter-spacing: .5px;
}
.rq-logo-name b { color: var(--rq-primary); }
.rq-logo-sub {
  font-size: 12.5px;
  color: var(--rq-text-soft);
  margin-top: 2px;
  display: flex; align-items: center; gap: 6px;
}
.rq-logo-sub .rq-sep {
  color: var(--rq-primary);
  font-weight: 700;
}
.rq-logo-sub span { font-size: 12.5px; }

.rq-nav-list { display: flex; align-items: center; gap: 4px; flex-wrap: nowrap; }
.rq-nav-list > li { white-space: nowrap; }
.rq-nav-list > li > a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--rq-text);
  border-radius: 6px;
  position: relative;
  transition: all .2s ease;
  white-space: nowrap;
}
.rq-nav-list > li > a:hover,
.rq-nav-list > li > a.rq-active {
  color: var(--rq-primary);
  background: var(--rq-bg-soft);
}
.rq-nav-list > li > a.rq-active::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 4px;
  height: 2px; background: var(--rq-primary); border-radius: 2px;
}
.rq-nav-phone {
  display: flex; align-items: center; gap: 8px;
  padding-left: 18px; margin-left: 10px;
  border-left: 1px solid var(--rq-border);
  font-weight: 700; color: var(--rq-primary);
  font-size: 17px;
}

/* Banner */
.rq-banner {
  position: relative;
  height: 460px;
  background: linear-gradient(135deg, var(--rq-primary) 0%, var(--rq-primary-dark) 60%, #0c3a82 100%);
  overflow: hidden;
  color: #fff;
}
.rq-banner::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,.15), transparent 50%),
              radial-gradient(circle at 20% 80%, rgba(255,255,255,.08), transparent 50%);
  pointer-events: none;
}
.rq-banner::after {
  content: ""; position: absolute; left: -10%; bottom: -50%;
  width: 60%; height: 200%;
  background: radial-gradient(ellipse, rgba(255,255,255,.08), transparent 60%);
  pointer-events: none;
  animation: rqFloat 12s ease-in-out infinite;
}
@keyframes rqFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(40px, -20px) rotate(3deg); }
}
.rq-banner .rq-container {
  position: relative; z-index: 2; height: 100%;
  display: flex; align-items: center;
}
.rq-banner-inner { max-width: 720px; }
.rq-banner-tag {
  display: inline-block;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .3);
  color: #fff;
  padding: 6px 14px;
  font-size: 13px;
  border-radius: 30px;
  margin-bottom: 18px;
  backdrop-filter: blur(6px);
}
.rq-banner-title {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 1px;
  margin-bottom: 14px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, .18);
  animation: rqFadeUp .8s ease both;
}
.rq-banner-title small {
  display: block;
  font-size: 22px;
  font-weight: 500;
  opacity: .92;
  margin-top: 6px;
  letter-spacing: 1.5px;
}
.rq-banner-desc {
  font-size: 15.5px;
  line-height: 1.85;
  opacity: .92;
  margin-bottom: 26px;
  max-width: 640px;
  animation: rqFadeUp 1s ease .15s both;
}
.rq-banner-cta {
  display: inline-flex; align-items: center; gap: 14px;
  animation: rqFadeUp 1.2s ease .3s both;
}
.rq-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  transition: all .25s ease;
  cursor: pointer;
  border: 0;
}
.rq-btn-primary {
  background: #fff; color: var(--rq-primary);
  box-shadow: 0 8px 20px rgba(0, 0, 0, .12);
}
.rq-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(0, 0, 0, .18); color: var(--rq-primary-dark); }
.rq-btn-ghost {
  background: transparent; color: #fff;
  border: 1.5px solid rgba(255, 255, 255, .6);
}
.rq-btn-ghost:hover { background: rgba(255, 255, 255, .12); color: #fff; }

@keyframes rqFadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.rq-banner-decor {
  position: absolute; right: 6%; top: 50%; transform: translateY(-50%);
  width: 380px; height: 380px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .15);
  z-index: 1;
}
.rq-banner-decor::before,
.rq-banner-decor::after {
  content: ""; position: absolute; border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .2);
}
.rq-banner-decor::before { inset: 30px; }
.rq-banner-decor::after { inset: 70px; background: rgba(255,255,255,.05); }

.rq-banner-wave {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 60px;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 60' preserveAspectRatio='none'><path d='M0,30 C320,60 720,0 1440,30 L1440,60 L0,60 Z' fill='%23ffffff'/></svg>") no-repeat center bottom / 100% 100%;
  z-index: 1;
}

/* 通用容器 */
.rq-container {
  width: 100%;
  max-width: var(--rq-container);
  margin: 0 auto;
  padding: 0 20px;
}
.rq-section { padding: 64px 0; }
.rq-section-title {
  text-align: center;
  margin-bottom: 44px;
}
.rq-section-title small {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--rq-primary);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 8px;
}
.rq-section-title h2 {
  font-size: 30px;
  color: var(--rq-text);
  font-weight: 800;
  position: relative;
  display: inline-block;
  padding-bottom: 14px;
}
.rq-section-title h2::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 0;
  transform: translateX(-50%);
  width: 60px; height: 3px;
  background: var(--rq-primary);
  border-radius: 2px;
}
.rq-section-title p {
  color: var(--rq-text-soft);
  margin-top: 14px;
  font-size: 15px;
}

/* 关于我们 */
.rq-about {
  background: var(--rq-bg-soft);
}
.rq-about-wrap {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: center;
}
.rq-about-img {
  position: relative;
  border-radius: var(--rq-radius);
  overflow: hidden;
  box-shadow: var(--rq-shadow);
}
.rq-about-img::before {
  content: ""; position: absolute; left: -16px; top: 16px; right: 32px; bottom: -16px;
  border: 3px solid var(--rq-primary);
  border-radius: var(--rq-radius);
  z-index: 0;
}
.rq-about-img img { position: relative; z-index: 1; border-radius: var(--rq-radius); }
.rq-about-content h3 {
  font-size: 26px;
  font-weight: 800;
  color: var(--rq-text);
  margin-bottom: 10px;
}
.rq-about-content h3 span { color: var(--rq-primary); }
.rq-about-content h4 {
  font-size: 16px;
  color: var(--rq-primary);
  font-weight: 600;
  margin-bottom: 18px;
}
.rq-about-content p {
  color: var(--rq-text-soft);
  font-size: 14.5px;
  line-height: 1.85;
  margin-bottom: 12px;
}
.rq-about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 22px;
}
.rq-about-stat {
  background: #fff;
  text-align: center;
  padding: 16px 8px;
  border-radius: var(--rq-radius-sm);
  box-shadow: var(--rq-shadow);
  border-top: 3px solid var(--rq-primary);
}
.rq-about-stat b {
  display: block;
  font-size: 24px;
  color: var(--rq-primary);
  font-weight: 800;
}
.rq-about-stat span {
  display: block;
  font-size: 12.5px;
  color: var(--rq-text-soft);
  margin-top: 4px;
}

/* 产品展示 */
.rq-product-tabs {
  display: flex; flex-wrap: wrap; gap: 10px;
  justify-content: center;
  margin-bottom: 32px;
}
.rq-product-tab {
  padding: 8px 18px;
  font-size: 14px;
  background: #fff;
  border: 1px solid var(--rq-border);
  border-radius: 30px;
  cursor: pointer;
  color: var(--rq-text-soft);
  transition: all .2s ease;
}
.rq-product-tab:hover { color: var(--rq-primary); border-color: var(--rq-primary); }
.rq-product-tab.rq-active {
  background: var(--rq-primary);
  color: #fff;
  border-color: var(--rq-primary);
}
.rq-product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.rq-product-card {
  background: #fff;
  border: 1px solid var(--rq-border);
  border-radius: var(--rq-radius);
  overflow: hidden;
  transition: all .3s ease;
  cursor: pointer;
}
.rq-product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--rq-shadow);
  border-color: var(--rq-primary);
}
.rq-product-card-img {
  width: 100%; aspect-ratio: 4/3; overflow: hidden;
  background: var(--rq-bg-soft);
}
.rq-product-card-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s ease;
}
.rq-product-card:hover .rq-product-card-img img { transform: scale(1.06); }
.rq-product-card-body { padding: 14px 14px 16px; }
.rq-product-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--rq-text);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 45px;
}
.rq-product-card-desc {
  font-size: 12.5px;
  color: var(--rq-text-soft);
  line-height: 1.65;
  margin-top: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.rq-product-card-tag {
  display: inline-block;
  font-size: 11.5px;
  color: var(--rq-primary);
  background: rgba(26, 115, 232, .08);
  padding: 2px 8px;
  border-radius: 4px;
  margin-top: 10px;
}

/* 优势 */
.rq-advantages {
  background: linear-gradient(180deg, var(--rq-bg-soft) 0%, #ffffff 100%);
}
.rq-advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.rq-advantage-card {
  background: #fff;
  border-radius: var(--rq-radius);
  padding: 28px 22px;
  text-align: center;
  border: 1px solid var(--rq-border);
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.rq-advantage-card::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--rq-primary), var(--rq-primary-dark));
  transform: scaleX(0);
  transition: transform .3s ease;
}
.rq-advantage-card:hover { transform: translateY(-6px); box-shadow: var(--rq-shadow); }
.rq-advantage-card:hover::before { transform: scaleX(1); }
.rq-advantage-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--rq-primary) 0%, var(--rq-primary-dark) 100%);
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 28px;
  margin-bottom: 14px;
  box-shadow: 0 8px 16px rgba(20, 86, 184, .25);
}
.rq-advantage-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--rq-text);
  margin-bottom: 8px;
}
.rq-advantage-card p {
  font-size: 13.5px;
  color: var(--rq-text-soft);
  line-height: 1.7;
}

/* 应用领域 */
.rq-scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.rq-scenario-card {
  position: relative;
  border-radius: var(--rq-radius);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 16/10;
  background: var(--rq-bg-soft);
}
.rq-scenario-card img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s ease;
}
.rq-scenario-card:hover img { transform: scale(1.08); }
.rq-scenario-card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(0,0,0,.7) 100%);
}
.rq-scenario-card-info {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 18px;
  color: #fff;
  z-index: 1;
}
.rq-scenario-card-info h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}
.rq-scenario-card-info p {
  font-size: 12.5px;
  opacity: .9;
}

/* 设备子站 */
.rq-sites {
  background: var(--rq-bg-soft);
}
.rq-sites-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.rq-site-card {
  display: flex; align-items: center; gap: 14px;
  background: #fff;
  border: 1px solid var(--rq-border);
  border-radius: var(--rq-radius);
  padding: 18px;
  transition: all .25s ease;
}
.rq-site-card:hover {
  transform: translateX(4px);
  border-color: var(--rq-primary);
  box-shadow: var(--rq-shadow);
}
.rq-site-icon {
  width: 50px; height: 50px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--rq-primary), var(--rq-primary-dark));
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.rq-site-info { flex: 1; }
.rq-site-info h4 { font-size: 15.5px; color: var(--rq-text); margin-bottom: 2px; }
.rq-site-info p { font-size: 12.5px; color: var(--rq-text-soft); }
.rq-site-arrow { color: var(--rq-primary); font-size: 18px; }

/* FAQ */
.rq-faq-list {
  max-width: 920px;
  margin: 0 auto;
}
.rq-faq-item {
  background: #fff;
  border: 1px solid var(--rq-border);
  border-radius: var(--rq-radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all .25s ease;
}
.rq-faq-item:hover { border-color: var(--rq-primary); }
.rq-faq-q {
  padding: 16px 22px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--rq-text);
}
.rq-faq-q::before {
  content: "Q";
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--rq-primary);
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 13px;
  font-weight: 800;
  flex-shrink: 0;
}
.rq-faq-icon {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--rq-bg-soft);
  color: var(--rq-primary);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px;
  font-weight: 700;
  transition: transform .3s ease;
  flex-shrink: 0;
}
.rq-faq-item.rq-open .rq-faq-icon { transform: rotate(45deg); }
.rq-faq-a {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .3s ease;
  color: var(--rq-text-soft);
  font-size: 14px;
  line-height: 1.85;
}
.rq-faq-item.rq-open .rq-faq-a {
  max-height: 600px;
  padding: 0 22px 18px 60px;
}

/* 联系方式 */
.rq-contact {
  background: linear-gradient(135deg, var(--rq-primary) 0%, var(--rq-primary-dark) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.rq-contact::before {
  content: ""; position: absolute; inset: 0;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 80 80'><circle cx='40' cy='40' r='1' fill='%23ffffff' opacity='0.15'/></svg>") repeat;
  opacity: .5;
}
.rq-contact .rq-container { position: relative; z-index: 1; }
.rq-contact .rq-section-title small { color: #cfe0ff; }
.rq-contact .rq-section-title h2 { color: #fff; }
.rq-contact .rq-section-title h2::after { background: #fff; }
.rq-contact .rq-section-title p { color: rgba(255,255,255,.85); }
.rq-contact-wrap {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 36px;
  background: rgba(255, 255, 255, .08);
  border-radius: 14px;
  padding: 32px;
  border: 1px solid rgba(255, 255, 255, .15);
  backdrop-filter: blur(10px);
}
.rq-contact-info-list { display: grid; gap: 14px; }
.rq-contact-info-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, .06);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, .1);
}
.rq-contact-info-item i {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .18);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 16px;
  color: #fff;
  flex-shrink: 0;
}
.rq-contact-info-item h5 {
  font-size: 13px;
  color: rgba(255, 255, 255, .75);
  font-weight: 500;
  margin-bottom: 4px;
}
.rq-contact-info-item p, .rq-contact-info-item a {
  font-size: 15.5px;
  color: #fff;
  font-weight: 600;
  word-break: break-all;
}
.rq-contact-qr {
  display: flex; align-items: center; justify-content: center;
  flex-direction: column;
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  color: var(--rq-text);
  text-align: center;
}
.rq-contact-qr img {
  width: 180px; height: 180px;
  border-radius: 6px;
  border: 1px solid var(--rq-border);
}
.rq-contact-qr h5 {
  font-size: 17px;
  font-weight: 700;
  margin-top: 14px;
  color: var(--rq-text);
}
.rq-contact-qr p {
  font-size: 12.5px;
  color: var(--rq-text-soft);
  margin-top: 4px;
}

/* 城市友链 */
.rq-cities {
  background: #fff;
}
.rq-cities-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}
.rq-city-link {
  background: var(--rq-bg-soft);
  border: 1px solid var(--rq-border);
  border-radius: var(--rq-radius-sm);
  padding: 14px 8px;
  text-align: center;
  font-size: 14px;
  color: var(--rq-text);
  transition: all .2s ease;
}
.rq-city-link:hover {
  background: var(--rq-primary);
  color: #fff;
  border-color: var(--rq-primary);
  transform: translateY(-2px);
}
.rq-city-link.rq-active {
  background: var(--rq-primary);
  color: #fff;
  border-color: var(--rq-primary);
}

/* 底部 */
.rq-footer {
  background: #0c1f3f;
  color: rgba(255, 255, 255, .75);
  padding: 36px 0 18px;
  font-size: 13.5px;
}
.rq-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.rq-footer h5 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}
.rq-footer-links a {
  display: block;
  padding: 4px 0;
  color: rgba(255, 255, 255, .7);
  font-size: 13px;
}
.rq-footer-links a:hover { color: #fff; }
.rq-footer-copyright {
  text-align: center;
  padding-top: 18px;
  color: rgba(255, 255, 255, .55);
  font-size: 12.5px;
  line-height: 1.9;
}
.rq-footer-copyright a { color: rgba(255, 255, 255, .7); }
.rq-footer-copyright a:hover { color: #fff; }

/* 悬浮工具栏 */
.rq-floatbar {
  position: fixed; right: 18px; bottom: 80px;
  z-index: 80;
  display: flex; flex-direction: column; gap: 8px;
}
.rq-float-btn {
  width: 50px; height: 50px;
  border-radius: 50%;
  background: var(--rq-primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 16px rgba(20, 86, 184, .3);
  cursor: pointer;
  transition: all .25s ease;
  font-size: 18px;
  border: 0;
  position: relative;
}
.rq-float-btn:hover { transform: scale(1.08); background: var(--rq-primary-dark); }
.rq-float-btn .rq-tip {
  position: absolute; right: 60px; top: 50%; transform: translateY(-50%);
  background: rgba(0, 0, 0, .85); color: #fff;
  font-size: 12.5px;
  padding: 5px 10px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0; pointer-events: none;
  transition: opacity .2s ease;
}
.rq-float-btn:hover .rq-tip { opacity: 1; }

/* 灯箱 */
.rq-lightbox {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, .85);
  z-index: 200;
  display: none;
  align-items: center; justify-content: center;
  padding: 30px;
}
.rq-lightbox.rq-show { display: flex; }
.rq-lightbox img {
  max-width: 92%; max-height: 88vh;
  border-radius: 8px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, .5);
}
.rq-lightbox-close {
  position: absolute; top: 20px; right: 24px;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .15);
  color: #fff;
  border: 0;
  font-size: 22px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.rq-lightbox-close:hover { background: rgba(255, 255, 255, .25); }

/* 滚动渐显 */
.rq-reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s ease; }
.rq-reveal.rq-show { opacity: 1; transform: translateY(0); }

/* 响应式 */
@media (max-width: 1100px) {
  .rq-product-grid, .rq-advantage-grid { grid-template-columns: repeat(3, 1fr); }
  .rq-cities-grid { grid-template-columns: repeat(4, 1fr); }
  .rq-banner-title { font-size: 32px; }
  .rq-banner-decor { width: 280px; height: 280px; right: 4%; }
  .rq-nav-list > li > a { padding: 8px 11px; font-size: 14px; }
  .rq-nav-phone { font-size: 15px; padding-left: 12px; margin-left: 6px; }
  .rq-logo-name { font-size: 17px; }
  .rq-logo-sub { font-size: 11.5px; }
}
@media (max-width: 960px) {
  .rq-nav-list { display: none; }
  .rq-nav-phone { padding-left: 0; border: 0; margin-left: 0; }
  .rq-banner-decor { display: none; }
}
@media (max-width: 820px) {
  :root { --rq-header-h: 56px; }
  .rq-topbar { display: none; }
  .rq-banner { height: auto; padding: 48px 0; }
  .rq-banner-title { font-size: 26px; }
  .rq-banner-title small { font-size: 16px; }
  .rq-section { padding: 44px 0; }
  .rq-section-title h2 { font-size: 24px; }
  .rq-about-wrap, .rq-contact-wrap { grid-template-columns: 1fr; gap: 24px; }
  .rq-about-stats { grid-template-columns: repeat(2, 1fr); }
  .rq-product-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .rq-advantage-grid, .rq-scenarios-grid, .rq-sites-grid { grid-template-columns: 1fr; }
  .rq-cities-grid { grid-template-columns: repeat(3, 1fr); }
  .rq-footer-grid { grid-template-columns: 1fr; gap: 22px; }
}
@media (max-width: 480px) {
  .rq-product-grid { grid-template-columns: 1fr; }
  .rq-cities-grid { grid-template-columns: repeat(2, 1fr); }
  .rq-about-stats { grid-template-columns: repeat(2, 1fr); }
  .rq-banner-cta { flex-direction: column; align-items: stretch; }
  .rq-btn { justify-content: center; }
  .rq-contact-wrap { padding: 18px; }
  .rq-floatbar { right: 10px; bottom: 60px; }
  .rq-float-btn { width: 44px; height: 44px; font-size: 16px; }
}