/* ============================================
 * 陕西瑞泉水处理 - 通用基础样式
 * 字体: PingFang SC / Microsoft YaHei / Source Han Sans
 * 适配: PC / Pad / Mobile
 * ============================================ */

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", "Noto Sans CJK SC", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: #2c3e50;
  background: #f5f7fa;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--rq-accent, #0a84ff); }
button { font-family: inherit; cursor: pointer; border: 0; background: transparent; }
ul { list-style: none; }
h1, h2, h3, h4 { font-weight: 600; color: #1a2b3c; line-height: 1.35; }

.rq-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== 顶部导航 ========== */
.rq-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: background .25s ease, box-shadow .25s ease, padding .25s ease;
}
.rq-header-scrolled {
  background: rgba(255,255,255,0.98);
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.rq-header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.rq-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  white-space: nowrap;
}
.rq-logo-main, .rq-logo-sub {
  font-size: 22px;
  letter-spacing: 0.5px;
  color: #1a2b3c;
}
.rq-logo-sep {
  font-size: 22px;
  color: var(--rq-accent, #0a84ff);
  font-weight: 400;
  padding: 0 2px;
}
.rq-logo-footer .rq-logo-main,
.rq-logo-footer .rq-logo-sub {
  color: #fff;
}
.rq-nav {
  display: flex;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.rq-nav a {
  padding: 8px 12px;
  font-size: 14px;
  color: #34495e;
  border-radius: 6px;
  position: relative;
  white-space: nowrap;
}
.rq-nav a:hover {
  color: var(--rq-accent, #0a84ff);
  background: rgba(0,132,255,0.06);
}
.rq-tel {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  color: #34495e;
  padding-left: 18px;
  border-left: 1px solid #e3e8ef;
}
.rq-tel b {
  color: var(--rq-accent, #0a84ff);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.3px;
}
.rq-tel-icon { color: var(--rq-accent, #0a84ff); font-size: 16px; }
.rq-nav-toggle {
  display: none;
  font-size: 24px;
  color: #1a2b3c;
  padding: 4px 10px;
}

/* ========== 主Banner ========== */
.rq-banner {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  margin-top: 0;
  padding: 130px 0 80px;
  color: #fff;
  overflow: hidden;
}
.rq-banner-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  width: 100%;
  position: relative;
  z-index: 2;
}
.rq-banner-text { max-width: 720px; }
.rq-banner-eyebrow {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 100px;
  font-size: 14px;
  letter-spacing: 1.2px;
  margin-bottom: 22px;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(6px);
}
.rq-banner-title {
  font-size: 44px;
  line-height: 1.25;
  color: #fff;
  margin-bottom: 22px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.rq-banner-sub {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(255,255,255,0.92);
  margin-bottom: 32px;
  max-width: 640px;
}
.rq-banner-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.rq-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 13px 30px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  border: 1px solid transparent;
}
.rq-btn-primary {
  background: #fff;
  color: var(--rq-accent, #0a84ff);
  box-shadow: 0 6px 20px rgba(0,0,0,0.18);
}
.rq-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0,0,0,0.22);
  color: var(--rq-accent, #0a84ff);
}
.rq-btn-ghost {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}
.rq-btn-ghost:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}
.rq-banner-deco {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 50%;
  pointer-events: none;
}
.rq-deco-circle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  animation: rqFloat 9s ease-in-out infinite;
}
.rq-deco-1 { width: 360px; height: 360px; right: 8%; top: 20%; }
.rq-deco-2 { width: 220px; height: 220px; right: 28%; top: 55%; animation-delay: 2s; }
.rq-deco-3 { width: 140px; height: 140px; right: 5%; top: 65%; animation-delay: 4s; }
@keyframes rqFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-22px) scale(1.05); }
}

/* ========== 通用section ========== */
.rq-section {
  padding: 80px 0;
  position: relative;
}
.rq-section:nth-of-type(even) { background: #fff; }
.rq-section-title {
  font-size: 32px;
  text-align: center;
  margin-bottom: 12px;
  position: relative;
}
.rq-section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--rq-accent, #0a84ff);
  margin: 18px auto 0;
  border-radius: 2px;
}
.rq-section-sub {
  text-align: center;
  color: #7f8c8d;
  font-size: 15px;
  margin-bottom: 50px;
}

/* ========== 子站条 ========== */
.rq-subsite-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.rq-subsite-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 22px;
  background: #fff;
  border: 1px solid #e3e8ef;
  border-radius: 10px;
  font-size: 15px;
  color: #34495e;
  transition: all .25s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}
.rq-subsite-card:hover {
  border-color: var(--rq-accent, #0a84ff);
  color: var(--rq-accent, #0a84ff);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.rq-subsite-name { font-weight: 600; }
.rq-subsite-arrow { color: var(--rq-accent, #0a84ff); }

/* ========== 公司介绍 ========== */
.rq-about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 50px;
  align-items: stretch;
}
.rq-about-text p {
  margin-bottom: 16px;
  color: #4a5b6d;
  font-size: 15px;
  line-height: 1.85;
}
.rq-about-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.rq-about-list li {
  padding: 10px 14px;
  background: rgba(0,132,255,0.05);
  border-left: 3px solid var(--rq-accent, #0a84ff);
  border-radius: 4px;
  font-size: 14px;
  color: #34495e;
}
.rq-about-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.rq-stat-card {
  background: linear-gradient(135deg, var(--rq-accent, #0a84ff) 0%, #5e5ce6 100%);
  color: #fff;
  padding: 28px 18px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 6px 20px rgba(0,0,0,0.08);
  transition: transform .25s ease;
}
.rq-stat-card:hover { transform: translateY(-4px); }
.rq-stat-num {
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
}
.rq-stat-num sup { font-size: 18px; font-weight: 500; margin-left: 2px; }
.rq-stat-label {
  font-size: 14px;
  opacity: 0.92;
}

/* ========== 营销板块 ========== */
.rq-mkt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.rq-mkt-card {
  background: #fff;
  border: 1px solid #e3e8ef;
  border-radius: 12px;
  padding: 32px 28px;
  transition: all .25s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}
.rq-mkt-card:hover {
  border-color: var(--rq-accent, #0a84ff);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.08);
}
.rq-mkt-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--rq-accent, #0a84ff), #5e5ce6);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.rq-mkt-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  color: #1a2b3c;
}
.rq-mkt-card p {
  font-size: 14px;
  line-height: 1.8;
  color: #5a6b7c;
}

/* ========== 产品中心 ========== */
.rq-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 40px;
}
.rq-tab {
  padding: 9px 22px;
  border: 1px solid #e3e8ef;
  border-radius: 100px;
  font-size: 14px;
  color: #34495e;
  background: #fff;
  transition: all .2s ease;
}
.rq-tab:hover { border-color: var(--rq-accent, #0a84ff); color: var(--rq-accent, #0a84ff); }
.rq-tab-active {
  background: var(--rq-accent, #0a84ff);
  color: #fff;
  border-color: var(--rq-accent, #0a84ff);
}
.rq-product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.rq-product-card {
  background: #fff;
  border: 1px solid #e3e8ef;
  border-radius: 10px;
  overflow: hidden;
  transition: all .25s ease;
  display: flex;
  flex-direction: column;
}
.rq-product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.1);
  border-color: var(--rq-accent, #0a84ff);
}
.rq-product-img {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  cursor: zoom-in;
  background: #f5f7fa;
}
.rq-product-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.rq-product-card:hover .rq-product-img img { transform: scale(1.06); }
.rq-product-zoom {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 8px 12px;
  background: linear-gradient(0deg, rgba(0,0,0,0.6) 0%, transparent 100%);
  color: #fff;
  font-size: 13px;
  text-align: center;
  opacity: 0;
  transition: opacity .2s ease;
}
.rq-product-card:hover .rq-product-zoom { opacity: 1; }
.rq-product-info { padding: 16px 18px 18px; flex: 1; display: flex; flex-direction: column; }
.rq-product-name {
  font-size: 15px;
  font-weight: 600;
  color: #1a2b3c;
  margin-bottom: 8px;
  line-height: 1.5;
  min-height: 44px;
}
.rq-product-desc {
  font-size: 13px;
  color: #6a7b8c;
  line-height: 1.7;
  margin-bottom: 10px;
  flex: 1;
}
.rq-product-tag {
  align-self: flex-start;
  font-size: 12px;
  padding: 3px 10px;
  background: rgba(0,132,255,0.08);
  color: var(--rq-accent, #0a84ff);
  border-radius: 100px;
}

/* ========== 优势 ========== */
.rq-adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.rq-adv-item {
  background: #fff;
  border: 1px solid #e3e8ef;
  border-radius: 12px;
  padding: 32px 26px;
  transition: all .25s ease;
  position: relative;
  overflow: hidden;
}
.rq-adv-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 0;
  background: var(--rq-accent, #0a84ff);
  transition: height .35s ease;
}
.rq-adv-item:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(0,0,0,0.08); }
.rq-adv-item:hover::before { height: 100%; }
.rq-adv-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--rq-accent, #0a84ff);
  opacity: 0.4;
  margin-bottom: 8px;
}
.rq-adv-item h3 { font-size: 18px; margin-bottom: 8px; }
.rq-adv-item p { font-size: 14px; color: #5a6b7c; line-height: 1.8; }

/* ========== FAQ ========== */
.rq-faq-list { max-width: 980px; margin: 0 auto; }
.rq-faq-item {
  background: #fff;
  border: 1px solid #e3e8ef;
  border-radius: 10px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: all .25s ease;
}
.rq-faq-item:hover { border-color: var(--rq-accent, #0a84ff); }
.rq-faq-q {
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}
.rq-faq-i {
  color: var(--rq-accent, #0a84ff);
  font-weight: 700;
  flex-shrink: 0;
}
.rq-faq-qt { flex: 1; font-size: 15px; color: #1a2b3c; font-weight: 500; }
.rq-faq-toggle {
  font-size: 22px;
  color: var(--rq-accent, #0a84ff);
  font-weight: 300;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
}
.rq-faq-a {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
  color: #5a6b7c;
  font-size: 14px;
  line-height: 1.85;
  background: #f9fafc;
  border-top: 1px solid transparent;
}
.rq-faq-open .rq-faq-a {
  max-height: 600px;
  padding: 16px 22px 20px;
  border-top-color: #eef0f3;
}

/* ========== 联系 ========== */
.rq-contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
  align-items: stretch;
}
.rq-contact-card {
  background: #fff;
  border: 1px solid #e3e8ef;
  border-radius: 12px;
  padding: 32px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}
.rq-contact-row {
  display: flex;
  padding: 14px 0;
  border-bottom: 1px dashed #e3e8ef;
  align-items: flex-start;
  gap: 16px;
}
.rq-contact-row:last-of-type { border-bottom: 0; }
.rq-contact-label {
  flex-shrink: 0;
  width: 90px;
  color: #7f8c8d;
  font-size: 14px;
}
.rq-contact-val {
  flex: 1;
  color: #1a2b3c;
  font-size: 15px;
  word-break: break-all;
}
.rq-contact-val a { color: var(--rq-accent, #0a84ff); }
.rq-contact-cta {
  margin-top: 22px;
  width: 100%;
  justify-content: center;
}
.rq-contact-wechat {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.rq-contact-wx-img {
  width: 200px;
  height: 200px;
  border: 6px solid #f5f7fa;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 18px;
}
.rq-contact-wx-img img { width: 100%; height: 100%; object-fit: cover; }
.rq-contact-wx-tip {
  color: #5a6b7c;
  font-size: 14px;
  line-height: 1.6;
}

/* ========== 友链 ========== */
.rq-friend-grid {
  display: grid;
  grid-template-columns: repeat(11, 1fr);
  gap: 8px;
}
.rq-friend-item {
  display: block;
  text-align: center;
  padding: 12px 6px;
  background: #fff;
  border: 1px solid #e3e8ef;
  border-radius: 6px;
  font-size: 14px;
  color: #34495e;
  transition: all .2s ease;
}
.rq-friend-item:hover {
  border-color: var(--rq-accent, #0a84ff);
  color: var(--rq-accent, #0a84ff);
  background: rgba(0,132,255,0.05);
}

/* ========== 底部 ========== */
.rq-footer {
  background: #1a2b3c;
  color: #c8d0d8;
  padding: 60px 0 24px;
  margin-top: 0;
}
.rq-footer-top {
  display: grid;
  grid-template-columns: 1fr 2.5fr;
  gap: 50px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.rq-footer-brand .rq-logo { margin-bottom: 14px; }
.rq-footer-desc {
  font-size: 14px;
  color: #8a9aab;
  line-height: 1.7;
  max-width: 280px;
}
.rq-footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.rq-footer-col h4 {
  font-size: 15px;
  color: #fff;
  margin-bottom: 16px;
}
.rq-footer-col a, .rq-footer-col p {
  display: block;
  font-size: 13px;
  color: #8a9aab;
  margin-bottom: 8px;
  transition: color .2s ease;
}
.rq-footer-col a:hover { color: #fff; }
.rq-footer-bot {
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #6a7b8c;
  line-height: 1.9;
}
.rq-footer-bot a { color: #8a9aab; }
.rq-footer-bot a:hover { color: #fff; }

/* ========== 灯箱 ========== */
.rq-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
}
.rq-lightbox-open { display: flex; }
.rq-lightbox-mask {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.85);
  cursor: zoom-out;
}
.rq-lightbox-body {
  position: relative;
  z-index: 2;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.rq-lightbox-close {
  position: absolute;
  top: -36px; right: -6px;
  color: #fff;
  font-size: 32px;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
}
.rq-lightbox-img img {
  max-width: 90vw;
  max-height: 78vh;
  border-radius: 8px;
  background: #fff;
}
.rq-lightbox-cap {
  color: #fff;
  font-size: 14px;
  margin-top: 12px;
  text-align: center;
}

/* ========== 滚动揭示动画 ========== */
.rq-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s ease, transform .8s ease;
}
.rq-show {
  opacity: 1;
  transform: none;
}

/* ========== 响应式 ========== */
@media (max-width: 1100px) {
  .rq-product-grid { grid-template-columns: repeat(3, 1fr); }
  .rq-friend-grid { grid-template-columns: repeat(8, 1fr); }
  .rq-subsite-grid { grid-template-columns: repeat(3, 1fr); }
  .rq-tel { display: none; }
}
@media (max-width: 820px) {
  .rq-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; padding: 12px 0; box-shadow: 0 8px 18px rgba(0,0,0,0.08); }
  .rq-nav-open { display: flex; }
  .rq-nav a { padding: 12px 24px; }
  .rq-nav-toggle { display: block; }
  .rq-banner { min-height: 460px; padding: 110px 0 60px; }
  .rq-banner-title { font-size: 32px; }
  .rq-banner-sub { font-size: 15px; }
  .rq-banner-deco { opacity: 0.4; }
  .rq-about-grid { grid-template-columns: 1fr; }
  .rq-mkt-grid, .rq-adv-grid { grid-template-columns: 1fr 1fr; }
  .rq-product-grid { grid-template-columns: 1fr 1fr; }
  .rq-friend-grid { grid-template-columns: repeat(6, 1fr); }
  .rq-contact-grid { grid-template-columns: 1fr; }
  .rq-footer-top { grid-template-columns: 1fr; gap: 30px; }
  .rq-footer-cols { grid-template-columns: 1fr 1fr; }
  .rq-section { padding: 60px 0; }
  .rq-section-title { font-size: 26px; }
}
@media (max-width: 600px) {
  .rq-header-inner { padding: 12px 16px; gap: 10px; }
  .rq-logo-main, .rq-logo-sub, .rq-logo-sep { font-size: 18px; }
  .rq-container { padding: 0 16px; }
  .rq-banner-title { font-size: 24px; }
  .rq-banner-sub { font-size: 14px; }
  .rq-banner-eyebrow { font-size: 12px; padding: 5px 12px; }
  .rq-btn { padding: 11px 22px; font-size: 14px; }
  .rq-mkt-grid, .rq-adv-grid, .rq-product-grid { grid-template-columns: 1fr; }
  .rq-friend-grid { grid-template-columns: repeat(4, 1fr); }
  .rq-about-list { grid-template-columns: 1fr; }
  .rq-subsite-grid { grid-template-columns: 1fr 1fr; }
  .rq-stat-card { padding: 22px 14px; }
  .rq-stat-num { font-size: 28px; }
  .rq-section { padding: 50px 0; }
  .rq-section-title { font-size: 22px; }
  .rq-section-sub { margin-bottom: 30px; font-size: 14px; }
  .rq-footer-cols { grid-template-columns: 1fr; }
  .rq-contact-card { padding: 24px 18px; }
  .rq-contact-wx-img { width: 160px; height: 160px; }
}