/* ==========================================================
   common.css — 瑞成数控机床官网 · 公共样式（头/尾/导航/按钮/变量/响应式）
   所有 div class 前缀：ruicheng-
   ========================================================== */

/* ---------- 1. CSS 变量 ---------- */
:root {
  --ruicheng-primary: #0B3D91;
  --ruicheng-primary-dark: #062A66;
  --ruicheng-primary-light: #2459B3;
  --ruicheng-accent: #C9A96E;
  --ruicheng-accent-dark: #A8884E;
  --ruicheng-bg: #F5F7FA;
  --ruicheng-bg-dark: #0A1A33;
  --ruicheng-text: #1A2332;
  --ruicheng-text-sub: #6B7280;
  --ruicheng-text-light: #9CA3AF;
  --ruicheng-border: #E5E7EB;
  --ruicheng-border-light: #F1F3F5;
  --ruicheng-white: #FFFFFF;
  --ruicheng-shadow-sm: 0 2px 8px rgba(10, 22, 40, 0.05);
  --ruicheng-shadow-md: 0 4px 20px rgba(11, 61, 145, 0.08);
  --ruicheng-shadow-lg: 0 12px 36px rgba(11, 61, 145, 0.15);
  --ruicheng-radius: 8px;
  --ruicheng-radius-sm: 4px;
  --ruicheng-section-py: 80px;
  --ruicheng-container-max: 1450px;
  --ruicheng-header-h: 88px;
  --ruicheng-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ruicheng-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- 2. CSS Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ruicheng-text);
  background: var(--ruicheng-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; transition: color .25s var(--ruicheng-ease); }
a:hover { color: var(--ruicheng-primary); }

button, input, textarea, select {
  font: inherit; color: inherit; background: none; border: none; outline: none;
}
button { cursor: pointer; }

h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--ruicheng-text); }

ul, ol { list-style: none; }

::selection { background: var(--ruicheng-primary); color: #fff; }

/* ---------- 3. 通用容器 & 工具类 ---------- */
.ruicheng-container {
  width: 100%;
  max-width: var(--ruicheng-container-max);
  margin: 0 auto;
  padding: 0 30px;
}

.ruicheng-is-hidden { display: none !important; }

.ruicheng-d-flex { display: flex; }
.ruicheng-d-inline-flex { display: inline-flex; }
.ruicheng-items-center { align-items: center; }
.ruicheng-justify-between { justify-content: space-between; }
.ruicheng-justify-center { justify-content: center; }
.ruicheng-text-center { text-align: center; }
.ruicheng-mt-20 { margin-top: 20px; }
.ruicheng-mt-40 { margin-top: 40px; }
.ruicheng-mt-60 { margin-top: 60px; }
.ruicheng-mb-20 { margin-bottom: 20px; }
.ruicheng-mb-30 { margin-bottom: 30px; }
.ruicheng-mb-40 { margin-bottom: 40px; }
.ruicheng-py-section { padding-top: var(--ruicheng-section-py); padding-bottom: var(--ruicheng-section-py); }

/* 滚动入场通用 */
[data-animate] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ruicheng-ease-out),
              transform 0.8s var(--ruicheng-ease-out);
  will-change: opacity, transform;
}
[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-animate-delay="1"] { transition-delay: 0.08s; }
[data-animate-delay="2"] { transition-delay: 0.16s; }
[data-animate-delay="3"] { transition-delay: 0.24s; }
[data-animate-delay="4"] { transition-delay: 0.32s; }

/* ---------- 4. 按钮组件 ---------- */
.ruicheng-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 34px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--ruicheng-radius-sm);
  border: 2px solid transparent;
  transition: all .3s var(--ruicheng-ease);
  white-space: nowrap;
  letter-spacing: .5px;
  line-height: 1.2;
}

.ruicheng-btn-primary {
  background: var(--ruicheng-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(11, 61, 145, 0.28);
}
.ruicheng-btn-primary:hover {
  background: var(--ruicheng-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(11, 61, 145, 0.38);
}

.ruicheng-btn-gold {
  background: transparent;
  color: var(--ruicheng-white);
  border-color: var(--ruicheng-accent);
  color: var(--ruicheng-accent);
}
.ruicheng-btn-gold:hover {
  background: var(--ruicheng-accent);
  color: var(--ruicheng-text);
  transform: translateY(-2px);
}

.ruicheng-btn-outline {
  background: transparent;
  border-color: var(--ruicheng-white);
  color: #fff;
}
.ruicheng-btn-outline:hover {
  background: var(--ruicheng-white);
  color: var(--ruicheng-primary);
  transform: translateY(-2px);
}

.ruicheng-btn-arrow::after {
  content: "→";
  margin-left: 4px;
  transition: transform .25s var(--ruicheng-ease);
}
.ruicheng-btn-arrow:hover::after { transform: translateX(4px); }

/* ---------- Topbar 顶部条 ---------- */
.ruicheng-topbar {
  background: #062A66;
  opacity: 0.9;
  height: 36px;
  font-size: 12px;
  color: #fff;
  line-height: 36px;
  position: relative;
  z-index: 110;
}
.ruicheng-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
}
.ruicheng-topbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  overflow: hidden;
}
.ruicheng-topbar-left i { color: var(--ruicheng-accent); }
.ruicheng-topbar-right {
  display: flex;
  align-items: center;
  gap: 18px;
}
.ruicheng-topbar-wechat,
.ruicheng-topbar-lang {
  position: relative;
  display: flex;
  align-items: center;
  cursor: pointer;
  height: 36px;
  padding: 0 8px;
}
.ruicheng-topbar-icon {
  display: flex;
  align-items: center;
  gap: 6px;
  transition: opacity .25s;
  height: 100%;
}
.ruicheng-topbar-icon:hover { opacity: 0.85; }
.ruicheng-topbar-wechat-popup {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: #fff;
  color: var(--ruicheng-text);
  padding: 14px;
  border-radius: var(--ruicheng-radius);
  box-shadow: var(--ruicheng-shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all .28s var(--ruicheng-ease);
  z-index: 200;
  min-width: 160px;
  text-align: center;
  border: 1px solid var(--ruicheng-border-light);
}
.ruicheng-topbar-wechat-popup::after {
  content: "";
  position: absolute;
  right: 18px;
  top: -6px;
  width: 12px;
  height: 12px;
  background: #fff;
  border-left: 1px solid var(--ruicheng-border-light);
  border-top: 1px solid var(--ruicheng-border-light);
  transform: rotate(45deg);
}
.ruicheng-topbar-wechat-popup img {
  width: 130px;
  height: 130px;
  object-fit: cover;
  margin: 0 auto 8px;
  border: 1px solid var(--ruicheng-border);
  border-radius: var(--ruicheng-radius-sm);
}
.ruicheng-topbar-wechat-popup p {
  font-size: 12px;
  line-height: 1.4;
  color: var(--ruicheng-text-sub);
  margin: 0;
}
.ruicheng-qr-placeholder {
  width: 130px;
  height: 130px;
  margin: 0 auto 8px;
  border: 1px solid var(--ruicheng-border);
  border-radius: var(--ruicheng-radius-sm);
  background: #07C160;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.ruicheng-qr-placeholder span {
  font-size: 12px;
  margin-top: 8px;
  font-weight: 500;
}
/* 后台自定义单文件字段 wxewm 上传的公众号二维码图片 */
.ruicheng-qr-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--ruicheng-radius-sm);
  display: block;
}
.ruicheng-qr-placeholder-sm {
  width: 100%;
  height: 100%;
  background: #07C160;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 28px;
  border-radius: var(--ruicheng-radius-sm);
}
.ruicheng-topbar-wechat:hover .ruicheng-topbar-wechat-popup {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.ruicheng-topbar-lang-trigger {
  display: flex;
  align-items: center;
  gap: 6px;
  transition: opacity .25s;
  height: 100%;
}
.ruicheng-topbar-lang-trigger:hover { opacity: 0.85; }
/* ==========================================================
   多语言旗帜图标（纯 CSS 渐变绘制，不依赖 Emoji / 图片）
   说明：早期版本此处使用 Emoji 国旗字符，在 GB2312/GBK 编码另存时
   会被替换为 "?" 造成不可逆乱码。改用 CSS 绘制后彻底免疫编码问题。
   ========================================================== */
.ruicheng-flag {
  display: inline-block;
  width: 20px;
  height: 14px;
  flex: 0 0 20px;
  margin-right: 6px;
  border-radius: 2px;
  overflow: hidden;
  vertical-align: -2px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .12) inset;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100% 100%;
}
/* 中国 */
.ruicheng-flag--zh {
  background-color: #DE2910;
  background-image: radial-gradient(circle at 26% 30%, #FFDE00 0 16%, transparent 17%),
                    radial-gradient(circle at 42% 15%, #FFDE00 0 7%, transparent 8%),
                    radial-gradient(circle at 46% 27%, #FFDE00 0 7%, transparent 8%),
                    radial-gradient(circle at 46% 41%, #FFDE00 0 7%, transparent 8%),
                    radial-gradient(circle at 42% 53%, #FFDE00 0 7%, transparent 8%);
}
/* 美国 */
.ruicheng-flag--en {
  background-color: #B22234;
  background-image: repeating-linear-gradient(to bottom,
    #B22234 0 7.7%, #FFFFFF 7.7% 15.4%);
}
/* 韩国 */
.ruicheng-flag--ko {
  background-color: #FFFFFF;
  background-image: radial-gradient(circle at 50% 50%, #CD2E3A 0 22%, transparent 23%),
                    radial-gradient(circle at 50% 50%, #0047A0 0 11%, transparent 12%);
}
/* 日本 */
.ruicheng-flag--ja {
  background-color: #FFFFFF;
  background-image: radial-gradient(circle at 50% 50%, #BC002D 0 30%, transparent 31%);
}
/* 德国 */
.ruicheng-flag--de {
  background-color: #000000;
  background-image: linear-gradient(to bottom,
    #000000 0 33.3%, #DD0000 33.3% 66.6%, #FFCE00 66.6% 100%);
}
/* 俄罗斯 */
.ruicheng-flag--ru {
  background-color: #FFFFFF;
  background-image: linear-gradient(to bottom,
    #FFFFFF 0 33.3%, #0039A6 33.3% 66.6%, #D52B1E 66.6% 100%);
}
.ruicheng-topbar-lang-dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: #fff;
  color: var(--ruicheng-text);
  border-radius: var(--ruicheng-radius);
  box-shadow: var(--ruicheng-shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all .28s var(--ruicheng-ease);
  z-index: 200;
  min-width: 170px;
  padding: 8px;
  border: 1px solid var(--ruicheng-border-light);
}
.ruicheng-topbar-lang-dropdown::after {
  content: "";
  position: absolute;
  right: 18px;
  top: -6px;
  width: 12px;
  height: 12px;
  background: #fff;
  border-left: 1px solid var(--ruicheng-border-light);
  border-top: 1px solid var(--ruicheng-border-light);
  transform: rotate(45deg);
}
.ruicheng-topbar-lang-dropdown a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  font-size: 13px;
  border-radius: var(--ruicheng-radius-sm);
  color: var(--ruicheng-text);
  transition: all .2s;
}
.ruicheng-topbar-lang-dropdown a:hover {
  background: rgba(11,61,145,0.08);
  color: var(--ruicheng-primary);
}
.ruicheng-topbar-lang:hover .ruicheng-topbar-lang-dropdown,
.ruicheng-topbar-lang.is-open .ruicheng-topbar-lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
/* 旗帜与文字基线对齐微调 */
.ruicheng-topbar-lang-trigger .ruicheng-flag,
.ruicheng-topbar-lang-dropdown .ruicheng-flag { vertical-align: -2px; }

/* ---------- 5. Header & 导航 ---------- */
.ruicheng-header {
  position: sticky;
  top: 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 transparent;
  transition: all .3s var(--ruicheng-ease);
}
.ruicheng-header--sticky {
  border-bottom-color: var(--ruicheng-border-light);
  box-shadow: 0 2px 16px rgba(10, 22, 40, 0.06);
}

.ruicheng-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--ruicheng-header-h);
  gap: 40px;
  position: relative;
  z-index: 1;
}

.ruicheng-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  height: 100%;
}
.ruicheng-logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
}

/* 主导航 */
.ruicheng-nav { flex: 1; display: flex; justify-content: center; }
.ruicheng-nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  position: relative;
}
.ruicheng-nav-item { position: relative; }
.ruicheng-nav-item:has(> .ruicheng-megamenu) { position: static; }
.ruicheng-nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0 18px;
  height: var(--ruicheng-header-h);
  font-size: 16px;
  font-weight: 500;
  color: var(--ruicheng-text);
  position: relative;
  transition: color .25s var(--ruicheng-ease);
}
.ruicheng-nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 3px;
  background: var(--ruicheng-primary);
  transform: translateX(-50%);
  transition: width .3s var(--ruicheng-ease);
}
.ruicheng-nav-item:hover > .ruicheng-nav-link,
.ruicheng-nav-link.is-active {
  color: var(--ruicheng-primary);
}
.ruicheng-nav-item:hover > .ruicheng-nav-link::after,
.ruicheng-nav-link.is-active::after {
  width: 40px;
}
.ruicheng-nav-link.has-sub::before {
  content: "▾";
  margin-left: 4px;
  font-size: 10px;
  opacity: .6;
  transition: transform .25s var(--ruicheng-ease);
}
.ruicheng-nav-item:hover > .ruicheng-nav-link.has-sub::before {
  transform: rotate(180deg);
}

/* 普通下拉 */
.ruicheng-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 160px;
  background: #fff;
  border-radius: var(--ruicheng-radius);
  box-shadow: var(--ruicheng-shadow-md);
  padding: 10px;
  opacity: 0;
  visibility: hidden;
  transition: all .28s var(--ruicheng-ease);
  z-index: 200;
}
.ruicheng-nav-item:hover > .ruicheng-dropdown,
.ruicheng-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.ruicheng-dropdown-link {
  display: block;
  padding: 8px 12px;
  border-radius: var(--ruicheng-radius-sm);
  font-size: 15px;
  color: var(--ruicheng-text);
  text-align: left;
  transition: all .2s var(--ruicheng-ease);
}
.ruicheng-dropdown-link:hover {
  background: rgba(11, 61, 145, 0.06);
  color: var(--ruicheng-primary);
  padding-left: 16px;
}

/* Mega Menu — 产品中心 8 分类 */
.ruicheng-megamenu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  width: 100vw;
  max-width: 1450px;
  background: #fff;
  border-radius: var(--ruicheng-radius);
  box-shadow: var(--ruicheng-shadow-lg);
  padding: 28px 32px 24px;
  opacity: 0;
  visibility: hidden;
  transition: all .28s var(--ruicheng-ease);
  z-index: 200;
  box-sizing: border-box;
}
.ruicheng-nav-item:hover > .ruicheng-megamenu,
.ruicheng-megamenu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.ruicheng-megamenu-title {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(11, 61, 145, 0.08);
  color: var(--ruicheng-primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--ruicheng-radius-sm);
  letter-spacing: 1px;
  margin-bottom: 22px;
}
.ruicheng-megamenu-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.ruicheng-megamenu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--ruicheng-radius);
  transition: all .25s var(--ruicheng-ease);
}
.ruicheng-megamenu-item:hover {
  background: var(--ruicheng-bg);
  transform: translateY(-2px);
}
.ruicheng-megamenu-item:hover .ruicheng-megamenu-name {
  color: var(--ruicheng-primary);
}
.ruicheng-megamenu-thumb {
  width: 56px;
  height: 56px;
  border-radius: var(--ruicheng-radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--ruicheng-bg);
}
.ruicheng-megamenu-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .35s var(--ruicheng-ease);
}
.ruicheng-megamenu-item:hover .ruicheng-megamenu-thumb img {
  transform: scale(1.08);
}
.ruicheng-megamenu-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ruicheng-text);
  margin-bottom: 2px;
  transition: color .2s var(--ruicheng-ease);
}
.ruicheng-megamenu-desc {
  font-size: 12px;
  color: var(--ruicheng-text-sub);
  line-height: 1.4;
}

/* 头部右侧：搜索 + 热线 */
.ruicheng-header-right {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-shrink: 0;
}
.ruicheng-search-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--ruicheng-text-sub);
  transition: all .25s var(--ruicheng-ease);
}
.ruicheng-search-btn:hover {
  background: var(--ruicheng-bg);
  color: var(--ruicheng-primary);
}
.ruicheng-search-btn svg { width: 20px; height: 20px; }

.ruicheng-hotline {
  display: flex;
  align-items: center;
  gap: 10px;
}
.ruicheng-hotline-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(201, 169, 110, 0.12);
  color: var(--ruicheng-accent-dark);
  border-radius: var(--ruicheng-radius-sm);
}
.ruicheng-hotline-icon svg { width: 20px; height: 20px; }
.ruicheng-hotline-label {
  font-size: 12px;
  color: var(--ruicheng-text-sub);
  line-height: 1.2;
  margin-bottom: 2px;
}
.ruicheng-hotline-number {
  font-size: 18px;
  font-weight: 700;
  color: var(--ruicheng-primary);
  line-height: 1.2;
  letter-spacing: .5px;
}

/* 汉堡按钮（桌面端隐藏） */
.ruicheng-hamburger {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: var(--ruicheng-radius-sm);
  background: var(--ruicheng-bg);
}
.ruicheng-hamburger span {
  width: 22px;
  height: 2px;
  background: var(--ruicheng-text);
  border-radius: 2px;
  transition: all .3s var(--ruicheng-ease);
}
.ruicheng-hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.ruicheng-hamburger.is-open span:nth-child(2) { opacity: 0; }
.ruicheng-hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 移动端抽屉 */
.ruicheng-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 22, 40, 0.5);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: all .3s var(--ruicheng-ease);
  z-index: 500;
}
.ruicheng-drawer-overlay.is-open { opacity: 1; visibility: visible; }

.ruicheng-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(360px, 86vw);
  height: 100vh;
  background: #fff;
  z-index: 501;
  transform: translateX(100%);
  transition: transform .35s var(--ruicheng-ease-out);
  overflow-y: auto;
  padding: 22px 20px 60px;
  box-shadow: -8px 0 32px rgba(10, 22, 40, 0.1);
}
.ruicheng-drawer.is-open { transform: translateX(0); }

.ruicheng-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ruicheng-border-light);
}
.ruicheng-drawer-head .ruicheng-logo img { height: 40px; }
.ruicheng-drawer-close {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--ruicheng-bg);
  color: var(--ruicheng-text-sub);
  font-size: 18px;
}
.ruicheng-drawer-close:hover { color: var(--ruicheng-primary); }

.ruicheng-drawer-nav-item {
  border-bottom: 1px solid var(--ruicheng-border-light);
}
.ruicheng-drawer-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ruicheng-text);
}
.ruicheng-drawer-nav-link.has-sub::after {
  content: "＋";
  font-weight: 400;
  color: var(--ruicheng-text-light);
  transition: transform .25s var(--ruicheng-ease);
}
.ruicheng-drawer-nav-link.has-sub.is-open::after {
  transform: rotate(45deg);
  color: var(--ruicheng-primary);
}
.ruicheng-drawer-submenu {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s var(--ruicheng-ease);
  background: var(--ruicheng-bg);
  border-radius: var(--ruicheng-radius-sm);
  margin: 0 0 12px;
  padding: 0 14px;
}
.ruicheng-drawer-submenu.is-open { max-height: 1200px; padding: 10px 14px; }
.ruicheng-drawer-submenu a {
  display: block;
  padding: 10px 8px;
  font-size: 14px;
  color: var(--ruicheng-text-sub);
  border-bottom: 1px dashed var(--ruicheng-border-light);
}
.ruicheng-drawer-submenu a:last-child { border-bottom: none; }
.ruicheng-drawer-submenu a:hover {
  color: var(--ruicheng-primary);
  padding-left: 14px;
}
.ruicheng-drawer-cta {
  margin-top: 22px;
  padding: 16px;
  text-align: center;
  background: var(--ruicheng-primary);
  color: #fff;
  border-radius: var(--ruicheng-radius);
}
.ruicheng-drawer-cta .ruicheng-drawer-cta-label { font-size: 12px; opacity: .8; }
.ruicheng-drawer-cta .ruicheng-drawer-cta-tel { font-size: 22px; font-weight: 700; margin-top: 4px; letter-spacing: .5px; }

/* 搜索弹层 */
.ruicheng-search-overlay {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  z-index: 600;
  padding: 40px 0;
  transform: translateY(-100%);
  transition: transform .35s var(--ruicheng-ease-out);
  box-shadow: var(--ruicheng-shadow-md);
}
.ruicheng-search-overlay.is-open { transform: translateY(0); }
.ruicheng-search-box {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
}
.ruicheng-search-box input {
  width: 100%;
  height: 64px;
  padding: 0 70px 0 30px;
  font-size: 18px;
  border: 2px solid var(--ruicheng-border);
  border-radius: var(--ruicheng-radius);
  background: #fff;
  transition: border-color .25s;
}
.ruicheng-search-box input:focus { border-color: var(--ruicheng-primary); }
.ruicheng-search-box button {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: var(--ruicheng-radius-sm);
  background: var(--ruicheng-primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
}
.ruicheng-search-box button svg { width: 20px; height: 20px; }
.ruicheng-search-close {
  position: absolute;
  top: 22px;
  right: 30px;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--ruicheng-bg);
  color: var(--ruicheng-text-sub);
  font-size: 20px;
}

/* ---------- 6. Footer ---------- */
.ruicheng-footer {
  background: var(--ruicheng-bg-dark);
  color: rgba(255,255,255,0.78);
  padding-top: 72px;
  position: relative;
  overflow: hidden;
}
.ruicheng-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--ruicheng-primary);
}
.ruicheng-footer::after {
  content: "";
  position: absolute;
  top: -200px; right: -120px;
  width: 420px; height: 420px;
  background: rgba(11, 61, 145, 0.27);
  pointer-events: none;
}

.ruicheng-footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.3fr 1.3fr;
  gap: 56px;
  padding-bottom: 56px;
  position: relative;
  z-index: 1;
}
.ruicheng-footer-col h4 {
  font-size: 17px;
  color: #fff;
  margin-bottom: 22px;
  font-weight: 600;
  position: relative;
  padding-bottom: 14px;
}
.ruicheng-footer-col h4::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 36px;
  height: 2px;
  background: var(--ruicheng-accent);
}
.ruicheng-footer-brand .ruicheng-logo-footer {
  display: inline-block;
  margin-bottom: 20px;
  background: #fff;
  padding: 10px 18px;
  border-radius: var(--ruicheng-radius);
}
.ruicheng-footer-brand .ruicheng-logo-footer img { height: 42px; }
.ruicheng-footer-desc {
  font-size: 14px;
  line-height: 1.9;
  margin-bottom: 24px;
  color: rgba(255,255,255,0.65);
}
.ruicheng-footer-qr {
  display: flex;
  gap: 16px;
  align-items: flex-end;
}
.ruicheng-footer-qr-item {
  width: 96px;
  text-align: center;
}
.ruicheng-footer-qr-thumb {
  width: 96px; height: 96px;
  background: #fff;
  padding: 6px;
  border-radius: var(--ruicheng-radius);
  overflow: hidden;
  margin-bottom: 8px;
}
.ruicheng-footer-qr-thumb img { width: 100%; height: 100%; object-fit: cover; }
.ruicheng-footer-qr-thumb img.placeholder {
  object-fit: contain;
  padding: 6px;
  opacity: .85;
}
.ruicheng-footer-qr-label {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
}

.ruicheng-footer-links li {
  margin-bottom: 12px;
  font-size: 14px;
}
.ruicheng-footer-links a {
  color: rgba(255,255,255,0.72);
  position: relative;
  padding-left: 14px;
  transition: all .25s var(--ruicheng-ease);
}
.ruicheng-footer-links a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  background: var(--ruicheng-accent);
  border-radius: 50%;
  transform: translateY(-50%) scale(.6);
  opacity: .6;
  transition: all .25s;
}
.ruicheng-footer-links a:hover {
  color: var(--ruicheng-accent);
  padding-left: 18px;
}
.ruicheng-footer-links a:hover::before {
  opacity: 1;
  transform: translateY(-50%) scale(1);
}

.ruicheng-footer-product {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 20px;
}
.ruicheng-footer-product a {
  font-size: 14px;
  color: rgba(255,255,255,0.72);
  padding: 6px 0;
  transition: color .25s;
  display: block;
}
.ruicheng-footer-product a:hover { color: var(--ruicheng-accent); }

.ruicheng-contact-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.1);
}
.ruicheng-contact-item:last-child { border-bottom: none; }
.ruicheng-contact-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--ruicheng-radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--ruicheng-accent);
}
.ruicheng-contact-icon svg { width: 18px; height: 18px; }
.ruicheng-contact-label {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 3px;
}
.ruicheng-contact-value {
  font-size: 14px;
  color: #fff;
  line-height: 1.6;
  word-break: break-all;
}
.ruicheng-contact-map {
  margin-top: 18px;
  border-radius: var(--ruicheng-radius);
  overflow: hidden;
  height: 120px;
  border: 1px solid rgba(255,255,255,0.1);
}
.ruicheng-contact-map img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(30%) brightness(0.9);
  transition: transform .35s;
}
.ruicheng-contact-map img:hover { transform: scale(1.04); filter: none; }

.ruicheng-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  position: relative;
  z-index: 1;
}
.ruicheng-footer-bottom-links { display: flex; gap: 22px; }
.ruicheng-footer-bottom-links a:hover { color: var(--ruicheng-accent); }

/* ---------- 8. 响应式断点 ---------- */

/* Laptop：992~1199px */
@media (max-width: 1199px) {
  .ruicheng-header-h { --ruicheng-header-h: 80px; }
  .ruicheng-header-inner { gap: 24px; }
  .ruicheng-nav-link { padding: 0 14px; font-size: 15px; }
  .ruicheng-megamenu { width: 760px; padding: 22px 24px; }
  .ruicheng-hotline-number { font-size: 16px; }
  .ruicheng-footer-top { grid-template-columns: 1.2fr 1fr 1.2fr 1.2fr; gap: 40px; }
}

/* Tablet：768~991px —— 导航变汉堡 */
@media (max-width: 991px) {
  :root { --ruicheng-section-py: 64px; }
  .ruicheng-container { padding: 0 22px; }
  .ruicheng-nav,
  .ruicheng-search-btn,
  .ruicheng-hotline { display: none; }
  .ruicheng-hamburger { display: inline-flex; }

  .ruicheng-header-inner { height: 76px; }
  .ruicheng-logo img { height: 44px; }

  .ruicheng-footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 48px 44px;
  }
  .ruicheng-footer-col:first-child { grid-column: 1 / -1; }
  .ruicheng-footer-bottom { flex-direction: column; text-align: center; }
}

/* ---------- 9. 右侧在线客服悬浮 ---------- */
.ruicheng-float-service {
  position: fixed;
  right: 14px;
  bottom: 160px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ruicheng-float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #0B3D91;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(11, 61, 145, 0.4);
  cursor: pointer;
  position: relative;
  transition: all .3s var(--ruicheng-ease);
  font-size: 20px;
}
.ruicheng-float-btn:hover {
  transform: translateY(-3px);
  background: var(--ruicheng-accent);
}
.ruicheng-float-tooltip {
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%) translateX(8px);
  background: #fff;
  color: var(--ruicheng-text);
  padding: 14px 18px;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(10, 22, 40, 0.15);
  opacity: 0;
  visibility: hidden;
  transition: all .3s;
  white-space: nowrap;
  border: 1px solid var(--ruicheng-border-light);
  z-index: 91;
}
.ruicheng-float-tooltip::after {
  content: "";
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: #fff;
  border-right: 1px solid var(--ruicheng-border-light);
  border-bottom: 1px solid var(--ruicheng-border-light);
}
.ruicheng-float-btn:hover .ruicheng-float-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

/* Mobile：< 768px */
@media (max-width: 767px) {
  :root { --ruicheng-section-py: 52px; }
  body { font-size: 14px; line-height: 1.75; }
  .ruicheng-container { padding: 0 16px; }
  .ruicheng-btn { padding: 12px 24px; font-size: 14px; }

  .ruicheng-header-inner { height: 68px; gap: 10px; }
  .ruicheng-logo img { height: 38px; }

  .ruicheng-footer { padding-top: 52px; }
  .ruicheng-footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
    padding-bottom: 40px;
  }
  .ruicheng-footer-qr { flex-direction: column; align-items: flex-start; }
  .ruicheng-footer-product { grid-template-columns: 1fr 1fr; }
  .ruicheng-footer-bottom { padding: 18px 0; font-size: 12px; }
  .ruicheng-footer-bottom-links { flex-wrap: wrap; justify-content: center; gap: 14px; }

  .ruicheng-back-top {
    display: none;
  }
  .ruicheng-megamenu { display: none !important; }
  .ruicheng-topbar { display: none; }
  .ruicheng-float-service {
    right: 10px;
    bottom: 120px;
    gap: 8px;
  }
  .ruicheng-float-btn {
    width: 44px;
    height: 44px;
    font-size: 17px;
  }
}

/* ==========================================================================
   公共 Banner 样式（从各页面 css 提取汇总）
   对应模版：banner.html / banner_pro.html / banner_solution.html / banner_video.html
   命名前缀：ruicheng-nl-*（新闻）· ruicheng-pro-*（产品）
             ruicheng-sol-*（方案）· ruicheng-vl-*（视频）
   ========================================================================== */

/* --------------------------------------------------------------------------
   一、新闻/资讯列表页 Banner（news.css 迁移）· ruicheng-nl-banner
   模版：banner.html
   -------------------------------------------------------------------------- */
.ruicheng-nl-banner{position:relative;width:100%;height:440px;overflow:hidden;}
.ruicheng-nl-banner-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(1.08);}
.ruicheng-nl-banner::before{content:'';position:absolute;inset:0;background:rgba(11,61,145,0.88);z-index:1;}
.ruicheng-nl-banner::after{content:'';position:absolute;right:-80px;top:-80px;width:420px;height:420px;border-radius:50%;border:1px solid rgba(201,169,110,0.18);background:rgba(201,169,110,0.04);z-index:1;pointer-events:none;}
.ruicheng-nl-banner-content{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;max-width:1450px;margin:0 auto;padding:0 32px;color:#FFFFFF;}
.ruicheng-nl-banner-tag{display:inline-flex;align-items:center;gap:8px;padding:7px 18px 7px 18px;font-size:12.5px;letter-spacing:1.8px;border-radius:999px;color:#FFFFFF;background:rgba(201,169,110,0.14);border:1px solid rgba(201,169,110,0.36);margin-bottom:22px;font-weight:600;backdrop-filter:blur(4px);}
.ruicheng-nl-banner-tag i{color:#C9A96E;}
.ruicheng-nl-banner-content h1{margin:0;font-size:44px;font-weight:800;line-height:1.32;color:#FFFFFF;max-width:960px;letter-spacing:-.3px;}
.ruicheng-nl-banner-content h1 b{font-weight:800;color:#C9A96E;position:relative;}
.ruicheng-nl-banner-content h1 b::after{content:'';position:absolute;left:0;bottom:2px;width:100%;height:3px;background:rgba(201,169,110,0.72);border-radius:2px;opacity:.7;}
.ruicheng-nl-banner-content p{margin:18px 0 0 0;font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.86);max-width:820px;letter-spacing:.2px;}

/* 新闻 Banner 响应式 */
@media (max-width:1199px){
  .ruicheng-nl-banner{height:380px;}
  .ruicheng-nl-banner-content h1{font-size:36px;max-width:680px;}
}
@media (max-width:767px){
  .ruicheng-nl-banner{height:280px;}
  .ruicheng-nl-banner-content h1{font-size:24px;max-width:100%;}
  .ruicheng-nl-banner-content p{font-size:14px;}
}

/* --------------------------------------------------------------------------
   二、产品列表页 Banner（pro.css 迁移）· ruicheng-pro-banner
   模版：banner_pro.html    （单张图，非轮播）
   -------------------------------------------------------------------------- */
.ruicheng-pro-banner {
  position: relative;
  width: 100%;
  min-height: 300px;
  max-height: 360px;
  overflow: hidden;
  background: #051a3f;
}
.ruicheng-pro-banner-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
  filter: brightness(0.55);
}
.ruicheng-pro-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(11, 61, 145, 0.50);
  z-index: 1;
}
.ruicheng-pro-banner-content {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  max-width: var(--ruicheng-container-max);
  margin: 0 auto;
  padding: 0 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.ruicheng-pro-banner-tag {
  display: inline-block;
  padding: 5px 16px;
  font-size: 12px;
  letter-spacing: 4px;
  font-weight: 600;
  color: #fff;
  background: rgba(201, 169, 110, 0.92);
  border-radius: 20px;
  margin-bottom: 20px;
}
.ruicheng-pro-banner-title {
  margin: 0 0 16px 0;
  font-size: 44px;
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  font-family: 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
  max-width: 960px;
}
.ruicheng-pro-banner-title b { color: var(--ruicheng-accent); font-weight: 700; }
.ruicheng-pro-banner-sub {
  max-width: 780px;
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
}

/* 产品 Banner 响应式 */
@media (max-width: 1199px) {
  .ruicheng-pro-banner-title { font-size: 36px; }
}
@media (max-width: 991px) {
  .ruicheng-pro-banner { min-height: 260px; }
  .ruicheng-pro-banner-content { padding: 70px 24px 56px 24px; }
  .ruicheng-pro-banner-title { font-size: 30px; }
}
@media (max-width: 767px) {
  .ruicheng-pro-banner { min-height: 220px; }
  .ruicheng-pro-banner-content { padding: 54px 18px 44px 18px; }
  .ruicheng-pro-banner-tag { font-size: 10px; letter-spacing: 2.5px; padding: 4px 12px; margin-bottom: 14px; }
  .ruicheng-pro-banner-title { font-size: 24px; }
  .ruicheng-pro-banner-sub { font-size: 14px; }
}

/* --------------------------------------------------------------------------
   三、行业方案列表页 Banner（solution.css 迁移）· ruicheng-sol-banner
   模版：banner_solution.html
   注：`.ruicheng-sol-stat*` 属于 banner 内的行业数据栏，一并迁移
   -------------------------------------------------------------------------- */
.ruicheng-sol-banner {
  position: relative;
  width: 100%;
  min-height: 580px;
  padding: 120px 0 110px;
  overflow: hidden;
  isolation: isolate;
  display: flex;
  align-items: center;
}
.ruicheng-sol-banner-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.ruicheng-sol-banner-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
/* 蒙版（与 about/news/pro 页面风格统一） */
.ruicheng-sol-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(11, 61, 145, 0.88);
}
/* 右上装饰圈（金色系高端感） */
.ruicheng-sol-banner::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(201, 169, 110, 0.18);
  background: rgba(201, 169, 110, 0.04);
  z-index: -1;
  pointer-events: none;
}

.ruicheng-sol-banner-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  max-width: 1180px;
  margin: 0 auto;
}
.ruicheng-sol-banner-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 22px;
  border-radius: 999px;
  color: var(--ruicheng-accent);
  background: rgba(201, 169, 110, 0.12);
  border: 1px solid rgba(201, 169, 110, 0.36);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 30px;
  backdrop-filter: blur(6px);
}
.ruicheng-sol-banner-tag i {
  color: var(--ruicheng-accent);
}
.ruicheng-sol-banner-title {
  font-size: 54px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.5px;
  max-width: 980px;
  margin-bottom: 24px;
  color: #fff;
}
.ruicheng-sol-banner-title b {
  color: var(--ruicheng-accent);
  font-weight: 800;
}
.ruicheng-sol-banner-sub {
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255,255,255,0.88);
  max-width: 880px;
  margin: 0 auto 40px;
  text-shadow: 0 1px 2px rgba(10,26,51,0.35);
}
.ruicheng-sol-banner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-bottom: 56px;
}
.ruicheng-sol-banner-actions .ruicheng-btn-outline {
  border-color: rgba(255,255,255,0.55);
  color: #fff;
}
.ruicheng-sol-banner-actions .ruicheng-btn-outline:hover {
  background: rgba(255,255,255,0.12);
  color: var(--ruicheng-accent);
  border-color: var(--ruicheng-accent);
}

/* 行业数据 4 栏 */
.ruicheng-sol-banner-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 26px 30px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  backdrop-filter: blur(8px);
}
.ruicheng-sol-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  position: relative;
}
.ruicheng-sol-stat + .ruicheng-sol-stat::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 10%;
  height: 80%;
  width: 1px;
  background: rgba(255,255,255,0.14);
}
.ruicheng-sol-stat span {
  font-size: 36px;
  font-weight: 800;
  color: var(--ruicheng-accent);
  line-height: 1.1;
  letter-spacing: -0.5px;
}
.ruicheng-sol-stat span span {
  font-size: 16px;
  font-weight: 700;
  color: var(--ruicheng-accent);
  margin-left: 2px;
}
.ruicheng-sol-stat em {
  font-style: normal;
  font-size: 13.5px;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.5px;
}

/* 方案 Banner 响应式 */
@media (max-width: 1280px) {
  .ruicheng-sol-banner-title { font-size: 46px; }
}
@media (max-width: 991px) {
  .ruicheng-sol-banner { min-height: 520px; padding: 110px 0 90px; }
  .ruicheng-sol-banner-title { font-size: 38px; max-width: 680px; }
  .ruicheng-sol-banner-sub { font-size: 16px; max-width: 680px; margin-bottom: 32px; }
  .ruicheng-sol-banner-stats { grid-template-columns: repeat(2, 1fr); max-width: 680px; gap: 18px; padding: 20px; }
  .ruicheng-sol-stat:nth-child(odd)::before { display: none; }
  .ruicheng-sol-stat span { font-size: 32px; }
}
@media (max-width: 767px) {
  .ruicheng-sol-banner { min-height: 460px; padding: 96px 0 72px; }
  .ruicheng-sol-banner::after { width: 260px; height: 260px; right: -100px; top: -100px; }
  .ruicheng-sol-banner-tag { padding: 8px 18px; font-size: 12px; margin-bottom: 22px; }
  .ruicheng-sol-banner-title { font-size: 28px; line-height: 1.3; max-width: 100%; margin-bottom: 18px; }
  .ruicheng-sol-banner-sub { font-size: 14.5px; line-height: 1.8; max-width: 100%; margin-bottom: 28px; }
  .ruicheng-sol-banner-actions { flex-direction: column; align-items: stretch; width: 100%; max-width: 360px; }
  .ruicheng-sol-banner-actions .ruicheng-btn { justify-content: center; width: 100%; }
  .ruicheng-sol-banner-stats { grid-template-columns: repeat(2, 1fr); max-width: 100%; padding: 18px 14px; gap: 16px 12px; }
  .ruicheng-sol-stat span { font-size: 26px; }
  .ruicheng-sol-stat span span { font-size: 14px; }
  .ruicheng-sol-stat em { font-size: 12.5px; }
}
@media (max-width: 420px) {
  .ruicheng-sol-banner-title { font-size: 24px; }
  .ruicheng-sol-banner-stats { grid-template-columns: 1fr 1fr; }
}

/* --------------------------------------------------------------------------
   四、视频展示列表页 Banner（video.css 迁移）· ruicheng-vl-banner
   模版：banner_video.html
   -------------------------------------------------------------------------- */
.ruicheng-vl-banner {
  position: relative;
  width: 100%;
  height: 380px;
  overflow: hidden;
  background: #0B3D91;
}

.ruicheng-vl-banner-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 1;
  filter: saturate(1.08);
}

.ruicheng-vl-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(11, 61, 145, 0.86);
  z-index: 1;
}

.ruicheng-vl-banner::after {
  content: '';
  position: absolute;
  right: -100px;
  top: -100px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  border: 1px solid rgba(201, 169, 110, 0.16);
  background: rgba(201, 169, 110, 0.03);
  z-index: 1;
  pointer-events: none;
}

.ruicheng-vl-banner-content {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  max-width: var(--ruicheng-container-max);
  margin: 0 auto;
  padding: 0 32px;
  color: #FFFFFF;
}

.ruicheng-vl-banner-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 22px;
  font-size: 13px;
  letter-spacing: 2px;
  border: 1px solid rgba(201, 169, 110, 0.36);
  border-radius: 999px;
  color: #C9A96E;
  background: rgba(201, 169, 110, 0.12);
  margin-bottom: 22px;
  backdrop-filter: blur(6px);
}

.ruicheng-vl-banner-title {
  margin: 0;
  font-size: 42px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 1px;
  color: #FFFFFF;
  max-width: 960px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}
.ruicheng-vl-banner-title b {
  font-weight: 800;
  color: #C9A96E;
}

.ruicheng-vl-banner-sub {
  margin: 18px 0 0 0;
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.5px;
  color: rgba(255, 255, 255, 0.88);
  max-width: 820px;
}

/* 视频 Banner 响应式 */
@media (max-width: 1399px) {
  .ruicheng-vl-banner-title { font-size: 38px; }
}
@media (max-width: 1199px) {
  .ruicheng-vl-banner { height: 340px; }
  .ruicheng-vl-banner-title { font-size: 32px; }
  .ruicheng-vl-banner-sub { font-size: 15px; }
}
@media (max-width: 991px) {
  .ruicheng-vl-banner { height: 300px; }
  .ruicheng-vl-banner-content { padding: 0 22px; }
  .ruicheng-vl-banner-tag { font-size: 12px; padding: 5px 14px; margin-bottom: 16px; }
  .ruicheng-vl-banner-title { font-size: 28px; }
  .ruicheng-vl-banner-sub { font-size: 14px; }
}
@media (max-width: 767px) {
  .ruicheng-vl-banner { height: 260px; }
  .ruicheng-vl-banner-title { font-size: 22px; letter-spacing: 0.5px; }
  .ruicheng-vl-banner-sub { font-size: 13px; line-height: 1.7; }
}
@media (max-width: 575px) {
  .ruicheng-vl-banner { height: 230px; }
  .ruicheng-vl-banner-title { font-size: 19px; line-height: 1.4; }
  .ruicheng-vl-banner-tag { letter-spacing: 1px; padding: 4px 12px; font-size: 11.5px; }
}